support for light and normal mapping in 2D

5 files changed, 175 insertions, 51 deletions

diff --git a/servers/visual/rasterizer.h b/servers/visual/rasterizer.h
index 63ebdbc34a..2ae283f3b7 100644
--- a/servers/visual/rasterizer.h
+++ b/servers/visual/rasterizer.h
@@ -570,6 +570,7 @@ public:
 
 	struct CanvasLight {
 
+
 		bool enabled;
 		bool shadow;
 		Color color;
@@ -577,12 +578,23 @@ public:
 		float height;
 		int z_min;
 		int z_max;
+		int layer_min;
+		int layer_max;
 		int item_mask;
-		VS::CanvasLightBlendMode blend_mode;
+		bool subtract;
 		RID texture;
-		void *texture_cache; // implementation dependent
 		Vector2 texture_offset;
+		RID canvas;
+
+
+		void *texture_cache; // implementation dependent
+		Rect2 rect_cache;
+		Matrix32 xform_cache;
+
+		Matrix32 light_shader_xform;
+		Vector2 light_shader_pos;
 
+		CanvasLight *filter_next_ptr;
 		CanvasLight *next_ptr;
 
 		CanvasLight() {
@@ -592,10 +604,13 @@ public:
 			height=0;
 			z_min=-1024;
 			z_max=1024;
+			layer_min=0;
+			layer_max=0;
 			item_mask=1;
-			blend_mode=VS::CANVAS_LIGHT_BLEND_ADD;
+			subtract=false;
 			texture_cache=NULL;
 			next_ptr=NULL;
+			filter_next_ptr=NULL;
 		}
 	};
 
@@ -722,6 +737,7 @@ public:
 		bool visible;
 		bool ontop;
 		VS::MaterialBlendMode blend_mode;
+		int light_mask;
 		Vector<Command*> commands;
 		mutable bool custom_rect;
 		mutable bool rect_dirty;
@@ -739,8 +755,9 @@ public:
 		CanvasItem* shader_owner;
 		ViewportRender *vp_render;
 
-		const Rect2& get_rect() const {
+		Rect2 global_rect_cache;
 
+		const Rect2& get_rect() const {
 			if (custom_rect || !rect_dirty)
 				return rect;
 
@@ -864,7 +881,7 @@ public:
 		}
 
 		void clear() { for (int i=0;i<commands.size();i++) memdelete( commands[i] ); commands.clear(); clip=false; rect_dirty=true; final_clip_owner=NULL;  shader_owner=NULL;}
-		CanvasItem() { vp_render=NULL; next=NULL; final_clip_owner=NULL; clip=false; final_opacity=1;  blend_mode=VS::MATERIAL_BLEND_MODE_MIX; visible=true; rect_dirty=true; custom_rect=false; ontop=true; shader_version=0; shader_owner=NULL;}
+		CanvasItem() { light_mask=1; vp_render=NULL; next=NULL; final_clip_owner=NULL; clip=false; final_opacity=1;  blend_mode=VS::MATERIAL_BLEND_MODE_MIX; visible=true; rect_dirty=true; custom_rect=false; ontop=true; shader_version=0; shader_owner=NULL;}
 		virtual ~CanvasItem() { clear(); }
 	};
 
@@ -886,7 +903,7 @@ public:
 	virtual void canvas_draw_polygon(int p_vertex_count, const int* p_indices, const Vector2* p_vertices, const Vector2* p_uvs, const Color* p_colors,const RID& p_texture,bool p_singlecolor)=0;
 	virtual void canvas_set_transform(const Matrix32& p_transform)=0;
 
-	virtual void canvas_render_items(CanvasItem *p_item_list)=0;
+	virtual void canvas_render_items(CanvasItem *p_item_list,int p_z,const Color& p_modulate,CanvasLight *p_light)=0;
 
 
 	/* ENVIRONMENT */
diff --git a/servers/visual/visual_server_raster.cpp b/servers/visual/visual_server_raster.cpp
index e8fa319f11..cef6fe567d 100644
--- a/servers/visual/visual_server_raster.cpp
+++ b/servers/visual/visual_server_raster.cpp
@@ -3195,6 +3195,7 @@ RID VisualServerRaster::canvas_create() {
 	return rid;
 }
 
