Get the additional alpha value used in blit operations.
int SDL_GetSurfaceAlphaMod(SDL_Surface *surface,
Uint8 *alpha);
surface | the SDL_Surface structure to query |
alpha | a pointer filled in with the current alpha value |
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
This function is available since SDL 3.0.0.