* PDF backend for Halibut
*/
+#include <assert.h>
#include "halibut.h"
+#include "paper.h"
+#include "deflate.h"
+
+#define TREE_BRANCH 8 /* max branching factor in page tree */
paragraph *pdf_config_filename(char *filename)
{
- return NULL;
+ return cmdline_cfg_simple("pdf-filename", filename, NULL);
}
+struct object_Tag {
+ objlist *list;
+ object *next;
+ int number;
+ rdstringc main, stream;
+ int size, fileoff;
+ char *final;
+};
+
+struct objlist_Tag {
+ int number;
+ object *head, *tail;
+};
+
+static void pdf_string(void (*add)(object *, char const *),
+ object *, char const *);
+static void pdf_string_len(void (*add)(object *, char const *),
+ object *, char const *, int);
+static void objref(object *o, object *dest);
+static void objdest(object *o, page_data *p);
+
+static int is_std_font(char const *name);
+
+static void make_pages_node(object *node, object *parent, page_data *first,
+ page_data *last, object *resources,
+ object *mediabox);
+static int make_outline(object *parent, outline_element *start, int n,
+ int open);
+static int pdf_versionid(FILE *fp, word *words);
+
void pdf_backend(paragraph *sourceform, keywordlist *keywords,
- indexdata *idx, void *unused) {
+ indexdata *idx, void *vdoc) {
+ document *doc = (document *)vdoc;
+ int font_index;
+ font_encoding *fe;
+ page_data *page;
+ FILE *fp;
+ char *filename;
+ paragraph *p;
+ objlist olist;
+ object *o, *info, *cat, *outlines, *pages, *resources, *mediabox;
+ int fileoff;
+
+ IGNORE(keywords);
+ IGNORE(idx);
+
+ filename = dupstr("output.pdf");
+ for (p = sourceform; p; p = p->next) {
+ if (p->type == para_Config) {
+ if (!ustricmp(p->keyword, L"pdf-filename")) {
+ sfree(filename);
+ filename = dupstr(adv(p->origkeyword));
+ }
+ }
+ }
+
+ olist.head = olist.tail = NULL;
+ olist.number = 1;
+
+ {
+ char buf[256];
+
+ info = new_object(&olist);
+ objtext(info, "<<\n");
+ if (doc->n_outline_elements > 0) {
+ char *title;
+ int titlelen;
+
+ title =
+ pdf_outline_convert(doc->outline_elements->pdata->outline_title,
+ &titlelen);
+ objtext(info, "/Title ");
+ pdf_string_len(objtext, info, title, titlelen);
+ sfree(title);
+ objtext(info, "\n");
+ }
+ objtext(info, "/Producer ");
+ sprintf(buf, "Halibut, %s", version);
+ pdf_string(objtext, info, buf);
+ objtext(info, "\n>>\n");
+ }
+
+ cat = new_object(&olist);
+ if (doc->n_outline_elements > 0)
+ outlines = new_object(&olist);
+ else
+ outlines = NULL;
+ pages = new_object(&olist);
+ resources = new_object(&olist);
+
+ /*
+ * The catalogue just contains references to the outlines and
+ * pages objects, and the pagelabels dictionary.
+ */
+ objtext(cat, "<<\n/Type /Catalog");
+ if (outlines) {
+ objtext(cat, "\n/Outlines ");
+ objref(cat, outlines);
+ }
+ objtext(cat, "\n/Pages ");
+ objref(cat, pages);
+ /* Halibut just numbers pages 1, 2, 3, ... */
+ objtext(cat, "\n/PageLabels<</Nums[0<</S/D>>]>>");
+ if (outlines)
+ objtext(cat, "\n/PageMode /UseOutlines");
+ objtext(cat, "\n>>\n");
+
+ /*
+ * Set up the resources dictionary, which mostly means
+ * providing all the font objects and names to call them by.
+ */
+ font_index = 0;
+ objtext(resources, "<<\n/ProcSet [/PDF/Text]\n/Font <<\n");
+ for (fe = doc->fonts->head; fe; fe = fe->next) {
+ char fname[40];
+ char buf[80];
+ int i, prev;
+ object *font, *fontdesc;
+ int flags;
+ font_info const *fi = fe->font->info;
+
+ sprintf(fname, "f%d", font_index++);
+ fe->name = dupstr(fname);
+
+ font = new_object(&olist);
+
+ objtext(resources, "/");
+ objtext(resources, fe->name);
+ objtext(resources, " ");
+ objref(resources, font);
+ objtext(resources, "\n");
+
+
+ /*
+ * Construct those parts of the font descriptor that don't dependd
+ * on the file format.
