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dpx-cff.c
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dpx-cff.c
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/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2016 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "dpx-cff.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dpx-cff_dict.h"
#include "dpx-cff_stdstr.h"
#include "dpx-cff_types.h"
#include "dpx-error.h"
#include "dpx-mem.h"
#include "dpx-numbers.h"
#define CFF_DEBUG 5
#define CFF_DEBUG_STR "CFF"
static unsigned int
get_unsigned (rust_input_handle_t handle, int n)
{
unsigned int v = 0;
while (n-- > 0)
v = v*0x100u + tt_get_unsigned_byte(handle);
return v;
}
#define get_offset(s, n) get_unsigned((s), (n))
/*
* Read Header, Name INDEX, Top DICT INDEX, and String INDEX.
*/
cff_font *cff_open(rust_input_handle_t handle, int offset, int n)
{
cff_font *cff;
cff_index *idx;
cff = NEW(1, cff_font);
cff->fontname = NULL;
cff->index = n;
cff->handle = handle;
cff->offset = offset;
cff->filter = 0; /* not used */
cff->flag = 0;
cff->name = NULL;
cff->topdict = NULL;
cff->gsubr = NULL;
cff->encoding = NULL;
cff->charsets = NULL;
cff->fdselect = NULL;
cff->cstrings = NULL;
cff->fdarray = NULL;
cff->private = NULL;
cff->subrs = NULL;
cff->num_glyphs = 0;
cff->num_fds = 0;
cff->string = NULL;
cff->_string = NULL;
cff_seek_set(cff, 0);
cff->header.major = tt_get_unsigned_byte(cff->handle);
cff->header.minor = tt_get_unsigned_byte(cff->handle);
cff->header.hdr_size = tt_get_unsigned_byte(cff->handle);
cff->header.offsize = tt_get_unsigned_byte(cff->handle);
if (cff->header.offsize < 1 ||
cff->header.offsize > 4)
_tt_abort("invalid offsize data");
if (cff->header.major > 1 ||
cff->header.minor > 0) {
dpx_warning("%s: CFF version %u.%u not supported.",
CFF_DEBUG_STR, cff->header.major, cff->header.minor);
cff_close(cff);
return NULL;
}
cff_seek_set(cff, (cff->header).hdr_size);
/* Name INDEX */
idx = cff_get_index(cff);
if (n > idx->count - 1) {
dpx_warning("%s: Invalid CFF fontset index number.", CFF_DEBUG_STR);
cff_close(cff);
return NULL;
}
cff->name = idx;
cff->fontname = cff_get_name(cff);
/* Top DICT INDEX */
idx = cff_get_index(cff);
if (n > idx->count - 1)
_tt_abort("CFF Top DICT not exist...");
cff->topdict = cff_dict_unpack(idx->data + idx->offset[n] - 1,
idx->data + idx->offset[n + 1] - 1);
if (!cff->topdict)
_tt_abort("Parsing CFF Top DICT data failed...");
cff_release_index(idx);
if (cff_dict_known(cff->topdict, "CharstringType") &&
cff_dict_get(cff->topdict, "CharstringType", 0) != 2) {
dpx_warning("Only Type 2 Charstrings supported...");
cff_close(cff);
return NULL;
}
if (cff_dict_known(cff->topdict, "SyntheticBase")) {
dpx_warning("CFF Synthetic font not supported.");
cff_close(cff);
return NULL;
}
/* String INDEX */
cff->string = cff_get_index(cff);
/* offset to GSubr */
cff->gsubr_offset = cff_tell(cff) - offset;
/* Number of glyphs */
