Add everything.

src/ThirdParty/ImGuizmo/GraphEditor.h

@@ -0,0 +1,151 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+
+#include <vector>
+#include <stdint.h>
+#include <string>
+#include "imgui.h"
+#include "imgui_internal.h"
+
+namespace GraphEditor {
+
+typedef size_t NodeIndex;
+typedef size_t SlotIndex;
+typedef size_t LinkIndex;
+typedef size_t TemplateIndex;
+
+// Force the view to be respositionned and zoom to fit nodes with Show function.
+// Parameter value will be changed to Fit_None by the function.
+enum FitOnScreen
+{
+    Fit_None,
+    Fit_AllNodes,
+    Fit_SelectedNodes
+};
+
+// Display options and colors
+struct Options
+{
+    ImRect mMinimap{{0.75f, 0.8f, 0.99f, 0.99f}}; // rectangle coordinates of minimap
+    ImU32 mBackgroundColor{ IM_COL32(40, 40, 40, 255) }; // full background color
+    ImU32 mGridColor{ IM_COL32(0, 0, 0, 60) }; // grid lines color
+    ImU32 mGridColor2{ IM_COL32(0, 0, 0, 160) }; // grid lines color every 10th
+    ImU32 mSelectedNodeBorderColor{ IM_COL32(255, 130, 30, 255) }; // node border color when it's selected
+    ImU32 mNodeBorderColor{ IM_COL32(100, 100, 100, 0) }; // node border color when it's not selected
+    ImU32 mQuadSelection{ IM_COL32(255, 32, 32, 64) }; // quad selection inside color
+    ImU32 mQuadSelectionBorder{ IM_COL32(255, 32, 32, 255) }; // quad selection border color
+    ImU32 mDefaultSlotColor{ IM_COL32(128, 128, 128, 255) }; // when no color is provided in node template, use this value
+    ImU32 mFrameFocus{ IM_COL32(64, 128, 255, 255) }; // rectangle border when graph editor has focus
+    float mLineThickness{ 5 }; // links width in pixels when zoom value is 1
+    float mGridSize{ 64.f }; // background grid size in pixels when zoom value is 1
+    float mRounding{ 3.f }; // rounding at node corners
+    float mZoomRatio{ 0.1f }; // factor per mouse wheel delta
+    float mZoomLerpFactor{ 0.25f }; // the smaller, the smoother
+    float mBorderSelectionThickness{ 6.f }; // thickness of selection border around nodes
+    float mBorderThickness{ 6.f }; // thickness of selection border around nodes
+    float mNodeSlotRadius{ 8.f }; // circle radius for inputs and outputs
+    float mNodeSlotHoverFactor{ 1.2f }; // increase size when hovering
+    float mMinZoom{ 0.2f }, mMaxZoom { 1.1f };
+    float mSnap{ 5.f };
+    bool mDisplayLinksAsCurves{ true }; // false is straight and 45deg lines
+    bool mAllowQuadSelection{ true }; // multiple selection using drag and drop
+    bool mRenderGrid{ true }; // grid or nothing
+    bool mDrawIONameOnHover{ true }; // only draw node input/output when hovering
+};
+
+// View state: scroll position and zoom factor
+struct ViewState
+{
+    ImVec2 mPosition{0.0f, 0.0f}; // scroll position
+    float mFactor{ 1.0f }; // current zoom factor
+    float mFactorTarget{ 1.0f }; // targeted zoom factor interpolated using Options.mZoomLerpFactor
+};
+
+struct Template
+{
+    ImU32 mHeaderColor;
+    ImU32 mBackgroundColor;
+    ImU32 mBackgroundColorOver;
+    ImU8 mInputCount;
+    const char** mInputNames; // can be nullptr. No text displayed.
+    ImU32* mInputColors; // can be nullptr, default slot color will be used.
+    ImU8 mOutputCount;
+    const char** mOutputNames; // can be nullptr. No text displayed.
+    ImU32* mOutputColors; // can be nullptr, default slot color will be used.
+};
+
+struct Node
+{
+    const char* mName;
+    TemplateIndex mTemplateIndex;
+    ImRect mRect;
+    bool mSelected{ false };
+};
+
+struct Link
+{
+    NodeIndex mInputNodeIndex;
+    SlotIndex mInputSlotIndex;
+    NodeIndex mOutputNodeIndex;
+    SlotIndex mOutputSlotIndex;
+};
+
+struct Delegate
+{
+    virtual bool AllowedLink(NodeIndex from, NodeIndex to) = 0;
+
+    virtual void SelectNode(NodeIndex nodeIndex, bool selected) = 0;
+    virtual void MoveSelectedNodes(const ImVec2 delta) = 0;
+    
+    virtual void AddLink(NodeIndex inputNodeIndex, SlotIndex inputSlotIndex, NodeIndex outputNodeIndex, SlotIndex outputSlotIndex) = 0;
+    virtual void DelLink(LinkIndex linkIndex) = 0;
+    
+    // user is responsible for clipping
+    virtual void CustomDraw(ImDrawList* drawList, ImRect rectangle, NodeIndex nodeIndex) = 0;
+    
+    // use mouse position to open context menu
+    // if nodeIndex != -1, right click happens on the specified node
+    virtual void RightClick(NodeIndex nodeIndex, SlotIndex slotIndexInput, SlotIndex slotIndexOutput) = 0;
+
+    virtual const size_t GetTemplateCount() = 0;
+    virtual const Template GetTemplate(TemplateIndex index) = 0;
+
+    virtual const size_t GetNodeCount() = 0;
+    virtual const Node GetNode(NodeIndex index) = 0;
+    
+    virtual const size_t GetLinkCount() = 0;
+    virtual const Link GetLink(LinkIndex index) = 0;
+
+    virtual ~Delegate() = default;
+};
+
+void Show(Delegate& delegate, const Options& options, ViewState& viewState, bool enabled, FitOnScreen* fit = nullptr);
+void GraphEditorClear();
+
+bool EditOptions(Options& options);
+
+} // namespace

src/ThirdParty/ImGuizmo/ImCurveEdit.cpp

@@ -0,0 +1,458 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#include "ImCurveEdit.h"
+#include "imgui.h"
+#include "imgui_internal.h"
+#include <stdint.h>
+#include <set>
+#include <vector>
+
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#include <malloc.h>
+#endif
+#if !defined(_MSC_VER) && !defined(__MINGW64_VERSION_MAJOR)
+#define _malloca(x) alloca(x)
+#define _freea(x)
+#endif
+
+namespace ImCurveEdit
+{
+
+#ifndef IMGUI_DEFINE_MATH_OPERATORS
+   static ImVec2 operator+(const ImVec2& a, const ImVec2& b) {
+      return ImVec2(a.x + b.x, a.y + b.y);
+   }
+
+   static ImVec2 operator-(const ImVec2& a, const ImVec2& b) {
+      return ImVec2(a.x - b.x, a.y - b.y);
+   }
+
+   static ImVec2 operator*(const ImVec2& a, const ImVec2& b) {
+      return ImVec2(a.x * b.x, a.y * b.y);
+   }
+
+   static ImVec2 operator/(const ImVec2& a, const ImVec2& b) {
+      return ImVec2(a.x / b.x, a.y / b.y);
+   }
+
+   static ImVec2 operator*(const ImVec2& a, const float b) {
+      return ImVec2(a.x * b, a.y * b);
+   }
+#endif
+
+   static float smoothstep(float edge0, float edge1, float x)
+   {
+      x = ImClamp((x - edge0) / (edge1 - edge0), 0.0f, 1.0f);
+      return x * x * (3 - 2 * x);
+   }
+
+   static float distance(float x, float y, float x1, float y1, float x2, float y2)
+   {
+      float A = x - x1;
+      float B = y - y1;
+      float C = x2 - x1;
+      float D = y2 - y1;
+
+      float dot = A * C + B * D;
+      float len_sq = C * C + D * D;
+      float param = -1.f;
+      if (len_sq > FLT_EPSILON)
+         param = dot / len_sq;
+
+      float xx, yy;
+
+      if (param < 0.f) {
+         xx = x1;
+         yy = y1;
+      }
+      else if (param > 1.f) {
+         xx = x2;
+         yy = y2;
+      }
+      else {
+         xx = x1 + param * C;
+         yy = y1 + param * D;
+      }
+
+      float dx = x - xx;
+      float dy = y - yy;
+      return sqrtf(dx * dx + dy * dy);
+   }
+
+   static int DrawPoint(ImDrawList* draw_list, ImVec2 pos, const ImVec2 size, const ImVec2 offset, bool edited)
+   {
+      int ret = 0;
+      ImGuiIO& io = ImGui::GetIO();
+
+      static const ImVec2 localOffsets[4] = { ImVec2(1,0), ImVec2(0,1), ImVec2(-1,0), ImVec2(0,-1) };
+      ImVec2 offsets[4];
+      for (int i = 0; i < 4; i++)
+      {
+         offsets[i] = pos * size + localOffsets[i] * 4.5f + offset;
+      }
+
+      const ImVec2 center = pos * size + offset;
+      const ImRect anchor(center - ImVec2(5, 5), center + ImVec2(5, 5));
+      draw_list->AddConvexPolyFilled(offsets, 4, 0xFF000000);
+      if (anchor.Contains(io.MousePos))
+      {
+         ret = 1;
+         if (io.MouseDown[0])
+            ret = 2;
+      }
+      if (edited)
+         draw_list->AddPolyline(offsets, 4, 0xFFFFFFFF, true, 3.0f);
+      else if (ret)
+         draw_list->AddPolyline(offsets, 4, 0xFF80B0FF, true, 2.0f);
+      else
+         draw_list->AddPolyline(offsets, 4, 0xFF0080FF, true, 2.0f);
+
+      return ret;
+   }
+
+   int Edit(Delegate& delegate, const ImVec2& size, unsigned int id, const ImRect* clippingRect, ImVector<EditPoint>* selectedPoints)
+   {
+      static bool selectingQuad = false;
+      static ImVec2 quadSelection;
+      static int overCurve = -1;
+      static int movingCurve = -1;
+      static bool scrollingV = false;
+      static std::set<EditPoint> selection;
+      static bool overSelectedPoint = false;
+
+      int ret = 0;
+
+      ImGuiIO& io = ImGui::GetIO();
+      ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
+      ImGui::PushStyleColor(ImGuiCol_Border, 0);
+      ImGui::BeginChild(id, size, ImGuiChildFlags_FrameStyle);
+      delegate.focused = ImGui::IsWindowFocused();
+      ImDrawList* draw_list = ImGui::GetWindowDrawList();
+      if (clippingRect)
+         draw_list->PushClipRect(clippingRect->Min, clippingRect->Max, true);
+
+      const ImVec2 offset = ImGui::GetCursorScreenPos() + ImVec2(0.f, size.y);
+      const ImVec2 ssize(size.x, -size.y);
+      const ImRect container(offset + ImVec2(0.f, ssize.y), offset + ImVec2(ssize.x, 0.f));
+      ImVec2& min = delegate.GetMin();
+      ImVec2& max = delegate.GetMax();
+
+      // handle zoom and VScroll
+      if (container.Contains(io.MousePos))
+      {
+         if (fabsf(io.MouseWheel) > FLT_EPSILON)
+         {
+            const float r = (io.MousePos.y - offset.y) / ssize.y;
+            float ratioY = ImLerp(min.y, max.y, r);
+            auto scaleValue = [&](float v) {
+               v -= ratioY;
+               v *= (1.f - io.MouseWheel * 0.05f);
+               v += ratioY;
+               return v;
+            };
+            min.y = scaleValue(min.y);
+            max.y = scaleValue(max.y);
+         }
+         if (!scrollingV && ImGui::IsMouseDown(2))
+         {
+            scrollingV = true;
+         }
+      }
+      ImVec2 range = max - min + ImVec2(1.f, 0.f);  // +1 because of inclusive last frame
+
+      const ImVec2 viewSize(size.x, -size.y);
+      const ImVec2 sizeOfPixel = ImVec2(1.f, 1.f) / viewSize;
+      const size_t curveCount = delegate.GetCurveCount();
+
+      if (scrollingV)
+      {
+         float deltaH = io.MouseDelta.y * range.y * sizeOfPixel.y;
+         min.y -= deltaH;
+         max.y -= deltaH;
+         if (!ImGui::IsMouseDown(2))
+            scrollingV = false;
+      }
+
+      draw_list->AddRectFilled(offset, offset + ssize, delegate.GetBackgroundColor());
+
+      auto pointToRange = [&](ImVec2 pt) { return (pt - min) / range; };
+      auto rangeToPoint = [&](ImVec2 pt) { return (pt * range) + min; };
+
+      draw_list->AddLine(ImVec2(-1.f, -min.y / range.y) * viewSize + offset, ImVec2(1.f, -min.y / range.y) * viewSize + offset, 0xFF000000, 1.5f);
+      bool overCurveOrPoint = false;
+
+      int localOverCurve = -1;
+      // make sure highlighted curve is rendered last
+      int* curvesIndex = (int*)_malloca(sizeof(int) * curveCount);
+      for (size_t c = 0; c < curveCount; c++)
+         curvesIndex[c] = int(c);
+      int highLightedCurveIndex = -1;
+      if (overCurve != -1 && curveCount)
+      {
+         ImSwap(curvesIndex[overCurve], curvesIndex[curveCount - 1]);
+         highLightedCurveIndex = overCurve;
+      }
+
+      for (size_t cur = 0; cur < curveCount; cur++)
+      {
+         int c = curvesIndex[cur];
+         if (!delegate.IsVisible(c))
+            continue;
+         const size_t ptCount = delegate.GetPointCount(c);
+         if (ptCount < 1)
+            continue;
+         CurveType curveType = delegate.GetCurveType(c);
+         if (curveType == CurveNone)
+            continue;
+         const ImVec2* pts = delegate.GetPoints(c);
+         uint32_t curveColor = delegate.GetCurveColor(c);
+         if ((c == highLightedCurveIndex && selection.empty() && !selectingQuad) || movingCurve == c)
+            curveColor = 0xFFFFFFFF;
+
+         for (size_t p = 0; p < ptCount - 1; p++)
+         {
+            const ImVec2 p1 = pointToRange(pts[p]);
+            const ImVec2 p2 = pointToRange(pts[p + 1]);
+
+            if (curveType == CurveSmooth || curveType == CurveLinear)
+            {
+               size_t subStepCount = (curveType == CurveSmooth) ? 20 : 2;
+               float step = 1.f / float(subStepCount - 1);
+               for (size_t substep = 0; substep < subStepCount - 1; substep++)
+               {
+                  float t = float(substep) * step;
+
+                  const ImVec2 sp1 = ImLerp(p1, p2, t);
+                  const ImVec2 sp2 = ImLerp(p1, p2, t + step);
+
+                  const float rt1 = smoothstep(p1.x, p2.x, sp1.x);
+                  const float rt2 = smoothstep(p1.x, p2.x, sp2.x);
+
+                  const ImVec2 pos1 = ImVec2(sp1.x, ImLerp(p1.y, p2.y, rt1)) * viewSize + offset;
+                  const ImVec2 pos2 = ImVec2(sp2.x, ImLerp(p1.y, p2.y, rt2)) * viewSize + offset;
+
+                  if (distance(io.MousePos.x, io.MousePos.y, pos1.x, pos1.y, pos2.x, pos2.y) < 8.f && !scrollingV)
+                  {
+                     localOverCurve = int(c);
+                     overCurve = int(c);
+                     overCurveOrPoint = true;
+                  }
+
+                  draw_list->AddLine(pos1, pos2, curveColor, 1.3f);
+               } // substep
+            }
+            else if (curveType == CurveDiscrete)
+            {
+               ImVec2 dp1 = p1 * viewSize + offset;
+               ImVec2 dp2 = ImVec2(p2.x, p1.y) * viewSize + offset;
+               ImVec2 dp3 = p2 * viewSize + offset;
+               draw_list->AddLine(dp1, dp2, curveColor, 1.3f);
+               draw_list->AddLine(dp2, dp3, curveColor, 1.3f);
+
+               if ((distance(io.MousePos.x, io.MousePos.y, dp1.x, dp1.y, dp3.x, dp1.y) < 8.f ||
+                  distance(io.MousePos.x, io.MousePos.y, dp3.x, dp1.y, dp3.x, dp3.y) < 8.f)
+                  /*&& localOverCurve == -1*/)
+               {
+                  localOverCurve = int(c);
+                  overCurve = int(c);
+                  overCurveOrPoint = true;
+               }
+            }
+         } // point loop
+
+         for (size_t p = 0; p < ptCount; p++)
+         {
+            const int drawState = DrawPoint(draw_list, pointToRange(pts[p]), viewSize, offset, (selection.find({ int(c), int(p) }) != selection.end() && movingCurve == -1 && !scrollingV));
+            if (drawState && movingCurve == -1 && !selectingQuad)
+            {
+               overCurveOrPoint = true;
+               overSelectedPoint = true;
+               overCurve = -1;
+               if (drawState == 2)
+               {
+                  if (!io.KeyShift && selection.find({ int(c), int(p) }) == selection.end())
+                     selection.clear();
+                  selection.insert({ int(c), int(p) });
+               }
+            }
+         }
+      } // curves loop
+
+      if (localOverCurve == -1)
+         overCurve = -1;
+
+      // move selection
+      static bool pointsMoved = false;
+      static ImVec2 mousePosOrigin;
+      static std::vector<ImVec2> originalPoints;
+      if (overSelectedPoint && io.MouseDown[0])
+      {
+         if ((fabsf(io.MouseDelta.x) > 0.f || fabsf(io.MouseDelta.y) > 0.f) && !selection.empty())
+         {
+            if (!pointsMoved)
+            {
+               delegate.BeginEdit(0);
+               mousePosOrigin = io.MousePos;
+               originalPoints.resize(selection.size());
+               int index = 0;
+               for (auto& sel : selection)
+               {
+                  const ImVec2* pts = delegate.GetPoints(sel.curveIndex);
+                  originalPoints[index++] = pts[sel.pointIndex];
+               }
+            }
+            pointsMoved = true;
+            ret = 1;
+            auto prevSelection = selection;
+            int originalIndex = 0;
+            for (auto& sel : prevSelection)
+            {
+               const ImVec2 p = rangeToPoint(pointToRange(originalPoints[originalIndex]) + (io.MousePos - mousePosOrigin) * sizeOfPixel);
+               const int newIndex = delegate.EditPoint(sel.curveIndex, sel.pointIndex, p);
+               if (newIndex != sel.pointIndex)
+               {
+                  selection.erase(sel);
+                  selection.insert({ sel.curveIndex, newIndex });
+               }
+               originalIndex++;
+            }
+         }
+      }
+
+      if (overSelectedPoint && !io.MouseDown[0])
+      {
+         overSelectedPoint = false;
+         if (pointsMoved)
+         {
+            pointsMoved = false;
+            delegate.EndEdit();
+         }
+      }
+
+      // add point
+      if (overCurve != -1 && io.MouseDoubleClicked[0])
+      {
+         const ImVec2 np = rangeToPoint((io.MousePos - offset) / viewSize);
+         delegate.BeginEdit(overCurve);
+         delegate.AddPoint(overCurve, np);
+         delegate.EndEdit();
+         ret = 1;
+      }
+
+      // move curve
+
+      if (movingCurve != -1)
+      {
+         const size_t ptCount = delegate.GetPointCount(movingCurve);
+         const ImVec2* pts = delegate.GetPoints(movingCurve);
+         if (!pointsMoved)
+         {
+            mousePosOrigin = io.MousePos;
+            pointsMoved = true;
+            originalPoints.resize(ptCount);
+            for (size_t index = 0; index < ptCount; index++)
+            {
+               originalPoints[index] = pts[index];
+            }
+         }
+         if (ptCount >= 1)
+         {
+            for (size_t p = 0; p < ptCount; p++)
+            {
+               delegate.EditPoint(movingCurve, int(p), rangeToPoint(pointToRange(originalPoints[p]) + (io.MousePos - mousePosOrigin) * sizeOfPixel));
+            }
+            ret = 1;
+         }
+         if (!io.MouseDown[0])
+         {
+            movingCurve = -1;
+            pointsMoved = false;
+            delegate.EndEdit();
+         }
+      }
+      if (movingCurve == -1 && overCurve != -1 && ImGui::IsMouseClicked(0) && selection.empty() && !selectingQuad)
+      {
+         movingCurve = overCurve;
+         delegate.BeginEdit(overCurve);
+      }
+
+      // quad selection
+      if (selectingQuad)
+      {
+         const ImVec2 bmin = ImMin(quadSelection, io.MousePos);
+         const ImVec2 bmax = ImMax(quadSelection, io.MousePos);
+         draw_list->AddRectFilled(bmin, bmax, 0x40FF0000, 1.f);
+         draw_list->AddRect(bmin, bmax, 0xFFFF0000, 1.f);
+         const ImRect selectionQuad(bmin, bmax);
+         if (!io.MouseDown[0])
+         {
+            if (!io.KeyShift)
+               selection.clear();
+            // select everythnig is quad
+            for (size_t c = 0; c < curveCount; c++)
+            {
+               if (!delegate.IsVisible(c))
+                  continue;
+
+               const size_t ptCount = delegate.GetPointCount(c);
+               if (ptCount < 1)
+                  continue;
+
+               const ImVec2* pts = delegate.GetPoints(c);
+               for (size_t p = 0; p < ptCount; p++)
+               {
+                  const ImVec2 center = pointToRange(pts[p]) * viewSize + offset;
+                  if (selectionQuad.Contains(center))
+                     selection.insert({ int(c), int(p) });
+               }
+            }
+            // done
+            selectingQuad = false;
+         }
+      }
+      if (!overCurveOrPoint && ImGui::IsMouseClicked(0) && !selectingQuad && movingCurve == -1 && !overSelectedPoint && container.Contains(io.MousePos))
+      {
+         selectingQuad = true;
+         quadSelection = io.MousePos;
+      }
+      if (clippingRect)
+         draw_list->PopClipRect();
+
+      ImGui::EndChild();
+      ImGui::PopStyleVar();
+      ImGui::PopStyleColor(1);
+
+      if (selectedPoints)
+      {
+         selectedPoints->resize(int(selection.size()));
+         int index = 0;
+         for (auto& point : selection)
+            (*selectedPoints)[index++] = point;
+      }
+      _freea(curvesIndex);      
+      return ret;
+   }
+}

src/ThirdParty/ImGuizmo/ImCurveEdit.h

@@ -0,0 +1,82 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+#include <stdint.h>
+#include "imgui.h"
+
+struct ImRect;
+
+namespace ImCurveEdit
+{
+   enum CurveType
+   {
+      CurveNone,
+      CurveDiscrete,
+      CurveLinear,
+      CurveSmooth,
+      CurveBezier,
+   };
+
+   struct EditPoint
+   {
+      int curveIndex;
+      int pointIndex;
+      bool operator <(const EditPoint& other) const
+      {
+         if (curveIndex < other.curveIndex)
+            return true;
+         if (curveIndex > other.curveIndex)
+            return false;
+
+         if (pointIndex < other.pointIndex)
+            return true;
+         return false;
+      }
+   };
+
+   struct Delegate
+   {
+      bool focused = false;
+      virtual size_t GetCurveCount() = 0;
+      virtual bool IsVisible(size_t /*curveIndex*/) { return true; }
+      virtual CurveType GetCurveType(size_t /*curveIndex*/) const { return CurveLinear; }
+      virtual ImVec2& GetMin() = 0;
+      virtual ImVec2& GetMax() = 0;
+      virtual size_t GetPointCount(size_t curveIndex) = 0;
+      virtual uint32_t GetCurveColor(size_t curveIndex) = 0;
+      virtual ImVec2* GetPoints(size_t curveIndex) = 0;
+      virtual int EditPoint(size_t curveIndex, int pointIndex, ImVec2 value) = 0;
+      virtual void AddPoint(size_t curveIndex, ImVec2 value) = 0;
+      virtual unsigned int GetBackgroundColor() { return 0xFF202020; }
+      // handle undo/redo thru this functions
+      virtual void BeginEdit(int /*index*/) {}
+      virtual void EndEdit() {}
+
+      virtual ~Delegate() = default;
+   };
+
+   int Edit(Delegate& delegate, const ImVec2& size, unsigned int id, const ImRect* clippingRect = NULL, ImVector<EditPoint>* selectedPoints = NULL);
+}

src/ThirdParty/ImGuizmo/ImGradient.cpp

@@ -0,0 +1,116 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#include "ImGradient.h"
+#include "imgui.h"
+#include "imgui_internal.h"
+
+namespace ImGradient
+{
+#ifndef IMGUI_DEFINE_MATH_OPERATORS
+   static inline ImVec2 operator*(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x * rhs, lhs.y * rhs); }
+   static inline ImVec2 operator/(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x / rhs, lhs.y / rhs); }
+   static inline ImVec2 operator+(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x + rhs.x, lhs.y + rhs.y); }
+   static inline ImVec2 operator-(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x - rhs.x, lhs.y - rhs.y); }
+   static inline ImVec2 operator*(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x * rhs.x, lhs.y * rhs.y); }
+   static inline ImVec2 operator/(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x / rhs.x, lhs.y / rhs.y); }
+#endif
+
+   static int DrawPoint(ImDrawList* draw_list, ImVec4 color, const ImVec2 size, bool editing, ImVec2 pos)
+   {
+      ImGuiIO& io = ImGui::GetIO();
+
+      ImVec2 p1 = ImLerp(pos, ImVec2(pos + ImVec2(size.x - size.y, 0.f)), color.w) + ImVec2(3, 3);
+      ImVec2 p2 = ImLerp(pos + ImVec2(size.y, size.y), ImVec2(pos + size), color.w) - ImVec2(3, 3);
+      ImRect rc(p1, p2);
+
+      color.w = 1.f;
+      draw_list->AddRectFilled(p1, p2, ImColor(color));
+      if (editing)
+         draw_list->AddRect(p1, p2, 0xFFFFFFFF, 2.f, 15, 2.5f);
+      else
+         draw_list->AddRect(p1, p2, 0x80FFFFFF, 2.f, 15, 1.25f);
+
+      if (rc.Contains(io.MousePos))
+      {
+         if (io.MouseClicked[0])
+            return 2;
+         return 1;
+      }
+      return 0;
+   }
+
+   bool Edit(Delegate& delegate, const ImVec2& size, int& selection)
+   {
+      bool ret = false;
+      ImGuiIO& io = ImGui::GetIO();
+      ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
+      ImGui::BeginChild(137, size, ImGuiChildFlags_FrameStyle);
+
+      ImDrawList* draw_list = ImGui::GetWindowDrawList();
+      const ImVec2 offset = ImGui::GetCursorScreenPos();
+
+      const ImVec4* pts = delegate.GetPoints();
+      static int currentSelection = -1;
+      static int movingPt = -1;
+      if (currentSelection >= int(delegate.GetPointCount()))
+         currentSelection = -1;
+      if (movingPt != -1)
+      {
+         ImVec4 current = pts[movingPt];
+         current.w += io.MouseDelta.x / size.x;
+         current.w = ImClamp(current.w, 0.f, 1.f);
+         delegate.EditPoint(movingPt, current);
+         ret = true;
+         if (!io.MouseDown[0])
+            movingPt = -1;
+      }
+      for (size_t i = 0; i < delegate.GetPointCount(); i++)
+      {
+         int ptSel = DrawPoint(draw_list, pts[i], size, i == currentSelection, offset);
+         if (ptSel == 2)
+         {
+            currentSelection = int(i);
+            ret = true;
+         }
+         if (ptSel == 1 && io.MouseDown[0] && movingPt == -1)
+         {
+            movingPt = int(i);
+         }
+      }
+      ImRect rc(offset, offset + size);
+      if (rc.Contains(io.MousePos) && io.MouseDoubleClicked[0])
+      {
+         float t = (io.MousePos.x - offset.x) / size.x;
+         delegate.AddPoint(delegate.GetPoint(t));
+         ret = true;
+      }
+      ImGui::EndChild();
+      ImGui::PopStyleVar();
+
+      selection = currentSelection;
+      return ret;
+   }
+}

src/ThirdParty/ImGuizmo/ImGradient.h

@@ -0,0 +1,45 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+#include <cstddef>
+
+struct ImVec4;
+struct ImVec2;
+
+namespace ImGradient
+{
+   struct Delegate
+   {
+      virtual size_t GetPointCount() = 0;
+      virtual ImVec4* GetPoints() = 0;
+      virtual int EditPoint(int pointIndex, ImVec4 value) = 0;
+      virtual ImVec4 GetPoint(float t) = 0;
+      virtual void AddPoint(ImVec4 value) = 0;
+      virtual ~Delegate() = default;
+   };
+
+   bool Edit(Delegate& delegate, const ImVec2& size, int& selection);
+}

src/ThirdParty/ImGuizmo/ImGuizmo.h

@@ -0,0 +1,306 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// -------------------------------------------------------------------------------------------
+// History :
+// 2019/11/03 View gizmo
+// 2016/09/11 Behind camera culling. Scaling Delta matrix not multiplied by source matrix scales. local/world rotation and translation fixed. Display message is incorrect (X: ... Y:...) in local mode.
+// 2016/09/09 Hatched negative axis. Snapping. Documentation update.
+// 2016/09/04 Axis switch and translation plan autohiding. Scale transform stability improved
+// 2016/09/01 Mogwai changed to Manipulate. Draw debug cube. Fixed inverted scale. Mixing scale and translation/rotation gives bad results.
+// 2016/08/31 First version
+//
+// -------------------------------------------------------------------------------------------
+// Future (no order):
+//
+// - Multi view
+// - display rotation/translation/scale infos in local/world space and not only local
+// - finish local/world matrix application
+// - OPERATION as bitmask
+//
+// -------------------------------------------------------------------------------------------
+// Example
+#if 0
+void EditTransform(const Camera& camera, matrix_t& matrix)
+{
+   static ImGuizmo::OPERATION mCurrentGizmoOperation(ImGuizmo::ROTATE);
+   static ImGuizmo::MODE mCurrentGizmoMode(ImGuizmo::WORLD);
+   if (ImGui::IsKeyPressed(90))
+      mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+   if (ImGui::IsKeyPressed(69))
+      mCurrentGizmoOperation = ImGuizmo::ROTATE;
+   if (ImGui::IsKeyPressed(82)) // r Key
+      mCurrentGizmoOperation = ImGuizmo::SCALE;
+   if (ImGui::RadioButton("Translate", mCurrentGizmoOperation == ImGuizmo::TRANSLATE))
+      mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+   ImGui::SameLine();
+   if (ImGui::RadioButton("Rotate", mCurrentGizmoOperation == ImGuizmo::ROTATE))
+      mCurrentGizmoOperation = ImGuizmo::ROTATE;
+   ImGui::SameLine();
+   if (ImGui::RadioButton("Scale", mCurrentGizmoOperation == ImGuizmo::SCALE))
+      mCurrentGizmoOperation = ImGuizmo::SCALE;
+   float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+   ImGuizmo::DecomposeMatrixToComponents(matrix.m16, matrixTranslation, matrixRotation, matrixScale);
+   ImGui::InputFloat3("Tr", matrixTranslation, 3);
+   ImGui::InputFloat3("Rt", matrixRotation, 3);
+   ImGui::InputFloat3("Sc", matrixScale, 3);
+   ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, matrix.m16);
+
+   if (mCurrentGizmoOperation != ImGuizmo::SCALE)
+   {
+      if (ImGui::RadioButton("Local", mCurrentGizmoMode == ImGuizmo::LOCAL))
+         mCurrentGizmoMode = ImGuizmo::LOCAL;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("World", mCurrentGizmoMode == ImGuizmo::WORLD))
+         mCurrentGizmoMode = ImGuizmo::WORLD;
+   }
+   static bool useSnap(false);
+   if (ImGui::IsKeyPressed(83))
+      useSnap = !useSnap;
+   ImGui::Checkbox("", &useSnap);
+   ImGui::SameLine();
+   vec_t snap;
+   switch (mCurrentGizmoOperation)
+   {
+   case ImGuizmo::TRANSLATE:
+      snap = config.mSnapTranslation;
+      ImGui::InputFloat3("Snap", &snap.x);
+      break;
+   case ImGuizmo::ROTATE:
+      snap = config.mSnapRotation;
+      ImGui::InputFloat("Angle Snap", &snap.x);
+      break;
+   case ImGuizmo::SCALE:
+      snap = config.mSnapScale;
+      ImGui::InputFloat("Scale Snap", &snap.x);
+      break;
+   }
+   ImGuiIO& io = ImGui::GetIO();
+   ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
+   ImGuizmo::Manipulate(camera.mView.m16, camera.mProjection.m16, mCurrentGizmoOperation, mCurrentGizmoMode, matrix.m16, NULL, useSnap ? &snap.x : NULL);
+}
+#endif
+#pragma once
+
+#ifdef USE_IMGUI_API
+#include "imconfig.h"
+#endif
+#ifndef IMGUI_API
+#define IMGUI_API
+#endif
+
+#ifndef IMGUIZMO_NAMESPACE
+#define IMGUIZMO_NAMESPACE ImGuizmo
+#endif
+
+struct ImGuiWindow;
+
+namespace IMGUIZMO_NAMESPACE
+{
+   // call inside your own window and before Manipulate() in order to draw gizmo to that window.
+   // Or pass a specific ImDrawList to draw to (e.g. ImGui::GetForegroundDrawList()).
+   IMGUI_API void SetDrawlist(ImDrawList* drawlist = nullptr);
+
+   // call BeginFrame right after ImGui_XXXX_NewFrame();
+   IMGUI_API void BeginFrame();
+
+   // this is necessary because when imguizmo is compiled into a dll, and imgui into another
+   // globals are not shared between them.
+   // More details at https://stackoverflow.com/questions/19373061/what-happens-to-global-and-static-variables-in-a-shared-library-when-it-is-dynam
+   // expose method to set imgui context
+   IMGUI_API void SetImGuiContext(ImGuiContext* ctx);
+
+   // return true if mouse cursor is over any gizmo control (axis, plan or screen component)
+   IMGUI_API bool IsOver();
+
+   // return true if mouse IsOver or if the gizmo is in moving state
+   IMGUI_API bool IsUsing();
+
+   // return true if the view gizmo is in moving state
+   IMGUI_API bool IsUsingViewManipulate();
+   // only check if your mouse is over the view manipulator - no matter whether it's active or not
+   IMGUI_API bool IsViewManipulateHovered();
+
+   // return true if any gizmo is in moving state
+   IMGUI_API bool IsUsingAny();
+
+   // enable/disable the gizmo. Stay in the state until next call to Enable.
+   // gizmo is rendered with gray half transparent color when disabled
+   IMGUI_API void Enable(bool enable);
+
+   // helper functions for manualy editing translation/rotation/scale with an input float
+   // translation, rotation and scale float points to 3 floats each
+   // Angles are in degrees (more suitable for human editing)
+   // example:
+   // float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+   // ImGuizmo::DecomposeMatrixToComponents(gizmoMatrix.m16, matrixTranslation, matrixRotation, matrixScale);
+   // ImGui::InputFloat3("Tr", matrixTranslation, 3);
+   // ImGui::InputFloat3("Rt", matrixRotation, 3);
+   // ImGui::InputFloat3("Sc", matrixScale, 3);
+   // ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, gizmoMatrix.m16);
+   //
+   // These functions have some numerical stability issues for now. Use with caution.
+   IMGUI_API void DecomposeMatrixToComponents(const float* matrix, float* translation, float* rotation, float* scale);
+   IMGUI_API void RecomposeMatrixFromComponents(const float* translation, const float* rotation, const float* scale, float* matrix);
+
+   IMGUI_API void SetRect(float x, float y, float width, float height);
+   // default is false
+   IMGUI_API void SetOrthographic(bool isOrthographic);
+
+   // Render a cube with face color corresponding to face normal. Usefull for debug/tests
+   IMGUI_API void DrawCubes(const float* view, const float* projection, const float* matrices, int matrixCount);
+   IMGUI_API void DrawGrid(const float* view, const float* projection, const float* matrix, const float gridSize);
+
+   // call it when you want a gizmo
+   // Needs view and projection matrices.
+   // matrix parameter is the source matrix (where will be gizmo be drawn) and might be transformed by the function. Return deltaMatrix is optional
+   // translation is applied in world space
+   enum OPERATION
+   {
+      TRANSLATE_X      = (1u << 0),
+      TRANSLATE_Y      = (1u << 1),
+      TRANSLATE_Z      = (1u << 2),
+      ROTATE_X         = (1u << 3),
+      ROTATE_Y         = (1u << 4),
+      ROTATE_Z         = (1u << 5),
+      ROTATE_SCREEN    = (1u << 6),
+      SCALE_X          = (1u << 7),
+      SCALE_Y          = (1u << 8),
+      SCALE_Z          = (1u << 9),
+      BOUNDS           = (1u << 10),
+      SCALE_XU         = (1u << 11),
+      SCALE_YU         = (1u << 12),
+      SCALE_ZU         = (1u << 13),
+
+      TRANSLATE = TRANSLATE_X | TRANSLATE_Y | TRANSLATE_Z,
+      ROTATE = ROTATE_X | ROTATE_Y | ROTATE_Z | ROTATE_SCREEN,
+      SCALE = SCALE_X | SCALE_Y | SCALE_Z,
+      SCALEU = SCALE_XU | SCALE_YU | SCALE_ZU, // universal
+      UNIVERSAL = TRANSLATE | ROTATE | SCALEU
+   };
+
+   inline OPERATION operator|(OPERATION lhs, OPERATION rhs)
+   {
+     return static_cast<OPERATION>(static_cast<int>(lhs) | static_cast<int>(rhs));
+   }
+
+   enum MODE
+   {
+      LOCAL,
+      WORLD
+   };
+
+   IMGUI_API bool Manipulate(const float* view, const float* projection, OPERATION operation, MODE mode, float* matrix, float* deltaMatrix = NULL, const float* snap = NULL, const float* localBounds = NULL, const float* boundsSnap = NULL);
+   //
+   // Please note that this cubeview is patented by Autodesk : https://patents.google.com/patent/US7782319B2/en
+   // It seems to be a defensive patent in the US. I don't think it will bring troubles using it as
+   // other software are using the same mechanics. But just in case, you are now warned!
+   //
+   IMGUI_API void ViewManipulate(float* view, float length, ImVec2 position, ImVec2 size, ImU32 backgroundColor);
+
+   // use this version if you did not call Manipulate before and you are just using ViewManipulate
+   IMGUI_API void ViewManipulate(float* view, const float* projection, OPERATION operation, MODE mode, float* matrix, float length, ImVec2 position, ImVec2 size, ImU32 backgroundColor);
+
+   IMGUI_API void SetAlternativeWindow(ImGuiWindow* window);
+
+   [[deprecated("Use PushID/PopID instead.")]]
+   IMGUI_API void SetID(int id);
+
+	// ID stack/scopes
+	// Read the FAQ (docs/FAQ.md or http://dearimgui.org/faq) for more details about how ID are handled in dear imgui.
+	// - Those questions are answered and impacted by understanding of the ID stack system:
+	//   - "Q: Why is my widget not reacting when I click on it?"
+	//   - "Q: How can I have widgets with an empty label?"
+	//   - "Q: How can I have multiple widgets with the same label?"
+	// - Short version: ID are hashes of the entire ID stack. If you are creating widgets in a loop you most likely
+	//   want to push a unique identifier (e.g. object pointer, loop index) to uniquely differentiate them.
+	// - You can also use the "Label##foobar" syntax within widget label to distinguish them from each others.
+	// - In this header file we use the "label"/"name" terminology to denote a string that will be displayed + used as an ID,
+	//   whereas "str_id" denote a string that is only used as an ID and not normally displayed.
+	IMGUI_API void          PushID(const char* str_id);                                     // push string into the ID stack (will hash string).
+	IMGUI_API void          PushID(const char* str_id_begin, const char* str_id_end);       // push string into the ID stack (will hash string).
+	IMGUI_API void          PushID(const void* ptr_id);                                     // push pointer into the ID stack (will hash pointer).
+	IMGUI_API void          PushID(int int_id);                                             // push integer into the ID stack (will hash integer).
+	IMGUI_API void          PopID();                                                        // pop from the ID stack.
+	IMGUI_API ImGuiID       GetID(const char* str_id);                                      // calculate unique ID (hash of whole ID stack + given parameter). e.g. if you want to query into ImGuiStorage yourself
+	IMGUI_API ImGuiID       GetID(const char* str_id_begin, const char* str_id_end);
+	IMGUI_API ImGuiID       GetID(const void* ptr_id);
+
+   // return true if the cursor is over the operation's gizmo
+   IMGUI_API bool IsOver(OPERATION op);
+   IMGUI_API void SetGizmoSizeClipSpace(float value);
+
+   // Allow axis to flip
+   // When true (default), the guizmo axis flip for better visibility
+   // When false, they always stay along the positive world/local axis
+   IMGUI_API void AllowAxisFlip(bool value);
+
+   // Configure the limit where axis are hidden
+   IMGUI_API void SetAxisLimit(float value);
+   // Set an axis mask to permanently hide a given axis (true -> hidden, false -> shown)
+   IMGUI_API void SetAxisMask(bool x, bool y, bool z);
+   // Configure the limit where planes are hiden
+   IMGUI_API void SetPlaneLimit(float value);
+   // from a x,y,z point in space and using Manipulation view/projection matrix, check if mouse is in pixel radius distance of that projected point
+   IMGUI_API bool IsOver(float* position, float pixelRadius);
+
+   enum COLOR
+   {
+      DIRECTION_X,      // directionColor[0]
+      DIRECTION_Y,      // directionColor[1]
+      DIRECTION_Z,      // directionColor[2]
+      PLANE_X,          // planeColor[0]
+      PLANE_Y,          // planeColor[1]
+      PLANE_Z,          // planeColor[2]
+      SELECTION,        // selectionColor
+      INACTIVE,         // inactiveColor
+      TRANSLATION_LINE, // translationLineColor
+      SCALE_LINE,
+      ROTATION_USING_BORDER,
+      ROTATION_USING_FILL,
+      HATCHED_AXIS_LINES,
+      TEXT,
+      TEXT_SHADOW,
+      COUNT
+   };
+
+   struct Style
+   {
+      IMGUI_API Style();
+
+      float TranslationLineThickness;   // Thickness of lines for translation gizmo
+      float TranslationLineArrowSize;   // Size of arrow at the end of lines for translation gizmo
+      float RotationLineThickness;      // Thickness of lines for rotation gizmo
+      float RotationOuterLineThickness; // Thickness of line surrounding the rotation gizmo
+      float ScaleLineThickness;         // Thickness of lines for scale gizmo
+      float ScaleLineCircleSize;        // Size of circle at the end of lines for scale gizmo
+      float HatchedAxisLineThickness;   // Thickness of hatched axis lines
+      float CenterCircleSize;           // Size of circle at the center of the translate/scale gizmo
+
+      ImVec4 Colors[COLOR::COUNT];
+   };
+
+   IMGUI_API Style& GetStyle();
+}

src/ThirdParty/ImGuizmo/ImSequencer.cpp

@@ -0,0 +1,695 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#include "ImSequencer.h"
+#include "imgui.h"
+#include "imgui_internal.h"
+#include <cstdlib>
+
+namespace ImSequencer
+{
+#ifndef IMGUI_DEFINE_MATH_OPERATORS
+   static ImVec2 operator+(const ImVec2& a, const ImVec2& b) {
+      return ImVec2(a.x + b.x, a.y + b.y);
+   }
+#endif
+   static bool SequencerAddDelButton(ImDrawList* draw_list, ImVec2 pos, bool add = true)
+   {
+      ImGuiIO& io = ImGui::GetIO();
+      ImRect btnRect(pos, ImVec2(pos.x + 16, pos.y + 16));
+      bool overBtn = btnRect.Contains(io.MousePos);
+      bool containedClick = overBtn && btnRect.Contains(io.MouseClickedPos[0]);
+      bool clickedBtn = containedClick && io.MouseReleased[0];
+      int btnColor = overBtn ? 0xAAEAFFAA : 0x77A3B2AA;
+      if (containedClick && io.MouseDownDuration[0] > 0)
+         btnRect.Expand(2.0f);
+
+      float midy = pos.y + 16 / 2 - 0.5f;
+      float midx = pos.x + 16 / 2 - 0.5f;
+      draw_list->AddRect(btnRect.Min, btnRect.Max, btnColor, 4);
+      draw_list->AddLine(ImVec2(btnRect.Min.x + 3, midy), ImVec2(btnRect.Max.x - 3, midy), btnColor, 2);
+      if (add)
+         draw_list->AddLine(ImVec2(midx, btnRect.Min.y + 3), ImVec2(midx, btnRect.Max.y - 3), btnColor, 2);
+      return clickedBtn;
+   }
+
+   bool Sequencer(SequenceInterface* sequence, int* currentFrame, bool* expanded, int* selectedEntry, int* firstFrame, int sequenceOptions)
+   {
+      bool ret = false;
+      ImGuiIO& io = ImGui::GetIO();
+      int cx = (int)(io.MousePos.x);
+      int cy = (int)(io.MousePos.y);
+      static float framePixelWidth = 10.f;
+      static float framePixelWidthTarget = 10.f;
+      int legendWidth = 200;
+
+      static int movingEntry = -1;
+      static int movingPos = -1;
+      static int movingPart = -1;
+      int delEntry = -1;
+      int dupEntry = -1;
+      int ItemHeight = 20;
+
+      bool popupOpened = false;
+      int sequenceCount = sequence->GetItemCount();
+      if (!sequenceCount)
+         return false;
+      ImGui::BeginGroup();
+
+      ImDrawList* draw_list = ImGui::GetWindowDrawList();
+      ImVec2 canvas_pos = ImGui::GetCursorScreenPos();            // ImDrawList API uses screen coordinates!
+      ImVec2 canvas_size = ImGui::GetContentRegionAvail();        // Resize canvas to what's available
+      int firstFrameUsed = firstFrame ? *firstFrame : 0;
+
+
+      int controlHeight = sequenceCount * ItemHeight;
+      for (int i = 0; i < sequenceCount; i++)
+         controlHeight += int(sequence->GetCustomHeight(i));
+      int frameCount = ImMax(sequence->GetFrameMax() - sequence->GetFrameMin(), 1);
+
+      static bool MovingScrollBar = false;
+      static bool MovingCurrentFrame = false;
+      struct CustomDraw
+      {
+         int index;
+         ImRect customRect;
+         ImRect legendRect;
+         ImRect clippingRect;
+         ImRect legendClippingRect;
+      };
+      ImVector<CustomDraw> customDraws;
+      ImVector<CustomDraw> compactCustomDraws;
+      // zoom in/out
+      const int visibleFrameCount = (int)floorf((canvas_size.x - legendWidth) / framePixelWidth);
+      const float barWidthRatio = ImMin(visibleFrameCount / (float)frameCount, 1.f);
+      const float barWidthInPixels = barWidthRatio * (canvas_size.x - legendWidth);
+
+      ImRect regionRect(canvas_pos, canvas_pos + canvas_size);
+
+      static bool panningView = false;
+      static ImVec2 panningViewSource;
+      static int panningViewFrame;
+      if (ImGui::IsWindowFocused() && io.KeyAlt && io.MouseDown[2])
+      {
+         if (!panningView)
+         {
+            panningViewSource = io.MousePos;
+            panningView = true;
+            panningViewFrame = *firstFrame;
+         }
+         *firstFrame = panningViewFrame - int((io.MousePos.x - panningViewSource.x) / framePixelWidth);
+         *firstFrame = ImClamp(*firstFrame, sequence->GetFrameMin(), sequence->GetFrameMax() - visibleFrameCount);
+      }
+      if (panningView && !io.MouseDown[2])
+      {
+         panningView = false;
+      }
+      framePixelWidthTarget = ImClamp(framePixelWidthTarget, 0.1f, 50.f);
+
+      framePixelWidth = ImLerp(framePixelWidth, framePixelWidthTarget, 0.33f);
+
+      frameCount = sequence->GetFrameMax() - sequence->GetFrameMin();
+      if (visibleFrameCount >= frameCount && firstFrame)
+         *firstFrame = sequence->GetFrameMin();
+
+
+      // --
+      if (expanded && !*expanded)
+      {
+         ImGui::InvisibleButton("canvas", ImVec2(canvas_size.x - canvas_pos.x, (float)ItemHeight));
+         draw_list->AddRectFilled(canvas_pos, ImVec2(canvas_size.x + canvas_pos.x, canvas_pos.y + ItemHeight), 0xFF3D3837, 0);
+         char tmps[512];
+         ImFormatString(tmps, IM_ARRAYSIZE(tmps), sequence->GetCollapseFmt(), frameCount, sequenceCount);
+         draw_list->AddText(ImVec2(canvas_pos.x + 26, canvas_pos.y + 2), 0xFFFFFFFF, tmps);
+      }
+      else
+      {
+         bool hasScrollBar(true);
+         /*
+         int framesPixelWidth = int(frameCount * framePixelWidth);
+         if ((framesPixelWidth + legendWidth) >= canvas_size.x)
+         {
+             hasScrollBar = true;
+         }
+         */
+         // test scroll area
+         ImVec2 headerSize(canvas_size.x, (float)ItemHeight);
+         ImVec2 scrollBarSize(canvas_size.x, 14.f);
+         ImGui::InvisibleButton("topBar", headerSize);
+         draw_list->AddRectFilled(canvas_pos, canvas_pos + headerSize, 0xFFFF0000, 0);
+         ImVec2 childFramePos = ImGui::GetCursorScreenPos();
+         ImVec2 childFrameSize(canvas_size.x, canvas_size.y - 8.f - headerSize.y - (hasScrollBar ? scrollBarSize.y : 0));
+         ImGui::PushStyleColor(ImGuiCol_FrameBg, 0);
+         ImGui::BeginChild(889, childFrameSize, ImGuiChildFlags_FrameStyle);
+         sequence->focused = ImGui::IsWindowFocused();
+         ImGui::InvisibleButton("contentBar", ImVec2(canvas_size.x, float(controlHeight)));
+         const ImVec2 contentMin = ImGui::GetItemRectMin();
+         const ImVec2 contentMax = ImGui::GetItemRectMax();
+         const ImRect contentRect(contentMin, contentMax);
+         const float contentHeight = contentMax.y - contentMin.y;
+
+         // full background
+         draw_list->AddRectFilled(canvas_pos, canvas_pos + canvas_size, 0xFF242424, 0);
+
+         // current frame top
+         ImRect topRect(ImVec2(canvas_pos.x + legendWidth, canvas_pos.y), ImVec2(canvas_pos.x + canvas_size.x, canvas_pos.y + ItemHeight));
+
+         if (!MovingCurrentFrame && !MovingScrollBar && movingEntry == -1 && sequenceOptions & SEQUENCER_CHANGE_FRAME && currentFrame && *currentFrame >= 0 && topRect.Contains(io.MousePos) && io.MouseDown[0])
+         {
+            MovingCurrentFrame = true;
+         }
+         if (MovingCurrentFrame)
+         {
+            if (frameCount)
+            {
+               *currentFrame = (int)((io.MousePos.x - topRect.Min.x) / framePixelWidth) + firstFrameUsed;
+               if (*currentFrame < sequence->GetFrameMin())
+                  *currentFrame = sequence->GetFrameMin();
+               if (*currentFrame >= sequence->GetFrameMax())
+                  *currentFrame = sequence->GetFrameMax();
+            }
+            if (!io.MouseDown[0])
+               MovingCurrentFrame = false;
+         }
+
+         //header
+         draw_list->AddRectFilled(canvas_pos, ImVec2(canvas_size.x + canvas_pos.x, canvas_pos.y + ItemHeight), 0xFF3D3837, 0);
+         if (sequenceOptions & SEQUENCER_ADD)
+         {
+            if (SequencerAddDelButton(draw_list, ImVec2(canvas_pos.x + legendWidth - ItemHeight, canvas_pos.y + 2), true))
+               ImGui::OpenPopup("addEntry");
+
+            if (ImGui::BeginPopup("addEntry"))
+            {
+               for (int i = 0; i < sequence->GetItemTypeCount(); i++)
+                  if (ImGui::Selectable(sequence->GetItemTypeName(i)))
+                  {
+                     sequence->Add(i);
+                     *selectedEntry = sequence->GetItemCount() - 1;
+                  }
+
+               ImGui::EndPopup();
+               popupOpened = true;
+            }
+         }
+
+         //header frame number and lines
+         int modFrameCount = 10;
+         int frameStep = 1;
+         while ((modFrameCount * framePixelWidth) < 150)
+         {
+            modFrameCount *= 2;
+            frameStep *= 2;
+         };
+         int halfModFrameCount = modFrameCount / 2;
+
+         auto drawLine = [&](int i, int regionHeight) {
+            bool baseIndex = ((i % modFrameCount) == 0) || (i == sequence->GetFrameMax() || i == sequence->GetFrameMin());
+            bool halfIndex = (i % halfModFrameCount) == 0;
+            int px = (int)canvas_pos.x + int(i * framePixelWidth) + legendWidth - int(firstFrameUsed * framePixelWidth);
+            int tiretStart = baseIndex ? 4 : (halfIndex ? 10 : 14);
+            int tiretEnd = baseIndex ? regionHeight : ItemHeight;
+
+            if (px <= (canvas_size.x + canvas_pos.x) && px >= (canvas_pos.x + legendWidth))
+            {
+               draw_list->AddLine(ImVec2((float)px, canvas_pos.y + (float)tiretStart), ImVec2((float)px, canvas_pos.y + (float)tiretEnd - 1), 0xFF606060, 1);
+
+               draw_list->AddLine(ImVec2((float)px, canvas_pos.y + (float)ItemHeight), ImVec2((float)px, canvas_pos.y + (float)regionHeight - 1), 0x30606060, 1);
+            }
+
+            if (baseIndex && px > (canvas_pos.x + legendWidth))
+            {
+               char tmps[512];
+               ImFormatString(tmps, IM_ARRAYSIZE(tmps), "%d", i);
+               draw_list->AddText(ImVec2((float)px + 3.f, canvas_pos.y), 0xFFBBBBBB, tmps);
+            }
+
+         };
+
+         auto drawLineContent = [&](int i, int /*regionHeight*/) {
+            int px = (int)canvas_pos.x + int(i * framePixelWidth) + legendWidth - int(firstFrameUsed * framePixelWidth);
+            int tiretStart = int(contentMin.y);
+            int tiretEnd = int(contentMax.y);
+
+            if (px <= (canvas_size.x + canvas_pos.x) && px >= (canvas_pos.x + legendWidth))
+            {
+               //draw_list->AddLine(ImVec2((float)px, canvas_pos.y + (float)tiretStart), ImVec2((float)px, canvas_pos.y + (float)tiretEnd - 1), 0xFF606060, 1);
+
+               draw_list->AddLine(ImVec2(float(px), float(tiretStart)), ImVec2(float(px), float(tiretEnd)), 0x30606060, 1);
+            }
+         };
+         for (int i = sequence->GetFrameMin(); i <= sequence->GetFrameMax(); i += frameStep)
+         {
+            drawLine(i, ItemHeight);
+         }
+         drawLine(sequence->GetFrameMin(), ItemHeight);
+         drawLine(sequence->GetFrameMax(), ItemHeight);
+         /*
+                  draw_list->AddLine(canvas_pos, ImVec2(canvas_pos.x, canvas_pos.y + controlHeight), 0xFF000000, 1);
+                  draw_list->AddLine(ImVec2(canvas_pos.x, canvas_pos.y + ItemHeight), ImVec2(canvas_size.x, canvas_pos.y + ItemHeight), 0xFF000000, 1);
+                  */
+                  // clip content
+
+         draw_list->PushClipRect(childFramePos, childFramePos + childFrameSize, true);
+
+         // draw item names in the legend rect on the left
+         size_t customHeight = 0;
+         for (int i = 0; i < sequenceCount; i++)
+         {
+            int type;
+            sequence->Get(i, NULL, NULL, &type, NULL);
+            ImVec2 tpos(contentMin.x + 3, contentMin.y + i * ItemHeight + 2 + customHeight);
+            draw_list->AddText(tpos, 0xFFFFFFFF, sequence->GetItemLabel(i));
+
+            if (sequenceOptions & SEQUENCER_DEL)
+            {
+               if (SequencerAddDelButton(draw_list, ImVec2(contentMin.x + legendWidth - ItemHeight + 2 - 10, tpos.y + 2), false))
+                  delEntry = i;
+
+               if (SequencerAddDelButton(draw_list, ImVec2(contentMin.x + legendWidth - ItemHeight - ItemHeight + 2 - 10, tpos.y + 2), true))
+                  dupEntry = i;
+            }
+            customHeight += sequence->GetCustomHeight(i);
+         }
+
+         // slots background
+         customHeight = 0;
+         for (int i = 0; i < sequenceCount; i++)
+         {
+            unsigned int col = (i & 1) ? 0xFF3A3636 : 0xFF413D3D;
+
+            size_t localCustomHeight = sequence->GetCustomHeight(i);
+            ImVec2 pos = ImVec2(contentMin.x + legendWidth, contentMin.y + ItemHeight * i + 1 + customHeight);
+            ImVec2 sz = ImVec2(canvas_size.x + canvas_pos.x, pos.y + ItemHeight - 1 + localCustomHeight);
+            if (!popupOpened && cy >= pos.y && cy < pos.y + (ItemHeight + localCustomHeight) && movingEntry == -1 && cx>contentMin.x && cx < contentMin.x + canvas_size.x)
+            {
+               col += 0x80201008;
+               pos.x -= legendWidth;
+            }
+            draw_list->AddRectFilled(pos, sz, col, 0);
+            customHeight += localCustomHeight;
+         }
+
+         draw_list->PushClipRect(childFramePos + ImVec2(float(legendWidth), 0.f), childFramePos + childFrameSize, true);
+
+         // vertical frame lines in content area
+         for (int i = sequence->GetFrameMin(); i <= sequence->GetFrameMax(); i += frameStep)
+         {
+            drawLineContent(i, int(contentHeight));
+         }
+         drawLineContent(sequence->GetFrameMin(), int(contentHeight));
+         drawLineContent(sequence->GetFrameMax(), int(contentHeight));
+
+         // selection
+         bool selected = selectedEntry && (*selectedEntry >= 0);
+         if (selected)
+         {
+            customHeight = 0;
+            for (int i = 0; i < *selectedEntry; i++)
+               customHeight += sequence->GetCustomHeight(i);
+            draw_list->AddRectFilled(ImVec2(contentMin.x, contentMin.y + ItemHeight * *selectedEntry + customHeight), ImVec2(contentMin.x + canvas_size.x, contentMin.y + ItemHeight * (*selectedEntry + 1) + customHeight), 0x801080FF, 1.f);
+         }
+
+         // slots
+         customHeight = 0;
+         for (int i = 0; i < sequenceCount; i++)
+         {
+            int* start, * end;
+            unsigned int color;
+            sequence->Get(i, &start, &end, NULL, &color);
+            size_t localCustomHeight = sequence->GetCustomHeight(i);
+
+            ImVec2 pos = ImVec2(contentMin.x + legendWidth - firstFrameUsed * framePixelWidth, contentMin.y + ItemHeight * i + 1 + customHeight);
+            ImVec2 slotP1(pos.x + *start * framePixelWidth, pos.y + 2);
+            ImVec2 slotP2(pos.x + *end * framePixelWidth + framePixelWidth, pos.y + ItemHeight - 2);
+            ImVec2 slotP3(pos.x + *end * framePixelWidth + framePixelWidth, pos.y + ItemHeight - 2 + localCustomHeight);
+            unsigned int slotColor = color | 0xFF000000;
+            unsigned int slotColorHalf = (color & 0xFFFFFF) | 0x40000000;
+
+            if (slotP1.x <= (canvas_size.x + contentMin.x) && slotP2.x >= (contentMin.x + legendWidth))
+            {
+               draw_list->AddRectFilled(slotP1, slotP3, slotColorHalf, 2);
+               draw_list->AddRectFilled(slotP1, slotP2, slotColor, 2);
+            }
+            if (ImRect(slotP1, slotP2).Contains(io.MousePos) && io.MouseDoubleClicked[0])
+            {
+               sequence->DoubleClick(i);
+            }
+            // Ensure grabbable handles
+            const float max_handle_width = slotP2.x - slotP1.x / 3.0f;
+            const float min_handle_width = ImMin(10.0f, max_handle_width);
+            const float handle_width = ImClamp(framePixelWidth / 2.0f, min_handle_width, max_handle_width);
+            ImRect rects[3] = { ImRect(slotP1, ImVec2(slotP1.x + handle_width, slotP2.y))
+                , ImRect(ImVec2(slotP2.x - handle_width, slotP1.y), slotP2)
+                , ImRect(slotP1, slotP2) };
+
+            const unsigned int quadColor[] = { 0xFFFFFFFF, 0xFFFFFFFF, slotColor + (selected ? 0 : 0x202020) };
+            if (movingEntry == -1 && (sequenceOptions & SEQUENCER_EDIT_STARTEND))// TODOFOCUS && backgroundRect.Contains(io.MousePos))
+            {
+               for (int j = 2; j >= 0; j--)
+               {
+                  ImRect& rc = rects[j];
+                  if (!rc.Contains(io.MousePos))
+                     continue;
+                  draw_list->AddRectFilled(rc.Min, rc.Max, quadColor[j], 2);
+               }
+
+               for (int j = 0; j < 3; j++)
+               {
+                  ImRect& rc = rects[j];
+                  if (!rc.Contains(io.MousePos))
+                     continue;
+                  if (!ImRect(childFramePos, childFramePos + childFrameSize).Contains(io.MousePos))
+                     continue;
+                  if (ImGui::IsMouseClicked(0) && !MovingScrollBar && !MovingCurrentFrame)
+                  {
+                     movingEntry = i;
+                     movingPos = cx;
+                     movingPart = j + 1;
+                     sequence->BeginEdit(movingEntry);
+                     break;
+                  }
+               }
+            }
+
+            // custom draw
+            if (localCustomHeight > 0)
+            {
+               ImVec2 rp(canvas_pos.x, contentMin.y + ItemHeight * i + 1 + customHeight);
+               ImRect customRect(rp + ImVec2(legendWidth - (firstFrameUsed - sequence->GetFrameMin() - 0.5f) * framePixelWidth, float(ItemHeight)),
+                  rp + ImVec2(legendWidth + (sequence->GetFrameMax() - firstFrameUsed - 0.5f + 2.f) * framePixelWidth, float(localCustomHeight + ItemHeight)));
+               ImRect clippingRect(rp + ImVec2(float(legendWidth), float(ItemHeight)), rp + ImVec2(canvas_size.x, float(localCustomHeight + ItemHeight)));
+
+               ImRect legendRect(rp + ImVec2(0.f, float(ItemHeight)), rp + ImVec2(float(legendWidth), float(localCustomHeight)));
+               ImRect legendClippingRect(canvas_pos + ImVec2(0.f, float(ItemHeight)), canvas_pos + ImVec2(float(legendWidth), float(localCustomHeight + ItemHeight)));
+               customDraws.push_back({ i, customRect, legendRect, clippingRect, legendClippingRect });
+            }
+            else
+            {
+               ImVec2 rp(canvas_pos.x, contentMin.y + ItemHeight * i + customHeight);
+               ImRect customRect(rp + ImVec2(legendWidth - (firstFrameUsed - sequence->GetFrameMin() - 0.5f) * framePixelWidth, float(0.f)),
+                  rp + ImVec2(legendWidth + (sequence->GetFrameMax() - firstFrameUsed - 0.5f + 2.f) * framePixelWidth, float(ItemHeight)));
+               ImRect clippingRect(rp + ImVec2(float(legendWidth), float(0.f)), rp + ImVec2(canvas_size.x, float(ItemHeight)));
+
+               compactCustomDraws.push_back({ i, customRect, ImRect(), clippingRect, ImRect() });
+            }
+            customHeight += localCustomHeight;
+         }
+
+
+         // moving
+         if (/*backgroundRect.Contains(io.MousePos) && */movingEntry >= 0)
+         {
+#if IMGUI_VERSION_NUM >= 18723
+            ImGui::SetNextFrameWantCaptureMouse(true);
+#else
+            ImGui::CaptureMouseFromApp();
+#endif
+            int diffFrame = int((cx - movingPos) / framePixelWidth);
+            if (std::abs(diffFrame) > 0)
+            {
+               int* start, * end;
+               sequence->Get(movingEntry, &start, &end, NULL, NULL);
+               if (selectedEntry)
+                  *selectedEntry = movingEntry;
+               int& l = *start;
+               int& r = *end;
+               if (movingPart & 1)
+                  l += diffFrame;
+               if (movingPart & 2)
+                  r += diffFrame;
+               if (l < 0)
+               {
+                  if (movingPart & 2)
+                     r -= l;
+                  l = 0;
+               }
+               if (movingPart & 1 && l > r)
+                  l = r;
+               if (movingPart & 2 && r < l)
+                  r = l;
+               movingPos += int(diffFrame * framePixelWidth);
+            }
+            if (!io.MouseDown[0])
+            {
+               // single select
+               if (!diffFrame && movingPart && selectedEntry)
+               {
+                  *selectedEntry = movingEntry;
+                  ret = true;
+               }
+
+               movingEntry = -1;
+               sequence->EndEdit();
+            }
+         }
+
+         // cursor
+         if (currentFrame && firstFrame && *currentFrame >= *firstFrame && *currentFrame <= sequence->GetFrameMax())
+         {
+            static const float cursorWidth = 8.f;
+            float cursorOffset = contentMin.x + legendWidth + (*currentFrame - firstFrameUsed) * framePixelWidth + framePixelWidth / 2 - cursorWidth * 0.5f;
+            draw_list->AddLine(ImVec2(cursorOffset, canvas_pos.y), ImVec2(cursorOffset, contentMax.y), 0xA02A2AFF, cursorWidth);
+            char tmps[512];
+            ImFormatString(tmps, IM_ARRAYSIZE(tmps), "%d", *currentFrame);
+            draw_list->AddText(ImVec2(cursorOffset + 10, canvas_pos.y + 2), 0xFF2A2AFF, tmps);
+         }
+
+         draw_list->PopClipRect();
+         draw_list->PopClipRect();
+
+         for (auto& customDraw : customDraws)
+            sequence->CustomDraw(customDraw.index, draw_list, customDraw.customRect, customDraw.legendRect, customDraw.clippingRect, customDraw.legendClippingRect);
+         for (auto& customDraw : compactCustomDraws)
+            sequence->CustomDrawCompact(customDraw.index, draw_list, customDraw.customRect, customDraw.clippingRect);
+
+         // copy paste
+         if (sequenceOptions & SEQUENCER_COPYPASTE)
+         {
+            ImRect rectCopy(ImVec2(contentMin.x + 100, canvas_pos.y + 2)
+               , ImVec2(contentMin.x + 100 + 30, canvas_pos.y + ItemHeight - 2));
+            bool inRectCopy = rectCopy.Contains(io.MousePos);
+            unsigned int copyColor = inRectCopy ? 0xFF1080FF : 0xFF000000;
+            draw_list->AddText(rectCopy.Min, copyColor, "Copy");
+
+            ImRect rectPaste(ImVec2(contentMin.x + 140, canvas_pos.y + 2)
+               , ImVec2(contentMin.x + 140 + 30, canvas_pos.y + ItemHeight - 2));
+            bool inRectPaste = rectPaste.Contains(io.MousePos);
+            unsigned int pasteColor = inRectPaste ? 0xFF1080FF : 0xFF000000;
+            draw_list->AddText(rectPaste.Min, pasteColor, "Paste");
+
+            if (inRectCopy && io.MouseReleased[0])
+            {
+               sequence->Copy();
+            }
+            if (inRectPaste && io.MouseReleased[0])
+            {
+               sequence->Paste();
+            }
+         }
+         //
+
+         ImGui::EndChild();
+         ImGui::PopStyleColor();
+         if (hasScrollBar)
+         {
+            ImGui::InvisibleButton("scrollBar", scrollBarSize);
+            ImVec2 scrollBarMin = ImGui::GetItemRectMin();
+            ImVec2 scrollBarMax = ImGui::GetItemRectMax();
+
+            // ratio = number of frames visible in control / number to total frames
+
+            float startFrameOffset = ((float)(firstFrameUsed - sequence->GetFrameMin()) / (float)frameCount) * (canvas_size.x - legendWidth);
+            ImVec2 scrollBarA(scrollBarMin.x + legendWidth, scrollBarMin.y - 2);
+            ImVec2 scrollBarB(scrollBarMin.x + canvas_size.x, scrollBarMax.y - 1);
+            draw_list->AddRectFilled(scrollBarA, scrollBarB, 0xFF222222, 0);
+
+            ImRect scrollBarRect(scrollBarA, scrollBarB);
+            bool inScrollBar = scrollBarRect.Contains(io.MousePos);
+
+            draw_list->AddRectFilled(scrollBarA, scrollBarB, 0xFF101010, 8);
+
+
+            ImVec2 scrollBarC(scrollBarMin.x + legendWidth + startFrameOffset, scrollBarMin.y);
+            ImVec2 scrollBarD(scrollBarMin.x + legendWidth + barWidthInPixels + startFrameOffset, scrollBarMax.y - 2);
+            draw_list->AddRectFilled(scrollBarC, scrollBarD, (inScrollBar || MovingScrollBar) ? 0xFF606060 : 0xFF505050, 6);
+
+            ImRect barHandleLeft(scrollBarC, ImVec2(scrollBarC.x + 14, scrollBarD.y));
+            ImRect barHandleRight(ImVec2(scrollBarD.x - 14, scrollBarC.y), scrollBarD);
+
+            bool onLeft = barHandleLeft.Contains(io.MousePos);
+            bool onRight = barHandleRight.Contains(io.MousePos);
+
+            static bool sizingRBar = false;
+            static bool sizingLBar = false;
+
+            draw_list->AddRectFilled(barHandleLeft.Min, barHandleLeft.Max, (onLeft || sizingLBar) ? 0xFFAAAAAA : 0xFF666666, 6);
+            draw_list->AddRectFilled(barHandleRight.Min, barHandleRight.Max, (onRight || sizingRBar) ? 0xFFAAAAAA : 0xFF666666, 6);
+
+            ImRect scrollBarThumb(scrollBarC, scrollBarD);
+            static const float MinBarWidth = 44.f;
+            if (sizingRBar)
+            {
+               if (!io.MouseDown[0])
+               {
+                  sizingRBar = false;
+               }
+               else
+               {
+                  float barNewWidth = ImMax(barWidthInPixels + io.MouseDelta.x, MinBarWidth);
+                  float barRatio = barNewWidth / barWidthInPixels;
+                  framePixelWidthTarget = framePixelWidth = framePixelWidth / barRatio;
+                  int newVisibleFrameCount = int((canvas_size.x - legendWidth) / framePixelWidthTarget);
+                  int lastFrame = *firstFrame + newVisibleFrameCount;
+                  if (lastFrame > sequence->GetFrameMax())
+                  {
+                     framePixelWidthTarget = framePixelWidth = (canvas_size.x - legendWidth) / float(sequence->GetFrameMax() - *firstFrame);
+                  }
+               }
+            }
+            else if (sizingLBar)
+            {
+               if (!io.MouseDown[0])
+               {
+                  sizingLBar = false;
+               }
+               else
+               {
+                  if (fabsf(io.MouseDelta.x) > FLT_EPSILON)
+                  {
+                     float barNewWidth = ImMax(barWidthInPixels - io.MouseDelta.x, MinBarWidth);
+                     float barRatio = barNewWidth / barWidthInPixels;
+                     float previousFramePixelWidthTarget = framePixelWidthTarget;
+                     framePixelWidthTarget = framePixelWidth = framePixelWidth / barRatio;
+                     int newVisibleFrameCount = int(visibleFrameCount / barRatio);
+                     int newFirstFrame = *firstFrame + newVisibleFrameCount - visibleFrameCount;
+                     newFirstFrame = ImClamp(newFirstFrame, sequence->GetFrameMin(), ImMax(sequence->GetFrameMax() - visibleFrameCount, sequence->GetFrameMin()));
+                     if (newFirstFrame == *firstFrame)
+                     {
+                        framePixelWidth = framePixelWidthTarget = previousFramePixelWidthTarget;
+                     }
+                     else
+                     {
+                        *firstFrame = newFirstFrame;
+                     }
+                  }
+               }
+            }
+            else
+            {
+               if (MovingScrollBar)
+               {
+                  if (!io.MouseDown[0])
+                  {
+                     MovingScrollBar = false;
+                  }
+                  else
+                  {
+                     float framesPerPixelInBar = barWidthInPixels / (float)visibleFrameCount;
+                     *firstFrame = int((io.MousePos.x - panningViewSource.x) / framesPerPixelInBar) - panningViewFrame;
+                     *firstFrame = ImClamp(*firstFrame, sequence->GetFrameMin(), ImMax(sequence->GetFrameMax() - visibleFrameCount, sequence->GetFrameMin()));
+                  }
+               }
+               else
+               {
+                  if (scrollBarThumb.Contains(io.MousePos) && ImGui::IsMouseClicked(0) && firstFrame && !MovingCurrentFrame && movingEntry == -1)
+                  {
+                     MovingScrollBar = true;
+                     panningViewSource = io.MousePos;
+                     panningViewFrame = -*firstFrame;
+                  }
+                  if (!sizingRBar && onRight && ImGui::IsMouseClicked(0))
+                     sizingRBar = true;
+                  if (!sizingLBar && onLeft && ImGui::IsMouseClicked(0))
+                     sizingLBar = true;
+
+               }
+            }
+         }
+      }
+
+      ImGui::EndGroup();
+
+      if (regionRect.Contains(io.MousePos))
+      {
+         bool overCustomDraw = false;
+         for (auto& custom : customDraws)
+         {
+            if (custom.customRect.Contains(io.MousePos))
+            {
+               overCustomDraw = true;
+            }
+         }
+         if (overCustomDraw)
+         {
+         }
+         else
+         {
+#if 0
+            frameOverCursor = *firstFrame + (int)(visibleFrameCount * ((io.MousePos.x - (float)legendWidth - canvas_pos.x) / (canvas_size.x - legendWidth)));
+            //frameOverCursor = max(min(*firstFrame - visibleFrameCount / 2, frameCount - visibleFrameCount), 0);
+
+            /**firstFrame -= frameOverCursor;
+            *firstFrame *= framePixelWidthTarget / framePixelWidth;
+            *firstFrame += frameOverCursor;*/
+            if (io.MouseWheel < -FLT_EPSILON)
+            {
+               *firstFrame -= frameOverCursor;
+               *firstFrame = int(*firstFrame * 1.1f);
+               framePixelWidthTarget *= 0.9f;
+               *firstFrame += frameOverCursor;
+            }
+
+            if (io.MouseWheel > FLT_EPSILON)
+            {
+               *firstFrame -= frameOverCursor;
+               *firstFrame = int(*firstFrame * 0.9f);
+               framePixelWidthTarget *= 1.1f;
+               *firstFrame += frameOverCursor;
+            }
+#endif
+         }
+      }
+
+      if (expanded)
+      {
+         if (SequencerAddDelButton(draw_list, ImVec2(canvas_pos.x + 2, canvas_pos.y + 2), !*expanded))
+            *expanded = !*expanded;
+      }
+
+      if (delEntry != -1)
+      {
+         sequence->Del(delEntry);
+         if (selectedEntry && (*selectedEntry == delEntry || *selectedEntry >= sequence->GetItemCount()))
+            *selectedEntry = -1;
+      }
+
+      if (dupEntry != -1)
+      {
+         sequence->Duplicate(dupEntry);
+      }
+      return ret;
+   }
+}

