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/* $Header: /home/cvsroot/dvipdfmx/src/type1c.c,v 1.29 2008/10/13 19:42:48 matthias Exp $
This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2008 by Jin-Hwan Cho, Matthias Franz, and Shunsaku Hirata,
the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
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.
*/
/*
* CFF/OpenType Font support:
*
* Adobe Technical Note #5176, "The Compact Font Format Specfication"
*
* NOTE:
*
* Many CFF/OpenType does not have meaningful/correct CFF encoding.
* Encoding should be expilicitly supplied in the fontmap.
*
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "system.h"
#include "mem.h"
#include "error.h"
#include "dpxfile.h"
#include "pdfobj.h"
#include "pdffont.h"
#include "pdfencoding.h"
#include "unicode.h"
/* Font info. from OpenType tables */
#include "sfnt.h"
#include "tt_aux.h"
#include "cff_types.h"
#include "cff_limits.h"
#include "cff.h"
#include "cff_dict.h"
#include "cs_type2.h"
#include "type1c.h"
#include "tfm.h"
int
pdf_font_open_type1c (pdf_font *font)
{
char *ident, *fontname;
FILE *fp;
sfnt *sfont;
cff_font *cffont;
pdf_obj *descriptor, *tmp;
unsigned long offset = 0;
int encoding_id, embedding;
ASSERT(font);
ident = pdf_font_get_ident (font);
encoding_id = pdf_font_get_encoding(font);
fp = DPXFOPEN(ident, DPX_RES_TYPE_OTFONT);
if (!fp)
return -1;
sfont = sfnt_open(fp);
if (!sfont ||
sfont->type != SFNT_TYPE_POSTSCRIPT ||
sfnt_read_table_directory(sfont, 0) < 0) {
ERROR("Not a CFF/OpenType font?");
}
offset = sfnt_find_table_pos(sfont, "CFF ");
if (offset < 1) {
ERROR("No \"CFF \" table found. Not a CFF/OpenType font?");
}
cffont = cff_open(sfont->stream, offset, 0);
if (!cffont) {
ERROR("Could not read CFF font data");
}
if (cffont->flag & FONTTYPE_CIDFONT) {
cff_close (cffont);
sfnt_close(sfont);
DPXFCLOSE(fp);
return -1;
}
fontname = cff_get_name(cffont);
if (!fontname) {
ERROR("No valid FontName found in CFF/OpenType font.");
}
pdf_font_set_fontname(font, fontname);
RELEASE(fontname);
cff_close(cffont);
/*
* Font like AdobePiStd does not have meaningful built-in encoding.
* Some software generate CFF/OpenType font with incorrect encoding.
*/
if (encoding_id < 0) {
WARN("Built-in encoding used for CFF/OpenType font.");
WARN("CFF font in OpenType font sometimes have strange built-in encoding.");
WARN("If you find text is not encoded properly in the generated PDF file,");
WARN("please specify appropriate \".enc\" file in your fontmap.");
}
pdf_font_set_subtype (font, PDF_FONT_FONTTYPE_TYPE1C);
embedding = pdf_font_get_flag(font, PDF_FONT_FLAG_NOEMBED) ? 0 : 1;
descriptor = pdf_font_get_descriptor(font);
/*
* Create font descriptor from OpenType tables.
* We can also use CFF TOP DICT/Private DICT for this.
*/
tmp = tt_get_fontdesc(sfont, &embedding, -1, 1);
if (!tmp) {
ERROR("Could not obtain neccesary font info from OpenType table.");
return -1;
}
pdf_merge_dict (descriptor, tmp); /* copy */
pdf_release_obj(tmp);
if (!embedding) { /* tt_get_fontdesc may have changed this */
pdf_font_set_flags(font, PDF_FONT_FLAG_NOEMBED);
}
sfnt_close(sfont);
DPXFCLOSE(fp);
return 0;
}
static void
add_SimpleMetrics (pdf_font *font, cff_font *cffont,
double *widths, card16 num_glyphs)
{
pdf_obj *fontdict;
int code, firstchar, lastchar, tfm_id;
char *usedchars;
pdf_obj *tmp_array;
double scaling;
fontdict = pdf_font_get_resource(font);
usedchars = pdf_font_get_usedchars(font);
/* The widhts array in the font dictionary must be given relative
* to the default scaling of 1000:1, not relative to the scaling
* given by the font matrix.