+
 void VisualServerRaster::canvas_set_item_mirroring(RID p_canvas,RID p_item,const Point2& p_mirroring) {
 
 	Canvas * canvas = canvas_owner.get(p_canvas);
@@ -3220,6 +3221,14 @@ Point2 VisualServerRaster::canvas_get_item_mirroring(RID p_canvas,RID p_item) co
 	return canvas->child_items[idx].mirror;
 }
 
+void VisualServerRaster::canvas_set_modulate(RID p_canvas,const Color& p_color) {
+
+	Canvas * canvas = canvas_owner.get(p_canvas);
+	ERR_FAIL_COND(!canvas);
+	canvas->modulate=p_color;
+}
+
+
 
 RID VisualServerRaster::canvas_item_create() {
 	
@@ -3305,14 +3314,27 @@ bool VisualServerRaster::canvas_item_is_visible(RID p_item) const {
 
 }
 
+void VisualServerRaster::canvas_item_set_light_mask(RID p_canvas_item,int p_mask) {
+
+	VS_CHANGED;
+
+	CanvasItem *canvas_item = canvas_item_owner.get( p_canvas_item );
+	ERR_FAIL_COND(!canvas_item);
+
+	if (canvas_item->light_mask==p_mask)
+		return;
+	VS_CHANGED;
+
+	canvas_item->light_mask=p_mask;
+
+}
+
+
 void VisualServerRaster::canvas_item_set_blend_mode(RID p_canvas_item,MaterialBlendMode p_blend) {
 
 	VS_CHANGED;
 
 	CanvasItem *canvas_item = canvas_item_owner.get( p_canvas_item );
-	if (!canvas_item) {
-		printf("!canvas_item\n");
-	};
 	ERR_FAIL_COND(!canvas_item);
 
 	if (canvas_item->blend_mode==p_blend)
@@ -3832,6 +3854,23 @@ void VisualServerRaster::canvas_light_attach_to_canvas(RID p_light,RID p_canvas)
 	Rasterizer::CanvasLight *clight = canvas_light_owner.get(p_light);
 	ERR_FAIL_COND(!clight);
 
+	if (clight->canvas.is_valid()) {
+
+		Canvas *canvas = canvas_owner.get(clight->canvas);
+		canvas->lights.erase(clight);
+	}
+
+	if (!canvas_owner.owns(p_canvas))
+		p_canvas=RID();
+	clight->canvas=p_canvas;
+
+	if (clight->canvas.is_valid()) {
+
+		Canvas *canvas = canvas_owner.get(clight->canvas);
+		canvas->lights.insert(clight);
+	}
+
+
 
 }
 void VisualServerRaster::canvas_light_set_enabled(RID p_light, bool p_enabled){
@@ -3885,6 +3924,16 @@ void VisualServerRaster::canvas_light_set_z_range(RID p_light, int p_min_z,int p
 	clight->z_max=p_max_z;
 
 }
+
+void VisualServerRaster::canvas_light_set_layer_range(RID p_light, int p_min_layer,int p_max_layer) {
+
+	Rasterizer::CanvasLight *clight = canvas_light_owner.get(p_light);
+	ERR_FAIL_COND(!clight);
+	clight->layer_min=p_min_layer;
+	clight->layer_max=p_max_layer;
+
+}
+
 void VisualServerRaster::canvas_light_set_item_mask(RID p_light, int p_mask){
 
 	Rasterizer::CanvasLight *clight = canvas_light_owner.get(p_light);
@@ -3893,11 +3942,12 @@ void VisualServerRaster::canvas_light_set_item_mask(RID p_light, int p_mask){
 
 }
 
-void VisualServerRaster::canvas_light_set_blend_mode(RID p_light, CanvasLightBlendMode p_blend_mode){
+void VisualServerRaster::canvas_light_set_subtract_mode(RID p_light, bool p_enable) {
+
 
 	Rasterizer::CanvasLight *clight = canvas_light_owner.get(p_light);
 	ERR_FAIL_COND(!clight);
-	clight->blend_mode=p_blend_mode;
+	clight->subtract=p_enable;
 