offset = cff_dict_get(cff->topdict, "CharStrings", 0);
cff_seek_set(cff, offset);
cff->num_glyphs = tt_get_unsigned_pair(cff->handle);
/* Check for font type */
if (cff_dict_known(cff->topdict, "ROS")) {
cff->flag |= FONTTYPE_CIDFONT;
} else {
cff->flag |= FONTTYPE_FONT;
}
/* Check for encoding */
if (cff_dict_known(cff->topdict, "Encoding")) {
offset = cff_dict_get(cff->topdict, "Encoding", 0);
if (offset == 0) { /* predefined */
cff->flag |= ENCODING_STANDARD;
} else if (offset == 1) {
cff->flag |= ENCODING_EXPERT;
}
} else {
cff->flag |= ENCODING_STANDARD;
}
/* Check for charset */
if (cff_dict_known(cff->topdict, "charset")) {
offset = cff_dict_get(cff->topdict, "charset", 0);
if (offset == 0) { /* predefined */
cff->flag |= CHARSETS_ISOADOBE;
} else if (offset == 1) {
cff->flag |= CHARSETS_EXPERT;
} else if (offset == 2) {
cff->flag |= CHARSETS_EXPSUB;
}
} else {
cff->flag |= CHARSETS_ISOADOBE;
}
cff_seek_set(cff, cff->gsubr_offset); /* seek back to GSubr */
return cff;
}
void
cff_close (cff_font *cff)
{
card16 i;
if (cff) {
free(cff->fontname);
if (cff->name) cff_release_index(cff->name);
if (cff->topdict) cff_release_dict(cff->topdict);
if (cff->string) cff_release_index(cff->string);
if (cff->gsubr) cff_release_index(cff->gsubr);
if (cff->encoding) cff_release_encoding(cff->encoding);
if (cff->charsets) cff_release_charsets(cff->charsets);
if (cff->fdselect) cff_release_fdselect(cff->fdselect);
if (cff->cstrings) cff_release_index(cff->cstrings);
if (cff->fdarray) {
for (i=0;i<cff->num_fds;i++) {
if (cff->fdarray[i]) cff_release_dict(cff->fdarray[i]);
}
free(cff->fdarray);
}
if (cff->private) {
for (i=0;i<cff->num_fds;i++) {
if (cff->private[i]) cff_release_dict(cff->private[i]);
}
free(cff->private);
}
if (cff->subrs) {
for (i=0;i<cff->num_fds;i++) {
if (cff->subrs[i]) cff_release_index(cff->subrs[i]);
}
free(cff->subrs);
}
if (cff->_string)
cff_release_index(cff->_string);
free(cff);
}
return;
}
char *
cff_get_name (cff_font *cff)
{
char *fontname;
l_offset len;
cff_index *idx;
idx = cff->name;
len = idx->offset[cff->index + 1] - idx->offset[cff->index];
fontname = NEW(len + 1, char);
memcpy(fontname, idx->data + idx->offset[cff->index] - 1, len);
fontname[len] = '\0';
return fontname;
}
int
cff_set_name (cff_font *cff, char *name)
{
cff_index *idx;
if (strlen(name) > 127)
_tt_abort("FontName string length too large...");
if (cff->name)
cff_release_index(cff->name);
cff->name = idx = NEW(1, cff_index);
idx->count = 1;
idx->offsize = 1;
idx->offset = NEW(2, l_offset);
(idx->offset)[0] = 1;
(idx->offset)[1] = strlen(name) + 1;
idx->data = NEW(strlen(name), card8);
memmove(idx->data, name, strlen(name)); /* no trailing '\0' */
return 5 + strlen(name);
}
int
cff_put_header (cff_font *cff, card8 *dest, int destlen)
{
if (destlen < 4)
_tt_abort("Not enough space available...");
*(dest++) = cff->header.major;
*(dest++) = cff->header.minor;
*(dest++) = 4; /* Additional data in between header and
* Name INDEX ignored.
