NAME¶

SDL_SetTextureAlphaMod - Set an additional alpha value multiplied into render copy operations.

SYNOPSIS¶

#include "SDL3/SDL.h"

int SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha);

DESCRIPTION¶

When this texture is rendered, during the copy operation the source alpha value is modulated by this alpha value according to the following formula: srcA=srcA*(alpha/255) Alpha modulation is not always supported by the renderer; it will return -1 if alpha modulation is not supported.

FUNCTION PARAMETERS¶

texture

the texture to update

alpha

the source alpha value multiplied into copy operations

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_GetTextureAlphaMod(3), SDL_SetTextureAlphaModFloat(3), SDL_SetTextureColorMod(3)