In some/many cases, an `ImBuf` is allocated, and all the pixels are
immediately filled by some code. Doing the memory clear within allocation
is just memory traffic for no good reason.
Add a flag to skip initialization of ImBuf pixels (IB_uninitialized_pixels)
and use that in some parts of VSE effects/rendering/cache/scopes, as well
as image loading code.
Rendering out VSE movie, on Windows/VS2022/Ryzen5950X:
- Sprite Fright: 443sec -> 414sec (takes 93% of previous time)
- Gold previs: 367sec -> 325sec (takes 88% of prev time)
Pull Request: https://projects.blender.org/blender/blender/pulls/118321
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.
