43341922 |
1 | /* |
2 | * PDF backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
9 | #define TREE_BRANCH 2 /* max branching factor in page tree */ |
10 | |
11 | paragraph *pdf_config_filename(char *filename) |
12 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("pdf-filename", filename, NULL); |
43341922 |
14 | } |
15 | |
16 | typedef struct object_Tag object; |
17 | typedef struct objlist_Tag objlist; |
18 | |
19 | struct object_Tag { |
20 | objlist *list; |
21 | object *next; |
22 | int number; |
23 | rdstringc main, stream; |
24 | int size, fileoff; |
25 | char *final; |
26 | }; |
27 | |
28 | struct objlist_Tag { |
29 | int number; |
30 | object *head, *tail; |
31 | }; |
32 | |
33 | static object *new_object(objlist *list); |
34 | static void objtext(object *o, char const *text); |
35 | static void objstream(object *o, char const *text); |
7c8c4239 |
36 | static void pdf_string(void (*add)(object *, char const *), |
37 | object *, char const *); |
ce1b04aa |
38 | static void pdf_string_len(void (*add)(object *, char const *), |
39 | object *, char const *, int); |
43341922 |
40 | static void objref(object *o, object *dest); |
993ade7a |
41 | static char *pdf_outline_convert(wchar_t *s, int *len); |
43341922 |
42 | |
3600720b |
43 | static int is_std_font(char const *name); |
44 | |
43341922 |
45 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
46 | page_data *last, object *resources, |
47 | object *mediabox); |
f0e51ce1 |
48 | static int make_outline(object *parent, outline_element *start, int n, |
49 | int open); |
09358aa7 |
50 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
51 | |
52 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
53 | indexdata *idx, void *vdoc) { |
54 | document *doc = (document *)vdoc; |
55 | int font_index; |
56 | font_encoding *fe; |
57 | page_data *page; |
58 | int pageno; |
59 | FILE *fp; |
60 | char *filename; |
61 | paragraph *p; |
62 | objlist olist; |
993ade7a |
63 | object *o, *info, *cat, *outlines, *pages, *resources, *mediabox; |
43341922 |
64 | int fileoff; |
65 | |
66 | IGNORE(keywords); |
67 | IGNORE(idx); |
68 | |
69 | filename = dupstr("output.pdf"); |
70 | for (p = sourceform; p; p = p->next) { |
7738a2fb |
71 | if (p->type == para_Config) { |
43341922 |
72 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
73 | sfree(filename); |
e4ea58f8 |
74 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
75 | } |
76 | } |
77 | } |
78 | |
79 | olist.head = olist.tail = NULL; |
80 | olist.number = 1; |
81 | |
993ade7a |
82 | { |
83 | char buf[256]; |
84 | |
85 | info = new_object(&olist); |
86 | objtext(info, "<<\n"); |
87 | if (doc->n_outline_elements > 0) { |
88 | char *title; |
89 | int titlelen; |
90 | |
91 | title = |
92 | pdf_outline_convert(doc->outline_elements->pdata->outline_title, |
93 | &titlelen); |
94 | objtext(info, "/Title "); |
95 | pdf_string_len(objtext, info, title, titlelen); |
96 | sfree(title); |
97 | objtext(info, "\n"); |
98 | } |
99 | objtext(info, "/Producer "); |
100 | sprintf(buf, "Halibut, %s", version); |
101 | pdf_string(objtext, info, buf); |
102 | objtext(info, "\n>>\n"); |
103 | } |
104 | |
43341922 |
105 | cat = new_object(&olist); |
a615a778 |
106 | if (doc->n_outline_elements > 0) |
107 | outlines = new_object(&olist); |
108 | else |
109 | outlines = NULL; |
43341922 |
110 | pages = new_object(&olist); |
111 | resources = new_object(&olist); |
112 | |
113 | /* |
43341922 |
