Bug 32429

Summary:	[ILK] gles2: gl_PointCoord takes no effect for point sprites
Product:	Mesa	Reporter:	Hai <hai.lan>
Component:	Drivers/DRI/i965	Assignee:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Status:	RESOLVED WONTFIX	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	christophe.prigent, idr, imamdxl8805, kenneth, rhyskidd
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	gl_PointCoord takes no effect

Description Hai 2010-12-15 18:29:28 UTC

System Environment:
--------------------------
Libdrm:		(master)2.4.22-21-g537703fd4805e9cd352965fce642670986822d22
Mesa:		(master)c64447f47de168e82086bc2fb483817b82e59cab
Xserver:		(master)xorg-server-1.9.99.901-1-g780754050bc9cb1489f92a2a890ab5665e3e6358
Xf86_video_intel:		(master)2.13.901-25-g9b967807c2d240488a715509649663aac3583532
Cairo:		(master)d3accefd3b9a4db5f07fb1f7bb05fb4238bf36c1
Kernel:	(drm-intel-fixes) 1b39d6f37622f1da70aa2cfd38bfff9a52c13e05

Bug detailed description:
-------------------------
gl_PointCoord taskes no effect for point sprites. use gl_PointCoord as the gl_FragColor in fragment shader and draw a point, we detect a wrong color. 

Reproduce steps:
-------------------------
build the attachment and run it.

Comment 1 Hai 2010-12-15 18:31:15 UTC

Created attachment 41158 [details]
gl_PointCoord takes no effect

Comment 2 Eric Anholt 2010-12-16 13:48:20 UTC

Please include the chipset name (945GM, 965GM, GM45, Ironlake, Sandybridge) in bug reports.

Comment 3 Hai 2010-12-16 17:47:38 UTC

I tested it with Ironlake. In fact, this bug happens with pineview too.

Comment 4 Eric Anholt 2011-01-08 22:41:49 UTC


*** This bug has been marked as a duplicate of bug 28749 ***

Comment 5 Gordon Jin 2012-10-31 06:39:03 UTC

This still fails on Ironlake and PNV (while passing on SNB/IVB). Reopening since the other bug fixed on all these platforms.

Comment 6 Eric Anholt 2013-02-22 19:06:50 UTC

commit 92a204b493b447b1cbb06a3d2d350a1e6d2c6887
Author: Eric Anholt <eric@anholt.net>
Date:   Wed Feb 20 12:58:47 2013 -0800

    mesa: Fix setup of ctx->Point.PointSprite for GLES2.

Comment 7 lu hua 2013-06-03 08:40:52 UTC

It still exists.
output:
EGL_VERSION = 1.4 (DRI2)
Probe at (124,124)
  Expected: 0.375000 0.375000 0.000000
  Observed: 0.439216 0.560784 0.000000
Probe at (125,125)
  Expected: 0.500000 0.500000 0.000000
  Observed: 0.560784 0.439216 0.000000
PIGLIT: {'result': 'fail' }

Comment 8 Rhys Kidd 2015-07-25 03:19:33 UTC

Are you able to provide a more current testcase (and preferable instructions to compile).

The current one is referring to files no longer present within piglit.

Comment 9 Matt Turner 2016-11-03 02:35:31 UTC

Not gonna handle bugs for things not in a test suite or a real program.

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