*/
/* We will set all offset (0) to four-byte integer. */
*(dest++) = 4;
cff->header.offsize = 4;
return 4;
}
/* Only read header part but not body */
cff_index *
cff_get_index_header (cff_font *cff)
{
cff_index *idx;
card16 i, count;
idx = NEW(1, cff_index);
idx->count = count = tt_get_unsigned_pair(cff->handle);
if (count > 0) {
idx->offsize = tt_get_unsigned_byte(cff->handle);
if (idx->offsize < 1 || idx->offsize > 4)
_tt_abort("invalid offsize data");
idx->offset = NEW(count+1, l_offset);
for (i=0;i<count;i++) {
(idx->offset)[i] = get_offset(cff->handle, idx->offsize);
}
if (count == 0xFFFF)
cff_seek(cff, cff_tell(cff) + idx->offsize);
else
(idx->offset)[i] = get_offset(cff->handle, idx->offsize);
if (idx->offset[0] != 1)
_tt_abort("cff_get_index(): invalid index data");
idx->data = NULL;
} else {
idx->offsize = 0;
idx->offset = NULL;
idx->data = NULL;
}
return idx;
}
cff_index *
cff_get_index (cff_font *cff)
{
cff_index *idx;
card16 i, count;
int length, nb_read, offset;
idx = NEW(1, cff_index);
idx->count = count = tt_get_unsigned_pair(cff->handle);
if (count > 0) {
idx->offsize = tt_get_unsigned_byte(cff->handle);
if (idx->offsize < 1 || idx->offsize > 4)
_tt_abort("invalid offsize data");
idx->offset = NEW(count + 1, l_offset);
for (i = 0 ; i < count + 1; i++) {
idx->offset[i] = get_offset(cff->handle, idx->offsize);
}
if (idx->offset[0] != 1)
_tt_abort("Invalid CFF Index offset data");
length = idx->offset[count] - idx->offset[0];
idx->data = NEW(length, card8);
offset = 0;
while (length > 0) {
nb_read = cff_read_data(idx->data + offset, length, cff);
offset += nb_read;
length -= nb_read;
}
} else {
idx->offsize = 0;
idx->offset = NULL;
idx->data = NULL;
}
return idx;
}
int
cff_pack_index (cff_index *idx, card8 *dest, int destlen)
{
int len = 0;
size_t datalen;
card16 i;
if (idx->count < 1) {
if (destlen < 2)
_tt_abort("Not enough space available...");
memset(dest, 0, 2);
return 2;
}
len = cff_index_size(idx);
datalen = idx->offset[idx->count] - 1;
if (destlen < len)
_tt_abort("Not enough space available...");
*(dest++) = (idx->count >> 8) & 0xff;
*(dest++) = idx->count & 0xff;
if (datalen < 0xffUL) {
idx->offsize = 1;
*(dest++) = 1;
for (i = 0; i <= idx->count; i++) {
*(dest++) = (card8) (idx->offset[i] & 0xff);
}
} else if (datalen < 0xffffUL) {
idx->offsize = 2;
*(dest++) = 2;
for (i = 0; i <= idx->count; i++) {
*(dest++) = (card8) ((idx->offset[i] >> 8) & 0xff);
*(dest++) = (card8) ( idx->offset[i] & 0xff);
}
} else if (datalen < 0xffffffUL) {
idx->offsize = 3;
*(dest++) = 3;
for (i = 0; i <= idx->count; i++) {
*(dest++) = (card8)((idx->offset[i] >> 16) & 0xff);
*(dest++) = (card8)((idx->offset[i] >> 8) & 0xff);
*(dest++) = (card8)(idx->offset[i] & 0xff);
}
} else {
idx->offsize = 4;
*(dest++) = 4;
for (i = 0; i <= idx->count; i++) {
*(dest++) = (card8)((idx->offset[i] >> 24) & 0xff);
*(dest++) = (card8)((idx->offset[i] >> 16) & 0xff);
*(dest++) = (card8)((idx->offset[i] >> 8) & 0xff);
*(dest++) = (card8)(idx->offset[i] & 0xff);
}
}
memmove(dest, idx->data, idx->offset[idx->count] - 1);
return len;
}
int
cff_index_size (cff_index *idx)
{
if (idx->count > 0) {
l_offset datalen;
datalen = idx->offset[idx->count] - 1;
if (datalen < 0xffUL) {
idx->offsize = 1;
} else if (datalen < 0xffffUL) {
idx->offsize = 2;
} else if (datalen < 0xffffffUL) {
idx->offsize = 3;
} else {
idx->offsize = 4;
}
return (3 + (idx->offsize)*(idx->count + 1) + datalen);
} else {
return 2;
}
}
cff_index *cff_new_index (card16 count)
