| Summary: | Teapot visual artifact | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | vincent <vljn> |
| Component: | Other | Assignee: | mesa-dev |
| Status: | RESOLVED NOTABUG | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | 7.11 | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
Code that show the bug.
Here is the image showing display artifact |
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Created attachment 53021 [details]
Here is the image showing display artifact
I've narrowed the bug : the faulty command is glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); Adding an additionnal GLUT_DEPTH param make the code works. AMD and Nvidia proprietary drivers seem to force GLUT_DEPTH in display mode when depth_test are enabled. I have no idea if there is a spec that tells if such a behavior is legit or not, I'm marking this as NEEDINFO. (In reply to comment #2) > I've narrowed the bug : > the faulty command is > > glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); > > Adding an additionnal GLUT_DEPTH param make the code works. > > AMD and Nvidia proprietary drivers seem to force GLUT_DEPTH in display mode > when depth_test are enabled. I have no idea if there is a spec that tells if > such a behavior is legit or not, I'm marking this as NEEDINFO. I think what's really happening is you're getting a GLX visual with a depth buffer just by luck with AMD/NVIDIA. glxinfo will show you which visuals have a depth buffer. With the NVIDIA driver, most visuals have a depth buffer. Probably the same thing with AMD's driver. If your application uses depth testing you _must_ call glutInitDisplayMode() with GLUT_DEPTH. Similarly with stencil and accum buffers. I think we can close this as not-a-bug. |
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Created attachment 53020 [details] Code that show the bug. Hi, when I execute the code in attachment (buildable with scons, freeglut, and glu), I get the image (in attachment as well), using gallium nvc0 or gallium swrast. Teapot should not be transparent...