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Handle non utf8 paths on OCaml side too
[llpp.git] / link.c
blob86e715648d3e4ae513b9e95e6a027ac0d934cccc
1 /* lots of code c&p-ed directly from mupdf */
2 #include <errno.h>
3 #include <stdio.h>
4 #include <ctype.h>
5 #include <string.h>
6 #include <stdlib.h>
7 #include <signal.h>
8 #include <wchar.h>
9
10 #include <unistd.h>
11 #include <pthread.h>
12 #include <sys/time.h>
13 #include <sys/types.h>
14 #include <sys/ioctl.h>
15
16 #ifdef __CYGWIN__
17 #include <cygwin/socket.h> /* FIONREAD */
18 #else
19 #include <spawn.h>
20 #endif
21
22 #include <regex.h>
23 #include <ctype.h>
24 #include <stdarg.h>
25 #include <limits.h>
26
27 #include <GL/gl.h>
28
29 #include <caml/fail.h>
30 #include <caml/alloc.h>
31 #include <caml/memory.h>
32 #include <caml/unixsupport.h>
33
34 #include <fitz.h>
35 #include <mupdf.h>
36 #include <mupdf-internal.h>
37 #include <muxps.h>
38 #include <muxps-internal.h>
39 #include <mucbz.h>
40
41 #include FT_FREETYPE_H
42
43 #define PIGGYBACK
44
45 #ifndef __USE_GNU
46 extern char **environ;
47 #endif
48
49 #define MIN(a,b) ((a) < (b) ? (a) : (b))
50 #define MAX(a,b) ((a) > (b) ? (a) : (b))
51
52 #if defined __GNUC__
53 #define NORETURN_ATTR __attribute__ ((noreturn))
54 #define UNUSED_ATTR __attribute__ ((unused))
55 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
56 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
57 #else
58 #define NORETURN_ATTR
59 #define UNUSED_ATTR
60 #define OPTIMIZE_ATTR(n)
61 #define GCC_FMT_ATTR(a, b)
62 #endif
63
64 #define FMT_s "zu"
65
66 #define FMT_ptr "p"
67 #define FMT_ptr_cast(p) (p)
68 #define FMT_ptr_cast2(p) (p)
69
70 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
71 err (int exitcode, const char *fmt, ...)
72 {
73 va_list ap;
74 int savederrno;
75
76 savederrno = errno;
77 va_start (ap, fmt);
78 vfprintf (stderr, fmt, ap);
79 va_end (ap);
80 fprintf (stderr, ": %s\n", strerror (savederrno));
81 fflush (stderr);
82 _exit (exitcode);
83 }
84
85 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
86 errx (int exitcode, const char *fmt, ...)
87 {
88 va_list ap;
89
90 va_start (ap, fmt);
91 vfprintf (stderr, fmt, ap);
92 va_end (ap);
93 fputc ('\n', stderr);
94 fflush (stderr);
95 _exit (exitcode);
96 }
97
98 #ifndef GL_TEXTURE_RECTANGLE_ARB
99 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
100 #endif
101
102 #ifndef GL_BGRA
103 #define GL_BGRA 0x80E1
104 #endif
105
106 #ifndef GL_UNSIGNED_INT_8_8_8_8
107 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
108 #endif
109
110 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
111 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
112 #endif
113
114 #if 0
115 #define lprintf printf
116 #else
117 #define lprintf(...)
118 #endif
119
120 #define ARSERT(cond) for (;;) { \
121 if (!(cond)) { \
122 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
123 } \
124 break; \
125 }
126
127 struct slice {
128 int h;
129 int texindex;
130 };
131
132 struct tile {
133 int x, y, w, h;
134 int slicecount;
135 int sliceheight;
136 fz_pixmap *pixmap;
137 struct slice slices[1];
138 };
139
140 struct pagedim {
141 int pageno;
142 int rotate;
143 int left;
144 int tctmready;
145 fz_bbox bounds;
146 fz_rect pagebox;
147 fz_rect mediabox;
148 fz_matrix ctm, zoomctm, lctm, tctm;
149 };
150
151 struct slink {
152 fz_bbox bbox;
153 fz_link *link;
154 };
155
156 enum { DPDF, DXPS, DCBZ };
157
158 struct page {
159 int tgen;
160 int sgen;
161 int type;
162 int pageno;
163 int pdimno;
164 fz_text_page *text;
165 fz_text_sheet *sheet;
166 union {
167 void *ptr;
168 pdf_page *pdfpage;
169 xps_page *xpspage;
170 cbz_page *cbzpage;
171 } u;
172 fz_display_list *dlist;
173 int slinkcount;
174 struct slink *slinks;
175 struct mark {
176 int i;
177 fz_text_span *span;
178 } fmark, lmark;
179 void (*freepage) (void *);
180 };
181
182 struct {
183 int type;
184 int sliceheight;
185 struct pagedim *pagedims;
186 int pagecount;
187 int pagedimcount;
188 union {
189 pdf_document *pdf;
190 xps_document *xps;
191 cbz_document *cbz;
192 } u;
193 fz_context *ctx;
194 int w, h;
195
196 int texindex;
197 int texcount;
198 GLuint *texids;
199
200 GLenum texiform;
201 GLenum texform;
202 GLenum texty;
203
204 fz_colorspace *colorspace;
205
206 struct {
207 int w, h;
208 struct slice *slice;
209 } *texowners;
210
211 int rotate;
212 int proportional;
213 int trimmargins;
214 int needoutline;
215 int gen;
216 int aalevel;
217
218 int trimanew;
219 fz_bbox trimfuzz;
220 fz_pixmap *pig;
221
222 pthread_t thread;
223 int cr, cw;
224 FT_Face face;
225
226 void (*closedoc) (void);
227 void (*freepage) (void *);
228
229 char *trimcachepath;
230 } state;
231
232 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
233 {
234 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
235 }
236
237 static void UNUSED_ATTR debug_bbox (const char *cap, fz_bbox r)
238 {
239 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
240 }
241
242 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
243 {
244 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
245 m.a, m.b, m.c, m.d, m.e, m.f);
246 }
247
248 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
249
250 static void lock (const char *cap)
251 {
252 int ret = pthread_mutex_lock (&mutex);
253 if (ret) {
254 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
255 }
256 }
257
258 static void unlock (const char *cap)
259 {
260 int ret = pthread_mutex_unlock (&mutex);
261 if (ret) {
262 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
263 }
264 }
265
266 static int trylock (const char *cap)
267 {
268 int ret = pthread_mutex_trylock (&mutex);
269 if (ret && ret != EBUSY) {
270 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
271 }
272 return ret == EBUSY;
273 }
274
275 static void *parse_pointer (const char *cap, const char *s)
276 {
277 int ret;
278 void *ptr;
279
280 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
281 if (ret != 1) {
282 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
283 }
284 return ptr;
285 }
286
287 static double now (void)
288 {
289 struct timeval tv;
290
291 if (gettimeofday (&tv, NULL)) {
292 err (1, "gettimeofday");
293 }
294 return tv.tv_sec + tv.tv_usec*1e-6;
295 }
296
297 static int hasdata (void)
298 {
299 int ret, avail;
300 ret = ioctl (state.cr, FIONREAD, &avail);
301 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
302 return avail > 0;
303 }
304
305 CAMLprim value ml_hasdata (value fd_v)
306 {
307 CAMLparam1 (fd_v);
308 int ret, avail;
309
310 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
311 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
312 CAMLreturn (Val_bool (avail > 0));
313 }
314
315 static void readdata (void *p, int size)
316 {
317 ssize_t n;
318
319 again:
320 n = read (state.cr, p, size);
321 if (n < 0) {
322 if (errno == EINTR) goto again;
323 err (1, "read (req %d, ret %zd)", size, n);
324 }
325 if (n - size) {
326 if (!n) errx (1, "EOF while reading");
327 errx (1, "read (req %d, ret %zd)", size, n);
328 }
329 }
330
331 static void writedata (char *p, int size)
332 {
333 char buf[4];
334 ssize_t n;
335
336 buf[0] = (size >> 24) & 0xff;
337 buf[1] = (size >> 16) & 0xff;
338 buf[2] = (size >> 8) & 0xff;
339 buf[3] = (size >> 0) & 0xff;
340
341 n = write (state.cw, buf, 4);
342 if (n != 4) {
343 if (!n) errx (1, "EOF while writing length");
344 err (1, "write %zd", n);
345 }
346
347 n = write (state.cw, p, size);
348 if (n - size) {
349 if (!n) errx (1, "EOF while writing data");
350 err (1, "write (req %d, ret %zd)", size, n);
351 }
352 }
353
354 static int readlen (void)
355 {
356 unsigned char p[4];
357
358 readdata (p, 4);
359 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
360 }
361
362 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
363 {
364 int size = 200, len;
365 va_list ap;
366 char *buf;
367
368 buf = malloc (size);
369 for (;;) {
370 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
371
372 va_start (ap, fmt);
373 len = vsnprintf (buf, size, fmt, ap);
374 va_end (ap);
375
376 if (len > -1 && len < size) {
377 writedata (buf, len);
378 break;
379 }
380
381 if (len > -1) {
382 size = len + 1;
383 }
384 else {
385 size *= 2;
386 }
387 buf = realloc (buf, size);
388 }
389 free (buf);
390 }
391
392 static void closepdf (void)
393 {
394 if (state.u.pdf) {
395 pdf_close_document (state.u.pdf);
396 state.u.pdf = NULL;
397 }
398 }
399
400 static void closexps (void)
401 {
402 if (state.u.xps) {
403 xps_close_document (state.u.xps);
404 state.u.xps = NULL;
405 }
406 }
407
408 static void closecbz (void)
409 {
410 if (state.u.cbz) {
411 cbz_close_document (state.u.cbz);
412 state.u.cbz = NULL;
413 }
414 }
415
416 static void freepdfpage (void *ptr)
417 {
418 pdf_free_page (state.u.pdf, ptr);
419 }
420
421 static void freeemptypdfpage (void *ptr)
422 {
423 (void) ptr;
424 }
425
426 static void freexpspage (void *ptr)
427 {
428 xps_free_page (state.u.xps, ptr);
429 }
430
431 static void freecbzpage (void *ptr)
432 {
433 cbz_free_page (state.u.cbz, ptr);
434 }
435
436 static void openxref (char *filename, char *password)
437 {
438 int i, len;
439
440 for (i = 0; i < state.texcount; ++i) {
441 state.texowners[i].w = -1;
442 state.texowners[i].slice = NULL;
443 }
444
445 if (state.closedoc) state.closedoc ();
446
447 len = strlen (filename);
448
449 state.type = DPDF;
450 if (len > 4) {
451 char ext[4];
452
453 ext[0] = tolower ((int) filename[len-3]);
454 ext[1] = tolower ((int) filename[len-2]);
455 ext[2] = tolower ((int) filename[len-1]);
456
457 /**/ if (ext[0] == 'x' && ext[1] == 'p' && ext[2] == 's') {
458 state.type = DXPS;
459 }
460 else if (ext[0] == 'c' && ext[1] == 'b' && ext[2] == 'z') {
461 state.type = DCBZ;
462 }
463 }
464
465 if (state.pagedims) {
466 free (state.pagedims);
467 state.pagedims = NULL;
468 }
469 state.pagedimcount = 0;
470
471 fz_set_aa_level (state.ctx, state.aalevel);
472 switch (state.type) {
473 case DPDF:
474 state.u.pdf = pdf_open_document (state.ctx, filename);
475 if (pdf_needs_password (state.u.pdf)) {
476 int okay = pdf_authenticate_password (state.u.pdf, password);
477 if (!okay) {
478 errx (1, "invalid password");
479 }
480 }
481 state.pagecount = pdf_count_pages (state.u.pdf);
482 state.closedoc = closepdf;
483 state.freepage = freepdfpage;
