Blender Git Loki

Merge branch 'master' into functions

LANPR: make format

Merge branch 'master' into soc-2019-npr

LANPR: Object modifier for line selection (not functional yet)

UI: add back Data-block 'show_hidden_files_datablocks' name

This name didn't indicate items in the ID data-block browser will be hidden too.

Reverts part of:
ad707115d5bcb61a2773a5b4c697d6f66c469105

Cleanup: comment, RNA spelling

Fail without crashing if no runtime is found

For now simply do nothing. Plan is to work on proper error handling and
reporting later.

UI: remove redundant RNA_TYPE property in the key-map editor

Cleanup: comment spelling

Fix compile errors and warnings on certain configs

Addresses:
* Compile error on Linux
* Compile error with WITH_OPENXR disabled
* Unused parameter warnings

Add remesh panel to the topbar

This panel has the same options as the mesh properties remesh panel.

Fix missing return value... how did this work even?

Looking at the code this should've failed miserably. No idea how this
could still work fine... Maybe return vars used same stack location?

Fix crash with mesh filters and EEVEE

Add front faces only option to the mask lasso tool

Merge branch 'master' into sculpt-mode-features

Merge branch 'master' into soc-2019-openxr

Draw OpenGL framebuffer upside down in DirectX windows

DirectX is Y coordinates top to bottom, while OpenGL is the opposite.
For the final window manager on-screen drawing, draw to a texture first
and draw that upside down if needed.

Support drawing the VR view into a DirectX window!

Phew! That a fight. But this is also a pretty important feature as it
allows interfacing with Windows Mixed Reality OpenXR runtime and the
HMDs supported by it.

Important remaining issue: The rendered viewport is upside down :) That
is of course because DirectX has the opposite vertical direction than
OpenGL.

When creating a DirectX window, we also create an OpenGL offscreen
context to use for all drawing. Just before swapping framebuffers, the
DirectX window blits the framebuffer of the offscreen context into its
swapchain. This requires the WGL_NV_DX_interop and WGL_NV_DX_interop2
extensions.

For testing/dev purposes, also adds:
* Version of the offscreen to onscreen blitting that's OpenGL only. So
it blits the default framebuffer of the offscreen context into the one
of the onscreen context.
This is disabled by a #define.
* Code to draw a colored triangle using DirectX, also for testing.
Requires the D3DCompiler.lib to be available at compile time. This is
also disabled using a #define.

Revert new grease pencil cursor for paint modes

This reverts commit a412f49e7580a and 873c756e5dd73. The change was only
supposed to affect grease pencil, but also changed the cursor for sculpt mode,
where it's not clearly visible. Since this has not been quickly resolved I'm
reverting the commit.

Ref D5036.

Cleanup: simplify GHOST cursor API, no functional changes