src/ThirdParty/ImGuizmo/ImSequencer.h

@@ -0,0 +1,79 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+
+#include <cstddef>
+
+struct ImDrawList;
+struct ImRect;
+namespace ImSequencer
+{
+   enum SEQUENCER_OPTIONS
+   {
+      SEQUENCER_EDIT_NONE = 0,
+      SEQUENCER_EDIT_STARTEND = 1 << 1,
+      SEQUENCER_CHANGE_FRAME = 1 << 3,
+      SEQUENCER_ADD = 1 << 4,
+      SEQUENCER_DEL = 1 << 5,
+      SEQUENCER_COPYPASTE = 1 << 6,
+      SEQUENCER_EDIT_ALL = SEQUENCER_EDIT_STARTEND | SEQUENCER_CHANGE_FRAME
+   };
+
+   struct SequenceInterface
+   {
+      bool focused = false;
+      virtual int GetFrameMin() const = 0;
+      virtual int GetFrameMax() const = 0;
+      virtual int GetItemCount() const = 0;
+
+      virtual void BeginEdit(int /*index*/) {}
+      virtual void EndEdit() {}
+      virtual int GetItemTypeCount() const { return 0; }
+      virtual const char* GetItemTypeName(int /*typeIndex*/) const { return ""; }
+      virtual const char* GetItemLabel(int /*index*/) const { return ""; }
+      virtual const char* GetCollapseFmt() const { return "%d Frames / %d entries"; }
+
+      virtual void Get(int index, int** start, int** end, int* type, unsigned int* color) = 0;
+      virtual void Add(int /*type*/) {}
+      virtual void Del(int /*index*/) {}
+      virtual void Duplicate(int /*index*/) {}
+
+      virtual void Copy() {}
+      virtual void Paste() {}
+
+      virtual size_t GetCustomHeight(int /*index*/) { return 0; }
+      virtual void DoubleClick(int /*index*/) {}
+      virtual void CustomDraw(int /*index*/, ImDrawList* /*draw_list*/, const ImRect& /*rc*/, const ImRect& /*legendRect*/, const ImRect& /*clippingRect*/, const ImRect& /*legendClippingRect*/) {}
+      virtual void CustomDrawCompact(int /*index*/, ImDrawList* /*draw_list*/, const ImRect& /*rc*/, const ImRect& /*clippingRect*/) {}
+
+       virtual ~SequenceInterface() = default;
+   };
+
+
+   // return true if selection is made
+   bool Sequencer(SequenceInterface* sequence, int* currentFrame, bool* expanded, int* selectedEntry, int* firstFrame, int sequenceOptions);
+
+}

src/ThirdParty/ImGuizmo/ImZoomSlider.h

@@ -0,0 +1,245 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+
+namespace ImZoomSlider
+{
+   typedef int ImGuiZoomSliderFlags;
+   enum ImGuiPopupFlags_
+   {
+      ImGuiZoomSliderFlags_None = 0,
+      ImGuiZoomSliderFlags_Vertical = 1,
+      ImGuiZoomSliderFlags_NoAnchors = 2,
+      ImGuiZoomSliderFlags_NoMiddleCarets = 4,
+      ImGuiZoomSliderFlags_NoWheel = 8,
+   };
+
+   template<typename T> bool ImZoomSlider(const T lower, const T higher, T& viewLower, T& viewHigher, float wheelRatio = 0.01f, ImGuiZoomSliderFlags flags = ImGuiZoomSliderFlags_None)
+   {
+      bool interacted = false;
+      ImGuiIO& io = ImGui::GetIO();
+      ImDrawList* draw_list = ImGui::GetWindowDrawList();
+
+      static const float handleSize = 12;
+      static const float roundRadius = 3.f;
+      static const char* controlName = "ImZoomSlider";
+
+      static bool movingScrollBarSvg = false;
+      static bool sizingRBarSvg = false;
+      static bool sizingLBarSvg = false;
+      static ImGuiID editingId = (ImGuiID)-1;
+      static float scrollingSource = 0.f;
+      static float saveViewLower;
+      static float saveViewHigher;
+
+      const bool isVertical = flags & ImGuiZoomSliderFlags_Vertical;
+      const ImVec2 canvasPos = ImGui::GetCursorScreenPos();
+      const ImVec2 canvasSize = ImGui::GetContentRegionAvail();
+      const float canvasSizeLength = isVertical ? ImGui::GetItemRectSize().y : canvasSize.x;
+      const ImVec2 scrollBarSize = isVertical ? ImVec2(14.f, canvasSizeLength) : ImVec2(canvasSizeLength, 14.f);
+
+      ImGui::InvisibleButton(controlName, scrollBarSize);
+      const ImGuiID currentId = ImGui::GetID(controlName);
+
+      const bool usingEditingId = currentId == editingId;
+      const bool canUseControl = usingEditingId || editingId == -1;
+      const bool movingScrollBar = usingEditingId ? movingScrollBarSvg : false;
+      const bool sizingRBar = usingEditingId ? sizingRBarSvg : false;
+      const bool sizingLBar = usingEditingId ? sizingLBarSvg : false;
+      const int componentIndex = isVertical ? 1 : 0;
+      const ImVec2 scrollBarMin = ImGui::GetItemRectMin();
+      const ImVec2 scrollBarMax = ImGui::GetItemRectMax();
+      const ImVec2 scrollBarA = ImVec2(scrollBarMin.x, scrollBarMin.y) - (isVertical ? ImVec2(2,0) : ImVec2(0,2));
+      const ImVec2 scrollBarB = isVertical ? ImVec2(scrollBarMax.x - 1.f, scrollBarMin.y + canvasSizeLength) : ImVec2(scrollBarMin.x + canvasSizeLength, scrollBarMax.y - 1.f);
+      const float scrollStart = ((viewLower - lower) / (higher - lower)) * canvasSizeLength + scrollBarMin[componentIndex];
+      const float scrollEnd = ((viewHigher - lower) / (higher - lower)) * canvasSizeLength + scrollBarMin[componentIndex];
+      const float screenSize = scrollEnd - scrollStart;
+      const ImVec2 scrollTopLeft = isVertical ? ImVec2(scrollBarMin.x, scrollStart) : ImVec2(scrollStart, scrollBarMin.y);
+      const ImVec2 scrollBottomRight = isVertical ? ImVec2(scrollBarMax.x - 2.f, scrollEnd) : ImVec2(scrollEnd, scrollBarMax.y - 2.f);
+      const bool inScrollBar = canUseControl && ImRect(scrollTopLeft, scrollBottomRight).Contains(io.MousePos);
+      const ImRect scrollBarRect(scrollBarA, scrollBarB);
+      const float deltaScreen = io.MousePos[componentIndex] - scrollingSource;
+      const float deltaView = ((higher - lower) / canvasSizeLength) * deltaScreen;
+      const uint32_t barColor = ImGui::GetColorU32((inScrollBar || movingScrollBar) ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
+      const float middleCoord = (scrollStart + scrollEnd) * 0.5f;
+      const bool insideControl = canUseControl && ImRect(scrollBarMin, scrollBarMax).Contains(io.MousePos);
+      const bool hasAnchors = !(flags & ImGuiZoomSliderFlags_NoAnchors);
+      const float viewMinSize = ((3.f * handleSize) / canvasSizeLength) * (higher - lower);
+      const auto ClipView = [lower, higher, &viewLower, &viewHigher]() {
+         if (viewLower < lower)
+         {
+            const float deltaClip = lower - viewLower;
+            viewLower += deltaClip;
+            viewHigher += deltaClip;
+         }
+         if (viewHigher > higher)
+         {
+            const float deltaClip = viewHigher - higher;
+            viewLower -= deltaClip;
+            viewHigher -= deltaClip;
+         }
+      };
+
+      bool onLeft = false;
+      bool onRight = false;
+
+      draw_list->AddRectFilled(scrollBarA, scrollBarB, 0xFF101010, roundRadius);
+      draw_list->AddRectFilled(scrollBarA, scrollBarB, 0xFF222222, 0);
+      draw_list->AddRectFilled(scrollTopLeft, scrollBottomRight, barColor, roundRadius);
+
+      if (!(flags & ImGuiZoomSliderFlags_NoMiddleCarets))
+      {
+         for (float i = 0.5f; i < 3.f; i += 1.f)
+         {
+            const float coordA = middleCoord - handleSize * 0.5f;
+            const float coordB = middleCoord + handleSize * 0.5f;
+            ImVec2 base = scrollBarMin;
+            base.x += scrollBarSize.x * 0.25f * i;
+            base.y += scrollBarSize.y * 0.25f * i;
+
+            if (isVertical)
+            {
+               draw_list->AddLine(ImVec2(base.x, coordA), ImVec2(base.x, coordB), ImGui::GetColorU32(ImGuiCol_SliderGrab));
+            }
+            else
+            {
+               draw_list->AddLine(ImVec2(coordA, base.y), ImVec2(coordB, base.y), ImGui::GetColorU32(ImGuiCol_SliderGrab));
+            }
+         }
+      }
+
+      // Mouse wheel
+      if (io.MouseClicked[0] && insideControl && !inScrollBar)
+      {
+         const float ratio = (io.MousePos[componentIndex] - scrollBarMin[componentIndex]) / (scrollBarMax[componentIndex] - scrollBarMin[componentIndex]);
+         const float size = (higher - lower);
+         const float halfViewSize = (viewHigher - viewLower) * 0.5f;
+         const float middle = ratio * size + lower;
+         viewLower = middle - halfViewSize;
+         viewHigher = middle + halfViewSize;
+         ClipView();
+         interacted = true;
+      }
+
+      if (!(flags & ImGuiZoomSliderFlags_NoWheel) && inScrollBar && fabsf(io.MouseWheel) > 0.f)
+      {
+         const float ratio = (io.MousePos[componentIndex] - scrollStart) / (scrollEnd - scrollStart);
+         const float amount = io.MouseWheel * wheelRatio * (viewHigher - viewLower);
+         
+         viewLower -= ratio * amount;
+         viewHigher += (1.f - ratio) * amount;
+         ClipView();
+         interacted = true;
+      }
+
+      if (screenSize > handleSize * 2.f && hasAnchors)
+      {
+         const ImRect barHandleLeft(scrollTopLeft, isVertical ? ImVec2(scrollBottomRight.x, scrollTopLeft.y + handleSize) : ImVec2(scrollTopLeft.x + handleSize, scrollBottomRight.y));
+         const ImRect barHandleRight(isVertical ? ImVec2(scrollTopLeft.x, scrollBottomRight.y - handleSize) : ImVec2(scrollBottomRight.x - handleSize, scrollTopLeft.y), scrollBottomRight);
+
+         onLeft = barHandleLeft.Contains(io.MousePos);
+         onRight = barHandleRight.Contains(io.MousePos);
+
+         draw_list->AddRectFilled(barHandleLeft.Min, barHandleLeft.Max, ImGui::GetColorU32((onLeft || sizingLBar) ? ImGuiCol_SliderGrabActive : ImGuiCol_SliderGrab), roundRadius);
+         draw_list->AddRectFilled(barHandleRight.Min, barHandleRight.Max, ImGui::GetColorU32((onRight || sizingRBar) ? ImGuiCol_SliderGrabActive : ImGuiCol_SliderGrab), roundRadius);
+      }
+
+      if (sizingRBar)
+      {
+         if (!io.MouseDown[0])
+         {
+            sizingRBarSvg = false;
+            editingId = (ImGuiID)-1;
+         }
+         else
+         {
+            viewHigher = ImMin(saveViewHigher + deltaView, higher);
+         }
+      }
+      else if (sizingLBar)
+      {
+         if (!io.MouseDown[0])
+         {
+            sizingLBarSvg = false;
+            editingId = (ImGuiID)-1;
+         }
+         else
+         {
+            viewLower = ImMax(saveViewLower + deltaView, lower);
+         }
+      }
+      else
+      {
+         if (movingScrollBar)
+         {
+            if (!io.MouseDown[0])
+            {
+               movingScrollBarSvg = false;
+               editingId = (ImGuiID)-1;
+            }
+            else
+            {
+               viewLower = saveViewLower + deltaView;
+               viewHigher = saveViewHigher + deltaView;
+               ClipView();
+            }
+         }
+         else
+         {
+            if (inScrollBar && ImGui::IsMouseClicked(0))
+            {
+               movingScrollBarSvg = true;
+               scrollingSource = io.MousePos[componentIndex];
+               saveViewLower = viewLower;
+               saveViewHigher = viewHigher;
+               editingId = currentId;
+            }
+            if (!sizingRBar && onRight && ImGui::IsMouseClicked(0) && hasAnchors)
+            {
+               sizingRBarSvg = true;
+               editingId = currentId;
+            }
+            if (!sizingLBar && onLeft && ImGui::IsMouseClicked(0) && hasAnchors)
+            {
+               sizingLBarSvg = true;
+               editingId = currentId;
+            }
+         }
+      }
+
+      // minimal size check
+      if ((viewHigher - viewLower) < viewMinSize)
+      {
+         const float middle = (viewLower + viewHigher) * 0.5f;
+         viewLower = middle - viewMinSize * 0.5f;
+         viewHigher = middle + viewMinSize * 0.5f;
+         ClipView();
+      }
+
+      return movingScrollBar || sizingRBar || sizingLBar || interacted;
+   }
+
+} // namespace

src/ThirdParty/ImGuizmo/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Cedric Guillemet
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/ThirdParty/ImGuizmo/Makefile

@@ -0,0 +1,19 @@
+CXXFLAGS=-std=c++11
+CPPFLAGS=-I. -Iexample
+
+LIB_OBJS = ImGuizmo.o GraphEditor.o ImCurveEdit.o ImGradient.o ImSequencer.o
+EXAMPLE_OBJS = example/imgui.o example/imgui_draw.o example/imgui_tables.o example/imgui_widgets.o example/main.o
+
+EXAMPLE_NAME = example.exe
+LDFLAGS=-mwindows -static-libgcc -static-libstdc++
+LIBS=-limm32 -lopengl32 -lgdi32
+
+$(EXAMPLE_NAME): $(LIB_OBJS) $(EXAMPLE_OBJS)
+	$(CXX) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+example/main.o: CXXFLAGS := -std=c++17
+
+clean:
+	$(RM) $(LIB_OBJS)
+	$(RM) $(EXAMPLE_OBJS)
+	$(RM) $(EXAMPLE_NAME)

src/ThirdParty/ImGuizmo/README.md

@@ -0,0 +1,194 @@
+# ImGuizmo
+
+Latest stable tagged version is 1.83. Current master version is 1.84 WIP.
+
+What started with the gizmo is now a collection of dear imgui widgets and more advanced controls.
+
+## Guizmos
+
+### ImViewGizmo
+
+Manipulate view orientation with 1 single line of code
+
+![Image of ImViewGizmo](http://i.imgur.com/7UVcyDd.gif)
+
+### ImGuizmo
+
+ImGuizmo is a small (.h and .cpp) library built ontop of Dear ImGui that allow you to manipulate(Rotate & translate at the moment) 4x4 float matrices. No other dependancies. Coded with Immediate Mode (IM) philosophy in mind.
+
+Built against DearImgui 1.53WIP
+
+![Image of Rotation](http://i.imgur.com/y4mcVoT.gif)
+![Image of Translation](http://i.imgur.com/o8q8iHq.gif)
+![Image of Bounds](http://i.imgur.com/3Ez5LBr.gif)
+
+There is now a sample for Win32/OpenGL ! With a binary in bin directory.
+![Image of Sample](https://i.imgur.com/nXlzyqD.png)
+
+### ImSequencer
+
+A WIP little sequencer used to edit frame start/end for different events in a timeline.
+![Image of Rotation](http://i.imgur.com/BeyNwCn.png)
+Check the sample for the documentation. More to come...
+
+### Graph Editor
+
+Nodes + connections. Custom draw inside nodes is possible with the delegate system in place.
+![Image of GraphEditor](Images/nodeeditor.jpg)
+
+### API doc
+
+Call BeginFrame right after ImGui_XXXX_NewFrame();
+
+```C++
+void BeginFrame();
+```
+
+return true if mouse cursor is over any gizmo control (axis, plan or screen component)
+
+```C++
+bool IsOver();**
+```
+
+return true if mouse IsOver or if the gizmo is in moving state
+
+```C++
+bool IsUsing();**
+```
+
+enable/disable the gizmo. Stay in the state until next call to Enable. gizmo is rendered with gray half transparent color when disabled
+
+```C++
+void Enable(bool enable);**
+```
+
+helper functions for manualy editing translation/rotation/scale with an input float
+translation, rotation and scale float points to 3 floats each
+Angles are in degrees (more suitable for human editing)
+example:
+
+```C++
+ float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+ ImGuizmo::DecomposeMatrixToComponents(gizmoMatrix.m16, matrixTranslation, matrixRotation, matrixScale);
+ ImGui::InputFloat3("Tr", matrixTranslation, 3);
+ ImGui::InputFloat3("Rt", matrixRotation, 3);
+ ImGui::InputFloat3("Sc", matrixScale, 3);
+ ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, gizmoMatrix.m16);
+```
+
+These functions have some numerical stability issues for now. Use with caution.
+
+```C++
+void DecomposeMatrixToComponents(const float *matrix, float *translation, float *rotation, float *scale);
+void RecomposeMatrixFromComponents(const float *translation, const float *rotation, const float *scale, float *matrix);**
+```
+
+Render a cube with face color corresponding to face normal. Usefull for debug/test
+
+```C++
+void DrawCube(const float *view, const float *projection, float *matrix);**
+```
+
+Call it when you want a gizmo
+Needs view and projection matrices.
+Matrix parameter is the source matrix (where will be gizmo be drawn) and might be transformed by the function. Return deltaMatrix is optional. snap points to a float[3] for translation and to a single float for scale or rotation. Snap angle is in Euler Degrees.
+
+```C++
+    enum OPERATION
+    {
+        TRANSLATE,
+        ROTATE,
+        SCALE
+    };
+
+    enum MODE
+    {
+        LOCAL,
+        WORLD
+    };
+
+void Manipulate(const float *view, const float *projection, OPERATION operation, MODE mode, float *matrix, float *deltaMatrix = 0, float *snap = 0);**
+```
+
+### ImGui Example
+
+Code for :
+
+![Image of dialog](http://i.imgur.com/GL5flN1.png)
+
+```C++
+void EditTransform(float* cameraView, float* cameraProjection, float* matrix)
+{
+    static ImGuizmo::OPERATION mCurrentGizmoOperation(ImGuizmo::ROTATE);
+    static ImGuizmo::MODE mCurrentGizmoMode(ImGuizmo::WORLD);
+    if (ImGui::IsKeyPressed(ImGuiKey_T))
+        mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+    if (ImGui::IsKeyPressed(ImGuiKey_E))
+        mCurrentGizmoOperation = ImGuizmo::ROTATE;
+    if (ImGui::IsKeyPressed(ImGuiKey_R))
+        mCurrentGizmoOperation = ImGuizmo::SCALE;
+    if (ImGui::RadioButton("Translate", mCurrentGizmoOperation == ImGuizmo::TRANSLATE))
+        mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+    ImGui::SameLine();
+    if (ImGui::RadioButton("Rotate", mCurrentGizmoOperation == ImGuizmo::ROTATE))
+        mCurrentGizmoOperation = ImGuizmo::ROTATE;
+    ImGui::SameLine();
+    if (ImGui::RadioButton("Scale", mCurrentGizmoOperation == ImGuizmo::SCALE))
+        mCurrentGizmoOperation = ImGuizmo::SCALE;
+    float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+    ImGuizmo::DecomposeMatrixToComponents(matrix, matrixTranslation, matrixRotation, matrixScale);
+    ImGui::InputFloat3("Tr", matrixTranslation);
+    ImGui::InputFloat3("Rt", matrixRotation);
+    ImGui::InputFloat3("Sc", matrixScale);
+    ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, matrix);
+
+    if (mCurrentGizmoOperation != ImGuizmo::SCALE)
+    {
+        if (ImGui::RadioButton("Local", mCurrentGizmoMode == ImGuizmo::LOCAL))
+            mCurrentGizmoMode = ImGuizmo::LOCAL;
+        ImGui::SameLine();
+        if (ImGui::RadioButton("World", mCurrentGizmoMode == ImGuizmo::WORLD))
+            mCurrentGizmoMode = ImGuizmo::WORLD;
+    }
+    static bool useSnap(false);
+    if (ImGui::IsKeyPressed(ImGuiKey_S))
+        useSnap = !useSnap;
+    ImGui::Checkbox("##useSnap", &useSnap);
+    ImGui::SameLine();
+    vec_t snap;
+    switch (mCurrentGizmoOperation)
+    {
+    case ImGuizmo::TRANSLATE:
+        snap = config.mSnapTranslation;
+        ImGui::InputFloat3("Snap", &snap.x);
+        break;
+    case ImGuizmo::ROTATE:
+        snap = config.mSnapRotation;
+        ImGui::InputFloat("Angle Snap", &snap.x);
+        break;
+    case ImGuizmo::SCALE:
+        snap = config.mSnapScale;
+        ImGui::InputFloat("Scale Snap", &snap.x);
+        break;
+    default:
+        break;
+    }
+    ImGuiIO& io = ImGui::GetIO();
+    ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
+    ImGuizmo::Manipulate(cameraView, cameraProjection, mCurrentGizmoOperation, mCurrentGizmoMode, matrix, NULL, useSnap ? &snap.x : NULL);
+}
+```
+
+## Install
+
+ImGuizmo can be installed via [vcpkg](https://github.com/microsoft/vcpkg) and used cmake
+
+```bash
+vcpkg install imguizmo
+```
+
+See the [vcpkg example](/vcpkg-example) for more details
+
+## License
+
+ImGuizmo is licensed under the MIT License, see [LICENSE](/LICENSE) for more information.

src/ThirdParty/ImGuizmo/bin/imgui.ini

@@ -0,0 +1,25 @@
+[Window][Debug##Default]
+Pos=60,60
+Size=400,400
+Collapsed=0
+
+[Window][Editor]
+Pos=10,10
+Size=320,340
+Collapsed=0
+
+[Window][Gizmo]
+Pos=400,20
+Size=800,400
+Collapsed=0
+
+[Window][Graph Editor]
+Pos=981,294
+Size=787,580
+Collapsed=0
+
+[Window][Other controls]
+Pos=10,350
+Size=693,395
+Collapsed=0
+

src/ThirdParty/ImGuizmo/example/ImGuizmoSample.vcxproj

@@ -0,0 +1,184 @@
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
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+    <ClCompile>
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+      <PrecompiledHeader>
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+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\;.</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
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+      <PrecompiledHeader>
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+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>.\;..\</AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="..\GraphEditor.h" />
+    <ClInclude Include="..\ImCurveEdit.h" />
+    <ClInclude Include="..\ImGradient.h" />
+    <ClInclude Include="..\ImGuizmo.h" />
+    <ClInclude Include="..\ImSequencer.h" />
+    <ClInclude Include="..\ImZoomSlider.h" />
+    <ClInclude Include="ImApp.h" />
+    <ClInclude Include="imconfig.h" />
+    <ClInclude Include="imgui.h" />
+    <ClInclude Include="imgui_internal.h" />
+    <ClInclude Include="stb_image.h" />
+    <ClInclude Include="stb_rect_pack.h" />
+    <ClInclude Include="stb_textedit.h" />
+    <ClInclude Include="stb_truetype.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\GraphEditor.cpp" />
+    <ClCompile Include="..\ImCurveEdit.cpp" />
+    <ClCompile Include="..\ImGradient.cpp" />
+    <ClCompile Include="..\ImGuizmo.cpp" />
+    <ClCompile Include="..\ImSequencer.cpp" />
+    <ClCompile Include="imgui.cpp" />
+    <ClCompile Include="imgui_demo.cpp" />
+    <ClCompile Include="imgui_draw.cpp" />
+    <ClCompile Include="imgui_tables.cpp" />
+    <ClCompile Include="imgui_widgets.cpp" />
+    <ClCompile Include="main.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

src/ThirdParty/ImGuizmo/example/imconfig.h

@@ -0,0 +1,147 @@
+//-----------------------------------------------------------------------------
+// DEAR IMGUI COMPILE-TIME OPTIONS
+// Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via the ImGuiIO structure.
+// You can use ImGui::SetAllocatorFunctions() before calling ImGui::CreateContext() to rewire memory allocation functions.
+//-----------------------------------------------------------------------------
+// A) You may edit imconfig.h (and not overwrite it when updating Dear ImGui, or maintain a patch/rebased branch with your modifications to it)
+// B) or '#define IMGUI_USER_CONFIG "my_imgui_config.h"' in your project and then add directives in your own file without touching this template.
+//-----------------------------------------------------------------------------
+// You need to make sure that configuration settings are defined consistently _everywhere_ Dear ImGui is used, which include the imgui*.cpp
+// files but also _any_ of your code that uses Dear ImGui. This is because some compile-time options have an affect on data structures.
+// Defining those options in imconfig.h will ensure every compilation unit gets to see the same data structure layouts.
+// Call IMGUI_CHECKVERSION() from your .cpp file to verify that the data structures your files are using are matching the ones imgui.cpp is using.
+//-----------------------------------------------------------------------------
+
+#pragma once
+
+//---- Define assertion handler. Defaults to calling assert().
+// - If your macro uses multiple statements, make sure is enclosed in a 'do { .. } while (0)' block so it can be used as a single statement.
+// - Compiling with NDEBUG will usually strip out assert() to nothing, which is NOT recommended because we use asserts to notify of programmer mistakes.
+//#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
+//#define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts
+
+//---- Define attributes of all API symbols declarations, e.g. for DLL under Windows
+// Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
+// - Windows DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
+//   for each static/DLL boundary you are calling from. Read "Context and Memory Allocators" section of imgui.cpp for more details.
+//#define IMGUI_API __declspec(dllexport)                   // MSVC Windows: DLL export
+//#define IMGUI_API __declspec(dllimport)                   // MSVC Windows: DLL import
+//#define IMGUI_API __attribute__((visibility("default")))  // GCC/Clang: override visibility when set is hidden
+
+//---- Don't define obsolete functions/enums/behaviors. Consider enabling from time to time after updating to clean your code of obsolete function/names.
+//#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+
+//---- Disable all of Dear ImGui or don't implement standard windows/tools.
+// It is very strongly recommended to NOT disable the demo windows and debug tool during development. They are extremely useful in day to day work. Please read comments in imgui_demo.cpp.
+//#define IMGUI_DISABLE                                     // Disable everything: all headers and source files will be empty.
+//#define IMGUI_DISABLE_DEMO_WINDOWS                        // Disable demo windows: ShowDemoWindow()/ShowStyleEditor() will be empty.
+//#define IMGUI_DISABLE_DEBUG_TOOLS                         // Disable metrics/debugger and other debug tools: ShowMetricsWindow(), ShowDebugLogWindow() and ShowIDStackToolWindow() will be empty.
+
+//---- Don't implement some functions to reduce linkage requirements.
+//#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS   // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc. (user32.lib/.a, kernel32.lib/.a)
+//#define IMGUI_ENABLE_WIN32_DEFAULT_IME_FUNCTIONS          // [Win32] [Default with Visual Studio] Implement default IME handler (require imm32.lib/.a, auto-link for Visual Studio, -limm32 on command-line for MinGW)
+//#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS         // [Win32] [Default with non-Visual Studio compilers] Don't implement default IME handler (won't require imm32.lib/.a)
+//#define IMGUI_DISABLE_WIN32_FUNCTIONS                     // [Win32] Won't use and link with any Win32 function (clipboard, IME).
+//#define IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS      // [OSX] Implement default OSX clipboard handler (need to link with '-framework ApplicationServices', this is why this is not the default).
+//#define IMGUI_DISABLE_DEFAULT_SHELL_FUNCTIONS             // Don't implement default platform_io.Platform_OpenInShellFn() handler (Win32: ShellExecute(), require shell32.lib/.a, Mac/Linux: use system("")).
+//#define IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS            // Don't implement ImFormatString/ImFormatStringV so you can implement them yourself (e.g. if you don't want to link with vsnprintf)
+//#define IMGUI_DISABLE_DEFAULT_MATH_FUNCTIONS              // Don't implement ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 so you can implement them yourself.
+//#define IMGUI_DISABLE_FILE_FUNCTIONS                      // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle at all (replace them with dummies)
+//#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS              // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
+//#define IMGUI_DISABLE_DEFAULT_ALLOCATORS                  // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().
+//#define IMGUI_DISABLE_DEFAULT_FONT                        // Disable default embedded font (ProggyClean.ttf), remove ~9.5 KB from output binary. AddFontDefault() will assert.
+//#define IMGUI_DISABLE_SSE                                 // Disable use of SSE intrinsics even if available
+
+//---- Enable Test Engine / Automation features.
+//#define IMGUI_ENABLE_TEST_ENGINE                          // Enable imgui_test_engine hooks. Generally set automatically by include "imgui_te_config.h", see Test Engine for details.
+
+//---- Include imgui_user.h at the end of imgui.h as a convenience
+// May be convenient for some users to only explicitly include vanilla imgui.h and have extra stuff included.
+//#define IMGUI_INCLUDE_IMGUI_USER_H
+//#define IMGUI_USER_H_FILENAME         "my_folder/my_imgui_user.h"
+
+//---- Pack vertex colors as BGRA8 instead of RGBA8 (to avoid converting from one to another). Need dedicated backend support.
+//#define IMGUI_USE_BGRA_PACKED_COLOR
+
+//---- Use legacy CRC32-adler tables (used before 1.91.6), in order to preserve old .ini data that you cannot afford to invalidate.
+//#define IMGUI_USE_LEGACY_CRC32_ADLER
+
+//---- Use 32-bit for ImWchar (default is 16-bit) to support Unicode planes 1-16. (e.g. point beyond 0xFFFF like emoticons, dingbats, symbols, shapes, ancient languages, etc...)
+//#define IMGUI_USE_WCHAR32
+
+//---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
+// By default the embedded implementations are declared static and not available outside of Dear ImGui sources files.
+//#define IMGUI_STB_TRUETYPE_FILENAME   "my_folder/stb_truetype.h"
+//#define IMGUI_STB_RECT_PACK_FILENAME  "my_folder/stb_rect_pack.h"
+//#define IMGUI_STB_SPRINTF_FILENAME    "my_folder/stb_sprintf.h"    // only used if IMGUI_USE_STB_SPRINTF is defined.
+//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
+//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
+//#define IMGUI_DISABLE_STB_SPRINTF_IMPLEMENTATION                   // only disabled if IMGUI_USE_STB_SPRINTF is defined.
+
+//---- Use stb_sprintf.h for a faster implementation of vsnprintf instead of the one from libc (unless IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS is defined)
+// Compatibility checks of arguments and formats done by clang and GCC will be disabled in order to support the extra formats provided by stb_sprintf.h.
+//#define IMGUI_USE_STB_SPRINTF
+
+//---- Use FreeType to build and rasterize the font atlas (instead of stb_truetype which is embedded by default in Dear ImGui)
+// Requires FreeType headers to be available in the include path. Requires program to be compiled with 'misc/freetype/imgui_freetype.cpp' (in this repository) + the FreeType library (not provided).
+// Note that imgui_freetype.cpp may be used _without_ this define, if you manually call ImFontAtlas::SetFontLoader(). The define is simply a convenience.
+// On Windows you may use vcpkg with 'vcpkg install freetype --triplet=x64-windows' + 'vcpkg integrate install'.
+//#define IMGUI_ENABLE_FREETYPE
+
+//---- Use FreeType + plutosvg or lunasvg to render OpenType SVG fonts (SVGinOT)
+// Only works in combination with IMGUI_ENABLE_FREETYPE.
+// - plutosvg is currently easier to install, as e.g. it is part of vcpkg. It will support more fonts and may load them faster. See misc/freetype/README for instructions.
+// - Both require headers to be available in the include path + program to be linked with the library code (not provided).
+// - (note: lunasvg implementation is based on Freetype's rsvg-port.c which is licensed under CeCILL-C Free Software License Agreement)
+//#define IMGUI_ENABLE_FREETYPE_PLUTOSVG
+//#define IMGUI_ENABLE_FREETYPE_LUNASVG
+
+//---- Use stb_truetype to build and rasterize the font atlas (default)
+// The only purpose of this define is if you want force compilation of the stb_truetype backend ALONG with the FreeType backend.
+//#define IMGUI_ENABLE_STB_TRUETYPE
+
+//---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
+// This will be inlined as part of ImVec2 and ImVec4 class declarations.
+/*
+#define IM_VEC2_CLASS_EXTRA                                                     \
+        constexpr ImVec2(const MyVec2& f) : x(f.x), y(f.y) {}                   \
+        operator MyVec2() const { return MyVec2(x,y); }
+
+#define IM_VEC4_CLASS_EXTRA                                                     \
+        constexpr ImVec4(const MyVec4& f) : x(f.x), y(f.y), z(f.z), w(f.w) {}   \
+        operator MyVec4() const { return MyVec4(x,y,z,w); }
+*/
+//---- ...Or use Dear ImGui's own very basic math operators.
+//#define IMGUI_DEFINE_MATH_OPERATORS
+
+//---- Use 32-bit vertex indices (default is 16-bit) is one way to allow large meshes with more than 64K vertices.
+// Your renderer backend will need to support it (most example renderer backends support both 16/32-bit indices).
+// Another way to allow large meshes while keeping 16-bit indices is to handle ImDrawCmd::VtxOffset in your renderer.
+// Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
+//#define ImDrawIdx unsigned int
+
+//---- Override ImDrawCallback signature (will need to modify renderer backends accordingly)
+//struct ImDrawList;
+//struct ImDrawCmd;
+//typedef void (*MyImDrawCallback)(const ImDrawList* draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
+//#define ImDrawCallback MyImDrawCallback
+
+//---- Debug Tools: Macro to break in Debugger (we provide a default implementation of this in the codebase)
+// (use 'Metrics->Tools->Item Picker' to pick widgets with the mouse and break into them for easy debugging.)
+//#define IM_DEBUG_BREAK  IM_ASSERT(0)
+//#define IM_DEBUG_BREAK  __debugbreak()
+
+//---- Debug Tools: Enable highlight ID conflicts _before_ hovering items. When io.ConfigDebugHighlightIdConflicts is set.
+// (THIS WILL SLOW DOWN DEAR IMGUI. Only use occasionally and disable after use)
+//#define IMGUI_DEBUG_HIGHLIGHT_ALL_ID_CONFLICTS
+
+//---- Debug Tools: Enable slower asserts
+//#define IMGUI_DEBUG_PARANOID
+
+//---- Tip: You can add extra functions within the ImGui:: namespace from anywhere (e.g. your own sources/header files)
+/*
+namespace ImGui
+{
+    void MyFunction(const char* name, MyMatrix44* mtx);
+}
+*/

src/ThirdParty/ImGuizmo/example/imstb_rectpack.h

@@ -0,0 +1,627 @@
+// [DEAR IMGUI]
+// This is a slightly modified version of stb_rect_pack.h 1.01.
+// Grep for [DEAR IMGUI] to find the changes.
+// 
+// stb_rect_pack.h - v1.01 - public domain - rectangle packing
+// Sean Barrett 2014
+//
+// Useful for e.g. packing rectangular textures into an atlas.
+// Does not do rotation.
+//
+// Before #including,
+//
+//    #define STB_RECT_PACK_IMPLEMENTATION
+//
+// in the file that you want to have the implementation.
+//
+// Not necessarily the awesomest packing method, but better than
+// the totally naive one in stb_truetype (which is primarily what
+// this is meant to replace).
+//
+// Has only had a few tests run, may have issues.
+//
+// More docs to come.
+//
+// No memory allocations; uses qsort() and assert() from stdlib.
+// Can override those by defining STBRP_SORT and STBRP_ASSERT.
+//
+// This library currently uses the Skyline Bottom-Left algorithm.
+//
+// Please note: better rectangle packers are welcome! Please
+// implement them to the same API, but with a different init
+// function.
+//
+// Credits
+//
+//  Library
+//    Sean Barrett
+//  Minor features
+//    Martins Mozeiko
+//    github:IntellectualKitty
+//
+//  Bugfixes / warning fixes
+//    Jeremy Jaussaud
+//    Fabian Giesen
+//
+// Version history:
+//
+//     1.01  (2021-07-11)  always use large rect mode, expose STBRP__MAXVAL in public section
+//     1.00  (2019-02-25)  avoid small space waste; gracefully fail too-wide rectangles
+//     0.99  (2019-02-07)  warning fixes
+//     0.11  (2017-03-03)  return packing success/fail result
+//     0.10  (2016-10-25)  remove cast-away-const to avoid warnings
+//     0.09  (2016-08-27)  fix compiler warnings
+//     0.08  (2015-09-13)  really fix bug with empty rects (w=0 or h=0)
+//     0.07  (2015-09-13)  fix bug with empty rects (w=0 or h=0)
+//     0.06  (2015-04-15)  added STBRP_SORT to allow replacing qsort
+//     0.05:  added STBRP_ASSERT to allow replacing assert
+//     0.04:  fixed minor bug in STBRP_LARGE_RECTS support
+//     0.01:  initial release
+//
+// LICENSE
+//
+//   See end of file for license information.
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//       INCLUDE SECTION
+//
+
+#ifndef STB_INCLUDE_STB_RECT_PACK_H
+#define STB_INCLUDE_STB_RECT_PACK_H
+
+#define STB_RECT_PACK_VERSION  1
+
+#ifdef STBRP_STATIC
+#define STBRP_DEF static
+#else
+#define STBRP_DEF extern
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct stbrp_context stbrp_context;
+typedef struct stbrp_node    stbrp_node;
+typedef struct stbrp_rect    stbrp_rect;
+
+typedef int            stbrp_coord;
+
+#define STBRP__MAXVAL  0x7fffffff
+// Mostly for internal use, but this is the maximum supported coordinate value.
+
+STBRP_DEF int stbrp_pack_rects (stbrp_context *context, stbrp_rect *rects, int num_rects);
+// Assign packed locations to rectangles. The rectangles are of type
+// 'stbrp_rect' defined below, stored in the array 'rects', and there
+// are 'num_rects' many of them.
+//
+// Rectangles which are successfully packed have the 'was_packed' flag
+// set to a non-zero value and 'x' and 'y' store the minimum location
+// on each axis (i.e. bottom-left in cartesian coordinates, top-left
+// if you imagine y increasing downwards). Rectangles which do not fit
+// have the 'was_packed' flag set to 0.
+//
+// You should not try to access the 'rects' array from another thread
+// while this function is running, as the function temporarily reorders
+// the array while it executes.
+//
+// To pack into another rectangle, you need to call stbrp_init_target
+// again. To continue packing into the same rectangle, you can call
+// this function again. Calling this multiple times with multiple rect
+// arrays will probably produce worse packing results than calling it
+// a single time with the full rectangle array, but the option is
+// available.
+//
+// The function returns 1 if all of the rectangles were successfully
+// packed and 0 otherwise.
+
+struct stbrp_rect
+{
+   // reserved for your use:
+   int            id;
+
+   // input:
+   stbrp_coord    w, h;
+
+   // output:
+   stbrp_coord    x, y;
+   int            was_packed;  // non-zero if valid packing
+
+}; // 16 bytes, nominally
+
+
+STBRP_DEF void stbrp_init_target (stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes);
+// Initialize a rectangle packer to:
+//    pack a rectangle that is 'width' by 'height' in dimensions
+//    using temporary storage provided by the array 'nodes', which is 'num_nodes' long
+//
+// You must call this function every time you start packing into a new target.
+//
+// There is no "shutdown" function. The 'nodes' memory must stay valid for
+// the following stbrp_pack_rects() call (or calls), but can be freed after
+// the call (or calls) finish.
+//
+// Note: to guarantee best results, either:
+//       1. make sure 'num_nodes' >= 'width'
+//   or  2. call stbrp_allow_out_of_mem() defined below with 'allow_out_of_mem = 1'
+//
+// If you don't do either of the above things, widths will be quantized to multiples
+// of small integers to guarantee the algorithm doesn't run out of temporary storage.
+//
+// If you do #2, then the non-quantized algorithm will be used, but the algorithm
+// may run out of temporary storage and be unable to pack some rectangles.
+
+STBRP_DEF void stbrp_setup_allow_out_of_mem (stbrp_context *context, int allow_out_of_mem);
+// Optionally call this function after init but before doing any packing to
+// change the handling of the out-of-temp-memory scenario, described above.
+// If you call init again, this will be reset to the default (false).
+
+
+STBRP_DEF void stbrp_setup_heuristic (stbrp_context *context, int heuristic);
+// Optionally select which packing heuristic the library should use. Different
+// heuristics will produce better/worse results for different data sets.
+// If you call init again, this will be reset to the default.
+
+enum
+{
+   STBRP_HEURISTIC_Skyline_default=0,
+   STBRP_HEURISTIC_Skyline_BL_sortHeight = STBRP_HEURISTIC_Skyline_default,
+   STBRP_HEURISTIC_Skyline_BF_sortHeight
+};
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// the details of the following structures don't matter to you, but they must
+// be visible so you can handle the memory allocations for them
+
+struct stbrp_node
+{
+   stbrp_coord  x,y;
+   stbrp_node  *next;
+};
+
+struct stbrp_context
+{
+   int width;
+   int height;
+   int align;
+   int init_mode;
+   int heuristic;
+   int num_nodes;
+   stbrp_node *active_head;
+   stbrp_node *free_head;
+   stbrp_node extra[2]; // we allocate two extra nodes so optimal user-node-count is 'width' not 'width+2'
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//     IMPLEMENTATION SECTION
+//
+
+#ifdef STB_RECT_PACK_IMPLEMENTATION
+#ifndef STBRP_SORT
+#include <stdlib.h>
+#define STBRP_SORT qsort
+#endif
+
+#ifndef STBRP_ASSERT
+#include <assert.h>
+#define STBRP_ASSERT assert
+#endif
+
+#ifdef _MSC_VER
+#define STBRP__NOTUSED(v)  (void)(v)
+#define STBRP__CDECL       __cdecl
+#else
+#define STBRP__NOTUSED(v)  (void)sizeof(v)
+#define STBRP__CDECL
+#endif
+
+enum
+{
+   STBRP__INIT_skyline = 1
+};
+
+STBRP_DEF void stbrp_setup_heuristic(stbrp_context *context, int heuristic)
+{
+   switch (context->init_mode) {
+      case STBRP__INIT_skyline:
+         STBRP_ASSERT(heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight || heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight);
+         context->heuristic = heuristic;
+         break;
+      default:
+         STBRP_ASSERT(0);
+   }
+}
+
+STBRP_DEF void stbrp_setup_allow_out_of_mem(stbrp_context *context, int allow_out_of_mem)
+{
+   if (allow_out_of_mem)
+      // if it's ok to run out of memory, then don't bother aligning them;
+      // this gives better packing, but may fail due to OOM (even though
+      // the rectangles easily fit). @TODO a smarter approach would be to only
+      // quantize once we've hit OOM, then we could get rid of this parameter.
+      context->align = 1;
+   else {
+      // if it's not ok to run out of memory, then quantize the widths
+      // so that num_nodes is always enough nodes.
+      //
+      // I.e. num_nodes * align >= width
+      //                  align >= width / num_nodes
+      //                  align = ceil(width/num_nodes)
+
+      context->align = (context->width + context->num_nodes-1) / context->num_nodes;
+   }
+}
+
+STBRP_DEF void stbrp_init_target(stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes)
+{
+   int i;
+
+   for (i=0; i < num_nodes-1; ++i)
+      nodes[i].next = &nodes[i+1];
+   nodes[i].next = NULL;
+   context->init_mode = STBRP__INIT_skyline;
+   context->heuristic = STBRP_HEURISTIC_Skyline_default;
+   context->free_head = &nodes[0];
+   context->active_head = &context->extra[0];
+   context->width = width;
+   context->height = height;
+   context->num_nodes = num_nodes;
+   stbrp_setup_allow_out_of_mem(context, 0);
+
+   // node 0 is the full width, node 1 is the sentinel (lets us not store width explicitly)
+   context->extra[0].x = 0;
+   context->extra[0].y = 0;
+   context->extra[0].next = &context->extra[1];
+   context->extra[1].x = (stbrp_coord) width;
+   context->extra[1].y = (1<<30);
+   context->extra[1].next = NULL;
+}
+
+// find minimum y position if it starts at x1
+static int stbrp__skyline_find_min_y(stbrp_context *c, stbrp_node *first, int x0, int width, int *pwaste)
+{
+   stbrp_node *node = first;
+   int x1 = x0 + width;
+   int min_y, visited_width, waste_area;
+
+   STBRP__NOTUSED(c);
+
+   STBRP_ASSERT(first->x <= x0);
+
+   #if 0
+   // skip in case we're past the node
+   while (node->next->x <= x0)
+      ++node;
+   #else
+   STBRP_ASSERT(node->next->x > x0); // we ended up handling this in the caller for efficiency
+   #endif
+
+   STBRP_ASSERT(node->x <= x0);
+
+   min_y = 0;
+   waste_area = 0;
+   visited_width = 0;
+   while (node->x < x1) {
+      if (node->y > min_y) {
+         // raise min_y higher.
+         // we've accounted for all waste up to min_y,
+         // but we'll now add more waste for everything we've visted
+         waste_area += visited_width * (node->y - min_y);
+         min_y = node->y;
+         // the first time through, visited_width might be reduced
+         if (node->x < x0)
+            visited_width += node->next->x - x0;
+         else
+            visited_width += node->next->x - node->x;
+      } else {
+         // add waste area
+         int under_width = node->next->x - node->x;
+         if (under_width + visited_width > width)
+            under_width = width - visited_width;
+         waste_area += under_width * (min_y - node->y);
+         visited_width += under_width;
+      }
+      node = node->next;
+   }
+
+   *pwaste = waste_area;
+   return min_y;
+}
+
+typedef struct
+{
+   int x,y;
+   stbrp_node **prev_link;
+} stbrp__findresult;
+
+static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int width, int height)
+{
+   int best_waste = (1<<30), best_x, best_y = (1 << 30);
+   stbrp__findresult fr;
+   stbrp_node **prev, *node, *tail, **best = NULL;
+
+   // align to multiple of c->align
+   width = (width + c->align - 1);
+   width -= width % c->align;
+   STBRP_ASSERT(width % c->align == 0);
+
+   // if it can't possibly fit, bail immediately
+   if (width > c->width || height > c->height) {
+      fr.prev_link = NULL;
+      fr.x = fr.y = 0;
+      return fr;
+   }
+
+   node = c->active_head;
+   prev = &c->active_head;
+   while (node->x + width <= c->width) {
+      int y,waste;
+      y = stbrp__skyline_find_min_y(c, node, node->x, width, &waste);
+      if (c->heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight) { // actually just want to test BL
+         // bottom left
+         if (y < best_y) {
+            best_y = y;
+            best = prev;
+         }
+      } else {
+         // best-fit
+         if (y + height <= c->height) {
+            // can only use it if it first vertically
+            if (y < best_y || (y == best_y && waste < best_waste)) {
+               best_y = y;
+               best_waste = waste;
+               best = prev;
+            }
+         }
+      }
+      prev = &node->next;
+      node = node->next;
+   }
+
+   best_x = (best == NULL) ? 0 : (*best)->x;
+
+   // if doing best-fit (BF), we also have to try aligning right edge to each node position
+   //
+   // e.g, if fitting
+   //
+   //     ____________________
+   //    |____________________|
+   //
+   //            into
+   //
+   //   |                         |
+   //   |             ____________|
+   //   |____________|
+   //
+   // then right-aligned reduces waste, but bottom-left BL is always chooses left-aligned
+   //
+   // This makes BF take about 2x the time
+
+   if (c->heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight) {
+      tail = c->active_head;
+      node = c->active_head;
+      prev = &c->active_head;
+      // find first node that's admissible
+      while (tail->x < width)
+         tail = tail->next;
+      while (tail) {
+         int xpos = tail->x - width;
+         int y,waste;
+         STBRP_ASSERT(xpos >= 0);
+         // find the left position that matches this
+         while (node->next->x <= xpos) {
+            prev = &node->next;
+            node = node->next;
+         }
+         STBRP_ASSERT(node->next->x > xpos && node->x <= xpos);
+         y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste);
+         if (y + height <= c->height) {
+            if (y <= best_y) {
+               if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) {
+                  best_x = xpos;
+                  //STBRP_ASSERT(y <= best_y); [DEAR IMGUI]
+                  best_y = y;
+                  best_waste = waste;
+                  best = prev;
+               }
+            }
+         }
+         tail = tail->next;
+      }
+   }
+
+   fr.prev_link = best;
+   fr.x = best_x;
+   fr.y = best_y;
+   return fr;
+}
+
+static stbrp__findresult stbrp__skyline_pack_rectangle(stbrp_context *context, int width, int height)
+{
+   // find best position according to heuristic
+   stbrp__findresult res = stbrp__skyline_find_best_pos(context, width, height);
+   stbrp_node *node, *cur;
+
+   // bail if:
+   //    1. it failed
+   //    2. the best node doesn't fit (we don't always check this)
+   //    3. we're out of memory
+   if (res.prev_link == NULL || res.y + height > context->height || context->free_head == NULL) {
+      res.prev_link = NULL;
+      return res;
+   }
+
+   // on success, create new node
+   node = context->free_head;
+   node->x = (stbrp_coord) res.x;
+   node->y = (stbrp_coord) (res.y + height);
+
+   context->free_head = node->next;
+
+   // insert the new node into the right starting point, and
+   // let 'cur' point to the remaining nodes needing to be
+   // stiched back in
+
+   cur = *res.prev_link;
+   if (cur->x < res.x) {
+      // preserve the existing one, so start testing with the next one
+      stbrp_node *next = cur->next;
+      cur->next = node;
+      cur = next;
+   } else {
+      *res.prev_link = node;
+   }
+
+   // from here, traverse cur and free the nodes, until we get to one
+   // that shouldn't be freed
+   while (cur->next && cur->next->x <= res.x + width) {
+      stbrp_node *next = cur->next;
+      // move the current node to the free list
+      cur->next = context->free_head;
+      context->free_head = cur;
+      cur = next;
+   }
+
+   // stitch the list back in
+   node->next = cur;
+
+   if (cur->x < res.x + width)
+      cur->x = (stbrp_coord) (res.x + width);
+
+#ifdef _DEBUG
+   cur = context->active_head;
+   while (cur->x < context->width) {
+      STBRP_ASSERT(cur->x < cur->next->x);
+      cur = cur->next;
+   }
+   STBRP_ASSERT(cur->next == NULL);
+
+   {
+      int count=0;
+      cur = context->active_head;
+      while (cur) {
+         cur = cur->next;
+         ++count;
+      }
+      cur = context->free_head;
+      while (cur) {
+         cur = cur->next;
+         ++count;
+      }
+      STBRP_ASSERT(count == context->num_nodes+2);
+   }
+#endif
+
+   return res;
+}
+
+static int STBRP__CDECL rect_height_compare(const void *a, const void *b)
+{
+   const stbrp_rect *p = (const stbrp_rect *) a;
+   const stbrp_rect *q = (const stbrp_rect *) b;
+   if (p->h > q->h)
+      return -1;
+   if (p->h < q->h)
+      return  1;
+   return (p->w > q->w) ? -1 : (p->w < q->w);
+}
+
+static int STBRP__CDECL rect_original_order(const void *a, const void *b)
+{
+   const stbrp_rect *p = (const stbrp_rect *) a;
+   const stbrp_rect *q = (const stbrp_rect *) b;
+   return (p->was_packed < q->was_packed) ? -1 : (p->was_packed > q->was_packed);
+}
+
+STBRP_DEF int stbrp_pack_rects(stbrp_context *context, stbrp_rect *rects, int num_rects)
+{
+   int i, all_rects_packed = 1;
+
+   // we use the 'was_packed' field internally to allow sorting/unsorting
+   for (i=0; i < num_rects; ++i) {
+      rects[i].was_packed = i;
+   }
+
+   // sort according to heuristic
+   STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_height_compare);
+
+   for (i=0; i < num_rects; ++i) {
+      if (rects[i].w == 0 || rects[i].h == 0) {
+         rects[i].x = rects[i].y = 0;  // empty rect needs no space
+      } else {
+         stbrp__findresult fr = stbrp__skyline_pack_rectangle(context, rects[i].w, rects[i].h);
+         if (fr.prev_link) {
+            rects[i].x = (stbrp_coord) fr.x;
+            rects[i].y = (stbrp_coord) fr.y;
+         } else {
+            rects[i].x = rects[i].y = STBRP__MAXVAL;
+         }
+      }
+   }
+
+   // unsort
+   STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_original_order);
+
+   // set was_packed flags and all_rects_packed status
+   for (i=0; i < num_rects; ++i) {
+      rects[i].was_packed = !(rects[i].x == STBRP__MAXVAL && rects[i].y == STBRP__MAXVAL);
+      if (!rects[i].was_packed)
+         all_rects_packed = 0;
+   }
+
+   // return the all_rects_packed status
+   return all_rects_packed;
+}
+#endif
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/

src/ThirdParty/ImGuizmo/example/main.cpp

@@ -0,0 +1,927 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#define IMGUI_DEFINE_MATH_OPERATORS
+#include "imgui.h"
+#include "imgui_internal.h"
+#define IMAPP_IMPL
+#include "ImApp.h"
+
+#include "ImGuizmo.h"
+#include "ImSequencer.h"
+#include "ImZoomSlider.h"
+#include "ImCurveEdit.h"
+#include "GraphEditor.h"
+#include <cmath>
+#include <vector>
+#include <algorithm>
+
+bool useWindow = true;
+int gizmoCount = 1;
+float camDistance = 8.f;
+static ImGuizmo::OPERATION mCurrentGizmoOperation(ImGuizmo::TRANSLATE);
+static ImGuizmo::MODE mCurrentGizmoMode(ImGuizmo::WORLD);
+static bool useSnap(false);
+static float snap[3] = { 1.f, 1.f, 1.f };
+
+float objectMatrix[4][16] = {
+  { 1.f, 0.f, 0.f, 0.f,
+    0.f, 1.f, 0.f, 0.f,
+    0.f, 0.f, 1.f, 0.f,
+    0.f, 0.f, 0.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  2.f, 0.f, 0.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  2.f, 0.f, 2.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  0.f, 0.f, 2.f, 1.f }
+};
+
+static const float identityMatrix[16] =
+{ 1.f, 0.f, 0.f, 0.f,
+    0.f, 1.f, 0.f, 0.f,
+    0.f, 0.f, 1.f, 0.f,
+    0.f, 0.f, 0.f, 1.f };
+
+void Frustum(float left, float right, float bottom, float top, float znear, float zfar, float* m16)
+{
+   float temp, temp2, temp3, temp4;
+   temp = 2.0f * znear;
+   temp2 = right - left;
+   temp3 = top - bottom;
+   temp4 = zfar - znear;
+   m16[0] = temp / temp2;
+   m16[1] = 0.0;
+   m16[2] = 0.0;
+   m16[3] = 0.0;
+   m16[4] = 0.0;
+   m16[5] = temp / temp3;
+   m16[6] = 0.0;
+   m16[7] = 0.0;
+   m16[8] = (right + left) / temp2;
+   m16[9] = (top + bottom) / temp3;
+   m16[10] = (-zfar - znear) / temp4;
+   m16[11] = -1.0f;
+   m16[12] = 0.0;
+   m16[13] = 0.0;
+   m16[14] = (-temp * zfar) / temp4;
+   m16[15] = 0.0;
+}
+
+void Perspective(float fovyInDegrees, float aspectRatio, float znear, float zfar, float* m16)
+{
+   float ymax, xmax;
+   ymax = znear * tanf(fovyInDegrees * 3.141592f / 180.0f);
+   xmax = ymax * aspectRatio;
+   Frustum(-xmax, xmax, -ymax, ymax, znear, zfar, m16);
+}
+
+void Cross(const float* a, const float* b, float* r)
+{
+   r[0] = a[1] * b[2] - a[2] * b[1];
+   r[1] = a[2] * b[0] - a[0] * b[2];
+   r[2] = a[0] * b[1] - a[1] * b[0];
+}
+
+float Dot(const float* a, const float* b)
+{
+   return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+}
+
+void Normalize(const float* a, float* r)
+{
+   float il = 1.f / (sqrtf(Dot(a, a)) + FLT_EPSILON);
+   r[0] = a[0] * il;
+   r[1] = a[1] * il;
+   r[2] = a[2] * il;
+}
+
+void LookAt(const float* eye, const float* at, const float* up, float* m16)
+{
+   float X[3], Y[3], Z[3], tmp[3];
+
+   tmp[0] = eye[0] - at[0];
+   tmp[1] = eye[1] - at[1];
+   tmp[2] = eye[2] - at[2];
+   Normalize(tmp, Z);
+   Normalize(up, Y);
+
+   Cross(Y, Z, tmp);
+   Normalize(tmp, X);
+
+   Cross(Z, X, tmp);
+   Normalize(tmp, Y);
+
+   m16[0] = X[0];
+   m16[1] = Y[0];
+   m16[2] = Z[0];
+   m16[3] = 0.0f;
+   m16[4] = X[1];
+   m16[5] = Y[1];
+   m16[6] = Z[1];
+   m16[7] = 0.0f;
+   m16[8] = X[2];
+   m16[9] = Y[2];
+   m16[10] = Z[2];
+   m16[11] = 0.0f;
+   m16[12] = -Dot(X, eye);
+   m16[13] = -Dot(Y, eye);
+   m16[14] = -Dot(Z, eye);
+   m16[15] = 1.0f;
+}
+
+void OrthoGraphic(const float l, float r, float b, const float t, float zn, const float zf, float* m16)
+{
+   m16[0] = 2 / (r - l);
+   m16[1] = 0.0f;
+   m16[2] = 0.0f;
+   m16[3] = 0.0f;
+   m16[4] = 0.0f;
+   m16[5] = 2 / (t - b);
+   m16[6] = 0.0f;
+   m16[7] = 0.0f;
+   m16[8] = 0.0f;
+   m16[9] = 0.0f;
+   m16[10] = 1.0f / (zf - zn);
+   m16[11] = 0.0f;
+   m16[12] = (l + r) / (l - r);
+   m16[13] = (t + b) / (b - t);
+   m16[14] = zn / (zn - zf);
+   m16[15] = 1.0f;
+}
+
+inline void rotationY(const float angle, float* m16)
+{
+   float c = cosf(angle);
+   float s = sinf(angle);
+
+   m16[0] = c;
+   m16[1] = 0.0f;
+   m16[2] = -s;
+   m16[3] = 0.0f;
+   m16[4] = 0.0f;
+   m16[5] = 1.f;
+   m16[6] = 0.0f;
+   m16[7] = 0.0f;
+   m16[8] = s;
+   m16[9] = 0.0f;
+   m16[10] = c;
+   m16[11] = 0.0f;
+   m16[12] = 0.f;
+   m16[13] = 0.f;
+   m16[14] = 0.f;
+   m16[15] = 1.0f;
+}
+
+void TransformStart(float* cameraView, float* cameraProjection, float* matrix)
+{
+    static float bounds[] = { -0.5f, -0.5f, -0.5f, 0.5f, 0.5f, 0.5f };
+    static float boundsSnap[] = { 0.1f, 0.1f, 0.1f };
+    static bool boundSizing = false;
+    static bool boundSizingSnap = false;
+
+    if (ImGui::IsKeyPressed(ImGuiKey_T))
+        mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+    if (ImGui::IsKeyPressed(ImGuiKey_E))
+        mCurrentGizmoOperation = ImGuizmo::ROTATE;
+    if (ImGui::IsKeyPressed(ImGuiKey_R)) // r Key
+        mCurrentGizmoOperation = ImGuizmo::SCALE;
+    if (ImGui::RadioButton("Translate", mCurrentGizmoOperation == ImGuizmo::TRANSLATE))
+        mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+    ImGui::SameLine();
+    if (ImGui::RadioButton("Rotate", mCurrentGizmoOperation == ImGuizmo::ROTATE))
+        mCurrentGizmoOperation = ImGuizmo::ROTATE;
+    ImGui::SameLine();
+    if (ImGui::RadioButton("Scale", mCurrentGizmoOperation == ImGuizmo::SCALE))
+        mCurrentGizmoOperation = ImGuizmo::SCALE;
+    float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+    ImGuizmo::DecomposeMatrixToComponents(matrix, matrixTranslation, matrixRotation, matrixScale);
+    ImGui::InputFloat3("Tr", matrixTranslation);
+    ImGui::InputFloat3("Rt", matrixRotation);
+    ImGui::InputFloat3("Sc", matrixScale);
+    ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, matrix);
+
+    if (mCurrentGizmoOperation != ImGuizmo::SCALE)
+    {
+        if (ImGui::RadioButton("Local", mCurrentGizmoMode == ImGuizmo::LOCAL))
+            mCurrentGizmoMode = ImGuizmo::LOCAL;
+        ImGui::SameLine();
+        if (ImGui::RadioButton("World", mCurrentGizmoMode == ImGuizmo::WORLD))
+            mCurrentGizmoMode = ImGuizmo::WORLD;
+    }
+
+    if (ImGui::IsKeyPressed(ImGuiKey_S))
+        useSnap = !useSnap;
+    ImGui::Checkbox("##useSnap", &useSnap);
+    ImGui::SameLine();
+    switch (mCurrentGizmoOperation)
+    {
+    case ImGuizmo::TRANSLATE:
+        ImGui::InputFloat3("Snap", &snap[0]);
+        break;
+    case ImGuizmo::ROTATE:
+        ImGui::InputFloat("Angle Snap", &snap[0]);
+        break;
+    case ImGuizmo::SCALE:
+        ImGui::InputFloat("Scale Snap", &snap[0]);
+        break;
+    }
+
+    ImGuiIO& io = ImGui::GetIO();
+    float viewManipulateRight = io.DisplaySize.x;
+    float viewManipulateTop = 0;
+    static ImGuiWindowFlags gizmoWindowFlags = 0;
+    ImGui::SetNextWindowSize(ImVec2(800, 400), ImGuiCond_Appearing);
+    ImGui::SetNextWindowPos(ImVec2(400, 20), ImGuiCond_Appearing);
+    ImGui::PushStyleColor(ImGuiCol_WindowBg, (ImVec4)ImColor(0.35f, 0.3f, 0.3f));
+    if (useWindow)
+    {
+       ImGui::Begin("Gizmo", 0, gizmoWindowFlags);
+       ImGuizmo::SetDrawlist();
+    }
+    float windowWidth = (float)ImGui::GetWindowWidth();
+    float windowHeight = (float)ImGui::GetWindowHeight();
+
+    if (!useWindow)
+    {
+       ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
+    }
+    else
+    {
+       ImGuizmo::SetRect(ImGui::GetWindowPos().x, ImGui::GetWindowPos().y, windowWidth, windowHeight);
+    }
+    viewManipulateRight = ImGui::GetWindowPos().x + windowWidth;
+    viewManipulateTop = ImGui::GetWindowPos().y;
+    ImGuiWindow* window = ImGui::GetCurrentWindow();
+    gizmoWindowFlags = ImGui::IsWindowHovered() && ImGui::IsMouseHoveringRect(window->InnerRect.Min, window->InnerRect.Max) ? ImGuiWindowFlags_NoMove : 0;
+
+    ImGuizmo::DrawGrid(cameraView, cameraProjection, identityMatrix, 100.f);
+    ImGuizmo::DrawCubes(cameraView, cameraProjection, &objectMatrix[0][0], gizmoCount);
+
+    ImGuizmo::ViewManipulate(cameraView, camDistance, ImVec2(viewManipulateRight - 128, viewManipulateTop), ImVec2(128, 128), 0x10101010);
+}
+
+void TransformEnd()
+{
+   if (useWindow)
+   {
+      ImGui::End();
+   }
+   ImGui::PopStyleColor(1);
+}
+
+void EditTransform(float* cameraView, float* cameraProjection, float* matrix)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    float windowWidth = (float)ImGui::GetWindowWidth();
+    float windowHeight = (float)ImGui::GetWindowHeight();
+    if (!useWindow)
+    {
+       ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
+    }
+    else
+    {
+       ImGuizmo::SetRect(ImGui::GetWindowPos().x, ImGui::GetWindowPos().y, windowWidth, windowHeight);
+    }
+    ImGuizmo::Manipulate(cameraView, cameraProjection, mCurrentGizmoOperation, mCurrentGizmoMode, matrix, NULL, useSnap ? &snap[0] : NULL);
+}
+
+//
+//
+// ImSequencer interface
+//
+//
+static const char* SequencerItemTypeNames[] = { "Camera","Music", "ScreenEffect", "FadeIn", "Animation" };
+
+struct RampEdit : public ImCurveEdit::Delegate
+{
+   RampEdit()
+   {
+      mPts[0][0] = ImVec2(-10.f, 0);
+      mPts[0][1] = ImVec2(20.f, 0.6f);
+      mPts[0][2] = ImVec2(25.f, 0.2f);
+      mPts[0][3] = ImVec2(70.f, 0.4f);
+      mPts[0][4] = ImVec2(120.f, 1.f);
+      mPointCount[0] = 5;
+
+      mPts[1][0] = ImVec2(-50.f, 0.2f);
+      mPts[1][1] = ImVec2(33.f, 0.7f);
+      mPts[1][2] = ImVec2(80.f, 0.2f);
+      mPts[1][3] = ImVec2(82.f, 0.8f);
+      mPointCount[1] = 4;
+
+
+      mPts[2][0] = ImVec2(40.f, 0);
+      mPts[2][1] = ImVec2(60.f, 0.1f);
+      mPts[2][2] = ImVec2(90.f, 0.82f);
+      mPts[2][3] = ImVec2(150.f, 0.24f);
+      mPts[2][4] = ImVec2(200.f, 0.34f);
+      mPts[2][5] = ImVec2(250.f, 0.12f);
+      mPointCount[2] = 6;
+      mbVisible[0] = mbVisible[1] = mbVisible[2] = true;
+      mMax = ImVec2(1.f, 1.f);
+      mMin = ImVec2(0.f, 0.f);
+   }
+   size_t GetCurveCount()
+   {
+      return 3;
+   }
+
+   bool IsVisible(size_t curveIndex)
+   {
+      return mbVisible[curveIndex];
+   }
+   size_t GetPointCount(size_t curveIndex)
+   {
+      return mPointCount[curveIndex];
+   }
+
+   uint32_t GetCurveColor(size_t curveIndex)
+   {
+      uint32_t cols[] = { 0xFF0000FF, 0xFF00FF00, 0xFFFF0000 };
+      return cols[curveIndex];
+   }
+   ImVec2* GetPoints(size_t curveIndex)
+   {
+      return mPts[curveIndex];
+   }
+   virtual ImCurveEdit::CurveType GetCurveType(size_t curveIndex) const { return ImCurveEdit::CurveSmooth; }
+   virtual int EditPoint(size_t curveIndex, int pointIndex, ImVec2 value)
+   {
+      mPts[curveIndex][pointIndex] = ImVec2(value.x, value.y);
+      SortValues(curveIndex);
+      for (size_t i = 0; i < GetPointCount(curveIndex); i++)
+      {
+         if (mPts[curveIndex][i].x == value.x)
+            return (int)i;
+      }
+      return pointIndex;
+   }
+   virtual void AddPoint(size_t curveIndex, ImVec2 value)
+   {
+      if (mPointCount[curveIndex] >= 8)
+         return;
+      mPts[curveIndex][mPointCount[curveIndex]++] = value;
+      SortValues(curveIndex);
+   }
+   virtual ImVec2& GetMax() { return mMax; }
+   virtual ImVec2& GetMin() { return mMin; }
+   virtual unsigned int GetBackgroundColor() { return 0; }
+   ImVec2 mPts[3][8];
+   size_t mPointCount[3];
+   bool mbVisible[3];
+   ImVec2 mMin;
+   ImVec2 mMax;
+private:
+   void SortValues(size_t curveIndex)
+   {
+      auto b = std::begin(mPts[curveIndex]);
+      auto e = std::begin(mPts[curveIndex]) + GetPointCount(curveIndex);
+      std::sort(b, e, [](ImVec2 a, ImVec2 b) { return a.x < b.x; });
+
+   }
+};
+
+struct MySequence : public ImSequencer::SequenceInterface
+{
+   // interface with sequencer
+
+   virtual int GetFrameMin() const {
+      return mFrameMin;
+   }
+   virtual int GetFrameMax() const {
+      return mFrameMax;
+   }
+   virtual int GetItemCount() const { return (int)myItems.size(); }
+
+   virtual int GetItemTypeCount() const { return sizeof(SequencerItemTypeNames) / sizeof(char*); }
+   virtual const char* GetItemTypeName(int typeIndex) const { return SequencerItemTypeNames[typeIndex]; }
+   virtual const char* GetItemLabel(int index) const
+   {
+      static char tmps[512];
+      snprintf(tmps, 512, "[%02d] %s", index, SequencerItemTypeNames[myItems[index].mType]);
+      return tmps;
+   }
+
+   virtual void Get(int index, int** start, int** end, int* type, unsigned int* color)
+   {
+      MySequenceItem& item = myItems[index];
+      if (color)
+         *color = 0xFFAA8080; // same color for everyone, return color based on type
+      if (start)
+         *start = &item.mFrameStart;
+      if (end)
+         *end = &item.mFrameEnd;
+      if (type)
+         *type = item.mType;
+   }
+   virtual void Add(int type) { myItems.push_back(MySequenceItem{ type, 0, 10, false }); };
+   virtual void Del(int index) { myItems.erase(myItems.begin() + index); }
+   virtual void Duplicate(int index) { myItems.push_back(myItems[index]); }
+
+   virtual size_t GetCustomHeight(int index) { return myItems[index].mExpanded ? 300 : 0; }
+
+   // my datas
+   MySequence() : mFrameMin(0), mFrameMax(0) {}
+   int mFrameMin, mFrameMax;
+   struct MySequenceItem
+   {
+      int mType;
+      int mFrameStart, mFrameEnd;
+      bool mExpanded;
+   };
+   std::vector<MySequenceItem> myItems;
+   RampEdit rampEdit;
+
+   virtual void DoubleClick(int index) {
+      if (myItems[index].mExpanded)
+      {
+         myItems[index].mExpanded = false;
+         return;
+      }
+      for (auto& item : myItems)
+         item.mExpanded = false;
+      myItems[index].mExpanded = !myItems[index].mExpanded;
+   }
+
+   virtual void CustomDraw(int index, ImDrawList* draw_list, const ImRect& rc, const ImRect& legendRect, const ImRect& clippingRect, const ImRect& legendClippingRect)
+   {
+      static const char* labels[] = { "Translation", "Rotation" , "Scale" };
+
+      rampEdit.mMax = ImVec2(float(mFrameMax), 1.f);
+      rampEdit.mMin = ImVec2(float(mFrameMin), 0.f);
+      draw_list->PushClipRect(legendClippingRect.Min, legendClippingRect.Max, true);
+      for (int i = 0; i < 3; i++)
+      {
+         ImVec2 pta(legendRect.Min.x + 30, legendRect.Min.y + i * 14.f);
+         ImVec2 ptb(legendRect.Max.x, legendRect.Min.y + (i + 1) * 14.f);
+         draw_list->AddText(pta, rampEdit.mbVisible[i] ? 0xFFFFFFFF : 0x80FFFFFF, labels[i]);
+         if (ImRect(pta, ptb).Contains(ImGui::GetMousePos()) && ImGui::IsMouseClicked(0))
+            rampEdit.mbVisible[i] = !rampEdit.mbVisible[i];
+      }
+      draw_list->PopClipRect();
+
+      ImGui::SetCursorScreenPos(rc.Min);
+      ImCurveEdit::Edit(rampEdit, rc.Max - rc.Min, 137 + index, &clippingRect);
+   }
+
+   virtual void CustomDrawCompact(int index, ImDrawList* draw_list, const ImRect& rc, const ImRect& clippingRect)
+   {
+      rampEdit.mMax = ImVec2(float(mFrameMax), 1.f);
+      rampEdit.mMin = ImVec2(float(mFrameMin), 0.f);
+      draw_list->PushClipRect(clippingRect.Min, clippingRect.Max, true);
+      for (int i = 0; i < 3; i++)
+      {
+         for (unsigned int j = 0; j < rampEdit.mPointCount[i]; j++)
+         {
+            float p = rampEdit.mPts[i][j].x;
+            if (p < myItems[index].mFrameStart || p > myItems[index].mFrameEnd)
+               continue;
+            float r = (p - mFrameMin) / float(mFrameMax - mFrameMin);
+            float x = ImLerp(rc.Min.x, rc.Max.x, r);
+            draw_list->AddLine(ImVec2(x, rc.Min.y + 6), ImVec2(x, rc.Max.y - 4), 0xAA000000, 4.f);
+         }
+      }
+      draw_list->PopClipRect();
+   }
+};
+
+//
+//
+// GraphEditor interface
+//
+//
+
+
+template <typename T, std::size_t N>
+struct Array
+{
+   T data[N];
+   const size_t size() const { return N; }
+
+   const T operator [] (size_t index) const { return data[index]; }
+   operator T* () {
+      T* p = new T[N];
+      memcpy(p, data, sizeof(data));
+      return p;
+   }
+};
+
+template <typename T, typename ... U> Array(T, U...)->Array<T, 1 + sizeof...(U)>;
+
+struct GraphEditorDelegate : public GraphEditor::Delegate
+{
+   bool AllowedLink(GraphEditor::NodeIndex from, GraphEditor::NodeIndex to) override
+   {
+      return true;
+   }
+
+   void SelectNode(GraphEditor::NodeIndex nodeIndex, bool selected) override
+   {
+      mNodes[nodeIndex].mSelected = selected;
+   }
+
+   void MoveSelectedNodes(const ImVec2 delta) override
+   {
+      for (auto& node : mNodes)
+      {
+         if (!node.mSelected)
+         {
+            continue;
+         }
+         node.x += delta.x;
+         node.y += delta.y;
+      }
+   }
+
+   virtual void RightClick(GraphEditor::NodeIndex nodeIndex, GraphEditor::SlotIndex slotIndexInput, GraphEditor::SlotIndex slotIndexOutput) override
+   {
+   }
+
+   void AddLink(GraphEditor::NodeIndex inputNodeIndex, GraphEditor::SlotIndex inputSlotIndex, GraphEditor::NodeIndex outputNodeIndex, GraphEditor::SlotIndex outputSlotIndex) override
+   {
+      mLinks.push_back({ inputNodeIndex, inputSlotIndex, outputNodeIndex, outputSlotIndex });
+   }
+
+   void DelLink(GraphEditor::LinkIndex linkIndex) override
+   {
+      mLinks.erase(mLinks.begin() + linkIndex);
+   }
+
+   void CustomDraw(ImDrawList* drawList, ImRect rectangle, GraphEditor::NodeIndex nodeIndex) override
+   {
+      drawList->AddLine(rectangle.Min, rectangle.Max, IM_COL32(0, 0, 0, 255));
+      drawList->AddText(rectangle.Min, IM_COL32(255, 128, 64, 255), "Draw");
+   }
+
+   const size_t GetTemplateCount() override
+   {
+      return sizeof(mTemplates) / sizeof(GraphEditor::Template);
+   }
+
+   const GraphEditor::Template GetTemplate(GraphEditor::TemplateIndex index) override
+   {
+      return mTemplates[index];
+   }
+
+   const size_t GetNodeCount() override
+   {
+      return mNodes.size();
+   }
+
+   const GraphEditor::Node GetNode(GraphEditor::NodeIndex index) override
+   {
+      const auto& myNode = mNodes[index];
+      return GraphEditor::Node
+      {
+          myNode.name,
+          myNode.templateIndex,
+          ImRect(ImVec2(myNode.x, myNode.y), ImVec2(myNode.x + 200, myNode.y + 200)),
+          myNode.mSelected
+      };
+   }
+
+   const size_t GetLinkCount() override
+   {
+      return mLinks.size();
+   }
+
+   const GraphEditor::Link GetLink(GraphEditor::LinkIndex index) override
+   {
+      return mLinks[index];
+   }
+
+   // Graph datas
+   static const inline GraphEditor::Template mTemplates[] = {
+       {
+           IM_COL32(160, 160, 180, 255),
+           IM_COL32(100, 100, 140, 255),
+           IM_COL32(110, 110, 150, 255),
+           1,
+           Array{"MyInput"},
+           nullptr,
+           2,
+           Array{"MyOutput0", "MyOuput1"},
+           nullptr
+       },
+
+       {
+           IM_COL32(180, 160, 160, 255),
+           IM_COL32(140, 100, 100, 255),
+           IM_COL32(150, 110, 110, 255),
+           3,
+           nullptr,
+           Array{ IM_COL32(200,100,100,255), IM_COL32(100,200,100,255), IM_COL32(100,100,200,255) },
+           1,
+           Array{"MyOutput0"},
+           Array{ IM_COL32(200,200,200,255)}
+       }
+   };
+
+   struct Node
+   {
+      const char* name;
+      GraphEditor::TemplateIndex templateIndex;
+      float x, y;
+      bool mSelected;
+   };
+
+   std::vector<Node> mNodes = {
+       {
+           "My Node 0",
+           0,
+           0, 0,
+           false
+       },
+
+       {
+           "My Node 1",
+           0,
+           400, 0,
+           false
+       },
+
+       {
+           "My Node 2",
+           1,
+           400, 400,
+           false
+       }
+   };
+
+   std::vector<GraphEditor::Link> mLinks = { {0, 0, 1, 0} };
+};
+
+
+int main(int, char**)
+{
+   ImApp::ImApp imApp;
+
+   ImApp::Config config;
+   config.mWidth = 1280;
+   config.mHeight = 720;
+   //config.mFullscreen = true;
+   imApp.Init(config);
+
+   int lastUsing = 0;
+
+   float cameraView[16] =
+   { 1.f, 0.f, 0.f, 0.f,
+     0.f, 1.f, 0.f, 0.f,
+     0.f, 0.f, 1.f, 0.f,
+     0.f, 0.f, 0.f, 1.f };
+
+   float cameraProjection[16];
+
+   // build a procedural texture. Copy/pasted and adapted from https://rosettacode.org/wiki/Plasma_effect#Graphics_version
+   unsigned int procTexture;
+   glGenTextures(1, &procTexture);
+   glBindTexture(GL_TEXTURE_2D, procTexture);
+   uint32_t* tempBitmap = new uint32_t[256 * 256];
+   int index = 0;
+   for (int y = 0; y < 256; y++)
+   {
+      for (int x = 0; x < 256; x++)
+      {
+         float dx = x + .5f;
+         float dy = y + .5f;
+         float dv = sinf(x * 0.02f) + sinf(0.03f * (x + y)) + sinf(sqrtf(0.4f * (dx * dx + dy * dy) + 1.f));
+
+         tempBitmap[index] = 0xFF000000 +
+         (int(255 * fabsf(sinf(dv * 3.141592f))) << 16) +
+         (int(255 * fabsf(sinf(dv * 3.141592f + 2 * 3.141592f / 3))) << 8) + 
+         (int(255 * fabs(sin(dv * 3.141592f + 4.f * 3.141592f / 3.f))));
+
+         index++;
+      }
+   }
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, tempBitmap);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   delete [] tempBitmap;
+
+   // sequence with default values
+   MySequence mySequence;
+   mySequence.mFrameMin = -100;
+   mySequence.mFrameMax = 1000;
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 0, 10, 30, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 1, 20, 30, true });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 3, 12, 60, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 2, 61, 90, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 4, 90, 99, false });
+
+   // Camera projection
+   bool isPerspective = true;
+   float fov = 27.f;
+   float viewWidth = 10.f; // for orthographic
+   float camYAngle = 165.f / 180.f * 3.14159f;
+   float camXAngle = 32.f / 180.f * 3.14159f;
+
+   bool firstFrame = true;
+
+   // Main loop
+   while (!imApp.Done())
+   {
+      imApp.NewFrame();
+
+      ImGuiIO& io = ImGui::GetIO();
+      if (isPerspective)
+      {
+         Perspective(fov, io.DisplaySize.x / io.DisplaySize.y, 0.1f, 100.f, cameraProjection);
+      }
+      else
+      {
+         float viewHeight = viewWidth * io.DisplaySize.y / io.DisplaySize.x;
+         OrthoGraphic(-viewWidth, viewWidth, -viewHeight, viewHeight, 1000.f, -1000.f, cameraProjection);
+      }
+      ImGuizmo::SetOrthographic(!isPerspective);
+      ImGuizmo::BeginFrame();
+
+      ImGui::SetNextWindowPos(ImVec2(1024, 100), ImGuiCond_Appearing);
+      ImGui::SetNextWindowSize(ImVec2(256, 256), ImGuiCond_Appearing);
+
+      // create a window and insert the inspector
+      ImGui::SetNextWindowPos(ImVec2(10, 10), ImGuiCond_Appearing);
+      ImGui::SetNextWindowSize(ImVec2(320, 340), ImGuiCond_Appearing);
+      ImGui::Begin("Editor");
+      if (ImGui::RadioButton("Full view", !useWindow)) useWindow = false;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Window", useWindow)) useWindow = true;
+
+      ImGui::Text("Camera");
+      bool viewDirty = false;
+      if (ImGui::RadioButton("Perspective", isPerspective)) isPerspective = true;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Orthographic", !isPerspective)) isPerspective = false;
+      if (isPerspective)
+      {
+         ImGui::SliderFloat("Fov", &fov, 20.f, 110.f);
+      }
+      else
+      {
+         ImGui::SliderFloat("Ortho width", &viewWidth, 1, 20);
+      }
+      viewDirty |= ImGui::SliderFloat("Distance", &camDistance, 1.f, 10.f);
+      ImGui::SliderInt("Gizmo count", &gizmoCount, 1, 4);
+
+      if (viewDirty || firstFrame)
+      {
+         float eye[] = { cosf(camYAngle) * cosf(camXAngle) * camDistance, sinf(camXAngle) * camDistance, sinf(camYAngle) * cosf(camXAngle) * camDistance };
+         float at[] = { 0.f, 0.f, 0.f };
+         float up[] = { 0.f, 1.f, 0.f };
+         LookAt(eye, at, up, cameraView);
+         firstFrame = false;
+      }
+
+      ImGui::Text("X: %f Y: %f", io.MousePos.x, io.MousePos.y);
+      if (ImGuizmo::IsUsing())
+      {
+         ImGui::Text("Using gizmo");
+      }
+      else
+      {
+         ImGui::Text(ImGuizmo::IsOver()?"Over gizmo":"");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::TRANSLATE) ? "Over translate gizmo" : "");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::ROTATE) ? "Over rotate gizmo" : "");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::SCALE) ? "Over scale gizmo" : "");
+      }
+      ImGui::Separator();
+      
+      TransformStart(cameraView, cameraProjection, objectMatrix[lastUsing]);
+      for (int matId = 0; matId < gizmoCount; matId++)
+      {
+          ImGuizmo::PushID(matId);
+      
+          EditTransform(cameraView, cameraProjection, objectMatrix[matId]);
+          if (ImGuizmo::IsUsing())
+          {
+              lastUsing = matId;
+          }
+          ImGuizmo::PopID();
+      }
+      TransformEnd();
+
+      ImGui::End();
+
+      ImGui::SetNextWindowPos(ImVec2(10, 350), ImGuiCond_Appearing);
+
+      ImGui::SetNextWindowSize(ImVec2(940, 480), ImGuiCond_Appearing);
+      ImGui::Begin("Other controls");
+      if (ImGui::CollapsingHeader("Zoom Slider"))
+      {
+         static float uMin = 0.4f, uMax = 0.6f;
+         static float vMin = 0.4f, vMax = 0.6f;
+         ImGui::Image((ImTextureID)(uint64_t)procTexture, ImVec2(900,300), ImVec2(uMin, vMin), ImVec2(uMax, vMax));
+         {
+            ImGui::SameLine();
+            ImGui::PushID(18);
+            ImZoomSlider::ImZoomSlider(0.f, 1.f, vMin, vMax, 0.01f, ImZoomSlider::ImGuiZoomSliderFlags_Vertical);
+            ImGui::PopID();
+         }
+      
+         {
+            ImGui::PushID(19);
+            ImZoomSlider::ImZoomSlider(0.f, 1.f, uMin, uMax);
+            ImGui::PopID();
+         }
+      }
+      if (ImGui::CollapsingHeader("Sequencer"))
+      {
+         // let's create the sequencer
+         static int selectedEntry = -1;
+         static int firstFrame = 0;
+         static bool expanded = true;
+         static int currentFrame = 100;
+
+         ImGui::PushItemWidth(130);
+         ImGui::InputInt("Frame Min", &mySequence.mFrameMin);
+         ImGui::SameLine();
+         ImGui::InputInt("Frame ", &currentFrame);
+         ImGui::SameLine();
+         ImGui::InputInt("Frame Max", &mySequence.mFrameMax);
+         ImGui::PopItemWidth();
+         Sequencer(&mySequence, &currentFrame, &expanded, &selectedEntry, &firstFrame, ImSequencer::SEQUENCER_EDIT_STARTEND | ImSequencer::SEQUENCER_ADD | ImSequencer::SEQUENCER_DEL | ImSequencer::SEQUENCER_COPYPASTE | ImSequencer::SEQUENCER_CHANGE_FRAME);
+         // add a UI to edit that particular item
+         if (selectedEntry != -1)
+         {
+           const MySequence::MySequenceItem &item = mySequence.myItems[selectedEntry];
+           ImGui::Text("I am a %s, please edit me", SequencerItemTypeNames[item.mType]);
+           // switch (type) ....
+         }
+      }
+
+      // Graph Editor
+      static GraphEditor::Options options;
+      static GraphEditorDelegate delegate;
+      static GraphEditor::ViewState viewState;
+      static GraphEditor::FitOnScreen fit = GraphEditor::Fit_None;
+      static bool showGraphEditor = true;
+
+      if (ImGui::CollapsingHeader("Graph Editor"))
+      {
+         ImGui::Checkbox("Show GraphEditor", &showGraphEditor);
+         GraphEditor::EditOptions(options);
+      }
+
+      ImGui::End();
+
+      if (showGraphEditor)
+      {
+         ImGui::Begin("Graph Editor", NULL, 0);
+         if (ImGui::Button("Fit all nodes"))
+         {
+            fit = GraphEditor::Fit_AllNodes;
+         }
+         ImGui::SameLine();
+         if (ImGui::Button("Fit selected nodes"))
+         {
+            fit = GraphEditor::Fit_SelectedNodes;
+         }
+         GraphEditor::Show(delegate, options, viewState, true, &fit);
+
+         ImGui::End();
+      }
+
+      // render everything
+      glClearColor(0.45f, 0.4f, 0.4f, 1.f);
+      glClear(GL_COLOR_BUFFER_BIT);
+      imApp.EndFrame();
+   }
+
+   imApp.Finish();
+
+   return 0;
+}

