pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
thumb_width, thumb_height);
gdk_pixbuf_fill (pixbuf, 0xffffffff);
pixels = gdk_pixbuf_get_pixels (pixbuf);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
thumb_width, thumb_height);
gdk_pixbuf_fill (pixbuf, 0xffffffff);
pixels = gdk_pixbuf_get_pixels (pixbuf);