shape_combine_region

Description:

public void shape_combine_region (Region? shape_region, int offset_x, int offset_y)

Makes pixels in this 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.

Parameters:

this	a Window
shape_region	region of window to be non-transparent
offset_x	X position of `shape_region` in this coordinates
offset_y	Y position of `shape_region` in this coordinates