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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/pdftexdir/writefont.c
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/pdftexdir/writefont.c')
-rw-r--r--Build/source/texk/web2c/pdftexdir/writefont.c720
1 files changed, 720 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/writefont.c b/Build/source/texk/web2c/pdftexdir/writefont.c
new file mode 100644
index 00000000000..ec073e0edff
--- /dev/null
+++ b/Build/source/texk/web2c/pdftexdir/writefont.c
@@ -0,0 +1,720 @@
+/* writefont.c: font descriptors and writing Type 1 fonts.
+Copyright 1996-2018 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 this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ptexlib.h"
+
+/**********************************************************************/
+
+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 */
+
+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 = NULL;
+ fo->first_char = 1;
+ fo->last_char = 0;
+ 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 < 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;
+}
+
+/* initialize data structure for /Widths array object */
+
+static cw_entry *new_cw_entry(void)
+{
+ cw_entry *cw;
+ cw = xtalloc(1, cw_entry);
+ cw->cw_objnum = 0;
+ cw->width = NULL;
+ return cw;
+}
+
+/**********************************************************************/
+/*
+ * 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 =
+ dividescaled(-atan(getslant(f) / 65536.0) * (180 / M_PI),
+ pdffontsize[f], 3);
+ fd->font_dim[ASCENT_CODE].val =
+ dividescaled(getcharheight(f, 'h'), pdffontsize[f], 3);
+ fd->font_dim[CAPHEIGHT_CODE].val =
+ dividescaled(getcharheight(f, 'H'), pdffontsize[f], 3);
+ i = -dividescaled(getchardepth(f, 'y'), pdffontsize[f], 3);
+ fd->font_dim[DESCENT_CODE].val = i < 0 ? i : 0;
+ fd->font_dim[STEMV_CODE].val =
+ dividescaled(getcharwidth(f, '.') / 3, pdffontsize[f], 3);
+ fd->font_dim[XHEIGHT_CODE].val =
+ dividescaled(getxheight(f), pdffontsize[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 =
+ dividescaled(getquad(f), pdffontsize[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)
+{
+ intparm *p = (intparm *) fd->font_dim;
+ if (!p[FONTBBOX1_CODE].set || !p[FONTBBOX2_CODE].set ||
+ !p[FONTBBOX3_CODE].set || !p[FONTBBOX4_CODE].set) {
+ pdftex_warn("font `%s' doesn't have a BoundingBox", fd->fm->ff_name);
+ return;
+ }
+ 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(fd_entry * fd)
+{
+ int i;
+ fix_fontmetrics(fd);
+ 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, const 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);
+ pdfbeginobj(fd->fn_objnum, 1);
+ write_fontname(fd, NULL);
+ pdfendobj();
+}
+
+/**********************************************************************/
+
+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);
+}
+
+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, 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);
+}
+
+static 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.
+ */
+
+static 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 (pdfcharmarked(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.
+ */
+
+static 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 (pdfcharmarked(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;
+}
+
+/**********************************************************************/
+
+static void get_char_range(fo_entry * fo, internalfontnumber f)
+{
+ int i;
+ assert(fo != NULL);
+ for (i = fontbc[f]; i <= fontec[f]; i++) /* search for first_char and last_char */
+ if (pdfcharmarked(f, i))
+ break;
+ fo->first_char = i;
+ for (i = fontec[f]; i >= fontbc[f]; i--)
+ if (pdfcharmarked(f, i))
+ break;
+ fo->last_char = i;
+ if ((fo->first_char > fo->last_char)
+ || !pdfcharmarked(f, fo->first_char)) { /* no character used from this font */
+ fo->last_char = 0;
+ fo->first_char = fo->last_char + 1;
+ }
+}
+
+static void create_charwidth_array(fo_entry * fo, internalfontnumber f)
+{
+ int i;
+ assert(fo != NULL);
+ assert(fo->cw == NULL);
+ fo->cw = new_cw_entry();
+ fo->cw->width = xtalloc(256, integer);
+ for (i = 0; i < fo->first_char; i++)
+ fo->cw->width[i] = 0;
+ for (i = fo->first_char; i <= fo->last_char; i++)
+ fo->cw->width[i] = dividescaled(getcharwidth(f, i), pdffontsize[f], 4);
+ for (i = fo->last_char + 1; i < 256; i++)
+ fo->cw->width[i] = 0;
+}
+
+static void write_charwidth_array(fo_entry * fo)
+{
+ int i, j;
+ assert(fo->cw != NULL);
+ assert(fo->cw->cw_objnum == 0);
+ fo->cw->cw_objnum = pdfnewobjnum();
+ pdfbeginobj(fo->cw->cw_objnum, 1);
+ pdf_puts("[");
+ for (i = fo->first_char; i <= fo->last_char; i++) {
+ pdf_printf("%i", (int) fo->cw->width[i] / 10); /* see adv_char_width() in pdftex.web */
+ if ((j = fo->cw->width[i] % 10) != 0)
+ pdf_printf(".%i", j);
+ if (i != fo->last_char)
+ pdf_puts(" ");
+ }
+ pdf_puts("]\n");
+ pdfendobj();
+}
+
+/**********************************************************************/
+/*
+ * Remark: Font objects from embedded PDF files are never registered
+ * into fo_tree; they are individually written out.
