Blender Git Loki

Fix T82617: artifacts in Cycles viewport when changing subdivision attributes

The old attributes were not cleared when synchronizing the geometries, this could also lead to crashes in other cases.

Ref T82608.

Merge branch 'blender-v2.91-release'

Merge branch 'blender-v2.91-release'

Merge branch 'lanpr-under-gp' into temp_lineart_contained

Fix T82093: Sampled Colors Mismatch When Painting (Partial)

When painting in the image editor on data images (Non-color, Raw) the
color mismatched between the sampled color and the actual effect that
the painting has on the image. The root cause is that the sampling is
color managed, but the painting still uses a fixed color management
pipeline with a lot of assumptions. Due to recent changes the drawing
of the image editor is color managed, but the painting isn't what made
these changes show up.

This patch is a work-a-round so that the sampled colors and the effect
the paint has on the texture matches. This isn't the correct solution
as that would be to migrate all the painting tools to use proper color
management.

Reviewed By: Pablo Dobarro

Differential Revision: https://developer.blender.org/D9411

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

Fix T81673: Color picker picks up UI and Overlay

There are two implementations of the Sample Color operation. One is used
by the paint texture and one by the image editor. The image editor
variant sampled from the ibuf directly, but the paint texture variant
was sampling from the screen front buffer. This can lead into incorrect
samples due to color pipeline.

This patch will use the image editor variant when sampling a color for
2d texture painting

Reviewed By: Pablo Dobarro

Differential Revision: https://developer.blender.org/D9408

LinrArt: Running line art modifier.

LineArt: Cmake stuff migration.

Cleanup: split view3d_placement depth & orientation calculation

Split out functionality needed for preview plane drawing.

Cleanup: clang-tidy, remove invalid comments

Cleanup: Imperative tense in property description

LineArt: Remove modifiers access.

WIP: new UsdCameraReader class.

Also added logic to instantiate the camera reader
when traversing the USD stage. Not all camera
parameters are being set yet.

LineArt: Remove SceneLineArt.

LineArt: Move files to gpencil modifier folder.

ImBuf: pass the number of bytes read to 'is_a' callbacks

Previously the header was a fixed size and assumed to be zeroed.
Now read in bytes up to `HEADER_SIZE`, pass the number or bytes
read to the callback which must not read past those bytes.

Cleanup: RNA ID enum utility function

- Avoid calling `GS(id->name)` on each iteration.
- Remove unused arguments.
- Pass `const ID *` to the filter callback.

Cleanup: spelling

Cleanup: warnings