Re: [webkit-dev] Anyone using NEON code on ARM builds?

[Jonathan Kliegman]

On Wed, Mar 14, 2012 at 2:14 PM, Dean Jackson d...@apple.com wrote:

 Hi,

 There are three files with embedded NEON code to speed up filters:


 ./Source/WebCore/platform/graphics/filters/arm/FECompositeArithmeticNEON.{h,cpp}
 ./Source/WebCore/platform/graphics/filters/arm/FEGaussianBlurNEON.{h,cpp}
 ./Source/WebCore/platform/graphics/filters/arm/FELightingNEON.{h,cpp}

 Are any ARM ports using this? (would require SVG and FILTERS both enabled)
 If so, could you contact me? Off list is fine.

 I see the code came from Felician Marton via Zoltan reviewed by Dirk (eg.
 https://bugs.webkit.org/show_bug.cgi?id=65522) and it's been very
 slightly touched for some chromium build issues.


Chrome OS has ports that use NEON and has SVG and FILTERS both enabled so
this would still be used.







Thanks,

 Dean


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[webkit-dev] Webkit handling of SVG with rgba() color

[Jonathan Kliegman]

I was looking at Bug 16183 (https://bugs.webkit.org/show_bug.cgi?id=16183) -
SVG doesn't support rgba() colors.  I was planning on fixing this but after
reading the SVG spec at http://www.w3.org/TR/SVG11/ which states that SVG
supports CSS2 color specifications I'm unsure if this should be fixed or
not. rgba() was introduced with CSS3 so is technically not supported by SVG.


Looking at other implementations Chrome and webkit-head both render a rgba()
color as pure black.  Safari 4.0.5 I've seen render it as either black or
missing.  Firefox does render it properly.  Batiq fails to render and gives
an error: The attribute stroke represents an invalid CSS value (rgba(0,
255, 0, 0.5)).

Looking at this bug from an end user perspective it would be good to add
this feature in as its likely that people will build sites that aren't
strictly compliant and would want things to just work.  However I'm always
wary of making changes that go against a published standard as that path can
lead to ugliness, divergent standards and future headaches.

What I'm looking for from the community is feedback on what the right thing
to do here with respect to webkit is.  Is it worth the convenience to the
user to add support for rgba() to the SVG code?

-Jon
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