Blender Git Loki

Introduce functions/options to indicate the type of render

We should be able to differentiate between OpenGL render (viewport
render), offline render (F12), and view render (viewport draw).

This allows for us preventing offline render to skip mode drawings, grid, ...
Even OpenGL render can benefit from this forcing a higher quality
anti-alias and sampling than the viewport drawing.

I'm not sure if it's clever to keep the memset(0x00) outside the render
loop function as it is in this patch. An alternative is to just pass the
render "type" as a flag to the render function, and set DST.options
inside it. (I may change this tomorrow, I will wait to hear from
Campbell on that).

Added invalidate for transform ops.

Can now keep clnors when transform ops are applied. As now invalidation for each function is harder to keep track of, Added a function which rebuilds all the lnor spaces in the mesh when BM_lnorspace_rebuild is called to detect if any unmarked spaces are rebuilt.

Fix: Icon alignment for scaled pie buttons with no text

Clean node names and organize menus for eevee

This makes the node menus aware of the Cycles/Eevee distinction, and
only show the relevant nodes for the current engine. Names have also
been changed to accomodate for the new output node system.

Implement Eevee output node system

This makes Eevee consistent with Cycles, by having a single output node,
and multiple shader nodes that connect to it.

Note that node systems for Eevee saved before this will be missing the
output node, and thus will show an invalid material. This is easily
resolved by connecting the shader output to a new output node.

Add Mesh and Key support to new copying code.

Make object copying fully compatible/aware of new copy flag system.

(continuation of previous WIP commit, sorry about that one :/ ).

This commits changes quite a few things, distributing new copying flags
into sub-data copying code (mostly concerns ID refcounting or not).

It also removes ID refcounting handling from Modifiers' copy callback
(this was ugly from the start, proved to be problematic in current
master, and generally bad practice). This is now done by calling code.

Also, it brings back ID refcounting handling to main BKE_library's copy
code, which means in generic ID copying lower-level IDType-specific copy
code should not use it at all. Support at lower-level remains needed
though, unfortunately, to cope with partial copying tools etc.

Alembic tests: make failures a bit easier to diagnose.

Fix T51762: Unit test script_alembic_import is failing.

Implemented workaround for use with the legacy depsgraph.

Fixed bl_load_py_modules / script_load_modules unit test

It tried to assert that
addons/io_blend_utils/blender_bam-unpacked.whl/__init__.py was loaded when
the io_blend_utils module was imported. However, this happens only on
demand, and not directly when importing the add-on.

Use for/else instead of setting 'ok' variable.

This is more efficient, and this use case is exactly what the else clause
is for.

Removed trailing spaces

Fix (unreported) missing Image usercount increase when copying UVProject modifier.

Fix (unreported) bad copying code of Surface Deform modifier.

Fix compiler warnings from own recent rB0d5c7e5e36b9.

Fix (unreported) bad copying of Ocean modifier.

Was needlessly complicated code, forgot to copy a value (foam_fade), and
was utterly leaking memory!

Fix (unreported) bad copying code in Mesh Deform modifier.

Fix (unreported) Dynamic Paint modifier not increasing ID usercount in copy function.

*Sigh* One more example of why we should keep ID management handling in
as few places as possible! It's impossible to keep more than a few
places in sync regarding which ID pointer is refcounted etc.

Fix (unreported) memory leak in Fluid modifier copying.

Also generally simplify/sanitize this copy code.

WIP