Cppcheck report - Godot - branch: 3.x, commit: cd92ad0f69a842d94dc2d56f83cbd8f724ed2959 (2024-12-15): scene/2d/canvas_item.cpp

/**************************************************************************/
/*  canvas_item.cpp                                                       */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
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/* distribute, sublicense, and/or sell copies of the Software, and to     */
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/* included in all copies or substantial portions of the Software.        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
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#include "canvas_item.h"
#include "core/message_queue.h"
#include "core/method_bind_ext.gen.inc"
#include "core/os/input.h"
#include "core/version.h"
#include "scene/main/canvas_layer.h"
#include "scene/main/viewport.h"
#include "scene/resources/font.h"
#include "scene/resources/style_box.h"
#include "scene/resources/texture.h"
#include "scene/scene_string_names.h"
#include "servers/visual/visual_server_constants.h"
#include "servers/visual/visual_server_raster.h"
#include "servers/visual_server.h"

Mutex CanvasItemMaterial::material_mutex;
SelfList<CanvasItemMaterial>::List *CanvasItemMaterial::dirty_materials = nullptr;
Map<CanvasItemMaterial::MaterialKey, CanvasItemMaterial::ShaderData> CanvasItemMaterial::shader_map;
CanvasItemMaterial::ShaderNames *CanvasItemMaterial::shader_names = nullptr;

void CanvasItemMaterial::init_shaders() {
	dirty_materials = memnew(SelfList<CanvasItemMaterial>::List);

	shader_names = memnew(ShaderNames);

	shader_names->particles_anim_h_frames = "particles_anim_h_frames";
	shader_names->particles_anim_v_frames = "particles_anim_v_frames";
	shader_names->particles_anim_loop = "particles_anim_loop";
}

void CanvasItemMaterial::finish_shaders() {
	memdelete(dirty_materials);
	memdelete(shader_names);
	dirty_materials = nullptr;
}

void CanvasItemMaterial::_update_shader() {
	dirty_materials->remove(&element);

	MaterialKey mk = _compute_key();
	if (mk.key == current_key.key) {
		return; //no update required in the end
	}

	if (shader_map.has(current_key)) {
		shader_map[current_key].users--;
		if (shader_map[current_key].users == 0) {
			//deallocate shader, as it's no longer in use
			VS::get_singleton()->free(shader_map[current_key].shader);
			shader_map.erase(current_key);
		}
	}

	current_key = mk;

	if (shader_map.has(mk)) {
		VS::get_singleton()->material_set_shader(_get_material(), shader_map[mk].shader);
		shader_map[mk].users++;
		return;
	}

	//must create a shader!

	// Add a comment to describe the shader origin (useful when converting to ShaderMaterial).
	String code = "// NOTE: Shader automatically converted from " VERSION_NAME " " VERSION_FULL_CONFIG "'s CanvasItemMaterial.\n\n";

	code += "shader_type canvas_item;\nrender_mode ";
	switch (blend_mode) {
		case BLEND_MODE_MIX:
			code += "blend_mix";
			break;
		case BLEND_MODE_ADD:
			code += "blend_add";
			break;
		case BLEND_MODE_SUB:
			code += "blend_sub";
			break;
		case BLEND_MODE_MUL:
			code += "blend_mul";
			break;
		case BLEND_MODE_PREMULT_ALPHA:
			code += "blend_premul_alpha";
			break;
		case BLEND_MODE_DISABLED:
			code += "blend_disabled";
			break;
	}

	switch (light_mode) {
		case LIGHT_MODE_NORMAL:
			break;
		case LIGHT_MODE_UNSHADED:
			code += ",unshaded";
			break;
		case LIGHT_MODE_LIGHT_ONLY:
			code += ",light_only";
			break;
	}

	code += ";\n";

	if (particles_animation) {
		code += "uniform int particles_anim_h_frames;\n";
		code += "uniform int particles_anim_v_frames;\n";
		code += "uniform bool particles_anim_loop;\n";

		code += "void vertex() {\n";

		code += "\tfloat h_frames = float(particles_anim_h_frames);\n";
		code += "\tfloat v_frames = float(particles_anim_v_frames);\n";

		code += "\tVERTEX.xy /= vec2(h_frames, v_frames);\n";

		code += "\tfloat particle_total_frames = float(particles_anim_h_frames * particles_anim_v_frames);\n";
		code += "\tfloat particle_frame = floor(INSTANCE_CUSTOM.z * float(particle_total_frames));\n";
		code += "\tif (!particles_anim_loop) {\n";
		code += "\t\tparticle_frame = clamp(particle_frame, 0.0, particle_total_frames - 1.0);\n";
		code += "\t} else {\n";
		code += "\t\tparticle_frame = mod(particle_frame, particle_total_frames);\n";
		code += "\t}";
		code += "\tUV /= vec2(h_frames, v_frames);\n";
		code += "\tUV += vec2(mod(particle_frame, h_frames) / h_frames, floor((particle_frame + 0.5) / h_frames) / v_frames);\n";
		code += "}\n";
	}

	ShaderData shader_data;
	shader_data.shader = VS::get_singleton()->shader_create();
	shader_data.users = 1;

	VS::get_singleton()->shader_set_code(shader_data.shader, code);

	shader_map[mk] = shader_data;

	VS::get_singleton()->material_set_shader(_get_material(), shader_data.shader);
}

void CanvasItemMaterial::flush_changes() {
	material_mutex.lock();

	while (dirty_materials->first()) {
		dirty_materials->first()->self()->_update_shader();
	}

	material_mutex.unlock();
}

void CanvasItemMaterial::_queue_shader_change() {
	material_mutex.lock();

	if (is_initialized && !element.in_list()) {
		dirty_materials->add(&element);
	}

	material_mutex.unlock();
}

bool CanvasItemMaterial::_is_shader_dirty() const {
	bool dirty = false;

	material_mutex.lock();

	dirty = element.in_list();

	material_mutex.unlock();

	return dirty;
}
void CanvasItemMaterial::set_blend_mode(BlendMode p_blend_mode) {
	blend_mode = p_blend_mode;
	_queue_shader_change();
}

CanvasItemMaterial::BlendMode CanvasItemMaterial::get_blend_mode() const {
	return blend_mode;
}

void CanvasItemMaterial::set_light_mode(LightMode p_light_mode) {
	light_mode = p_light_mode;
	_queue_shader_change();
}

