Bug 73915

Summary:	sample shading + centroid broken since f5cfb4a
Product:	Mesa	Reporter:	Markus Wick <wickmarkus>
Component:	Drivers/DRI/i965	Assignee:	Ian Romanick <idr>
Status:	RESOLVED FIXED	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	anuj.phogat
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	apitrace dump of this issue

Description Markus Wick 2014-01-22 07:11:33 UTC

Created attachment 92566 [details]
apitrace dump of this issue

The commit f5cfb4a is supposed to ignore the centroid flag, but it doesn't interpolate correctly when centroid is set.

Screenshots:
f5cfb4a: http://goo.gl/rvjy3V
10.0.1:  http://goo.gl/dICRn6
nvidia:  http://goo.gl/glaeYv

Without the centroid flag, rendering is now fine, thank you :)

Comment 1 Anuj Phogat 2014-01-23 00:56:51 UTC

Posted a patch on mesa-dev mailing list to fix this issue:
[PATCH] i965: Ignore 'centroid' interpolation qualifier in case of persample shading

Please verify the fix.

Comment 2 Markus Wick 2014-01-23 11:36:00 UTC

This diff fixes my issue and the game now look much nicer. Thank you

Comment 3 Markus Wick 2014-01-28 21:50:44 UTC

fixed by dc2f94bc786768329973403248820a2e5249f102

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