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Re: Compositing math in SVG

From: Rik Cabanier <cabanier@gmail.com>
Date: Mon, 9 Jul 2012 16:51:12 -0700
Message-ID: <CAGN7qDDDRzfPf7VM_xVeXhiXkBVLgYy3KofoW0B1b28iUvh5gA@mail.gmail.com>
To: Calculemus <calculemus1988@gmail.com>
Cc: www-svg@w3.org
It looks like gimp is using a different formula for a blending operation
with the same name.
I don't know why they decided to make it different...

FWIW the blending modes that Microsoft is introducing for direct2d are the
same as Adobe's:
http://msdn.microsoft.com/en-us/library/windows/desktop/hh706313(v=vs.85).aspx


Rik

On Mon, Jul 9, 2012 at 4:41 PM, Calculemus <calculemus1988@gmail.com> wrote:

> Hmm actually you are right, that does match the Adobe reference. But I
> found many other sources that don't, for example the formula you use for
> overlay here:
>
> https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#blending
>
> is different than the one they use in GIMP:
>
> http://docs.gimp.org/en/gimp-concepts-layer-modes.html
>
> There are no conditionals there, just one formula. A comment from you on
> this would help a lot !
>
> Thanks
>
Received on Monday, 9 July 2012 23:51:40 GMT

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