[Webkit-unassigned] [Bug 140667] [WinCairo] Accelerated compositing should be disabled when graphics card does not support it.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Feb 11 09:59:38 PST 2015


Alex Christensen <achristensen at apple.com> changed:

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--- Comment #4 from Alex Christensen <achristensen at apple.com> ---
Comment on attachment 244974
  --> https://bugs.webkit.org/attachment.cgi?id=244974

View in context: https://bugs.webkit.org/attachment.cgi?id=244974&action=review

I could see this making things a little harder to debug.  If we run into a problem in the future, we would also have to ask ourselves if it is a problem with the accelerated path or not.  Doesn't DirectX have a non-graphics-card implementation that ideally behaves the same, but slower?  Couldn't we use this through ANGLE instead of OpenGL?  If that's infeasible, then this is definitely the way to go.

> Source/WebKit/win/WebCoreSupport/AcceleratedCompositingContext.cpp:248
> +bool AcceleratedCompositingContext::acceleratedCompositingAvailable()

This and the declaration should probably also be inside #if USE(TEXTURE_MAPPER_GL)

> Source/WebKit/win/WebCoreSupport/AcceleratedCompositingContext.cpp:263
> +        DestroyWindow(testWindow);

::DestroyWindow here and elsewhere

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