Blender Git Loki

Fix wrong usages of region align enumerations

`ARegion.alignment` unfortunately is a mixture of value and bitflag
enumerations. When checking for left/right/top/bottom region alignment,
the flags have to be masked out usually.
Most of the fixed cases here probably didn't cause issues in practice,
but could in fact break at any point when surrounding logic changes.

In fact the assert in #region_visible_rect_calc() failed in an older
file from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949035. This
fixes it.

Merge branch 'blender-v2.82-release'

Fix T72887: Outliner crashes when after undo of some linking operation.

Outliner tree building code was not handling properly empty libraries
(i.e. Lib datablocks in our bmain which have no used actual data
anymore).

Main issue here is unclean states of indirect hierarchies of linking
involving several libraries after undo operation.

This is not a critical issue though, just annoying and untidy.

Fix EEVEE: Planar Reflection data has inverted facing

Unreported bug

Fix T71788 Invalid (pink) shader when using wireframe node

This was caused by the clip distance not being passed by the geometry
shader.

Fix T70766 EEVEE: Performance drop with node tree in 2.81

Merge branch 'blender-v2.82-release'

CMake: Fix linking of ffmpeg_test on macOS

Part of the issue was missing library path to png library.
Other part was missing iconv passed to linker.

Fix T68000: load previous settings error if config folder already exists

This happened when opening Blender and not clicking Load Previous Settings
or Next, and then reopening Blender again and using Load Previous Settings.

Fixes after first code review

Fluid: Fix for mesh velocities

Was using incorrect file format when reading mesh velocities from cache

Merge branch 'master' into cycles_texture_cache

Cleanup: Clarification of the `Particle.uv_on_emitter()` function docs

Just some rewording of the documentation of `Particle.uv_on_emitter()`,
so that it no longer refers to 'derived mesh' but 'evaluated mesh', and
document that it expects a modifier from an evaluated object.

No functional changes.

Fix T73121: Blender crashes on accessing particle uv_on_emitter

Blender wasn't checking whether the passed modifier actually contained an
evaluated mesh, before accessing the mesh pointer.

Create duplication of material array for eval datablock

If this copy is not done, when the datablock is cleared, the first datablock that use the material array, destroy the array, and in the second time the pointer is used, it's invalid.

Now, each datablock, uses its own material array.

Merge branch 'blender-v2.82-release'

Fix crash with Proportional Edit Connected in UV editing

Caused by rB86a2ffc3ab32

UI: Use same precision in "Move" redo panel as elsewhere

The floating "Move" redo panel showed transform values with less
precision than in other places (e.g. sidebar and properties editor).
With Millimeters as unit it would even round to full integers, which
may be an issue since you typically work at higher precisions with this
unit.

Note that this only applies to the visual precision, internally we use
full floating point `float`s still.

Fixes T70367.

UI: Show animation cancel button in all status-bars

Previously the button would only show up in the status-bar located in
the same window that had the screen with the animation timer.
I don't see a reason not to show the button in all status-bars instead,
other animation feedback is also displayed in all windows.

Fixes T72194.

Merge branch 'blender-v2.82-release'