CanvasItemMaterial::LightMode CanvasItemMaterial::get_light_mode() const {
	return light_mode;
}

void CanvasItemMaterial::set_particles_animation(bool p_particles_anim) {
	particles_animation = p_particles_anim;
	_queue_shader_change();
	_change_notify();
}

bool CanvasItemMaterial::get_particles_animation() const {
	return particles_animation;
}

void CanvasItemMaterial::set_particles_anim_h_frames(int p_frames) {
	particles_anim_h_frames = p_frames;
	VS::get_singleton()->material_set_param(_get_material(), shader_names->particles_anim_h_frames, p_frames);
}

int CanvasItemMaterial::get_particles_anim_h_frames() const {
	return particles_anim_h_frames;
}
void CanvasItemMaterial::set_particles_anim_v_frames(int p_frames) {
	particles_anim_v_frames = p_frames;
	VS::get_singleton()->material_set_param(_get_material(), shader_names->particles_anim_v_frames, p_frames);
}

int CanvasItemMaterial::get_particles_anim_v_frames() const {
	return particles_anim_v_frames;
}

void CanvasItemMaterial::set_particles_anim_loop(bool p_loop) {
	particles_anim_loop = p_loop;
	VS::get_singleton()->material_set_param(_get_material(), shader_names->particles_anim_loop, particles_anim_loop);
}

bool CanvasItemMaterial::get_particles_anim_loop() const {
	return particles_anim_loop;
}

void CanvasItemMaterial::_validate_property(PropertyInfo &property) const {
	if (property.name.begins_with("particles_anim_") && !particles_animation) {
		property.usage = 0;
	}
}

RID CanvasItemMaterial::get_shader_rid() const {
	ERR_FAIL_COND_V(!shader_map.has(current_key), RID());
	return shader_map[current_key].shader;
}

Shader::Mode CanvasItemMaterial::get_shader_mode() const {
	return Shader::MODE_CANVAS_ITEM;
}

void CanvasItemMaterial::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_blend_mode", "blend_mode"), &CanvasItemMaterial::set_blend_mode);
	ClassDB::bind_method(D_METHOD("get_blend_mode"), &CanvasItemMaterial::get_blend_mode);

	ClassDB::bind_method(D_METHOD("set_light_mode", "light_mode"), &CanvasItemMaterial::set_light_mode);
	ClassDB::bind_method(D_METHOD("get_light_mode"), &CanvasItemMaterial::get_light_mode);

	ClassDB::bind_method(D_METHOD("set_particles_animation", "particles_anim"), &CanvasItemMaterial::set_particles_animation);
	ClassDB::bind_method(D_METHOD("get_particles_animation"), &CanvasItemMaterial::get_particles_animation);

	ClassDB::bind_method(D_METHOD("set_particles_anim_h_frames", "frames"), &CanvasItemMaterial::set_particles_anim_h_frames);
	ClassDB::bind_method(D_METHOD("get_particles_anim_h_frames"), &CanvasItemMaterial::get_particles_anim_h_frames);

	ClassDB::bind_method(D_METHOD("set_particles_anim_v_frames", "frames"), &CanvasItemMaterial::set_particles_anim_v_frames);
	ClassDB::bind_method(D_METHOD("get_particles_anim_v_frames"), &CanvasItemMaterial::get_particles_anim_v_frames);

	ClassDB::bind_method(D_METHOD("set_particles_anim_loop", "loop"), &CanvasItemMaterial::set_particles_anim_loop);
	ClassDB::bind_method(D_METHOD("get_particles_anim_loop"), &CanvasItemMaterial::get_particles_anim_loop);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "blend_mode", PROPERTY_HINT_ENUM, "Mix,Add,Sub,Mul,Premult Alpha"), "set_blend_mode", "get_blend_mode");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "light_mode", PROPERTY_HINT_ENUM, "Normal,Unshaded,Light Only"), "set_light_mode", "get_light_mode");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "particles_animation"), "set_particles_animation", "get_particles_animation");

	ADD_PROPERTY(PropertyInfo(Variant::INT, "particles_anim_h_frames", PROPERTY_HINT_RANGE, "1,128,1"), "set_particles_anim_h_frames", "get_particles_anim_h_frames");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "particles_anim_v_frames", PROPERTY_HINT_RANGE, "1,128,1"), "set_particles_anim_v_frames", "get_particles_anim_v_frames");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "particles_anim_loop"), "set_particles_anim_loop", "get_particles_anim_loop");

	BIND_ENUM_CONSTANT(BLEND_MODE_MIX);
	BIND_ENUM_CONSTANT(BLEND_MODE_ADD);
	BIND_ENUM_CONSTANT(BLEND_MODE_SUB);
	BIND_ENUM_CONSTANT(BLEND_MODE_MUL);
	BIND_ENUM_CONSTANT(BLEND_MODE_PREMULT_ALPHA);

	BIND_ENUM_CONSTANT(LIGHT_MODE_NORMAL);
	BIND_ENUM_CONSTANT(LIGHT_MODE_UNSHADED);
	BIND_ENUM_CONSTANT(LIGHT_MODE_LIGHT_ONLY);
}

CanvasItemMaterial::CanvasItemMaterial() :
		element(this) {
	blend_mode = BLEND_MODE_MIX;
	light_mode = LIGHT_MODE_NORMAL;
	particles_animation = false;

	set_particles_anim_h_frames(1);
	set_particles_anim_v_frames(1);
	set_particles_anim_loop(false);

	current_key.key = 0;
	current_key.invalid_key = 1;
	is_initialized = true;
	_queue_shader_change();
}

CanvasItemMaterial::~CanvasItemMaterial() {
	material_mutex.lock();

	if (shader_map.has(current_key)) {
		shader_map[current_key].users--;
		if (shader_map[current_key].users == 0) {
			//deallocate shader, as it's no longer in use
			VS::get_singleton()->free(shader_map[current_key].shader);
			shader_map.erase(current_key);
		}

		VS::get_singleton()->material_set_shader(_get_material(), RID());
	}

	material_mutex.unlock();
}

///////////////////////////////////////////////////////////////////
#ifdef TOOLS_ENABLED
bool CanvasItem::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {
	if (_edit_use_rect()) {
		return _edit_get_rect().has_point(p_point);
	} else {
		return p_point.length() < p_tolerance;
	}
}

Transform2D CanvasItem::_edit_get_transform() const {
	return Transform2D(_edit_get_rotation(), _edit_get_position() + _edit_get_pivot());
}
#endif

bool CanvasItem::is_visible_in_tree() const {
	if (!is_inside_tree()) {
		return false;
	}

	const CanvasItem *p = this;

	while (p) {
		if (!p->visible) {
			return false;
		}
		p = p->get_parent_item();
	}

	if (canvas_layer) {
		return canvas_layer->is_visible();
	}

	return true;
}

void CanvasItem::_toplevel_visibility_changed(bool p_visible) {
	VisualServer::get_singleton()->canvas_item_set_visible(canvas_item, visible && p_visible);

	if (visible) {
		_propagate_visibility_changed(p_visible);
	} else {
		notification(NOTIFICATION_VISIBILITY_CHANGED);
	}
}

void CanvasItem::_propagate_visibility_changed(bool p_visible) {
	if (p_visible && first_draw) { //avoid propagating it twice
		first_draw = false;
	}
	notification(NOTIFICATION_VISIBILITY_CHANGED);

	if (p_visible) {
		update(); // Todo optimize.
	} else {
		emit_signal(SceneStringNames::get_singleton()->hide);
	}
	_block();

	for (int i = 0; i < get_child_count(); i++) {
		CanvasItem *c = Object::cast_to<CanvasItem>(get_child(i));

		if (c && c->visible && !c->toplevel) {
			c->_propagate_visibility_changed(p_visible);
		}
	}

