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[llpp.git] / link.c
blob53d7415c5285b791d6753eb483ab76228f121157
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 <stdarg.h>
24 #include <limits.h>
25 #include <inttypes.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 <mupdf/fitz.h>
35 #include <mupdf/cbz.h>
36 #include <mupdf/pdf.h>
37 #include <mupdf/xps.h>
38 #include <mupdf/img.h>
39
40 #include <ft2build.h>
41 #include FT_FREETYPE_H
42
43 #ifdef USE_FONTCONFIG
44 #include <fontconfig/fontconfig.h>
45 #endif
46
47 #define PIGGYBACK
48 #define SUMATRA_LOOKUP
49
50 #ifndef __USE_GNU
51 extern char **environ;
52 #endif
53
54 #define MIN(a,b) ((a) < (b) ? (a) : (b))
55 #define MAX(a,b) ((a) > (b) ? (a) : (b))
56
57 #if defined __GNUC__
58 #define NORETURN_ATTR __attribute__ ((noreturn))
59 #define UNUSED_ATTR __attribute__ ((unused))
60 #if !defined __clang__
61 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
62 #else
63 #define OPTIMIZE_ATTR(n)
64 #endif
65 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
66 #else
67 #define NORETURN_ATTR
68 #define UNUSED_ATTR
69 #define OPTIMIZE_ATTR(n)
70 #define GCC_FMT_ATTR(a, b)
71 #endif
72
73 #define FMT_s "zu"
74
75 #define FMT_ptr PRIxPTR
76 #define SCN_ptr SCNxPTR
77 #define FMT_ptr_cast(p) ((uintptr_t) (p))
78 #define SCN_ptr_cast(p) ((uintptr_t *) (p))
79
80 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
81 err (int exitcode, const char *fmt, ...)
82 {
83 va_list ap;
84 int savederrno;
85
86 savederrno = errno;
87 va_start (ap, fmt);
88 vfprintf (stderr, fmt, ap);
89 va_end (ap);
90 fprintf (stderr, ": %s\n", strerror (savederrno));
91 fflush (stderr);
92 _exit (exitcode);
93 }
94
95 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
96 errx (int exitcode, const char *fmt, ...)
97 {
98 va_list ap;
99
100 va_start (ap, fmt);
101 vfprintf (stderr, fmt, ap);
102 va_end (ap);
103 fputc ('\n', stderr);
104 fflush (stderr);
105 _exit (exitcode);
106 }
107
108 #ifndef GL_TEXTURE_RECTANGLE_ARB
109 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
110 #endif
111
112 #ifndef GL_BGRA
113 #define GL_BGRA 0x80E1
114 #endif
115
116 #ifndef GL_UNSIGNED_INT_8_8_8_8
117 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
118 #endif
119
120 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
121 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
122 #endif
123
124 #if 0
125 #define lprintf printf
126 #else
127 #define lprintf(...)
128 #endif
129
130 #define ARSERT(cond) for (;;) { \
131 if (!(cond)) { \
132 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
133 } \
134 break; \
135 }
136
137 struct slice {
138 int h;
139 int texindex;
140 };
141
142 struct tile {
143 int w, h;
144 int slicecount;
145 int sliceheight;
146 struct pbo *pbo;
147 fz_pixmap *pixmap;
148 struct slice slices[1];
149 };
150
151 struct pagedim {
152 int pageno;
153 int rotate;
154 int left;
155 int tctmready;
156 fz_irect bounds;
157 fz_rect pagebox;
158 fz_rect mediabox;
159 fz_matrix ctm, zoomctm, lctm, tctm;
160 };
161
162 struct slink {
163 fz_irect bbox;
164 fz_link *link;
165 };
166
167 enum { DPDF, DXPS, DCBZ, DIMG };
168
169 struct page {
170 int tgen;
171 int sgen;
172 int type;
173 int pageno;
174 int pdimno;
175 fz_text_page *text;
176 fz_text_sheet *sheet;
177 union {
178 void *ptr;
179 pdf_page *pdfpage;
180 xps_page *xpspage;
181 cbz_page *cbzpage;
182 image_page *imgpage;
183 } u;
184 fz_display_list *dlist;
185 int slinkcount;
186 struct slink *slinks;
187 struct mark {
188 int i;
189 fz_text_span *span;
190 } fmark, lmark;
191 void (*freepage) (void *);
192 };
193
194 struct {
195 int type;
196 int sliceheight;
197 struct pagedim *pagedims;
198 int pagecount;
199 int pagedimcount;
200 union {
201 pdf_document *pdf;
202 xps_document *xps;
203 cbz_document *cbz;
204 image_document *img;
205 } u;
206 fz_context *ctx;
207 int w, h;
208
209 int texindex;
210 int texcount;
211 GLuint *texids;
212
213 GLenum texiform;
214 GLenum texform;
215 GLenum texty;
216
217 fz_colorspace *colorspace;
218
219 struct {
220 int w, h;
221 struct slice *slice;
222 } *texowners;
223
224 int rotate;
225 enum { FitWidth, FitProportional, FitPage } fitmodel;
226 int trimmargins;
227 int needoutline;
