Blender Git Loki

GPencil: Add frame parameter to deformStroke callback

This parameter can be necessary for some new modifiers in development. The parmeter was already there but it was removed, now we back again the parameter.

Mesh Batch Cache: Refactor part 4

- Add edge factor support (with less hack + multithread support)
- Add Facedots pos/nor/flag support
- Add Loop normal support

Mesh Batch Cache: Refactor part 3

- Add subrange usage for material triangles
- Add loose edges/verts support for Mesh
- Cleanup eval mesh selection
- Add use_hide support
- Add selection index Vbos
- Add edit data vbo
- Add dummy edgefac vbo

Mesh Batch Cache: Refactor part 2

- Add extract_points indices
- Enable tri/line/point extract and pos_nor attrib.

Mesh Batch Cache: Refactor part 1

- Start refactoring MeshRenderData and mesh_render_data_create_ex
- Add Iter functions
- Add dummy callbacks
- Add some Extract types (not enabled)

Mesh Batch Cache: Refactor start

- Put placeholders vbos/ibos
- Restructure the buffers cache : One cache for final mesh and one for the
edit mesh cage.

GPU: Batch: Reverse order of VBO binding

This is to ensure the vbo[0] always has predecence over other VBO.

This is important for overriding attributes by switching vbo binding order.

GPU: Vertex Format: Bump max name per attribute to 6

This is to add pos as an alias to UVs.

GPU: Add vertex format deinterleaving

This makes it possible to have each attrib use a contiguous portion of the
vertex buffer, making attribute filling much more easy and fast as this is
how they are store in blender Custom Data layers.

GPU: Add GPUIndexBuf subrange

This allows to render only a subset of an index buffer.
This is nice as we can render each material surfaces individually and the
whole mesh with the same index buffer.

Pre-reserve memory to reduce reallocation

Cloth: initial steps for obstacle metric

USD: prevent crash when writing hair system with empty pathcache

Not sure what causes `psys->pathcache` to be `nullptr` in the first place,
but at least this prevents Blender from crashing.

LANPR: Use GPU_BATCH_DISCARD_SAFE marco.

LANPR: Remove useless GPU_ATTACHMENT_LEAVE flags.

LANPR: Renamed freestyle edge mark constant into lanpr.

LANPR: Edge/face mark UI now forllows LANPR checkbox.

LANPR: Remove freestyle #ifdef's.

LANPR: Rename freestyle edge mark functions to LANPR.

Cleanup: Replace if else if, by Switch