/* Copyright (c) 1996-2006 Han The Thanh, This file is part of pdfTeX. pdfTeX 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. pdfTeX 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 pdfTeX; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA $Id: writefont.c 1139 2008-04-09 14:44:20Z taco $ */ #include "ptexlib.h" extern void writetype0 (fd_entry * fd) ; extern void writetype2 (fd_entry * fd) ; extern unsigned long cidtogid_obj; #ifdef DO_TYPE1C extern void writet1c(fd_entry * fd); /* in writecff.c */ #endif extern void writet1w (fd_entry * fd); /* in writecff.c */ extern void writetype1w (fd_entry * fd); extern integer write_cid_tounicode(fo_entry * fo, internalfontnumber f); /* in tounicode.c */ void write_cid_fontdictionary(fo_entry * fo, internalfontnumber f); void create_cid_fontdictionary(fm_entry * fm, integer font_objnum, internalfontnumber f); /**********************************************************************/ struct avl_table *fo_tree = NULL; /* tree of font dictionaries */ struct avl_table *fd_tree = NULL; /* tree of font descriptor objects */ static int comp_fo_entry(const void *pa, const void *pb, void *p) { return strcmp(((const fo_entry *) pa)->fm->tfm_name, ((const fo_entry *) pb)->fm->tfm_name); } static int comp_fd_entry(const void *pa, const void *pb, void *p) { int i; const fd_entry *p1 = (const fd_entry *) pa, *p2 = (const fd_entry *) pb; assert(p1->fm != NULL && is_fontfile(p1->fm) && p2->fm != NULL && is_fontfile(p2->fm)); if ((i = strcmp(p1->fm->ff_name, p2->fm->ff_name)) != 0) return i; cmp_return(p1->fm->slant, p2->fm->slant); cmp_return(p1->fm->extend, p2->fm->extend); return 0; } /**********************************************************************/ /* initialize data structure for /Type /Font */ fo_entry *new_fo_entry(void) { fo_entry *fo; fo = xtalloc(1, fo_entry); fo->fo_objnum = 0; fo->tex_font = 0; fo->fm = NULL; fo->fd = NULL; fo->fe = NULL; fo->cw_objnum = 0; fo->first_char = 1; fo->last_char = 0; fo->tx_tree = NULL; fo->tounicode_objnum = 0; return fo; } /* initialize data structure for /Type /FontDescriptor */ fd_entry *new_fd_entry(void) { fd_entry *fd; int i; fd = xtalloc(1, fd_entry); fd->fd_objnum = 0; fd->fontname = NULL; fd->subset_tag = NULL; fd->ff_found = false; fd->ff_objnum = 0; fd->fn_objnum = 0; fd->all_glyphs = false; fd->write_ttf_glyph_names = false; for (i = 0; i < INT_KEYS_NUM; i++) { fd->font_dim[i].val = 0; fd->font_dim[i].set = false; } fd->fe = NULL; fd->builtin_glyph_names = NULL; fd->fm = NULL; fd->tx_tree = NULL; fd->gl_tree = NULL; return fd; } /**********************************************************************/ /* * Only fallback values of font metrics are taken from the TFM info * of f by preset_fontmetrics(). During reading of the font file, * these values are replaced by metrics from the font, if available. */ static void preset_fontmetrics(fd_entry * fd, internalfontnumber f) { int i; fd->font_dim[ITALIC_ANGLE_CODE].val = divide_scaled(-atan(get_slant(f) / 65536.0) * (180 / M_PI), pdf_font_size(f), 3); fd->font_dim[ASCENT_CODE].val = divide_scaled(char_height(f, 'h'), pdf_font_size(f), 3); fd->font_dim[CAPHEIGHT_CODE].val = divide_scaled(char_height(f, 'H'), pdf_font_size(f), 3); i = -divide_scaled(char_depth(f, 'y'), pdf_font_size(f), 3); fd->font_dim[DESCENT_CODE].val = i < 0 ? i : 0; fd->font_dim[STEMV_CODE].val = divide_scaled(char_width(f, '.') / 3, pdf_font_size(f), 3); fd->font_dim[XHEIGHT_CODE].val = divide_scaled(get_x_height(f), pdf_font_size(f), 3); fd->font_dim[FONTBBOX1_CODE].val = 0; fd->font_dim[FONTBBOX2_CODE].val = fd->font_dim[DESCENT_CODE].val; fd->font_dim[FONTBBOX3_CODE].val = divide_scaled(get_quad(f), pdf_font_size(f), 3); fd->font_dim[FONTBBOX4_CODE].val = fd->font_dim[CAPHEIGHT_CODE].val > fd->font_dim[ASCENT_CODE].val ? fd->font_dim[CAPHEIGHT_CODE].val : fd->font_dim[ASCENT_CODE].val; for (i = 0; i < INT_KEYS_NUM; i++) fd->font_dim[i].set = true; } static void write_fontmetrics(fd_entry * fd) { int i; if (fd->font_dim[FONTBBOX1_CODE].set && fd->font_dim[FONTBBOX2_CODE].set && fd->font_dim[FONTBBOX3_CODE].set && fd->font_dim[FONTBBOX4_CODE].set) pdf_printf("/%s [%i %i %i %i]\n", font_key[FONTBBOX1_CODE].pdfname, (int) fd->font_dim[FONTBBOX1_CODE].val, (int) fd->font_dim[FONTBBOX2_CODE].val, (int) fd->font_dim[FONTBBOX3_CODE].val, (int) fd->font_dim[FONTBBOX4_CODE].val); for (i = 0; i < GEN_KEY_NUM; i++) if (fd->font_dim[i].set) pdf_printf("/%s %i\n", font_key[i].pdfname, fd->font_dim[i].val); } /**********************************************************************/ static void preset_fontname(fo_entry * fo) { if (fo->fm->ps_name != NULL) fo->fd->fontname = xstrdup(fo->fm->ps_name); /* just fallback */ else fo->fd->fontname = xstrdup(fo->fm->tfm_name); } static void write_fontname(fd_entry * fd, char *key) { assert(fd->fontname != NULL); pdf_puts("/"); if (key != NULL) pdf_printf("%s /", key); if (fd->subset_tag != NULL) pdf_printf("%s+", fd->subset_tag); pdf_printf("%s\n", fd->fontname); } static void write_fontname_object(fd_entry * fd) { assert(fd->fn_objnum != 0); pdf_begin_obj(fd->fn_objnum, 1); write_fontname(fd, NULL); pdf_end_obj(); } /**********************************************************************/ fd_entry *lookup_fd_entry(char *s, integer slant, integer extend) { fd_entry fd; fm_entry fm; assert(s != NULL); fm.ff_name = s; fm.slant = slant; fm.extend = extend; fd.fm = &fm; if (fd_tree == NULL) { fd_tree = avl_create(comp_fd_entry, NULL, &avl_xallocator); assert(fd_tree != NULL); } return (fd_entry *) avl_find(fd_tree, &fd); } fd_entry *lookup_fontdescriptor(fo_entry * fo) { assert(fo != NULL); assert(fo->fm != NULL); assert(is_fontfile(fo->fm)); return lookup_fd_entry(fo->fm->ff_name, fo->fm->slant, fo->fm->extend); } void register_fd_entry(fd_entry * fd) { void **aa; if (fd_tree == NULL) { fd_tree = avl_create(comp_fd_entry, NULL, &avl_xallocator); assert(fd_tree != NULL); } assert(fd != NULL && fd->fm != NULL && is_fontfile(fd->fm)); assert(lookup_fd_entry(fd->fm->ff_name, fd->fm->slant, fd->fm->extend) == NULL); /* font descriptor not yet registered */ aa = avl_probe(fd_tree, fd); assert(aa != NULL); } void create_fontdescriptor(fo_entry * fo, internalfontnumber f) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fd == NULL); fo->fd = new_fd_entry(); preset_fontname(fo); preset_fontmetrics(fo->fd, f); fo->fd->fe = fo->fe; /* encoding needed by TrueType writing */ fo->fd->fm = fo->fm; /* map entry needed by TrueType writing */ fo->fd->gl_tree = avl_create(comp_string_entry, NULL, &avl_xallocator); assert(fo->fd->gl_tree != NULL); } /**********************************************************************/ /* * For all used characters of TeX font f, get corresponding glyph names * from external reencoding (.enc) file and collect these in the glyph * tree gl_tree of font descriptor fd referenced by font dictionary fo. */ void mark_reenc_glyphs(fo_entry * fo, internalfontnumber f) { int i; char **g; void **aa; assert(fo->fe != NULL); if (is_subsetted(fo->fm)) { assert(is_included(fo->fm)); /* mark glyphs from TeX (externally reencoded characters) */ g = fo->fe->glyph_names; for (i = fo->first_char; i <= fo->last_char; i++) { if (pdf_char_marked(f, i) && g[i] != notdef && (char *) avl_find(fo->fd->gl_tree, g[i]) == NULL) { aa = avl_probe(fo->fd->gl_tree, xstrdup(g[i])); assert(aa != NULL); } } } } /* * Function mark_chars() has 2 uses: * 1. Mark characters as chars on TeX level. * 2. Mark encoding pairs used by TeX to optimize encoding vector. */ struct avl_table *mark_chars(fo_entry * fo, struct avl_table *tx_tree, internalfontnumber f) { int i, *j; void **aa; if (tx_tree == NULL) { tx_tree = avl_create(comp_int_entry, NULL, &avl_xallocator); assert(tx_tree != NULL); } for (i = fo->first_char; i <= fo->last_char; i++) { if (pdf_char_marked(f, i) && (int *) avl_find(tx_tree, &i) == NULL) { j = xtalloc(1, int); *j = i; aa = avl_probe(tx_tree, j); assert(aa != NULL); } } return tx_tree; } /**********************************************************************/ void get_char_range(fo_entry * fo, internalfontnumber f) { int i; assert(fo != NULL); for (i = font_bc(f); i <= font_ec(f); i++) /* search for first_char and last_char */ if (pdf_char_marked(f, i)) break; fo->first_char = i; for (i = font_ec(f); i >= font_bc(f); i--) if (pdf_char_marked(f, i)) break; fo->last_char = i; if ((fo->first_char > fo->last_char) || !pdf_char_marked(f, fo->first_char)) { /* no character used from this font */ fo->last_char = 0; fo->first_char = fo->last_char + 1; } } static void write_charwidth_array(fo_entry * fo, internalfontnumber f) { int i, j, *ip, *fip, width; struct avl_traverser t; assert(fo->tx_tree != NULL); assert(fo->cw_objnum == 0); fo->cw_objnum = pdf_new_objnum(); pdf_begin_obj(fo->cw_objnum, 1); avl_t_init(&t, fo->tx_tree); fip = (int *) avl_t_first(&t, fo->tx_tree); assert(fip != NULL); pdf_puts("["); for (ip = fip, j = *ip; ip != NULL; ip = (int *) avl_t_next(&t)) { if (ip != fip) pdf_puts(" "); i = *ip; while (j < i - 1) { pdf_puts("0 "); j++; } j = i; width = divide_scaled(char_width(f, i), pdf_font_size(f), 4); pdf_printf("%i", (int) width / 10); /* see adv_char_width() in pdftex.web */ if ((width = width % 10) != 0) pdf_printf(".%i", width); } pdf_puts("]\n"); pdf_end_obj(); } /**********************************************************************/ /* * Remark: Font objects from embedded PDF files are never registered * into fo_tree; they are individually written out. */ fo_entry *lookup_fo_entry(char *s) { fo_entry fo; fm_entry fm; assert(s != NULL); fm.tfm_name = s; fo.fm = &fm; if (fo_tree == NULL) { fo_tree = avl_create(comp_fo_entry, NULL, &avl_xallocator); assert(fo_tree != NULL); } return (fo_entry *) avl_find(fo_tree, &fo); } void register_fo_entry(fo_entry * fo) { void **aa; if (fo_tree == NULL) { fo_tree = avl_create(comp_fo_entry, NULL, &avl_xallocator); assert(fo_tree != NULL); } assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fm->tfm_name != NULL); assert (lookup_fo_entry(fo->fm->tfm_name) == NULL) ; aa = avl_probe(fo_tree, fo); assert(aa != NULL); } /**********************************************************************/ static void write_fontfile(fd_entry * fd) { assert(is_included(fd->fm)); if (is_cidkeyed(fd->fm)) { if (is_opentype(fd->fm)) writetype0(fd); else if (is_truetype(fd->fm)) writetype2(fd); else if (is_type1(fd->fm)) writetype1w(fd); else assert(0); } else { if (is_type1(fd->fm)) #ifdef DO_TYPE1C writet1c(fd); #else writet1(fd); #endif else if (is_truetype(fd->fm)) writettf(fd); else if (is_opentype(fd->fm)) writeotf(fd); else assert(0); } if (!fd->ff_found) return; assert(fd->ff_objnum == 0); fd->ff_objnum = pdf_new_objnum(); pdf_begin_dict(fd->ff_objnum, 0); /* font file stream */ if (is_cidkeyed(fd->fm)) { /* No subtype is used for TrueType-based OpenType fonts */ if (is_opentype(fd->fm) || is_type1(fd->fm)) pdf_puts("/Subtype /CIDFontType0C\n"); /* else pdf_puts("/Subtype /OpenType\n");*/ } else { if (is_type1(fd->fm)) pdf_printf("/Length1 %i\n/Length2 %i\n/Length3 %i\n", (int) t1_length1, (int) t1_length2, (int) t1_length3); else if (is_truetype(fd->fm)) pdf_printf("/Length1 %i\n", (int) ttf_length); else if (is_opentype(fd->fm)) pdf_puts("/Subtype /Type1C\n"); else assert(0); } pdf_begin_stream(); fb_flush(); pdf_end_stream(); } /**********************************************************************/ static void write_fontdescriptor(fd_entry * fd) { char *glyph; struct avl_traverser t; assert(fd != NULL && fd->fm != NULL); if (is_fontfile(fd->fm)) write_fontfile(fd); /* this will set fd->ff_found if font file is found */ if (fd->fn_objnum != 0) write_fontname_object(fd); if (fd->fd_objnum == 0) fd->fd_objnum = pdf_new_objnum(); pdf_begin_dict(fd->fd_objnum, 1); pdf_puts("/Type /FontDescriptor\n"); write_fontname(fd, "FontName"); if (!fd->ff_found && fd->fm->fd_flags == 4) pdf_puts("/Flags 34\n"); /* assumes a roman sans serif font */ else pdf_printf("/Flags %i\n", (int) fd->fm->fd_flags); write_fontmetrics(fd); if (is_cidkeyed(fd->fm)) { if (is_type1(fd->fm)) pdf_printf("/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else if (is_truetype(fd->fm)) pdf_printf("/FontFile2 %i 0 R\n", (int) fd->ff_objnum); else if (is_opentype(fd->fm)) pdf_printf("/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else assert(0); } else { if (fd->ff_found) { if (is_subsetted(fd->fm) && is_type1(fd->fm)) { /* /CharSet is optional; names may appear in any order */ assert(fd->gl_tree != NULL); avl_t_init(&t, fd->gl_tree); pdf_puts("/CharSet ("); for (glyph = (char *) avl_t_first(&t, fd->gl_tree); glyph != NULL; glyph = (char *) avl_t_next(&t)) pdf_printf("/%s", glyph); pdf_puts(")\n"); } if (is_type1(fd->fm)) pdf_printf("/FontFile %i 0 R\n", (int) fd->ff_objnum); else if (is_truetype(fd->fm)) pdf_printf("/FontFile2 %i 0 R\n", (int) fd->ff_objnum); else if (is_opentype(fd->fm)) pdf_printf("/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else assert(0); } } /* TODO: Optional keys for CID fonts. The most interesting ones are /Style << /Panose <12-byte string>>> and /CIDSET the latter can be used in subsets, to give the included CIDs as a bitmap on the whole list. */ pdf_end_dict(); } void write_fontdescriptors() { fd_entry *fd; struct avl_traverser t; if (fd_tree == NULL) return; avl_t_init(&t, fd_tree); for (fd = (fd_entry *) avl_t_first(&t, fd_tree); fd != NULL; fd = (fd_entry *) avl_t_next(&t)) write_fontdescriptor(fd); } /**********************************************************************/ void write_fontdictionary(fo_entry * fo) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fo_objnum != 0); /* reserved as pdf_font_num(f) in pdftex.web */ /* write ToUnicode entry if needed */ if (fixed_gen_tounicode > 0 && fo->fd != NULL) { if (fo->fe != NULL) { fo->tounicode_objnum = write_tounicode(fo->fe->glyph_names, fo->fe->name); } else if (is_type1(fo->fm)) { assert(fo->fd->builtin_glyph_names != NULL); fo->tounicode_objnum = write_tounicode(fo->fd->builtin_glyph_names, fo->fm->tfm_name); } } pdf_begin_dict(fo->fo_objnum, 1); pdf_puts("/Type /Font\n"); pdf_puts("/Subtype /"); if (is_type1(fo->fm)) #ifdef DO_TYPE1C pdf_printf("%s\n", "Type1C"); #else pdf_printf("%s\n", "Type1"); #endif else if (is_truetype(fo->fm)) pdf_printf("%s\n", "TrueType"); else if (is_opentype(fo->fm)) pdf_printf("%s\n", "Type1"); else assert(0); assert(fo->fd != NULL && fo->fd->fd_objnum != 0); write_fontname(fo->fd, "BaseFont"); pdf_printf("/FontDescriptor %i 0 R\n", (int) fo->fd->fd_objnum); assert(fo->cw_objnum != 0); pdf_printf("/FirstChar %i\n/LastChar %i\n/Widths %i 0 R\n", (int) fo->first_char, (int) fo->last_char, (int) fo->cw_objnum); if ((is_type1(fo->fm) || is_opentype(fo->fm)) && fo->fe != NULL && fo->fe->fe_objnum != 0) pdf_printf("/Encoding %i 0 R\n", (int) fo->fe->fe_objnum); if (fo->tounicode_objnum != 0) pdf_printf("/ToUnicode %i 0 R\n", (int) fo->tounicode_objnum); if (pdf_font_attr(fo->tex_font) != get_nullstr()) { pdf_print(pdf_font_attr(fo->tex_font)); pdf_puts("\n"); } pdf_end_dict(); } void write_fontdictionaries() { fo_entry *fo; struct avl_traverser t; if (fo_tree == NULL) return; avl_t_init(&t, fo_tree); for (fo = (fo_entry *) avl_t_first(&t, fo_tree); fo != NULL; fo = (fo_entry *) avl_t_next(&t)) write_fontdictionary(fo); } /**********************************************************************/ /* * Final flush of all font related stuff by call from * @= in pdftex.web. */ void write_fontstuff() { write_fontdescriptors(); write_fontencodings(); /* see writeenc.c */ write_fontdictionaries(); } /**********************************************************************/ void create_fontdictionary(fm_entry * fm, integer font_objnum, internalfontnumber f) { fo_entry *fo = new_fo_entry(); get_char_range(fo, f); /* set fo->first_char and fo->last_char from f */ if (fo->last_char>255) fo->last_char=255; /* added 9-4-2008, mantis #25 */ assert(fo->last_char >= fo->first_char); fo->fm = fm; fo->fo_objnum = font_objnum; fo->tex_font = f; if (is_reencoded(fo->fm)) { /* at least the map entry tells so */ fo->fe = get_fe_entry(fo->fm->encname); /* returns NULL if .enc file couldn't be opened */ if (fo->fe != NULL && (is_type1(fo->fm) || is_opentype(fo->fm))) { if (fo->fe->fe_objnum == 0) fo->fe->fe_objnum = pdf_new_objnum(); /* then it will be written out */ /* mark encoding pairs used by TeX to optimize encoding vector */ fo->fe->tx_tree = mark_chars(fo, fo->fe->tx_tree, f); } } fo->tx_tree = mark_chars(fo, fo->tx_tree, f); /* for write_charwidth_array() */ write_charwidth_array(fo, f); if (!is_builtin(fo->fm)) { if (is_type1(fo->fm)) { if ((fo->fd = lookup_fontdescriptor(fo)) == NULL) { create_fontdescriptor(fo, f); register_fd_entry(fo->fd); } } else create_fontdescriptor(fo, f); if (fo->fe != NULL) { mark_reenc_glyphs(fo, f); if (!is_type1(fo->fm)) { /* mark reencoded characters as chars on TeX level */ assert(fo->fd->tx_tree == NULL); fo->fd->tx_tree = mark_chars(fo, fo->fd->tx_tree, f); if (is_truetype(fo->fm)) fo->fd->write_ttf_glyph_names = true; } } else /* mark non-reencoded characters as chars on TeX level */ fo->fd->tx_tree = mark_chars(fo, fo->fd->tx_tree, f); if (!is_type1(fo->fm)) write_fontdescriptor(fo->fd); } else { /* builtin fonts still need the /Widths array and /FontDescriptor * (to avoid