114 | * The catalogue just contains references to the outlines and |
b7d31949 |
115 | * pages objects, and the pagelabels dictionary. |
43341922 |
116 | */ |
a615a778 |
117 | objtext(cat, "<<\n/Type /Catalog"); |
118 | if (outlines) { |
119 | objtext(cat, "\n/Outlines "); |
120 | objref(cat, outlines); |
121 | } |
43341922 |
122 | objtext(cat, "\n/Pages "); |
123 | objref(cat, pages); |
b7d31949 |
124 | /* Halibut just numbers pages 1, 2, 3, ... */ |
125 | objtext(cat, "\n/PageLabels<</Nums[0<</S/D>>]>>"); |
a615a778 |
126 | if (outlines) |
127 | objtext(cat, "\n/PageMode /UseOutlines"); |
128 | objtext(cat, "\n>>\n"); |
43341922 |
129 | |
130 | /* |
131 | * Set up the resources dictionary, which mostly means |
132 | * providing all the font objects and names to call them by. |
133 | */ |
134 | font_index = 0; |
135 | objtext(resources, "<<\n/Font <<\n"); |
136 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
137 | char fname[40]; |
b17a4ef3 |
138 | int i, prev; |
43341922 |
139 | object *font; |
140 | |
141 | sprintf(fname, "f%d", font_index++); |
142 | fe->name = dupstr(fname); |
143 | |
144 | font = new_object(&olist); |
145 | |
146 | objtext(resources, "/"); |
147 | objtext(resources, fe->name); |
148 | objtext(resources, " "); |
149 | objref(resources, font); |
150 | objtext(resources, "\n"); |
151 | |
152 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
153 | objtext(font, fe->name); |
154 | objtext(font, "\n/BaseFont /"); |
ba0fe3ec |
155 | objtext(font, fe->font->info->name); |
43341922 |
156 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
157 | |
158 | for (i = 0; i < 256; i++) { |
159 | char buf[20]; |
160 | if (!fe->vector[i]) |
161 | continue; |
b17a4ef3 |
162 | if (i != prev + 1) { |
163 | sprintf(buf, "\n%d", i); |
164 | objtext(font, buf); |
165 | } |
166 | objtext(font, i % 8 ? "/" : "\n/"); |
167 | objtext(font, fe->vector[i]); |
168 | prev = i; |
43341922 |
169 | } |
170 | |
171 | objtext(font, "\n]\n>>\n"); |
172 | |
255b7ff3 |
173 | #define FF_FIXEDPITCH 0x00000001 |
174 | #define FF_SERIF 0x00000002 |
175 | #define FF_SYMBOLIC 0x00000004 |
176 | #define FF_SCRIPT 0x00000008 |
177 | #define FF_NONSYMBOLIC 0x00000020 |
178 | #define FF_ITALIC 0x00000040 |
179 | #define FF_ALLCAP 0x00010000 |
180 | #define FF_SMALLCAP 0x00020000 |
181 | #define FF_FORCEBOLD 0x00040000 |
182 | |
3600720b |
183 | if (!is_std_font(fe->font->info->name)){ |
43341922 |
184 | object *widths = new_object(&olist); |
255b7ff3 |
185 | object *fontdesc = new_object(&olist); |
9fb062fc |
186 | int firstchar = -1, lastchar = -1; |
187 | char buf[80]; |
255b7ff3 |
188 | font_info const *fi = fe->font->info; |
189 | int flags; |
9fb062fc |
190 | for (i = 0; i < 256; i++) |
191 | if (fe->indices[i] >= 0) { |
192 | if (firstchar < 0) firstchar = i; |
193 | lastchar = i; |
194 | } |
195 | sprintf(buf, "/FirstChar %d\n/LastChar %d\n/Widths ", |
196 | firstchar, lastchar); |
197 | objtext(font, buf); |
43341922 |
198 | objref(font, widths); |
199 | objtext(font, "\n"); |
200 | objtext(widths, "[\n"); |
9fb062fc |
201 | for (i = firstchar; i <= lastchar; i++) { |
43341922 |
202 | double width; |
203 | if (fe->indices[i] < 0) |
204 | width = 0.0; |
205 | else |
255b7ff3 |
206 | width = fi->widths[fe->indices[i]]; |
17c71b41 |
207 | sprintf(buf, "%g\n", 1000.0 * width / FUNITS_PER_PT); |
43341922 |
208 | objtext(widths, buf); |
209 | } |
210 | objtext(widths, "]\n"); |
