Blender Git Loki

Fix remaining issues with new Scene copying.

Some idprops were not correctly merged from source into destination.

Bring new IDP_MergeGroup() on par with other copying logic.

We now have to support more complex copying types, which are controlled
by flags, so all copying logic will need to take those at some point (at
least, all potentially dealing with IDs).

Fix building with OCIO after recent gawain files renamings.

Cleanup: use 'gwn' prefix for gawain filenames

Looking up names project wide or setting breakpoints wasn't so.
Names like common.h or element.h are also too generic.

Correct last commit

Fix scene_collection_copy always afecting IDs usercount.

_copy_data() functions shall not do that at all anymore. Kept as option
for now even though that helper is only called from here...

Also moar varnames renaming to standard _src/_dst sufixes.

Cleanup: rename vars with proper _src/_dst postfixes in new Scene ID data copy func.

Cleanup/refactor: no new general arg-less macros enforcing var names please!

We do have an history of those pieces of evil in our code, would be nice
to get fully rid of it, but at the very least let's not add more of them
in new code. :)

Fix new Scene ID copying code.

Missed depsgraph_legacy new pointer to nullify when merged/adapted new
ID copying code to blender2.8.

Merge branch 'master' into blender2.8

# Conflicts:
# source/blender/makesrna/intern/rna_render.c

Manipulator: border editable only w/ selected camera

While this isn't really needed, active border was annoying.

Alembic import: report object name in face color index out of bounds error

Alembic import: fix crash when face color index is out of bounds.

This can happen with Alembic files exported from Maya. I'm unsure as to the
root cause, but at least this fixes the crash itself.

Thanks to @looch for reporting this with a test file. The test file has to
remain confidential, though, so it's on my workstation only.

[deps_build/macOS] Fix FFMPEG & VPX configure command

FFMPEG & VPX don't handle target with --build parameter, so we need to make sure use of plain configure command

Reviewed by: Brecht Van Lommel
Differential Revision: https://developer.blender.org/D2791

Fix blenderplayer

Error in last commit

Get/set mismatch, reading from pchan, writing to bone.

Manipulator: Add b-bone spline editing

This needs some improvements since
matching handles *exactly* is a bit involved.

Manipulator: grab3d use own vars to store offset

Was complicating general use case, also support for transforming with matrix_space set.
Add matrix_space support for manipulator_window_project_2d too.

Manipulator: store initial-final matrix for reuse

Also take matrix_space into account when calculating final pixel size.

Cycles/BI: Add a pixel size option for speeding up viewport rendering

This patch adds "Pixel Size" to the performance options, which allows to render
in a smaller resolution, which is especially useful for displays with high DPI.

Reviewers: Severin, dingto, sergey, brecht

Reviewed By: brecht

Subscribers: Severin, venomgfx, eyecandy, brecht

Differential Revision: https://developer.blender.org/D1619