228 int gen;
229 int aalevel;
230
231 int trimanew;
232 fz_irect trimfuzz;
233 fz_pixmap *pig;
234
235 pthread_t thread;
236 int csock;
237 FT_Face face;
238
239 void (*closedoc) (void);
240 void (*freepage) (void *);
241
242 char *trimcachepath;
243 int cxack;
244
245 GLuint stid;
246
247 int pbo_usable;
248 void (*glBindBufferARB) (GLenum, GLuint);
249 GLboolean (*glUnmapBufferARB) (GLenum);
250 void *(*glMapBufferARB) (GLenum, GLenum);
251 void (*glBufferDataARB) (GLenum, GLsizei, void *, GLenum);
252 void (*glGenBuffersARB) (GLsizei, GLuint *);
253 void (*glDeleteBuffersARB) (GLsizei, GLuint *);
254
255 GLfloat texcoords[8];
256 GLfloat vertices[16];
257
258 #ifdef SUMATRA_LOOKUP
259 struct {
260 int count;
261 pdf_obj **objs;
262 pdf_document *pdf;
263 } pdflut;
264 #endif
265 } state;
266
267 struct pbo {
268 GLuint id;
269 void *ptr;
270 size_t size;
271 };
272
273 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
274 {
275 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
276 }
277
278 static void UNUSED_ATTR debug_bbox (const char *cap, fz_irect r)
279 {
280 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
281 }
282
283 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
284 {
285 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
286 m.a, m.b, m.c, m.d, m.e, m.f);
287 }
288
289 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
290
291 static void lock (const char *cap)
292 {
293 int ret = pthread_mutex_lock (&mutex);
294 if (ret) {
295 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
296 }
297 }
298
299 static void unlock (const char *cap)
300 {
301 int ret = pthread_mutex_unlock (&mutex);
302 if (ret) {
303 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
304 }
305 }
306
307 static int trylock (const char *cap)
308 {
309 int ret = pthread_mutex_trylock (&mutex);
310 if (ret && ret != EBUSY) {
311 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
312 }
313 return ret == EBUSY;
314 }
315
316 static void *parse_pointer (const char *cap, const char *s)
317 {
318 int ret;
319 void *ptr;
320
321 ret = sscanf (s, "%" SCN_ptr, SCN_ptr_cast (&ptr));
322 if (ret != 1) {
323 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
324 }
325 return ptr;
326 }
327
328 static double now (void)
329 {
330 struct timeval tv;
331
332 if (gettimeofday (&tv, NULL)) {
333 err (1, "gettimeofday");
334 }
335 return tv.tv_sec + tv.tv_usec*1e-6;
336 }
337
338 static int hasdata (void)
339 {
340 int ret, avail;
341 ret = ioctl (state.csock, FIONREAD, &avail);
342 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
343 return avail > 0;
344 }
345
346 CAMLprim value ml_hasdata (value fd_v)
347 {
348 CAMLparam1 (fd_v);
349 int ret, avail;
350
351 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
352 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
353 CAMLreturn (Val_bool (avail > 0));
354 }
355
356 static void readdata (void *p, int size)
357 {
358 ssize_t n;
359
360 again:
361 n = read (state.csock, p, size);
362 if (n < 0) {
363 if (errno == EINTR) goto again;
364 err (1, "read (req %d, ret %zd)", size, n);
365 }
366 if (n - size) {
367 if (!n) errx (1, "EOF while reading");
368 errx (1, "read (req %d, ret %zd)", size, n);
369 }
370 }
371
372 static void writedata (char *p, int size)
373 {
374 ssize_t n;
375
376 p[0] = (size >> 24) & 0xff;
377 p[1] = (size >> 16) & 0xff;
378 p[2] = (size >> 8) & 0xff;
379 p[3] = (size >> 0) & 0xff;
380
381 n = write (state.csock, p, size + 4);
382 if (n - size - 4) {
383 if (!n) errx (1, "EOF while writing data");
384 err (1, "write (req %d, ret %zd)", size + 4, n);
385 }
386 }
387
388 static int readlen (void)
389 {
390 unsigned char p[4];
391
392 readdata (p, 4);
393 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
394 }
395
396 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
397 {
398 int size = 200, len;
399 va_list ap;
400 char *buf;
401
402 buf = malloc (size);
403 for (;;) {
404 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
405
406 va_start (ap, fmt);
407 len = vsnprintf (buf + 4, size - 4, fmt, ap);
408 va_end (ap);
409
410 if (len > -1) {
411 if (len < size - 4) {
412 writedata (buf, len);
413 break;
414 }
415 else size = len + 5;
416 }
417 else {
