Blender Git Loki

Fix T66256: Context overrides crash when operators change context

Using context overrides in Python caused problems for any operator that
changed the context and require these changes to be read back.

CTX_wm_area_set() for e.g. would set the struct member but future
calls to CTX_wm_area() would still return the value defined by Python
callers context overrides.

This also resolves a mismatch between polling and calling operators
from Python, where poll would override the Python context where calling
only overrode the context when a new context was passed in.

Cleanup: use doxy sections for blender.c

Cleanup: use static assert to disable access to preferences

Prefer this over an unknown identifier as it gives a useful error.

Cleanup: Use enum instead of defines for panel runtime flag

Discovered an unused panel runtime flag as well, which this commit
removes.

UI: only draw a single header in the header region

While this isn't an issue with the default configuration it's possible
to register extra header types for a single region.

In this case the first header-type to successfully poll is drawn
without drawing other header types.

This issue was raised by T60195.

Cleanup: don't register dope-sheet header types

These are only used to hold static methods, there is no reason to
register them.

Cleanup: Comment formatting in interface_panel.c

Also cleaned up some grammar and wording issues, and switched a case
in an if statement to remove a double negative.

Fix T63651: ImagePreviewCollection.new,load don't work as documented

Update doc-strings, add note for why this decision was made.

Cleanup: warning (missing-braces)

Fix: Text object custom profile bevel not written to file

The CurveProfile struct was only being written to the file for regular
curve objects. Caused by an incorrect merge of master before committing.

Merge branch 'master' into soc-2021-testing-frameworks

Merge branch 'master' into tmp-vulkan

# Conflicts:
# CMakeLists.txt

VK: Avoid asserts in debug builds.

GHOST: X11: Enable debug context for vulkan in offscreen contexts

GHOST: Vulkan: Rework support for MSVC

This removes designated initializer because not supported by MSVC for our
current C++ version.

Fixes some other compile errors and add usage of the `ContextVK` context in
the Win32 backend.

Fix T79523 Paint Cursor: Wide line not supported on OSX

This replace the use of GPU_line_width by the specialized
GPU_SHADER_3D_POLYLINE_UNIFORM_COLOR shader.

Fix T79315 Normals Overlays broken with hidden geometry

Was caused by non-initialized variables before a return inside
the vertex shader.

Fix: Property search crashes searching enums with separators

Cleanup: silence [-Wmissing-braces] warning.

Introduced in {rBd6525e8d133b787655bdb2c2fcef218591a457c3}

Compiler: Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
```
source/blender/draw/engines/image/image_shader.c:46:13: warning:
suggest braces around initialization of subobject [-Wmissing-braces]
} e_data = {0}; /* Engine data */
^
{}
1 warning generated.
```

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D8873

Curves: Add custom profile bevel support

This adds support for the same custom bevel profile widget used in
the bevel tool and modifier to the geometry generation for curves.

This is expecially useful for text and 2D curves with extrusion, as
it works much better than a weld & bevel modifier combination.
It can also be useful for adding quick detail to pipe-like objects.

The curve holds the CurveProfile struct and a new "Bevel Mode"
property decides which type of bevel to build, round, object, or
custom profile.

Although curves can already use another curve to make the bevel
geometry, this is a quicker way, and it also defines the profile of
just one corner of the bevel, so it isn't redundant. It's also nice
to have the same custom profile functionality wherever there is bevel.

Differential Revision: https://developer.blender.org/D8402