255b7ff3 |
211 | objtext(font, "/FontDescriptor "); |
212 | objref(font, fontdesc); |
213 | objtext(fontdesc, "<<\n/Type /FontDescriptor\n/Name /"); |
214 | objtext(fontdesc, fi->name); |
215 | flags = 0; |
216 | if (fi->italicangle) flags |= FF_ITALIC; |
217 | flags |= FF_NONSYMBOLIC; |
218 | sprintf(buf, "\n/Flags %d\n", flags); |
219 | objtext(fontdesc, buf); |
220 | sprintf(buf, "/FontBBox [%g %g %g %g]\n", fi->fontbbox[0], |
221 | fi->fontbbox[1], fi->fontbbox[2], fi->fontbbox[3]); |
222 | objtext(fontdesc, buf); |
223 | sprintf(buf, "/ItalicAngle %g\n", fi->italicangle); |
224 | objtext(fontdesc, buf); |
225 | sprintf(buf, "/Ascent %g\n", fi->ascent); |
226 | objtext(fontdesc, buf); |
227 | sprintf(buf, "/Descent %g\n", fi->descent); |
228 | objtext(fontdesc, buf); |
229 | sprintf(buf, "/CapHeight %g\n", fi->capheight); |
230 | objtext(fontdesc, buf); |
231 | sprintf(buf, "/XHeight %g\n", fi->xheight); |
232 | objtext(fontdesc, buf); |
233 | sprintf(buf, "/StemH %g\n", fi->stemh); |
234 | objtext(fontdesc, buf); |
235 | sprintf(buf, "/StemV %g\n", fi->stemv); |
236 | objtext(fontdesc, buf); |
44407fea |
237 | if (fi->fp) { |
238 | object *fontfile = new_object(&olist); |
239 | char buf[513]; |
240 | size_t len; |
241 | rewind(fi->fp); |
242 | do { |
243 | len = fread(buf, 1, sizeof(buf)-1, fi->fp); |
244 | buf[len] = 0; |
245 | objstream(fontfile, buf); |
246 | } while (len == sizeof(buf)-1); |
247 | objtext(fontdesc, "/FontFile "); |
248 | objref(fontdesc, fontfile); |
249 | } |
250 | objtext(fontdesc, "\n>>\n"); |
43341922 |
251 | } |
252 | |
255b7ff3 |
253 | objtext(font, "\n>>\n"); |
43341922 |
254 | } |
255 | objtext(resources, ">>\n>>\n"); |
256 | |
2ff8419e |
257 | { |
258 | char buf[255]; |
259 | mediabox = new_object(&olist); |
260 | sprintf(buf, "[0 0 %g %g]\n", |
261 | doc->paper_width / FUNITS_PER_PT, |
262 | doc->paper_height / FUNITS_PER_PT); |
263 | objtext(mediabox, buf); |
264 | } |
265 | |
43341922 |
266 | /* |
267 | * Define the page objects for each page, and get each one |
268 | * ready to have a `Parent' specification added to it. |
269 | */ |
270 | for (page = doc->pages; page; page = page->next) { |
271 | object *opage; |
272 | |
273 | opage = new_object(&olist); |
274 | page->spare = opage; |
275 | objtext(opage, "<<\n/Type /Page\n"); |
276 | } |
277 | |
278 | /* |
279 | * Recursively build the page tree. |
280 | */ |
2ff8419e |
281 | make_pages_node(pages, NULL, doc->pages, NULL, resources, mediabox); |
43341922 |
282 | |
283 | /* |
284 | * Create and render the individual pages. |
285 | */ |
286 | pageno = 0; |
287 | for (page = doc->pages; page; page = page->next) { |
288 | object *opage, *cstr; |
23765aeb |
289 | rect *r; |
7c8c4239 |
290 | text_fragment *frag, *frag_end; |
43341922 |
291 | char buf[256]; |
7c8c4239 |
292 | int x, y, lx, ly; |
43341922 |
293 | |
294 | opage = (object *)page->spare; |
295 | /* |
296 | * At this point the page dictionary is already |
297 | * half-written, with /Type and /Parent already present. We |
298 | * continue from there. |
299 | */ |
300 | |
301 | /* |
302 | * The PDF spec says /Resources is required, but also says |
303 | * that it's inheritable and may be omitted if it's present |
304 | * in a Pages node. In our case it is: it's present in the |
305 | * topmost /Pages node because we carefully put it there. |
2ff8419e |
306 | * So we don't need a /Resources entry here. The same applies |
307 | * to /MediaBox. |
