https://bugs.freedesktop.org/show_bug.cgi?id=80183
Priority: medium
Bug ID: 80183
Assignee: mesa-dev@lists.freedesktop.org
Summary: [llvmpipe] triangles with vertices that map to raster
positions > viewport width/height are not displayed
Severity: normal
Classification: Unclassified
OS: All
Reporter: florianl...@gmail.com
Hardware: Other
Status: NEW
Version: 10.2
Component: Other
Product: Mesa
Created attachment 101296
--> https://bugs.freedesktop.org/attachment.cgi?id=101296&action=edit
Traces that reproduce the problem
When using llvmpipe/64bit, we experience missing triangles when one of the
vertices of the triangle has a raster position outside of the viewport
top/right.
It only happens when a GLSL shader is active, not when fixed function rendering
is used. It only happens with llvmpipe, using softpipe all is fine (also with
GLSL shader).
Attached you find a apitrace that works and a apitrace that shows the problem.
While MeVisLab.ok.trace (Frame 11) shows a textured polygon,
MeVisLab.wrong.trace (Frame 13) is rendered black, while it should show the
same textured polygon, clipped to the viewport width/height.
The traces contain some MeVisLab network rendering as well, these can be
ignored.
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