484 break;
485
486 case DXPS:
487 state.u.xps = xps_open_document (state.ctx, filename);
488 state.pagecount = xps_count_pages (state.u.xps);
489 state.closedoc = closexps;
490 state.freepage = freexpspage;
491 break;
492
493 case DCBZ:
494 state.u.cbz = cbz_open_document (state.ctx, filename);
495 state.pagecount = cbz_count_pages (state.u.cbz);
496 state.closedoc = closecbz;
497 state.freepage = freecbzpage;
498 break;
499 }
500 }
501
502 static void pdfinfo (void)
503 {
504 if (state.type == DPDF) {
505 pdf_obj *infoobj;
506
507 printd ("info PDF version\t%d.%d",
508 state.u.pdf->version / 10, state.u.pdf->version % 10);
509
510 infoobj = pdf_dict_gets (state.u.pdf->trailer, "Info");
511 if (infoobj) {
512 int i;
513 char *s;
514 char *items[] = { "Title", "Author", "Creator",
515 "Producer", "CreationDate" };
516
517 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
518 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
519 s = pdf_to_utf8 (state.u.pdf, obj);
520 if (*s) {
521 if (i == 0) {
522 printd ("title %s", s);
523 }
524 printd ("info %s\t%s", items[i], s);
525 }
526 fz_free (state.ctx, s);
527 }
528 }
529 printd ("infoend");
530 }
531 }
532
533 static void unlinktile (struct tile *tile)
534 {
535 int i;
536
537 for (i = 0; i < tile->slicecount; ++i) {
538 struct slice *s = &tile->slices[i];
539
540 if (s->texindex != -1) {
541 if (state.texowners[s->texindex].slice == s) {
542 state.texowners[s->texindex].slice = NULL;
543 }
544 }
545 }
546 }
547
548 static void freepage (struct page *page)
549 {
550 if (page->text) {
551 fz_free_text_page (state.ctx, page->text);
552 }
553 if (page->sheet) {
554 fz_free_text_sheet (state.ctx, page->sheet);
555 }
556 if (page->slinks) {
557 free (page->slinks);
558 }
559 page->freepage (page->u.ptr);
560 fz_free_display_list (state.ctx, page->dlist);
561 free (page);
562 }
563
564 static void freetile (struct tile *tile)
565 {
566 unlinktile (tile);
567 #ifndef PIGGYBACK
568 fz_drop_pixmap (state.ctx, tile->pixmap);
569 #else
570 if (state.pig) {
571 fz_drop_pixmap (state.ctx, state.pig);
572 }
573 state.pig = tile->pixmap;
574 #endif
575 free (tile);
576 }
577
578 #ifdef __ALTIVEC__
579 #include <altivec.h>
580
581 static int cacheline32bytes;
582
583 static void __attribute__ ((constructor)) clcheck (void)
584 {
585 char **envp = environ;
586 unsigned long *auxv;
587
588 while (*envp++);
589
590 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
591 if (*auxv == 19) {
592 cacheline32bytes = auxv[1] == 32;
593 return;
594 }
595 }
596 }
597
598 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
599 {
600 size_t size = pixmap->w * pixmap->h * pixmap->n;
601 if (cacheline32bytes && size > 32) {
602 intptr_t a1, a2, diff;
603 size_t sizea, i;
604 vector unsigned char v = vec_splat_u8 (-1);
605 vector unsigned char *p;
606
607 a1 = a2 = (intptr_t) pixmap->samples;
608 a2 = (a1 + 31) & ~31;
609 diff = a2 - a1;
610 sizea = size - diff;
611 p = (void *) a2;
612
613 while (a1 != a2) *(char *) a1++ = 0xff;
614 for (i = 0; i < (sizea & ~31); i += 32) {
615 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
616 vec_st (v, i, p);
617 vec_st (v, i + 16, p);
618 }
619 while (i < sizea) *((char *) a1 + i++) = 0xff;
620 }
621 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
622 }
623 #else
624 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
625 #endif
626
627 static fz_matrix trimctm (pdf_page *page, int pindex)
628 {
629 fz_matrix ctm;
630 struct pagedim *pdim = &state.pagedims[pindex];
631
632 if (!pdim->tctmready) {
633 if (state.trimmargins) {
634 fz_rect realbox;
635
636 ctm = fz_concat (fz_rotate (-pdim->rotate), fz_scale (1, -1));
637 realbox = fz_transform_rect (ctm, pdim->mediabox);
638 ctm = fz_concat (ctm, fz_translate (-realbox.x0, -realbox.y0));
639 ctm = fz_concat (fz_invert_matrix (page->ctm), ctm);
640 }
641 else {
642 ctm = fz_identity;
643 }
644 pdim->tctm = ctm;
645 pdim->tctmready = 1;
646 }
647 return pdim->tctm;
648 }
649
650 static fz_matrix pagectm (struct page *page)
651 {
652 if (page->type == DPDF) {
653 return fz_concat (trimctm (page->u.pdfpage, page->pdimno),
654 state.pagedims[page->pdimno].ctm);
655 }
656 else {
657 fz_matrix ctm;
658 struct pagedim *pdim = &state.pagedims[page->pdimno];
659
660 ctm = state.pagedims[page->pdimno].ctm;
661 ctm = fz_concat (fz_translate (-pdim->mediabox.x0,
662 -pdim->mediabox.y0), ctm);
663 return ctm;
664 }
665 }
666
667 static void *loadpage (int pageno, int pindex)
668 {
669 fz_device *dev;
670 struct page *page = NULL;
671
672 page = calloc (sizeof (struct page), 1);
673 if (!page) {
674 err (1, "calloc page %d", pageno);
675 }
676
677 page->dlist = fz_new_display_list (state.ctx);
678 dev = fz_new_list_device (state.ctx, page->dlist);
679 switch (state.type) {
680 case DPDF:
681 fz_try (state.ctx) {
682 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
683 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, fz_identity, NULL);
684 page->freepage = freepdfpage;
685 }
686 fz_catch (state.ctx) {
687 page->u.ptr = NULL;
688 page->freepage = freeemptypdfpage;
689 }
690 break;
691
692 case DXPS:
693 page->u.xpspage = xps_load_page (state.u.xps, pageno);
694 xps_run_page (state.u.xps, page->u.xpspage, dev, fz_identity, NULL);
695 page->freepage = freexpspage;
696 break;
697
698 case DCBZ:
699 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
700 cbz_run_page (state.u.cbz, page->u.cbzpage, dev, fz_identity, NULL);
701 page->freepage = freecbzpage;
702 break;
703 }
704 fz_free_device (dev);
705
706 page->pdimno = pindex;
707 page->pageno = pageno;
708 page->sgen = state.gen;
709 page->tgen = state.gen;
710 page->type = state.type;
711
712 return page;
713 }
714
715 static struct tile *alloctile (int h)
716 {
717 int i;
718 int slicecount;
719 size_t tilesize;
720 struct tile *tile;
721
722 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
723 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
724 tile = calloc (tilesize, 1);
725 if (!tile) {
726 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
727 }
728 for (i = 0; i < slicecount; ++i) {
729 int sh = MIN (h, state.sliceheight);
730 tile->slices[i].h = sh;
731 tile->slices[i].texindex = -1;
732 h -= sh;
733 }
734 tile->slicecount = slicecount;
735 tile->sliceheight = state.sliceheight;
736 return tile;
737 }
738
739 #ifdef OBSCURED_OPT
740 struct obs {
741 int cured;
742 fz_bbox b;
743 };
744
745 static void obs_fill_image (fz_device *dev, fz_image *image, fz_matrix ctm,
746 float alpha)
747 {
748 struct obs *obs = dev->user;
749
750 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
751 fz_bbox b = fz_round_rect (fz_transform_rect (ctm, fz_unit_rect));
752 b = fz_intersect_bbox (b, obs->b);
753 obs->cured = b.x0 == obs->b.x0
754 && b.x1 == obs->b.x1
755 && b.y0 == obs->b.y0
756 && b.y1 == obs->b.y1;
757 }
758 }
759
760 static int obscured (struct page *page, fz_bbox bbox)
761 {
762 fz_device dev;
763 struct obs obs;
764
765 memset (&dev, 0, sizeof (dev));
766 memset (&obs, 0, sizeof (obs));
767 dev.hints = 0;
768 dev.flags = 0;
769 dev.user = &obs;
770 dev.ctx = state.ctx;
771 dev.fill_image = obs_fill_image;
772 obs.b = bbox;
773 fz_run_display_list (page->dlist, &dev, pagectm (page), bbox, NULL);
774 return obs.cured;
775 }
776 #define OBSCURED obscured
777 #else
778 #define OBSCURED(a, b) 0
779 #endif
780
781 static struct tile *rendertile (struct page *page, int x, int y, int w, int h)
782 {
783 fz_bbox bbox;
784 fz_device *dev;
785 struct tile *tile;
786 struct pagedim *pdim;
787
788 tile = alloctile (h);
789 pdim = &state.pagedims[page->pdimno];
790
791 bbox = pdim->bounds;
792 bbox.x0 += x;
793 bbox.y0 += y;
794 bbox.x1 = bbox.x0 + w;
795 bbox.y1 = bbox.y0 + h;
796
797 if (state.pig) {
798 if (state.pig->w == w
799 && state.pig->h == h
800 && state.pig->colorspace == state.colorspace) {
801 tile->pixmap = state.pig;
802 tile->pixmap->x = bbox.x0;
803 tile->pixmap->y = bbox.y0;
804 }
805 else {
806 fz_drop_pixmap (state.ctx, state.pig);
807 }
808 state.pig = NULL;
809 }
810 if (!tile->pixmap) {
811 tile->pixmap =
812 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, bbox);
813 }
814
815 tile->w = w;
816 tile->h = h;
817 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
818 clearpixmap (tile->pixmap);
819 }
820 dev = fz_new_draw_device (state.ctx, tile->pixmap);
821 fz_run_display_list (page->dlist, dev, pagectm (page), bbox, NULL);
822 fz_free_device (dev);
823
824 return tile;
825 }
826
827 static void initpdims (void)
828 {
829 double start, end;
830 int pageno, trim, show;
831 FILE *trimf = NULL;
832 int trimw = 0;
833
834 start = now ();
835
836 if (state.trimmargins && state.trimcachepath) {
837 trimf = fopen (state.trimcachepath, "rb");
838 if (!trimf) {
839 trimf = fopen (state.trimcachepath, "wb");
840 trimw = 1;
841 }
842 }
843 for (pageno = 0; pageno < state.pagecount; ++pageno) {
844 int rotate = 0;
845 struct pagedim *p;
846 fz_rect mediabox;
847
848 switch (state.type) {
849 case DPDF: {
850 pdf_obj *pageobj = state.u.pdf->page_objs[pageno];
851
852 if (state.trimmargins) {
853 pdf_obj *obj;
854 pdf_page *page;
855
856 fz_try (state.ctx) {
857 page = pdf_load_page (state.u.pdf, pageno);
858 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
859 trim = state.trimanew || !obj;
860 if (trim) {
861 fz_rect rect;
862 fz_bbox bbox;
863 fz_matrix ctm;
864 fz_device *dev;
865
866 dev = fz_new_bbox_device (state.ctx, &bbox);
867 dev->hints |= FZ_IGNORE_SHADE;
868 ctm = fz_invert_matrix (page->ctm);
869 pdf_run_page (state.u.pdf, page, dev, fz_identity, NULL);
870 fz_free_device (dev);
871
872 rect.x0 = bbox.x0 + state.trimfuzz.x0;
873 rect.x1 = bbox.x1 + state.trimfuzz.x1;
874 rect.y0 = bbox.y0 + state.trimfuzz.y0;
875 rect.y1 = bbox.y1 + state.trimfuzz.y1;
876 rect = fz_transform_rect (ctm, rect);
877 rect = fz_intersect_rect (rect, page->mediabox);
878
879 if (fz_is_empty_rect (rect)) {
880 mediabox = page->mediabox;
881 }
882 else {
883 mediabox = rect;
884 }
885
886 obj = pdf_new_array (state.ctx, 4);
887 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x0));
888 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y0));
889 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x1));
890 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y1));
