// enum TexEnvFlags
// {
//     Alpha    = 0x20000,
//     Software = 0x40000,
//     MipMap   = 0x80000
// }

struct gfxBitmap
{
    void *lpAlloc;
    short Width;
    short Height;
    IDirectDrawSurface7 *DDrawSurface;
    unsigned int RefCount;
    gfxBitmap *PreviousBitmap;
};
 
struct gfxImage
{
    enum gfxImageFormat
    {
        ARGB_8888 = 1,
        RGB_0888  = 2,
        ARGB_1555 = 3,
        RGB_0555  = 4, // 555 or 565
        Palette8  = 5,
        Palette4  = 6,
    };

    short Width;
    short Height;
    short Size;
    short Type; // gfxImageFormat
    unsigned int TexEnv;
    void *lpImage;
    unsigned int *Array14;
    unsigned int RefCount;
    gfxImage *PreviousImage;
    unsigned int dword20;
    unsigned int dword24;
};

struct gfxTexture
{
    unsigned int VglBindIndex;
    const char *Name;
    unsigned short Width;
    unsigned short Height;
    unsigned int TexEnv;
    unsigned int DominantColor;
    IDirectDrawSurface7 *DirectDrawSurface;
    IDirectDrawPalette *DirectDrawPalette;
    gfxTextureCacheEntry *CacheEntry;
    gfxTextureCachePool *CachePool;
    unsigned int RefCount;
    gfxTexture *PrevLOD;
    gfxTexture *NextLOD;
    unsigned char MaxLODCount;
    unsigned char LODCount;
};

struct gfxTextureCachePool
{
    unsigned short Width;
    unsigned short Height;
    unsigned short MipMapCount;
    unsigned short TextureCount;
    unsigned short EntryCount;
    unsigned short HasNoSurface;
    gfxTextureCacheEntry *FirstEntry;
    gfxTextureCachePool *PrevPool;
    DDPIXELFORMAT PixelFormat;
};

struct gfxTextureCacheEntry
{
    gfxTexture *GfxTexture;
    IDirectDrawSurface7 *DirectDrawSurface;
    unsigned int LastAccessTime;
    gfxTextureCacheEntry *PrevEntry;
};