 }
 void VisualServerRaster::canvas_light_set_shadow_enabled(RID p_light, bool p_enabled){
@@ -4194,7 +4244,13 @@ void VisualServerRaster::free( RID p_rid ) {
 
 			canvas->child_items[i].item->parent=RID();
 		}
-		
+
+		for (Set<Rasterizer::CanvasLight*>::Element *E=canvas->lights.front();E;E=E->next()) {
+
+			E->get()->canvas=RID();
+		}
+
+
 		canvas_owner.free( p_rid );
 		
 		memdelete( canvas );
@@ -4232,6 +4288,12 @@ void VisualServerRaster::free( RID p_rid ) {
 		Rasterizer::CanvasLight *canvas_light = canvas_light_owner.get(p_rid);
 		ERR_FAIL_COND(!canvas_light);
 
+		if (canvas_light->canvas.is_valid()) {
+			Canvas* canvas = canvas_owner.get(canvas_light->canvas);
+			if (canvas)
+				canvas->lights.erase(canvas_light);
+		}
+
 		canvas_light_owner.free( p_rid );
 		memdelete( canvas_light );
 
@@ -6280,7 +6342,7 @@ void VisualServerRaster::_render_camera(Viewport *p_viewport,Camera *p_camera, S
 }
 
 
-void VisualServerRaster::_render_canvas_item_tree(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect) {
+void VisualServerRaster::_render_canvas_item_tree(CanvasItem *p_canvas_item, const Matrix32& p_transform, const Rect2& p_clip_rect, const Color& p_modulate, Rasterizer::CanvasLight *p_lights) {
 
 
 	static const int z_range = CANVAS_ITEM_Z_MAX-CANVAS_ITEM_Z_MIN+1;
@@ -6298,7 +6360,7 @@ void VisualServerRaster::_render_canvas_item_tree(CanvasItem *p_canvas_item,cons
 	for(int i=0;i<z_range;i++) {
 		if (!z_list[i])
 			continue;
-		rasterizer->canvas_render_items(z_list[i]);
+		rasterizer->canvas_render_items(z_list[i],CANVAS_ITEM_Z_MIN+i,p_modulate,p_lights);
 	}
 
 }
@@ -6404,7 +6466,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 		//something to draw?
 		ci->final_transform=xform;
 		ci->final_opacity=opacity * ci->self_opacity;
-
+		ci->global_rect_cache=global_rect;
 
 		int zidx = p_z-CANVAS_ITEM_Z_MIN;
 
@@ -6417,6 +6479,8 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 			z_last_list[zidx]=ci;
 		}
 
+
+
 		ci->next=NULL;
 
 	}
@@ -6430,7 +6494,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 
 }
 
-void VisualServerRaster::_render_canvas(Canvas *p_canvas,const Matrix32 &p_transform) {
+void VisualServerRaster::_render_canvas(Canvas *p_canvas,const Matrix32 &p_transform,Rasterizer::CanvasLight *p_lights) {
 
 	rasterizer->canvas_begin();
 
@@ -6463,30 +6527,30 @@ void VisualServerRaster::_render_canvas(Canvas *p_canvas,const Matrix32 &p_trans
 		for(int i=0;i<z_range;i++) {
 			if (!z_list[i])
 				continue;
-			rasterizer->canvas_render_items(z_list[i]);
+			rasterizer->canvas_render_items(z_list[i],CANVAS_ITEM_Z_MIN+i,p_canvas->modulate,p_lights);
 		}
 	} else {
 
 		for(int i=0;i<l;i++) {
 
 			Canvas::ChildItem& ci=p_canvas->child_items[i];
-			_render_canvas_item_tree(ci.item,p_transform,clip_rect);
+			_render_canvas_item_tree(ci.item,p_transform,clip_rect,p_canvas->modulate,p_lights);
 
 			//mirroring (useful for scrolling backgrounds)
 			if (ci.mirror.x!=0) {
 
 				Matrix32 xform2 = p_transform * Matrix32(0,Vector2(ci.mirror.x,0));
-				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+				_render_canvas_item_tree(ci.item,xform2,clip_rect,p_canvas->modulate,p_lights);
 			}
 			if (ci.mirror.y!=0) {
 