891 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
892 }
893 else {
894 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
895 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
896 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
897 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
898 }
899
900 rotate = page->rotate;
901 pdf_free_page (state.u.pdf, page);
902
903 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
904 if (show) {
905 printd ("progress %f Trimming %d",
906 (double) (pageno + 1) / state.pagecount,
907 pageno + 1);
908 }
909 }
910 fz_catch (state.ctx) {
911 }
912 }
913 else {
914 fz_rect cropbox;
915
916 mediabox = pdf_to_rect (state.ctx,
917 pdf_dict_gets (pageobj, "MediaBox"));
918 if (fz_is_empty_rect (mediabox)) {
919 fprintf (stderr, "cannot find page size for page %d\n",
920 pageno+1);
921 mediabox.x0 = 0;
922 mediabox.y0 = 0;
923 mediabox.x1 = 612;
924 mediabox.y1 = 792;
925 }
926
927 cropbox = pdf_to_rect (state.ctx,
928 pdf_dict_gets (pageobj, "CropBox"));
929 if (!fz_is_empty_rect (cropbox)) {
930 mediabox = fz_intersect_rect (mediabox, cropbox);
931 }
932 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
933 }
934 break;
935 }
936
937 case DXPS:
938 {
939 xps_page *page;
940
941 page = xps_load_page (state.u.xps, pageno);
942 mediabox = xps_bound_page (state.u.xps, page);
943 rotate = 0;
944 if (state.trimmargins) {
945 fz_rect rect;
946 fz_bbox bbox;
947 fz_device *dev;
948
949 dev = fz_new_bbox_device (state.ctx, &bbox);
950 dev->hints |= FZ_IGNORE_SHADE;
951 xps_run_page (state.u.xps, page, dev, fz_identity, NULL);
952 fz_free_device (dev);
953
954 rect.x0 = bbox.x0 + state.trimfuzz.x0;
955 rect.x1 = bbox.x1 + state.trimfuzz.x1;
956 rect.y0 = bbox.y0 + state.trimfuzz.y0;
957 rect.y1 = bbox.y1 + state.trimfuzz.y1;
958 rect = fz_intersect_rect (rect, mediabox);
959
960 if (!fz_is_empty_rect (rect)) {
961 mediabox = rect;
962 }
963 }
964 xps_free_page (state.u.xps, page);
965 printd ("progress %f loading %d",
966 (double) (pageno + 1) / state.pagecount,
967 pageno + 1);
968 }
969 break;
970
971 case DCBZ:
972 {
973 rotate = 0;
974 if (state.trimmargins && trimw) {
975 cbz_page *page;
976
977 page = cbz_load_page (state.u.cbz, pageno);
978 mediabox = cbz_bound_page (state.u.cbz, page);
979 cbz_free_page (state.u.cbz, page);
980 printd ("progress %f Trimming %d",
981 (double) (pageno + 1) / state.pagecount,
982 pageno + 1);
983 if (trimf) {
984 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
985 if (n - 1) {
986 err (1, "fwrite trim mediabox");
987 }
988 }
989 }
990 else {
991 if (trimf) {
992 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
993 if (n - 1) {
994 err (1, "fread trim mediabox");
995 }
996 }
997 else {
998 mediabox.x0 = mediabox.y0 = 0;
999 mediabox.x1 = 900;
1000 mediabox.y1 = 900;
1001 }
1002 }
1003 }
1004 break;
1005
1006 default:
1007 ARSERT (0 && state.type);
1008 }
1009
1010 if (state.pagedimcount == 0
1011 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1012 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1013 size_t size;
1014
1015 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1016 state.pagedims = realloc (state.pagedims, size);
1017 if (!state.pagedims) {
1018 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1019 size, state.pagedimcount + 1);
1020 }
1021
1022 p = &state.pagedims[state.pagedimcount++];
1023 p->rotate = rotate;
1024 p->mediabox = mediabox;
1025 p->pageno = pageno;
1026 }
1027 }
1028 end = now ();
1029 if (state.trimmargins) {
1030 printd ("progress 1 Trimmed %d pages in %f seconds",
1031 state.pagecount, end - start);
1032 }
1033 else {
1034 printd ("vmsg Processed %d pages in %f seconds",
1035 state.pagecount, end - start);
1036 }
1037 state.trimanew = 0;
1038 if (trimf) {
1039 if (fclose (trimf)) {
1040 err (1, "fclose");
1041 }
1042 }
1043 }
1044
1045 static void layout (void)
1046 {
1047 int pindex;
1048 fz_rect box;
1049 fz_matrix ctm;
1050 double zoom, w, maxw = 0;
1051 struct pagedim *p = state.pagedims;
1052
1053 if (state.proportional) {
1054 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1055 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1056 p->mediabox);
1057 w = box.x1 - box.x0;
1058 maxw = MAX (w, maxw);
1059 }
1060 }
1061
1062 p = state.pagedims;
1063 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1064 fz_bbox bbox;
1065
1066 ctm = fz_rotate (state.rotate);
1067 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1068 p->mediabox);
1069 w = box.x1 - box.x0;
1070
1071 if (state.proportional) {
1072 double scale = w / maxw;
1073 zoom = (state.w / w) * scale;
1074 }
1075 else {
1076 zoom = state.w / w;
1077 }
1078
1079 p->zoomctm = fz_scale (zoom, zoom);
1080 ctm = fz_concat (p->zoomctm, ctm);
1081
1082 p->pagebox = fz_transform_rect (fz_rotate (p->rotate), p->mediabox);
1083 p->pagebox.x1 -= p->pagebox.x0;
1084 p->pagebox.y1 -= p->pagebox.y0;
1085 p->pagebox.x0 = 0;
1086 p->pagebox.y0 = 0;
1087 bbox = fz_round_rect (fz_transform_rect (ctm, p->pagebox));
1088
1089 p->bounds = bbox;
1090 p->left = state.proportional ? ((maxw - w) * zoom) / 2.0 : 0;
1091 p->ctm = ctm;
1092
1093 ctm = fz_identity;
1094 ctm = fz_concat (ctm, fz_translate (0, -p->mediabox.y1));
1095 ctm = fz_concat (ctm, fz_scale (zoom, -zoom));
1096 ctm = fz_concat (ctm, fz_rotate (p->rotate + state.rotate));
1097 p->lctm = ctm;
1098
1099 p->tctmready = 0;
1100 }
1101
1102 while (p-- != state.pagedims) {
1103 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1104 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1105 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1106 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1107 int w = x1 - x0;
1108 int h = y1 - y0;
1109
1110 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1111 }
1112 }
1113
1114 static void recurse_outline (fz_outline *outline, int level)
1115 {
1116 while (outline) {
1117 fz_link_dest *dest;
1118 int i, top = 0;
1119 struct pagedim *pdim = state.pagedims;
1120
1121 dest = &outline->dest;
1122 for (i = 0; i < state.pagedimcount; ++i) {
1123 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1124 break;
1125 pdim = &state.pagedims[i];
1126 }
1127 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1128 fz_point p;
1129 p.x = 0;
1130 p.y = dest->ld.gotor.lt.y;
1131 p = fz_transform_point (pdim->lctm, p);
1132 top = p.y;
1133 }
1134 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1135 int h;
1136 double y0, y1;
1137
1138 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1139 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1140 h = y1 - y0;
1141 printd ("o %d %d %d %d %s",
1142 level, dest->ld.gotor.page, top, h, outline->title);
1143 }
1144 if (outline->down) {
1145 recurse_outline (outline->down, level + 1);
1146 }
1147 outline = outline->next;
1148 }
1149 }
1150
1151 static void process_outline (void)
1152 {
1153 fz_outline *outline;
1154
1155 if (!state.needoutline) return;
1156
1157 state.needoutline = 0;
1158 switch (state.type) {
1159 case DPDF:
1160 outline = pdf_load_outline (state.u.pdf);
1161 break;
1162 case DXPS:
1163 outline = xps_load_outline (state.u.xps);
1164 break;
1165 default:
1166 outline = NULL;
1167 break;
1168 }
1169 if (outline) {
1170 recurse_outline (outline, 0);
1171 fz_free_outline (state.ctx, outline);
1172 }
1173 }
1174
1175 static char *strofspan (fz_text_span *span)
1176 {
1177 char *p;
1178 char utf8[10];
1179 fz_text_char *ch;
1180 size_t size = 0, cap = 80;
1181
1182 p = malloc (cap + 1);
1183 if (!p) return NULL;
1184
1185 for (ch = span->text; ch < span->text + span->len; ++ch) {
1186 int n = fz_runetochar (utf8, ch->c);
1187 if (size + n > cap) {
1188 cap *= 2;
1189 p = realloc (p, cap + 1);
1190 if (!p) return NULL;
1191 }
1192
1193 memcpy (p + size, utf8, n);
1194 size += n;
1195 }
1196 p[size] = 0;
1197 return p;
1198 }
1199
1200 static int matchspan (regex_t *re, fz_text_span *span, fz_matrix ctm,
1201 int stop, int pageno, double start)
1202 {
1203 int ret;
1204 char *p;
1205 regmatch_t rm;
1206 int a, b, c;
1207 fz_rect *sb, *eb;
1208 fz_point p1, p2, p3, p4;
1209
1210 p = strofspan (span);
1211 if (!p) return -1;
1212
1213 ret = regexec (re, p, 1, &rm, 0);
1214 if (ret) {
1215 free (p);
1216 if (ret != REG_NOMATCH) {
1217 size_t size;
1218 char errbuf[80];
1219 size = regerror (ret, re, errbuf, sizeof (errbuf));
1220 printd ("msg regexec error `%.*s'",
1221 (int) size, errbuf);
1222 return -1;
1223 }
1224 return 0;
1225 }
1226 else {
1227 int l = span->len;
1228 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1229 c += fz_runelen (span->text[a].c);
1230 }
1231 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1232 c += fz_runelen (span->text[b].c);
1233 }
1234
1235 if (fz_runelen (span->text[b].c) > 1) {
1236 b = MAX (0, b-1);
1237 }
1238 sb = &span->text[MIN (a, l-1)].bbox;
1239 eb = &span->text[MIN (b, l-1)].bbox;
1240
1241 p1.x = sb->x0;
1242 p1.y = sb->y0;
1243 p2.x = eb->x1;
1244 p2.y = sb->y0;
1245 p3.x = eb->x1;
1246 p3.y = eb->y1;
1247 p4.x = sb->x0;
1248 p4.y = eb->y1;
1249
1250 if (!stop) {
1251 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1252 pageno, 1,
1253 p1.x, p1.y,
1254 p2.x, p2.y,
1255 p3.x, p3.y,
1256 p4.x, p4.y);
1257
1258 printd ("progress 1 found at %d `%.*s' in %f sec",
1259 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1260 now () - start);
1261 }
1262 else {
1263 printd ("match %d %d %f %f %f %f %f %f %f %f",
1264 pageno, 2,
1265 p1.x, p1.y,
1266 p2.x, p2.y,
1267 p3.x, p3.y,
1268 p4.x, p4.y);
1269 }
1270 free (p);
1271 return 1;
1272 }
1273 }
1274
1275 static int compareblocks (const void *l, const void *r)
1276 {
1277 fz_text_block const *ls = l;
1278 fz_text_block const* rs = r;
1279 return ls->bbox.y0 - rs->bbox.y0;
1280 }
1281
1282 /* wishful thinking function */
1283 static void search (regex_t *re, int pageno, int y, int forward)
1284 {
1285 int i, j;
1286 fz_matrix ctm;
1287 fz_device *tdev;
1288 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1289 fz_text_page *text;
1290 fz_text_sheet *sheet;
1291 struct pagedim *pdim, *pdimprev;
1292 int stop = 0, niters = 0;
1293 double start, end;
1294
1295 if (!(state.type == DPDF || state.type == DXPS))
1296 return;
1297
1298 start = now ();
1299 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1300 if (niters++ == 5) {