src/ThirdParty/ImGuizmo/vcpkg-example/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(vcpkg-example)
+
+add_definitions(-DSTB_IMAGE_IMPLEMENTATION)
+find_path(STB_INCLUDE_DIRS "stb.h")
+
+find_package(imgui     CONFIG REQUIRED)
+find_package(imguizmo  CONFIG REQUIRED)
+
+add_executable(example-app)
+
+target_sources(example-app PRIVATE main.cpp)
+
+target_compile_options(example-app PRIVATE "/std:c++17")
+
+target_include_directories(example-app PRIVATE
+    ${STB_INCLUDE_DIRS}
+)
+
+target_link_libraries(example-app PRIVATE
+    imgui::imgui
+    imguizmo::imguizmo
+)

src/ThirdParty/ImGuizmo/vcpkg-example/README.md

@@ -0,0 +1,52 @@
+# ImGuizmo example
+
+ImGuizmo example app that uses [cmake][cmake] and [vcpkg][vcpkg]
+
+## Setup
+
+Assuming cmake and vcpkg are installed, all that is required is to add the vcpkg toolchain file to
+the cmake configure and all dependencies will be downloaded and installed into the project
+
+```bash
+mkdir build
+cd build
+cmake .. -DCMAKE_TOOLCHAIN_FILE=C:/dev/vcpkg/scripts/buildsystem/vcpkg.cmake
+```
+
+### Visual Studio
+
+Rather than running directly, IDEs usually configure the cmake. Visual studio can be integrated
+directly with the `vcpkg integrate install` command or by specifying the path to the toolchain file
+in the project cmake settings
+
+### VSCode
+
+When using the cmake tools extension the command can be added to the `.vscode/settings.json` file as
+follows
+
+```json
+{
+    "cmake.configureArgs": [
+        "-DCMAKE_TOOLCHAIN_FILE=C:\\dev\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake"
+    ]
+}
+```
+
+> :heavy_check_mark: If you include the settings file in your repo, a good practice would be to use
+an environment variable for the path to the vcpkg install and variable substitution in the toolchain
+file path so the settings work across machines. eg `"-DCMAKE_TOOLCHAIN_FILE={$env:VCPKG_ROOT}\\scripts\\buildsystems\\vcpkg.cmake"`
+
+This can also be added to the system-wide settings rather than added to each project individually
+
+## How It Works
+
+The example contains a `vcpkg.json` manifest file that contains the dependencices. When cmake is
+supplied with the vcpkg toolchain file, the script detects this manifest file and then downloads and
+compiles the dependencies there-in
+
+In `CMakeLists.txt` the `find_package(imguizmo CONFIG REQUIRED)` command finds the cmake config
+added by the vcpkg install and `target_link_libraries(example-app PRIVATE imguizmo::imguizmo)` adds
+the includes and lib to the target
+
+[cmake]: https://cmake.org/
+[vcpkg]: https://github.com/microsoft/vcpkg

src/ThirdParty/ImGuizmo/vcpkg-example/imgui.ini

@@ -0,0 +1,25 @@
+[Window][Debug##Default]
+Pos=60,60
+Size=400,400
+Collapsed=0
+
+[Window][Editor]
+Pos=10,10
+Size=320,340
+Collapsed=0
+
+[Window][Graph Editor]
+Pos=976,359
+Size=1325,844
+Collapsed=0
+
+[Window][Other controls]
+Pos=10,350
+Size=940,480
+Collapsed=0
+
+[Window][Gizmo]
+Pos=400,20
+Size=800,400
+Collapsed=0
+

src/ThirdParty/ImGuizmo/vcpkg-example/main.cpp

@@ -0,0 +1,888 @@
+#define IMGUI_DEFINE_MATH_OPERATORS
+#include "imgui.h"
+#include "imgui_internal.h"
+#define IMAPP_IMPL
+#include "ImApp.h"
+
+#include "ImGuizmo.h"
+#include "ImSequencer.h"
+#include "ImZoomSlider.h"
+#include "ImCurveEdit.h"
+#include "GraphEditor.h"
+
+#include <cmath>
+#include <vector>
+#include <algorithm>
+
+bool useWindow = true;
+int gizmoCount = 1;
+float camDistance = 8.f;
+static ImGuizmo::OPERATION mCurrentGizmoOperation(ImGuizmo::TRANSLATE);
+
+float objectMatrix[4][16] = {
+  { 1.f, 0.f, 0.f, 0.f,
+    0.f, 1.f, 0.f, 0.f,
+    0.f, 0.f, 1.f, 0.f,
+    0.f, 0.f, 0.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  2.f, 0.f, 0.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  2.f, 0.f, 2.f, 1.f },
+
+  { 1.f, 0.f, 0.f, 0.f,
+  0.f, 1.f, 0.f, 0.f,
+  0.f, 0.f, 1.f, 0.f,
+  0.f, 0.f, 2.f, 1.f }
+};
+
+static const float identityMatrix[16] =
+{ 1.f, 0.f, 0.f, 0.f,
+    0.f, 1.f, 0.f, 0.f,
+    0.f, 0.f, 1.f, 0.f,
+    0.f, 0.f, 0.f, 1.f };
+
+void Frustum(float left, float right, float bottom, float top, float znear, float zfar, float* m16)
+{
+   float temp, temp2, temp3, temp4;
+   temp = 2.0f * znear;
+   temp2 = right - left;
+   temp3 = top - bottom;
+   temp4 = zfar - znear;
+   m16[0] = temp / temp2;
+   m16[1] = 0.0;
+   m16[2] = 0.0;
+   m16[3] = 0.0;
+   m16[4] = 0.0;
+   m16[5] = temp / temp3;
+   m16[6] = 0.0;
+   m16[7] = 0.0;
+   m16[8] = (right + left) / temp2;
+   m16[9] = (top + bottom) / temp3;
+   m16[10] = (-zfar - znear) / temp4;
+   m16[11] = -1.0f;
+   m16[12] = 0.0;
+   m16[13] = 0.0;
+   m16[14] = (-temp * zfar) / temp4;
+   m16[15] = 0.0;
+}
+
+void Perspective(float fovyInDegrees, float aspectRatio, float znear, float zfar, float* m16)
+{
+   float ymax, xmax;
+   ymax = znear * tanf(fovyInDegrees * 3.141592f / 180.0f);
+   xmax = ymax * aspectRatio;
+   Frustum(-xmax, xmax, -ymax, ymax, znear, zfar, m16);
+}
+
+void Cross(const float* a, const float* b, float* r)
+{
+   r[0] = a[1] * b[2] - a[2] * b[1];
+   r[1] = a[2] * b[0] - a[0] * b[2];
+   r[2] = a[0] * b[1] - a[1] * b[0];
+}
+
+float Dot(const float* a, const float* b)
+{
+   return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+}
+
+void Normalize(const float* a, float* r)
+{
+   float il = 1.f / (sqrtf(Dot(a, a)) + FLT_EPSILON);
+   r[0] = a[0] * il;
+   r[1] = a[1] * il;
+   r[2] = a[2] * il;
+}
+
+void LookAt(const float* eye, const float* at, const float* up, float* m16)
+{
+   float X[3], Y[3], Z[3], tmp[3];
+
+   tmp[0] = eye[0] - at[0];
+   tmp[1] = eye[1] - at[1];
+   tmp[2] = eye[2] - at[2];
+   Normalize(tmp, Z);
+   Normalize(up, Y);
+
+   Cross(Y, Z, tmp);
+   Normalize(tmp, X);
+
+   Cross(Z, X, tmp);
+   Normalize(tmp, Y);
+
+   m16[0] = X[0];
+   m16[1] = Y[0];
+   m16[2] = Z[0];
+   m16[3] = 0.0f;
+   m16[4] = X[1];
+   m16[5] = Y[1];
+   m16[6] = Z[1];
+   m16[7] = 0.0f;
+   m16[8] = X[2];
+   m16[9] = Y[2];
+   m16[10] = Z[2];
+   m16[11] = 0.0f;
+   m16[12] = -Dot(X, eye);
+   m16[13] = -Dot(Y, eye);
+   m16[14] = -Dot(Z, eye);
+   m16[15] = 1.0f;
+}
+
+void OrthoGraphic(const float l, float r, float b, const float t, float zn, const float zf, float* m16)
+{
+   m16[0] = 2 / (r - l);
+   m16[1] = 0.0f;
+   m16[2] = 0.0f;
+   m16[3] = 0.0f;
+   m16[4] = 0.0f;
+   m16[5] = 2 / (t - b);
+   m16[6] = 0.0f;
+   m16[7] = 0.0f;
+   m16[8] = 0.0f;
+   m16[9] = 0.0f;
+   m16[10] = 1.0f / (zf - zn);
+   m16[11] = 0.0f;
+   m16[12] = (l + r) / (l - r);
+   m16[13] = (t + b) / (b - t);
+   m16[14] = zn / (zn - zf);
+   m16[15] = 1.0f;
+}
+
+inline void rotationY(const float angle, float* m16)
+{
+   float c = cosf(angle);
+   float s = sinf(angle);
+
+   m16[0] = c;
+   m16[1] = 0.0f;
+   m16[2] = -s;
+   m16[3] = 0.0f;
+   m16[4] = 0.0f;
+   m16[5] = 1.f;
+   m16[6] = 0.0f;
+   m16[7] = 0.0f;
+   m16[8] = s;
+   m16[9] = 0.0f;
+   m16[10] = c;
+   m16[11] = 0.0f;
+   m16[12] = 0.f;
+   m16[13] = 0.f;
+   m16[14] = 0.f;
+   m16[15] = 1.0f;
+}
+
+void EditTransform(float* cameraView, float* cameraProjection, float* matrix, bool editTransformDecomposition)
+{
+   static ImGuizmo::MODE mCurrentGizmoMode(ImGuizmo::LOCAL);
+   static bool useSnap = false;
+   static float snap[3] = { 1.f, 1.f, 1.f };
+   static float bounds[] = { -0.5f, -0.5f, -0.5f, 0.5f, 0.5f, 0.5f };
+   static float boundsSnap[] = { 0.1f, 0.1f, 0.1f };
+   static bool boundSizing = false;
+   static bool boundSizingSnap = false;
+
+   if (editTransformDecomposition)
+   {
+      if (ImGui::IsKeyPressed(90))
+         mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+      if (ImGui::IsKeyPressed(69))
+         mCurrentGizmoOperation = ImGuizmo::ROTATE;
+      if (ImGui::IsKeyPressed(82)) // r Key
+         mCurrentGizmoOperation = ImGuizmo::SCALE;
+      if (ImGui::RadioButton("Translate", mCurrentGizmoOperation == ImGuizmo::TRANSLATE))
+         mCurrentGizmoOperation = ImGuizmo::TRANSLATE;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Rotate", mCurrentGizmoOperation == ImGuizmo::ROTATE))
+         mCurrentGizmoOperation = ImGuizmo::ROTATE;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Scale", mCurrentGizmoOperation == ImGuizmo::SCALE))
+         mCurrentGizmoOperation = ImGuizmo::SCALE;
+      float matrixTranslation[3], matrixRotation[3], matrixScale[3];
+      ImGuizmo::DecomposeMatrixToComponents(matrix, matrixTranslation, matrixRotation, matrixScale);
+      ImGui::InputFloat3("Tr", matrixTranslation);
+      ImGui::InputFloat3("Rt", matrixRotation);
+      ImGui::InputFloat3("Sc", matrixScale);
+      ImGuizmo::RecomposeMatrixFromComponents(matrixTranslation, matrixRotation, matrixScale, matrix);
+
+      if (mCurrentGizmoOperation != ImGuizmo::SCALE)
+      {
+         if (ImGui::RadioButton("Local", mCurrentGizmoMode == ImGuizmo::LOCAL))
+            mCurrentGizmoMode = ImGuizmo::LOCAL;
+         ImGui::SameLine();
+         if (ImGui::RadioButton("World", mCurrentGizmoMode == ImGuizmo::WORLD))
+            mCurrentGizmoMode = ImGuizmo::WORLD;
+      }
+      if (ImGui::IsKeyPressed(83))
+         useSnap = !useSnap;
+      ImGui::Checkbox("", &useSnap);
+      ImGui::SameLine();
+
+      switch (mCurrentGizmoOperation)
+      {
+      case ImGuizmo::TRANSLATE:
+         ImGui::InputFloat3("Snap", &snap[0]);
+         break;
+      case ImGuizmo::ROTATE:
+         ImGui::InputFloat("Angle Snap", &snap[0]);
+         break;
+      case ImGuizmo::SCALE:
+         ImGui::InputFloat("Scale Snap", &snap[0]);
+         break;
+      }
+      ImGui::Checkbox("Bound Sizing", &boundSizing);
+      if (boundSizing)
+      {
+         ImGui::PushID(3);
+         ImGui::Checkbox("", &boundSizingSnap);
+         ImGui::SameLine();
+         ImGui::InputFloat3("Snap", boundsSnap);
+         ImGui::PopID();
+      }
+   }
+
+   ImGuiIO& io = ImGui::GetIO();
+   float viewManipulateRight = io.DisplaySize.x;
+   float viewManipulateTop = 0;
+   if (useWindow)
+   {
+      ImGui::SetNextWindowSize(ImVec2(800, 400));
+      ImGui::SetNextWindowPos(ImVec2(400,20));
+      ImGui::PushStyleColor(ImGuiCol_WindowBg, (ImVec4)ImColor(0.35f, 0.3f, 0.3f));
+      ImGui::Begin("Gizmo", 0, ImGuiWindowFlags_NoMove);
+      ImGuizmo::SetDrawlist();
+      float windowWidth = (float)ImGui::GetWindowWidth();
+      float windowHeight = (float)ImGui::GetWindowHeight();
+      ImGuizmo::SetRect(ImGui::GetWindowPos().x, ImGui::GetWindowPos().y, windowWidth, windowHeight);
+      viewManipulateRight = ImGui::GetWindowPos().x + windowWidth;
+      viewManipulateTop = ImGui::GetWindowPos().y;
+   }
+   else
+   {
+      ImGuizmo::SetRect(0, 0, io.DisplaySize.x, io.DisplaySize.y);
+   }
+
+   ImGuizmo::DrawGrid(cameraView, cameraProjection, identityMatrix, 100.f);
+   ImGuizmo::DrawCubes(cameraView, cameraProjection, &objectMatrix[0][0], gizmoCount);
+   ImGuizmo::Manipulate(cameraView, cameraProjection, mCurrentGizmoOperation, mCurrentGizmoMode, matrix, NULL, useSnap ? &snap[0] : NULL, boundSizing ? bounds : NULL, boundSizingSnap ? boundsSnap : NULL);
+
+   ImGuizmo::ViewManipulate(cameraView, camDistance, ImVec2(viewManipulateRight - 128, viewManipulateTop), ImVec2(128, 128), 0x10101010);
+
+   if (useWindow)
+   {
+      ImGui::End();
+      ImGui::PopStyleColor(1);
+   }
+}
+
+//
+//
+// ImSequencer interface
+//
+//
+static const char* SequencerItemTypeNames[] = { "Camera","Music", "ScreenEffect", "FadeIn", "Animation" };
+
+struct RampEdit : public ImCurveEdit::Delegate
+{
+   RampEdit()
+   {
+      mPts[0][0] = ImVec2(-10.f, 0);
+      mPts[0][1] = ImVec2(20.f, 0.6f);
+      mPts[0][2] = ImVec2(25.f, 0.2f);
+      mPts[0][3] = ImVec2(70.f, 0.4f);
+      mPts[0][4] = ImVec2(120.f, 1.f);
+      mPointCount[0] = 5;
+
+      mPts[1][0] = ImVec2(-50.f, 0.2f);
+      mPts[1][1] = ImVec2(33.f, 0.7f);
+      mPts[1][2] = ImVec2(80.f, 0.2f);
+      mPts[1][3] = ImVec2(82.f, 0.8f);
+      mPointCount[1] = 4;
+
+
+      mPts[2][0] = ImVec2(40.f, 0);
+      mPts[2][1] = ImVec2(60.f, 0.1f);
+      mPts[2][2] = ImVec2(90.f, 0.82f);
+      mPts[2][3] = ImVec2(150.f, 0.24f);
+      mPts[2][4] = ImVec2(200.f, 0.34f);
+      mPts[2][5] = ImVec2(250.f, 0.12f);
+      mPointCount[2] = 6;
+      mbVisible[0] = mbVisible[1] = mbVisible[2] = true;
+      mMax = ImVec2(1.f, 1.f);
+      mMin = ImVec2(0.f, 0.f);
+   }
+   size_t GetCurveCount()
+   {
+      return 3;
+   }
+
+   bool IsVisible(size_t curveIndex)
+   {
+      return mbVisible[curveIndex];
+   }
+   size_t GetPointCount(size_t curveIndex)
+   {
+      return mPointCount[curveIndex];
+   }
+
+   uint32_t GetCurveColor(size_t curveIndex)
+   {
+      uint32_t cols[] = { 0xFF0000FF, 0xFF00FF00, 0xFFFF0000 };
+      return cols[curveIndex];
+   }
+   ImVec2* GetPoints(size_t curveIndex)
+   {
+      return mPts[curveIndex];
+   }
+   virtual ImCurveEdit::CurveType GetCurveType(size_t curveIndex) const { return ImCurveEdit::CurveSmooth; }
+   virtual int EditPoint(size_t curveIndex, int pointIndex, ImVec2 value)
+   {
+      mPts[curveIndex][pointIndex] = ImVec2(value.x, value.y);
+      SortValues(curveIndex);
+      for (size_t i = 0; i < GetPointCount(curveIndex); i++)
+      {
+         if (mPts[curveIndex][i].x == value.x)
+            return (int)i;
+      }
+      return pointIndex;
+   }
+   virtual void AddPoint(size_t curveIndex, ImVec2 value)
+   {
+      if (mPointCount[curveIndex] >= 8)
+         return;
+      mPts[curveIndex][mPointCount[curveIndex]++] = value;
+      SortValues(curveIndex);
+   }
+   virtual ImVec2& GetMax() { return mMax; }
+   virtual ImVec2& GetMin() { return mMin; }
+   virtual unsigned int GetBackgroundColor() { return 0; }
+   ImVec2 mPts[3][8];
+   size_t mPointCount[3];
+   bool mbVisible[3];
+   ImVec2 mMin;
+   ImVec2 mMax;
+private:
+   void SortValues(size_t curveIndex)
+   {
+      auto b = std::begin(mPts[curveIndex]);
+      auto e = std::begin(mPts[curveIndex]) + GetPointCount(curveIndex);
+      std::sort(b, e, [](ImVec2 a, ImVec2 b) { return a.x < b.x; });
+
+   }
+};
+
+struct MySequence : public ImSequencer::SequenceInterface
+{
+   // interface with sequencer
+
+   virtual int GetFrameMin() const {
+      return mFrameMin;
+   }
+   virtual int GetFrameMax() const {
+      return mFrameMax;
+   }
+   virtual int GetItemCount() const { return (int)myItems.size(); }
+
+   virtual int GetItemTypeCount() const { return sizeof(SequencerItemTypeNames) / sizeof(char*); }
+   virtual const char* GetItemTypeName(int typeIndex) const { return SequencerItemTypeNames[typeIndex]; }
+   virtual const char* GetItemLabel(int index) const
+   {
+      static char tmps[512];
+      snprintf(tmps, 512, "[%02d] %s", index, SequencerItemTypeNames[myItems[index].mType]);
+      return tmps;
+   }
+
+   virtual void Get(int index, int** start, int** end, int* type, unsigned int* color)
+   {
+      MySequenceItem& item = myItems[index];
+      if (color)
+         *color = 0xFFAA8080; // same color for everyone, return color based on type
+      if (start)
+         *start = &item.mFrameStart;
+      if (end)
+         *end = &item.mFrameEnd;
+      if (type)
+         *type = item.mType;
+   }
+   virtual void Add(int type) { myItems.push_back(MySequenceItem{ type, 0, 10, false }); };
+   virtual void Del(int index) { myItems.erase(myItems.begin() + index); }
+   virtual void Duplicate(int index) { myItems.push_back(myItems[index]); }
+
+   virtual size_t GetCustomHeight(int index) { return myItems[index].mExpanded ? 300 : 0; }
+
+   // my datas
+   MySequence() : mFrameMin(0), mFrameMax(0) {}
+   int mFrameMin, mFrameMax;
+   struct MySequenceItem
+   {
+      int mType;
+      int mFrameStart, mFrameEnd;
+      bool mExpanded;
+   };
+   std::vector<MySequenceItem> myItems;
+   RampEdit rampEdit;
+
+   virtual void DoubleClick(int index) {
+      if (myItems[index].mExpanded)
+      {
+         myItems[index].mExpanded = false;
+         return;
+      }
+      for (auto& item : myItems)
+         item.mExpanded = false;
+      myItems[index].mExpanded = !myItems[index].mExpanded;
+   }
+
+   virtual void CustomDraw(int index, ImDrawList* draw_list, const ImRect& rc, const ImRect& legendRect, const ImRect& clippingRect, const ImRect& legendClippingRect)
+   {
+      static const char* labels[] = { "Translation", "Rotation" , "Scale" };
+
+      rampEdit.mMax = ImVec2(float(mFrameMax), 1.f);
+      rampEdit.mMin = ImVec2(float(mFrameMin), 0.f);
+      draw_list->PushClipRect(legendClippingRect.Min, legendClippingRect.Max, true);
+      for (int i = 0; i < 3; i++)
+      {
+         ImVec2 pta(legendRect.Min.x + 30, legendRect.Min.y + i * 14.f);
+         ImVec2 ptb(legendRect.Max.x, legendRect.Min.y + (i + 1) * 14.f);
+         draw_list->AddText(pta, rampEdit.mbVisible[i] ? 0xFFFFFFFF : 0x80FFFFFF, labels[i]);
+         if (ImRect(pta, ptb).Contains(ImGui::GetMousePos()) && ImGui::IsMouseClicked(0))
+            rampEdit.mbVisible[i] = !rampEdit.mbVisible[i];
+      }
+      draw_list->PopClipRect();
+
+      ImGui::SetCursorScreenPos(rc.Min);
+      ImCurveEdit::Edit(rampEdit, rc.Max - rc.Min, 137 + index, &clippingRect);
+   }
+
+   virtual void CustomDrawCompact(int index, ImDrawList* draw_list, const ImRect& rc, const ImRect& clippingRect)
+   {
+      rampEdit.mMax = ImVec2(float(mFrameMax), 1.f);
+      rampEdit.mMin = ImVec2(float(mFrameMin), 0.f);
+      draw_list->PushClipRect(clippingRect.Min, clippingRect.Max, true);
+      for (int i = 0; i < 3; i++)
+      {
+         for (int j = 0; j < rampEdit.mPointCount[i]; j++)
+         {
+            float p = rampEdit.mPts[i][j].x;
+            if (p < myItems[index].mFrameStart || p > myItems[index].mFrameEnd)
+               continue;
+            float r = (p - mFrameMin) / float(mFrameMax - mFrameMin);
+            float x = ImLerp(rc.Min.x, rc.Max.x, r);
+            draw_list->AddLine(ImVec2(x, rc.Min.y + 6), ImVec2(x, rc.Max.y - 4), 0xAA000000, 4.f);
+         }
+      }
+      draw_list->PopClipRect();
+   }
+};
+
+//
+//
+// GraphEditor interface
+//
+//
+
+
+template <typename T, std::size_t N>
+struct Array
+{
+   T data[N];
+   const size_t size() const { return N; }
+
+   const T operator [] (size_t index) const { return data[index]; }
+   operator T* () {
+      T* p = new T[N];
+      memcpy(p, data, sizeof(data));
+      return p;
+   }
+};
+
+template <typename T, typename ... U>
+Array(T, U...) -> Array<T, 1 + sizeof...(U)>;
+
+struct GraphEditorDelegate : public GraphEditor::Delegate
+{
+   bool AllowedLink(GraphEditor::NodeIndex from, GraphEditor::NodeIndex to) override
+   {
+      return true;
+   }
+
+   void SelectNode(GraphEditor::NodeIndex nodeIndex, bool selected) override
+   {
+      mNodes[nodeIndex].mSelected = selected;
+   }
+
+   void MoveSelectedNodes(const ImVec2 delta) override
+   {
+      for (auto& node : mNodes)
+      {
+         if (!node.mSelected)
+         {
+            continue;
+         }
+         node.x += delta.x;
+         node.y += delta.y;
+      }
+   }
+
+   virtual void RightClick(GraphEditor::NodeIndex nodeIndex, GraphEditor::SlotIndex slotIndexInput, GraphEditor::SlotIndex slotIndexOutput) override
+   {
+   }
+
+   void AddLink(GraphEditor::NodeIndex inputNodeIndex, GraphEditor::SlotIndex inputSlotIndex, GraphEditor::NodeIndex outputNodeIndex, GraphEditor::SlotIndex outputSlotIndex) override
+   {
+      mLinks.push_back({ inputNodeIndex, inputSlotIndex, outputNodeIndex, outputSlotIndex });
+   }
+
+   void DelLink(GraphEditor::LinkIndex linkIndex) override
+   {
+      mLinks.erase(mLinks.begin() + linkIndex);
+   }
+
+   void CustomDraw(ImDrawList* drawList, ImRect rectangle, GraphEditor::NodeIndex nodeIndex) override
+   {
+      drawList->AddLine(rectangle.Min, rectangle.Max, IM_COL32(0, 0, 0, 255));
+      drawList->AddText(rectangle.Min, IM_COL32(255, 128, 64, 255), "Draw");
+   }
+
+   const size_t GetTemplateCount() override
+   {
+      return sizeof(mTemplates) / sizeof(GraphEditor::Template);
+   }
+
+   const GraphEditor::Template GetTemplate(GraphEditor::TemplateIndex index) override
+   {
+      return mTemplates[index];
+   }
+
+   const size_t GetNodeCount() override
+   {
+      return mNodes.size();
+   }
+
+   const GraphEditor::Node GetNode(GraphEditor::NodeIndex index) override
+   {
+      const auto& myNode = mNodes[index];
+      return GraphEditor::Node
+      {
+          myNode.name,
+          myNode.templateIndex,
+          ImRect(ImVec2(myNode.x, myNode.y), ImVec2(myNode.x + 200, myNode.y + 200)),
+          myNode.mSelected
+      };
+   }
+
+   const size_t GetLinkCount() override
+   {
+      return mLinks.size();
+   }
+
+   const GraphEditor::Link GetLink(GraphEditor::LinkIndex index) override
+   {
+      return mLinks[index];
+   }
+
+   // Graph datas
+   static const inline GraphEditor::Template mTemplates[] = {
+       {
+           IM_COL32(160, 160, 180, 255),
+           IM_COL32(100, 100, 140, 255),
+           IM_COL32(110, 110, 150, 255),
+           1,
+           Array{"MyInput"},
+           nullptr,
+           2,
+           Array{"MyOutput0", "MyOuput1"},
+           nullptr
+       },
+
+       {
+           IM_COL32(180, 160, 160, 255),
+           IM_COL32(140, 100, 100, 255),
+           IM_COL32(150, 110, 110, 255),
+           3,
+           nullptr,
+           Array{ IM_COL32(200,100,100,255), IM_COL32(100,200,100,255), IM_COL32(100,100,200,255) },
+           1,
+           Array{"MyOutput0"},
+           Array{ IM_COL32(200,200,200,255)}
+       }
+   };
+
+   struct Node
+   {
+      const char* name;
+      GraphEditor::TemplateIndex templateIndex;
+      float x, y;
+      bool mSelected;
+   };
+
+   std::vector<Node> mNodes = {
+       {
+           "My Node 0",
+           0,
+           0, 0,
+           false
+       },
+
+       {
+           "My Node 1",
+           0,
+           400, 0,
+           false
+       },
+
+       {
+           "My Node 2",
+           1,
+           400, 400,
+           false
+       }
+   };
+
+   std::vector<GraphEditor::Link> mLinks = { {0, 0, 1, 0} };
+};
+
+
+int main(int, char**)
+{
+   ImApp::ImApp imApp;
+
+   ImApp::Config config;
+   config.mWidth = 1280;
+   config.mHeight = 720;
+   //config.mFullscreen = true;
+   imApp.Init(config);
+
+   int lastUsing = 0;
+
+   float cameraView[16] =
+   { 1.f, 0.f, 0.f, 0.f,
+     0.f, 1.f, 0.f, 0.f,
+     0.f, 0.f, 1.f, 0.f,
+     0.f, 0.f, 0.f, 1.f };
+
+   float cameraProjection[16];
+
+   // build a procedural texture. Copy/pasted and adapted from https://rosettacode.org/wiki/Plasma_effect#Graphics_version
+   unsigned int procTexture;
+   glGenTextures(1, &procTexture);
+   glBindTexture(GL_TEXTURE_2D, procTexture);
+   uint32_t* tempBitmap = new uint32_t[256 * 256];
+   int index = 0;
+   for (int y = 0; y < 256; y++)
+   {
+      for (int x = 0; x < 256; x++)
+      {
+         float dx = x + .5f;
+         float dy = y + .5f;
+         float dv = sinf(x * 0.02f) + sinf(0.03f * (x + y)) + sinf(sqrtf(0.4f * (dx * dx + dy * dy) + 1.f));
+
+         tempBitmap[index] = 0xFF000000 +
+         (int(255 * fabsf(sinf(dv * 3.141592f))) << 16) +
+         (int(255 * fabsf(sinf(dv * 3.141592f + 2 * 3.141592f / 3))) << 8) +
+         (int(255 * fabs(sin(dv * 3.141592f + 4.f * 3.141592f / 3.f))));
+
+         index++;
+      }
+   }
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, tempBitmap);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   delete [] tempBitmap;
+
+   // sequence with default values
+   MySequence mySequence;
+   mySequence.mFrameMin = -100;
+   mySequence.mFrameMax = 1000;
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 0, 10, 30, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 1, 20, 30, true });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 3, 12, 60, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 2, 61, 90, false });
+   mySequence.myItems.push_back(MySequence::MySequenceItem{ 4, 90, 99, false });
+
+   // Camera projection
+   bool isPerspective = true;
+   float fov = 27.f;
+   float viewWidth = 10.f; // for orthographic
+   float camYAngle = 165.f / 180.f * 3.14159f;
+   float camXAngle = 32.f / 180.f * 3.14159f;
+
+   bool firstFrame = true;
+
+   // Main loop
+   while (!imApp.Done())
+   {
+      imApp.NewFrame();
+
+      ImGuiIO& io = ImGui::GetIO();
+      if (isPerspective)
+      {
+         Perspective(fov, io.DisplaySize.x / io.DisplaySize.y, 0.1f, 100.f, cameraProjection);
+      }
+      else
+      {
+         float viewHeight = viewWidth * io.DisplaySize.y / io.DisplaySize.x;
+         OrthoGraphic(-viewWidth, viewWidth, -viewHeight, viewHeight, 1000.f, -1000.f, cameraProjection);
+      }
+      ImGuizmo::SetOrthographic(!isPerspective);
+      ImGuizmo::BeginFrame();
+
+      ImGui::SetNextWindowPos(ImVec2(1024, 100));
+      ImGui::SetNextWindowSize(ImVec2(256, 256));
+
+      // create a window and insert the inspector
+      ImGui::SetNextWindowPos(ImVec2(10, 10));
+      ImGui::SetNextWindowSize(ImVec2(320, 340));
+      ImGui::Begin("Editor");
+      if (ImGui::RadioButton("Full view", !useWindow)) useWindow = false;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Window", useWindow)) useWindow = true;
+
+      ImGui::Text("Camera");
+      bool viewDirty = false;
+      if (ImGui::RadioButton("Perspective", isPerspective)) isPerspective = true;
+      ImGui::SameLine();
+      if (ImGui::RadioButton("Orthographic", !isPerspective)) isPerspective = false;
+      if (isPerspective)
+      {
+         ImGui::SliderFloat("Fov", &fov, 20.f, 110.f);
+      }
+      else
+      {
+         ImGui::SliderFloat("Ortho width", &viewWidth, 1, 20);
+      }
+      viewDirty |= ImGui::SliderFloat("Distance", &camDistance, 1.f, 10.f);
+      ImGui::SliderInt("Gizmo count", &gizmoCount, 1, 4);
+
+      if (viewDirty || firstFrame)
+      {
+         float eye[] = { cosf(camYAngle) * cosf(camXAngle) * camDistance, sinf(camXAngle) * camDistance, sinf(camYAngle) * cosf(camXAngle) * camDistance };
+         float at[] = { 0.f, 0.f, 0.f };
+         float up[] = { 0.f, 1.f, 0.f };
+         LookAt(eye, at, up, cameraView);
+         firstFrame = false;
+      }
+
+      ImGui::Text("X: %f Y: %f", io.MousePos.x, io.MousePos.y);
+      if (ImGuizmo::IsUsing())
+      {
+         ImGui::Text("Using gizmo");
+      }
+      else
+      {
+         ImGui::Text(ImGuizmo::IsOver()?"Over gizmo":"");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::TRANSLATE) ? "Over translate gizmo" : "");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::ROTATE) ? "Over rotate gizmo" : "");
+         ImGui::SameLine();
+         ImGui::Text(ImGuizmo::IsOver(ImGuizmo::SCALE) ? "Over scale gizmo" : "");
+      }
+      ImGui::Separator();
+      for (int matId = 0; matId < gizmoCount; matId++)
+      {
+         ImGuizmo::SetID(matId);
+
+         EditTransform(cameraView, cameraProjection, objectMatrix[matId], lastUsing == matId);
+         if (ImGuizmo::IsUsing())
+         {
+            lastUsing = matId;
+         }
+      }
+
+      ImGui::End();
+
+      ImGui::SetNextWindowPos(ImVec2(10, 350));
+
+      ImGui::SetNextWindowSize(ImVec2(940, 480));
+      ImGui::Begin("Other controls");
+      if (ImGui::CollapsingHeader("Zoom Slider"))
+      {
+         static float uMin = 0.4f, uMax = 0.6f;
+         static float vMin = 0.4f, vMax = 0.6f;
+         ImGui::Image((ImTextureID)(uint64_t)procTexture, ImVec2(900,300), ImVec2(uMin, vMin), ImVec2(uMax, vMax));
+         {
+            ImGui::SameLine();
+            ImGui::PushID(18);
+            ImZoomSlider::ImZoomSlider(0.f, 1.f, vMin, vMax, 0.01f, ImZoomSlider::ImGuiZoomSliderFlags_Vertical);
+            ImGui::PopID();
+         }
+
+         {
+            ImGui::PushID(19);
+            ImZoomSlider::ImZoomSlider(0.f, 1.f, uMin, uMax);
+            ImGui::PopID();
+         }
+      }
+      if (ImGui::CollapsingHeader("Sequencer"))
+      {
+         // let's create the sequencer
+         static int selectedEntry = -1;
+         static int firstFrame = 0;
+         static bool expanded = true;
+         static int currentFrame = 100;
+
+         ImGui::PushItemWidth(130);
+         ImGui::InputInt("Frame Min", &mySequence.mFrameMin);
+         ImGui::SameLine();
+         ImGui::InputInt("Frame ", &currentFrame);
+         ImGui::SameLine();
+         ImGui::InputInt("Frame Max", &mySequence.mFrameMax);
+         ImGui::PopItemWidth();
+         Sequencer(&mySequence, &currentFrame, &expanded, &selectedEntry, &firstFrame, ImSequencer::SEQUENCER_EDIT_STARTEND | ImSequencer::SEQUENCER_ADD | ImSequencer::SEQUENCER_DEL | ImSequencer::SEQUENCER_COPYPASTE | ImSequencer::SEQUENCER_CHANGE_FRAME);
+         // add a UI to edit that particular item
+         if (selectedEntry != -1)
+         {
+           const MySequence::MySequenceItem &item = mySequence.myItems[selectedEntry];
+           ImGui::Text("I am a %s, please edit me", SequencerItemTypeNames[item.mType]);
+           // switch (type) ....
+         }
+      }
+
+      // Graph Editor
+      static GraphEditor::Options options;
+      static GraphEditorDelegate delegate;
+      static GraphEditor::ViewState viewState;
+      static GraphEditor::FitOnScreen fit = GraphEditor::Fit_None;
+      static bool showGraphEditor = true;
+
+      if (ImGui::CollapsingHeader("Graph Editor"))
+      {
+         ImGui::Checkbox("Show GraphEditor", &showGraphEditor);
+         GraphEditor::EditOptions(options);
+      }
+
+      ImGui::End();
+
+      if (showGraphEditor)
+      {
+         ImGui::Begin("Graph Editor", NULL, 0);
+         if (ImGui::Button("Fit all nodes"))
+         {
+            fit = GraphEditor::Fit_AllNodes;
+         }
+         ImGui::SameLine();
+         if (ImGui::Button("Fit selected nodes"))
+         {
+            fit = GraphEditor::Fit_SelectedNodes;
+         }
+         GraphEditor::Show(delegate, options, viewState, true, &fit);
+
+         ImGui::End();
+      }
+
+
+      // render everything
+      glClearColor(0.45f, 0.4f, 0.4f, 1.f);
+      glClear(GL_COLOR_BUFFER_BIT);
+      imApp.EndFrame();
+   }
+
+   imApp.Finish();
+
+   return 0;
+}

src/ThirdParty/ImGuizmo/vcpkg-example/vcpkg.json

@@ -0,0 +1,9 @@
+{
+    "name": "vcpkg-example",
+    "version": "1.83",
+    "dependencies": [
+        "imgui",
+        "imguizmo",
+        "stb"
+    ]
+}

src/ThirdParty/glad/KHR/khrplatform.h

@@ -0,0 +1,311 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

src/ThirdParty/glfw/CMake/GenerateMappings.cmake

@@ -0,0 +1,48 @@
+# Usage:
+# cmake -P GenerateMappings.cmake <path/to/mappings.h.in> <path/to/mappings.h>
+
+set(source_url "https://raw.githubusercontent.com/gabomdq/SDL_GameControllerDB/master/gamecontrollerdb.txt")
+set(source_path "${CMAKE_CURRENT_BINARY_DIR}/gamecontrollerdb.txt")
+set(template_path "${CMAKE_ARGV3}")
+set(target_path "${CMAKE_ARGV4}")
+
+if (NOT EXISTS "${template_path}")
+    message(FATAL_ERROR "Failed to find template file ${template_path}")
+endif()
+
+file(DOWNLOAD "${source_url}" "${source_path}"
+     STATUS download_status
+     TLS_VERIFY on)
+
+list(GET download_status 0 status_code)
+list(GET download_status 1 status_message)
+
+if (status_code)
+    message(FATAL_ERROR "Failed to download ${source_url}: ${status_message}")
+endif()
+
+file(STRINGS "${source_path}" lines)
+foreach(line ${lines})
+    if (line MATCHES "^[0-9a-fA-F]")
+        if (line MATCHES "platform:Windows")
+            if (GLFW_WIN32_MAPPINGS)
+                string(APPEND GLFW_WIN32_MAPPINGS "\n")
+            endif()
+            string(APPEND GLFW_WIN32_MAPPINGS "\"${line}\",")
+        elseif (line MATCHES "platform:Mac OS X")
+            if (GLFW_COCOA_MAPPINGS)
+                string(APPEND GLFW_COCOA_MAPPINGS "\n")
+            endif()
+            string(APPEND GLFW_COCOA_MAPPINGS "\"${line}\",")
+        elseif (line MATCHES "platform:Linux")
+            if (GLFW_LINUX_MAPPINGS)
+                string(APPEND GLFW_LINUX_MAPPINGS "\n")
+            endif()
+            string(APPEND GLFW_LINUX_MAPPINGS "\"${line}\",")
+        endif()
+    endif()
+endforeach()
+
+configure_file("${template_path}" "${target_path}" @ONLY NEWLINE_STYLE UNIX)
+file(REMOVE "${source_path}")
+

src/ThirdParty/glfw/CMake/Info.plist.in

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>${MACOSX_BUNDLE_EXECUTABLE_NAME}</string>
+	<key>CFBundleGetInfoString</key>
+	<string>${MACOSX_BUNDLE_INFO_STRING}</string>
+	<key>CFBundleIconFile</key>
+	<string>${MACOSX_BUNDLE_ICON_FILE}</string>
+	<key>CFBundleIdentifier</key>
+	<string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleLongVersionString</key>
+	<string>${MACOSX_BUNDLE_LONG_VERSION_STRING}</string>
+	<key>CFBundleName</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>${MACOSX_BUNDLE_SHORT_VERSION_STRING}</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
+	<key>CSResourcesFileMapped</key>
+	<true/>
+	<key>LSRequiresCarbon</key>
+	<true/>
+	<key>NSHumanReadableCopyright</key>
+	<string>${MACOSX_BUNDLE_COPYRIGHT}</string>
+	<key>NSHighResolutionCapable</key>
+	<true/>
+</dict>
+</plist>

src/ThirdParty/glfw/CMake/cmake_uninstall.cmake.in

@@ -0,0 +1,29 @@
+
+if (NOT EXISTS "@GLFW_BINARY_DIR@/install_manifest.txt")
+    message(FATAL_ERROR "Cannot find install manifest: \"@GLFW_BINARY_DIR@/install_manifest.txt\"")
+endif()
+
+file(READ "@GLFW_BINARY_DIR@/install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+
+foreach (file ${files})
+  message(STATUS "Uninstalling \"$ENV{DESTDIR}${file}\"")
+  if (EXISTS "$ENV{DESTDIR}${file}")
+    exec_program("@CMAKE_COMMAND@" ARGS "-E remove \"$ENV{DESTDIR}${file}\""
+                 OUTPUT_VARIABLE rm_out
+                 RETURN_VALUE rm_retval)
+    if (NOT "${rm_retval}" STREQUAL 0)
+      MESSAGE(FATAL_ERROR "Problem when removing \"$ENV{DESTDIR}${file}\"")
+    endif()
+  elseif (IS_SYMLINK "$ENV{DESTDIR}${file}")
+    EXEC_PROGRAM("@CMAKE_COMMAND@" ARGS "-E remove \"$ENV{DESTDIR}${file}\""
+                 OUTPUT_VARIABLE rm_out
+                 RETURN_VALUE rm_retval)
+    if (NOT "${rm_retval}" STREQUAL 0)
+      message(FATAL_ERROR "Problem when removing symlink \"$ENV{DESTDIR}${file}\"")
+    endif()
+  else()
+    message(STATUS "File \"$ENV{DESTDIR}${file}\" does not exist.")
+  endif()
+endforeach()
+

src/ThirdParty/glfw/CMake/glfw3.pc.in

@@ -0,0 +1,13 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+
+Name: GLFW
+Description: A multi-platform library for OpenGL, window and input
+Version: @GLFW_VERSION@
+URL: https://www.glfw.org/
+Requires.private: @GLFW_PKG_CONFIG_REQUIRES_PRIVATE@
+Libs: -L${libdir} -l@GLFW_LIB_NAME@
+Libs.private: @GLFW_PKG_CONFIG_LIBS_PRIVATE@
+Cflags: -I${includedir}

src/ThirdParty/glfw/CMake/glfw3Config.cmake.in

@@ -0,0 +1,3 @@
+include(CMakeFindDependencyMacro)
+find_dependency(Threads)
+include("${CMAKE_CURRENT_LIST_DIR}/glfw3Targets.cmake")

src/ThirdParty/glfw/CMake/i686-w64-mingw32-clang.cmake

@@ -0,0 +1,13 @@
+# Define the environment for cross-compiling with 32-bit MinGW-w64 Clang
+SET(CMAKE_SYSTEM_NAME    Windows) # Target system name
+SET(CMAKE_SYSTEM_VERSION 1)
+SET(CMAKE_C_COMPILER     "i686-w64-mingw32-clang")
+SET(CMAKE_CXX_COMPILER   "i686-w64-mingw32-clang++")
+SET(CMAKE_RC_COMPILER    "i686-w64-mingw32-windres")
+SET(CMAKE_RANLIB         "i686-w64-mingw32-ranlib")
+
+# Configure the behaviour of the find commands
+SET(CMAKE_FIND_ROOT_PATH "/usr/i686-w64-mingw32")
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

src/ThirdParty/glfw/CMake/i686-w64-mingw32.cmake

@@ -0,0 +1,13 @@
+# Define the environment for cross-compiling with 32-bit MinGW-w64 GCC
+SET(CMAKE_SYSTEM_NAME    Windows) # Target system name
+SET(CMAKE_SYSTEM_VERSION 1)
+SET(CMAKE_C_COMPILER     "i686-w64-mingw32-gcc")
+SET(CMAKE_CXX_COMPILER   "i686-w64-mingw32-g++")
+SET(CMAKE_RC_COMPILER    "i686-w64-mingw32-windres")
+SET(CMAKE_RANLIB         "i686-w64-mingw32-ranlib")
+
+# Configure the behaviour of the find commands
+SET(CMAKE_FIND_ROOT_PATH "/usr/i686-w64-mingw32")
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

src/ThirdParty/glfw/CMake/modules/FindEpollShim.cmake

@@ -0,0 +1,17 @@
+# Find EpollShim
+# Once done, this will define
+#
+#   EPOLLSHIM_FOUND - System has EpollShim
+#   EPOLLSHIM_INCLUDE_DIRS - The EpollShim include directories
+#   EPOLLSHIM_LIBRARIES - The libraries needed to use EpollShim
+
+find_path(EPOLLSHIM_INCLUDE_DIRS NAMES sys/epoll.h sys/timerfd.h HINTS /usr/local/include/libepoll-shim)
+find_library(EPOLLSHIM_LIBRARIES NAMES epoll-shim libepoll-shim HINTS /usr/local/lib)
+
+if (EPOLLSHIM_INCLUDE_DIRS AND EPOLLSHIM_LIBRARIES)
+	set(EPOLLSHIM_FOUND TRUE)
+endif (EPOLLSHIM_INCLUDE_DIRS AND EPOLLSHIM_LIBRARIES)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(EpollShim DEFAULT_MSG EPOLLSHIM_LIBRARIES EPOLLSHIM_INCLUDE_DIRS)
+mark_as_advanced(EPOLLSHIM_INCLUDE_DIRS EPOLLSHIM_LIBRARIES)

src/ThirdParty/glfw/CMake/modules/FindOSMesa.cmake

@@ -0,0 +1,18 @@
+# Try to find OSMesa on a Unix system
+#
+# This will define:
+#
+#   OSMESA_LIBRARIES   - Link these to use OSMesa
+#   OSMESA_INCLUDE_DIR - Include directory for OSMesa
+#
+# Copyright (c) 2014 Brandon Schaefer <brandon.schaefer@canonical.com>
+
+if (NOT WIN32)
+
+  find_package (PkgConfig)
+  pkg_check_modules (PKG_OSMESA QUIET osmesa)
+
+  set (OSMESA_INCLUDE_DIR ${PKG_OSMESA_INCLUDE_DIRS})
+  set (OSMESA_LIBRARIES   ${PKG_OSMESA_LIBRARIES})
+
+endif ()

src/ThirdParty/glfw/CMake/x86_64-w64-mingw32-clang.cmake

@@ -0,0 +1,13 @@
+# Define the environment for cross-compiling with 64-bit MinGW-w64 Clang
+SET(CMAKE_SYSTEM_NAME    Windows) # Target system name
+SET(CMAKE_SYSTEM_VERSION 1)
+SET(CMAKE_C_COMPILER     "x86_64-w64-mingw32-clang")
+SET(CMAKE_CXX_COMPILER   "x86_64-w64-mingw32-clang++")
+SET(CMAKE_RC_COMPILER    "x86_64-w64-mingw32-windres")
+SET(CMAKE_RANLIB         "x86_64-w64-mingw32-ranlib")
+
+# Configure the behaviour of the find commands
+SET(CMAKE_FIND_ROOT_PATH "/usr/x86_64-w64-mingw32")
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

src/ThirdParty/glfw/CMake/x86_64-w64-mingw32.cmake

@@ -0,0 +1,13 @@
+# Define the environment for cross-compiling with 64-bit MinGW-w64 GCC
+SET(CMAKE_SYSTEM_NAME    Windows) # Target system name
+SET(CMAKE_SYSTEM_VERSION 1)
+SET(CMAKE_C_COMPILER     "x86_64-w64-mingw32-gcc")
+SET(CMAKE_CXX_COMPILER   "x86_64-w64-mingw32-g++")
+SET(CMAKE_RC_COMPILER    "x86_64-w64-mingw32-windres")
+SET(CMAKE_RANLIB         "x86_64-w64-mingw32-ranlib")
+
+# Configure the behaviour of the find commands
+SET(CMAKE_FIND_ROOT_PATH "/usr/x86_64-w64-mingw32")
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

src/ThirdParty/glfw/CMakeLists.txt

@@ -0,0 +1,179 @@
+cmake_minimum_required(VERSION 3.4...3.20 FATAL_ERROR)
+
+project(GLFW VERSION 3.4.0 LANGUAGES C)
+
+set(CMAKE_LEGACY_CYGWIN_WIN32 OFF)
+
+if (POLICY CMP0054)
+    cmake_policy(SET CMP0054 NEW)
+endif()
+
+if (POLICY CMP0069)
+    cmake_policy(SET CMP0069 NEW)
+endif()
+
+if (POLICY CMP0077)
+    cmake_policy(SET CMP0077 NEW)
+endif()
+
+set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+
+if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+    set(GLFW_STANDALONE TRUE)
+endif()
+
+option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
+option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" ${GLFW_STANDALONE})
+option(GLFW_BUILD_TESTS "Build the GLFW test programs" ${GLFW_STANDALONE})
+option(GLFW_BUILD_DOCS "Build the GLFW documentation" ON)
+option(GLFW_INSTALL "Generate installation target" ON)
+
+include(GNUInstallDirs)
+include(CMakeDependentOption)
+
+if (GLFW_USE_OSMESA)
+    message(FATAL_ERROR "GLFW_USE_OSMESA has been removed; set the GLFW_PLATFORM init hint")
+endif()
+
+cmake_dependent_option(GLFW_BUILD_WIN32 "Build support for Win32" ON "WIN32" OFF)
+cmake_dependent_option(GLFW_BUILD_COCOA "Build support for Cocoa" ON "APPLE" OFF)
+cmake_dependent_option(GLFW_BUILD_X11 "Build support for X11" ON "UNIX;NOT APPLE" OFF)
+cmake_dependent_option(GLFW_BUILD_WAYLAND "Build support for Wayland"
+    "${GLFW_USE_WAYLAND}" "UNIX;NOT APPLE" OFF)
+
+cmake_dependent_option(GLFW_USE_HYBRID_HPG "Force use of high-performance GPU on hybrid systems" OFF
+                       "WIN32" OFF)
+cmake_dependent_option(USE_MSVC_RUNTIME_LIBRARY_DLL "Use MSVC runtime library DLL" ON
+                       "MSVC" OFF)
+
+set(GLFW_LIBRARY_TYPE "${GLFW_LIBRARY_TYPE}" CACHE STRING
+    "Library type override for GLFW (SHARED, STATIC, OBJECT, or empty to follow BUILD_SHARED_LIBS)")
+
+if (GLFW_LIBRARY_TYPE)
+    if (GLFW_LIBRARY_TYPE STREQUAL "SHARED")
+        set(GLFW_BUILD_SHARED_LIBRARY TRUE)
+    else()
+        set(GLFW_BUILD_SHARED_LIBRARY FALSE)
+    endif()
+else()
+    set(GLFW_BUILD_SHARED_LIBRARY ${BUILD_SHARED_LIBS})
+endif()
+
+list(APPEND CMAKE_MODULE_PATH "${GLFW_SOURCE_DIR}/CMake/modules")
+
+find_package(Threads REQUIRED)
+
+if (GLFW_BUILD_DOCS)
+    set(DOXYGEN_SKIP_DOT TRUE)
+    find_package(Doxygen)
+endif()
+
+#--------------------------------------------------------------------
+# Report backend selection
+#--------------------------------------------------------------------
+if (GLFW_BUILD_WIN32)
+    message(STATUS "Including Win32 support")
+endif()
+if (GLFW_BUILD_COCOA)
+    message(STATUS "Including Cocoa support")
+endif()
+if (GLFW_BUILD_WAYLAND)
+    message(STATUS "Including Wayland support")
+endif()
+if (GLFW_BUILD_X11)
+    message(STATUS "Including X11 support")
+endif()
+
+#--------------------------------------------------------------------
+# Apply Microsoft C runtime library option
+# This is here because it also applies to tests and examples
+#--------------------------------------------------------------------
+if (MSVC AND NOT USE_MSVC_RUNTIME_LIBRARY_DLL)
+    if (CMAKE_VERSION VERSION_LESS 3.15)
+        foreach (flag CMAKE_C_FLAGS
+                      CMAKE_C_FLAGS_DEBUG
+                      CMAKE_C_FLAGS_RELEASE
+                      CMAKE_C_FLAGS_MINSIZEREL
+                      CMAKE_C_FLAGS_RELWITHDEBINFO)
+
+            if (flag MATCHES "/MD")
+                string(REGEX REPLACE "/MD" "/MT" ${flag} "${${flag}}")
+            endif()
+            if (flag MATCHES "/MDd")
+                string(REGEX REPLACE "/MDd" "/MTd" ${flag} "${${flag}}")
+            endif()
+
+        endforeach()
+    else()
+        set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+    endif()
+endif()
+
+#--------------------------------------------------------------------
+# Create generated files
+#--------------------------------------------------------------------
+include(CMakePackageConfigHelpers)
+
+set(GLFW_CONFIG_PATH "${CMAKE_INSTALL_LIBDIR}/cmake/glfw3")
+
+configure_package_config_file(CMake/glfw3Config.cmake.in
+                              src/glfw3Config.cmake
+                              INSTALL_DESTINATION "${GLFW_CONFIG_PATH}"
+                              NO_CHECK_REQUIRED_COMPONENTS_MACRO)
+
+write_basic_package_version_file(src/glfw3ConfigVersion.cmake
+                                 VERSION ${GLFW_VERSION}
+                                 COMPATIBILITY SameMajorVersion)
+
+#--------------------------------------------------------------------
+# Add subdirectories
+#--------------------------------------------------------------------
+add_subdirectory(src)
+
+if (GLFW_BUILD_EXAMPLES)
+    add_subdirectory(examples)
+endif()
+
+if (GLFW_BUILD_TESTS)
+    add_subdirectory(tests)
+endif()
+
+if (DOXYGEN_FOUND AND GLFW_BUILD_DOCS)
+    add_subdirectory(docs)
+endif()
+
+#--------------------------------------------------------------------
+# Install files other than the library
+# The library is installed by src/CMakeLists.txt
+#--------------------------------------------------------------------
+if (GLFW_INSTALL)
+    install(DIRECTORY include/GLFW DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+            FILES_MATCHING PATTERN glfw3.h PATTERN glfw3native.h)
+
+    install(FILES "${GLFW_BINARY_DIR}/src/glfw3Config.cmake"
+                  "${GLFW_BINARY_DIR}/src/glfw3ConfigVersion.cmake"
+            DESTINATION "${GLFW_CONFIG_PATH}")
+
+    install(EXPORT glfwTargets FILE glfw3Targets.cmake
+            EXPORT_LINK_INTERFACE_LIBRARIES
+            DESTINATION "${GLFW_CONFIG_PATH}")
+    install(FILES "${GLFW_BINARY_DIR}/src/glfw3.pc"
+            DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+    if (DOXYGEN_FOUND AND GLFW_BUILD_DOCS)
+        install(DIRECTORY "${GLFW_BINARY_DIR}/docs/html"
+                DESTINATION "${CMAKE_INSTALL_DOCDIR}")
+    endif()
+
+    # Only generate this target if no higher-level project already has
+    if (NOT TARGET uninstall)
+        configure_file(CMake/cmake_uninstall.cmake.in
+                       cmake_uninstall.cmake IMMEDIATE @ONLY)
+
+        add_custom_target(uninstall
+                          "${CMAKE_COMMAND}" -P
+                          "${GLFW_BINARY_DIR}/cmake_uninstall.cmake")
+        set_target_properties(uninstall PROPERTIES FOLDER "GLFW3")
+    endif()
+endif()
+

src/ThirdParty/glfw/CONTRIBUTORS.md

@@ -0,0 +1,235 @@
+# Acknowledgements
+
+GLFW exists because people around the world donated their time and lent their
+skills.  This list only includes contributions to the main repository and
+excludes other invaluable contributions like language bindings and text and
+video tutorials.
+
+ - Bobyshev Alexander
+ - Laurent Aphecetche
+ - Matt Arsenault
+ - ashishgamedev
+ - David Avedissian
+ - Keith Bauer
+ - John Bartholomew
+ - Coşku Baş
+ - Niklas Behrens
+ - Andrew Belt
+ - Nevyn Bengtsson
+ - Niklas Bergström
+ - Denis Bernard
+ - Doug Binks
+ - blanco
+ - Waris Boonyasiriwat
+ - Kyle Brenneman
+ - Rok Breulj
+ - Kai Burjack
+ - Martin Capitanio
+ - Nicolas Caramelli
+ - David Carlier
+ - Arturo Castro
+ - Chi-kwan Chan
+ - Joseph Chua
+ - Ian Clarkson
+ - Michał Cichoń
+ - Lambert Clara
+ - Anna Clarke
+ - Josh Codd
+ - Yaron Cohen-Tal
+ - Omar Cornut
+ - Andrew Corrigan
+ - Bailey Cosier
+ - Noel Cower
+ - CuriouserThing
+ - Jason Daly
+ - Jarrod Davis
+ - Olivier Delannoy
+ - Paul R. Deppe
+ - Michael Dickens
+ - Роман Донченко
+ - Mario Dorn
+ - Wolfgang Draxinger
+ - Jonathan Dummer
+ - Ralph Eastwood
+ - Fredrik Ehnbom
+ - Robin Eklind
+ - Jan Ekström
+ - Siavash Eliasi
+ - Ahmad Fatoum
+ - Felipe Ferreira
+ - Michael Fogleman
+ - Jason Francis
+ - Gerald Franz
+ - Mário Freitas
+ - GeO4d
+ - Marcus Geelnard
+ - ghuser404
+ - Charles Giessen
+ - Ryan C. Gordon
+ - Stephen Gowen
+ - Kovid Goyal
+ - Eloi Marín Gratacós
+ - Stefan Gustavson
+ - Andrew Gutekanst
+ - Stephen Gutekanst
+ - Jonathan Hale
+ - hdf89shfdfs
+ - Sylvain Hellegouarch
+ - Matthew Henry
+ - heromyth
+ - Lucas Hinderberger
+ - Paul Holden
+ - Warren Hu
+ - Charles Huber
+ - InKryption
+ - IntellectualKitty
+ - Aaron Jacobs
+ - Erik S. V. Jansson
+ - Toni Jovanoski
+ - Arseny Kapoulkine
+ - Cem Karan
+ - Osman Keskin
+ - Koray Kilinc
+ - Josh Kilmer
+ - Byunghoon Kim
+ - Cameron King
+ - Peter Knut
+ - Christoph Kubisch
+ - Yuri Kunde Schlesner
+ - Rokas Kupstys
+ - Konstantin Käfer
+ - Eric Larson
+ - Francis Lecavalier
+ - Jong Won Lee
+ - Robin Leffmann
+ - Glenn Lewis
+ - Shane Liesegang
+ - Anders Lindqvist
+ - Leon Linhart
+ - Marco Lizza
+ - Eyal Lotem
+ - Aaron Loucks
+ - Luflosi
+ - lukect
+ - Tristam MacDonald
+ - Hans Mackowiak
+ - Дмитри Малышев
+ - Zbigniew Mandziejewicz
+ - Adam Marcus
+ - Célestin Marot
+ - Kyle McDonald
+ - David V. McKay
+ - David Medlock
+ - Bryce Mehring
+ - Jonathan Mercier
+ - Marcel Metz
+ - Liam Middlebrook
+ - Ave Milia
+ - Jonathan Miller
+ - Kenneth Miller
+ - Bruce Mitchener
+ - Jack Moffitt
+ - Jeff Molofee
+ - Alexander Monakov
+ - Pierre Morel
+ - Jon Morton
+ - Pierre Moulon
+ - Martins Mozeiko
+ - Pascal Muetschard
+ - Julian Møller
+ - ndogxj
+ - n3rdopolis
+ - Kristian Nielsen
+ - Kamil Nowakowski
+ - onox
+ - Denis Ovod
+ - Ozzy
+ - Andri Pálsson
+ - luz paz
+ - Peoro
+ - Braden Pellett
+ - Christopher Pelloux
+ - Arturo J. Pérez
+ - Vladimir Perminov
+ - Anthony Pesch
+ - Orson Peters
+ - Emmanuel Gil Peyrot
+ - Cyril Pichard
+ - Keith Pitt
+ - Stanislav Podgorskiy
+ - Konstantin Podsvirov
+ - Nathan Poirier
+ - Alexandre Pretyman
+ - Pablo Prietz
+ - przemekmirek
+ - pthom
+ - Guillaume Racicot
+ - Philip Rideout
+ - Eddie Ringle
+ - Max Risuhin
+ - Jorge Rodriguez
+ - Jari Ronkainen
+ - Luca Rood
+ - Ed Ropple
+ - Aleksey Rybalkin
+ - Mikko Rytkönen
+ - Riku Salminen
+ - Brandon Schaefer
+ - Sebastian Schuberth
+ - Christian Sdunek
+ - Matt Sealey
+ - Steve Sexton
+ - Arkady Shapkin
+ - Ali Sherief
+ - Yoshiki Shibukawa
+ - Dmitri Shuralyov
+ - Daniel Sieger
+ - Daniel Skorupski
+ - Anthony Smith
+ - Bradley Smith
+ - Cliff Smolinsky
+ - Patrick Snape
+ - Erlend Sogge Heggen
+ - Julian Squires
+ - Johannes Stein
+ - Pontus Stenetorp
+ - Michael Stocker
+ - Justin Stoecker
+ - Elviss Strazdins
+ - Paul Sultana
+ - Nathan Sweet
+ - TTK-Bandit
+ - Jared Tiala
+ - Sergey Tikhomirov
+ - Arthur Tombs
+ - Ioannis Tsakpinis
+ - Samuli Tuomola
+ - Matthew Turner
+ - urraka
+ - Elias Vanderstuyft
+ - Stef Velzel
+ - Jari Vetoniemi
+ - Ricardo Vieira
+ - Nicholas Vitovitch
+ - Simon Voordouw
+ - Corentin Wallez
+ - Torsten Walluhn
+ - Patrick Walton
+ - Xo Wang
+ - Jay Weisskopf
+ - Frank Wille
+ - Andy Williams
+ - Joel Winarske
+ - Richard A. Wilkes
+ - Tatsuya Yatagawa
+ - Ryogo Yoshimura
+ - Lukas Zanner
+ - Andrey Zholos
+ - Aihui Zhu
+ - Santi Zupancic
+ - Jonas Ådahl
+ - Lasse Öörni
+ - Leonard König
+ - All the unmentioned and anonymous contributors in the GLFW community, for bug
+   reports, patches, feedback, testing and encouragement
+

