source/texk/web2c/luatexdir/font/sfnt.h

   1 /* sfnt.h
   2
   3    Copyright 2002 by Jin-Hwan Cho and Shunsaku Hirata,
   4    the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
   5    Copyright 2006-2008 Taco Hoekwater <taco@luatex.org>
   6
   7    This file is part of LuaTeX.
   8
   9    LuaTeX is free software; you can redistribute it and/or modify it under
  10    the terms of the GNU General Public License as published by the Free
  11    Software Foundation; either version 2 of the License, or (at your
  12    option) any later version.
  13
  14    LuaTeX is distributed in the hope that it will be useful, but WITHOUT
  15    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  17    License for more details.
  18
  19    You should have received a copy of the GNU General Public License along
  20    with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
  21
  22
  23 #ifndef _SFNT_H_
  24 #  define _SFNT_H_
  25
  26 #  if  HAVE_CONFIG_H
  27 #    include <w2c/config.h>
  28 #  endif                        /* HAVE_CONFIG_H_ */
  29
  30 /* Data Types as described in Apple's TTRefMan */
  31 typedef unsigned char BYTE;
  32 typedef signed char ICHAR;
  33 typedef unsigned short USHORT;
  34 typedef signed short SHORT;
  35 typedef unsigned long ULONG;
  36 typedef signed long LONG;
  37 typedef unsigned long Fixed;    /* 16.16-bit signed fixed-point number */
  38 typedef short FWord;
  39 typedef unsigned short uFWord;
  40 typedef short F2Dot14;          /* 16-bit signed fixed number with the low 14 bits representing fraction. */
  41
  42 struct sfnt_table {
  43     /* table header */
  44     char tag[4];
  45     ULONG check_sum;
  46     ULONG offset;
  47     ULONG length;
  48     char *data;                 /* table data */
  49 };
  50
  51 #  define SFNT_TABLE_REQUIRED (1 << 0)
  52
  53 struct sfnt_table_directory {
  54     ULONG version;              /* Fixed for Win */
  55     USHORT num_tables;
  56     USHORT search_range;
  57     USHORT entry_selector;
  58     USHORT range_shift;
  59     USHORT num_kept_tables;     /* number of kept tables */
  60     char *flags;                /* keep or omit */
  61     struct sfnt_table *tables;
  62 };
  63
  64 /* sfnt resource */
  65 #  define SFNT_TYPE_TRUETYPE   (1 << 0)
  66 #  define SFNT_TYPE_OPENTYPE   (1 << 1)
  67 #  define SFNT_TYPE_POSTSCRIPT (1 << 2)
  68 #  define SFNT_TYPE_TTC        (1 << 4)
  69
  70 typedef struct {
  71     int type;
  72     struct sfnt_table_directory *directory;
  73 #  ifdef XETEX
  74     FT_Face ft_face;
  75     long loc;
  76 #  elif defined(pdfTeX)
  77     BYTE *buffer;
  78     long buflen;
  79     long loc;
  80 #  else
  81     FILE *stream;
  82 #  endif
  83 } sfnt;
  84
  85 /* Convert sfnt "fixed" type to double */
  86 #  define fixed(a) ((double)((a)%0x10000L)/(double)(0x10000L) + \
  87  (a)/0x10000L - (((a)/0x10000L > 0x7fffL) ? 0x10000L : 0))
  88
  89 #  ifdef XETEX
  90 UNSIGNED_BYTE ft_unsigned_byte(sfnt * f);
  91 SIGNED_BYTE ft_signed_byte(sfnt * f);
  92 UNSIGNED_PAIR ft_unsigned_pair(sfnt * f);
  93 SIGNED_PAIR ft_signed_pair(sfnt * f);
  94 UNSIGNED_QUAD ft_unsigned_quad(sfnt * f);
  95 unsigned long ft_read(unsigned char *buf, unsigned long len, sfnt * f);
  96
  97 #    define sfnt_get_byte(s)   ((BYTE)   ft_unsigned_byte(s))
  98 #    define sfnt_get_char(s)   ((ICHAR)   ft_signed_byte  (s))
  99 #    define sfnt_get_ushort(s) ((USHORT) ft_unsigned_pair(s))
