-fixed issue with shader not being reset on layers, closes #1199

-ability for shader to use parent shader and params, closes #1198

11 files changed, 81 insertions, 35 deletions

diff --git a/drivers/gles2/rasterizer_gles2.cpp b/drivers/gles2/rasterizer_gles2.cpp
index 80dd1a7898..44fb210526 100644
--- a/drivers/gles2/rasterizer_gles2.cpp
+++ b/drivers/gles2/rasterizer_gles2.cpp
@@ -4961,7 +4961,7 @@ _FORCE_INLINE_ void RasterizerGLES2::_update_material_shader_params(Material *p_
 			keep=false;
 		else if (old_mparams[E->key()].value.get_type()!=E->value().default_value.get_type()) {
 			//type changed between old and new
-			/*if (old_mparams[E->key()].value.get_type()==Variant::OBJECT) {
+			/*	if (old_mparams[E->key()].value.get_type()==Variant::OBJECT) {
 				if (E->value().default_value.get_type()!=Variant::_RID) //hackfor textures
 					keep=false;
 			} else if (!old_mparams[E->key()].value.is_num() || !E->value().default_value.get_type())
@@ -7799,7 +7799,7 @@ void RasterizerGLES2::canvas_begin() {
 	canvas_shader.bind();
 	canvas_shader.set_uniform(CanvasShaderGLES2::TEXTURE, 0);
 	_set_color_attrib(Color(1,1,1));
-	Transform canvas_transform;
+	canvas_transform=Transform();
 	canvas_transform.translate(-(viewport.width / 2.0f), -(viewport.height / 2.0f), 0.0f);
 	float csy = 1.0;
 	if (current_rt && current_rt_vflip)
@@ -7813,6 +7813,9 @@ void RasterizerGLES2::canvas_begin() {
 	canvas_opacity=1.0;
 	canvas_blend_mode=VS::MATERIAL_BLEND_MODE_MIX;
 
+	canvas_texscreen_used=false;
+	uses_texpixel_size=false;
+	canvas_last_shader=RID();
 
 }
 
@@ -8294,26 +8297,13 @@ void RasterizerGLES2::canvas_set_transform(const Matrix32& p_transform) {
 	//canvas_transform = Variant(p_transform);
 }
 
+
 void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 
 
 	CanvasItem *current_clip=NULL;
-	RID last_shader;
-
-	Transform canvas_transform;
-	canvas_transform.translate(-(viewport.width / 2.0f), -(viewport.height / 2.0f), 0.0f);
-	float csy = 1.0;
-	if (current_rt && current_rt_vflip)
-		csy = -1.0;
 
-	canvas_transform.scale( Vector3( 2.0f / viewport.width, csy * -2.0f / viewport.height, 1.0f ) );
 	canvas_opacity=1.0;
-	uses_texpixel_size=false;
-
-
-	canvas_shader.set_uniform(CanvasShaderGLES2::PROJECTION_MATRIX,canvas_transform);
-	canvas_shader.set_uniform(CanvasShaderGLES2::EXTRA_MATRIX,Matrix32());
-
 	while(p_item_list) {
 
 		CanvasItem *ci=p_item_list;
@@ -8324,7 +8314,7 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 			}
 			memdelete(ci->vp_render);
 			ci->vp_render=NULL;
-			last_shader=RID();
+			canvas_last_shader=RID();
 		}
 
 		if (current_clip!=ci->final_clip_owner) {
@@ -8345,12 +8335,13 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 
 
 		//begin rect
+		CanvasItem *shader_owner = ci->shader_owner?ci->shader_owner:ci;
 
-		if (ci->shader!=last_shader) {
+		if (shader_owner->shader!=canvas_last_shader) {
 
 			Shader *shader = NULL;
-			if (ci->shader.is_valid()) {
-				shader = shader_owner.get(ci->shader);
+			if (shader_owner->shader.is_valid()) {
+				shader = this->shader_owner.get(shader_owner->shader);
 				if (shader && !shader->valid) {
 					shader=NULL;
 				}
@@ -8361,9 +8352,9 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 				if (canvas_shader.bind())
 					rebind_texpixel_size=true;
 
