Blender Git Loki

Merge branch 'master' into temp-gpencil-drw-engine

GPencil: Fix missing Fill area when drawing an stroke

There was a mistake in the shading group name.

Finish VR view drawing callback set up

* Allow passing custom data to session draw function, passed to the
callback
* Actually call the callback
* Create and bind a WM level callback. Will later be used to draw the
viewport.

Also, check if session is actually visible before drawing.

GPencil: Remove redundant parameter

Cleanup: fix compiler warnings

Masking: make image editor UI consistent with clip editor

* Mask Display menu is now part of the header
* Sidebar now has a separate Mask tab
* Add context menu when in mask mode

Differential Revision: https://developer.blender.org/D5102

Don't use Microsoft::WRL::ComPtr<...> for COM types

Makes things difficult if you're not familar with COM.

Fix T66166: NLA invisible source list selection

GPencil: Initial changes to redesign the layers blend modes.

These changes were proposed by @fclem in order to make more efficient the engine.

Still WIP: NO layers blend modes working and no clamp.

DRW: Add RGBA16 support for framebuffers

This avoid assert.

Fix T65010: Affect options not being displayed in the UV editor snap settings.

Reviewers: brecht, billreynish

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5141

use one block allocator per thread instead of per block

Cleanup: EditMode: Remove uneeded shader depth bias

The bias is done using the DRWView now, no need to double it.

Fix T66119: Assert editing Lattice

ObjectMode: Fix selection points of LightGrids

DRW: Fix point shaders not using gl_PointSize

All Shaders inside DRW should use gl_PointSize.

USD: support for simple preview materials

Very simple versions of the materials are now exported, using only the
viewport diffuse RGB, metallic, and roughness.

When there are multiple materials, the mesh faces are stored as geometry
subset and each material is assigned to the appropriate subset. If there
is only one material this is skipped.

The first material if any) is always applied to the mesh itself
(regardless of the existence of geometry subsets), because the Hydra
viewport doesn't support materials on subsets. See
https://github.com/PixarAnimationStudios/USD/issues/542 for more info.

Note that the geometry subsets are not yet time-sampled, so it will
break when an animated mesh changes topology.

Merge branch 'master' into greasepencil-object

Conflicts:
source/blender/draw/engines/gpencil/gpencil_draw_utils.c

Cleanup: GPencil remove DRW_ prefix for internal functions.

The prefix DRW_ must be used only for modules inside Draw Manager and not in the Engines.

keep track of newly allocated blocks