Blender Git Loki

encapsulate the need_update member of every manager

create temporary instances component in nodes modifier

initial instances component

initial rendering of geometry component

ImBuf: support detecting the file format from in-memory images

Add `IMB_ispic_type_from_memory` so we can detect the file format
of in-memory images.

This removes `is_a_filepath` callback and uses a magic check for
photo-shop files that's compatible with OIIO.

Even though OIIO doesn't support packed images, we can still use the
file magic for detecting the format.

This change allows D9500 (a fix for unpacking images),
to be implemented without a significant performance penalty,
although the actual performance cost would depend heavily on the
blend file.

Reviewed By: dfelinto, sergey

Ref D9517

update point cloud modiifer interface

Merge branch 'blender-v2.91-release'

Fix T82540: Smart UV project ignores seams

Functionality was lost in the Python to C conversion from
850234c1b10a828678f1b91001f2731db807f7e2

Merge branch 'blender-v2.91-release'

Fix T82555: Crash using copied object from Python

Also clear `gpd_eval` as this wasn't being copied either.

Added an "Exponent" slider to Color Boundary brush.

Merge branch 'blender-v2.91-release'

Fix T65585: Knife fails when cursor away from the object

Zeroed mouse coordinates were being used making projection fail.

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

LineArt: reduce chaining_image_threshold to 0.001 to prevent errorous chaining.

LineArt: Reduce geometry threshold default to 0.01

Tweaked value for smoothing in vcol boundary tool (a slight amount of
smoothing is applied to prevent normal discontiuties from perfectly
colinear triangles).

Also reverted some CLANG compiling stuff.

Cleanup: remove hard coded file format check in IMB_ispic_type

This is already being checked in the 'is_a' callback.

Cleanup: clang-format

Cleanup: clang-tidy suppress warnings for PyTypeObject.tp_print

Clang-tidy behavior changes from Python 3.7 to 3.8+ so it's simplest
to suppress the warning in this instance.