Ejemplo n.º 1
0
GF_EXPORT
GF_Err gf_sg_command_apply(GF_SceneGraph *graph, GF_Command *com, Double time_offset)
{
	GF_Err e;
	GF_CommandField *inf;
	GF_FieldInfo field;
	GF_Node *def, *node;
	void *slot_ptr;

	if (!com || !graph) return GF_BAD_PARAM;

	e = GF_OK;
	switch (com->tag) {
	case GF_SG_SCENE_REPLACE:
		/*unregister root*/
		gf_node_unregister(graph->RootNode, NULL);
		/*remove all protos and routes*/
		while (gf_list_count(graph->routes_to_activate)) 
			gf_list_rem(graph->routes_to_activate, 0);
		
		/*destroy all routes*/
		while (gf_list_count(graph->Routes)) {
			GF_Route *r = (GF_Route *)gf_list_get(graph->Routes, 0);
			/*this will unregister the route from the graph, so don't delete the chain entry*/
			gf_sg_route_del(r);
		}
		/*destroy all proto*/
		while (gf_list_count(graph->protos)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(graph->protos, 0);
			/*this will unregister the proto from the graph, so don't delete the chain entry*/
			gf_sg_proto_del(p);
		}
		/*DO NOT TOUCH node registry*/
		/*DO NOT TOUCH UNREGISTERED PROTOS*/

		/*move all protos in graph*/
		while (gf_list_count(com->new_proto_list)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(com->new_proto_list, 0);
			gf_list_rem(com->new_proto_list, 0);
			gf_list_del_item(graph->unregistered_protos, p);
			gf_list_add(graph->protos, p);
		}
		/*assign new root (no need to register/unregister)*/
		graph->RootNode = com->node;
		com->node = NULL;
		break;

	case GF_SG_NODE_REPLACE:
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		e = gf_node_replace(com->node, inf->new_node, 0);
		if (inf->new_node) gf_node_register(inf->new_node, NULL);
		break;

	case GF_SG_MULTIPLE_REPLACE:
	case GF_SG_FIELD_REPLACE:
	{
		u32 j;
		GF_ChildNodeItem *list, *cur, *prev;
		j=0;
		while ((inf = (GF_CommandField*)gf_list_enum(com->command_fields, &j))) {
			e = gf_node_get_field(com->node, inf->fieldIndex, &field);
			if (e) return e;

			switch (field.fieldType) {
			case GF_SG_VRML_SFNODE:
			{
				node = *((GF_Node **) field.far_ptr);
				e = gf_node_unregister(node, com->node);
				*((GF_Node **) field.far_ptr) = inf->new_node;
				if (!e) gf_node_register(inf->new_node, com->node);
				break;
			}
			case GF_SG_VRML_MFNODE:
				gf_node_unregister_children(com->node, * ((GF_ChildNodeItem **) field.far_ptr));
				* ((GF_ChildNodeItem **) field.far_ptr) = NULL;

				list = * ((GF_ChildNodeItem **) inf->field_ptr);
				prev=NULL;
				while (list) {
					cur = malloc(sizeof(GF_ChildNodeItem));
					cur->next = NULL;
					cur->node = list->node;
					if (prev) {
						prev->next = cur;
					} else {
						* ((GF_ChildNodeItem **) field.far_ptr) = cur;
					}
					gf_node_register(list->node, com->node);
					prev = cur;
					list = list->next;
				}
				break;
			default:
				/*this is a regular field, reset it and clone - we cannot switch pointers since the
				original fields are NOT pointers*/
				if (!gf_sg_vrml_is_sf_field(field.fieldType)) {
					e = gf_sg_vrml_mf_reset(field.far_ptr, field.fieldType);
				}
				if (e) return e;
				gf_sg_vrml_field_copy(field.far_ptr, inf->field_ptr, field.fieldType);
				if (field.fieldType==GF_SG_VRML_SFTIME) *(SFTime *)field.far_ptr = *(SFTime *)field.far_ptr + time_offset;
				break;
			}
			SG_CheckFieldChange(com->node, &field);
		}
		break;
	}

	case GF_SG_MULTIPLE_INDEXED_REPLACE:
	case GF_SG_INDEXED_REPLACE:
	{
		u32 sftype, i=0;
		while ((inf = (GF_CommandField*)gf_list_enum(com->command_fields, &i))) {
			e = gf_node_get_field(com->node, inf->fieldIndex, &field);
			if (e) return e;