418 err (1, "vsnprintf for `%s' failed", fmt);
419 }
420 buf = realloc (buf, size);
421 }
422 free (buf);
423 }
424
425 static void closepdf (void)
426 {
427 #ifdef SUMATRA_LOOKUP
428 if (state.pdflut.objs) {
429 int i;
430
431 for (i = 0; i < state.pdflut.count; ++i) {
432 pdf_drop_obj (state.pdflut.objs[i]);
433 }
434 free (state.pdflut.objs);
435 state.pdflut.objs = NULL;
436 }
437 #endif
438
439 if (state.u.pdf) {
440 pdf_close_document (state.u.pdf);
441 state.u.pdf = NULL;
442 }
443 }
444
445 static void closexps (void)
446 {
447 if (state.u.xps) {
448 xps_close_document (state.u.xps);
449 state.u.xps = NULL;
450 }
451 }
452
453 static void closecbz (void)
454 {
455 if (state.u.cbz) {
456 cbz_close_document (state.u.cbz);
457 state.u.cbz = NULL;
458 }
459 }
460
461 static void closeimg (void)
462 {
463 if (state.u.img) {
464 image_close_document (state.u.img);
465 state.u.img = NULL;
466 }
467 }
468
469 static void freepdfpage (void *ptr)
470 {
471 pdf_free_page (state.u.pdf, ptr);
472 }
473
474 static void freeemptyxxxpage (void *ptr)
475 {
476 (void) ptr;
477 }
478
479 static void freexpspage (void *ptr)
480 {
481 xps_free_page (state.u.xps, ptr);
482 }
483
484 static void freecbzpage (void *ptr)
485 {
486 cbz_free_page (state.u.cbz, ptr);
487 }
488
489 static void freeimgpage (void *ptr)
490 {
491 image_free_page (state.u.img, ptr);
492 }
493
494 static void openxref (char *filename, char *password)
495 {
496 int i, len;
497
498 for (i = 0; i < state.texcount; ++i) {
499 state.texowners[i].w = -1;
500 state.texowners[i].slice = NULL;
501 }
502
503 if (state.closedoc) state.closedoc ();
504
505 len = strlen (filename);
506
507 state.type = DPDF;
508 {
509 int i;
510 struct {
511 char *ext;
512 int type;
513 } tbl[] = {
514 { "pdf", DPDF },
515 { "xps", DXPS },
516 { "zip", DCBZ },
517 { "cbz", DCBZ },
518 { "jpg", DIMG },
519 { "jpeg", DIMG },
520 { "png", DIMG }
521 };
522
523 for (i = 0; i < sizeof (tbl) / sizeof (*tbl); ++i) {
524 int len2 = strlen (tbl[i].ext);
525
526 if (len2 < len && !strcasecmp (tbl[i].ext, filename + len - len2)) {
527 state.type = tbl[i].type;
528 break;
529 }
530 }
531 }
532
533 if (state.pagedims) {
534 free (state.pagedims);
535 state.pagedims = NULL;
536 }
537 state.pagedimcount = 0;
538
539 fz_set_aa_level (state.ctx, state.aalevel);
540 switch (state.type) {
541 case DPDF:
542 state.u.pdf = pdf_open_document (state.ctx, filename);
543 if (pdf_needs_password (state.u.pdf)) {
544 int okay = pdf_authenticate_password (state.u.pdf, password);
545 if (!okay) {
546 errx (1, "invalid password");
547 }
548 }
549 state.pagecount = pdf_count_pages (state.u.pdf);
550 state.closedoc = closepdf;
551 state.freepage = freepdfpage;
552 break;
553
554 case DXPS:
555 state.u.xps = xps_open_document (state.ctx, filename);
556 state.pagecount = xps_count_pages (state.u.xps);
557 state.closedoc = closexps;
558 state.freepage = freexpspage;
559 break;
560
561 case DCBZ:
562 state.u.cbz = cbz_open_document (state.ctx, filename);
563 state.pagecount = cbz_count_pages (state.u.cbz);
564 state.closedoc = closecbz;
565 state.freepage = freecbzpage;
566 break;
567
568 case DIMG:
569 state.u.img = image_open_document (state.ctx, filename);
570 state.pagecount = 1;
571 state.closedoc = closeimg;
572 state.freepage = freeimgpage;
573 break;
574 }
575 }
576
577 static void pdfinfo (void)
578 {
579 if (state.type == DPDF) {
580 pdf_obj *infoobj;
581
582 printd ("info PDF version\t%d.%d",
583 state.u.pdf->version / 10, state.u.pdf->version % 10);
584
585 infoobj = pdf_dict_gets (pdf_trailer (state.u.pdf), "Info");
586 if (infoobj) {
587 int i;
588 char *s;
589 char *items[] = { "Title", "Author", "Creator",
590 "Producer", "CreationDate" };
591
592 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
593 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
594 s = pdf_to_utf8 (state.u.pdf, obj);
595 if (*s) {
596 if (i == 0) {
597 printd ("title %s", s);
598 }
599 printd ("info %s\t%s", items[i], s);
600 }
601 fz_free (state.ctx, s);
602 }
603 }
604 printd ("infoend");
605 }
606 }
607
608 static void unlinktile (struct tile *tile)
609 {
610 int i;
611
612 for (i = 0; i < tile->slicecount; ++i) {
613 struct slice *s = &tile->slices[i];
614
