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

       This function is available since SDL 3.2.0.

       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)

surface
              the SDL_Surface
               structure to update.

       alpha  the alpha value multiplied into blit operations.

       Defined in SDL3/SDL_surface.h

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

       Returns true on success or false on failure; call

       SDL_GetError () for more information.

•(3), SDL_GetSurfaceAlphaMod(3), •(3), SDL_SetSurfaceColorMod(3)

Simple Directmedia Layer                           SDL 3.2.10                          SDL_SetSurfaceAlphaMod(3)

#include"SDL3/SDL.h"boolSDL_SetSurfaceAlphaMod(SDL_Surface*surface,Uint8alpha);

       This function is not thread safe.