Re: [CSS4 color][CSS4 transition] color pre-multiplied vs non pre-multiplied was (Re: [CSSWG] Minutes TPAC Tue 2012-10-30 AM I: Abstract Directions, Transforms, Transitions)

On Jan 31, 2013, at 11:18 PM, Simon Fraser <smfr@me.com> wrote:

> We rely on Core Graphics to render gradients on Mac, and that can't do pre-multiplied. That's the main reason why gradients don't match transitions.

If I understand correctly, this means that if an author wants a nice clean-looking 3-stop gradient that goes from yellow to transparent to blue, he will have to use two same-position transparent color stops, so that it is actually yellow to transparent-yellow, and then transparent-blue to blue. Couldn't WebKit just perform this extra conversion step for us before passing it on to Core Graphics?

Received on Friday, 1 February 2013 14:51:22 UTC