Blender Git Loki

GPencil: Fix compiler warnings

GPencil: Refactor: Fix display bug of strokes endpoints

GPencil: Refactor: New linked mask system

The new system is more flexible and a bit simpler from the code side.

Each layer has a mask layer slot. If filled with a correct layer name,
the mask layer will be rendered again in a separate buffer. This buffer
will then be used in the blend pass to modulate the opacity of the layer.

This approach is not 100% equivalent to the standard layering in most 2D
applications if using varying alpha on a mask applied to multiple layers.
However this technique does support any ordering arrangement of the masks.

The layers used as mask can now still render normaly.

Merge branch 'greasepencil-object' into greasepencil-refactor

Merge branch 'master' into greasepencil-object

GPencil: Rename collision to boundbox

The initial use of the variables was collision, but now are used for more things, so it's better put a more general name.

GPencil: Fix merge errors

Also, the modiifer reuse precalculated bounding box data.

Merge branch 'greasepencil-object' into greasepencil-refactor

Conflicts:
source/blender/blenloader/intern/readfile.c

Merge branch 'master' into greasepencil-object

GPencil: Remove unused drawing code for interpolate operator

GPencil: Remove old drawing from Interpolate operator

Now the drawing is done using the normal drawing engine and not the old drawing code.

Cleanup: Interpolate operator

Replace loops and remove old unused code

Merge branch 'greasepencil-object' into greasepencil-refactor

Merge branch 'master' into greasepencil-object

Merge branch 'greasepencil-object' into greasepencil-refactor

GPencil: Add missing flag after merge

The vertex paint mode was not in master.

Merge branch 'master' into greasepencil-object

GPencil: Initial implementation of the layer mask relationship

Now, there is a new parameter to define the mask used by layer.

Still pending to remove old `use_mask` property in C and python (not removed yet to keep running the masking UI).

Merge branch 'greasepencil-object' into greasepencil-refactor

Merge branch 'master' into greasepencil-object