% writefont.w % Copyright 1996-2006 Han The Thanh % Copyright 2006-2010 Taco Hoekwater % This file is part of LuaTeX. % LuaTeX 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. % LuaTeX 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 Lesser General Public % License for more details. % You should have received a copy of the GNU General Public License along % with LuaTeX; if not, see . */ @ @c static const char _svn_version[] = "$Id: writefont.w 4269 2011-05-16 06:08:10Z taco $ " "$URL: http://foundry.supelec.fr/svn/luatex/tags/beta-0.70.1/source/texk/web2c/luatexdir/font/writefont.w $"; #include "ptexlib.h" #include "lua/luatex-api.h" void write_cid_fontdictionary(PDF pdf, fo_entry * fo, internal_font_number f); static void create_cid_fontdictionary(PDF pdf, internal_font_number f); const key_entry font_key[FONT_KEYS_NUM] = { {"Ascent", "Ascender", 1} , {"CapHeight", "CapHeight", 1} , {"Descent", "Descender", 1} , {"ItalicAngle", "ItalicAngle", 1} , {"StemV", "StdVW", 1} , {"XHeight", "XHeight", 1} , {"FontBBox", "FontBBox", 1} , {"", "", 0} , {"", "", 0} , {"", "", 0} , {"FontName", "FontName", 1} }; @ @c 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) { (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) { const fd_entry *p1 = (const fd_entry *) pa, *p2 = (const fd_entry *) pb; (void) p; assert(p1->fm != NULL && is_fontfile(p1->fm) && p2->fm != NULL && is_fontfile(p2->fm)); return strcmp(p1->fm->ff_name, p2->fm->ff_name); } @ initialize data structure for /Type /Font @c static 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 @c 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->all_glyphs = false; fd->write_ttf_glyph_names = false; for (i = 0; i < FONT_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. @c static void preset_fontmetrics(fd_entry * fd, internal_font_number f) { int i; fd->font_dim[ITALIC_ANGLE_CODE].val = 0; fd->font_dim[ASCENT_CODE].val = divide_scaled(char_height(f, 'h'), font_size(f), 3); fd->font_dim[CAPHEIGHT_CODE].val = divide_scaled(char_height(f, 'H'), font_size(f), 3); i = -divide_scaled(char_depth(f, 'y'), 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, font_size(f), 3); fd->font_dim[XHEIGHT_CODE].val = divide_scaled(get_x_height(f), 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), 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 fix_fontmetrics(fd_entry * fd) { int i; intparm *p = (intparm *) fd->font_dim; assert(p[FONTBBOX1_CODE].set && p[FONTBBOX2_CODE].set && p[FONTBBOX3_CODE].set && p[FONTBBOX4_CODE].set); /* make sure there is a rectangle */ if (p[FONTBBOX3_CODE].val < p[FONTBBOX1_CODE].val) { i = p[FONTBBOX3_CODE].val; p[FONTBBOX3_CODE].val = p[FONTBBOX1_CODE].val; p[FONTBBOX1_CODE].val = i; } else if (p[FONTBBOX3_CODE].val == p[FONTBBOX1_CODE].val) p[FONTBBOX3_CODE].val = p[FONTBBOX1_CODE].val + 1; if (p[FONTBBOX4_CODE].val < p[FONTBBOX2_CODE].val) { i = p[FONTBBOX4_CODE].val; p[FONTBBOX4_CODE].val = p[FONTBBOX2_CODE].val; p[FONTBBOX2_CODE].val = i; } else if (p[FONTBBOX4_CODE].val == p[FONTBBOX2_CODE].val) p[FONTBBOX4_CODE].val = p[FONTBBOX2_CODE].val + 1; if (!p[ASCENT_CODE].set) { p[ASCENT_CODE].val = p[FONTBBOX4_CODE].val; p[ASCENT_CODE].set = true; } if (!p[DESCENT_CODE].set) { p[DESCENT_CODE].val = p[FONTBBOX2_CODE].val; p[DESCENT_CODE].set = true; } if (!p[CAPHEIGHT_CODE].set) { p[CAPHEIGHT_CODE].val = p[FONTBBOX4_CODE].val; p[CAPHEIGHT_CODE].set = true; } } static void write_fontmetrics(PDF pdf, fd_entry * fd) { int i; fix_fontmetrics(fd); pdf_printf(pdf, "/%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(pdf, "/%s %i\n", font_key[i].pdfname, fd->font_dim[i].val); } @ @c static void preset_fontname(fo_entry * fo, internal_font_number