Sculpt: Refactor draw manager sculpt drawing mechanism

Workbench/Eevee now displays multiple multi-materials correctly.

Iterate over pbvh nodes when doing object iteration. This makes the
rendering process more streamlined and allow for using different materials.

This change will make possible to:
- Add culling pass of each pbvh leaf node. (speedup if zoomed on a small
area)
- Reduce number of lead node iteration.
- Reduce code complexity

1 files changed, 11 insertions, 8 deletions

diff --git a/source/blender/draw/intern/DRW_render.h b/source/blender/draw/intern/DRW_render.h
index 134fb5d99f8..363cf67623a 100644
--- a/source/blender/draw/intern/DRW_render.h
+++ b/source/blender/draw/intern/DRW_render.h
@@ -440,6 +440,17 @@ void DRW_shgroup_call_object_add_with_callback(DRWShadingGroup *shgroup,
                                                struct Material *ma,
                                                DRWCallVisibilityFn *callback,
                                                void *user_data);
+
+void DRW_shgroup_call_sculpt_add(DRWShadingGroup *shading_group,
+                                 Object *object,
+                                 bool use_wire,
+                                 bool use_mask,
+                                 bool use_vert_color);
+void DRW_shgroup_call_sculpt_with_materials_add(DRWShadingGroup **shgroups,
+                                                Material **materials,
+                                                Object *ob,
+                                                bool use_vcol);
+
 /* Used for drawing a batch with instancing without instance attributes. */
 void DRW_shgroup_call_instances_add(DRWShadingGroup *shgroup,
                                     struct GPUBatch *geom,
@@ -449,14 +460,6 @@ void DRW_shgroup_call_object_instances_add(DRWShadingGroup *shgroup,
                                            struct GPUBatch *geom,
                                            struct Object *ob,
                                            uint *count);
-void DRW_shgroup_call_sculpt_add(DRWShadingGroup *shgroup, struct Object *ob, float (*obmat)[4]);
-void DRW_shgroup_call_sculpt_wires_add(DRWShadingGroup *shgroup,
-                                       struct Object *ob,
-                                       float (*obmat)[4]);
-void DRW_shgroup_call_generate_add(DRWShadingGroup *shgroup,
-                                   DRWCallGenerateFn *geometry_fn,
-                                   void *user_data,
-                                   float (*obmat)[4]);
 void DRW_shgroup_call_dynamic_add_array(DRWShadingGroup *shgroup,
                                         const void *attr[],
                                         uint attr_len);