-				if (ci->shader_version!=shader->version) {
+				if (shader_owner->shader_version!=shader->version) {
 					//todo optimize uniforms
-					ci->shader_version=shader->version;
+					shader_owner->shader_version=shader->version;
 				}
 				//this can be optimized..
 				int tex_id=1;
@@ -8371,7 +8362,7 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 				for(Map<StringName,ShaderLanguage::Uniform>::Element *E=shader->uniforms.front();E;E=E->next()) {
 
 
-					Map<StringName,Variant>::Element *F=ci->shader_param.find(E->key());
+					Map<StringName,Variant>::Element *F=shader_owner->shader_param.find(E->key());
 					Variant &v=F?F->get():E->get().default_value;
 					if (v.get_type()==Variant::_RID || v.get_type()==Variant::OBJECT) {
 						int loc = canvas_shader.get_custom_uniform_location(idx); //should be automatic..
@@ -8422,7 +8413,7 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list) {
 			}
 
 			canvas_shader.set_uniform(CanvasShaderGLES2::PROJECTION_MATRIX,canvas_transform);
-			last_shader=ci->shader;
+			canvas_last_shader=shader_owner->shader;
 		}
 
 		canvas_shader.set_uniform(CanvasShaderGLES2::MODELVIEW_MATRIX,ci->final_transform);
diff --git a/drivers/gles2/rasterizer_gles2.h b/drivers/gles2/rasterizer_gles2.h
index 65947fb034..0f77d18dee 100644
--- a/drivers/gles2/rasterizer_gles2.h
+++ b/drivers/gles2/rasterizer_gles2.h
@@ -1174,6 +1174,11 @@ class RasterizerGLES2 : public Rasterizer {
 	float canvas_opacity;
 	bool uses_texpixel_size;
 	bool rebind_texpixel_size;
+	Transform canvas_transform;
+	RID canvas_last_shader;
+	bool canvas_texscreen_used;
+
+
 	_FORCE_INLINE_ Texture* _bind_canvas_texture(const RID& p_texture);
 	VS::MaterialBlendMode canvas_blend_mode;
 
@@ -1542,6 +1547,7 @@ public:
 	virtual void canvas_draw_primitive(const Vector<Point2>& p_points, const Vector<Color>& p_colors,const Vector<Point2>& p_uvs, RID p_texture,float p_width);
 	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);
 	virtual void canvas_set_transform(const Matrix32& p_transform);
+
 	virtual void canvas_render_items(CanvasItem *p_item_list);
 
 	/* ENVIRONMENT */
diff --git a/scene/2d/canvas_item.cpp b/scene/2d/canvas_item.cpp
index c28bf71e04..ae857bbce9 100644
--- a/scene/2d/canvas_item.cpp
+++ b/scene/2d/canvas_item.cpp
@@ -746,6 +746,17 @@ void CanvasItem::set_shader(const Ref<Shader>& p_shader) {
 	_change_notify(); //properties for shader exposed
 }
 
+void CanvasItem::set_use_parent_shader(bool p_use_parent_shader) {
+
+	use_parent_shader=p_use_parent_shader;
+	VS::get_singleton()->canvas_item_set_use_parent_shader(canvas_item,p_use_parent_shader);
+}
+
+bool CanvasItem::get_use_parent_shader() const{
+
+	return use_parent_shader;
+}
+
 Ref<Shader> CanvasItem::get_shader() const{
 
 	return shader;
@@ -868,17 +879,20 @@ void CanvasItem::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("set_shader","shader"),&CanvasItem::set_shader);
 	ObjectTypeDB::bind_method(_MD("get_shader"),&CanvasItem::get_shader);
+	ObjectTypeDB::bind_method(_MD("set_use_parent_shader","enable"),&CanvasItem::set_use_parent_shader);
+	ObjectTypeDB::bind_method(_MD("get_use_parent_shader"),&CanvasItem::get_use_parent_shader);
 
 	BIND_VMETHOD(MethodInfo("_draw"));
 
