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= SDL_GetWindowOpacity =
Use this function to get the opacity of a window.


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== Syntax ==
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int SDL_GetWindowOpacity(SDL_Window* window,
                         float*      opacity)
}}}


== Function Parameters ==
||'''window'''||the window to get the current opacity value from||
||'''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.


== Code Examples ==
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== 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.

This function is only supported on DirectFB, X11, Cocoa (Apple Mac OS X) and Microsoft Windows.


== Version ==
This function is available since SDL 2.0.5.


== Related Functions ==
 .[[SDL_SetWindowOpacity]]
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[[CategoryAPI]], [[CategoryVideo]]
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