	_unblock();
}

void CanvasItem::set_visible(bool p_visible) {
	if (visible == p_visible) {
		return;
	}

	visible = p_visible;
	VisualServer::get_singleton()->canvas_item_set_visible(canvas_item, p_visible);

	if (!is_inside_tree()) {
		return;
	}

	_propagate_visibility_changed(p_visible);
	_change_notify("visible");
}

void CanvasItem::show() {
	set_visible(true);
}

void CanvasItem::hide() {
	set_visible(false);
}

bool CanvasItem::is_visible() const {
	return visible;
}

CanvasItem *CanvasItem::current_item_drawn = nullptr;
CanvasItem *CanvasItem::get_current_item_drawn() {
	return current_item_drawn;
}

void CanvasItem::_update_callback() {
	if (!is_inside_tree()) {
		pending_update = false;
		return;
	}

	VisualServer::get_singleton()->canvas_item_clear(get_canvas_item());
	//todo updating = true - only allow drawing here
	if (is_visible_in_tree()) { // Todo optimize this!!
		if (first_draw) {
			notification(NOTIFICATION_VISIBILITY_CHANGED);
			first_draw = false;
		}
		drawing = true;
		current_item_drawn = this;
		notification(NOTIFICATION_DRAW);
		emit_signal(SceneStringNames::get_singleton()->draw);
		if (get_script_instance()) {
			get_script_instance()->call_multilevel_reversed(SceneStringNames::get_singleton()->_draw, nullptr, 0);
		}
		current_item_drawn = nullptr;
		drawing = false;
	}
	//todo updating = false
	pending_update = false; // don't change to false until finished drawing (avoid recursive update)
}

Transform2D CanvasItem::get_global_transform_with_canvas() const {
	if (canvas_layer) {
		return canvas_layer->get_final_transform() * get_global_transform();
	} else if (is_inside_tree()) {
		return get_viewport()->get_canvas_transform() * get_global_transform();
	} else {
		return get_global_transform();
	}
}

Transform2D CanvasItem::get_global_transform() const {
	if (global_invalid) {
		const CanvasItem *pi = get_parent_item();
		if (pi) {
			global_transform = pi->get_global_transform() * get_transform();
		} else {
			global_transform = get_transform();
		}

		global_invalid = false;
	}

	return global_transform;
}

// Same as get_global_transform() but no reset for `global_invalid`.
Transform2D CanvasItem::get_global_transform_const() const {
	if (global_invalid) {
		const CanvasItem *pi = get_parent_item();
		if (pi) {
			global_transform = pi->get_global_transform_const() * get_transform();
		} else {
			global_transform = get_transform();
		}
	}

	return global_transform;
}

void CanvasItem::_toplevel_raise_self() {
	if (!is_inside_tree()) {
		return;
	}

	if (canvas_layer) {
		VisualServer::get_singleton()->canvas_item_set_draw_index(canvas_item, canvas_layer->get_sort_index());
	} else {
		VisualServer::get_singleton()->canvas_item_set_draw_index(canvas_item, get_viewport()->gui_get_canvas_sort_index());
	}
}

void CanvasItem::_enter_canvas() {
	if ((!Object::cast_to<CanvasItem>(get_parent())) || toplevel) {
		Node *n = this;

		canvas_layer = nullptr;

		while (n) {
			canvas_layer = Object::cast_to<CanvasLayer>(n);
			if (canvas_layer) {
				break;
			}
			if (Object::cast_to<Viewport>(n)) {
				break;
			}
			n = n->get_parent();
		}

		RID canvas;
		if (canvas_layer) {
			canvas = canvas_layer->get_canvas();
		} else {
			canvas = get_viewport()->find_world_2d()->get_canvas();
		}

		VisualServer::get_singleton()->canvas_item_set_parent(canvas_item, canvas);

		canvas_group = "root_canvas" + itos(canvas.get_id());

		add_to_group(canvas_group);
		if (canvas_layer) {
			canvas_layer->reset_sort_index();
		} else {
			get_viewport()->gui_reset_canvas_sort_index();
		}

		get_tree()->call_group_flags(SceneTree::GROUP_CALL_UNIQUE, canvas_group, "_toplevel_raise_self");

	} else {
		CanvasItem *parent = get_parent_item();
		canvas_layer = parent->canvas_layer;
		VisualServer::get_singleton()->canvas_item_set_parent(canvas_item, parent->get_canvas_item());
		VisualServer::get_singleton()->canvas_item_set_draw_index(canvas_item, get_index());
	}

	pending_update = false;
	update();

	notification(NOTIFICATION_ENTER_CANVAS);
}

void CanvasItem::_exit_canvas() {
	notification(NOTIFICATION_EXIT_CANVAS, true); //reverse the notification
	VisualServer::get_singleton()->canvas_item_set_parent(canvas_item, RID());
	canvas_layer = nullptr;
	if (canvas_group != "") {
		remove_from_group(canvas_group);
		canvas_group = "";
	}
}

void CanvasItem::_physics_interpolated_changed() {
	VisualServer::get_singleton()->canvas_item_set_interpolated(canvas_item, is_physics_interpolated());
}

void CanvasItem::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			ERR_FAIL_COND(!is_inside_tree());
			first_draw = true;

			Node *parent = get_parent();
			if (parent) {
				CanvasItem *ci = Object::cast_to<CanvasItem>(parent);
				if (ci) {
					C = ci->children_items.push_back(this);
				}
			}
			_enter_canvas();
			if (!block_transform_notify && !xform_change.in_list()) {
				get_tree()->xform_change_list.add(&xform_change);
			}

			// If using physics interpolation, reset for this node only,
			// as a helper, as in most cases, users will want items reset when
			// adding to the tree.
			// In cases where they move immediately after adding,
			// there will be little cost in having two resets as these are cheap,
			// and it is worth it for convenience.
			// Do not propagate to children, as each child of an added branch
			// receives its own NOTIFICATION_ENTER_TREE, and this would
			// cause unnecessary duplicate resets.
			if (is_physics_interpolated_and_enabled()) {
				notification(NOTIFICATION_RESET_PHYSICS_INTERPOLATION);
			}
		} break;
		case NOTIFICATION_EXIT_TREE: {
			if (xform_change.in_list()) {
				get_tree()->xform_change_list.remove(&xform_change);
			}
			_exit_canvas();
			if (C) {
				Object::cast_to<CanvasItem>(get_parent())->children_items.erase(C);
				C = nullptr;
			}
			global_invalid = true;
		} break;
		case NOTIFICATION_RESET_PHYSICS_INTERPOLATION: {
			if (is_visible_in_tree() && is_physics_interpolated()) {
				VisualServer::get_singleton()->canvas_item_reset_physics_interpolation(canvas_item);
			}
		} break;

		case NOTIFICATION_DRAW:
		case NOTIFICATION_TRANSFORM_CHANGED: {
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			emit_signal(SceneStringNames::get_singleton()->visibility_changed);
		} break;
	}
}

