Blender Git Loki

GPencil: Fix unreported missing stroke color for 1st popover material

Fix T59065: Blender default keyset is deletable by user!

Previously, you could delete presets that were part of the blender
default install. Now we check if the preset file resides in the bundled
file paths. If so, prevent deletion of the preset.

Reviewed By: Campbell

Differential Revision: https://developer.blender.org/D4522

Merge branch 'blender-v2.81-release'

Fix image paint showing project-paint settings

Also make projpaint a keyword-only argument to avoid copy-paste errors
like this re-occurring in the future.

Fix T71212: Drivers using scene.frame_current don't refresh on playback

Need to make such drivers explicitly dependent on time.

Depsgraph: Cleanup, use anonymous nsamespace

Jeeps overall line lengths with function definition shorter.

OpenSubdiv: Initial implementation of batched evaluation

The idea is to give multiple coordinates to evaluator and evaluate them
all at once, avoiding any possible overhead.

OpenSubdiv: Make internal evaluator aware of batched evaluation

Allows to pass multiple patch coordinates for evaluation.

OpenSubdiv: Use more generic access to patch coordinates

Saves another unnecessary temporary data copy during evaluation.

OpenSubdiv: Cleanup, remove old compatibility code

Consider that all builders have face-varying evaluation now.

OpenSubdiv: Cleanup, remove unused class

OpenSubdiv: Avoid unnecessary memory copies

Make evaluator itself to write directly to the output buffer.

Brings unmeasurable speedup and makes it possible to simplify
some buffer class logic.

OpenSubdiv: Use smaller buffer sizes and strides

We currently don't support interleaved varying data, so can make
some buffer smaller.

OpenSubdiv: Cleanup, remove unused PatchBuffer class

OpenSubdiv: Cleanup, remove unused evaluator member

OpenSubdiv: Cleanup, remove unused static methods

Merge branch 'blender-v2.81-release'

GNUmakefile: avoid using group/owner for source_archive

Thanks to @JRottm for pointing out this issue.

Merge branch 'blender-v2.81-release'

GNUmakefile: use tar.xz instead of tar.gz

Also rename "make tgz" to "make source_archive" as it wasn't clear
this only archived the source, not binaries.

D6153 by @JRottm with minor edits