2.5

Added WM Jobs manager
- WM can manage threaded jobs for you; just provide a couple
  of components to get it work:
  - customdata, free callback for it
  - timer step, notifier code
  - start callback, update callback
- Once started, each job runs an own timer, and will for
  every time step check necessary updates, or close the
  job when ready. 
- No drawing happens in jobs, that's for notifiers!
- Every job stores an owner pointer, and based on this owner
  it will prevent multiple jobs to enter the stack. 
  Instead it will re-use a running job, signal it to stop
  and allow caller to re-initialize it even.
- Check new wm_jobs.c for more explanation. Jobs API is still
  under construction. 
  Fun: BLI_addtail(&wm->jobs, steve); :)

Put Node shader previews back using wmJobs
- Preview calculating is now fully threaded (1 thread still)
- Thanks to new event system + notifiers, you can see 
  previews update even while dragging sliders!
- Currently it only starts when you change a node setting.

Warning: the thread render shares Node data, so don't delete
nodes while it renders! This topic is on the todo to make safe.

Also:
- bug in region initialize (do_versions) showed channel list in
  node editor wrong.
- flagged the channel list 'hidden' now, it was really in the
  way! This is for later to work on anyway. 
- recoded Render API callbacks so it gets handlers passed on, 
  no globals to use anymore, remember?
- previewrender code gets now so much nicer! Will remove a lot
  of stuff from code soon.

12 files changed, 179 insertions, 167 deletions

diff --git a/source/blender/render/extern/include/RE_pipeline.h b/source/blender/render/extern/include/RE_pipeline.h
index 97ef371af76..538372d5558 100644
--- a/source/blender/render/extern/include/RE_pipeline.h
+++ b/source/blender/render/extern/include/RE_pipeline.h
@@ -200,14 +200,13 @@ void RE_make_stars(struct Render *re, struct Scene *scenev3d, void (*initfunc)(v
 				   void (*vertexfunc)(float*),  void (*termfunc)(void));
 
 /* display and event callbacks */
-void RE_display_init_cb	(struct Render *re, void (*f)(RenderResult *rr));
-void RE_display_clear_cb(struct Render *re, void (*f)(RenderResult *rr));
-void RE_display_draw_cb	(struct Render *re, void (*f)(RenderResult *rr, volatile struct rcti *rect));
-void RE_stats_draw_cb	(struct Render *re, void (*f)(RenderStats *rs));
-void RE_timecursor_cb	(struct Render *re, void (*f)(int));
-void RE_test_break_cb	(struct Render *re, int (*f)(void));
-void RE_test_return_cb	(struct Render *re, int (*f)(void));
-void RE_error_cb		(struct Render *re, void (*f)(char *str));
+void RE_display_init_cb	(struct Render *re, void *handle, void (*f)(void *handle, RenderResult *rr));
+void RE_display_clear_cb(struct Render *re, void *handle, void (*f)(void *handle, RenderResult *rr));
+void RE_display_draw_cb	(struct Render *re, void *handle, void (*f)(void *handle, RenderResult *rr, volatile struct rcti *rect));
+void RE_stats_draw_cb	(struct Render *re, void *handle, void (*f)(void *handle, RenderStats *rs));
+void RE_timecursor_cb	(struct Render *re, void *handle, void (*f)(void *handle, int));
+void RE_test_break_cb	(struct Render *re, void *handle, int (*f)(void *handle));
+void RE_error_cb		(struct Render *re, void *handle, void (*f)(void *handle, char *str));
 
 /* should move to kernel once... still unsure on how/where */
 float RE_filter_value(int type, float x);
diff --git a/source/blender/render/intern/include/render_types.h b/source/blender/render/intern/include/render_types.h
index 34553208574..66722ea983f 100644
--- a/source/blender/render/intern/include/render_types.h
+++ b/source/blender/render/intern/include/render_types.h
@@ -208,16 +208,23 @@ struct Render
 	struct MemArena *memArena;
 	
 	/* callbacks */
-	void (*display_init)(RenderResult *rr);
-	void (*display_clear)(RenderResult *rr);
-	void (*display_draw)(RenderResult *rr, volatile rcti *rect);
-	
-	void (*stats_draw)(RenderStats *ri);
-	void (*timecursor)(int i);
-	
-	int (*test_break)(void);
-	int (*test_return)(void);
-	void (*error)(char *str);
+	void (*display_init)(void *handle, RenderResult *rr);
+	void *dih;
+	void (*display_clear)(void *handle, RenderResult *rr);
+	void *dch;
+	void (*display_draw)(void *handle, RenderResult *rr, volatile rcti *rect);
+	void *ddh;
+	
+	void (*stats_draw)(void *handle, RenderStats *ri);
+	void *sdh;
+	void (*timecursor)(void *handle, int i);
+	void *tch;
+	
+	int (*test_break)(void *handle);
+	void *tbh;
+	
+	void (*error)(void *handle, char *str);
+	void *erh;
 	
 	RenderStats i;
 };
diff --git a/source/blender/render/intern/source/convertblender.c b/source/blender/render/intern/source/convertblender.c
index 6afc0ac472f..62954711344 100644
--- a/source/blender/render/intern/source/convertblender.c
+++ b/source/blender/render/intern/source/convertblender.c
@@ -2021,7 +2021,7 @@ static int render_new_particle_system(Render *re, ObjectRen *obr, ParticleSystem
 		if(orco1==0)
 			orco+=3;
 
-		if(re->test_break())
+		if(re->test_break(re->tbh))
 			break;
 	}
 
@@ -4357,7 +4357,7 @@ static void init_render_object(Render *re, Object *ob, Object *par, DupliObject
 		re->i.totstrand= re->totstrand;
 		re->i.tothalo= re->tothalo;
 		re->i.totlamp= re->totlamp;
-		re->stats_draw(&re->i);
+		re->stats_draw(re->sdh, &re->i);
 	}
 
 	ob->flag |= OB_DONE;
@@ -4727,7 +4727,7 @@ static void database_init_objects(Render *re, unsigned int renderlay, int nolamp
 					else
 						init_render_object(re, obd, ob, dob, timeoffset, vectorlay);
 					
-					if(re->test_break()) break;
+					if(re->test_break(re->tbh)) break;
 				}
 				free_object_duplilist(lb);
 