615 if (s->texindex != -1) {
616 if (state.texowners[s->texindex].slice == s) {
617 state.texowners[s->texindex].slice = NULL;
618 }
619 }
620 }
621 }
622
623 static void freepage (struct page *page)
624 {
625 if (page->text) {
626 fz_free_text_page (state.ctx, page->text);
627 }
628 if (page->sheet) {
629 fz_free_text_sheet (state.ctx, page->sheet);
630 }
631 if (page->slinks) {
632 free (page->slinks);
633 }
634 fz_drop_display_list (state.ctx, page->dlist);
635 page->freepage (page->u.ptr);
636 free (page);
637 }
638
639 static void freetile (struct tile *tile)
640 {
641 unlinktile (tile);
642 if (!tile->pbo) {
643 #ifndef PIGGYBACK
644 fz_drop_pixmap (state.ctx, tile->pixmap);
645 #else
646 if (state.pig) {
647 fz_drop_pixmap (state.ctx, state.pig);
648 }
649 state.pig = tile->pixmap;
650 #endif
651 }
652 else {
653 free (tile->pbo);
654 fz_drop_pixmap (state.ctx, tile->pixmap);
655 }
656 free (tile);
657 }
658
659 #ifdef __ALTIVEC__
660 #include <stdint.h>
661 #include <altivec.h>
662
663 static int cacheline32bytes;
664
665 static void __attribute__ ((constructor)) clcheck (void)
666 {
667 char **envp = environ;
668 unsigned long *auxv;
669
670 while (*envp++);
671
672 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
673 if (*auxv == 19) {
674 cacheline32bytes = auxv[1] == 32;
675 return;
676 }
677 }
678 }
679
680 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
681 {
682 size_t size = pixmap->w * pixmap->h * pixmap->n;
683 if (cacheline32bytes && size > 32) {
684 intptr_t a1, a2, diff;
685 size_t sizea, i;
686 vector unsigned char v = vec_splat_u8 (-1);
687 vector unsigned char *p;
688
689 a1 = a2 = (intptr_t) pixmap->samples;
690 a2 = (a1 + 31) & ~31;
691 diff = a2 - a1;
692 sizea = size - diff;
693 p = (void *) a2;
694
695 while (a1 != a2) *(char *) a1++ = 0xff;
696 for (i = 0; i < (sizea & ~31); i += 32) {
697 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
698 vec_st (v, i, p);
699 vec_st (v, i + 16, p);
700 }
701 while (i < sizea) *((char *) a1 + i++) = 0xff;
702 }
703 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
704 }
705 #else
706 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
707 #endif
708
709 static void trimctm (pdf_page *page, int pindex)
710 {
711 fz_matrix ctm;
712 struct pagedim *pdim = &state.pagedims[pindex];
713
714 if (!pdim->tctmready) {
715 if (state.trimmargins) {
716 fz_rect realbox;
717 fz_matrix rm, sm, tm, im, ctm1;
718
719 fz_rotate (&rm, -pdim->rotate);
720 fz_scale (&sm, 1, -1);
721 fz_concat (&ctm, &rm, &sm);
722 realbox = pdim->mediabox;
723 fz_transform_rect (&realbox, &ctm);
724 fz_translate (&tm, -realbox.x0, -realbox.y0);
725 fz_concat (&ctm1, &ctm, &tm);
726 fz_invert_matrix (&im, &page->ctm);
727 fz_concat (&ctm, &im, &ctm1);
728 }
729 else {
730 ctm = fz_identity;
731 }
732 pdim->tctm = ctm;
733 pdim->tctmready = 1;
734 }
735 }
736
737 static fz_matrix pagectm (struct page *page)
738 {
739 fz_matrix ctm, tm;
740
741 if (page->type == DPDF) {
742 trimctm (page->u.pdfpage, page->pdimno);
743 fz_concat (&ctm,
744 &state.pagedims[page->pdimno].tctm,
745 &state.pagedims[page->pdimno].ctm);
746 }
747 else {
748 struct pagedim *pdim = &state.pagedims[page->pdimno];
749
750 fz_translate (&tm, -pdim->mediabox.x0, -pdim->mediabox.y0);
751 fz_concat (&ctm, &tm, &state.pagedims[page->pdimno].ctm);
752 }
753 return ctm;
754 }
755
756 static void *loadpage (int pageno, int pindex)
757 {
758 fz_device *dev;
759 struct page *page;
760
761 page = calloc (sizeof (struct page), 1);
762 if (!page) {
763 err (1, "calloc page %d", pageno);
764 }
765
766 page->dlist = fz_new_display_list (state.ctx);
767 dev = fz_new_list_device (state.ctx, page->dlist);
768 fz_try (state.ctx) {
769 switch (state.type) {
770 case DPDF:
771 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
772 pdf_run_page (state.u.pdf, page->u.pdfpage, dev,
773 &fz_identity, NULL);
774 page->freepage = freepdfpage;
775 break;
776
777 case DXPS:
778 page->u.xpspage = xps_load_page (state.u.xps, pageno);
779 xps_run_page (state.u.xps, page->u.xpspage, dev,
780 &fz_identity, NULL);
781 page->freepage = freexpspage;
782 break;
783
784 case DCBZ:
785 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
786 cbz_run_page (state.u.cbz, page->u.cbzpage, dev,