error 'font FOO contains bad /BBox') */ create_fontdescriptor(fo, f); write_fontdescriptor(fo->fd); if (!is_std_t1font(fo->fm)) pdftex_warn("font `%s' is not a standard font; " "I suppose it is available to your PDF viewer then", fo->fm->ps_name); } if (is_type1(fo->fm)) register_fo_entry(fo); else write_fontdictionary(fo); } /**********************************************************************/ void do_pdf_font(integer font_objnum, internalfontnumber f) { fm_entry *fm; /* This is not 100% true: CID is actually needed whenever (and * only) there are more than 256 separate glyphs used. But for * now, just assume the user knows what he is doing; */ if (font_encodingbytes(f)==2) { /* Create a virtual font map entry, as this is needed by the * rest of the font inclusion mechanism. */ fm = new_fm_entry(); fm->tfm_name = font_name(f); /* or whatever, not a real tfm */ fm->ff_name = font_filename(f); /* the actual file */ fm->encname = font_encodingname(f); /* for the CIDSystemInfo */ fm->ps_name = font_fullname(f); /* the true name */ fm->slant = font_slant(f); /* slant factor */ fm->extend = font_extend(f); /* extension factor */ fm->fd_flags = 4; /* can perhaps be done better */ fm->in_use = true; switch (font_format(f)) { case opentype_format: set_opentype(fm); break; case truetype_format: set_truetype(fm); break; case type1_format: set_type1(fm); break; default: pdftex_fail("writefont.c: The file format (%s) for font `%s' is incompatible with wide characters\n", font_format_name(f),font_name(f)); } /* This makes "unknown" default to subsetted inclusion */ if (font_embedding(f)!=no_embedding) { set_included(fm); if (font_embedding(f)!=full_embedding) { set_subsetted(fm); } } set_cidkeyed(fm); create_cid_fontdictionary(fm, font_objnum, f); } else { fm = hasfmentry(f) ? (fm_entry *) font_map(f) : NULL; if (fm == NULL || (fm->ps_name == NULL && fm->ff_name == NULL)) writet3(font_objnum, f); else create_fontdictionary(fm, font_objnum, f); } } /**********************************************************************/ /* The glyph width is included in |glw_entry|, because that width depends on the value it has in the font where it is actually typeset from, not the font that is the 'owner' of the fd entry. TODO: It is possible that the user messes with the metric width, but handling that properly would require access to the 'hmtx' table at this point in the program. */ int comp_glw_entry(const void *pa, const void *pb, void *p) { unsigned short i, j; i = (*(glw_entry *)pa).id; j = (*(glw_entry *)pb).id; cmp_return(i,j); return 0; } void create_cid_fontdescriptor(fo_entry * fo, internalfontnumber f) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fd == NULL); fo->fd = new_fd_entry(); preset_fontname(fo); preset_fontmetrics(fo->fd, f); fo->fd->fe = fo->fe; /* encoding needed by TrueType writing */ fo->fd->fm = fo->fm; /* map entry needed by TrueType writing */ fo->fd->gl_tree = avl_create(comp_glw_entry, NULL, &avl_xallocator); assert(fo->fd->gl_tree != NULL); } /* The values |font_bc()| and |font_ec()| are potentially large character ids, but the strings that are written out use CID indexes, and those are limited to 16-bit values. */ static void mark_cid_subset_glyphs(fo_entry *fo, internal_font_number f) { int i, k; glw_entry *j; void *aa; for (k = 1; k <= max_font_id(); k++) { if ( k == f || -f == pdf_font_num(k)) { for (i = font_bc(k); i <= font_ec(k); i++) { if (char_exists(k,i) && char_used(k,i)) { j = xtalloc(1,glw_entry); j->id = char_index(k,i); j->wd = divide_scaled_n(char_width(k, i), pdf_font_size(k), 10000.0); if ((glw_entry *)avl_find(fo->fd->gl_tree,j) == NULL) { aa = avl_probe(fo->fd->gl_tree, j); assert(aa != NULL); } } } } } } /* It is possible to compress the widths array even better, by using the alternate 'range' syntax and possibly even using /DW to set a default value. There is a some optimization here already: glyphs that are not used do not appear in the widths array at all. We have to make sure that we do not output an (incorrect!) width for a character that exists in the font, but is not used in typesetting. An enormous negative width is used as sentinel value */ static void write_cid_charwidth_array(fo_entry * fo) { int i, j; glw_entry *glyph; struct avl_traverser t; assert(fo->cw_objnum == 0); fo->cw_objnum = pdf_new_objnum(); pdf_begin_obj(fo->cw_objnum, 1); avl_t_init(&t, fo->fd->gl_tree); glyph = (glw_entry *) avl_t_first(&t, fo->fd->gl_tree); assert(glyph != NULL); i = glyph->id; pdf_printf("[ %i [", i); for (; glyph != NULL; glyph = (glw_entry *) avl_t_next(&t)) { j = glyph->wd; if (glyph->id>(i+1)) { pdf_printf("] %i [", glyph->id); j = glyph->wd; } if (glyph->id==(i+1)) pdf_puts(" "); pdf_printf("%i", (j/10)); if ((j % 10) != 0) pdf_printf(".%i", (j % 10)); i = glyph->id; } pdf_puts("]]\n"); pdf_end_obj(); } void create_cid_fontdictionary(fm_entry * fm, integer font_objnum, internalfontnumber f) { fo_entry *fo = new_fo_entry(); get_char_range(fo, f); /* set fo->first_char and fo->last_char from f */ assert(fo->last_char >= fo->first_char); fo->fm = fm; fo->fo_objnum = font_objnum; fo->tex_font = f; create_cid_fontdescriptor (fo, f); mark_cid_subset_glyphs (fo,f); if (is_subsetted(fo->fm)) { /* this is a bit sneaky. |make_subset_tag()| actually expects the glyph tree to contain strings instead of |glw_entry| items. However, all calculations are done using explicit typecasts, so it works out ok. */ make_subset_tag(fo->fd); } write_cid_charwidth_array(fo); write_fontdescriptor(fo->fd); write_cid_fontdictionary(fo,f); } void write_cid_fontdictionary(fo_entry * fo, internalfontnumber f) { int i; fo->tounicode_objnum = write_cid_tounicode(fo,f); pdf_begin_dict(fo->fo_objnum, 1); pdf_puts("/Type /Font\n"); pdf_puts("/Subtype /Type0\n"); pdf_puts("/Encoding /Identity-H\n"); write_fontname(fo->fd, "BaseFont"); i = pdf_new_objnum(); pdf_printf("/DescendantFonts [%i 0 R]\n", i); /* todo: the ToUnicode CMap */ if (fo->tounicode_objnum != 0) pdf_printf("/ToUnicode %i 0 R\n", (int) fo->tounicode_objnum); pdf_end_dict(); pdf_begin_dict(i, 1); pdf_puts("/Type /Font\n"); if (is_opentype(fo->fm) || is_type1(fo->fm)) { pdf_puts("/Subtype /CIDFontType0\n"); } else { pdf_puts("/Subtype /CIDFontType2\n"); pdf_printf("/CIDToGIDMap /Identity\n"); } write_fontname(fo->fd, "BaseFont"); pdf_printf("/FontDescriptor %i 0 R\n", (int) fo->fd->fd_objnum); pdf_printf("/W %i 0 R\n",(int) fo->cw_objnum); pdf_printf("/CIDSystemInfo <<\n"); pdf_printf("/Registry (%s)\n", (font_cidregistry(f)? font_cidregistry(f): "Adobe")); pdf_printf("/Ordering (%s)\n",(font_cidordering(f)? font_cidordering(f) : "Identity")) ; pdf_printf("/Supplement %u\n",(unsigned int)font_cidsupplement(f)); pdf_printf(">>\n"); /* I doubt there is anything useful that could be written here */ /* if (pdf_font_attr(fo->tex_font) != get_nullstr()) { pdf_print(pdf_font_attr(fo->tex_font)); pdf_puts("\n"); } */ pdf_end_dict(); }