Ability to update parts of an array, and set arrays as dynamic draw

10 files changed, 42 insertions, 516 deletions

diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 296d945cda..5071fbba01 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -2866,7 +2866,7 @@ void RasterizerStorageGLES3::mesh_add_surface(RID p_mesh, uint32_t p_format, VS:
 
 		glGenBuffers(1, &surface->vertex_id);
 		glBindBuffer(GL_ARRAY_BUFFER, surface->vertex_id);
-		glBufferData(GL_ARRAY_BUFFER, array_size, vr.ptr(), GL_STATIC_DRAW);
+		glBufferData(GL_ARRAY_BUFFER, array_size, vr.ptr(), p_format & VS::ARRAY_FLAG_USE_DYNAMIC_UPDATE ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
 		glBindBuffer(GL_ARRAY_BUFFER, 0); //unbind
 
 		if (p_format & VS::ARRAY_FORMAT_INDEX) {
@@ -3104,6 +3104,22 @@ VS::BlendShapeMode RasterizerStorageGLES3::mesh_get_blend_shape_mode(RID p_mesh)
 	return mesh->blend_shape_mode;
 }
 
+void RasterizerStorageGLES3::mesh_surface_update_region(RID p_mesh, int p_surface, int p_offset, const PoolVector<uint8_t> &p_data) {
+
+	Mesh *mesh = mesh_owner.getornull(p_mesh);
+	ERR_FAIL_COND(!mesh);
+	ERR_FAIL_INDEX(p_surface, mesh->surfaces.size());
+
+	int total_size = p_data.size();
+	ERR_FAIL_COND(p_offset + total_size > mesh->surfaces[p_surface]->array_byte_size);
+
+	PoolVector<uint8_t>::Read r = p_data.read();
+
+	glBindBuffer(GL_ARRAY_BUFFER, mesh->surfaces[p_surface]->array_id);
+	glBufferSubData(GL_ARRAY_BUFFER, p_offset, total_size, r.ptr());
+	glBindBuffer(GL_ARRAY_BUFFER, 0); //unbind
+}
+
 void RasterizerStorageGLES3::mesh_surface_set_material(RID p_mesh, int p_surface, RID p_material) {
 
 	Mesh *mesh = mesh_owner.getornull(p_mesh);
diff --git a/drivers/gles3/rasterizer_storage_gles3.h b/drivers/gles3/rasterizer_storage_gles3.h
index 6abc22b643..bd5aad29c9 100644
--- a/drivers/gles3/rasterizer_storage_gles3.h
+++ b/drivers/gles3/rasterizer_storage_gles3.h
@@ -692,6 +692,8 @@ public:
 	virtual void mesh_set_blend_shape_mode(RID p_mesh, VS::BlendShapeMode p_mode);
 	virtual VS::BlendShapeMode mesh_get_blend_shape_mode(RID p_mesh) const;
 
+	virtual void mesh_surface_update_region(RID p_mesh, int p_surface, int p_offset, const PoolVector<uint8_t> &p_data);
+
 	virtual void mesh_surface_set_material(RID p_mesh, int p_surface, RID p_material);
 	virtual RID mesh_surface_get_material(RID p_mesh, int p_surface) const;
 
diff --git a/scene/resources/mesh.cpp b/scene/resources/mesh.cpp
index 26f5deae1d..3e86daf3a7 100644
--- a/scene/resources/mesh.cpp
+++ b/scene/resources/mesh.cpp
@@ -920,6 +920,12 @@ String ArrayMesh::surface_get_name(int p_idx) const {
 	return surfaces[p_idx].name;
 }
 
+void ArrayMesh::surface_update_region(int p_surface, int p_offset, const PoolVector<uint8_t> &p_data) {
+
+	ERR_FAIL_INDEX(p_surface, surfaces.size());
+	VS::get_singleton()->mesh_surface_update_region(mesh, p_surface, p_offset, p_data);
+}
+
 void ArrayMesh::surface_set_custom_aabb(int p_idx, const Rect3 &p_aabb) {
 
