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Gecko:Layers: Difference between revisions
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→Display list processing
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*** SVG mask (easy) | *** SVG mask (easy) | ||
*** SVG foreignObject inside arbitrary SVG gunk ... hmm. Maybe if we support all the above, *and* render SVG using display lists (which we currently don't), that would be enough. | *** SVG foreignObject inside arbitrary SVG gunk ... hmm. Maybe if we support all the above, *and* render SVG using display lists (which we currently don't), that would be enough. | ||
(jrmuizel: webkit doesn't have this problem because they don't support this kind of rendering effects. -webkit-mask-image works fine likely because it's easy to accelerate, -webkit-box-reflect doesn't seem to work but would be pretty easy to accelerate as well) | |||
The hard remaining problem is to know how to reuse or update the implicit layers belonging to a container. The content rendered in those layers may have been invalidated. Updating the invalid rectangle in each "implicit" layer is not that hard. The hard part is knowing when to create and/or destroy implicit layers because content has changed z-index, or an explicit layer child has been inserted or removed. I think we can do this with special flags to tag invalidations caused by a frame with an explicit layer child being inserted or removed. | The hard remaining problem is to know how to reuse or update the implicit layers belonging to a container. The content rendered in those layers may have been invalidated. Updating the invalid rectangle in each "implicit" layer is not that hard. The hard part is knowing when to create and/or destroy implicit layers because content has changed z-index, or an explicit layer child has been inserted or removed. I think we can do this with special flags to tag invalidations caused by a frame with an explicit layer child being inserted or removed. | ||