Blender Git Loki

New Grease Pencil object for 2D animation

This commit merge the full development done in greasepencil-object branch and include mainly the following features.

- New grease pencil object.
- New drawing engine.
- New grease pencil modes Draw/Sculpt/Edit and Weight Paint.
- New brushes for grease pencil.
- New modifiers for grease pencil.
- New shaders FX.
- New material system (replace old palettes and colors).
- Split of annotations (old grease pencil) and new grease pencil object.
- UI adapted to blender 2.8.

You can get more info here:

https://code.blender.org/2017/12/drawing-2d-animation-in-blender-2-8/
https://code.blender.org/2018/07/grease-pencil-status-update/

This is the result of nearly two years of development and I want thanks firstly the other members of the grease pencil team: Daniel M. Lara, Matias Mendiola and Joshua Leung for their support, ideas and to keep working in the project all the time, without them this project had been impossible.

Also, I want thanks other Blender developers for their help, advices and to be there always to help me, and specially to Cl�ment Foucault, Dalai Felinto, Pablo V�zquez and Campbell Barton.

Merge branch 'master' into blender2.8

Fix Shape Key retime starting at frame 10

D3571 by @alm

Workbench: Correct ifndef after recent changes

Usage of matcap image uniform had different ifdef than definition
of that uniform. Assuming the usage was correct, and the definition
needed an update.

Prevents shader from compilation failure and from aborts in debug
builds.

Subsurf: Rework in a way that patches boundaries are merged together

The idea is to create vertices along the coarse edges once, without
splitting coarse edges on separate ptex faces. This requires some
indexing magic, vertices within a patch are no longer sequential.

Not sure how to make it nicer without such a black magic looking
calculations (which are basically boiling down to mimicking order
of verts/edges creation).

In the current offsets calculation loose verts and edges are not
properly taken into account, but those are causing topology refiner
to fail anyway, so it needs a bit deeper change.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D3570

Merge branch 'master' into blender2.8

BLF: replace global aa pref w/ monochrome flag

Now disabling anti-aliasing doesn't impact sequencer, render stamp etc.

Fix crash w/ missing matcaps

Building w/o EXR caused this.

Merge branch 'master' into blender2.8

UI: use text hinting (now user preference)

D3201 by @ambient w/ edits not to impact fonts used for rendering
(only change display for UI text).

UI: consistent names for edit-mode overlay

Fix T56155: Header shows in popover context menu

Merge branch 'master' into blender2.8

UI: add check for any kind of popup

Fixes T56155 when merging into 2.8

Fix build error in new build after recent merge.

Viewport: use Filmic without scene exposure/gamma/curves for workbench.

This ignores the scene color managment view settings for solid mode and
lookdev when not using scene lights and world. The scene settings are
intended for tweaking renders and should not affect studio lighting and
matcaps.

There may be cases where a simple sRGB transform is better than Filmic
and we could add configuration for this. Not sure if it really matters
and it may be better if we just assume matcaps and studiolights are all
created for one view transform.

Differential Revision: https://developer.blender.org/D3569

Merge branch 'master' into blender2.8

UI: make horizontal wheel scroll in 2D view match vertical scroll speed.

Clean Keyframes operator tweaks

By popular demand, the CLean Keyframes operator will now
leave handles and other interpolation settings untouched.

Previously, it would recreate the keyframes from scratch,
keeping only the frame + value, under the assumption that
the handle information was "bad" (i.e. the source of bumps
and roughness, due to bad hand tweaking). However, since
most animators use this on hand-keyed animation instead of
motion-capture data, this assumption didn't hold, and was
actually overly destructive - wiping out lots of hand-adjusted
curve data.

Minor cleanup.