src/ThirdParty/glfw/LICENSE.md

@@ -0,0 +1,23 @@
+Copyright (c) 2002-2006 Marcus Geelnard
+
+Copyright (c) 2006-2019 Camilla Löwy
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would
+   be appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and must not
+   be misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+   distribution.
+

src/ThirdParty/glfw/README.md

@@ -0,0 +1,324 @@
+# GLFW
+
+[![Build status](https://github.com/glfw/glfw/actions/workflows/build.yml/badge.svg)](https://github.com/glfw/glfw/actions)
+[![Build status](https://ci.appveyor.com/api/projects/status/0kf0ct9831i5l6sp/branch/master?svg=true)](https://ci.appveyor.com/project/elmindreda/glfw)
+[![Coverity Scan](https://scan.coverity.com/projects/4884/badge.svg)](https://scan.coverity.com/projects/glfw-glfw)
+
+## Introduction
+
+GLFW is an Open Source, multi-platform library for OpenGL, OpenGL ES and Vulkan
+application development.  It provides a simple, platform-independent API for
+creating windows, contexts and surfaces, reading input, handling events, etc.
+
+GLFW natively supports Windows, macOS and Linux and other Unix-like systems.  On
+Linux both X11 and Wayland are supported.
+
+GLFW is licensed under the [zlib/libpng
+license](https://www.glfw.org/license.html).
+
+You can [download](https://www.glfw.org/download.html) the latest stable release
+as source or Windows binaries, or fetch the `latest` branch from GitHub.  Each
+release starting with 3.0 also has a corresponding [annotated
+tag](https://github.com/glfw/glfw/releases) with source and binary archives.
+
+The [documentation](https://www.glfw.org/docs/latest/) is available online and is
+included in all source and binary archives.  See the [release
+notes](https://www.glfw.org/docs/latest/news.html) for new features, caveats and
+deprecations in the latest release.  For more details see the [version
+history](https://www.glfw.org/changelog.html).
+
+The `master` branch is the stable integration branch and _should_ always compile
+and run on all supported platforms, although details of newly added features may
+change until they have been included in a release.  New features and many bug
+fixes live in [other branches](https://github.com/glfw/glfw/branches/all) until
+they are stable enough to merge.
+
+If you are new to GLFW, you may find the
+[tutorial](https://www.glfw.org/docs/latest/quick.html) for GLFW 3 useful.  If
+you have used GLFW 2 in the past, there is a [transition
+guide](https://www.glfw.org/docs/latest/moving.html) for moving to the GLFW
+3 API.
+
+GLFW exists because of the contributions of [many people](CONTRIBUTORS.md)
+around the world, whether by reporting bugs, providing community support, adding
+features, reviewing or testing code, debugging, proofreading docs, suggesting
+features or fixing bugs.
+
+
+## Compiling GLFW
+
+GLFW itself requires only the headers and libraries for your OS and window
+system.  It does not need the headers for any context creation API (WGL, GLX,
+EGL, NSGL, OSMesa) or rendering API (OpenGL, OpenGL ES, Vulkan) to enable
+support for them.
+
+GLFW supports compilation on Windows with Visual C++ 2010 and later, MinGW and
+MinGW-w64, on macOS with Clang and on Linux and other Unix-like systems with GCC
+and Clang.  It will likely compile in other environments as well, but this is
+not regularly tested.
+
+There are [pre-compiled Windows binaries](https://www.glfw.org/download.html)
+available for all supported compilers.
+
+See the [compilation guide](https://www.glfw.org/docs/latest/compile.html) for
+more information about how to compile GLFW yourself.
+
+
+## Using GLFW
+
+See the [documentation](https://www.glfw.org/docs/latest/) for tutorials, guides
+and the API reference.
+
+
+## Contributing to GLFW
+
+See the [contribution
+guide](https://github.com/glfw/glfw/blob/master/docs/CONTRIBUTING.md) for
+more information.
+
+
+## System requirements
+
+GLFW supports Windows XP and later and macOS 10.8 and later.  Linux and other
+Unix-like systems running the X Window System are supported even without
+a desktop environment or modern extensions, although some features require
+a running window or clipboard manager.  The OSMesa backend requires Mesa 6.3.
+
+See the [compatibility guide](https://www.glfw.org/docs/latest/compat.html)
+in the documentation for more information.
+
+
+## Dependencies
+
+GLFW itself needs only CMake 3.1 or later and the headers and libraries for your
+OS and window system.
+
+The examples and test programs depend on a number of tiny libraries.  These are
+located in the `deps/` directory.
+
+ - [getopt\_port](https://github.com/kimgr/getopt_port/) for examples
+   with command-line options
+ - [TinyCThread](https://github.com/tinycthread/tinycthread) for threaded
+   examples
+ - [glad2](https://github.com/Dav1dde/glad) for loading OpenGL and Vulkan
+   functions
+ - [linmath.h](https://github.com/datenwolf/linmath.h) for linear algebra in
+   examples
+ - [Nuklear](https://github.com/Immediate-Mode-UI/Nuklear) for test and example UI
+ - [stb\_image\_write](https://github.com/nothings/stb) for writing images to disk
+
+The documentation is generated with [Doxygen](https://doxygen.org/) if CMake can
+find that tool.
+
+
+## Reporting bugs
+
+Bugs are reported to our [issue tracker](https://github.com/glfw/glfw/issues).
+Please check the [contribution
+guide](https://github.com/glfw/glfw/blob/master/docs/CONTRIBUTING.md) for
+information on what to include when reporting a bug.
+
+
+## Changelog
+
+ - Added `GLFW_PLATFORM` init hint for runtime platform selection (#1958)
+ - Added `GLFW_ANY_PLATFORM`, `GLFW_PLATFORM_WIN32`, `GLFW_PLATFORM_COCOA`,
+   `GLFW_PLATFORM_WAYLAND`, `GLFW_PLATFORM_X11` and `GLFW_PLATFORM_NULL` symbols to
+   specify the desired platform (#1958)
+ - Added `glfwGetPlatform` function to query what platform was selected (#1655,#1958)
+ - Added `glfwPlatformSupported` function to query if a platform is supported
+   (#1655,#1958)
+ - Added `glfwInitAllocator` for setting a custom memory allocator (#544,#1628,#1947)
+ - Added `GLFWallocator` struct and `GLFWallocatefun`, `GLFWreallocatefun` and
+   `GLFWdeallocatefun` types (#544,#1628,#1947)
+ - Added `glfwInitVulkanLoader` for using a non-default Vulkan loader (#1374,#1890)
+ - Added `GLFW_RESIZE_NWSE_CURSOR`, `GLFW_RESIZE_NESW_CURSOR`,
+   `GLFW_RESIZE_ALL_CURSOR` and `GLFW_NOT_ALLOWED_CURSOR` cursor shapes (#427)
+ - Added `GLFW_RESIZE_EW_CURSOR` alias for `GLFW_HRESIZE_CURSOR` (#427)
+ - Added `GLFW_RESIZE_NS_CURSOR` alias for `GLFW_VRESIZE_CURSOR` (#427)
+ - Added `GLFW_POINTING_HAND_CURSOR` alias for `GLFW_HAND_CURSOR` (#427)
+ - Added `GLFW_MOUSE_PASSTHROUGH` window hint for letting mouse input pass
+   through the window (#1236,#1568)
+ - Added `GLFW_PLATFORM_UNAVAILABLE` error for platform detection failures (#1958)
+ - Added `GLFW_FEATURE_UNAVAILABLE` error for platform limitations (#1692)
+ - Added `GLFW_FEATURE_UNIMPLEMENTED` error for incomplete backends (#1692)
+ - Added `GLFW_ANGLE_PLATFORM_TYPE` init hint and `GLFW_ANGLE_PLATFORM_TYPE_*`
+   values to select ANGLE backend (#1380)
+ - Added `GLFW_X11_XCB_VULKAN_SURFACE` init hint for selecting X11 Vulkan
+   surface extension (#1793)
+ - Added `GLFW_BUILD_WIN32` CMake option for enabling Win32 support (#1958)
+ - Added `GLFW_BUILD_COCOA` CMake option for enabling Cocoa support (#1958)
+ - Added `GLFW_BUILD_X11` CMake option for enabling X11 support (#1958)
+ - Added `GLFW_LIBRARY_TYPE` CMake variable for overriding the library type
+   (#279,#1307,#1497,#1574,#1928)
+ - Added `GLFW_PKG_CONFIG_REQUIRES_PRIVATE` and `GLFW_PKG_CONFIG_LIBS_PRIVATE` CMake
+   variables exposing pkg-config dependencies (#1307)
+ - Made joystick subsystem initialize at first use (#1284,#1646)
+ - Made `GLFW_DOUBLEBUFFER` a read-only window attribute
+ - Updated the minimum required CMake version to 3.1
+ - Updated gamepad mappings from upstream
+ - Disabled tests and examples by default when built as a CMake subdirectory
+ - Renamed `GLFW_USE_WAYLAND` CMake option to `GLFW_BUILD_WAYLAND` (#1958)
+ - Removed `GLFW_USE_OSMESA` CMake option enabling the Null platform (#1958)
+ - Removed CMake generated configuration header
+ - Bugfix: The CMake config-file package used an absolute path and was not
+   relocatable (#1470)
+ - Bugfix: Video modes with a duplicate screen area were discarded (#1555,#1556)
+ - Bugfix: Compiling with -Wextra-semi caused warnings (#1440)
+ - Bugfix: Built-in mappings failed because some OEMs re-used VID/PID (#1583)
+ - Bugfix: Some extension loader headers did not prevent default OpenGL header
+   inclusion (#1695)
+ - Bugfix: Buffers were swapped at creation on single-buffered windows (#1873)
+ - Bugfix: Gamepad mapping updates could spam `GLFW_INVALID_VALUE` due to
+   incompatible controllers sharing hardware ID (#1763)
+ - Bugfix: Native access functions for context handles did not check that the API matched
+ - [Win32] Added the `GLFW_WIN32_KEYBOARD_MENU` window hint for enabling access
+           to the window menu
+ - [Win32] Added a version info resource to the GLFW DLL
+ - [Win32] Disabled framebuffer transparency on Windows 7 when DWM windows are
+   opaque (#1512)
+ - [Win32] Bugfix: `GLFW_INCLUDE_VULKAN` plus `VK_USE_PLATFORM_WIN32_KHR` caused
+   symbol redefinition (#1524)
+ - [Win32] Bugfix: The cursor position event was emitted before its cursor enter
+   event (#1490)
+ - [Win32] Bugfix: The window hint `GLFW_MAXIMIZED` did not move or resize the
+   window (#1499)
+ - [Win32] Bugfix: Disabled cursor mode interfered with some non-client actions
+ - [Win32] Bugfix: Super key was not released after Win+V hotkey (#1622)
+ - [Win32] Bugfix: `glfwGetKeyName` could access out of bounds and return an
+   invalid pointer
+ - [Win32] Bugfix: Some synthetic key events were reported as `GLFW_KEY_UNKNOWN`
+   (#1623)
+ - [Win32] Bugfix: Non-BMP Unicode codepoint input was reported as UTF-16
+ - [Win32] Bugfix: Monitor functions could return invalid values after
+   configuration change (#1761)
+ - [Win32] Bugfix: Initialization would segfault on Windows 8 (not 8.1) (#1775)
+ - [Win32] Bugfix: Duplicate size events were not filtered (#1610)
+ - [Win32] Bugfix: Full screen windows were incorrectly resized by DPI changes
+   (#1582)
+ - [Win32] Bugfix: `GLFW_SCALE_TO_MONITOR` had no effect on systems older than
+   Windows 10 version 1703 (#1511)
+ - [Win32] Bugfix: `USE_MSVC_RUNTIME_LIBRARY_DLL` had no effect on CMake 3.15 or
+   later (#1783,#1796)
+ - [Win32] Bugfix: Compilation with LLVM for Windows failed (#1807,#1824,#1874)
+ - [Win32] Bugfix: The foreground lock timeout was overridden, ignoring the user
+ - [Win32] Bugfix: Content scale queries could fail silently (#1615)
+ - [Win32] Bugfix: Content scales could have garbage values if monitor was recently
+   disconnected (#1615)
+ - [Cocoa] Added support for `VK_EXT_metal_surface` (#1619)
+ - [Cocoa] Added locating the Vulkan loader at runtime in an application bundle
+ - [Cocoa] Moved main menu creation to GLFW initialization time (#1649)
+ - [Cocoa] Changed `EGLNativeWindowType` from `NSView` to `CALayer` (#1169)
+ - [Cocoa] Changed F13 key to report Print Screen for cross-platform consistency
+   (#1786)
+ - [Cocoa] Removed dependency on the CoreVideo framework
+ - [Cocoa] Bugfix: `glfwSetWindowSize` used a bottom-left anchor point (#1553)
+ - [Cocoa] Bugfix: Window remained on screen after destruction until event poll
+   (#1412)
+ - [Cocoa] Bugfix: Event processing before window creation would assert (#1543)
+ - [Cocoa] Bugfix: Undecorated windows could not be iconified on recent macOS
+ - [Cocoa] Bugfix: Touching event queue from secondary thread before main thread
+   would abort (#1649)
+ - [Cocoa] Bugfix: Non-BMP Unicode codepoint input was reported as UTF-16
+   (#1635)
+ - [Cocoa] Bugfix: Failing to retrieve the refresh rate of built-in displays
+   could leak memory
+ - [Cocoa] Bugfix: Objective-C files were compiled as C with CMake 3.19 (#1787)
+ - [Cocoa] Bugfix: Duplicate video modes were not filtered out (#1830)
+ - [Cocoa] Bugfix: Menu bar was not clickable on macOS 10.15+ until it lost and
+   regained focus (#1648,#1802)
+ - [Cocoa] Bugfix: Monitor name query could segfault on macOS 11 (#1809,#1833)
+ - [Cocoa] Bugfix: The install name of the installed dylib was relative (#1504)
+ - [Cocoa] Bugfix: The MoltenVK layer contents scale was updated only after
+   related events were emitted
+ - [Cocoa] Bugfix: Moving the cursor programmatically would freeze it for
+   a fraction of a second (#1962)
+ - [Cocoa] Bugfix: `kIOMasterPortDefault` was deprecated in macOS 12.0 (#1980)
+ - [Cocoa] Bugfix: `kUTTypeURL` was deprecated in macOS 12.0 (#2003)
+ - [X11] Bugfix: The CMake files did not check for the XInput headers (#1480)
+ - [X11] Bugfix: Key names were not updated when the keyboard layout changed
+   (#1462,#1528)
+ - [X11] Bugfix: Decorations could not be enabled after window creation (#1566)
+ - [X11] Bugfix: Content scale fallback value could be inconsistent (#1578)
+ - [X11] Bugfix: `glfwMaximizeWindow` had no effect on hidden windows
+ - [X11] Bugfix: Clearing `GLFW_FLOATING` on a hidden window caused invalid read
+ - [X11] Bugfix: Changing `GLFW_FLOATING` on a hidden window could silently fail
+ - [X11] Bugfix: Disabled cursor mode was interrupted by indicator windows
+ - [X11] Bugfix: Monitor physical dimensions could be reported as zero mm
+ - [X11] Bugfix: Window position events were not emitted during resizing (#1613)
+ - [X11] Bugfix: `glfwFocusWindow` could terminate on older WMs or without a WM
+ - [X11] Bugfix: Querying a disconnected monitor could segfault (#1602)
+ - [X11] Bugfix: IME input of CJK was broken for "C" locale (#1587,#1636)
+ - [X11] Bugfix: Termination would segfault if the IM had been destroyed
+ - [X11] Bugfix: Any IM started after initialization would not be detected
+ - [X11] Bugfix: Xlib errors caused by other parts of the application could be
+   reported as GLFW errors
+ - [X11] Bugfix: A handle race condition could cause a `BadWindow` error (#1633)
+ - [X11] Bugfix: XKB path used keysyms instead of physical locations for
+   non-printable keys (#1598)
+ - [X11] Bugfix: Function keys were mapped to `GLFW_KEY_UNKNOWN` for some layout
+   combinations (#1598)
+ - [X11] Bugfix: Keys pressed simultaneously with others were not always
+   reported (#1112,#1415,#1472,#1616)
+ - [X11] Bugfix: Some window attributes were not applied on leaving fullscreen
+   (#1863)
+ - [X11] Bugfix: Changing `GLFW_FLOATING` could leak memory
+ - [X11] Bugfix: Icon pixel format conversion worked only by accident, relying on
+   undefined behavior (#1986)
+ - [X11] Bugfix: Dynamic loading on OpenBSD failed due to soname differences
+ - [Wayland] Added dynamic loading of all Wayland libraries
+ - [Wayland] Added support for key names via xkbcommon
+ - [Wayland] Removed support for `wl_shell` (#1443)
+ - [Wayland] Bugfix: The `GLFW_HAND_CURSOR` shape used the wrong image (#1432)
+ - [Wayland] Bugfix: `CLOCK_MONOTONIC` was not correctly enabled
+ - [Wayland] Bugfix: Repeated keys could be reported with `NULL` window (#1704)
+ - [Wayland] Bugfix: Retrieving partial framebuffer size would segfault
+ - [Wayland] Bugfix: Scrolling offsets were inverted compared to other platforms
+   (#1463)
+ - [Wayland] Bugfix: Client-Side Decorations were destroyed in the wrong order
+   (#1798)
+ - [Wayland] Bugfix: Monitors physical size could report zero (#1784,#1792)
+ - [Wayland] Bugfix: Some keys were not repeating in Wayland (#1908)
+ - [Wayland] Bugfix: Non-arrow cursors are offset from the hotspot (#1706,#1899)
+ - [Wayland] Bugfix: The `O_CLOEXEC` flag was not defined on FreeBSD
+ - [Wayland] Bugfix: Key repeat could lead to a race condition (#1710)
+ - [Wayland] Bugfix: Activating a window would emit two input focus events
+ - [Wayland] Bugfix: Disable key repeat mechanism when window loses input focus
+ - [Wayland] Bugfix: Window hiding and showing did not work (#1492,#1731)
+ - [Wayland] Bugfix: A key being repeated was not released when window lost focus
+ - [Wayland] Bugfix: Showing a hidden window did not emit a window refresh event
+ - [Wayland] Bugfix: Full screen window creation did not ignore `GLFW_VISIBLE`
+ - [Wayland] Bugfix: Some keys were reported as wrong key or `GLFW_KEY_UNKNOWN`
+ - [Wayland] Bugfix: Text input did not repeat along with key repeat
+ - [POSIX] Removed use of deprecated function `gettimeofday`
+ - [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
+ - [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)
+ - [NSGL] Removed enforcement of forward-compatible flag for core contexts
+ - [NSGL] Bugfix: `GLFW_COCOA_RETINA_FRAMEBUFFER` had no effect on newer
+   macOS versions (#1442)
+ - [NSGL] Bugfix: Workaround for swap interval on 10.14 broke on 10.12 (#1483)
+ - [NSGL] Bugfix: Defining `GL_SILENCE_DEPRECATION` externally caused
+   a duplicate definition warning (#1840)
+ - [EGL] Added platform selection via the `EGL_EXT_platform_base` extension
+   (#442)
+ - [EGL] Added ANGLE backend selection via `EGL_ANGLE_platform_angle` extension
+   (#1380)
+ - [EGL] Bugfix: The `GLFW_DOUBLEBUFFER` context attribute was ignored (#1843)
+
+
+## Contact
+
+On [glfw.org](https://www.glfw.org/) you can find the latest version of GLFW, as
+well as news, documentation and other information about the project.
+
+If you have questions related to the use of GLFW, we have a
+[forum](https://discourse.glfw.org/), and the `#glfw` IRC channel on
+[Libera.Chat](https://libera.chat/).
+
+If you have a bug to report, a patch to submit or a feature you'd like to
+request, please file it in the
+[issue tracker](https://github.com/glfw/glfw/issues) on GitHub.
+
+Finally, if you're interested in helping out with the development of GLFW or
+porting it to your favorite platform, join us on the forum, GitHub or IRC.
+

src/ThirdParty/glfw/deps/getopt.c

@@ -0,0 +1,230 @@
+/* Copyright (c) 2012, Kim Gräsman
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  * Neither the name of Kim Gräsman nor the names of contributors may be used
+ *    to endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL KIM GRÄSMAN BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "getopt.h"
+
+#include <stddef.h>
+#include <string.h>
+
+const int no_argument = 0;
+const int required_argument = 1;
+const int optional_argument = 2;
+
+char* optarg;
+int optopt;
+/* The variable optind [...] shall be initialized to 1 by the system. */
+int optind = 1;
+int opterr;
+
+static char* optcursor = NULL;
+
+/* Implemented based on [1] and [2] for optional arguments.
+   optopt is handled FreeBSD-style, per [3].
+   Other GNU and FreeBSD extensions are purely accidental.
+
+[1] http://pubs.opengroup.org/onlinepubs/000095399/functions/getopt.html
+[2] http://www.kernel.org/doc/man-pages/online/pages/man3/getopt.3.html
+[3] http://www.freebsd.org/cgi/man.cgi?query=getopt&sektion=3&manpath=FreeBSD+9.0-RELEASE
+*/
+int getopt(int argc, char* const argv[], const char* optstring) {
+  int optchar = -1;
+  const char* optdecl = NULL;
+
+  optarg = NULL;
+  opterr = 0;
+  optopt = 0;
+
+  /* Unspecified, but we need it to avoid overrunning the argv bounds. */
+  if (optind >= argc)
+    goto no_more_optchars;
+
+  /* If, when getopt() is called argv[optind] is a null pointer, getopt()
+     shall return -1 without changing optind. */
+  if (argv[optind] == NULL)
+    goto no_more_optchars;
+
+  /* If, when getopt() is called *argv[optind]  is not the character '-',
+     getopt() shall return -1 without changing optind. */
+  if (*argv[optind] != '-')
+    goto no_more_optchars;
+
+  /* If, when getopt() is called argv[optind] points to the string "-",
+     getopt() shall return -1 without changing optind. */
+  if (strcmp(argv[optind], "-") == 0)
+    goto no_more_optchars;
+
+  /* If, when getopt() is called argv[optind] points to the string "--",
+     getopt() shall return -1 after incrementing optind. */
+  if (strcmp(argv[optind], "--") == 0) {
+    ++optind;
+    goto no_more_optchars;
+  }
+
+  if (optcursor == NULL || *optcursor == '\0')
+    optcursor = argv[optind] + 1;
+
+  optchar = *optcursor;
+
+  /* FreeBSD: The variable optopt saves the last known option character
+     returned by getopt(). */
+  optopt = optchar;
+
+  /* The getopt() function shall return the next option character (if one is
+     found) from argv that matches a character in optstring, if there is
+     one that matches. */
+  optdecl = strchr(optstring, optchar);
+  if (optdecl) {
+    /* [I]f a character is followed by a colon, the option takes an
+       argument. */
+    if (optdecl[1] == ':') {
+      optarg = ++optcursor;
+      if (*optarg == '\0') {
+        /* GNU extension: Two colons mean an option takes an
+           optional arg; if there is text in the current argv-element
+           (i.e., in the same word as the option name itself, for example,
+           "-oarg"), then it is returned in optarg, otherwise optarg is set
+           to zero. */
+        if (optdecl[2] != ':') {
+          /* If the option was the last character in the string pointed to by
+             an element of argv, then optarg shall contain the next element
+             of argv, and optind shall be incremented by 2. If the resulting
+             value of optind is greater than argc, this indicates a missing
+             option-argument, and getopt() shall return an error indication.
+
+             Otherwise, optarg shall point to the string following the
+             option character in that element of argv, and optind shall be
+             incremented by 1.
+          */
+          if (++optind < argc) {
+            optarg = argv[optind];
+          } else {
+            /* If it detects a missing option-argument, it shall return the
+               colon character ( ':' ) if the first character of optstring
+               was a colon, or a question-mark character ( '?' ) otherwise.
+            */
+            optarg = NULL;
+            optchar = (optstring[0] == ':') ? ':' : '?';
+          }
+        } else {
+          optarg = NULL;
+        }
+      }
+
+      optcursor = NULL;
+    }
+  } else {
+    /* If getopt() encounters an option character that is not contained in
+       optstring, it shall return the question-mark ( '?' ) character. */
+    optchar = '?';
+  }
+
+  if (optcursor == NULL || *++optcursor == '\0')
+    ++optind;
+
+  return optchar;
+
+no_more_optchars:
+  optcursor = NULL;
+  return -1;
+}
+
+/* Implementation based on [1].
+
+[1] http://www.kernel.org/doc/man-pages/online/pages/man3/getopt.3.html
+*/
+int getopt_long(int argc, char* const argv[], const char* optstring,
+  const struct option* longopts, int* longindex) {
+  const struct option* o = longopts;
+  const struct option* match = NULL;
+  int num_matches = 0;
+  size_t argument_name_length = 0;
+  const char* current_argument = NULL;
+  int retval = -1;
+
+  optarg = NULL;
+  optopt = 0;
+
+  if (optind >= argc)
+    return -1;
+
+  if (strlen(argv[optind]) < 3 || strncmp(argv[optind], "--", 2) != 0)
+    return getopt(argc, argv, optstring);
+
+  /* It's an option; starts with -- and is longer than two chars. */
+  current_argument = argv[optind] + 2;
+  argument_name_length = strcspn(current_argument, "=");
+  for (; o->name; ++o) {
+    if (strncmp(o->name, current_argument, argument_name_length) == 0) {
+      match = o;
+      ++num_matches;
+    }
+  }
+
+  if (num_matches == 1) {
+    /* If longindex is not NULL, it points to a variable which is set to the
+       index of the long option relative to longopts. */
+    if (longindex)
+      *longindex = (int) (match - longopts);
+
+    /* If flag is NULL, then getopt_long() shall return val.
+       Otherwise, getopt_long() returns 0, and flag shall point to a variable
+       which shall be set to val if the option is found, but left unchanged if
+       the option is not found. */
+    if (match->flag)
+      *(match->flag) = match->val;
+
+    retval = match->flag ? 0 : match->val;
+
+    if (match->has_arg != no_argument) {
+      optarg = strchr(argv[optind], '=');
+      if (optarg != NULL)
+        ++optarg;
+
+      if (match->has_arg == required_argument) {
+        /* Only scan the next argv for required arguments. Behavior is not
+           specified, but has been observed with Ubuntu and Mac OSX. */
+        if (optarg == NULL && ++optind < argc) {
+          optarg = argv[optind];
+        }
+
+        if (optarg == NULL)
+          retval = ':';
+      }
+    } else if (strchr(argv[optind], '=')) {
+      /* An argument was provided to a non-argument option.
+         I haven't seen this specified explicitly, but both GNU and BSD-based
+         implementations show this behavior.
+      */
+      retval = '?';
+    }
+  } else {
+    /* Unknown option or ambiguous match. */
+    retval = '?';
+  }
+
+  ++optind;
+  return retval;
+}

src/ThirdParty/glfw/deps/getopt.h

@@ -0,0 +1,57 @@
+/* Copyright (c) 2012, Kim Gräsman
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  * Neither the name of Kim Gräsman nor the names of contributors may be used
+ *    to endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL KIM GRÄSMAN BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef INCLUDED_GETOPT_PORT_H
+#define INCLUDED_GETOPT_PORT_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+extern const int no_argument;
+extern const int required_argument;
+extern const int optional_argument;
+
+extern char* optarg;
+extern int optind, opterr, optopt;
+
+struct option {
+  const char* name;
+  int has_arg;
+  int* flag;
+  int val;
+};
+
+int getopt(int argc, char* const argv[], const char* optstring);
+
+int getopt_long(int argc, char* const argv[],
+  const char* optstring, const struct option* longopts, int* longindex);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif // INCLUDED_GETOPT_PORT_H

src/ThirdParty/glfw/deps/linmath.h

@@ -0,0 +1,606 @@
+#ifndef LINMATH_H
+#define LINMATH_H
+
+#include <string.h>
+#include <math.h>
+#include <string.h>
+
+/* 2021-03-21 Camilla Löwy <elmindreda@elmindreda.org>
+ * - Replaced double constants with float equivalents
+ */
+
+#ifdef LINMATH_NO_INLINE
+#define LINMATH_H_FUNC static
+#else
+#define LINMATH_H_FUNC static inline
+#endif
+
+#define LINMATH_H_DEFINE_VEC(n) \
+typedef float vec##n[n]; \
+LINMATH_H_FUNC void vec##n##_add(vec##n r, vec##n const a, vec##n const b) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = a[i] + b[i]; \
+} \
+LINMATH_H_FUNC void vec##n##_sub(vec##n r, vec##n const a, vec##n const b) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = a[i] - b[i]; \
+} \
+LINMATH_H_FUNC void vec##n##_scale(vec##n r, vec##n const v, float const s) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = v[i] * s; \
+} \
+LINMATH_H_FUNC float vec##n##_mul_inner(vec##n const a, vec##n const b) \
+{ \
+	float p = 0.f; \
+	int i; \
+	for(i=0; i<n; ++i) \
+		p += b[i]*a[i]; \
+	return p; \
+} \
+LINMATH_H_FUNC float vec##n##_len(vec##n const v) \
+{ \
+	return sqrtf(vec##n##_mul_inner(v,v)); \
+} \
+LINMATH_H_FUNC void vec##n##_norm(vec##n r, vec##n const v) \
+{ \
+	float k = 1.f / vec##n##_len(v); \
+	vec##n##_scale(r, v, k); \
+} \
+LINMATH_H_FUNC void vec##n##_min(vec##n r, vec##n const a, vec##n const b) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = a[i]<b[i] ? a[i] : b[i]; \
+} \
+LINMATH_H_FUNC void vec##n##_max(vec##n r, vec##n const a, vec##n const b) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = a[i]>b[i] ? a[i] : b[i]; \
+} \
+LINMATH_H_FUNC void vec##n##_dup(vec##n r, vec##n const src) \
+{ \
+	int i; \
+	for(i=0; i<n; ++i) \
+		r[i] = src[i]; \
+}
+
+LINMATH_H_DEFINE_VEC(2)
+LINMATH_H_DEFINE_VEC(3)
+LINMATH_H_DEFINE_VEC(4)
+
+LINMATH_H_FUNC void vec3_mul_cross(vec3 r, vec3 const a, vec3 const b)
+{
+	r[0] = a[1]*b[2] - a[2]*b[1];
+	r[1] = a[2]*b[0] - a[0]*b[2];
+	r[2] = a[0]*b[1] - a[1]*b[0];
+}
+
+LINMATH_H_FUNC void vec3_reflect(vec3 r, vec3 const v, vec3 const n)
+{
+	float p = 2.f * vec3_mul_inner(v, n);
+	int i;
+	for(i=0;i<3;++i)
+		r[i] = v[i] - p*n[i];
+}
+
+LINMATH_H_FUNC void vec4_mul_cross(vec4 r, vec4 const a, vec4 const b)
+{
+	r[0] = a[1]*b[2] - a[2]*b[1];
+	r[1] = a[2]*b[0] - a[0]*b[2];
+	r[2] = a[0]*b[1] - a[1]*b[0];
+	r[3] = 1.f;
+}
+
+LINMATH_H_FUNC void vec4_reflect(vec4 r, vec4 const v, vec4 const n)
+{
+	float p  = 2.f*vec4_mul_inner(v, n);
+	int i;
+	for(i=0;i<4;++i)
+		r[i] = v[i] - p*n[i];
+}
+
+typedef vec4 mat4x4[4];
+LINMATH_H_FUNC void mat4x4_identity(mat4x4 M)
+{
+	int i, j;
+	for(i=0; i<4; ++i)
+		for(j=0; j<4; ++j)
+			M[i][j] = i==j ? 1.f : 0.f;
+}
+LINMATH_H_FUNC void mat4x4_dup(mat4x4 M, mat4x4 const N)
+{
+	int i;
+	for(i=0; i<4; ++i)
+		vec4_dup(M[i], N[i]);
+}
+LINMATH_H_FUNC void mat4x4_row(vec4 r, mat4x4 const M, int i)
+{
+	int k;
+	for(k=0; k<4; ++k)
+		r[k] = M[k][i];
+}
+LINMATH_H_FUNC void mat4x4_col(vec4 r, mat4x4 const M, int i)
+{
+	int k;
+	for(k=0; k<4; ++k)
+		r[k] = M[i][k];
+}
+LINMATH_H_FUNC void mat4x4_transpose(mat4x4 M, mat4x4 const N)
+{
+    // Note: if M and N are the same, the user has to
+    // explicitly make a copy of M and set it to N.
+	int i, j;
+	for(j=0; j<4; ++j)
+		for(i=0; i<4; ++i)
+			M[i][j] = N[j][i];
+}
+LINMATH_H_FUNC void mat4x4_add(mat4x4 M, mat4x4 const a, mat4x4 const b)
+{
+	int i;
+	for(i=0; i<4; ++i)
+		vec4_add(M[i], a[i], b[i]);
+}
+LINMATH_H_FUNC void mat4x4_sub(mat4x4 M, mat4x4 const a, mat4x4 const b)
+{
+	int i;
+	for(i=0; i<4; ++i)
+		vec4_sub(M[i], a[i], b[i]);
+}
+LINMATH_H_FUNC void mat4x4_scale(mat4x4 M, mat4x4 const a, float k)
+{
+	int i;
+	for(i=0; i<4; ++i)
+		vec4_scale(M[i], a[i], k);
+}
+LINMATH_H_FUNC void mat4x4_scale_aniso(mat4x4 M, mat4x4 const a, float x, float y, float z)
+{
+	vec4_scale(M[0], a[0], x);
+	vec4_scale(M[1], a[1], y);
+	vec4_scale(M[2], a[2], z);
+	vec4_dup(M[3], a[3]);
+}
+LINMATH_H_FUNC void mat4x4_mul(mat4x4 M, mat4x4 const a, mat4x4 const b)
+{
+	mat4x4 temp;
+	int k, r, c;
+	for(c=0; c<4; ++c) for(r=0; r<4; ++r) {
+		temp[c][r] = 0.f;
+		for(k=0; k<4; ++k)
+			temp[c][r] += a[k][r] * b[c][k];
+	}
+	mat4x4_dup(M, temp);
+}
+LINMATH_H_FUNC void mat4x4_mul_vec4(vec4 r, mat4x4 const M, vec4 const v)
+{
+	int i, j;
+	for(j=0; j<4; ++j) {
+		r[j] = 0.f;
+		for(i=0; i<4; ++i)
+			r[j] += M[i][j] * v[i];
+	}
+}
+LINMATH_H_FUNC void mat4x4_translate(mat4x4 T, float x, float y, float z)
+{
+	mat4x4_identity(T);
+	T[3][0] = x;
+	T[3][1] = y;
+	T[3][2] = z;
+}
+LINMATH_H_FUNC void mat4x4_translate_in_place(mat4x4 M, float x, float y, float z)
+{
+	vec4 t = {x, y, z, 0};
+	vec4 r;
+	int i;
+	for (i = 0; i < 4; ++i) {
+		mat4x4_row(r, M, i);
+		M[3][i] += vec4_mul_inner(r, t);
+	}
+}
+LINMATH_H_FUNC void mat4x4_from_vec3_mul_outer(mat4x4 M, vec3 const a, vec3 const b)
+{
+	int i, j;
+	for(i=0; i<4; ++i) for(j=0; j<4; ++j)
+		M[i][j] = i<3 && j<3 ? a[i] * b[j] : 0.f;
+}
+LINMATH_H_FUNC void mat4x4_rotate(mat4x4 R, mat4x4 const M, float x, float y, float z, float angle)
+{
+	float s = sinf(angle);
+	float c = cosf(angle);
+	vec3 u = {x, y, z};
+
+	if(vec3_len(u) > 1e-4) {
+		vec3_norm(u, u);
+		mat4x4 T;
+		mat4x4_from_vec3_mul_outer(T, u, u);
+
+		mat4x4 S = {
+			{    0,  u[2], -u[1], 0},
+			{-u[2],     0,  u[0], 0},
+			{ u[1], -u[0],     0, 0},
+			{    0,     0,     0, 0}
+		};
+		mat4x4_scale(S, S, s);
+
+		mat4x4 C;
+		mat4x4_identity(C);
+		mat4x4_sub(C, C, T);
+
+		mat4x4_scale(C, C, c);
+
+		mat4x4_add(T, T, C);
+		mat4x4_add(T, T, S);
+
+		T[3][3] = 1.f;
+		mat4x4_mul(R, M, T);
+	} else {
+		mat4x4_dup(R, M);
+	}
+}
+LINMATH_H_FUNC void mat4x4_rotate_X(mat4x4 Q, mat4x4 const M, float angle)
+{
+	float s = sinf(angle);
+	float c = cosf(angle);
+	mat4x4 R = {
+		{1.f, 0.f, 0.f, 0.f},
+		{0.f,   c,   s, 0.f},
+		{0.f,  -s,   c, 0.f},
+		{0.f, 0.f, 0.f, 1.f}
+	};
+	mat4x4_mul(Q, M, R);
+}
+LINMATH_H_FUNC void mat4x4_rotate_Y(mat4x4 Q, mat4x4 const M, float angle)
+{
+	float s = sinf(angle);
+	float c = cosf(angle);
+	mat4x4 R = {
+		{   c, 0.f,  -s, 0.f},
+		{ 0.f, 1.f, 0.f, 0.f},
+		{   s, 0.f,   c, 0.f},
+		{ 0.f, 0.f, 0.f, 1.f}
+	};
+	mat4x4_mul(Q, M, R);
+}
+LINMATH_H_FUNC void mat4x4_rotate_Z(mat4x4 Q, mat4x4 const M, float angle)
+{
+	float s = sinf(angle);
+	float c = cosf(angle);
+	mat4x4 R = {
+		{   c,   s, 0.f, 0.f},
+		{  -s,   c, 0.f, 0.f},
+		{ 0.f, 0.f, 1.f, 0.f},
+		{ 0.f, 0.f, 0.f, 1.f}
+	};
+	mat4x4_mul(Q, M, R);
+}
+LINMATH_H_FUNC void mat4x4_invert(mat4x4 T, mat4x4 const M)
+{
+	float s[6];
+	float c[6];
+	s[0] = M[0][0]*M[1][1] - M[1][0]*M[0][1];
+	s[1] = M[0][0]*M[1][2] - M[1][0]*M[0][2];
+	s[2] = M[0][0]*M[1][3] - M[1][0]*M[0][3];
+	s[3] = M[0][1]*M[1][2] - M[1][1]*M[0][2];
+	s[4] = M[0][1]*M[1][3] - M[1][1]*M[0][3];
+	s[5] = M[0][2]*M[1][3] - M[1][2]*M[0][3];
+
+	c[0] = M[2][0]*M[3][1] - M[3][0]*M[2][1];
+	c[1] = M[2][0]*M[3][2] - M[3][0]*M[2][2];
+	c[2] = M[2][0]*M[3][3] - M[3][0]*M[2][3];
+	c[3] = M[2][1]*M[3][2] - M[3][1]*M[2][2];
+	c[4] = M[2][1]*M[3][3] - M[3][1]*M[2][3];
+	c[5] = M[2][2]*M[3][3] - M[3][2]*M[2][3];
+	
+	/* Assumes it is invertible */
+	float idet = 1.0f/( s[0]*c[5]-s[1]*c[4]+s[2]*c[3]+s[3]*c[2]-s[4]*c[1]+s[5]*c[0] );
+	
+	T[0][0] = ( M[1][1] * c[5] - M[1][2] * c[4] + M[1][3] * c[3]) * idet;
+	T[0][1] = (-M[0][1] * c[5] + M[0][2] * c[4] - M[0][3] * c[3]) * idet;
+	T[0][2] = ( M[3][1] * s[5] - M[3][2] * s[4] + M[3][3] * s[3]) * idet;
+	T[0][3] = (-M[2][1] * s[5] + M[2][2] * s[4] - M[2][3] * s[3]) * idet;
+
+	T[1][0] = (-M[1][0] * c[5] + M[1][2] * c[2] - M[1][3] * c[1]) * idet;
+	T[1][1] = ( M[0][0] * c[5] - M[0][2] * c[2] + M[0][3] * c[1]) * idet;
+	T[1][2] = (-M[3][0] * s[5] + M[3][2] * s[2] - M[3][3] * s[1]) * idet;
+	T[1][3] = ( M[2][0] * s[5] - M[2][2] * s[2] + M[2][3] * s[1]) * idet;
+
+	T[2][0] = ( M[1][0] * c[4] - M[1][1] * c[2] + M[1][3] * c[0]) * idet;
+	T[2][1] = (-M[0][0] * c[4] + M[0][1] * c[2] - M[0][3] * c[0]) * idet;
+	T[2][2] = ( M[3][0] * s[4] - M[3][1] * s[2] + M[3][3] * s[0]) * idet;
+	T[2][3] = (-M[2][0] * s[4] + M[2][1] * s[2] - M[2][3] * s[0]) * idet;
+
+	T[3][0] = (-M[1][0] * c[3] + M[1][1] * c[1] - M[1][2] * c[0]) * idet;
+	T[3][1] = ( M[0][0] * c[3] - M[0][1] * c[1] + M[0][2] * c[0]) * idet;
+	T[3][2] = (-M[3][0] * s[3] + M[3][1] * s[1] - M[3][2] * s[0]) * idet;
+	T[3][3] = ( M[2][0] * s[3] - M[2][1] * s[1] + M[2][2] * s[0]) * idet;
+}
+LINMATH_H_FUNC void mat4x4_orthonormalize(mat4x4 R, mat4x4 const M)
+{
+	mat4x4_dup(R, M);
+	float s = 1.f;
+	vec3 h;
+
+	vec3_norm(R[2], R[2]);
+	
+	s = vec3_mul_inner(R[1], R[2]);
+	vec3_scale(h, R[2], s);
+	vec3_sub(R[1], R[1], h);
+	vec3_norm(R[1], R[1]);
+
+	s = vec3_mul_inner(R[0], R[2]);
+	vec3_scale(h, R[2], s);
+	vec3_sub(R[0], R[0], h);
+
+	s = vec3_mul_inner(R[0], R[1]);
+	vec3_scale(h, R[1], s);
+	vec3_sub(R[0], R[0], h);
+	vec3_norm(R[0], R[0]);
+}
+
+LINMATH_H_FUNC void mat4x4_frustum(mat4x4 M, float l, float r, float b, float t, float n, float f)
+{
+	M[0][0] = 2.f*n/(r-l);
+	M[0][1] = M[0][2] = M[0][3] = 0.f;
+	
+	M[1][1] = 2.f*n/(t-b);
+	M[1][0] = M[1][2] = M[1][3] = 0.f;
+
+	M[2][0] = (r+l)/(r-l);
+	M[2][1] = (t+b)/(t-b);
+	M[2][2] = -(f+n)/(f-n);
+	M[2][3] = -1.f;
+	
+	M[3][2] = -2.f*(f*n)/(f-n);
+	M[3][0] = M[3][1] = M[3][3] = 0.f;
+}
+LINMATH_H_FUNC void mat4x4_ortho(mat4x4 M, float l, float r, float b, float t, float n, float f)
+{
+	M[0][0] = 2.f/(r-l);
+	M[0][1] = M[0][2] = M[0][3] = 0.f;
+
+	M[1][1] = 2.f/(t-b);
+	M[1][0] = M[1][2] = M[1][3] = 0.f;
+
+	M[2][2] = -2.f/(f-n);
+	M[2][0] = M[2][1] = M[2][3] = 0.f;
+	
+	M[3][0] = -(r+l)/(r-l);
+	M[3][1] = -(t+b)/(t-b);
+	M[3][2] = -(f+n)/(f-n);
+	M[3][3] = 1.f;
+}
+LINMATH_H_FUNC void mat4x4_perspective(mat4x4 m, float y_fov, float aspect, float n, float f)
+{
+	/* NOTE: Degrees are an unhandy unit to work with.
+	 * linmath.h uses radians for everything! */
+	float const a = 1.f / tanf(y_fov / 2.f);
+
+	m[0][0] = a / aspect;
+	m[0][1] = 0.f;
+	m[0][2] = 0.f;
+	m[0][3] = 0.f;
+
+	m[1][0] = 0.f;
+	m[1][1] = a;
+	m[1][2] = 0.f;
+	m[1][3] = 0.f;
+
+	m[2][0] = 0.f;
+	m[2][1] = 0.f;
+	m[2][2] = -((f + n) / (f - n));
+	m[2][3] = -1.f;
+
+	m[3][0] = 0.f;
+	m[3][1] = 0.f;
+	m[3][2] = -((2.f * f * n) / (f - n));
+	m[3][3] = 0.f;
+}
+LINMATH_H_FUNC void mat4x4_look_at(mat4x4 m, vec3 const eye, vec3 const center, vec3 const up)
+{
+	/* Adapted from Android's OpenGL Matrix.java.                        */
+	/* See the OpenGL GLUT documentation for gluLookAt for a description */
+	/* of the algorithm. We implement it in a straightforward way:       */
+
+	/* TODO: The negation of of can be spared by swapping the order of
+	 *       operands in the following cross products in the right way. */
+	vec3 f;
+	vec3_sub(f, center, eye);	
+	vec3_norm(f, f);	
+	
+	vec3 s;
+	vec3_mul_cross(s, f, up);
+	vec3_norm(s, s);
+
+	vec3 t;
+	vec3_mul_cross(t, s, f);
+
+	m[0][0] =  s[0];
+	m[0][1] =  t[0];
+	m[0][2] = -f[0];
+	m[0][3] =   0.f;
+
+	m[1][0] =  s[1];
+	m[1][1] =  t[1];
+	m[1][2] = -f[1];
+	m[1][3] =   0.f;
+
+	m[2][0] =  s[2];
+	m[2][1] =  t[2];
+	m[2][2] = -f[2];
+	m[2][3] =   0.f;
+
+	m[3][0] =  0.f;
+	m[3][1] =  0.f;
+	m[3][2] =  0.f;
+	m[3][3] =  1.f;
+
+	mat4x4_translate_in_place(m, -eye[0], -eye[1], -eye[2]);
+}
+
+typedef float quat[4];
+#define quat_add vec4_add
+#define quat_sub vec4_sub
+#define quat_norm vec4_norm
+#define quat_scale vec4_scale
+#define quat_mul_inner vec4_mul_inner
+
+LINMATH_H_FUNC void quat_identity(quat q)
+{
+	q[0] = q[1] = q[2] = 0.f;
+	q[3] = 1.f;
+}
+LINMATH_H_FUNC void quat_mul(quat r, quat const p, quat const q)
+{
+	vec3 w;
+	vec3_mul_cross(r, p, q);
+	vec3_scale(w, p, q[3]);
+	vec3_add(r, r, w);
+	vec3_scale(w, q, p[3]);
+	vec3_add(r, r, w);
+	r[3] = p[3]*q[3] - vec3_mul_inner(p, q);
+}
+LINMATH_H_FUNC void quat_conj(quat r, quat const q)
+{
+	int i;
+	for(i=0; i<3; ++i)
+		r[i] = -q[i];
+	r[3] = q[3];
+}
+LINMATH_H_FUNC void quat_rotate(quat r, float angle, vec3 const axis) {
+    vec3 axis_norm;
+    vec3_norm(axis_norm, axis);
+    float s = sinf(angle / 2);
+    float c = cosf(angle / 2);
+    vec3_scale(r, axis_norm, s);
+    r[3] = c;
+}
+LINMATH_H_FUNC void quat_mul_vec3(vec3 r, quat const q, vec3 const v)
+{
+/*
+ * Method by Fabian 'ryg' Giessen (of Farbrausch)
+t = 2 * cross(q.xyz, v)
+v' = v + q.w * t + cross(q.xyz, t)
+ */
+	vec3 t;
+	vec3 q_xyz = {q[0], q[1], q[2]};
+	vec3 u = {q[0], q[1], q[2]};
+
+	vec3_mul_cross(t, q_xyz, v);
+	vec3_scale(t, t, 2);
+
+	vec3_mul_cross(u, q_xyz, t);
+	vec3_scale(t, t, q[3]);
+
+	vec3_add(r, v, t);
+	vec3_add(r, r, u);
+}
+LINMATH_H_FUNC void mat4x4_from_quat(mat4x4 M, quat const q)
+{
+	float a = q[3];
+	float b = q[0];
+	float c = q[1];
+	float d = q[2];
+	float a2 = a*a;
+	float b2 = b*b;
+	float c2 = c*c;
+	float d2 = d*d;
+	
+	M[0][0] = a2 + b2 - c2 - d2;
+	M[0][1] = 2.f*(b*c + a*d);
+	M[0][2] = 2.f*(b*d - a*c);
+	M[0][3] = 0.f;
+
+	M[1][0] = 2*(b*c - a*d);
+	M[1][1] = a2 - b2 + c2 - d2;
+	M[1][2] = 2.f*(c*d + a*b);
+	M[1][3] = 0.f;
+
+	M[2][0] = 2.f*(b*d + a*c);
+	M[2][1] = 2.f*(c*d - a*b);
+	M[2][2] = a2 - b2 - c2 + d2;
+	M[2][3] = 0.f;
+
+	M[3][0] = M[3][1] = M[3][2] = 0.f;
+	M[3][3] = 1.f;
+}
+
+LINMATH_H_FUNC void mat4x4o_mul_quat(mat4x4 R, mat4x4 const M, quat const q)
+{
+/*  XXX: The way this is written only works for orthogonal matrices. */
+/* TODO: Take care of non-orthogonal case. */
+	quat_mul_vec3(R[0], q, M[0]);
+	quat_mul_vec3(R[1], q, M[1]);
+	quat_mul_vec3(R[2], q, M[2]);
+
+	R[3][0] = R[3][1] = R[3][2] = 0.f;
+	R[0][3] = M[0][3];
+	R[1][3] = M[1][3];
+	R[2][3] = M[2][3];
+	R[3][3] = M[3][3];  // typically 1.0, but here we make it general
+}
+LINMATH_H_FUNC void quat_from_mat4x4(quat q, mat4x4 const M)
+{
+	float r=0.f;
+	int i;
+
+	int perm[] = { 0, 1, 2, 0, 1 };
+	int *p = perm;
+
+	for(i = 0; i<3; i++) {
+		float m = M[i][i];
+		if( m < r )
+			continue;
+		m = r;
+		p = &perm[i];
+	}
+
+	r = sqrtf(1.f + M[p[0]][p[0]] - M[p[1]][p[1]] - M[p[2]][p[2]] );
+
+	if(r < 1e-6) {
+		q[0] = 1.f;
+		q[1] = q[2] = q[3] = 0.f;
+		return;
+	}
+
+	q[0] = r/2.f;
+	q[1] = (M[p[0]][p[1]] - M[p[1]][p[0]])/(2.f*r);
+	q[2] = (M[p[2]][p[0]] - M[p[0]][p[2]])/(2.f*r);
+	q[3] = (M[p[2]][p[1]] - M[p[1]][p[2]])/(2.f*r);
+}
+
+LINMATH_H_FUNC void mat4x4_arcball(mat4x4 R, mat4x4 const M, vec2 const _a, vec2 const _b, float s)
+{
+	vec2 a; memcpy(a, _a, sizeof(a));
+	vec2 b; memcpy(b, _b, sizeof(b));
+	
+	float z_a = 0.f;
+	float z_b = 0.f;
+
+	if(vec2_len(a) < 1.f) {
+		z_a = sqrtf(1.f - vec2_mul_inner(a, a));
+	} else {
+		vec2_norm(a, a);
+	}
+
+	if(vec2_len(b) < 1.f) {
+		z_b = sqrtf(1.f - vec2_mul_inner(b, b));
+	} else {
+		vec2_norm(b, b);
+	}
+	
+	vec3 a_ = {a[0], a[1], z_a};
+	vec3 b_ = {b[0], b[1], z_b};
+
+	vec3 c_;
+	vec3_mul_cross(c_, a_, b_);
+
+	float const angle = acos(vec3_mul_inner(a_, b_)) * s;
+	mat4x4_rotate(R, M, c_[0], c_[1], c_[2], angle);
+}
+#endif

src/ThirdParty/glfw/deps/mingw/_mingw_dxhelper.h

@@ -0,0 +1,117 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER within this package.
+ */
+
+#if defined(_MSC_VER) && !defined(_MSC_EXTENSIONS)
+#define NONAMELESSUNION		1
+#endif
+#if defined(NONAMELESSSTRUCT) && \
+   !defined(NONAMELESSUNION)
+#define NONAMELESSUNION		1
+#endif
+#if defined(NONAMELESSUNION)  && \
+   !defined(NONAMELESSSTRUCT)
+#define NONAMELESSSTRUCT	1
+#endif
+#if !defined(__GNU_EXTENSION)
+#if defined(__GNUC__) || defined(__GNUG__)
+#define __GNU_EXTENSION		__extension__
+#else
+#define __GNU_EXTENSION
+#endif
+#endif /* __extension__ */
+
+#ifndef __ANONYMOUS_DEFINED
+#define __ANONYMOUS_DEFINED
+#if defined(__GNUC__) || defined(__GNUG__)
+#define _ANONYMOUS_UNION	__extension__
+#define _ANONYMOUS_STRUCT	__extension__
+#else
+#define _ANONYMOUS_UNION
+#define _ANONYMOUS_STRUCT
+#endif
+#ifndef NONAMELESSUNION
+#define _UNION_NAME(x)
+#define _STRUCT_NAME(x)
+#else /* NONAMELESSUNION */
+#define _UNION_NAME(x)  x
+#define _STRUCT_NAME(x) x
+#endif
+#endif	/* __ANONYMOUS_DEFINED */
+
+#ifndef DUMMYUNIONNAME
+# ifdef NONAMELESSUNION
+#  define DUMMYUNIONNAME  u
+#  define DUMMYUNIONNAME1 u1	/* Wine uses this variant */
+#  define DUMMYUNIONNAME2 u2
+#  define DUMMYUNIONNAME3 u3
+#  define DUMMYUNIONNAME4 u4
+#  define DUMMYUNIONNAME5 u5
+#  define DUMMYUNIONNAME6 u6
+#  define DUMMYUNIONNAME7 u7
+#  define DUMMYUNIONNAME8 u8
+#  define DUMMYUNIONNAME9 u9
+# else /* NONAMELESSUNION */
+#  define DUMMYUNIONNAME
+#  define DUMMYUNIONNAME1	/* Wine uses this variant */
+#  define DUMMYUNIONNAME2
+#  define DUMMYUNIONNAME3
+#  define DUMMYUNIONNAME4
+#  define DUMMYUNIONNAME5
+#  define DUMMYUNIONNAME6
+#  define DUMMYUNIONNAME7
+#  define DUMMYUNIONNAME8
+#  define DUMMYUNIONNAME9
+# endif
+#endif	/* DUMMYUNIONNAME */
+
+#if !defined(DUMMYUNIONNAME1)	/* MinGW does not define this one */
+# ifdef NONAMELESSUNION
+#  define DUMMYUNIONNAME1 u1	/* Wine uses this variant */
+# else
+#  define DUMMYUNIONNAME1	/* Wine uses this variant */
+# endif
+#endif	/* DUMMYUNIONNAME1 */
+
+#ifndef DUMMYSTRUCTNAME
+# ifdef NONAMELESSUNION
+#  define DUMMYSTRUCTNAME  s
+#  define DUMMYSTRUCTNAME1 s1	/* Wine uses this variant */
+#  define DUMMYSTRUCTNAME2 s2
+#  define DUMMYSTRUCTNAME3 s3
+#  define DUMMYSTRUCTNAME4 s4
+#  define DUMMYSTRUCTNAME5 s5
+# else
+#  define DUMMYSTRUCTNAME
+#  define DUMMYSTRUCTNAME1	/* Wine uses this variant */
+#  define DUMMYSTRUCTNAME2
+#  define DUMMYSTRUCTNAME3
+#  define DUMMYSTRUCTNAME4
+#  define DUMMYSTRUCTNAME5
+# endif
+#endif /* DUMMYSTRUCTNAME */
+
+/* These are for compatibility with the Wine source tree */
+
+#ifndef WINELIB_NAME_AW
+# ifdef __MINGW_NAME_AW
+#   define WINELIB_NAME_AW  __MINGW_NAME_AW
+# else
+#  ifdef UNICODE
+#   define WINELIB_NAME_AW(func) func##W
+#  else
+#   define WINELIB_NAME_AW(func) func##A
+#  endif
+# endif
+#endif	/* WINELIB_NAME_AW */
+
+#ifndef DECL_WINELIB_TYPE_AW
+# ifdef __MINGW_TYPEDEF_AW
+#  define DECL_WINELIB_TYPE_AW  __MINGW_TYPEDEF_AW
+# else
+#  define DECL_WINELIB_TYPE_AW(type)  typedef WINELIB_NAME_AW(type) type;
+# endif
+#endif	/* DECL_WINELIB_TYPE_AW */
+

src/ThirdParty/glfw/deps/mingw/xinput.h

@@ -0,0 +1,239 @@
+/*
+ * The Wine project - Xinput Joystick Library
+ * Copyright 2008 Andrew Fenn
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef __WINE_XINPUT_H
+#define __WINE_XINPUT_H
+
+#include <windef.h>
+
+/*
+ * Bitmasks for the joysticks buttons, determines what has
+ * been pressed on the joystick, these need to be mapped
+ * to whatever device you're using instead of an xbox 360
+ * joystick
+ */
+
+#define XINPUT_GAMEPAD_DPAD_UP          0x0001
+#define XINPUT_GAMEPAD_DPAD_DOWN        0x0002
+#define XINPUT_GAMEPAD_DPAD_LEFT        0x0004
+#define XINPUT_GAMEPAD_DPAD_RIGHT       0x0008
+#define XINPUT_GAMEPAD_START            0x0010
+#define XINPUT_GAMEPAD_BACK             0x0020
+#define XINPUT_GAMEPAD_LEFT_THUMB       0x0040
+#define XINPUT_GAMEPAD_RIGHT_THUMB      0x0080
+#define XINPUT_GAMEPAD_LEFT_SHOULDER    0x0100
+#define XINPUT_GAMEPAD_RIGHT_SHOULDER   0x0200
+#define XINPUT_GAMEPAD_A                0x1000
+#define XINPUT_GAMEPAD_B                0x2000
+#define XINPUT_GAMEPAD_X                0x4000
+#define XINPUT_GAMEPAD_Y                0x8000
+
+/*
+ * Defines the flags used to determine if the user is pushing
+ * down on a button, not holding a button, etc
+ */
+
+#define XINPUT_KEYSTROKE_KEYDOWN        0x0001
+#define XINPUT_KEYSTROKE_KEYUP          0x0002
+#define XINPUT_KEYSTROKE_REPEAT         0x0004
+
+/*
+ * Defines the codes which are returned by XInputGetKeystroke
+ */
+
+#define VK_PAD_A                        0x5800
+#define VK_PAD_B                        0x5801
+#define VK_PAD_X                        0x5802
+#define VK_PAD_Y                        0x5803
+#define VK_PAD_RSHOULDER                0x5804
+#define VK_PAD_LSHOULDER                0x5805
+#define VK_PAD_LTRIGGER                 0x5806
+#define VK_PAD_RTRIGGER                 0x5807
+#define VK_PAD_DPAD_UP                  0x5810
+#define VK_PAD_DPAD_DOWN                0x5811
+#define VK_PAD_DPAD_LEFT                0x5812
+#define VK_PAD_DPAD_RIGHT               0x5813
+#define VK_PAD_START                    0x5814
+#define VK_PAD_BACK                     0x5815
+#define VK_PAD_LTHUMB_PRESS             0x5816
+#define VK_PAD_RTHUMB_PRESS             0x5817
+#define VK_PAD_LTHUMB_UP                0x5820
+#define VK_PAD_LTHUMB_DOWN              0x5821
+#define VK_PAD_LTHUMB_RIGHT             0x5822
+#define VK_PAD_LTHUMB_LEFT              0x5823
+#define VK_PAD_LTHUMB_UPLEFT            0x5824
+#define VK_PAD_LTHUMB_UPRIGHT           0x5825
+#define VK_PAD_LTHUMB_DOWNRIGHT         0x5826
+#define VK_PAD_LTHUMB_DOWNLEFT          0x5827
+#define VK_PAD_RTHUMB_UP                0x5830
+#define VK_PAD_RTHUMB_DOWN              0x5831
+#define VK_PAD_RTHUMB_RIGHT             0x5832
+#define VK_PAD_RTHUMB_LEFT              0x5833
+#define VK_PAD_RTHUMB_UPLEFT            0x5834
+#define VK_PAD_RTHUMB_UPRIGHT           0x5835
+#define VK_PAD_RTHUMB_DOWNRIGHT         0x5836
+#define VK_PAD_RTHUMB_DOWNLEFT          0x5837
+
+/*
+ * Deadzones are for analogue joystick controls on the joypad
+ * which determine when input should be assumed to be in the
+ * middle of the pad. This is a threshold to stop a joypad
+ * controlling the game when the player isn't touching the
+ * controls.
+ */
+
+#define XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE  7849
+#define XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE 8689
+#define XINPUT_GAMEPAD_TRIGGER_THRESHOLD    30
+
+
+/*
+ * Defines what type of abilities the type of joystick has
+ * DEVTYPE_GAMEPAD is available for all joysticks, however
+ * there may be more specific identifiers for other joysticks
+ * which are being used.
+ */
+
+#define XINPUT_DEVTYPE_GAMEPAD          0x01
+#define XINPUT_DEVSUBTYPE_GAMEPAD       0x01
+#define XINPUT_DEVSUBTYPE_WHEEL         0x02
+#define XINPUT_DEVSUBTYPE_ARCADE_STICK  0x03
+#define XINPUT_DEVSUBTYPE_FLIGHT_SICK   0x04
+#define XINPUT_DEVSUBTYPE_DANCE_PAD     0x05
+#define XINPUT_DEVSUBTYPE_GUITAR        0x06
+#define XINPUT_DEVSUBTYPE_DRUM_KIT      0x08
+
+/*
+ * These are used with the XInputGetCapabilities function to
+ * determine the abilities to the joystick which has been
+ * plugged in.
+ */
+
+#define XINPUT_CAPS_VOICE_SUPPORTED     0x0004
+#define XINPUT_FLAG_GAMEPAD             0x00000001
+
+/*
+ * Defines the status of the battery if one is used in the
+ * attached joystick. The first two define if the joystick
+ * supports a battery. Disconnected means that the joystick
+ * isn't connected. Wired shows that the joystick is a wired
+ * joystick.
+ */
+
+#define BATTERY_DEVTYPE_GAMEPAD         0x00
+#define BATTERY_DEVTYPE_HEADSET         0x01
+#define BATTERY_TYPE_DISCONNECTED       0x00
+#define BATTERY_TYPE_WIRED              0x01
+#define BATTERY_TYPE_ALKALINE           0x02
+#define BATTERY_TYPE_NIMH               0x03
+#define BATTERY_TYPE_UNKNOWN            0xFF
+#define BATTERY_LEVEL_EMPTY             0x00
+#define BATTERY_LEVEL_LOW               0x01
+#define BATTERY_LEVEL_MEDIUM            0x02
+#define BATTERY_LEVEL_FULL              0x03
+
+/*
+ * How many joysticks can be used with this library. Games that
+ * use the xinput library will not go over this number.
+ */
+
+#define XUSER_MAX_COUNT                 4
+#define XUSER_INDEX_ANY                 0x000000FF
+
+/*
+ * Defines the structure of an xbox 360 joystick.
+ */
+
+typedef struct _XINPUT_GAMEPAD {
+    WORD wButtons;
+    BYTE bLeftTrigger;
+    BYTE bRightTrigger;
+    SHORT sThumbLX;
+    SHORT sThumbLY;
+    SHORT sThumbRX;
+    SHORT sThumbRY;
+} XINPUT_GAMEPAD, *PXINPUT_GAMEPAD;
+
+typedef struct _XINPUT_STATE {
+    DWORD dwPacketNumber;
+    XINPUT_GAMEPAD Gamepad;
+} XINPUT_STATE, *PXINPUT_STATE;
+
+/*
+ * Defines the structure of how much vibration is set on both the
+ * right and left motors in a joystick. If you're not using a 360
+ * joystick you will have to map these to your device.
+ */
+
+typedef struct _XINPUT_VIBRATION {
+    WORD wLeftMotorSpeed;
+    WORD wRightMotorSpeed;
+} XINPUT_VIBRATION, *PXINPUT_VIBRATION;
+
+/*
+ * Defines the structure for what kind of abilities the joystick has
+ * such abilities are things such as if the joystick has the ability
+ * to send and receive audio, if the joystick is in fact a driving
+ * wheel or perhaps if the joystick is some kind of dance pad or
+ * guitar.
+ */
+
+typedef struct _XINPUT_CAPABILITIES {
+    BYTE Type;
+    BYTE SubType;
+    WORD Flags;
+    XINPUT_GAMEPAD Gamepad;
+    XINPUT_VIBRATION Vibration;
+} XINPUT_CAPABILITIES, *PXINPUT_CAPABILITIES;
+
+/*
+ * Defines the structure for a joystick input event which is
+ * retrieved using the function XInputGetKeystroke
+ */
+typedef struct _XINPUT_KEYSTROKE {
+    WORD VirtualKey;
+    WCHAR Unicode;
+    WORD Flags;
+    BYTE UserIndex;
+    BYTE HidCode;
+} XINPUT_KEYSTROKE, *PXINPUT_KEYSTROKE;
+
+typedef struct _XINPUT_BATTERY_INFORMATION
+{
+    BYTE BatteryType;
+    BYTE BatteryLevel;
+} XINPUT_BATTERY_INFORMATION, *PXINPUT_BATTERY_INFORMATION;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void WINAPI XInputEnable(WINBOOL);
+DWORD WINAPI XInputSetState(DWORD, XINPUT_VIBRATION*);
+DWORD WINAPI XInputGetState(DWORD, XINPUT_STATE*);
+DWORD WINAPI XInputGetKeystroke(DWORD, DWORD, PXINPUT_KEYSTROKE);
+DWORD WINAPI XInputGetCapabilities(DWORD, DWORD, XINPUT_CAPABILITIES*);
+DWORD WINAPI XInputGetDSoundAudioDeviceGuids(DWORD, GUID*, GUID*);
+DWORD WINAPI XInputGetBatteryInformation(DWORD, BYTE, XINPUT_BATTERY_INFORMATION*);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __WINE_XINPUT_H */