{
cff_index *idx;
idx = NEW(1, cff_index);
idx->count = count;
idx->offsize = 0;
if (count > 0) {
idx->offset = NEW(count + 1, l_offset);
(idx->offset)[0] = 1;
} else {
idx->offset = NULL;
}
idx->data = NULL;
return idx;
}
void cff_release_index (cff_index *idx)
{
if (idx) {
if (idx->data) {
free(idx->data);
}
if (idx->offset) {
free(idx->offset);
}
free(idx);
}
}
/* Strings */
char *cff_get_string (cff_font *cff, s_SID id)
{
char *result = NULL;
int len;
if (id < CFF_STDSTR_MAX) {
len = strlen(cff_stdstr[id]);
result = NEW(len+1, char);
memcpy(result, cff_stdstr[id], len);
result[len] = '\0';
} else if (cff && cff->string) {
cff_index *strings = cff->string;
id -= CFF_STDSTR_MAX;
if (id < strings->count) {
len = (strings->offset)[id+1] - (strings->offset)[id];
result = NEW(len + 1, char);
memmove(result, strings->data + (strings->offset)[id] - 1, len);
result[len] = '\0';
}
}
return result;
}
int cff_get_sid (cff_font *cff, const char *str)
{
card16 i;
if (!cff || !str)
return -1;
/* I search String INDEX first. */
if (cff && cff->string) {
cff_index *idx = cff->string;
for (i = 0; i < idx->count; i++) {
if (strlen(str) == (idx->offset)[i+1] - (idx->offset)[i] &&
!memcmp(str, (idx->data)+(idx->offset)[i]-1, strlen(str)))
return (i + CFF_STDSTR_MAX);
}
}
for (i = 0; i < CFF_STDSTR_MAX; i++) {
if (streq_ptr(str, cff_stdstr[i]))
return i;
}
return -1;
}
int cff_get_seac_sid (cff_font *cff, const char *str)
{
card16 i;
if (!cff || !str)
return -1;
for (i = 0; i < CFF_STDSTR_MAX; i++) {
if (streq_ptr(str, cff_stdstr[i]))
return i;
}
return -1;
}
static int cff_match_string (cff_font *cff, const char *str, s_SID sid)
{
card16 i;
if (sid < CFF_STDSTR_MAX) {
return ((streq_ptr(str, cff_stdstr[sid])) ? 1 : 0);
} else {
i = sid - CFF_STDSTR_MAX;
if (cff == NULL || cff->string == NULL || i >= cff->string->count)
_tt_abort("Invalid SID");
if (strlen(str) == (cff->string->offset)[i+1] - (cff->string->offset)[i])
return (!memcmp(str,
(cff->string->data)+(cff->string->offset)[i]-1,
strlen(str))) ? 1 : 0;
}
return 0;
}
void cff_update_string (cff_font *cff)
{
if (cff == NULL)
_tt_abort("CFF font not opened.");
if (cff->string)
cff_release_index(cff->string);
cff->string = cff->_string;
cff->_string = NULL;
}
s_SID cff_add_string (cff_font *cff, const char *str, int unique)
/* Setting unique == 1 eliminates redundant or predefined strings. */
{
card16 idx;
cff_index *strings;
l_offset offset, size;
size_t len = strlen(str);
if (cff == NULL)
_tt_abort("CFF font not opened.");
if (cff->_string == NULL)
cff->_string = cff_new_index(0);
strings = cff->_string;
if (unique) {
/* TODO: do binary search to speed things up */
for (idx = 0; idx < CFF_STDSTR_MAX; idx++) {
if (streq_ptr(cff_stdstr[idx], str))
return idx;
}
for (idx = 0; idx < strings->count; idx++) {
size = strings->offset[idx+1] - strings->offset[idx];
offset = strings->offset[idx];
if (size == len && !memcmp(strings->data+offset-1, str, len))
return (idx + CFF_STDSTR_MAX);
}
}
offset = (strings->count > 0) ? strings->offset[strings->count] : 1;
strings->offset = RENEW(strings->offset, strings->count+2, l_offset);
if (strings->count == 0)
strings->offset[0] = 1;
idx = strings->count;
strings->count += 1;
strings->offset[strings->count] = offset + len;
strings->data = RENEW(strings->data, offset+len-1, card8);
memcpy(strings->data+offset-1, str, len);
return (idx + CFF_STDSTR_MAX);
}
/*
* Encoding and Charset
*
* Encoding and Charset arrays always begin with GID = 1.