 	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"visibility/visible"), _SCS("_set_visible_"),_SCS("_is_visible_") );
 	ADD_PROPERTY( PropertyInfo(Variant::REAL,"visibility/opacity",PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_opacity"),_SCS("get_opacity") );
 	ADD_PROPERTY( PropertyInfo(Variant::REAL,"visibility/self_opacity",PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_self_opacity"),_SCS("get_self_opacity") );
-	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"visibility/behind_parent"), _SCS("set_draw_behind_parent"),_SCS("is_draw_behind_parent_enabled") );
+	ADD_PROPERTYNZ( PropertyInfo(Variant::BOOL,"visibility/behind_parent"), _SCS("set_draw_behind_parent"),_SCS("is_draw_behind_parent_enabled") );
 	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"visibility/on_top",PROPERTY_HINT_NONE,"",0), _SCS("_set_on_top"),_SCS("_is_on_top") ); //compatibility
 
 	ADD_PROPERTYNZ( PropertyInfo(Variant::INT,"visibility/blend_mode",PROPERTY_HINT_ENUM, "Mix,Add,Sub,Mul,PMAlpha"), _SCS("set_blend_mode"),_SCS("get_blend_mode") );
 	ADD_PROPERTYNZ( PropertyInfo(Variant::OBJECT,"shader/shader",PROPERTY_HINT_RESOURCE_TYPE, "CanvasItemShader,CanvasItemShaderGraph"), _SCS("set_shader"),_SCS("get_shader") );
+	ADD_PROPERTYNZ( PropertyInfo(Variant::BOOL,"shader/use_parent"), _SCS("set_use_parent_shader"),_SCS("get_use_parent_shader") );
 	//exporting these two things doesn't really make much sense i think
 	//ADD_PROPERTY( PropertyInfo(Variant::BOOL,"transform/toplevel"), _SCS("set_as_toplevel"),_SCS("is_set_as_toplevel") );
 	//ADD_PROPERTY(PropertyInfo(Variant::BOOL,"transform/notify"),_SCS("set_transform_notify"),_SCS("is_transform_notify_enabled"));
@@ -955,6 +969,7 @@ CanvasItem::CanvasItem() : xform_change(this) {
 	block_transform_notify=false;
 //	viewport=NULL;
 	canvas_layer=NULL;
+	use_parent_shader;
 	global_invalid=true;
 
 	C=NULL;
diff --git a/scene/2d/canvas_item.h b/scene/2d/canvas_item.h
index 7c162d9c81..ed3ade9df2 100644
--- a/scene/2d/canvas_item.h
+++ b/scene/2d/canvas_item.h
@@ -81,6 +81,7 @@ private:
 	bool block_transform_notify;
 	bool behind;
 
+	bool use_parent_shader;
 	Ref<Shader> shader;
 
 	mutable Matrix32 global_transform;
@@ -214,6 +215,9 @@ public:
 	void set_shader(const Ref<Shader>& p_shader);
 	Ref<Shader> get_shader() const;
 
+	void set_use_parent_shader(bool p_use_parent_shader);
+	bool get_use_parent_shader() const;
+
 	void set_shader_param(const StringName& p_param,const Variant& p_value);
 	Variant get_shader_param(const StringName& p_param) const;
 
diff --git a/servers/visual/rasterizer.h b/servers/visual/rasterizer.h
index 346d535ae8..92c7b8ac14 100644
--- a/servers/visual/rasterizer.h
+++ b/servers/visual/rasterizer.h
@@ -703,6 +703,7 @@ public:
 		Matrix32 final_transform;
 		Rect2 final_clip_rect;
 		CanvasItem* final_clip_owner;
+		CanvasItem* shader_owner;
 		ViewportRender *vp_render;
 
 		const Rect2& get_rect() const {
@@ -829,8 +830,8 @@ public:
 			return rect;
 		}
 
-		void clear() { for (int i=0;i<commands.size();i++) memdelete( commands[i] ); commands.clear(); clip=false; rect_dirty=true; final_clip_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;}
+		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;}
 		virtual ~CanvasItem() { clear(); }
 	};
 
@@ -851,6 +852,7 @@ public:
 	virtual void canvas_draw_primitive(const Vector<Point2>& p_points, const Vector<Color>& p_colors,const Vector<Point2>& p_uvs, RID p_texture,float p_width)=0;
 	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;
 
 
diff --git a/servers/visual/rasterizer_dummy.h b/servers/visual/rasterizer_dummy.h
index fa7f197692..c72149f88f 100644
--- a/servers/visual/rasterizer_dummy.h
+++ b/servers/visual/rasterizer_dummy.h
@@ -709,6 +709,7 @@ public:
 	virtual void canvas_draw_primitive(const Vector<Point2>& p_points, const Vector<Color>& p_colors,const Vector<Point2>& p_uvs, RID p_texture,float p_width);
 	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);
 	virtual void canvas_set_transform(const Matrix32& p_transform);
+
 	virtual void canvas_render_items(CanvasItem *p_item_list);
 
