Fix T95697: GPU subdivision ignores custom normals

Similarly to the CPU subdivision, we interpolate custom loop normals
from the coarse mesh, and this for the final normals.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/draw/intern/draw_subdivision.h b/source/blender/draw/intern/draw_subdivision.h
index 65e845c21a4..78313441a70 100644
--- a/source/blender/draw/intern/draw_subdivision.h
+++ b/source/blender/draw/intern/draw_subdivision.h
@@ -67,6 +67,7 @@ typedef struct DRWSubdivCache {
   struct Subdiv *subdiv;
   bool optimal_display;
   bool do_limit_normals;
+  bool use_custom_loop_normals;
 
   /* Coordinates used to evaluate patches for UVs, positions, and normals. */
   struct GPUVertBuf *patch_coords;
@@ -186,6 +187,10 @@ void draw_subdiv_finalize_normals(const DRWSubdivCache *cache,
                                   struct GPUVertBuf *subdiv_loop_subdiv_vert_index,
                                   struct GPUVertBuf *pos_nor);
 
+void draw_subdiv_finalize_custom_normals(const DRWSubdivCache *cache,
+                                         GPUVertBuf *src_custom_normals,
+                                         GPUVertBuf *pos_nor);
+
 void draw_subdiv_extract_pos_nor(const DRWSubdivCache *cache,
                                  struct GPUVertBuf *pos_nor,
                                  bool do_limit_normals);