/*************************************************************************/
/*  parallax_background.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* 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   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
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/*************************************************************************/
#ifndef PARALLAX_BACKGROUND_H
#define PARALLAX_BACKGROUND_H

#include "scene/2d/camera_2d.h"
#include "scene/2d/node_2d.h"
#include "scene/main/canvas_layer.h"

class ParallaxBackground : public CanvasLayer {

	OBJ_TYPE(ParallaxBackground, CanvasLayer);

	Point2 offset;
	float scale;
	Point2 base_offset;
	Point2 base_scale;
	String group_name;
	Point2 limit_begin;
	Point2 limit_end;
	Point2 final_offset;
	bool ignore_camera_zoom;

	void _update_scroll();

protected:
	void _camera_moved(const Matrix32 &p_transform);

	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_scroll_offset(const Point2 &p_ofs);
	Point2 get_scroll_offset() const;

	void set_scroll_scale(float p_ofs);
	float get_scroll_scale() const;

	void set_scroll_base_offset(const Point2 &p_ofs);
	Point2 get_scroll_base_offset() const;

	void set_scroll_base_scale(const Point2 &p_ofs);
	Point2 get_scroll_base_scale() const;

	void set_limit_begin(const Point2 &p_ofs);
	Point2 get_limit_begin() const;

	void set_limit_end(const Point2 &p_ofs);
	Point2 get_limit_end() const;

	void set_ignore_camera_zoom(bool ignore);
	bool is_ignore_camera_zoom();

	Vector2 get_final_offset() const;

	ParallaxBackground();
};

#endif // PARALLAX_BACKGROUND_H