 	/* ENVIRONMENT */
diff --git a/servers/visual/shader_language.cpp b/servers/visual/shader_language.cpp
index 80f82fdc42..f5bff29f47 100644
--- a/servers/visual/shader_language.cpp
+++ b/servers/visual/shader_language.cpp
@@ -1120,8 +1120,7 @@ const ShaderLanguage::BuiltinsDef ShaderLanguage::ci_vertex_builtins_defs[]={
 	//builtins
 	{ "WORLD_MATRIX", TYPE_MAT4},
 	{ "PROJECTION_MATRIX", TYPE_MAT4},
-	{ "EXTRA_MATRIX", TYPE_MAT4},
-	{ "MODELVIEW_MATRIX", TYPE_MAT4},
+	{ "EXTRA_MATRIX", TYPE_MAT4},	
 	{ "TIME", TYPE_FLOAT},
 	{ NULL, TYPE_VOID},
 };
diff --git a/servers/visual/visual_server_raster.cpp b/servers/visual/visual_server_raster.cpp
index 96aa873266..dfa1e849b7 100644
--- a/servers/visual/visual_server_raster.cpp
+++ b/servers/visual/visual_server_raster.cpp
@@ -3699,6 +3699,15 @@ void VisualServerRaster::canvas_item_set_z(RID p_item, int p_z) {
 
 }
 
+void VisualServerRaster::canvas_item_set_use_parent_shader(RID p_item, bool p_enable) {
+
+	VS_CHANGED;
+	CanvasItem *canvas_item = canvas_item_owner.get( p_item );
+	ERR_FAIL_COND(!canvas_item);
+	canvas_item->use_parent_shader=p_enable;
+
+}
+
 void VisualServerRaster::canvas_item_set_shader(RID p_item, RID p_shader) {
 
 	VS_CHANGED;
@@ -6139,7 +6148,7 @@ void VisualServerRaster::_render_canvas_item_tree(CanvasItem *p_canvas_item,cons
 	}
 
 
-	_render_canvas_item(p_canvas_item,p_transform,p_clip_rect,1.0,z_list,z_last_list,NULL);
+	_render_canvas_item(p_canvas_item,p_transform,p_clip_rect,1.0,z_list,z_last_list,NULL,NULL);
 
 	for(int i=0;i<CANVAS_ITEM_Z_MAX;i++) {
 		if (!z_list[i])
@@ -6156,9 +6165,10 @@ void VisualServerRaster::_render_canvas_item_viewport(VisualServer* p_self,void
 	Viewport *vp=(Viewport*)p_vp;
 	self->_draw_viewport(vp,p_rect.pos.x,p_rect.pos.y,p_rect.size.x,p_rect.size.y);
 	self->rasterizer->canvas_begin();
+
 }
 
-void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect, float p_opacity,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip) {
+void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect, float p_opacity,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip,CanvasItem *p_shader_owner) {
 
 	CanvasItem *ci = p_canvas_item;
 
@@ -6203,6 +6213,12 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 		ci->vp_render=NULL;
 	}
 
+	if (ci->use_parent_shader && p_shader_owner)
+		ci->shader_owner=p_shader_owner;
+	else {
+		p_shader_owner=ci;
+		ci->shader_owner=NULL;
+	}
 
 
 	float opacity = ci->opacity * p_opacity;
@@ -6231,7 +6247,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 
 		if (child_items[i]->ontop)
 			continue;
-		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner);
+		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
 	}
 
 
@@ -6257,7 +6273,7 @@ void VisualServerRaster::_render_canvas_item(CanvasItem *p_canvas_item,const Mat
 
 		if (!child_items[i]->ontop)
 			continue;
-		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner);
+		_render_canvas_item(child_items[i],xform,p_clip_rect,opacity,z_list,z_last_list,(CanvasItem*)ci->final_clip_owner,p_shader_owner);
 	}
 
