[Bf-blender-cvs] [38af785dba0] master: Sculpt: Fix crash in dyntopo draw

[Joseph Eagar]

Commit: 38af785dba0989871b5c6c258c7e748a462e2f9a
Author: Joseph Eagar
Date:   Wed Oct 5 12:37:35 2022 -0700
Branches: master
https://developer.blender.org/rB38af785dba0989871b5c6c258c7e748a462e2f9a

Sculpt: Fix crash in dyntopo draw

===================================================================

M	source/blender/draw/intern/draw_pbvh.cc

===================================================================

diff --git a/source/blender/draw/intern/draw_pbvh.cc b/source/blender/draw/intern/draw_pbvh.cc
index 4170285e1d9..6b807222079 100644
--- a/source/blender/draw/intern/draw_pbvh.cc
+++ b/source/blender/draw/intern/draw_pbvh.cc
@@ -860,10 +860,30 @@ struct PBVHBatches {
         const char *prefix = "a";
 
         if (ELEM(type, CD_PROP_COLOR, CD_PROP_BYTE_COLOR)) {
+          Mesh query_mesh;
+
+          /* Check if we have args->me; if not use get_cdata to build something we
+           * can query for color attributes.
+           */
+          if (args->me) {
+            memcpy(static_cast<void *>(&query_mesh),
+                   static_cast<const void *>(args->me),
+                   sizeof(Mesh));
+          }
+          else {
+            BKE_id_attribute_copy_domains_temp(ID_ME,
+                                               get_cdata(ATTR_DOMAIN_POINT, args),
+                                               nullptr,
+                                               get_cdata(ATTR_DOMAIN_CORNER, args),
+                                               nullptr,
+                                               nullptr,
+                                               &query_mesh.id);
+          }
+
           prefix = "c";
 
-          CustomDataLayer *render = BKE_id_attributes_render_color_get(&args->me->id);
-          CustomDataLayer *active = BKE_id_attributes_active_color_get(&args->me->id);
+          CustomDataLayer *render = BKE_id_attributes_render_color_get(&query_mesh.id);
+          CustomDataLayer *active = BKE_id_attributes_active_color_get(&query_mesh.id);
 
           is_render = render && layer && STREQ(render->name, layer->name);
           is_active = active && layer && STREQ(active->name, layer->name);