SDL_SetTextureAlphaMod - Man Page

#include <SDL3/SDL_render.h>

bool SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha);

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 false if alpha modulation is not supported.

texture

the texture to update.

alpha

the source alpha value multiplied into copy operations.

for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_GetTextureAlphaMod(3), SDL_SetTextureAlphaModFloat(3), SDL_SetTextureColorMod(3)

SDL_GetTextureAlphaMod(3), SDL_SetTextureAlphaModFloat(3), SDL_SetTextureColorMod(3).