Re: Heads-up: Potentially breaking changes to the GDK drawing model pushed

[Jean Brefort <jean brefort normalesup org>]

This will break abiword as well.

Jean

Le samedi 21 juin 2014 à 08:02 -0400, Morten Welinder a écrit :
> Argh!
>
> Will the stream of ABI changes never end?
>
> Gnumeric uses this to provide a walking-ant cursor large selected areas -- areas
> too big for processing in the normal paint loop.
>
> Morten
>
>
>
>
>
> On Fri, Jun 20, 2014 at 9:00 PM, Jasper St. Pierre
> <jstpierre mecheye net> wrote:
> > To better support Wayland with fewer copies and less drawing artifacts, I've
> > pushed some potentially breaking changes to GDK, namely around
> > gdk_cairo_create and gdk_window_begin_paint_region.
> >
> > https://git.gnome.org/browse/gtk+/commit/?id=d48adf9cee7e340acd7f8b9a5f9716695352b848
> > https://git.gnome.org/browse/gtk+/commit/?id=be30e440c350f0f3e0f2572f7f3eab54ef96af0e
> >
> > With these changes, it is now illegal to call gdk_cairo_create outside of a
> > begin_paint / end_paint. This was always sketchy, and would never work on
> > Wayland anyway. If your code does this, we will print a warning and return a
> > dummy surface which won't ever be composited back into the main surface.
> >
> > Additionally, it is now forbidden to call gdk_window_begin_paint_region more
> > than once. Previously, the code had a "paint stack" which tracked paints,
> > but since GTK+ never used this codepath it was never actually tested and was
> > indeed broken on Wayland due to the way the Wayland backend was written.
> > Again, we will print a warning in this case and return.
> >
> > As part of these changes, gtk_widget_set_double_buffered was deprecated and
> > removed. Again, it will never work on Wayland, as that is natively
> > double-buffered, and it would simply break there.
> >
> > I tested with some local big applications like Ardour and the GNOME
> > applications, but don't have a GTK+3 build of Firefox, LibreOffice, Eclipse,
> > or any big GTK+ apps like Inkscape or The GIMP.
> >
> > Please double-check to make sure your apps still work fine. If you have a
> > problem with any of this or I broke your apps by accident, please reply and
> > I'll try to fix it.
> >
> > Thanks!
> >
> > --
> >   Jasper
> >
> > _______________________________________________
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> > gtk-devel-list gnome org
> > https://mail.gnome.org/mailman/listinfo/gtk-devel-list
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