Bug 99185

Summary:	dEQP-EGL.functional.image.modify.tex_rgb5_a1_tex_subimage_rgba8
Product:	Mesa	Reporter:	Chad Versace <chadversary>
Component:	Drivers/DRI/i965	Assignee:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Status:	RESOLVED FIXED	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	kenneth, lemody, mark.a.janes
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	98315

Description Chad Versace 2016-12-22 20:10:37 UTC

The test fails for me with the setup below:

test: dEQP-EGL.functional.image.modify.tex_rgb5_a1_tex_subimage_rgba8
mesa: master@7a4ea95
deqp: nougat-cts-dev@4acf725 and master@7363696
deqp-target: x11_egl
hw: Broadwell 0x1616

Comment 1 Chad Versace 2016-12-22 23:21:53 UTC

The test failed because in
glTexImage2D(format=GL_RGBA, type=GL_UNSIGNED_SHORT_5_5_5_1)
Mesa chose BRW_SURFACE_FORMAT_R8G8B8A8_UNORM as the storage format.
The two formats have incompatible precision in the alpha channel. One
provides binary alpha; the other provides gradient alpha.

Intel hardware supports BRW_SURFACE_FORMAT_B5G5R5A1_UNORM, so we need to teach       
glTexImage2D to choose that instead.

Comment 2 Chad Versace 2016-12-22 23:23:59 UTC

Fix submitted.
https://lists.freedesktop.org/archives/mesa-dev/2016-December/138921.html
https://patchwork.freedesktop.org/series/17153/

Comment 3 Chad Versace 2016-12-28 19:16:04 UTC

Patches pushed.

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