Blender Git Commits

Cycles X: Remove redundant field in path trace works

Render buffers are available via the base class, no need to duplicate
it in the derived classes.

Cycles X: Initialize all fields of buffer params

Allows to rely on default constructor and follow-up call of
modified() without accessing non-initialized fields.

Cycles X: Initial support of multi-GPU and GPU+CPU rendering

This change makes it possible to render single frame on multiple GPUs
and/or GPU(s)+CPU. (as configured in the User Preferences).

Work is split equally along the height of the big tile.
In the future this will be looked into to perform better initial guess
based on devices performance, dynamic re-scheduling, and interleaving
scanlines across devices.

The main idea is to move render buffers to per-work basis, so that the
ender buffers are always associated with the device work is being done
by. And then upon access delegate the read/write to the work, so that
it operates with a specific slice in the source/destination,

There are some multiple memory and performance improvements possible,
like:

- Copy render result to GPUDisplay from multiple threads (now when it
is clear graphics inetrop can not be mixed in with naive update).
- Avoid denoiser buffer re-allocation.
- Avoid creation of temporary buffers in the denoisers when we know
that we have a copy of real buffers.
- Only copy passes needed for denoiser, and results of denoiser.

The current state of the `PathTrace::denoise()` is not entirely ideal:
it could be split up, and memory usage could be improved. But think it
is good enough for the initial implementation. The further improvements
would require changes in the Denoiser API.

Differential Revision: https://developer.blender.org/D11727

Fix Cycles X multi-device type generation

The info type can not be set to first device type because the device
might be ignored. So delay type assignment until we have a device which
is known to be used.

Fixes issue in viewport when OptiX+OptiX will be considered an OptiX
device with 2 sub-devices, and OptiX+OptiX+CPU will be considered a
Multi device. The issue with the latter one is that the info IDs in
both cases are the same, but not the type, making it a wrong comparison
in `DeviceInfo::operator==`.

Differential Revision: https://developer.blender.org/D11729

LineArt: Back face culling.

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Merge branch 'master' into soc-2021-vse-strip-thumbnails

Merge branch 'master' into tmp-vulkan

Merge branch 'master' into refactor-vertex-group-names

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Merge branch 'master' into curve-nodes-modifier

Merge branch 'master' into curve-nodes-modifier

LineArt: naming change floating->loose

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Merge branch 'master' into curve-nodes-modifier

Merge branch 'master' into curve-nodes-modifier

Merge branch 'master' into curve-nodes-modifier

More cleanup, displist still shows up when it shouldn't (no mesh in data_eval)

Cleanup: Rename variables

Merge branch 'master' into curve-nodes-modifier