A drawing engine may support a texture mapping filter mode that determines how a drawing engine performs texture mapping. You specify an engine's texture filter by assigning a value to its kQATag_TextureFilter state variable. The default value of this variable for a drawing engine that supports texture mapping is kQATextureFilter_Fast .
#define kQATextureFilter_Fast 0
#define kQATextureFilter_Mid 1
#define kQATextureFilter_Best 2