43341922 |
308 | */ |
43341922 |
309 | |
310 | /* |
311 | * Now we're ready to define a content stream containing |
312 | * the actual text on the page. |
313 | */ |
314 | cstr = new_object(&olist); |
315 | objtext(opage, "/Contents "); |
316 | objref(opage, cstr); |
317 | objtext(opage, "\n"); |
318 | |
23765aeb |
319 | /* |
320 | * Render any rectangles on the page. |
321 | */ |
322 | for (r = page->first_rect; r; r = r->next) { |
323 | char buf[512]; |
17c71b41 |
324 | sprintf(buf, "%g %g %g %g re f\n", |
325 | r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT, |
326 | r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT); |
23765aeb |
327 | objstream(cstr, buf); |
328 | } |
329 | |
43341922 |
330 | objstream(cstr, "BT\n"); |
43341922 |
331 | |
7c8c4239 |
332 | /* |
333 | * PDF tracks two separate current positions: the position |
334 | * given in the `line matrix' and the position given in the |
335 | * `text matrix'. We must therefore track both as well. |
336 | * They start off at -1 (unset). |
337 | */ |
338 | lx = ly = -1; |
339 | x = y = -1; |
340 | |
341 | frag = page->first_text; |
342 | while (frag) { |
343 | /* |
344 | * For compactness, I'm going to group text fragments |
345 | * into subsequences that use the same font+size. So |
346 | * first find the end of this subsequence. |
347 | */ |
348 | for (frag_end = frag; |
349 | (frag_end && |
350 | frag_end->fe == frag->fe && |
351 | frag_end->fontsize == frag->fontsize); |
352 | frag_end = frag_end->next); |
353 | |
354 | /* |
355 | * Now select the text fragment, and prepare to display |
356 | * the text. |
357 | */ |
43341922 |
358 | objstream(cstr, "/"); |
359 | objstream(cstr, frag->fe->name); |
7c8c4239 |
360 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
361 | objstream(cstr, buf); |
362 | |
7c8c4239 |
363 | while (frag && frag != frag_end) { |
364 | /* |
365 | * Place the text position for the first piece of |
366 | * text. |
367 | */ |
368 | if (lx < 0) { |
369 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
17c71b41 |
370 | frag->x/FUNITS_PER_PT, frag->y/FUNITS_PER_PT); |
7c8c4239 |
371 | } else { |
372 | sprintf(buf, "%g %g Td ", |
17c71b41 |
373 | (frag->x - lx)/FUNITS_PER_PT, |
374 | (frag->y - ly)/FUNITS_PER_PT); |
7c8c4239 |
375 | } |
43341922 |
376 | objstream(cstr, buf); |
7c8c4239 |
377 | lx = x = frag->x; |
378 | ly = y = frag->y; |
379 | |
380 | /* |
381 | * See if we're going to use Tj (show a single |
382 | * string) or TJ (show an array of strings with |
383 | * x-spacings between them). We determine this by |
384 | * seeing if there's more than one text fragment in |
385 | * sequence with the same y-coordinate. |
386 | */ |
387 | if (frag->next && frag->next != frag_end && |
388 | frag->next->y == y) { |
389 | /* |
390 | * The TJ strategy. |
391 | */ |
392 | objstream(cstr, "["); |
393 | while (frag && frag != frag_end && frag->y == y) { |
394 | if (frag->x != x) { |
395 | sprintf(buf, "%g", |
396 | (x - frag->x) * 1000.0 / |
17c71b41 |
397 | (FUNITS_PER_PT * frag->fontsize)); |
7c8c4239 |
398 | objstream(cstr, buf); |
399 | } |
400 | pdf_string(objstream, cstr, frag->text); |
401 | x = frag->x + frag->width; |
402 | frag = frag->next; |
403 | } |
404 | objstream(cstr, "]TJ\n"); |
405 | } else |
406 | { |
407 | /* |
408 | * The Tj strategy. |
409 | */ |
410 | pdf_string(objstream, cstr, frag->text); |
411 | objstream(cstr, "Tj\n"); |
412 | frag = frag->next; |