787 &fz_identity, NULL);
788 page->freepage = freecbzpage;
789 break;
790
791 case DIMG:
792 page->u.imgpage = image_load_page (state.u.img, pageno);
793 image_run_page (state.u.img, page->u.imgpage, dev,
794 &fz_identity, NULL);
795 page->freepage = freeimgpage;
796 break;
797 }
798 }
799 fz_catch (state.ctx) {
800 page->u.ptr = NULL;
801 page->freepage = freeemptyxxxpage;
802 }
803 fz_free_device (dev);
804
805 page->pdimno = pindex;
806 page->pageno = pageno;
807 page->sgen = state.gen;
808 page->tgen = state.gen;
809 page->type = state.type;
810
811 return page;
812 }
813
814 static struct tile *alloctile (int h)
815 {
816 int i;
817 int slicecount;
818 size_t tilesize;
819 struct tile *tile;
820
821 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
822 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
823 tile = calloc (tilesize, 1);
824 if (!tile) {
825 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
826 }
827 for (i = 0; i < slicecount; ++i) {
828 int sh = MIN (h, state.sliceheight);
829 tile->slices[i].h = sh;
830 tile->slices[i].texindex = -1;
831 h -= sh;
832 }
833 tile->slicecount = slicecount;
834 tile->sliceheight = state.sliceheight;
835 return tile;
836 }
837
838 #ifdef OBSCURED_OPT
839 struct obs {
840 int cured;
841 fz_irect b;
842 };
843
844 static void obs_fill_image (fz_device *dev, fz_image *image,
845 const fz_matrix *ctm, float alpha)
846 {
847 struct obs *obs = dev->user;
848
849 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
850 fz_irect b;
851 fz_rect rect = fz_unit_rect;
852
853 fz_transform_rect (&rect, ctm);
854 fz_round_rect (&b, &rect);
855 fz_intersect_irect (&b, &obs->b);
856 obs->cured = b.x0 == obs->b.x0
857 && b.x1 == obs->b.x1
858 && b.y0 == obs->b.y0
859 && b.y1 == obs->b.y1;
860 }
861 }
862
863 static int obscured (struct page *page, fz_irect bbox)
864 {
865 fz_rect rect;
866 fz_matrix ctm;
867 fz_device dev;
868 struct obs obs;
869
870 memset (&dev, 0, sizeof (dev));
871 memset (&obs, 0, sizeof (obs));
872 dev.hints = 0;
873 dev.flags = 0;
874 dev.user = &obs;
875 dev.ctx = state.ctx;
876 dev.fill_image = obs_fill_image;
877 obs.b = bbox;
878 fz_rect_from_irect (&rect, &bbox);
879 ctm = pagectm (page);
880 fz_run_display_list (page->dlist, &dev, &ctm, &rect, NULL);
881 return obs.cured;
882 }
883 #define OBSCURED obscured
884 #else
885 #define OBSCURED(a, b) 0
886 #endif
887
888 static struct tile *rendertile (struct page *page, int x, int y, int w, int h,
889 struct pbo *pbo)
890 {
891 fz_rect rect;
892 fz_irect bbox;
893 fz_matrix ctm;
894 fz_device *dev;
895 struct tile *tile;
896 struct pagedim *pdim;
897
898 tile = alloctile (h);
899 pdim = &state.pagedims[page->pdimno];
900
901 bbox = pdim->bounds;
902 bbox.x0 += x;
903 bbox.y0 += y;
904 bbox.x1 = bbox.x0 + w;
905 bbox.y1 = bbox.y0 + h;
906
907 if (state.pig) {
908 if (state.pig->w == w
909 && state.pig->h == h
910 && state.pig->colorspace == state.colorspace) {
911 tile->pixmap = state.pig;
912 tile->pixmap->x = bbox.x0;
913 tile->pixmap->y = bbox.y0;
914 }
915 else {
916 fz_drop_pixmap (state.ctx, state.pig);
917 }
918 state.pig = NULL;
919 }
920 if (!tile->pixmap) {
921 if (pbo) {
922 tile->pixmap =
923 fz_new_pixmap_with_bbox_and_data (state.ctx, state.colorspace,
924 &bbox, pbo->ptr);
925 tile->pbo = pbo;
926 }
927 else {
928 tile->pixmap =
929 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, &bbox);
930 }
931 }
932
933 tile->w = w;
934 tile->h = h;
935 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
936 clearpixmap (tile->pixmap);
937 }
938 dev = fz_new_draw_device (state.ctx, tile->pixmap);
939 ctm = pagectm (page);
940 fz_rect_from_irect (&rect, &bbox);
941 fz_run_display_list (page->dlist, dev, &ctm, &rect, NULL);
942 fz_free_device (dev);
943
944 return tile;
945 }
946
947 #ifdef SUMATRA_LOOKUP
948 /* Following two functions are taken (almost) verbatim from SumatraPDF
949 PdfEngine.cpp
950 */
951 static void
952 pdf_load_page_objs_rec(pdf_document *doc, pdf_obj *node, int *page_no, pdf_obj **page_objs)
953 {
954 fz_context *ctx = doc->ctx;
955
956 if (pdf_mark_obj(node))
957 fz_throw(ctx, FZ_ERROR_GENERIC, "cycle in page tree");
958
959 fz_try(ctx) {
960 pdf_obj *kids = pdf_dict_gets(node, "Kids");
