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Issue 651470 link

Starred by 1 user
Status: WontFix
Owner: ----
Closed: Oct 2016
Cc:
█ kbr@chromium.org
boliu@chromium.org
dknandiraju@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 2
Type: Bug-Regression



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WebGL makes the screen flickering on v53 Chrome for Android

Reported by joe.kr...@gmail.com, Sep 29 2016 
Steps to reproduce the problem:
1. Create a HTML5 canvas
2. Specify "webgl" and alpha:false option on getContext method 
3. Put any operation on the canvas when rendering the canvas

Check the following example on v53 Chrome for Android:
https://jsfiddle.net/69wxvmLd/7/

What is the expected behavior?
Black screen.

What went wrong?
Screen is flickering on v53 Chrome for Android.

Did this work before? Yes v52 Chrome for Android

Chrome version: 53.0.2785.97  Channel: stable
OS Version: 4.4.2
Flash Version: Shockwave Flash 23.0 r0

The issue is occurring only with alpha:false option.

Comment 1 by rsgav...@chromium.org, Oct 3 2016

Cc: dknandiraju@chromium.org
Labels: triage-te

Comment 2 by dknandiraju@chromium.org, Oct 7 2016

Status: WontFix (was: Unconfirmed)
This issue is not reproducible on latest V53-53.0.2785.124, no flickering is observed Verified on Samsung galaxy S4 mini(GT-I9190)/ KOT49H(4.4.2). Comment if there are any specific steps.

Comment 3 by joe.kr...@gmail.com, Oct 11 2016 

Thanks for your answer.

The bug is still occuring with Chrome mobile v53.2785.0.124
There are no specific steps: we just open the jsfiddle link and see that the black canvas is blinking.

We tested on 2 devices:

- Samsung galaxy core II (SM-G355HN), Android 4.4.2, GPU Mali-400MP
- Wiko Rainbow v8, Android 4.4.2, GPU Mali-400MP2

Comment 4 by candr...@chromium.org, Oct 11 2016

Components: Blink>WebGL
Thanks for the report!

I was able to repro on a Galaxy Core 2 (SM-G355M) with Chrome 53.0.2785.124 with the jsfiddle link that you provided.

It appears to be fixed though in Chrome Beta 54.0.2840.50.  The black canvas is no longer blinking.

Comment 5 by kbr@chromium.org, Oct 19 2016

Cc: boliu@chromium.org kbr@chromium.org
We should figure out whether any of the WebGL conformance tests would have caught this, or whether we need to write a pixel test for it, and run it on certain devices. This regression was pretty unfortunate.

Comment 6 by jane.lor...@mwiinfo.com, Mar 21 2017 

How is this? We are currently developing a game using phaser and it has a flickering bug.

We encountered this in:
Chrome 55.0.2883.91
Android 4.4.2
Huawei Honor 4C
►

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