(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

Draft

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SDL_GetWindowOpacity

Get the opacity of a window.

Header File

Defined in SDL_video.h, but apps should use #include <SDL3/SDL.h>

Syntax

int SDL_GetWindowOpacity(SDL_Window *window, float *out_opacity);

Function Parameters

window	the window to get the current opacity value from
out_opacity	the float filled in (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.

Remarks

If transparency isn't supported on this platform, opacity will be reported as 1.0f without error.

The parameter opacity is ignored if it is NULL.

This function also returns -1 if an invalid window was provided.

Version

This function is available since SDL 3.0.0.

See Also

• SDL_SetWindowOpacity

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CategoryAPI, CategoryAPIFunction, CategoryVideo, CategoryDraft

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