https://bugs.freedesktop.org/show_bug.cgi?id=81020
Priority: medium
Bug ID: 81020
Assignee: dri-devel at lists.freedesktop.org
Summary: [radeonsi][regresssion] Wireframe of background
rendered through objects in Half-Life 2: Episode 2
with MSAA enabled
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: daniel at constexpr.org
Hardware: Other
Status: NEW
Version: git
Component: Drivers/Gallium/radeonsi
Product: Mesa
Created attachment 102395
--> https://bugs.freedesktop.org/attachment.cgi?id=102395&action=edit
Wireframe rendered above foreground geometry (8xMSAA)
Black pixels along the wireframe of background geometry is rendered in front of
foreground geometry (even UI). The wireframe isn't visible all the time but
instead flickers as if there is some kind of race condition.
This is reproducible with all MSAA levels that can be set in the game (2x, 4x,
6x and 8x) - however with 2x and 4xMSAA, the wireframe is white instead of
black. Wit MSAA disabled everything is rendered correctly.
Happens as of commit f6db414f3ca2d692f262e3f5a38d4fcedbdf4f4f, does not happen
with mesa 10.2.2.
Bisecting blames commit 501fee2511a0a84303319a5e3deacf4959da5b08
Author: Marek Ol??k <marek.olsak at amd.com>
Date: Tue May 6 13:48:11 2014 +0200
radeonsi: implement set_min_samples
This is how per-sample shading is enabled.
GPU: Radeon HD 7950 (OpenGL renderer string: Gallium 0.4 on AMD TAHITI)
LLVM compiled from svn today (r202464)
GCC: 4.8.3
Distro: Gentoo
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