			/*if MFNode remove the child and set new node*/
			if (field.fieldType == GF_SG_VRML_MFNODE) {
				/*we must remove the node before in case the new node uses the same ID (not forbidden) and this
				command removes the last instance of the node with the same ID*/
				gf_node_replace_child(com->node, (GF_ChildNodeItem**) field.far_ptr, inf->pos, inf->new_node);
				if (inf->new_node) gf_node_register(inf->new_node, NULL);
			}
			/*erase the field item*/
			else {
				if ((inf->pos < 0) || ((u32) inf->pos >= ((GenMFField *) field.far_ptr)->count) ) {
					inf->pos = ((GenMFField *)field.far_ptr)->count - 1;
					/*may happen with text and default value*/
					if (inf->pos < 0) {
						inf->pos = 0;
						gf_sg_vrml_mf_alloc(field.far_ptr, field.fieldType, 1);
					}
				}
				e = gf_sg_vrml_mf_get_item(field.far_ptr, field.fieldType, & slot_ptr, inf->pos);
				if (e) return e;
				sftype = gf_sg_vrml_get_sf_type(field.fieldType);
				gf_sg_vrml_field_copy(slot_ptr, inf->field_ptr, sftype);
				/*note we don't add time offset, since there's no MFTime*/
			}
			SG_CheckFieldChange(com->node, &field);
		}
		break;
	}
	case GF_SG_ROUTE_REPLACE:
	{
		GF_Route *r;
		char *name;
		r = gf_sg_route_find(graph, com->RouteID);
		def = gf_sg_find_node(graph, com->fromNodeID);
		node = gf_sg_find_node(graph, com->toNodeID);
		if (!node || !def) return GF_SG_UNKNOWN_NODE;
		name = NULL;
		if (r) {
			name = r->name;
			r->name = NULL;
			gf_sg_route_del(r);
		}
		r = gf_sg_route_new(graph, def, com->fromFieldIndex, node, com->toFieldIndex);
		gf_sg_route_set_id(r, com->RouteID);
		if (name) {
			gf_sg_route_set_name(r, name);
			free(name);
		}
		break;
	}
	case GF_SG_NODE_DELETE_EX:
	case GF_SG_NODE_DELETE:
	{
		if (com->node) gf_node_replace(com->node, NULL, (com->tag==GF_SG_NODE_DELETE_EX) ? 1 : 0);
		break;
	}
	case GF_SG_ROUTE_DELETE:
	{
		return gf_sg_route_del_by_id(graph, com->RouteID);
	}
	case GF_SG_INDEXED_DELETE:
	{
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);

		e = gf_node_get_field(com->node, inf->fieldIndex, &field);
		if (e) return e;
		if (gf_sg_vrml_is_sf_field(field.fieldType)) return GF_NON_COMPLIANT_BITSTREAM;

		/*then we need special handling in case of a node*/
		if (gf_sg_vrml_get_sf_type(field.fieldType) == GF_SG_VRML_SFNODE) {
			e = gf_node_replace_child(com->node, (GF_ChildNodeItem **) field.far_ptr, inf->pos, NULL);
		} else {
			if ((inf->pos < 0) || ((u32) inf->pos >= ((GenMFField *) field.far_ptr)->count) ) {
				inf->pos = ((GenMFField *)field.far_ptr)->count - 1;
			}
			/*this is a regular MFField, just remove the item (realloc)*/
			e = gf_sg_vrml_mf_remove(field.far_ptr, field.fieldType, inf->pos);
		}
		/*deletion -> node has changed*/
		if (!e) SG_CheckFieldChange(com->node, &field);
		break;
	}
	case GF_SG_NODE_INSERT:
	{
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);

