Previously this was the double the CPU count because:
- Modern CPU's from AMD & Intel support SMT/hyper-threading which
present twice as many cores, doubling again has little to no benefit.
- Using 2x or 4x the number of physical cores number can use a lot of
memory on systems with many cores which are becoming more common.
- 'make check_spelling_shaders' now checks MSL & GLSL spelling.
- Add '--match' argument to 'check_spelling.py' for more configurable
checks without relying on picking directories that only contain the
desired file-type.
- Ignore spelling for scripts/addons & scripts/addons_contrib.
When GLSL sources were first included in Blender they were treated as
data (like blend files) and had no license header.
Since then GLSL has been used for more sophisticated features
(EEVEE & real-time compositing)
where it makes sense to include licensing information.
Add SPDX copyright headers to *.glsl files, matching headers used for
C/C++, also include GLSL files in the license checking script.
As leading C-comments are now stripped,
added binary size of comments is no longer a concern.
Ref !111247
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.