 	ERR_FAIL_INDEX(p_idx, surfaces.size());
@@ -1041,6 +1047,7 @@ void ArrayMesh::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("add_surface_from_arrays", "primitive", "arrays", "blend_shapes", "compress_flags"), &ArrayMesh::add_surface_from_arrays, DEFVAL(Array()), DEFVAL(ARRAY_COMPRESS_DEFAULT));
 	ClassDB::bind_method(D_METHOD("get_surface_count"), &ArrayMesh::get_surface_count);
 	ClassDB::bind_method(D_METHOD("surface_remove", "surf_idx"), &ArrayMesh::surface_remove);
+	ClassDB::bind_method(D_METHOD("surface_update_region", "surf_idx", "offset", "data"), &ArrayMesh::surface_update_region);
 	ClassDB::bind_method(D_METHOD("surface_get_array_len", "surf_idx"), &ArrayMesh::surface_get_array_len);
 	ClassDB::bind_method(D_METHOD("surface_get_array_index_len", "surf_idx"), &ArrayMesh::surface_get_array_index_len);
 	ClassDB::bind_method(D_METHOD("surface_get_format", "surf_idx"), &ArrayMesh::surface_get_format);
diff --git a/scene/resources/mesh.h b/scene/resources/mesh.h
index b11adf50b9..75927079c7 100644
--- a/scene/resources/mesh.h
+++ b/scene/resources/mesh.h
@@ -95,6 +95,7 @@ public:
 
 		ARRAY_FLAG_USE_2D_VERTICES = ARRAY_COMPRESS_INDEX << 1,
 		ARRAY_FLAG_USE_16_BIT_BONES = ARRAY_COMPRESS_INDEX << 2,
+		ARRAY_FLAG_USE_DYNAMIC_UPDATE = ARRAY_COMPRESS_INDEX << 3,
 
 		ARRAY_COMPRESS_DEFAULT = ARRAY_COMPRESS_VERTEX | ARRAY_COMPRESS_NORMAL | ARRAY_COMPRESS_TANGENT | ARRAY_COMPRESS_COLOR | ARRAY_COMPRESS_TEX_UV | ARRAY_COMPRESS_TEX_UV2 | ARRAY_COMPRESS_WEIGHTS
 
@@ -185,6 +186,8 @@ public:
 	void set_blend_shape_mode(BlendShapeMode p_mode);
 	BlendShapeMode get_blend_shape_mode() const;
 
+	void surface_update_region(int p_surface, int p_offset, const PoolVector<uint8_t> &p_data);
+
 	int get_surface_count() const;
 	void surface_remove(int p_idx);
 
diff --git a/servers/visual/rasterizer.h b/servers/visual/rasterizer.h
index 164baa8c9b..333fe1e72a 100644
--- a/servers/visual/rasterizer.h
+++ b/servers/visual/rasterizer.h
@@ -242,6 +242,8 @@ public:
 	virtual void mesh_set_blend_shape_mode(RID p_mesh, VS::BlendShapeMode p_mode) = 0;
 	virtual VS::BlendShapeMode mesh_get_blend_shape_mode(RID p_mesh) const = 0;
 
+	virtual void mesh_surface_update_region(RID p_mesh, int p_surface, int p_offset, const PoolVector<uint8_t> &p_data) = 0;
+
 	virtual void mesh_surface_set_material(RID p_mesh, int p_surface, RID p_material) = 0;
 	virtual RID mesh_surface_get_material(RID p_mesh, int p_surface) const = 0;
 
diff --git a/servers/visual/visual_server_raster.cpp b/servers/visual/visual_server_raster.cpp
index 69e2d1c162..9432d3fdd9 100644
--- a/servers/visual/visual_server_raster.cpp
+++ b/servers/visual/visual_server_raster.cpp
@@ -120,6 +120,8 @@ void VisualServerRaster::draw() {
 
 		frame_drawn_callbacks.pop_front();
 	}
+
+	emit_signal("frame_drawn_in_thread");
 }
 void VisualServerRaster::sync() {
 }
diff --git a/servers/visual/visual_server_raster.h b/servers/visual/visual_server_raster.h
index b579f4032f..67375e81b6 100644
--- a/servers/visual/visual_server_raster.h
+++ b/servers/visual/visual_server_raster.h
@@ -73,521 +73,6 @@ class VisualServerRaster : public VisualServer {
 
