Blender Git Loki

Cleanup

* Reduce number of extra/excess layout.row() elements with a single item
* Simplify logic (redundant check)

Try to fix pixsize in render mode

Still the pixsize is not working becaus ethe values are not valid.

WIP: More work on render

Now get a result, but still the stroke is missing and replace any other render image.

WIP: Initial steps to define render to image functions

This commit is to put in place all components of the render, but still not working and only enabled in debug mode.

Calculate zdepth relative to camera plane if rv3d is null

If the viewport is not available, RegionView3D is null, so to calculate the z-depth must use the camera plane.

This is a preliminary step to integrate render (F12)

Disable grease pencil paper in render mode

This is a preliminary step to integrate render (F12)

Merge branch 'blender2.8' into greasepencil-object

Cleanup: Reduce number of passes using pointers

Instead to define different passes for mixing final result, now reuse the passes and use pointers to replace input textures.

Cleanup style

Fix: Don't show "Brush Appearance" panel in Edit Mode

GP UI: WIP Attempt to cleanup some weird alignment/nesting/spacing issues

It's unclear to my why all these fields seemed to be individually wrapped
in both a row and column layout, but with "align=True" enabled, causing
the widgets to be oddly separated in the UI

GP Eraser Panel: Expose button to activate eraser

It's currently impossible to activate the eraser in the 3D view otherwise
if you're using a mouse (unlikely for most serious 2D artists, but possible
for non-sculpting modellers/animators) or if your tablet doesn't have an
eraser end (IIRC some non-Wacom styluses may have this limitation)

Also noted that we should also expose the hard/soft mode, and/or strength
settings here too (as opposed to having these hardcoded and/or mapped to
hardcoded modifier keys only)

GP UI - 2D/3D Split: Move all 3D toolbar only panel code to space_view3d_toolbar.py

* All toolbar panels that are only used in the 3D view have now been
moved out of properties_gpencil_common.py, as they are *only* used
in that editor.

* Sculpt, Edit, and Eraser panel definiitions remain in the common file
for now, as it's still possible for these to be used in other editors
(at least in theory - there may be some new limitations I haven't found yet)

GP UI - 2D/3D Split: Split out the "Create Shapes" and "DrawingToolsPanel" into separate classes

The 3D/GP Object only used part of the old "DrawingToolsPanel" to
draw the "Shapes" panel, going so far as to use an empty label +
custom draw header function to dynamically change the label.

This commit properly fixes the code here by separating out the code for
the two use cases:
* The GP object case is now handled by a dedicated "GreasePencilCreateShapesPanel"
that only does the "Shapes" stuff
* I've reverted the other case back to the master version, as this is more
suitable for use by all the other 2D editors

Clean Boundary Fill: Clarify Labels/Tooltips

GP "Strokes Edit" Panel: Consolidate a few items in preparation for restoration of 2D GPencil (WIP)

The groupings here are not final, and can still be adjusted/scrapped.

1) Used "operator_menu_enum"'s in place of listing out all the modes of
certain operators with multiple modes. This brings those operators more
in line with the other ops here (and in other parts).

2) Fixed the code to not show 3D only operators if this panel gets used
anywhere else.

Cleanup: Style fixes

Cleanup: Move modal operator draw callbacks out of ED_gpencil.h

Turns out that these were only actually used from within the gpencil
module (i.e. they were defined in drawgpencil.c, and called from the
gpencil_<opname>.c files), so it's not even necessary to export these
function prototypes in the ED_gpencil.h header.

Cleanup: Remove color picker defines from headers

There's no need for these defines to be in any headers, as this operator
is entirely self-contained in its own file now.

Merge branch 'blender2.8' into greasepencil-object