Blender Git Loki

Bring DCI colorspace configuration for DCP creation

Based on LUT and XYZ conversion matrix from OpenDCP.

Expose already-existing DCI view of Display transform (which was
hidden by color management changes for 2.80). Introduce an input
LUT which is what OpenDCP is doing and what makes the output of
Blender's DCI match OpenDCP result.

Additionally introduce DCI Filimc which will first perform filmic
conversion before the rest of DCI conversion. This allows to export
EXR images sequence directly from Blender as if it was first exported
to PNG/TIFF first.

This is a sub-optimal, but is something we use at the studio to deal
with DCP at this time.

Test to see if expression is accepted

GPencil: Fix problems after merge

Some functions have changed and the icons was not displayed as expected.

Merge branch 'master' into asset-greasepencil

Conflicts:
source/blender/blenkernel/intern/icons.cc

Add BKE_id_attribute_ensure to avoid creating multiple layers for the
same attribute.

Add a error return value for specifying error messages.

Merge branch 'master' into temp-abc-features

Sculpt: fix compile error

Missing #ifdefs for instant meshes

GPencil: Fix(unreported) Dash modifier wrong logic.

When the modifier iterates to an empty layer with no frame it will return,
while the correct logic is to continue.

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

Sculpt: New "auto-fset" setting

Added a new "auto face set" setting for brushes.
It basically invokes the draw face set tool,
with a few differences:

* The painted face set is fixed by user setting.
* More then one face set can be created,
these are assigned based on distance to
the stroke line.
* TODO: write a proper API for wrangling stroke
curves (should interpolate at least G2!).

The point of this is to enable better hard surface
brushes. Since the settings are extremely finicky
I've added an example of one (based on clay strips)
to startup.blend.

The necassary steps to make a hard brush out of this
are as follows:

1. Autosmooth: ~0.4;
2. Autosmooth radius scale: ~1.5.
3. Auto fset: on.
4. Hard edge mode: on (but turn off inherit).

Sculpt-dev: fix compile errors for quadriflow

. . .when compiled with threading on (for quadriflow).
Still off however.

Use a generic function to operate on attribute to ensure that all types
are always supported.

Cleanup: pass prop name instead of prop

This will allow for more genericity.

USD export: fixed linux an mac compile error.

Import changes from attribute review branch

USD IO: attribute conversion improvements.

Initial implementation of logic to import USD
attibutes as Blender custom properites, with options
to import all custom attributes or only those
attibutes in the 'userProperties' namespace.

New export option to add custom properties to the
'userProperties' USD attribute namespace. This
option is enabled by default.

Removed hidden functionality where custom properties named
with the prefix 'USD_' were being saved to properties on the
USD prim that have the same name, without the prefix. This
code was not type safe and could lead to unexpected behavior
in case of accidental property name collisions.

Added support for converting between USD int, float and
double vectors and Blender array type custom properties.

Merge branch 'master' into temp-abc-features

Fixes for Cycles source reorganize

USD IO: enable presets.

Enable Operator Presets drop down menu
for the USD import/export operators.