This patch adds support for full precision compositing for the Realtime
Compositor. A new precision option was added to the compositor to change
between half and full precision compositing, where the Auto option uses
half for the viewport compositor and the interactive render compositor,
while full is used for final renders.
The compositor context now need to implement the get_precision() method
to indicate its preferred precision. Intermediate results will be stored
using the context's precision, with a number of exceptions that can use
a different precision regardless of the context's precision. For
instance, summed area tables are always stored in full float results
even if the context specified half float. Conversely, jump flooding
tables are always stored in half integer results even if the context
specified full. The former requires full float while the latter has no
use for it.
Since shaders are created for a specific precision, we need two variants
of each compositor shader to account for the context's possible
precision. However, to avoid doubling the shader info count and reduce
boilerplate code and development time, an automated mechanism was
employed. A single shader info of whatever precision needs to be added,
then, at runtime, the shader info can be adjusted to change the
precision of the outputs. That shader variant is then cached in the
static cache manager for future processing-free shader retrieval.
Therefore, the shader manager was removed in favor of a cached shader
container in the static cache manager.
A number of utilities were added to make the creation of results as well as
the retrieval of shader with the target precision easier. Further, a
number of precision-specific shaders were removed in favor of more
generic ones that utilizes the aforementioned shader retrieval
mechanism.
Pull Request: https://projects.blender.org/blender/blender/pulls/113476
This patch changes how wrapped translations are handled by the Realtime
Compositor. Previously, translations were always stored on the result
and delayed until automatically realized later. The wrapping status was
also stored to control this later automatic realization.
This patch changes that such that translations are immediately realized
for the axes that has enabled wrapping. Consequently, the image will not
get translated, but its content will, in a clip on one side, wrap on the
opposite side manner.
Another change is that wrapping information is no longer propagated to
future automatic realizations, so tilling or repeating an image is no
longer possible. An alternative method of repetition will be introduced
in a later patch.
Pull Request: https://projects.blender.org/blender/blender/pulls/113669
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
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 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
Straightforward port. I took the oportunity to remove some C vector
functions (ex: copy_v2_v2).
This makes some changes to DRWView to accomodate the alignement
requirements of the float4x4 type.
Straightforward port. I took the oportunity to remove some C vector
functions (ex: `copy_v2_v2`).
This makes some changes to DRWView to accomodate the alignement
requirements of the float4x4 type.
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
Currently, the realtime compositor treat vector types as 3D vectors,
which is true for most operations. However, some operations deal with
vector types as 4D vectors that encode two 2D vectors or one 3D vector
with the last component ignored. So this patch expands vector types to
include a fourth component that is only sometimes used.
Since we already stored vectors in RGBA textures, the necessary changes
are straightforward and are mostly concerned with adjusting the Result
class.
Differential Revision: https://developer.blender.org/D16359
Reviewed By: Clement Foucault
This patch adds the core realtime compositor evaluator as well as a
compositor draw engine powered by the evaluator that operates in the
viewport. The realtime compositor is a new GPU accelerated compositor
that will be used to power the viewport compositor imminently as well as
the existing compositor in the future.
This patch only adds the evaluator and engine as an experimental
feature, the implementation of the nodes themselves will be committed
separately.
See T99210.
Differential Revision: https://developer.blender.org/D15206
Reviewed By: Clement Foucault
Omar Emara
Campbell Barton
Sergey Sharybin
Clément Foucault
Ray Molenkamp