This layout test fails. See master bug: https://bugs.webkit.org/show_bug.cgi?id=46506
Need to draw transparency in remaining canvas area before drawImage()
This issue is getting solved by adding CanvasRenderingContext2D::shouldDisplayTransparencyElsewhere() & CanvasRenderingContext2D::displayTransparencyElsewhere() to draw transparency for the remaining canvas area for CompositeSourceIn & CompositeSourceOut.
As this issue is same as https://bugs.webkit.org/show_bug.cgi?id=48297, for which patch is submitted to Bugzilla.
Once this patch is committed to main branch, this issue will be solved automatically.
Test is passing on all ports now.