*/
if (cff_dict_known(cffont->topdict, "FontMatrix"))
scaling = 1000*cff_dict_get(cffont->topdict, "FontMatrix", 0);
else
scaling = 1;
tmp_array = pdf_new_array();
if (num_glyphs <= 1) {
/* This should be error. */
firstchar = lastchar = 0;
pdf_add_array(tmp_array, pdf_new_number(0.0));
} else {
firstchar = 255; lastchar = 0;
for (code = 0; code < 256; code++) {
if (usedchars[code]) {
if (code < firstchar) firstchar = code;
if (code > lastchar) lastchar = code;
}
}
if (firstchar > lastchar) {
ERROR("No glyphs used at all!");
pdf_release_obj(tmp_array);
return;
}
tfm_id = tfm_open(pdf_font_get_mapname(font), 0);
for (code = firstchar; code <= lastchar; code++) {
if (usedchars[code]) {
double width;
if (tfm_id < 0) /* tfm is not found */
width = scaling * widths[code];
else
width = 1000. * tfm_get_width(tfm_id, code);
pdf_add_array(tmp_array,
pdf_new_number(ROUND(width, 1.0)));
} else {
pdf_add_array(tmp_array, pdf_new_number(0.0));
}
}
}
if (pdf_array_length(tmp_array) > 0) {
pdf_add_dict(fontdict,
pdf_new_name("Widths"), pdf_ref_obj(tmp_array));
}
pdf_release_obj(tmp_array);
pdf_add_dict(fontdict,
pdf_new_name("FirstChar"), pdf_new_number(firstchar));
pdf_add_dict(fontdict,
pdf_new_name("LastChar"), pdf_new_number(lastchar));
return;
}
int
pdf_font_load_type1c (pdf_font *font)
{
pdf_obj *fontdict, *descriptor;
char *usedchars;
char *fontname, *uniqueTag, *ident, *fullname;
FILE *fp;
int encoding_id;
pdf_obj *fontfile, *stream_dict;
char **enc_vec;
sfnt *sfont;
cff_font *cffont;
cff_index *charstrings, *topdict, *cs_idx;
cff_charsets *charset = NULL;
cff_encoding *encoding = NULL;
long topdict_offset, private_size;
long charstring_len, max_len;
long size, offset = 0;
long stream_data_len = 0;
card8 *stream_data_ptr, *data;
card16 num_glyphs, cs_count, code;
cs_ginfo ginfo;
double nominal_width, default_width, notdef_width;
double widths[256];
int verbose;
ASSERT(font);
verbose = pdf_font_get_verbose();
if (!pdf_font_is_in_use(font)) {
return 0;
}
if (pdf_font_get_flag(font, PDF_FONT_FLAG_NOEMBED)) {
ERROR("Only embedded font supported for CFF/OpenType font.");
}
usedchars = pdf_font_get_usedchars (font);
fontname = pdf_font_get_fontname (font);
ident = pdf_font_get_ident (font);
uniqueTag = pdf_font_get_uniqueTag (font);
if (!usedchars ||
!fontname || !ident) {
ERROR("Unexpected error....");
}
fontdict = pdf_font_get_resource (font);
descriptor = pdf_font_get_descriptor(font);
encoding_id = pdf_font_get_encoding (font);
fp = DPXFOPEN(ident, DPX_RES_TYPE_OTFONT);
if (!fp) {
ERROR("Could not open OpenType font: %s", ident);
}
sfont = sfnt_open(fp);
if (!sfont) {
ERROR("Could not open OpenType font: %s", ident);
}
if (sfnt_read_table_directory(sfont, 0) < 0) {
ERROR("Could not read OpenType table directory: %s", ident);
}
if (sfont->type != SFNT_TYPE_POSTSCRIPT ||
(offset = sfnt_find_table_pos(sfont, "CFF ")) == 0) {
ERROR("Not a CFF/OpenType font ?");
}
cffont = cff_open(fp, offset, 0);
if (!cffont) {
ERROR("Could not open CFF font.");
}
if (cffont->flag & FONTTYPE_CIDFONT) {
ERROR("This is CIDFont...");
}
fullname = NEW(strlen(fontname) + 8, char);
sprintf(fullname, "%6s+%s", uniqueTag, fontname);
/* Offsets from DICTs */
cff_read_charsets(cffont);
if (encoding_id < 0)
cff_read_encoding(cffont);
cff_read_private(cffont);
cff_read_subrs (cffont);
/* FIXME */
cffont->_string = cff_new_index(0);
/* New Charsets data */
charset = NEW(1, cff_charsets);
charset->format = 0;
charset->num_entries = 0;
charset->data.glyphs = NEW(256, s_SID);
/*
* Encoding related things.
*/
enc_vec = NULL;
if (encoding_id >= 0) {
enc_vec = pdf_encoding_get_encoding(encoding_id);
} else {
pdf_obj *tounicode;
/*
* Create enc_vec and ToUnicode CMap for built-in encoding.
