This patch implements the following nodes for the realtime compositor: - Box mask node. - Channel matte node. - Chroma matte node. - Color matte node. - Color spill node. - Difference matte node. - Distance matte node. - Ellipse matte node. - Luminance matte node. Differential Revision: https://developer.blender.org/D15230 Reviewed By: Clement Foucault