From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 66642] New: [nva5] Wrong provoking vertex is selected for flat attribute interpolation (clipping?) Date: Sat, 06 Jul 2013 11:53:08 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1389438628==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nouveau-bounces+gcfxn-nouveau=m.gmane.org-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Errors-To: nouveau-bounces+gcfxn-nouveau=m.gmane.org-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============1389438628== Content-Type: multipart/alternative; boundary="1373111588.FF0ccA0.29795"; charset="us-ascii" --1373111588.FF0ccA0.29795 Date: Sat, 6 Jul 2013 11:53:08 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=66642 Priority: medium Bug ID: 66642 Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Summary: [nva5] Wrong provoking vertex is selected for flat attribute interpolation (clipping?) Severity: normal Classification: Unclassified OS: Linux (All) Reporter: alzeih-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Hardware: x86-64 (AMD64) Status: NEW Version: git Component: Drivers/DRI/nouveau Product: Mesa The following piglit test: interpolation-flat-gl_BackColor-smooth-none.shader_test appears to select the wrong provoking vertex depending on the exact value of v[0].y. For v[0].y > -1.0, the triangle ends up red. For v[0].y = -1.0, the triangle ends up green. For v[0].y < -1.0, the triangle ends up (correctly) blue. Hardware: nva5 (GT330M) in MacBookPro6,2 Mesa version: 1415a1884c Kernel: 3.9.8-1-ARCH Suspect the clipper doesn't respect the index of the provoking vertex in the triangle? -- You are receiving this mail because: You are the assignee for the bug. --1373111588.FF0ccA0.29795 Date: Sat, 6 Jul 2013 11:53:08 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"
Priority medium
Bug ID 66642
Assignee nouveau@lists.freedesktop.org
Summary [nva5] Wrong provoking vertex is selected for flat attribute interpolation (clipping?)
Severity normal
Classification Unclassified
OS Linux (All)
Reporter alzeih@gmail.com
Hardware x86-64 (AMD64)
Status NEW
Version git
Component Drivers/DRI/nouveau
Product Mesa 

The following piglit test:

  interpolation-flat-gl_BackColor-smooth-none.shader_test

appears to select the wrong provoking vertex depending on the exact value of
v[0].y.

For v[0].y > -1.0, the triangle ends up red.
For v[0].y = -1.0, the triangle ends up green.
For v[0].y < -1.0, the triangle ends up (correctly) blue.

Hardware: nva5 (GT330M) in MacBookPro6,2
Mesa version: 1415a1884c
Kernel: 3.9.8-1-ARCH

Suspect the clipper doesn't respect the index of the provoking vertex in the
triangle?

You are receiving this mail because:
  • You are the assignee for the bug.
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