f) { if (fo->fm->ps_name != NULL) fo->fd->fontname = xstrdup(fo->fm->ps_name); /* just fallback */ else if (font_fullname(f) != NULL) fo->fd->fontname = xstrdup(font_fullname(f)); else fo->fd->fontname = xstrdup(fo->fm->tfm_name); } static void write_fontname(PDF pdf, fd_entry * fd, const char *key) { assert(fd->fontname != NULL); pdf_puts(pdf, "/"); if (key != NULL) pdf_printf(pdf, "%s /", key); if (fd->subset_tag != NULL) pdf_printf(pdf, "%s+", fd->subset_tag); pdf_printf(pdf, "%s\n", fd->fontname); } @ @c fd_entry *lookup_fd_entry(char *s) { fd_entry fd; fm_entry fm; assert(s != NULL); fm.ff_name = s; 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); } static 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); } 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) == NULL); /* font descriptor not yet registered */ aa = avl_probe(fd_tree, fd); assert(aa != NULL); } static void create_fontdescriptor(fo_entry * fo, internal_font_number f) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fd == NULL); fo->fd = new_fd_entry(); preset_fontname(fo, f); 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|. @c static void mark_reenc_glyphs(fo_entry * fo, internal_font_number 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: \item 1. Mark characters as chars on \TeX\ level. \item 2. Mark encoding pairs used by \TeX\ to optimize encoding vector. @c static struct avl_table *mark_chars(fo_entry * fo, struct avl_table *tx_tree, internal_font_number 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; } @ @c static void get_char_range(fo_entry * fo, internal_font_number 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 int font_has_subset(internal_font_number f) { int i, s; for (i = font_bc(f); i <= font_ec(f); i++) /* search for |first_char| and |last_char| */ if (pdf_char_marked(f, i)) break; s = i; for (i = font_ec(f); i >= font_bc(f); i--) if (pdf_char_marked(f, i)) break; if (s > i) return 0; else return 1; } @ @c static void write_charwidth_array(PDF pdf, fo_entry * fo, internal_font_number f) { int i, j, *ip, *fip; struct avl_traverser t; assert(fo->tx_tree != NULL); assert(fo->cw_objnum == 0); fo->cw_objnum = pdf_new_objnum(pdf); pdf_begin_obj(pdf, 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(pdf, "["); for (ip = fip, j = *ip; ip != NULL; ip = (int *) avl_t_next(&t)) { if (ip != fip) pdf_puts(pdf, " "); i = *ip; while (j < i - 1) { pdf_puts(pdf, "0 "); j++; } j = i; pdf_print_charwidth(pdf, f, i); } pdf_puts(pdf, "]\n"); pdf_end_obj(pdf); } @ Remark: Font objects from embedded PDF files are never registered into |fo_tree|; they are individually written out. @c static 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); } static 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); } @ @c static void write_fontfile(PDF pdf, fd_entry * fd) { assert(is_included(fd->fm)); if (is_cidkeyed(fd->fm)) { if (is_opentype(fd->fm)) writetype0(pdf, fd); else if (is_truetype(fd->fm)) writetype2(pdf, fd); else if (is_type1(fd->fm)) writetype1w(pdf, fd); else assert(0); } else { if (is_type1(fd->fm)) writet1(pdf, fd); else if (is_truetype(fd->fm)) writettf(pdf, fd); else if (is_opentype(fd->fm)) writeotf(pdf, fd); else assert(0); } if (!fd->ff_found) return; assert(fd->ff_objnum == 0); fd->ff_objnum = pdf_new_objnum(pdf); pdf_begin_dict(pdf, 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(pdf, "/Subtype /CIDFontType0C\n"); #if 0 else pdf_puts(pdf,"/Subtype /OpenType\n"); #endif } else { if (is_type1(fd->fm)) pdf_printf(pdf, "/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(pdf, "/Length1 %i\n", (int) ttf_length); else if (is_opentype(fd->fm)) pdf_puts(pdf, "/Subtype /Type1C\n"); else