====== (This is the documentation for SDL3, which is under heavy development and the API is changing! [https://wiki.libsdl.org/SDL2/ SDL2] is the current stable version!) ====== = SDL_SetTextureAlphaMod = Set an additional alpha value multiplied into render copy operations. == Syntax == int SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha); == Function Parameters == {| |'''texture''' |the texture to update |- |'''alpha''' |the source alpha value multiplied into copy operations |} == Return Value == Returns 0 on success or a negative error code on failure; call [[SDL_GetError]]() for more information. == Remarks == When this texture is rendered, during the copy operation the source alpha value is modulated by this alpha value according to the following formula: srcA = srcA * (alpha / 255) Alpha modulation is not always supported by the renderer; it will return -1 if alpha modulation is not supported. == Version == This function is available since SDL 3.0.0. == Related Functions == :[[SDL_GetTextureAlphaMod]] :[[SDL_SetTextureColorMod]] ---- [[CategoryAPI]], [[CategoryRender]]