@@ -4738,7 +4738,7 @@ static void database_init_objects(Render *re, unsigned int renderlay, int nolamp
 				init_render_object(re, ob, NULL, 0, timeoffset, vectorlay);
 		}
 
-		if(re->test_break()) break;
+		if(re->test_break(re->tbh)) break;
 	}
 
 	/* objects in groups with OB_RENDER_DUPLI set still need to be created,
@@ -4755,7 +4755,7 @@ static void database_init_objects(Render *re, unsigned int renderlay, int nolamp
 		}
 	}
 
-	if(!re->test_break())
+	if(!re->test_break(re->tbh))
 		RE_makeRenderInstances(re);
 }
 
@@ -4817,7 +4817,7 @@ void RE_Database_FromScene(Render *re, Scene *scene, int use_camera_view)
 	/* MAKE RENDER DATA */
 	database_init_objects(re, lay, 0, 0, 0, 0);
 
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		int tothalo;
 
 		set_material_lightgroups(re);
@@ -4832,17 +4832,17 @@ void RE_Database_FromScene(Render *re, Scene *scene, int use_camera_view)
 		re->i.totstrand= re->totstrand;
 		re->i.tothalo= re->tothalo;
 		re->i.totlamp= re->totlamp;
-		re->stats_draw(&re->i);
+		re->stats_draw(re->sdh, &re->i);
 		
 		/* don't sort stars */
 		tothalo= re->tothalo;
-		if(!re->test_break())
+		if(!re->test_break(re->tbh))
 			if(re->wrld.mode & WO_STARS)
 				RE_make_stars(re, NULL, NULL, NULL, NULL);
 		sort_halos(re, tothalo);
 		
 		re->i.infostr= "Creating Shadowbuffers";
-		re->stats_draw(&re->i);
+		re->stats_draw(re->sdh, &re->i);
 
 		/* SHADOW BUFFER */
 		threaded_makeshadowbufs(re);
@@ -4851,43 +4851,43 @@ void RE_Database_FromScene(Render *re, Scene *scene, int use_camera_view)
 		/* although radio mode could be useful at some point, later */
 		if (re->r.renderer==R_INTERN) {
 			/* RADIO (uses no R anymore) */
-			if(!re->test_break())
+			if(!re->test_break(re->tbh))
 				if(re->r.mode & R_RADIO) do_radio_render(re);
 			
 			/* raytree */
-			if(!re->test_break()) {
+			if(!re->test_break(re->tbh)) {
 				if(re->r.mode & R_RAYTRACE) {
 					makeraytree(re);
 				}
 			}
 			/* ENVIRONMENT MAPS */
-			if(!re->test_break())
+			if(!re->test_break(re->tbh))
 				make_envmaps(re);
 		}
 		
-		if(!re->test_break())
+		if(!re->test_break(re->tbh))
 			project_renderdata(re, projectverto, re->r.mode & R_PANORAMA, 0, 1);
 		
 		/* Occlusion */
-		if((re->wrld.mode & WO_AMB_OCC) && !re->test_break())
+		if((re->wrld.mode & WO_AMB_OCC) && !re->test_break(re->tbh))
 			if(re->wrld.ao_gather_method == WO_AOGATHER_APPROX)
 				if(re->r.renderer==R_INTERN)
 					if(re->r.mode & R_SHADOW)
 						make_occ_tree(re);
 
 		/* SSS */
-		if((re->r.mode & R_SSS) && !re->test_break())
+		if((re->r.mode & R_SSS) && !re->test_break(re->tbh))
 			if(re->r.renderer==R_INTERN)
 				make_sss_tree(re);
 	}
 	
-	if(re->test_break())
+	if(re->test_break(re->tbh))
 		RE_Database_Free(re);
 	else
 		re->i.convertdone= 1;
 	
 	re->i.infostr= NULL;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 }
 
 /* exported call to recalculate hoco for vertices, when winmat changed */
@@ -4940,7 +4940,7 @@ static void database_fromscene_vectors(Render *re, Scene *scene, int timeoffset)
 	/* MAKE RENDER DATA */
 	database_init_objects(re, lay, 0, 0, 0, timeoffset);
 	
-	if(!re->test_break())
+	if(!re->test_break(re->tbh))
 		project_renderdata(re, projectverto, re->r.mode & R_PANORAMA, 0, 1);
 
 	/* do this in end, particles for example need cfra */
@@ -5313,7 +5313,7 @@ void RE_Database_FromScene_Vectors(Render *re, Scene *sce)
 	RE_Database_Free(re);
 	re->strandsurface= strandsurface;
 	
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		/* creates entire dbase */
 		re->i.infostr= "Calculating next frame vectors";
 		
@@ -5328,10 +5328,10 @@ void RE_Database_FromScene_Vectors(Render *re, Scene *sce)
 	RE_Database_Free(re);
 	re->strandsurface= strandsurface;
 	
-	if(!re->test_break())
+	if(!re->test_break(re->tbh))
 		RE_Database_FromScene(re, sce, 1);
 	
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		for(step= 0; step<2; step++) {
 			
 			if(step)
@@ -5400,7 +5400,7 @@ void RE_Database_FromScene_Vectors(Render *re, Scene *sce)
 	}
 	
 	re->i.infostr= NULL;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 }
 
 
@@ -5499,12 +5499,12 @@ void RE_Database_Baking(Render *re, Scene *scene, int type, Object *actob)
 			threaded_makeshadowbufs(re);
 
 	/* raytree */
-	if(!re->test_break())
+	if(!re->test_break(re->tbh))
 		if(re->r.mode & R_RAYTRACE)
 			makeraytree(re);
 	
 	/* occlusion */
-	if((re->wrld.mode & WO_AMB_OCC) && !re->test_break())
+	if((re->wrld.mode & WO_AMB_OCC) && !re->test_break(re->tbh))
 		if(re->wrld.ao_gather_method == WO_AOGATHER_APPROX)
 			if(re->r.mode & R_SHADOW)
 				make_occ_tree(re);
diff --git a/source/blender/render/intern/source/envmap.c b/source/blender/render/intern/source/envmap.c
index 5cf03272b9f..de09d8f51e0 100644
--- a/source/blender/render/intern/source/envmap.c
+++ b/source/blender/render/intern/source/envmap.c
@@ -408,7 +408,7 @@ static void render_envmap(Render *re, EnvMap *env)
 		if(env->type==ENV_PLANE && part!=1)
 			continue;
 		