961 int len = pdf_array_len(kids), i;
962 for (i = 0; i < len; i++) {
963 pdf_obj *kid = pdf_array_get(kids, i);
964 char *type = pdf_to_name(pdf_dict_gets(kid, "Type"));
965 if (!strcmp(type, "Page")) {
966 if (*page_no > pdf_count_pages(doc))
967 fz_throw(ctx, FZ_ERROR_GENERIC, "found more /Page objects than anticipated");
968 page_objs[*page_no - 1] = pdf_keep_obj(kid);
969 (*page_no)++;
970 }
971 else if (!strcmp(type, "Pages")) {
972 int count = pdf_to_int(pdf_dict_gets(kid, "Count"));
973 if (count > 0)
974 pdf_load_page_objs_rec(doc, kid, page_no, page_objs);
975 }
976 else {
977 fz_warn(ctx, "non-page object in page tree (%s)", type);
978 }
979 }
980 }
981 fz_always(ctx) {
982 pdf_unmark_obj(node);
983 }
984 fz_catch(ctx) {
985 fz_rethrow(ctx);
986 }
987 }
988
989 static void
990 pdf_load_page_objs(pdf_document *doc, pdf_obj **page_objs)
991 {
992 pdf_obj *pages = pdf_dict_getp(pdf_trailer(doc), "Root/Pages");
993 int page_no = 1;
994 pdf_load_page_objs_rec(doc, pages, &page_no, page_objs);
995 }
996 #endif
997
998 static void initpdims (void)
999 {
1000 double start, end;
1001 FILE *trimf = NULL;
1002 fz_rect rootmediabox;
1003 int pageno, trim, show;
1004 int trimw = 0, cxcount;
1005
1006 start = now ();
1007
1008 if (state.trimmargins && state.trimcachepath) {
1009 trimf = fopen (state.trimcachepath, "rb");
1010 if (!trimf) {
1011 trimf = fopen (state.trimcachepath, "wb");
1012 trimw = 1;
1013 }
1014 }
1015
1016 if (state.trimmargins || state.type == DPDF || !state.cxack)
1017 cxcount = state.pagecount;
1018 else
1019 cxcount = MIN (state.pagecount, 1);
1020
1021 if (state.type == DPDF) {
1022 pdf_obj *obj;
1023 obj = pdf_dict_getp (pdf_trailer (state.u.pdf),
1024 "Root/Pages/MediaBox");
1025 pdf_to_rect (state.ctx, obj, &rootmediabox);
1026 }
1027
1028 #ifdef SUMATRA_LOOKUP
1029 if (state.type == DPDF
1030 && (!state.pdflut.objs || state.pdflut.pdf != state.u.pdf)) {
1031 state.pdflut.objs = malloc (sizeof (*state.pdflut.objs) * cxcount);
1032 if (!state.pdflut.objs) {
1033 err (1, "malloc pageobjs %zu %d %zu failed",
1034 sizeof (*state.pdflut.objs), cxcount,
1035 sizeof (*state.pdflut.objs) * cxcount);
1036 }
1037 state.pdflut.count = cxcount;
1038 pdf_load_page_objs (state.u.pdf, state.pdflut.objs);
1039 state.pdflut.pdf = state.u.pdf;
1040 }
1041 #endif
1042
1043 for (pageno = 0; pageno < cxcount; ++pageno) {
1044 int rotate = 0;
1045 struct pagedim *p;
1046 fz_rect mediabox;
1047
1048 switch (state.type) {
1049 case DPDF: {
1050 pdf_document *pdf = state.u.pdf;
1051 pdf_obj *pageref, *pageobj;
1052
1053 #ifdef SUMATRA_LOOKUP
1054 pageref = state.pdflut.objs[pageno];
1055 #else
1056 pageref = pdf_lookup_page_obj (pdf, pageno);
1057 #endif
1058 pageobj = pdf_resolve_indirect (pageref);
1059
1060 if (state.trimmargins) {
1061 pdf_obj *obj;
1062 pdf_page *page;
1063
1064 fz_try (state.ctx) {
1065 page = pdf_load_page (pdf, pageno);
1066 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
1067 trim = state.trimanew || !obj;
1068 if (trim) {
1069 fz_rect rect;
1070 fz_matrix ctm;
1071 fz_device *dev;
1072
1073 dev = fz_new_bbox_device (state.ctx, &rect);
1074 dev->hints |= FZ_IGNORE_SHADE;
1075 fz_invert_matrix (&ctm, &page->ctm);
1076 pdf_run_page (pdf, page, dev, &fz_identity, NULL);
1077 fz_free_device (dev);
1078
1079 rect.x0 += state.trimfuzz.x0;
1080 rect.x1 += state.trimfuzz.x1;
1081 rect.y0 += state.trimfuzz.y0;
1082 rect.y1 += state.trimfuzz.y1;
1083 fz_transform_rect (&rect, &ctm);
1084 fz_intersect_rect (&rect, &page->mediabox);
1085
1086 if (fz_is_empty_rect (&rect)) {
1087 mediabox = page->mediabox;
1088 }
1089 else {
1090 mediabox = rect;
1091 }
1092
1093 obj = pdf_new_array (pdf, 4);
1094 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x0));
1095 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y0));
1096 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x1));
1097 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y1));
1098 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
1099 }
1100 else {
1101 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
1102 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
1103 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
