Fix T98886: PBVH_GRIDS ignores face smooth flag on first gpu build

3 files changed, 12 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/pbvh.c b/source/blender/blenkernel/intern/pbvh.c
index 640b532e417..d82f2bbf99d 100644
--- a/source/blender/blenkernel/intern/pbvh.c
+++ b/source/blender/blenkernel/intern/pbvh.c
@@ -1301,9 +1301,14 @@ static void pbvh_update_draw_buffer_cb(void *__restrict userdata,
 
   if (node->flag & PBVH_RebuildDrawBuffers) {
     switch (pbvh->type) {
-      case PBVH_GRIDS:
-        node->draw_buffers = GPU_pbvh_grid_buffers_build(node->totprim, pbvh->grid_hidden);
+      case PBVH_GRIDS: {
+        bool smooth = node->totprim > 0 ?
+                          pbvh->grid_flag_mats[node->prim_indices[0]].flag & ME_SMOOTH :
+                          false;
+
+        node->draw_buffers = GPU_pbvh_grid_buffers_build(node->totprim, pbvh->grid_hidden, smooth);
         break;
+      }
       case PBVH_FACES:
         node->draw_buffers = GPU_pbvh_mesh_buffers_build(
             pbvh->mpoly,
diff --git a/source/blender/gpu/GPU_buffers.h b/source/blender/gpu/GPU_buffers.h
index 1af0080baef..4c682a5e378 100644
--- a/source/blender/gpu/GPU_buffers.h
+++ b/source/blender/gpu/GPU_buffers.h
@@ -53,7 +53,9 @@ GPU_PBVH_Buffers *GPU_pbvh_mesh_buffers_build(const struct MPoly *mpoly,
 /**
  * Threaded: do not call any functions that use OpenGL calls!
  */
-GPU_PBVH_Buffers *GPU_pbvh_grid_buffers_build(int totgrid, unsigned int **grid_hidden);
+GPU_PBVH_Buffers *GPU_pbvh_grid_buffers_build(int totgrid,
+                                              unsigned int **grid_hidden,
+                                              bool smooth);
 
 /**
  * Threaded: do not call any functions that use OpenGL calls!
diff --git a/source/blender/gpu/intern/gpu_buffers.c b/source/blender/gpu/intern/gpu_buffers.c
index fed998bb33e..11c80fb0326 100644
--- a/source/blender/gpu/intern/gpu_buffers.c
+++ b/source/blender/gpu/intern/gpu_buffers.c
@@ -783,13 +783,14 @@ void GPU_pbvh_grid_buffers_update(GPU_PBVH_Buffers *buffers,
   buffers->show_overlay = !empty_mask || !default_face_set;
 }
 
-GPU_PBVH_Buffers *GPU_pbvh_grid_buffers_build(int totgrid, BLI_bitmap **grid_hidden)
+GPU_PBVH_Buffers *GPU_pbvh_grid_buffers_build(int totgrid, BLI_bitmap **grid_hidden, bool smooth)
 {
   GPU_PBVH_Buffers *buffers;
 
   buffers = MEM_callocN(sizeof(GPU_PBVH_Buffers), "GPU_Buffers");
   buffers->grid_hidden = grid_hidden;
   buffers->totgrid = totgrid;
+  buffers->smooth = smooth;
 
   buffers->show_overlay = false;