413 | } |
43341922 |
414 | } |
43341922 |
415 | } |
416 | objstream(cstr, "ET"); |
417 | |
138d7ffb |
418 | /* |
419 | * Also, we want an annotation dictionary containing the |
420 | * cross-references from this page. |
421 | */ |
422 | if (page->first_xref) { |
423 | xref *xr; |
424 | objtext(opage, "/Annots [\n"); |
425 | |
426 | for (xr = page->first_xref; xr; xr = xr->next) { |
138d7ffb |
427 | char buf[256]; |
428 | |
6e4d0fd8 |
429 | objtext(opage, "<</Subtype/Link\n/Rect["); |
138d7ffb |
430 | sprintf(buf, "%g %g %g %g", |
17c71b41 |
431 | xr->lx / FUNITS_PER_PT, xr->by / FUNITS_PER_PT, |
432 | xr->rx / FUNITS_PER_PT, xr->ty / FUNITS_PER_PT); |
6e4d0fd8 |
433 | objtext(opage, buf); |
434 | objtext(opage, "]/Border[0 0 0]\n"); |
138d7ffb |
435 | |
436 | if (xr->dest.type == PAGE) { |
6e4d0fd8 |
437 | objtext(opage, "/Dest["); |
438 | objref(opage, (object *)xr->dest.page->spare); |
439 | objtext(opage, "/XYZ null null null]"); |
138d7ffb |
440 | } else { |
6e4d0fd8 |
441 | objtext(opage, "/A<</S/URI/URI"); |
442 | pdf_string(objtext, opage, xr->dest.url); |
443 | objtext(opage, ">>"); |
138d7ffb |
444 | } |
445 | |
6e4d0fd8 |
446 | objtext(opage, ">>\n"); |
138d7ffb |
447 | } |
448 | |
449 | objtext(opage, "]\n"); |
450 | } |
451 | |
43341922 |
452 | objtext(opage, ">>\n"); |
453 | } |
454 | |
455 | /* |
f0e51ce1 |
456 | * Set up the outlines dictionary. |
457 | */ |
a615a778 |
458 | if (outlines) { |
f0e51ce1 |
459 | int topcount; |
460 | char buf[80]; |
461 | |
462 | objtext(outlines, "<<\n/Type /Outlines\n"); |
463 | topcount = make_outline(outlines, doc->outline_elements, |
464 | doc->n_outline_elements, TRUE); |
465 | sprintf(buf, "/Count %d\n>>\n", topcount); |
466 | objtext(outlines, buf); |
467 | } |
468 | |
469 | /* |
43341922 |
470 | * Assemble the final linear form of every object. |
471 | */ |
472 | for (o = olist.head; o; o = o->next) { |
473 | rdstringc rs = {0, 0, NULL}; |
474 | char text[80]; |
475 | |
476 | sprintf(text, "%d 0 obj\n", o->number); |
477 | rdaddsc(&rs, text); |
478 | |
479 | if (!o->main.text && o->stream.text) { |
480 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
481 | rdaddsc(&o->main, text); |
482 | } |
483 | |
484 | assert(o->main.text); |
485 | rdaddsc(&rs, o->main.text); |
486 | sfree(o->main.text); |
487 | |
488 | if (rs.text[rs.pos-1] != '\n') |
489 | rdaddc(&rs, '\n'); |
490 | |
491 | if (o->stream.text) { |
492 | /* |
493 | * FIXME: If we ever start compressing stream data then |
494 | * it will have zero bytes in it, so we'll have to be |
495 | * more careful than this. |
496 | */ |
497 | rdaddsc(&rs, "stream\n"); |
498 | rdaddsc(&rs, o->stream.text); |
499 | rdaddsc(&rs, "\nendstream\n"); |
500 | sfree(o->stream.text); |
501 | } |
502 | |
503 | rdaddsc(&rs, "endobj\n"); |
504 | |
505 | o->final = rs.text; |
506 | o->size = rs.pos; |
507 | } |
508 | |
509 | /* |
510 | * Write out the PDF file. |
511 | */ |
512 | |
513 | fp = fopen(filename, "wb"); |
514 | if (!fp) { |
515 | error(err_cantopenw, filename); |
516 | return; |
517 | } |
518 | |
519 | /* |
09358aa7 |
520 | * Header. I'm going to put the version IDs in the header as |
521 | * well, simply in PDF comments. |
43341922 |
522 | */ |
523 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
524 | for (p = sourceform; p; p = p->next) |
525 | if (p->type == para_VersionID) |
526 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
527 | |
528 | /* |
