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/i965	Assignee:	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
Whiteboard:
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

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