		e = gf_node_insert_child(com->node, inf->new_node, inf->pos);
		if (!e) gf_node_register(inf->new_node, com->node);
		if (!e) gf_node_event_out(com->node, inf->fieldIndex);
		if (!e) gf_node_changed(com->node, NULL);
		break;
	}
	case GF_SG_ROUTE_INSERT:
	{
		GF_Route *r;
		def = gf_sg_find_node(graph, com->fromNodeID);
		node = gf_sg_find_node(graph, com->toNodeID);
		if (!node || !def) return GF_SG_UNKNOWN_NODE;
		r = gf_sg_route_new(graph, def, com->fromFieldIndex, node, com->toFieldIndex);
		if (com->RouteID) gf_sg_route_set_id(r, com->RouteID);
		if (com->def_name) {
			gf_sg_route_set_name(r, com->def_name);
			free(com->def_name);
			com->def_name = NULL;
		}
		break;
	}
	case GF_SG_INDEXED_INSERT:
	{
		u32 sftype;
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		e = gf_node_get_field(com->node, inf->fieldIndex, &field);
		if (e) return e;

		/*rescale the MFField and parse the SFField*/
		if (field.fieldType != GF_SG_VRML_MFNODE) {
			if (inf->pos == -1) {
				e = gf_sg_vrml_mf_append(field.far_ptr, field.fieldType, & slot_ptr);
			} else {
				e = gf_sg_vrml_mf_insert(field.far_ptr, field.fieldType, & slot_ptr, inf->pos);
			}
			if (e) return e;
			sftype = gf_sg_vrml_get_sf_type(field.fieldType);
			gf_sg_vrml_field_copy(slot_ptr, inf->field_ptr, sftype);
		} else {
			if (inf->new_node) {
				if (inf->pos == -1) {
					gf_node_list_add_child( (GF_ChildNodeItem **) field.far_ptr, inf->new_node);
				} else {
					gf_node_list_insert_child((GF_ChildNodeItem **) field.far_ptr, inf->new_node, inf->pos);
				}
				gf_node_register(inf->new_node, com->node);
			}
		}
		if (!e) SG_CheckFieldChange(com->node, &field);
		break;
	}
	case GF_SG_PROTO_INSERT:
		/*destroy all proto*/
		while (gf_list_count(com->new_proto_list)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(com->new_proto_list, 0);
			gf_list_rem(com->new_proto_list, 0);
			gf_list_del_item(graph->unregistered_protos, p);
			gf_list_add(graph->protos, p);
		}
		return GF_OK;
	case GF_SG_PROTO_DELETE:
		{
			u32 i;
			for (i=0; i<com->del_proto_list_size; i++) {
				/*note this will check for unregistered protos, but since IDs are unique we are sure we will 
				not destroy an unregistered one*/
				GF_Proto *proto = gf_sg_find_proto(graph, com->del_proto_list[i], NULL);
				if (proto) gf_sg_proto_del(proto);
			}
		}
		return GF_OK;
	case GF_SG_PROTO_DELETE_ALL:
		/*destroy all proto*/
		while (gf_list_count(graph->protos)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(graph->protos, 0);
			gf_list_rem(graph->protos, 0);
			/*this will unregister the proto from the graph, so don't delete the chain entry*/
			gf_sg_proto_del(p);
		}
		/*DO NOT TOUCH UNREGISTERED PROTOS*/
		return GF_OK;
	/*only used by BIFS*/
	case GF_SG_GLOBAL_QUANTIZER:
		return GF_OK;

#ifndef GPAC_DISABLE_SVG
	/*laser commands*/
	case GF_SG_LSR_NEW_SCENE:
		/*DO NOT TOUCH node registry*/

		/*assign new root (no need to register/unregister)*/
		graph->RootNode = com->node;
		com->node = NULL;
		break;
	case GF_SG_LSR_DELETE:
		if (!com->node) return GF_NON_COMPLIANT_BITSTREAM;
		if (!gf_list_count(com->command_fields)) {
			gf_node_replace(com->node, NULL, 0);
			gf_node_deactivate(com->node);
			return GF_OK;
		}
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		node = gf_node_list_get_child(((SVG_Element *)com->node)->children, inf->pos);
		if (node) {
			e = gf_node_replace_child(com->node, &((SVG_Element *)com->node)->children, inf->pos, NULL);
			gf_node_deactivate(node);
		}
		break;
	case GF_SG_LSR_INSERT:
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		if (!com->node || !inf) return GF_NON_COMPLIANT_BITSTREAM;
		if (inf->new_node) {
			if (inf->pos<0) 
				gf_node_list_add_child(& ((SVG_Element *)com->node)->children, inf->new_node);
			else
				gf_node_list_insert_child(& ((SVG_Element *)com->node)->children, inf->new_node, inf->pos);

