[Webkit-unassigned] [Bug 144782] New: WebKit nightly does not render video HTML5 media elements with CSS transform by Javascript.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144782

            Bug ID: 144782
           Summary: WebKit nightly does not render video HTML5 media
                    elements with CSS transform by Javascript.
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: daegyu.lee at navercorp.com

I checked same behavior on EFL port.
I checked same behavior on GTK port with disable GSTREAMER_GL and ENABLE_THREADED_COMPOSITOR.

Video tag does not get RenderLayerBacking when MediaPlayerPrivate::supportsAcceleratedRendering() returns false which means no using accelerated video decoding.
With changing CSS Style by javascript, video tag gets RenderLayerBacking.
But there  is no way to set GraphicsLayer::setDrawsContent(true) for updating video content.

Reproduce: http://codepen.io/anon/pen/qdbBep

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