Blender Git Loki

Cleanup: minor changes to reduce code duplication

D4236 by @sobakasu w/ edits.

Cleanup: de-duplicate font loading code

Part of D4236 by @sobakasu

Cleanp: use single global for draw manager

Add 'G_draw' for all draw manager globals,
avoids adding extern to each file.

Connection between `ts` and `globals_ubo` wasn't obvious,
now called `G_draw.block` & `G_draw.block_ubo`.

Cleanup: use const args

Fix error in last commit

Cleanup: use DRW_shader_create_from_arrays

Avoids messy conditional defines and inline lib allocation.

DRW: Add DRW_shader_create_from_arrays utility

While verbose, this is a more flexible way to construct shaders.

Libs & defines can be optionally included for each shader type
which was previously done with inline string creation.

Cleanup: remove redundant '_sh' suffix, add '_shgrp'

Cleanup: rename shader containers

These only contain shaders, so name Shaders instead of ShaderData.

GP: Cleanup previous commit

Fix T60714: Avoid creation of nested objects

In grease pencil is not logic add an object inside other object in edit mode. The object must be created only in Object mode.

GP: Fix memory leaks when use cutter with weights

There were some issues when copy the weights and other memory leaks.

Also some code cleanup.

Fix keymap preferences UI layout issues for modifier keys.

Fix T60683, T60662: Cycles render crash in edit mode for certain meshes.

DRW: Fix corner indices order in clipping plane setup

Fix T60667: Eevee: reflection plane bug in rendered view.

Fix clipping shaders with some AMD/Intel drivers

Caused:
error: unsized array index must be constant

Use hard coded number of clipping planes, copying the 4th to 5 & 6
when only 4 are used.

Fix T60709: Apply Object Transform does nothing by default

GPUShader: Add GPU_VERTEX/FRAGMENT/GEOMETRY_SHADER defines

This makes it possible to have some code specific to each shader inside a
shader library.

T60701: GP using cutter tool on stroke with vertex group crashes blender

Cleanup: add clarifying comments for recent NUMA fixes.