			gf_node_register(inf->new_node, com->node);
			gf_node_activate(inf->new_node);
			gf_node_changed(com->node, NULL);
		} else {
			/*NOT SUPPORTED*/
			GF_LOG(GF_LOG_ERROR, GF_LOG_CODEC, ("[LASeR] VALUE INSERTION NOT SUPPORTED\n"));
		}
		break;
	case GF_SG_LSR_ADD:
	case GF_SG_LSR_REPLACE:
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		if (!com->node || !inf) return GF_NON_COMPLIANT_BITSTREAM;
		if (inf->new_node) {
			if (inf->pos<0) {
				/*if fieldIndex (eg attributeName) is set, this is children replacement*/
				if (inf->fieldIndex>0) {
					gf_node_unregister_children_deactivate(com->node, ((SVG_Element *)com->node)->children);
					((SVG_Element *)com->node)->children = NULL;
					gf_node_list_add_child(& ((SVG_Element *)com->node)->children, inf->new_node);
					gf_node_register(inf->new_node, com->node);
					gf_node_activate(inf->new_node);
				} else {
					e = gf_node_replace(com->node, inf->new_node, 0);
					gf_node_activate(inf->new_node);
				}
			} else {
				node = gf_node_list_get_child( ((SVG_Element *)com->node)->children, inf->pos);
				gf_node_replace_child(com->node, & ((SVG_Element *)com->node)->children, inf->pos, inf->new_node);
				gf_node_register(inf->new_node, com->node);
				if (node) gf_node_deactivate(node);
				gf_node_activate(inf->new_node);
			}
			/*signal node modif*/
			gf_node_changed(com->node, NULL);
			return e;
		} else if (inf->node_list) {
			GF_ChildNodeItem *child, *cur, *prev;
			gf_node_unregister_children_deactivate(com->node, ((SVG_Element *)com->node)->children);
			((SVG_Element *)com->node)->children = NULL;

			prev = NULL;
			child = inf->node_list;
			while (child) {
				cur = (GF_ChildNodeItem*)malloc(sizeof(GF_ChildNodeItem));
				cur->next = NULL;
				cur->node = child->node;
				gf_node_register(child->node, com->node);
				gf_node_activate(child->node);
				if (prev) prev->next = cur;
				else ((SVG_Element *)com->node)->children = cur;
				prev = cur;
				child = child->next;
			}
			/*signal node modif*/
			gf_node_changed(com->node, NULL);
			return GF_OK;
		}
		/*attribute modif*/
		else if (inf->field_ptr) {
			GF_FieldInfo a, b;
			if (inf->fieldIndex==(u32) -2) {
				GF_Point2D scale, translate;
				Fixed rotate;
				GF_Matrix2D *dest;
				gf_node_get_field_by_name(com->node, "transform", &a);
				dest = (GF_Matrix2D*)a.far_ptr;
				
				if (com->tag==GF_SG_LSR_REPLACE) {
					if (gf_mx2d_decompose(dest, &scale, &rotate, &translate)) {
						gf_mx2d_init(*dest);
						if (inf->fieldType==SVG_TRANSFORM_SCALE) scale = *(GF_Point2D *)inf->field_ptr;
						else if (inf->fieldType==SVG_TRANSFORM_TRANSLATE) translate = *(GF_Point2D *)inf->field_ptr;
						else if (inf->fieldType==SVG_TRANSFORM_ROTATE) rotate = ((SVG_Point_Angle*)inf->field_ptr)->angle;

						gf_mx2d_add_scale(dest, scale.x, scale.y);
						gf_mx2d_add_rotation(dest, 0, 0, rotate);
						gf_mx2d_add_translation(dest, translate.x, translate.y);
					}
				} else {
					GF_Point2D *pt = (GF_Point2D *)inf->field_ptr;
					if (inf->fieldType==SVG_TRANSFORM_SCALE) gf_mx2d_add_scale(dest, pt->x, pt->y);
					else if (inf->fieldType==SVG_TRANSFORM_TRANSLATE) gf_mx2d_add_translation(dest, pt->x, pt->y);
					else if (inf->fieldType == SVG_TRANSFORM_ROTATE) gf_mx2d_add_rotation(dest, 0, 0, ((SVG_Point_Angle*)inf->field_ptr)->angle);
				}
			} else {
				if ((inf->fieldIndex==(u32) -1) && (inf->fieldType==SVG_String_datatype)) {
					char *str = *(SVG_String*)inf->field_ptr;

