Bug 11167

Summary: Problem with RGBA images while using XAA
Product: xorg Reporter: Hasso Tepper <hasso>
Component: Server/Acceleration/XAAAssignee: Xorg Project Team <xorg-team>
Status: RESOLVED WONTFIX QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: All   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Hasso Tepper 2007-06-06 00:14:58 UTC 
Rendering RGBA images is awfully slow with Konqueror web browser (and with other Qt applications) with XAA since upgrade from 6.8 and haven't improved since then. I use Linux and DragonFly BSD with ati, mga and nv drivers and all these have the problem.

Good testcase is viewing screenshots in http://kde-apps.org/content/show.php?content=10187 . With first two screenshots Konqueror really lags - it's slow to open, scroll and move window. But there isn't any slowdown with third screenshot. First two screenshots are 8-bit/color RGBA images, third one is 8-bit/color RGB image. Although Firefox handles these images significantly better, there is noticeable slowdown in it as well on slower machines.

There is no problem with EXA (tested with ati and xorg 7.1),  but EXA is currently broken in xorg 7.2 and isn't available at all for nv. I'm almost sure that it's a regression - the problem appeared with xorg 6.9 - I still have some machines with XFree86 and there is no problem with them.
Comment 1 Jeremy Huddleston Sequoia 2011-10-15 18:41:05 UTC 
This is old.  XAA is old and crufty and won't be seeing performance 
improvements.  If you can provide a patch to fix this, however, it will be 
considered.

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