[Webkit-unassigned] [Bug 278938] Canvas Context DrawImage() fails with tall videos

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=278938

--- Comment #1 from Mike D <mdiehr at xochi.com> ---
Regression testing reveals some complexity to the issue, as behavior differs depending on the GPU and OS in use, affecting mostly Intel MacBook Pros with both AMD, Intel, and NVIDIA GPUs.

Details:

Bug?   OS            Safari  GPU
------------------------------------------------
Yes*   Intel 10.14   14.1    Intel HD Graphics 4000
No     Intel 10.14   14.1    GeForce GT 650M

Yes    Intel 10.15   15.6    Intel HD Graphics 4000
Yes    Intel 10.15   15.6    GeForce GT 650M

Yes    Intel 12.4    15.5    Radeon Pro Vega 20   

Yes    Intel 14.6.1  17.6    Radeon Pro Vega 20   
Yes    Intel 14.6.1  P202    Radeon Pro Vega 20   
Yes    Intel 14.6.1  17.6    Intel UHD 630

No     M1    12.6   16.0    M1
No     M1    12.7.6 17.6    M1

No     M1    13.6.1 17.1    M1
No     M1    13.6.9 17.6    M1

No     M1    15.1   18.1    M1



Notes:

P202 = Safari Technical Preview build 202

Yes* = On this machine, the bug is reversed. when using the iGPU: video fails to play, but the canvas screenshots do work.  With the dGPU in use, it behaves normally.

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