http://bugs.freedesktop.org/show_bug.cgi?id=26623
Summary: Fix left side clipping in swrast
Product: Mesa
Version: git
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/X11
AssignedTo: mesa3d-dev@lists.sourceforge.net
ReportedBy: m.froehl...@science-computing.de
Created an attachment (id=33382)
--> (http://bugs.freedesktop.org/attachment.cgi?id=33382)
test program
The swrast module does incorrect clipping of scan lines when they need to be
clipped from the left side.
Attached is a small test program which shows one part of the problem, that is
the color attribute not being correctly clipped.
But other attributes are not correctly clipped as well.
For example the fixed function texture 0 coordinate which was the original
problem in a huger application.
Also attached is a patch originally against Mesa-7.5.2, but still valid for all
versions in between up to mesa git of today.
This patch fixes all those problems that I could reproduce in our application
as well as the attached example.
The patch just includes a 'monkey see - monkey do' change to correct all arrays
in and attributes a SWspan by the leftClip amount of pixels.
Please apply or fix in a different way.
Thanks!
Mathias
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