Fix T75329: Missing show_face_sets checks for Multires

These values were hardcoded before Face Sets were enabled for Multires,
so enable the show_face_sets checks now.

Reviewed By: jbakker

Maniphest Tasks: T75329

Differential Revision: https://developer.blender.org/D7444

3 files changed, 5 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/paint.c b/source/blender/blenkernel/intern/paint.c
index d4408291712..4bbbae7081d 100644
--- a/source/blender/blenkernel/intern/paint.c
+++ b/source/blender/blenkernel/intern/paint.c
@@ -1854,7 +1854,7 @@ static PBVH *build_pbvh_from_ccg(Object *ob, SubdivCCG *subdiv_ccg)
                        subdiv_ccg->grid_flag_mats,
                        subdiv_ccg->grid_hidden);
   pbvh_show_mask_set(pbvh, ob->sculpt->show_mask);
-  pbvh_show_face_sets_set(pbvh, false);
+  pbvh_show_face_sets_set(pbvh, ob->sculpt->show_face_sets);
   return pbvh;
 }
 
diff --git a/source/blender/blenkernel/intern/pbvh.c b/source/blender/blenkernel/intern/pbvh.c
index 977e70745a3..33aa20fa1e4 100644
--- a/source/blender/blenkernel/intern/pbvh.c
+++ b/source/blender/blenkernel/intern/pbvh.c
@@ -2958,7 +2958,7 @@ bool pbvh_has_face_sets(PBVH *bvh)
 {
   switch (bvh->type) {
     case PBVH_GRIDS:
-      return false;
+      return (bvh->pdata && CustomData_get_layer(bvh->pdata, CD_SCULPT_FACE_SETS));
     case PBVH_FACES:
       return (bvh->pdata && CustomData_get_layer(bvh->pdata, CD_SCULPT_FACE_SETS));
     case PBVH_BMESH:
diff --git a/source/blender/gpu/intern/gpu_buffers.c b/source/blender/gpu/intern/gpu_buffers.c
index 8496bcac693..8b562413ce8 100644
--- a/source/blender/gpu/intern/gpu_buffers.c
+++ b/source/blender/gpu/intern/gpu_buffers.c
@@ -691,6 +691,8 @@ void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
 {
   const bool show_mask = (update_flags & GPU_PBVH_BUFFERS_SHOW_MASK) != 0;
   const bool show_vcol = (update_flags & GPU_PBVH_BUFFERS_SHOW_VCOL) != 0;
+  const bool show_face_sets = sculpt_face_sets &&
+                              (update_flags & GPU_PBVH_BUFFERS_SHOW_SCULPT_FACE_SETS) != 0;
   bool empty_mask = true;
   bool default_face_set = true;
 
@@ -738,7 +740,7 @@ void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
 
       uchar face_set_color[4] = {UCHAR_MAX, UCHAR_MAX, UCHAR_MAX, UCHAR_MAX};
 
-      if (subdiv_ccg && sculpt_face_sets) {
+      if (show_face_sets && subdiv_ccg && sculpt_face_sets) {
         const int face_index = BKE_subdiv_cgg_grid_to_face_index(subdiv_ccg, grid_index);
 
         const int fset = abs(sculpt_face_sets[face_index]);