1104 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
1105 }
1106
1107 rotate = page->rotate;
1108 pdf_free_page (pdf, page);
1109
1110 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
1111 if (show) {
1112 printd ("progress %f Trimming %d",
1113 (double) (pageno + 1) / state.pagecount,
1114 pageno + 1);
1115 }
1116 }
1117 fz_catch (state.ctx) {
1118 fprintf (stderr, "failed to load page %d\n", pageno+1);
1119 }
1120 }
1121 else {
1122 int empty = 0;
1123 fz_rect cropbox;
1124
1125 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "MediaBox"),
1126 &mediabox);
1127 if (fz_is_empty_rect (&mediabox)) {
1128 mediabox.x0 = 0;
1129 mediabox.y0 = 0;
1130 mediabox.x1 = 612;
1131 mediabox.y1 = 792;
1132 empty = 1;
1133 }
1134
1135 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "CropBox"),
1136 &cropbox);
1137 if (!fz_is_empty_rect (&cropbox)) {
1138 if (empty) {
1139 mediabox = cropbox;
1140 }
1141 else {
1142 fz_intersect_rect (&mediabox, &cropbox);
1143 }
1144 }
1145 else {
1146 if (empty) {
1147 if (fz_is_empty_rect (&rootmediabox)) {
1148 fprintf (stderr,
1149 "cannot find page size for page %d\n",
1150 pageno+1);
1151 }
1152 else {
1153 mediabox = rootmediabox;
1154 }
1155 }
1156 }
1157 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
1158 }
1159 break;
1160 }
1161
1162 case DXPS:
1163 {
1164 xps_page *page;
1165
1166 fz_try (state.ctx) {
1167 page = xps_load_page (state.u.xps, pageno);
1168 xps_bound_page (state.u.xps, page, &mediabox);
1169 rotate = 0;
1170 if (state.trimmargins) {
1171 fz_rect rect;
1172 fz_device *dev;
1173
1174 dev = fz_new_bbox_device (state.ctx, &rect);
1175 dev->hints |= FZ_IGNORE_SHADE;
1176 xps_run_page (state.u.xps, page, dev,
1177 &fz_identity, NULL);
1178 fz_free_device (dev);
1179
1180 rect.x0 += state.trimfuzz.x0;
1181 rect.x1 += state.trimfuzz.x1;
1182 rect.y0 += state.trimfuzz.y0;
1183 rect.y1 += state.trimfuzz.y1;
1184 fz_intersect_rect (&rect, &mediabox);
1185
1186 if (!fz_is_empty_rect (&rect)) {
1187 mediabox = rect;
1188 }
1189 }
1190 xps_free_page (state.u.xps, page);
1191 if (!state.cxack) {
1192 printd ("progress %f loading %d",
1193 (double) (pageno + 1) / state.pagecount,
1194 pageno + 1);
1195 }
1196 }
1197 fz_catch (state.ctx) {
1198 }
1199 }
1200 break;
1201
1202 case DCBZ:
1203 {
1204 rotate = 0;
1205 mediabox.x0 = 0;
1206 mediabox.y0 = 0;
1207 mediabox.x1 = 900;
1208 mediabox.y1 = 900;
1209 if (state.trimmargins && trimw) {
1210 cbz_page *page;
1211
1212 fz_try (state.ctx) {
1213 page = cbz_load_page (state.u.cbz, pageno);
1214 cbz_bound_page (state.u.cbz, page, &mediabox);
1215 cbz_free_page (state.u.cbz, page);
1216 printd ("progress %f Trimming %d",
1217 (double) (pageno + 1) / state.pagecount,
1218 pageno + 1);
1219 }
1220 fz_catch (state.ctx) {
1221 fprintf (stderr, "failed to load page %d\n", pageno+1);
1222 }
1223 if (trimf) {
1224 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
1225 if (n - 1) {
1226 err (1, "fwrite trim mediabox");
1227 }
1228 }
1229 }
1230 else {
1231 if (trimf) {
1232 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
1233 if (n - 1) {
1234 err (1, "fread trim mediabox");
1235 }
1236 }
1237 else {
1238 if (state.cxack) {
1239 cbz_page *page;
1240 fz_try (state.ctx) {
1241 page = cbz_load_page (state.u.cbz, pageno);
1242 cbz_bound_page (state.u.cbz, page, &mediabox);
1243 cbz_free_page (state.u.cbz, page);
1244 }
1245 fz_catch (state.ctx) {
1246 fprintf (stderr, "failed to load cbz page\n");
1247 }
1248 }
1249 }
1250 }
1251 }
1252 break;
1253
1254 case DIMG:
1255 {
1256 image_page *page;
1257
1258 rotate = 0;
1259 mediabox.x0 = 0;
1260 mediabox.y0 = 0;
1261 mediabox.x1 = 900;
1262 mediabox.y1 = 900;
1263
1264 fz_try (state.ctx) {
1265 page = image_load_page (state.u.img, pageno);
1266 image_bound_page (state.u.img, page, &mediabox);
1267 image_free_page (state.u.img, page);
1268 }
1269 fz_catch (state.ctx) {
1270 fprintf (stderr, "failed to load page %d\n", pageno+1);
1271 }
1272 }
1273 break;
1274
1275 default:
1276 ARSERT (0 && state.type);
1277 }
1278
1279 if (state.pagedimcount == 0
1280 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1281 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1282 size_t size;
1283