 				Matrix32 xform2 = p_transform * Matrix32(0,Vector2(0,ci.mirror.y));
-				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+				_render_canvas_item_tree(ci.item,xform2,clip_rect,p_canvas->modulate,p_lights);
 			}
 			if (ci.mirror.y!=0 && ci.mirror.x!=0) {
 
 				Matrix32 xform2 = p_transform * Matrix32(0,ci.mirror);
-				_render_canvas_item_tree(ci.item,xform2,clip_rect);
+				_render_canvas_item_tree(ci.item,xform2,clip_rect,p_canvas->modulate,p_lights);
 			}
 
 		}
@@ -6549,7 +6613,43 @@ void VisualServerRaster::_draw_viewport(Viewport *p_viewport,int p_ofs_x, int p_
 
 		Map<Viewport::CanvasKey,Viewport::CanvasData*> canvas_map;
 
+		Rect2 clip_rect(0,0,viewport_rect.width,viewport_rect.height);
+		Rasterizer::CanvasLight *lights=NULL;
+
 		for (Map<RID,Viewport::CanvasData>::Element *E=p_viewport->canvas_map.front();E;E=E->next()) {
+
+			Matrix32 xf = p_viewport->global_transform * E->get().transform;
+
+			//find lights in canvas
+
+
+			for(Set<Rasterizer::CanvasLight*>::Element *F=E->get().canvas->lights.front();F;F=F->next()) {
+
+				Rasterizer::CanvasLight* cl=F->get();
+				if (cl->enabled && cl->texture.is_valid()) {
+					//not super efficient..
+					Size2 tsize(rasterizer->texture_get_width(cl->texture),rasterizer->texture_get_height(cl->texture));
+					Vector2 offset=tsize/2.0;
+					cl->rect_cache=Rect2(-offset+cl->texture_offset,tsize);
+					cl->xform_cache=xf * cl->xform;
+
+					if (clip_rect.intersects_transformed(cl->xform_cache,cl->rect_cache)) {
+						cl->filter_next_ptr=lights;
+						lights=cl;
+						cl->texture_cache=NULL;
+						Matrix32 scale;
+						scale.scale(cl->rect_cache.size);
+						scale.elements[2]=cl->rect_cache.pos;
+						cl->light_shader_xform = (cl->xform_cache * scale).affine_inverse();
+						cl->light_shader_pos=cl->xform_cache[2];
+					}
+
+
+
+
+				}
+			}
+
 			canvas_map[ Viewport::CanvasKey( E->key(), E->get().layer) ]=&E->get();
 
 		}
@@ -6560,7 +6660,19 @@ void VisualServerRaster::_draw_viewport(Viewport *p_viewport,int p_ofs_x, int p_
 	//		print_line("canvas "+itos(i)+" size: "+itos(I->get()->canvas->child_items.size()));
 			//print_line("GT "+p_viewport->global_transform+". CT: "+E->get()->transform);
 			Matrix32 xform = p_viewport->global_transform * E->get()->transform;
-			_render_canvas( E->get()->canvas,xform );
+
+			Rasterizer::CanvasLight *canvas_lights=NULL;
+
+			Rasterizer::CanvasLight *ptr=lights;
+			while(ptr) {
+				if (E->get()->layer>=ptr->layer_min && E->get()->layer<=ptr->layer_max) {
+					ptr->next_ptr=canvas_lights;
+					canvas_lights=ptr;
+				}
+				ptr=ptr->filter_next_ptr;
+			}
+
+			_render_canvas( E->get()->canvas,xform,canvas_lights );
 			i++;
 
 		}
diff --git a/servers/visual/visual_server_raster.h b/servers/visual/visual_server_raster.h
index c15b6ebb26..eec677068e 100644
--- a/servers/visual/visual_server_raster.h
+++ b/servers/visual/visual_server_raster.h
@@ -410,6 +410,8 @@ class VisualServerRaster : public VisualServer {
 		}
 	};
 
+	struct CanvasLight;
+
 	struct Canvas {
 
 		Set<RID> viewports;
@@ -419,8 +421,10 @@ class VisualServerRaster : public VisualServer {
 			CanvasItem *item;
 		};
 
+		Set<Rasterizer::CanvasLight*> lights;
 