 100 #    define sfnt_get_short(s)  ((SHORT)  ft_signed_pair  (s))
 101 #    define sfnt_get_ulong(s)  ((ULONG)  ft_unsigned_quad(s))
 102 #    define sfnt_get_long(s)   ((LONG)   ft_signed_quad  (s))
 103
 104 #    define sfnt_seek_set(s,o) (s)->loc = (o)
 105 #    define sfnt_read(b,l,s)   ft_read((b), (l), (s))
 106 #  elif defined(pdfTeX)
 107 BYTE get_unsigned_byte(sfnt * f);
 108 ICHAR get_signed_byte(sfnt * f);
 109 USHORT get_unsigned_pair(sfnt * f);
 110 SHORT get_signed_pair(sfnt * f);
 111 ULONG get_unsigned_quad(sfnt * f);
 112 int do_sfnt_read(unsigned char *dest, int len, sfnt * f);
 113
 114 #    define sfnt_get_byte(s)   ((BYTE)   get_unsigned_byte(s))
 115 #    define sfnt_get_char(s)   ((ICHAR)   get_signed_byte  (s))
 116 #    define sfnt_get_ushort(s) ((USHORT) get_unsigned_pair(s))
 117 #    define sfnt_get_short(s)  ((SHORT)  get_signed_pair  (s))
 118 #    define sfnt_get_ulong(s)  ((ULONG)  get_unsigned_quad(s))
 119 #    define sfnt_get_long(s)   ((LONG)   get_signed_quad  (s))
 120
 121 #    define sfnt_seek_set(s,o) (s)->loc = (o)
 122 #    define sfnt_read(b,l,s)   do_sfnt_read((b), (l), (s))
 123 #  else
 124 /* get_***_*** from numbers.h */
 125 #    define sfnt_get_byte(s)   ((BYTE)   get_unsigned_byte((s)->stream))
 126 #    define sfnt_get_char(s)   ((ICHAR)  get_signed_byte  ((s)->stream))
 127 #    define sfnt_get_ushort(s) ((USHORT) get_unsigned_pair((s)->stream))
 128 #    define sfnt_get_short(s)  ((SHORT)  get_signed_pair  ((s)->stream))
 129 #    define sfnt_get_ulong(s)  ((ULONG)  get_unsigned_quad((s)->stream))
 130 #    define sfnt_get_long(s)   ((LONG)   get_signed_quad  ((s)->stream))
 131
 132 #    define sfnt_seek_set(s,o)   seek_absolute((s)->stream, (o))
 133 #    define sfnt_read(b,l,s)     fread((b), 1, (l), (s)->stream)
 134 #  endif
 135
 136 extern int put_big_endian(void *s, LONG q, int n);
 137
 138 #  define sfnt_put_ushort(s,v) put_big_endian((s), v, 2);
 139 #  define sfnt_put_short(s,v)  put_big_endian((s), v, 2);
 140 #  define sfnt_put_ulong(s,v)  put_big_endian((s), v, 4);
 141 #  define sfnt_put_long(s,v)   put_big_endian((s), v, 4);
 142
 143 #  ifdef XETEX
 144 extern sfnt *sfnt_open(FT_Face face, int accept_types);
 145 #  elif defined(pdfTeX)
 146 extern sfnt *sfnt_open(unsigned char *buffer, int buflen);
 147 #  else
 148 extern sfnt *sfnt_open(FILE * fp);
 149 #  endif
 150 extern void sfnt_close(sfnt * sfont);
 151
 152 /* table directory */
 153 extern int sfnt_read_table_directory(sfnt * sfont, ULONG offset);
 154 extern ULONG sfnt_find_table_len(sfnt * sfont, const char *tag);
 155 extern ULONG sfnt_find_table_pos(sfnt * sfont, const char *tag);
 156 extern ULONG sfnt_locate_table(sfnt * sfont, const char *tag);
 157
 158 extern void sfnt_set_table(sfnt * sfont,
 159                            const char *tag, void *data, ULONG length);
 160 extern int sfnt_require_table(sfnt * sfont, const char *tag, int must_exist);
 161
 162 #  ifdef pdfTeX
 163 typedef struct {
 164     ULONG length;
 165     BYTE *data;
 166 } pdf_obj;
 167
 168 #    define ASSERT(a) assert(a)
 169 #    define RELEASE(a) free(a)
 170 #    define NEW(a,b) xmalloc((unsigned)((unsigned)(a)*sizeof(b)))
 171 #    define RENEW(a,b,c) xrealloc(a, (unsigned)((unsigned)(b)*sizeof(c)))
 172
 173 #  endif
 174
 175 extern pdf_obj *sfnt_create_FontFile_stream(sfnt * sfont);
 176
 177 #endif                          /* _SFNT_H_ */