Blender Git Loki

Fix Cycles build error with OpenImageIO 2.x.

GP: Cleanup some lowercase texts

GP: Don't activate Fill for new materials

As the fill color alpha is set to zero, it's better keep fill option disabled.

GP: Avoid eraser in empty frames and add warning.

Also capture event to avoid Move transform.

Note: Now it's using a report message. Maybe this can be removed, but without the message, the event is captured by move transform.

GP: Do not draw in Locked or Invisible layers

It's weird to draw in a layer where the stroke cannot be seen or is not saved.

Cleanup: replace Main ID's foreach functions by macros.

Am really no a big fan of using macros for that kind of things, but
meh... C solution to do that with functions (using callbacks) is
even worse. :(

Fix Object > Animation > Bake Action

Fix T61536: can't snap vertex to another vertex in edit mode using curves

Previously, the curve self snapping would only snap to points that were
earlier in the curve structure. This was because of a simple coding
snafu of using break when meaning to use continue.

Fix T61520: Incorrect assignment of layers to compositor nodes in 2.8 when reading 2.79 .blend

Reviewers: brecht

Maniphest Tasks: T61520

Differential Revision: https://developer.blender.org/D4352

Fix T56665: Assert when selecting object

Selecting object w/ a different mode missed refreshing the screen
areas current tool.

UI: add symmetrize to armature menu

Was lost on menu reorganization,
minor tweaks to make it match the context menu.

Fix T61472: Hide Unselected fails w/ no selection

Also skip mesh recalculation when no hide/reveal is performed.

Fix T61353: Crash converting a curve to a mesh

This was caused by curves pointing to each other
creating a cyclic dependency.

While the dependency graph detects this, generating a mesh for render
recursively generates data which cashes in this case.

Add in a check to detect cyclic links.

Note, this bug exists in 2.7x too - but only crashes on render
since 2.7x didn't use 'for_render' when converting data.

DRW: de-duplicate vertex & weight paint engines

These were almost exact duplicates, use one engine for drawing both
kinds of vertex color.

DRW: use light wire for weight paint mode

Black wire can be hard to see against dark blue,
especially when shading is enabled.

Use light grey, matches 2.7x.

DRW: Increase weight paint wire depth bias

By default wire would z-fight against the surface.
Increase the bias, also don't adjust the 'w' component
since it causes bias that depends on the view direction.

Cleanup: vertex painting variable use

Assign to local variables when setting up passes,
avoids mix-up between similarly named struct members.

Fix vertex/weight paint showing edge selection

When vertex/face selection are disabled - show all wire
ignoring selection & hidden state.

Fix T61360: Weight paint tools ignore face select

Face selection was added in weight paint mode since 2.7x,
however tools hadn't been updated.

Fix T61497: Old keymap causes error on startup

When a keymap has an error loading, don't make it active
since it will be partially loaded and not usable.