*/
enc_vec = NEW(256, char *);
for (code = 0; code < 256; code++) {
if (usedchars[code]) {
card16 gid;
gid = cff_encoding_lookup(cffont, code);
enc_vec[code] = cff_get_string(cffont,
cff_charsets_lookup_inverse(cffont, gid));
} else {
enc_vec[code] = NULL;
}
}
if (!pdf_lookup_dict(fontdict, "ToUnicode")) {
tounicode = pdf_create_ToUnicode_CMap(fullname,
enc_vec, usedchars);
if (tounicode) {
pdf_add_dict(fontdict,
pdf_new_name("ToUnicode"),
pdf_ref_obj (tounicode));
pdf_release_obj(tounicode);
}
}
}
/*
* New Encoding data:
*
* We should not use format 0 here.
* The number of encoded glyphs (num_entries) is limited to 255 in format 0,
* and hence it causes problem for encodings that uses full 256 code-points.
* As we always sort glyphs by encoding, we can avoid this problem simply
* by using format 1; Using full range result in a single range, 0 255.
*
* Creating actual encoding date is delayed to eliminate character codes to
* be mapped to .notdef and to handle multiply-encoded glyphs.
*/
encoding = NEW(1, cff_encoding);
encoding->format = 1;
encoding->num_entries = 0;
encoding->data.range1 = NEW(255, cff_range1);
encoding->num_supps = 0;
encoding->supp = NEW(255, cff_map);
/*
* Charastrings.
*/
offset = (long) cff_dict_get(cffont->topdict, "CharStrings", 0);
cff_seek_set(cffont, offset);
cs_idx = cff_get_index_header(cffont);
/* Offset is now absolute offset ... fixme */
offset = ftell(cffont->stream);
cs_count = cs_idx->count;
if (cs_count < 2) {
ERROR("No valid charstring data found.");
}
/* New CharStrings INDEX */
charstrings = cff_new_index(257); /* 256 + 1 for ".notdef" glyph */
max_len = 2 * CS_STR_LEN_MAX;
charstrings->data = NEW(max_len, card8);
charstring_len = 0;
/*
* Information from OpenType table is rough estimate. Replace with accurate value.
*/
if (cffont->private[0] &&
cff_dict_known(cffont->private[0], "StdVW")) {
double stemv;
stemv = cff_dict_get(cffont->private[0], "StdVW", 0);
pdf_add_dict(descriptor,
pdf_new_name("StemV"), pdf_new_number(stemv));
}
/*
* Widths
*/
if (cffont->private[0] &&
cff_dict_known(cffont->private[0], "defaultWidthX")) {
default_width = (double) cff_dict_get(cffont->private[0], "defaultWidthX", 0);
} else {
default_width = CFF_DEFAULTWIDTHX_DEFAULT;
}
if (cffont->private[0] &&
cff_dict_known(cffont->private[0], "nominalWidthX")) {
nominal_width = (double) cff_dict_get(cffont->private[0], "nominalWidthX", 0);
} else {
nominal_width = CFF_NOMINALWIDTHX_DEFAULT;
}
data = NEW(CS_STR_LEN_MAX, card8);
/* First we add .notdef glyph.
* All Type 1 font requires .notdef glyph to be present.
*/
if (verbose > 2) {
MESG("[glyphs:/.notdef");
}
size = cs_idx->offset[1] - cs_idx->offset[0];
if (size > CS_STR_LEN_MAX) {
ERROR("Charstring too long: gid=%u, %ld bytes", 0, size);
}
charstrings->offset[0] = charstring_len + 1;
seek_absolute(cffont->stream, offset + cs_idx->offset[0] - 1);
fread(data, 1, size, cffont->stream);
charstring_len += cs_copy_charstring(charstrings->data + charstring_len,
max_len - charstring_len,
data, size,
cffont->gsubr, cffont->subrs[0],
default_width, nominal_width, &ginfo);
notdef_width = ginfo.wx;
/*
* Subset font
*/
num_glyphs = 1;
for (code = 0; code < 256; code++) {
card16 gid, j;
s_SID sid_orig, sid;
widths[code] = notdef_width;
if (!usedchars[code] || !enc_vec[code] ||
!strcmp(enc_vec[code], ".notdef"))
continue;
/*
* FIXME:
* cff_get_sid() obtain SID from original String INDEX.
* It should be cff_string_get_sid(string, ...).
* cff_add_string(cff, ...) -> cff_string_add(string, ...).