assert(0); } pdf_begin_stream(pdf); fb_flush(pdf); pdf_end_stream(pdf); } @ @c int cidset = 0; static void write_fontdescriptor(PDF pdf, fd_entry * fd) { static const int std_flags[] = { /* indices for << start with 0, but bits start with 1, so the numbers * for << are 1 lower than the bits in table 5.20 */ /* *INDENT-OFF* */ 1 + 2 + (1 << 5), /* Courier */ 1 + 2 + (1 << 5) + (1 << 18),/* Courier-Bold */ 1 + 2 + (1 << 5) + (1 << 6), /* Courier-Oblique */ 1 + 2 + (1 << 5) + (1 << 6) + (1 << 18),/* Courier-BoldOblique */ (1 << 5), /* Helvetica */ (1 << 5) + (1 << 18),/* Helvetica-Bold */ (1 << 5) + (1 << 6), /* Helvetica-Oblique */ (1 << 5) + (1 << 6) + (1 << 18),/* Helvetica-BoldOblique */ 4, /* Symbol */ 2 + (1 << 5), /* Times-Roman */ 2 + (1 << 5) + (1 << 18),/* Times-Bold */ 2 + (1 << 5) + (1 << 6), /* Times-Italic */ 2 + (1 << 5) + (1 << 6) + (1 << 18),/* Times-BoldItalic */ 4 /* ZapfDingbats */ /* *INDENT-ON* */ }; char *glyph; struct avl_traverser t; int fd_flags; assert(fd != NULL && fd->fm != NULL); cidset = 0; /* possibly updated by |write_fontfile| */ if (is_fontfile(fd->fm) && is_included(fd->fm)) write_fontfile(pdf, fd); /* this will set |fd->ff_found| if font file is found */ if (fd->fd_objnum == 0) fd->fd_objnum = pdf_new_objnum(pdf); pdf_begin_dict(pdf, fd->fd_objnum, 1); pdf_puts(pdf, "/Type /FontDescriptor\n"); write_fontname(pdf, fd, "FontName"); if (fd->fm->fd_flags != FD_FLAGS_NOT_SET_IN_MAPLINE) fd_flags = (int) fd->fm->fd_flags; else if (fd->ff_found) fd_flags = FD_FLAGS_DEFAULT_EMBED; else { fd_flags = is_std_t1font(fd->fm) ? std_flags[check_std_t1font(fd->fm->ps_name)] : FD_FLAGS_DEFAULT_NON_EMBED; pdftex_warn ("No flags specified for non-embedded font `%s' (%s) (I'm using %i): " "fix your map entry.", fd->fm->ps_name != NULL ? fd->fm->ps_name : "No name given", fd->fm->tfm_name, fd_flags); } pdf_printf(pdf, "/Flags %i\n", fd_flags); write_fontmetrics(pdf, fd); if (fd->ff_found) { if (is_cidkeyed(fd->fm)) { if (is_type1(fd->fm)) pdf_printf(pdf, "/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else if (is_truetype(fd->fm)) pdf_printf(pdf, "/FontFile2 %i 0 R\n", (int) fd->ff_objnum); else if (is_opentype(fd->fm)) pdf_printf(pdf, "/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else assert(0); } else { 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(pdf, "/CharSet ("); for (glyph = (char *) avl_t_first(&t, fd->gl_tree); glyph != NULL; glyph = (char *) avl_t_next(&t)) pdf_printf(pdf, "/%s", glyph); pdf_puts(pdf, ")\n"); } if (is_type1(fd->fm)) pdf_printf(pdf, "/FontFile %i 0 R\n", (int) fd->ff_objnum); else if (is_truetype(fd->fm)) pdf_printf(pdf, "/FontFile2 %i 0 R\n", (int) fd->ff_objnum); else if (is_opentype(fd->fm)) pdf_printf(pdf, "/FontFile3 %i 0 R\n", (int) fd->ff_objnum); else assert(0); } } if (cidset !=0) pdf_printf(pdf, "/CIDSet %i 0 R\n", cidset); /* TODO: Other optional keys for CID fonts. The most interesting one is \.{/Style << /Panose <12-byte string>>>} */ pdf_end_dict(pdf); } static void write_fontdescriptors(PDF pdf) { 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(pdf, fd); } @ @c static void write_fontdictionary(PDF pdf, fo_entry * fo) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fo_objnum != 0); /* reserved as |pdf_font_num(f)| elsewhere */ /* write ToUnicode entry if needed */ if (pdf->gen_tounicode > 0 && fo->fd != NULL) { if (fo->fe != NULL) { fo->tounicode_objnum = write_tounicode(pdf, 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(pdf, fo->fd->builtin_glyph_names, fo->fm->tfm_name); } } pdf_begin_dict(pdf, fo->fo_objnum, 1); pdf_puts(pdf, "/Type /Font\n"); pdf_puts(pdf, "/Subtype /"); if (is_type1(fo->fm)) pdf_printf(pdf, "%s\n", "Type1"); else