GUI

SQCSim2021/textureatlas.h

@@ -0,0 +1,45 @@
+#ifndef TEXTUREATLAS_H__
+#define TEXTUREATLAS_H__
+#include "define.h"
+#include <string>
+#include <map>
+#include <IL/ilu.h>
+
+class TextureAtlas
+{
+public:
+    typedef unsigned int TextureIndex;
+
+public:
+    TextureAtlas(unsigned int nbTexture);
+    ~TextureAtlas();
+    TextureIndex AddTexture(const std::string& fname);
+    bool Generate(int textureSize, bool mipmap);
+
+    bool IsValid() const;
+    void Bind() const;
+
+    void TextureIndexToCoord(TextureIndex idx, float& u, float& v, float& w, float& h) const;
+
+private:
+    bool IsPowerOfTwo(unsigned int x) { return ((x != 0) && ((x & (~x + 1)) == x)); }
+
+private:
+    struct TextureInfo {
+        ILuint texId;
+        TextureIndex texIdx;
+
+        TextureInfo(ILuint _texId, unsigned int _texIdx) : texId(_texId), texIdx(_texIdx) {}
+    };
+    // On utilise un std::map pour avoir des valeurs uniques
+    typedef std::map<std::string, TextureInfo> TextureList;
+    TextureList m_textureList;
+
+    TextureIndex m_currentTextureIndex;
+    GLuint  m_textureId;
+    bool    m_isValid;
+    unsigned int m_nbTexturePerSide;
+
+};
+
+#endif // TEXTUREATLAS_H__