Sculpt Vertex Colors: Initial implementation

Sculpt Vertex Colors is a painting system that runs inside sculpt mode, reusing all its tools and optimizations. This provides much better performance, easier to maintain code and more advanced features (new brush engine, filters, symmetry options, masks and face sets compatibility...). This is also the initial step for future features like vertex painting in Multires and brushes that can sculpt and paint at the same time.

This commit includes:
  - SCULPT_UNDO_COLOR for undo support in sculpt mode
  - SCULPT_UPDATE_COLOR and PBVH flags and rendering
  - Sculpt Color API functions
  - Sculpt capability for sculpt tools (only enabled in the Paint Brush for now)
  - Rendering support in workbench (default to Sculpt Vertex Colors except in Vertex Paint)
  - Conversion operator between MPropCol (Sculpt Vertex Colors) and MLoopCol (Vertex Paint)
  - Remesher reprojection in the Voxel Remehser
  - Paint Brush and Smear Brush with color smoothing in alt-smooth mode
  - Parameters for the new brush engine (density, opacity, flow, wet paint mixing, tip scale) implemented in Sculpt Vertex Colors
  - Color Filter
  - Color picker (uses S shortcut, replaces smooth)
  - Color selector in the top bar

Reviewed By: brecht

Maniphest Tasks: T72866

Differential Revision: https://developer.blender.org/D5975

1 files changed, 9 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_mesh.h b/source/blender/editors/include/ED_mesh.h
index 17e2043a7a8..9c49d991182 100644
--- a/source/blender/editors/include/ED_mesh.h
+++ b/source/blender/editors/include/ED_mesh.h
@@ -426,6 +426,15 @@ bool ED_mesh_color_remove_index(struct Mesh *me, const int n);
 bool ED_mesh_color_remove_active(struct Mesh *me);
 bool ED_mesh_color_remove_named(struct Mesh *me, const char *name);
 
+bool ED_mesh_sculpt_color_ensure(struct Mesh *me, const char *name);
+int ED_mesh_sculpt_color_add(struct Mesh *me,
+                             const char *name,
+                             const bool active_set,
+                             const bool do_init);
+bool ED_mesh_sculpt_color_remove_index(struct Mesh *me, const int n);
+bool ED_mesh_sculpt_color_remove_active(struct Mesh *me);
+bool ED_mesh_sculpt_color_remove_named(struct Mesh *me, const char *name);
+
 void ED_mesh_report_mirror(struct wmOperator *op, int totmirr, int totfail);
 void ED_mesh_report_mirror_ex(struct wmOperator *op, int totmirr, int totfail, char selectmode);