Blender Git Loki

GPencil: Change Cursor Panel texts

GPencil: Add cursor color for Tint

GPencil: Ensure storage is initializated for renders

This failed in material preview generation.

Merge branch 'greasepencil-object' into greasepencil-refactor

Merge branch 'master' into greasepencil-object

GPencil: Hide Panels depending of Tool

GPenciL: Fixes in UI

- Fix Sculpt stroke panel.
- Fis Subtract color in Cursor Panel.
- Move Boundary to Advanced panel

GPencil: Remove duplicate custom cursor

Merge branch 'greasepencil-object' into greasepencil-refactor

GPencil: Add missing options to Image menu after merge master

Merge branch 'greasepencil-object' into greasepencil-refactor

Conflicts:
release/scripts/startup/bl_ui/properties_grease_pencil_common.py
release/scripts/startup/bl_ui/space_view3d_toolbar.py

Merge branch 'master' into greasepencil-object

Conflicts:
release/scripts/startup/bl_ui/properties_data_modifier.py
release/scripts/startup/bl_ui/properties_grease_pencil_common.py
release/scripts/startup/bl_ui/properties_paint_common.py
release/scripts/startup/bl_ui/space_view3d.py
release/scripts/startup/bl_ui/space_view3d_toolbar.py

GPencil: Fix more damaged panels

GPencil: Refactor: Fix mask blending

Cleanup: GPencil: Simplify drawing logic.

GPencil: Refactor: Fix mask system not working in some scenes

GPencil: Add missing Vertex Panel

GPencil: More UI fixes after merge

Still more issues pending.

GPencil: First step to fix damaged UI by Brush panel refactor done in master

The patch done in master was done before the Sculpt and Weight brushes were real brushes and also before the Vertex Paint mode was implemented. As result of that, the merge of master has broken almost all panels of brushes and all Vertex Paint mode.

This commit only fix part of the damages.

GPencil: Refactor: Implement Opacity Masking

This is better than previous implementation but has a higher cost.

We render masked layer to a RGBA16F buffer and we then mask the revealage
and the color in a 2 pass blending.

This could maybe optimized a bit to reduce to 1 blending on recent hardware
but the cost will still be way higher than the stencil method.

On the plus side, there is less code change than with the stencil.