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#pragma once
#include <array>
#include <cstddef>
#include <filesystem>
#include <glArrays.h>
#include <glad/gl.h>
#include <glm/glm.hpp>
#include <map>
#include <unicode.h>
#include <vector>
class Font {
public:
Font(std::filesystem::path path, unsigned int height);
using Quad = std::array<glm::vec4, 4>;
using Quads = std::vector<Quad>;
using TextureQuads = std::map<GLuint /*textureId*/, Quads>;
TextureQuads render(const utf8_string_view text) const;
struct CharData {
size_t textureIdx;
glm::uvec2 size;
glm::uvec2 position;
glm::ivec2 bearing;
long advance;
};
struct FontTexture {
glTexture texture;
unsigned int used;
};
static glm::uvec3 getTextureSize(unsigned int height);
protected:
void generateChars(const utf8_string_view text) const;
const CharData getChar(char) const;
std::size_t getTextureWithSpace(unsigned int adv) const;
std::filesystem::path path;
glm::uvec3 size;
mutable std::map<decltype(get_codepoint(nullptr)), CharData> charsData;
mutable std::vector<FontTexture> fontTextures;
};
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