Re: [fxtf-drafts] [filter-effects] Require image re-sampling for feDisplacement

@AmeliaBR I expect that this was a problem of screen resolution rather than an actual issue. The spec suggests to apply filter effects in the proper display resolution rather than the user space. On Mac I do not see a quality difference between Firefox, Safari and Chrome... just a huge performance difference.

The `filterRes` attribute was meant to allow applying filter effects into a different, user specified coordinate space but was removed from the spec.

Maybe `image-rendering` could be use to imply a smoother, less accurate image processing resolution. The real issue here, and a reason why `filterRes` was removed, is that it is unclear how some filters like `feConvolveMatrix` with `kernelMatrix` could be scaled up and down. We could make it up to the implementation to temporarily up- and downscale the intermediate image results for `feConvolveMatrix`. Maybe this is done today in some situations by implementations already though.

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Received on Tuesday, 2 January 2018 19:32:52 UTC