-		re->display_clear(envre->result);
+		re->display_clear(re->dch, envre->result);
 		
 		MTC_Mat4CpyMat4(tmat, orthmat);
 		envmap_transmatrix(tmat, part);
@@ -429,7 +429,7 @@ static void render_envmap(Render *re, EnvMap *env)
 		env_hideobject(envre, env->object);
 		env_set_imats(envre);
 				
-		if(re->test_break()==0) {
+		if(re->test_break(re->tbh)==0) {
 			RE_TileProcessor(envre, 0, 0);
 		}
 		
@@ -437,7 +437,7 @@ static void render_envmap(Render *re, EnvMap *env)
 		env_showobjects(envre);
 		env_rotate_scene(envre, tmat, 0);
 
-		if(re->test_break()==0) {
+		if(re->test_break(re->tbh)==0) {
 			RenderLayer *rl= envre->result->layers.first;
 			int y;
 			char *alpha;
@@ -455,11 +455,11 @@ static void render_envmap(Render *re, EnvMap *env)
 			env->cube[part]= ibuf;
 		}
 		
-		if(re->test_break()) break;
+		if(re->test_break(re->tbh)) break;
 
 	}
 	
-	if(re->test_break()) BKE_free_envmapdata(env);
+	if(re->test_break(re->tbh)) BKE_free_envmapdata(env);
 	else {
 		if(envre->r.mode & R_OSA) env->ok= ENV_OSA;
 		else env->ok= ENV_NORMAL;
@@ -486,7 +486,7 @@ void make_envmaps(Render *re)
 	re->r.mode &= ~R_RAYTRACE;
 
 	re->i.infostr= "Creating Environment maps";
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	
 	/* 5 = hardcoded max recursion level */
 	while(depth<5) {
@@ -547,8 +547,8 @@ void make_envmaps(Render *re)
 	}
 
 	if(do_init) {
-		re->display_init(re->result);
-		re->display_clear(re->result);
+		re->display_init(re->dih, re->result);
+		re->display_clear(re->dch, re->result);
 		// re->flag |= R_REDRAW_PRV;
 	}	
 	// restore
diff --git a/source/blender/render/intern/source/occlusion.c b/source/blender/render/intern/source/occlusion.c
index d2d2cf3fb77..5a2a58ca919 100644
--- a/source/blender/render/intern/source/occlusion.c
+++ b/source/blender/render/intern/source/occlusion.c
@@ -1292,11 +1292,11 @@ static void occ_compute_passes(Render *re, OcclusionTree *tree, int totpass)
 			VECADDFAC(co, co, n, 1e-8f);
 
 			occ_lookup(tree, 0, &tree->face[i], co, n, &occ[i], NULL);
-			if(re->test_break())
+			if(re->test_break(re->tbh))
 				break;
 		}
 
-		if(re->test_break())
+		if(re->test_break(re->tbh))
 			break;
 
 		for(i=0; i<tree->totface; i++) {
@@ -1546,7 +1546,7 @@ void make_occ_tree(Render *re)
 	R= *re;
 
 	re->i.infostr= "Occlusion preprocessing";
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	
 	re->occlusiontree= occ_tree_build(re);
 	
@@ -1738,7 +1738,7 @@ void cache_occ_samples(Render *re, RenderPart *pa, ShadeSample *ssamp)
 				sample->filled= 1;
 			}
 
-			if(re->test_break())
+			if(re->test_break(re->tbh))
 				break;
 		}
 	}
diff --git a/source/blender/render/intern/source/pipeline.c b/source/blender/render/intern/source/pipeline.c
index 1b1fa715d00..12f904f8f5c 100644
--- a/source/blender/render/intern/source/pipeline.c
+++ b/source/blender/render/intern/source/pipeline.c
@@ -122,20 +122,20 @@ static int commandline_threads= -1;
 
 
 static volatile int g_break= 0;
-static int thread_break(void)
+static int thread_break(void *unused)
 {
 	return g_break;
 }
 
 /* default callbacks, set in each new render */
-static void result_nothing(RenderResult *rr) {}
-static void result_rcti_nothing(RenderResult *rr, volatile struct rcti *rect) {}
-static void stats_nothing(RenderStats *rs) {}
-static void int_nothing(int val) {}
-static int void_nothing(void) {return 0;}
-static void print_error(char *str) {printf("ERROR: %s\n", str);}
+static void result_nothing(void *unused, RenderResult *rr) {}
+static void result_rcti_nothing(void *unused, RenderResult *rr, volatile struct rcti *rect) {}
+static void stats_nothing(void *unused, RenderStats *rs) {}
+static void int_nothing(void *unused, int val) {}
+static int void_nothing(void *unused) {return 0;}
+static void print_error(void *unused, char *str) {printf("ERROR: %s\n", str);}
 
-static void stats_background(RenderStats *rs)
+static void stats_background(void *unused, RenderStats *rs)
 {
 	uintptr_t mem_in_use= MEM_get_memory_in_use();
 	float megs_used_memory= mem_in_use/(1024.0*1024.0);
@@ -1019,12 +1019,13 @@ Render *RE_NewRender(const char *name)
 	re->display_draw= result_rcti_nothing;
 	re->timecursor= int_nothing;
 	re->test_break= void_nothing;
-	re->test_return= void_nothing;
 	re->error= print_error;
 	if(G.background)
 		re->stats_draw= stats_background;
 	else
 		re->stats_draw= stats_nothing;
+	/* clear callback handles */
+	re->dih= re->dch= re->ddh= re->sdh= re->tch= re->tbh= re->erh= NULL;
 	
 	/* init some variables */
 	re->ycor= 1.0f;
@@ -1083,7 +1084,7 @@ void RE_InitState(Render *re, Render *source, RenderData *rd, int winx, int winy
 	
 	if(re->rectx < 2 || re->recty < 2 || (BKE_imtype_is_movie(rd->imtype) &&
 										  (re->rectx < 16 || re->recty < 16) )) {
-		re->error("Image too small");
+		re->error(re->erh, "Image too small");
 		re->ok= 0;
 	}
 	else {
@@ -1173,39 +1174,41 @@ void RE_SetView(Render *re, float mat[][4])
 }
 
