- From: Alan Gresley <alan@css-class.com>
- Date: Fri, 19 Aug 2011 19:33:23 +1000
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- CC: Cameron McCormack <cam@mcc.id.au>, Brian Manthos <brianman@microsoft.com>, "www-style@w3.org" <www-style@w3.org>
On 19/08/2011 8:45 AM, Tab Atkins Jr. wrote:
> On Thu, Aug 18, 2011 at 3:36 PM, Cameron McCormack<cam@mcc.id.au> wrote:
>> It's true that SVG 1.1's<color> definition doesn't technically allow rgba()
>> colours, but it would be interesting to see what implementations do with it
>> currently to know whether this is compatible with Image Values' definitions.
>> Also whether this behaviour is the same as an SVG gradient where some stops
>> have non-zero stop-opacity property values.
>
> I can't immediately test other browsers, but Chrome simply ignores the
> transparency of the color, while Firefox does the transition in
> post-multiplied space (same as they currently do for
> linear-gradient()).
>
> ~TJ
Both Chrome and Safari 5.1 seem to interpolate rbga in pre-multiplied
space. Gecko, Opera 11.50, 1E9 and IE10 preview 2 interpolate the below
gradient in post-multiplied space.
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG
1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:svg="http://www.w3.org/2000/svg">
<head>
<style type="text/css">
svg {background: black; width: 100px; height: 100px;}
</style>
</head>
<body>
<svg:svg>
<svg:g>
<svg:linearGradient id="gradient" gradientUnits="userSpaceOnUse" x1="0"
y1="100" x2="100" y2="0">
<svg:stop offset="0" style="stop-color:rgba(255,255,0,1)"/>
<svg:stop offset="1" style="stop-color:rgba(255,0,255,0)"/>
</svg:linearGradient>
<svg:path fill="url(#gradient)" d="M0,0v100h100V0H0z" />
</svg:g>
</svg:svg>
</body>
</html>
--
Alan Gresley
http://css-3d.org/
http://css-class.com/
Received on Friday, 19 August 2011 09:33:31 UTC