Re: New drawing/scrolling model

[Alexander Larsson <alexl redhat com>]

On fre, 2013-05-03 at 21:59 -0400, Matthias Clasen wrote:
> On Thu, May 2, 2013 at 2:40 PM, Alexander Larsson <alexl redhat com> wrote:
>
>
> > I've tried a bunch of apps and most things seem to work. Currently I
> > know of two problems:
>
> I've gone through gtk3-demo and our other test programs with this
> branch, and could only find one noticable breakage: The GtkStack
> crossfade transitions seem to be somewhat messed up with the branch.
> If you look at the example in the second page of gtk3-widget-factory,
> you'll notice how the colors of the cube change before it starts to
> fade out. This is not happening with master.

I fixed this. It was a bug in GtkStack where it didn't check
gtk_cairo_should_draw_window() so it ADDed the crossfaded surface twice
creating the weird colors. This wasn't a problem before as then the
alpha/opacity-group case only called draw() once for each widget (rather
than once per gdkwindow), but that is really not quite correct.