 	List<FrameDrawnCallbacks> frame_drawn_callbacks;
 
-// FIXME: Kept as reference for future implementation
-#if 0
-	struct Room {
-
-		bool occlude_exterior;
-		BSP_Tree bounds;
-		Room() { occlude_exterior=true; }
-	};
-
-
-	BalloonAllocator<> octree_allocator;
-
-	struct OctreeAllocator {
-
-		static BalloonAllocator<> *allocator;
-
-		_FORCE_INLINE_ static void *alloc(size_t p_size) { return allocator->alloc(p_size); }
-		_FORCE_INLINE_ static void free(void *p_ptr) { return allocator->free(p_ptr); }
-
-	};
-
-	struct Portal {
-
-		bool enabled;
-		float disable_distance;
-		Color disable_color;
-		float connect_range;
-		Vector<Point2> shape;
-		Rect2 bounds;
-
-
-		Portal() { enabled=true; disable_distance=50; disable_color=Color(); connect_range=0.8; }
-	};
-
-	struct BakedLight {
-
-		Rasterizer::BakedLightData data;
-		PoolVector<int> sampler;
-		Rect3 octree_aabb;
-		Size2i octree_tex_size;
-		Size2i light_tex_size;
-
-	};
-
-	struct BakedLightSampler {
-
-		float params[BAKED_LIGHT_SAMPLER_MAX];
-		int resolution;
-		Vector<Vector3> dp_cache;
-
-		BakedLightSampler() {
-			params[BAKED_LIGHT_SAMPLER_STRENGTH]=1.0;
-			params[BAKED_LIGHT_SAMPLER_ATTENUATION]=1.0;
-			params[BAKED_LIGHT_SAMPLER_RADIUS]=1.0;
-			params[BAKED_LIGHT_SAMPLER_DETAIL_RATIO]=0.1;
-			resolution=16;
-		}
-	};
-
-	void _update_baked_light_sampler_dp_cache(BakedLightSampler * blsamp);
-	struct Camera  {
-
-		enum Type {
-			PERSPECTIVE,
-			ORTHOGONAL
-		};
-		Type type;
-		float fov;
-		float znear,zfar;
-		float size;
-		uint32_t visible_layers;
-		bool vaspect;
-		RID env;
-
-		Transform transform;
-
-		Camera() {
-
-			visible_layers=0xFFFFFFFF;
-			fov=60;
-			type=PERSPECTIVE;
-			znear=0.1; zfar=100;
-			size=1.0;
-			vaspect=false;
-
-		}
-	};
-
-
-	struct Instance;
-	typedef Set<Instance*,Comparator<Instance*>,OctreeAllocator> InstanceSet;
-	struct Scenario;
-
-	struct Instance {
-
-		enum {
-
-			MAX_LIGHTS=4
-		};
-
-		RID self;
-		OctreeElementID octree_id;
-		Scenario *scenario;
-		bool update;
-		bool update_aabb;
-		bool update_materials;
-		Instance *update_next;
-		InstanceType base_type;
-
-		RID base_rid;
-
-		Rect3 aabb;
-		Rect3 transformed_aabb;
-		uint32_t object_ID;
-		bool visible;
-		bool visible_in_all_rooms;
-		uint32_t layer_mask;
-		float draw_range_begin;
-		float draw_range_end;
-		float extra_margin;
-
-
-
-		Rasterizer::InstanceData data;
-
-
-		Set<Instance*> auto_rooms;
-		Set<Instance*> valid_auto_rooms;
-		Instance *room;
-		List<Instance*>::Element *RE;
-		Instance *baked_light;
-		List<Instance*>::Element *BLE;
-		Instance *sampled_light;
-		bool exterior;
-
-		uint64_t last_render_pass;
-		uint64_t last_frame_pass;
-
-		uint64_t version; // changes to this, and changes to base increase version
-
-		InstanceSet lights;
-		bool light_cache_dirty;
-
-
-
-		struct RoomInfo {
-
-			Transform affine_inverse;
-			Room *room;
-			List<Instance*> owned_geometry_instances;
-			List<Instance*> owned_portal_instances;
-			List<Instance*> owned_room_instances;
-			List<Instance*> owned_light_instances; //not used, but just for the sake of it
-			Set<Instance*> disconnected_child_portals;
-			Set<Instance*> owned_autoroom_geometry;
-			uint64_t last_visited_pass;
-			RoomInfo() { last_visited_pass=0; }
-
-		};
-
-		struct PortalInfo {
-
-			Portal *portal;