+ */
+ if (!is_std_font(fe->font->info->name)) {
+ fontdesc = new_object(&olist);
+
+#define FF_FIXEDPITCH 0x00000001
+#define FF_SERIF 0x00000002
+#define FF_SYMBOLIC 0x00000004
+#define FF_SCRIPT 0x00000008
+#define FF_NONSYMBOLIC 0x00000020
+#define FF_ITALIC 0x00000040
+#define FF_ALLCAP 0x00010000
+#define FF_SMALLCAP 0x00020000
+#define FF_FORCEBOLD 0x00040000
+
+ objtext(fontdesc, "<<\n/Type /FontDescriptor\n/Name /");
+ objtext(fontdesc, fi->name);
+ flags = 0;
+ if (fi->italicangle) flags |= FF_ITALIC;
+ flags |= FF_NONSYMBOLIC;
+ sprintf(buf, "\n/Flags %d\n", flags);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/FontBBox [%g %g %g %g]\n", fi->fontbbox[0],
+ fi->fontbbox[1], fi->fontbbox[2], fi->fontbbox[3]);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/ItalicAngle %g\n", fi->italicangle);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/Ascent %g\n", fi->ascent);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/Descent %g\n", fi->descent);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/CapHeight %g\n", fi->capheight);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/XHeight %g\n", fi->xheight);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/StemH %g\n", fi->stemh);
+ objtext(fontdesc, buf);
+ sprintf(buf, "/StemV %g\n", fi->stemv);
+ objtext(fontdesc, buf);
+ }
+
+ objtext(font, "<<\n/Type /Font\n/BaseFont /");
+ objtext(font, fe->font->info->name);
+ if (fe->font->info->filetype == TRUETYPE) {
+ object *cidfont = new_object(&olist);
+ object *cmap = new_object(&olist);
+ unsigned short ranges[256];
+ unsigned startidx, nranges, nchars;
+ int start;
+
+ objtext(font, "/Subtype/Type0\n/Encoding ");
+ objtext(cmap, "<</Type/CMap\n/CMapName/");
+ objtext(cmap, fe->name);
+ objtext(cmap, "\n/CIDSystemInfo<</Registry(Adobe)"
+ "/Ordering(Identity)/Supplement 0>>\n");
+ objstream(cmap, "%!PS-Adobe-3.0 Resource-CMap\n"
+ "%%DocumentNeededResources: procset CIDInit\n"
+ "%%IncludeResource: procset CIDInit\n"
+ "%%BeginResource: CMap ");
+ objstream(cmap, fe->name);
+ objstream(cmap, "\n%%Title (");
+ objstream(cmap, fe->name);
+ objstream(cmap, " Adobe Identity 0)\n%%Version: 1\n%%EndComments\n");
+ objstream(cmap, "/CIDInit/ProcSet findresource begin\n");
+ objstream(cmap, "12 dict begin begincmap\n");
+ objstream(cmap, "/CIDSystemInfo 3 dict dup begin\n"
+ "/Registry(Adobe)def/Ordering(Identity)def"
+ "/Supplement 0 def end def\n");
+ objstream(cmap, "/CMapName/");
+ objstream(cmap, fe->name);
+ objstream(cmap, " def/CMapType 0 def/WMode 0 def\n");
+ objstream(cmap, "1 begincodespacerange<00><FF>"
+ "endcodespacerange\n");
+ start = -1; nranges = nchars = 0;
+ for (i = 0; i < 256; i++) {
+ unsigned idx;
+
+ ranges[i] = 0;
+ if (fe->vector[i] == NOGLYPH)
+ continue;
+ idx = sfnt_glyphtoindex(fe->font->info->fontfile,
+ fe->vector[i]);
+ if (start >= 0 && idx - startidx == (unsigned)(i - start)) {
+ if (ranges[start] == 1) {
+ nranges++; nchars--;
+ }
+ ranges[start] = i - start + 1;
+ } else {
+ ranges[i] = 1;
+ start = i;
+ startidx = idx;
+ nchars++;
+ }
+ }
+ i = 0;
+ while (nranges) {
