[Bug 58131] New: r300g: Corruption in Half Life 2 unless gl_ClipVertex is written - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 58131] New: r300g: Corruption in Half Life 2 unless gl_ClipVertex is written
Date: Tue, 11 Dec 2012 11:27:13 +0000	[thread overview]
Message-ID: <bug-58131-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=58131

          Priority: medium
            Bug ID: 58131
          Assignee: dri-devel@lists.freedesktop.org
           Summary: r300g: Corruption in Half Life 2 unless gl_ClipVertex
                    is written
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: stefandoesinger@gmx.at
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r300
           Product: Mesa

Created attachment 71330
  --> https://bugs.freedesktop.org/attachment.cgi?id=71330&action=edit
Screenshot of the static main menu

Half-Life 2 (running in Wine) has a random vertex corruption. This corruption
can be seen in the static main menu(start it with -console) and in-game. The
corruption goes away if I modify Wine to always write gl_ClipVertex even if
clipping is disabled.

This is interesting particularly because r300g does not support clipping with
vertex shaders. It says so on the command line, and in-game rendering and the
Wine tests confirm this.

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