529 | * Body |
530 | */ |
531 | for (o = olist.head; o; o = o->next) { |
532 | o->fileoff = fileoff; |
533 | fwrite(o->final, 1, o->size, fp); |
534 | fileoff += o->size; |
535 | } |
536 | |
537 | /* |
538 | * Cross-reference table |
539 | */ |
540 | fprintf(fp, "xref\n"); |
541 | assert(olist.head->number == 1); |
542 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
543 | fprintf(fp, "0000000000 65535 f \n"); |
544 | for (o = olist.head; o; o = o->next) { |
545 | char entry[40]; |
546 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
547 | assert(strlen(entry) == 20); |
548 | fputs(entry, fp); |
549 | } |
550 | |
551 | /* |
552 | * Trailer |
553 | */ |
993ade7a |
554 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n/Info %d 0 R\n>>\n", |
555 | olist.tail->number + 1, cat->number, info->number); |
43341922 |
556 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
557 | |
558 | fclose(fp); |
559 | |
560 | sfree(filename); |
561 | } |
562 | |
563 | static object *new_object(objlist *list) |
564 | { |
f1530049 |
565 | object *obj = snew(object); |
43341922 |
566 | |
567 | obj->list = list; |
568 | |
569 | obj->main.text = NULL; |
570 | obj->main.pos = obj->main.size = 0; |
571 | obj->stream.text = NULL; |
572 | obj->stream.pos = obj->stream.size = 0; |
573 | |
574 | obj->number = list->number++; |
575 | |
576 | obj->next = NULL; |
577 | if (list->tail) |
578 | list->tail->next = obj; |
579 | else |
580 | list->head = obj; |
581 | list->tail = obj; |
582 | |
583 | obj->size = 0; |
584 | obj->final = NULL; |
585 | |
586 | return obj; |
587 | } |
588 | |
589 | static void objtext(object *o, char const *text) |
590 | { |
591 | rdaddsc(&o->main, text); |
592 | } |
593 | |
594 | static void objstream(object *o, char const *text) |
595 | { |
596 | rdaddsc(&o->stream, text); |
597 | } |
598 | |
599 | static void objref(object *o, object *dest) |
600 | { |
601 | char buf[40]; |
602 | sprintf(buf, "%d 0 R", dest->number); |
603 | rdaddsc(&o->main, buf); |
604 | } |
605 | |
3600720b |
606 | static char const * const stdfonts[] = { |
607 | "Times-Roman", "Times-Bold", "Times-Italic", "Times-BoldItalic", |
608 | "Helvetica", "Helvetica-Bold", "Helvetica-Oblique","Helvetica-BoldOblique", |
609 | "Courier", "Courier-Bold", "Courier-Oblique", "Courier-BoldOblique", |
610 | "Symbol", "ZapfDingbats" |
611 | }; |
612 | |
613 | static int is_std_font(char const *name) { |
614 | unsigned i; |
615 | for (i = 0; i < lenof(stdfonts); i++) |
616 | if (strcmp(name, stdfonts[i]) == 0) |
617 | return TRUE; |
618 | return FALSE; |
619 | } |
620 | |
43341922 |
621 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
622 | page_data *last, object *resources, |
623 | object *mediabox) |
43341922 |
624 | { |
625 | int count; |
626 | page_data *page; |
627 | char buf[80]; |
628 | |
629 | objtext(node, "<<\n/Type /Pages\n"); |
630 | if (parent) { |
631 | objtext(node, "/Parent "); |
632 | objref(node, parent); |
633 | objtext(node, "\n"); |
634 | } |
635 | |
636 | /* |
637 | * Count the pages in this stretch, to see if there are few |
638 | * enough to reference directly. |
639 | */ |
640 | count = 0; |
641 | for (page = first; page; page = page->next) { |
642 | count++; |
643 | if (page == last) |
644 | break; |
645 | } |
646 | |
647 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
648 | objtext(node, buf); |
649 | |
650 | if (count > TREE_BRANCH) { |
651 | int i; |
652 | page_data *thisfirst, *thislast; |
