bugfix [#22859] Multi-user images cant be made into single user in texure panel.

turns out this isnt exactly a bug since support was never written for this but may as well support it.
now rna/py can do image.copy() too.

source/blender/blenkernel/BKE_image.h

@@ -159,7 +159,7 @@ void BKE_image_memorypack(struct Image *ima);
 void BKE_image_print_memlist(void);
 
 /* empty image block, of similar type and filename */
-struct Image *BKE_image_copy(struct Image *ima);
+struct Image *copy_image(struct Image *ima);
 
 /* merge source into dest, and free source */
 void BKE_image_merge(struct Image *dest, struct Image *source);

source/blender/blenkernel/intern/deform.c

@@ -471,6 +471,7 @@ void flip_side_name (char *name, const char *from_name, int strip_number)
 #undef IS_SEPARATOR
 
 	sprintf (name, "%s%s%s%s", prefix, replace, suffix, number);
+	printf("'%s' --> '%s'\n", from_name, name);
 }
 
 float defvert_find_weight(const struct MDeformVert *dvert, int group_num)

source/blender/blenkernel/intern/image.c

@@ -287,17 +287,25 @@ static void image_assign_ibuf(Image *ima, ImBuf *ibuf, int index, int frame)
 }
 
 /* empty image block, of similar type and filename */
-Image *BKE_image_copy(Image *ima)
+Image *copy_image(Image *ima)
 {
-	Image *new= image_alloc(ima->id.name+2, ima->source, ima->type);
+	Image *nima= image_alloc(ima->id.name+2, ima->source, ima->type);
 
-	BLI_strncpy(new->name, ima->name, sizeof(ima->name));
+	BLI_strncpy(nima->name, ima->name, sizeof(ima->name));
+
+	nima->flag= ima->flag;
+	nima->tpageflag= ima->tpageflag;
 	
-	new->gen_x= ima->gen_x;
-	new->gen_y= ima->gen_y;
-	new->gen_type= ima->gen_type;
-	
-	return new;
+	nima->gen_x= ima->gen_x;
+	nima->gen_y= ima->gen_y;
+	nima->gen_type= ima->gen_type;
+
+	nima->animspeed= ima->animspeed;
+
+	nima->aspx= ima->aspx;
+	nima->aspy= ima->aspy;
+
+	return nima;
 }
 
 void BKE_image_merge(Image *dest, Image *source)

source/blender/blenkernel/intern/library.c

@@ -262,7 +262,8 @@ int id_copy(ID *id, ID **newid, int test)
 			if(!test) *newid= (ID*)copy_texture((Tex*)id);
 			return 1;
 		case ID_IM:
-			return 0; /* not implemented */
+			if(!test) *newid= (ID*)copy_image((Image*)id);
+			return 1;
 		case ID_WV:
 			return 0; /* deprecated */
 		case ID_LT:

source/blender/blenkernel/intern/node.c

@@ -2565,7 +2565,7 @@ bNodeTree *ntreeLocalize(bNodeTree *ntree)
 		if(ELEM(node->type, CMP_NODE_VIEWER, CMP_NODE_SPLITVIEWER)) {
 			if(node->id) {
 				if(node->flag & NODE_DO_OUTPUT)
-					node->new_node->id= (ID *)BKE_image_copy((Image *)node->id);
+					node->new_node->id= (ID *)copy_image((Image *)node->id);
 				else
 					node->new_node->id= NULL;
 			}

source/blender/makesdna/DNA_image_types.h

@@ -105,7 +105,7 @@ typedef struct Image {
 
 /* **************** IMAGE ********************* */
 
-/* flag */
+/* Image.flag */
 #define IMA_FIELDS		1
 #define IMA_STD_FIELD	2
 #define IMA_DO_PREMUL	4
@@ -115,7 +115,7 @@ typedef struct Image {
 #define IMA_DEPRECATED	64
 #define IMA_OLD_PREMUL	128
 
-/* tpageflag */
+/* Image.tpageflag */
 #define IMA_TILES			1
 #define IMA_TWINANIM		2
 #define IMA_COLCYCLE		4	/* Depreciated */