+ unsigned blk = nranges > 100 ? 100 : nranges;
+ nranges -= blk;
+ sprintf(buf, "%u ", blk);
+ objstream(cmap, buf);
+ objstream(cmap, "begincidrange\n");
+ while (blk) {
+ if (ranges[i] > 1) {
+ sprintf(buf, "<%02X>", i);
+ objstream(cmap, buf);
+ sprintf(buf, "<%02X>", i + ranges[i] - 1);
+ objstream(cmap, buf);
+ sprintf(buf, "%hu\n",
+ sfnt_glyphtoindex(fe->font->info->fontfile,
+ fe->vector[i]));
+ objstream(cmap, buf);
+ blk--;
+ }
+ i++;
+ }
+ objstream(cmap, "endcidrange\n");
+ }
+ i = 0;
+ while (nchars) {
+ unsigned blk = nchars > 100 ? 100 : nchars;
+ nchars -= blk;
+ sprintf(buf, "%u ", blk);
+ objstream(cmap, buf);
+ objstream(cmap, "begincidchar\n");
+ while (blk) {
+ if (ranges[i] == 1) {
+ sprintf(buf, "<%02X>", i);
+ objstream(cmap, buf);
+ sprintf(buf, "%hu\n",
+ sfnt_glyphtoindex(fe->font->info->fontfile,
+ fe->vector[i]));
+ objstream(cmap, buf);
+ blk--;
+ }
+ i++;
+ }
+ objstream(cmap, "endcidchar\n");
+ }
+ objstream(cmap, "endcmap CMapName currentdict /CMap "
+ "defineresource pop end end\n%%EndResource\n%%EOF\n");
+
+ objref(font, cmap);
+ objtext(font, "\n/DescendantFonts[");
+ objref(font, cidfont);
+ objtext(font, "]\n");
+ objtext(cidfont, "<<\n/Type/Font\n/Subtype/CIDFontType2\n"
+ "/BaseFont/");
+ objtext(cidfont, fe->font->info->name);
+ objtext(cidfont, "\n/CIDSystemInfo<</Registry(Adobe)"
+ "/Ordering(Identity)/Supplement 0>>\n");
+ objtext(cidfont, "/FontDescriptor ");
+ objref(cidfont, fontdesc);
+ objtext(cidfont, "\n/W[0[");
+ for (i = 0; i < (int)sfnt_nglyphs(fe->font->info->fontfile); i++) {
+ char buf[20];
+ double width;
+ width = find_width(fe->font,
+ sfnt_indextoglyph(fe->font->info->fontfile, i));
+ sprintf(buf, "%g ", 1000.0 * width / FUNITS_PER_PT);
+ objtext(cidfont, buf);
+ }
+ objtext(cidfont, "]]>>\n");
+ } else {
+ objtext(font, "/Subtype /Type1\n");
+ objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences [");
+
+ for (i = 0; i < 256; i++) {
+ char buf[20];
+ if (fe->vector[i] == NOGLYPH)
+ continue;
+ if (i != prev + 1) {
+ sprintf(buf, "\n%d", i);
+ objtext(font, buf);
+ }
+ objtext(font, i % 8 ? "/" : "\n/");
+ objtext(font, glyph_extern(fe->vector[i]));
+ prev = i;
+ }
+
+ objtext(font, "\n]\n>>\n");
+ if (!is_std_font(fe->font->info->name)){
+ object *widths = new_object(&olist);
+ int firstchar = -1, lastchar = -1;
+ for (i = 0; i < 256; i++)
+ if (fe->vector[i] != NOGLYPH) {
+ if (firstchar < 0) firstchar = i;
+ lastchar = i;
+ }
+ sprintf(buf, "/FirstChar %d\n/LastChar %d\n/Widths ",
+ firstchar, lastchar);
+ objtext(font, buf);
+ objref(font, widths);
+ objtext(font, "\n");
+ objtext(widths, "[\n");
+ for (i = firstchar; i <= lastchar; i++) {
+ double width;
+ if (fe->vector[i] == NOGLYPH)
+ width = 0.0;
+ else
+ width = find_width(fe->font, fe->vector[i]);
+ sprintf(buf, "%g\n", 1000.0 * width / FUNITS_PER_PT);
+ objtext(widths, buf);
+ }
+ objtext(widths, "]\n");
+ objtext(font, "/FontDescriptor ");
+ objref(font, fontdesc);
+ }
+
+ }
+
+ if (!is_std_font(fe->font->info->name)) {
+ if (fi->fontfile && fi->filetype == TYPE1) {
+ object *fontfile = new_object(&olist);
