From 2cf21604c9130c56021525ed5af3f1fa59dcb19a Mon Sep 17 00:00:00 2001
From: Joseph Eagar <joeedh@gmail.com>
Date: Mon, 3 Oct 2022 16:12:41 -0700
Subject: Sculpt: implement Reveal All for PBVH_BMESH

---
 source/blender/editors/sculpt_paint/sculpt.c       | 70 ++++++++++++++++++++--
 .../editors/sculpt_paint/sculpt_face_set.cc        | 49 +++++++++++++--
 2 files changed, 110 insertions(+), 9 deletions(-)

(limited to 'source/blender')

diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index c9d29b3ceb5..89998f19476 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -419,8 +419,15 @@ void SCULPT_face_visibility_all_invert(SculptSession *ss)
         ss->hide_poly[i] = !ss->hide_poly[i];
       }
       break;
-    case PBVH_BMESH:
+    case PBVH_BMESH: {
+      BMIter iter;
+      BMFace *f;
+
+      BM_ITER_MESH (f, &iter, ss->bm, BM_FACES_OF_MESH) {
+        BM_elem_flag_toggle(f, BM_ELEM_HIDDEN);
+      }
       break;
+    }
   }
 }
 
@@ -432,8 +439,15 @@ void SCULPT_face_visibility_all_set(SculptSession *ss, bool visible)
       BLI_assert(ss->hide_poly != NULL);
       memset(ss->hide_poly, !visible, sizeof(bool) * ss->totfaces);
       break;
-    case PBVH_BMESH:
+    case PBVH_BMESH: {
+      BMIter iter;
+      BMFace *f;
+
+      BM_ITER_MESH (f, &iter, ss->bm, BM_FACES_OF_MESH) {
+        BM_elem_flag_set(f, BM_ELEM_HIDDEN, !visible);
+      }
       break;
+    }
   }
 }
 
@@ -475,8 +489,30 @@ bool SCULPT_vertex_all_faces_visible_get(const SculptSession *ss, PBVHVertRef ve
       }
       return true;
     }
-    case PBVH_BMESH:
+    case PBVH_BMESH: {
+      BMVert *v = (BMVert *)vertex.i;
+      BMEdge *e = v->e;
+
+      if (!e) {
+        return true;
+      }
+
+      do {
+        BMLoop *l = e->l;
+
+        if (!l) {
+          continue;
+        }
+
+        do {
+          if (BM_elem_flag_test(l->f, BM_ELEM_HIDDEN)) {
+            return false;
+          }
+        } while ((l = l->radial_next) != e->l);
+      } while ((e = BM_DISK_EDGE_NEXT(e, v)) != v->e);
+
       return true;
+    }
     case PBVH_GRIDS: {
       if (!ss->hide_poly) {
         return true;
@@ -603,8 +639,34 @@ void SCULPT_visibility_sync_all_from_faces(Object *ob)
       BKE_sculpt_sync_face_visibility_to_grids(mesh, ss->subdiv_ccg);
       break;
     }
-    case PBVH_BMESH:
+    case PBVH_BMESH: {
+      BMIter iter;
+      BMVert *v;
+      BMFace *f;
+
+      /* Hide all verts and edges attached to faces.*/
+      BM_ITER_MESH (f, &iter, ss->bm, BM_FACES_OF_MESH) {
+        BMLoop *l = f->l_first;
+        do {
+          BM_elem_flag_enable(l->v, BM_ELEM_HIDDEN);
+          BM_elem_flag_enable(l->e, BM_ELEM_HIDDEN);
+        } while ((l = l->next) != f->l_first);
+      }
+
+      /* Unhide verts and edges attached to visible faces. */
+      BM_ITER_MESH (f, &iter, ss->bm, BM_FACES_OF_MESH) {
+        if (!(BM_elem_flag_test(f, BM_ELEM_HIDDEN))) {
+          continue;
+        }
+
+        BMLoop *l = f->l_first;
+        do {
+          BM_elem_flag_disable(l->v, BM_ELEM_HIDDEN);
+          BM_elem_flag_disable(l->e, BM_ELEM_HIDDEN);
+        } while ((l = l->next) != f->l_first);
+      }
       break;
+    }
   }
 }
 
diff --git a/source/blender/editors/sculpt_paint/sculpt_face_set.cc b/source/blender/editors/sculpt_paint/sculpt_face_set.cc
index 79c1304eee5..34717888966 100644
--- a/source/blender/editors/sculpt_paint/sculpt_face_set.cc
+++ b/source/blender/editors/sculpt_paint/sculpt_face_set.cc
@@ -833,8 +833,51 @@ static int sculpt_face_sets_change_visibility_exec(bContext *C, wmOperator *op)
   SculptSession *ss = ob->sculpt;
   Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
 
-  /* Dyntopo not supported. */
+  Mesh *mesh = BKE_object_get_original_mesh(ob);
+
+  BKE_sculpt_update_object_for_edit(depsgraph, ob, true, true, false);
+
+  /* Dyntopo not supported except for SCULPT_FACE_SET_VISIBILITY_SHOW_ALL. */
   if (BKE_pbvh_type(ss->pbvh) == PBVH_BMESH) {
+    if (ss->pbvh && ss->bm &&
+        RNA_enum_get(op->ptr, "mode") == SCULPT_FACE_SET_VISIBILITY_SHOW_ALL) {
+      PBVHNode **nodes;
+      int totnode;
+
+      BKE_pbvh_search_gather(ss->pbvh, nullptr, nullptr, &nodes, &totnode);
+
+      if (!totnode) {
+        return OPERATOR_CANCELLED;
+      }
+
+      SCULPT_undo_push_begin(ob, op);
+      SCULPT_undo_push_node(ob, nodes[0], SCULPT_UNDO_COORDS);
+
+      for (int i = 0; i < totnode; i++) {
+        BKE_pbvh_node_mark_update_visibility(nodes[i]);
+      }
+
+      BMIter iter;
+      BMFace *f;
+      BMVert *v;
+      const int cd_mask = CustomData_get_offset(&ss->bm->vdata, CD_PAINT_MASK);
+
+      BM_ITER_MESH (v, &iter, ss->bm, BM_VERTS_OF_MESH) {
+        BM_log_vert_before_modified(ss->bm_log, v, cd_mask);
+      }
+      BM_ITER_MESH (f, &iter, ss->bm, BM_FACES_OF_MESH) {
+        BM_log_face_modified(ss->bm_log, f);
+      }
+
+      SCULPT_face_visibility_all_set(ss, true);
+      SCULPT_visibility_sync_all_from_faces(ob);
+
+      SCULPT_undo_push_end(ob);
+      MEM_SAFE_FREE(nodes);
+
+      return OPERATOR_FINISHED;
+    }
+
     return OPERATOR_CANCELLED;
   }
 
@@ -842,10 +885,6 @@ static int sculpt_face_sets_change_visibility_exec(bContext *C, wmOperator *op)
     return OPERATOR_CANCELLED;
   }
 
-  Mesh *mesh = BKE_object_get_original_mesh(ob);
-
-  BKE_sculpt_update_object_for_edit(depsgraph, ob, true, true, false);
-
   const int tot_vert = SCULPT_vertex_count_get(ss);
   const int mode = RNA_enum_get(op->ptr, "mode");
   const int active_face_set = SCULPT_active_face_set_get(ss);
-- 
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