#ifdef DEV_ENABLED
void CanvasItem::_name_changed_notify() {
	// Even in DEV builds, there is no point in calling this unless we are debugging
	// canvas item names. Even calling the stub function will be expensive, as there
	// are a lot of canvas items.
#ifdef VISUAL_SERVER_CANVAS_DEBUG_ITEM_NAMES
	VisualServer::get_singleton()->canvas_item_set_name(canvas_item, get_name());
#endif
}
#endif

void CanvasItem::update_draw_order() {
	if (!is_inside_tree()) {
		return;
	}

	if (canvas_group != "") {
		get_tree()->call_group_flags(SceneTree::GROUP_CALL_UNIQUE, canvas_group, "_toplevel_raise_self");
	} else {
		CanvasItem *p = get_parent_item();
		ERR_FAIL_NULL(p);
		VisualServer::get_singleton()->canvas_item_set_draw_index(canvas_item, get_index());
	}
}

void CanvasItem::update() {
	if (!is_inside_tree()) {
		return;
	}
	if (pending_update) {
		return;
	}

	pending_update = true;

	MessageQueue::get_singleton()->push_call(this, "_update_callback");
}

void CanvasItem::set_modulate(const Color &p_modulate) {
	if (modulate == p_modulate) {
		return;
	}

	modulate = p_modulate;
	VisualServer::get_singleton()->canvas_item_set_modulate(canvas_item, modulate);
}
Color CanvasItem::get_modulate() const {
	return modulate;
}

void CanvasItem::set_as_toplevel(bool p_toplevel) {
	if (toplevel == p_toplevel) {
		return;
	}

	if (!is_inside_tree()) {
		toplevel = p_toplevel;
		return;
	}

	_exit_canvas();
	toplevel = p_toplevel;
	_enter_canvas();

	_notify_transform();
}

bool CanvasItem::is_set_as_toplevel() const {
	return toplevel;
}

CanvasItem *CanvasItem::get_parent_item() const {
	if (toplevel) {
		return nullptr;
	}

	return Object::cast_to<CanvasItem>(get_parent());
}

void CanvasItem::set_self_modulate(const Color &p_self_modulate) {
	if (self_modulate == p_self_modulate) {
		return;
	}

	self_modulate = p_self_modulate;
	VisualServer::get_singleton()->canvas_item_set_self_modulate(canvas_item, self_modulate);
}
Color CanvasItem::get_self_modulate() const {
	return self_modulate;
}

void CanvasItem::set_light_mask(int p_light_mask) {
	if (light_mask == p_light_mask) {
		return;
	}

	light_mask = p_light_mask;
	VS::get_singleton()->canvas_item_set_light_mask(canvas_item, p_light_mask);
}

int CanvasItem::get_light_mask() const {
	return light_mask;
}

void CanvasItem::set_canvas_item_use_identity_transform(bool p_enable) {
	// Prevent sending item transforms to VisualServer when using global coords.
	_set_use_identity_transform(p_enable);

	// Let VisualServer know not to concatenate the parent transform during the render.
	VisualServer::get_singleton()->canvas_item_set_use_identity_transform(get_canvas_item(), p_enable);

	if (is_inside_tree()) {
		if (p_enable) {
			// Make sure item is using identity transform in server.
			VisualServer::get_singleton()->canvas_item_set_transform(get_canvas_item(), Transform2D());
		} else {
			// Make sure item transform is up to date in server if switching identity transform off.
			VisualServer::get_singleton()->canvas_item_set_transform(get_canvas_item(), get_transform());
		}
	}
}

void CanvasItem::item_rect_changed(bool p_size_changed) {
	if (p_size_changed) {
		update();
	}
	emit_signal(SceneStringNames::get_singleton()->item_rect_changed);
}

void CanvasItem::draw_line(const Point2 &p_from, const Point2 &p_to, const Color &p_color, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	VisualServer::get_singleton()->canvas_item_add_line(canvas_item, p_from, p_to, p_color, p_width, p_antialiased);
}

void CanvasItem::draw_polyline(const Vector<Point2> &p_points, const Color &p_color, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	Vector<Color> colors;
	colors.push_back(p_color);
	VisualServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, colors, p_width, p_antialiased);
}

void CanvasItem::draw_polyline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	VisualServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, p_colors, p_width, p_antialiased);
}

void CanvasItem::draw_arc(const Vector2 &p_center, float p_radius, float p_start_angle, float p_end_angle, int p_point_count, const Color &p_color, float p_width, bool p_antialiased) {
	Vector<Point2> points;
	points.resize(p_point_count);
	const float delta_angle = p_end_angle - p_start_angle;
	for (int i = 0; i < p_point_count; i++) {
		float theta = (i / (p_point_count - 1.0f)) * delta_angle + p_start_angle;
		points.set(i, p_center + Vector2(Math::cos(theta), Math::sin(theta)) * p_radius);
	}

	draw_polyline(points, p_color, p_width, p_antialiased);
}

void CanvasItem::draw_multiline(const Vector<Point2> &p_points, const Color &p_color, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	Vector<Color> colors;
	colors.push_back(p_color);
	VisualServer::get_singleton()->canvas_item_add_multiline(canvas_item, p_points, colors, p_width, p_antialiased);
}

void CanvasItem::draw_multiline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	VisualServer::get_singleton()->canvas_item_add_multiline(canvas_item, p_points, p_colors, p_width, p_antialiased);
}

void CanvasItem::draw_rect(const Rect2 &p_rect, const Color &p_color, bool p_filled, float p_width, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	if (p_filled) {
		if (p_width != 1.0) {
			WARN_PRINT("The draw_rect() \"width\" argument has no effect when \"filled\" is \"true\".");
		}

		if (p_antialiased) {
			WARN_PRINT("The draw_rect() \"antialiased\" argument has no effect when \"filled\" is \"true\".");
		}

		VisualServer::get_singleton()->canvas_item_add_rect(canvas_item, p_rect, p_color);
	} else {
		// Thick lines are offset depending on their width to avoid partial overlapping.
		// Thin lines don't require an offset, so don't apply one in this case
		float offset;
		if (p_width >= 2) {
			offset = p_width / 2.0;
		} else {
			offset = 0.0;
		}

