Makes pixels in @window outside @shape_region be transparent,
so that the window may be nonrectangular.
If @shape_region is %NULL, the shape will be unset, so the whole
window will be opaque again. @offset_x and @offset_y are ignored
if @shape_region is %NULL.
On the X11 platform, this uses an X server extension which is
widely available on most common platforms, but not available on
very old X servers, and occasionally the implementation will be
buggy. On servers without the shape extension, this function
will do nothing.
This function works on both toplevel and child windows.
Makes pixels in @window outside @shape_region be transparent, so that the window may be nonrectangular.
If @shape_region is %NULL, the shape will be unset, so the whole window will be opaque again. @offset_x and @offset_y are ignored if @shape_region is %NULL.
On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.
This function works on both toplevel and child windows.