Bug 94142

Summary: Blits from GL_TEXTURE_2D_MULTISAMPLE GL_INT or GL_UINT surfaces are not handled correctly
Product: Mesa Reporter: Ian Romanick <idr>
Component: Drivers/DRI/i965Assignee: Ian Romanick <idr>
Status: RESOLVED MOVED QA Contact: Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity: normal    
Priority: medium    
Version: git   
Hardware: Other   
OS: All   
i915 platform: i915 features:
Attachments: Assertion that also shows the problem.

Description Ian Romanick 2016-02-13 22:52:41 UTC
Created attachment 121740 [details]
Assertion that also shows the problem.

For reference, use 'git blame src/mesa/drivers/common/meta_blit.c 9e30d66b'.  Assume the blit is an MSAA-MSAA blit from a GL_TEXTURE_2D_MULTISAMPLE surface with base type GL_INT.

Line 294 sets dst_is_msaa true.

Line 313 sets shader_index to BLIT_MSAA_SHADER_2D_MULTISAMPLE_COPY.

Line 339 increments shader_index by 5, and it is now BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_RESOLVE.

Similar problems exist for GL_TEXTURE_2D_MULTISAMPLE_ARRAY blits.  You really only notice this problem is a blit of one kind is followed by a blit of a kind that conflicts.

We should have piglit tests for this.

I noticed this because, while I was making other changes, I added an assertion like the one in the attachment.  Surely dst_is_msaa must be false when doing a resolve blit.  Alas.
Comment 1 GitLab Migration User 2019-09-25 18:56:20 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1514.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.