This patch implements the Ghost Glare node. It is implemented using
direct convolution as opposed to a recursive one, which produces
slightly different results---more accurate ones, however, since the
ghosts are attenuated where it matters, the difference is barely
visible and is acceptable as far as I can tell.
A possible performance improvement is to implement all passes in a
single shader dispatch, where an array of all scales and color
modulators is computed recursively on the host then used in the shader
to add all ghosts, avoiding usage of global memory and unnecessary
copies. This optimization will be implemented separately.
Differential Revision: https://developer.blender.org/D16641
Reviewed By: Clement Foucault
This patch implements the normalize node for the realtime compositor.
Differential Revision: https://developer.blender.org/D16279
Reviewed By: Clement Foucault
This patch implements the tone map node for the realtime compositor
based on the two papers:
Reinhard, Erik, et al. "Photographic tone reproduction for digital
images." Proceedings of the 29th annual conference on Computer graphics
and interactive techniques. 2002.
Reinhard, Erik, and Kate Devlin. "Dynamic range reduction inspired by
photoreceptor physiology." IEEE transactions on visualization and
computer graphics 11.1 (2005): 13-24.
The original implementation should be revisited later due to apparent
incompatibilities with the reference papers, which makes the operation
less useful.
Differential Revision: https://developer.blender.org/D16306
Reviewed By: Clement Foucault
The parallel reduction file didn't include its own header, which can
yield "no previous declaration" warnings. This patch includes the header
to fix the warning.
This patch implements generic parallel reduction for the realtime
compositor and implements the Levels operation as an example. This patch
also introduces the notion of a "Compositor Algorithm", which is a
reusable operation that can be used to construct other operations.
Differential Revision: https://developer.blender.org/D16184
Reviewed By: Clement Foucault
