[Webkit-unassigned] [Bug 60827] [GTK] Implement GraphicsContextCairo::imageInterpolationQuality().

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=60827


Andreas Kling <kling at webkit.org> changed:

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  Attachment #94583|review?, commit-queue?      |review+, commit-queue+
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--- Comment #8 from Andreas Kling <kling at webkit.org>  2011-05-24 06:02:40 PST ---
(From update of attachment 94583)
Nice, r=me.

A little about this setting, for anyone who is interested:

The most common use case for GC's imageInterpolationQuality is indeed the ImageQualityController which is a mechanism that ensures that we don't waste time painting an image with high-quality scaling when it's likely to be repainted very soon again.

For example, when the page is being scrolled, an image may be repainted over and over (with a primitive drawing model) and WebCore then tells the GC to draw it with low quality scaling until it sits in the same place for 0.5s (cLowQualityTimeThreshold in RenderBoxModelObject.cpp.) It's also used when animating images via JavaScript, e.g by dynamically altering the width/height attributes.

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