Blender Git Loki

IDTypeInfo: add .blend file io callbacks

This is part of T76372.
It adds the `blend_write`, `blend_read_data`, `blend_read_lib`
and `blend_read_expand` which correspond to the various
steps when reading and writing .blend files.
Having these callbacks allows us to decentralize the blenloader
code a lot more. This has the affect that code related to any
specific ID type is less scattered.

Reviewers: mont29

Differential Revision: https://developer.blender.org/D8670

Fix T80149: Cycles OpenCL baking broken after changes to uses tiles for baking

We forgot to update this code as part of D3108. I'd like to include this in 2.90,
it's entirely broken now so can't really get any worse.

Differential Revision: https://developer.blender.org/D8738

Cleanup 'make vertex parent' operator code.

More localized variables, avoid ugly 'offset by one' index usage in
favor of explicit `INDEX_UNSET` define, etc.

No behavior change expected from this commit.

LineArt: More fluent viewport manipulation (canceling sequence optimization)

LineArt: Better manuverability with quick cancel.

Merge branch 'blender-v2.90-release' into master

Fix T80135: Duplicate doesn't preserve active spline

Checks to preserve the active spline on duplication
required an active vertex too.

Now having no active vertex doesn't prevent duplicate
from keeping the spline active.

Reviewed by: @mano-wii

Ref D8729

Cleanup: use doxy sections in interface_panels.c

Cleanup: spelling

LineArt: Feature line compatible clipping.

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

Fix (unreported): Walk expansion on scene collection

Left walk navigation while the scene collection is active would collapse
the subtree which shouldn't be allowed. This adds another check to
`outliner_item_openclose` to prevent collapsing the scene collection.

Introduced in rBb077de086e14.

Fix: Outliner walk navigation in Data API mode

Because the subtrees in Data API mode are empty for performance reasons,
it was impossible to move through the tree with walk navigation. This
adds an exception to allow walk navigation to expand subtrees in that
mode.

Fix ngon_tessellate filling the holes.

Fix several issues from the commit {rBefab0bc704ece3a}.
Previously, `ngon_tessellate` was filling the holes instead of
triangulating around them by using the "triangle-fan" method.

Now it triangulates around the holes and doesn't fill them.

Fix T80159: Custom Normals Averaging crash after clearing
custom split normals data

Clearing custom split normals would get rid of the CD_CUSTOMLOOPNORMAL
layer - but editing data `lnor_spacearr` would be kept.

Adding a CD_CUSTOMLOOPNORMAL layer (if none exists yet) should be done
in `edbm_average_normals_exec` / `BKE_editmesh_lnorspace_update` /
`BM_lnorspace_update` / `BM_lnorspacearr_store`. The thing is that if
the editing data `lnor_spacearr` would still be valid after `Clear
Custom Split Normals Data`, blender would happily call
`BM_lnorspace_rebuild` instead. Doing that without a CD_CUSTOMLOOPNORMAL
layer is asking for trouble.

Now clear lnor_spacearr on `Clear Custom Split Normals Data` as well.

Thx @mont29 for feedback here.

Maniphest Tasks: T80159

Differential Revision: https://developer.blender.org/D8730

UI: Avoid redundant loops in region panel handler

Currently the panel handler loops through every block and every button
for every single panel. This commit moves that check to happen a single
time at the beginning.

Fix T68317: Panel "A" key doesn't collapse subpanels properly

We need to only collapse or expand the first panel under the cursor
rather than all of them. Note that whether the parent panel or
the subpanel is first depends on the order of the uiBlocks in the
region's list.

Clang Tidy: Fix warning

Fix readability-static-definition-in-anonymous-namespace in new code

UI: Cleanup / refactor region panel event handling

The code for handling panel events was much more complicated than it
needed to be. This commit removes some unecessary function calls and
variables, reduces indentation levels by returning early, and does
some other general cleanup.

GPencil: Don't convert color to sRGB

The color is linear, so the conversion is breaking the real color.