 /* image and movie output has to move to either imbuf or kernel */
-void RE_display_init_cb(Render *re, void (*f)(RenderResult *rr))
+void RE_display_init_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr))
 {
 	re->display_init= f;
+	re->dih= handle;
 }
-void RE_display_clear_cb(Render *re, void (*f)(RenderResult *rr))
+void RE_display_clear_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr))
 {
 	re->display_clear= f;
+	re->dch= handle;
 }
-void RE_display_draw_cb(Render *re, void (*f)(RenderResult *rr, volatile rcti *rect))
+void RE_display_draw_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr, volatile rcti *rect))
 {
 	re->display_draw= f;
+	re->ddh= handle;
 }
-
-void RE_stats_draw_cb(Render *re, void (*f)(RenderStats *rs))
+void RE_stats_draw_cb(Render *re, void *handle, void (*f)(void *handle, RenderStats *rs))
 {
 	re->stats_draw= f;
+	re->sdh= handle;
 }
-void RE_timecursor_cb(Render *re, void (*f)(int))
+void RE_timecursor_cb(Render *re, void *handle, void (*f)(void *handle, int))
 {
 	re->timecursor= f;
+	re->tch= handle;
 }
 
-void RE_test_break_cb(Render *re, int (*f)(void))
+void RE_test_break_cb(Render *re, void *handle, int (*f)(void *handle))
 {
 	re->test_break= f;
+	re->tbh= handle;
 }
-void RE_test_return_cb(Render *re, int (*f)(void))
-{
-	re->test_return= f;
-}
-void RE_error_cb(Render *re, void (*f)(char *str))
+void RE_error_cb(Render *re, void *handle, void (*f)(void *handle, char *str))
 {
 	re->error= f;
+	re->erh= handle;
 }
 
 
@@ -1253,7 +1256,7 @@ static void *do_part_thread(void *pa_v)
 	RenderPart *pa= pa_v;
 	
 	/* need to return nicely all parts on esc */
-	if(R.test_break()==0) {
+	if(R.test_break(R.tbh)==0) {
 		
 		if(!R.sss_points && (R.r.scemode & R_FULL_SAMPLE))
 			pa->result= new_full_sample_buffers(&R, &pa->fullresult, &pa->disprect, pa->crop);
@@ -1289,7 +1292,7 @@ static void render_tile_processor(Render *re, int firsttile)
 {
 	RenderPart *pa;
 	
-	if(re->test_break())
+	if(re->test_break(re->tbh))
 		return;
 
 	/* hrmf... exception, this is used for preview render, re-entrant, so render result has to be re-used */
@@ -1298,7 +1301,7 @@ static void render_tile_processor(Render *re, int firsttile)
 		re->result= new_render_result(re, &re->disprect, 0, RR_USEMEM);
 	}
 	
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
  
 	if(re->result==NULL)
 		return;
@@ -1317,17 +1320,17 @@ static void render_tile_processor(Render *re, int firsttile)
 			do_part_thread(pa);
 			
 			if(pa->result) {
-				if(!re->test_break()) {
+				if(!re->test_break(re->tbh)) {
 					if(render_display_draw_enabled(re))
-						re->display_draw(pa->result, NULL);
+						re->display_draw(re->ddh, pa->result, NULL);
 					
 					re->i.partsdone++;
-					re->stats_draw(&re->i);
+					re->stats_draw(re->sdh, &re->i);
 				}
 				RE_FreeRenderResult(pa->result);
 				pa->result= NULL;
 			}		
-			if(re->test_break())
+			if(re->test_break(re->tbh))
 				break;
 		}
 	}
@@ -1444,7 +1447,7 @@ static void print_part_stats(Render *re, RenderPart *pa)
 	
 	sprintf(str, "Part %d-%d", pa->nr, re->i.totpart);
 	re->i.infostr= str;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	re->i.infostr= NULL;
 }
 
@@ -1514,7 +1517,7 @@ static void threaded_tile_processor(Render *re)
 	
 	while(rendering) {
 		
-		if(re->test_break())
+		if(re->test_break(re->tbh))
 			PIL_sleep_ms(50);
 		else if(nextpa && BLI_available_threads(&threads)) {
 			drawtimer= 0;
@@ -1547,7 +1550,7 @@ static void threaded_tile_processor(Render *re)
 				
 				if(pa->result) {
 					if(render_display_draw_enabled(re))
-						re->display_draw(pa->result, NULL);
+						re->display_draw(re->ddh, pa->result, NULL);
 					print_part_stats(re, pa);
 					
 					free_render_result(&pa->fullresult, pa->result);
@@ -1560,7 +1563,7 @@ static void threaded_tile_processor(Render *re)
 				rendering= 1;
 				if(pa->nr && pa->result && drawtimer>20) {
 					if(render_display_draw_enabled(re))
-						re->display_draw(pa->result, &pa->result->renrect);
+						re->display_draw(re->ddh, pa->result, &pa->result->renrect);
 					hasdrawn= 1;
 				}
 			}
@@ -1569,7 +1572,7 @@ static void threaded_tile_processor(Render *re)
 			drawtimer= 0;
 
 		/* on break, wait for all slots to get freed */
-		if( (g_break=re->test_break()) && BLI_available_threads(&threads)==re->r.threads)
+		if( (g_break=re->test_break(re->tbh)) && BLI_available_threads(&threads)==re->r.threads)
 			rendering= 0;
 		
 	}
@@ -1615,7 +1618,7 @@ void RE_TileProcessor(Render *re, int firsttile, int threaded)
 		
 	if(!re->sss_points)
 		re->i.lastframetime= PIL_check_seconds_timer()- re->i.starttime;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 }
 
 
@@ -1636,7 +1639,7 @@ static void do_render_3d(Render *re)
 	
 	/* do left-over 3d post effects (flares) */
 	if(re->flag & R_HALO)
-		if(!re->test_break())
+		if(!re->test_break(re->tbh))
 			add_halo_flare(re);
 
 	
@@ -1709,7 +1712,7 @@ static void do_render_blur_3d(Render *re)
 		blurfac= 1.0f/(float)(re->r.osa-blur);
 		
 		merge_renderresult_blur(rres, re->result, blurfac);
-		if(re->test_break()) break;
+		if(re->test_break(re->tbh)) break;
 	}
 	
