| Bug ID | 88642 |
|---|---|
| Summary | Trilinear sampling on cubemap wrongly sampled at the border of rasterized triangle on HAWAII |
| Product | Mesa |
| Version | 10.4 |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | vljn@ovi.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 112566 [details]
Test case
Hi,
on a R290X with a fresh fedora 21 install (Mesa 10.4.1) a fragment shader
sampling a cubemap texture with trilinear filtering is not correctly executed
on the edge of rasterized triangles.
I've included a patch against piglit that display the behaviour. On my system
the test display a small orange diagonal line on top of the color pattern.
(the test doesn't check result atm)
I think it's related to some quad pattern : in my app that has a depth buffer
the line follows the edge of the geometry.
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