* [Bug 53884] New: gl_FragCoord gets corrupted in some camera angles
@ 2012-08-21 14:42 bugzilla-daemon
2012-08-21 14:43 ` [Bug 53884] " bugzilla-daemon
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bugzilla-daemon @ 2012-08-21 14:42 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=53884
Bug #: 53884
Summary: gl_FragCoord gets corrupted in some camera angles
Classification: Unclassified
Product: Mesa
Version: 8.0
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/r600
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: curaga@operamail.com
Created attachment 65891
--> https://bugs.freedesktop.org/attachment.cgi?id=65891
Screenshot of the issue, bad camera angle
In certain camera angles, gl_FragCoord.xy seem to have bogus/corrupted values.
I tried to make a simple example but couldn't, so uploading an apitrace of the
bigger app and screenshots. The apitrace is 60mb XZ-compressed, that's why the
need to use a third-party service - upload limits here.
This shader:
void main() {
gl_FragColor = vec4(gl_FragCoord.xy / vec2(640, 480), 0.0, 0.0);
}
should always create values from 0 to 1 in a window of that size. In the
apitrace the only difference is that the size is passed in an uniform.
This bug happens on both r600g and llvmpipe. I didn't have the patience to wait
for softpipe to render it. I don't have anything else on this machine to
compare to (swrast, blobs).
Mesa 8.0.3
Linux 3.2.23
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* [Bug 53884] gl_FragCoord gets corrupted in some camera angles
2012-08-21 14:42 [Bug 53884] New: gl_FragCoord gets corrupted in some camera angles bugzilla-daemon
@ 2012-08-21 14:43 ` bugzilla-daemon
2012-08-21 14:46 ` bugzilla-daemon
2012-08-21 18:59 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2012-08-21 14:43 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=53884
--- Comment #1 from Lauri Kasanen <curaga@operamail.com> 2012-08-21 14:43:19 UTC ---
Created attachment 65892
--> https://bugs.freedesktop.org/attachment.cgi?id=65892
Same scene, good camera angle
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* [Bug 53884] gl_FragCoord gets corrupted in some camera angles
2012-08-21 14:42 [Bug 53884] New: gl_FragCoord gets corrupted in some camera angles bugzilla-daemon
2012-08-21 14:43 ` [Bug 53884] " bugzilla-daemon
@ 2012-08-21 14:46 ` bugzilla-daemon
2012-08-21 18:59 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2012-08-21 14:46 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=53884
--- Comment #2 from Lauri Kasanen <curaga@operamail.com> 2012-08-21 14:46:53 UTC ---
Apitrace (60mb):
http://www.ziddu.com/download/20164691/fragcoord.trace.zip.html
Renamed as a zip to let it be uploaded.
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug 53884] gl_FragCoord gets corrupted in some camera angles
2012-08-21 14:42 [Bug 53884] New: gl_FragCoord gets corrupted in some camera angles bugzilla-daemon
2012-08-21 14:43 ` [Bug 53884] " bugzilla-daemon
2012-08-21 14:46 ` bugzilla-daemon
@ 2012-08-21 18:59 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2012-08-21 18:59 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=53884
Ian Romanick <idr@freedesktop.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
Component|Drivers/Gallium/r600 |Mesa core
--- Comment #3 from Ian Romanick <idr@freedesktop.org> 2012-08-21 18:59:15 UTC ---
I'm also able to reproduce this on Intel hardware with i965_dri.so. Since this
doesn't seem specific to r600 hardware or even to Gallium-based drivers, I'm
switching the component to 'Mesa core'.
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