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freetype.hpp
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freetype.hpp
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// Copyright 2007-2024 Jan Niklas Hasse <jhasse@bixense.com>
// For conditions of distribution and use, see copyright notice in LICENSE.txt
#pragma once
#include "jngl/Pixels.hpp"
#include "jngl/Rgba.hpp"
#include "texture.hpp"
#include <ft2build.h> // NOLINT
#include FT_FREETYPE_H
#include FT_STROKER_H
#include <map>
namespace jngl {
constexpr double LINE_HEIGHT_FACOTR = 1. / .63;
extern Rgba gFontColor;
class Character {
public:
Character(char32_t ch, unsigned int fontHeight, FT_Face, FT_Stroker);
Character(const Character&) = delete;
Character& operator=(const Character&) = delete;
Character(Character&&) = delete;
Character& operator=(Character&&) = delete;
~Character();
void draw(Mat3& modelview) const;
Pixels getWidth() const;
private:
Texture* texture_ = nullptr;
Pixels width_{0};
Pixels left_{0};
Pixels top_{0};
};
class FontImpl {
public:
FontImpl(const std::string& relativeFilename, unsigned int height, float strokePercentage);
FontImpl(const FontImpl&) = delete;
FontImpl& operator=(const FontImpl&) = delete;
FontImpl(FontImpl&&) = delete;
FontImpl& operator=(FontImpl&&) = delete;
~FontImpl();
void print(Mat3 modelview, const std::string& text);
void print(ScaleablePixels x, ScaleablePixels y, const std::string& text);
Pixels getTextWidth(const std::string& text);
Pixels getLineHeight() const;
void setLineHeight(Pixels);
private:
Character& GetCharacter(std::string::iterator& it, std::string::iterator end);
static int instanceCounter;
static FT_Library library;
FT_Face face = nullptr;
FT_Stroker stroker = nullptr;
std::unique_ptr<Finally> freeFace; // Frees face_ if necessary
unsigned int height_;
int lineHeight;
std::map<char32_t, std::shared_ptr<Character>> characters_;
std::shared_ptr<std::vector<FT_Byte>> bytes;
static std::map<std::string, std::weak_ptr<std::vector<FT_Byte>>> fileCaches;
};
} // namespace jngl