[webkit-gtk] Alpha channel problem in pixel-tests.

Young Han Lee joybro at company100.net
Mon Jun 13 06:01:27 PDT 2011

Hi Martin,

What 'compositing' did you mean? accelerated compositing?
AFAIK, the Gtk port doesn't support it yet.
I built the test binary without any additional enable-option, like this;
"./Tools/Scripts/build-webkit --gtk"

It sounds like that the Gtk port cannot run pixel-tests now, and needs some
patch for that..
Yep, I think it's time to dig into DumpRenderTree.

Young Han.

On Mon, Jun 13, 2011 at 7:52 AM, Martin Robinson <mrobinson at webkit.org>wrote:

> On Sun, Jun 12, 2011 at 7:06 AM, Young Han Lee <joybro at company100.net>
> wrote:
> > I'm trying to run pixel-tests on Gtk port, but almost all of the tests
> which
> > have expected-png-file are failing with the following error message.
> > "Error, test and reference image have different properties."
> > After some digging, I found that it is caused by the difference in the
> alpha
> > channel between the actualImage and the baselineImage. The baselineImage
> has
> > an alpha channel, but the actual image hasn't.
> > I tested this on my ubuntu desktop(10.10 x64) using Gtk port built with
> > default settings.
> Do you have compositing enabled? Perhaps we need to force the widget
> to have an alpha channel somehow. :/
> --Martin
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