*/
int cff_read_encoding (cff_font *cff)
{
cff_encoding *encoding;
int offset, length;
card8 i;
if (cff->topdict == NULL) {
_tt_abort("Top DICT data not found");
}
if (!cff_dict_known(cff->topdict, "Encoding")) {
cff->flag |= ENCODING_STANDARD;
cff->encoding = NULL;
return 0;
}
offset = cff_dict_get(cff->topdict, "Encoding", 0);
if (offset == 0) { /* predefined */
cff->flag |= ENCODING_STANDARD;
cff->encoding = NULL;
return 0;
} else if (offset == 1) {
cff->flag |= ENCODING_EXPERT;
cff->encoding = NULL;
return 0;
}
cff_seek_set(cff, offset);
cff->encoding = encoding = NEW(1, cff_encoding);
encoding->format = tt_get_unsigned_byte(cff->handle);
length = 1;
switch (encoding->format & (~0x80)) {
case 0:
encoding->num_entries = tt_get_unsigned_byte(cff->handle);
(encoding->data).codes = NEW(encoding->num_entries, card8);
for (i=0;i<(encoding->num_entries);i++) {
(encoding->data).codes[i] = tt_get_unsigned_byte(cff->handle);
}
length += encoding->num_entries + 1;
break;
case 1:
{
cff_range1 *ranges;
encoding->num_entries = tt_get_unsigned_byte(cff->handle);
encoding->data.range1 = ranges
= NEW(encoding->num_entries, cff_range1);
for (i=0;i<(encoding->num_entries);i++) {
ranges[i].first = tt_get_unsigned_byte(cff->handle);
ranges[i].n_left = tt_get_unsigned_byte(cff->handle);
}
length += (encoding->num_entries) * 2 + 1;
}
break;
default:
free(encoding);
_tt_abort("Unknown Encoding format");
break;
}
/* Supplementary data */
if ((encoding->format) & 0x80) {
cff_map *map;
encoding->num_supps = tt_get_unsigned_byte(cff->handle);
encoding->supp = map = NEW(encoding->num_supps, cff_map);
for (i=0;i<(encoding->num_supps);i++) {
map[i].code = tt_get_unsigned_byte(cff->handle);
map[i].glyph = tt_get_unsigned_pair(cff->handle); /* SID */
}
length += (encoding->num_supps) * 3 + 1;
} else {
encoding->num_supps = 0;
encoding->supp = NULL;
}
return length;
}
int cff_pack_encoding (cff_font *cff, card8 *dest, int destlen)
{
int len = 0;
cff_encoding *encoding;
card16 i;
if (cff->flag & HAVE_STANDARD_ENCODING || cff->encoding == NULL)
return 0;
if (destlen < 2)
_tt_abort("in cff_pack_encoding(): Buffer overflow");
encoding = cff->encoding;
dest[len++] = encoding->format;
dest[len++] = encoding->num_entries;
switch (encoding->format & (~0x80)) {
case 0:
if (destlen < len + encoding->num_entries)
_tt_abort("in cff_pack_encoding(): Buffer overflow");
for (i=0;i<(encoding->num_entries);i++) {
dest[len++] = (encoding->data).codes[i];
}
break;
case 1:
{
if (destlen < len + (encoding->num_entries)*2)
_tt_abort("in cff_pack_encoding(): Buffer overflow");
for (i=0;i<(encoding->num_entries);i++) {
dest[len++] = (encoding->data).range1[i].first & 0xff;
dest[len++] = (encoding->data).range1[i].n_left;
}
}
break;
default:
_tt_abort("Unknown Encoding format");
break;
}
if ((encoding->format) & 0x80) {
if (destlen < len + (encoding->num_supps)*3 + 1)
_tt_abort("in cff_pack_encoding(): Buffer overflow");
dest[len++] = encoding->num_supps;
for (i=0;i<(encoding->num_supps);i++) {
