font.hpp

// Copyright Take Vos 2019-2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "glyph_metrics.hpp"
#include "font_glyph_ids.hpp"
#include "gstring.hpp"
#include "font_description.hpp"
#include "../graphic_path.hpp"
#include "../resource_view.hpp"
#include "../exception.hpp"
#include "../required.hpp"
#include "../URL.hpp"
#include <span>
#include <vector>
#include <map>
 
namespace tt {
 
class font {
public:
    font() = default;
    virtual ~font() = default;
    font(font const &) = delete;
    font &operator=(font const &) = delete;
    font(font &&) = delete;
    font &operator=(font &&) = delete;
 
    font_description description;
 
    [[nodiscard]] virtual tt::glyph_id find_glyph(char32_t c) const noexcept = 0;
 
    [[nodiscard]] font_glyph_ids find_glyph(grapheme g) const noexcept;
 
    virtual std::optional<tt::glyph_id> loadGlyph(tt::glyph_id glyph_id, graphic_path &path) const noexcept = 0;
 
    virtual bool loadglyph_metrics(
        tt::glyph_id glyph_id,
        glyph_metrics &metrics,
        tt::glyph_id lookahead_glyph_id = tt::glyph_id{})
        const noexcept = 0;
};
 
}