653 | |
654 | page = first; |
655 | |
656 | for (i = 0; i < TREE_BRANCH; i++) { |
657 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
658 | thisfirst = page; |
659 | while (number--) { |
660 | thislast = page; |
661 | page = page->next; |
662 | } |
663 | |
664 | if (thisfirst == thislast) { |
665 | objref(node, (object *)thisfirst->spare); |
666 | objtext((object *)thisfirst->spare, "/Parent "); |
667 | objref((object *)thisfirst->spare, node); |
668 | objtext((object *)thisfirst->spare, "\n"); |
669 | } else { |
670 | object *newnode = new_object(node->list); |
2ff8419e |
671 | make_pages_node(newnode, node, thisfirst, thislast, |
672 | NULL, NULL); |
43341922 |
673 | objref(node, newnode); |
674 | } |
675 | objtext(node, "\n"); |
676 | } |
677 | |
678 | assert(thislast == last || page == NULL); |
679 | |
680 | } else { |
681 | for (page = first; page; page = page->next) { |
682 | objref(node, (object *)page->spare); |
683 | objtext(node, "\n"); |
684 | objtext((object *)page->spare, "/Parent "); |
685 | objref((object *)page->spare, node); |
686 | objtext((object *)page->spare, "\n"); |
687 | if (page == last) |
688 | break; |
689 | } |
690 | } |
691 | |
692 | objtext(node, "]\n"); |
693 | |
694 | if (resources) { |
695 | objtext(node, "/Resources "); |
696 | objref(node, resources); |
697 | objtext(node, "\n"); |
698 | } |
2ff8419e |
699 | if (mediabox) { |
700 | objtext(node, "/MediaBox "); |
701 | objref(node, mediabox); |
702 | objtext(node, "\n"); |
703 | } |
43341922 |
704 | |
705 | objtext(node, ">>\n"); |
706 | } |
f0e51ce1 |
707 | |
708 | /* |
709 | * In text on the page, PDF uses the PostScript font model, which |
710 | * means that glyphs are identified by PS strings and hence font |
711 | * encoding can be managed independently of the supplied encoding |
712 | * of the font. However, in the document outline, the PDF spec |
ce1b04aa |
713 | * encodes in either PDFDocEncoding (a custom superset of |
714 | * ISO-8859-1) or UTF-16BE. |
f0e51ce1 |
715 | */ |
ce1b04aa |
716 | static char *pdf_outline_convert(wchar_t *s, int *len) { |
717 | char *ret; |
718 | |
719 | ret = utoa_careful_dup(s, CS_PDF); |
720 | |
721 | /* |
722 | * Very silly special case: if the returned string begins with |
723 | * FE FF, then the PDF reader will mistake it for a UTF-16BE |
724 | * string. So in this case we give up on PDFDocEncoding and |
725 | * encode it in UTF-16 straight away. |
726 | */ |
727 | if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') { |
728 | sfree(ret); |
729 | ret = NULL; |
f0e51ce1 |
730 | } |
ce1b04aa |
731 | |
732 | if (!ret) { |
733 | ret = utoa_dup_len(s, CS_UTF16BE, len); |
734 | } else { |
735 | *len = strlen(ret); |
f0e51ce1 |
736 | } |
ce1b04aa |
737 | |
738 | return ret; |
f0e51ce1 |
739 | } |
740 | |
f0e51ce1 |
741 | static int make_outline(object *parent, outline_element *items, int n, |
742 | int open) |
743 | { |
744 | int level, totalcount = 0; |
745 | outline_element *itemp; |
746 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
747 | |
748 | assert(n > 0); |
749 | |
750 | level = items->level; |
751 | |
752 | while (n > 0) { |
7c8c4239 |
753 | char *title; |
ce1b04aa |
754 | int titlelen; |
f0e51ce1 |
755 | |
756 | /* |
757 | * Here we expect to be sitting on an item at the given |
758 | * level. So we start by constructing an outline entry for |
759 | * that item. |
760 | */ |
761 | assert(items->level == level); |
