https://bugs.freedesktop.org/show_bug.cgi?id=88642
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 at lists.freedesktop.org
Reporter: vljn at ovi.com
QA Contact: dri-devel at lists.freedesktop.org
Created attachment 112566
--> https://bugs.freedesktop.org/attachment.cgi?id=112566&action=edit
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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