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List:       dri-users
Subject:    Re: [Dri-users] Texturing bug on r200?
From:       Roland Scheidegger <rscheidegger_lists () hispeed ! ch>
Date:       2005-06-08 22:19:55
Message-ID: 42A76F0B.40507 () hispeed ! ch
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David Raulo wrote:
  > I tried the latest snapshot from http://dri.freedesktop.org/snapshots/
> (from 2005-04-17 and 2005-06-01).  The problem exposed in the test I
> posted is fixed indeed. Unfortunatly, I now get segfaults with some GL
> apps. This new bug seems to trigger everytime I call glCopyTexImage2D()
> or glCopyTexSubImage2D().  Here's a backtrace:
> 
> #0  0x00000000 in ?? ()
> #1  0xb78560ff in _swrast_use_read_buffer (ctx=0x806a050) at swrast/s_buffers.c:386
> #2  0xb7871507 in read_color_image (ctx=0x806a050, x=0, y=0, widthQ2, heightQ2) at \
> swrast/s_texstore.c:75 #3  0xb7871ab9 in _swrast_copy_texsubimage2d (ctx=0x806a050, \
> target553, level=0, xoffset=0, yoffset=0, x=0, y=0, widthQ2, heightQ2) at \
> swrast/s_texstore.c:353 #4  0xb7822835 in _mesa_CopyTexSubImage2D (target553, \
> level=0, xoffset=0, yoffset=0, x=0, y=0, widthQ2, heightQ2) at main/teximage.c:2636 \
> #5  0xb7e34a40 in mgSimpleShadowMask::Update (this=0x83c8e48) at \
> src/mg/mgSimpleShadowMask.cpp:138 #6  0xb7e2f8b8 in mgLightMask::UpdateAll () at \
> src/mg/mgLightMask.cpp:96 #7  0xb7e2dc0d in mgEngine::MainLoop () at \
> src/mg/mgEngine.cpp:291 #8  0x08048642 in main (argc=1, argv=0xbffff8c4) at \
> src/TestEngine/main.cpp:67 
> (sorry, I couldn't reproduce with a more widely used program, and didn't
> find the time to code a simple test case).
> Any idea of what went wrong?  Feel free to suggest any test that could help
> isolate the problem.
This looks to be another problem, maybe caused by the recent changes for
GL_EXT_framebuffer_object (just a guess). In any case, it might be
related to a bug just filed in bugzilla (though only
_swrast_use_read_buffer is the same in the backtrace, the rest is
different), https://bugs.freedesktop.org/show_bug.cgi?id495.

Roland


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