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// -*- related-file-name: "../include/efont/otfpost.hh" -*-
/* otfpost.{cc,hh} -- OpenType post table
*
* Copyright (c) 2006-2011 Eddie Kohler
*
* This program 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 2 of the License, or (at your option)
* any later version. This program 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <efont/otfpost.hh>
#include <lcdf/error.hh>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <efont/otfdata.hh> // for ntohl()
#define USHORT_AT(d) (ntohs(*(const uint16_t *)(d)))
#define SHORT_AT(d) ((int16_t) ntohs(*(const uint16_t *)(d)))
#define ULONG_AT(d) (ntohl(*(const uint32_t *)(d)))
#define LONG_AT(d) ((int32_t) ntohl(*(const uint32_t *)(d)))
namespace Efont { namespace OpenType {
static const char * const mac_names[] = {
".notdef", ".null", "nonmarkingreturn", "space", // 0-3
"exclam", "quotedbl", "numbersign", "dollar", // 4-7
"percent", "ampersand", "quotesingle", "parenleft", // 8-11
"parenright", "asterisk", "plus", "comma", // 12-15
"hyphen", "period", "slash", "zero", // 16-19
"one", "two", "three", "four", // 20-23
"five", "six", "seven", "eight", // 24-27
"nine", "colon", "semicolon", "less", // 28-31
"equal", "greater", "question", "at", // 32-35
"A", "B", "C", "D", // 36-39
"E", "F", "G", "H", // 40-43
"I", "J", "K", "L", // 44-47
"M", "N", "O", "P", // 48-51
"Q", "R", "S", "T", // 52-55
"U", "V", "W", "X", // 56-59
"Y", "Z", "bracketleft", "backslash", // 60-63
"bracketright", "asciicircum", "underscore", "grave", // 64-67
"a", "b", "c", "d", // 68-71
"e", "f", "g", "h", // 72-75
"i", "j", "k", "l", // 76-79
"m", "n", "o", "p", // 80-83
"q", "r", "s", "t", // 84-87
"u", "v", "w", "x", // 88-91
"y", "z", "braceleft", "bar", // 92-95
"braceright", "asciitilde", "Adieresis", "Aring", // 96-99
"Ccedilla", "Eacute", "Ntilde", "Odieresis", // 100-103
"Udieresis", "aacute", "agrave", "acircumflex", // 104-107
"adieresis", "atilde", "aring", "ccedilla", // 108-111
"eacute", "egrave", "ecircumflex", "edieresis", // 112-115
"iacute", "igrave", "icircumflex", "idieresis", // 116-119
"ntilde", "oacute", "ograve", "ocircumflex", // 120-123
"odieresis", "otilde", "uacute", "ugrave", // 124-127
"ucircumflex", "udieresis", "dagger", "degree", // 128-131
"cent", "sterling", "section", "bullet", // 132-135
"paragraph", "germandbls", "registered", "copyright", // 136-139
"trademark", "acute", "dieresis", "notequal", // 140-143
"AE", "Oslash", "infinity", "plusminus", // 144-147
"lessequal", "greaterequal", "yen", "mu", // 148-151
"partialdiff", "summation", "product", "pi", // 152-155
"integral", "ordfeminine", "ordmasculine", "Omega", // 156-159
"ae", "oslash", "questiondown", "exclamdown", // 160-163
"logicalnot", "radical", "florin", "approxequal", // 164-167
"Delta", "guillemotleft", "guillemotright", "ellipsis", // 168-171
"nonbreakingspace", "Agrave", "Atilde", "Otilde", // 172-175
"OE", "oe", "endash", "emdash", // 176-179
"quotedblleft", "quotedblright", "quoteleft", "quoteright", // 180-183
"divide", "lozenge", "ydieresis", "Ydieresis", // 184-187
"fraction", "currency", "guilsinglleft", "guilsinglright", // 188-191
"fi", "fl", "daggerdbl", "periodcentered", // 192-195
"quotesinglbase", "quotedblbase", "perthousand", "Acircumflex", // 196-199
"Ecircumflex", "Aacute", "Edieresis", "Egrave", // 200-203
"Iacute", "Icircumflex", "Idieresis", "Igrave", // 204-207
"Oacute", "Ocircumflex", "apple", "Ograve", // 208-211
"Uacute", "Ucircumflex", "Ugrave", "dotlessi", // 212-215