					if (com->tag == GF_SG_LSR_REPLACE) {
						GF_DOMText *t = ((SVG_Element*)com->node)->children ? (GF_DOMText*) ((SVG_Element*)com->node)->children->node :NULL; 
						if (t && (t->sgprivate->tag==TAG_DOMText)) {
							if (t->textContent) free(t->textContent);
							t->textContent = NULL;
							if (str) t->textContent = strdup(str);
						}
					} else {
						if (str) gf_dom_add_text_node(com->node, strdup(str));
					}
				}
				else if ((inf->fieldIndex==TAG_LSR_ATT_scale) 
					|| (inf->fieldIndex==TAG_LSR_ATT_translation)
					|| (inf->fieldIndex==TAG_LSR_ATT_rotation)
				) {
					SVG_Transform *mx;
					gf_svg_get_attribute_by_tag(com->node, TAG_SVG_ATT_transform, 1, 0, &a);
					mx = a.far_ptr;
					if (com->tag == GF_SG_LSR_REPLACE) {
						GF_Point2D scale, translate;
						SVG_Point_Angle rotate;
						if (gf_mx2d_decompose(&mx->mat, &scale, &rotate.angle, &translate)) {
							gf_mx2d_init(mx->mat);
							if (inf->fieldIndex==TAG_LSR_ATT_scale) scale = *(GF_Point2D *)inf->field_ptr;
							else if (inf->fieldIndex==TAG_LSR_ATT_translation) translate = *(GF_Point2D *)inf->field_ptr;
							else if (inf->fieldIndex==TAG_LSR_ATT_rotation) rotate = *(SVG_Point_Angle*)inf->field_ptr;

							gf_mx2d_add_scale(&mx->mat, scale.x, scale.y);
							gf_mx2d_add_rotation(&mx->mat, 0, 0, rotate.angle);
							gf_mx2d_add_translation(&mx->mat, translate.x, translate.y);
						}
					} else {
						if (inf->fieldIndex==TAG_LSR_ATT_scale) gf_mx2d_add_scale(&mx->mat, ((GF_Point2D*)inf->field_ptr)->x, ((GF_Point2D*)inf->field_ptr)->y);
						if (inf->fieldIndex==TAG_LSR_ATT_translation) gf_mx2d_add_translation(&mx->mat, ((GF_Point2D*)inf->field_ptr)->x, ((GF_Point2D*)inf->field_ptr)->y);
						if (inf->fieldIndex==TAG_LSR_ATT_rotation) gf_mx2d_add_rotation(&mx->mat, 0, 0, ((SVG_Point_Angle*)inf->field_ptr)->angle);
					}
				}
				else if (gf_svg_get_attribute_by_tag(com->node, inf->fieldIndex, 1, 0, &a) == GF_OK) {
					b = a;
					b.far_ptr = inf->field_ptr;
					if (com->tag == GF_SG_LSR_REPLACE) {
						gf_svg_attributes_copy(&a, &b, 0);
					} else {
						gf_svg_attributes_add(&a, &b, &a, 0);
					}
				}
				b = a;
				b.far_ptr = inf->field_ptr;
			}
			/*signal node modif*/
			gf_node_changed(com->node, &a);
		} else if (com->fromNodeID) {
			GF_FieldInfo a, b;
			GF_Node *fromNode = gf_sg_find_node(graph, com->fromNodeID);
			if (!fromNode) return GF_NON_COMPLIANT_BITSTREAM;
			if (gf_node_get_field(fromNode, com->fromFieldIndex, &b) != GF_OK) return GF_NON_COMPLIANT_BITSTREAM;

			if ((inf->fieldIndex==(u32) -1) && (inf->fieldType==SVG_String_datatype)) {
				char *str = *(SVG_String*)inf->field_ptr;