		VisualServer::get_singleton()->canvas_item_add_line(
				canvas_item,
				p_rect.position + Size2(-offset, 0),
				p_rect.position + Size2(p_rect.size.width + offset, 0),
				p_color,
				p_width,
				p_antialiased);
		VisualServer::get_singleton()->canvas_item_add_line(
				canvas_item,
				p_rect.position + Size2(p_rect.size.width, offset),
				p_rect.position + Size2(p_rect.size.width, p_rect.size.height - offset),
				p_color,
				p_width,
				p_antialiased);
		VisualServer::get_singleton()->canvas_item_add_line(
				canvas_item,
				p_rect.position + Size2(p_rect.size.width + offset, p_rect.size.height),
				p_rect.position + Size2(-offset, p_rect.size.height),
				p_color,
				p_width,
				p_antialiased);
		VisualServer::get_singleton()->canvas_item_add_line(
				canvas_item,
				p_rect.position + Size2(0, p_rect.size.height - offset),
				p_rect.position + Size2(0, offset),
				p_color,
				p_width,
				p_antialiased);
	}
}

void CanvasItem::draw_circle(const Point2 &p_pos, float p_radius, const Color &p_color) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	VisualServer::get_singleton()->canvas_item_add_circle(canvas_item, p_pos, p_radius, p_color);
}

void CanvasItem::draw_texture(const Ref<Texture> &p_texture, const Point2 &p_pos, const Color &p_modulate, const Ref<Texture> &p_normal_map) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	ERR_FAIL_COND(p_texture.is_null());

	p_texture->draw(canvas_item, p_pos, p_modulate, false, p_normal_map);
}

void CanvasItem::draw_texture_rect(const Ref<Texture> &p_texture, const Rect2 &p_rect, bool p_tile, const Color &p_modulate, bool p_transpose, const Ref<Texture> &p_normal_map) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	ERR_FAIL_COND(p_texture.is_null());
	p_texture->draw_rect(canvas_item, p_rect, p_tile, p_modulate, p_transpose, p_normal_map);
}
void CanvasItem::draw_texture_rect_region(const Ref<Texture> &p_texture, const Rect2 &p_rect, const Rect2 &p_src_rect, const Color &p_modulate, bool p_transpose, const Ref<Texture> &p_normal_map, bool p_clip_uv) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");
	ERR_FAIL_COND(p_texture.is_null());
	p_texture->draw_rect_region(canvas_item, p_rect, p_src_rect, p_modulate, p_transpose, p_normal_map, p_clip_uv);
}

void CanvasItem::draw_style_box(const Ref<StyleBox> &p_style_box, const Rect2 &p_rect) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	ERR_FAIL_COND(p_style_box.is_null());

	p_style_box->draw(canvas_item, p_rect);
}
void CanvasItem::draw_primitive(const Vector<Point2> &p_points, const Vector<Color> &p_colors, const Vector<Point2> &p_uvs, Ref<Texture> p_texture, float p_width, const Ref<Texture> &p_normal_map) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	RID rid = p_texture.is_valid() ? p_texture->get_rid() : RID();
	RID rid_normal = p_normal_map.is_valid() ? p_normal_map->get_rid() : RID();

	VisualServer::get_singleton()->canvas_item_add_primitive(canvas_item, p_points, p_colors, p_uvs, rid, p_width, rid_normal);
}
void CanvasItem::draw_set_transform(const Point2 &p_offset, float p_rot, const Size2 &p_scale) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	Transform2D xform(p_rot, p_offset);
	xform.scale_basis(p_scale);
	VisualServer::get_singleton()->canvas_item_add_set_transform(canvas_item, xform);
}

void CanvasItem::draw_set_transform_matrix(const Transform2D &p_matrix) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	VisualServer::get_singleton()->canvas_item_add_set_transform(canvas_item, p_matrix);
}

void CanvasItem::draw_polygon(const Vector<Point2> &p_points, const Vector<Color> &p_colors, const Vector<Point2> &p_uvs, Ref<Texture> p_texture, const Ref<Texture> &p_normal_map, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	RID rid = p_texture.is_valid() ? p_texture->get_rid() : RID();
	RID rid_normal = p_normal_map.is_valid() ? p_normal_map->get_rid() : RID();

	VisualServer::get_singleton()->canvas_item_add_polygon(canvas_item, p_points, p_colors, p_uvs, rid, rid_normal, p_antialiased);
}

void CanvasItem::draw_colored_polygon(const Vector<Point2> &p_points, const Color &p_color, const Vector<Point2> &p_uvs, Ref<Texture> p_texture, const Ref<Texture> &p_normal_map, bool p_antialiased) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	Vector<Color> colors;
	colors.push_back(p_color);
	RID rid = p_texture.is_valid() ? p_texture->get_rid() : RID();
	RID rid_normal = p_normal_map.is_valid() ? p_normal_map->get_rid() : RID();

	VisualServer::get_singleton()->canvas_item_add_polygon(canvas_item, p_points, colors, p_uvs, rid, rid_normal, p_antialiased);
}

void CanvasItem::draw_mesh(const Ref<Mesh> &p_mesh, const Ref<Texture> &p_texture, const Ref<Texture> &p_normal_map, const Transform2D &p_transform, const Color &p_modulate) {
	ERR_FAIL_COND(p_mesh.is_null());
	RID texture_rid = p_texture.is_valid() ? p_texture->get_rid() : RID();
	RID normal_map_rid = p_normal_map.is_valid() ? p_normal_map->get_rid() : RID();

	VisualServer::get_singleton()->canvas_item_add_mesh(canvas_item, p_mesh->get_rid(), p_transform, p_modulate, texture_rid, normal_map_rid);
}
void CanvasItem::draw_multimesh(const Ref<MultiMesh> &p_multimesh, const Ref<Texture> &p_texture, const Ref<Texture> &p_normal_map) {
	ERR_FAIL_COND(p_multimesh.is_null());
	RID texture_rid = p_texture.is_valid() ? p_texture->get_rid() : RID();
	RID normal_map_rid = p_normal_map.is_valid() ? p_normal_map->get_rid() : RID();
	VisualServer::get_singleton()->canvas_item_add_multimesh(canvas_item, p_multimesh->get_rid(), texture_rid, normal_map_rid);
}

void CanvasItem::select_font(const Ref<Font> &p_font) {
	// Purely to keep canvas item SDF state up to date for now.
	bool new_font_sdf_selected = p_font.is_valid() && p_font->is_distance_field_hint();

	if (font_sdf_selected != new_font_sdf_selected) {
		ERR_FAIL_COND(!get_canvas_item().is_valid());
		font_sdf_selected = new_font_sdf_selected;
		VisualServer::get_singleton()->canvas_item_set_distance_field_mode(get_canvas_item(), font_sdf_selected);
	}
}

void CanvasItem::draw_string(const Ref<Font> &p_font, const Point2 &p_pos, const String &p_text, const Color &p_modulate, int p_clip_w) {
	ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	ERR_FAIL_COND(p_font.is_null());
	p_font->draw(canvas_item, p_pos, p_text, p_modulate, p_clip_w);
}

float CanvasItem::draw_char(const Ref<Font> &p_font, const Point2 &p_pos, const String &p_char, const String &p_next, const Color &p_modulate) {
	ERR_FAIL_COND_V_MSG(!drawing, 0, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");

