This patch immediately realizes the scale and rotation components of
transformations at the point of transform nodes. The translate component is
still delayed and only realized when really needed to avoid clipping.
Transformed results are always realized in an expanded domain that avoids
clipping due to rotation or scaling. The size of the transformed domain is
clipped to the GPU texture size limit for now until we have support for huge
textures, that limit is typically 16k.
A potential optimization is to join all consecutive transform and realize
operations into a single realize operation.
Fixes#112332.
Pull Request: https://projects.blender.org/blender/blender/pulls/112332
This patch changes the image type used in the Jump Flooding Algorithm to
be Int2 instead of Float4. That's because we used to store the distance
along with the texel location, which we no longer do, so we are left
with the 2D texel location only which can be stored in an Int2 image.
We no longer store the distance because it is not necessarily needed, it
introduces a sqrt in each of the JFA passes, and it is less precise due
to storage in 16F images. Developers should compute the distance in the
user shader instead.
This is a non-functional change, but results in less memory usage,
higher performance, and higher precision.
Pull Request: https://projects.blender.org/blender/blender/pulls/112941
Previously, the Result class was reserved for inputs and outputs of
operations, so its allowed types were naturally those exposed to the
user. However, we now use the Result class internally for intermediate
results, so it now makes sense to expend the allowed types.
The types are now divided into two categories, those that are user
facing and need to be handled in implicit operations and those that
are internal and can be exempt from such handling. Internal types are
reserved for texture results, as the single value mechanism is only
useful for user facing results.
The patch merely adjusts the switch cases across the code base, adding
one new internal type as an example.
Pull Request: https://projects.blender.org/blender/blender/pulls/112414
This patch implements the Double Edge Mask node for the Realtime
Compositor. The implementation is primarily based on the 1+JFA Jump
Flooding algorithm, which was also introduced in this commit.
Pull Request: https://projects.blender.org/blender/blender/pulls/112223
Listing the "Blender Foundation" as copyright holder implied the Blender
Foundation holds copyright to files which may include work from many
developers.
While keeping copyright on headers makes sense for isolated libraries,
Blender's own code may be refactored or moved between files in a way
that makes the per file copyright holders less meaningful.
Copyright references to the "Blender Foundation" have been replaced with
"Blender Authors", with the exception of `./extern/` since these this
contains libraries which are more isolated, any changed to license
headers there can be handled on a case-by-case basis.
Some directories in `./intern/` have also been excluded:
- `./intern/cycles/` it's own `AUTHORS` file is planned.
- `./intern/opensubdiv/`.
An "AUTHORS" file has been added, using the chromium projects authors
file as a template.
Design task: #110784
Ref !110783.
This patch implements the Classic Kuwahara node for the Realtime Compositor.
A naive O(radius^2) implementation is used for radii up to 5 pixels, and a
constant O(1) implementation based on summed area tables is used for higher
radii at the cost of building and storing the tables.
This is different from the CPU implementation in that it computes the variance
as the average of the variance of each of the individual channels. This is done
to avoid computing yet another SAT table for luminance. The CPU implementation
will be adapted to match this in a future commit.
The SAT implementation is based on the algorithm described in:
Nehab, Diego, et al. "GPU-efficient recursive filtering and summed-area tables."
Additionally, the Result class now allows full precision texture allocation, which
was necessary for storing the SAT tables.
Pull Request: https://projects.blender.org/blender/blender/pulls/109292
This patch implements the Keying node for the realtime compositor. To
ease the implementation, some morphological operators were moved into
algorithms and a mechanism to steal data between results was added to
the Result class.
Pull Request: https://projects.blender.org/blender/blender/pulls/108393
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
This patch refactors the static cache manager to be split into multiple
smaller Cached Resources Containers. This is a non factional change, and
was done to simplify future implementations of cached resources as they
become more elaborate.
This patch implements the Z Combine node for the realtime compositor.
The patch also extends the SMAA implementation to work with float
textures as a prerequisite to the Z Combine implementation. Moreover, a
mechanism for computing multi-output operations was implemented, in
which unneeded outputs will allocate a dummy 1x1 texture for a correct
shader invocation, then those dummy textures will be cleaned up by
calling a routine right after evaluation.
This is different from the CPU implementation in that the while combine
mask is anti-aliased, including the alpha mask, which is not considered
in the CPU case.
The node can be implemented as a GPU shader operation when the
anti-aliasing option is disabled, which is something we should do when
the evaluator allows nodes be executed as both standard and GPU shader
operations.
Pull Request: https://projects.blender.org/blender/blender/pulls/106637
This patch implements the Anti-Aliasing node by porting SMAA from
Workbench into a generic library that can be used by the realtime
compositor and potentially other users. SMAA was encapsulated in an
algorithm to prepare it for use by other nodes that require SMAA
support.
Pull Request: https://projects.blender.org/blender/blender/pulls/106114
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
