Function SDL_GetSurfaceColorKey 

pub unsafe extern "C" fn SDL_GetSurfaceColorKey(
    surface: *mut SDL_Surface,
    key: *mut Uint32,
) -> bool

Get the color key (transparent pixel) for a surface.

The color key is a pixel of the format used by the surface, as generated by SDL_MapRGB().

If the surface doesn’t have color key enabled this function returns false.

Parameters

• surface: the SDL_Surface structure to query.
• key: a pointer filled in with the transparent pixel.

Return value

Returns true on success or false on failure; call SDL_GetError() for more information.

Thread safety

It is safe to call this function from any thread.

Availability

This function is available since SDL 3.2.0.

See also

• SDL_SetSurfaceColorKey
• SDL_SurfaceHasColorKey