	ERR_FAIL_COND_V(p_char.length() != 1, 0);
	ERR_FAIL_COND_V(p_font.is_null(), 0);

	if (p_font->has_outline()) {
		p_font->draw_char(canvas_item, p_pos, p_char[0], p_next.c_str()[0], Color(1, 1, 1), true);
	}
	return p_font->draw_char(canvas_item, p_pos, p_char[0], p_next.c_str()[0], p_modulate);
}

void CanvasItem::_notify_transform(CanvasItem *p_node) {
	/* This check exists to avoid re-propagating the transform
	 * notification down the tree on dirty nodes. It provides
	 * optimization by avoiding redundancy (nodes are dirty, will get the
	 * notification anyway).
	 */

	if (/*p_node->xform_change.in_list() &&*/ p_node->global_invalid) {
		return; //nothing to do
	}

	p_node->global_invalid = true;

	if (p_node->notify_transform && !p_node->xform_change.in_list()) {
		if (!p_node->block_transform_notify) {
			if (p_node->is_inside_tree()) {
				get_tree()->xform_change_list.add(&p_node->xform_change);
			}
		}
	}

	for (List<CanvasItem *>::Element *E = p_node->children_items.front(); E; E = E->next()) {
		CanvasItem *ci = E->get();
		if (ci->toplevel) {
			continue;
		}
		_notify_transform(ci);
	}
}

Rect2 CanvasItem::get_viewport_rect() const {
	ERR_FAIL_COND_V(!is_inside_tree(), Rect2());
	return get_viewport()->get_visible_rect();
}

RID CanvasItem::get_canvas() const {
	ERR_FAIL_COND_V(!is_inside_tree(), RID());

	if (canvas_layer) {
		return canvas_layer->get_canvas();
	} else {
		return get_viewport()->find_world_2d()->get_canvas();
	}
}

ObjectID CanvasItem::get_canvas_layer_instance_id() const {
	if (canvas_layer) {
		return canvas_layer->get_instance_id();
	} else {
		return 0;
	}
}

CanvasItem *CanvasItem::get_toplevel() const {
	CanvasItem *ci = const_cast<CanvasItem *>(this);
	while (!ci->toplevel && Object::cast_to<CanvasItem>(ci->get_parent())) {
		ci = Object::cast_to<CanvasItem>(ci->get_parent());
	}

	return ci;
}

Ref<World2D> CanvasItem::get_world_2d() const {
	ERR_FAIL_COND_V(!is_inside_tree(), Ref<World2D>());

	CanvasItem *tl = get_toplevel();

	if (tl->get_viewport()) {
		return tl->get_viewport()->find_world_2d();
	} else {
		return Ref<World2D>();
	}
}

RID CanvasItem::get_viewport_rid() const {
	ERR_FAIL_COND_V(!is_inside_tree(), RID());
	return get_viewport()->get_viewport_rid();
}

void CanvasItem::set_block_transform_notify(bool p_enable) {
	block_transform_notify = p_enable;
}

bool CanvasItem::is_block_transform_notify_enabled() const {
	return block_transform_notify;
}

void CanvasItem::set_draw_behind_parent(bool p_enable) {
	if (behind == p_enable) {
		return;
	}
	behind = p_enable;
	VisualServer::get_singleton()->canvas_item_set_draw_behind_parent(canvas_item, behind);
}

bool CanvasItem::is_draw_behind_parent_enabled() const {
	return behind;
}

void CanvasItem::set_material(const Ref<Material> &p_material) {
	material = p_material;
	RID rid;
	if (material.is_valid()) {
		rid = material->get_rid();
	}
	VS::get_singleton()->canvas_item_set_material(canvas_item, rid);
	_change_notify(); //properties for material exposed
}

void CanvasItem::set_use_parent_material(bool p_use_parent_material) {
	use_parent_material = p_use_parent_material;
	VS::get_singleton()->canvas_item_set_use_parent_material(canvas_item, p_use_parent_material);
}

bool CanvasItem::get_use_parent_material() const {
	return use_parent_material;
}

Ref<Material> CanvasItem::get_material() const {
	return material;
}

Vector2 CanvasItem::make_canvas_position_local(const Vector2 &screen_point) const {
	ERR_FAIL_COND_V(!is_inside_tree(), screen_point);

	Transform2D local_matrix = (get_canvas_transform() * get_global_transform()).affine_inverse();

	return local_matrix.xform(screen_point);
}

Ref<InputEvent> CanvasItem::make_input_local(const Ref<InputEvent> &p_event) const {
	ERR_FAIL_COND_V(p_event.is_null(), p_event);
	ERR_FAIL_COND_V(!is_inside_tree(), p_event);

	return p_event->xformed_by((get_canvas_transform() * get_global_transform()).affine_inverse());
}

Vector2 CanvasItem::get_global_mouse_position() const {
	ERR_FAIL_COND_V(!get_viewport(), Vector2());
	return get_canvas_transform().affine_inverse().xform(get_viewport()->get_mouse_position());
}

Vector2 CanvasItem::get_local_mouse_position() const {
	ERR_FAIL_COND_V(!get_viewport(), Vector2());

	return get_global_transform().affine_inverse().xform(get_global_mouse_position());
}

void CanvasItem::force_update_transform() {
	ERR_FAIL_COND(!is_inside_tree());
	if (!xform_change.in_list()) {
		return;
	}

	get_tree()->xform_change_list.remove(&xform_change);

	notification(NOTIFICATION_TRANSFORM_CHANGED);
}

void CanvasItem::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_toplevel_visibility_changed", "visible"), &CanvasItem::_toplevel_visibility_changed);
	ClassDB::bind_method(D_METHOD("_toplevel_raise_self"), &CanvasItem::_toplevel_raise_self);
	ClassDB::bind_method(D_METHOD("_update_callback"), &CanvasItem::_update_callback);

#ifdef TOOLS_ENABLED
	ClassDB::bind_method(D_METHOD("_edit_set_state", "state"), &CanvasItem::_edit_set_state);
	ClassDB::bind_method(D_METHOD("_edit_get_state"), &CanvasItem::_edit_get_state);
	ClassDB::bind_method(D_METHOD("_edit_set_position", "position"), &CanvasItem::_edit_set_position);
	ClassDB::bind_method(D_METHOD("_edit_get_position"), &CanvasItem::_edit_get_position);
	ClassDB::bind_method(D_METHOD("_edit_set_scale", "scale"), &CanvasItem::_edit_set_scale);
	ClassDB::bind_method(D_METHOD("_edit_get_scale"), &CanvasItem::_edit_get_scale);
	ClassDB::bind_method(D_METHOD("_edit_set_rect", "rect"), &CanvasItem::_edit_set_rect);
	ClassDB::bind_method(D_METHOD("_edit_get_rect"), &CanvasItem::_edit_get_rect);
	ClassDB::bind_method(D_METHOD("_edit_use_rect"), &CanvasItem::_edit_use_rect);
	ClassDB::bind_method(D_METHOD("_edit_set_rotation", "degrees"), &CanvasItem::_edit_set_rotation);
	ClassDB::bind_method(D_METHOD("_edit_get_rotation"), &CanvasItem::_edit_get_rotation);
	ClassDB::bind_method(D_METHOD("_edit_use_rotation"), &CanvasItem::_edit_use_rotation);
	ClassDB::bind_method(D_METHOD("_edit_set_pivot", "pivot"), &CanvasItem::_edit_set_pivot);
	ClassDB::bind_method(D_METHOD("_edit_get_pivot"), &CanvasItem::_edit_get_pivot);
	ClassDB::bind_method(D_METHOD("_edit_use_pivot"), &CanvasItem::_edit_use_pivot);
	ClassDB::bind_method(D_METHOD("_edit_get_transform"), &CanvasItem::_edit_get_transform);
#endif