				if (com->tag == GF_SG_LSR_REPLACE) {
					GF_DOMText *t = ((SVG_Element*)com->node)->children ? (GF_DOMText*) ((SVG_Element*)com->node)->children->node :NULL; 
					if (t && (t->sgprivate->tag==TAG_DOMText)) {
						if (t->textContent) free(t->textContent);
						t->textContent = NULL;
						if (str) t->textContent = strdup(str);
					}
				} else {
					if (str) gf_dom_add_text_node(com->node, strdup(str));
				}
			} else {
				gf_node_get_field(com->node, inf->fieldIndex, &a);
				if (com->tag == GF_SG_LSR_REPLACE) {
					e = gf_svg_attributes_copy(&a, &b, 0);
				} else {
					e = gf_svg_attributes_add(&a, &b, &a, 0);
				}
			}
			gf_node_changed(com->node, &a);
			return e;
		} else {
			return GF_NON_COMPLIANT_BITSTREAM;
		}
		break;
	case GF_SG_LSR_ACTIVATE:
		gf_node_activate(com->node);
		break;
	case GF_SG_LSR_DEACTIVATE:
		gf_node_deactivate(com->node);
		gf_node_changed(com->node, NULL);
		break;
#endif

	default:
		return GF_NOT_SUPPORTED;
	}
	if (e) return e;

	if (com->scripts_to_load) {
		while (gf_list_count(com->scripts_to_load)) {
			GF_Node *script = (GF_Node *)gf_list_get(com->scripts_to_load, 0);
			gf_list_rem(com->scripts_to_load, 0);
			gf_sg_script_load(script);
		}
		gf_list_del(com->scripts_to_load);
		com->scripts_to_load = NULL;
	}
	return GF_OK;
}
Ejemplo n.º 2
0
GF_Err gf_sr_set_scene(GF_Renderer *sr, GF_SceneGraph *scene_graph)
{
	u32 width, height;
	Bool do_notif;

	if (!sr) return GF_BAD_PARAM;

	gf_sr_lock(sr, 1);
	GF_LOG(GF_LOG_DEBUG, GF_LOG_RENDER, (scene_graph ? "[Render] Attaching new scene\n" : "[Render] Detaching scene\n"));

	if (sr->audio_renderer && (sr->scene != scene_graph)) {
		GF_LOG(GF_LOG_DEBUG, GF_LOG_RENDER, ("[Render] Reseting audio render\n"));
		gf_sr_ar_reset(sr->audio_renderer);
	}

#ifdef GF_SR_EVENT_QUEUE
	GF_LOG(GF_LOG_DEBUG, GF_LOG_RENDER, ("[Render] Reseting event queue\n"));
	gf_mx_p(sr->ev_mx);
	while (gf_list_count(sr->events)) {
		GF_Event *ev = (GF_Event*)gf_list_get(sr->events, 0);
		gf_list_rem(sr->events, 0);
		free(ev);
	}
#endif
	
	GF_LOG(GF_LOG_DEBUG, GF_LOG_RENDER, ("[Render] Reseting render module\n"));
	/*reset main surface*/
	sr->visual_renderer->SceneReset(sr->visual_renderer);

	/*set current graph*/
	sr->scene = scene_graph;
	do_notif = 0;
	if (scene_graph) {
#ifndef GPAC_DISABLE_SVG
		SVG_Length *w, *h;
#endif
		const char *opt;
		Bool is_svg = 0;
		u32 tag;
		GF_Node *top_node;
		Bool had_size_info = sr->has_size_info;
		/*get pixel size if any*/
		gf_sg_get_scene_size_info(sr->scene, &width, &height);
		sr->has_size_info = (width && height) ? 1 : 0;
		if (sr->has_size_info != had_size_info) sr->scene_width = sr->scene_height = 0;

		/*default back color is black*/
		if (! (sr->user->init_flags & GF_TERM_WINDOWLESS)) sr->back_color = 0xFF000000;

		top_node = gf_sg_get_root_node(sr->scene);
		tag = 0;
		if (top_node) tag = gf_node_get_tag(top_node);