 		Vector<ChildItem> child_items;
+		Color modulate;
 
 		int find_item(CanvasItem *p_item) {
 			for(int i=0;i<child_items.size();i++) {
@@ -435,7 +439,7 @@ class VisualServerRaster : public VisualServer {
 				child_items.remove(idx);
 		}
 
-		Canvas() {  }
+		Canvas() { modulate=Color(1,1,1,1); }
 		
 	};
 
@@ -603,9 +607,9 @@ class VisualServerRaster : public VisualServer {
 
 	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 Matrix32& p_transform,const Rect2& p_clip_rect);
+	void _render_canvas_item_tree(CanvasItem *p_canvas_item, const Matrix32& p_transform, const Rect2& p_clip_rect, const Color &p_modulate, Rasterizer::CanvasLight *p_lights);
 	void _render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& 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_shader_owner);
-	void _render_canvas(Canvas *p_canvas,const Matrix32 &p_transform);
+	void _render_canvas(Canvas *p_canvas, const Matrix32 &p_transform, Rasterizer::CanvasLight *p_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);
 
@@ -1075,6 +1079,8 @@ public:
 	virtual RID canvas_create();
 	virtual void canvas_set_item_mirroring(RID p_canvas,RID p_item,const Point2& p_mirroring);
 	virtual Point2 canvas_get_item_mirroring(RID p_canvas,RID p_item) const;
+	virtual void canvas_set_modulate(RID p_canvas,const Color& p_color);
+
 
 	virtual RID canvas_item_create();
 
@@ -1085,6 +1091,8 @@ public:
 	virtual bool canvas_item_is_visible(RID p_item) const;
 
 	virtual void canvas_item_set_blend_mode(RID p_canvas_item,MaterialBlendMode p_blend);
+	virtual void canvas_item_set_light_mask(RID p_canvas_item,int p_mask);
+
 
 
 	//virtual void canvas_item_set_rect(RID p_item, const Rect2& p_rect);
@@ -1137,20 +1145,10 @@ public:
 	virtual void canvas_light_set_color(RID p_light, const Color& p_color);
 	virtual void canvas_light_set_height(RID p_light, float p_height);
 	virtual void canvas_light_set_z_range(RID p_light, int p_min_z,int p_max_z);
+	virtual void canvas_light_set_layer_range(RID p_light, int p_min_layer,int p_max_layer);
 	virtual void canvas_light_set_item_mask(RID p_light, int p_mask);
 
-	enum CanvasightBlendMode {
-		CANVAS_LIGHT_BLEND_ADD,
-		CANVAS_LIGHT_BLEND_SUB,
-		CANVAS_LIGHT_BLEND_MULTIPLY,
-		CANVAS_LIGHT_BLEND_DODGE,
-		CANVAS_LIGHT_BLEND_BURN,
-		CANVAS_LIGHT_BLEND_LIGHTEN,
-		CANVAS_LIGHT_BLEND_DARKEN,
-		CANVAS_LIGHT_BLEND_OVERLAY,
-		CANVAS_LIGHT_BLEND_SCREEN,
-	};
-	virtual void canvas_light_set_blend_mode(RID p_light, CanvasLightBlendMode p_blend_mode);
+	virtual void canvas_light_set_subtract_mode(RID p_light, bool p_enable);
 	virtual void canvas_light_set_shadow_enabled(RID p_light, bool p_enabled);
 	virtual void canvas_light_set_shadow_buffer_size(RID p_light, int p_size);
 	virtual void canvas_light_set_shadow_filter(RID p_light, int p_size);
diff --git a/servers/visual/visual_server_wrap_mt.h b/servers/visual/visual_server_wrap_mt.h
index 9574dff018..c94425c586 100644
--- a/servers/visual/visual_server_wrap_mt.h
+++ b/servers/visual/visual_server_wrap_mt.h
@@ -1087,6 +1087,8 @@ public:
 	FUNC0R(RID,canvas_create);
 	FUNC3(canvas_set_item_mirroring,RID,RID,const Point2&);
 	FUNC2RC(Point2,canvas_get_item_mirroring,RID,RID);
+	FUNC2(canvas_set_modulate,RID,const Color&);
+
 
 	FUNC0R(RID,canvas_item_create);
 