 }
@@ -6266,6 +6282,7 @@ void VisualServerRaster::_render_canvas(Canvas *p_canvas,const Matrix32 &p_trans
 
 	rasterizer->canvas_begin();
 
+
 	int l = p_canvas->child_items.size();
 
 	for(int i=0;i<l;i++) {
@@ -6452,7 +6469,7 @@ void VisualServerRaster::_draw_viewports() {
 			rasterizer->set_viewport(viewport_rect);
 		}
 
-		rasterizer->canvas_begin();
+		rasterizer->canvas_begin();		
 		rasterizer->canvas_disable_blending();
 		rasterizer->canvas_begin_rect(Matrix32());
 		rasterizer->canvas_draw_rect(E->get()->rt_to_screen_rect,0,Rect2(Point2(),E->get()->rt_to_screen_rect.size),E->get()->render_target_texture,Color(1,1,1));
diff --git a/servers/visual/visual_server_raster.h b/servers/visual/visual_server_raster.h
index 098c57480a..d30ac17400 100644
--- a/servers/visual/visual_server_raster.h
+++ b/servers/visual/visual_server_raster.h
@@ -85,6 +85,7 @@ class VisualServerRaster : public VisualServer {
 		Vector<Point2> shape;
 		Rect2 bounds;
 
+
 		Portal() { enabled=true; disable_distance=50; disable_color=Color(); connect_range=0.8; }
 	};
 
@@ -382,6 +383,7 @@ class VisualServerRaster : public VisualServer {
 		bool sort_y;
 		float opacity;
 		float self_opacity;
+		bool use_parent_shader;
 
 
 		Vector<CanvasItem*> child_items;
@@ -393,6 +395,7 @@ class VisualServerRaster : public VisualServer {
 			opacity=1;
 			self_opacity=1;
 			sort_y=false;
+			use_parent_shader=false;
 		}
 	};
 
@@ -597,7 +600,7 @@ 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(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect,float p_opacity,Rasterizer::CanvasItem **z_list,Rasterizer::CanvasItem **z_last_list,CanvasItem *p_canvas_clip);
+	void _render_canvas_item(CanvasItem *p_canvas_item,const Matrix32& p_transform,const Rect2& p_clip_rect,float p_opacity,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);
 	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);
@@ -1113,6 +1116,9 @@ public:
 	virtual void canvas_item_set_shader(RID p_item, RID p_shader);
 	virtual RID canvas_item_get_shader(RID p_item) const;
 
+	virtual void canvas_item_set_use_parent_shader(RID p_item, bool p_enable);
+
+
 	virtual void canvas_item_set_shader_param(RID p_canvas_item, const StringName& p_param, const Variant& p_value);
 	virtual Variant canvas_item_get_shader_param(RID p_canvas_item, const StringName& p_param) const;
 
diff --git a/servers/visual/visual_server_wrap_mt.h b/servers/visual/visual_server_wrap_mt.h
index 300aba4551..c344161445 100644
--- a/servers/visual/visual_server_wrap_mt.h
+++ b/servers/visual/visual_server_wrap_mt.h
@@ -1136,6 +1136,9 @@ public:
 	FUNC2(canvas_item_set_shader,RID, RID );
 	FUNC1RC(RID,canvas_item_get_shader,RID );
 
+	FUNC2(canvas_item_set_use_parent_shader,RID, bool );
+
+
 	FUNC3(canvas_item_set_shader_param,RID,const StringName&,const Variant&);
 	FUNC2RC(Variant,canvas_item_get_shader_param,RID,const StringName&);
 
diff --git a/servers/visual_server.h b/servers/visual_server.h
index 6f759dcf05..5edf333e65 100644
--- a/servers/visual_server.h
+++ b/servers/visual_server.h
@@ -992,6 +992,8 @@ public:
 	virtual void canvas_item_set_shader(RID p_item, RID p_shader)=0;
 	virtual RID canvas_item_get_shader(RID p_item) const=0;
 
+	virtual void canvas_item_set_use_parent_shader(RID p_item, bool p_enable)=0;
+
 	virtual void canvas_item_set_shader_param(RID p_canvas_item, const StringName& p_param, const Variant& p_value)=0;
 	virtual Variant canvas_item_get_shader_param(RID p_canvas_item, const StringName& p_param) const=0;