[cairo-bugs] [Bug 102661] Treat color glyph alpha as mask instead of source alpha

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102661

--- Comment #3 from Behdad Esfahbod <freedesktop at behdad.org> ---
(In reply to Jan Alexander Steffens (heftig) from comment #2)
> I think using alpha as the mask but leaving it in the source would do weird
> things to the destination alpha, as it becomes src * src + dst * (1 - src),
> i.e. you have a quadratic curve.

Yeah I agree we are double-multiplying...

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