Compositing and Blending

• From: Bob Holmes <rangsynth@gmail.com>
• Date: Sun, 5 Aug 2012 12:10:54 +0200
• To: public-fx@w3.org
• Message-ID: <CAMvo67bLrCj=dKaK2_9=HboBNWbgkdakX0trfQgLtz+EEMnwRg@mail.gmail.com>

THESE DOCUMENTS...

1) https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#backdropexamples
2) http://www.w3.org/TR/SVGCompositing/

States that ...

Blending is the aspect of compositing that calculates the mixing of
colors where the source element and backdrop overlap. Blending takes
the colors of the source element and mixes them with the backdrop in
areas where the source element and backdrop overlap. Conceptually, the
colors in the source element are blended in place with the backdrop.
After blending, the modified source element is composited with the
backdrop. In practice, this is usually all performed in one step.

I THINK WHAT IT MEANS TO SAY IS THAT "ALL THE BLENDING AND
COMPOSITING" IS ACTUALLY REDUCED TO WELL DEFINED FUNCTIONS AS
DESCRIBED IN THE SECOND DOCUMENT.

In other words the first document is making a distinction between the
blending and the compositing, but in theory the functions are defined
as singular functions already in the second? So why the distinction
between the two in the first document?

Is this correct?

Received on Sunday, 5 August 2012 21:22:57 UTC