This patch implements the following nodes for the realtime compositor:
- Map range node.
- Map value node.
- Math node.
- Normal node.
- Alpha convert node.
- Separate color node.
- Combine color node.
- Separate XYZ node.
- Combine XYZ node.
- Separate RGBA node.
- Combine RGBA node.
- Separate HSVA node.
- Combine HSVA node.
- Separate YCCA node.
- Combine YUVA node.
- Set alpha node.
- Switch node.
- Switch view node.
- RGB to BW node.
- Color ramp node.
Differential Revision: https://developer.blender.org/D15229
Reviewed By: Clement Foucault