-			Set<Instance*> candidate_set;
-			Instance *connected;
-			uint64_t last_visited_pass;
-
-			Plane plane_cache;
-			Vector<Vector3> transformed_point_cache;
-
-
-			PortalInfo() { connected=NULL; last_visited_pass=0;}
-		};
-
-		struct LightInfo {
-
-			RID instance;
-			int light_set_index;
-			uint64_t last_version;
-			uint64_t last_add_pass;
-			List<RID>::Element *D; // directional light in scenario
-			InstanceSet affected;
-			bool enabled;
-			float dtc; //distance to camera, used for sorting
-
-
-			LightInfo() {
-
-				D=NULL;
-				light_set_index=-1;
-				last_add_pass=0;
-				enabled=true;
-			}
-		};
-
-		struct BakedLightInfo {
-
-			BakedLight *baked_light;
-			Transform affine_inverse;
-			List<Instance*> owned_instances;
-		};
-
-		struct BakedLightSamplerInfo {
-
-			Set<Instance*> baked_lights;
-			Set<Instance*> owned_instances;
-			BakedLightSampler *sampler;
-			int resolution;
-			Vector<Color> light_buffer;
-			RID sampled_light;
-			uint64_t last_pass;
-			Transform xform; // viewspace normal to lightspace, might not use one.
-			BakedLightSamplerInfo() {
-				sampler=NULL;
-				last_pass=0;
-				resolution=0;
-			}
-		};
-
-		struct ParticlesInfo {
-
-			RID instance;
-		};
-
-
-		RoomInfo *room_info;
-		LightInfo *light_info;
-		ParticlesInfo *particles_info;
-		PortalInfo * portal_info;
-		BakedLightInfo * baked_light_info;
-		BakedLightSamplerInfo * baked_light_sampler_info;
-
-
-		Instance() {
-			octree_id=0;
-			update_next=0;
-			object_ID=0;
-			last_render_pass=0;
-			last_frame_pass=0;
-			light_info=0;
-			particles_info=0;
-			update_next=NULL;
-			update=false;
-			visible=true;
-			data.cast_shadows=SHADOW_CASTING_SETTING_ON;
-			data.receive_shadows=true;
-			data.depth_scale=false;
-			data.billboard=false;
-			data.billboard_y=false;
-			data.baked_light=NULL;
-			data.baked_light_octree_xform=NULL;
-			data.baked_lightmap_id=-1;
-			version=1;
-			room_info=NULL;
-			room=NULL;
-			RE=NULL;
-			portal_info=NULL;
-			exterior=false;
-			layer_mask=1;
-			draw_range_begin=0;
-			draw_range_end=0;
-			extra_margin=0;
-			visible_in_all_rooms=false;
-			update_aabb=false;
-			update_materials=false;
-
-			baked_light=NULL;
-			baked_light_info=NULL;
-			baked_light_sampler_info=NULL;
-			sampled_light=NULL;
-			BLE=NULL;
-
-			light_cache_dirty=true;
-
-		}
-
-		~Instance() {
-
-			if (light_info)
-				memdelete(light_info);
-			if (particles_info)
-				memdelete(particles_info);
-			if (room_info)
-				memdelete(room_info);
-			if (portal_info)
-				memdelete(portal_info);
-			if (baked_light_info)
-				memdelete(baked_light_info);
-		};
-	};
-
-	struct _InstanceLightsort {
-
-		bool operator()(const Instance* p_A, const Instance* p_B) const { return p_A->light_info->dtc < p_B->light_info->dtc; }
-	};
-
-	struct Scenario {
-
-
-		ScenarioDebugMode debug;
-		RID self;
-		// well wtf, balloon allocator is slower?
-		typedef ::Octree<Instance,true> Octree;
-
-		Octree octree;
-
-		List<RID> directional_lights;
-		RID environment;
-		RID fallback_environment;
-
-		Instance *dirty_instances;
-
-		Scenario() { dirty_instances=NULL; debug=SCENARIO_DEBUG_DISABLED; }
-	};
-
-
-
-	mutable RID_Owner<Rasterizer::ShaderMaterial> canvas_item_material_owner;
-
-
-
-	struct Viewport {
-
-		RID self;
-		RID parent;
-
-		VisualServer::ViewportRect rect;
