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Issue 724864 link

Starred by 4 users
Status: Duplicate
Merged: issue 721727
Owner: ----
Closed: May 2017
Cc:
█ hdodda@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug



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Drawing on multiple HTML5 canvases result in some artifacts.

Reported by emiljasi...@gmail.com, May 21 2017 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce the problem:
Open canvasArtifactsBug.html

What is the expected behavior?
Look expected.png

What went wrong?
Some artifacts are rendered.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 58.0.3029.110  Channel: stable
OS Version: 10.0
Flash Version: 

The example is simple:
There are two layers (div elements contains canvases): "normalLayer" and "mouseOverLayer".

I reproduced the bug on four computers (Dell Precision 7510), but only when Intel Graphics 530 is active. The bug doesn't exist when I switch to Nvidia card. The only browser for which problem exists is Google Chrome.
canvasArtifactsBug.html
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layer1.png
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layer2.png
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actual.png
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expected.png
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canvasArtifactsBug.html
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Comment 1 by gengc...@126.com, May 22 2017 

My phenomenon
QQ截图20170522094437.png
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Comment 2 by gengc...@126.com, May 22 2017

{DD9DA4A0-92AF-42BC-B9C0-91216FEB55DD}.png
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Comment 3 by nyerramilli@chromium.org, May 22 2017

Labels: Needs-Triage-M58 Needs-Bisect

Comment 4 by hdodda@chromium.org, May 22 2017

Cc: hdodda@chromium.org
Labels: TE-NeedsTriageFromMTV
Tested the issue on Windows 10 & 7 using chrome M58 #58.0.3029.110 and issue is not reproduced .

Issue is tested on two different graphics cards Intel 4600 , Nvdia quadro K620 and was  unable to reproduce the issue .

Attached screencast for reference.

@MTV Team -- Could someone please check this issue as inhouse-team doesn't have Intel graphics 530 .

Thanks!
724864.mp4
2.1 MB View Download

Comment 5 by gengc...@126.com, May 22 2017

Comment 6 by gengc...@126.com, May 22 2017

EV~2017.05.22~18.1239.mp4
1.7 MB View Download

Comment 7 by jmukthavaram@chromium.org, May 22 2017

Mergedinto: 721727
Status: Duplicate (was: Unconfirmed)
As per Comment#15 by gengcjun@126.com, merging this issue with 721727.

Please feel free to undup if it is not similar.
Thanks..!!
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