diff options
author | Martin Schröder <martin@oneiros.de> | 2008-03-24 15:47:15 +0000 |
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committer | Martin Schröder <martin@oneiros.de> | 2008-03-24 15:47:15 +0000 |
commit | 0b5550c241229764120d133af80a0cbab5937ddd (patch) | |
tree | 81309c18d6f0deba7407813cf15b9add2db375d1 /Build/source/texk/web2c/luatexdir/font/writefont.c | |
parent | 51f55df6a36ce376952a1f2b30bdb4dd0e06548d (diff) |
First step of importing luatex (up to r1121)
git-svn-id: svn://tug.org/texlive/trunk@7124 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/luatexdir/font/writefont.c')
-rw-r--r-- | Build/source/texk/web2c/luatexdir/font/writefont.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/font/writefont.c b/Build/source/texk/web2c/luatexdir/font/writefont.c new file mode 100644 index 00000000000..05257746889 --- /dev/null +++ b/Build/source/texk/web2c/luatexdir/font/writefont.c @@ -0,0 +1,885 @@ +/* +Copyright (c) 1996-2006 Han The Thanh, <thanh@pdftex.org> + +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 1112 2008-03-20 14:46:32Z 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 <stream> + 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 + * @<Output fonts definition@>= 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 */ + 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(); + +} + |