 	/* swap results */
@@ -1721,7 +1724,7 @@ static void do_render_blur_3d(Render *re)
 	
 	/* weak... the display callback wants an active renderlayer pointer... */
 	re->result->renlay= render_get_active_layer(re, re->result);
-	re->display_draw(re->result, NULL);	
+	re->display_draw(re->ddh, re->result, NULL);	
 }
 
 
@@ -1788,7 +1791,7 @@ static void do_render_fields_3d(Render *re)
 	re->result= NULL;
 	
 	/* second field */
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		
 		re->i.curfield= 2;	/* stats */
 		
@@ -1827,7 +1830,7 @@ static void do_render_fields_3d(Render *re)
 	
 	/* weak... the display callback wants an active renderlayer pointer... */
 	re->result->renlay= render_get_active_layer(re, re->result);
-	re->display_draw(re->result, NULL);
+	re->display_draw(re->ddh, re->result, NULL);
 }
 
 static void load_backbuffer(Render *re)
@@ -1910,8 +1913,8 @@ static void do_render_fields_blur_3d(Render *re)
 				/* weak... the display callback wants an active renderlayer pointer... */
 				re->result->renlay= render_get_active_layer(re, re->result);
 				
-				re->display_init(re->result);
-				re->display_draw(re->result, NULL);
+				re->display_init(re->dih, re->result);
+				re->display_draw(re->ddh, re->result, NULL);
 			}
 		}
 	}
@@ -2017,10 +2020,10 @@ static int composite_needs_render(Scene *sce)
 }
 
 /* bad call... need to think over proper method still */
-static void render_composit_stats(char *str)
+static void render_composit_stats(void *unused, char *str)
 {
 	R.i.infostr= str;
-	R.stats_draw(&R.i);
+	R.stats_draw(R.sdh, &R.i);
 	R.i.infostr= NULL;
 }
 
@@ -2086,10 +2089,10 @@ static void do_merge_fullsample(Render *re, bNodeTree *ntree)
 		if(sample!=re->osa-1) {
 			/* weak... the display callback wants an active renderlayer pointer... */
 			re->result->renlay= render_get_active_layer(re, re->result);
-			re->display_draw(re->result, NULL);
+			re->display_draw(re->ddh, re->result, NULL);
 		}
 		
-		if(re->test_break())
+		if(re->test_break(re->tbh))
 			break;
 	}
 	
@@ -2127,8 +2130,8 @@ void RE_MergeFullSample(Render *re, Scene *sce, bNodeTree *ntree)
 		RE_ReadRenderResult(re->scene, re->scene);
 	
 	/* and now we can draw (result is there) */
-	re->display_init(re->result);
-	re->display_clear(re->result);
+	re->display_init(re->dih, re->result);
+	re->display_clear(re->dch, re->result);
 	
 	do_merge_fullsample(re, ntree);
 }
@@ -2152,7 +2155,7 @@ static void do_render_composite_fields_blur_3d(Render *re)
 	if(re->r.scemode & R_SINGLE_LAYER)
 		pop_render_result(re);
 	
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		
 		if(ntree) {
 			ntreeCompositTagRender(re->scene);
@@ -2165,9 +2168,11 @@ static void do_render_composite_fields_blur_3d(Render *re)
 				if((re->r.scemode & R_SINGLE_LAYER)==0)
 					ntree_render_scenes(re);
 				
-				if(!re->test_break()) {
+				if(!re->test_break(re->tbh)) {
 					ntree->stats_draw= render_composit_stats;
 					ntree->test_break= re->test_break;
+					ntree->sdh= re->sdh;
+					ntree->tbh= re->tbh;
 					/* in case it was never initialized */
 					R.stats_draw= re->stats_draw;
 					
@@ -2178,6 +2183,7 @@ static void do_render_composite_fields_blur_3d(Render *re)
 					
 					ntree->stats_draw= NULL;
 					ntree->test_break= NULL;
+					ntree->tbh= ntree->sdh= NULL;
 				}
 			}
 			else if(re->r.scemode & R_FULL_SAMPLE)
@@ -2187,7 +2193,7 @@ static void do_render_composite_fields_blur_3d(Render *re)
 
 	/* weak... the display callback wants an active renderlayer pointer... */
 	re->result->renlay= render_get_active_layer(re, re->result);
-	re->display_draw(re->result, NULL);
+	re->display_draw(re->ddh, re->result, NULL);
 }
 
 #ifndef DISABLE_YAFRAY
@@ -2237,14 +2243,14 @@ static void yafrayRender(Render *re)
 				RE_FreeRenderResult(re->result);
 				re->result= rres;
 				
-				re->display_init(re->result);
-				re->display_draw(re->result, NULL);
+				re->display_init(re->dih, re->result);
+				re->display_draw(re->ddh, re->result, NULL);
 			}
 		}
 	}
 
 	re->i.lastframetime = PIL_check_seconds_timer()- re->i.starttime;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	
 	RE_Database_Free(re);
 }
@@ -2273,11 +2279,11 @@ static void do_render_all_options(Render *re)
 	
 	if(re->r.scemode & R_DOSEQ) {
 		/* note: do_render_seq() frees rect32 when sequencer returns float images */
-		if(!re->test_break()) 
+		if(!re->test_break(re->tbh)) 
 			; //XXX do_render_seq(re->result, re->r.cfra);
 		
-		re->stats_draw(&re->i);
-		re->display_draw(re->result, NULL);
+		re->stats_draw(re->sdh, &re->i);
+		re->display_draw(re->ddh, re->result, NULL);
 		
 	}
 	else {
@@ -2296,12 +2302,12 @@ static void do_render_all_options(Render *re)
 	
 	re->i.lastframetime= PIL_check_seconds_timer()- re->i.starttime;
 	
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	
 	/* stamp image info here */
 	if((re->r.scemode & R_STAMP_INFO) && (re->r.stamp & R_STAMP_DRAW)) {
 		renderresult_stampinfo(re->scene);
-		re->display_draw(re->result, NULL);
+		re->display_draw(re->ddh, re->result, NULL);
 	}
 }
 
