W3C home > Mailing lists > Public > www-svg@w3.org > July 2012

Re: Compositing math in SVG

From: Calculemus <calculemus1988@gmail.com>
Date: Sat, 28 Jul 2012 23:44:59 +0200
Message-ID: <CAOn8Oo8=jY-0=Px3bdk=UD=BpJOw2y8iyg6r6xEZvZfW8ZL40A@mail.gmail.com>
To: Rik Cabanier <cabanier@gmail.com>
Cc: Dirk Schulze <dschulze@adobe.com>, "steve@fenestra.com" <steve@fenestra.com>, "www-svg@w3.org" <www-svg@w3.org>
Wooow, thanks Rik! :)

I have some questions:

1. Why don't people mention this when they write about blend
modes? :) I read even the Adobe PDF reference and it was also
talking about the compositing formula the way I did it.
Where can I read more about this?

2. I am confused about the second case. Does not alpha
always come from the images? It is kinda strange to think
of a blend mode with some alpha, while both images have
alpha 1.

It seems what I want always is the first case, since alpha
will always come from the images. Not sure when would
I need the second case though?

I was so excited when I saw this, I wrote this quickly, I am
going to the shop to get some coffee and chocolate and
I am getting back to try if this change will fix my problems :D
Received on Saturday, 28 July 2012 21:45:26 GMT

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