	ClassDB::bind_method(D_METHOD("get_canvas_item"), &CanvasItem::get_canvas_item);

	ClassDB::bind_method(D_METHOD("set_visible", "visible"), &CanvasItem::set_visible);
	ClassDB::bind_method(D_METHOD("is_visible"), &CanvasItem::is_visible);
	ClassDB::bind_method(D_METHOD("is_visible_in_tree"), &CanvasItem::is_visible_in_tree);
	ClassDB::bind_method(D_METHOD("show"), &CanvasItem::show);
	ClassDB::bind_method(D_METHOD("hide"), &CanvasItem::hide);

	ClassDB::bind_method(D_METHOD("update"), &CanvasItem::update);

	ClassDB::bind_method(D_METHOD("set_as_toplevel", "enable"), &CanvasItem::set_as_toplevel);
	ClassDB::bind_method(D_METHOD("is_set_as_toplevel"), &CanvasItem::is_set_as_toplevel);

	ClassDB::bind_method(D_METHOD("set_light_mask", "light_mask"), &CanvasItem::set_light_mask);
	ClassDB::bind_method(D_METHOD("get_light_mask"), &CanvasItem::get_light_mask);

	ClassDB::bind_method(D_METHOD("set_modulate", "modulate"), &CanvasItem::set_modulate);
	ClassDB::bind_method(D_METHOD("get_modulate"), &CanvasItem::get_modulate);
	ClassDB::bind_method(D_METHOD("set_self_modulate", "self_modulate"), &CanvasItem::set_self_modulate);
	ClassDB::bind_method(D_METHOD("get_self_modulate"), &CanvasItem::get_self_modulate);

	ClassDB::bind_method(D_METHOD("set_draw_behind_parent", "enable"), &CanvasItem::set_draw_behind_parent);
	ClassDB::bind_method(D_METHOD("is_draw_behind_parent_enabled"), &CanvasItem::is_draw_behind_parent_enabled);

	ClassDB::bind_method(D_METHOD("_set_on_top", "on_top"), &CanvasItem::_set_on_top);
	ClassDB::bind_method(D_METHOD("_is_on_top"), &CanvasItem::_is_on_top);
	//ClassDB::bind_method(D_METHOD("get_transform"),&CanvasItem::get_transform);

	ClassDB::bind_method(D_METHOD("draw_line", "from", "to", "color", "width", "antialiased"), &CanvasItem::draw_line, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_polyline", "points", "color", "width", "antialiased"), &CanvasItem::draw_polyline, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_polyline_colors", "points", "colors", "width", "antialiased"), &CanvasItem::draw_polyline_colors, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_arc", "center", "radius", "start_angle", "end_angle", "point_count", "color", "width", "antialiased"), &CanvasItem::draw_arc, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_multiline", "points", "color", "width", "antialiased"), &CanvasItem::draw_multiline, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_multiline_colors", "points", "colors", "width", "antialiased"), &CanvasItem::draw_multiline_colors, DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_rect", "rect", "color", "filled", "width", "antialiased"), &CanvasItem::draw_rect, DEFVAL(true), DEFVAL(1.0), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_circle", "position", "radius", "color"), &CanvasItem::draw_circle);
	ClassDB::bind_method(D_METHOD("draw_texture", "texture", "position", "modulate", "normal_map"), &CanvasItem::draw_texture, DEFVAL(Color(1, 1, 1, 1)), DEFVAL(Variant()));
	ClassDB::bind_method(D_METHOD("draw_texture_rect", "texture", "rect", "tile", "modulate", "transpose", "normal_map"), &CanvasItem::draw_texture_rect, DEFVAL(Color(1, 1, 1)), DEFVAL(false), DEFVAL(Variant()));
	ClassDB::bind_method(D_METHOD("draw_texture_rect_region", "texture", "rect", "src_rect", "modulate", "transpose", "normal_map", "clip_uv"), &CanvasItem::draw_texture_rect_region, DEFVAL(Color(1, 1, 1)), DEFVAL(false), DEFVAL(Variant()), DEFVAL(true));
	ClassDB::bind_method(D_METHOD("draw_style_box", "style_box", "rect"), &CanvasItem::draw_style_box);
	ClassDB::bind_method(D_METHOD("draw_primitive", "points", "colors", "uvs", "texture", "width", "normal_map"), &CanvasItem::draw_primitive, DEFVAL(Variant()), DEFVAL(1.0), DEFVAL(Variant()));
	ClassDB::bind_method(D_METHOD("draw_polygon", "points", "colors", "uvs", "texture", "normal_map", "antialiased"), &CanvasItem::draw_polygon, DEFVAL(PoolVector2Array()), DEFVAL(Variant()), DEFVAL(Variant()), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_colored_polygon", "points", "color", "uvs", "texture", "normal_map", "antialiased"), &CanvasItem::draw_colored_polygon, DEFVAL(PoolVector2Array()), DEFVAL(Variant()), DEFVAL(Variant()), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("draw_string", "font", "position", "text", "modulate", "clip_w"), &CanvasItem::draw_string, DEFVAL(Color(1, 1, 1)), DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("draw_char", "font", "position", "char", "next", "modulate"), &CanvasItem::draw_char, DEFVAL(Color(1, 1, 1)));
	ClassDB::bind_method(D_METHOD("draw_mesh", "mesh", "texture", "normal_map", "transform", "modulate"), &CanvasItem::draw_mesh, DEFVAL(Ref<Texture>()), DEFVAL(Transform2D()), DEFVAL(Color(1, 1, 1)));
	ClassDB::bind_method(D_METHOD("draw_multimesh", "multimesh", "texture", "normal_map"), &CanvasItem::draw_multimesh, DEFVAL(Ref<Texture>()));

	ClassDB::bind_method(D_METHOD("draw_set_transform", "position", "rotation", "scale"), &CanvasItem::draw_set_transform);
	ClassDB::bind_method(D_METHOD("draw_set_transform_matrix", "xform"), &CanvasItem::draw_set_transform_matrix);
	ClassDB::bind_method(D_METHOD("get_transform"), &CanvasItem::get_transform);
	ClassDB::bind_method(D_METHOD("get_global_transform"), &CanvasItem::get_global_transform);
	ClassDB::bind_method(D_METHOD("get_global_transform_with_canvas"), &CanvasItem::get_global_transform_with_canvas);
	ClassDB::bind_method(D_METHOD("get_viewport_transform"), &CanvasItem::get_viewport_transform);
	ClassDB::bind_method(D_METHOD("get_viewport_rect"), &CanvasItem::get_viewport_rect);
	ClassDB::bind_method(D_METHOD("get_canvas_transform"), &CanvasItem::get_canvas_transform);
	ClassDB::bind_method(D_METHOD("get_local_mouse_position"), &CanvasItem::get_local_mouse_position);
	ClassDB::bind_method(D_METHOD("get_global_mouse_position"), &CanvasItem::get_global_mouse_position);
	ClassDB::bind_method(D_METHOD("get_canvas"), &CanvasItem::get_canvas);
	ClassDB::bind_method(D_METHOD("get_world_2d"), &CanvasItem::get_world_2d);
	//ClassDB::bind_method(D_METHOD("get_viewport"),&CanvasItem::get_viewport);

