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Bug 597343 - Windows mis-aligned when using Mutter
Windows mis-aligned when using Mutter
Status: RESOLVED NOTGNOME
Product: mutter
Classification: Core
Component: general
git master
Other Linux
: Normal normal
: ---
Assigned To: mutter-maint
mutter-maint
Depends on:
Blocks:
 
 
Reported: 2009-10-04 19:05 UTC by Frederic Crozat
Modified: 2009-11-10 18:20 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
"fuzzy" antialiasing when using mutter (9.87 KB, image/png)
2009-10-04 19:05 UTC, Frederic Crozat 		Details
antialiasing ok when using metacity (8.90 KB, image/png)
2009-10-04 19:06 UTC, Frederic Crozat 		Details

Description Frederic Crozat 2009-10-04 19:05:57 UTC 
Created attachment 144728 [details]
"fuzzy" antialiasing when using mutter

When running under mutter, fonts for GTK+ applications looks a little bit
fuzzy. 

This issue is only visible with Mutter, I don't have  this problem when using
compiz or metacity (with compositing enabled).

It looks like antialising rendering is more "visible" with Mutter. I'm
attaching screenshots done with xmag.
Comment 1 Frederic Crozat 2009-10-04 19:06:35 UTC 
Created attachment 144729 [details]
antialiasing ok when using metacity
Comment 2 Owen Taylor 2009-10-04 19:16:56 UTC 
This is almost certainly a video driver bug. The reason you don't see it under Compiz is that Compiz turns off bilinear scaling for windows that are 1:1 and not scaled or transformed - we probably should do the same to get a bit of performance gain, but it's still a video driver bug.

(I fixed problems in the Radeon driver towards the beginning of the year.)
Comment 3 Frederic Crozat 2009-10-04 19:55:54 UTC 
I think you change the title of this bug incorrectly :)

Video card is : Card:ATI Radeon X1950 and earlier: ATI Technologies Inc|Radeon 9100 IGP [DISPLAY_VGA] (vendor:1002 device:5834 subv:1297 subd:f362)

using radeon driver.
Comment 4 Owen Taylor 2009-10-04 20:22:50 UTC 
new title looks fine to me - what's wrong with it? I wanted to make clear that it wasn't anything to do with text or antialiasing - you should see the same problem with lines.

Hmm, it looks my patch from:

 https://bugs.freedesktop.org/show_bug.cgi?id=20340

Is r300 only. r200 may need the same fix.
Comment 5 Frederic Crozat 2009-10-04 21:14:19 UTC 
well, for me, when you wrote "Windows", it means Windows in the window manager sense, not the OpenGL sense :)

Anyway, I've just rebuild Mesa with your r300 fix, adapted for r200 and it fixes the issue. I'll reopen fdo bug with r200 version of the patch.