Bug 4860 - Software rasterizer polygon offset problem
Summary: Software rasterizer polygon offset problem
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Mesa core (show other bugs)
Version: unspecified
Hardware: x86 (IA32) All
: high normal
Assignee: mesa-dev
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Reported: 2005-10-24 07:59 UTC by Brian Paul
Modified: 2010-03-27 04:29 UTC (History)
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Description Brian Paul 2005-10-24 07:59:42 UTC 
For deep Z buffers (24-bit or more) we may be adding a relatively small polygon
offset factor to a relatively large Z value, thus the offset value can get
"lost"   Should probably do the offset addition with integer Z values during
rasterization.

Relevant code is in swrast_setup/ss_tritemp.h

Reported to Brian by Dan Schikore
Comment 1 Corbin Simpson 2010-03-27 04:29:57 UTC 
I think all the software rasterizers pass the relevant piglit tests, don't they? If not, we can re-open and track from here.

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