src/ThirdParty/glfw/deps/nuklear_glfw_gl2.h

@@ -0,0 +1,381 @@
+/*
+ * Nuklear - v1.32.0 - public domain
+ * no warrenty implied; use at your own risk.
+ * authored from 2015-2017 by Micha Mettke
+ */
+/*
+ * ==============================================================
+ *
+ *                              API
+ *
+ * ===============================================================
+ */
+#ifndef NK_GLFW_GL2_H_
+#define NK_GLFW_GL2_H_
+
+#include <GLFW/glfw3.h>
+
+enum nk_glfw_init_state{
+    NK_GLFW3_DEFAULT = 0,
+    NK_GLFW3_INSTALL_CALLBACKS
+};
+NK_API struct nk_context*   nk_glfw3_init(GLFWwindow *win, enum nk_glfw_init_state);
+NK_API void                 nk_glfw3_font_stash_begin(struct nk_font_atlas **atlas);
+NK_API void                 nk_glfw3_font_stash_end(void);
+
+NK_API void                 nk_glfw3_new_frame(void);
+NK_API void                 nk_glfw3_render(enum nk_anti_aliasing);
+NK_API void                 nk_glfw3_shutdown(void);
+
+NK_API void                 nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint);
+NK_API void                 nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff);
+
+#endif
+
+/*
+ * ==============================================================
+ *
+ *                          IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+#ifdef NK_GLFW_GL2_IMPLEMENTATION
+
+#ifndef NK_GLFW_TEXT_MAX
+#define NK_GLFW_TEXT_MAX 256
+#endif
+#ifndef NK_GLFW_DOUBLE_CLICK_LO
+#define NK_GLFW_DOUBLE_CLICK_LO 0.02
+#endif
+#ifndef NK_GLFW_DOUBLE_CLICK_HI
+#define NK_GLFW_DOUBLE_CLICK_HI 0.2
+#endif
+
+struct nk_glfw_device {
+    struct nk_buffer cmds;
+    struct nk_draw_null_texture null;
+    GLuint font_tex;
+};
+
+struct nk_glfw_vertex {
+    float position[2];
+    float uv[2];
+    nk_byte col[4];
+};
+
+static struct nk_glfw {
+    GLFWwindow *win;
+    int width, height;
+    int display_width, display_height;
+    struct nk_glfw_device ogl;
+    struct nk_context ctx;
+    struct nk_font_atlas atlas;
+    struct nk_vec2 fb_scale;
+    unsigned int text[NK_GLFW_TEXT_MAX];
+    int text_len;
+    struct nk_vec2 scroll;
+    double last_button_click;
+    int is_double_click_down;
+    struct nk_vec2 double_click_pos;
+} glfw;
+
+NK_INTERN void
+nk_glfw3_device_upload_atlas(const void *image, int width, int height)
+{
+    struct nk_glfw_device *dev = &glfw.ogl;
+    glGenTextures(1, &dev->font_tex);
+    glBindTexture(GL_TEXTURE_2D, dev->font_tex);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image);
+}
+
+NK_API void
+nk_glfw3_render(enum nk_anti_aliasing AA)
+{
+    /* setup global state */
+    struct nk_glfw_device *dev = &glfw.ogl;
+    glPushAttrib(GL_ENABLE_BIT|GL_COLOR_BUFFER_BIT|GL_TRANSFORM_BIT);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glEnable(GL_SCISSOR_TEST);
+    glEnable(GL_BLEND);
+    glEnable(GL_TEXTURE_2D);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    /* setup viewport/project */
+    glViewport(0,0,(GLsizei)glfw.display_width,(GLsizei)glfw.display_height);
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadIdentity();
+    glOrtho(0.0f, glfw.width, glfw.height, 0.0f, -1.0f, 1.0f);
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glLoadIdentity();
+
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glEnableClientState(GL_COLOR_ARRAY);
+    {
+        GLsizei vs = sizeof(struct nk_glfw_vertex);
+        size_t vp = offsetof(struct nk_glfw_vertex, position);
+        size_t vt = offsetof(struct nk_glfw_vertex, uv);
+        size_t vc = offsetof(struct nk_glfw_vertex, col);
+
+        /* convert from command queue into draw list and draw to screen */
+        const struct nk_draw_command *cmd;
+        const nk_draw_index *offset = NULL;
+        struct nk_buffer vbuf, ebuf;
+
+        /* fill convert configuration */
+        struct nk_convert_config config;
+        static const struct nk_draw_vertex_layout_element vertex_layout[] = {
+            {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_glfw_vertex, position)},
+            {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_glfw_vertex, uv)},
+            {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_glfw_vertex, col)},
+            {NK_VERTEX_LAYOUT_END}
+        };
+        NK_MEMSET(&config, 0, sizeof(config));
+        config.vertex_layout = vertex_layout;
+        config.vertex_size = sizeof(struct nk_glfw_vertex);
+        config.vertex_alignment = NK_ALIGNOF(struct nk_glfw_vertex);
+        config.null = dev->null;
+        config.circle_segment_count = 22;
+        config.curve_segment_count = 22;
+        config.arc_segment_count = 22;
+        config.global_alpha = 1.0f;
+        config.shape_AA = AA;
+        config.line_AA = AA;
+
+        /* convert shapes into vertexes */
+        nk_buffer_init_default(&vbuf);
+        nk_buffer_init_default(&ebuf);
+        nk_convert(&glfw.ctx, &dev->cmds, &vbuf, &ebuf, &config);
+
+        /* setup vertex buffer pointer */
+        {const void *vertices = nk_buffer_memory_const(&vbuf);
+        glVertexPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vp));
+        glTexCoordPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vt));
+        glColorPointer(4, GL_UNSIGNED_BYTE, vs, (const void*)((const nk_byte*)vertices + vc));}
+
+        /* iterate over and execute each draw command */
+        offset = (const nk_draw_index*)nk_buffer_memory_const(&ebuf);
+        nk_draw_foreach(cmd, &glfw.ctx, &dev->cmds)
+        {
+            if (!cmd->elem_count) continue;
+            glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
+            glScissor(
+                (GLint)(cmd->clip_rect.x * glfw.fb_scale.x),
+                (GLint)((glfw.height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * glfw.fb_scale.y),
+                (GLint)(cmd->clip_rect.w * glfw.fb_scale.x),
+                (GLint)(cmd->clip_rect.h * glfw.fb_scale.y));
+            glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
+            offset += cmd->elem_count;
+        }
+        nk_clear(&glfw.ctx);
+        nk_buffer_free(&vbuf);
+        nk_buffer_free(&ebuf);
+    }
+
+    /* default OpenGL state */
+    glDisableClientState(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+    glDisableClientState(GL_COLOR_ARRAY);
+
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_SCISSOR_TEST);
+    glDisable(GL_BLEND);
+    glDisable(GL_TEXTURE_2D);
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glPopAttrib();
+}
+
+NK_API void
+nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint)
+{
+    (void)win;
+    if (glfw.text_len < NK_GLFW_TEXT_MAX)
+        glfw.text[glfw.text_len++] = codepoint;
+}
+
+NK_API void
+nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff)
+{
+    (void)win; (void)xoff;
+    glfw.scroll.x += (float)xoff;
+    glfw.scroll.y += (float)yoff;
+}
+
+NK_API void
+nk_glfw3_mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
+{
+    double x, y;
+    if (button != GLFW_MOUSE_BUTTON_LEFT) return;
+    glfwGetCursorPos(window, &x, &y);
+    if (action == GLFW_PRESS)  {
+        double dt = glfwGetTime() - glfw.last_button_click;
+        if (dt > NK_GLFW_DOUBLE_CLICK_LO && dt < NK_GLFW_DOUBLE_CLICK_HI) {
+            glfw.is_double_click_down = nk_true;
+            glfw.double_click_pos = nk_vec2((float)x, (float)y);
+        }
+        glfw.last_button_click = glfwGetTime();
+    } else glfw.is_double_click_down = nk_false;
+}
+
+NK_INTERN void
+nk_glfw3_clipboard_paste(nk_handle usr, struct nk_text_edit *edit)
+{
+    const char *text = glfwGetClipboardString(glfw.win);
+    if (text) nk_textedit_paste(edit, text, nk_strlen(text));
+    (void)usr;
+}
+
+NK_INTERN void
+nk_glfw3_clipboard_copy(nk_handle usr, const char *text, int len)
+{
+    char *str = 0;
+    (void)usr;
+    if (!len) return;
+    str = (char*)malloc((size_t)len+1);
+    if (!str) return;
+    NK_MEMCPY(str, text, (size_t)len);
+    str[len] = '\0';
+    glfwSetClipboardString(glfw.win, str);
+    free(str);
+}
+
+NK_API struct nk_context*
+nk_glfw3_init(GLFWwindow *win, enum nk_glfw_init_state init_state)
+{
+    glfw.win = win;
+    if (init_state == NK_GLFW3_INSTALL_CALLBACKS) {
+        glfwSetScrollCallback(win, nk_gflw3_scroll_callback);
+        glfwSetCharCallback(win, nk_glfw3_char_callback);
+        glfwSetMouseButtonCallback(win, nk_glfw3_mouse_button_callback);
+    }
+    nk_init_default(&glfw.ctx, 0);
+    glfw.ctx.clip.copy = nk_glfw3_clipboard_copy;
+    glfw.ctx.clip.paste = nk_glfw3_clipboard_paste;
+    glfw.ctx.clip.userdata = nk_handle_ptr(0);
+    nk_buffer_init_default(&glfw.ogl.cmds);
+
+    glfw.is_double_click_down = nk_false;
+    glfw.double_click_pos = nk_vec2(0, 0);
+
+    return &glfw.ctx;
+}
+
+NK_API void
+nk_glfw3_font_stash_begin(struct nk_font_atlas **atlas)
+{
+    nk_font_atlas_init_default(&glfw.atlas);
+    nk_font_atlas_begin(&glfw.atlas);
+    *atlas = &glfw.atlas;
+}
+
+NK_API void
+nk_glfw3_font_stash_end(void)
+{
+    const void *image; int w, h;
+    image = nk_font_atlas_bake(&glfw.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
+    nk_glfw3_device_upload_atlas(image, w, h);
+    nk_font_atlas_end(&glfw.atlas, nk_handle_id((int)glfw.ogl.font_tex), &glfw.ogl.null);
+    if (glfw.atlas.default_font)
+        nk_style_set_font(&glfw.ctx, &glfw.atlas.default_font->handle);
+}
+
+NK_API void
+nk_glfw3_new_frame(void)
+{
+    int i;
+    double x, y;
+    struct nk_context *ctx = &glfw.ctx;
+    struct GLFWwindow *win = glfw.win;
+
+    glfwGetWindowSize(win, &glfw.width, &glfw.height);
+    glfwGetFramebufferSize(win, &glfw.display_width, &glfw.display_height);
+    glfw.fb_scale.x = (float)glfw.display_width/(float)glfw.width;
+    glfw.fb_scale.y = (float)glfw.display_height/(float)glfw.height;
+
+    nk_input_begin(ctx);
+    for (i = 0; i < glfw.text_len; ++i)
+        nk_input_unicode(ctx, glfw.text[i]);
+
+    /* optional grabbing behavior */
+    if (ctx->input.mouse.grab)
+        glfwSetInputMode(glfw.win, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
+    else if (ctx->input.mouse.ungrab)
+        glfwSetInputMode(glfw.win, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+
+    nk_input_key(ctx, NK_KEY_DEL, glfwGetKey(win, GLFW_KEY_DELETE) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_ENTER, glfwGetKey(win, GLFW_KEY_ENTER) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_TAB, glfwGetKey(win, GLFW_KEY_TAB) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_BACKSPACE, glfwGetKey(win, GLFW_KEY_BACKSPACE) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_UP, glfwGetKey(win, GLFW_KEY_UP) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_DOWN, glfwGetKey(win, GLFW_KEY_DOWN) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_TEXT_START, glfwGetKey(win, GLFW_KEY_HOME) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_TEXT_END, glfwGetKey(win, GLFW_KEY_END) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_SCROLL_START, glfwGetKey(win, GLFW_KEY_HOME) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_SCROLL_END, glfwGetKey(win, GLFW_KEY_END) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_SCROLL_DOWN, glfwGetKey(win, GLFW_KEY_PAGE_DOWN) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_SCROLL_UP, glfwGetKey(win, GLFW_KEY_PAGE_UP) == GLFW_PRESS);
+    nk_input_key(ctx, NK_KEY_SHIFT, glfwGetKey(win, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS||
+                                    glfwGetKey(win, GLFW_KEY_RIGHT_SHIFT) == GLFW_PRESS);
+
+    if (glfwGetKey(win, GLFW_KEY_LEFT_CONTROL) == GLFW_PRESS ||
+        glfwGetKey(win, GLFW_KEY_RIGHT_CONTROL) == GLFW_PRESS) {
+        nk_input_key(ctx, NK_KEY_COPY, glfwGetKey(win, GLFW_KEY_C) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_PASTE, glfwGetKey(win, GLFW_KEY_V) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_CUT, glfwGetKey(win, GLFW_KEY_X) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_UNDO, glfwGetKey(win, GLFW_KEY_Z) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_REDO, glfwGetKey(win, GLFW_KEY_R) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, glfwGetKey(win, GLFW_KEY_LEFT) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, glfwGetKey(win, GLFW_KEY_RIGHT) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_LINE_START, glfwGetKey(win, GLFW_KEY_B) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_TEXT_LINE_END, glfwGetKey(win, GLFW_KEY_E) == GLFW_PRESS);
+    } else {
+        nk_input_key(ctx, NK_KEY_LEFT, glfwGetKey(win, GLFW_KEY_LEFT) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_RIGHT, glfwGetKey(win, GLFW_KEY_RIGHT) == GLFW_PRESS);
+        nk_input_key(ctx, NK_KEY_COPY, 0);
+        nk_input_key(ctx, NK_KEY_PASTE, 0);
+        nk_input_key(ctx, NK_KEY_CUT, 0);
+        nk_input_key(ctx, NK_KEY_SHIFT, 0);
+    }
+
+    glfwGetCursorPos(win, &x, &y);
+    nk_input_motion(ctx, (int)x, (int)y);
+    if (ctx->input.mouse.grabbed) {
+        glfwSetCursorPos(glfw.win, (double)ctx->input.mouse.prev.x, (double)ctx->input.mouse.prev.y);
+        ctx->input.mouse.pos.x = ctx->input.mouse.prev.x;
+        ctx->input.mouse.pos.y = ctx->input.mouse.prev.y;
+    }
+
+    nk_input_button(ctx, NK_BUTTON_LEFT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS);
+    nk_input_button(ctx, NK_BUTTON_MIDDLE, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_MIDDLE) == GLFW_PRESS);
+    nk_input_button(ctx, NK_BUTTON_RIGHT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS);
+    nk_input_button(ctx, NK_BUTTON_DOUBLE, (int)glfw.double_click_pos.x, (int)glfw.double_click_pos.y, glfw.is_double_click_down);
+    nk_input_scroll(ctx, glfw.scroll);
+    nk_input_end(&glfw.ctx);
+    glfw.text_len = 0;
+    glfw.scroll = nk_vec2(0,0);
+}
+
+NK_API
+void nk_glfw3_shutdown(void)
+{
+    struct nk_glfw_device *dev = &glfw.ogl;
+    nk_font_atlas_clear(&glfw.atlas);
+    nk_free(&glfw.ctx);
+    glDeleteTextures(1, &dev->font_tex);
+    nk_buffer_free(&dev->cmds);
+    NK_MEMSET(&glfw, 0, sizeof(glfw));
+}
+
+#endif

src/ThirdParty/glfw/deps/tinycthread.c

@@ -0,0 +1,594 @@
+/* -*- mode: c; tab-width: 2; indent-tabs-mode: nil; -*-
+Copyright (c) 2012 Marcus Geelnard
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
+/* 2013-01-06 Camilla Löwy <elmindreda@glfw.org>
+ *
+ * Added casts from time_t to DWORD to avoid warnings on VC++.
+ * Fixed time retrieval on POSIX systems.
+ */
+
+#include "tinycthread.h"
+#include <stdlib.h>
+
+/* Platform specific includes */
+#if defined(_TTHREAD_POSIX_)
+  #include <signal.h>
+  #include <sched.h>
+  #include <unistd.h>
+  #include <sys/time.h>
+  #include <errno.h>
+#elif defined(_TTHREAD_WIN32_)
+  #include <process.h>
+  #include <sys/timeb.h>
+#endif
+
+/* Standard, good-to-have defines */
+#ifndef NULL
+  #define NULL (void*)0
+#endif
+#ifndef TRUE
+  #define TRUE 1
+#endif
+#ifndef FALSE
+  #define FALSE 0
+#endif
+
+int mtx_init(mtx_t *mtx, int type)
+{
+#if defined(_TTHREAD_WIN32_)
+  mtx->mAlreadyLocked = FALSE;
+  mtx->mRecursive = type & mtx_recursive;
+  InitializeCriticalSection(&mtx->mHandle);
+  return thrd_success;
+#else
+  int ret;
+  pthread_mutexattr_t attr;
+  pthread_mutexattr_init(&attr);
+  if (type & mtx_recursive)
+  {
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+  }
+  ret = pthread_mutex_init(mtx, &attr);
+  pthread_mutexattr_destroy(&attr);
+  return ret == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+void mtx_destroy(mtx_t *mtx)
+{
+#if defined(_TTHREAD_WIN32_)
+  DeleteCriticalSection(&mtx->mHandle);
+#else
+  pthread_mutex_destroy(mtx);
+#endif
+}
+
+int mtx_lock(mtx_t *mtx)
+{
+#if defined(_TTHREAD_WIN32_)
+  EnterCriticalSection(&mtx->mHandle);
+  if (!mtx->mRecursive)
+  {
+    while(mtx->mAlreadyLocked) Sleep(1000); /* Simulate deadlock... */
+    mtx->mAlreadyLocked = TRUE;
+  }
+  return thrd_success;
+#else
+  return pthread_mutex_lock(mtx) == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+int mtx_timedlock(mtx_t *mtx, const struct timespec *ts)
+{
+  /* FIXME! */
+  (void)mtx;
+  (void)ts;
+  return thrd_error;
+}
+
+int mtx_trylock(mtx_t *mtx)
+{
+#if defined(_TTHREAD_WIN32_)
+  int ret = TryEnterCriticalSection(&mtx->mHandle) ? thrd_success : thrd_busy;
+  if ((!mtx->mRecursive) && (ret == thrd_success) && mtx->mAlreadyLocked)
+  {
+    LeaveCriticalSection(&mtx->mHandle);
+    ret = thrd_busy;
+  }
+  return ret;
+#else
+  return (pthread_mutex_trylock(mtx) == 0) ? thrd_success : thrd_busy;
+#endif
+}
+
+int mtx_unlock(mtx_t *mtx)
+{
+#if defined(_TTHREAD_WIN32_)
+  mtx->mAlreadyLocked = FALSE;
+  LeaveCriticalSection(&mtx->mHandle);
+  return thrd_success;
+#else
+  return pthread_mutex_unlock(mtx) == 0 ? thrd_success : thrd_error;;
+#endif
+}
+
+#if defined(_TTHREAD_WIN32_)
+#define _CONDITION_EVENT_ONE 0
+#define _CONDITION_EVENT_ALL 1
+#endif
+
+int cnd_init(cnd_t *cond)
+{
+#if defined(_TTHREAD_WIN32_)
+  cond->mWaitersCount = 0;
+
+  /* Init critical section */
+  InitializeCriticalSection(&cond->mWaitersCountLock);
+
+  /* Init events */
+  cond->mEvents[_CONDITION_EVENT_ONE] = CreateEvent(NULL, FALSE, FALSE, NULL);
+  if (cond->mEvents[_CONDITION_EVENT_ONE] == NULL)
+  {
+    cond->mEvents[_CONDITION_EVENT_ALL] = NULL;
+    return thrd_error;
+  }
+  cond->mEvents[_CONDITION_EVENT_ALL] = CreateEvent(NULL, TRUE, FALSE, NULL);
+  if (cond->mEvents[_CONDITION_EVENT_ALL] == NULL)
+  {
+    CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]);
+    cond->mEvents[_CONDITION_EVENT_ONE] = NULL;
+    return thrd_error;
+  }
+
+  return thrd_success;
+#else
+  return pthread_cond_init(cond, NULL) == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+void cnd_destroy(cnd_t *cond)
+{
+#if defined(_TTHREAD_WIN32_)
+  if (cond->mEvents[_CONDITION_EVENT_ONE] != NULL)
+  {
+    CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]);
+  }
+  if (cond->mEvents[_CONDITION_EVENT_ALL] != NULL)
+  {
+    CloseHandle(cond->mEvents[_CONDITION_EVENT_ALL]);
+  }
+  DeleteCriticalSection(&cond->mWaitersCountLock);
+#else
+  pthread_cond_destroy(cond);
+#endif
+}
+
+int cnd_signal(cnd_t *cond)
+{
+#if defined(_TTHREAD_WIN32_)
+  int haveWaiters;
+
+  /* Are there any waiters? */
+  EnterCriticalSection(&cond->mWaitersCountLock);
+  haveWaiters = (cond->mWaitersCount > 0);
+  LeaveCriticalSection(&cond->mWaitersCountLock);
+
+  /* If we have any waiting threads, send them a signal */
+  if(haveWaiters)
+  {
+    if (SetEvent(cond->mEvents[_CONDITION_EVENT_ONE]) == 0)
+    {
+      return thrd_error;
+    }
+  }
+
+  return thrd_success;
+#else
+  return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+int cnd_broadcast(cnd_t *cond)
+{
+#if defined(_TTHREAD_WIN32_)
+  int haveWaiters;
+
+  /* Are there any waiters? */
+  EnterCriticalSection(&cond->mWaitersCountLock);
+  haveWaiters = (cond->mWaitersCount > 0);
+  LeaveCriticalSection(&cond->mWaitersCountLock);
+
+  /* If we have any waiting threads, send them a signal */
+  if(haveWaiters)
+  {
+    if (SetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0)
+    {
+      return thrd_error;
+    }
+  }
+
+  return thrd_success;
+#else
+  return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+#if defined(_TTHREAD_WIN32_)
+static int _cnd_timedwait_win32(cnd_t *cond, mtx_t *mtx, DWORD timeout)
+{
+  int result, lastWaiter;
+
+  /* Increment number of waiters */
+  EnterCriticalSection(&cond->mWaitersCountLock);
+  ++ cond->mWaitersCount;
+  LeaveCriticalSection(&cond->mWaitersCountLock);
+
+  /* Release the mutex while waiting for the condition (will decrease
+     the number of waiters when done)... */
+  mtx_unlock(mtx);
+
+  /* Wait for either event to become signaled due to cnd_signal() or
+     cnd_broadcast() being called */
+  result = WaitForMultipleObjects(2, cond->mEvents, FALSE, timeout);
+  if (result == WAIT_TIMEOUT)
+  {
+    return thrd_timeout;
+  }
+  else if (result == (int)WAIT_FAILED)
+  {
+    return thrd_error;
+  }
+
+  /* Check if we are the last waiter */
+  EnterCriticalSection(&cond->mWaitersCountLock);
+  -- cond->mWaitersCount;
+  lastWaiter = (result == (WAIT_OBJECT_0 + _CONDITION_EVENT_ALL)) &&
+               (cond->mWaitersCount == 0);
+  LeaveCriticalSection(&cond->mWaitersCountLock);
+
+  /* If we are the last waiter to be notified to stop waiting, reset the event */
+  if (lastWaiter)
+  {
+    if (ResetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0)
+    {
+      return thrd_error;
+    }
+  }
+
+  /* Re-acquire the mutex */
+  mtx_lock(mtx);
+
+  return thrd_success;
+}
+#endif
+
+int cnd_wait(cnd_t *cond, mtx_t *mtx)
+{
+#if defined(_TTHREAD_WIN32_)
+  return _cnd_timedwait_win32(cond, mtx, INFINITE);
+#else
+  return pthread_cond_wait(cond, mtx) == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+int cnd_timedwait(cnd_t *cond, mtx_t *mtx, const struct timespec *ts)
+{
+#if defined(_TTHREAD_WIN32_)
+  struct timespec now;
+  if (clock_gettime(CLOCK_REALTIME, &now) == 0)
+  {
+    DWORD delta = (DWORD) ((ts->tv_sec - now.tv_sec) * 1000 +
+                           (ts->tv_nsec - now.tv_nsec + 500000) / 1000000);
+    return _cnd_timedwait_win32(cond, mtx, delta);
+  }
+  else
+    return thrd_error;
+#else
+  int ret;
+  ret = pthread_cond_timedwait(cond, mtx, ts);
+  if (ret == ETIMEDOUT)
+  {
+    return thrd_timeout;
+  }
+  return ret == 0 ? thrd_success : thrd_error;
+#endif
+}
+
+
+/** Information to pass to the new thread (what to run). */
+typedef struct {
+  thrd_start_t mFunction; /**< Pointer to the function to be executed. */
+  void * mArg;            /**< Function argument for the thread function. */
+} _thread_start_info;
+
+/* Thread wrapper function. */
+#if defined(_TTHREAD_WIN32_)
+static unsigned WINAPI _thrd_wrapper_function(void * aArg)
+#elif defined(_TTHREAD_POSIX_)
+static void * _thrd_wrapper_function(void * aArg)
+#endif
+{
+  thrd_start_t fun;
+  void *arg;
+  int  res;
+#if defined(_TTHREAD_POSIX_)
+  void *pres;
+#endif
+
+  /* Get thread startup information */
+  _thread_start_info *ti = (_thread_start_info *) aArg;
+  fun = ti->mFunction;
+  arg = ti->mArg;
+
+  /* The thread is responsible for freeing the startup information */
+  free((void *)ti);
+
+  /* Call the actual client thread function */
+  res = fun(arg);
+
+#if defined(_TTHREAD_WIN32_)
+  return res;
+#else
+  pres = malloc(sizeof(int));
+  if (pres != NULL)
+  {
+    *(int*)pres = res;
+  }
+  return pres;
+#endif
+}
+
+int thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
+{
+  /* Fill out the thread startup information (passed to the thread wrapper,
+     which will eventually free it) */
+  _thread_start_info* ti = (_thread_start_info*)malloc(sizeof(_thread_start_info));
+  if (ti == NULL)
+  {
+    return thrd_nomem;
+  }
+  ti->mFunction = func;
+  ti->mArg = arg;
+
+  /* Create the thread */
+#if defined(_TTHREAD_WIN32_)
+  *thr = (HANDLE)_beginthreadex(NULL, 0, _thrd_wrapper_function, (void *)ti, 0, NULL);
+#elif defined(_TTHREAD_POSIX_)
+  if(pthread_create(thr, NULL, _thrd_wrapper_function, (void *)ti) != 0)
+  {
+    *thr = 0;
+  }
+#endif
+
+  /* Did we fail to create the thread? */
+  if(!*thr)
+  {
+    free(ti);
+    return thrd_error;
+  }
+
+  return thrd_success;
+}
+
+thrd_t thrd_current(void)
+{
+#if defined(_TTHREAD_WIN32_)
+  return GetCurrentThread();
+#else
+  return pthread_self();
+#endif
+}
+
+int thrd_detach(thrd_t thr)
+{
+  /* FIXME! */
+  (void)thr;
+  return thrd_error;
+}
+
+int thrd_equal(thrd_t thr0, thrd_t thr1)
+{
+#if defined(_TTHREAD_WIN32_)
+  return thr0 == thr1;
+#else
+  return pthread_equal(thr0, thr1);
+#endif
+}
+
+void thrd_exit(int res)
+{
+#if defined(_TTHREAD_WIN32_)
+  ExitThread(res);
+#else
+  void *pres = malloc(sizeof(int));
+  if (pres != NULL)
+  {
+    *(int*)pres = res;
+  }
+  pthread_exit(pres);
+#endif
+}
+
+int thrd_join(thrd_t thr, int *res)
+{
+#if defined(_TTHREAD_WIN32_)
+  if (WaitForSingleObject(thr, INFINITE) == WAIT_FAILED)
+  {
+    return thrd_error;
+  }
+  if (res != NULL)
+  {
+    DWORD dwRes;
+    GetExitCodeThread(thr, &dwRes);
+    *res = dwRes;
+  }
+#elif defined(_TTHREAD_POSIX_)
+  void *pres;
+  int ires = 0;
+  if (pthread_join(thr, &pres) != 0)
+  {
+    return thrd_error;
+  }
+  if (pres != NULL)
+  {
+    ires = *(int*)pres;
+    free(pres);
+  }
+  if (res != NULL)
+  {
+    *res = ires;
+  }
+#endif
+  return thrd_success;
+}
+
+int thrd_sleep(const struct timespec *time_point, struct timespec *remaining)
+{
+  struct timespec now;
+#if defined(_TTHREAD_WIN32_)
+  DWORD delta;
+#else
+  long delta;
+#endif
+
+  /* Get the current time */
+  if (clock_gettime(CLOCK_REALTIME, &now) != 0)
+    return -2;  // FIXME: Some specific error code?
+
+#if defined(_TTHREAD_WIN32_)
+  /* Delta in milliseconds */
+  delta = (DWORD) ((time_point->tv_sec - now.tv_sec) * 1000 +
+                   (time_point->tv_nsec - now.tv_nsec + 500000) / 1000000);
+  if (delta > 0)
+  {
+    Sleep(delta);
+  }
+#else
+  /* Delta in microseconds */
+  delta = (time_point->tv_sec - now.tv_sec) * 1000000L +
+          (time_point->tv_nsec - now.tv_nsec + 500L) / 1000L;
+
+  /* On some systems, the usleep argument must be < 1000000 */
+  while (delta > 999999L)
+  {
+    usleep(999999);
+    delta -= 999999L;
+  }
+  if (delta > 0L)
+  {
+    usleep((useconds_t)delta);
+  }
+#endif
+
+  /* We don't support waking up prematurely (yet) */
+  if (remaining)
+  {
+    remaining->tv_sec = 0;
+    remaining->tv_nsec = 0;
+  }
+  return 0;
+}
+
+void thrd_yield(void)
+{
+#if defined(_TTHREAD_WIN32_)
+  Sleep(0);
+#else
+  sched_yield();
+#endif
+}
+
+int tss_create(tss_t *key, tss_dtor_t dtor)
+{
+#if defined(_TTHREAD_WIN32_)
+  /* FIXME: The destructor function is not supported yet... */
+  if (dtor != NULL)
+  {
+    return thrd_error;
+  }
+  *key = TlsAlloc();
+  if (*key == TLS_OUT_OF_INDEXES)
+  {
+    return thrd_error;
+  }
+#else
+  if (pthread_key_create(key, dtor) != 0)
+  {
+    return thrd_error;
+  }
+#endif
+  return thrd_success;
+}
+
+void tss_delete(tss_t key)
+{
+#if defined(_TTHREAD_WIN32_)
+  TlsFree(key);
+#else
+  pthread_key_delete(key);
+#endif
+}
+
+void *tss_get(tss_t key)
+{
+#if defined(_TTHREAD_WIN32_)
+  return TlsGetValue(key);
+#else
+  return pthread_getspecific(key);
+#endif
+}
+
+int tss_set(tss_t key, void *val)
+{
+#if defined(_TTHREAD_WIN32_)
+  if (TlsSetValue(key, val) == 0)
+  {
+    return thrd_error;
+  }
+#else
+  if (pthread_setspecific(key, val) != 0)
+  {
+    return thrd_error;
+  }
+#endif
+  return thrd_success;
+}
+
+#if defined(_TTHREAD_EMULATE_CLOCK_GETTIME_)
+int _tthread_clock_gettime(clockid_t clk_id, struct timespec *ts)
+{
+#if defined(_TTHREAD_WIN32_)
+  struct _timeb tb;
+  _ftime(&tb);
+  ts->tv_sec = (time_t)tb.time;
+  ts->tv_nsec = 1000000L * (long)tb.millitm;
+#else
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  ts->tv_sec = (time_t)tv.tv_sec;
+  ts->tv_nsec = 1000L * (long)tv.tv_usec;
+#endif
+  return 0;
+}
+#endif // _TTHREAD_EMULATE_CLOCK_GETTIME_
+

src/ThirdParty/glfw/deps/tinycthread.h

@@ -0,0 +1,443 @@
+/* -*- mode: c; tab-width: 2; indent-tabs-mode: nil; -*-
+Copyright (c) 2012 Marcus Geelnard
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
+#ifndef _TINYCTHREAD_H_
+#define _TINYCTHREAD_H_
+
+/**
+* @file
+* @mainpage TinyCThread API Reference
+*
+* @section intro_sec Introduction
+* TinyCThread is a minimal, portable implementation of basic threading
+* classes for C.
+*
+* They closely mimic the functionality and naming of the C11 standard, and
+* should be easily replaceable with the corresponding standard variants.
+*
+* @section port_sec Portability
+* The Win32 variant uses the native Win32 API for implementing the thread
+* classes, while for other systems, the POSIX threads API (pthread) is used.
+*
+* @section misc_sec Miscellaneous
+* The following special keywords are available: #_Thread_local.
+*
+* For more detailed information, browse the different sections of this
+* documentation. A good place to start is:
+* tinycthread.h.
+*/
+
+/* Which platform are we on? */
+#if !defined(_TTHREAD_PLATFORM_DEFINED_)
+  #if defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__)
+    #define _TTHREAD_WIN32_
+  #else
+    #define _TTHREAD_POSIX_
+  #endif
+  #define _TTHREAD_PLATFORM_DEFINED_
+#endif
+
+/* Activate some POSIX functionality (e.g. clock_gettime and recursive mutexes) */
+#if defined(_TTHREAD_POSIX_)
+  #undef _FEATURES_H
+  #if !defined(_GNU_SOURCE)
+    #define _GNU_SOURCE
+  #endif
+  #if !defined(_POSIX_C_SOURCE) || ((_POSIX_C_SOURCE - 0) < 199309L)
+    #undef _POSIX_C_SOURCE
+    #define _POSIX_C_SOURCE 199309L
+  #endif
+  #if !defined(_XOPEN_SOURCE) || ((_XOPEN_SOURCE - 0) < 500)
+    #undef _XOPEN_SOURCE
+    #define _XOPEN_SOURCE 500
+  #endif
+#endif
+
+/* Generic includes */
+#include <time.h>
+
+/* Platform specific includes */
+#if defined(_TTHREAD_POSIX_)
+  #include <sys/time.h>
+  #include <pthread.h>
+#elif defined(_TTHREAD_WIN32_)
+  #ifndef WIN32_LEAN_AND_MEAN
+    #define WIN32_LEAN_AND_MEAN
+    #define __UNDEF_LEAN_AND_MEAN
+  #endif
+  #include <windows.h>
+  #ifdef __UNDEF_LEAN_AND_MEAN
+    #undef WIN32_LEAN_AND_MEAN
+    #undef __UNDEF_LEAN_AND_MEAN
+  #endif
+#endif
+
+/* Workaround for missing TIME_UTC: If time.h doesn't provide TIME_UTC,
+   it's quite likely that libc does not support it either. Hence, fall back to
+   the only other supported time specifier: CLOCK_REALTIME (and if that fails,
+   we're probably emulating clock_gettime anyway, so anything goes). */
+#ifndef TIME_UTC
+  #ifdef CLOCK_REALTIME
+    #define TIME_UTC CLOCK_REALTIME
+  #else
+    #define TIME_UTC 0
+  #endif
+#endif
+
+/* Workaround for missing clock_gettime (most Windows compilers, afaik) */
+#if defined(_TTHREAD_WIN32_) || defined(__APPLE_CC__)
+#define _TTHREAD_EMULATE_CLOCK_GETTIME_
+/* Emulate struct timespec */
+#if defined(_TTHREAD_WIN32_)
+struct _ttherad_timespec {
+  time_t tv_sec;
+  long   tv_nsec;
+};
+#define timespec _ttherad_timespec
+#endif
+
+/* Emulate clockid_t */
+typedef int _tthread_clockid_t;
+#define clockid_t _tthread_clockid_t
+
+/* Emulate clock_gettime */
+int _tthread_clock_gettime(clockid_t clk_id, struct timespec *ts);
+#define clock_gettime _tthread_clock_gettime
+#ifndef CLOCK_REALTIME
+  #define CLOCK_REALTIME 0
+#endif
+#endif
+
+
+/** TinyCThread version (major number). */
+#define TINYCTHREAD_VERSION_MAJOR 1
+/** TinyCThread version (minor number). */
+#define TINYCTHREAD_VERSION_MINOR 1
+/** TinyCThread version (full version). */
+#define TINYCTHREAD_VERSION (TINYCTHREAD_VERSION_MAJOR * 100 + TINYCTHREAD_VERSION_MINOR)
+
+/**
+* @def _Thread_local
+* Thread local storage keyword.
+* A variable that is declared with the @c _Thread_local keyword makes the
+* value of the variable local to each thread (known as thread-local storage,
+* or TLS). Example usage:
+* @code
+* // This variable is local to each thread.
+* _Thread_local int variable;
+* @endcode
+* @note The @c _Thread_local keyword is a macro that maps to the corresponding
+* compiler directive (e.g. @c __declspec(thread)).
+* @note This directive is currently not supported on Mac OS X (it will give
+* a compiler error), since compile-time TLS is not supported in the Mac OS X
+* executable format. Also, some older versions of MinGW (before GCC 4.x) do
+* not support this directive.
+* @hideinitializer
+*/
+
+/* FIXME: Check for a PROPER value of __STDC_VERSION__ to know if we have C11 */
+#if !(defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201102L)) && !defined(_Thread_local)
+ #if defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_CC) || defined(__IBMCPP__)
+  #define _Thread_local __thread
+ #else
+  #define _Thread_local __declspec(thread)
+ #endif
+#endif
+
+/* Macros */
+#define TSS_DTOR_ITERATIONS 0
+
+/* Function return values */
+#define thrd_error    0 /**< The requested operation failed */
+#define thrd_success  1 /**< The requested operation succeeded */
+#define thrd_timeout  2 /**< The time specified in the call was reached without acquiring the requested resource */
+#define thrd_busy     3 /**< The requested operation failed because a tesource requested by a test and return function is already in use */
+#define thrd_nomem    4 /**< The requested operation failed because it was unable to allocate memory */
+
+/* Mutex types */
+#define mtx_plain     1
+#define mtx_timed     2
+#define mtx_try       4
+#define mtx_recursive 8
+
+/* Mutex */
+#if defined(_TTHREAD_WIN32_)
+typedef struct {
+  CRITICAL_SECTION mHandle;   /* Critical section handle */
+  int mAlreadyLocked;         /* TRUE if the mutex is already locked */
+  int mRecursive;             /* TRUE if the mutex is recursive */
+} mtx_t;
+#else
+typedef pthread_mutex_t mtx_t;
+#endif
+
+/** Create a mutex object.
+* @param mtx A mutex object.
+* @param type Bit-mask that must have one of the following six values:
+*   @li @c mtx_plain for a simple non-recursive mutex
+*   @li @c mtx_timed for a non-recursive mutex that supports timeout
+*   @li @c mtx_try for a non-recursive mutex that supports test and return
+*   @li @c mtx_plain | @c mtx_recursive (same as @c mtx_plain, but recursive)
+*   @li @c mtx_timed | @c mtx_recursive (same as @c mtx_timed, but recursive)
+*   @li @c mtx_try | @c mtx_recursive (same as @c mtx_try, but recursive)
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int mtx_init(mtx_t *mtx, int type);
+
+/** Release any resources used by the given mutex.
+* @param mtx A mutex object.
+*/
+void mtx_destroy(mtx_t *mtx);
+
+/** Lock the given mutex.
+* Blocks until the given mutex can be locked. If the mutex is non-recursive, and
+* the calling thread already has a lock on the mutex, this call will block
+* forever.
+* @param mtx A mutex object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int mtx_lock(mtx_t *mtx);
+
+/** NOT YET IMPLEMENTED.
+*/
+int mtx_timedlock(mtx_t *mtx, const struct timespec *ts);
+
+/** Try to lock the given mutex.
+* The specified mutex shall support either test and return or timeout. If the
+* mutex is already locked, the function returns without blocking.
+* @param mtx A mutex object.
+* @return @ref thrd_success on success, or @ref thrd_busy if the resource
+* requested is already in use, or @ref thrd_error if the request could not be
+* honored.
+*/
+int mtx_trylock(mtx_t *mtx);
+
+/** Unlock the given mutex.
+* @param mtx A mutex object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int mtx_unlock(mtx_t *mtx);
+
+/* Condition variable */
+#if defined(_TTHREAD_WIN32_)
+typedef struct {
+  HANDLE mEvents[2];                  /* Signal and broadcast event HANDLEs. */
+  unsigned int mWaitersCount;         /* Count of the number of waiters. */
+  CRITICAL_SECTION mWaitersCountLock; /* Serialize access to mWaitersCount. */
+} cnd_t;
+#else
+typedef pthread_cond_t cnd_t;
+#endif
+
+/** Create a condition variable object.
+* @param cond A condition variable object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int cnd_init(cnd_t *cond);
+
+/** Release any resources used by the given condition variable.
+* @param cond A condition variable object.
+*/
+void cnd_destroy(cnd_t *cond);
+
+/** Signal a condition variable.
+* Unblocks one of the threads that are blocked on the given condition variable
+* at the time of the call. If no threads are blocked on the condition variable
+* at the time of the call, the function does nothing and return success.
+* @param cond A condition variable object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int cnd_signal(cnd_t *cond);
+
+/** Broadcast a condition variable.
+* Unblocks all of the threads that are blocked on the given condition variable
+* at the time of the call. If no threads are blocked on the condition variable
+* at the time of the call, the function does nothing and return success.
+* @param cond A condition variable object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int cnd_broadcast(cnd_t *cond);
+
+/** Wait for a condition variable to become signaled.
+* The function atomically unlocks the given mutex and endeavors to block until
+* the given condition variable is signaled by a call to cnd_signal or to
+* cnd_broadcast. When the calling thread becomes unblocked it locks the mutex
+* before it returns.
+* @param cond A condition variable object.
+* @param mtx A mutex object.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int cnd_wait(cnd_t *cond, mtx_t *mtx);
+
+/** Wait for a condition variable to become signaled.
+* The function atomically unlocks the given mutex and endeavors to block until
+* the given condition variable is signaled by a call to cnd_signal or to
+* cnd_broadcast, or until after the specified time. When the calling thread
+* becomes unblocked it locks the mutex before it returns.
+* @param cond A condition variable object.
+* @param mtx A mutex object.
+* @param xt A point in time at which the request will time out (absolute time).
+* @return @ref thrd_success upon success, or @ref thrd_timeout if the time
+* specified in the call was reached without acquiring the requested resource, or
+* @ref thrd_error if the request could not be honored.
+*/
+int cnd_timedwait(cnd_t *cond, mtx_t *mtx, const struct timespec *ts);
+
+/* Thread */
+#if defined(_TTHREAD_WIN32_)
+typedef HANDLE thrd_t;
+#else
+typedef pthread_t thrd_t;
+#endif
+
+/** Thread start function.
+* Any thread that is started with the @ref thrd_create() function must be
+* started through a function of this type.
+* @param arg The thread argument (the @c arg argument of the corresponding
+*        @ref thrd_create() call).
+* @return The thread return value, which can be obtained by another thread
+* by using the @ref thrd_join() function.
+*/
+typedef int (*thrd_start_t)(void *arg);
+
+/** Create a new thread.
+* @param thr Identifier of the newly created thread.
+* @param func A function pointer to the function that will be executed in
+*        the new thread.
+* @param arg An argument to the thread function.
+* @return @ref thrd_success on success, or @ref thrd_nomem if no memory could
+* be allocated for the thread requested, or @ref thrd_error if the request
+* could not be honored.
+* @note A thread’s identifier may be reused for a different thread once the
+* original thread has exited and either been detached or joined to another
+* thread.
+*/
+int thrd_create(thrd_t *thr, thrd_start_t func, void *arg);
+
+/** Identify the calling thread.
+* @return The identifier of the calling thread.
+*/
+thrd_t thrd_current(void);
+
+/** NOT YET IMPLEMENTED.
+*/
+int thrd_detach(thrd_t thr);
+
+/** Compare two thread identifiers.
+* The function determines if two thread identifiers refer to the same thread.
+* @return Zero if the two thread identifiers refer to different threads.
+* Otherwise a nonzero value is returned.
+*/
+int thrd_equal(thrd_t thr0, thrd_t thr1);
+
+/** Terminate execution of the calling thread.
+* @param res Result code of the calling thread.
+*/
+void thrd_exit(int res);
+
+/** Wait for a thread to terminate.
+* The function joins the given thread with the current thread by blocking
+* until the other thread has terminated.
+* @param thr The thread to join with.
+* @param res If this pointer is not NULL, the function will store the result
+*        code of the given thread in the integer pointed to by @c res.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int thrd_join(thrd_t thr, int *res);
+
+/** Put the calling thread to sleep.
+* Suspend execution of the calling thread.
+* @param time_point A point in time at which the thread will resume (absolute time).
+* @param remaining If non-NULL, this parameter will hold the remaining time until
+*                  time_point upon return. This will typically be zero, but if
+*                  the thread was woken up by a signal that is not ignored before
+*                  time_point was reached @c remaining will hold a positive
+*                  time.
+* @return 0 (zero) on successful sleep, or -1 if an interrupt occurred.
+*/
+int thrd_sleep(const struct timespec *time_point, struct timespec *remaining);
+
+/** Yield execution to another thread.
+* Permit other threads to run, even if the current thread would ordinarily
+* continue to run.
+*/
+void thrd_yield(void);
+
+/* Thread local storage */
+#if defined(_TTHREAD_WIN32_)
+typedef DWORD tss_t;
+#else
+typedef pthread_key_t tss_t;
+#endif
+
+/** Destructor function for a thread-specific storage.
+* @param val The value of the destructed thread-specific storage.
+*/
+typedef void (*tss_dtor_t)(void *val);
+
+/** Create a thread-specific storage.
+* @param key The unique key identifier that will be set if the function is
+*        successful.
+* @param dtor Destructor function. This can be NULL.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+* @note The destructor function is not supported under Windows. If @c dtor is
+* not NULL when calling this function under Windows, the function will fail
+* and return @ref thrd_error.
+*/
+int tss_create(tss_t *key, tss_dtor_t dtor);
+
+/** Delete a thread-specific storage.
+* The function releases any resources used by the given thread-specific
+* storage.
+* @param key The key that shall be deleted.
+*/
+void tss_delete(tss_t key);
+
+/** Get the value for a thread-specific storage.
+* @param key The thread-specific storage identifier.
+* @return The value for the current thread held in the given thread-specific
+* storage.
+*/
+void *tss_get(tss_t key);
+
+/** Set the value for a thread-specific storage.
+* @param key The thread-specific storage identifier.
+* @param val The value of the thread-specific storage to set for the current
+*        thread.
+* @return @ref thrd_success on success, or @ref thrd_error if the request could
+* not be honored.
+*/
+int tss_set(tss_t key, void *val);
+
+
+#endif /* _TINYTHREAD_H_ */
+

src/ThirdParty/glfw/deps/vs2008/stdint.h

@@ -0,0 +1,247 @@
+// ISO C9x  compliant stdint.h for Microsoft Visual Studio
+// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124 
+// 
+//  Copyright (c) 2006-2008 Alexander Chemeris
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// 
+//   1. Redistributions of source code must retain the above copyright notice,
+//      this list of conditions and the following disclaimer.
+// 
+//   2. Redistributions in binary form must reproduce the above copyright
+//      notice, this list of conditions and the following disclaimer in the
+//      documentation and/or other materials provided with the distribution.
+// 
+//   3. The name of the author may be used to endorse or promote products
+//      derived from this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _MSC_VER // [
+#error "Use this header only with Microsoft Visual C++ compilers!"
+#endif // _MSC_VER ]
+
+#ifndef _MSC_STDINT_H_ // [
+#define _MSC_STDINT_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#include <limits.h>
+
+// For Visual Studio 6 in C++ mode and for many Visual Studio versions when
+// compiling for ARM we should wrap <wchar.h> include with 'extern "C++" {}'
+// or compiler give many errors like this:
+//   error C2733: second C linkage of overloaded function 'wmemchr' not allowed
+#ifdef __cplusplus
+extern "C" {
+#endif
+#  include <wchar.h>
+#ifdef __cplusplus
+}
+#endif
+
+// Define _W64 macros to mark types changing their size, like intptr_t.
+#ifndef _W64
+#  if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
+#     define _W64 __w64
+#  else
+#     define _W64
+#  endif
+#endif
+
+
+// 7.18.1 Integer types
+
+// 7.18.1.1 Exact-width integer types
+
+// Visual Studio 6 and Embedded Visual C++ 4 doesn't
+// realize that, e.g. char has the same size as __int8
+// so we give up on __intX for them.
+#if (_MSC_VER < 1300)
+   typedef signed char       int8_t;
+   typedef signed short      int16_t;
+   typedef signed int        int32_t;
+   typedef unsigned char     uint8_t;
+   typedef unsigned short    uint16_t;
+   typedef unsigned int      uint32_t;
+#else
+   typedef signed __int8     int8_t;
+   typedef signed __int16    int16_t;
+   typedef signed __int32    int32_t;
+   typedef unsigned __int8   uint8_t;
+   typedef unsigned __int16  uint16_t;
+   typedef unsigned __int32  uint32_t;
+#endif
+typedef signed __int64       int64_t;
+typedef unsigned __int64     uint64_t;
+
+
+// 7.18.1.2 Minimum-width integer types
+typedef int8_t    int_least8_t;
+typedef int16_t   int_least16_t;
+typedef int32_t   int_least32_t;
+typedef int64_t   int_least64_t;
+typedef uint8_t   uint_least8_t;
+typedef uint16_t  uint_least16_t;
+typedef uint32_t  uint_least32_t;
+typedef uint64_t  uint_least64_t;
+
+// 7.18.1.3 Fastest minimum-width integer types
+typedef int8_t    int_fast8_t;
+typedef int16_t   int_fast16_t;
+typedef int32_t   int_fast32_t;
+typedef int64_t   int_fast64_t;
+typedef uint8_t   uint_fast8_t;
+typedef uint16_t  uint_fast16_t;
+typedef uint32_t  uint_fast32_t;
+typedef uint64_t  uint_fast64_t;
+
+// 7.18.1.4 Integer types capable of holding object pointers
+#ifdef _WIN64 // [
+   typedef signed __int64    intptr_t;
+   typedef unsigned __int64  uintptr_t;
+#else // _WIN64 ][
+   typedef _W64 signed int   intptr_t;
+   typedef _W64 unsigned int uintptr_t;
+#endif // _WIN64 ]
+
+// 7.18.1.5 Greatest-width integer types
+typedef int64_t   intmax_t;
+typedef uint64_t  uintmax_t;
+
+
+// 7.18.2 Limits of specified-width integer types
+
+#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [   See footnote 220 at page 257 and footnote 221 at page 259
+
+// 7.18.2.1 Limits of exact-width integer types
+#define INT8_MIN     ((int8_t)_I8_MIN)
+#define INT8_MAX     _I8_MAX
+#define INT16_MIN    ((int16_t)_I16_MIN)
+#define INT16_MAX    _I16_MAX
+#define INT32_MIN    ((int32_t)_I32_MIN)
+#define INT32_MAX    _I32_MAX
+#define INT64_MIN    ((int64_t)_I64_MIN)
+#define INT64_MAX    _I64_MAX
+#define UINT8_MAX    _UI8_MAX
+#define UINT16_MAX   _UI16_MAX
+#define UINT32_MAX   _UI32_MAX
+#define UINT64_MAX   _UI64_MAX
+
+// 7.18.2.2 Limits of minimum-width integer types
+#define INT_LEAST8_MIN    INT8_MIN
+#define INT_LEAST8_MAX    INT8_MAX
+#define INT_LEAST16_MIN   INT16_MIN
+#define INT_LEAST16_MAX   INT16_MAX
+#define INT_LEAST32_MIN   INT32_MIN
+#define INT_LEAST32_MAX   INT32_MAX
+#define INT_LEAST64_MIN   INT64_MIN
+#define INT_LEAST64_MAX   INT64_MAX
+#define UINT_LEAST8_MAX   UINT8_MAX
+#define UINT_LEAST16_MAX  UINT16_MAX
+#define UINT_LEAST32_MAX  UINT32_MAX
+#define UINT_LEAST64_MAX  UINT64_MAX
+
+// 7.18.2.3 Limits of fastest minimum-width integer types
+#define INT_FAST8_MIN    INT8_MIN
+#define INT_FAST8_MAX    INT8_MAX
+#define INT_FAST16_MIN   INT16_MIN
+#define INT_FAST16_MAX   INT16_MAX
+#define INT_FAST32_MIN   INT32_MIN
+#define INT_FAST32_MAX   INT32_MAX
+#define INT_FAST64_MIN   INT64_MIN
+#define INT_FAST64_MAX   INT64_MAX
+#define UINT_FAST8_MAX   UINT8_MAX
+#define UINT_FAST16_MAX  UINT16_MAX
+#define UINT_FAST32_MAX  UINT32_MAX
+#define UINT_FAST64_MAX  UINT64_MAX
+
+// 7.18.2.4 Limits of integer types capable of holding object pointers
+#ifdef _WIN64 // [
+#  define INTPTR_MIN   INT64_MIN
+#  define INTPTR_MAX   INT64_MAX
+#  define UINTPTR_MAX  UINT64_MAX
+#else // _WIN64 ][
+#  define INTPTR_MIN   INT32_MIN
+#  define INTPTR_MAX   INT32_MAX
+#  define UINTPTR_MAX  UINT32_MAX
+#endif // _WIN64 ]
+
+// 7.18.2.5 Limits of greatest-width integer types
+#define INTMAX_MIN   INT64_MIN
+#define INTMAX_MAX   INT64_MAX
+#define UINTMAX_MAX  UINT64_MAX
+
+// 7.18.3 Limits of other integer types
+
+#ifdef _WIN64 // [
+#  define PTRDIFF_MIN  _I64_MIN
+#  define PTRDIFF_MAX  _I64_MAX
+#else  // _WIN64 ][
+#  define PTRDIFF_MIN  _I32_MIN
+#  define PTRDIFF_MAX  _I32_MAX
+#endif  // _WIN64 ]
+
+#define SIG_ATOMIC_MIN  INT_MIN
+#define SIG_ATOMIC_MAX  INT_MAX
+
+#ifndef SIZE_MAX // [
+#  ifdef _WIN64 // [
+#     define SIZE_MAX  _UI64_MAX
+#  else // _WIN64 ][
+#     define SIZE_MAX  _UI32_MAX
+#  endif // _WIN64 ]
+#endif // SIZE_MAX ]
+
+// WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
+#ifndef WCHAR_MIN // [
+#  define WCHAR_MIN  0
+#endif  // WCHAR_MIN ]
+#ifndef WCHAR_MAX // [
+#  define WCHAR_MAX  _UI16_MAX
+#endif  // WCHAR_MAX ]
+
+#define WINT_MIN  0
+#define WINT_MAX  _UI16_MAX
+
+#endif // __STDC_LIMIT_MACROS ]
+
+
+// 7.18.4 Limits of other integer types
+
+#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [   See footnote 224 at page 260
+
+// 7.18.4.1 Macros for minimum-width integer constants
+
+#define INT8_C(val)  val##i8
+#define INT16_C(val) val##i16
+#define INT32_C(val) val##i32
+#define INT64_C(val) val##i64
+
+#define UINT8_C(val)  val##ui8
+#define UINT16_C(val) val##ui16
+#define UINT32_C(val) val##ui32
+#define UINT64_C(val) val##ui64
+
+// 7.18.4.2 Macros for greatest-width integer constants
+#define INTMAX_C   INT64_C
+#define UINTMAX_C  UINT64_C
+
+#endif // __STDC_CONSTANT_MACROS ]
+
+
+#endif // _MSC_STDINT_H_ ]

src/ThirdParty/glfw/docs/CMakeLists.txt

@@ -0,0 +1,46 @@
+
+# NOTE: The order of this list determines the order of items in the Guides
+#       (i.e. Pages) list in the generated documentation
+set(source_files
+    main.dox
+    news.dox
+    quick.dox
+    moving.dox
+    compile.dox
+    build.dox
+    intro.dox
+    context.dox
+    monitor.dox
+    window.dox
+    input.dox
+    vulkan.dox
+    compat.dox
+    internal.dox)
+
+set(extra_files DoxygenLayout.xml header.html footer.html extra.css spaces.svg)
+
+set(header_paths
+    "${GLFW_SOURCE_DIR}/include/GLFW/glfw3.h"
+    "${GLFW_SOURCE_DIR}/include/GLFW/glfw3native.h")
+
+# Format the source list into a Doxyfile INPUT value that Doxygen can parse
+foreach(path IN LISTS header_paths)
+    string(APPEND GLFW_DOXYGEN_INPUT " \\\n\"${path}\"")
+endforeach()
+foreach(file IN LISTS source_files)
+    string(APPEND GLFW_DOXYGEN_INPUT " \\\n\"${CMAKE_CURRENT_SOURCE_DIR}/${file}\"")
+endforeach()
+
+configure_file(Doxyfile.in Doxyfile @ONLY)
+
+add_custom_command(OUTPUT "html/index.html"
+                   COMMAND "${DOXYGEN_EXECUTABLE}"
+                   WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
+                   MAIN_DEPENDENCY Doxyfile
+                   DEPENDS ${header_paths} ${source_files} ${extra_files}
+                   COMMENT "Generating HTML documentation"
+                   VERBATIM)
+
+add_custom_target(docs ALL SOURCES "html/index.html")
+set_target_properties(docs PROPERTIES FOLDER "GLFW3")
+

src/ThirdParty/glfw/docs/CODEOWNERS

@@ -0,0 +1,10 @@
+
+*               @elmindreda
+
+src/wl_*        @linkmauve
+
+docs/*.css      @glfw/webdev
+docs/*.scss     @glfw/webdev
+docs/*.html     @glfw/webdev
+docs/*.xml      @glfw/webdev
+

src/ThirdParty/glfw/docs/CONTRIBUTING.md

@@ -0,0 +1,391 @@
+# Contribution Guide
+
+## Contents
+
+- [Asking a question](#asking-a-question)
+- [Reporting a bug](#reporting-a-bug)
+    - [Reporting a compile or link bug](#reporting-a-compile-or-link-bug)
+    - [Reporting a segfault or other crash bug](#reporting-a-segfault-or-other-crash-bug)
+    - [Reporting a context creation bug](#reporting-a-context-creation-bug)
+    - [Reporting a monitor or video mode bug](#reporting-a-monitor-or-video-mode-bug)
+    - [Reporting a window, input or event bug](#reporting-a-window-input-or-event-bug)
+    - [Reporting some other library bug](#reporting-some-other-library-bug)
+    - [Reporting a documentation bug](#reporting-a-documentation-bug)
+    - [Reporting a website bug](#reporting-a-website-bug)
+- [Requesting a feature](#requesting-a-feature)
+- [Contributing a bug fix](#contributing-a-bug-fix)
+- [Contributing a feature](#contributing-a-feature)
+
+
+## Asking a question
+
+Questions about how to use GLFW should be asked either in the [support
+section](https://discourse.glfw.org/c/support) of the forum, under the [Stack
+Overflow tag](https://stackoverflow.com/questions/tagged/glfw) or [Game
+Development tag](https://gamedev.stackexchange.com/questions/tagged/glfw) on
+Stack Exchange or in the IRC channel `#glfw` on
+[Libera.Chat](https://libera.chat/).
+
+Questions about the design or implementation of GLFW or about future plans
+should be asked in the [dev section](https://discourse.glfw.org/c/dev) of the
+forum or in the IRC channel.  Please don't open a GitHub issue to discuss design
+questions without first checking with a maintainer.
+
+
+## Reporting a bug
+
+If GLFW is behaving unexpectedly at run-time, start by setting an [error
+callback](https://www.glfw.org/docs/latest/intro_guide.html#error_handling).
+GLFW will often tell you the cause of an error via this callback.  If it
+doesn't, that might be a separate bug.
+
+If GLFW is crashing or triggering asserts, make sure that all your object
+handles and other pointers are valid.
+
+For bugs where it makes sense, a short, self contained example is absolutely
+invaluable.  Just put it inline in the body text.  Note that if the bug is
+reproducible with one of the test programs that come with GLFW, just mention
+that instead.
+
+__Don't worry about adding too much information__.  Unimportant information can
+be abbreviated or removed later, but missing information can stall bug fixing,
+especially when your schedule doesn't align with that of the maintainer.
+
+__Please provide text as text, not as images__.  This includes code, error
+messages and any other text.  Text in images cannot be found by other users
+searching for the same problem and may have to be re-typed by maintainers when
+debugging.
+
+You don't need to manually indent your code or other text to quote it with
+GitHub Markdown; just surround it with triple backticks:
+
+    ```
+    Some quoted text.
+    ```
+
+You can also add syntax highlighting by appending the common file extension:
+
+    ```c
+    int five(void)
+    {
+        return 5;
+    }
+    ```
+
+There are issue labels for both platforms and GPU manufacturers, so there is no
+need to mention these in the subject line.  If you do, it will be removed when
+the issue is labeled.
+
+If your bug is already reported, please add any new information you have, or if
+it already has everything, give it a :+1:.
+
+
+### Reporting a compile or link bug
+
+__Note:__ GLFW needs many system APIs to do its job, which on some platforms
+means linking to many system libraries.  If you are using GLFW as a static
+library, that means your application needs to link to these in addition to GLFW.
+
+__Note:__ Check the [Compiling
+GLFW](https://www.glfw.org/docs/latest/compile.html) guide and or [Building
+applications](https://www.glfw.org/docs/latest/build.html) guide for before
+opening an issue of this kind.  Most issues are caused by a missing package or
+linker flag.
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`) and the __compiler name and version__ (e.g. `Visual
+C++ 2015 Update 2`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+Please also include the __complete build log__ from your compiler and linker,
+even if it's long.  It can always be shortened later, if necessary.
+
+
+#### Quick template
+
+```
+OS and version:
+Compiler version:
+Release or commit:
+Build log:
+```
+
+
+### Reporting a segfault or other crash bug
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+Please also include any __error messages__ provided to your application via the
+[error
+callback](https://www.glfw.org/docs/latest/intro_guide.html#error_handling) and
+the __full call stack__ of the crash, or if the crash does not occur in debug
+mode, mention that instead.
+
+
+#### Quick template
+
+```
+OS and version:
+Release or commit:
+Error messages:
+Call stack:
+```
+
+
+### Reporting a context creation bug
+
+__Note:__ Windows ships with graphics drivers that do not support OpenGL.  If
+GLFW says that your machine lacks support for OpenGL, it very likely does.
+Install drivers from the computer manufacturer or graphics card manufacturer
+([Nvidia](https://www.geforce.com/drivers),
+[AMD](https://www.amd.com/en/support),
+[Intel](https://www-ssl.intel.com/content/www/us/en/support/detect.html)) to
+fix this.
+
+__Note:__ AMD only supports OpenGL ES on Windows via EGL.  See the
+[GLFW\_CONTEXT\_CREATION\_API](https://www.glfw.org/docs/latest/window_guide.html#window_hints_ctx)
+hint for how to select EGL.
+
+Please verify that context creation also fails with the `glfwinfo` tool before
+reporting it as a bug.  This tool is included in the GLFW source tree as
+`tests/glfwinfo.c` and is built along with the library.  It has switches for all
+GLFW context and framebuffer hints.  Run `glfwinfo -h` for a complete list.
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+If you are running your program in a virtual machine, please mention this and
+include the __VM name and version__ (e.g. `VirtualBox 5.1`).
+
+Please also include the __GLFW version string__ (`3.2.0 X11 EGL clock_gettime
+/dev/js`), as described
+[here](https://www.glfw.org/docs/latest/intro.html#intro_version_string), the
+__GPU model and driver version__ (e.g. `GeForce GTX660 with 352.79`), and the
+__output of `glfwinfo`__ (with switches matching any hints you set in your
+code) when reporting this kind of bug.  If this tool doesn't run on the machine,
+mention that instead.
+
+
+#### Quick template
+
+```
+OS and version:
+GPU and driver:
+Release or commit:
+Version string:
+glfwinfo output:
+```
+
+
+### Reporting a monitor or video mode bug
+
+__Note:__ On headless systems on some platforms, no monitors are reported.  This
+causes glfwGetPrimaryMonitor to return `NULL`, which not all applications are
+prepared for.
+
+__Note:__ Some third-party tools report more video modes than are approved of
+by the OS.  For safety and compatibility, GLFW only reports video modes the OS
+wants programs to use.  This is not a bug.
+
+The `monitors` tool is included in the GLFW source tree as `tests/monitors.c`
+and is built along with the library.  It lists all information GLFW provides
+about monitors it detects.
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+If you are running your program in a virtual machine, please mention this and
+include the __VM name and version__ (e.g. `VirtualBox 5.1`).
+
+Please also include any __error messages__ provided to your application via the
+[error
+callback](https://www.glfw.org/docs/latest/intro_guide.html#error_handling) and
+the __output of `monitors`__ when reporting this kind of bug.  If this tool
+doesn't run on the machine, mention this instead.
+
+
+#### Quick template
+
+```
+OS and version:
+Release or commit:
+Error messages:
+monitors output:
+```
+
+
+### Reporting a window, input or event bug
+
+__Note:__ The exact ordering of related window events will sometimes differ.
+
+__Note:__ Window moving and resizing (by the user) will block the main thread on
+some platforms.  This is not a bug.  Set a [refresh
+callback](https://www.glfw.org/docs/latest/window.html#window_refresh) if you
+want to keep the window contents updated during a move or size operation.
+
+The `events` tool is included in the GLFW source tree as `tests/events.c` and is
+built along with the library.  It prints all information provided to every
+callback supported by GLFW as events occur.  Each event is listed with the time
+and a unique number to make discussions about event logs easier.  The tool has
+command-line options for creating multiple windows and full screen windows.
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+If you are running your program in a virtual machine, please mention this and
+include the __VM name and version__ (e.g. `VirtualBox 5.1`).
+
+Please also include any __error messages__ provided to your application via the
+[error
+callback](https://www.glfw.org/docs/latest/intro_guide.html#error_handling) and
+if relevant, the __output of `events`__ when reporting this kind of bug.  If
+this tool doesn't run on the machine, mention this instead.
+
+__X11:__ If possible, please include what desktop environment (e.g. GNOME,
+Unity, KDE) and/or window manager (e.g. Openbox, dwm, Window Maker) you are
+running.  If the bug is related to keyboard input, please include any input
+method (e.g. ibus, SCIM) you are using.
+
+
+#### Quick template
+
+```
+OS and version:
+Release or commit:
+Error messages:
+events output:
+```
+
+
+### Reporting some other library bug
+
+Always include the __operating system name and version__ (e.g. `Windows
+7 64-bit` or `Ubuntu 15.10`).  If you are using an official release of GLFW,
+include the __GLFW release version__ (e.g. `3.1.2`), otherwise include the
+__GLFW commit ID__ (e.g.  `3795d78b14ef06008889cc422a1fb8d642597751`) from Git.
+
+Please also include any __error messages__ provided to your application via the
+[error
+callback](https://www.glfw.org/docs/latest/intro_guide.html#error_handling), if
+relevant.
+
+
+#### Quick template
+
+```
+OS and version:
+Release or commit:
+Error messages:
+```
+
+
+### Reporting a documentation bug
+
+If you found a bug in the documentation, including this file, then it's fine to
+just link to that web page or mention that source file.  You don't need to match
+the source to the output or vice versa.
+
+
+### Reporting a website bug
+
+If the bug is in the documentation (anything under `/docs/`) then please see the
+section above.  Bugs in the rest of the site are reported to the [website
+source repository](https://github.com/glfw/website/issues).
+
+
+## Requesting a feature
+
+Please explain why you need the feature and how you intend to use it.  If you
+have a specific API design in mind, please add that as well.  If you have or are
+planning to write code for the feature, see the section below.
+
+If there already is a request for the feature you need, add your specific use
+case unless it is already mentioned.  If it is, give it a :+1:.
+
+
+## Contributing a bug fix
+
+__Note:__ You must have all necessary [intellectual
+property rights](https://en.wikipedia.org/wiki/Intellectual_property) to any
+code you contribute.  If you did not write the code yourself, you must explain
+where it came from and under what license you received it.  Even code using the
+same license as GLFW may not be copied without attribution.
+
+__There is no preferred patch size__.  A one character fix is just as welcome as
+a thousand line one, if that is the appropriate size for the fix.
+
+In addition to the code, a complete bug fix includes:
+
+- Change log entry in `README.md`, describing the incorrect behavior
+- Credits entries for all authors of the bug fix
+
+Bug fixes will not be rejected because they don't include all the above parts,
+but please keep in mind that maintainer time is finite and that there are many
+other bugs and features to work on.
+
+If the patch fixes a bug introduced after the last release, it should not get
+a change log entry.
+
+If you haven't already, read the excellent article [How to Write a Git Commit
+Message](https://chris.beams.io/posts/git-commit/).
+
+
+## Contributing a feature
+
+__Note:__ You must have all necessary rights to any code you contribute.  If you
+did not write the code yourself, you must explain where it came from and under
+what license.  Even code using the same license as GLFW may not be copied
+without attribution.
+
+__Note:__ If you haven't already implemented the feature, check first if there
+already is an open issue for it and if it's already being developed in an
+[experimental branch](https://github.com/glfw/glfw/branches/all).
+
+__There is no preferred patch size__.  A one character change is just as welcome
+as one adding a thousand line one, if that is the appropriate size for the
+feature.
+
+In addition to the code, a complete feature includes:
+
+- Change log entry in `README.md`, listing all new symbols
+- News page entry, briefly describing the feature
+- Guide documentation, with minimal examples, in the relevant guide
+- Reference documentation, with all applicable tags
+- Cross-references and mentions in appropriate places
+- Credits entries for all authors of the feature
+
+If the feature requires platform-specific code, at minimum stubs must be added
+for the new platform function to all supported and experimental platforms.
+
+If it adds a new callback, support for it must be added to `tests/event.c`.
+
+If it adds a new monitor property, support for it must be added to
+`tests/monitor.c`.
+
+If it adds a new OpenGL, OpenGL ES or Vulkan option or extension, support
+for it must be added to `tests/glfwinfo.c` and the behavior of the library when
+the extension is missing documented in `docs/compat.dox`.
+
+If you haven't already, read the excellent article [How to Write a Git Commit
+Message](https://chris.beams.io/posts/git-commit/).
+
+Features will not be rejected because they don't include all the above parts,
+but please keep in mind that maintainer time is finite and that there are many
+other features and bugs to work on.
+
+Please also keep in mind that any part of the public API that has been included
+in a release cannot be changed until the next _major_ version.  Features can be
+added and existing parts can sometimes be overloaded (in the general sense of
+doing more things, not in the C++ sense), but code written to the API of one
+minor release should both compile and run on subsequent minor releases.
+

src/ThirdParty/glfw/docs/DoxygenLayout.xml

@@ -0,0 +1,71 @@
+<doxygenlayout version="1.0">
+  <!-- Generated by doxygen 1.8.14 -->
+  <!-- Navigation index tabs for HTML output -->
+  <navindex>
+    <tab type="mainpage" visible="yes" title="Introduction"/>
+    <tab type="user" url="quick_guide.html" title="Tutorial"/>
+    <tab type="pages" visible="yes" title="Guides" intro=""/>
+    <tab type="modules" visible="yes" title="Reference" intro=""/>
+    <tab type="filelist" visible="yes" title="Files"/>
+  </navindex>
+
+  <!-- Layout definition for a file page -->
+  <file>
+    <detaileddescription title="Description"/>
+    <includes visible="$SHOW_INCLUDE_FILES"/>
+    <sourcelink visible="yes"/>
+    <memberdecl>
+      <constantgroups visible="yes" title=""/>
+      <defines title=""/>
+      <typedefs title=""/>
+      <enums title=""/>
+      <functions title=""/>
+      <variables title=""/>
+      <membergroups visible="yes"/>
+    </memberdecl>
+    <memberdef>
+      <defines title=""/>
+      <typedefs title=""/>
+      <enums title=""/>
+      <functions title=""/>
+      <variables title=""/>
+    </memberdef>
+    <authorsection/>
+  </file>
+
+  <!-- Layout definition for a group page -->
+  <group>
+    <detaileddescription title="Description"/>
+    <memberdecl>
+      <nestedgroups visible="yes" title=""/>
+      <dirs visible="yes" title=""/>
+      <files visible="yes" title=""/>
+      <defines title=""/>
+      <typedefs title=""/>
+      <enums title=""/>
+      <enumvalues title=""/>
+      <functions title=""/>
+      <variables title=""/>
+    </memberdecl>
+    <memberdef>
+      <pagedocs/>
+      <defines title=""/>
+      <typedefs title=""/>
+      <enums title=""/>
+      <enumvalues title=""/>
+      <functions title=""/>
+      <variables title=""/>
+    </memberdef>
+    <authorsection visible="yes"/>
+  </group>
+
+  <!-- Layout definition for a directory page -->
+  <directory>
+    <briefdescription visible="yes"/>
+    <memberdecl>
+      <dirs visible="yes"/>
+      <files visible="yes"/>
+    </memberdecl>
+    <detaileddescription title=""/>
+  </directory>
+</doxygenlayout>

src/ThirdParty/glfw/docs/SUPPORT.md

@@ -0,0 +1,14 @@
+# Support resources
+
+See the [latest documentation](https://www.glfw.org/docs/latest/) for tutorials,
+guides and the API reference.
+
+If you have questions about using GLFW, we have a
+[forum](https://discourse.glfw.org/), and the `#glfw` IRC channel on
+[Libera.Chat](https://libera.chat/).
+
+Bugs are reported to our [issue tracker](https://github.com/glfw/glfw/issues).
+Please check the [contribution
+guide](https://github.com/glfw/glfw/blob/master/docs/CONTRIBUTING.md) for
+information on what to include when reporting a bug.
+