1301 niters = 0;
1302 if (hasdata ()) {
1303 printd ("progress 1 attention requested aborting search at %d",
1304 pageno);
1305 stop = 1;
1306 }
1307 else {
1308 printd ("progress %f searching in page %d",
1309 (double) (pageno + 1) / state.pagecount,
1310 pageno);
1311 }
1312 }
1313 pdimprev = NULL;
1314 for (i = 0; i < state.pagedimcount; ++i) {
1315 pdim = &state.pagedims[i];
1316 if (pdim->pageno == pageno) {
1317 goto found;
1318 }
1319 if (pdim->pageno > pageno) {
1320 pdim = pdimprev;
1321 goto found;
1322 }
1323 pdimprev = pdim;
1324 }
1325 pdim = pdimprev;
1326 found:
1327
1328 sheet = fz_new_text_sheet (state.ctx);
1329 text = fz_new_text_page (state.ctx, fz_infinite_rect);
1330 tdev = fz_new_text_device (state.ctx, sheet, text);
1331
1332 switch (state.type) {
1333 case DPDF:
1334 u.ptr = NULL;
1335 fz_try (state.ctx) {
1336 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1337 trimctm (u.pdfpage, pdim - state.pagedims);
1338 ctm = fz_concat (pdim->tctm, pdim->zoomctm);
1339 pdf_run_page (state.u.pdf, u.pdfpage, tdev, ctm, NULL);
1340 }
1341 fz_catch (state.ctx) {
1342 fz_free_device (tdev);
1343 u.ptr = NULL;
1344 goto nextiter;
1345 }
1346 break;
1347
1348 case DXPS:
1349 u.xpspage = xps_load_page (state.u.xps, pageno);
1350 ctm = pdim->ctm;
1351 xps_run_page (state.u.xps, u.xpspage, tdev, ctm, NULL);
1352 break;
1353
1354 default:
1355 ARSERT (0 && state.type);
1356 }
1357
1358 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1359 fz_free_device (tdev);
1360
1361 for (j = 0; j < text->len; ++j) {
1362 int k;
1363 fz_text_block *block;
1364
1365 block = &text->blocks[forward ? j : text->len - 1 - j];
1366
1367 for (k = 0; k < block->len; ++k) {
1368 fz_text_line *line;
1369 fz_text_span *span;
1370
1371 if (forward) {
1372 line = &block->lines[k];
1373 if (line->bbox.y0 < y + 1) continue;
1374 }
1375 else {
1376 line = &block->lines[block->len - 1 - k];
1377 if (line->bbox.y0 > y - 1) continue;
1378 }
1379
1380 for (span = line->spans;
1381 span < line->spans + line->len;
1382 ++span) {
1383
1384 switch (matchspan (re, span, ctm, stop, pageno, start)) {
1385 case 0: break;
1386 case 1: stop = 1; break;
1387 case -1: stop = 1; goto endloop;
1388 }
1389 }
1390 }
1391 }
1392 nextiter:
1393 if (forward) {
1394 pageno += 1;
1395 y = 0;
1396 }
1397 else {
1398 pageno -= 1;
1399 y = INT_MAX;
1400 }
1401 endloop:
1402 fz_free_text_page (state.ctx, text);
1403 fz_free_text_sheet (state.ctx, sheet);
1404 if (u.ptr) {
1405 state.freepage (u.ptr);
1406 }
1407 }
1408 end = now ();
1409 if (!stop) {
1410 printd ("progress 1 no matches %f sec", end - start);
1411 }
1412 printd ("clearrects");
1413 }
1414
1415 static void set_tex_params (int colorspace)
1416 {
1417 union {
1418 unsigned char b;
1419 unsigned int s;
1420 } endianness = {1};
1421
1422 switch (colorspace) {
1423 case 0:
1424 state.texiform = GL_RGBA8;
1425 state.texform = GL_RGBA;
1426 state.texty = GL_UNSIGNED_BYTE;
1427 state.colorspace = fz_device_rgb;
1428 break;
1429 case 1:
1430 state.texiform = GL_RGBA8;
1431 state.texform = GL_BGRA;
1432 state.texty = endianness.s > 1
1433 ? GL_UNSIGNED_INT_8_8_8_8
1434 : GL_UNSIGNED_INT_8_8_8_8_REV;
1435 state.colorspace = fz_device_bgr;
1436 break;
1437 case 2:
1438 state.texiform = GL_LUMINANCE_ALPHA;
1439 state.texform = GL_LUMINANCE_ALPHA;
1440 state.texty = GL_UNSIGNED_BYTE;
1441 state.colorspace = fz_device_gray;
1442 break;
1443 default:
1444 errx (1, "invalid colorspce %d", colorspace);
1445 }
1446 }
1447
1448 static void realloctexts (int texcount)
1449 {
1450 size_t size;
1451
1452 if (texcount == state.texcount) return;
1453
1454 if (texcount < state.texcount) {
1455 glDeleteTextures (state.texcount - texcount,
1456 state.texids + texcount);
1457 }
1458
1459 size = texcount * sizeof (*state.texids);
1460 state.texids = realloc (state.texids, size);
1461 if (!state.texids) {
1462 err (1, "realloc texids %" FMT_s, size);
1463 }
1464
1465 size = texcount * sizeof (*state.texowners);
1466 state.texowners = realloc (state.texowners, size);
1467 if (!state.texowners) {
1468 err (1, "realloc texowners %" FMT_s, size);
1469 }
1470 if (texcount > state.texcount) {
1471 int i;
1472
1473 glGenTextures (texcount - state.texcount,
1474 state.texids + state.texcount);
1475 for (i = state.texcount; i < texcount; ++i) {
1476 state.texowners[i].w = -1;
1477 state.texowners[i].slice = NULL;
1478 }
1479 }
1480 state.texcount = texcount;
1481 state.texindex = 0;
1482 }
1483
1484 static char *mbtoutf8 (char *s)
1485 {
1486 char *p, *r;
1487 wchar_t *tmp;
1488 size_t i, ret, len;
1489
1490 len = mbstowcs (NULL, s, strlen (s));
1491 if (len == 0) {
1492 return s;
1493 }
1494 else {
1495 if (len == (size_t) -1) {
1496 return s;
1497 }
1498 }
1499
1500 tmp = malloc (len * sizeof (wchar_t));
1501 if (!tmp) {
1502 return s;
1503 }
1504
1505 ret = mbstowcs (tmp, s, len);
1506 if (ret == (size_t) -1) {
1507 free (tmp);
1508 return s;
1509 }
1510
1511 len = 0;
1512 for (i = 0; i < ret; ++i) {
1513 len += fz_runelen (tmp[i]);
1514 }
1515
1516 p = r = malloc (len);
1517 if (!r) {
1518 free (tmp);
1519 return s;
1520 }
1521
1522 for (i = 0; i < ret; ++i) {
1523 p += fz_runetochar (p, tmp[i]);
1524 }
1525 return r;
1526 }
1527
1528 CAMLprim value ml_mbtoutf8 (value s_v)
1529 {
1530 CAMLparam1 (s_v);
1531 CAMLlocal1 (ret_v);
1532 char *s, *r;
1533
1534 s = String_val (s_v);
1535 r = mbtoutf8 (s);
1536 if (r == s) {
1537 ret_v = s_v;
1538 }
1539 else {
1540 ret_v = caml_copy_string (r);
1541 free (r);
1542 }
1543 CAMLreturn (ret_v);
1544 }
1545
1546 static void * mainloop (void *unused)
1547 {
1548 char *p = NULL;
1549 int len, ret, oldlen = 0;
1550
1551 for (;;) {
1552 len = readlen ();
1553 if (len == 0) {
1554 errx (1, "readlen returned 0");
1555 }
1556
1557 if (oldlen < len + 1) {
1558 p = realloc (p, len + 1);
1559 if (!p) {
1560 err (1, "realloc %d failed", len + 1);
1561 }
1562 oldlen = len + 1;
1563 }
1564 readdata (p, len);
1565 p[len] = 0;
1566
1567 if (!strncmp ("open", p, 4)) {
1568 size_t filenamelen;
1569 char *password;
1570 char *filename = p + 5;
1571 char *utf8filename;
1572
1573 filenamelen = strlen (filename);
1574 password = filename + filenamelen + 1;
1575
1576 openxref (filename, password);
1577 pdfinfo ();
1578 initpdims ();
1579 utf8filename = mbtoutf8 (filename);
1580 printd ("msg Opened %s (press h/F1 to get help)", utf8filename);
1581 if (utf8filename != filename) {
1582 free (utf8filename);
1583 }
1584 state.needoutline = 1;
1585 }
1586 else if (!strncmp ("cs", p, 2)) {
1587 int i, colorspace;
1588
1589 ret = sscanf (p + 2, " %d", &colorspace);
1590 if (ret != 1) {
1591 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1592 }
1593 lock ("cs");
1594 set_tex_params (colorspace);
1595 for (i = 0; i < state.texcount; ++i) {
1596 state.texowners[i].w = -1;
1597 state.texowners[i].slice = NULL;
1598 }
1599 unlock ("cs");
1600 }
1601 else if (!strncmp ("freepage", p, 8)) {
1602 void *ptr;
1603
1604 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1605 if (ret != 1) {
1606 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1607 }
1608 freepage (ptr);
1609 }
1610 else if (!strncmp ("freetile", p, 8)) {
1611 void *ptr;
1612
1613 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1614 if (ret != 1) {
1615 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1616 }
1617 freetile (ptr);
1618 }
1619 else if (!strncmp ("search", p, 6)) {
1620 int icase, pageno, y, ret, len2, forward;
1621 char *pattern;
1622 regex_t re;
1623
1624 ret = sscanf (p + 6, " %d %d %d %d,%n",
1625 &icase, &pageno, &y, &forward, &len2);
1626 if (ret != 4) {
1627 errx (1, "malformed search `%s' ret=%d", p, ret);
1628 }
1629
1630 pattern = p + 6 + len2;
1631 ret = regcomp (&re, pattern,
1632 REG_EXTENDED | (icase ? REG_ICASE : 0));
1633 if (ret) {
1634 char errbuf[80];
1635 size_t size;
1636
1637 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1638 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1639 }
1640 else {
1641 search (&re, pageno, y, forward);
1642 regfree (&re);
1643 }
1644 }
1645 else if (!strncmp ("geometry", p, 8)) {
1646 int w, h;
1647
1648 printd ("clear");
1649 ret = sscanf (p + 8, " %d %d", &w, &h);
1650 if (ret != 2) {
1651 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1652 }
1653
1654 lock ("geometry");
1655 state.h = h;
1656 if (w != state.w) {
1657 int i;
1658 state.w = w;
1659 for (i = 0; i < state.texcount; ++i) {
1660 state.texowners[i].slice = NULL;
1661 }
1662 }
1663 layout ();
1664 process_outline ();
1665 state.gen++;
1666 unlock ("geometry");
1667 printd ("continue %d", state.pagecount);
1668 }
1669 else if (!strncmp ("reqlayout", p, 9)) {
1670 int rotate, proportional;
1671
1672 printd ("clear");
1673 ret = sscanf (p + 9, " %d %d", &rotate, &proportional);
1674 if (ret != 2) {
1675 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1676 }
1677 lock ("reqlayout");
1678 if (state.rotate != rotate || state.proportional != proportional) {
1679 state.gen += 1;
1680 }
1681 state.rotate = rotate;
1682 state.proportional = proportional;
1683 layout ();
1684 process_outline ();
1685 state.gen++;
1686 unlock ("reqlayout");
1687 printd ("continue %d", state.pagecount);
1688 }
1689 else if (!strncmp ("page", p, 4)) {
1690 double a, b;
1691 struct page *page;
1692 int pageno, pindex, ret;
1693
1694 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1695 if (ret != 2) {
1696 errx (1, "bad render line `%.*s' ret=%d", len, p, ret);
1697 }
1698
1699 lock ("page");
1700 a = now ();
1701 page = loadpage (pageno, pindex);
1702 b = now ();
1703 unlock ("page");
1704
1705 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
1706 }
1707 else if (!strncmp ("tile", p, 4)) {
1708 int x, y, w, h, ret;
1709 struct page *page;
1710 struct tile *tile;
1711 double a, b;
1712
1713 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d",
1714 FMT_ptr_cast (&page), &x, &y, &w, &h);
1715 if (ret != 5) {
1716 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
1717 }
1718
1719 lock ("tile");
1720 a = now ();
1721 tile = rendertile (page, x, y, w, h);
1722 b = now ();
1723 unlock ("tile");
1724
1725 printd ("tile %d %d %" FMT_ptr " %u %f",
1726 x, y,
1727 FMT_ptr_cast2 (tile),
1728 tile->w * tile->h * tile->pixmap->n,
1729 b - a);
