table of contents
SDL_SetSurfaceAlphaMod(3) | SDL3 FUNCTIONS | SDL_SetSurfaceAlphaMod(3) |
NAME¶
SDL_SetSurfaceAlphaMod - Set an additional alpha value used in blit operations.
HEADER FILE¶
Defined in SDL3/SDL_surface.h
SYNOPSIS¶
#include "SDL3/SDL.h"
int 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¶
RETURN VALUE¶
Returns 0 on success or a negative error code on failure; call
SDL_GetError () for more information.
AVAILABILITY¶
This function is available since SDL 3.0.0.
SEE ALSO¶
SDL 3.1.2 | Simple Directmedia Layer |