On Tue, Jun 14, 2011 at 9:56 AM, Young Han Lee <joybro at company100.net> wrote: > The pixmap snapshoted from the webview widget has 24-depth, and this > eventually causes cairo making a png file has RGB color, not RGBA. Did you try forcing the toplevel window to have an RGBA colormap by using gtk_widget_set_colormap? --Martin