From e4cc1c3f2c3e5a85fbf4f7f2757b09544dd556ee Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Tue, 26 Apr 2011 07:17:21 +0000
Subject: fix [#27178] Material links lost when making mesh data local - making
 local object data - Curve/Mesh/MBall lost references to linked materials. -
 joining a linked mesh object into a local one lost the link.

As well as these reported bugs, checked all local functions for consistency/correctness and found other cases which would also fail.
- making local metaball didn't ensure unique ID name.
- make_local_armature() was missing check for object users - main body of code would never run.
- local particles didn't set the dupli-group or textures to extern.

checked all local functions for consistency/correctness.
---
 source/blender/blenkernel/intern/mesh.c | 61 ++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 27 deletions(-)

(limited to 'source/blender/blenkernel/intern/mesh.c')

diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 532e96f3031..45a60b842a7 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -247,7 +247,7 @@ Mesh *copy_mesh(Mesh *me)
 	return men;
 }
 
-void make_local_tface(Mesh *me)
+static void make_local_tface(Main *bmain, Mesh *me)
 {
 	MTFace *tface;
 	Image *ima;
@@ -264,7 +264,7 @@ void make_local_tface(Mesh *me)
 					if(ima->id.lib) {
 						ima->id.lib= NULL;
 						ima->id.flag= LIB_LOCAL;
-						new_id(NULL, (ID *)ima, NULL);
+						new_id(&bmain->image, (ID *)ima, NULL);
 					}
 				}
 			}
@@ -272,58 +272,65 @@ void make_local_tface(Mesh *me)
 	}
 }
 
+static void expand_local_mesh(Main *bmain, Mesh *me)
+{
+	id_lib_extern((ID *)me->texcomesh);
+
+	if(me->mtface) {
+		/* why is this an exception? - should not really make local when extern'ing - campbell */
+		make_local_tface(bmain, me);
+	}
+
+	if(me->mat) {
+		extern_local_matarar(me->mat, me->totcol);
+	}
+}
+
 void make_local_mesh(Mesh *me)
 {
 	Main *bmain= G.main;
 	Object *ob;
-	Mesh *men;
 	int local=0, lib=0;
 
 	/* - only lib users: do nothing
-		* - only local users: set flag
-		* - mixed: make copy
-		*/
-	
+	 * - only local users: set flag
+	 * - mixed: make copy
+	 */
+
 	if(me->id.lib==NULL) return;
 	if(me->id.us==1) {
 		me->id.lib= NULL;
 		me->id.flag= LIB_LOCAL;
-		new_id(NULL, (ID *)me, NULL);
-		
-		if(me->mtface) make_local_tface(me);
-		
+
+		new_id(&bmain->mesh, (ID *)me, NULL);
+		expand_local_mesh(bmain, me);
 		return;
 	}
-	
-	ob= bmain->object.first;
-	while(ob) {
-		if( me==get_mesh(ob) ) {
+
+	for(ob= bmain->object.first; ob && ELEM(0, lib, local); ob= ob->id.next) {
+		if(me == ob->data) {
 			if(ob->id.lib) lib= 1;
 			else local= 1;
 		}
-		ob= ob->id.next;
 	}
-	
+
 	if(local && lib==0) {
 		me->id.lib= NULL;
 		me->id.flag= LIB_LOCAL;
-		new_id(NULL, (ID *)me, NULL);
-		
-		if(me->mtface) make_local_tface(me);
-		
+
+		new_id(&bmain->mesh, (ID *)me, NULL);
+		expand_local_mesh(bmain, me);
 	}
 	else if(local && lib) {
-		men= copy_mesh(me);
+		Mesh *men= copy_mesh(me);
 		men->id.us= 0;
-		
-		ob= bmain->object.first;
-		while(ob) {
-			if( me==get_mesh(ob) ) {				
+
+		for(ob= bmain->object.first; ob; ob= ob->id.next) {
+			if(me == ob->data) {
 				if(ob->id.lib==NULL) {
 					set_mesh(ob, men);
 				}
 			}
-			ob= ob->id.next;
 		}
 	}
 }
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