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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_TRUETYPE_TAGS_H
#include FT_TRUETYPE_TABLES_H
#include FT_SYNTHESIS_H
#undef __FTERRORS_H__
#define FT_ERROR_START_LIST const char *ft_errmsgs[] = {
#define FT_ERRORDEF(e, v, s) [e] = s,
#define FT_ERROR_END_LIST };
#include FT_ERRORS_H
#define GRUB_FONT_DEFAULT_SIZE 16
#define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))
#define MAX_CODE 65536
static unsigned char result[MAX_CODE / 8];
static void
add_glyph (FT_Face face,
unsigned int char_code)
{
int flag = FT_LOAD_RENDER | FT_LOAD_MONOCHROME;
FT_Error err;
FT_UInt glyph_idx;
glyph_idx = FT_Get_Char_Index (face, char_code);
if (!glyph_idx)
return;
err = FT_Load_Glyph (face, glyph_idx, flag);
if (err)
{
printf ("Freetype Error %d loading glyph 0x%x for U+0x%x",
err, glyph_idx, char_code);
if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs))
printf (": %s\n", ft_errmsgs[err]);
else
printf ("\n");
return;
}
if (face->glyph->bitmap.width > 12 && char_code < MAX_CODE)
result[char_code >> 3] |= (1 << (char_code & 7));
}
int
main (int argc, char *argv[])
{
FT_Library ft_lib;
FILE *file;
int i;
if (argc != 3)
{
fprintf (stderr, "grub-gen-widthspec: usage: INPUT OUTPUT");
return 1;
}
if (FT_Init_FreeType (&ft_lib))
{
fprintf (stderr, "grub-gen-widthspec: error: FT_Init_FreeType fails");
return 1;
}
{
FT_Face ft_face;
int size;
FT_Error err;
unsigned int char_code, glyph_index;
err = FT_New_Face (ft_lib, argv[1], 0, &ft_face);
if (err)
{
fprintf (stderr, "can't open file %s, index %d: error %d",
argv[1], 0, err);
if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs))
fprintf (stderr, ": %s\n", ft_errmsgs[err]);
else
fprintf (stderr, "\n");
return 1;
}
if ((ft_face->face_flags & FT_FACE_FLAG_SCALABLE) ||
(! ft_face->num_fixed_sizes))
size = GRUB_FONT_DEFAULT_SIZE;
else
size = ft_face->available_sizes[0].height;
if (FT_Set_Pixel_Sizes (ft_face, size, size))
{
fprintf (stderr, "grub-gen-widthspec: error: can't set %dx%d font size", size, size);
return 1;
}
for (char_code = FT_Get_First_Char (ft_face, &glyph_index);
glyph_index;
char_code = FT_Get_Next_Char (ft_face, char_code, &glyph_index))
add_glyph (ft_face, char_code);
FT_Done_Face (ft_face);
}
FT_Done_FreeType (ft_lib);
file = fopen (argv[2], "w");
if (! file)
{
fprintf (stderr, "grub-gen-asciih: error: cannot write to `%s': %s", argv[2],
strerror (errno));
return 1;
}
fprintf (file, "/* THIS CHUNK OF BYTES IS AUTOMATICALLY GENERATED */\n");
fprintf (file, "unsigned char widthspec[] =\n");
fprintf (file, "{\n");
for (i = 0; i < MAX_CODE / 8; i++)
fprintf (file, "0x%02x,%c", result[i], ((i & 0xf) == 0xf) ? '\n' : ' ');
fprintf (file, "};\n");
fclose (file);
return 0;
}
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