Re: minutes, Tokyo 2013 SVG F2F Day 1, 3 June 2013

Clarification regarding enable-background --- I'm against it not for
performance reasons but because it creates unnecessary complexity for
authors. Simple uses of filters with Background should not require special
CSS in ancestors to work. Especially when applying filters to HTML.

On Mon, Jun 3, 2013 at 8:32 PM, Cameron McCormack <cam@mcc.id.au> wrote:

>    krit: Does FF do transform transitions in hardware? WebKit
>    doesn't do it yet (all software for SVG), but we want to change
>    that.
>

>    heycam: Same.
>    ... Seems like this will suck.
>

Actually we do layerize some SVG transforms for GPU compositing, as of
quite recently. There are some bugs blocking the performance improvements
from being visible, but they're getting fixed.

I think SVG transforms should cause an isolated group.

   krit: We make them isolated groups, and I think FF does too.
>    ... Also masks and clips are stacking contexts.
>

Opacity has to create a stacking context, and therefore has to create an
isolated group.

If people want blending to break out of stacking contexts or other isolated
groups somehow --- let's see the use-cases for that and see if there's any
reasonable way to support them. Getting filter Background and
blending/compositing working inside isolated groups seems like enough work
for now!

Rob
-- 
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