@@ -1097,7 +1099,7 @@ public:
 	FUNC1RC(bool,canvas_item_is_visible,RID);
 
 	FUNC2(canvas_item_set_blend_mode,RID,MaterialBlendMode );
-
+	FUNC2(canvas_item_set_light_mask,RID,int );
 
 	//FUNC(canvas_item_set_rect,RID, const Rect2& p_rect);
 	FUNC2(canvas_item_set_transform,RID, const Matrix32& );
@@ -1155,10 +1157,11 @@ public:
 	FUNC2(canvas_light_set_texture_offset,RID,const Vector2&);
 	FUNC2(canvas_light_set_color,RID,const Color&);
 	FUNC2(canvas_light_set_height,RID,float);
+	FUNC3(canvas_light_set_layer_range,RID,int,int);
 	FUNC3(canvas_light_set_z_range,RID,int,int);
 	FUNC2(canvas_light_set_item_mask,RID,int);
 
-	FUNC2(canvas_light_set_blend_mode,RID,CanvasLightBlendMode);
+	FUNC2(canvas_light_set_subtract_mode,RID,bool);
 	FUNC2(canvas_light_set_shadow_enabled,RID,bool);
 	FUNC2(canvas_light_set_shadow_buffer_size,RID,int);
 	FUNC2(canvas_light_set_shadow_filter,RID,int);
diff --git a/servers/visual_server.h b/servers/visual_server.h
index 49ae8ce4e6..e9bc97628f 100644
--- a/servers/visual_server.h
+++ b/servers/visual_server.h
@@ -944,6 +944,8 @@ public:
 	virtual RID canvas_create()=0;
 	virtual void canvas_set_item_mirroring(RID p_canvas,RID p_item,const Point2& p_mirroring)=0;
 	virtual Point2 canvas_get_item_mirroring(RID p_canvas,RID p_item) const=0;
+	virtual void canvas_set_modulate(RID p_canvas,const Color& p_color)=0;
+
 
 
 	virtual RID canvas_item_create()=0;
@@ -953,6 +955,8 @@ public:
 	virtual void canvas_item_set_visible(RID p_item,bool p_visible)=0;
 	virtual bool canvas_item_is_visible(RID p_item) const=0;
 
+	virtual void canvas_item_set_light_mask(RID p_item,int p_mask)=0;
+
 	virtual void canvas_item_set_blend_mode(RID p_canvas_item,MaterialBlendMode p_blend)=0;
 
 	virtual void canvas_item_attach_viewport(RID p_item, RID p_viewport)=0;
@@ -1008,20 +1012,10 @@ public:
 	virtual void canvas_light_set_color(RID p_light, const Color& p_color)=0;
 	virtual void canvas_light_set_height(RID p_light, float p_height)=0;
 	virtual void canvas_light_set_z_range(RID p_light, int p_min_z,int p_max_z)=0;
+	virtual void canvas_light_set_layer_range(RID p_light, int p_min_layer,int p_max_layer)=0;
 	virtual void canvas_light_set_item_mask(RID p_light, int p_mask)=0;
 
-	enum CanvasLightBlendMode {
-		CANVAS_LIGHT_BLEND_ADD,
-		CANVAS_LIGHT_BLEND_SUB,
-		CANVAS_LIGHT_BLEND_MULTIPLY,
-		CANVAS_LIGHT_BLEND_DODGE,
-		CANVAS_LIGHT_BLEND_BURN,
-		CANVAS_LIGHT_BLEND_LIGHTEN,
-		CANVAS_LIGHT_BLEND_DARKEN,
-		CANVAS_LIGHT_BLEND_OVERLAY,
-		CANVAS_LIGHT_BLEND_SCREEN,
-	};
-	virtual void canvas_light_set_blend_mode(RID p_light, CanvasLightBlendMode p_blend_mode)=0;
+	virtual void canvas_light_set_subtract_mode(RID p_light, bool p_enable)=0;
 	virtual void canvas_light_set_shadow_enabled(RID p_light, bool p_enabled)=0;
 	virtual void canvas_light_set_shadow_buffer_size(RID p_light, int p_size)=0;
 	virtual void canvas_light_set_shadow_filter(RID p_light, int p_size)=0;