+ size_t len;
+ char *ffbuf;
+
+ pf_part1((font_info *)fi, &ffbuf, &len);
+ objstream_len(fontfile, ffbuf, len);
+ sfree(ffbuf);
+ sprintf(buf, "<<\n/Length1 %lu\n", (unsigned long)len);
+ objtext(fontfile, buf);
+ pf_part2((font_info *)fi, &ffbuf, &len);
+ objstream_len(fontfile, ffbuf, len);
+ sfree(ffbuf);
+ sprintf(buf, "/Length2 %lu\n", (unsigned long)len);
+ objtext(fontfile, buf);
+ objtext(fontfile, "/Length3 0\n");
+ objtext(fontdesc, "/FontFile ");
+ objref(fontdesc, fontfile);
+ } else if (fi->fontfile && fi->filetype == TRUETYPE) {
+ object *fontfile = new_object(&olist);
+ size_t len;
+ char *ffbuf;
+
+ sfnt_data((font_info *)fi, &ffbuf, &len);
+ objstream_len(fontfile, ffbuf, len);
+ sprintf(buf, "<<\n/Length1 %lu\n", (unsigned long)len);
+ objtext(fontfile, buf);
+ objtext(fontdesc, "/FontFile2 ");
+ objref(fontdesc, fontfile);
+ }
+ objtext(fontdesc, "\n>>\n");
+ }
+
+ objtext(font, "\n>>\n");
+ }
+ objtext(resources, ">>\n>>\n");
+
+ {
+ char buf[255];
+ mediabox = new_object(&olist);
+ sprintf(buf, "[0 0 %g %g]\n",
+ doc->paper_width / FUNITS_PER_PT,
+ doc->paper_height / FUNITS_PER_PT);
+ objtext(mediabox, buf);
+ }
+
+ /*
+ * Define the page objects for each page, and get each one
+ * ready to have a `Parent' specification added to it.
+ */
+ for (page = doc->pages; page; page = page->next) {
+ object *opage;
+
+ opage = new_object(&olist);
+ page->spare = opage;
+ objtext(opage, "<<\n/Type /Page\n");
+ }
+
+ /*
+ * Recursively build the page tree.
+ */
+ make_pages_node(pages, NULL, doc->pages, NULL, resources, mediabox);
+
/*
- * FIXME
+ * Create and render the individual pages.
*/
- printf("[pdf] %p = %s\n", unused, unused);
+ for (page = doc->pages; page; page = page->next) {
+ object *opage, *cstr;
+ rect *r;
+ text_fragment *frag, *frag_end;
+ char buf[256];
+ int x, y, lx, ly;
+
+ opage = (object *)page->spare;
+ /*
+ * At this point the page dictionary is already
+ * half-written, with /Type and /Parent already present. We
+ * continue from there.
+ */
+
+ /*
+ * The PDF spec says /Resources is required, but also says
+ * that it's inheritable and may be omitted if it's present
+ * in a Pages node. In our case it is: it's present in the
+ * topmost /Pages node because we carefully put it there.
+ * So we don't need a /Resources entry here. The same applies
+ * to /MediaBox.
+ */
+
+ /*
+ * Now we're ready to define a content stream containing
+ * the actual text on the page.
+ */
+ cstr = new_object(&olist);
+ objtext(opage, "/Contents ");
+ objref(opage, cstr);
+ objtext(opage, "\n");
+
+ /*
+ * Render any rectangles on the page.
+ */
+ for (r = page->first_rect; r; r = r->next) {
+ char buf[512];
+ sprintf(buf, "%g %g %g %g re f\n",
+ r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT,
+ r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT);
+ objstream(cstr, buf);
+ }
+
+ objstream(cstr, "BT\n");
+
+ /*
+ * PDF tracks two separate current positions: the position
+ * given in the `line matrix' and the position given in the
+ * `text matrix'. We must therefore track both as well.
