Brainstorming/Layers

Perceptual Colour
Implemented in git as of 27 Jul 2012. MyPaint supports a subset of the compositing modes defined in the SVG Compositing Specification, and now the implemented the Color and Luminosity non-separable blend modes from the upcoming Compositing and Blending 1.0 specification.

These are is the same operation as defined in the PDF specs and implemented by Cairo's compositing operators.

The OpenRaster specification has been updated to permit other non-separable blend modes from the same draft: http://www.freedesktop.org/wiki/Specifications/OpenRaster/Draft/LayersStack?action=info

--Achadwick 15:06, 18 October 2012 (UTC)