@@ -2312,11 +2318,11 @@ static int is_rendering_allowed(Render *re)
 	/* forbidden combinations */
 	if(re->r.mode & R_PANORAMA) {
 		if(re->r.mode & R_BORDER) {
-			re->error("No border supported for Panorama");
+			re->error(re->erh, "No border supported for Panorama");
 			return 0;
 		}
 		if(re->r.mode & R_ORTHO) {
-			re->error("No Ortho render possible for Panorama");
+			re->error(re->erh, "No Ortho render possible for Panorama");
 			return 0;
 		}
 	}
@@ -2324,11 +2330,11 @@ static int is_rendering_allowed(Render *re)
 	if(re->r.mode & R_BORDER) {
 		if(re->r.border.xmax <= re->r.border.xmin || 
 		   re->r.border.ymax <= re->r.border.ymin) {
-			re->error("No border area selected.");
+			re->error(re->erh, "No border area selected.");
 			return 0;
 		}
 		if(re->r.scemode & R_EXR_TILE_FILE) {
-			re->error("Border render and Buffer-save not supported yet");
+			re->error(re->erh, "Border render and Buffer-save not supported yet");
 			return 0;
 		}
 	}
@@ -2339,7 +2345,7 @@ static int is_rendering_allowed(Render *re)
 		render_unique_exr_name(re, str, 0);
 		
 		if (BLI_is_writable(str)==0) {
-			re->error("Can not save render buffers, check the temp default path");
+			re->error(re->erh, "Can not save render buffers, check the temp default path");
 			return 0;
 		}
 		
@@ -2349,7 +2355,7 @@ static int is_rendering_allowed(Render *re)
 		
 		/* no fullsample and edge */
 		if((re->r.scemode & R_FULL_SAMPLE) && (re->r.mode & R_EDGE)) {
-			re->error("Full Sample doesn't support Edge Enhance");
+			re->error(re->erh, "Full Sample doesn't support Edge Enhance");
 			return 0;
 		}
 		
@@ -2363,7 +2369,7 @@ static int is_rendering_allowed(Render *re)
 			bNode *node;
 		
 			if(ntree==NULL) {
-				re->error("No Nodetree in Scene");
+				re->error(re->erh, "No Nodetree in Scene");
 				return 0;
 			}
 			
@@ -2373,7 +2379,7 @@ static int is_rendering_allowed(Render *re)
 			
 			
 			if(node==NULL) {
-				re->error("No Render Output Node in Scene");
+				re->error(re->erh, "No Render Output Node in Scene");
 				return 0;
 			}
 		}
@@ -2385,7 +2391,7 @@ static int is_rendering_allowed(Render *re)
 	
 	if(!(re->r.scemode & (R_DOSEQ|R_DOCOMP))) {
 		if(re->scene->camera==NULL) {
-			re->error("No camera");
+			re->error(re->erh, "No camera");
 			return 0;
 		}
 	}
@@ -2401,13 +2407,13 @@ static int is_rendering_allowed(Render *re)
 		if(!(srl->layflag & SCE_LAY_DISABLE))
 			break;
 	if(srl==NULL) {
-		re->error("All RenderLayers are disabled");
+		re->error(re->erh, "All RenderLayers are disabled");
 		return 0;
 	}
 	
 	/* renderer */
 	if(!ELEM(re->r.renderer, R_INTERN, R_YAFRAY)) {
-		re->error("Unknown render engine set");
+		re->error(re->erh, "Unknown render engine set");
 		return 0;
 	}
 	return 1;
@@ -2464,8 +2470,8 @@ static int render_initialize_from_scene(Render *re, Scene *scene, int anim)
 	if(!is_rendering_allowed(re))
 		return 0;
 	
-	re->display_init(re->result);
-	re->display_clear(re->result);
+	re->display_init(re->dih, re->result);
+	re->display_clear(re->dch, re->result);
 	
 	return 1;
 }
@@ -2585,11 +2591,11 @@ void RE_BlenderAnim(Render *re, Scene *scene, int sfra, int efra, int tfra)
 				
 				do_render_all_options(re);
 
-				if(re->test_break() == 0) {
+				if(re->test_break(re->tbh) == 0) {
 					do_write_image_or_movie(re, scene, mh);
 				}
 			} else {
-				re->test_break();
+				re->test_break(re->tbh);
 			}
 		}
 	} else {
@@ -2633,7 +2639,7 @@ void RE_BlenderAnim(Render *re, Scene *scene, int sfra, int efra, int tfra)
 			
 			do_render_all_options(re);
 			
-			if(re->test_break() == 0) {
+			if(re->test_break(re->tbh) == 0) {
 				do_write_image_or_movie(re, scene, mh);
 			}
 		
diff --git a/source/blender/render/intern/source/rayshade.c b/source/blender/render/intern/source/rayshade.c
index a54afafc8c9..e89cf20e4b1 100644
--- a/source/blender/render/intern/source/rayshade.c
+++ b/source/blender/render/intern/source/rayshade.c
@@ -180,13 +180,13 @@ void makeraytree(Render *re)
 				double time= PIL_check_seconds_timer();
 
 				vlr= obr->vlaknodes[v>>8].vlak;
-				if(re->test_break())
+				if(re->test_break(re->tbh))
 					break;
 				if(time-lasttime>1.0f) {
 					char str[32];
 					sprintf(str, "Filling Octree: %d", totv);
 					re->i.infostr= str;
-					re->stats_draw(&re->i);
+					re->stats_draw(re->sdh, &re->i);
 					re->i.infostr= NULL;
 					lasttime= time;
 				}
@@ -202,7 +202,7 @@ void makeraytree(Render *re)
 	RE_ray_tree_done(re->raytree);
 	
 	re->i.infostr= NULL;
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 }
 
 static void shade_ray(Isect *is, ShadeInput *shi, ShadeResult *shr)
diff --git a/source/blender/render/intern/source/rendercore.c b/source/blender/render/intern/source/rendercore.c
index c3b281f2a23..ebefbad6e21 100644
--- a/source/blender/render/intern/source/rendercore.c
+++ b/source/blender/render/intern/source/rendercore.c
@@ -314,7 +314,7 @@ static void halo_tile(RenderPart *pa, RenderLayer *rl)
 				}
 			}
 		}
-		if(R.test_break() ) break; 
+		if(R.test_break(R.tbh) ) break; 
 	}
 }
 