+ * They start off at -1 (unset).
+ */
+ lx = ly = -1;
+ x = y = -1;
+
+ frag = page->first_text;
+ while (frag) {
+ /*
+ * For compactness, I'm going to group text fragments
+ * into subsequences that use the same font+size. So
+ * first find the end of this subsequence.
+ */
+ for (frag_end = frag;
+ (frag_end &&
+ frag_end->fe == frag->fe &&
+ frag_end->fontsize == frag->fontsize);
+ frag_end = frag_end->next);
+
+ /*
+ * Now select the text fragment, and prepare to display
+ * the text.
+ */
+ objstream(cstr, "/");
+ objstream(cstr, frag->fe->name);
+ sprintf(buf, " %d Tf ", frag->fontsize);
+ objstream(cstr, buf);
+
+ while (frag && frag != frag_end) {
+ /*
+ * Place the text position for the first piece of
+ * text.
+ */
+ if (lx < 0) {
+ sprintf(buf, "1 0 0 1 %g %g Tm ",
+ frag->x/FUNITS_PER_PT, frag->y/FUNITS_PER_PT);
+ } else {
+ sprintf(buf, "%g %g Td ",
+ (frag->x - lx)/FUNITS_PER_PT,
+ (frag->y - ly)/FUNITS_PER_PT);
+ }
+ objstream(cstr, buf);
+ lx = x = frag->x;
+ ly = y = frag->y;
+
+ /*
+ * See if we're going to use Tj (show a single
+ * string) or TJ (show an array of strings with
+ * x-spacings between them). We determine this by
+ * seeing if there's more than one text fragment in
+ * sequence with the same y-coordinate.
+ */
+ if (frag->next && frag->next != frag_end &&
+ frag->next->y == y) {
+ /*
+ * The TJ strategy.
+ */
+ objstream(cstr, "[");
+ while (frag && frag != frag_end && frag->y == y) {
+ if (frag->x != x) {
+ sprintf(buf, "%g",
+ (x - frag->x) * 1000.0 /
+ (FUNITS_PER_PT * frag->fontsize));
+ objstream(cstr, buf);
+ }
+ pdf_string(objstream, cstr, frag->text);
+ x = frag->x + frag->width;
+ frag = frag->next;
+ }
+ objstream(cstr, "]TJ\n");
+ } else
+ {
+ /*
+ * The Tj strategy.
+ */
+ pdf_string(objstream, cstr, frag->text);
+ objstream(cstr, "Tj\n");
+ frag = frag->next;
+ }
+ }
+ }
+ objstream(cstr, "ET");
+
+ /*
+ * Also, we want an annotation dictionary containing the
+ * cross-references from this page.
+ */
+ if (page->first_xref) {
+ xref *xr;
+ objtext(opage, "/Annots [\n");
+
+ for (xr = page->first_xref; xr; xr = xr->next) {
+ char buf[256];
+
+ objtext(opage, "<</Subtype/Link\n/Rect[");
+ sprintf(buf, "%g %g %g %g",
+ xr->lx / FUNITS_PER_PT, xr->by / FUNITS_PER_PT,
+ xr->rx / FUNITS_PER_PT, xr->ty / FUNITS_PER_PT);
+ objtext(opage, buf);
+ objtext(opage, "]/Border[0 0 0]\n");
+
+ if (xr->dest.type == PAGE) {
+ objtext(opage, "/Dest");
+ objdest(opage, xr->dest.page);
+ } else {
+ objtext(opage, "/A<</S/URI/URI");
+ pdf_string(objtext, opage, xr->dest.url);
+ objtext(opage, ">>");
+ }
+
+ objtext(opage, ">>\n");
+ }
+
+ objtext(opage, "]\n");
+ }
+
+ objtext(opage, ">>\n");
+ }
+
+ /*
+ * Set up the outlines dictionary.
+ */
+ if (outlines) {
+ int topcount;
+ char buf[80];
+
+ objtext(outlines, "<<\n/Type /Outlines\n");
+ topcount = make_outline(outlines, doc->outline_elements,
+ doc->n_outline_elements, TRUE);
+ sprintf(buf, "/Count %d\n>>\n", topcount);
+ objtext(outlines, buf);
+ }
+
+ /*
+ * Assemble the final linear form of every object.