*/
sid_orig = cff_get_sid (cffont, enc_vec[code]);
sid = sid_orig < CFF_STDSTR_MAX ?
sid_orig : cff_add_string(cffont, enc_vec[code], 0);
/*
* We use "unique = 0" because duplicate strings are impossible
* at this stage unless the original font already had duplicates.
*/
/*
* Check if multiply-encoded glyph.
*/
for (j = 0; j < charset->num_entries; j++) {
if (sid == charset->data.glyphs[j]) {
/* Already have this glyph. */
encoding->supp[encoding->num_supps].code = code;
encoding->supp[encoding->num_supps].glyph = sid;
usedchars[code] = 0; /* Used but multiply-encoded. */
encoding->num_supps += 1;
break;
}
}
if (j < charset->num_entries) {
continue; /* Prevent duplication. */
}
/* This is new encoding entry. */
gid = cff_charsets_lookup(cffont, sid_orig); /* FIXME */
if (gid == 0) {
WARN("Glyph \"%s\" missing in font \"%s\".", enc_vec[code], fontname);
WARN("Maybe incorrect encoding specified.");
usedchars[code] = 0; /* Set unused for writing correct encoding */
continue;
}
if (verbose > 2) {
MESG("/%s", enc_vec[code]);
}
size = cs_idx->offset[gid+1] - cs_idx->offset[gid];
if (size > CS_STR_LEN_MAX) {
ERROR("Charstring too long: gid=%u, %ld bytes", gid, size);
}
if (charstring_len + CS_STR_LEN_MAX >= max_len) {
max_len = charstring_len + 2 * CS_STR_LEN_MAX;
charstrings->data = RENEW(charstrings->data, max_len, card8);
}
charstrings->offset[num_glyphs] = charstring_len + 1;
seek_absolute(cffont->stream, offset + cs_idx->offset[gid] - 1);
fread(data, sizeof(char), size, cffont->stream);
charstring_len += cs_copy_charstring(charstrings->data + charstring_len,
max_len - charstring_len,
data, size,
cffont->gsubr, cffont->subrs[0],
default_width, nominal_width, &ginfo);
widths[code] = ginfo.wx;
charset->data.glyphs[charset->num_entries] = sid;
charset->num_entries += 1;
num_glyphs++;
}
if (verbose > 2) {
MESG("]");
}
RELEASE(data);
/*
* Now we create encoding data.
*/
if (encoding->num_supps > 0)
encoding->format |= 0x80; /* Have supplemantary data. */
else {
RELEASE(encoding->supp); /* FIXME */
}
for (code = 0; code < 256; code++) {
if (!usedchars[code] ||
!enc_vec[code] || !strcmp(enc_vec[code], ".notdef"))
continue;
encoding->data.range1[encoding->num_entries].first = code;
encoding->data.range1[encoding->num_entries].n_left = 0;
code++;
while (code < 256 && usedchars[code] &&
enc_vec[code] && strcmp(enc_vec[code], ".notdef")) {
encoding->data.range1[encoding->num_entries].n_left += 1;
code++;
}
encoding->num_entries += 1;
/* The above while() loop stopped at unused char or code == 256. */
}
/* cleanup */
if (encoding_id < 0 && enc_vec) {
for (code = 0; code < 256; code++) {
if (enc_vec[code]) {
RELEASE(enc_vec[code]);
}
}
RELEASE(enc_vec);
}
cff_release_index(cs_idx);
charstrings->offset[num_glyphs] = charstring_len + 1;
charstrings->count = num_glyphs;
charstring_len = cff_index_size(charstrings);
cffont->num_glyphs = num_glyphs;
/*
* Discard old one, set new data.
*/
if (cffont->charsets)
cff_release_charsets(cffont->charsets);
cffont->charsets = charset;
if (cffont->encoding)
cff_release_encoding(cffont->encoding);
cffont->encoding = encoding;
/*
* We don't use subroutines at all.
*/
if (cffont->gsubr)
cff_release_index(cffont->gsubr);
cffont->gsubr = cff_new_index(0);
if (cffont->subrs[0])
cff_release_index(cffont->subrs[0]);
cffont->subrs[0] = NULL;
/*
* Flag must be reset since cff_pack_encoding(charset) does not write
* encoding(charset) if HAVE_STANDARD_ENCODING(CHARSET) is set. We are
* re-encoding font.
*/
cffont->flag = FONTTYPE_FONT;
/*
* FIXME:
* Update String INDEX to delete unused strings.
*/
cff_dict_update(cffont->topdict, cffont);
if (cffont->private[0])
cff_dict_update(cffont->private[0], cffont);
cff_update_string(cffont);
/*
* Calculate sizes of Top DICT and Private DICT.
