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Starred by 1 user
Status: Available
Owner: ----
Cc:
emir...@chromium.org
erikc...@chromium.org
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Pri: 3
Type: Bug



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Fix test WebRtcCaptureFromElementBrowserTest.VerifyCanvasWebGLCaptureColor on mac

Project Member Reported by junov@chromium.org, Mar 28 2017 
Test is suppressed on Mac.

Introduced by this CL: https://codereview.chromium.org/2768683002/

Test does not fail in local builds, and the manual repro case for the associated bug does not fail on mac after the fix. It's probably a bug with the test.

Comment 1 by emir...@chromium.org, Mar 28 2017

Cc: erikc...@chromium.org
I can't repro it on my Macbook Air 10.12.2 either. However, note that the failed bot runs 10.9.5. 
https://build.chromium.org/p/tryserver.chromium.mac/buildslaves/vm697-m4

erikchen@, the test fails basically because of color difference on the rendered video. Do you know of any condition in WebGL or skia running on these bots that can cause this?

https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Ftryserver.chromium.mac%2Fmac_chromium_rel_ng%2F413538%2F%2B%2Frecipes%2Fsteps%2Fcontent_browsertests__with_patch_%2F0%2Flogs%2FWebRtcCaptureFromElementBrowserTest.VerifyCanvasCaptureColor%2F0

Comment 2 by erikc...@chromium.org, Mar 28 2017 

I can't think of anything that is macOS version dependent, but we know that macOS drivers do have different behavior, both across macOS versions and across GPUs. I would recommend trying to repro on a 10.9 device and/or trying to repro on a device that has the same GPU.

Comment 3 by junov@chromium.org, Mar 28 2017 

I suspect it is a timing issue because it looks like the test is sometimes grabbing the frame for the previous test iteration.  Perhaps there is some sort of delay in the video propagation?

Comment 4 by schenney@chromium.org, Apr 11 2017

Status: Assigned (was: Untriaged)

Comment 5 by junov@chromium.org, Jul 25

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Status: Available (was: Assigned)
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