/*************************************************************************/
/*  font_fb.h                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 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:                                             */
/*                                                                       */
/* 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  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#ifndef FONT_FALLBACK_H
#define FONT_FALLBACK_H

#include "servers/text_server.h"

struct FontDataFallback {
	Map<String, bool> lang_support_overrides;
	Map<String, bool> script_support_overrides;
	bool valid = false;
	int spacing_space = 0;
	int spacing_glyph = 0;

	virtual void clear_cache() = 0;

	virtual Error load_from_file(const String &p_filename, int p_base_size) = 0;
	virtual Error load_from_memory(const uint8_t *p_data, size_t p_size, int p_base_size) = 0;

	virtual float get_height(int p_size) const = 0;
	virtual float get_ascent(int p_size) const = 0;
	virtual float get_descent(int p_size) const = 0;

	virtual float get_underline_position(int p_size) const = 0;
	virtual float get_underline_thickness(int p_size) const = 0;

	virtual int get_spacing_space() const { return spacing_space; };
	virtual void set_spacing_space(int p_value) {
		spacing_space = p_value;
		clear_cache();
	};

	virtual int get_spacing_glyph() const { return spacing_glyph; };
	virtual void set_spacing_glyph(int p_value) {
		spacing_glyph = p_value;
		clear_cache();
	};

	virtual void set_antialiased(bool p_antialiased) = 0;
	virtual bool get_antialiased() const = 0;

	virtual void set_hinting(TextServer::Hinting p_hinting) = 0;
	virtual TextServer::Hinting get_hinting() const = 0;

	virtual void set_distance_field_hint(bool p_distance_field) = 0;
	virtual bool get_distance_field_hint() const = 0;

	virtual void set_force_autohinter(bool p_enabeld) = 0;
	virtual bool get_force_autohinter() const = 0;

	virtual bool has_outline() const = 0;
	virtual float get_base_size() const = 0;

	virtual bool has_char(char32_t p_char) const = 0;
	virtual String get_supported_chars() const = 0;

	virtual Vector2 get_advance(char32_t p_char, int p_size) const = 0;
	virtual Vector2 get_kerning(char32_t p_char, char32_t p_next, int p_size) const = 0;

	virtual Vector2 draw_glyph(RID p_canvas, int p_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const = 0;
	virtual Vector2 draw_glyph_outline(RID p_canvas, int p_size, int p_outline_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const = 0;

	virtual ~FontDataFallback(){};
};

#endif // FONT_FALLBACK_H