- From: Alex Danilo <alex@abbra.com>
- Date: Fri, 15 Apr 2011 14:44:27 +1000
- To: Rik Cabanier <cabanier@gmail.com>
- Cc: public-fx@w3.org, www-svg <www-svg@w3.org>
Hi Rik, --Original Message--: ><snip/> >As an aside, we probably also want to extend the list of blending modes. >For instance, the current list is missing the following PDF blendmodes: hue | saturation | color | luminosity >Flash also defines some useful basic blendmodes (such as 'erase') that could be of interest. I totally agree that would be a good idea. At the time we did the original blending modes, I had to work out the equations from scratch since they were not publlished anywhere (i.e. pre-date the PDF spec.). So we started by looking at what Photoshop seemed to do and then did the math to take into account source and destination alpha. The result had some errors that have been fixed over time. For the best round-tripping scenarios with Quartz2D as well as AIM, I think adding these would be a great idea. Alex
Received on Friday, 15 April 2011 04:46:51 UTC