src/ThirdParty/glfw/docs/build.dox

@@ -0,0 +1,338 @@
+/*!
+
+@page build_guide Building applications
+
+@tableofcontents
+
+This is about compiling and linking applications that use GLFW.  For information on
+how to write such applications, start with the
+[introductory tutorial](@ref quick_guide).  For information on how to compile
+the GLFW library itself, see @ref compile_guide.
+
+This is not a tutorial on compilation or linking.  It assumes basic
+understanding of how to compile and link a C program as well as how to use the
+specific compiler of your chosen development environment.  The compilation
+and linking process should be explained in your C programming material and in
+the documentation for your development environment.
+
+
+@section build_include Including the GLFW header file
+
+You should include the GLFW header in the source files where you use OpenGL or
+GLFW.
+
+@code
+#include <GLFW/glfw3.h>
+@endcode
+
+This header defines all the constants and declares all the types and function
+prototypes of the GLFW API.  By default it also includes the OpenGL header from
+your development environment.  See [option macros](@ref build_macros) below for
+how to select OpenGL ES headers and more.
+
+The GLFW header also defines any platform-specific macros needed by your OpenGL
+header, so that it can be included without needing any window system headers.
+
+It does this only when needed, so if window system headers are included, the
+GLFW header does not try to redefine those symbols.  The reverse is not true,
+i.e. `windows.h` cannot cope if any Win32 symbols have already been defined.
+
+In other words:
+
+ - Use the GLFW header to include OpenGL or OpenGL ES headers portably
+ - Do not include window system headers unless you will use those APIs directly
+ - If you do need such headers, include them before the GLFW header
+
+If you are using an OpenGL extension loading library such as
+[glad](https://github.com/Dav1dde/glad), the extension loader header should
+be included before the GLFW one.  GLFW attempts to detect any OpenGL or OpenGL
+ES header or extension loader header included before it and will then disable
+the inclusion of the default OpenGL header.  Most extension loaders also define
+macros that disable similar headers below it.
+
+@code
+#include <glad/gl.h>
+#include <GLFW/glfw3.h>
+@endcode
+
+Both of these mechanisms depend on the extension loader header defining a known
+macro.  If yours doesn't or you don't know which one your users will pick, the
+@ref GLFW_INCLUDE_NONE macro will explicitly to prevent the GLFW header from
+including the OpenGL header.  This will also allow you to include the two
+headers in any order.
+
+@code
+#define GLFW_INCLUDE_NONE
+#include <GLFW/glfw3.h>
+#include <glad/gl.h>
+@endcode
+
+
+@subsection build_macros GLFW header option macros
+
+These macros may be defined before the inclusion of the GLFW header and affect
+its behavior.
+
+@anchor GLFW_DLL
+__GLFW_DLL__ is required on Windows when using the GLFW DLL, to tell the
+compiler that the GLFW functions are defined in a DLL.
+
+The following macros control which OpenGL or OpenGL ES API header is included.
+Only one of these may be defined at a time.
+
+@note GLFW does not provide any of the API headers mentioned below.  They are
+provided by your development environment or your OpenGL, OpenGL ES or Vulkan
+SDK, and most of them can be downloaded from the
+[Khronos Registry](https://www.khronos.org/registry/).
+
+@anchor GLFW_INCLUDE_GLCOREARB
+__GLFW_INCLUDE_GLCOREARB__ makes the GLFW header include the modern
+`GL/glcorearb.h` header (`OpenGL/gl3.h` on macOS) instead of the regular OpenGL
+header.
+
+@anchor GLFW_INCLUDE_ES1
+__GLFW_INCLUDE_ES1__ makes the GLFW header include the OpenGL ES 1.x `GLES/gl.h`
+header instead of the regular OpenGL header.
+
+@anchor GLFW_INCLUDE_ES2
+__GLFW_INCLUDE_ES2__ makes the GLFW header include the OpenGL ES 2.0
+`GLES2/gl2.h` header instead of the regular OpenGL header.
+
+@anchor GLFW_INCLUDE_ES3
+__GLFW_INCLUDE_ES3__ makes the GLFW header include the OpenGL ES 3.0
+`GLES3/gl3.h` header instead of the regular OpenGL header.
+
+@anchor GLFW_INCLUDE_ES31
+__GLFW_INCLUDE_ES31__ makes the GLFW header include the OpenGL ES 3.1
+`GLES3/gl31.h` header instead of the regular OpenGL header.
+
+@anchor GLFW_INCLUDE_ES32
+__GLFW_INCLUDE_ES32__ makes the GLFW header include the OpenGL ES 3.2
+`GLES3/gl32.h` header instead of the regular OpenGL header.
+
+@anchor GLFW_INCLUDE_NONE
+__GLFW_INCLUDE_NONE__ makes the GLFW header not include any OpenGL or OpenGL ES
+API header.  This is useful in combination with an extension loading library.
+
+If none of the above inclusion macros are defined, the standard OpenGL `GL/gl.h`
+header (`OpenGL/gl.h` on macOS) is included, unless GLFW detects the inclusion
+guards of any OpenGL, OpenGL ES or extension loader header it knows about.
+
+The following macros control the inclusion of additional API headers.  Any
+number of these may be defined simultaneously, and/or together with one of the
+above macros.
+
+@anchor GLFW_INCLUDE_VULKAN
+__GLFW_INCLUDE_VULKAN__ makes the GLFW header include the Vulkan
+`vulkan/vulkan.h` header in addition to any selected OpenGL or OpenGL ES header.
+
+@anchor GLFW_INCLUDE_GLEXT
+__GLFW_INCLUDE_GLEXT__ makes the GLFW header include the appropriate extension
+header for the OpenGL or OpenGL ES header selected above after and in addition
+to that header.
+
+@anchor GLFW_INCLUDE_GLU
+__GLFW_INCLUDE_GLU__ makes the header include the GLU header in addition to the
+header selected above.  This should only be used with the standard OpenGL header
+and only for compatibility with legacy code.  GLU has been deprecated and should
+not be used in new code.
+
+@note None of these macros may be defined during the compilation of GLFW itself.
+If your build includes GLFW and you define any these in your build files, make
+sure they are not applied to the GLFW sources.
+
+
+@section build_link Link with the right libraries
+
+GLFW is essentially a wrapper of various platform-specific APIs and therefore
+needs to link against many different system libraries.  If you are using GLFW as
+a shared library / dynamic library / DLL then it takes care of these links.
+However, if you are using GLFW as a static library then your executable will
+need to link against these libraries.
+
+On Windows and macOS, the list of system libraries is static and can be
+hard-coded into your build environment.  See the section for your development
+environment below.  On Linux and other Unix-like operating systems, the list
+varies but can be retrieved in various ways as described below.
+
+A good general introduction to linking is
+[Beginner's Guide to Linkers](https://www.lurklurk.org/linkers/linkers.html) by
+David Drysdale.
+
+
+@subsection build_link_win32 With MinGW or Visual C++ on Windows
+
+The static version of the GLFW library is named `glfw3`.  When using this
+version, it is also necessary to link with some libraries that GLFW uses.
+
+When using MinGW to link an application with the static version of GLFW, you
+must also explicitly link with `gdi32`. Other toolchains including MinGW-w64
+include it in the set of default libraries along with other dependencies like
+`user32` and `kernel32`.
+
+The link library for the GLFW DLL is named `glfw3dll`.  When compiling an
+application that uses the DLL version of GLFW, you need to define the @ref
+GLFW_DLL macro _before_ any inclusion of the GLFW header.  This can be done
+either with a compiler switch or by defining it in your source code.
+
+
+@subsection build_link_cmake_source With CMake and GLFW source
+
+This section is about using CMake to compile and link GLFW along with your
+application.  If you want to use an installed binary instead, see @ref
+build_link_cmake_package.
+
+With a few changes to your `CMakeLists.txt` you can have the GLFW source tree
+built along with your application.
+
+Add the root directory of the GLFW source tree to your project.  This will add
+the `glfw` target to your project.
+
+@code{.cmake}
+add_subdirectory(path/to/glfw)
+@endcode
+
+Once GLFW has been added, link your application against the `glfw` target.
+This adds the GLFW library and its link-time dependencies as it is currently
+configured, the include directory for the GLFW header and, when applicable, the
+@ref GLFW_DLL macro.
+
+@code{.cmake}
+target_link_libraries(myapp glfw)
+@endcode
+
+Note that the `glfw` target does not depend on OpenGL, as GLFW loads any OpenGL,
+OpenGL ES or Vulkan libraries it needs at runtime.  If your application calls
+OpenGL directly, instead of using a modern
+[extension loader library](@ref context_glext_auto), use the OpenGL CMake
+package.
+
+@code{.cmake}
+find_package(OpenGL REQUIRED)
+@endcode
+
+If OpenGL is found, the `OpenGL::GL` target is added to your project, containing
+library and include directory paths.  Link against this like any other library.
+
+@code{.cmake}
+target_link_libraries(myapp OpenGL::GL)
+@endcode
+
+For a minimal example of a program and GLFW sources built with CMake, see the
+[GLFW CMake Starter](https://github.com/juliettef/GLFW-CMake-starter) on GitHub.
+
+
+@subsection build_link_cmake_package With CMake and installed GLFW binaries
+
+This section is about using CMake to link GLFW after it has been built and
+installed.  If you want to build it along with your application instead, see
+@ref build_link_cmake_source.
+
+With a few changes to your `CMakeLists.txt` you can locate the package and
+target files generated when GLFW is installed.
+
+@code{.cmake}
+find_package(glfw3 3.4 REQUIRED)
+@endcode
+
+Once GLFW has been added to the project, link against it with the `glfw` target.
+This adds the GLFW library and its link-time dependencies, the include directory
+for the GLFW header and, when applicable, the @ref GLFW_DLL macro.
+
+@code{.cmake}
+target_link_libraries(myapp glfw)
+@endcode
+
+Note that the `glfw` target does not depend on OpenGL, as GLFW loads any OpenGL,
+OpenGL ES or Vulkan libraries it needs at runtime.  If your application calls
+OpenGL directly, instead of using a modern
+[extension loader library](@ref context_glext_auto), use the OpenGL CMake
+package.
+
+@code{.cmake}
+find_package(OpenGL REQUIRED)
+@endcode
+
+If OpenGL is found, the `OpenGL::GL` target is added to your project, containing
+library and include directory paths.  Link against this like any other library.
+
+@code{.cmake}
+target_link_libraries(myapp OpenGL::GL)
+@endcode
+
+
+@subsection build_link_pkgconfig With makefiles and pkg-config on Unix
+
+GLFW supports [pkg-config](https://www.freedesktop.org/wiki/Software/pkg-config/),
+and the `glfw3.pc` pkg-config file is generated when the GLFW library is built
+and is installed along with it.  A pkg-config file describes all necessary
+compile-time and link-time flags and dependencies needed to use a library.  When
+they are updated or if they differ between systems, you will get the correct
+ones automatically.
+
+A typical compile and link command-line when using the static version of the
+GLFW library may look like this:
+
+@code{.sh}
+cc $(pkg-config --cflags glfw3) -o myprog myprog.c $(pkg-config --static --libs glfw3)
+@endcode
+
+If you are using the shared version of the GLFW library, omit the `--static`
+flag.
+
+@code{.sh}
+cc $(pkg-config --cflags glfw3) -o myprog myprog.c $(pkg-config --libs glfw3)
+@endcode
+
+You can also use the `glfw3.pc` file without installing it first, by using the
+`PKG_CONFIG_PATH` environment variable.
+
+@code{.sh}
+env PKG_CONFIG_PATH=path/to/glfw/src cc $(pkg-config --cflags glfw3) -o myprog myprog.c $(pkg-config --libs glfw3)
+@endcode
+
+The dependencies do not include OpenGL, as GLFW loads any OpenGL, OpenGL ES or
+Vulkan libraries it needs at runtime.  If your application calls OpenGL
+directly, instead of using a modern
+[extension loader library](@ref context_glext_auto), you should add the `gl`
+pkg-config package.
+
+@code{.sh}
+cc $(pkg-config --cflags glfw3 gl) -o myprog myprog.c $(pkg-config --libs glfw3 gl)
+@endcode
+
+
+@subsection build_link_xcode With Xcode on macOS
+
+If you are using the dynamic library version of GLFW, add it to the project
+dependencies.
+
+If you are using the static library version of GLFW, add it and the Cocoa,
+OpenGL and IOKit frameworks to the project as dependencies.  They can all be
+found in `/System/Library/Frameworks`.
+
+
+@subsection build_link_osx With command-line on macOS
+
+It is recommended that you use [pkg-config](@ref build_link_pkgconfig) when
+building from the command line on macOS.  That way you will get any new
+dependencies added automatically.  If you still wish to build manually, you need
+to add the required frameworks and libraries to your command-line yourself using
+the `-l` and `-framework` switches.
+
+If you are using the dynamic GLFW library, which is named `libglfw.3.dylib`, do:
+
+@code{.sh}
+cc -o myprog myprog.c -lglfw -framework Cocoa -framework OpenGL -framework IOKit
+@endcode
+
+If you are using the static library, named `libglfw3.a`, substitute `-lglfw3`
+for `-lglfw`.
+
+Note that you do not add the `.framework` extension to a framework when linking
+against it from the command-line.
+
+@note Your machine may have `libGL.*.dylib` style OpenGL library, but that is
+for the X Window System and will not work with the macOS native version of GLFW.
+
+*/

src/ThirdParty/glfw/docs/compat.dox

@@ -0,0 +1,284 @@
+/*!
+
+@page compat_guide Standards conformance
+
+@tableofcontents
+
+This guide describes the various API extensions used by this version of GLFW.
+It lists what are essentially implementation details, but which are nonetheless
+vital knowledge for developers intending to deploy their applications on a wide
+range of machines.
+
+The information in this guide is not a part of GLFW API, but merely
+preconditions for some parts of the library to function on a given machine.  Any
+part of this information may change in future versions of GLFW and that will not
+be considered a breaking API change.
+
+
+@section compat_x11 X11 extensions, protocols and IPC standards
+
+As GLFW uses Xlib directly, without any intervening toolkit
+library, it has sole responsibility for interacting well with the many and
+varied window managers in use on Unix-like systems.  In order for applications
+and window managers to work well together, a number of standards and
+conventions have been developed that regulate behavior outside the scope of the
+X11 API; most importantly the
+[Inter-Client Communication Conventions Manual](https://www.tronche.com/gui/x/icccm/)
+(ICCCM) and
+[Extended Window Manager Hints](https://standards.freedesktop.org/wm-spec/wm-spec-latest.html)
+(EWMH) standards.
+
+GLFW uses the `_MOTIF_WM_HINTS` window property to support borderless windows.
+If the running window manager does not support this property, the
+`GLFW_DECORATED` hint will have no effect.
+
+GLFW uses the ICCCM `WM_DELETE_WINDOW` protocol to intercept the user
+attempting to close the GLFW window.  If the running window manager does not
+support this protocol, the close callback will never be called.
+
+GLFW uses the EWMH `_NET_WM_PING` protocol, allowing the window manager notify
+the user when the application has stopped responding, i.e. when it has ceased to
+process events.  If the running window manager does not support this protocol,
+the user will not be notified if the application locks up.
+
+GLFW uses the EWMH `_NET_WM_STATE_FULLSCREEN` window state to tell the window
+manager to make the GLFW window full screen.  If the running window manager does
+not support this state, full screen windows may not work properly.  GLFW has
+a fallback code path in case this state is unavailable, but every window manager
+behaves slightly differently in this regard.
+
+GLFW uses the EWMH `_NET_WM_BYPASS_COMPOSITOR` window property to tell a
+compositing window manager to un-redirect full screen GLFW windows.  If the
+running window manager uses compositing but does not support this property then
+additional copying may be performed for each buffer swap of full screen windows.
+
+GLFW uses the
+[clipboard manager protocol](https://www.freedesktop.org/wiki/ClipboardManager/)
+to push a clipboard string (i.e. selection) owned by a GLFW window about to be
+destroyed to the clipboard manager.  If there is no running clipboard manager,
+the clipboard string will be unavailable once the window has been destroyed.
+
+GLFW uses the
+[X drag-and-drop protocol](https://www.freedesktop.org/wiki/Specifications/XDND/)
+to provide file drop events.  If the application originating the drag does not
+support this protocol, drag and drop will not work.
+
+GLFW uses the XRandR 1.3 extension to provide multi-monitor support.  If the
+running X server does not support this version of this extension, multi-monitor
+support will not function and only a single, desktop-spanning monitor will be
+reported.
+
+GLFW uses the XRandR 1.3 and Xf86vidmode extensions to provide gamma ramp
+support.  If the running X server does not support either or both of these
+extensions, gamma ramp support will not function.
+
+GLFW uses the Xkb extension and detectable auto-repeat to provide keyboard
+input.  If the running X server does not support this extension, a non-Xkb
+fallback path is used.
+
+GLFW uses the XInput2 extension to provide raw, non-accelerated mouse motion
+when the cursor is disabled.  If the running X server does not support this
+extension, regular accelerated mouse motion will be used.
+
+GLFW uses both the XRender extension and the compositing manager to support
+transparent window framebuffers.  If the running X server does not support this
+extension or there is no running compositing manager, the
+`GLFW_TRANSPARENT_FRAMEBUFFER` framebuffer hint will have no effect.
+
+GLFW uses both the Xcursor extension and the freedesktop cursor conventions to
+provide an expanded set of standard cursor shapes.  If the running X server does
+not support this extension or the current cursor theme does not support the
+conventions, the `GLFW_RESIZE_NWSE_CURSOR`, `GLFW_RESIZE_NESW_CURSOR` and
+`GLFW_NOT_ALLOWED_CURSOR` shapes will not be available and other shapes may use
+legacy images.
+
+
+@section compat_wayland Wayland protocols and IPC standards
+
+As GLFW uses libwayland directly, without any intervening toolkit library, it
+has sole responsibility for interacting well with every compositor in use on
+Unix-like systems.  Most of the features are provided by the core protocol,
+while cursor support is provided by the libwayland-cursor helper library, EGL
+integration by libwayland-egl, and keyboard handling by
+[libxkbcommon](https://xkbcommon.org/).  In addition, GLFW uses some protocols
+from wayland-protocols to provide additional features if the compositor
+supports them.
+
+GLFW uses xkbcommon 0.5.0 to provide key and text input support.  Earlier
+versions are not supported.
+
+GLFW uses the [xdg-shell
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/stable/xdg-shell/xdg-shell.xml)
+to provide better window management.  This protocol is part of
+wayland-protocols 1.12, and is mandatory for GLFW to display a window.
+
+GLFW uses the [relative pointer
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/unstable/relative-pointer/relative-pointer-unstable-v1.xml)
+alongside the [pointer constraints
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml)
+to implement disabled cursor.  These two protocols are part of
+wayland-protocols 1.1, and mandatory at build time.  If the running compositor
+does not support both of these protocols, disabling the cursor will have no
+effect.
+
+GLFW uses the [idle inhibit
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml)
+to prohibit the screensaver from starting.  This protocol is part of
+wayland-protocols 1.6, and mandatory at build time.  If the running compositor
+does not support this protocol, the screensaver may start even for full screen
+windows.
+
+GLFW uses the [xdg-decoration
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/unstable/xdg-decoration/xdg-decoration-unstable-v1.xml)
+to request decorations to be drawn around its windows.  This protocol is part
+of wayland-protocols 1.15, and mandatory at build time.  If the running
+compositor does not support this protocol, a very simple frame will be drawn by
+GLFW itself, using the [viewporter
+protocol](https://cgit.freedesktop.org/wayland/wayland-protocols/tree/stable/viewporter/viewporter.xml)
+alongside
+[subsurfaces](https://cgit.freedesktop.org/wayland/wayland/tree/protocol/wayland.xml#n2598).
+This protocol is part of wayland-protocols 1.4, and mandatory at build time.
+If the running compositor does not support this protocol either, no decorations
+will be drawn around windows.
+
+
+@section compat_glx GLX extensions
+
+The GLX API is the default API used to create OpenGL contexts on Unix-like
+systems using the X Window System.
+
+GLFW uses the GLX 1.3 `GLXFBConfig` functions to enumerate and select framebuffer pixel
+formats.  If GLX 1.3 is not supported, @ref glfwInit will fail.
+
+GLFW uses the `GLX_MESA_swap_control,` `GLX_EXT_swap_control` and
+`GLX_SGI_swap_control` extensions to provide vertical retrace synchronization
+(or _vsync_), in that order of preference.  Where none of these extension are
+available, calling @ref glfwSwapInterval will have no effect.
+
+GLFW uses the `GLX_ARB_multisample` extension to create contexts with
+multisampling anti-aliasing.  Where this extension is unavailable, the
+`GLFW_SAMPLES` hint will have no effect.
+
+GLFW uses the `GLX_ARB_create_context` extension when available, even when
+creating OpenGL contexts of version 2.1 and below.  Where this extension is
+unavailable, the `GLFW_CONTEXT_VERSION_MAJOR` and `GLFW_CONTEXT_VERSION_MINOR`
+hints will only be partially supported, the `GLFW_CONTEXT_DEBUG` hint will have
+no effect, and setting the `GLFW_OPENGL_PROFILE` or `GLFW_OPENGL_FORWARD_COMPAT`
+hints to `GLFW_TRUE` will cause @ref glfwCreateWindow to fail.
+
+GLFW uses the `GLX_ARB_create_context_profile` extension to provide support for
+context profiles.  Where this extension is unavailable, setting the
+`GLFW_OPENGL_PROFILE` hint to anything but `GLFW_OPENGL_ANY_PROFILE`, or setting
+`GLFW_CLIENT_API` to anything but `GLFW_OPENGL_API` or `GLFW_NO_API` will cause
+@ref glfwCreateWindow to fail.
+
+GLFW uses the `GLX_ARB_context_flush_control` extension to provide control over
+whether a context is flushed when it is released (made non-current).  Where this
+extension is unavailable, the `GLFW_CONTEXT_RELEASE_BEHAVIOR` hint will have no
+effect and the context will always be flushed when released.
+
+GLFW uses the `GLX_ARB_framebuffer_sRGB` and `GLX_EXT_framebuffer_sRGB`
+extensions to provide support for sRGB framebuffers.  Where both of these
+extensions are unavailable, the `GLFW_SRGB_CAPABLE` hint will have no effect.
+
+
+@section compat_wgl WGL extensions
+
+The WGL API is used to create OpenGL contexts on Microsoft Windows and other
+implementations of the Win32 API, such as Wine.
+
+GLFW uses either the `WGL_EXT_extension_string` or the
+`WGL_ARB_extension_string` extension to check for the presence of all other WGL
+extensions listed below.  If both are available, the EXT one is preferred.  If
+neither is available, no other extensions are used and many GLFW features
+related to context creation will have no effect or cause errors when used.
+
+GLFW uses the `WGL_EXT_swap_control` extension to provide vertical retrace
+synchronization (or _vsync_).  Where this extension is unavailable, calling @ref
+glfwSwapInterval will have no effect.
+
+GLFW uses the `WGL_ARB_pixel_format` and `WGL_ARB_multisample` extensions to
+create contexts with multisampling anti-aliasing.  Where these extensions are
+unavailable, the `GLFW_SAMPLES` hint will have no effect.
+
+GLFW uses the `WGL_ARB_create_context` extension when available, even when
+creating OpenGL contexts of version 2.1 and below.  Where this extension is
+unavailable, the `GLFW_CONTEXT_VERSION_MAJOR` and `GLFW_CONTEXT_VERSION_MINOR`
+hints will only be partially supported, the `GLFW_CONTEXT_DEBUG` hint will have
+no effect, and setting the `GLFW_OPENGL_PROFILE` or `GLFW_OPENGL_FORWARD_COMPAT`
+hints to `GLFW_TRUE` will cause @ref glfwCreateWindow to fail.
+
+GLFW uses the `WGL_ARB_create_context_profile` extension to provide support for
+context profiles.  Where this extension is unavailable, setting the
+`GLFW_OPENGL_PROFILE` hint to anything but `GLFW_OPENGL_ANY_PROFILE` will cause
+@ref glfwCreateWindow to fail.
+
+GLFW uses the `WGL_ARB_context_flush_control` extension to provide control over
+whether a context is flushed when it is released (made non-current).  Where this
+extension is unavailable, the `GLFW_CONTEXT_RELEASE_BEHAVIOR` hint will have no
+effect and the context will always be flushed when released.
+
+GLFW uses the `WGL_ARB_framebuffer_sRGB` and `WGL_EXT_framebuffer_sRGB`
+extensions to provide support for sRGB framebuffers.  Where both of these
+extension are unavailable, the `GLFW_SRGB_CAPABLE` hint will have no effect.
+
+
+@section compat_osx OpenGL on macOS
+
+Support for OpenGL 3.2 and above was introduced with OS X 10.7 and even then
+only forward-compatible, core profile contexts are supported.  Support for
+OpenGL 4.1 was introduced with OS X 10.9, also limited to forward-compatible,
+core profile contexts.  There is also still no mechanism for requesting debug
+contexts or no-error contexts.  Versions of Mac OS X earlier than 10.7 support
+at most OpenGL version 2.1.
+
+Because of this, on OS X 10.7 and later, the `GLFW_CONTEXT_VERSION_MAJOR` and
+`GLFW_CONTEXT_VERSION_MINOR` hints will cause @ref glfwCreateWindow to fail if
+given version 3.0 or 3.1.  The `GLFW_OPENGL_PROFILE` hint must be set to
+`GLFW_OPENGL_CORE_PROFILE` when creating OpenGL 3.2 and later contexts.  The
+`GLFW_CONTEXT_DEBUG` and `GLFW_CONTEXT_NO_ERROR` hints are ignored.
+
+Also, on Mac OS X 10.6 and below, the `GLFW_CONTEXT_VERSION_MAJOR` and
+`GLFW_CONTEXT_VERSION_MINOR` hints will fail if given a version above 2.1,
+setting the `GLFW_OPENGL_PROFILE` or `GLFW_OPENGL_FORWARD_COMPAT` hints to
+a non-default value will cause @ref glfwCreateWindow to fail and the
+`GLFW_CONTEXT_DEBUG` hint is ignored.
+
+
+@section compat_vulkan Vulkan loader and API
+
+By default, GLFW uses the standard system-wide Vulkan loader to access the
+Vulkan API on all platforms except macOS.  This is installed by both graphics
+drivers and Vulkan SDKs.  If either the loader or at least one minimally
+functional ICD is missing, @ref glfwVulkanSupported will return `GLFW_FALSE` and
+all other Vulkan-related functions will fail with an @ref GLFW_API_UNAVAILABLE
+error.
+
+
+@section compat_wsi Vulkan WSI extensions
+
+The Vulkan WSI extensions are used to create Vulkan surfaces for GLFW windows on
+all supported platforms.
+
+GLFW uses the `VK_KHR_surface` and `VK_KHR_win32_surface` extensions to create
+surfaces on Microsoft Windows.  If any of these extensions are not available,
+@ref glfwGetRequiredInstanceExtensions will return an empty list and window
+surface creation will fail.
+
+GLFW uses the `VK_KHR_surface` and either the `VK_MVK_macos_surface` or
+`VK_EXT_metal_surface` extensions to create surfaces on macOS.  If any of these
+extensions are not available, @ref glfwGetRequiredInstanceExtensions will
+return an empty list and window surface creation will fail.
+
+GLFW uses the `VK_KHR_surface` and either the `VK_KHR_xlib_surface` or
+`VK_KHR_xcb_surface` extensions to create surfaces on X11.  If `VK_KHR_surface`
+or both `VK_KHR_xlib_surface` and `VK_KHR_xcb_surface` are not available, @ref
+glfwGetRequiredInstanceExtensions will return an empty list and window surface
+creation will fail.
+
+GLFW uses the `VK_KHR_surface` and `VK_KHR_wayland_surface` extensions to create
+surfaces on Wayland.  If any of these extensions are not available, @ref
+glfwGetRequiredInstanceExtensions will return an empty list and window surface
+creation will fail.
+
+*/

src/ThirdParty/glfw/docs/compile.dox

@@ -0,0 +1,392 @@
+/*!
+
+@page compile_guide Compiling GLFW
+
+@tableofcontents
+
+This is about compiling the GLFW library itself.  For information on how to
+build applications that use GLFW, see @ref build_guide.
+
+
+@section compile_cmake Using CMake
+
+GLFW behaves like most other libraries that use CMake so this guide mostly
+describes the standard configure, generate and compile sequence.  If you are already
+familiar with this from other projects, you may want to focus on the @ref
+compile_deps and @ref compile_options sections for GLFW-specific information.
+
+GLFW uses [CMake](https://cmake.org/) to generate project files or makefiles
+for your chosen development environment.  To compile GLFW, first generate these
+files with CMake and then use them to compile the GLFW library. 
+
+If you are on Windows and macOS you can
+[download CMake](https://cmake.org/download/) from their site.
+
+If you are on a Unix-like system such as Linux, FreeBSD or Cygwin or have
+a package system like Fink, MacPorts or Homebrew, you can install its CMake
+package.
+
+CMake is a complex tool and this guide will only show a few of the possible ways
+to set up and compile GLFW.  The CMake project has their own much more detailed
+[CMake user guide](https://cmake.org/cmake/help/latest/guide/user-interaction/)
+that includes everything in this guide not specific to GLFW.  It may be a useful
+companion to this one.
+
+
+@subsection compile_deps Installing dependencies
+
+The C/C++ development environments in Visual Studio, Xcode and MinGW come with
+all necessary dependencies for compiling GLFW, but on Unix-like systems like
+Linux and FreeBSD you will need a few extra packages.
+
+
+@subsubsection compile_deps_x11 Dependencies for X11
+
+To compile GLFW for X11, you need to have the X11 development packages
+installed.  They are not needed to build or run programs that use GLFW.
+
+On Debian and derivates like Ubuntu and Linux Mint the `xorg-dev` meta-package
+pulls in the development packages for all of X11.
+
+@code{.sh}
+sudo apt install xorg-dev
+@endcode
+
+On Fedora and derivatives like Red Hat the X11 extension packages
+`libXcursor-devel`, `libXi-devel`, `libXinerama-devel` and `libXrandr-devel`
+required by GLFW pull in all its other dependencies.
+
+@code{.sh}
+sudo dnf install libXcursor-devel libXi-devel libXinerama-devel libXrandr-devel
+@endcode
+
+On FreeBSD the X11 headers are installed along the end-user X11 packages, so if
+you have an X server running you should have the headers as well.  If not,
+install the `xorgproto` package.
+
+@code{.sh}
+pkg install xorgproto
+@endcode
+
+On Cygwin the `xorgproto` package in the Devel section of the GUI installer will
+install the headers and other development related files for all of X11.
+
+Once you have the required dependencies, move on to @ref compile_generate.
+
+
+@subsubsection compile_deps_wayland Dependencies for Wayland and X11
+
+To compile GLFW for both Wayland and X11, you need to have the X11, Wayland and xkbcommon
+development packages installed.  They are not needed to build or run programs that use
+GLFW.  You will also need to set the @ref GLFW_BUILD_WAYLAND CMake option in the next
+step when generating build files.
+
+On Debian and derivates like Ubuntu and Linux Mint you will need the `libwayland-dev`,
+`libxkbcommon-dev` and `wayland-protocols` packages and the `xorg-dev` meta-package.
+These will pull in all other dependencies.
+
+@code{.sh}
+sudo apt install libwayland-dev libxkbcommon-dev wayland-protocols xorg-dev
+@endcode
+
+On Fedora and derivatives like Red Hat you will need the `wayland-devel`,
+`libxkbcommon-devel`, `wayland-protocols-devel`, `libXcursor-devel`, `libXi-devel`,
+`libXinerama-devel` and `libXrandr-devel` packages.  These will pull in all other
+dependencies.
+
+@code{.sh}
+sudo dnf install wayland-devel libxkbcommon-devel wayland-protocols-devel libXcursor-devel libXi-devel libXinerama-devel libXrandr-devel
+@endcode
+
+On FreeBSD you will need the `wayland`, `libxkbcommon` and `wayland-protocols` packages.
+The X11 headers are installed along the end-user X11 packages, so if you have an X server
+running you should have the headers as well.  If not, install the `xorgproto` package.
+
+@code{.sh}
+pkg install wayland libxkbcommon wayland-protocols xorgproto
+@endcode
+
+Once you have the required dependencies, move on to @ref compile_generate.
+
+
+@subsection compile_generate Generating build files with CMake
+
+Once you have all necessary dependencies it is time to generate the project
+files or makefiles for your development environment.  CMake needs two paths for
+this:
+
+ - the path to the root directory of the GLFW source tree (not its `src`
+   subdirectory)
+ - the path to the directory where the generated build files and compiled
+   binaries will be placed
+
+If these are the same, it is called an in-tree build, otherwise it is called an
+out-of-tree build.
+
+Out-of-tree builds are recommended as they avoid cluttering up the source tree.
+They also allow you to have several build directories for different
+configurations all using the same source tree.
+
+A common pattern when building a single configuration is to have a build
+directory named `build` in the root of the source tree.
+
+
+@subsubsection compile_generate_gui Generating with the CMake GUI
+
+Start the CMake GUI and set the paths to the source and build directories
+described above.  Then press _Configure_ and _Generate_.
+
+If you wish change any CMake variables in the list, press _Configure_ and then
+_Generate_ to have the new values take effect.  The variable list will be
+populated after the first configure step.
+
+By default GLFW will use X11 on Linux and other Unix-like systems other than macOS.  To
+include support for Wayland as well, set the @ref GLFW_BUILD_WAYLAND option in the GLFW
+section of the variable list, then apply the new value as described above.
+
+Once you have generated the project files or makefiles for your chosen
+development environment, move on to @ref compile_compile.
+
+
+@subsubsection compile_generate_cli Generating with command-line CMake
+
+To make a build directory, pass the source and build directories to the `cmake`
+command.  These can be relative or absolute paths.  The build directory is
+created if it doesn't already exist.
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build
+@endcode
+
+It is common to name the build directory `build` and place it in the root of the
+source tree when only planning to build a single configuration.
+
+@code{.sh}
+cd path/to/glfw
+cmake -S . -B build
+@endcode
+
+Without other flags these will generate Visual Studio project files on Windows
+and makefiles on other platforms.  You can choose other targets using the `-G`
+flag.
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build -G Xcode
+@endcode
+
+By default GLFW will use X11 on Linux and other Unix-like systems other
+than macOS.  To also include support for Wayland, set the @ref GLFW_BUILD_WAYLAND CMake
+option.
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build -D GLFW_BUILD_WAYLAND=1
+@endcode
+
+Once you have generated the project files or makefiles for your chosen
+development environment, move on to @ref compile_compile.
+
+
+@subsection compile_compile Compiling the library
+
+You should now have all required dependencies and the project files or makefiles
+necessary to compile GLFW.  Go ahead and compile the actual GLFW library with
+these files as you would with any other project.
+
+With Visual Studio open `GLFW.sln` and use the Build menu.  With Xcode open
+`GLFW.xcodeproj` and use the Project menu.
+
+With Linux, macOS and other forms of Unix, run `make`.
+
+@code{.sh}
+cd path/to/build
+make
+@endcode
+
+With MinGW, it is `mingw32-make`.
+
+@code{.sh}
+cd path/to/build
+mingw32-make
+@endcode
+
+Any CMake build directory can also be built with the `cmake` command and the
+`--build` flag.
+
+@code{.sh}
+cmake --build path/to/build
+@endcode
+
+This will run the platform specific build tool the directory was generated for.
+
+Once the GLFW library is compiled you are ready to build your application,
+linking it to the GLFW library.  See @ref build_guide for more information.
+
+
+@section compile_options CMake options
+
+The CMake files for GLFW provide a number of options, although not all are
+available on all supported platforms.  Some of these are de facto standards
+among projects using CMake and so have no `GLFW_` prefix.
+
+If you are using the GUI version of CMake, these are listed and can be changed
+from there.  If you are using the command-line version of CMake you can use the
+`ccmake` ncurses GUI to set options.  Some package systems like Ubuntu and other
+distributions based on Debian GNU/Linux have this tool in a separate
+`cmake-curses-gui` package.
+
+Finally, if you don't want to use any GUI, you can set options from the `cmake`
+command-line with the `-D` flag.
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build -D BUILD_SHARED_LIBS=ON
+@endcode
+
+
+@subsection compile_options_shared Shared CMake options
+
+@anchor BUILD_SHARED_LIBS
+__BUILD_SHARED_LIBS__ determines whether GLFW is built as a static library or as
+a DLL / shared library / dynamic library.  This is disabled by default,
+producing a static GLFW library.  This variable has no `GLFW_` prefix because it
+is defined by CMake.  If you want to change the library only for GLFW when it is
+part of a larger project, see @ref GLFW_LIBRARY_TYPE.
+
+@anchor GLFW_LIBRARY_TYPE
+__GLFW_LIBRARY_TYPE__ allows you to override @ref BUILD_SHARED_LIBS only for
+GLFW, without affecting other libraries in a larger project.  When set, the
+value of this option must be a valid CMake library type.  Set it to `STATIC` to
+build GLFW as a static library, `SHARED` to build it as a shared library
+/ dynamic library / DLL, or `OBJECT` to make GLFW a CMake object library.
+
+@anchor GLFW_BUILD_EXAMPLES
+__GLFW_BUILD_EXAMPLES__ determines whether the GLFW examples are built
+along with the library.  This is enabled by default unless GLFW is being built
+as a sub-project of a larger CMake project.
+
+@anchor GLFW_BUILD_TESTS
+__GLFW_BUILD_TESTS__ determines whether the GLFW test programs are
+built along with the library.  This is enabled by default unless GLFW is being
+built as a sub-project of a larger CMake project.
+
+@anchor GLFW_BUILD_DOCS
+__GLFW_BUILD_DOCS__ determines whether the GLFW documentation is built along
+with the library.  This is enabled by default if
+[Doxygen](https://www.doxygen.nl/) is found by CMake during configuration.
+
+
+@subsection compile_options_win32 Win32 specific CMake options
+
+@anchor GLFW_BUILD_WIN32
+__GLFW_BUILD_WIN32__ determines whether to include support for Win32 when compiling the
+library.  This option is only available when compiling for Windows.  This is enabled by
+default.
+
+@anchor USE_MSVC_RUNTIME_LIBRARY_DLL
+__USE_MSVC_RUNTIME_LIBRARY_DLL__ determines whether to use the DLL version or the
+static library version of the Visual C++ runtime library.  When enabled, the
+DLL version of the Visual C++ library is used.  This is enabled by default.
+
+On CMake 3.15 and later you can set the standard CMake
+[CMAKE_MSVC_RUNTIME_LIBRARY](https://cmake.org/cmake/help/latest/variable/CMAKE_MSVC_RUNTIME_LIBRARY.html)
+variable instead of this GLFW-specific option.
+
+@anchor GLFW_USE_HYBRID_HPG
+__GLFW_USE_HYBRID_HPG__ determines whether to export the `NvOptimusEnablement` and
+`AmdPowerXpressRequestHighPerformance` symbols, which force the use of the
+high-performance GPU on Nvidia Optimus and AMD PowerXpress systems.  These symbols
+need to be exported by the EXE to be detected by the driver, so the override
+will not work if GLFW is built as a DLL.  This is disabled by default, letting
+the operating system and driver decide.
+
+
+@subsection compile_options_macos macOS specific CMake options
+
+@anchor GLFW_BUILD_COCOA
+__GLFW_BUILD_COCOA__ determines whether to include support for Cocoa when compiling the
+library.  This option is only available when compiling for macOS.  This is enabled by
+default.
+
+
+@subsection compile_options_unix Unix-like system specific CMake options
+
+@anchor GLFW_BUILD_WAYLAND
+__GLFW_BUILD_WAYLAND__ determines whether to include support for Wayland when compiling
+the library.  This option is only available when compiling for Linux and other Unix-like
+systems other than macOS.  This is disabled by default.
+
+@anchor GLFW_BUILD_X11
+__GLFW_BUILD_X11__ determines whether to include support for X11 when compiling the
+library.  This option is only available when compiling for Linux and other Unix-like
+systems other than macOS.  This is enabled by default.
+
+
+@section compile_mingw_cross Cross-compilation with CMake and MinGW
+
+Both Cygwin and many Linux distributions have MinGW or MinGW-w64 packages.  For
+example, Cygwin has the `mingw64-i686-gcc` and `mingw64-x86_64-gcc` packages
+for 32- and 64-bit version of MinGW-w64, while Debian GNU/Linux and derivatives
+like Ubuntu have the `mingw-w64` package for both.
+
+GLFW has CMake toolchain files in the `CMake` subdirectory that set up
+cross-compilation of Windows binaries.  To use these files you set the
+`CMAKE_TOOLCHAIN_FILE` CMake variable with the `-D` flag add an option when
+configuring and generating the build files.
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build -D CMAKE_TOOLCHAIN_FILE=path/to/file
+@endcode
+
+The exact toolchain file to use depends on the prefix used by the MinGW or
+MinGW-w64 binaries on your system.  You can usually see this in the /usr
+directory.  For example, both the Ubuntu and Cygwin MinGW-w64 packages have
+`/usr/x86_64-w64-mingw32` for the 64-bit compilers, so the correct invocation
+would be:
+
+@code{.sh}
+cmake -S path/to/glfw -B path/to/build -D CMAKE_TOOLCHAIN_FILE=CMake/x86_64-w64-mingw32.cmake
+@endcode
+
+The path to the toolchain file is relative to the path to the GLFW source tree
+passed to the `-S` flag, not to the current directory.
+
+For more details see the
+[CMake toolchain guide](https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html).
+
+
+@section compile_manual Compiling GLFW manually
+
+If you wish to compile GLFW without its CMake build environment then you will have to do
+at least some of the platform detection yourself.  There are preprocessor macros for
+enabling support for the platforms (window systems) available.  There are also optional,
+platform-specific macros for various features.
+
+When building, GLFW will expect the necessary configuration macros to be defined
+on the command-line.  The GLFW CMake files set these as private compile
+definitions on the GLFW target but if you compile the GLFW sources manually you
+will need to define them yourself.
+
+The window system is used to create windows, handle input, monitors, gamma ramps and
+clipboard.  The options are:
+
+ - @b _GLFW_COCOA to use the Cocoa frameworks
+ - @b _GLFW_WIN32 to use the Win32 API
+ - @b _GLFW_X11 to use the X Window System
+ - @b _GLFW_WAYLAND to use the Wayland API (incomplete)
+
+The @b _GLFW_WAYLAND and @b _GLFW_X11 macros may be combined and produces a library that
+attempts to detect the appropriate platform at initialization.
+
+If you are building GLFW as a shared library / dynamic library / DLL then you
+must also define @b _GLFW_BUILD_DLL.  Otherwise, you must not define it.
+
+If you are using a custom name for the Vulkan, EGL, GLX, OSMesa, OpenGL, GLESv1
+or GLESv2 library, you can override the default names by defining those you need
+of @b _GLFW_VULKAN_LIBRARY, @b _GLFW_EGL_LIBRARY, @b _GLFW_GLX_LIBRARY, @b
+_GLFW_OSMESA_LIBRARY, @b _GLFW_OPENGL_LIBRARY, @b _GLFW_GLESV1_LIBRARY and @b
+_GLFW_GLESV2_LIBRARY.  Otherwise, GLFW will use the built-in default names.
+
+@note None of the @ref build_macros may be defined during the compilation of
+GLFW.  If you define any of these in your build files, make sure they are not
+applied to the GLFW sources.
+
+*/

src/ThirdParty/glfw/docs/context.dox

@@ -0,0 +1,342 @@
+/*!
+
+@page context_guide Context guide
+
+@tableofcontents
+
+This guide introduces the OpenGL and OpenGL ES context related functions of
+GLFW.  For details on a specific function in this category, see the @ref
+context.  There are also guides for the other areas of the GLFW API.
+
+ - @ref intro_guide
+ - @ref window_guide
+ - @ref vulkan_guide
+ - @ref monitor_guide
+ - @ref input_guide
+
+
+@section context_object Context objects
+
+A window object encapsulates both a top-level window and an OpenGL or OpenGL ES
+context.  It is created with @ref glfwCreateWindow and destroyed with @ref
+glfwDestroyWindow or @ref glfwTerminate.  See @ref window_creation for more
+information.
+
+As the window and context are inseparably linked, the window object also serves
+as the context handle.
+
+To test the creation of various kinds of contexts and see their properties, run
+the `glfwinfo` test program.
+
+@note Vulkan does not have a context and the Vulkan instance is created via the
+Vulkan API itself.  If you will be using Vulkan to render to a window, disable
+context creation by setting the [GLFW_CLIENT_API](@ref GLFW_CLIENT_API_hint)
+hint to `GLFW_NO_API`.  For more information, see the @ref vulkan_guide.
+
+
+@subsection context_hints Context creation hints
+
+There are a number of hints, specified using @ref glfwWindowHint, related to
+what kind of context is created.  See
+[context related hints](@ref window_hints_ctx) in the window guide.
+
+
+@subsection context_sharing Context object sharing
+
+When creating a window and its OpenGL or OpenGL ES context with @ref
+glfwCreateWindow, you can specify another window whose context the new one
+should share its objects (textures, vertex and element buffers, etc.) with.
+
+@code
+GLFWwindow* second_window = glfwCreateWindow(640, 480, "Second Window", NULL, first_window);
+@endcode
+
+Object sharing is implemented by the operating system and graphics driver.  On
+platforms where it is possible to choose which types of objects are shared, GLFW
+requests that all types are shared.
+
+See the relevant chapter of the [OpenGL](https://www.opengl.org/registry/) or
+[OpenGL ES](https://www.khronos.org/opengles/) reference documents for more
+information.  The name and number of this chapter unfortunately varies between
+versions and APIs, but has at times been named _Shared Objects and Multiple
+Contexts_.
+
+GLFW comes with a barebones object sharing example program called `sharing`.
+
+
+@subsection context_offscreen Offscreen contexts
+
+GLFW doesn't support creating contexts without an associated window.  However,
+contexts with hidden windows can be created with the
+[GLFW_VISIBLE](@ref GLFW_VISIBLE_hint) window hint.
+
+@code
+glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
+
+GLFWwindow* offscreen_context = glfwCreateWindow(640, 480, "", NULL, NULL);
+@endcode
+
+The window never needs to be shown and its context can be used as a plain
+offscreen context.  Depending on the window manager, the size of a hidden
+window's framebuffer may not be usable or modifiable, so framebuffer
+objects are recommended for rendering with such contexts.
+
+You should still [process events](@ref events) as long as you have at least one
+window, even if none of them are visible.
+
+
+@subsection context_less Windows without contexts
+
+You can disable context creation by setting the
+[GLFW_CLIENT_API](@ref GLFW_CLIENT_API_hint) hint to `GLFW_NO_API`.  Windows
+without contexts must not be passed to @ref glfwMakeContextCurrent or @ref
+glfwSwapBuffers.
+
+
+@section context_current Current context
+
+Before you can make OpenGL or OpenGL ES calls, you need to have a current
+context of the correct type.  A context can only be current for a single thread
+at a time, and a thread can only have a single context current at a time.
+
+When moving a context between threads, you must make it non-current on the old
+thread before making it current on the new one.
+
+The context of a window is made current with @ref glfwMakeContextCurrent.
+
+@code
+glfwMakeContextCurrent(window);
+@endcode
+
+The window of the current context is returned by @ref glfwGetCurrentContext.
+
+@code
+GLFWwindow* window = glfwGetCurrentContext();
+@endcode
+
+The following GLFW functions require a context to be current.  Calling any these
+functions without a current context will generate a @ref GLFW_NO_CURRENT_CONTEXT
+error.
+
+ - @ref glfwSwapInterval
+ - @ref glfwExtensionSupported
+ - @ref glfwGetProcAddress
+
+
+@section context_swap Buffer swapping
+
+See @ref buffer_swap in the window guide.
+
+
+@section context_glext OpenGL and OpenGL ES extensions
+
+One of the benefits of OpenGL and OpenGL ES is their extensibility.
+Hardware vendors may include extensions in their implementations that extend the
+API before that functionality is included in a new version of the OpenGL or
+OpenGL ES specification, and some extensions are never included and remain
+as extensions until they become obsolete.
+
+An extension is defined by:
+
+- An extension name (e.g. `GL_ARB_gl_spirv`)
+- New OpenGL tokens (e.g. `GL_SPIR_V_BINARY_ARB`)
+- New OpenGL functions (e.g. `glSpecializeShaderARB`)
+
+Note the `ARB` affix, which stands for Architecture Review Board and is used
+for official extensions.  The extension above was created by the ARB, but there
+are many different affixes, like `NV` for Nvidia and `AMD` for, well, AMD.  Any
+group may also use the generic `EXT` affix.  Lists of extensions, together with
+their specifications, can be found at the
+[OpenGL Registry](https://www.opengl.org/registry/) and
+[OpenGL ES Registry](https://www.khronos.org/registry/gles/).
+
+
+@subsection context_glext_auto Loading extension with a loader library
+
+An extension loader library is the easiest and best way to access both OpenGL and
+OpenGL ES extensions and modern versions of the core OpenGL or OpenGL ES APIs.
+They will take care of all the details of declaring and loading everything you
+need.  One such library is [glad](https://github.com/Dav1dde/glad) and there are
+several others.
+
+The following example will use glad but all extension loader libraries work
+similarly.
+
+First you need to generate the source files using the glad Python script.  This
+example generates a loader for any version of OpenGL, which is the default for
+both GLFW and glad, but loaders for OpenGL ES, as well as loaders for specific
+API versions and extension sets can be generated.  The generated files are
+written to the `output` directory.
+
+@code{.sh}
+python main.py --generator c --no-loader --out-path output
+@endcode
+
+The `--no-loader` option is added because GLFW already provides a function for
+loading OpenGL and OpenGL ES function pointers, one that automatically uses the
+selected context creation API, and glad can call this instead of having to
+implement its own.  There are several other command-line options as well.  See
+the glad documentation for details.
+
+Add the generated `output/src/glad.c`, `output/include/glad/glad.h` and
+`output/include/KHR/khrplatform.h` files to your build.  Then you need to
+include the glad header file, which will replace the OpenGL header of your
+development environment.  By including the glad header before the GLFW header,
+it suppresses the development environment's OpenGL or OpenGL ES header.
+
+@code
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+@endcode
+
+Finally you need to initialize glad once you have a suitable current context.
+
+@code
+window = glfwCreateWindow(640, 480, "My Window", NULL, NULL);
+if (!window)
+{
+    ...
+}
+
+glfwMakeContextCurrent(window);
+
+gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
+@endcode
+
+Once glad has been loaded, you have access to all OpenGL core and extension
+functions supported by both the context you created and the glad loader you
+generated and you are ready to start rendering.
+
+You can specify a minimum required OpenGL or OpenGL ES version with
+[context hints](@ref window_hints_ctx).  If your needs are more complex, you can
+check the actual OpenGL or OpenGL ES version with
+[context attributes](@ref window_attribs_ctx), or you can check whether
+a specific version is supported by the current context with the
+`GLAD_GL_VERSION_x_x` booleans.
+
+@code
+if (GLAD_GL_VERSION_3_2)
+{
+    // Call OpenGL 3.2+ specific code
+}
+@endcode
+
+To check whether a specific extension is supported, use the `GLAD_GL_xxx`
+booleans.
+
+@code
+if (GLAD_GL_ARB_gl_spirv)
+{
+    // Use GL_ARB_gl_spirv
+}
+@endcode
+
+
+@subsection context_glext_manual Loading extensions manually
+
+__Do not use this technique__ unless it is absolutely necessary.  An
+[extension loader library](@ref context_glext_auto) will save you a ton of
+tedious, repetitive, error prone work.
+
+To use a certain extension, you must first check whether the context supports
+that extension and then, if it introduces new functions, retrieve the pointers
+to those functions.  GLFW provides @ref glfwExtensionSupported and @ref
+glfwGetProcAddress for manual loading of extensions and new API functions.
+
+This section will demonstrate manual loading of OpenGL extensions.  The loading
+of OpenGL ES extensions is identical except for the name of the extension header.
+
+
+@subsubsection context_glext_header The glext.h header
+
+The `glext.h` extension header is a continually updated file that defines the
+interfaces for all OpenGL extensions.  The latest version of this can always be
+found at the [OpenGL Registry](https://www.opengl.org/registry/).  There are also
+extension headers for the various versions of OpenGL ES at the
+[OpenGL ES Registry](https://www.khronos.org/registry/gles/).  It it strongly
+recommended that you use your own copy of the extension header, as the one
+included in your development environment may be several years out of date and
+may not include the extensions you wish to use.
+
+The header defines function pointer types for all functions of all extensions it
+supports.  These have names like `PFNGLSPECIALIZESHADERARBPROC` (for
+`glSpecializeShaderARB`), i.e. the name is made uppercase and `PFN` (pointer
+to function) and `PROC` (procedure) are added to the ends.
+
+To include the extension header, define @ref GLFW_INCLUDE_GLEXT before including
+the GLFW header.
+
+@code
+#define GLFW_INCLUDE_GLEXT
+#include <GLFW/glfw3.h>
+@endcode
+
+
+@subsubsection context_glext_string Checking for extensions
+
+A given machine may not actually support the extension (it may have older
+drivers or a graphics card that lacks the necessary hardware features), so it
+is necessary to check at run-time whether the context supports the extension.
+This is done with @ref glfwExtensionSupported.
+
+@code
+if (glfwExtensionSupported("GL_ARB_gl_spirv"))
+{
+    // The extension is supported by the current context
+}
+@endcode
+
+The argument is a null terminated ASCII string with the extension name.  If the
+extension is supported, @ref glfwExtensionSupported returns `GLFW_TRUE`,
+otherwise it returns `GLFW_FALSE`.
+
+
+@subsubsection context_glext_proc Fetching function pointers
+
+Many extensions, though not all, require the use of new OpenGL functions.
+These functions often do not have entry points in the client API libraries of
+your operating system, making it necessary to fetch them at run time.  You can
+retrieve pointers to these functions with @ref glfwGetProcAddress.
+
+@code
+PFNGLSPECIALIZESHADERARBPROC pfnSpecializeShaderARB = glfwGetProcAddress("glSpecializeShaderARB");
+@endcode
+
+In general, you should avoid giving the function pointer variables the (exact)
+same name as the function, as this may confuse your linker.  Instead, you can
+use a different prefix, like above, or some other naming scheme.
+
+Now that all the pieces have been introduced, here is what they might look like
+when used together.
+
+@code
+#define GLFW_INCLUDE_GLEXT
+#include <GLFW/glfw3.h>
+
+#define glSpecializeShaderARB pfnSpecializeShaderARB
+PFNGLSPECIALIZESHADERARBPROC pfnSpecializeShaderARB;
+
+// Flag indicating whether the extension is supported
+int has_ARB_gl_spirv = 0;
+
+void load_extensions(void)
+{
+    if (glfwExtensionSupported("GL_ARB_gl_spirv"))
+    {
+        pfnSpecializeShaderARB = (PFNGLSPECIALIZESHADERARBPROC)
+            glfwGetProcAddress("glSpecializeShaderARB");
+        has_ARB_gl_spirv = 1;
+    }
+}
+
+void some_function(void)
+{
+    if (has_ARB_gl_spirv)
+    {
+        // Now the extension function can be called as usual
+        glSpecializeShaderARB(...);
+    }
+}
+@endcode
+
+*/

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src/ThirdParty/glfw/docs/extra.scss

@@ -0,0 +1,449 @@
+// NOTE: Please use this file to perform modifications on default style sheets.
+//
+// You need to install the official Sass CLI tool:
+// npm install -g sass
+//
+// Run this command to regenerate extra.css after you're finished with changes:
+// sass --style=compressed extra.scss extra.css
+//
+// Alternatively you can use online services to regenerate extra.css.
+
+
+// Default text color for page contents
+$default-text-color: hsl(0,0%,30%);
+
+// Page header, footer, table rows, inline codes and definition lists
+$header-footer-background-color: hsl(0,0%,95%);
+
+// Page header, footer links and navigation bar background
+$header-footer-link-color: hsl(0,0%,40%);
+
+// Doxygen navigation bar links
+$navbar-link-color: $header-footer-background-color;
+
+// Page content background color
+$content-background-color: hsl(0,0%,100%);
+
+// Bold, italic, h1, h2, ... and table of contents
+$heading-color: hsl(0,0%,10%);
+
+// Function, enum and macro definition separator
+$def-separator-color: $header-footer-background-color;
+
+// Base color hue
+$base-hue: 24;
+
+// Default color used for links
+$default-link-color: hsl($base-hue,100%,50%);
+
+// Doxygen navigation bar active tab
+$tab-text-color: hsl(0,0%,100%);
+$tab-background-color1: $default-link-color;
+$tab-background-color2: lighten(adjust-hue($tab-background-color1, 10), 10%);
+
+// Table borders
+$default-border-color: $default-link-color;
+
+// Table header
+$table-text-color: $tab-text-color;
+$table-background-color1: $tab-background-color1;
+$table-background-color2: $tab-background-color2;
+
+// Table of contents, data structure index and prototypes
+$toc-background-color1: hsl(0,0%,90%);
+$toc-background-color2: lighten($toc-background-color1, 5%);
+
+// Function prototype parameters color
+$prototype-param-color: darken($default-link-color, 25%);
+
+// Message box color: note, pre, post and invariant
+$box-note-color: hsl(103,80%,85%);
+
+// Message box color: warning and attention
+$box-warning-color: hsl(34,80%,85%);
+
+// Message box color: deprecated and bug
+$box-bug-color: hsl(333,80%,85%);
+
+// Message box color: todo and test
+$box-todo-color: hsl(200,80%,85%);
+
+// Message box helper function
+@mixin message-box($base-color){
+	background:linear-gradient(to bottom,lighten($base-color, 5%) 0%,$base-color 100%);
+	box-shadow:inset 0 0 32px darken($base-color, 5%);
+	color:darken($base-color, 67%);
+	border:2px solid desaturate(darken($base-color, 10%), 20%);
+}
+
+.sm-dox,.sm-dox a,.sm-dox a:focus,.sm-dox a:active,.sm-dox a:hover,.sm-dox a.highlighted,.sm-dox ul a:hover {
+	background:none;
+	text-shadow:none;
+}
+
+.sm-dox a span.sub-arrow {
+	border-color:$navbar-link-color transparent transparent transparent;
+}
+
+.sm-dox a span.sub-arrow:active,.sm-dox a span.sub-arrow:focus,.sm-dox a span.sub-arrow:hover,.sm-dox a:hover span.sub-arrow {
+	border-color:$default-link-color transparent transparent transparent;
+}
+
+.sm-dox ul a span.sub-arrow:active,.sm-dox ul a span.sub-arrow:focus,.sm-dox ul a span.sub-arrow:hover,.sm-dox ul a:hover span.sub-arrow {
+	border-color:transparent transparent transparent $default-link-color;
+}
+
+.sm-dox ul a:hover {
+	background:$header-footer-link-color;
+	text-shadow:none;
+}
+
+.sm-dox ul.sm-nowrap a {
+	color:$default-text-color;
+	text-shadow:none;
+}
+
+#main-nav,#main-menu,#main-menu a,#main-menu a:visited,#main-menu a:hover,#main-menu li,.memdoc,dl.reflist dd,div.toc li,.ah,span.lineno,span.lineno a,span.lineno a:hover,.note code,.pre code,.post code,.invariant code,.warning code,.attention code,.deprecated code,.bug code,.todo code,.test code,.doxtable code,.markdownTable code {
+	background:none;
+}
+
+#titlearea,.footer,.contents,div.header,.memdoc,table.doxtable td,table.doxtable th,table.markdownTable td,table.markdownTable th,hr,.memSeparator {
+	border:none;
+}
+
+#main-menu a,#main-menu a:visited,#main-menu a:hover,#main-menu li,.reflist dt a.el,.levels span,.directory .levels span {
+	text-shadow:none;
+}
+
+.memdoc,dl.reflist dd {
+	box-shadow:none;
+}
+
+div.headertitle,.note code,.pre code,.post code,.invariant code,.warning code,.attention code,.deprecated code,.bug code,.todo code,.test code,table.doxtable code,table.markdownTable code {
+	padding:0;
+}
+
+#nav-path,.directory .levels,span.lineno {
+	display:none;
+}
+
+html,#titlearea,.footer,tr.even,.directory tr.even,.doxtable tr:nth-child(even),tr.markdownTableBody:nth-child(even),.mdescLeft,.mdescRight,.memItemLeft,.memItemRight,code,.markdownTableRowEven {
+	background:$header-footer-background-color;
+}
+
+body {
+	color:$default-text-color;
+}
+
+div.title {
+    font-size: 170%;
+    margin: 1em 0 0.5em 0;
+}
+
+h1,h2,h2.groupheader,h3,div.toc h3,h4,h5,h6,strong,em {
+	color:$heading-color;
+	border-bottom:none;
+}
+
+h1 {
+	padding-top:0.5em;
+	font-size:150%;
+}
+
+h2 {
+	padding-top:0.5em;
+	margin-bottom:0;
+	font-size:130%;
+}
+
+h3 {
+	padding-top:0.5em;
+	margin-bottom:0;
+	font-size:110%;
+}
+
+.glfwheader {
+	font-size:16px;
+	min-height:64px;
+	max-width:920px;
+	padding:0 32px;
+	margin:0 auto;
+
+	display: flex;
+	flex-direction: row;
+	flex-wrap: wrap;
+	justify-content: flex-start;
+	align-items: center;
+	align-content: stretch;
+}
+
+#glfwhome {
+	line-height:64px;
+	padding-right:48px;
+	color:$header-footer-link-color;
+	font-size:2.5em;
+	background:url("https://www.glfw.org/css/arrow.png") no-repeat right;
+}
+
+.glfwnavbar {
+	list-style-type:none;
+	margin:0 0 0 auto;
+	float:right;
+}
+
+#glfwhome,.glfwnavbar li {
+	float:left;
+}
+
+.glfwnavbar a,.glfwnavbar a:visited {
+	line-height:64px;
+	margin-left:2em;
+	display:block;
+	color:$header-footer-link-color;
+}
+
+.glfwnavbar {
+	padding-left: 0;
+}
+
+#glfwhome,.glfwnavbar a,.glfwnavbar a:visited {
+	transition:.35s ease;
+}
+
+#titlearea,.footer {
+	color:$header-footer-link-color;
+}
+
+address.footer {
+	text-align:center;
+	padding:2em;
+	margin-top:3em;
+}
+
+#top {
+	background:$header-footer-link-color;
+}
+
+#main-nav {
+	max-width:960px;
+	margin:0 auto;
+	font-size:13px;
+}
+
+#main-menu {
+	max-width:920px;
+	margin:0 auto;
+	font-size:13px;
+}
+
+.memtitle {
+	display:none;
+}
+
+.memproto,.memname {
+	font-weight:bold;
+	text-shadow:none;
+}
+
+#main-menu {
+	min-height:36px;
+	display: flex;
+	flex-direction: row;
+	flex-wrap: wrap;
+	justify-content: flex-start;
+	align-items: center;
+	align-content: stretch;
+}
+
+#main-menu a,#main-menu a:visited,#main-menu a:hover,#main-menu li {
+	color:$navbar-link-color;
+}
+
+#main-menu li ul.sm-nowrap li a {
+	color:$default-text-color;
+}
+
+#main-menu li ul.sm-nowrap li a:hover {
+	color:$default-link-color;
+}
+
+#main-menu > li:last-child {
+	margin: 0 0 0 auto;
+}
+
+.contents {
+	min-height:590px;
+}
+
+div.contents,div.header {
+	max-width:920px;
+	margin:0 auto;
+	padding:0 32px;
+	background:$content-background-color none;
+}
+
+table.doxtable th,table.markdownTable th,dl.reflist dt {
+	background:linear-gradient(to bottom,$table-background-color2 0%,$table-background-color1 100%);
+	box-shadow:inset 0 0 32px $table-background-color1;
+	text-shadow:0 -1px 1px darken($table-background-color1, 15%);
+	text-align:left;
+	color:$table-text-color;
+}
+
+dl.reflist dt a.el {
+	color:$default-link-color;
+	padding:.2em;
+	border-radius:4px;
+	background-color:lighten($default-link-color, 40%);
+}
+
+div.toc {
+	float:right;
+	width:35%;
+}
+
+@media screen and (max-width:600px) {
+	div.toc {
+		float:none;
+		width:inherit;
+		margin:0;
+	}
+}
+
+div.toc h3 {
+	font-size:1.17em;
+}
+
+div.toc ul {
+	padding-left:1.5em;
+}
+
+div.toc li {
+	font-size:1em;
+	padding-left:0;
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+}
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src/ThirdParty/glfw/docs/footer.html

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+<address class="footer">
+<p>
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+</address>
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src/ThirdParty/glfw/docs/header.html

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src/ThirdParty/glfw/docs/input.dox