1730 }
1731 else if (!strncmp ("settrim", p, 7)) {
1732 int trimmargins;
1733 fz_bbox fuzz;
1734
1735 ret = sscanf (p + 7, " %d %d %d %d %d", &trimmargins,
1736 &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
1737 if (ret != 5) {
1738 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
1739 }
1740 printd ("clear");
1741 lock ("settrim");
1742 state.trimmargins = trimmargins;
1743 state.needoutline = 1;
1744 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
1745 state.trimanew = 1;
1746 state.trimfuzz = fuzz;
1747 }
1748 state.pagedimcount = 0;
1749 free (state.pagedims);
1750 state.pagedims = NULL;
1751 initpdims ();
1752 layout ();
1753 process_outline ();
1754 unlock ("settrim");
1755 printd ("continue %d", state.pagecount);
1756 }
1757 else if (!strncmp ("sliceh", p, 6)) {
1758 int h;
1759
1760 ret = sscanf (p + 6, " %d", &h);
1761 if (ret != 1) {
1762 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
1763 }
1764 if (h != state.sliceheight) {
1765 int i;
1766
1767 state.sliceheight = h;
1768 for (i = 0; i < state.texcount; ++i) {
1769 state.texowners[i].w = -1;
1770 state.texowners[i].h = -1;
1771 state.texowners[i].slice = NULL;
1772 }
1773 }
1774 }
1775 else if (!strncmp ("interrupt", p, 9)) {
1776 printd ("vmsg interrupted");
1777 }
1778 else {
1779 errx (1, "unknown command %.*s", len, p);
1780 }
1781 }
1782 return 0;
1783 }
1784
1785 CAMLprim value ml_realloctexts (value texcount_v)
1786 {
1787 CAMLparam1 (texcount_v);
1788 int ok;
1789
1790 if (trylock ("ml_realloctexts")) {
1791 ok = 0;
1792 goto done;
1793 }
1794 realloctexts (Int_val (texcount_v));
1795 ok = 1;
1796 unlock ("ml_realloctexts");
1797
1798 done:
1799 CAMLreturn (Val_bool (ok));
1800 }
1801
1802 static void showsel (struct page *page, int ox, int oy)
1803 {
1804 int seen = 0;
1805 fz_bbox bbox;
1806 fz_text_line *line;
1807 fz_text_span *span;
1808 fz_text_block *block;
1809 struct mark first, last;
1810
1811 first = page->fmark;
1812 last = page->lmark;
1813
1814 if (!first.span || !last.span) return;
1815
1816 glEnable (GL_BLEND);
1817 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
1818 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
1819
1820 ox += state.pagedims[page->pdimno].bounds.x0;
1821 oy += state.pagedims[page->pdimno].bounds.y0;
1822 for (block = page->text->blocks;
1823 block < page->text->blocks + page->text->len;
1824 ++block) {
1825 for (line = block->lines;
1826 line < block->lines + block->len;
1827 ++line) {
1828 for (span = line->spans;
1829 span < line->spans + line->len;
1830 ++span) {
1831 int i, j, k;
1832
1833 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
1834
1835 j = 0;
1836 k = span->len - 1;
1837
1838 if (span == page->fmark.span && span == page->lmark.span) {
1839 seen = 1;
1840 j = MIN (first.i, last.i);
1841 k = MAX (first.i, last.i);
1842 }
1843 else if (span == first.span) {
1844 seen = 1;
1845 j = first.i;
1846 }
1847 else if (span == last.span) {
1848 seen = 1;
1849 k = last.i;
1850 }
1851
1852 if (seen) {
1853 for (i = j; i <= k; ++i) {
1854 fz_bbox b = fz_round_rect (span->text[i].bbox);
1855 bbox = fz_union_bbox (bbox, b);
1856 }
1857 lprintf ("%d %d %d %d oy=%d ox=%d\n",
1858 bbox.x0,
1859 bbox.y0,
1860 bbox.x1,
1861 bbox.y1,
1862 oy, ox);
1863
1864 glRecti (bbox.x0 + ox, bbox.y0 + oy,
1865 bbox.x1 + ox, bbox.y1 + oy);
1866 if (span == last.span) {
1867 goto done;
1868 }
1869 }
1870 }
1871 }
1872 }
1873 done:
1874 glDisable (GL_BLEND);
1875 }
1876
1877 #include "glfont.c"
1878
1879 static void highlightlinks (struct page *page, int xoff, int yoff)
1880 {
1881 fz_matrix ctm;
1882 fz_link *link, *links;
1883
1884 switch (page->type) {
1885 case DPDF:
1886 links = page->u.pdfpage->links;
1887 break;
1888
1889 case DXPS:
1890 links = page->u.xpspage->links;
1891 break;
1892
1893 default:
1894 return;
1895 }
1896
1897 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
1898 glEnable (GL_LINE_STIPPLE);
1899 glLineStipple (0.5, 0xcccc);
1900
1901 xoff -= state.pagedims[page->pdimno].bounds.x0;
1902 yoff -= state.pagedims[page->pdimno].bounds.y0;
1903 ctm = fz_concat (pagectm (page), fz_translate (xoff, yoff));
1904
1905 glBegin (GL_QUADS);
1906 for (link = links; link; link = link->next) {
1907 fz_point p1, p2, p3, p4;
1908
1909 p1.x = link->rect.x0;
1910 p1.y = link->rect.y0;
1911
1912 p2.x = link->rect.x1;
1913 p2.y = link->rect.y0;
1914
1915 p3.x = link->rect.x1;
1916 p3.y = link->rect.y1;
1917
1918 p4.x = link->rect.x0;
1919 p4.y = link->rect.y1;
1920
1921 p1 = fz_transform_point (ctm, p1);
1922 p2 = fz_transform_point (ctm, p2);
1923 p3 = fz_transform_point (ctm, p3);
1924 p4 = fz_transform_point (ctm, p4);
1925
1926 switch (link->dest.kind) {
1927 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
1928 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
1929 default: glColor3ub (0, 0, 0); break;
1930 }
1931
1932 glVertex2f (p1.x, p1.y);
1933 glVertex2f (p2.x, p2.y);
1934 glVertex2f (p3.x, p3.y);
1935 glVertex2f (p4.x, p4.y);
1936 }
1937 glEnd ();
1938
1939 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
1940 glDisable (GL_LINE_STIPPLE);
1941 }
1942
1943 static int compareslinks (const void *l, const void *r)
1944 {
1945 struct slink const *ls = l;
1946 struct slink const *rs = r;
1947 if (ls->bbox.y0 == rs->bbox.y0) {
1948 return rs->bbox.x0 - rs->bbox.x0;
1949 }
1950 return ls->bbox.y0 - rs->bbox.y0;
1951 }
1952
1953 static void droptext (struct page *page)
1954 {
1955 if (page->text) {
1956 fz_free_text_page (state.ctx, page->text);
1957 page->fmark.i = -1;
1958 page->lmark.i = -1;
1959 page->fmark.span = NULL;
1960 page->lmark.span = NULL;
1961 page->text = NULL;
1962 }
1963 if (page->sheet) {
1964 fz_free_text_sheet (state.ctx, page->sheet);
1965 }
1966 }
1967
1968 static void dropslinks (struct page *page)
1969 {
1970 if (page->slinks) {
1971 free (page->slinks);
1972 page->slinks = NULL;
1973 page->slinkcount = 0;
1974 }
1975 }
1976
1977 static void ensureslinks (struct page *page)
1978 {
1979 fz_matrix ctm;
1980 int i, count = 0;
1981 size_t slinksize = sizeof (*page->slinks);
1982 fz_link *link, *links;
1983
1984 if (state.gen != page->sgen) {
1985 dropslinks (page);
1986 page->sgen = state.gen;
1987 }
1988 if (page->slinks) return;
1989
1990 switch (page->type) {
1991 case DPDF:
1992 links = page->u.pdfpage->links;
1993 ctm = fz_concat (trimctm (page->u.pdfpage, page->pdimno),
1994 state.pagedims[page->pdimno].ctm);
1995 break;
1996
1997 case DXPS:
1998 links = page->u.xpspage->links;
1999 ctm = state.pagedims[page->pdimno].ctm;
2000 break;
2001
2002 default:
2003 return;
2004 }
2005
2006 for (link = links; link; link = link->next) {
2007 count++;
2008 }
2009 if (count > 0) {
2010 page->slinkcount = count;
2011 page->slinks = calloc (count, slinksize);
2012 if (!page->slinks) {
2013 err (1, "realloc slinks %d", count);
2014 }
2015
2016 for (i = 0, link = links; link; ++i, link = link->next) {
2017 page->slinks[i].link = link;
2018 page->slinks[i].bbox =
2019 fz_round_rect (fz_transform_rect (ctm, link->rect));
2020 }
2021 qsort (page->slinks, count, slinksize, compareslinks);
2022 }
2023 }
2024
2025 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2026 static void fmt_linkn (char *s, unsigned int u)
2027 {
2028 unsigned int len; unsigned int q;
2029 int zma = 'z' - 'a' + 1;
2030 len = 1; q = u;
2031 while (q > zma - 1) { ++len; q /= zma; }
2032 if (s) {
2033 s += len;
2034 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2035 /* handles u == 0 */
2036 }
2037 s[len] = 0;
2038 }
2039
2040 static void highlightslinks (struct page *page, int xoff, int yoff,
2041 int noff, char *targ, int tlen, int hfsize)
2042 {
2043 int i;
2044 char buf[40];
2045 struct slink *slink;
2046 double x0, y0, x1, y1, w;
2047
2048 ensureslinks (page);
2049 glColor3ub (0xc3, 0xb0, 0x91);
2050 for (i = 0; i < page->slinkcount; ++i) {
2051 fmt_linkn (buf, i + noff);
2052 if (!tlen || !strncmp (targ, buf, tlen)) {
2053 slink = &page->slinks[i];
2054
2055 x0 = slink->bbox.x0 + xoff - 5;
2056 y1 = slink->bbox.y0 + yoff - 5;
2057 y0 = y1 + 10 + hfsize;
2058 w = measure_string (state.face, hfsize, buf);
2059 x1 = x0 + w + 10;
2060 glRectd (x0, y0, x1, y1);
2061 }
2062 }
2063
2064 glEnable (GL_BLEND);
2065 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2066 glEnable (GL_TEXTURE_2D);
2067 glColor3ub (0, 0, 0);
2068 for (i = 0; i < page->slinkcount; ++i) {
2069 fmt_linkn (buf, i + noff);
2070 if (!tlen || !strncmp (targ, buf, tlen)) {
2071 slink = &page->slinks[i];
2072
2073 x0 = slink->bbox.x0 + xoff;
2074 y0 = slink->bbox.y0 + yoff + hfsize;
2075 draw_string (state.face, hfsize, x0, y0, buf);
2076 }
2077 }
2078 glDisable (GL_TEXTURE_2D);
2079 glDisable (GL_BLEND);
2080 }
2081
2082
2083 static void uploadslice (struct tile *tile, struct slice *slice)
2084 {
2085 int offset;
2086 struct slice *slice1;
2087
2088 offset = 0;
2089 for (slice1 = tile->slices; slice != slice1; slice1++) {
2090 offset += slice1->h * tile->w * tile->pixmap->n;
2091 }
2092 if (slice->texindex != -1 && slice->texindex < state.texcount
2093 && state.texowners[slice->texindex].slice == slice) {
2094 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2095 }
2096 else {
2097 int subimage = 0;
2098 int texindex = state.texindex++ % state.texcount;
2099
2100 if (state.texowners[texindex].w == tile->w) {
2101 if (state.texowners[texindex].h >= slice->h) {
2102 subimage = 1;
2103 }
2104 else {
2105 state.texowners[texindex].h = slice->h;
2106 }
2107 }
2108 else {
2109 state.texowners[texindex].h = slice->h;
2110 }
2111
2112 state.texowners[texindex].w = tile->w;
2113 state.texowners[texindex].slice = slice;
2114 slice->texindex = texindex;
2115
2116 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2117 if (subimage) {
2118 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2119 0,
2120 0,
2121 0,
2122 tile->w,
2123 slice->h,
2124 state.texform,
2125 state.texty,
2126 tile->pixmap->samples+offset
2127 );
2128 }
2129 else {
2130 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2131 0,
2132 state.texiform,
2133 tile->w,
2134 slice->h,
2135 0,
2136 state.texform,
2137 state.texty,
2138 tile->pixmap->samples+offset
2139 );
2140 }
2141 }
2142 }
2143
2144 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2145 {
2146 CAMLparam2 (args_v, ptr_v);