	ClassDB::bind_method(D_METHOD("set_material", "material"), &CanvasItem::set_material);
	ClassDB::bind_method(D_METHOD("get_material"), &CanvasItem::get_material);

	ClassDB::bind_method(D_METHOD("set_use_parent_material", "enable"), &CanvasItem::set_use_parent_material);
	ClassDB::bind_method(D_METHOD("get_use_parent_material"), &CanvasItem::get_use_parent_material);

	ClassDB::bind_method(D_METHOD("set_notify_local_transform", "enable"), &CanvasItem::set_notify_local_transform);
	ClassDB::bind_method(D_METHOD("is_local_transform_notification_enabled"), &CanvasItem::is_local_transform_notification_enabled);

	ClassDB::bind_method(D_METHOD("set_notify_transform", "enable"), &CanvasItem::set_notify_transform);
	ClassDB::bind_method(D_METHOD("is_transform_notification_enabled"), &CanvasItem::is_transform_notification_enabled);

	ClassDB::bind_method(D_METHOD("force_update_transform"), &CanvasItem::force_update_transform);

	ClassDB::bind_method(D_METHOD("make_canvas_position_local", "screen_point"), &CanvasItem::make_canvas_position_local);
	ClassDB::bind_method(D_METHOD("make_input_local", "event"), &CanvasItem::make_input_local);

	BIND_VMETHOD(MethodInfo("_draw"));

	ADD_GROUP("Visibility", "");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "visible"), "set_visible", "is_visible");
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "modulate"), "set_modulate", "get_modulate");
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "self_modulate"), "set_self_modulate", "get_self_modulate");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_behind_parent"), "set_draw_behind_parent", "is_draw_behind_parent_enabled");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_on_top", PROPERTY_HINT_NONE, "", 0), "_set_on_top", "_is_on_top"); //compatibility
	ADD_PROPERTY(PropertyInfo(Variant::INT, "light_mask", PROPERTY_HINT_LAYERS_2D_RENDER), "set_light_mask", "get_light_mask");

	ADD_GROUP("Material", "");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "ShaderMaterial,CanvasItemMaterial"), "set_material", "get_material");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_parent_material"), "set_use_parent_material", "get_use_parent_material");
	//exporting these things doesn't really make much sense i think
	// ADD_PROPERTY(PropertyInfo(Variant::BOOL, "toplevel", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_as_toplevel", "is_set_as_toplevel");
	// ADD_PROPERTY(PropertyInfo(Variant::BOOL,"transform/notify"),"set_transform_notify","is_transform_notify_enabled");

	ADD_SIGNAL(MethodInfo("draw"));
	ADD_SIGNAL(MethodInfo("visibility_changed"));
	ADD_SIGNAL(MethodInfo("hide"));
	ADD_SIGNAL(MethodInfo("item_rect_changed"));

	BIND_ENUM_CONSTANT(BLEND_MODE_MIX);
	BIND_ENUM_CONSTANT(BLEND_MODE_ADD);
	BIND_ENUM_CONSTANT(BLEND_MODE_SUB);
	BIND_ENUM_CONSTANT(BLEND_MODE_MUL);
	BIND_ENUM_CONSTANT(BLEND_MODE_PREMULT_ALPHA);
	BIND_ENUM_CONSTANT(BLEND_MODE_DISABLED);

	BIND_CONSTANT(NOTIFICATION_TRANSFORM_CHANGED);
	BIND_CONSTANT(NOTIFICATION_LOCAL_TRANSFORM_CHANGED);
	BIND_CONSTANT(NOTIFICATION_DRAW);
	BIND_CONSTANT(NOTIFICATION_VISIBILITY_CHANGED);
	BIND_CONSTANT(NOTIFICATION_ENTER_CANVAS);
	BIND_CONSTANT(NOTIFICATION_EXIT_CANVAS);
}

Transform2D CanvasItem::get_canvas_transform() const {
	ERR_FAIL_COND_V(!is_inside_tree(), Transform2D());

	if (canvas_layer) {
		return canvas_layer->get_final_transform();
	} else if (Object::cast_to<CanvasItem>(get_parent())) {
		return Object::cast_to<CanvasItem>(get_parent())->get_canvas_transform();
	} else {
		return get_viewport()->get_canvas_transform();
	}
}

Transform2D CanvasItem::get_viewport_transform() const {
	ERR_FAIL_COND_V(!is_inside_tree(), Transform2D());

	if (canvas_layer) {
		if (get_viewport()) {
			return get_viewport()->get_final_transform() * canvas_layer->get_final_transform();
		} else {
			return canvas_layer->get_final_transform();
		}

	} else {
		return get_viewport()->get_final_transform() * get_viewport()->get_canvas_transform();
	}
}

void CanvasItem::set_notify_local_transform(bool p_enable) {
	notify_local_transform = p_enable;
}

bool CanvasItem::is_local_transform_notification_enabled() const {
	return notify_local_transform;
}

void CanvasItem::set_notify_transform(bool p_enable) {
	if (notify_transform == p_enable) {
		return;
	}

	notify_transform = p_enable;

	if (notify_transform && is_inside_tree()) {
		//this ensures that invalid globals get resolved, so notifications can be received
		_ALLOW_DISCARD_ get_global_transform();
	}
}

bool CanvasItem::is_transform_notification_enabled() const {
	return notify_transform;
}

int CanvasItem::get_canvas_layer() const {
	if (canvas_layer) {
		return canvas_layer->get_layer();
	} else {
		return 0;
	}
}

CanvasItem::CanvasItem() :
		xform_change(this) {
	canvas_item = RID_PRIME(VisualServer::get_singleton()->canvas_item_create());
<--- Variable 'canvas_item' is assigned in constructor body. Consider performing initialization in initialization list. [+]
When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'canvas_item' a value by passing the value to the constructor in the initialization list.
	visible = true;
	pending_update = false;
	modulate = Color(1, 1, 1, 1);
	self_modulate = Color(1, 1, 1, 1);
	toplevel = false;
	first_draw = false;
	drawing = false;
	behind = false;
	block_transform_notify = false;
	//viewport=NULL;
	canvas_layer = nullptr;
	use_parent_material = false;
	global_invalid = true;
	notify_local_transform = false;
	notify_transform = false;
	font_sdf_selected = false;
	light_mask = 1;

	C = nullptr;
}

CanvasItem::~CanvasItem() {
	VisualServer::get_singleton()->free(canvas_item);
}