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+/*!
+
+@page input_guide Input guide
+
+@tableofcontents
+
+This guide introduces the input related functions of GLFW.  For details on
+a specific function in this category, see the @ref input.  There are also guides
+for the other areas of GLFW.
+
+ - @ref intro_guide
+ - @ref window_guide
+ - @ref context_guide
+ - @ref vulkan_guide
+ - @ref monitor_guide
+
+GLFW provides many kinds of input.  While some can only be polled, like time, or
+only received via callbacks, like scrolling, many provide both callbacks and
+polling.  Callbacks are more work to use than polling but is less CPU intensive
+and guarantees that you do not miss state changes.
+
+All input callbacks receive a window handle.  By using the
+[window user pointer](@ref window_userptr), you can access non-global structures
+or objects from your callbacks.
+
+To get a better feel for how the various events callbacks behave, run the
+`events` test program.  It register every callback supported by GLFW and prints
+out all arguments provided for every event, along with time and sequence
+information.
+
+
+@section events Event processing
+
+GLFW needs to poll the window system for events both to provide input to the
+application and to prove to the window system that the application hasn't locked
+up.  Event processing is normally done each frame after
+[buffer swapping](@ref buffer_swap).  Even when you have no windows, event
+polling needs to be done in order to receive monitor and joystick connection
+events.
+
+There are three functions for processing pending events.  @ref glfwPollEvents,
+processes only those events that have already been received and then returns
+immediately.
+
+@code
+glfwPollEvents();
+@endcode
+
+This is the best choice when rendering continuously, like most games do.
+
+If you only need to update the contents of the window when you receive new
+input, @ref glfwWaitEvents is a better choice.
+
+@code
+glfwWaitEvents();
+@endcode
+
+It puts the thread to sleep until at least one event has been received and then
+processes all received events.  This saves a great deal of CPU cycles and is
+useful for, for example, editing tools.
+
+If you want to wait for events but have UI elements or other tasks that need
+periodic updates, @ref glfwWaitEventsTimeout lets you specify a timeout.
+
+@code
+glfwWaitEventsTimeout(0.7);
+@endcode
+
+It puts the thread to sleep until at least one event has been received, or until
+the specified number of seconds have elapsed.  It then processes any received
+events.
+
+If the main thread is sleeping in @ref glfwWaitEvents, you can wake it from
+another thread by posting an empty event to the event queue with @ref
+glfwPostEmptyEvent.
+
+@code
+glfwPostEmptyEvent();
+@endcode
+
+Do not assume that callbacks will _only_ be called in response to the above
+functions.  While it is necessary to process events in one or more of the ways
+above, window systems that require GLFW to register callbacks of its own can
+pass events to GLFW in response to many window system function calls.  GLFW will
+pass those events on to the application callbacks before returning.
+
+For example, on Windows the system function that @ref glfwSetWindowSize is
+implemented with will send window size events directly to the event callback
+that every window has and that GLFW implements for its windows.  If you have set
+a [window size callback](@ref window_size) GLFW will call it in turn with the
+new size before everything returns back out of the @ref glfwSetWindowSize call.
+
+
+@section input_keyboard Keyboard input
+
+GLFW divides keyboard input into two categories; key events and character
+events.  Key events relate to actual physical keyboard keys, whereas character
+events relate to the Unicode code points generated by pressing some of them.
+
+Keys and characters do not map 1:1.  A single key press may produce several
+characters, and a single character may require several keys to produce.  This
+may not be the case on your machine, but your users are likely not all using the
+same keyboard layout, input method or even operating system as you.
+
+
+@subsection input_key Key input
+
+If you wish to be notified when a physical key is pressed or released or when it
+repeats, set a key callback.
+
+@code
+glfwSetKeyCallback(window, key_callback);
+@endcode
+
+The callback function receives the [keyboard key](@ref keys), platform-specific
+scancode, key action and [modifier bits](@ref mods).
+
+@code
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    if (key == GLFW_KEY_E && action == GLFW_PRESS)
+        activate_airship();
+}
+@endcode
+
+The action is one of `GLFW_PRESS`, `GLFW_REPEAT` or `GLFW_RELEASE`.  The key
+will be `GLFW_KEY_UNKNOWN` if GLFW lacks a key token for it, for example
+_E-mail_ and _Play_ keys.
+
+The scancode is unique for every key, regardless of whether it has a key token.
+Scancodes are platform-specific but consistent over time, so keys will have
+different scancodes depending on the platform but they are safe to save to disk.
+You can query the scancode for any [named key](@ref keys) on the current
+platform with @ref glfwGetKeyScancode.
+
+@code
+const int scancode = glfwGetKeyScancode(GLFW_KEY_X);
+set_key_mapping(scancode, swap_weapons);
+@endcode
+
+The last reported state for every [named key](@ref keys) is also saved in
+per-window state arrays that can be polled with @ref glfwGetKey.
+
+@code
+int state = glfwGetKey(window, GLFW_KEY_E);
+if (state == GLFW_PRESS)
+{
+    activate_airship();
+}
+@endcode
+
+The returned state is one of `GLFW_PRESS` or `GLFW_RELEASE`.
+
+This function only returns cached key event state.  It does not poll the
+system for the current physical state of the key.
+
+@anchor GLFW_STICKY_KEYS
+Whenever you poll state, you risk missing the state change you are looking for.
+If a pressed key is released again before you poll its state, you will have
+missed the key press.  The recommended solution for this is to use a
+key callback, but there is also the `GLFW_STICKY_KEYS` input mode.
+
+@code
+glfwSetInputMode(window, GLFW_STICKY_KEYS, GLFW_TRUE);
+@endcode
+
+When sticky keys mode is enabled, the pollable state of a key will remain
+`GLFW_PRESS` until the state of that key is polled with @ref glfwGetKey.  Once
+it has been polled, if a key release event had been processed in the meantime,
+the state will reset to `GLFW_RELEASE`, otherwise it will remain `GLFW_PRESS`.
+
+@anchor GLFW_LOCK_KEY_MODS
+If you wish to know what the state of the Caps Lock and Num Lock keys was when
+input events were generated, set the `GLFW_LOCK_KEY_MODS` input mode.
+
+@code
+glfwSetInputMode(window, GLFW_LOCK_KEY_MODS, GLFW_TRUE);
+@endcode
+
+When this input mode is enabled, any callback that receives
+[modifier bits](@ref mods) will have the @ref GLFW_MOD_CAPS_LOCK bit set if Caps
+Lock was on when the event occurred and the @ref GLFW_MOD_NUM_LOCK bit set if
+Num Lock was on.
+
+The `GLFW_KEY_LAST` constant holds the highest value of any
+[named key](@ref keys).
+
+
+@subsection input_char Text input
+
+GLFW supports text input in the form of a stream of
+[Unicode code points](https://en.wikipedia.org/wiki/Unicode), as produced by the
+operating system text input system.  Unlike key input, text input obeys keyboard
+layouts and modifier keys and supports composing characters using
+[dead keys](https://en.wikipedia.org/wiki/Dead_key).  Once received, you can
+encode the code points into UTF-8 or any other encoding you prefer.
+
+Because an `unsigned int` is 32 bits long on all platforms supported by GLFW,
+you can treat the code point argument as native endian UTF-32.
+
+If you wish to offer regular text input, set a character callback.
+
+@code
+glfwSetCharCallback(window, character_callback);
+@endcode
+
+The callback function receives Unicode code points for key events that would
+have led to regular text input and generally behaves as a standard text field on
+that platform.
+
+@code
+void character_callback(GLFWwindow* window, unsigned int codepoint)
+{
+}
+@endcode
+
+
+@subsection input_key_name Key names
+
+If you wish to refer to keys by name, you can query the keyboard layout
+dependent name of printable keys with @ref glfwGetKeyName.
+
+@code
+const char* key_name = glfwGetKeyName(GLFW_KEY_W, 0);
+show_tutorial_hint("Press %s to move forward", key_name);
+@endcode
+
+This function can handle both [keys and scancodes](@ref input_key).  If the
+specified key is `GLFW_KEY_UNKNOWN` then the scancode is used, otherwise it is
+ignored.  This matches the behavior of the key callback, meaning the callback
+arguments can always be passed unmodified to this function.
+
+
+@section input_mouse Mouse input
+
+Mouse input comes in many forms, including mouse motion, button presses and
+scrolling offsets.  The cursor appearance can also be changed, either to
+a custom image or a standard cursor shape from the system theme.
+
+
+@subsection cursor_pos Cursor position
+
+If you wish to be notified when the cursor moves over the window, set a cursor
+position callback.
+
+@code
+glfwSetCursorPosCallback(window, cursor_position_callback);
+@endcode
+
+The callback functions receives the cursor position, measured in screen
+coordinates but relative to the top-left corner of the window content area.  On
+platforms that provide it, the full sub-pixel cursor position is passed on.
+
+@code
+static void cursor_position_callback(GLFWwindow* window, double xpos, double ypos)
+{
+}
+@endcode
+
+The cursor position is also saved per-window and can be polled with @ref
+glfwGetCursorPos.
+
+@code
+double xpos, ypos;
+glfwGetCursorPos(window, &xpos, &ypos);
+@endcode
+
+
+@subsection cursor_mode Cursor mode
+
+@anchor GLFW_CURSOR
+The `GLFW_CURSOR` input mode provides several cursor modes for special forms of
+mouse motion input.  By default, the cursor mode is `GLFW_CURSOR_NORMAL`,
+meaning the regular arrow cursor (or another cursor set with @ref glfwSetCursor)
+is used and cursor motion is not limited.
+
+If you wish to implement mouse motion based camera controls or other input
+schemes that require unlimited mouse movement, set the cursor mode to
+`GLFW_CURSOR_DISABLED`.
+
+@code
+glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+@endcode
+
+This will hide the cursor and lock it to the specified window.  GLFW will then
+take care of all the details of cursor re-centering and offset calculation and
+providing the application with a virtual cursor position.  This virtual position
+is provided normally via both the cursor position callback and through polling.
+
+@note You should not implement your own version of this functionality using
+other features of GLFW.  It is not supported and will not work as robustly as
+`GLFW_CURSOR_DISABLED`.
+
+If you only wish the cursor to become hidden when it is over a window but still
+want it to behave normally, set the cursor mode to `GLFW_CURSOR_HIDDEN`.
+
+@code
+glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
+@endcode
+
+This mode puts no limit on the motion of the cursor.
+
+To exit out of either of these special modes, restore the `GLFW_CURSOR_NORMAL`
+cursor mode.
+
+@code
+glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+@endcode
+
+
+@anchor GLFW_RAW_MOUSE_MOTION
+@subsection raw_mouse_motion Raw mouse motion
+
+When the cursor is disabled, raw (unscaled and unaccelerated) mouse motion can
+be enabled if available.
+
+Raw mouse motion is closer to the actual motion of the mouse across a surface.
+It is not affected by the scaling and acceleration applied to the motion of the
+desktop cursor.  That processing is suitable for a cursor while raw motion is
+better for controlling for example a 3D camera.  Because of this, raw mouse
+motion is only provided when the cursor is disabled.
+
+Call @ref glfwRawMouseMotionSupported to check if the current machine provides
+raw motion and set the `GLFW_RAW_MOUSE_MOTION` input mode to enable it.  It is
+disabled by default.
+
+@code
+if (glfwRawMouseMotionSupported())
+    glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE);
+@endcode
+
+If supported, raw mouse motion can be enabled or disabled per-window and at any
+time but it will only be provided when the cursor is disabled.
+
+
+@subsection cursor_object Cursor objects
+
+GLFW supports creating both custom and system theme cursor images, encapsulated
+as @ref GLFWcursor objects.  They are created with @ref glfwCreateCursor or @ref
+glfwCreateStandardCursor and destroyed with @ref glfwDestroyCursor, or @ref
+glfwTerminate, if any remain.
+
+
+@subsubsection cursor_custom Custom cursor creation
+
+A custom cursor is created with @ref glfwCreateCursor, which returns a handle to
+the created cursor object.  For example, this creates a 16x16 white square
+cursor with the hot-spot in the upper-left corner:
+
+@code
+unsigned char pixels[16 * 16 * 4];
+memset(pixels, 0xff, sizeof(pixels));
+
+GLFWimage image;
+image.width = 16;
+image.height = 16;
+image.pixels = pixels;
+
+GLFWcursor* cursor = glfwCreateCursor(&image, 0, 0);
+@endcode
+
+If cursor creation fails, `NULL` will be returned, so it is necessary to check
+the return value.
+
+The image data is 32-bit, little-endian, non-premultiplied RGBA, i.e. eight bits
+per channel with the red channel first.  The pixels are arranged canonically as
+sequential rows, starting from the top-left corner.
+
+
+@subsubsection cursor_standard Standard cursor creation
+
+A cursor with a [standard shape](@ref shapes) from the current system cursor
+theme can be can be created with @ref glfwCreateStandardCursor.
+
+@code
+GLFWcursor* url_cursor = glfwCreateStandardCursor(GLFW_POINTING_HAND_CURSOR);
+@endcode
+
+These cursor objects behave in the exact same way as those created with @ref
+glfwCreateCursor except that the system cursor theme provides the actual image.
+
+A few of these shapes are not available everywhere.  If a shape is unavailable,
+`NULL` is returned.  See @ref glfwCreateStandardCursor for details.
+
+
+@subsubsection cursor_destruction Cursor destruction
+
+When a cursor is no longer needed, destroy it with @ref glfwDestroyCursor.
+
+@code
+glfwDestroyCursor(cursor);
+@endcode
+
+Cursor destruction always succeeds.  If the cursor is current for any window,
+that window will revert to the default cursor.  This does not affect the cursor
+mode.  All remaining cursors are destroyed when @ref glfwTerminate is called.
+
+
+@subsubsection cursor_set Cursor setting
+
+A cursor can be set as current for a window with @ref glfwSetCursor.
+
+@code
+glfwSetCursor(window, cursor);
+@endcode
+
+Once set, the cursor image will be used as long as the system cursor is over the
+content area of the window and the [cursor mode](@ref cursor_mode) is set
+to `GLFW_CURSOR_NORMAL`.
+
+A single cursor may be set for any number of windows.
+
+To revert to the default cursor, set the cursor of that window to `NULL`.
+
+@code
+glfwSetCursor(window, NULL);
+@endcode
+
+When a cursor is destroyed, any window that has it set will revert to the
+default cursor.  This does not affect the cursor mode.
+
+
+@subsection cursor_enter Cursor enter/leave events
+
+If you wish to be notified when the cursor enters or leaves the content area of
+a window, set a cursor enter/leave callback.
+
+@code
+glfwSetCursorEnterCallback(window, cursor_enter_callback);
+@endcode
+
+The callback function receives the new classification of the cursor.
+
+@code
+void cursor_enter_callback(GLFWwindow* window, int entered)
+{
+    if (entered)
+    {
+        // The cursor entered the content area of the window
+    }
+    else
+    {
+        // The cursor left the content area of the window
+    }
+}
+@endcode
+
+You can query whether the cursor is currently inside the content area of the
+window with the [GLFW_HOVERED](@ref GLFW_HOVERED_attrib) window attribute.
+
+@code
+if (glfwGetWindowAttrib(window, GLFW_HOVERED))
+{
+    highlight_interface();
+}
+@endcode
+
+
+@subsection input_mouse_button Mouse button input
+
+If you wish to be notified when a mouse button is pressed or released, set
+a mouse button callback.
+
+@code
+glfwSetMouseButtonCallback(window, mouse_button_callback);
+@endcode
+
+The callback function receives the [mouse button](@ref buttons), button action
+and [modifier bits](@ref mods).
+
+@code
+void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
+{
+    if (button == GLFW_MOUSE_BUTTON_RIGHT && action == GLFW_PRESS)
+        popup_menu();
+}
+@endcode
+
+The action is one of `GLFW_PRESS` or `GLFW_RELEASE`.
+
+Mouse button states for [named buttons](@ref buttons) are also saved in
+per-window state arrays that can be polled with @ref glfwGetMouseButton.
+
+@code
+int state = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT);
+if (state == GLFW_PRESS)
+{
+    upgrade_cow();
+}
+@endcode
+
+The returned state is one of `GLFW_PRESS` or `GLFW_RELEASE`.
+
+This function only returns cached mouse button event state.  It does not poll
+the system for the current state of the mouse button.
+
+@anchor GLFW_STICKY_MOUSE_BUTTONS
+Whenever you poll state, you risk missing the state change you are looking for.
+If a pressed mouse button is released again before you poll its state, you will have
+missed the button press.  The recommended solution for this is to use a
+mouse button callback, but there is also the `GLFW_STICKY_MOUSE_BUTTONS`
+input mode.
+
+@code
+glfwSetInputMode(window, GLFW_STICKY_MOUSE_BUTTONS, GLFW_TRUE);
+@endcode
+
+When sticky mouse buttons mode is enabled, the pollable state of a mouse button
+will remain `GLFW_PRESS` until the state of that button is polled with @ref
+glfwGetMouseButton.  Once it has been polled, if a mouse button release event
+had been processed in the meantime, the state will reset to `GLFW_RELEASE`,
+otherwise it will remain `GLFW_PRESS`.
+
+The `GLFW_MOUSE_BUTTON_LAST` constant holds the highest value of any
+[named button](@ref buttons).
+
+
+@subsection scrolling Scroll input
+
+If you wish to be notified when the user scrolls, whether with a mouse wheel or
+touchpad gesture, set a scroll callback.
+
+@code
+glfwSetScrollCallback(window, scroll_callback);
+@endcode
+
+The callback function receives two-dimensional scroll offsets.
+
+@code
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+}
+@endcode
+
+A normal mouse wheel, being vertical, provides offsets along the Y-axis.
+
+
+@section joystick Joystick input
+
+The joystick functions expose connected joysticks and controllers, with both
+referred to as joysticks.  It supports up to sixteen joysticks, ranging from
+`GLFW_JOYSTICK_1`, `GLFW_JOYSTICK_2` up to and including `GLFW_JOYSTICK_16` or
+`GLFW_JOYSTICK_LAST`.  You can test whether a [joystick](@ref joysticks) is
+present with @ref glfwJoystickPresent.
+
+@code
+int present = glfwJoystickPresent(GLFW_JOYSTICK_1);
+@endcode
+
+Each joystick has zero or more axes, zero or more buttons, zero or more hats,
+a human-readable name, a user pointer and an SDL compatible GUID.
+
+Detected joysticks are added to the beginning of the array.  Once a joystick is
+detected, it keeps its assigned ID until it is disconnected or the library is
+terminated, so as joysticks are connected and disconnected, there may appear
+gaps in the IDs.
+
+Joystick axis, button and hat state is updated when polled and does not require
+a window to be created or events to be processed.  However, if you want joystick
+connection and disconnection events reliably delivered to the
+[joystick callback](@ref joystick_event) then you must
+[process events](@ref events).
+
+To see all the properties of all connected joysticks in real-time, run the
+`joysticks` test program.
+
+
+@subsection joystick_axis Joystick axis states
+
+The positions of all axes of a joystick are returned by @ref
+glfwGetJoystickAxes.  See the reference documentation for the lifetime of the
+returned array.
+
+@code
+int count;
+const float* axes = glfwGetJoystickAxes(GLFW_JOYSTICK_5, &count);
+@endcode
+
+Each element in the returned array is a value between -1.0 and 1.0.
+
+
+@subsection joystick_button Joystick button states
+
+The states of all buttons of a joystick are returned by @ref
+glfwGetJoystickButtons.  See the reference documentation for the lifetime of the
+returned array.
+
+@code
+int count;
+const unsigned char* buttons = glfwGetJoystickButtons(GLFW_JOYSTICK_3, &count);
+@endcode
+
+Each element in the returned array is either `GLFW_PRESS` or `GLFW_RELEASE`.
+
+For backward compatibility with earlier versions that did not have @ref
+glfwGetJoystickHats, the button array by default also includes all hats.  See
+the reference documentation for @ref glfwGetJoystickButtons for details.
+
+
+@subsection joystick_hat Joystick hat states
+
+The states of all hats are returned by @ref glfwGetJoystickHats.  See the
+reference documentation for the lifetime of the returned array.
+
+@code
+int count;
+const unsigned char* hats = glfwGetJoystickHats(GLFW_JOYSTICK_7, &count);
+@endcode
+
+Each element in the returned array is one of the following:
+
+Name                  | Value
+----                  | -----
+`GLFW_HAT_CENTERED`   | 0
+`GLFW_HAT_UP`         | 1
+`GLFW_HAT_RIGHT`      | 2
+`GLFW_HAT_DOWN`       | 4
+`GLFW_HAT_LEFT`       | 8
+`GLFW_HAT_RIGHT_UP`   | `GLFW_HAT_RIGHT` \| `GLFW_HAT_UP`
+`GLFW_HAT_RIGHT_DOWN` | `GLFW_HAT_RIGHT` \| `GLFW_HAT_DOWN`
+`GLFW_HAT_LEFT_UP`    | `GLFW_HAT_LEFT` \| `GLFW_HAT_UP`
+`GLFW_HAT_LEFT_DOWN`  | `GLFW_HAT_LEFT` \| `GLFW_HAT_DOWN`
+
+The diagonal directions are bitwise combinations of the primary (up, right, down
+and left) directions and you can test for these individually by ANDing it with
+the corresponding direction.
+
+@code
+if (hats[2] & GLFW_HAT_RIGHT)
+{
+    // State of hat 2 could be right-up, right or right-down
+}
+@endcode
+
+For backward compatibility with earlier versions that did not have @ref
+glfwGetJoystickHats, all hats are by default also included in the button array.
+See the reference documentation for @ref glfwGetJoystickButtons for details.
+
+
+@subsection joystick_name Joystick name
+
+The human-readable, UTF-8 encoded name of a joystick is returned by @ref
+glfwGetJoystickName.  See the reference documentation for the lifetime of the
+returned string.
+
+@code
+const char* name = glfwGetJoystickName(GLFW_JOYSTICK_4);
+@endcode
+
+Joystick names are not guaranteed to be unique.  Two joysticks of the same model
+and make may have the same name.  Only the [joystick ID](@ref joysticks) is
+guaranteed to be unique, and only until that joystick is disconnected.
+
+
+@subsection joystick_userptr Joystick user pointer
+
+Each joystick has a user pointer that can be set with @ref
+glfwSetJoystickUserPointer and queried with @ref glfwGetJoystickUserPointer.
+This can be used for any purpose you need and will not be modified by GLFW.  The
+value will be kept until the joystick is disconnected or until the library is
+terminated.
+
+The initial value of the pointer is `NULL`.
+
+
+@subsection joystick_event Joystick configuration changes
+
+If you wish to be notified when a joystick is connected or disconnected, set
+a joystick callback.
+
+@code
+glfwSetJoystickCallback(joystick_callback);
+@endcode
+
+The callback function receives the ID of the joystick that has been connected
+and disconnected and the event that occurred.
+
+@code
+void joystick_callback(int jid, int event)
+{
+    if (event == GLFW_CONNECTED)
+    {
+        // The joystick was connected
+    }
+    else if (event == GLFW_DISCONNECTED)
+    {
+        // The joystick was disconnected
+    }
+}
+@endcode
+
+For joystick connection and disconnection events to be delivered on all
+platforms, you need to call one of the [event processing](@ref events)
+functions.  Joystick disconnection may also be detected and the callback
+called by joystick functions.  The function will then return whatever it
+returns for a disconnected joystick.
+
+Only @ref glfwGetJoystickName and @ref glfwGetJoystickUserPointer will return
+useful values for a disconnected joystick and only before the monitor callback
+returns.
+
+
+@subsection gamepad Gamepad input
+
+The joystick functions provide unlabeled axes, buttons and hats, with no
+indication of where they are located on the device.  Their order may also vary
+between platforms even with the same device.
+
+To solve this problem the SDL community crowdsourced the
+[SDL_GameControllerDB](https://github.com/gabomdq/SDL_GameControllerDB) project,
+a database of mappings from many different devices to an Xbox-like gamepad.
+
+GLFW supports this mapping format and contains a copy of the mappings
+available at the time of release.  See @ref gamepad_mapping for how to update
+this at runtime.  Mappings will be assigned to joysticks automatically any time
+a joystick is connected or the mappings are updated.
+
+You can check whether a joystick is both present and has a gamepad mapping with
+@ref glfwJoystickIsGamepad.
+
+@code
+if (glfwJoystickIsGamepad(GLFW_JOYSTICK_2))
+{
+    // Use as gamepad
+}
+@endcode
+
+If you are only interested in gamepad input you can use this function instead of
+@ref glfwJoystickPresent.
+
+You can query the human-readable name provided by the gamepad mapping with @ref
+glfwGetGamepadName.  This may or may not be the same as the
+[joystick name](@ref joystick_name).
+
+@code
+const char* name = glfwGetGamepadName(GLFW_JOYSTICK_7);
+@endcode
+
+To retrieve the gamepad state of a joystick, call @ref glfwGetGamepadState.
+
+@code
+GLFWgamepadstate state;
+
+if (glfwGetGamepadState(GLFW_JOYSTICK_3, &state))
+{
+    if (state.buttons[GLFW_GAMEPAD_BUTTON_A])
+    {
+        input_jump();
+    }
+
+    input_speed(state.axes[GLFW_GAMEPAD_AXIS_RIGHT_TRIGGER]);
+}
+@endcode
+
+The @ref GLFWgamepadstate struct has two arrays; one for button states and one
+for axis states.  The values for each button and axis are the same as for the
+@ref glfwGetJoystickButtons and @ref glfwGetJoystickAxes functions, i.e.
+`GLFW_PRESS` or `GLFW_RELEASE` for buttons and -1.0 to 1.0 inclusive for axes.
+
+The sizes of the arrays and the positions within each array are fixed.
+
+The [button indices](@ref gamepad_buttons) are `GLFW_GAMEPAD_BUTTON_A`,
+`GLFW_GAMEPAD_BUTTON_B`, `GLFW_GAMEPAD_BUTTON_X`, `GLFW_GAMEPAD_BUTTON_Y`,
+`GLFW_GAMEPAD_BUTTON_LEFT_BUMPER`, `GLFW_GAMEPAD_BUTTON_RIGHT_BUMPER`,
+`GLFW_GAMEPAD_BUTTON_BACK`, `GLFW_GAMEPAD_BUTTON_START`,
+`GLFW_GAMEPAD_BUTTON_GUIDE`, `GLFW_GAMEPAD_BUTTON_LEFT_THUMB`,
+`GLFW_GAMEPAD_BUTTON_RIGHT_THUMB`, `GLFW_GAMEPAD_BUTTON_DPAD_UP`,
+`GLFW_GAMEPAD_BUTTON_DPAD_RIGHT`, `GLFW_GAMEPAD_BUTTON_DPAD_DOWN` and
+`GLFW_GAMEPAD_BUTTON_DPAD_LEFT`.
+
+For those who prefer, there are also the `GLFW_GAMEPAD_BUTTON_CROSS`,
+`GLFW_GAMEPAD_BUTTON_CIRCLE`, `GLFW_GAMEPAD_BUTTON_SQUARE` and
+`GLFW_GAMEPAD_BUTTON_TRIANGLE` aliases for the A, B, X and Y button indices.
+
+The [axis indices](@ref gamepad_axes) are `GLFW_GAMEPAD_AXIS_LEFT_X`,
+`GLFW_GAMEPAD_AXIS_LEFT_Y`, `GLFW_GAMEPAD_AXIS_RIGHT_X`,
+`GLFW_GAMEPAD_AXIS_RIGHT_Y`, `GLFW_GAMEPAD_AXIS_LEFT_TRIGGER` and
+`GLFW_GAMEPAD_AXIS_RIGHT_TRIGGER`.
+
+The `GLFW_GAMEPAD_BUTTON_LAST` and `GLFW_GAMEPAD_AXIS_LAST` constants equal
+the largest available index for each array.
+
+
+@subsection gamepad_mapping Gamepad mappings
+
+GLFW contains a copy of the mappings available in
+[SDL_GameControllerDB](https://github.com/gabomdq/SDL_GameControllerDB) at the
+time of release.  Newer ones can be added at runtime with @ref
+glfwUpdateGamepadMappings.
+
+@code
+const char* mappings = load_file_contents("game/data/gamecontrollerdb.txt");
+
+glfwUpdateGamepadMappings(mappings);
+@endcode
+
+This function supports everything from single lines up to and including the
+unmodified contents of the whole `gamecontrollerdb.txt` file.
+
+If you are compiling GLFW from source with CMake you can update the built-in mappings by
+building the _update_mappings_ target.  This runs the `GenerateMappings.cmake` CMake
+script, which downloads `gamecontrollerdb.txt` and regenerates the `mappings.h` header
+file.
+
+Below is a description of the mapping format.  Please keep in mind that __this
+description is not authoritative__.  The format is defined by the SDL and
+SDL_GameControllerDB projects and their documentation and code takes precedence.
+
+Each mapping is a single line of comma-separated values describing the GUID,
+name and layout of the gamepad.  Lines that do not begin with a hexadecimal
+digit are ignored.
+
+The first value is always the gamepad GUID, a 32 character long hexadecimal
+string that typically identifies its make, model, revision and the type of
+connection to the computer.  When this information is not available, the GUID is
+generated using the gamepad name.  GLFW uses the SDL 2.0.5+ GUID format but can
+convert from the older formats.
+
+The second value is always the human-readable name of the gamepad.
+
+All subsequent values are in the form `<field>:<value>` and describe the layout
+of the mapping.  These fields may not all be present and may occur in any order.
+
+The button fields are `a`, `b`, `c`, `d`, `back`, `start`, `guide`, `dpup`,
+`dpright`, `dpdown`, `dpleft`, `leftshoulder`, `rightshoulder`, `leftstick` and
+`rightstick`.
+
+The axis fields are `leftx`, `lefty`, `rightx`, `righty`, `lefttrigger` and
+`righttrigger`.
+
+The value of an axis or button field can be a joystick button, a joystick axis,
+a hat bitmask or empty.  Joystick buttons are specified as `bN`, for example
+`b2` for the third button.  Joystick axes are specified as `aN`, for example
+`a7` for the eighth button.  Joystick hat bit masks are specified as `hN.N`, for
+example `h0.8` for left on the first hat.  More than one bit may be set in the
+mask.
+
+Before an axis there may be a `+` or `-` range modifier, for example `+a3` for
+the positive half of the fourth axis.  This restricts input to only the positive
+or negative halves of the joystick axis.  After an axis or half-axis there may
+be the `~` inversion modifier, for example `a2~` or `-a7~`.  This negates the
+values of the gamepad axis.
+
+The hat bit mask match the [hat states](@ref hat_state) in the joystick
+functions.
+
+There is also the special `platform` field that specifies which platform the
+mapping is valid for.  Possible values are `Windows`, `Mac OS X` and `Linux`.
+
+Below is an example of what a gamepad mapping might look like.  It is the
+one built into GLFW for Xbox controllers accessed via the XInput API on Windows.
+This example has been broken into several lines to fit on the page, but real
+gamepad mappings must be a single line.
+
+@code{.unparsed}
+78696e70757401000000000000000000,XInput Gamepad (GLFW),platform:Windows,a:b0,
+b:b1,x:b2,y:b3,leftshoulder:b4,rightshoulder:b5,back:b6,start:b7,leftstick:b8,
+rightstick:b9,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:a4,
+righttrigger:a5,dpup:h0.1,dpright:h0.2,dpdown:h0.4,dpleft:h0.8,
+@endcode
+
+@note GLFW does not yet support the output range and modifiers `+` and `-` that
+were recently added to SDL.  The input modifiers `+`, `-` and `~` are supported
+and described above.
+
+
+@section time Time input
+
+GLFW provides high-resolution time input, in seconds, with @ref glfwGetTime.
+
+@code
+double seconds = glfwGetTime();
+@endcode
+
+It returns the number of seconds since the library was initialized with @ref
+glfwInit.  The platform-specific time sources used typically have micro- or
+nanosecond resolution.
+
+You can modify the base time with @ref glfwSetTime.
+
+@code
+glfwSetTime(4.0);
+@endcode
+
+This sets the time to the specified time, in seconds, and it continues to count
+from there.
+
+You can also access the raw timer used to implement the functions above,
+with @ref glfwGetTimerValue.
+
+@code
+uint64_t value = glfwGetTimerValue();
+@endcode
+
+This value is in 1&nbsp;/&nbsp;frequency seconds.  The frequency of the raw
+timer varies depending on the operating system and hardware.  You can query the
+frequency, in Hz, with @ref glfwGetTimerFrequency.
+
+@code
+uint64_t frequency = glfwGetTimerFrequency();
+@endcode
+
+
+@section clipboard Clipboard input and output
+
+If the system clipboard contains a UTF-8 encoded string or if it can be
+converted to one, you can retrieve it with @ref glfwGetClipboardString.  See the
+reference documentation for the lifetime of the returned string.
+
+@code
+const char* text = glfwGetClipboardString(NULL);
+if (text)
+{
+    insert_text(text);
+}
+@endcode
+
+If the clipboard is empty or if its contents could not be converted, `NULL` is
+returned.
+
+The contents of the system clipboard can be set to a UTF-8 encoded string with
+@ref glfwSetClipboardString.
+
+@code
+glfwSetClipboardString(NULL, "A string with words in it");
+@endcode
+
+
+@section path_drop Path drop input
+
+If you wish to receive the paths of files and/or directories dropped on
+a window, set a file drop callback.
+
+@code
+glfwSetDropCallback(window, drop_callback);
+@endcode
+
+The callback function receives an array of paths encoded as UTF-8.
+
+@code
+void drop_callback(GLFWwindow* window, int count, const char** paths)
+{
+    int i;
+    for (i = 0;  i < count;  i++)
+        handle_dropped_file(paths[i]);
+}
+@endcode
+
+The path array and its strings are only valid until the file drop callback
+returns, as they may have been generated specifically for that event.  You need
+to make a deep copy of the array if you want to keep the paths.
+
+*/

src/ThirdParty/glfw/docs/internal.dox

@@ -0,0 +1,123 @@
+/*!
+
+@page internals_guide Internal structure
+
+@tableofcontents
+
+There are several interfaces inside GLFW.  Each interface has its own area of
+responsibility and its own naming conventions.
+
+
+@section internals_public Public interface
+
+The most well-known is the public interface, described in the glfw3.h header
+file.  This is implemented in source files shared by all platforms and these
+files contain no platform-specific code.  This code usually ends up calling the
+platform and internal interfaces to do the actual work.
+
+The public interface uses the OpenGL naming conventions except with GLFW and
+glfw instead of GL and gl.  For struct members, where OpenGL sets no precedent,
+it use headless camel case.
+
+Examples: `glfwCreateWindow`, `GLFWwindow`, `GLFW_RED_BITS`
+
+
+@section internals_native Native interface
+
+The [native interface](@ref native) is a small set of publicly available
+but platform-specific functions, described in the glfw3native.h header file and
+used to gain access to the underlying window, context and (on some platforms)
+display handles used by the platform interface.
+
+The function names of the native interface are similar to those of the public
+interface, but embeds the name of the interface that the returned handle is
+from.
+
+Examples: `glfwGetX11Window`, `glfwGetWGLContext`
+
+
+@section internals_internal Internal interface
+
+The internal interface consists of utility functions used by all other
+interfaces.  It is shared code implemented in the same shared source files as
+the public and event interfaces.  The internal interface is described in the
+internal.h header file.
+
+The internal interface is in charge of GLFW's global data, which it stores in
+a `_GLFWlibrary` struct named `_glfw`.
+
+The internal interface uses the same style as the public interface, except all
+global names have a leading underscore.
+
+Examples: `_glfwIsValidContextConfig`, `_GLFWwindow`, `_glfw.monitorCount`
+
+
+@section internals_platform Platform interface
+
+The platform interface implements all platform-specific operations as a service
+to the public interface.  This includes event processing.  The platform
+interface is never directly called by application code and never directly calls
+application-provided callbacks.  It is also prohibited from modifying the
+platform-independent part of the internal structs.  Instead, it calls the event
+interface when events interesting to GLFW are received.
+
+The platform interface mostly mirrors those parts of the public interface that needs to
+perform platform-specific operations on some or all platforms.
+
+The window system bits of the platform API is called through the `_GLFWplatform` struct of
+function pointers, to allow runtime selection of platform.  This includes the window and
+context creation, input and event processing, monitor and Vulkan surface creation parts of
+GLFW.  This is located in the global `_glfw` struct.
+
+Examples: `_glfw.platform.createWindow`
+
+The timer, threading and module loading bits of the platform API are plain functions with
+a `_glfwPlatform` prefix, as these things are independent of what window system is being
+used.
+
+Examples: `_glfwPlatformGetTimerValue`
+
+The platform interface also defines structs that contain platform-specific
+global and per-object state.  Their names mirror those of the internal
+interface, except that an interface-specific suffix is added.
+
+Examples: `_GLFWwindowX11`, `_GLFWcontextWGL`
+
+These structs are incorporated as members into the internal interface structs
+using special macros that name them after the specific interface used.  This
+prevents shared code from accidentally using these members.
+
+Examples: `window->win32.handle`, `_glfw.x11.display`
+
+
+@section internals_event Event interface
+
+The event interface is implemented in the same shared source files as the public
+interface and is responsible for delivering the events it receives to the
+application, either via callbacks, via window state changes or both.
+
+The function names of the event interface use a `_glfwInput` prefix and the
+ObjectEvent pattern.
+
+Examples: `_glfwInputWindowFocus`, `_glfwInputCursorPos`
+
+
+@section internals_static Static functions
+
+Static functions may be used by any interface and have no prefixes or suffixes.
+These use headless camel case.
+
+Examples: `isValidElementForJoystick`
+
+
+@section internals_config Configuration macros
+
+GLFW uses a number of configuration macros to select at compile time which
+interfaces and code paths to use.  They are defined in the GLFW CMake target.
+
+Configuration macros the same style as tokens in the public interface, except
+with a leading underscore.
+
+Examples: `_GLFW_WIN32`, `_GLFW_BUILD_DLL`
+
+*/

src/ThirdParty/glfw/docs/intro.dox

@@ -0,0 +1,619 @@
+/*!
+
+@page intro_guide Introduction to the API
+
+@tableofcontents
+
+This guide introduces the basic concepts of GLFW and describes initialization,
+error handling and API guarantees and limitations.  For a broad but shallow
+tutorial, see @ref quick_guide instead.  For details on a specific function in
+this category, see the @ref init.
+
+There are also guides for the other areas of GLFW.
+
+ - @ref window_guide
+ - @ref context_guide
+ - @ref vulkan_guide
+ - @ref monitor_guide
+ - @ref input_guide
+
+
+@section intro_init Initialization and termination
+
+Before most GLFW functions may be called, the library must be initialized.
+This initialization checks what features are available on the machine,
+enumerates monitors, initializes the timer and performs any required
+platform-specific initialization.
+
+Only the following functions may be called before the library has been
+successfully initialized, and only from the main thread.
+
+ - @ref glfwGetVersion
+ - @ref glfwGetVersionString
+ - @ref glfwPlatformSupported
+ - @ref glfwGetError
+ - @ref glfwSetErrorCallback
+ - @ref glfwInitHint
+ - @ref glfwInitAllocator
+ - @ref glfwInitVulkanLoader
+ - @ref glfwInit
+ - @ref glfwTerminate
+
+Calling any other function before successful initialization will cause a @ref
+GLFW_NOT_INITIALIZED error.
+
+
+@subsection intro_init_init Initializing GLFW
+
+The library is initialized with @ref glfwInit, which returns `GLFW_FALSE` if an
+error occurred.
+
+@code
+if (!glfwInit())
+{
+    // Handle initialization failure
+}
+@endcode
+
+If any part of initialization fails, any parts that succeeded are terminated as
+if @ref glfwTerminate had been called.  The library only needs to be initialized
+once and additional calls to an already initialized library will return
+`GLFW_TRUE` immediately.
+
+Once the library has been successfully initialized, it should be terminated
+before the application exits.  Modern systems are very good at freeing resources
+allocated by programs that exit, but GLFW sometimes has to change global system
+settings and these might not be restored without termination.
+
+@macos When the library is initialized the main menu and dock icon are created.
+These are not desirable for a command-line only program.  The creation of the
+main menu and dock icon can be disabled with the @ref GLFW_COCOA_MENUBAR init
+hint.
+
+
+@subsection init_hints Initialization hints
+
+Initialization hints are set before @ref glfwInit and affect how the library
+behaves until termination.  Hints are set with @ref glfwInitHint.
+
+@code
+glfwInitHint(GLFW_JOYSTICK_HAT_BUTTONS, GLFW_FALSE);
+@endcode
+
+The values you set hints to are never reset by GLFW, but they only take effect
+during initialization.  Once GLFW has been initialized, any values you set will
+be ignored until the library is terminated and initialized again.
+
+Some hints are platform specific.  These may be set on any platform but they
+will only affect their specific platform.  Other platforms will ignore them.
+Setting these hints requires no platform specific headers or functions.
+
+
+@subsubsection init_hints_shared Shared init hints
+
+@anchor GLFW_PLATFORM
+__GLFW_PLATFORM__ specifies the platform to use for windowing and input.
+Possible values are `GLFW_ANY_PLATFORM`, `GLFW_PLATFORM_WIN32`,
+`GLFW_PLATFORM_COCOA`, `GLFW_PLATFORM_X11`, `GLFW_PLATFORM_WAYLAND` and
+`GLFW_PLATFORM_NULL`.  The default value is `GLFW_ANY_PLATFORM`, which will
+choose any platform the library includes support for except for the Null
+backend.
+
+
+@anchor GLFW_JOYSTICK_HAT_BUTTONS
+__GLFW_JOYSTICK_HAT_BUTTONS__ specifies whether to also expose joystick hats as
+buttons, for compatibility with earlier versions of GLFW that did not have @ref
+glfwGetJoystickHats.  Possible values are `GLFW_TRUE` and `GLFW_FALSE`.
+
+@anchor GLFW_ANGLE_PLATFORM_TYPE_hint
+__GLFW_ANGLE_PLATFORM_TYPE__ specifies the platform type (rendering backend) to
+request when using OpenGL ES and EGL via
+[ANGLE](https://chromium.googlesource.com/angle/angle/).  If the requested
+platform type is unavailable, ANGLE will use its default. Possible values are
+one of `GLFW_ANGLE_PLATFORM_TYPE_NONE`, `GLFW_ANGLE_PLATFORM_TYPE_OPENGL`,
+`GLFW_ANGLE_PLATFORM_TYPE_OPENGLES`, `GLFW_ANGLE_PLATFORM_TYPE_D3D9`,
+`GLFW_ANGLE_PLATFORM_TYPE_D3D11`, `GLFW_ANGLE_PLATFORM_TYPE_VULKAN` and
+`GLFW_ANGLE_PLATFORM_TYPE_METAL`.
+
+The ANGLE platform type is specified via the `EGL_ANGLE_platform_angle`
+extension.  This extension is not used if this hint is
+`GLFW_ANGLE_PLATFORM_TYPE_NONE`, which is the default value.
+
+
+@subsubsection init_hints_osx macOS specific init hints
+
+@anchor GLFW_COCOA_CHDIR_RESOURCES_hint
+__GLFW_COCOA_CHDIR_RESOURCES__ specifies whether to set the current directory to
+the application to the `Contents/Resources` subdirectory of the application's
+bundle, if present.  Possible values are `GLFW_TRUE` and `GLFW_FALSE`.  This is
+ignored on other platforms.
+
+@anchor GLFW_COCOA_MENUBAR_hint
+__GLFW_COCOA_MENUBAR__ specifies whether to create the menu bar and dock icon
+when GLFW is initialized.  This applies whether the menu bar is created from
+a nib or manually by GLFW.  Possible values are `GLFW_TRUE` and `GLFW_FALSE`.
+This is ignored on other platforms.
+
+
+@subsubsection init_hints_x11 X11 specific init hints
+
+@anchor GLFW_X11_XCB_VULKAN_SURFACE_hint
+__GLFW_X11_XCB_VULKAN_SURFACE__ specifies whether to prefer the
+`VK_KHR_xcb_surface` extension for creating Vulkan surfaces, or whether to use
+the `VK_KHR_xlib_surface` extension.  Possible values are `GLFW_TRUE` and
+`GLFW_FALSE`.  This is ignored on other platforms.
+
+
+@subsubsection init_hints_values Supported and default values
+
+Initialization hint              | Default value                   | Supported values
+-------------------------------- | ------------------------------- | ----------------
+@ref GLFW_PLATFORM               | `GLFW_ANY_PLATFORM`             | `GLFW_ANY_PLATFORM`, `GLFW_PLATFORM_WIN32`, `GLFW_PLATFORM_COCOA`, `GLFW_PLATFORM_X11`, `GLFW_PLATFORM_WAYLAND` or `GLFW_PLATFORM_NULL`
+@ref GLFW_JOYSTICK_HAT_BUTTONS   | `GLFW_TRUE`                     | `GLFW_TRUE` or `GLFW_FALSE`
+@ref GLFW_ANGLE_PLATFORM_TYPE    | `GLFW_ANGLE_PLATFORM_TYPE_NONE` | `GLFW_ANGLE_PLATFORM_TYPE_NONE`, `GLFW_ANGLE_PLATFORM_TYPE_OPENGL`, `GLFW_ANGLE_PLATFORM_TYPE_OPENGLES`, `GLFW_ANGLE_PLATFORM_TYPE_D3D9`, `GLFW_ANGLE_PLATFORM_TYPE_D3D11`, `GLFW_ANGLE_PLATFORM_TYPE_VULKAN` or `GLFW_ANGLE_PLATFORM_TYPE_METAL`
+@ref GLFW_COCOA_CHDIR_RESOURCES  | `GLFW_TRUE`                     | `GLFW_TRUE` or `GLFW_FALSE`
+@ref GLFW_COCOA_MENUBAR          | `GLFW_TRUE`                     | `GLFW_TRUE` or `GLFW_FALSE`
+@ref GLFW_X11_XCB_VULKAN_SURFACE | `GLFW_TRUE`                     | `GLFW_TRUE` or `GLFW_FALSE`
+
+
+@subsection platform Runtime platform selection
+
+GLFW can be compiled for more than one platform (window system) at once.  This lets
+a single library binary support both X11 and Wayland on Linux and other Unix-like systems.
+
+You can control platform selection via the @ref GLFW_PLATFORM initialization hint.  By
+default this is set to @ref GLFW_ANY_PLATFORM, which will look for supported window
+systems in order of priority and select the first one it finds.  It can also be set to any
+specific platform to have GLFW only look for that one.
+
+@code
+glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_X11);
+@endcode
+
+This mechanism also provides the Null platform, which is always supported but needs to be
+explicitly requested.  This platform is effectively a stub, emulating a window system on
+a single 1080p monitor, but will not interact with any actual window system.
+
+@code
+glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_NULL);
+@endcode
+
+You can test whether a library binary was compiled with support for a specific platform
+with @ref glfwPlatformSupported.
+
+@code
+if (glfwPlatformSupported(GLFW_PLATFORM_WAYLAND))
+    glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_WAYLAND);
+@endcode
+
+Once GLFW has been initialized, you can query which platform was selected with @ref
+glfwGetPlatform.
+
+@code
+int platform = glfwGetPlatform();
+@endcode
+
+If you are using any [native access functions](@ref native), especially on Linux and other
+Unix-like systems, then you may need to check that you are calling the ones matching the
+selected platform.
+
+
+@subsection init_allocator Custom heap memory allocator
+
+The heap memory allocator can be customized before initialization with @ref
+glfwInitAllocator.
+
+@code
+GLFWallocator allocator;
+allocator.allocate = my_malloc;
+allocator.reallocate = my_realloc;
+allocator.deallocate = my_free;
+allocator.user = NULL;
+
+glfwInitAllocator(&allocator);
+@endcode
+
+The allocator will be picked up at the beginning of initialization and will be
+used until GLFW has been fully terminated.  Any allocator set after
+initialization will be picked up only at the next initialization.
+
+The allocator will only be used for allocations that would have been made with
+the C standard library.  Memory allocations that must be made with platform
+specific APIs will still use those.
+
+The allocation function must have a signature matching @ref GLFWallocatefun.  It receives
+the desired size, in bytes, and the user pointer passed to @ref glfwInitAllocator and
+returns the address to the allocated memory block.
+
+@code
+void* my_malloc(size_t size, void* user)
+{
+    ...
+}
+@endcode
+
+The reallocation function must have a function signature matching @ref GLFWreallocatefun.
+It receives the memory block to be reallocated, the new desired size, in bytes, and the user
+pointer passed to @ref glfwInitAllocator and returns the address to the resized memory
+block.
+
+@code
+void* my_realloc(void* block, size_t size, void* user)
+{
+    ...
+}
+@endcode
+
+The deallocation function must have a function signature matching @ref GLFWdeallocatefun.
+It receives the memory block to be deallocated and the user pointer passed to @ref
+glfwInitAllocator.
+
+@code
+void my_free(void* block, void* user)
+{
+    ...
+}
+@endcode
+
+
+@subsection intro_init_terminate Terminating GLFW
+
+Before your application exits, you should terminate the GLFW library if it has
+been initialized.  This is done with @ref glfwTerminate.
+
+@code
+glfwTerminate();
+@endcode
+
+This will destroy any remaining window, monitor and cursor objects, restore any
+modified gamma ramps, re-enable the screensaver if it had been disabled and free
+any other resources allocated by GLFW.
+
+Once the library is terminated, it is as if it had never been initialized and
+you will need to initialize it again before being able to use GLFW.  If the
+library was not initialized or had already been terminated, it return
+immediately.
+
+
+@section error_handling Error handling
+
+Some GLFW functions have return values that indicate an error, but this is often
+not very helpful when trying to figure out what happened or why it occurred.
+Other functions have no return value reserved for errors, so error notification
+needs a separate channel.  Finally, far from all GLFW functions have return
+values.
+
+The last [error code](@ref errors) for the calling thread can be queried at any
+time with @ref glfwGetError.
+
+@code
+int code = glfwGetError(NULL);
+
+if (code != GLFW_NO_ERROR)
+    handle_error(code);
+@endcode
+
+If no error has occurred since the last call, @ref GLFW_NO_ERROR (zero) is
+returned.  The error is cleared before the function returns.
+
+The error code indicates the general category of the error.  Some error codes,
+such as @ref GLFW_NOT_INITIALIZED has only a single meaning, whereas others like
+@ref GLFW_PLATFORM_ERROR are used for many different errors.
+
+GLFW often has more information about an error than its general category.  You
+can retrieve a UTF-8 encoded human-readable description along with the error
+code.  If no error has occurred since the last call, the description is set to
+`NULL`.
+
+@code
+const char* description;
+int code = glfwGetError(&description);
+
+if (description)
+    display_error_message(code, description);
+@endcode
+
+The retrieved description string is only valid until the next error occurs.
+This means you must make a copy of it if you want to keep it.
+
+You can also set an error callback, which will be called each time an error
+occurs.  It is set with @ref glfwSetErrorCallback.
+
+@code
+glfwSetErrorCallback(error_callback);
+@endcode
+
+The error callback receives the same error code and human-readable description
+returned by @ref glfwGetError.
+
+@code
+void error_callback(int code, const char* description)
+{
+    display_error_message(code, description);
+}
+@endcode
+
+The error callback is called after the error is stored, so calling @ref
+glfwGetError from within the error callback returns the same values as the
+callback argument.
+
+The description string passed to the callback is only valid until the error
+callback returns.  This means you must make a copy of it if you want to keep it.
+
+__Reported errors are never fatal.__  As long as GLFW was successfully
+initialized, it will remain initialized and in a safe state until terminated
+regardless of how many errors occur.  If an error occurs during initialization
+that causes @ref glfwInit to fail, any part of the library that was initialized
+will be safely terminated.
+
+Do not rely on a currently invalid call to generate a specific error, as in the
+future that same call may generate a different error or become valid.
+
+
+@section coordinate_systems Coordinate systems
+
+GLFW has two primary coordinate systems: the _virtual screen_ and the window
+_content area_ or _content area_.  Both use the same unit: _virtual screen
+coordinates_, or just _screen coordinates_, which don't necessarily correspond
+to pixels.
+
+<img src="spaces.svg" width="90%" />
+
+Both the virtual screen and the content area coordinate systems have the X-axis
+pointing to the right and the Y-axis pointing down.
+
+Window and monitor positions are specified as the position of the upper-left
+corners of their content areas relative to the virtual screen, while cursor
+positions are specified relative to a window's content area.
+
+Because the origin of the window's content area coordinate system is also the
+point from which the window position is specified, you can translate content
+area coordinates to the virtual screen by adding the window position.  The
+window frame, when present, extends out from the content area but does not
+affect the window position.
+
+Almost all positions and sizes in GLFW are measured in screen coordinates
+relative to one of the two origins above.  This includes cursor positions,
+window positions and sizes, window frame sizes, monitor positions and video mode
+resolutions.
+
+Two exceptions are the [monitor physical size](@ref monitor_size), which is
+measured in millimetres, and [framebuffer size](@ref window_fbsize), which is
+measured in pixels.
+
+Pixels and screen coordinates may map 1:1 on your machine, but they won't on
+every other machine, for example on a Mac with a Retina display.  The ratio
+between screen coordinates and pixels may also change at run-time depending on
+which monitor the window is currently considered to be on.
+
+
+@section guarantees_limitations Guarantees and limitations
+
+This section describes the conditions under which GLFW can be expected to
+function, barring bugs in the operating system or drivers.  Use of GLFW outside
+of these limits may work on some platforms, or on some machines, or some of the
+time, or on some versions of GLFW, but it may break at any time and this will
+not be considered a bug.
+
+
+@subsection lifetime Pointer lifetimes
+
+GLFW will never free any pointer you provide to it and you must never free any
+pointer it provides to you.
+
+Many GLFW functions return pointers to dynamically allocated structures, strings
+or arrays, and some callbacks are provided with strings or arrays.  These are
+always managed by GLFW and should never be freed by the application.  The
+lifetime of these pointers is documented for each GLFW function and callback.
+If you need to keep this data, you must copy it before its lifetime expires.
+
+Many GLFW functions accept pointers to structures or strings allocated by the
+application.  These are never freed by GLFW and are always the responsibility of
+the application.  If GLFW needs to keep the data in these structures or strings,
+it is copied before the function returns.
+
+Pointer lifetimes are guaranteed not to be shortened in future minor or patch
+releases.
+
+
+@subsection reentrancy Reentrancy
+
+GLFW event processing and object destruction are not reentrant.  This means that
+the following functions must not be called from any callback function:
+
+ - @ref glfwDestroyWindow
+ - @ref glfwDestroyCursor
+ - @ref glfwPollEvents
+ - @ref glfwWaitEvents
+ - @ref glfwWaitEventsTimeout
+ - @ref glfwTerminate
+
+These functions may be made reentrant in future minor or patch releases, but
+functions not on this list will not be made non-reentrant.
+
+
+@subsection thread_safety Thread safety
+
+Most GLFW functions must only be called from the main thread (the thread that
+calls main), but some may be called from any thread once the library has been
+initialized.  Before initialization the whole library is thread-unsafe.
+
+The reference documentation for every GLFW function states whether it is limited
+to the main thread.
+
+Initialization, termination, event processing and the creation and
+destruction of windows, cursors and OpenGL and OpenGL ES contexts are all
+restricted to the main thread due to limitations of one or several platforms.
+
+Because event processing must be performed on the main thread, all callbacks
+except for the error callback will only be called on that thread.  The error
+callback may be called on any thread, as any GLFW function may generate errors.
+
+The error code and description may be queried from any thread.
+
+ - @ref glfwGetError
+
+Empty events may be posted from any thread.
+
+ - @ref glfwPostEmptyEvent
+
+The window user pointer and close flag may be read and written from any thread,
+but this is not synchronized by GLFW.
+
+ - @ref glfwGetWindowUserPointer
+ - @ref glfwSetWindowUserPointer
+ - @ref glfwWindowShouldClose
+ - @ref glfwSetWindowShouldClose
+
+These functions for working with OpenGL and OpenGL ES contexts may be called
+from any thread, but the window object is not synchronized by GLFW.
+
+ - @ref glfwMakeContextCurrent
+ - @ref glfwGetCurrentContext
+ - @ref glfwSwapBuffers
+ - @ref glfwSwapInterval
+ - @ref glfwExtensionSupported
+ - @ref glfwGetProcAddress
+
+The raw timer functions may be called from any thread.
+
+ - @ref glfwGetTimerFrequency
+ - @ref glfwGetTimerValue
+
+The regular timer may be used from any thread, but reading and writing the timer
+offset is not synchronized by GLFW.
+
+ - @ref glfwGetTime
+ - @ref glfwSetTime
+
+Library version information may be queried from any thread.
+
+ - @ref glfwGetVersion
+ - @ref glfwGetVersionString
+
+Platform information may be queried from any thread.
+
+ - @ref glfwPlatformSupported
+ - @ref glfwGetPlatform
+
+All Vulkan related functions may be called from any thread.
+
+ - @ref glfwVulkanSupported
+ - @ref glfwGetRequiredInstanceExtensions
+ - @ref glfwGetInstanceProcAddress
+ - @ref glfwGetPhysicalDevicePresentationSupport
+ - @ref glfwCreateWindowSurface
+
+GLFW uses synchronization objects internally only to manage the per-thread
+context and error states.  Additional synchronization is left to the
+application.
+
+Functions that may currently be called from any thread will always remain so,
+but functions that are currently limited to the main thread may be updated to
+allow calls from any thread in future releases.
+
+
+@subsection compatibility Version compatibility
+
+GLFW uses [Semantic Versioning](https://semver.org/).  This guarantees source
+and binary backward compatibility with earlier minor versions of the API.  This
+means that you can drop in a newer version of the library and existing programs
+will continue to compile and existing binaries will continue to run.
+
+Once a function or constant has been added, the signature of that function or
+value of that constant will remain unchanged until the next major version of
+GLFW.  No compatibility of any kind is guaranteed between major versions.
+
+Undocumented behavior, i.e. behavior that is not described in the documentation,
+may change at any time until it is documented.
+
+If the reference documentation and the implementation differ, the reference
+documentation will almost always take precedence and the implementation will be
+fixed in the next release.  The reference documentation will also take
+precedence over anything stated in a guide.
+
+
+@subsection event_order Event order
+
+The order of arrival of related events is not guaranteed to be consistent
+across platforms.  The exception is synthetic key and mouse button release
+events, which are always delivered after the window defocus event.
+
+
+@section intro_version Version management
+
+GLFW provides mechanisms for identifying what version of GLFW your application
+was compiled against as well as what version it is currently running against.
+If you are loading GLFW dynamically (not just linking dynamically), you can use
+this to verify that the library binary is compatible with your application.
+
+
+@subsection intro_version_compile Compile-time version
+
+The compile-time version of GLFW is provided by the GLFW header with the
+`GLFW_VERSION_MAJOR`, `GLFW_VERSION_MINOR` and `GLFW_VERSION_REVISION` macros.
+
+@code
+printf("Compiled against GLFW %i.%i.%i\n",
+       GLFW_VERSION_MAJOR,
+       GLFW_VERSION_MINOR,
+       GLFW_VERSION_REVISION);
+@endcode
+
+
+@subsection intro_version_runtime Run-time version
+
+The run-time version can be retrieved with @ref glfwGetVersion, a function that
+may be called regardless of whether GLFW is initialized.
+
+@code
+int major, minor, revision;
+glfwGetVersion(&major, &minor, &revision);
+
+printf("Running against GLFW %i.%i.%i\n", major, minor, revision);
+@endcode
+
+
+@subsection intro_version_string Version string
+
+GLFW 3 also provides a compile-time generated version string that describes the
+version, platform, compiler and any platform-specific compile-time options.
+This is primarily intended for submitting bug reports, to allow developers to
+see which code paths are enabled in a binary.
+
+The version string is returned by @ref glfwGetVersionString, a function that may
+be called regardless of whether GLFW is initialized.
+
+__Do not use the version string__ to parse the GLFW library version.  The @ref
+glfwGetVersion function already provides the version of the running library
+binary.
+
+__Do not use the version string__ to parse what platforms are supported.  The @ref
+glfwPlatformSupported function lets you query platform support.
+
+__GLFW 3.4:__ The format of this string was changed to support the addition of
+[runtime platform selection](@ref platform).
+
+The format of the string is as follows:
+ - The version of GLFW
+ - For each supported platform:
+   - The name of the window system API
+   - The name of the window system specific context creation API, if applicable
+ - The names of the always supported context creation APIs EGL and OSMesa
+ - Any additional compile-time options, APIs and (on Windows) what compiler was used
+
+For example, GLFW 3.4 compiled as a DLL for Windows with MinGW may have a version string
+like this:
+
+@code
+3.4.0 Win32 WGL Null EGL OSMesa MinGW DLL
+@endcode
+
+While GLFW compiled as as static library for Linux with both Wayland and X11 enabled may
+have a version string like this:
+
+@code
+3.4.0 Wayland X11 GLX Null EGL OSMesa monotonic
+@endcode
+
+*/

src/ThirdParty/glfw/docs/main.dox

@@ -0,0 +1,46 @@
+/*!
+
+@mainpage notitle
+
+@section main_intro Introduction
+
+GLFW is a free, Open Source, multi-platform library for OpenGL, OpenGL ES and
+Vulkan application development.  It provides a simple, platform-independent API
+for creating windows, contexts and surfaces, reading input, handling events, etc.
+
+@ref news_34 list new features, caveats and deprecations.
+
+@ref quick_guide is a guide for users new to GLFW.  It takes you through how to
+write a small but complete program.
+
+There are guides for each section of the API:
+
+ - @ref intro_guide – initialization, error handling and high-level design
+ - @ref window_guide – creating and working with windows and framebuffers
+ - @ref context_guide – working with OpenGL and OpenGL ES contexts
+ - @ref vulkan_guide - working with Vulkan objects and extensions
+ - @ref monitor_guide – enumerating and working with monitors and video modes
+ - @ref input_guide – receiving events, polling and processing input
+
+Once you have written a program, see @ref compile_guide and @ref build_guide.
+
+The [reference documentation](modules.html) provides more detailed information
+about specific functions.
+
+@ref moving_guide explains what has changed and how to update existing code to
+use the new API.
+
+There is a section on @ref guarantees_limitations for pointer lifetimes,
+reentrancy, thread safety, event order and backward and forward compatibility.
+
+The [FAQ](https://www.glfw.org/faq.html) answers many common questions about the
+design, implementation and use of GLFW.
+
+Finally, @ref compat_guide explains what APIs, standards and protocols GLFW uses
+and what happens when they are not present on a given machine.
+
+This documentation was generated with Doxygen.  The sources for it are available
+in both the [source distribution](https://www.glfw.org/download.html) and
+[GitHub repository](https://github.com/glfw/glfw).
+
+*/

src/ThirdParty/glfw/docs/monitor.dox

@@ -0,0 +1,268 @@
+/*!
+
+@page monitor_guide Monitor guide
+
+@tableofcontents
+
+This guide introduces the monitor related functions of GLFW.  For details on
+a specific function in this category, see the @ref monitor.  There are also
+guides for the other areas of GLFW.
+
+ - @ref intro_guide
+ - @ref window_guide
+ - @ref context_guide
+ - @ref vulkan_guide
+ - @ref input_guide
+
+
+@section monitor_object Monitor objects
+
+A monitor object represents a currently connected monitor and is represented as
+a pointer to the [opaque](https://en.wikipedia.org/wiki/Opaque_data_type) type
+@ref GLFWmonitor.  Monitor objects cannot be created or destroyed by the
+application and retain their addresses until the monitors they represent are
+disconnected or until the library is [terminated](@ref intro_init_terminate).
+
+Each monitor has a current video mode, a list of supported video modes,
+a virtual position, a human-readable name, an estimated physical size and
+a gamma ramp.  One of the monitors is the primary monitor.
+
+The virtual position of a monitor is in
+[screen coordinates](@ref coordinate_systems) and, together with the current
+video mode, describes the viewports that the connected monitors provide into the
+virtual desktop that spans them.
+
+To see how GLFW views your monitor setup and its available video modes, run the
+`monitors` test program.
+
+
+@subsection monitor_monitors Retrieving monitors
+
+The primary monitor is returned by @ref glfwGetPrimaryMonitor.  It is the user's
+preferred monitor and is usually the one with global UI elements like task bar
+or menu bar.
+
+@code
+GLFWmonitor* primary = glfwGetPrimaryMonitor();
+@endcode
+
+You can retrieve all currently connected monitors with @ref glfwGetMonitors.
+See the reference documentation for the lifetime of the returned array.
+
+@code
+int count;
+GLFWmonitor** monitors = glfwGetMonitors(&count);
+@endcode
+
+The primary monitor is always the first monitor in the returned array, but other
+monitors may be moved to a different index when a monitor is connected or
+disconnected.
+
+
+@subsection monitor_event Monitor configuration changes
+
+If you wish to be notified when a monitor is connected or disconnected, set
+a monitor callback.
+
+@code
+glfwSetMonitorCallback(monitor_callback);
+@endcode
+
+The callback function receives the handle for the monitor that has been
+connected or disconnected and the event that occurred.
+
+@code
+void monitor_callback(GLFWmonitor* monitor, int event)
+{
+    if (event == GLFW_CONNECTED)
+    {
+        // The monitor was connected
+    }
+    else if (event == GLFW_DISCONNECTED)
+    {
+        // The monitor was disconnected
+    }
+}
+@endcode
+
+If a monitor is disconnected, all windows that are full screen on it will be
+switched to windowed mode before the callback is called.  Only @ref
+glfwGetMonitorName and @ref glfwGetMonitorUserPointer will return useful values
+for a disconnected monitor and only before the monitor callback returns.
+
+
+@section monitor_properties Monitor properties
+
+Each monitor has a current video mode, a list of supported video modes,
+a virtual position, a content scale, a human-readable name, a user pointer, an
+estimated physical size and a gamma ramp.
+
+
+@subsection monitor_modes Video modes
+
+GLFW generally does a good job selecting a suitable video mode when you create
+a full screen window, change its video mode or make a windowed one full
+screen, but it is sometimes useful to know exactly which video modes are
+supported.
+
+Video modes are represented as @ref GLFWvidmode structures.  You can get an
+array of the video modes supported by a monitor with @ref glfwGetVideoModes.
+See the reference documentation for the lifetime of the returned array.
+
+@code
+int count;
+GLFWvidmode* modes = glfwGetVideoModes(monitor, &count);
+@endcode
+
+To get the current video mode of a monitor call @ref glfwGetVideoMode.  See the
+reference documentation for the lifetime of the returned pointer.
+
+@code
+const GLFWvidmode* mode = glfwGetVideoMode(monitor);
+@endcode
+
+The resolution of a video mode is specified in
+[screen coordinates](@ref coordinate_systems), not pixels.
+
+
+@subsection monitor_size Physical size
+
+The physical size of a monitor in millimetres, or an estimation of it, can be
+retrieved with @ref glfwGetMonitorPhysicalSize.  This has no relation to its
+current _resolution_, i.e. the width and height of its current
+[video mode](@ref monitor_modes).
+
+@code
+int width_mm, height_mm;
+glfwGetMonitorPhysicalSize(monitor, &width_mm, &height_mm);
+@endcode
+
+While this can be used to calculate the raw DPI of a monitor, this is often not
+useful.  Instead use the [monitor content scale](@ref monitor_scale) and
+[window content scale](@ref window_scale) to scale your content.
+
+
+@subsection monitor_scale Content scale
+
+The content scale for a monitor can be retrieved with @ref
+glfwGetMonitorContentScale.
+
+@code
+float xscale, yscale;
+glfwGetMonitorContentScale(monitor, &xscale, &yscale);
+@endcode
+
+The content scale is the ratio between the current DPI and the platform's
+default DPI.  This is especially important for text and any UI elements.  If the
+pixel dimensions of your UI scaled by this look appropriate on your machine then
+it should appear at a reasonable size on other machines regardless of their DPI
+and scaling settings.  This relies on the system DPI and scaling settings being
+somewhat correct.
+
+The content scale may depend on both the monitor resolution and pixel density
+and on user settings.  It may be very different from the raw DPI calculated from
+the physical size and current resolution.
+
+
+@subsection monitor_pos Virtual position
+
+The position of the monitor on the virtual desktop, in
+[screen coordinates](@ref coordinate_systems), can be retrieved with @ref
+glfwGetMonitorPos.
+
+@code
+int xpos, ypos;
+glfwGetMonitorPos(monitor, &xpos, &ypos);
+@endcode
+
+
+@subsection monitor_workarea Work area
+
+The area of a monitor not occupied by global task bars or menu bars is the work
+area.  This is specified in [screen coordinates](@ref coordinate_systems) and
+can be retrieved with @ref glfwGetMonitorWorkarea.
+
+@code
+int xpos, ypos, width, height;
+glfwGetMonitorWorkarea(monitor, &xpos, &ypos, &width, &height);
+@endcode
+
+
+@subsection monitor_name Human-readable name
+
+The human-readable, UTF-8 encoded name of a monitor is returned by @ref
+glfwGetMonitorName.  See the reference documentation for the lifetime of the
+returned string.
+
+@code
+const char* name = glfwGetMonitorName(monitor);
+@endcode
+
+Monitor names are not guaranteed to be unique.  Two monitors of the same model
+and make may have the same name.  Only the monitor handle is guaranteed to be
+unique, and only until that monitor is disconnected.
+
+
+@subsection monitor_userptr User pointer
+
+Each monitor has a user pointer that can be set with @ref
+glfwSetMonitorUserPointer and queried with @ref glfwGetMonitorUserPointer.  This
+can be used for any purpose you need and will not be modified by GLFW.  The
+value will be kept until the monitor is disconnected or until the library is
+terminated.
+
+The initial value of the pointer is `NULL`.
+
+
+@subsection monitor_gamma Gamma ramp
+
+The gamma ramp of a monitor can be set with @ref glfwSetGammaRamp, which accepts
+a monitor handle and a pointer to a @ref GLFWgammaramp structure.
+
+@code
+GLFWgammaramp ramp;
+unsigned short red[256], green[256], blue[256];
+
+ramp.size = 256;
+ramp.red = red;
+ramp.green = green;
+ramp.blue = blue;
+
+for (i = 0;  i < ramp.size;  i++)
+{
+    // Fill out gamma ramp arrays as desired
+}
+
+glfwSetGammaRamp(monitor, &ramp);
+@endcode
+
+The gamma ramp data is copied before the function returns, so there is no need
+to keep it around once the ramp has been set.
+
+It is recommended that your gamma ramp have the same size as the current gamma
+ramp for that monitor.
+
+The current gamma ramp for a monitor is returned by @ref glfwGetGammaRamp.  See
+the reference documentation for the lifetime of the returned structure.
+
+@code
+const GLFWgammaramp* ramp = glfwGetGammaRamp(monitor);
+@endcode
+
+If you wish to set a regular gamma ramp, you can have GLFW calculate it for you
+from the desired exponent with @ref glfwSetGamma, which in turn calls @ref
+glfwSetGammaRamp with the resulting ramp.
+
+@code
+glfwSetGamma(monitor, 1.0);
+@endcode
+
+To experiment with gamma correction via the @ref glfwSetGamma function, run the
+`gamma` test program.
+
+@note The software controlled gamma ramp is applied _in addition_ to the
+hardware gamma correction, which today is usually an approximation of sRGB
+gamma.  This means that setting a perfectly linear ramp, or gamma 1.0, will
+produce the default (usually sRGB-like) behavior.
+
+*/

src/ThirdParty/glfw/docs/moving.dox

@@ -0,0 +1,513 @@
+/*!
+
+@page moving_guide Moving from GLFW 2 to 3
+
+@tableofcontents
+
+This is a transition guide for moving from GLFW 2 to 3.  It describes what has
+changed or been removed, but does _not_ include
+[new features](@ref news) unless they are required when moving an existing code
+base onto the new API.  For example, the new multi-monitor functions are
+required to create full screen windows with GLFW 3.
+
+
+@section moving_removed Changed and removed features
+
+@subsection moving_renamed_files Renamed library and header file
+
+The GLFW 3 header is named @ref glfw3.h and moved to the `GLFW` directory, to
+avoid collisions with the headers of other major versions.  Similarly, the GLFW
+3 library is named `glfw3,` except when it's installed as a shared library on
+Unix-like systems, where it uses the
+[soname](https://en.wikipedia.org/wiki/soname) `libglfw.so.3`.
+
+@par Old syntax
+@code
+#include <GL/glfw.h>
+@endcode
+
+@par New syntax
+@code
+#include <GLFW/glfw3.h>
+@endcode
+
+
+@subsection moving_threads Removal of threading functions
+
+The threading functions have been removed, including the per-thread sleep
+function.  They were fairly primitive, under-used, poorly integrated and took
+time away from the focus of GLFW (i.e.  context, input and window).  There are
+better threading libraries available and native threading support is available
+in both [C++11](https://en.cppreference.com/w/cpp/thread) and
+[C11](https://en.cppreference.com/w/c/thread), both of which are gaining
+traction.
+
+If you wish to use the C++11 or C11 facilities but your compiler doesn't yet
+support them, see the
+[TinyThread++](https://gitorious.org/tinythread/tinythreadpp) and
+[TinyCThread](https://github.com/tinycthread/tinycthread) projects created by
+the original author of GLFW.  These libraries implement a usable subset of the
+threading APIs in C++11 and C11, and in fact some GLFW 3 test programs use
+TinyCThread.
+
+However, GLFW 3 has better support for _use from multiple threads_ than GLFW
+2 had.  Contexts can be made current on any thread, although only a single
+thread at a time, and the documentation explicitly states which functions may be
+used from any thread and which must only be used from the main thread.
+
+@par Removed functions
+`glfwSleep`, `glfwCreateThread`, `glfwDestroyThread`, `glfwWaitThread`,
+`glfwGetThreadID`, `glfwCreateMutex`, `glfwDestroyMutex`, `glfwLockMutex`,
+`glfwUnlockMutex`, `glfwCreateCond`, `glfwDestroyCond`, `glfwWaitCond`,
+`glfwSignalCond`, `glfwBroadcastCond` and `glfwGetNumberOfProcessors`.
+
+@par Removed types
+`GLFWthreadfun`
+
+
+@subsection moving_image Removal of image and texture loading
+
+The image and texture loading functions have been removed.  They only supported
+the Targa image format, making them mostly useful for beginner level examples.
+To become of sufficiently high quality to warrant keeping them in GLFW 3, they
+would need not only to support other formats, but also modern extensions to
+OpenGL texturing.  This would either add a number of external
+dependencies (libjpeg, libpng, etc.), or force GLFW to ship with inline versions
+of these libraries.
+
+As there already are libraries doing this, it is unnecessary both to duplicate
+the work and to tie the duplicate to GLFW.  The resulting library would also be
+platform-independent, as both OpenGL and stdio are available wherever GLFW is.
+
+@par Removed functions
+`glfwReadImage`, `glfwReadMemoryImage`, `glfwFreeImage`, `glfwLoadTexture2D`,
+`glfwLoadMemoryTexture2D` and `glfwLoadTextureImage2D`.
+
+
+@subsection moving_stdcall Removal of GLFWCALL macro
+
+The `GLFWCALL` macro, which made callback functions use
+[__stdcall](https://msdn.microsoft.com/en-us/library/zxk0tw93.aspx) on Windows,
+has been removed.  GLFW is written in C, not Pascal.  Removing this macro means
+there's one less thing for application programmers to remember, i.e. the
+requirement to mark all callback functions with `GLFWCALL`.  It also simplifies
+the creation of DLLs and DLL link libraries, as there's no need to explicitly
+disable `@n` entry point suffixes.
+
+@par Old syntax
+@code
+void GLFWCALL callback_function(...);
+@endcode
+
+@par New syntax
+@code
+void callback_function(...);
+@endcode
+
+
+@subsection moving_window_handles Window handle parameters
+
+Because GLFW 3 supports multiple windows, window handle parameters have been
+added to all window-related GLFW functions and callbacks.  The handle of
+a newly created window is returned by @ref glfwCreateWindow (formerly
+`glfwOpenWindow`).  Window handles are pointers to the
+[opaque](https://en.wikipedia.org/wiki/Opaque_data_type) type @ref GLFWwindow.
+
+@par Old syntax
+@code
+glfwSetWindowTitle("New Window Title");
+@endcode
+
+@par New syntax
+@code
+glfwSetWindowTitle(window, "New Window Title");
+@endcode
+
+
+@subsection moving_monitor Explicit monitor selection
+
+GLFW 3 provides support for multiple monitors.  To request a full screen mode window,
+instead of passing `GLFW_FULLSCREEN` you specify which monitor you wish the
+window to use.  The @ref glfwGetPrimaryMonitor function returns the monitor that
+GLFW 2 would have selected, but there are many other
+[monitor functions](@ref monitor_guide).  Monitor handles are pointers to the
+[opaque](https://en.wikipedia.org/wiki/Opaque_data_type) type @ref GLFWmonitor.
+
+@par Old basic full screen
+@code
+glfwOpenWindow(640, 480, 8, 8, 8, 0, 24, 0, GLFW_FULLSCREEN);
+@endcode
+
+@par New basic full screen
+@code
+window = glfwCreateWindow(640, 480, "My Window", glfwGetPrimaryMonitor(), NULL);
+@endcode
+
+@note The framebuffer bit depth parameters of `glfwOpenWindow` have been turned
+into [window hints](@ref window_hints), but as they have been given
+[sane defaults](@ref window_hints_values) you rarely need to set these hints.
+
+
+@subsection moving_autopoll Removal of automatic event polling
+
+GLFW 3 does not automatically poll for events in @ref glfwSwapBuffers, meaning
+you need to call @ref glfwPollEvents or @ref glfwWaitEvents yourself.  Unlike
+buffer swap, which acts on a single window, the event processing functions act
+on all windows at once.
+
+@par Old basic main loop
+@code
+while (...)
+{
+    // Process input
+    // Render output
+    glfwSwapBuffers();
+}
+@endcode
+
+@par New basic main loop
+@code
+while (...)
+{
+    // Process input
+    // Render output
+    glfwSwapBuffers(window);
+    glfwPollEvents();
+}
+@endcode
+
+
+@subsection moving_context Explicit context management
+
+Each GLFW 3 window has its own OpenGL context and only you, the application
+programmer, can know which context should be current on which thread at any
+given time.  Therefore, GLFW 3 leaves that decision to you.
+
+This means that you need to call @ref glfwMakeContextCurrent after creating
+a window before you can call any OpenGL functions.
+
+
+@subsection moving_hidpi Separation of window and framebuffer sizes
+
+Window positions and sizes now use screen coordinates, which may not be the same
+as pixels on machines with high-DPI monitors.  This is important as OpenGL uses
+pixels, not screen coordinates.  For example, the rectangle specified with
+`glViewport` needs to use pixels.  Therefore, framebuffer size functions have
+been added.  You can retrieve the size of the framebuffer of a window with @ref
+glfwGetFramebufferSize function.  A framebuffer size callback has also been
+added, which can be set with @ref glfwSetFramebufferSizeCallback.
+
+@par Old basic viewport setup
+@code
+glfwGetWindowSize(&width, &height);
+glViewport(0, 0, width, height);
+@endcode
+
+@par New basic viewport setup
+@code
+glfwGetFramebufferSize(window, &width, &height);
+glViewport(0, 0, width, height);
+@endcode
+
+
+@subsection moving_window_close Window closing changes
+
+The `GLFW_OPENED` window parameter has been removed.  As long as the window has
+not been destroyed, whether through @ref glfwDestroyWindow or @ref
+glfwTerminate, the window is "open".
+
+A user attempting to close a window is now just an event like any other.  Unlike
+GLFW 2, windows and contexts created with GLFW 3 will never be destroyed unless
+you choose them to be.  Each window now has a close flag that is set to
+`GLFW_TRUE` when the user attempts to close that window.  By default, nothing else
+happens and the window stays visible.  It is then up to you to either destroy
+the window, take some other action or ignore the request.
+
+You can query the close flag at any time with @ref glfwWindowShouldClose and set
+it at any time with @ref glfwSetWindowShouldClose.
+
+@par Old basic main loop
+@code
+while (glfwGetWindowParam(GLFW_OPENED))
+{
+    ...
+}
+@endcode
+
+@par New basic main loop
+@code
+while (!glfwWindowShouldClose(window))
+{
+    ...
+}
+@endcode
+
+The close callback no longer returns a value.  Instead, it is called after the
+close flag has been set so it can override its value, if it chooses to, before
+event processing completes.  You may however not call @ref glfwDestroyWindow
+from the close callback (or any other window related callback).
+
+@par Old syntax
+@code
+int GLFWCALL window_close_callback(void);
+@endcode
+
+@par New syntax
+@code
+void window_close_callback(GLFWwindow* window);
+@endcode
+
+@note GLFW never clears the close flag to `GLFW_FALSE`, meaning you can use it
+for other reasons to close the window as well, for example the user choosing
+Quit from an in-game menu.
+
+
+@subsection moving_hints Persistent window hints
+
+The `glfwOpenWindowHint` function has been renamed to @ref glfwWindowHint.
+
+Window hints are no longer reset to their default values on window creation, but
+instead retain their values until modified by @ref glfwWindowHint or @ref
+glfwDefaultWindowHints, or until the library is terminated and re-initialized.
+
+
+@subsection moving_video_modes Video mode enumeration
+
+Video mode enumeration is now per-monitor.  The @ref glfwGetVideoModes function
+now returns all available modes for a specific monitor instead of requiring you
+to guess how large an array you need.  The `glfwGetDesktopMode` function, which
+had poorly defined behavior, has been replaced by @ref glfwGetVideoMode, which
+returns the current mode of a monitor.
+
+
+@subsection moving_char_up Removal of character actions
+
+The action parameter of the [character callback](@ref GLFWcharfun) has been
+removed.  This was an artefact of the origin of GLFW, i.e. being developed in
+English by a Swede.  However, many keyboard layouts require more than one key to
+produce characters with diacritical marks. Even the Swedish keyboard layout
+requires this for uncommon cases like ü.
+
+@par Old syntax
+@code
+void GLFWCALL character_callback(int character, int action);
+@endcode
+
+@par New syntax
+@code
+void character_callback(GLFWwindow* window, int character);
+@endcode
+
+
+@subsection moving_cursorpos Cursor position changes
+
+The `glfwGetMousePos` function has been renamed to @ref glfwGetCursorPos,
+`glfwSetMousePos` to @ref glfwSetCursorPos and `glfwSetMousePosCallback` to @ref
+glfwSetCursorPosCallback.
+
+The cursor position is now `double` instead of `int`, both for the direct
+functions and for the callback.  Some platforms can provide sub-pixel cursor
+movement and this data is now passed on to the application where available.  On
+platforms where this is not provided, the decimal part is zero.
+
+GLFW 3 only allows you to position the cursor within a window using @ref
+glfwSetCursorPos (formerly `glfwSetMousePos`) when that window is active.
+Unless the window is active, the function fails silently.
+
+
+@subsection moving_wheel Wheel position replaced by scroll offsets
+
+The `glfwGetMouseWheel` function has been removed.  Scrolling is the input of
+offsets and has no absolute position.  The mouse wheel callback has been
+replaced by a [scroll callback](@ref GLFWscrollfun) that receives
+two-dimensional floating point scroll offsets.  This allows you to receive
+precise scroll data from for example modern touchpads.
+
+@par Old syntax
+@code
+void GLFWCALL mouse_wheel_callback(int position);
+@endcode
+
+@par New syntax
+@code
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+@endcode
+
+@par Removed functions
+`glfwGetMouseWheel`
+
+
+@subsection moving_repeat Key repeat action
+
+The `GLFW_KEY_REPEAT` enable has been removed and key repeat is always enabled
+for both keys and characters.  A new key action, `GLFW_REPEAT`, has been added
+to allow the [key callback](@ref GLFWkeyfun) to distinguish an initial key press
+from a repeat.  Note that @ref glfwGetKey still returns only `GLFW_PRESS` or
+`GLFW_RELEASE`.
+
+
+@subsection moving_keys Physical key input
+
+GLFW 3 key tokens map to physical keys, unlike in GLFW 2 where they mapped to
+the values generated by the current keyboard layout.  The tokens are named
+according to the values they would have using the standard US layout, but this
+is only a convenience, as most programmers are assumed to know that layout.
+This means that (for example) `GLFW_KEY_LEFT_BRACKET` is always a single key and
+is the same key in the same place regardless of what keyboard layouts the users
+of your program has.
+
+The key input facility was never meant for text input, although using it that
+way worked slightly better in GLFW 2.  If you were using it to input text, you
+should be using the character callback instead, on both GLFW 2 and 3.  This will
+give you the characters being input, as opposed to the keys being pressed.
+
+GLFW 3 has key tokens for all keys on a standard 105 key keyboard, so instead of
+having to remember whether to check for `a` or `A`, you now check for
+@ref GLFW_KEY_A.
+
+
+@subsection moving_joystick Joystick function changes
+
+The `glfwGetJoystickPos` function has been renamed to @ref glfwGetJoystickAxes.
+
+The `glfwGetJoystickParam` function and the `GLFW_PRESENT`, `GLFW_AXES` and
+`GLFW_BUTTONS` tokens have been replaced by the @ref glfwJoystickPresent
+function as well as axis and button counts returned by the @ref
+glfwGetJoystickAxes and @ref glfwGetJoystickButtons functions.
+
+
+@subsection moving_mbcs Win32 MBCS support
+
+The Win32 port of GLFW 3 will not compile in
+[MBCS mode](https://msdn.microsoft.com/en-us/library/5z097dxa.aspx).
+However, because the use of the Unicode version of the Win32 API doesn't affect
+the process as a whole, but only those windows created using it, it's perfectly
+possible to call MBCS functions from other parts of the same application.
+Therefore, even if an application using GLFW has MBCS mode code, there's no need
+for GLFW itself to support it.
+
+
+@subsection moving_windows Support for versions of Windows older than XP
+
+All explicit support for version of Windows older than XP has been removed.
+There is no code that actively prevents GLFW 3 from running on these earlier
+versions, but it uses Win32 functions that those versions lack.
+
+Windows XP was released in 2001, and by now (January 2015) it has not only
+replaced almost all earlier versions of Windows, but is itself rapidly being
+replaced by Windows 7 and 8.  The MSDN library doesn't even provide
+documentation for version older than Windows 2000, making it difficult to
+maintain compatibility with these versions even if it was deemed worth the
+effort.
+
+The Win32 API has also not stood still, and GLFW 3 uses many functions only
+present on Windows XP or later.  Even supporting an OS as new as XP (new
+from the perspective of GLFW 2, which still supports Windows 95) requires
+runtime checking for a number of functions that are present only on modern
+version of Windows.
+
+
+@subsection moving_syskeys Capture of system-wide hotkeys
+
+The ability to disable and capture system-wide hotkeys like Alt+Tab has been
+removed.  Modern applications, whether they're games, scientific visualisations
+or something else, are nowadays expected to be good desktop citizens and allow
+these hotkeys to function even when running in full screen mode.
+
+
+@subsection moving_terminate Automatic termination
+
+GLFW 3 does not register @ref glfwTerminate with `atexit` at initialization,
+because `exit` calls registered functions from the calling thread and while it
+is permitted to call `exit` from any thread, @ref glfwTerminate must only be
+called from the main thread.
+
+To release all resources allocated by GLFW, you should call @ref glfwTerminate
+yourself, from the main thread, before the program terminates.  Note that this
+destroys all windows not already destroyed with @ref glfwDestroyWindow,
+invalidating any window handles you may still have.
+
+
+@subsection moving_glu GLU header inclusion
+
+GLFW 3 does not by default include the GLU header and GLU itself has been
+deprecated by [Khronos](https://en.wikipedia.org/wiki/Khronos_Group).  __New
+projects should not use GLU__, but if you need it for legacy code that
+has been moved to GLFW 3, you can request that the GLFW header includes it by
+defining @ref GLFW_INCLUDE_GLU before the inclusion of the GLFW header.
+
+@par Old syntax
+@code
+#include <GL/glfw.h>
+@endcode
+
+@par New syntax
+@code
+#define GLFW_INCLUDE_GLU
+#include <GLFW/glfw3.h>
+@endcode
+
+There are many libraries that offer replacements for the functionality offered
+by GLU.  For the matrix helper functions, see math libraries like
+[GLM](https://github.com/g-truc/glm) (for C++),
+[linmath.h](https://github.com/datenwolf/linmath.h) (for C) and others.  For the
+tessellation functions, see for example
+[libtess2](https://github.com/memononen/libtess2).
+
+
+@section moving_tables Name change tables
+
+
+@subsection moving_renamed_functions Renamed functions
+
+| GLFW 2                      | GLFW 3                        | Notes |
+| --------------------------- | ----------------------------- | ----- |
+| `glfwOpenWindow`            | @ref glfwCreateWindow         | All channel bit depths are now hints
+| `glfwCloseWindow`           | @ref glfwDestroyWindow        |       |
+| `glfwOpenWindowHint`        | @ref glfwWindowHint           | Now accepts all `GLFW_*_BITS` tokens |
+| `glfwEnable`                | @ref glfwSetInputMode         |       |
+| `glfwDisable`               | @ref glfwSetInputMode         |       |
+| `glfwGetMousePos`           | @ref glfwGetCursorPos         |       |
+| `glfwSetMousePos`           | @ref glfwSetCursorPos         |       |
+| `glfwSetMousePosCallback`   | @ref glfwSetCursorPosCallback |       |
+| `glfwSetMouseWheelCallback` | @ref glfwSetScrollCallback    | Accepts two-dimensional scroll offsets as doubles |
+| `glfwGetJoystickPos`        | @ref glfwGetJoystickAxes      |       |
+| `glfwGetWindowParam`        | @ref glfwGetWindowAttrib      |       |
+| `glfwGetGLVersion`          | @ref glfwGetWindowAttrib      | Use `GLFW_CONTEXT_VERSION_MAJOR`, `GLFW_CONTEXT_VERSION_MINOR` and `GLFW_CONTEXT_REVISION` |
+| `glfwGetDesktopMode`        | @ref glfwGetVideoMode         | Returns the current mode of a monitor |
+| `glfwGetJoystickParam`      | @ref glfwJoystickPresent      | The axis and button counts are provided by @ref glfwGetJoystickAxes and @ref glfwGetJoystickButtons |
+
+
+@subsection moving_renamed_types Renamed types
+
+| GLFW 2              | GLFW 3                | Notes |
+| ------------------- | --------------------- |       |
+| `GLFWmousewheelfun` | @ref GLFWscrollfun    |       |
+| `GLFWmouseposfun`   | @ref GLFWcursorposfun |       |
+
+
+@subsection moving_renamed_tokens Renamed tokens
+
+| GLFW 2                      | GLFW 3                       | Notes |
+| --------------------------- | ---------------------------- | ----- |
+| `GLFW_OPENGL_VERSION_MAJOR` | `GLFW_CONTEXT_VERSION_MAJOR` | Renamed as it applies to OpenGL ES as well |
+| `GLFW_OPENGL_VERSION_MINOR` | `GLFW_CONTEXT_VERSION_MINOR` | Renamed as it applies to OpenGL ES as well |
+| `GLFW_FSAA_SAMPLES`         | `GLFW_SAMPLES`               | Renamed to match the OpenGL API |
+| `GLFW_ACTIVE`               | `GLFW_FOCUSED`               | Renamed to match the window focus callback |
+| `GLFW_WINDOW_NO_RESIZE`     | `GLFW_RESIZABLE`             | The default has been inverted |
+| `GLFW_MOUSE_CURSOR`         | `GLFW_CURSOR`                | Used with @ref glfwSetInputMode |
+| `GLFW_KEY_ESC`              | `GLFW_KEY_ESCAPE`            |       |
+| `GLFW_KEY_DEL`              | `GLFW_KEY_DELETE`            |       |
+| `GLFW_KEY_PAGEUP`           | `GLFW_KEY_PAGE_UP`           |       |
+| `GLFW_KEY_PAGEDOWN`         | `GLFW_KEY_PAGE_DOWN`         |       |
+| `GLFW_KEY_KP_NUM_LOCK`      | `GLFW_KEY_NUM_LOCK`          |       |
+| `GLFW_KEY_LCTRL`            | `GLFW_KEY_LEFT_CONTROL`      |       |
+| `GLFW_KEY_LSHIFT`           | `GLFW_KEY_LEFT_SHIFT`        |       |
+| `GLFW_KEY_LALT`             | `GLFW_KEY_LEFT_ALT`          |       |
+| `GLFW_KEY_LSUPER`           | `GLFW_KEY_LEFT_SUPER`        |       |
+| `GLFW_KEY_RCTRL`            | `GLFW_KEY_RIGHT_CONTROL`     |       |
+| `GLFW_KEY_RSHIFT`           | `GLFW_KEY_RIGHT_SHIFT`       |       |
+| `GLFW_KEY_RALT`             | `GLFW_KEY_RIGHT_ALT`         |       |
+| `GLFW_KEY_RSUPER`           | `GLFW_KEY_RIGHT_SUPER`       |       |
+
+*/