-		RID camera;
-		RID scenario;
-		RID viewport_data;
-
-		RenderTargetUpdateMode render_target_update_mode;
-		RID render_target;
-		RID render_target_texture;
-
-		Rect2 rt_to_screen_rect;
-
-		bool hide_scenario;
-		bool hide_canvas;
-		bool transparent_bg;
-		bool queue_capture;
-		bool render_target_vflip;
-		bool render_target_clear_on_new_frame;
-		bool render_target_clear;
-		bool disable_environment;
-
-		Image capture;
-
-		bool rendered_in_prev_frame;
-
-		struct CanvasKey {
-
-			int layer;
-			RID canvas;
-			bool operator<(const CanvasKey& p_canvas) const { if (layer==p_canvas.layer) return canvas < p_canvas.canvas; return layer<p_canvas.layer; }
-			CanvasKey() { layer=0; }
-			CanvasKey(const RID& p_canvas, int p_layer) { canvas=p_canvas; layer=p_layer; }
-		};
-
-		struct CanvasData {
-
-			Canvas *canvas;
-			Transform2D transform;
-			int layer;
-		};
-
-		Transform2D global_transform;
-
-		Map<RID,CanvasData> canvas_map;
-
-		SelfList<Viewport> update_list;
-
-		Viewport() : update_list(this) { transparent_bg=false; render_target_update_mode=RENDER_TARGET_UPDATE_WHEN_VISIBLE; queue_capture=false; rendered_in_prev_frame=false; render_target_vflip=false; render_target_clear_on_new_frame=true; render_target_clear=true; disable_environment=false; }
-	};
-
-	SelfList<Viewport>::List viewport_update_list;
-
-	Map<RID,int> screen_viewports;
-
-	struct CullRange {
-
-		Plane nearp;
-		float min,max;
-		float z_near,z_far;
-
-		void add_aabb(const Rect3& p_aabb) {
-
-
-		}
-	};
-
-	struct Cursor {
-
-		Point2 pos;
-		float rot;
-		RID texture;
-		Point2 center;
-		bool visible;
-		Rect2 region;
-		Cursor() {
-
-			rot = 0;
-			visible = false;
-			region = Rect2();
-		};
-	};
-
-	Rect2 canvas_clip;
-	Color clear_color;
-	Cursor cursors[MAX_CURSORS];
-	RID default_cursor_texture;
-
-	static void* instance_pair(void *p_self, OctreeElementID,Instance *p_A,int, OctreeElementID,Instance *p_B,int);
-	static void instance_unpair(void *p_self, OctreeElementID,Instance *p_A,int, OctreeElementID,Instance *p_B,int,void*);
-
-	Instance *instance_cull_result[MAX_INSTANCE_CULL];
-	Instance *instance_shadow_cull_result[MAX_INSTANCE_CULL]; //used for generating shadowmaps
-	Instance *light_cull_result[MAX_LIGHTS_CULLED];
-	int light_cull_count;
-
-	Instance *exterior_portal_cull_result[MAX_EXTERIOR_PORTALS];
-	int exterior_portal_cull_count;
-	bool exterior_visited;
-
-	Instance *light_sampler_cull_result[MAX_LIGHT_SAMPLERS];
-	int light_samplers_culled;
-
-	Instance *room_cull_result[MAX_ROOM_CULL];
-	int room_cull_count;
-	bool room_cull_enabled;
-	bool light_discard_enabled;
-	bool shadows_enabled;
-	int black_margin[4];
-	RID black_image[4];
-
-	Vector<Vector3> aabb_random_points;
-	Vector<Vector3> transformed_aabb_random_points;
-
-	void _instance_validate_autorooms(Instance *p_geometry);
-
-	void _portal_disconnect(Instance *p_portal,bool p_cleanup=false);
-	void _portal_attempt_connect(Instance *p_portal);
-	void _dependency_queue_update(RID p_rid, bool p_update_aabb=false, bool p_update_materials=false);
-	_FORCE_INLINE_ void _instance_queue_update(Instance *p_instance,bool p_update_aabb=false,bool p_update_materials=false);
-	void _update_instances();
-	void _update_instance_aabb(Instance *p_instance);
-	void _update_instance(Instance *p_instance);
