[Webkit-unassigned] [Bug 211870] A portion of the WebGL canvas is not updated at all, after rotating the phone from the portrait mode to the landscape mode and then to the portrait mode again

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211870

--- Comment #2 from Kei Kim <kei at superluffa.com> ---
To workaround this issue, I needed to change the canvas size a couple of time when the canvas size is changed.

For the link,
https://newvr.s3.ap-northeast-2.amazonaws.com/vrshowroom/csa/csa0/lhdfull/index.html#sp2iexterior

this patch is applied. When the canvas's size is changed, that grey undrawn area is correctly updated again.

For another link,
http://kiavr2017.s3-website.ap-northeast-2.amazonaws.com/handson/cn/cn1/#bdcexterior

the patch is not applied.
You can test with the latter link. Just rotate the screen a couple of time from the portrait mode to the landscape mode and vice versa.

Thanks.

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