On 10/17/2011 11:41 PM, Kai-Uwe Behrmann wrote:
I am not sure where to start and seek for input on a problem with KWin and
Compiz. They show very similiar wrong rendering of borders, shadows and
the logout screens.
In compiz is a RGBA buffer used to contruct window borders and shadows:
/* all pixmaps are ARGB32 */
format = XRenderFindStandardFormat (xdisplay, PictStandardARGB32);
A sreenshot suggests that the 8-bit buffers are blended as is into the
30-bit visuals. What is the correct way to blend in the final frame buffer
image with XRenderComposite()?
Is the problem that the destination picture is created with the wrong
format? To create a Picture around the root window, the WM probably
wants to use PICT_a2r10g10b10 when it's depth 30 instead.
Are you trying to fix the same bug that I reported a while back?
https://bugs.kde.org/show_bug.cgi?id=214011
As a side note, the window contents are almost fine with the exception of
FF and GTK2 drawing areas.
I believe Damien Leone (CCed) came up with a patch for GTK that should
fix the issue you're seeing? He attached it to a bug you filed back in July:
https://bugzilla.gnome.org/show_bug.cgi?id=625202
Have you tried applying that to see if it fixes the non-WM related
issues you're seeing?
Thanks,
- Pierre-Loup
kind regards
Kai-Uwe Behrmann
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