Multires: Initial Face Sets support

This implements the Sculpt Mode API functions needed for Face Sets and
visibility management for PBVH_GRIDS. No major changes were needed in
the operators and the sculpt mode code. This implementation stores the
face sets in the base mesh, so faces created in higher subdivision
levels can't be modified individually. Also, we are not checking for
multiple face sets per vertex (that can be added in the future), so
relax tools don't work yet. The rest of the features (paint, undo,
visibility operators..) work as expected.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7168

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_buffers.h b/source/blender/gpu/GPU_buffers.h
index 9d91fd79137..b02f6ed09b3 100644
--- a/source/blender/gpu/GPU_buffers.h
+++ b/source/blender/gpu/GPU_buffers.h
@@ -95,10 +95,14 @@ void GPU_pbvh_bmesh_buffers_update(GPU_PBVH_Buffers *buffers,
                                    const int update_flags);
 
 void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
+                                  struct SubdivCCG *subdiv_ccg,
                                   struct CCGElem **grids,
                                   const struct DMFlagMat *grid_flag_mats,
                                   int *grid_indices,
                                   int totgrid,
+                                  const int *sculpt_face_sets,
+                                  const int face_sets_color_seed,
+                                  const int face_sets_color_default,
                                   const struct CCGKey *key,
                                   const int update_flags);