Blender Git Loki

use getters and setters for Light

use getters and setters for Film

Removes Film::modified and several calls to Film::tag_update, and adds a
few more sockets.

use getters and setters for the Integrator

add alembic procedural code

start refactoring the Geometry nodes to make use of the getters and setters

use getters and setters for the Camera

Cycles: add update flags to Node and SocketType

Those flags are meant for detecting which socket has changed, so in the
future we can have more granular updates.

`Node` now stores an `update_flags` member which is modified every time
a socket is changed though `Node::set`. The flags are or-able bits
stored in `SocketType` instances. Each `SocketType` stores a unique bit
out of 32, for the 32 bits of an unsigned integer type; the bit
corresponds to the index of the socket in the `Node`'s sockets array +
1, so the socket at index 5 will have the 6th bit set as its flag. This
limits us to 32 sockets per Node, which should be plenty for the current
set of `Nodes` that we have.

This does not change the behavior of other parts of Cycles.

This is part of T79131.

Maniphest Tasks: T79131

Differential Revision: https://developer.blender.org/D8644

add macros to define getters and setters

Post Review: Minor fixes, renaming, removing confuisng comments

Cleanup: GPUVertBuf: Replace GPU_vertbuf_create by GPU_vertbuf_calloc

This is a simple cleanup to make naming consistent with the rest of the
module.

GLTexture: Fix crash with --debug-gpu on windows + nvidia

The combination of DSA + CubeMap seems to not please this driver.

GPUVertBuf: Make GPUVertBuf private to the GPU module

This is just a cleanup to isolate the internals of the vertbuf.
This adds some getters to avoid refactor of existing code.

Cleanup: GLBackend: Fix missing override keywords producing warnings

GPUIndexBuf: GL backend Isolation

This is part of the Vulkan backend task T68990.

There is no real change, only making some code re-organisation.
This also make the IndexBuf completely abstract from outside the
GPU module.

Cleanup: GPU: Rename GPU_element to GPU_index_buffer

Makes it follow the functions names.

GPencil: Remove console warning in RENDER_PT_gpencil panel

COMPAT_ENGINE was missing

GPencil: Cleanup unused code

The poll method is not used

Added a new compare flag `do_compare` for run-test

do_compare is set to False if no comparison is needed, like when running
run-test for investigation purpose

Added apply_modifiers flag for run-test and run-all-tests

Merge branch 'master' into soc-2020-testing-frameworks