-	void _free_attached_instances(RID p_rid,bool p_free_scenario=false);
-	void _clean_up_owner(RID_OwnerBase *p_owner,String p_type);
-
-	Instance *instance_update_list;
-
-	//RID default_scenario;
-	//RID default_viewport;
-
-	RID test_cube;
-
-
-	mutable RID_Owner<Room> room_owner;
-	mutable RID_Owner<Portal> portal_owner;
-
-	mutable RID_Owner<BakedLight> baked_light_owner;
-	mutable RID_Owner<BakedLightSampler> baked_light_sampler_owner;
-
-	mutable RID_Owner<Camera> camera_owner;
-	mutable RID_Owner<Viewport> viewport_owner;
-
-	mutable RID_Owner<Scenario> scenario_owner;
-	mutable RID_Owner<Instance> instance_owner;
-
-	mutable RID_Owner<Canvas> canvas_owner;
-	mutable RID_Owner<CanvasItem> canvas_item_owner;
-
-	Map< RID, Set<RID> > instance_dependency_map;
-	Map< RID, Set<Instance*> > skeleton_dependency_map;
-
-
-	ViewportRect viewport_rect;
-	_FORCE_INLINE_ void _instance_draw(Instance *p_instance);
-
-	bool _test_portal_cull(Camera *p_camera, Instance *p_portal_from, Instance *p_portal_to);
-	void _cull_portal(Camera *p_camera, Instance *p_portal,Instance *p_from_portal);
-	void _cull_room(Camera *p_camera, Instance *p_room,Instance *p_from_portal=NULL);
-	void _process_sampled_light(const Transform &p_camera, Instance *p_sampled_light, bool p_linear_colorspace);
-
-	void _render_no_camera(Viewport *p_viewport,Camera *p_camera, Scenario *p_scenario);
-	void _render_camera(Viewport *p_viewport,Camera *p_camera, Scenario *p_scenario);
-	static void _render_canvas_item_viewport(VisualServer* p_self,void *p_vp,const Rect2& p_rect);
-	void _render_canvas_item_tree(CanvasItem *p_canvas_item, const Transform2D& p_transform, const Rect2& p_clip_rect, const Color &p_modulate, Rasterizer::CanvasLight *p_lights);
-	void _render_canvas_item(CanvasItem *p_canvas_item, const Transform2D& p_transform, const Rect2& p_clip_rect, float p_opacity, int p_z, Rasterizer::CanvasItem **z_list, Rasterizer::CanvasItem **z_last_list, CanvasItem *p_canvas_clip, CanvasItem *p_material_owner);
-	void _render_canvas(Canvas *p_canvas, const Transform2D &p_transform, Rasterizer::CanvasLight *p_lights, Rasterizer::CanvasLight *p_masked_lights);
-	void _light_mask_canvas_items(int p_z,Rasterizer::CanvasItem *p_canvas_item,Rasterizer::CanvasLight *p_masked_lights);
-
-	Vector<Vector3> _camera_generate_endpoints(Instance *p_light,Camera *p_camera,float p_range_min, float p_range_max);
-	Vector<Plane> _camera_generate_orthogonal_planes(Instance *p_light,Camera *p_camera,float p_range_min, float p_range_max);
-
-	void _light_instance_update_lispsm_shadow(Instance *p_light,Scenario *p_scenario,Camera *p_camera,const CullRange& p_cull_range);
-	void _light_instance_update_pssm_shadow(Instance *p_light,Scenario *p_scenario,Camera *p_camera,const CullRange& p_cull_range);
-
-	void _light_instance_update_shadow(Instance *p_light,Scenario *p_scenario,Camera *p_camera,const CullRange& p_cull_range);
-
-	uint64_t render_pass;
-	int changes;
-	bool draw_extra_frame;
-
-	void _draw_viewport_camera(Viewport *p_viewport, bool p_ignore_camera);
-	void _draw_viewport(Viewport *p_viewport,int p_ofs_x, int p_ofs_y,int p_parent_w,int p_parent_h);
-	void _draw_viewports();
-	void _draw_cursors_and_margins();
-
-
-	Rasterizer *rasterizer;
-
-#endif
-
 	void _draw_margins();
 	static void _changes_changed() {}
 
