Blender Git Loki

Fix T74504: Cycles wrong progress bar with CPU adaptive sampling

Fix error in Cycles Optix adaptive sampling after recent cleanup

Merge branch 'master' into greasepencil-object

GPencil: Add custom curves to some modifiers

This allows to customize the effect along the stroke.

Cleanup: VFont: Move to IDTypeInfo and remove unused BKE API

This was particularly strange because we had a _free_data() function.
But still the one I replaced was of course the _free() one.

And we should rename the _free_data_ function later to avoid confusions.

Cleanup: Text: Move to IDTypeInfo and remove unused BKE API.

API Docs: Point to manual for Operator Cheat Sheet

UI: Remove Windows 3D Object Folder Reference

Remove Windows special folder FOLDERID_Objects3D. Requires newer SDK.

Differential Revision: https://developer.blender.org/D7014

Reviewed by Brecht Van Lommel

GPencil: Fix errors after merge

Merge branch 'master' into greasepencil-object

Conflicts:
source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c
source/blender/draw/engines/gpencil/gpencil_engine.c
source/blender/editors/gpencil/drawgpencil.c
source/blender/editors/gpencil/gpencil_fill.c
source/blender/editors/gpencil/gpencil_interpolate.c
source/blender/editors/gpencil/gpencil_paint.c
source/blender/editors/gpencil/gpencil_sculpt_paint.c
source/blender/editors/gpencil/gpencil_utils.c

GPencil: Remove unused DRW_gpencil_freecache() function

This free function was used in the old implementation, but in the new produces crashes when deleting an object.

GPencil: Remove Angle Split from Multistroke Modifier

This function is not clear how use it and it's getting segment faults. As the original developer that knows the function is not available, we remove the function and pending of adding in the future.

Cleanup: tweak Freestyle #includes in preparation for clang-format sorting

Cleanup: Fix forward declaration of headers

Cleanup: Rename ARegion variables from ar to region

The old convention was easy to confuse with ScrArea.
Part of https://developer.blender.org/T74432.

This is mostly a batch rename with some manual fixing. Only single word
variable names are changed, no prefixed/suffixed names.

Brecht van Lommel and Campbell Barton both gave me a green light for
this convention change.

Also ran clan clang format on affected files.

Cleanup: Image: Move to IDTypeInfo and remove unused BKE API.

Cleanup: Texture: Move to IDTypeInfo and remove unused BKE API.

Cleanup: Material: Move to IDTypeInfo and remove unused BKE API.

GPencil: Fix stroke duplication error in Fill data

Fix build error on windows

```
Error C4013 '_VA_ELEM1' undefined; assuming extern returning int
```