NAME

       SDL_SetSurfaceAlphaMod - Set an additional alpha value used in blit operations.

SYNOPSIS

       #include <SDL3/SDL_surface.h>

       bool SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha);

DESCRIPTION

       When this surface is blitted, during the blit operation the source alpha value is modulated by this alpha
       value according to the following formula:

       srcA = srcA * (alpha / 255)

FUNCTION PARAMETERS

       surface
              the SDL_Surface structure to update.

       alpha  the alpha value multiplied into blit operations.

RETURN VALUE

       for more information.

THREAD SAFETY

       This function is not thread safe.

AVAILABILITY

       This function is available since SDL 3.2.0.

SEE ALSO

       SDL_GetSurfaceAlphaMod(3), SDL_SetSurfaceColorMod(3)

Simple Directmedia Layer                           SDL 3.2.26                          SDL_SetSurfaceAlphaMod(3)