+ */
+ for (o = olist.head; o; o = o->next) {
+ rdstringc rs = {0, 0, NULL};
+ char text[80];
+ deflate_compress_ctx *zcontext;
+ void *zbuf;
+ int zlen;
+
+ sprintf(text, "%d 0 obj\n", o->number);
+ rdaddsc(&rs, text);
+
+ if (o->stream.text) {
+ if (!o->main.text)
+ rdaddsc(&o->main, "<<\n");
+#ifdef PDF_NOCOMPRESS
+ zlen = o->stream.pos;
+ zbuf = snewn(zlen, char);
+ memcpy(zbuf, o->stream.text, zlen);
+ sprintf(text, "/Length %d\n>>\n", zlen);
+#else
+ zcontext = deflate_compress_new(DEFLATE_TYPE_ZLIB);
+ deflate_compress_data(zcontext, o->stream.text, o->stream.pos,
+ DEFLATE_END_OF_DATA, &zbuf, &zlen);
+ deflate_compress_free(zcontext);
+ sprintf(text, "/Filter/FlateDecode\n/Length %d\n>>\n", zlen);
+#endif
+ rdaddsc(&o->main, text);
+ }
+
+ assert(o->main.text);
+ rdaddsc(&rs, o->main.text);
+ sfree(o->main.text);
+
+ if (rs.text[rs.pos-1] != '\n')
+ rdaddc(&rs, '\n');
+
+ if (o->stream.text) {
+ rdaddsc(&rs, "stream\n");
+ rdaddsn(&rs, zbuf, zlen);
+ rdaddsc(&rs, "\nendstream\n");
+ sfree(o->stream.text);
+ sfree(zbuf);
+ }
+
+ rdaddsc(&rs, "endobj\n");
+
+ o->final = rs.text;
+ o->size = rs.pos;
+ }
+
+ /*
+ * Write out the PDF file.
+ */
+
+ if (!strcmp(filename, "-"))
+ fp = stdout;
+ else
+ fp = fopen(filename, "wb");
+ if (!fp) {
+ error(err_cantopenw, filename);
+ return;
+ }
+
+ /*
+ * Header. I'm going to put the version IDs in the header as
+ * well, simply in PDF comments. The PDF Reference also suggests
+ * that binary PDF files contain four top-bit-set characters in
+ * the second line.
+ */
+ fileoff = fprintf(fp, "%%PDF-1.3\n%% L\xc3\xba\xc3\xb0""a\n");
+ for (p = sourceform; p; p = p->next)
+ if (p->type == para_VersionID)
+ fileoff += pdf_versionid(fp, p->words);
+
+ /*
+ * Body
+ */
+ for (o = olist.head; o; o = o->next) {
+ o->fileoff = fileoff;
+ fwrite(o->final, 1, o->size, fp);
+ fileoff += o->size;
+ }
+
+ /*
+ * Cross-reference table
+ */
+ fprintf(fp, "xref\n");
+ assert(olist.head->number == 1);
+ fprintf(fp, "0 %d\n", olist.tail->number + 1);
+ fprintf(fp, "0000000000 65535 f \n");
+ for (o = olist.head; o; o = o->next) {
+ char entry[40];
+ sprintf(entry, "%010d 00000 n \n", o->fileoff);
+ assert(strlen(entry) == 20);
+ fputs(entry, fp);
+ }
+
+ /*
+ * Trailer
+ */
+ fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n/Info %d 0 R\n>>\n",
+ olist.tail->number + 1, cat->number, info->number);
+ fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff);
+
+ if (fp != stdout)
+ fclose(fp);
+
+ sfree(filename);
+}
+
+object *new_object(objlist *list)
+{
+ object *obj = snew(object);
+
+ obj->list = list;
+
+ obj->main.text = NULL;
+ obj->main.pos = obj->main.size = 0;
+ obj->stream.text = NULL;
+ obj->stream.pos = obj->stream.size = 0;
+
+ obj->number = list->number++;
+
+ obj->next = NULL;
+ if (list->tail)
+ list->tail->next = obj;
+ else
+ list->head = obj;
+ list->tail = obj;
+
+ obj->size = 0;
+ obj->final = NULL;
+
+ return obj;
+}
+
+void objtext(object *o, char const *text)
+{
+ rdaddsc(&o->main, text);
+}
+
+void objstream_len(object *o, char const *text, size_t len)
+{
+ rdaddsn(&o->stream, text, len);
+}
+
+void objstream(object *o, char const *text)
+{
+ rdaddsc(&o->stream, text);
+}
+
+static void objref(object *o, object *dest)
+{
+ char buf[40];