dest[len++] = (encoding->supp)[i].code;
dest[len++] = ((encoding->supp)[i].glyph >> 8) & 0xff;
dest[len++] = (encoding->supp)[i].glyph & 0xff;
}
}
return len;
}
/* input: code, output: glyph index */
card16 cff_encoding_lookup (cff_font *cff, card8 code)
{
card16 gid = 0;
cff_encoding *encoding;
card16 i;
if (cff->flag & (ENCODING_STANDARD|ENCODING_EXPERT)) {
_tt_abort("Predefined CFF encoding not supported yet");
} else if (cff->encoding == NULL) {
_tt_abort("Encoding data not available");
}
encoding = cff->encoding;
gid = 0;
switch (encoding->format & (~0x80)) {
case 0:
for (i = 0; i < encoding->num_entries; i++) {
if (code == (encoding->data).codes[i]) {
gid = i + 1;
break;
}
}
break;
case 1:
for (i = 0; i < encoding->num_entries; i++) {
if (code >= (encoding->data).range1[i].first &&
code <= (encoding->data).range1[i].first + (encoding->data).range1[i].n_left) {
gid += code - (encoding->data).range1[i].first + 1;
break;
}
gid += (encoding->data).range1[i].n_left + 1;
}
if (i == encoding->num_entries)
gid = 0;
break;
default:
_tt_abort("Unknown Encoding format.");
}
/* Supplementary data */
if (gid == 0 && ((encoding->format) & 0x80)) {
cff_map *map;
if (!encoding->supp)
_tt_abort("No CFF supplementary encoding data read.");
map = encoding->supp;
for (i=0;i<(encoding->num_supps);i++) {
if (code == map[i].code) {
gid = cff_charsets_lookup(cff, map[i].glyph);
break;
}
}
}
return gid;
}
void cff_release_encoding (cff_encoding *encoding)
{
if (encoding) {
switch (encoding->format & (~0x80)) {
case 0:
free(encoding->data.codes);
break;
case 1:
free(encoding->data.range1);
break;
default:
_tt_abort("Unknown Encoding format.");
}
if (encoding->format & 0x80) {
free(encoding->supp);
}
free(encoding);
}
}
int cff_read_charsets (cff_font *cff)
{
cff_charsets *charset;
int offset, length;
card16 count, i;
if (cff->topdict == NULL)
_tt_abort("Top DICT not available");
if (!cff_dict_known(cff->topdict, "charset")) {
cff->flag |= CHARSETS_ISOADOBE;
cff->charsets = NULL;
return 0;
}
offset = cff_dict_get(cff->topdict, "charset", 0);
if (offset == 0) { /* predefined */
cff->flag |= CHARSETS_ISOADOBE;
cff->charsets = NULL;
return 0;
} else if (offset == 1) {
cff->flag |= CHARSETS_EXPERT;
cff->charsets = NULL;
return 0;
} else if (offset == 2) {
cff->flag |= CHARSETS_EXPSUB;
cff->charsets = NULL;
return 0;
}
cff_seek_set(cff, offset);
cff->charsets = charset = NEW(1, cff_charsets);
charset->format = tt_get_unsigned_byte(cff->handle);
charset->num_entries = 0;
count = cff->num_glyphs - 1;
length = 1;
/* Not sure. Not well documented. */
switch (charset->format) {
case 0:
charset->num_entries = cff->num_glyphs - 1; /* no .notdef */
charset->data.glyphs = NEW(charset->num_entries, s_SID);
length += (charset->num_entries) * 2;
for (i=0;i<(charset->num_entries);i++) {
charset->data.glyphs[i] = tt_get_unsigned_pair(cff->handle);
}
count = 0;
break;
case 1:
{
cff_range1 *ranges = NULL;
while (count > 0 && charset->num_entries < cff->num_glyphs) {