if (is_truetype(fo->fm)) pdf_printf(pdf, "%s\n", "TrueType"); else if (is_opentype(fo->fm)) pdf_printf(pdf, "%s\n", "Type1"); else assert(0); assert(fo->fd != NULL && fo->fd->fd_objnum != 0); write_fontname(pdf, fo->fd, "BaseFont"); pdf_printf(pdf, "/FontDescriptor %i 0 R\n", (int) fo->fd->fd_objnum); assert(fo->cw_objnum != 0); pdf_printf(pdf, "/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(pdf, "/Encoding %i 0 R\n", (int) fo->fe->fe_objnum); if (fo->tounicode_objnum != 0) pdf_printf(pdf, "/ToUnicode %i 0 R\n", (int) fo->tounicode_objnum); if (pdf_font_attr(fo->tex_font) != get_nullstr() && pdf_font_attr(fo->tex_font) != 0) { pdf_print(pdf, pdf_font_attr(fo->tex_font)); pdf_puts(pdf, "\n"); } pdf_end_dict(pdf); } static void write_fontdictionaries(PDF pdf) { 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(pdf, fo); } @ Final flush of all font related stuff by call from \.{Output fonts definitions} elsewhere @c void write_fontstuff(PDF pdf) { write_fontdescriptors(pdf); write_fontencodings(pdf); /* see \.{writeenc.w} */ write_fontdictionaries(pdf); } @ @c static void create_fontdictionary(PDF pdf, internal_font_number f) { fo_entry *fo = new_fo_entry(); fm_entry *fm = font_map(f); 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 = pdf_font_num(f); 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(pdf); /* 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(pdf, 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(pdf, 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(pdf, 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(pdf, fo); } @ @c static int has_ttf_outlines(fm_entry * fm) { FILE *f = fopen(fm->ff_name, "rb"); if (f != NULL) { int ch1 = getc(f); int ch2 = getc(f); int ch3 = getc(f); int ch4 = getc(f); fclose(f); if (ch1 == 'O' && ch2 == 'T' && ch3 == 'T' && ch4 == 'O') return 0; return 1; } return 0; } void do_pdf_font(PDF pdf, internal_font_number f) { int del_file = 0; fm_entry *fm; /* TODO 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_has_subset(f)) return; if (font_encodingbytes(f) == 2) { /* Create a virtual font map entry, as this is needed by the rest of the font inclusion mechanism. */ fm = font_map(f) = new_fm_entry(); fm->tfm_name = font_name(f); /* or whatever, not a real tfm */ fm->ff_name = font_filename(f); /* the actual file */ if (font_psname(f) != NULL) fm->ps_name = font_psname(f); /* the true name */ else fm->ps_name = font_fullname(f); /* the true name */ if (fm->ff_name && strlen(fm->ff_name) >= 6 && strstr(fm->ff_name, ".dfont") == (fm->ff_name + strlen(fm->ff_name) - 6)) { /* In case of a .dfont, we will extract the correct ttf here, and adjust |fm->ff_name| to point to the temporary file. This file will be deleted later. Todo: keep a nicer name somewhere for the terminal message. */ char *s = FindResourceTtfFont(fm->ff_name, fm->ps_name); if (s != NULL) { fm->ff_name = s; del_file = 1; } else { pdftex_fail ("writefont.c: The file (%s) does not contain font `%s'", fm->ff_name, fm->ps_name); } } fm->encname = font_encodingname(f); /* for the CIDSystemInfo */ fm->slant = font_slant(f); /* slant factor */ set_slantset(fm); fm->extend = font_extend(f); /* extension factor */ set_extendset(fm); fm->fd_flags = 4; /* can perhaps be done better */ set_inuse(fm); switch (font_format(f)) { case opentype_format: if (has_ttf_outlines(fm)) { set_truetype(fm); } else { 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(pdf, f); if (del_file) unlink(fm->ff_name); } else { /* by now |font_map(f)|, if any, should have been set via |pdf_init_font()| */ if ((fm = font_map(f)) == NULL || (fm->ps_name == NULL && fm->ff_name == NULL)) writet3(pdf, f); else