+ sprintf(buf, "%d 0 R", dest->number);
+ rdaddsc(&o->main, buf);
+}
+
+static void objdest(object *o, page_data *p) {
+ objtext(o, "[");
+ objref(o, (object *)p->spare);
+ objtext(o, "/XYZ null null null]");
+}
+
+static char const * const stdfonts[] = {
+ "Times-Roman", "Times-Bold", "Times-Italic", "Times-BoldItalic",
+ "Helvetica", "Helvetica-Bold", "Helvetica-Oblique","Helvetica-BoldOblique",
+ "Courier", "Courier-Bold", "Courier-Oblique", "Courier-BoldOblique",
+ "Symbol", "ZapfDingbats"
+};
+
+static int is_std_font(char const *name) {
+ unsigned i;
+ for (i = 0; i < lenof(stdfonts); i++)
+ if (strcmp(name, stdfonts[i]) == 0)
+ return TRUE;
+ return FALSE;
+}
+
+static void make_pages_node(object *node, object *parent, page_data *first,
+ page_data *last, object *resources,
+ object *mediabox)
+{
+ int count;
+ page_data *page;
+ char buf[80];
+
+ objtext(node, "<<\n/Type /Pages\n");
+ if (parent) {
+ objtext(node, "/Parent ");
+ objref(node, parent);
+ objtext(node, "\n");
+ }
+
+ /*
+ * Count the pages in this stretch, to see if there are few
+ * enough to reference directly.
+ */
+ count = 0;
+ for (page = first; page; page = page->next) {
+ count++;
+ if (page == last)
+ break;
+ }
+
+ sprintf(buf, "/Count %d\n/Kids [\n", count);
+ objtext(node, buf);
+
+ if (count > TREE_BRANCH) {
+ int i;
+ page_data *thisfirst, *thislast;
+
+ page = first;
+
+ for (i = 0; i < TREE_BRANCH; i++) {
+ int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH;
+ thisfirst = page;
+ while (number--) {
+ thislast = page;
+ page = page->next;
+ }
+
+ if (thisfirst == thislast) {
+ objref(node, (object *)thisfirst->spare);
+ objtext((object *)thisfirst->spare, "/Parent ");
+ objref((object *)thisfirst->spare, node);
+ objtext((object *)thisfirst->spare, "\n");
+ } else {
+ object *newnode = new_object(node->list);
+ make_pages_node(newnode, node, thisfirst, thislast,
+ NULL, NULL);
+ objref(node, newnode);
+ }
+ objtext(node, "\n");
+ }
+
+ assert(thislast == last || page == NULL);
+
+ } else {
+ for (page = first; page; page = page->next) {
+ objref(node, (object *)page->spare);
+ objtext(node, "\n");
+ objtext((object *)page->spare, "/Parent ");
+ objref((object *)page->spare, node);
+ objtext((object *)page->spare, "\n");
+ if (page == last)
+ break;
+ }
+ }
+
+ objtext(node, "]\n");
+
+ if (resources) {
+ objtext(node, "/Resources ");
+ objref(node, resources);
+ objtext(node, "\n");
+ }
+ if (mediabox) {
+ objtext(node, "/MediaBox ");
+ objref(node, mediabox);
+ objtext(node, "\n");
+ }
+
+ objtext(node, ">>\n");
+}
+
+/*
+ * In text on the page, PDF uses the PostScript font model, which
+ * means that glyphs are identified by PS strings and hence font
+ * encoding can be managed independently of the supplied encoding
+ * of the font. However, in the document outline, the PDF spec
+ * encodes in either PDFDocEncoding (a custom superset of
+ * ISO-8859-1) or UTF-16BE.
+ */
+char *pdf_outline_convert(wchar_t *s, int *len) {
+ char *ret;
+
+ ret = utoa_careful_dup(s, CS_PDF);
+
+ /*
+ * Very silly special case: if the returned string begins with
+ * FE FF, then the PDF reader will mistake it for a UTF-16BE
+ * string. So in this case we give up on PDFDocEncoding and
+ * encode it in UTF-16 straight away.
