[Webkit-unassigned] [Bug 40380] [Qt] When a layer is really opaque (ie has a background color that has 255 alpha) we should fill the layer with that color to tell Qt that the pixemap has no alpha.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=40380


Simon Fraser (smfr) <simon.fraser at apple.com> changed:

           What    |Removed                     |Added
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  Attachment #59933|review?                     |review-
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--- Comment #16 from Simon Fraser (smfr) <simon.fraser at apple.com>  2010-06-28 13:49:12 PST ---
(From update of attachment 59933)
> +    if (rendererHasBackground()) {
> +        const Color &bgColor = rendererBackgroundColor();
> +        m_graphicsLayer->setBackgroundColor(bgColor);
> +    } else
> +        m_graphicsLayer->clearBackgroundColor();

You can't do this. GraphicsLayers are not always the same size as their elements; in many cases, they are larger (e.g. try one with a box-shadow, or a abs. pos. child).

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