SDL_SetSurfaceAlphaMod - Man Page

Defined in SDL3/SDL_surface.h

#include "SDL3/SDL.h"

bool SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha);

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.

Returns true on success or false on failure; call

SDL_GetError () for more information.

This function is available since SDL 3.2.0.

·(3), SDL_GetSurfaceAlphaMod(3), ·(3), SDL_SetSurfaceColorMod(3)

SDL_GetSurfaceAlphaMod(3), SDL_SetSurfaceColorMod(3).