ranges = RENEW(ranges, charset->num_entries + 1, cff_range1);
ranges[charset->num_entries].first = tt_get_unsigned_pair(cff->handle);
ranges[charset->num_entries].n_left = tt_get_unsigned_byte(cff->handle);
count -= ranges[charset->num_entries].n_left + 1; /* no-overrap */
charset->num_entries += 1;
charset->data.range1 = ranges;
}
length += (charset->num_entries) * 3;
}
break;
case 2:
{
cff_range2 *ranges = NULL;
while (count > 0 && charset->num_entries < cff->num_glyphs) {
ranges = RENEW(ranges, charset->num_entries + 1, cff_range2);
ranges[charset->num_entries].first = tt_get_unsigned_pair(cff->handle);
ranges[charset->num_entries].n_left = tt_get_unsigned_pair(cff->handle);
count -= ranges[charset->num_entries].n_left + 1; /* non-overrapping */
charset->num_entries += 1;
}
charset->data.range2 = ranges;
length += (charset->num_entries) * 4;
}
break;
default:
free(charset);
_tt_abort("Unknown Charset format");
break;
}
if (count > 0)
_tt_abort("Charset data possibly broken");
return length;
}
int cff_pack_charsets (cff_font *cff, card8 *dest, int destlen)
{
int len = 0;
card16 i;
cff_charsets *charset;
if (cff->flag & HAVE_STANDARD_CHARSETS || cff->charsets == NULL)
return 0;
if (destlen < 1)
_tt_abort("in cff_pack_charsets(): Buffer overflow");
charset = cff->charsets;
dest[len++] = charset->format;
switch (charset->format) {
case 0:
if (destlen < len + (charset->num_entries)*2)
_tt_abort("in cff_pack_charsets(): Buffer overflow");
for (i=0;i<(charset->num_entries);i++) {
s_SID sid = (charset->data).glyphs[i]; /* or CID */
dest[len++] = (sid >> 8) & 0xff;
dest[len++] = sid & 0xff;
}
break;
case 1:
{
if (destlen < len + (charset->num_entries)*3)
_tt_abort("in cff_pack_charsets(): Buffer overflow");
for (i=0;i<(charset->num_entries);i++) {
dest[len++] = ((charset->data).range1[i].first >> 8) & 0xff;
dest[len++] = (charset->data).range1[i].first & 0xff;
dest[len++] = (charset->data).range1[i].n_left;
}
}
break;
case 2:
{
if (destlen < len + (charset->num_entries)*4)
_tt_abort("in cff_pack_charsets(): Buffer overflow");
for (i=0;i<(charset->num_entries);i++) {
dest[len++] = ((charset->data).range2[i].first >> 8) & 0xff;
dest[len++] = (charset->data).range2[i].first & 0xff;
dest[len++] = ((charset->data).range2[i].n_left >> 8) & 0xff;
dest[len++] = (charset->data).range2[i].n_left & 0xff;
}
}
break;
default:
_tt_abort("Unknown Charset format");
break;
}
return len;
}
char* cff_get_glyphname (cff_font *cff, card16 gid)
{
s_SID sid;
sid = cff_charsets_lookup_inverse(cff, gid);
return cff_get_string(cff, sid);
}
card16 cff_glyph_lookup (cff_font *cff, const char *glyph)
{
card16 gid;
cff_charsets *charset;
card16 i, n;
if (cff->flag & (CHARSETS_ISOADOBE|CHARSETS_EXPERT|CHARSETS_EXPSUB)) {
_tt_abort("Predefined CFF charsets not supported yet");
} else if (cff->charsets == NULL) {
_tt_abort("Charsets data not available");
}
/* .notdef always have glyph index 0 */
if (!glyph || streq_ptr(glyph, ".notdef")) {
return 0;
}
charset = cff->charsets;