src/ThirdParty/glfw/docs/news.dox

@@ -0,0 +1,234 @@
+/*!
+
+@page news Release notes
+
+@tableofcontents
+
+
+@section news_34 Release notes for version 3.4
+
+@subsection features_34 New features in version 3.4
+
+@subsubsection runtime_platform_34 Runtime platform selection
+
+GLFW now supports being compiled for multiple backends and selecting between
+them at runtime with the @ref GLFW_PLATFORM init hint.  After initialization the
+selected platform can be queried with @ref glfwGetPlatform.  You can check if
+support for a given platform is compiled in with @ref glfwPlatformSupported.
+
+
+@subsubsection standard_cursors_34 More standard cursors
+
+GLFW now provides the standard cursor shapes @ref GLFW_RESIZE_NWSE_CURSOR and
+@ref GLFW_RESIZE_NESW_CURSOR for diagonal resizing, @ref GLFW_RESIZE_ALL_CURSOR
+for omni-directional resizing and @ref GLFW_NOT_ALLOWED_CURSOR for showing an
+action is not allowed.
+
+Unlike the original set, these shapes may not be available everywhere and
+creation will then fail with the new @ref GLFW_CURSOR_UNAVAILABLE error.
+
+The cursors for horizontal and vertical resizing are now referred to as @ref
+GLFW_RESIZE_EW_CURSOR and @ref GLFW_RESIZE_NS_CURSOR, and the pointing hand
+cursor is now referred to as @ref GLFW_POINTING_HAND_CURSOR.  The older names
+are still available.
+
+For more information see @ref cursor_standard.
+
+
+@subsubsection mouse_passthrough_34 Mouse event passthrough
+
+GLFW now provides the [GLFW_MOUSE_PASSTHROUGH](@ref GLFW_MOUSE_PASSTHROUGH_hint)
+window hint for making a window transparent to mouse input, lettings events pass
+to whatever window is behind it.  This can also be changed after window
+creation with the matching [window attribute](@ref GLFW_MOUSE_PASSTHROUGH_attrib).
+
+
+@subsubsection features_34_angle_backend Support for ANGLE rendering backend selection
+
+GLFW now provides the
+[GLFW_ANGLE_PLATFORM_TYPE](@ref GLFW_ANGLE_PLATFORM_TYPE_hint) init hint for
+requesting a specific rendering backend when using
+[ANGLE](https://chromium.googlesource.com/angle/angle/) to create OpenGL ES
+contexts.
+
+
+@subsubsection features_34_init_allocator Support for custom memory allocator
+
+GLFW now supports plugging a custom memory allocator at initialization with @ref
+glfwInitAllocator.  The allocator is a struct of type @ref GLFWallocator with
+function pointers corresponding to the standard library functions `malloc`,
+`realloc` and `free`.
+
+For more information see @ref init_allocator.
+
+
+@subsubsection features_34_win32_keymenu Support for keyboard access to Windows window menu
+
+GLFW now provides the
+[GLFW_WIN32_KEYBOARD_MENU](@ref GLFW_WIN32_KEYBOARD_MENU_hint) window hint for
+enabling keyboard access to the window menu via the Alt+Space and
+Alt-and-then-Space shortcuts.  This may be useful for more GUI-oriented
+applications.
+
+
+@subsection caveats Caveats for version 3.4
+
+@subsubsection native_34 Multiple sets of native access functions
+
+Because GLFW now supports runtime selection of platform (window system), a library binary
+may export native access functions for multiple platforms.  Starting with version 3.4 you
+must not assume that GLFW is running on a platform just because it exports native access
+functions for it.  After initialization you can query the selected platform with @ref
+glfwGetPlatform.
+
+
+@subsubsection version_string_34 Version string format has been changed
+
+Because GLFW now supports runtime selection of platform (window system), the version
+string returned by @ref glfwGetVersionString has been expanded.  It now contains the names
+of all APIs for all the platforms that the library binary supports.
+
+
+@subsubsection joysticks_34 Joystick support is initialized on demand
+
+The joystick part of GLFW is now initialized when first used, primarily to work
+around faulty Windows drivers that cause DirectInput to take up to several
+seconds to enumerate devices.
+
+This change will usually not be observable.  However, if your application waits
+for events without having first called any joystick function or created any
+visible windows, the wait may never unblock as GLFW may not yet have subscribed
+to joystick related OS events.
+
+To work around this, call any joystick function before waiting for events, for
+example by setting a [joystick callback](@ref joystick_event).
+
+
+@subsubsection standalone_34 Tests and examples are disabled when built as a sub-project
+
+GLFW now does not build the tests and examples when it is added as
+a subdirectory of another CMake project.  To enable these, set the @ref
+GLFW_BUILD_TESTS and @ref GLFW_BUILD_EXAMPLES cache variables before adding the
+GLFW subdirectory.
+
+@code{.cmake}
+set(GLFW_BUILD_EXAMPLES ON CACHE BOOL "" FORCE)
+set(GLFW_BUILD_TESTS ON CACHE BOOL "" FORCE)
+add_subdirectory(path/to/glfw)
+@endcode
+
+
+@subsubsection initmenu_34 macOS main menu now created at initialization
+
+GLFW now creates the main menu and completes the initialization of NSApplication
+during initialization.  Programs that do not want a main menu can disable it
+with the [GLFW_COCOA_MENUBAR](@ref GLFW_COCOA_MENUBAR_hint) init hint.
+
+
+@subsubsection corevideo_34 CoreVideo dependency has been removed
+
+GLFW no longer depends on the CoreVideo framework on macOS and it no longer
+needs to be specified during compilation or linking.
+
+
+@subsubsection caveat_fbtransparency_34 Framebuffer transparency requires DWM transparency
+
+GLFW no longer supports framebuffer transparency enabled via @ref
+GLFW_TRANSPARENT_FRAMEBUFFER on Windows 7 if DWM transparency is off
+(the Transparency setting under Personalization > Window Color).
+
+
+@subsection deprecations_34 Deprecations in version 3.4
+
+@subsection removals_34 Removals in 3.4
+
+@subsubsection vulkan_static_34 GLFW_VULKAN_STATIC CMake option has been removed
+
+This option was used to compile GLFW directly linked with the Vulkan loader, instead of
+using dynamic loading to get hold of `vkGetInstanceProcAddr` at initialization.  This is
+now done by calling the @ref glfwInitVulkanLoader function before initialization.
+
+If you need backward compatibility, this macro can still be defined for GLFW 3.4 and will
+have no effect.  The call to @ref glfwInitVulkanLoader can be conditionally enabled in
+your code by checking the @ref GLFW_VERSION_MAJOR and @ref GLFW_VERSION_MINOR macros.
+
+
+@subsubsection osmesa_option_34 GLFW_USE_OSMESA CMake option has been removed
+
+This option was used to compile GLFW for the Null platform.  The Null platform is now
+always supported.  To produce a library binary that only supports this platform, the way
+this CMake option used to do, you will instead need to disable the default platform for
+the target OS.  This means setting the @ref GLFW_BUILD_WIN32, @ref GLFW_BUILD_COCOA or
+@ref GLFW_BUILD_X11 CMake option to false.
+
+You can set all of them to false and the ones that don't apply for the target OS will be
+ignored.
+
+
+@subsubsection wl_shell_34 Support for the wl_shell protocol has been removed
+
+Support for the wl_shell protocol has been removed and GLFW now only supports
+the XDG-Shell protocol.  If your Wayland compositor does not support XDG-Shell
+then GLFW will fail to initialize.
+
+
+@subsection symbols_34 New symbols in version 3.4
+
+@subsubsection functions_34 New functions in version 3.4
+
+ - @ref glfwInitAllocator
+ - @ref glfwGetPlatform
+ - @ref glfwPlatformSupported
+ - @ref glfwInitVulkanLoader
+
+
+@subsubsection types_34 New types in version 3.4
+
+ - @ref GLFWallocator
+ - @ref GLFWallocatefun
+ - @ref GLFWreallocatefun
+ - @ref GLFWdeallocatefun
+
+
+@subsubsection constants_34 New constants in version 3.4
+
+ - @ref GLFW_PLATFORM
+ - @ref GLFW_ANY_PLATFORM
+ - @ref GLFW_PLATFORM_WIN32
+ - @ref GLFW_PLATFORM_COCOA
+ - @ref GLFW_PLATFORM_WAYLAND
+ - @ref GLFW_PLATFORM_X11
+ - @ref GLFW_PLATFORM_NULL
+ - @ref GLFW_PLATFORM_UNAVAILABLE
+ - @ref GLFW_POINTING_HAND_CURSOR
+ - @ref GLFW_RESIZE_EW_CURSOR
+ - @ref GLFW_RESIZE_NS_CURSOR
+ - @ref GLFW_RESIZE_NWSE_CURSOR
+ - @ref GLFW_RESIZE_NESW_CURSOR
+ - @ref GLFW_RESIZE_ALL_CURSOR
+ - @ref GLFW_MOUSE_PASSTHROUGH
+ - @ref GLFW_NOT_ALLOWED_CURSOR
+ - @ref GLFW_CURSOR_UNAVAILABLE
+ - @ref GLFW_WIN32_KEYBOARD_MENU
+ - @ref GLFW_CONTEXT_DEBUG
+ - @ref GLFW_FEATURE_UNAVAILABLE
+ - @ref GLFW_FEATURE_UNIMPLEMENTED
+ - @ref GLFW_ANGLE_PLATFORM_TYPE
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_NONE
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_OPENGL
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_OPENGLES
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_D3D9
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_D3D11
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_VULKAN
+ - @ref GLFW_ANGLE_PLATFORM_TYPE_METAL
+ - @ref GLFW_X11_XCB_VULKAN_SURFACE
+
+
+@section news_archive Release notes for earlier versions
+
+- [Release notes for 3.3](https://www.glfw.org/docs/3.3/news.html)
+- [Release notes for 3.2](https://www.glfw.org/docs/3.2/news.html)
+- [Release notes for 3.1](https://www.glfw.org/docs/3.1/news.html)
+- [Release notes for 3.0](https://www.glfw.org/docs/3.0/news.html)
+
+*/

src/ThirdParty/glfw/docs/quick.dox

@@ -0,0 +1,371 @@
+/*!
+
+@page quick_guide Getting started
+
+@tableofcontents
+
+This guide takes you through writing a small application using GLFW 3.  The
+application will create a window and OpenGL context, render a rotating triangle
+and exit when the user closes the window or presses _Escape_.  This guide will
+introduce a few of the most commonly used functions, but there are many more.
+
+This guide assumes no experience with earlier versions of GLFW.  If you
+have used GLFW 2 in the past, read @ref moving_guide, as some functions
+behave differently in GLFW 3.
+
+
+@section quick_steps Step by step
+
+@subsection quick_include Including the GLFW header
+
+In the source files of your application where you use GLFW, you need to include
+its header file.
+
+@code
+#include <GLFW/glfw3.h>
+@endcode
+
+This header provides all the constants, types and function prototypes of the
+GLFW API.
+
+By default it also includes the OpenGL header from your development environment.
+On some platforms this header only supports older versions of OpenGL.  The most
+extreme case is Windows, where it typically only supports OpenGL 1.2.
+
+Most programs will instead use an
+[extension loader library](@ref context_glext_auto) and include its header.
+This example uses files generated by [glad](https://gen.glad.sh/).  The GLFW
+header can detect most such headers if they are included first and will then not
+include the one from your development environment.
+
+@code
+#include <glad/gl.h>
+#include <GLFW/glfw3.h>
+@endcode
+
+To make sure there will be no header conflicts, you can define @ref
+GLFW_INCLUDE_NONE before the GLFW header to explicitly disable inclusion of the
+development environment header.  This also allows the two headers to be included
+in any order.
+
+@code
+#define GLFW_INCLUDE_NONE
+#include <GLFW/glfw3.h>
+#include <glad/gl.h>
+@endcode
+
+
+@subsection quick_init_term Initializing and terminating GLFW
+
+Before you can use most GLFW functions, the library must be initialized.  On
+successful initialization, `GLFW_TRUE` is returned.  If an error occurred,
+`GLFW_FALSE` is returned.
+
+@code
+if (!glfwInit())
+{
+    // Initialization failed
+}
+@endcode
+
+Note that `GLFW_TRUE` and `GLFW_FALSE` are and will always be one and zero.
+
+When you are done using GLFW, typically just before the application exits, you
+need to terminate GLFW.
+
+@code
+glfwTerminate();
+@endcode
+
+This destroys any remaining windows and releases any other resources allocated by
+GLFW.  After this call, you must initialize GLFW again before using any GLFW
+functions that require it.
+
+
+@subsection quick_capture_error Setting an error callback
+
+Most events are reported through callbacks, whether it's a key being pressed,
+a GLFW window being moved, or an error occurring.  Callbacks are C functions (or
+C++ static methods) that are called by GLFW with arguments describing the event.
+
+In case a GLFW function fails, an error is reported to the GLFW error callback.
+You can receive these reports with an error callback.  This function must have
+the signature below but may do anything permitted in other callbacks.
+
+@code
+void error_callback(int error, const char* description)
+{
+    fprintf(stderr, "Error: %s\n", description);
+}
+@endcode
+
+Callback functions must be set, so GLFW knows to call them.  The function to set
+the error callback is one of the few GLFW functions that may be called before
+initialization, which lets you be notified of errors both during and after
+initialization.
+
+@code
+glfwSetErrorCallback(error_callback);
+@endcode
+
+
+@subsection quick_create_window Creating a window and context
+
+The window and its OpenGL context are created with a single call to @ref
+glfwCreateWindow, which returns a handle to the created combined window and
+context object
+
+@code
+GLFWwindow* window = glfwCreateWindow(640, 480, "My Title", NULL, NULL);
+if (!window)
+{
+    // Window or OpenGL context creation failed
+}
+@endcode
+
+This creates a 640 by 480 windowed mode window with an OpenGL context.  If
+window or OpenGL context creation fails, `NULL` will be returned.  You should
+always check the return value.  While window creation rarely fails, context
+creation depends on properly installed drivers and may fail even on machines
+with the necessary hardware.
+
+By default, the OpenGL context GLFW creates may have any version.  You can
+require a minimum OpenGL version by setting the `GLFW_CONTEXT_VERSION_MAJOR` and
+`GLFW_CONTEXT_VERSION_MINOR` hints _before_ creation.  If the required minimum
+version is not supported on the machine, context (and window) creation fails.
+
+You can select the OpenGL profile by setting the `GLFW_OPENGL_PROFILE` hint.
+This program uses the core profile as that is the only profile macOS supports
+for OpenGL 3.x and 4.x.
+
+@code
+glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+GLFWwindow* window = glfwCreateWindow(640, 480, "My Title", NULL, NULL);
+if (!window)
+{
+    // Window or context creation failed
+}
+@endcode
+
+The window handle is passed to all window related functions and is provided to
+along to all window related callbacks, so they can tell which window received
+the event.
+
+When a window and context is no longer needed, destroy it.
+
+@code
+glfwDestroyWindow(window);
+@endcode
+
+Once this function is called, no more events will be delivered for that window
+and its handle becomes invalid.
+
+
+@subsection quick_context_current Making the OpenGL context current
+
+Before you can use the OpenGL API, you must have a current OpenGL context.
+
+@code
+glfwMakeContextCurrent(window);
+@endcode
+
+The context will remain current until you make another context current or until
+the window owning the current context is destroyed.
+
+If you are using an [extension loader library](@ref context_glext_auto) to
+access modern OpenGL then this is when to initialize it, as the loader needs
+a current context to load from.  This example uses
+[glad](https://github.com/Dav1dde/glad), but the same rule applies to all such
+libraries.
+
+@code
+gladLoadGL(glfwGetProcAddress);
+@endcode
+
+
+@subsection quick_window_close Checking the window close flag
+
+Each window has a flag indicating whether the window should be closed.
+
+When the user attempts to close the window, either by pressing the close widget
+in the title bar or using a key combination like Alt+F4, this flag is set to 1.
+Note that __the window isn't actually closed__, so you are expected to monitor
+this flag and either destroy the window or give some kind of feedback to the
+user.
+
+@code
+while (!glfwWindowShouldClose(window))
+{
+    // Keep running
+}
+@endcode
+
+You can be notified when the user is attempting to close the window by setting
+a close callback with @ref glfwSetWindowCloseCallback.  The callback will be
+called immediately after the close flag has been set.
+
+You can also set it yourself with @ref glfwSetWindowShouldClose.  This can be
+useful if you want to interpret other kinds of input as closing the window, like
+for example pressing the _Escape_ key.
+
+
+@subsection quick_key_input Receiving input events
+
+Each window has a large number of callbacks that can be set to receive all the
+various kinds of events.  To receive key press and release events, create a key
+callback function.
+
+@code
+static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GLFW_TRUE);
+}
+@endcode
+
+The key callback, like other window related callbacks, are set per-window.
+
+@code
+glfwSetKeyCallback(window, key_callback);
+@endcode
+
+In order for event callbacks to be called when events occur, you need to process
+events as described below.
+
+
+@subsection quick_render Rendering with OpenGL
+
+Once you have a current OpenGL context, you can use OpenGL normally.  In this
+tutorial, a multi-colored rotating triangle will be rendered.  The framebuffer
+size needs to be retrieved for `glViewport`.
+
+@code
+int width, height;
+glfwGetFramebufferSize(window, &width, &height);
+glViewport(0, 0, width, height);
+@endcode
+
+You can also set a framebuffer size callback using @ref
+glfwSetFramebufferSizeCallback and be notified when the size changes.
+
+The details of how to render with OpenGL is outside the scope of this tutorial,
+but there are many excellent resources for learning modern OpenGL.  Here are
+a few of them:
+
+ - [Anton's OpenGL 4 Tutorials](https://antongerdelan.net/opengl/)
+ - [Learn OpenGL](https://learnopengl.com/)
+ - [Open.GL](https://open.gl/)
+
+These all happen to use GLFW, but OpenGL itself works the same whatever API you
+use to create the window and context.
+
+
+@subsection quick_timer Reading the timer
+
+To create smooth animation, a time source is needed.  GLFW provides a timer that
+returns the number of seconds since initialization.  The time source used is the
+most accurate on each platform and generally has micro- or nanosecond
+resolution.
+
+@code
+double time = glfwGetTime();
+@endcode
+
+
+@subsection quick_swap_buffers Swapping buffers
+
+GLFW windows by default use double buffering.  That means that each window has
+two rendering buffers; a front buffer and a back buffer.  The front buffer is
+the one being displayed and the back buffer the one you render to.
+
+When the entire frame has been rendered, the buffers need to be swapped with one
+another, so the back buffer becomes the front buffer and vice versa.
+
+@code
+glfwSwapBuffers(window);
+@endcode
+
+The swap interval indicates how many frames to wait until swapping the buffers,
+commonly known as _vsync_.  By default, the swap interval is zero, meaning
+buffer swapping will occur immediately.  On fast machines, many of those frames
+will never be seen, as the screen is still only updated typically 60-75 times
+per second, so this wastes a lot of CPU and GPU cycles.
+
+Also, because the buffers will be swapped in the middle the screen update,
+leading to [screen tearing](https://en.wikipedia.org/wiki/Screen_tearing).
+
+For these reasons, applications will typically want to set the swap interval to
+one.  It can be set to higher values, but this is usually not recommended,
+because of the input latency it leads to.
+
+@code
+glfwSwapInterval(1);
+@endcode
+
+This function acts on the current context and will fail unless a context is
+current.
+
+
+@subsection quick_process_events Processing events
+
+GLFW needs to communicate regularly with the window system both in order to
+receive events and to show that the application hasn't locked up.  Event
+processing must be done regularly while you have visible windows and is normally
+done each frame after buffer swapping.
+
+There are two methods for processing pending events; polling and waiting.  This
+example will use event polling, which processes only those events that have
+already been received and then returns immediately.
+
+@code
+glfwPollEvents();
+@endcode
+
+This is the best choice when rendering continually, like most games do.  If
+instead you only need to update your rendering once you have received new input,
+@ref glfwWaitEvents is a better choice.  It waits until at least one event has
+been received, putting the thread to sleep in the meantime, and then processes
+all received events.  This saves a great deal of CPU cycles and is useful for,
+for example, many kinds of editing tools.
+
+
+@section quick_example Putting it together
+
+Now that you know how to initialize GLFW, create a window and poll for
+keyboard input, it's possible to create a small program.
+
+This program creates a 640 by 480 windowed mode window and starts a loop that
+clears the screen, renders a triangle and processes events until the user either
+presses _Escape_ or closes the window.
+
+@snippet triangle-opengl.c code
+
+The program above can be found in the
+[source package](https://www.glfw.org/download.html) as
+`examples/triangle-opengl.c` and is compiled along with all other examples when
+you build GLFW.  If you built GLFW from the source package then you already have
+this as `triangle-opengl.exe` on Windows, `triangle-opengl` on Linux or
+`triangle-opengl.app` on macOS.
+
+This tutorial used only a few of the many functions GLFW provides.  There are
+guides for each of the areas covered by GLFW.  Each guide will introduce all the
+functions for that category.
+
+ - @ref intro_guide
+ - @ref window_guide
+ - @ref context_guide
+ - @ref monitor_guide
+ - @ref input_guide
+
+You can access reference documentation for any GLFW function by clicking it and
+the reference for each function links to related functions and guide sections.
+
+The tutorial ends here.  Once you have written a program that uses GLFW, you
+will need to compile and link it.  How to do that depends on the development
+environment you are using and is best explained by the documentation for that
+environment.  To learn about the details that are specific to GLFW, see
+@ref build_guide.
+
+*/

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+</svg>

src/ThirdParty/glfw/docs/vulkan.dox

@@ -0,0 +1,246 @@
+/*!
+
+@page vulkan_guide Vulkan guide
+
+@tableofcontents
+
+This guide is intended to fill the gaps between the official [Vulkan
+resources](https://www.khronos.org/vulkan/) and the rest of the GLFW
+documentation and is not a replacement for either.  It assumes some familiarity
+with Vulkan concepts like loaders, devices, queues and surfaces and leaves it to
+the Vulkan documentation to explain the details of Vulkan functions.
+
+To develop for Vulkan you should download the [LunarG Vulkan
+SDK](https://vulkan.lunarg.com/) for your platform.  Apart from headers and link
+libraries, they also provide the validation layers necessary for development.
+
+The [Vulkan Tutorial](https://vulkan-tutorial.com/) has more information on how
+to use GLFW and Vulkan.  The [Khronos Vulkan
+Samples](https://github.com/KhronosGroup/Vulkan-Samples) also use GLFW, although
+with a small framework in between.
+
+For details on a specific Vulkan support function, see the @ref vulkan.  There
+are also guides for the other areas of the GLFW API.
+
+ - @ref intro_guide
+ - @ref window_guide
+ - @ref context_guide
+ - @ref monitor_guide
+ - @ref input_guide
+
+
+@section vulkan_loader Finding the Vulkan loader
+
+GLFW itself does not ever need to be linked against the Vulkan loader.
+
+By default, GLFW will load the Vulkan loader dynamically at runtime via its standard name:
+`vulkan-1.dll` on Windows, `libvulkan.so.1` on Linux and other Unix-like systems and
+`libvulkan.1.dylib` on macOS.
+
+@macos GLFW will also look up and search the executable subdirectory of your application
+bundle.
+
+If your code is using a Vulkan loader with a different name or in a non-standard location
+you will need to direct GLFW to it.  Pass your version of `vkGetInstanceProcAddr` to @ref
+glfwInitVulkanLoader before initializing GLFW and it will use that function for all Vulkan
+entry point retrieval.  This prevents GLFW from dynamically loading the Vulkan loader.
+
+@code
+glfwInitVulkanLoader(vkGetInstanceProcAddr);
+@endcode
+
+@macos To make your application be redistributable you will need to set up the application
+bundle according to the LunarG SDK documentation.  This is explained in more detail in the
+[SDK documentation for macOS](https://vulkan.lunarg.com/doc/sdk/latest/mac/getting_started.html).
+
+
+@section vulkan_include Including the Vulkan header file
+
+To have GLFW include the Vulkan header, define @ref GLFW_INCLUDE_VULKAN before including
+the GLFW header.
+
+@code
+#define GLFW_INCLUDE_VULKAN
+#include <GLFW/glfw3.h>
+@endcode
+
+If you instead want to include the Vulkan header from a custom location or use
+your own custom Vulkan header then do this before the GLFW header.
+
+@code
+#include <path/to/vulkan.h>
+#include <GLFW/glfw3.h>
+@endcode
+
+Unless a Vulkan header is included, either by the GLFW header or above it, the following
+GLFW functions will not be declared, as depend on Vulkan types.
+
+ - @ref glfwInitVulkanLoader
+ - @ref glfwGetInstanceProcAddress
+ - @ref glfwGetPhysicalDevicePresentationSupport
+ - @ref glfwCreateWindowSurface
+
+The `VK_USE_PLATFORM_*_KHR` macros do not need to be defined for the Vulkan part
+of GLFW to work.  Define them only if you are using these extensions directly.
+
+
+@section vulkan_support Querying for Vulkan support
+
+If you are linking directly against the Vulkan loader then you can skip this
+section.  The canonical desktop loader library exports all Vulkan core and
+Khronos extension functions, allowing them to be called directly.
+
+If you are loading the Vulkan loader dynamically instead of linking directly
+against it, you can check for the availability of a loader and ICD with @ref
+glfwVulkanSupported.
+
+@code
+if (glfwVulkanSupported())
+{
+    // Vulkan is available, at least for compute
+}
+@endcode
+
+This function returns `GLFW_TRUE` if the Vulkan loader and any minimally
+functional ICD was found.
+
+If one or both were not found, calling any other Vulkan related GLFW function
+will generate a @ref GLFW_API_UNAVAILABLE error.
+
+
+@subsection vulkan_proc Querying Vulkan function pointers
+
+To load any Vulkan core or extension function from the found loader, call @ref
+glfwGetInstanceProcAddress.  To load functions needed for instance creation,
+pass `NULL` as the instance.
+
+@code
+PFN_vkCreateInstance pfnCreateInstance = (PFN_vkCreateInstance)
+    glfwGetInstanceProcAddress(NULL, "vkCreateInstance");
+@endcode
+
+Once you have created an instance, you can load from it all other Vulkan core
+functions and functions from any instance extensions you enabled.
+
+@code
+PFN_vkCreateDevice pfnCreateDevice = (PFN_vkCreateDevice)
+    glfwGetInstanceProcAddress(instance, "vkCreateDevice");
+@endcode
+
+This function in turn calls `vkGetInstanceProcAddr`.  If that fails, the
+function falls back to a platform-specific query of the Vulkan loader (i.e.
+`dlsym` or `GetProcAddress`).  If that also fails, the function returns `NULL`.
+For more information about `vkGetInstanceProcAddr`, see the Vulkan
+documentation.
+
+Vulkan also provides `vkGetDeviceProcAddr` for loading device-specific versions
+of Vulkan function.  This function can be retrieved from an instance with @ref
+glfwGetInstanceProcAddress.
+
+@code
+PFN_vkGetDeviceProcAddr pfnGetDeviceProcAddr = (PFN_vkGetDeviceProcAddr)
+    glfwGetInstanceProcAddress(instance, "vkGetDeviceProcAddr");
+@endcode
+
+Device-specific functions may execute a little bit faster, due to not having to
+dispatch internally based on the device passed to them.  For more information
+about `vkGetDeviceProcAddr`, see the Vulkan documentation.
+
+
+@section vulkan_ext Querying required Vulkan extensions
+
+To do anything useful with Vulkan you need to create an instance.  If you want
+to use Vulkan to render to a window, you must enable the instance extensions
+GLFW requires to create Vulkan surfaces.
+
+To query the instance extensions required, call @ref
+glfwGetRequiredInstanceExtensions.
+
+@code
+uint32_t count;
+const char** extensions = glfwGetRequiredInstanceExtensions(&count);
+@endcode
+
+These extensions must all be enabled when creating instances that are going to
+be passed to @ref glfwGetPhysicalDevicePresentationSupport and @ref
+glfwCreateWindowSurface.  The set of extensions will vary depending on platform
+and may also vary depending on graphics drivers and other factors.
+
+If it fails it will return `NULL` and GLFW will not be able to create Vulkan
+window surfaces.  You can still use Vulkan for off-screen rendering and compute
+work.
+
+If successful the returned array will always include `VK_KHR_surface`, so if
+you don't require any additional extensions you can pass this list directly to
+the `VkInstanceCreateInfo` struct.
+
+@code
+VkInstanceCreateInfo ici;
+
+memset(&ici, 0, sizeof(ici));
+ici.enabledExtensionCount = count;
+ici.ppEnabledExtensionNames = extensions;
+...
+@endcode
+
+Additional extensions may be required by future versions of GLFW.  You should
+check whether any extensions you wish to enable are already in the returned
+array, as it is an error to specify an extension more than once in the
+`VkInstanceCreateInfo` struct.
+
+
+@section vulkan_present Querying for Vulkan presentation support
+
+Not every queue family of every Vulkan device can present images to surfaces.
+To check whether a specific queue family of a physical device supports image
+presentation without first having to create a window and surface, call @ref
+glfwGetPhysicalDevicePresentationSupport.
+
+@code
+if (glfwGetPhysicalDevicePresentationSupport(instance, physical_device, queue_family_index))
+{
+    // Queue family supports image presentation
+}
+@endcode
+
+The `VK_KHR_surface` extension additionally provides the
+`vkGetPhysicalDeviceSurfaceSupportKHR` function, which performs the same test on
+an existing Vulkan surface.
+
+
+@section vulkan_window Creating the window
+
+Unless you will be using OpenGL or OpenGL ES with the same window as Vulkan,
+there is no need to create a context.  You can disable context creation with the
+[GLFW_CLIENT_API](@ref GLFW_CLIENT_API_hint) hint.
+
+@code
+glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
+GLFWwindow* window = glfwCreateWindow(640, 480, "Window Title", NULL, NULL);
+@endcode
+
+See @ref context_less for more information.
+
+
+@section vulkan_surface Creating a Vulkan window surface
+
+You can create a Vulkan surface (as defined by the `VK_KHR_surface` extension)
+for a GLFW window with @ref glfwCreateWindowSurface.
+
+@code
+VkSurfaceKHR surface;
+VkResult err = glfwCreateWindowSurface(instance, window, NULL, &surface);
+if (err)
+{
+    // Window surface creation failed
+}
+@endcode
+
+If an OpenGL or OpenGL ES context was created on the window, the context has
+ownership of the presentation on the window and a Vulkan surface cannot be
+created.
+
+It is your responsibility to destroy the surface.  GLFW does not destroy it for
+you.  Call `vkDestroySurfaceKHR` function from the same extension to destroy it.
+
+*/

src/ThirdParty/glfw/examples/CMakeLists.txt

@@ -0,0 +1,88 @@
+
+link_libraries(glfw)
+
+include_directories("${GLFW_SOURCE_DIR}/deps")
+
+if (MATH_LIBRARY)
+    link_libraries("${MATH_LIBRARY}")
+endif()
+
+# Workaround for the MS CRT deprecating parts of the standard library
+if (MSVC OR CMAKE_C_SIMULATE_ID STREQUAL "MSVC")
+    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+endif()
+
+if (WIN32)
+    set(ICON glfw.rc)
+elseif (APPLE)
+    set(ICON glfw.icns)
+endif()
+
+set(GLAD_GL "${GLFW_SOURCE_DIR}/deps/glad/gl.h")
+set(GLAD_GLES2 "${GLFW_SOURCE_DIR}/deps/glad/gles2.h")
+set(GETOPT "${GLFW_SOURCE_DIR}/deps/getopt.h"
+           "${GLFW_SOURCE_DIR}/deps/getopt.c")
+set(TINYCTHREAD "${GLFW_SOURCE_DIR}/deps/tinycthread.h"
+                "${GLFW_SOURCE_DIR}/deps/tinycthread.c")
+
+add_executable(boing WIN32 MACOSX_BUNDLE boing.c ${ICON} ${GLAD_GL})
+add_executable(gears WIN32 MACOSX_BUNDLE gears.c ${ICON} ${GLAD_GL})
+add_executable(heightmap WIN32 MACOSX_BUNDLE heightmap.c ${ICON} ${GLAD_GL})
+add_executable(offscreen offscreen.c ${ICON} ${GLAD_GL})
+add_executable(particles WIN32 MACOSX_BUNDLE particles.c ${ICON} ${TINYCTHREAD} ${GETOPT} ${GLAD_GL})
+add_executable(sharing WIN32 MACOSX_BUNDLE sharing.c ${ICON} ${GLAD_GL})
+add_executable(splitview WIN32 MACOSX_BUNDLE splitview.c ${ICON} ${GLAD_GL})
+add_executable(triangle-opengl WIN32 MACOSX_BUNDLE triangle-opengl.c ${ICON} ${GLAD_GL})
+add_executable(triangle-opengles WIN32 MACOSX_BUNDLE triangle-opengles.c ${ICON} ${GLAD_GLES2})
+add_executable(wave WIN32 MACOSX_BUNDLE wave.c ${ICON} ${GLAD_GL})
+add_executable(windows WIN32 MACOSX_BUNDLE windows.c ${ICON} ${GLAD_GL})
+
+target_link_libraries(particles Threads::Threads)
+if (RT_LIBRARY)
+    target_link_libraries(particles "${RT_LIBRARY}")
+endif()
+
+set(GUI_ONLY_BINARIES boing gears heightmap particles sharing splitview
+    triangle-opengl triangle-opengles wave windows)
+set(CONSOLE_BINARIES offscreen)
+
+set_target_properties(${GUI_ONLY_BINARIES} ${CONSOLE_BINARIES} PROPERTIES
+                      C_STANDARD 99
+                      FOLDER "GLFW3/Examples")
+
+if (GLFW_USE_OSMESA)
+    find_package(OSMesa REQUIRED)
+    target_compile_definitions(offscreen PRIVATE USE_NATIVE_OSMESA)
+endif()
+
+if (MSVC)
+    # Tell MSVC to use main instead of WinMain
+    set_target_properties(${GUI_ONLY_BINARIES} PROPERTIES
+                          LINK_FLAGS "/ENTRY:mainCRTStartup")
+elseif (CMAKE_C_SIMULATE_ID STREQUAL "MSVC")
+    # Tell Clang using MS CRT to use main instead of WinMain
+    set_target_properties(${GUI_ONLY_BINARIES} PROPERTIES
+                          LINK_FLAGS "-Wl,/entry:mainCRTStartup")
+endif()
+
+if (APPLE)
+    set_target_properties(boing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Boing")
+    set_target_properties(gears PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Gears")
+    set_target_properties(heightmap PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Heightmap")
+    set_target_properties(particles PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Particles")
+    set_target_properties(sharing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Sharing")
+    set_target_properties(triangle-opengl PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "OpenGL Triangle")
+    set_target_properties(triangle-opengles PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "OpenGL ES Triangle")
+    set_target_properties(splitview PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "SplitView")
+    set_target_properties(wave PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Wave")
+    set_target_properties(windows PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Windows")
+
+    set_source_files_properties(glfw.icns PROPERTIES
+                                MACOSX_PACKAGE_LOCATION "Resources")
+    set_target_properties(${GUI_ONLY_BINARIES} PROPERTIES
+                          MACOSX_BUNDLE_SHORT_VERSION_STRING ${GLFW_VERSION}
+                          MACOSX_BUNDLE_LONG_VERSION_STRING ${GLFW_VERSION}
+                          MACOSX_BUNDLE_ICON_FILE glfw.icns
+                          MACOSX_BUNDLE_INFO_PLIST "${GLFW_SOURCE_DIR}/CMake/Info.plist.in")
+endif()
+

src/ThirdParty/glfw/examples/boing.c

@@ -0,0 +1,680 @@
+/*****************************************************************************
+ * Title:   GLBoing
+ * Desc:    Tribute to Amiga Boing.
+ * Author:  Jim Brooks  <gfx@jimbrooks.org>
+ *          Original Amiga authors were R.J. Mical and Dale Luck.
+ *          GLFW conversion by Marcus Geelnard
+ * Notes:   - 360' = 2*PI [radian]
+ *
+ *          - Distances between objects are created by doing a relative
+ *            Z translations.
+ *
+ *          - Although OpenGL enticingly supports alpha-blending,
+ *            the shadow of the original Boing didn't affect the color
+ *            of the grid.
+ *
+ *          - [Marcus] Changed timing scheme from interval driven to frame-
+ *            time based animation steps (which results in much smoother
+ *            movement)
+ *
+ * History of Amiga Boing:
+ *
+ * Boing was demonstrated on the prototype Amiga (codenamed "Lorraine") in
+ * 1985. According to legend, it was written ad-hoc in one night by
+ * R. J. Mical and Dale Luck. Because the bouncing ball animation was so fast
+ * and smooth, attendees did not believe the Amiga prototype was really doing
+ * the rendering. Suspecting a trick, they began looking around the booth for
+ * a hidden computer or VCR.
+ *****************************************************************************/
+
+#if defined(_MSC_VER)
+ // Make MS math.h define M_PI
+ #define _USE_MATH_DEFINES
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define GLAD_GL_IMPLEMENTATION
+#include <glad/gl.h>
+#define GLFW_INCLUDE_NONE
+#include <GLFW/glfw3.h>
+
+#include <linmath.h>
+
+
+/*****************************************************************************
+ * Various declarations and macros
+ *****************************************************************************/
+
+/* Prototypes */
+void init( void );
+void display( void );
+void reshape( GLFWwindow* window, int w, int h );
+void key_callback( GLFWwindow* window, int key, int scancode, int action, int mods );
+void mouse_button_callback( GLFWwindow* window, int button, int action, int mods );
+void cursor_position_callback( GLFWwindow* window, double x, double y );
+void DrawBoingBall( void );
+void BounceBall( double dt );
+void DrawBoingBallBand( GLfloat long_lo, GLfloat long_hi );
+void DrawGrid( void );
+
+#define RADIUS           70.f
+#define STEP_LONGITUDE   22.5f                   /* 22.5 makes 8 bands like original Boing */
+#define STEP_LATITUDE    22.5f
+
+#define DIST_BALL       (RADIUS * 2.f + RADIUS * 0.1f)
+
+#define VIEW_SCENE_DIST (DIST_BALL * 3.f + 200.f)/* distance from viewer to middle of boing area */
+#define GRID_SIZE       (RADIUS * 4.5f)          /* length (width) of grid */
+#define BOUNCE_HEIGHT   (RADIUS * 2.1f)
+#define BOUNCE_WIDTH    (RADIUS * 2.1f)
+
+#define SHADOW_OFFSET_X -20.f
+#define SHADOW_OFFSET_Y  10.f
+#define SHADOW_OFFSET_Z   0.f
+
+#define WALL_L_OFFSET   0.f
+#define WALL_R_OFFSET   5.f
+
+/* Animation speed (50.0 mimics the original GLUT demo speed) */
+#define ANIMATION_SPEED 50.f
+
+/* Maximum allowed delta time per physics iteration */
+#define MAX_DELTA_T 0.02f
+
+/* Draw ball, or its shadow */
+typedef enum { DRAW_BALL, DRAW_BALL_SHADOW } DRAW_BALL_ENUM;
+
+/* Vertex type */
+typedef struct {float x; float y; float z;} vertex_t;
+
+/* Global vars */
+int windowed_xpos, windowed_ypos, windowed_width, windowed_height;
+int width, height;
+GLfloat deg_rot_y       = 0.f;
+GLfloat deg_rot_y_inc   = 2.f;
+int override_pos        = GLFW_FALSE;
+GLfloat cursor_x        = 0.f;
+GLfloat cursor_y        = 0.f;
+GLfloat ball_x          = -RADIUS;
+GLfloat ball_y          = -RADIUS;
+GLfloat ball_x_inc      = 1.f;
+GLfloat ball_y_inc      = 2.f;
+DRAW_BALL_ENUM drawBallHow;
+double  t;
+double  t_old = 0.f;
+double  dt;
+
+/* Random number generator */
+#ifndef RAND_MAX
+ #define RAND_MAX 4095
+#endif
+
+
+/*****************************************************************************
+ * Truncate a degree.
+ *****************************************************************************/
+GLfloat TruncateDeg( GLfloat deg )
+{
+   if ( deg >= 360.f )
+      return (deg - 360.f);
+   else
+      return deg;
+}
+
+/*****************************************************************************
+ * Convert a degree (360-based) into a radian.
+ * 360' = 2 * PI
+ *****************************************************************************/
+double deg2rad( double deg )
+{
+   return deg / 360 * (2 * M_PI);
+}
+
+/*****************************************************************************
+ * 360' sin().
+ *****************************************************************************/
+double sin_deg( double deg )
+{
+   return sin( deg2rad( deg ) );
+}
+
+/*****************************************************************************
+ * 360' cos().
+ *****************************************************************************/
+double cos_deg( double deg )
+{
+   return cos( deg2rad( deg ) );
+}
+
+/*****************************************************************************
+ * Compute a cross product (for a normal vector).
+ *
+ * c = a x b
+ *****************************************************************************/
+void CrossProduct( vertex_t a, vertex_t b, vertex_t c, vertex_t *n )
+{
+   GLfloat u1, u2, u3;
+   GLfloat v1, v2, v3;
+
+   u1 = b.x - a.x;
+   u2 = b.y - a.y;
+   u3 = b.y - a.z;
+
+   v1 = c.x - a.x;
+   v2 = c.y - a.y;
+   v3 = c.z - a.z;
+
+   n->x = u2 * v3 - v2 * u3;
+   n->y = u3 * v1 - v3 * u1;
+   n->z = u1 * v2 - v1 * u2;
+}
+
+
+#define BOING_DEBUG 0
+
+
+/*****************************************************************************
+ * init()
+ *****************************************************************************/
+void init( void )
+{
+   /*
+    * Clear background.
+    */
+   glClearColor( 0.55f, 0.55f, 0.55f, 0.f );
+
+   glShadeModel( GL_FLAT );
+}
+
+
+/*****************************************************************************
+ * display()
+ *****************************************************************************/
+void display(void)
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+   glPushMatrix();
+
+   drawBallHow = DRAW_BALL_SHADOW;
+   DrawBoingBall();
+
+   DrawGrid();
+
+   drawBallHow = DRAW_BALL;
+   DrawBoingBall();
+
+   glPopMatrix();
+   glFlush();
+}
+
+
+/*****************************************************************************
+ * reshape()
+ *****************************************************************************/
+void reshape( GLFWwindow* window, int w, int h )
+{
+   mat4x4 projection, view;
+
+   glViewport( 0, 0, (GLsizei)w, (GLsizei)h );
+
+   glMatrixMode( GL_PROJECTION );
+   mat4x4_perspective( projection,
+                       2.f * (float) atan2( RADIUS, 200.f ),
+                       (float)w / (float)h,
+                       1.f, VIEW_SCENE_DIST );
+   glLoadMatrixf((const GLfloat*) projection);
+
+   glMatrixMode( GL_MODELVIEW );
+   {
+      vec3 eye = { 0.f, 0.f, VIEW_SCENE_DIST };
+      vec3 center = { 0.f, 0.f, 0.f };
+      vec3 up = { 0.f, -1.f, 0.f };
+      mat4x4_look_at( view, eye, center, up );
+   }
+   glLoadMatrixf((const GLfloat*) view);
+}
+
+void key_callback( GLFWwindow* window, int key, int scancode, int action, int mods )
+{
+    if (action != GLFW_PRESS)
+        return;
+
+    if (key == GLFW_KEY_ESCAPE && mods == 0)
+        glfwSetWindowShouldClose(window, GLFW_TRUE);
+    if ((key == GLFW_KEY_ENTER && mods == GLFW_MOD_ALT) ||
+        (key == GLFW_KEY_F11 && mods == GLFW_MOD_ALT))
+    {
+        if (glfwGetWindowMonitor(window))
+        {
+            glfwSetWindowMonitor(window, NULL,
+                                 windowed_xpos, windowed_ypos,
+                                 windowed_width, windowed_height, 0);
+        }
+        else
+        {
+            GLFWmonitor* monitor = glfwGetPrimaryMonitor();
+            if (monitor)
+            {
+                const GLFWvidmode* mode = glfwGetVideoMode(monitor);
+                glfwGetWindowPos(window, &windowed_xpos, &windowed_ypos);
+                glfwGetWindowSize(window, &windowed_width, &windowed_height);
+                glfwSetWindowMonitor(window, monitor, 0, 0, mode->width, mode->height, mode->refreshRate);
+            }
+        }
+    }
+}
+
+static void set_ball_pos ( GLfloat x, GLfloat y )
+{
+   ball_x = (width / 2) - x;
+   ball_y = y - (height / 2);
+}
+
+void mouse_button_callback( GLFWwindow* window, int button, int action, int mods )
+{
+   if (button != GLFW_MOUSE_BUTTON_LEFT)
+      return;
+
+   if (action == GLFW_PRESS)
+   {
+      override_pos = GLFW_TRUE;
+      set_ball_pos(cursor_x, cursor_y);
+   }
+   else
+   {
+      override_pos = GLFW_FALSE;
+   }
+}
+
+void cursor_position_callback( GLFWwindow* window, double x, double y )
+{
+   cursor_x = (float) x;
+   cursor_y = (float) y;
+
+   if ( override_pos )
+      set_ball_pos(cursor_x, cursor_y);
+}
+
+/*****************************************************************************
+ * Draw the Boing ball.
+ *
+ * The Boing ball is sphere in which each facet is a rectangle.
+ * Facet colors alternate between red and white.
+ * The ball is built by stacking latitudinal circles.  Each circle is composed
+ * of a widely-separated set of points, so that each facet is noticeably large.
+ *****************************************************************************/
+void DrawBoingBall( void )
+{
+   GLfloat lon_deg;     /* degree of longitude */
+   double dt_total, dt2;
+
+   glPushMatrix();
+   glMatrixMode( GL_MODELVIEW );
+
+  /*
+   * Another relative Z translation to separate objects.
+   */
+   glTranslatef( 0.0, 0.0, DIST_BALL );
+
+   /* Update ball position and rotation (iterate if necessary) */
+   dt_total = dt;
+   while( dt_total > 0.0 )
+   {
+       dt2 = dt_total > MAX_DELTA_T ? MAX_DELTA_T : dt_total;
+       dt_total -= dt2;
+       BounceBall( dt2 );
+       deg_rot_y = TruncateDeg( deg_rot_y + deg_rot_y_inc*((float)dt2*ANIMATION_SPEED) );
+   }
+
+   /* Set ball position */
+   glTranslatef( ball_x, ball_y, 0.0 );
+
+  /*
+   * Offset the shadow.
+   */
+   if ( drawBallHow == DRAW_BALL_SHADOW )
+   {
+      glTranslatef( SHADOW_OFFSET_X,
+                    SHADOW_OFFSET_Y,
+                    SHADOW_OFFSET_Z );
+   }
+
+  /*
+   * Tilt the ball.
+   */
+   glRotatef( -20.0, 0.0, 0.0, 1.0 );
+
+  /*
+   * Continually rotate ball around Y axis.
+   */
+   glRotatef( deg_rot_y, 0.0, 1.0, 0.0 );
+
+  /*
+   * Set OpenGL state for Boing ball.
+   */
+   glCullFace( GL_FRONT );
+   glEnable( GL_CULL_FACE );
+   glEnable( GL_NORMALIZE );
+
+  /*
+   * Build a faceted latitude slice of the Boing ball,
+   * stepping same-sized vertical bands of the sphere.
+   */
+   for ( lon_deg = 0;
+         lon_deg < 180;
+         lon_deg += STEP_LONGITUDE )
+   {
+     /*
+      * Draw a latitude circle at this longitude.
+      */
+      DrawBoingBallBand( lon_deg,
+                         lon_deg + STEP_LONGITUDE );
+   }
+
+   glPopMatrix();
+
+   return;
+}
+
+
+/*****************************************************************************
+ * Bounce the ball.
+ *****************************************************************************/
+void BounceBall( double delta_t )
+{
+   GLfloat sign;
+   GLfloat deg;
+
+   if ( override_pos )
+     return;
+
+   /* Bounce on walls */
+   if ( ball_x >  (BOUNCE_WIDTH/2 + WALL_R_OFFSET ) )
+   {
+      ball_x_inc = -0.5f - 0.75f * (GLfloat)rand() / (GLfloat)RAND_MAX;
+      deg_rot_y_inc = -deg_rot_y_inc;
+   }
+   if ( ball_x < -(BOUNCE_HEIGHT/2 + WALL_L_OFFSET) )
+   {
+      ball_x_inc =  0.5f + 0.75f * (GLfloat)rand() / (GLfloat)RAND_MAX;
+      deg_rot_y_inc = -deg_rot_y_inc;
+   }
+
+   /* Bounce on floor / roof */
+   if ( ball_y >  BOUNCE_HEIGHT/2      )
+   {
+      ball_y_inc = -0.75f - 1.f * (GLfloat)rand() / (GLfloat)RAND_MAX;
+   }
+   if ( ball_y < -BOUNCE_HEIGHT/2*0.85 )
+   {
+      ball_y_inc =  0.75f + 1.f * (GLfloat)rand() / (GLfloat)RAND_MAX;
+   }
+
+   /* Update ball position */
+   ball_x += ball_x_inc * ((float)delta_t*ANIMATION_SPEED);
+   ball_y += ball_y_inc * ((float)delta_t*ANIMATION_SPEED);
+
+  /*
+   * Simulate the effects of gravity on Y movement.
+   */
+   if ( ball_y_inc < 0 ) sign = -1.0; else sign = 1.0;
+
+   deg = (ball_y + BOUNCE_HEIGHT/2) * 90 / BOUNCE_HEIGHT;
+   if ( deg > 80 ) deg = 80;
+   if ( deg < 10 ) deg = 10;
+
+   ball_y_inc = sign * 4.f * (float) sin_deg( deg );
+}
+
+
+/*****************************************************************************
+ * Draw a faceted latitude band of the Boing ball.
+ *
+ * Parms:   long_lo, long_hi
+ *          Low and high longitudes of slice, resp.
+ *****************************************************************************/
+void DrawBoingBallBand( GLfloat long_lo,
+                        GLfloat long_hi )
+{
+   vertex_t vert_ne;            /* "ne" means south-east, so on */
+   vertex_t vert_nw;
+   vertex_t vert_sw;
+   vertex_t vert_se;
+   vertex_t vert_norm;
+   GLfloat  lat_deg;
+   static int colorToggle = 0;
+
+  /*
+   * Iterate through the points of a latitude circle.
+   * A latitude circle is a 2D set of X,Z points.
+   */
+   for ( lat_deg = 0;
+         lat_deg <= (360 - STEP_LATITUDE);
+         lat_deg += STEP_LATITUDE )
+   {
+     /*
+      * Color this polygon with red or white.
+      */
+      if ( colorToggle )
+         glColor3f( 0.8f, 0.1f, 0.1f );
+      else
+         glColor3f( 0.95f, 0.95f, 0.95f );
+#if 0
+      if ( lat_deg >= 180 )
+         if ( colorToggle )
+            glColor3f( 0.1f, 0.8f, 0.1f );
+         else
+            glColor3f( 0.5f, 0.5f, 0.95f );
+#endif
+      colorToggle = ! colorToggle;
+
+     /*
+      * Change color if drawing shadow.
+      */
+      if ( drawBallHow == DRAW_BALL_SHADOW )
+         glColor3f( 0.35f, 0.35f, 0.35f );
+
+     /*
+      * Assign each Y.
+      */
+      vert_ne.y = vert_nw.y = (float) cos_deg(long_hi) * RADIUS;
+      vert_sw.y = vert_se.y = (float) cos_deg(long_lo) * RADIUS;
+
+     /*
+      * Assign each X,Z with sin,cos values scaled by latitude radius indexed by longitude.
+      * Eg, long=0 and long=180 are at the poles, so zero scale is sin(longitude),
+      * while long=90 (sin(90)=1) is at equator.
+      */
+      vert_ne.x = (float) cos_deg( lat_deg                 ) * (RADIUS * (float) sin_deg( long_lo + STEP_LONGITUDE ));
+      vert_se.x = (float) cos_deg( lat_deg                 ) * (RADIUS * (float) sin_deg( long_lo                  ));
+      vert_nw.x = (float) cos_deg( lat_deg + STEP_LATITUDE ) * (RADIUS * (float) sin_deg( long_lo + STEP_LONGITUDE ));
+      vert_sw.x = (float) cos_deg( lat_deg + STEP_LATITUDE ) * (RADIUS * (float) sin_deg( long_lo                  ));
+
+      vert_ne.z = (float) sin_deg( lat_deg                 ) * (RADIUS * (float) sin_deg( long_lo + STEP_LONGITUDE ));
+      vert_se.z = (float) sin_deg( lat_deg                 ) * (RADIUS * (float) sin_deg( long_lo                  ));
+      vert_nw.z = (float) sin_deg( lat_deg + STEP_LATITUDE ) * (RADIUS * (float) sin_deg( long_lo + STEP_LONGITUDE ));
+      vert_sw.z = (float) sin_deg( lat_deg + STEP_LATITUDE ) * (RADIUS * (float) sin_deg( long_lo                  ));
+
+     /*
+      * Draw the facet.
+      */
+      glBegin( GL_POLYGON );
+
+      CrossProduct( vert_ne, vert_nw, vert_sw, &vert_norm );
+      glNormal3f( vert_norm.x, vert_norm.y, vert_norm.z );
+
+      glVertex3f( vert_ne.x, vert_ne.y, vert_ne.z );
+      glVertex3f( vert_nw.x, vert_nw.y, vert_nw.z );
+      glVertex3f( vert_sw.x, vert_sw.y, vert_sw.z );
+      glVertex3f( vert_se.x, vert_se.y, vert_se.z );
+
+      glEnd();
+
+#if BOING_DEBUG
+      printf( "----------------------------------------------------------- \n" );
+      printf( "lat = %f  long_lo = %f  long_hi = %f \n", lat_deg, long_lo, long_hi );
+      printf( "vert_ne  x = %.8f  y = %.8f  z = %.8f \n", vert_ne.x, vert_ne.y, vert_ne.z );
+      printf( "vert_nw  x = %.8f  y = %.8f  z = %.8f \n", vert_nw.x, vert_nw.y, vert_nw.z );
+      printf( "vert_se  x = %.8f  y = %.8f  z = %.8f \n", vert_se.x, vert_se.y, vert_se.z );
+      printf( "vert_sw  x = %.8f  y = %.8f  z = %.8f \n", vert_sw.x, vert_sw.y, vert_sw.z );
+#endif
+
+   }
+
+  /*
+   * Toggle color so that next band will opposite red/white colors than this one.
+   */
+   colorToggle = ! colorToggle;
+
+  /*
+   * This circular band is done.
+   */
+   return;
+}
+
+
+/*****************************************************************************
+ * Draw the purple grid of lines, behind the Boing ball.
+ * When the Workbench is dropped to the bottom, Boing shows 12 rows.
+ *****************************************************************************/
+void DrawGrid( void )
+{
+   int              row, col;
+   const int        rowTotal    = 12;                   /* must be divisible by 2 */
+   const int        colTotal    = rowTotal;             /* must be same as rowTotal */
+   const GLfloat    widthLine   = 2.0;                  /* should be divisible by 2 */
+   const GLfloat    sizeCell    = GRID_SIZE / rowTotal;
+   const GLfloat    z_offset    = -40.0;
+   GLfloat          xl, xr;
+   GLfloat          yt, yb;
+
+   glPushMatrix();
+   glDisable( GL_CULL_FACE );
+
+  /*
+   * Another relative Z translation to separate objects.
+   */
+   glTranslatef( 0.0, 0.0, DIST_BALL );
+
+  /*
+   * Draw vertical lines (as skinny 3D rectangles).
+   */
+   for ( col = 0; col <= colTotal; col++ )
+   {
+     /*
+      * Compute co-ords of line.
+      */
+      xl = -GRID_SIZE / 2 + col * sizeCell;
+      xr = xl + widthLine;
+
+      yt =  GRID_SIZE / 2;
+      yb = -GRID_SIZE / 2 - widthLine;
+
+      glBegin( GL_POLYGON );
+
+      glColor3f( 0.6f, 0.1f, 0.6f );               /* purple */
+
+      glVertex3f( xr, yt, z_offset );       /* NE */
+      glVertex3f( xl, yt, z_offset );       /* NW */
+      glVertex3f( xl, yb, z_offset );       /* SW */
+      glVertex3f( xr, yb, z_offset );       /* SE */
+
+      glEnd();
+   }
+
+  /*
+   * Draw horizontal lines (as skinny 3D rectangles).
+   */
+   for ( row = 0; row <= rowTotal; row++ )
+   {
+     /*
+      * Compute co-ords of line.
+      */
+      yt = GRID_SIZE / 2 - row * sizeCell;
+      yb = yt - widthLine;
+
+      xl = -GRID_SIZE / 2;
+      xr =  GRID_SIZE / 2 + widthLine;
+
+      glBegin( GL_POLYGON );
+
+      glColor3f( 0.6f, 0.1f, 0.6f );               /* purple */
+
+      glVertex3f( xr, yt, z_offset );       /* NE */
+      glVertex3f( xl, yt, z_offset );       /* NW */
+      glVertex3f( xl, yb, z_offset );       /* SW */
+      glVertex3f( xr, yb, z_offset );       /* SE */
+
+      glEnd();
+   }
+
+   glPopMatrix();
+
+   return;
+}
+
+
+/*======================================================================*
+ * main()
+ *======================================================================*/
+
+int main( void )
+{
+   GLFWwindow* window;
+
+   /* Init GLFW */
+   if( !glfwInit() )
+      exit( EXIT_FAILURE );
+
+   window = glfwCreateWindow( 400, 400, "Boing (classic Amiga demo)", NULL, NULL );
+   if (!window)
+   {
+       glfwTerminate();
+       exit( EXIT_FAILURE );
+   }
+
+   glfwSetWindowAspectRatio(window, 1, 1);
+
+   glfwSetFramebufferSizeCallback(window, reshape);
+   glfwSetKeyCallback(window, key_callback);
+   glfwSetMouseButtonCallback(window, mouse_button_callback);
+   glfwSetCursorPosCallback(window, cursor_position_callback);
+
+   glfwMakeContextCurrent(window);
+   gladLoadGL(glfwGetProcAddress);
+   glfwSwapInterval( 1 );
+
+   glfwGetFramebufferSize(window, &width, &height);
+   reshape(window, width, height);
+
+   glfwSetTime( 0.0 );
+
+   init();
+
+   /* Main loop */
+   for (;;)
+   {
+       /* Timing */
+       t = glfwGetTime();
+       dt = t - t_old;
+       t_old = t;
+
+       /* Draw one frame */
+       display();
+
+       /* Swap buffers */
+       glfwSwapBuffers(window);
+       glfwPollEvents();
+
+       /* Check if we are still running */
+       if (glfwWindowShouldClose(window))
+           break;
+   }
+
+   glfwTerminate();
+   exit( EXIT_SUCCESS );
+}
+

src/ThirdParty/glfw/examples/gears.c

@@ -0,0 +1,361 @@
+/*
+ * 3-D gear wheels.  This program is in the public domain.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *    -exit      automatically exit after 30 seconds
+ *
+ *
+ * Brian Paul
+ *
+ *
+ * Marcus Geelnard:
+ *   - Conversion to GLFW
+ *   - Time based rendering (frame rate independent)
+ *   - Slightly modified camera that should work better for stereo viewing
+ *
+ *
+ * Camilla Löwy:
+ *   - Removed FPS counter (this is not a benchmark)
+ *   - Added a few comments
+ *   - Enabled vsync
+ */
+
+#if defined(_MSC_VER)
+ // Make MS math.h define M_PI
+ #define _USE_MATH_DEFINES
+#endif
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define GLAD_GL_IMPLEMENTATION
+#include <glad/gl.h>
+#define GLFW_INCLUDE_NONE
+#include <GLFW/glfw3.h>
+
+/**
+
+  Draw a gear wheel.  You'll probably want to call this function when
+  building a display list since we do a lot of trig here.
+
+  Input:  inner_radius - radius of hole at center
+          outer_radius - radius at center of teeth
+          width - width of gear teeth - number of teeth
+          tooth_depth - depth of tooth
+
+ **/
+
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+  GLint teeth, GLfloat tooth_depth)
+{
+  GLint i;
+  GLfloat r0, r1, r2;
+  GLfloat angle, da;
+  GLfloat u, v, len;
+
+  r0 = inner_radius;
+  r1 = outer_radius - tooth_depth / 2.f;
+  r2 = outer_radius + tooth_depth / 2.f;
+
+  da = 2.f * (float) M_PI / teeth / 4.f;
+
+  glShadeModel(GL_FLAT);
+
+  glNormal3f(0.f, 0.f, 1.f);
+
+  /* draw front face */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+    glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), width * 0.5f);
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), width * 0.5f);
+    if (i < teeth) {
+      glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), width * 0.5f);
+      glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), width * 0.5f);
+    }
+  }
+  glEnd();
+
+  /* draw front sides of teeth */
+  glBegin(GL_QUADS);
+  da = 2.f * (float) M_PI / teeth / 4.f;
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + da), r2 * (float) sin(angle + da), width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + 2 * da), r2 * (float) sin(angle + 2 * da), width * 0.5f);
+    glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), width * 0.5f);
+  }
+  glEnd();
+
+  glNormal3f(0.0, 0.0, -1.0);
+
+  /* draw back face */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), -width * 0.5f);
+    glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), -width * 0.5f);
+    if (i < teeth) {
+      glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), -width * 0.5f);
+      glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), -width * 0.5f);
+    }
+  }
+  glEnd();
+
+  /* draw back sides of teeth */
+  glBegin(GL_QUADS);
+  da = 2.f * (float) M_PI / teeth / 4.f;
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+
+    glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), -width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + 2 * da), r2 * (float) sin(angle + 2 * da), -width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + da), r2 * (float) sin(angle + da), -width * 0.5f);
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), -width * 0.5f);
+  }
+  glEnd();
+
+  /* draw outward faces of teeth */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i < teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), width * 0.5f);
+    glVertex3f(r1 * (float) cos(angle), r1 * (float) sin(angle), -width * 0.5f);
+    u = r2 * (float) cos(angle + da) - r1 * (float) cos(angle);
+    v = r2 * (float) sin(angle + da) - r1 * (float) sin(angle);
+    len = (float) sqrt(u * u + v * v);
+    u /= len;
+    v /= len;
+    glNormal3f(v, -u, 0.0);
+    glVertex3f(r2 * (float) cos(angle + da), r2 * (float) sin(angle + da), width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + da), r2 * (float) sin(angle + da), -width * 0.5f);
+    glNormal3f((float) cos(angle), (float) sin(angle), 0.f);
+    glVertex3f(r2 * (float) cos(angle + 2 * da), r2 * (float) sin(angle + 2 * da), width * 0.5f);
+    glVertex3f(r2 * (float) cos(angle + 2 * da), r2 * (float) sin(angle + 2 * da), -width * 0.5f);
+    u = r1 * (float) cos(angle + 3 * da) - r2 * (float) cos(angle + 2 * da);
+    v = r1 * (float) sin(angle + 3 * da) - r2 * (float) sin(angle + 2 * da);
+    glNormal3f(v, -u, 0.f);
+    glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), width * 0.5f);
+    glVertex3f(r1 * (float) cos(angle + 3 * da), r1 * (float) sin(angle + 3 * da), -width * 0.5f);
+    glNormal3f((float) cos(angle), (float) sin(angle), 0.f);
+  }
+
+  glVertex3f(r1 * (float) cos(0), r1 * (float) sin(0), width * 0.5f);
+  glVertex3f(r1 * (float) cos(0), r1 * (float) sin(0), -width * 0.5f);
+
+  glEnd();
+
+  glShadeModel(GL_SMOOTH);
+
+  /* draw inside radius cylinder */
+  glBegin(GL_QUAD_STRIP);
+  for (i = 0; i <= teeth; i++) {
+    angle = i * 2.f * (float) M_PI / teeth;
+    glNormal3f(-(float) cos(angle), -(float) sin(angle), 0.f);
+    glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), -width * 0.5f);
+    glVertex3f(r0 * (float) cos(angle), r0 * (float) sin(angle), width * 0.5f);
+  }
+  glEnd();
+
+}
+
+
+static GLfloat view_rotx = 20.f, view_roty = 30.f, view_rotz = 0.f;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.f;
+
+/* OpenGL draw function & timing */
+static void draw(void)
+{
+  glClearColor(0.0, 0.0, 0.0, 0.0);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glPushMatrix();
+    glRotatef(view_rotx, 1.0, 0.0, 0.0);
+    glRotatef(view_roty, 0.0, 1.0, 0.0);
+    glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+    glPushMatrix();
+      glTranslatef(-3.0, -2.0, 0.0);
+      glRotatef(angle, 0.0, 0.0, 1.0);
+      glCallList(gear1);
+    glPopMatrix();
+
+    glPushMatrix();
+      glTranslatef(3.1f, -2.f, 0.f);
+      glRotatef(-2.f * angle - 9.f, 0.f, 0.f, 1.f);
+      glCallList(gear2);
+    glPopMatrix();
+
+    glPushMatrix();
+      glTranslatef(-3.1f, 4.2f, 0.f);
+      glRotatef(-2.f * angle - 25.f, 0.f, 0.f, 1.f);
+      glCallList(gear3);
+    glPopMatrix();
+
+  glPopMatrix();
+}
+
+
+/* update animation parameters */
+static void animate(void)
+{
+  angle = 100.f * (float) glfwGetTime();
+}
+
+
+/* change view angle, exit upon ESC */
+void key( GLFWwindow* window, int k, int s, int action, int mods )
+{
+  if( action != GLFW_PRESS ) return;
+
+  switch (k) {
+  case GLFW_KEY_Z:
+    if( mods & GLFW_MOD_SHIFT )
+      view_rotz -= 5.0;
+    else
+      view_rotz += 5.0;
+    break;
+  case GLFW_KEY_ESCAPE:
+    glfwSetWindowShouldClose(window, GLFW_TRUE);
+    break;
+  case GLFW_KEY_UP:
+    view_rotx += 5.0;
+    break;
+  case GLFW_KEY_DOWN:
+    view_rotx -= 5.0;
+    break;
+  case GLFW_KEY_LEFT:
+    view_roty += 5.0;
+    break;
+  case GLFW_KEY_RIGHT:
+    view_roty -= 5.0;
+    break;
+  default:
+    return;
+  }
+}
+
+
+/* new window size */
+void reshape( GLFWwindow* window, int width, int height )
+{
+  GLfloat h = (GLfloat) height / (GLfloat) width;
+  GLfloat xmax, znear, zfar;
+
+  znear = 5.0f;
+  zfar  = 30.0f;
+  xmax  = znear * 0.5f;
+
+  glViewport( 0, 0, (GLint) width, (GLint) height );
+  glMatrixMode( GL_PROJECTION );
+  glLoadIdentity();
+  glFrustum( -xmax, xmax, -xmax*h, xmax*h, znear, zfar );
+  glMatrixMode( GL_MODELVIEW );
+  glLoadIdentity();
+  glTranslatef( 0.0, 0.0, -20.0 );
+}
+
+
+/* program & OpenGL initialization */
+static void init(void)
+{
+  static GLfloat pos[4] = {5.f, 5.f, 10.f, 0.f};
+  static GLfloat red[4] = {0.8f, 0.1f, 0.f, 1.f};
+  static GLfloat green[4] = {0.f, 0.8f, 0.2f, 1.f};
+  static GLfloat blue[4] = {0.2f, 0.2f, 1.f, 1.f};
+
+  glLightfv(GL_LIGHT0, GL_POSITION, pos);
+  glEnable(GL_CULL_FACE);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_LIGHT0);
+  glEnable(GL_DEPTH_TEST);
+
+  /* make the gears */
+  gear1 = glGenLists(1);
+  glNewList(gear1, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+  gear(1.f, 4.f, 1.f, 20, 0.7f);
+  glEndList();
+
+  gear2 = glGenLists(1);
+  glNewList(gear2, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+  gear(0.5f, 2.f, 2.f, 10, 0.7f);
+  glEndList();
+
+  gear3 = glGenLists(1);
+  glNewList(gear3, GL_COMPILE);
+  glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+  gear(1.3f, 2.f, 0.5f, 10, 0.7f);
+  glEndList();
+
+  glEnable(GL_NORMALIZE);
+}
+
+
+/* program entry */
+int main(int argc, char *argv[])
+{
+    GLFWwindow* window;
+    int width, height;
+
+    if( !glfwInit() )
+    {
+        fprintf( stderr, "Failed to initialize GLFW\n" );
+        exit( EXIT_FAILURE );
+    }
+
+    glfwWindowHint(GLFW_DEPTH_BITS, 16);
+    glfwWindowHint(GLFW_TRANSPARENT_FRAMEBUFFER, GLFW_TRUE);
+
+    window = glfwCreateWindow( 300, 300, "Gears", NULL, NULL );
+    if (!window)
+    {
+        fprintf( stderr, "Failed to open GLFW window\n" );
+        glfwTerminate();
+        exit( EXIT_FAILURE );
+    }
+
+    // Set callback functions
+    glfwSetFramebufferSizeCallback(window, reshape);
+    glfwSetKeyCallback(window, key);
+
+    glfwMakeContextCurrent(window);
+    gladLoadGL(glfwGetProcAddress);
+    glfwSwapInterval( 1 );
+
+    glfwGetFramebufferSize(window, &width, &height);
+    reshape(window, width, height);
+
+    // Parse command-line options
+    init();
+
+    // Main loop
+    while( !glfwWindowShouldClose(window) )
+    {
+        // Draw gears
+        draw();
+
+        // Update animation
+        animate();
+
+        // Swap buffers
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+
+    // Terminate GLFW
+    glfwTerminate();
+
+    // Exit program
+    exit( EXIT_SUCCESS );
+}
+