2147 int dispx = Int_val (Field (args_v, 0));
2148 int dispy = Int_val (Field (args_v, 1));
2149 int dispw = Int_val (Field (args_v, 2));
2150 int disph = Int_val (Field (args_v, 3));
2151 int tilex = Int_val (Field (args_v, 4));
2152 int tiley = Int_val (Field (args_v, 5));
2153 char *s = String_val (ptr_v);
2154 struct tile *tile = parse_pointer ("ml_drawtile", s);
2155
2156 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2157 {
2158 int slicey, firstslice;
2159 struct slice *slice;
2160
2161 firstslice = tiley / tile->sliceheight;
2162 slice = &tile->slices[firstslice];
2163 slicey = tiley % tile->sliceheight;
2164
2165 while (disph > 0) {
2166 int dh;
2167
2168 dh = slice->h - slicey;
2169 dh = MIN (disph, dh);
2170 uploadslice (tile, slice);
2171
2172 glBegin (GL_QUADS);
2173 {
2174 glTexCoord2i (tilex, slicey);
2175 glVertex2i (dispx, dispy);
2176
2177 glTexCoord2i (tilex+dispw, slicey);
2178 glVertex2i (dispx+dispw, dispy);
2179
2180 glTexCoord2i (tilex+dispw, slicey+dh);
2181 glVertex2i (dispx+dispw, dispy+dh);
2182
2183 glTexCoord2i (tilex, slicey+dh);
2184 glVertex2i (dispx, dispy+dh);
2185 }
2186 glEnd ();
2187
2188 dispy += dh;
2189 disph -= dh;
2190 slice++;
2191 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2192 slicey = 0;
2193 }
2194 }
2195 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2196 CAMLreturn (Val_unit);
2197 }
2198
2199 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2200 value xoff_v, value yoff_v,
2201 value li_v)
2202 {
2203 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2204 int xoff = Int_val (xoff_v);
2205 int yoff = Int_val (yoff_v);
2206 int noff = Int_val (Field (li_v, 0));
2207 char *targ = String_val (Field (li_v, 1));
2208 int tlen = caml_string_length (Field (li_v, 1));
2209 int hfsize = Int_val (Field (li_v, 2));
2210 char *s = String_val (ptr_v);
2211 int hlmask = Int_val (hlinks_v);
2212 struct page *page = parse_pointer ("ml_postprocess", s);
2213
2214 if (!page->u.ptr) {
2215 /* deal with loadpage failed pages */
2216 goto done;
2217 }
2218
2219 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2220 if (trylock ("ml_postprocess")) {
2221 noff = 0;
2222 goto done;
2223 }
2224 if (hlmask & 2) {
2225 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2226 noff = page->slinkcount;
2227 }
2228 showsel (page, xoff, yoff);
2229 unlock ("ml_postprocess");
2230
2231 done:
2232 CAMLreturn (Val_int (noff));
2233 }
2234
2235 static fz_link *getlink (struct page *page, int x, int y)
2236 {
2237 fz_point p;
2238 fz_matrix ctm;
2239 fz_link *link, *links;
2240
2241 switch (page->type) {
2242 case DPDF:
2243 ctm = trimctm (page->u.pdfpage, page->pdimno);
2244 links = page->u.pdfpage->links;
2245 break;
2246
2247 case DXPS:
2248 ctm = fz_identity;
2249 links = page->u.xpspage->links;
2250 break;
2251
2252 default:
2253 return NULL;
2254 }
2255 p.x = x;
2256 p.y = y;
2257
2258 ctm = fz_concat (ctm, state.pagedims[page->pdimno].ctm);
2259 ctm = fz_invert_matrix (ctm);
2260 p = fz_transform_point (ctm, p);
2261
2262 for (link = links; link; link = link->next) {
2263 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2264 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2265 return link;
2266 }
2267 }
2268 }
2269 return NULL;
2270 }
2271
2272 static void ensuretext (struct page *page)
2273 {
2274 if (state.gen != page->tgen) {
2275 droptext (page);
2276 page->tgen = state.gen;
2277 }
2278 if (!page->text) {
2279 fz_device *tdev;
2280
2281 page->text = fz_new_text_page (state.ctx, fz_infinite_rect);
2282 page->sheet = fz_new_text_sheet (state.ctx);
2283 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2284 fz_run_display_list (page->dlist,
2285 tdev,
2286 pagectm (page),
2287 fz_infinite_bbox, NULL);
2288 qsort (page->text->blocks, page->text->len,
2289 sizeof (*page->text->blocks), compareblocks);
2290 fz_free_device (tdev);
2291 }
2292 }
2293
2294 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2295 {
2296 CAMLparam2 (start_page_v, dir_v);
2297 CAMLlocal1 (ret_v);
2298 int i, dir = Int_val (dir_v);
2299 int start_page = Int_val (start_page_v);
2300 int end_page = dir > 0 ? state.pagecount : -1;
2301
2302 ret_v = Val_int (0);
2303 if (!(state.type == DPDF || state.type == DXPS)) {
2304 goto done;
2305 }
2306
2307 lock ("ml_findpage_with_links");
2308 for (i = start_page + dir; i != end_page; i += dir) {
2309 int found;
2310
2311 switch (state.type) {
2312 case DPDF:
2313 {
2314 pdf_page *page = NULL;
2315
2316 fz_try (state.ctx) {
2317 page = pdf_load_page (state.u.pdf, i);
2318 found = !!page->links;
2319 }
2320 fz_catch (state.ctx) {
2321 found = 0;
2322 }
2323 if (page) {
2324 freepdfpage (page);
2325 }
2326 }
2327 break;
2328 case DXPS:
2329 {
2330 xps_page *page = xps_load_page (state.u.xps, i);
2331 found = !!page->links;
2332 freexpspage (page);
2333 }
2334 break;
2335
2336 default:
2337 ARSERT ("invalid document type");
2338 }
2339
2340 if (found) {
2341 ret_v = caml_alloc_small (1, 1);
2342 Field (ret_v, 0) = Val_int (i);
2343 goto unlock;
2344 }
2345 }
2346 unlock:
2347 unlock ("ml_findpage_with_links");
2348
2349 done:
2350 CAMLreturn (ret_v);
2351 }
2352
2353 enum { dir_first, dir_last};
2354 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2355
2356 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2357 {
2358 CAMLparam2 (ptr_v, dir_v);
2359 CAMLlocal2 (ret_v, pos_v);
2360 struct page *page;
2361 int dirtag, i, slinkindex;
2362 struct slink *found = NULL ,*slink;
2363 char *s = String_val (ptr_v);
2364
2365 page = parse_pointer ("ml_findlink", s);
2366 ret_v = Val_int (0);
2367 if (trylock ("ml_findlink")) {
2368 goto done;
2369 }
2370
2371 ensureslinks (page);
2372
2373 if (Is_block (dir_v)) {
2374 dirtag = Tag_val (dir_v);
2375 switch (dirtag) {
2376 case dir_first_visible:
2377 {
2378 int x0, y0, dir, first_index, last_index;
2379
2380 pos_v = Field (dir_v, 0);
2381 x0 = Int_val (Field (pos_v, 0));
2382 y0 = Int_val (Field (pos_v, 1));
2383 dir = Int_val (Field (pos_v, 2));
2384
2385 if (dir >= 0) {
2386 dir = 1;
2387 first_index = 0;
2388 last_index = page->slinkcount;
2389 }
2390 else {
2391 first_index = page->slinkcount - 1;
2392 last_index = -1;
2393 }
2394
2395 for (i = first_index; i != last_index; i += dir) {
2396 slink = &page->slinks[i];
2397 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2398 found = slink;
2399 break;
2400 }
2401 }
2402 }
2403 break;
2404
2405 case dir_left:
2406 slinkindex = Int_val (Field (dir_v, 0));
2407 found = &page->slinks[slinkindex];
2408 for (i = slinkindex - 1; i >= 0; --i) {
2409 slink = &page->slinks[i];
2410 if (slink->bbox.x0 < found->bbox.x0) {
2411 found = slink;
2412 break;
2413 }
2414 }
2415 break;
2416
2417 case dir_right:
2418 slinkindex = Int_val (Field (dir_v, 0));
2419 found = &page->slinks[slinkindex];
2420 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2421 slink = &page->slinks[i];
2422 if (slink->bbox.x0 > found->bbox.x0) {
2423 found = slink;
2424 break;
2425 }
2426 }
2427 break;
2428
2429 case dir_down:
2430 slinkindex = Int_val (Field (dir_v, 0));
2431 found = &page->slinks[slinkindex];
2432 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2433 slink = &page->slinks[i];
2434 if (slink->bbox.y0 >= found->bbox.y0) {
2435 found = slink;
2436 break;
2437 }
2438 }
2439 break;
2440
2441 case dir_up:
2442 slinkindex = Int_val (Field (dir_v, 0));
2443 found = &page->slinks[slinkindex];
2444 for (i = slinkindex - 1; i >= 0; --i) {
2445 slink = &page->slinks[i];
2446 if (slink->bbox.y0 <= found->bbox.y0) {
2447 found = slink;
2448 break;
2449 }
2450 }
2451 break;
2452 }
2453 }
2454 else {
2455 dirtag = Int_val (dir_v);
2456 switch (dirtag) {
2457 case dir_first:
2458 found = page->slinks;
2459 break;
2460
2461 case dir_last:
2462 if (page->slinks) {
2463 found = page->slinks + (page->slinkcount - 1);
2464 }
2465 break;
2466 }
2467 }
2468 if (found) {
2469 ret_v = caml_alloc_small (2, 1);
2470 Field (ret_v, 0) = Val_int (found - page->slinks);
2471 }
2472
2473 unlock ("ml_findlink");
2474 done:
2475 CAMLreturn (ret_v);
2476 }
2477
2478 enum { uuri, ugoto, utext, uunexpected, ulaunch, unamed, uremote };
2479
2480 #define LINKTOVAL \
2481 { \
2482 int pageno; \
2483 \
2484 switch (link->dest.kind) { \
2485 case FZ_LINK_GOTO: \
2486 { \
2487 fz_point p; \
2488 \
2489 pageno = link->dest.ld.gotor.page; \
2490 p.x = 0; \
2491 p.y = 0; \
2492 \
2493 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2494 p.y = link->dest.ld.gotor.lt.y; \
2495 p = fz_transform_point (pdim->lctm, p); \
2496 } \
2497 tup_v = caml_alloc_tuple (2); \
2498 ret_v = caml_alloc_small (1, ugoto); \
2499 Field (tup_v, 0) = Val_int (pageno); \
2500 Field (tup_v, 1) = Val_int (p.y); \
2501 Field (ret_v, 0) = tup_v; \
2502 } \
2503 break; \
2504 \
2505 case FZ_LINK_URI: \
2506 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2507 ret_v = caml_alloc_small (1, uuri); \
2508 Field (ret_v, 0) = str_v; \
2509 break; \
2510 \
2511 case FZ_LINK_LAUNCH: \
2512 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2513 ret_v = caml_alloc_small (1, ulaunch); \
2514 Field (ret_v, 0) = str_v; \
2515 break; \
2516 \
2517 case FZ_LINK_NAMED: \
2518 str_v = caml_copy_string (link->dest.ld.named.named); \
2519 ret_v = caml_alloc_small (1, unamed); \
2520 Field (ret_v, 0) = str_v; \
2521 break; \
2522 \
2523 case FZ_LINK_GOTOR: \
2524 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2525 pageno = link->dest.ld.gotor.page; \
2526 tup_v = caml_alloc_tuple (2); \
2527 ret_v = caml_alloc_small (1, uremote); \
2528 Field (tup_v, 0) = str_v; \
2529 Field (tup_v, 1) = Val_int (pageno); \
2530 Field (ret_v, 0) = tup_v; \
2531 break; \
2532 \
2533 default: \
2534 { \
2535 char buf[80]; \
2536 \
2537 snprintf (buf, sizeof (buf), \
2538 "unhandled link kind %d", link->dest.kind); \
2539 str_v = caml_copy_string (buf); \
2540 ret_v = caml_alloc_small (1, uunexpected); \
2541 Field (ret_v, 0) = str_v; \
2542 } \
2543 break; \
2544 } \
2545 }
2546
2547 CAMLprim value ml_getlink (value ptr_v, value n_v)
2548 {
2549 CAMLparam2 (ptr_v, n_v);
2550 CAMLlocal3 (ret_v, tup_v, str_v);
2551 fz_link *link;
2552 struct page *page;
2553 struct pagedim *pdim;
2554 char *s = String_val (ptr_v);
2555
2556 ret_v = Val_int (0);
2557 if (trylock ("ml_getlink")) {
