Bug 89758

Summary:	pow WebGL Conformance test with mesa drivers
Product:	Mesa	Reporter:	Luke <lukebenes>
Component:	Drivers/DRI/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:	Nouveau Project <nouveau>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Luke 2015-03-25 06:20:50 UTC

On a GTX 650, the following 6 pow tests fail with the nouveau drivers but pass with the nvidia proprietary driver:

https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/conformance/ogles/GL/pow/pow_009_to_016.html

test: pow_float_frag_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,0,0,255] expected [16,0,0,255]

test: pow_vec2_frag_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,0,255] expected [16,255,0,255]

test: pow_vec3_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,90,255] expected [16,255,255,255]

https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/conformance/ogles/GL/pow/pow_017_to_024.html

test: pow_float_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,0,0,255] expected [16,0,0,255]

test: pow_vec2_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,0,255] expected [16,255,0,255]

test: pow_vec3_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,90,255] expected [16,255,255,255]

Comment 1 Ilia Mirkin 2015-03-25 14:56:37 UTC

Confirmed on a GF108. Need to piglit this so that we can look at what's going on without running a web browser...

Comment 2 Ilia Mirkin 2015-03-25 22:01:53 UTC

Thanks for the report. As I suspected, nothing actually to do with pow, just that the test, as written, happens to tickle a nouveau optimization bug. Should be fixed by:

http://patchwork.freedesktop.org/patch/45657/

Still need to run it through piglit.

Comment 3 Ilia Mirkin 2015-03-27 23:06:38 UTC

Fix pushed in 49b86007aa. Thanks for reporting!

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