Add everything.

src/Textures/Texture.cpp

@@ -0,0 +1,72 @@
+#include "../../include/Textures/Texture.h"
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "../../include/ThirdParty/stb_image.h"
+
+#include <iostream>
+
+Texture::Texture(const std::string& path,
+                 GLenum wrapS,
+                 GLenum wrapT,
+                 GLenum minFilter,
+                 GLenum magFilter)
+{
+    stbi_set_flip_vertically_on_load(1);
+    unsigned char* data = stbi_load(path.c_str(), &m_Width, &m_Height, &m_Channels, 0);
+    if (!data) {
+        std::cerr << "Failed to load texture: " << path << "\n";
+        return;
+    }
+
+    // choose formats based on channels
+    if (m_Channels == 1) {
+        m_InternalFormat = m_DataFormat = GL_RED;
+    } else if (m_Channels == 3) {
+        m_InternalFormat = GL_RGB8;
+        m_DataFormat = GL_RGB;
+    } else if (m_Channels == 4) {
+        m_InternalFormat = GL_RGBA8;
+        m_DataFormat = GL_RGBA;
+    } else {
+        // fallback
+        m_InternalFormat = GL_RGBA8;
+        m_DataFormat = GL_RGBA;
+    }
+
+    glGenTextures(1, &m_ID);
+    glBindTexture(GL_TEXTURE_2D, m_ID);
+
+    // upload
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glTexImage2D(GL_TEXTURE_2D, 0, m_InternalFormat, m_Width, m_Height, 0, m_DataFormat, GL_UNSIGNED_BYTE, data);
+    glGenerateMipmap(GL_TEXTURE_2D);
+
+    // params
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapS);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    stbi_image_free(data);
+}
+
+Texture::~Texture()
+{
+    if (m_ID) {
+        glDeleteTextures(1, &m_ID);
+        m_ID = 0;
+    }
+}
+
+void Texture::Bind(GLenum unit) const
+{
+    glActiveTexture(unit);
+    glBindTexture(GL_TEXTURE_2D, m_ID);
+}
+
+void Texture::Unbind() const
+{
+    glBindTexture(GL_TEXTURE_2D, 0);
+}