+ */
+ if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') {
+ sfree(ret);
+ ret = NULL;
+ }
+
+ if (!ret) {
+ ret = utoa_dup_len(s, CS_UTF16BE, len);
+ } else {
+ *len = strlen(ret);
+ }
+
+ return ret;
+}
+
+static int make_outline(object *parent, outline_element *items, int n,
+ int open)
+{
+ int level, totalcount = 0;
+ outline_element *itemp;
+ object *curr, *prev = NULL, *first = NULL, *last = NULL;
+
+ assert(n > 0);
+
+ level = items->level;
+
+ while (n > 0) {
+ char *title;
+ int titlelen;
+
+ /*
+ * Here we expect to be sitting on an item at the given
+ * level. So we start by constructing an outline entry for
+ * that item.
+ */
+ assert(items->level == level);
+
+ title = pdf_outline_convert(items->pdata->outline_title, &titlelen);
+
+ totalcount++;
+ curr = new_object(parent->list);
+ if (!first) first = curr;
+ last = curr;
+ objtext(curr, "<<\n/Title ");
+ pdf_string_len(objtext, curr, title, titlelen);
+ sfree(title);
+ objtext(curr, "\n/Parent ");
+ objref(curr, parent);
+ objtext(curr, "\n/Dest");
+ objdest(curr, items->pdata->first->page);
+ objtext(curr, "\n");
+ if (prev) {
+ objtext(curr, "/Prev ");
+ objref(curr, prev);
+ objtext(curr, "\n");
+
+ objtext(prev, "/Next ");
+ objref(prev, curr);
+ objtext(prev, "\n>>\n");
+ }
+ prev = curr;
+
+ items++, n--;
+ for (itemp = items; itemp < items+n && itemp->level > level;
+ itemp++);
+
+ if (itemp > items) {
+ char buf[80];
+ int count = make_outline(curr, items, itemp - items, FALSE);
+ if (!open)
+ count = -count;
+ else
+ totalcount += count;
+ sprintf(buf, "/Count %d\n", count);
+ objtext(curr, buf);
+ }
+
+ n -= itemp - items;
+ items = itemp;
+ }
+ objtext(prev, ">>\n");
+
+ assert(first && last);
+ objtext(parent, "/First ");
+ objref(parent, first);
+ objtext(parent, "\n/Last ");
+ objref(parent, last);
+ objtext(parent, "\n");
+
+ return totalcount;
+}
+
+static int pdf_versionid(FILE *fp, word *words)
+{
+ int ret;
+
+ ret = fprintf(fp, "%% ");
+
+ for (; words; words = words->next) {
+ char *text;
+ int type;
+
+ switch (words->type) {
+ case word_HyperLink:
+ case word_HyperEnd:
+ case word_UpperXref:
+ case word_LowerXref:
+ case word_XrefEnd:
+ case word_IndexRef:
+ continue;
+ }
+
+ type = removeattr(words->type);
+
+ switch (type) {
+ case word_Normal:
+ text = utoa_dup(words->text, CS_ASCII);
+ break;
+ case word_WhiteSpace:
+ text = dupstr(" ");
+ break;
+ case word_Quote:
+ text = dupstr("'");
+ break;
+ }
+
+ fputs(text, fp);
+ ret += strlen(text);
+ sfree(text);
+ }
+
+ ret += fprintf(fp, "\n");
+
+ return ret;
+}
+
+static void pdf_string_len(void (*add)(object *, char const *),
+ object *o, char const *str, int len)
+{
+ char const *p;
+
+ add(o, "(");
+ for (p = str; len > 0; p++, len--) {
+ char c[10];
+ if (*p < ' ' || *p > '~') {
+ sprintf(c, "\\%03o", 0xFF & (int)*p);
+ } else {
+ int n = 0;
+ if (*p == '\\' || *p == '(' || *p == ')')
+ c[n++] = '\\';
+ c[n++] = *p;
+ c[n] = '\0';
+ }
+ add(o, c);
+ }
+ add(o, ")");
+}
+
+static void pdf_string(void (*add)(object *, char const *),
+ object *o, char const *str)
+{
+ pdf_string_len(add, o, str, strlen(str));
}
~mdw / sgt / halibut / blobdiff