@@ -430,7 +430,7 @@ static void lamphalo_tile(RenderPart *pa, RenderLayer *rl)
 			if(rd) rd++;
 		}
 		if(y&1)
-			if(R.test_break()) break; 
+			if(R.test_break(R.tbh)) break; 
 	}
 }				
 
@@ -662,7 +662,7 @@ static void sky_tile(RenderPart *pa, RenderLayer *rl)
 		}
 		
 		if(y&1)
-			if(R.test_break()) break; 
+			if(R.test_break(R.tbh)) break; 
 	}
 }
 
@@ -760,7 +760,7 @@ static void shadeDA_tile(RenderPart *pa, RenderLayer *rl)
 	int samp;
 	int x, y, seed, crop=0, offs=0, od;
 	
-	if(R.test_break()) return; 
+	if(R.test_break(R.tbh)) return; 
 	
 	/* irregular shadowb buffer creation */
 	if(R.r.mode & R_SHADOW)
@@ -821,7 +821,7 @@ static void shadeDA_tile(RenderPart *pa, RenderLayer *rl)
 		rectdaps+= pa->rectx;
 		offs+= pa->rectx;
 		
-		if(y&1) if(R.test_break()) break; 
+		if(y&1) if(R.test_break(R.tbh)) break; 
 	}
 	
 	/* disable scanline updating */
@@ -1142,7 +1142,7 @@ void zbufshadeDA_tile(RenderPart *pa)
 			sdata.psmlist= &psmlist;
 			sdata.edgerect= edgerect;
 			zbuffer_solid(pa, rl, make_pixelstructs, &sdata);
-			if(R.test_break()) break; 
+			if(R.test_break(R.tbh)) break; 
 		}
 		
 		/* shades solid */
@@ -1280,7 +1280,7 @@ void zbufshade_tile(RenderPart *pa)
 		
 		zbuffer_solid(pa, rl, NULL, NULL);
 		
-		if(!R.test_break()) {	/* NOTE: this if() is not consistant */
+		if(!R.test_break(R.tbh)) {	/* NOTE: this if() is not consistant */
 			
 			/* edges only for solid part, ztransp doesn't support it yet anti-aliased */
 			if(rl->layflag & SCE_LAY_EDGE) {
@@ -1325,7 +1325,7 @@ void zbufshade_tile(RenderPart *pa)
 						}
 					}
 					if(y&1)
-						if(R.test_break()) break; 
+						if(R.test_break(R.tbh)) break; 
 				}
 				
 				if(R.occlusiontree)
@@ -1377,7 +1377,7 @@ void zbufshade_tile(RenderPart *pa)
 		if(rl->layflag & SCE_LAY_SKY)
 			sky_tile(pa, rl);
 		
-		if(!R.test_break()) {
+		if(!R.test_break(R.tbh)) {
 			if(rl->layflag & SCE_LAY_EDGE) 
 				if(R.r.mode & R_EDGE)
 					edge_enhance_add(pa, rl->rectf, edgerect);
@@ -1717,7 +1717,7 @@ void zbufshade_sss_tile(RenderPart *pa)
 		}
 
 		if(y&1)
-			if(re->test_break()) break; 
+			if(re->test_break(re->tbh)) break; 
 	}
 
 	/* note: after adding we do not free these arrays, sss keeps them */
@@ -1797,7 +1797,7 @@ static void renderhalo_post(RenderResult *rr, float *rectf, HaloRen *har)	/* pos
 	
 				rectft+= 4*rr->rectx;
 				
-				if(R.test_break()) break; 
+				if(R.test_break(R.tbh)) break; 
 			}
 		}
 	}
@@ -1915,7 +1915,7 @@ void add_halo_flare(Render *re)
 	if(do_draw) {
 		/* weak... the display callback wants an active renderlayer pointer... */
 		rr->renlay= rl;
-		re->display_draw(rr, NULL);
+		re->display_draw(re->ddh, rr, NULL);
 	}
 	
 	R.r.mode= mode;	
@@ -2334,7 +2334,7 @@ static void do_bake_shade(void *handle, int x, int y, float u, float v)
 	ShadeInput *shi= ssamp->shi;
 	
 	/* fast threadsafe break test */
-	if(R.test_break())
+	if(R.test_break(R.tbh))
 		return;
 	
 	/* setup render coordinates */
@@ -2567,7 +2567,7 @@ static void *do_bake_thread(void *bs_v)
 		shade_tface(bs);
 		
 		/* fast threadsafe break test */
-		if(R.test_break())
+		if(R.test_break(R.tbh))
 			break;
 	}
 	bs->ready= 1;
diff --git a/source/blender/render/intern/source/shadbuf.c b/source/blender/render/intern/source/shadbuf.c
index c53a2b68c9c..71cd678233d 100644
--- a/source/blender/render/intern/source/shadbuf.c
+++ b/source/blender/render/intern/source/shadbuf.c
@@ -425,7 +425,7 @@ void makeshadowbuf(Render *re, LampRen *lar)
 			/* create Z tiles (for compression): this system is 24 bits!!! */
 			compress_shadowbuf(shb, rectz, lar->mode & LA_SQUARE);
 
-			if(re->test_break())
+			if(re->test_break(re->tbh))
 				break;
 		}
 		
@@ -457,13 +457,13 @@ static void *do_shadow_thread(void *re_v)
 			lar->thread_ready= 1;
 			BLI_unlock_thread(LOCK_CUSTOM1);
 		}
-	} while(lar && !re->test_break());
+	} while(lar && !re->test_break(re->tbh));
 
 	return NULL;
 }
 
 static volatile int g_break= 0;
-static int thread_break(void)
+static int thread_break(void *unused)
 {
 	return g_break;
 }
@@ -473,7 +473,7 @@ void threaded_makeshadowbufs(Render *re)
 	ListBase threads;
 	LampRen *lar;
 	int a, totthread= 0;
-	int (*test_break)(void);
+	int (*test_break)(void *);
 
 	/* count number of threads to use */
 	if(G.rendering) {
@@ -488,7 +488,7 @@ void threaded_makeshadowbufs(Render *re)
 
 	if(totthread <= 1) {
 		for(lar=re->lampren.first; lar; lar= lar->next) {
-			if(re->test_break()) break;
+			if(re->test_break(re->tbh)) break;
 			if(lar->shb) {
 				/* if type is irregular, this only sets the perspective matrix and autoclips */
 				makeshadowbuf(re, lar);
@@ -512,7 +512,7 @@ void threaded_makeshadowbufs(Render *re)
 
