include/grub/font.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2003  Free Software Foundation, Inc.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #ifndef GRUB_FONT_HEADER
  21 #define GRUB_FONT_HEADER        1
  22
  23 #include <grub/types.h>
  24
  25 #define GRUB_FONT_MAGIC "PPF\x7f"
  26
  27 struct grub_font_glyph
  28 {
  29   /* Glyph width in pixels.  */
  30   grub_uint8_t width;
  31
  32   /* Glyph height in pixels.  */
  33   grub_uint8_t height;
  34
  35   /* Glyph width in characters.  */
  36   grub_uint8_t char_width;
  37
  38   /* Glyph baseline position in pixels (from up).  */
  39   grub_uint8_t baseline;
  40
  41   /* Glyph bitmap data array of bytes in ((width + 7) / 8) * height.
  42      Bitmap is formulated by height scanlines, each scanline having
  43      width number of pixels. Pixels are coded as bits, value 1 meaning
  44      of opaque pixel and 0 is transparent. If width does not fit byte
  45      boundary, it will be padded with 0 to make it fit.  */
  46   grub_uint8_t bitmap[32];
  47 };
  48
  49 typedef struct grub_font_glyph *grub_font_glyph_t;
  50
  51 int grub_font_get_glyph (grub_uint32_t code,
  52                          grub_font_glyph_t glyph);
  53
  54 #endif /* ! GRUB_FONT_HEADER */