2558 goto done;
2559 }
2560
2561 page = parse_pointer ("ml_getlink", s);
2562 ensureslinks (page);
2563 pdim = &state.pagedims[page->pdimno];
2564 link = page->slinks[Int_val (n_v)].link;
2565 LINKTOVAL;
2566
2567 unlock ("ml_getlink");
2568 done:
2569 CAMLreturn (ret_v);
2570 }
2571
2572 CAMLprim value ml_getlinkcount (value ptr_v)
2573 {
2574 CAMLparam1 (ptr_v);
2575 struct page *page;
2576 char *s = String_val (ptr_v);
2577
2578 page = parse_pointer ("ml_getlinkcount", s);
2579 CAMLreturn (Val_int (page->slinkcount));
2580 }
2581
2582 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
2583 {
2584 CAMLparam2 (ptr_v, n_v);
2585 CAMLlocal1 (ret_v);
2586 struct page *page;
2587 struct slink *slink;
2588 char *s = String_val (ptr_v);
2589
2590 page = parse_pointer ("ml_getlinkrect", s);
2591 ret_v = caml_alloc_tuple (4);
2592 if (trylock ("ml_getlinkrect")) {
2593 Field (ret_v, 0) = Val_int (0);
2594 Field (ret_v, 1) = Val_int (0);
2595 Field (ret_v, 2) = Val_int (0);
2596 Field (ret_v, 3) = Val_int (0);
2597 goto done;
2598 }
2599 ensureslinks (page);
2600
2601 slink = &page->slinks[Int_val (n_v)];
2602 Field (ret_v, 0) = Val_int (slink->bbox.x0);
2603 Field (ret_v, 1) = Val_int (slink->bbox.y0);
2604 Field (ret_v, 2) = Val_int (slink->bbox.x1);
2605 Field (ret_v, 3) = Val_int (slink->bbox.y1);
2606 unlock ("ml_getlinkrect");
2607
2608 done:
2609 CAMLreturn (ret_v);
2610 }
2611
2612 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
2613 {
2614 CAMLparam3 (ptr_v, x_v, y_v);
2615 CAMLlocal3 (ret_v, tup_v, str_v);
2616 fz_link *link;
2617 struct page *page;
2618 char *s = String_val (ptr_v);
2619 int x = Int_val (x_v), y = Int_val (y_v);
2620 struct pagedim *pdim;
2621
2622 ret_v = Val_int (0);
2623 if (trylock ("ml_whatsunder")) {
2624 goto done;
2625 }
2626
2627 page = parse_pointer ("ml_whatsunder", s);
2628 pdim = &state.pagedims[page->pdimno];
2629 x += pdim->bounds.x0;
2630 y += pdim->bounds.y0;
2631 link = getlink (page, x, y);
2632 if (link) {
2633 LINKTOVAL;
2634 }
2635 else {
2636 fz_rect *b;
2637 fz_text_block *block;
2638
2639 ensuretext (page);
2640 for (block = page->text->blocks;
2641 block < page->text->blocks + page->text->len;
2642 ++block) {
2643 fz_text_line *line;
2644
2645 b = &block->bbox;
2646 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2647 continue;
2648
2649 for (line = block->lines;
2650 line < block->lines + block->len;
2651 ++line) {
2652 fz_text_span *span;
2653
2654 b = &line->bbox;
2655 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2656 continue;
2657
2658 for (span = line->spans;
2659 span < line->spans + line->len;
2660 ++span) {
2661 fz_text_char *ch;
2662
2663 b = &span->bbox;
2664 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2665 continue;
2666
2667 for (ch = span->text; ch < span->text + span->len; ++ch) {
2668 b = &ch->bbox;
2669
2670 if (x >= b->x0 && x <= b->x1
2671 && y >= b->y0 && y <= b->y1) {
2672 const char *n2 =
2673 span->style->font && span->style->font->name
2674 ? span->style->font->name
2675 : "Span has no font name"
2676 ;
2677 FT_FaceRec *face = span->style->font->ft_face;
2678 if (face && face->family_name) {
2679 char *s;
2680 char *n1 = face->family_name;
2681 size_t l1 = strlen (n1);
2682 size_t l2 = strlen (n2);
2683
2684 if (l1 != l2 || memcmp (n1, n2, l1)) {
2685 s = malloc (l1 + l2 + 2);
2686 if (s) {
2687 memcpy (s, n2, l2);
2688 s[l2] = '=';
2689 memcpy (s + l2 + 1, n1, l1 + 1);
2690 str_v = caml_copy_string (s);
2691 free (s);
2692 }
2693 }
2694 }
2695 if (str_v == 0) {
2696 str_v = caml_copy_string (n2);
2697 }
2698 ret_v = caml_alloc_small (1, utext);
2699 Field (ret_v, 0) = str_v;
2700 goto unlock;
2701 }
2702 }
2703 }
2704 }
2705 }
2706 }
2707 unlock:
2708 unlock ("ml_whatsunder");
2709
2710 done:
2711 CAMLreturn (ret_v);
2712 }
2713
2714 CAMLprim value ml_seltext (value ptr_v, value rect_v)
2715 {
2716 CAMLparam2 (ptr_v, rect_v);
2717 fz_rect *b;
2718 struct page *page;
2719 struct pagedim *pdim;
2720 int i, x0, x1, y0, y1;
2721 char *s = String_val (ptr_v);
2722 int fi = 0, li = 0;
2723 fz_text_block *block;
2724 fz_text_span *span, *fspan, *lspan;
2725 fz_text_line *line, *fline = NULL, *lline = NULL;
2726
2727 if (trylock ("ml_seltext")) {
2728 goto done;
2729 }
2730
2731 page = parse_pointer ("ml_seltext", s);
2732 ensuretext (page);
2733
2734 pdim = &state.pagedims[page->pdimno];
2735 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;;
2736 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
2737 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
2738 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
2739
2740 if (0) {
2741 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2742 glColor3ub (128, 128, 128);
2743 glRecti (x0, y0, x1, y1);
2744 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2745 }
2746
2747 fspan = lspan = NULL;
2748
2749 for (block = page->text->blocks;
2750 block < page->text->blocks + page->text->len;
2751 ++block) {
2752 for (line = block->lines;
2753 line < block->lines + block->len;
2754 ++line) {
2755 for (span = line->spans;
2756 span < line->spans + line->len;
2757 ++span) {
2758 for (i = 0; i < span->len; ++i) {
2759 b = &span->text[i].bbox;
2760 int selected = 0;
2761
2762 if (x0 >= b->x0 && x0 <= b->x1
2763 && y0 >= b->y0 && y0 <= b->y1) {
2764 fspan = span;
2765 fline = line;
2766 fi = i;
2767 selected = 1;
2768 }
2769 if (x1 >= b->x0 && x1 <= b->x1
2770 && y1 >= b->y0 && y1 <= b->y1) {
2771 lspan = span;
2772 lline = line;
2773 li = i;
2774 selected = 1;
2775 }
2776 if (0 && selected) {
2777 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2778 glColor3ub (128, 128, 128);
2779 glRecti (b->x0, b->y0, b->x1, b->y1);
2780 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2781 }
2782 }
2783 }
2784 }
2785 }
2786 if (y1 < y0 || x1 < x0) {
2787 int swap = 0;
2788
2789 if (fspan == lspan) {
2790 swap = 1;
2791 }
2792 else {
2793 if (y1 < y0) {
2794 if (fline != lline) {
2795 swap = 1;
2796 }
2797 }
2798 }
2799
2800 if (swap) {
2801 i = fi;
2802 span = fspan;
2803
2804 fi = li;
2805 fspan = lspan;
2806
2807 li = i;
2808 lspan = span;
2809 }
2810 }
2811
2812 page->fmark.i = fi;
2813 page->fmark.span = fspan;
2814
2815 page->lmark.i = li;
2816 page->lmark.span = lspan;
2817
2818 unlock ("ml_seltext");
2819
2820 done:
2821 CAMLreturn (Val_unit);
2822 }
2823
2824 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
2825 {
2826 char buf[4];
2827 int i, len, ret;
2828
2829 for (i = a; i <= b; ++i) {
2830 len = fz_runetochar (buf, span->text[i].c);
2831 ret = fwrite (buf, len, 1, f);
2832
2833 if (ret != 1) {
2834 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
2835 len, ret, strerror (errno));
2836 return -1;
2837 }
2838 }
2839 return 0;
2840 }
2841
2842 #ifdef __CYGWIN__
2843 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
2844 {
2845 caml_failwith ("ml_popen not implemented under Cygwin");
2846 }
2847 #else
2848 CAMLprim value ml_popen (value command_v, value fds_v)
2849 {
2850 CAMLparam2 (command_v, fds_v);
2851 CAMLlocal2 (l_v, tup_v);
2852 int ret;
2853 char *msg = NULL;
2854 value earg_v = Nothing;
2855 posix_spawnattr_t attr;
2856 posix_spawn_file_actions_t fa;
2857 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
2858
2859 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
2860 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
2861 }
2862
2863 if ((ret = posix_spawnattr_init (&attr)) != 0) {
2864 msg = "posix_spawnattr_init";
2865 goto fail1;
2866 }
2867
2868 #ifdef POSIX_SPAWN_USEVFORK
2869 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
2870 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
2871 goto fail;
2872 }
2873 #endif
2874
2875 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
2876 int fd1, fd2;
2877
2878 tup_v = Field (l_v, 0);
2879 fd1 = Int_val (Field (tup_v, 0));
2880 fd2 = Int_val (Field (tup_v, 1));
2881 if (fd2 < 0) {
2882 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
2883 msg = "posix_spawn_file_actions_addclose";
2884 earg_v = tup_v;
2885 goto fail;
2886 }
2887 }
2888 else {
2889 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
2890 msg = "posix_spawn_file_actions_adddup2";
2891 earg_v = tup_v;
2892 goto fail;
2893 }
2894 }
2895 }
2896
2897 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
2898 msg = "posix_spawn";
2899 goto fail;
2900 }
2901
2902 fail:
2903 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
2904 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
2905 }
2906
2907 fail1:
2908 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
2909 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
2910 strerror (ret));
2911 }
2912
2913 if (msg)
2914 unix_error (ret, msg, earg_v);
2915
2916 CAMLreturn (Val_unit);
2917 }
2918 #endif
2919
2920 CAMLprim value ml_copysel (value fd_v, value ptr_v)
2921 {
2922 CAMLparam1 (ptr_v);
2923 FILE *f;
2924 int seen = 0;
2925 struct page *page;
2926 fz_text_line *line;
2927 fz_text_span *span;
2928 fz_text_block *block;
2929 int fd = Int_val (fd_v);
2930 char *s = String_val (ptr_v);
2931
2932 if (trylock ("ml_copysel")) {
2933 goto done;
2934 }
2935
2936 page = parse_pointer ("ml_sopysel", s);
2937
2938 if (!page->fmark.span || !page->lmark.span) {
2939 fprintf (stderr, "nothing to copy\n");
2940 goto unlock;
2941 }
2942
2943 f = fdopen (fd, "w");
2944 if (!f) {
2945 fprintf (stderr, "failed to fopen sel pipe: %s\n",
2946 strerror (errno));
2947 f = stdout;
2948 }
2949
2950 for (block = page->text->blocks;
2951 block < page->text->blocks + page->text->len;
2952 ++block) {
2953 for (line = block->lines;
2954 line < block->lines + block->len;
2955 ++line) {
2956 for (span = line->spans;
2957 span < line->spans + line->len;
2958 ++span) {
2959 int a, b;
2960
2961 seen |= span == page->fmark.span || span == page->lmark.span;
2962 a = span == page->fmark.span ? page->fmark.i : 0;
2963 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
2964
2965 if (seen) {
2966 if (pipespan (f, span, a, b)) {
2967 goto close;
2968 }
2969 if (span == line->spans + line->len - 1) {
2970 if (putc ('\n', f) == EOF) {
2971 fprintf (stderr,
2972 "failed break line on sel pipe: %s\n",
2973 strerror (errno));
2974 goto close;
2975 }
2976 }
2977 if (span == page->lmark.span) {
2978 goto endloop;
2979 }
2980 }
2981 }
2982 }
