include/library/customfont.hpp

   1 #ifndef _customfont__hpp__included__
   2 #define _customfont__hpp__included__
   3
   4 #include <vector>
   5 #include <cstdint>
   6 #include <cstdlib>
   7 #include <iostream>
   8 #include <stdexcept>
   9 #include <map>
  10 #include "framebuffer.hpp"
  11
  12 struct font_glyph_data
  13 {
  14         font_glyph_data();
  15         font_glyph_data(std::istream& s);
  16         unsigned width;
  17         unsigned height;
  18         unsigned stride;
  19         std::vector<uint32_t> glyph;    //Bitpacked, element breaks between rows.
  20         void render(framebuffer<false>& fb, int32_t x, int32_t y, premultiplied_color fg, premultiplied_color bg)
  21                 const;
  22         void render(framebuffer<true>& fb, int32_t x, int32_t y, premultiplied_color fg, premultiplied_color bg) const;
  23 };
  24
  25 struct custom_font
  26 {
  27 public:
  28         custom_font();
  29         custom_font(const std::string& file);
  30         void add(const std::u32string& key, const font_glyph_data& glyph) throw(std::bad_alloc);
  31         std::u32string best_ligature_match(const std::u32string& codepoints, size_t start) const
  32                 throw(std::bad_alloc);
  33         const font_glyph_data& lookup_glyph(const std::u32string& key) const throw();
  34         unsigned get_rowadvance() const throw() { return rowadvance; }
  35 private:
  36         std::map<std::u32string, font_glyph_data> glyphs;
  37         unsigned rowadvance;
  38 };
  39
  40 #endif