ft-typeface.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_TYPE_FT_TYPEFACE_HPP
#define ANTKEEPER_TYPE_FT_TYPEFACE_HPP
 
#include <engine/type/typeface.hpp>
#include <ft2build.h>
#include FT_FREETYPE_H
#include <vector>
#include <memory>
 
namespace type {
 
class ft_typeface: public typeface
{
public:
    ft_typeface(FT_Library library, FT_Face face, std::unique_ptr<std::vector<FT_Byte>> file_buffer);
    
    virtual ~ft_typeface();
    
    virtual bool has_kerning() const;
    virtual bool get_metrics(float height, font_metrics& metrics) const;
    virtual bool get_metrics(float height, char32_t code, glyph_metrics& metrics) const;
    virtual bool get_bitmap(float height, char32_t code, std::vector<std::byte>& bitmap, std::uint32_t& bitmap_width, std::uint32_t& bitmap_height) const;
    virtual bool get_kerning(float height, char32_t first, char32_t second, math::fvec2& offset) const;
    
private:
    void set_face_pixel_size(float height) const;
    
    FT_Library library;
    FT_Face face;
    std::unique_ptr<std::vector<FT_Byte>> file_buffer;
    mutable float height;
};
 
} // namespace type
 
#endif // ANTKEEPER_TYPE_FT_TYPEFACE_HPP