2983 }
2984 endloop:
2985 page->lmark.span = NULL;
2986 page->fmark.span = NULL;
2987
2988 close:
2989 if (f != stdout) {
2990 int ret = fclose (f);
2991 fd = -1;
2992 if (ret == -1) {
2993 if (errno != ECHILD) {
2994 fprintf (stderr, "failed to close sel pipe: %s\n",
2995 strerror (errno));
2996 }
2997 }
2998 }
2999 unlock:
3000 unlock ("ml_copysel");
3001
3002 done:
3003 if (fd >= 0) {
3004 if (close (fd)) {
3005 fprintf (stderr, "failed to close sel pipe: %s\n",
3006 strerror (errno));
3007 }
3008 }
3009 CAMLreturn (Val_unit);
3010 }
3011
3012 CAMLprim value ml_getpdimrect (value pagedimno_v)
3013 {
3014 CAMLparam1 (pagedimno_v);
3015 CAMLlocal1 (ret_v);
3016 int pagedimno = Int_val (pagedimno_v);
3017 fz_rect box;
3018
3019 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3020 if (trylock ("ml_getpdimrect")) {
3021 box = fz_empty_rect;
3022 }
3023 else {
3024 box = state.pagedims[pagedimno].mediabox;
3025 unlock ("ml_getpdimrect");
3026 }
3027
3028 Store_double_field (ret_v, 0, box.x0);
3029 Store_double_field (ret_v, 1, box.x1);
3030 Store_double_field (ret_v, 2, box.y0);
3031 Store_double_field (ret_v, 3, box.y1);
3032
3033 CAMLreturn (ret_v);
3034 }
3035
3036 static double getmaxw (void)
3037 {
3038 int i;
3039 struct pagedim *p;
3040 double maxw = 0.0;
3041
3042 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3043 double x0, x1, w;
3044
3045 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
3046 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
3047
3048 w = x1 - x0;
3049 maxw = MAX (w, maxw);
3050 }
3051 return maxw;
3052 }
3053
3054 CAMLprim value ml_getmaxw (value unit_v)
3055 {
3056 CAMLparam1 (unit_v);
3057 CAMLlocal1 (ret_v);
3058 double maxw = 0.0;
3059
3060 if (trylock ("ml_getmaxw")) {
3061 goto done;
3062 }
3063 maxw = getmaxw ();
3064 unlock ("ml_getmaxw");
3065 done:
3066 ret_v = caml_copy_double (maxw);
3067 CAMLreturn (ret_v);
3068 }
3069
3070 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3071 value dw_v, value cols_v)
3072 {
3073 CAMLparam3 (winw_v, winh_v, dw_v);
3074 CAMLlocal1 (ret_v);
3075 int i;
3076 double zoom = 1.0;
3077 double maxw = 0.0, maxh = 0.0;
3078 struct pagedim *p;
3079 double winw = Int_val (winw_v);
3080 double winh = Int_val (winh_v);
3081 double dw = Int_val (dw_v);
3082 double cols = Int_val (cols_v);
3083 double pw = 1.0, ph = 1.0, aspect;
3084
3085 if (trylock ("ml_zoom_for_height")) {
3086 goto done;
3087 }
3088
3089 if (state.proportional) {
3090 maxw = getmaxw () / cols;
3091 }
3092
3093 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3094 double x0, x1, y0, y1, w, h, scaledh, scale;
3095 fz_rect rect;
3096
3097 rect = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
3098 p->mediabox);
3099 x0 = MIN (rect.x0, rect.x1);
3100 x1 = MAX (rect.x0, rect.x1);
3101 y0 = MIN (rect.y0, rect.y1);
3102 y1 = MAX (rect.y0, rect.y1);
3103
3104 w = (x1 - x0) / cols;
3105 h = y1 - y0;
3106
3107 if (state.proportional) {
3108 scale = w / maxw;
3109 scaledh = h * scale;
3110 }
3111 else {
3112 scale = 1.0;
3113 scaledh = h;
3114 }
3115
3116 if (scaledh > maxh) {
3117 maxh = scaledh;
3118 ph = scaledh;
3119 pw = w * scale;
3120 }
3121 }
3122
3123 aspect = pw / ph;
3124 zoom = (winh * aspect + dw) / winw;
3125
3126 unlock ("ml_zoom_for_height");
3127 done:
3128 ret_v = caml_copy_double (zoom);
3129 CAMLreturn (ret_v);
3130 }
3131
3132 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3133 {
3134 CAMLparam4 (pt_v, x_v, y_v, string_v);
3135 CAMLlocal1 (ret_v);
3136 int pt = Int_val(pt_v);
3137 int x = Int_val (x_v);
3138 int y = Int_val (y_v);
3139 double w;
3140
3141 w = draw_string (state.face, pt, x, y, String_val (string_v));
3142 ret_v = caml_copy_double (w);
3143 CAMLreturn (ret_v);
3144 }
3145
3146 CAMLprim value ml_measure_string (value pt_v, value string_v)
3147 {
3148 CAMLparam2 (pt_v, string_v);
3149 CAMLlocal1 (ret_v);
3150 int pt = Int_val (pt_v);
3151 double w;
3152
3153 w = measure_string (state.face, pt, String_val (string_v));
3154 ret_v = caml_copy_double (w);
3155 CAMLreturn (ret_v);
3156 }
3157
3158 CAMLprim value ml_getpagebox (value opaque_v)
3159 {
3160 CAMLparam1 (opaque_v);
3161 CAMLlocal1 (ret_v);
3162 fz_bbox bbox;
3163 fz_device *dev;
3164 char *s = String_val (opaque_v);
3165 struct page *page = parse_pointer ("ml_getpagebox", s);
3166
3167 ret_v = caml_alloc_tuple (4);
3168 dev = fz_new_bbox_device (state.ctx, &bbox);
3169 dev->hints |= FZ_IGNORE_SHADE;
3170
3171 switch (page->type) {
3172 case DPDF:
3173 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, pagectm (page), NULL);
3174 break;
3175
3176 case DXPS:
3177 xps_run_page (state.u.xps, page->u.xpspage, dev, pagectm (page), NULL);
3178 break;
3179
3180 default:
3181 bbox = fz_infinite_bbox;
3182 break;
3183 }
3184
3185 fz_free_device (dev);
3186 Field (ret_v, 0) = Val_int (bbox.x0);
3187 Field (ret_v, 1) = Val_int (bbox.y0);
3188 Field (ret_v, 2) = Val_int (bbox.x1);
3189 Field (ret_v, 3) = Val_int (bbox.y1);
3190
3191 CAMLreturn (ret_v);
3192 }
3193
3194 CAMLprim value ml_setaalevel (value level_v)
3195 {
3196 CAMLparam1 (level_v);
3197
3198 state.aalevel = Int_val (level_v);
3199 CAMLreturn (Val_unit);
3200 }
3201
3202 #undef pixel
3203 #include <X11/Xlib.h>
3204 #include <GL/glx.h>
3205
3206 static struct {
3207 Display *dpy;
3208 GLXContext ctx;
3209 GLXDrawable drawable;
3210 } glx;
3211
3212 #include "keysym2ucs.c"
3213
3214 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3215 {
3216 CAMLparam1 (keysym_v);
3217 CAMLlocal1 (str_v);
3218 KeySym keysym = Int_val (keysym_v);
3219 Rune rune;
3220 int len;
3221 char buf[5];
3222
3223 rune = keysym2ucs (keysym);
3224 len = fz_runetochar (buf, rune);
3225 buf[len] = 0;
3226 str_v = caml_copy_string (buf);
3227 CAMLreturn (str_v);
3228 }
3229
3230 CAMLprim value ml_glx (value win_v)
3231 {
3232 CAMLparam1 (win_v);
3233 XVisualInfo *visual;
3234 int screen, wid = Int_val (win_v);
3235 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3236
3237 glx.dpy = XOpenDisplay (NULL);
3238 if (!glx.dpy) {
3239 caml_failwith ("XOpenDisplay");
3240 }
3241
3242 screen = DefaultScreen (glx.dpy);
3243 visual = glXChooseVisual (glx.dpy, screen, attributes);
3244 if (!visual) {
3245 XCloseDisplay (glx.dpy);
3246 glx.dpy = NULL;
3247 caml_failwith ("glXChooseVisual");
3248 }
3249
3250 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3251 XFree (visual);
3252 if (!glx.ctx) {
3253 XCloseDisplay (glx.dpy);
3254 glx.dpy = NULL;
3255 caml_failwith ("glXCreateContext");
3256 }
3257
3258 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3259 glXDestroyContext (glx.dpy, glx.ctx);
3260 XCloseDisplay (glx.dpy);
3261 glx.dpy = NULL;
3262 glx.ctx = NULL;
3263 caml_failwith ("glXMakeCurrent");
3264 }
3265 glx.drawable = wid;
3266 CAMLreturn (Val_unit);
3267 }
3268
3269 CAMLprim value ml_swapb (value unit_v)
3270 {
3271 CAMLparam1 (unit_v);
3272 glXSwapBuffers (glx.dpy, glx.drawable);
3273 CAMLreturn (Val_unit);
3274 }
3275
3276 CAMLprim value ml_glxsync (value unit_v)
3277 {
3278 CAMLparam1 (unit_v);
3279 if (glx.dpy && glx.ctx) {
3280 glXWaitX ();
3281 glXWaitGL ();
3282 }
3283 CAMLreturn (Val_unit);
3284 }
3285
3286 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3287 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3288
3289 CAMLprim value ml_platform (value unit_v)
3290 {
3291 CAMLparam1 (unit_v);
3292 int platid = piunknown;
3293
3294 #if defined __linux__
3295 platid = pilinux;
3296 #elif defined __CYGWIN__
3297 platid = picygwin;
3298 #elif defined __DragonFly__
3299 platid = pidragonflybsd;
3300 #elif defined __FreeBSD__
3301 platid = pifreebsd;
3302 #elif defined __OpenBSD__
3303 platid = piopenbsd;
3304 #elif defined __NetBSD__
3305 platid = pinetbsd;
3306 #elif defined __sun__
3307 platid = pisun;
3308 #elif defined __APPLE__
3309 platid = piosx;
3310 #endif
3311 CAMLreturn (Val_int (platid));
3312 }
3313
3314 CAMLprim value ml_cloexec (value fd_v)
3315 {
3316 CAMLparam1 (fd_v);
3317 int fd = Int_val (fd_v);
3318
3319 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
3320 uerror ("fcntl", Nothing);
3321 }
3322 CAMLreturn (Val_unit);
3323 }
3324
3325 CAMLprim value ml_init (value pipe_v, value params_v)
3326 {
3327 CAMLparam2 (pipe_v, params_v);
3328 CAMLlocal2 (trim_v, fuzz_v);
3329 int ret;
3330 int texcount;
3331 char *fontpath;
3332 int colorspace;
3333 int mustoresize;
3334 struct sigaction sa;
3335
3336 state.cr = Int_val (Field (pipe_v, 0));
3337 state.cw = Int_val (Field (pipe_v, 1));
3338 state.rotate = Int_val (Field (params_v, 0));
3339 state.proportional = Bool_val (Field (params_v, 1));
3340 trim_v = Field (params_v, 2);
3341 texcount = Int_val (Field (params_v, 3));
3342 state.sliceheight = Int_val (Field (params_v, 4));
3343 mustoresize = Int_val (Field (params_v, 5));
3344 colorspace = Int_val (Field (params_v, 6));
3345 fontpath = String_val (Field (params_v, 7));
3346 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
3347
3348 state.ctx = fz_new_context (NULL, NULL, mustoresize);
3349
3350 state.trimmargins = Bool_val (Field (trim_v, 0));
3351 fuzz_v = Field (trim_v, 1);
3352 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
3353 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
3354 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
3355 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
3356
3357 set_tex_params (colorspace);
3358
3359 if (*fontpath) {
3360 state.face = load_font (fontpath);
3361 }
3362 else {
3363 unsigned int len;
3364 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
3365
3366 state.face = load_builtin_font (base, len);
3367 }
3368 if (!state.face) _exit (1);
3369
3370 realloctexts (texcount);
3371
3372 #ifdef __CYGWIN__
3373 sa.sa_handler = SIG_IGN;
3374 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
3375 #else
3376 sa.sa_handler = SIG_DFL;
3377 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
3378 #endif
3379 if (sigemptyset (&sa.sa_mask)) {
3380 err (1, "sigemptyset");
3381 }
3382 if (sigaction (SIGCHLD, &sa, NULL)) {
3383 err (1, "sigaction");
3384 }
3385
3386 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
3387 if (ret) {
3388 errx (1, "pthread_create: %s", strerror (ret));
3389 }
3390
3391 CAMLreturn (Val_unit);
3392 }
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