"circumflex", "tilde", "macron", "breve", // 216-219
"dotaccent", "ring", "cedilla", "hungarumlaut", // 220-223
"ogonek", "caron", "Lslash", "lslash", // 224-227
"Scaron", "scaron", "Zcaron", "zcaron", // 228-231
"brokenbar", "Eth", "eth", "Yacute", // 232-235
"yacute", "Thorn", "thorn", "minus", // 236-239
"multiply", "onesuperior", "twosuperior", "threesuperior", // 240-243
"onehalf", "onequarter", "threequarters", "franc", // 244-247
"Gbreve", "gbreve", "Idotaccent", "Scedilla", // 248-251
"scedilla", "Cacute", "cacute", "Ccaron", // 252-255
"ccaron", "dcroat" // 256-257
};
Post::Post(const String &s, ErrorHandler *errh)
: _str(s), _version(0)
{
_str.align_long();
_error = parse_header(errh ? errh : ErrorHandler::silent_handler());
}
int
Post::parse_header(ErrorHandler *errh)
{
// HEADER FORMAT:
// 0 FIXED version
// 4 FIXED italicAngle
// 8 FWORD underlinePosition
// 10 FWORD underlineThickness
// 12 ULONG isFixedPitch
// 16 ULONG minMemType42
// 20 ULONG maxMemType42
// 24 ULONG minMemType1
// 28 ULONG maxMemType1
int len = _str.length();
const uint8_t *data = _str.udata();
if (HEADER_SIZE > len)
return errh->error("OTF post too small for header"), -EFAULT;
_version = USHORT_AT(data); // ignore minor version number
// except that version 2.5 isn't compatible
if (_version < 1 || _version > 3
|| (_version == 2 && USHORT_AT(data + 2) == 0x5000))
return errh->error("bad post version number"), -ERANGE;
if (_version == 2) {
// VERSION 2.0 GLYPH NAMES FORMAT:
// 32 USHORT numberOfGlyphs
// 34 USHORT glyphNameIndex[mumberOfGlyphs]
// CHAR names[...]
if (HEADER_SIZE + 2 > len
|| ((_nglyphs = USHORT_AT(data + HEADER_SIZE)),
HEADER_SIZE + 2 + 2 * _nglyphs > len))
return errh->error("OTF post too small for glyph map"), -EFAULT;
const uint8_t *gni = data + HEADER_SIZE + 2;
const uint8_t *names = gni + 2 * _nglyphs;
int next_name = N_MAC_GLYPHS, g;
bool gni_error_reported = false;
for (int i = 0; i < _nglyphs; i++, gni += 2)
// Some fonts have more than 32768 glyphs. Although the 'post'
// spec says name indexes 32768-65535 are reserved, some large
// fonts treat those indexes as valid.
if ((g = USHORT_AT(gni)) >= 32768 && g >= _nglyphs) {
if (!gni_error_reported)
errh->error("bad glyph name index in post");
gni_error_reported = true;
} else
while (g >= next_name) {
if (names - data > len
|| (names + 1 + names[0]) - data > len)
return errh->error("OTF post too small for glyph names"), -EFAULT;
_extend_glyph_names.push_back(names - data);
names += 1 + names[0];
next_name++;
}
} else if (_version == 1)
_nglyphs = N_MAC_GLYPHS;
else
_nglyphs = -1;
return 0;
}
double
Post::italic_angle() const
{
if (error() < 0)
return -1;
return (double) LONG_AT(_str.udata() + 4) / 65536.;
}
bool
Post::is_fixed_pitch() const
{
if (error() < 0)
return false;
return ULONG_AT(_str.udata() + 12) != 0;
}
bool
Post::glyph_names(Vector<PermString> &gnames) const
{
gnames.clear();
if (error() < 0)
return false;
if (_version == 1) {
for (int i = 0; i < N_MAC_GLYPHS; i++)
gnames.push_back(mac_names[i]);
return true;
} else if (_version == 2) {
const uint8_t *data = _str.udata();
const uint8_t *gni = data + HEADER_SIZE + 2;
for (int i = 0; i < _nglyphs; i++, gni += 2) {
int g = USHORT_AT(gni);
if (g < N_MAC_GLYPHS)
gnames.push_back(mac_names[g]);
else {
const uint8_t *n = data + _extend_glyph_names[g - N_MAC_GLYPHS];
gnames.push_back(PermString((const char *) n + 1, *n));
}
}
return true;
} else
return false;
}
}}
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