Sculpt: PBVH Draw Support for EEVEE

This patch adds support for PBVH drawing in EEVEE.

Notes:
  # PBVH_FACES only.  For Multires we'll need an API to get/cache attributes.  DynTopo support will be merged in later with sculpt-dev's DynTopo implementation.
  # Supports vertex color and UV attributes only; other types can be added fairly easily though.
  # Workbench only sends the active vertex color and UV layers to the GPU.
  # Added a new draw engine API method, DRW_cdlayer_attr_aliases_add.  Please review.
  # The vertex format object is now stored in the pbvh.

Reviewed By: Clément Foucault & Brecht Van Lommel & Jeroen Bakker
Differential Revision: https://developer.blender.org/D13897
Ref D13897

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/draw/intern/draw_cache_impl_mesh.cc b/source/blender/draw/intern/draw_cache_impl_mesh.cc
index ec71250b63b..1b45f3f88dd 100644
--- a/source/blender/draw/intern/draw_cache_impl_mesh.cc
+++ b/source/blender/draw/intern/draw_cache_impl_mesh.cc
@@ -744,7 +744,8 @@ static bool mesh_batch_cache_valid(Object *object, Mesh *me)
   }
 
   if (object->sculpt && object->sculpt->pbvh) {
-    if (cache->pbvh_is_drawing != BKE_pbvh_is_drawing(object->sculpt->pbvh)) {
+    if (cache->pbvh_is_drawing != BKE_pbvh_is_drawing(object->sculpt->pbvh) ||
+        BKE_pbvh_draw_cache_invalid(object->sculpt->pbvh)) {
       return false;
     }