 		/* keep rendering as long as there are shadow buffers not ready */
 		do {
-			if((g_break=test_break()))
+			if((g_break=test_break(re->tbh)))
 				break;
 
 			PIL_sleep_ms(50);
diff --git a/source/blender/render/intern/source/sss.c b/source/blender/render/intern/source/sss.c
index 9bde6675798..7bb2aef2e6e 100644
--- a/source/blender/render/intern/source/sss.c
+++ b/source/blender/render/intern/source/sss.c
@@ -852,7 +852,7 @@ static void sss_create_tree_mat(Render *re, Material *mat)
 	float (*co)[3] = NULL, (*color)[3] = NULL, *area = NULL;
 	int totpoint = 0, osa, osaflag, partsdone;
 
-	if(re->test_break())
+	if(re->test_break(re->tbh))
 		return;
 	
 	points.first= points.last= NULL;
@@ -888,7 +888,7 @@ static void sss_create_tree_mat(Render *re, Material *mat)
 		return;
 
 	/* merge points together into a single buffer */
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		for(totpoint=0, p=points.first; p; p=p->next)
 			totpoint += p->totpoint;
 		
@@ -913,7 +913,7 @@ static void sss_create_tree_mat(Render *re, Material *mat)
 	BLI_freelistN(&points);
 
 	/* build tree */
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		SSSData *sss= MEM_callocN(sizeof(*sss), "SSSData");
 		float ior= mat->sss_ior, cfac= mat->sss_colfac;
 		float *col= mat->sss_col, *radius= mat->sss_radius;
@@ -981,7 +981,7 @@ void make_sss_tree(Render *re)
 	re->sss_hash= BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp);
 
 	re->i.infostr= "SSS preprocessing";
-	re->stats_draw(&re->i);
+	re->stats_draw(re->sdh, &re->i);
 	
 	for(mat= G.main->mat.first; mat; mat= mat->id.next)
 		if(mat->id.us && (mat->flag & MA_IS_USED) && (mat->sss_flag & MA_DIFF_SSS))
diff --git a/source/blender/render/intern/source/strand.c b/source/blender/render/intern/source/strand.c
index 05e36160f0e..3c8c1640b75 100644
--- a/source/blender/render/intern/source/strand.c
+++ b/source/blender/render/intern/source/strand.c
@@ -773,7 +773,7 @@ int zbuffer_strands_abuf(Render *re, RenderPart *pa, RenderLayer *rl, APixstrand
 	float z[4], bounds[4], winmat[4][4];
 	int a, b, c, i, totsegment, clip[4];
 
-	if(re->test_break())
+	if(re->test_break(re->tbh))
 		return 0;
 	if(re->totstrand == 0)
 		return 0;
@@ -881,7 +881,7 @@ int zbuffer_strands_abuf(Render *re, RenderPart *pa, RenderLayer *rl, APixstrand
 		}
 	}
 
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		/* convert list to array and sort */
 		sortsegments= MEM_mallocN(sizeof(StrandSortSegment)*totsegment, "StrandSortSegment");
 		for(a=0, sortseg=firstseg; a<totsegment; a++, sortseg=sortseg->next)
@@ -893,11 +893,11 @@ int zbuffer_strands_abuf(Render *re, RenderPart *pa, RenderLayer *rl, APixstrand
 
 	spart.totapixbuf= MEM_callocN(sizeof(int)*pa->rectx*pa->recty, "totapixbuf");
 
-	if(!re->test_break()) {
+	if(!re->test_break(re->tbh)) {
 		/* render segments in sorted order */
 		sortseg= sortsegments;
 		for(a=0; a<totsegment; a++, sortseg++) {
-			if(re->test_break())
+			if(re->test_break(re->tbh))
 				break;
 
 			obi= &re->objectinstance[sortseg->obi];
diff --git a/source/blender/render/intern/source/zbuf.c b/source/blender/render/intern/source/zbuf.c
index 509ac81c58b..b68cecce7bd 100644
--- a/source/blender/render/intern/source/zbuf.c
+++ b/source/blender/render/intern/source/zbuf.c
@@ -2495,7 +2495,7 @@ void zbuffer_shadow(Render *re, float winmat[][4], LampRen *lar, int *rectz, int
 				}
 			}
 
-			if((a & 255)==255 && re->test_break()) 
+			if((a & 255)==255 && re->test_break(re->tbh)) 
 				break;
 		}
 
@@ -2544,13 +2544,13 @@ void zbuffer_shadow(Render *re, float winmat[][4], LampRen *lar, int *rectz, int
 						}
 					}
 
-					if((a & 255)==255 && re->test_break()) 
+					if((a & 255)==255 && re->test_break(re->tbh)) 
 						break;
 				}
 			}
 		}
 
-		if(re->test_break()) 
+		if(re->test_break(re->tbh)) 
 			break;
 	}
 	
@@ -3512,13 +3512,13 @@ static int zbuffer_abuf(RenderPart *pa, APixstr *APixbuf, ListBase *apsmbase, Re
 						}
 					}
 					if((v & 255)==255) 
-						if(R.test_break()) 
+						if(R.test_break(R.tbh)) 
 							break; 
 				}
 			}
 		}
 
-		if(R.test_break()) break;
+		if(R.test_break(R.tbh)) break;
 	}
 	
 	for(zsample=0; zsample<samples; zsample++) {
@@ -4013,7 +4013,7 @@ unsigned short *zbuffer_transp_shade(RenderPart *pa, RenderLayer *rl, float *pas
 	unsigned short *ztramask= NULL, filled;
 
 	/* looks nicer for calling code */
-	if(R.test_break())
+	if(R.test_break(R.tbh))
 		return NULL;
 	
 	if(R.osa>16) { /* MAX_OSA */
@@ -4096,7 +4096,7 @@ unsigned short *zbuffer_transp_shade(RenderPart *pa, RenderLayer *rl, float *pas
 		apstrand= aprectstrand;
 		od= offs;
 		
-		if(R.test_break())
+		if(R.test_break(R.tbh))
 			break;
 		
 		for(x=pa->disprect.xmin+crop; x<pa->disprect.xmax-crop; x++, ap++, apstrand++, pass+=4, od++) {