Re: [css-images] Negative implications of linear gradient color space choice in CSS

> On Jan 23, 2016, at 9:37 pm, Rik Cabanier <cabanier@gmail.com> wrote:
> 
> On Sat, Jan 23, 2016 at 10:23 AM, Simon Fraser <smfr@me.com <mailto:smfr@me.com>> wrote:
> 
> This has been discussed several times in the past; we all agree that interpolating in non-premultiplied colors
> is better, but this is not supported by the graphics frameworks on some platforms (e.g. by CoreGraphics on Mac)
> so the spec is not able to mandate it.
> 
> You have it reversed. The graphics frameworks in the browsers all interpolate in non-premultiplied data. I had to add emulation code to all the browsers to make this happen.

Are you sure?

Gradients with a transparent endpoint in Safari look grayish near the end, because alpha premultiplication has caused loss most of the RGB information. We need to interpolate with non-premultpliied alpha to be able to interpolate the color components and the alpha independently.

Simon