The texture channel modulation used in SDL_RenderCopy().
Defined in [SDL_render.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_render.h), but apps should _only_ `#include "SDL.h"`!
typedef enum SDL_TextureModulate
{0x00000000, /**< No modulation */
SDL_TEXTUREMODULATE_NONE = 0x00000001, /**< srcC = srcC * color */
SDL_TEXTUREMODULATE_COLOR = 0x00000002 /**< srcA = srcA * alpha */
SDL_TEXTUREMODULATE_ALPHA = } SDL_TextureModulate;
CategoryAPI, CategoryAPIEnum, CategoryEnum, CategoryRender