Fix issue with Blur / Multiblur apps
1. Make it possible to enable/disable DEPTH test when rendering to a Screen2. Using this, remove the 'Root' Node from StarWars.
A lot of different fixes.
A lot of issues still there:
1) if we only render part of the tree, tree isomorphism will sometimes not work correctly2) when we change Effects that are inside Trees mid-render, even if we detach() the affected parts of the Tree first, for the last frame the new Effects will be used...
New, cleaner way to create/destroy DistortedSurfaces.
Serious regression in StarWars (crashes!). Looks like the Node's internal FBO is being deleted and not re-created in time.
Change the the render() API!
THis introduces some regressions with the Effects3D app.
Preparation for change of the render API.
Simplify yesterday's refactoring.
Major: change of API.
Split DFramebuffer into Framebuffer and Screen; introduce the 'DistortedInputSurface' and 'DistortedOutputSurface' interfaces.
Also available in: Atom