#ifndef GPAC_DISABLE_SVG
		w = h = NULL;
		if ((tag>=GF_NODE_RANGE_FIRST_SVG) && (tag<=GF_NODE_RANGE_LAST_SVG)) {
			GF_FieldInfo info;
			is_svg = 1;
			if (gf_svg_get_attribute_by_tag(top_node, TAG_SVG_ATT_width, 0, 0, &info)==GF_OK) 
				w = info.far_ptr;
			if (gf_svg_get_attribute_by_tag(top_node, TAG_SVG_ATT_height, 0, 0, &info)==GF_OK) 
				h = info.far_ptr;
		}
#ifdef GPAC_ENABLE_SVG_SA
		else if ((tag>=GF_NODE_RANGE_FIRST_SVG_SA) && (tag<=GF_NODE_RANGE_LAST_SVG_SA)) {
			SVG_SA_svgElement *root = (SVG_SA_svgElement *) top_node;
			is_svg = 1;
			w = &root->width;
			h = &root->height;
		}
#endif
#ifdef GPAC_ENABLE_SVG_SANI
		else if ((tag>=GF_NODE_RANGE_FIRST_SVG_SANI) && (tag<=GF_NODE_RANGE_LAST_SVG_SANI)) {
			SVG_SANI_svgElement *root = (SVG_SANI_svgElement*) top_node;
			is_svg = 1;
			w = &root->width;
			h = &root->height;
		}
#endif
		/*default back color is white*/
		if (is_svg && ! (sr->user->init_flags & GF_TERM_WINDOWLESS)) sr->back_color = 0xFFFFFFFF;

		/*hack for SVG where size is set in %*/
		if (!sr->has_size_info && w && h) {
			sr->has_size_info = 1;
			sr->aspect_ratio = GF_ASPECT_RATIO_FILL_SCREEN;
			if (w->type!=SVG_NUMBER_PERCENTAGE) {
				width = FIX2INT(convert_svg_length_to_user(sr, w) );
			} else {
				width = 320; //FIX2INT(root->viewBox.width);
			}
			if (h->type!=SVG_NUMBER_PERCENTAGE) {
				height = FIX2INT(convert_svg_length_to_user(sr, h) );
			} else {
				height = 240; //FIX2INT(root->viewBox.height);
			}
		}
#endif
		/*default back color is key color*/
		if (sr->user->init_flags & GF_TERM_WINDOWLESS) {
			opt = gf_cfg_get_key(sr->user->config, "Rendering", "ColorKey");
			if (opt) {
				u32 r, g, b, a;
				sscanf(opt, "%02X%02X%02X%02X", &a, &r, &g, &b);
				sr->back_color = GF_COL_ARGB(0xFF, r, g, b);
			}
		}

		/*set scene size only if different, otherwise keep scaling/FS*/
		if ( !width || (sr->scene_width!=width) || !height || (sr->scene_height!=height)) {
			do_notif = sr->has_size_info || (!sr->scene_width && !sr->scene_height);
			SR_SetSceneSize(sr, width, height);

			/*get actual size in pixels*/
			width = sr->scene_width;
			height = sr->scene_height;

			if (!sr->user->os_window_handler) {
				/*only notify user if we are attached to a window*/
				do_notif = 0;
				if (sr->video_out->max_screen_width && (width > sr->video_out->max_screen_width))
					width = sr->video_out->max_screen_width;
				if (sr->video_out->max_screen_height && (height > sr->video_out->max_screen_height))
					height = sr->video_out->max_screen_height;

				gf_sr_set_size(sr,width, height);
			}
		}
	}

	SR_ResetFrameRate(sr);	
#ifdef GF_SR_EVENT_QUEUE
	gf_mx_v(sr->ev_mx);
#endif
	
	gf_sr_lock(sr, 0);
	/*here's a nasty trick: the app may respond to this by calling a gf_sr_set_size from a different
	thread, but in an atomic way (typically happen on Win32 when changing the window size). WE MUST
	NOTIFY THE SIZE CHANGE AFTER RELEASING THE RENDERER MUTEX*/
	if (do_notif && sr->user->EventProc) {
		GF_Event evt;
		evt.type = GF_EVENT_SCENE_SIZE;
		evt.size.width = width;
		evt.size.height = height;
		sr->user->EventProc(sr->user->opaque, &evt);
	}
	if (scene_graph)
		sr->draw_next_frame = 1;
	return GF_OK;
}