Enum: EXT sRGB Texture (Version21) [done!]

        // add to Enum: PixelInternalFormat
        Srgb = ( (int) 0x8c40 ),
        Srgb8 = ( (int) 0x8c41 ),
        SrgbAlpha = ( (int) 0x8c42 ),
        Srgb8Alpha8 = ( (int) 0x8c43 ),
        SluminanceAlpha = ( (int) 0x8c44 ),
        Sluminance8Alpha8 = ( (int) 0x8c45 ),
        Sluminance = ( (int) 0x8c46 ),
        Sluminance8 = ( (int) 0x8c47 ),
        CompressedSrgb = ( (int) 0x8c48 ),
        CompressedSrgbAlpha = ( (int) 0x8c49 ),
        CompressedSluminance = ( (int) 0x8c4a ),
        CompressedSluminanceAlpha = ( (int) 0x8c4b ),
 
        CompressedSrgbS3tcDxt1 = ( (int) 0x8C4C ), // format only valid for 2D Textures
        CompressedSrgbAlphaS3tcDxt1 = ( (int) 0x8C4D ), // format only valid for 2D Textures
        CompressedSrgbAlphaS3tcDxt3 = ( (int) 0x8C4E ), // format only valid for 2D Textures
        CompressedSrgbAlphaS3tcDxt5 = ( (int) 0x8C4F ), // format only valid for 2D Textures