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Set the opacity for a window.


int SDL_SetWindowOpacity(SDL_Window * window, float opacity);

Function Parameters


the window which will be made transparent or opaque


the opacity value (0.0f - transparent, 1.0f - opaque)

Return Value

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


The parameter opacity will be clamped internally between 0.0f (transparent) and 1.0f (opaque).

This function also returns -1 if setting the opacity isn't supported.


This function is available since SDL 2.0.5.


CategoryAPI, CategoryVideo, CategoryDraft

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