bugfix [#23068] Image editor: Update Automatically not updating the compositor.

[#23637] Replacing an image used in the compositor crashes
       [#23343] changes in images doesn't update compositor image nodes

source/blender/blenkernel/BKE_node.h

@@ -192,7 +192,7 @@ int				nodeSetActiveID(struct bNodeTree *ntree, short idtype, struct ID *id);
 void			nodeClearActiveID(struct bNodeTree *ntree, short idtype);
 
 void			NodeTagChanged(struct bNodeTree *ntree, struct bNode *node);
-void			NodeTagIDChanged(struct bNodeTree *ntree, struct ID *id);
+int				NodeTagIDChanged(struct bNodeTree *ntree, struct ID *id);
 
 /* ************** Groups ****************** */
 

source/blender/blenkernel/intern/image.c

@@ -69,6 +69,7 @@
 #include "BKE_main.h"
 #include "BKE_packedFile.h"
 #include "BKE_scene.h"
+#include "BKE_node.h"
 
 //XXX #include "BIF_editseq.h"
 
@@ -1447,6 +1448,17 @@ void BKE_image_signal(Image *ima, ImageUser *iuser, int signal)
 		}
 		break;
 	}
+	
+	/* dont use notifiers because they are not 100% sure to succseed
+	 * this also makes sure all scenes are accounted for. */
+	{
+		Scene *scene;
+		for(scene= G.main->scene.first; scene; scene= scene->id.next) {
+			if(scene->nodetree) {
+				NodeTagIDChanged(scene->nodetree, &ima->id);
+			}
+		}
+	}
 }
 
 /* if layer or pass changes, we need an index for the imbufs list */

source/blender/blenkernel/intern/node.c

@@ -1787,18 +1787,25 @@ void NodeTagChanged(bNodeTree *ntree, bNode *node)
 	}
 }
 
-void NodeTagIDChanged(bNodeTree *ntree, ID *id)
+int NodeTagIDChanged(bNodeTree *ntree, ID *id)
 {
+	int change = FALSE;
+
 	if(id==NULL)
-		return;
+		return change;
 	
 	if(ntree->type==NTREE_COMPOSIT) {
 		bNode *node;
 		
-		for(node= ntree->nodes.first; node; node= node->next)
-			if(node->id==id)
+		for(node= ntree->nodes.first; node; node= node->next) {
+			if(node->id==id) {
+				change= TRUE;
 				NodeTagChanged(ntree, node);
+			}
+		}
 	}
+	
+	return change;
 }
 
 

source/blender/editors/sculpt_paint/paint_image.c

@@ -4534,29 +4534,8 @@ static void paint_redraw(bContext *C, ImagePaintState *s, int final)
 		if(s->image)
 			GPU_free_image(s->image);
 
+		/* compositor listener deals with updating */
 		WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, s->image);
-
-		// XXX node update
-#if 0
-		if(!s->sima && s->image) {
-			/* after paint, tag Image or RenderResult nodes changed */
-			if(s->scene->nodetree) {
-				imagepaint_composite_tags(s->scene->nodetree, image, &s->sima->iuser);
-			}
-			/* signal composite (hurmf, need an allqueue?) */
-			if(s->sima->lock) {
-				ScrArea *sa;
-				for(sa=s->screen->areabase.first; sa; sa= sa->next) {
-					if(sa->spacetype==SPACE_NODE) {
-						if(((SpaceNode *)sa->spacedata.first)->treetype==NTREE_COMPOSIT) {
-							addqueue(sa->win, UI_BUT_EVENT, B_NODE_TREE_EXEC);
-							break;
-						}
-					}
-				}
-			}
-		}		
-#endif
 	}
 	else {
 		if(!s->sima || !s->sima->lock)

source/blender/editors/space_node/node_edit.c

@@ -1919,33 +1919,6 @@ void NODE_OT_read_fullsamplelayers(wmOperatorType *ot)
 }
 
 
-/* ************************* */
-
-void imagepaint_composite_tags(bNodeTree *ntree, Image *image, ImageUser *iuser)
-{
-	bNode *node;
-	
-	if(ntree==NULL)
-		return;
-	
-	/* search for renderresults */
-	if(image->type==IMA_TYPE_R_RESULT) {
-		for(node= ntree->nodes.first; node; node= node->next) {
-			if(node->type==CMP_NODE_R_LAYERS && node->id==NULL) {
-				/* imageuser comes from ImageWin, so indexes are offset 1 */
-				if(node->custom1==iuser->layer-1)
-					NodeTagChanged(ntree, node);
-			}
-		}
-	}
-	else {
-		for(node= ntree->nodes.first; node; node= node->next) {
-			if(node->id== &image->id)
-				NodeTagChanged(ntree, node);
-		}
-	}
-}
-
 /* ****************** Make Group operator ******************* */
 
 static int node_group_make_exec(bContext *C, wmOperator *op)

source/blender/editors/space_node/space_node.c

@@ -42,6 +42,7 @@
 
 #include "BKE_context.h"
 #include "BKE_screen.h"
+#include "BKE_node.h"
 
 #include "ED_render.h"
 #include "ED_screen.h"
@@ -158,7 +159,10 @@ static void node_init(struct wmWindowManager *wm, ScrArea *sa)
 
 static void node_area_listener(ScrArea *sa, wmNotifier *wmn)
 {
-	
+	/* note, ED_area_tag_refresh will re-execute compositor */
+	/* XXX, should edit some to check for the nodeTree type, especially  NC_NODE|NA_EDITED which refreshes all types */
+	SpaceNode *snode= sa->spacedata.first;
+
 	/* preview renders */
 	switch(wmn->category) {
 		case NC_SCENE:
@@ -200,6 +204,20 @@ static void node_area_listener(ScrArea *sa, wmNotifier *wmn)
 			if (wmn->action == NA_EDITED)
 				ED_area_tag_refresh(sa);
 			break;
+
+		case NC_IMAGE:
+			if (wmn->action == NA_EDITED) {
+				if(snode->treetype==NTREE_COMPOSIT) {
+					Scene *scene= wmn->window->screen->scene;
+					
+					/* note that NodeTagIDChanged is alredy called by BKE_image_signal() on all
+					 * scenes so really this is just to know if the images is used in the compo else
+					 * painting on images could become very slow when the compositor is open. */
+					if(NodeTagIDChanged(scene->nodetree, wmn->reference))
+						ED_area_tag_refresh(sa);
+				}
+			}
+			break;
 	}
 }