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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Color interpolation for colors with alpha incorrect (gradients)"
href="https://bugs.webkit.org/show_bug.cgi?id=150940#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Color interpolation for colors with alpha incorrect (gradients)"
href="https://bugs.webkit.org/show_bug.cgi?id=150940">bug 150940</a>
from <span class="vcard"><a class="email" href="mailto:simon.fraser@apple.com" title="Simon Fraser (smfr) <simon.fraser@apple.com>"> <span class="fn">Simon Fraser (smfr)</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=150940#c7">comment #7</a>)
<span class="quote">> > "with the interpolation taking place in premultiplied RGBA space"
>
> > but that text is expected to change once Mac and iOS can support
> > interpolation in non-premultiplied.
>
> Mh, I'm a little confused now as I'm not quite familiar with this
> terminology. Is interpolation in premultiplied RGBA what we are seeing now
> or what would be the correct thing to do?</span >
That's what you're seeing now. Transparent red in premultiplied color just becomes transparent, so any time you interpolate from it you end up with grayish intermediate values.
<span class="quote">> Why would that text change once Core Graphics decides to ship a fix for this bug?</span >
Because all browsers would then be able to interpolate in non-premultiplied color, and the CSS working group would change the text (at least for the next level of the spec).</pre>
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