Blender Git Loki

Fix image paint undo memory leak

Fix T60660: Texture paint undo removes image

Undo System: add Main argument to encode/decode

Needed since we don't always have the context,
and avoids adding G_MAIN into undo callbacks.

Fix T61028: Crash when entering wireframe view

Cleanup: add trailing commas

Improve clang-format output.

Fix T60378: All armatures reset positions on linked collection when ctrl+z used on anything.

Issue actually exists since ages, probably 2.7x update system forced all
armature proxies to be fully refreshed after an undo?

In any case, proxy_from should only be reset for 'local' proxies (i.e.
directly linked datablocks), not for linked proxies...

Merge branch 'blender2.7'

Cleanup: use better names for depsgraph driver relations.

Both the driven properties and driver targets were called targets, now make
a distinction.

GP: Remove DEG_get_original_id() from draw manager

Only keep this function when drawing to avoid COW overhead that reduce performance.

After some changes I did some time ago, the use of original ID was not required and this only added depsgraph overhead and problems.

This change solves the problems with updates in render mode.

Related to T57484 and the changes requested by Sergey.

Fix T61017: node_shader_utils did not handle diffuse_color correctly

Fix default material using zero alpha

Fix (unreported) memleak when copying object and its material with GP settings.

Like... seriously?

Fix T60957: ASSERT when reloading double-linked file.

Kind of funny to see that this has been missing presumably since the
first version of library linking in Blender, and only gets noticed now.
Then again, that was not really a critical issue, iirc write code
ensures all libraries directly used get properly written, even if flags
are incorrect.

Cleanup: use proper bitflag operators.

Cleanup: Unused function argument

Cycles: improved rounding of sample chunks for resumable renders

When using `--cycles-resumable-num-chunks N` to render a subset of the
samples, having N close to the total number of samples causes rounding
issues.

For example, a file configured for 250 samples and 150 chunks should
have 1.6666 sample per chunk. The old code rounded this to 2 samples per
chunk, which would result in too many samples being rendered. When
rendering a single chunk this doesn't matter much, but when larger chunk
ranges are rendered with `--cycles-resumable-start-chunk` and
`--cycles-resumable-end-chunk` the rounding errors start to add up.

By multiplying with the number of chunks to render first, and only round
to integers after that, this issue is solved. In the above example,
rendering 3 chunks will correctly render 5 samples rather than 6.

When the requested number of chunks is larger than the number of samples
there will be duplicate samples (that is, sample N appearing both in
chunk M and M+1). In this case a warning is printed to stderr.

This is needed for T50977 Progressive render: use non-uniform sample
chunks.

Reviewed by: sergey

Differential Revision: https://developer.blender.org/D4282

Fix T60974: Dyntopo crash on undo after object deleted

Add the ability for undo steps to request memfile undo step added after
them, useful for mode switching, where we need the data to exist for
undo to enter the mode.

Versioning: add renaming utility function

Avoids accidents creating duplicate names.

Also ensure screens are sorted on rename.

Cleanup: line length

Partial fix for T60982: Editable anim settings in linked action.

This is only partially working, because some bAnimListElem items do not
have any ID pointer set (for wome mysterious reason...), notably the
'group' ones.

Will re-assign to @aligorith for that, this code is rather complicated
and hard to follow (with all those macros ;) ).