Blender Git Loki

Add UDIM support to the Cycles Image node

SVM only for now, OSL will come later.

Use flexible spacing for timeline editor

UI: Flexible spacing

This support layout.flexible_spacing() to be used by headers as a way to
dynamically separate the ui buttons.

Right now no UI file is changed, though we can use this right away in the
timeline, and shortly after in the viewport header (moving settings from
the topbar to it).

depth behave weird, fixed multisample on snake result.

Fix segment fault in weight paint for 2.8 old files

This code would be moved to versioning code after merge, but now it's required to manage files created with previous versions of 2.8 (not 2.7x)

Remove mode switching custom code

This code is not required because the mode switching is not done with keys 1..9

Rename IMA_SRC_UDIM to IMA_SRC_TILED

Support UDIMs in Image Space operators

added depth-alpha line style control (pre multiply)

Merge branch 'blender2.8' into greasepencil-object

Add: depth controlled line width.

Added multisampe support functions in DRW. transform_to_screen later.

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

Conflicts:
source/tools

Implement basic UDIM grid drawing

Automatically find and load all UDIM tiles even if only the 1001 tile is selected

Add first parts of UDIM support in the core image code

Internally, UDIMs are handled very similar to sequences - they consist of a list
of files (containing a sequential number in their name) that all belong to one
Image datablock. This means that existing code like the IBuf cache can be reused.

The current drawing and opening code are just a minimal implementation to test
the core code, they'll be improved of course.

Move multisample textures to texture list

If the texture is in e_data is shared for all viewports and fails.

Cleanup GP multisample code

Updates to volume kernel tiling function.

1. OpenCL and CUDA support (mostly untested).
2. Change name of offsets to grid_info since it needs to keep track of
other info as well.
3. Several speed and memory optimizations.

Merge branch 'blender2.8' into greasepencil-object