@@ -726,6 +211,8 @@ public:
 	BIND2(mesh_set_blend_shape_mode, RID, BlendShapeMode)
 	BIND1RC(BlendShapeMode, mesh_get_blend_shape_mode, RID)
 
+	BIND4(mesh_surface_update_region, RID, int, int, const PoolVector<uint8_t> &)
+
 	BIND3(mesh_surface_set_material, RID, int, RID)
 	BIND2RC(RID, mesh_surface_get_material, RID, int)
 
diff --git a/servers/visual/visual_server_wrap_mt.h b/servers/visual/visual_server_wrap_mt.h
index 80a1ef3879..1dddef7bd4 100644
--- a/servers/visual/visual_server_wrap_mt.h
+++ b/servers/visual/visual_server_wrap_mt.h
@@ -144,6 +144,8 @@ public:
 	FUNC2(mesh_set_blend_shape_mode, RID, BlendShapeMode)
 	FUNC1RC(BlendShapeMode, mesh_get_blend_shape_mode, RID)
 
+	FUNC4(mesh_surface_update_region, RID, int, int, const PoolVector<uint8_t> &)
+
 	FUNC3(mesh_surface_set_material, RID, int, RID)
 	FUNC2RC(RID, mesh_surface_get_material, RID, int)
 
diff --git a/servers/visual_server.cpp b/servers/visual_server.cpp
index 2234ddda0d..039bbedbcc 100644
--- a/servers/visual_server.cpp
+++ b/servers/visual_server.cpp
@@ -1856,6 +1856,8 @@ void VisualServer::_bind_methods() {
 
 	BIND_ENUM_CONSTANT(FEATURE_SHADERS);
 	BIND_ENUM_CONSTANT(FEATURE_MULTITHREADED);
+
+	ADD_SIGNAL(MethodInfo("frame_drawn_in_thread"));
 }
 
 void VisualServer::_canvas_item_add_style_box(RID p_item, const Rect2 &p_rect, const Rect2 &p_source, RID p_texture, const Vector<float> &p_margins, const Color &p_modulate) {
diff --git a/servers/visual_server.h b/servers/visual_server.h
index 7b0976b100..a36ba4a50a 100644
--- a/servers/visual_server.h
+++ b/servers/visual_server.h
@@ -227,6 +227,7 @@ public:
 
 		ARRAY_FLAG_USE_2D_VERTICES = ARRAY_COMPRESS_INDEX << 1,
 		ARRAY_FLAG_USE_16_BIT_BONES = ARRAY_COMPRESS_INDEX << 2,
+		ARRAY_FLAG_USE_DYNAMIC_UPDATE = ARRAY_COMPRESS_INDEX << 3,
 
 		ARRAY_COMPRESS_DEFAULT = ARRAY_COMPRESS_VERTEX | ARRAY_COMPRESS_NORMAL | ARRAY_COMPRESS_TANGENT | ARRAY_COMPRESS_COLOR | ARRAY_COMPRESS_TEX_UV | ARRAY_COMPRESS_TEX_UV2 | ARRAY_COMPRESS_WEIGHTS
 
@@ -259,6 +260,8 @@ public:
 	virtual void mesh_set_blend_shape_mode(RID p_mesh, BlendShapeMode p_mode) = 0;
 	virtual BlendShapeMode mesh_get_blend_shape_mode(RID p_mesh) const = 0;
 
+	virtual void mesh_surface_update_region(RID p_mesh, int p_surface, int p_offset, const PoolVector<uint8_t> &p_data) = 0;
+
 	virtual void mesh_surface_set_material(RID p_mesh, int p_surface, RID p_material) = 0;
 	virtual RID mesh_surface_get_material(RID p_mesh, int p_surface) const = 0;