XGetImage (display, window, 0, 0, windowWidth, windowHeight,
~0L, ZPixmap);
XGetImage (display, window, 0, 0, windowWidth, windowHeight,
~0L, ZPixmap);
sourceImage = XGetImage (display, window, 0, 0, windowWidth, windowHeight,
~0L, ZPixmap);
sourceImage = XGetImage (display, window, 0, 0, windowWidth, windowHeight,
~0L, ZPixmap);