+ */
+
+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);
+}
+
+/**********************************************************************/
+
+static void write_fontfile(fd_entry * fd)
+{
+ assert(is_included(fd->fm));
+ if (is_type1(fd->fm))
+ writet1(fd);
+ 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 = pdfnewobjnum();
+ pdfbegindict(fd->ff_objnum, 0); /* font file stream */
+ 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);
+ pdfbeginstream();
+ fb_flush();
+ pdfendstream();
+}
+
+/**********************************************************************/
+
+static void write_fontdescriptor(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);
+
+ 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 = pdfnewobjnum();
+ pdfbegindict(fd->fd_objnum, 1);
+ pdf_puts("/Type /FontDescriptor\n");
+ write_fontname(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("/Flags %i\n", fd_flags);
+ write_fontmetrics(fd);
+ if (fd->ff_found) {
+ if (getpdfomitcharset() == 0 && is_subsetted(fd->fm) && is_type1(fd->fm)) {
+ /* We don't get CharSet right. For some PDF standards,
+ CharSet is optional, but if it appears, it must be
+ correct. Unfortunately, there seems to be no practical
+ way we can guarantee correctness with precomposed accent
+ characters in our usual fonts (EC, TX, etc.):
+ https://mailman.ntg.nl/pipermail/ntg-pdftex/2018-June/004251.html
+
+ But for PDF/A-1, apparently it is required, regardless:
+ https://mailman.ntg.nl/pipermail/ntg-pdftex/2019-January/004264.html
+
+ Whereas for PDF/A-2 and PDF/A-3, it can be omitted:
+ https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-and-3-rules#rule-62114-3
+
+ Therefore, whether it is output can be controlled by the
+ user at runtime via \pdfincludecharset. */
+ assert(fd->gl_tree != NULL);
+ avl_t_init(&t, fd->gl_tree);
+ /* Names may appear in any order. */
+ 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);
+ }
+ pdfenddict();
+}
+
+static void write_fontdescriptors(void)
+{
+ 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);
+}
+
+/**********************************************************************/
+
+static 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 */
+ assert(fo->tex_font != 0);
+
+ /* write ToUnicode entry if needed */
+ if ((fixedgentounicode > 0 && fo->fd != NULL
+ && !pdffontnobuiltintounicode[fo->tex_font])
+ || (fo->fd != NULL && fo->fm->tfm_name != NULL
+ && strcmp(fo->fm->tfm_name, "dummy-space")) == 0) {
+ if (fo->fe != NULL) {
+ fo->tounicode_objnum =
+ write_tounicode(fo->fe->glyph_names, fo->fm->tfm_name, 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, NULL);
+ }
+ }
+
+ pdfbegindict(fo->fo_objnum, 1);
+ pdf_puts("/Type /Font\n");
+ pdf_puts("/Subtype /");
+ if (is_type1(fo->fm))
+ pdf_printf("%s\n", "Type1");
+ 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 != NULL);
+ pdf_printf("/FirstChar %i\n/LastChar %i\n/Widths %i 0 R\n",
+ (int) fo->first_char, (int) fo->last_char,
+ (int) fo->cw->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 (pdffontattr[fo->tex_font] != getnullstr()) {
+ pdfprint(pdffontattr[fo->tex_font]);
+ pdf_puts("\n");
+ }
+ pdfenddict();
+}
+
+static void write_fontdictionaries(void)
+{
+ 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 writefontstuff(void)
+{
+ write_fontdescriptors();
+ write_fontencodings(); /* see writeenc.c */
+ write_fontdictionaries();
+}
+
+/**********************************************************************/
+
+static 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 = pdfnewobjnum(); /* 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);
+ }
+ }
+ 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);
+ create_charwidth_array(fo, f);
+ write_charwidth_array(fo);
+ 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_charwidth_array(fo, f);
+ write_charwidth_array(fo);
+ 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);
+}
+
+
+
+/* This is called font_has_subset in luatex, but it returns 1 if any
+ characters from the font are used, and 0 if not (using fontbc and
+ fontec as the endpoints to check), i.e., whether any characters are
+ actually used from the font. */
+
+static int
+font_is_used(internalfontnumber f)
+{
+ int i, s;
+ /* search for |first_char| and |last_char| */
+ for (i = fontbc[f]; i <= fontec[f]; i++)
+ if (pdfcharmarked(f, i))
+ break;
+ s = i;
+ for (i = fontec[f]; i >= fontbc[f]; i--)
+ if (pdfcharmarked(f, i))
+ break;
+ if (s > i)
+ return 0;
+ else
+ return 1;
+}
+
+void
+dopdffont(integer font_objnum, internalfontnumber f)
+{
+ fm_entry *fm;
+ if (!font_is_used(f))
+ return; /* avoid failed assertion in create_fontdictionary,
+ mailman.ntg.nl/pipermail/ntg-pdftex/2018-January/004209.html */
+
+
+ fm = hasfmentry(f) ? (fm_entry *) pdffontmap[f] : NULL;
+ if (fm == NULL || is_pk(fm))
+ writet3(fm, font_objnum, f);
+ else
+ create_fontdictionary(fm, font_objnum, f);
+}
+
+// vim: ts=4