762 | |
ce1b04aa |
763 | title = pdf_outline_convert(items->pdata->outline_title, &titlelen); |
f0e51ce1 |
764 | |
765 | totalcount++; |
766 | curr = new_object(parent->list); |
767 | if (!first) first = curr; |
768 | last = curr; |
7c8c4239 |
769 | objtext(curr, "<<\n/Title "); |
ce1b04aa |
770 | pdf_string_len(objtext, curr, title, titlelen); |
993ade7a |
771 | sfree(title); |
7c8c4239 |
772 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
773 | objref(curr, parent); |
774 | objtext(curr, "\n/Dest ["); |
be76d597 |
775 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
776 | objtext(curr, " /XYZ null null null]\n"); |
777 | if (prev) { |
778 | objtext(curr, "/Prev "); |
779 | objref(curr, prev); |
780 | objtext(curr, "\n"); |
781 | |
782 | objtext(prev, "/Next "); |
783 | objref(prev, curr); |
784 | objtext(prev, "\n>>\n"); |
785 | } |
786 | prev = curr; |
787 | |
788 | items++, n--; |
789 | for (itemp = items; itemp < items+n && itemp->level > level; |
790 | itemp++); |
791 | |
792 | if (itemp > items) { |
793 | char buf[80]; |
794 | int count = make_outline(curr, items, itemp - items, FALSE); |
795 | if (!open) |
796 | count = -count; |
797 | else |
798 | totalcount += count; |
799 | sprintf(buf, "/Count %d\n", count); |
800 | objtext(curr, buf); |
801 | } |
802 | |
803 | n -= itemp - items; |
804 | items = itemp; |
805 | } |
806 | objtext(prev, ">>\n"); |
807 | |
808 | assert(first && last); |
809 | objtext(parent, "/First "); |
810 | objref(parent, first); |
811 | objtext(parent, "\n/Last "); |
812 | objref(parent, last); |
813 | objtext(parent, "\n"); |
814 | |
815 | return totalcount; |
816 | } |
09358aa7 |
817 | |
818 | static int pdf_versionid(FILE *fp, word *words) |
819 | { |
820 | int ret; |
821 | |
822 | ret = fprintf(fp, "%% "); |
823 | |
824 | for (; words; words = words->next) { |
825 | char *text; |
826 | int type; |
827 | |
828 | switch (words->type) { |
829 | case word_HyperLink: |
830 | case word_HyperEnd: |
831 | case word_UpperXref: |
832 | case word_LowerXref: |
833 | case word_XrefEnd: |
834 | case word_IndexRef: |
835 | continue; |
836 | } |
837 | |
838 | type = removeattr(words->type); |
839 | |
840 | switch (type) { |
841 | case word_Normal: |
e4ea58f8 |
842 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
843 | break; |
844 | case word_WhiteSpace: |
845 | text = dupstr(" "); |
846 | break; |
847 | case word_Quote: |
848 | text = dupstr("'"); |
849 | break; |
850 | } |
851 | |
852 | fputs(text, fp); |
853 | ret += strlen(text); |
854 | sfree(text); |
855 | } |
856 | |
857 | ret += fprintf(fp, "\n"); |
858 | |
859 | return ret; |
860 | } |
7c8c4239 |
861 | |
ce1b04aa |
862 | static void pdf_string_len(void (*add)(object *, char const *), |
863 | object *o, char const *str, int len) |
7c8c4239 |
864 | { |
865 | char const *p; |
866 | |
867 | add(o, "("); |
ce1b04aa |
868 | for (p = str; len > 0; p++, len--) { |
869 | char c[10]; |
870 | if (*p < ' ' || *p > '~') { |
871 | sprintf(c, "\\%03o", 0xFF & (int)*p); |
872 | } else { |
873 | int n = 0; |
874 | if (*p == '\\' || *p == '(' || *p == ')') |
875 | c[n++] = '\\'; |
876 | c[n++] = *p; |
877 | c[n] = '\0'; |
878 | } |
7c8c4239 |
879 | add(o, c); |
880 | } |
881 | add(o, ")"); |
882 | } |
ce1b04aa |
883 | |
884 | static void pdf_string(void (*add)(object *, char const *), |
885 | object *o, char const *str) |
886 | { |
887 | pdf_string_len(add, o, str, strlen(str)); |
888 | } |