On Wed, Mar 12, 2008 at 12:43 AM, Li, Frank <[EMAIL PROTECTED]> wrote: > Rusty: > I found a work around about this. Moko use composite window to > draw alpha indicator bar. Moko call cairo_paint_with_alpha(cr, 1.0) to > draw original child window context. But at Hardy+ppa version, this > function doesn't work rightly. So we can't see children widget. > But when change to cairo_paint_with_alpha(cr, 0.99), everything > is okay except performance has been dropped. > > Scrollable GtkWidget(such as gtkiconview and gtktreeview) use > two gdkwindow(window and bin_window). Bin_window like large back window, > at which all contexts will paint. "window" like a viewport and is parent > window of bin_window. By moving bin_window position, scrolled is > implemented. > > When set "window" composite, cairo_pain_with_alpha(1.0) will no > get context of bin_window that is child of "window". So paint nothing. > > I have verified cairo_pain_with_alpha(1.0) can paint composited > window that has not children. But fail paint composited window that has > children.
Instead of making a work around that negatively effects performance, I would rather fix the root cause. Have you chatted with the X guys about this? Does the bug showup with newer cairo bits? --rusty -- Ubuntu-mobile mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-mobile