create_fontdictionary(pdf, 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. @c static int comp_glw_entry(const void *pa, const void *pb, void *p __attribute__ ((unused))) { unsigned short i, j; i = (unsigned short) (*(const glw_entry *) pa).id; j = (unsigned short) (*(const glw_entry *) pb).id; cmp_return(i, j); return 0; } static void create_cid_fontdescriptor(fo_entry * fo, internal_font_number f) { assert(fo != NULL); assert(fo->fm != NULL); assert(fo->fd == NULL); fo->fd = new_fd_entry(); preset_fontname(fo, f); 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. @c static void mark_cid_subset_glyphs(fo_entry * fo, internal_font_number f) { int i, k, l; glw_entry *j; void *aa; for (k = 1; k <= max_font_id(); k++) { if (k == f || -f == pdf_font_num(k)) { l = font_size(k); for (i = font_bc(k); i <= font_ec(k); i++) { if (quick_char_exists(k, i) && char_used(k, i)) { j = xtalloc(1, glw_entry); j->id = (unsigned) char_index(k, i); j->wd = divide_scaled_n(char_width(k, i), l, 10000.0); if ((glw_entry *) avl_find(fo->fd->gl_tree, j) == NULL) { aa = avl_probe(fo->fd->gl_tree, j); assert(aa != NULL); } else { xfree(j); } } } } } } @ 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 @c static void write_cid_charwidth_array(PDF pdf, 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); pdf_begin_obj(pdf, 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 = (int) glyph->id; pdf_printf(pdf, "[ %i [", i); for (; glyph != NULL; glyph = (glw_entry *) avl_t_next(&t)) { j = glyph->wd; if (glyph->id > (unsigned) (i + 1)) { pdf_printf(pdf, "] %i [", glyph->id); j = glyph->wd; } if (glyph->id == (unsigned) (i + 1)) pdf_puts(pdf, " "); if (j < 0) { pdf_puts(pdf, "-"); j = -j; } pdf_printf(pdf, "%i", (j / 10)); if ((j % 10) != 0) pdf_printf(pdf, ".%i", (j % 10)); i = (int) glyph->id; } pdf_puts(pdf, "]]\n"); pdf_end_obj(pdf); } static void create_cid_fontdictionary(PDF pdf, internal_font_number f) { fm_entry *fm = font_map(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 = pdf_font_num(f); 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(pdf, fo); write_fontdescriptor(pdf, fo->fd); write_cid_fontdictionary(pdf, fo, f); xfree(fo); } @ @c void write_cid_fontdictionary(PDF pdf, fo_entry * fo, internal_font_number f) { int i; fo->tounicode_objnum = write_cid_tounicode(pdf, fo, f); pdf_begin_dict(pdf, fo->fo_objnum, 1); pdf_puts(pdf, "/Type /Font\n"); pdf_puts(pdf, "/Subtype /Type0\n"); pdf_puts(pdf, "/Encoding /Identity-H\n"); write_fontname(pdf, fo->fd, "BaseFont"); i = pdf_new_objnum(pdf); pdf_printf(pdf, "/DescendantFonts [%i 0 R]\n", i); /* todo: the ToUnicode CMap */ if (fo->tounicode_objnum != 0) pdf_printf(pdf, "/ToUnicode %i 0 R\n", (int) fo->tounicode_objnum); pdf_end_dict(pdf); pdf_begin_dict(pdf, i, 1); pdf_puts(pdf, "/Type /Font\n"); if (is_opentype(fo->fm) || is_type1(fo->fm)) { pdf_puts(pdf, "/Subtype /CIDFontType0\n"); } else { pdf_puts(pdf, "/Subtype /CIDFontType2\n"); pdf_printf(pdf, "/CIDToGIDMap /Identity\n"); } write_fontname(pdf, fo->fd, "BaseFont"); pdf_printf(pdf, "/FontDescriptor %i 0 R\n", (int) fo->fd->fd_objnum); pdf_printf(pdf, "/W %i 0 R\n", (int) fo->cw_objnum); pdf_printf(pdf, "/CIDSystemInfo <<\n"); pdf_printf(pdf, "/Registry (%s)\n", (font_cidregistry(f) ? font_cidregistry(f) : "Adobe")); pdf_printf(pdf, "/Ordering (%s)\n", (font_cidordering(f) ? font_cidordering(f) : "Identity")); pdf_printf(pdf, "/Supplement %u\n", (unsigned int) font_cidsupplement(f)); pdf_printf(pdf, ">>\n"); /* I doubt there is anything useful that could be written here */ #if 0 if (pdf_font_attr(fo->tex_font) != get_nullstr()) { pdf_print(pdf_font_attr(fo->tex_font)); pdf_puts(pdf,"\n"); } #endif pdf_end_dict(pdf); }