[Webkit-unassigned] [Bug 52200] Small filter primitive renderer improvements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52200





--- Comment #19 from Zoltan Herczeg <zherczeg at webkit.org>  2011-01-19 05:46:50 PST ---
> Yes. And the last point confused me, but now I understand your concept. There is still a problem I guess. What if an attribute causes the smallest effect rect to be bigger? E.g. The stdDeviation of feGaussianBlur increases. Doesn't it mean, that the results of determineFilterPrimitiveSubregion() are wrong? Doesn't this cause an invalidation, because our code in RenderSVGResourceFilter::applyResource() depends on these results? Something I haven't thought about yet :-(

I think we can leave this later. First, I would focus on attributes which does not change layout, only repainting is enough. Although repainting is still difficult, since one Filter(Primitive)Renderer can be referenced by multiple SVG elements, and renderer->repaint() only support one rectangle. Do you have any idea to invalidate multiple rects?

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