// vi:ft=cpp
/*
 * (c) 2010 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *          Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 */
#pragma once

#include <l4/sys/types.h>

#include <l4/mag-gfx/geometry>

namespace Mag_gfx {

struct Font
{
  unsigned char const *img;
  l4_int32_t const *wtab, *otab;
  int w, h;

  explicit Font(void const *_ttf)
  {
    char const *ttf = (char const *)_ttf;

    otab = (l4_int32_t const *)ttf;
    wtab = (l4_int32_t const *)(ttf + 1024);
    w = *(l4_int32_t const *)(ttf + 2048);
    h = *(l4_int32_t const *)(ttf + 2052);
    img = (unsigned char const *)(ttf + 2056);
  }

  /**
   * Calculate width of string when printed with the font
   */
  int str_w(char const *_str) const
  {
    unsigned char const *str = (unsigned char const *)_str;
    int res = 0;
    for (; str && *str; ++str)
      res += wtab[*str];

    return res;
  }

  int str_w(char const *_str, int len) const
  {
    unsigned char const *str = (unsigned char const *)_str;
    int res = 0;
    for (; str && *str && len; ++str, --len)
      res += wtab[*str];

    return res;
  }

  /**
   * Calculate height of string when printed with the font
   */
  int str_h(char const *) const { return h; }
  int str_h(char const *, int) const { return h; }

  Area str_sz(char const *s) const
  { return Area(str_w(s), str_h(s)); }

  Area str_sz(char const *s, int l) const
  { return Area(str_w(s, l), str_h(s, l)); }


};

}