SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)

SDL_GetSurfaceAlphaMod

Get the additional alpha value used in blit operations.

Syntax

int SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
                           Uint8 * alpha);

Function Parameters

surface

the SDL_Surface structure to query

alpha

a pointer filled in with the current alpha value

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

Version

This function is available since SDL 2.0.0.

SDL_GetSurfaceColorMod
SDL_SetSurfaceAlphaMod

CategoryAPI


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