* All offset values in DICT are set to long (32-bit) integer
* in cff_dict_pack(), those values are updated later.
*/
topdict = cff_new_index(1);
cff_dict_remove(cffont->topdict, "UniqueID");
cff_dict_remove(cffont->topdict, "XUID");
/*
* Force existence of Encoding.
*/
if (!cff_dict_known(cffont->topdict, "Encoding"))
cff_dict_add(cffont->topdict, "Encoding", 1);
topdict->offset[1] = cff_dict_pack(cffont->topdict,
(card8 *) work_buffer,
WORK_BUFFER_SIZE) + 1;
private_size = 0;
if (cffont->private[0]) {
cff_dict_remove(cffont->private[0], "Subrs"); /* no Subrs */
private_size = cff_dict_pack(cffont->private[0],
(card8 *) work_buffer, WORK_BUFFER_SIZE);
}
/*
* Estimate total size of fontfile.
*/
stream_data_len = 4; /* header size */
stream_data_len += cff_set_name(cffont, fullname);
RELEASE(fullname);
stream_data_len += cff_index_size(topdict);
stream_data_len += cff_index_size(cffont->string);
stream_data_len += cff_index_size(cffont->gsubr);
/* We are using format 1 for Encoding and format 0 for charset.
* TODO: Should implement cff_xxx_size().
*/
stream_data_len += 2 + (encoding->num_entries)*2 + 1 + (encoding->num_supps)*3;
stream_data_len += 1 + (charset->num_entries)*2;
stream_data_len += charstring_len;
stream_data_len += private_size;
/*
* Now we create FontFile data.
*/
stream_data_ptr = NEW(stream_data_len, card8);
/*
* Data Layout order as described in CFF spec., sec 2 "Data Layout".
*/
offset = 0;
/* Header */
offset += cff_put_header(cffont, stream_data_ptr + offset, stream_data_len - offset);
/* Name */
offset += cff_pack_index(cffont->name, stream_data_ptr + offset, stream_data_len - offset);
/* Top DICT */
topdict_offset = offset;
offset += cff_index_size(topdict);
/* Strings */
offset += cff_pack_index(cffont->string,
stream_data_ptr + offset, stream_data_len - offset);
/* Global Subrs */
offset += cff_pack_index(cffont->gsubr,
stream_data_ptr + offset, stream_data_len - offset);
/* Encoding */
cff_dict_set(cffont->topdict, "Encoding", 0, offset);
offset += cff_pack_encoding(cffont,
stream_data_ptr + offset, stream_data_len - offset);
/* charset */
cff_dict_set(cffont->topdict, "charset", 0, offset);
offset += cff_pack_charsets(cffont,
stream_data_ptr + offset, stream_data_len - offset);
/* CharStrings */
cff_dict_set(cffont->topdict, "CharStrings", 0, offset);
offset += cff_pack_index(charstrings,
stream_data_ptr + offset, charstring_len);
cff_release_index(charstrings);
/* Private */
cff_dict_set(cffont->topdict, "Private", 1, offset);
if (cffont->private[0] && private_size > 0)
private_size = cff_dict_pack(cffont->private[0],
stream_data_ptr + offset, private_size);
cff_dict_set(cffont->topdict, "Private", 0, private_size);
offset += private_size;
/* Finally Top DICT */
topdict->data = NEW(topdict->offset[1] - 1, card8);
cff_dict_pack (cffont->topdict, topdict->data, topdict->offset[1] - 1);
cff_pack_index(topdict,
stream_data_ptr + topdict_offset, cff_index_size(topdict));
cff_release_index(topdict);
/* Copyright and Trademark Notice ommited. */
/* Handle Widths in fontdict. */
add_SimpleMetrics(font, cffont, widths, num_glyphs);
/* Close font */
cff_close (cffont);
sfnt_close(sfont);
DPXFCLOSE(fp);
if (verbose > 1) {
MESG("[%u/%u glyphs][%ld bytes]", num_glyphs, cs_count, offset);
}
/*
* CharSet might be recommended for subsetted font, but it is meaningful
* only for Type 1 font...
*/
/*
* Write PDF FontFile data.
*/
fontfile = pdf_new_stream(STREAM_COMPRESS);
stream_dict = pdf_stream_dict(fontfile);
pdf_add_dict(descriptor,
pdf_new_name("FontFile3"), pdf_ref_obj (fontfile));
pdf_add_dict(stream_dict,
pdf_new_name("Subtype"), pdf_new_name("Type1C"));
pdf_add_stream (fontfile, (void *) stream_data_ptr, offset);
pdf_release_obj(fontfile);
RELEASE(stream_data_ptr);
return 0;
}
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