1284 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1285 state.pagedims = realloc (state.pagedims, size);
1286 if (!state.pagedims) {
1287 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1288 size, state.pagedimcount + 1);
1289 }
1290
1291 p = &state.pagedims[state.pagedimcount++];
1292 p->rotate = rotate;
1293 p->mediabox = mediabox;
1294 p->pageno = pageno;
1295 }
1296 }
1297 end = now ();
1298 if (state.trimmargins) {
1299 printd ("progress 1 Trimmed %d pages in %f seconds",
1300 state.pagecount, end - start);
1301 }
1302 else {
1303 printd ("vmsg Processed %d pages in %f seconds",
1304 state.pagecount, end - start);
1305 }
1306 state.trimanew = 0;
1307 if (trimf) {
1308 if (fclose (trimf)) {
1309 err (1, "fclose");
1310 }
1311 }
1312 }
1313
1314 static void layout (void)
1315 {
1316 int pindex;
1317 fz_rect box;
1318 fz_matrix ctm, rm;
1319 struct pagedim *p = p;
1320 double zw, w, maxw = 0.0, zoom = zoom;
1321
1322 if (state.pagedimcount == 0) return;
1323
1324 switch (state.fitmodel) {
1325 case FitProportional:
1326 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1327 double x0, x1;
1328
1329 p = &state.pagedims[pindex];
1330 fz_rotate (&rm, p->rotate + state.rotate);
1331 box = p->mediabox;
1332 fz_transform_rect (&box, &rm);
1333
1334 x0 = MIN (box.x0, box.x1);
1335 x1 = MAX (box.x0, box.x1);
1336
1337 w = x1 - x0;
1338 maxw = MAX (w, maxw);
1339 zoom = state.w / maxw;
1340 }
1341 break;
1342
1343 case FitPage:
1344 maxw = state.w;
1345 break;
1346
1347 case FitWidth:
1348 break;
1349
1350 default:
1351 ARSERT (0 && state.fitmodel);
1352 }
1353
1354 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1355 fz_rect rect;
1356 fz_matrix tm, sm;
1357
1358 p = &state.pagedims[pindex];
1359 fz_rotate (&ctm, state.rotate);
1360 fz_rotate (&rm, p->rotate + state.rotate);
1361 box = p->mediabox;
1362 fz_transform_rect (&box, &rm);
1363 w = box.x1 - box.x0;
1364 switch (state.fitmodel) {
1365 case FitProportional:
1366 p->left = ((maxw - w) * zoom) / 2.0;
1367 break;
1368 case FitPage:
1369 {
1370 double zh, h;
1371 zw = maxw / w;
1372 h = box.y1 - box.y0;
1373 zh = state.h / h;
1374 zoom = MIN (zw, zh);
1375 p->left = (maxw - (w * zoom)) / 2.0;
1376 }
1377 break;
1378 case FitWidth:
1379 p->left = 0;
1380 zoom = state.w / w;
1381 break;
1382 }
1383
1384 fz_scale (&p->zoomctm, zoom, zoom);
1385 fz_concat (&ctm, &p->zoomctm, &ctm);
1386
1387 fz_rotate (&rm, p->rotate);
1388 p->pagebox = p->mediabox;
1389 fz_transform_rect (&p->pagebox, &rm);
1390 p->pagebox.x1 -= p->pagebox.x0;
1391 p->pagebox.y1 -= p->pagebox.y0;
1392 p->pagebox.x0 = 0;
1393 p->pagebox.y0 = 0;
1394 rect = p->pagebox;
1395 fz_transform_rect (&rect, &ctm);
1396 fz_round_rect (&p->bounds, &rect);
1397 p->ctm = ctm;
1398
1399 fz_translate (&tm, 0, -p->mediabox.y1);
1400 fz_scale (&sm, zoom, -zoom);
1401 fz_concat (&ctm, &tm, &sm);
1402 fz_concat (&p->lctm, &ctm, &rm);
1403
1404 p->tctmready = 0;
1405 }
1406
1407 do {
1408 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1409 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1410 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1411 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1412 int w = x1 - x0;
1413 int h = y1 - y0;
1414
1415 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1416 } while (p-- != state.pagedims);
1417 }
1418
1419 static
1420 struct anchor { int n; int x; int y; int w; int h; }
1421 desttoanchor (fz_link_dest *dest)
1422 {
1423 int i;
1424 struct anchor a;
1425 struct pagedim *pdim = state.pagedims;
1426
1427 a.n = -1;
1428 a.x = 0;
1429 a.y = 0;
1430 for (i = 0; i < state.pagedimcount; ++i) {
1431 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1432 break;
1433 pdim = &state.pagedims[i];
1434 }
1435 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1436 fz_point p;
1437 if (dest->ld.gotor.flags & fz_link_flag_l_valid)
1438 p.x = dest->ld.gotor.lt.x;
1439 else
1440 p.x = 0.0;
1441 p.y = dest->ld.gotor.lt.y;
1442 fz_transform_point (&p, &pdim->lctm);
1443 a.x = p.x;
1444 a.y = p.y;
1445 }
1446 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1447 double x0, x1, y0, y1;
1448
1449 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1450 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1451 a.w = x1 - x0;
1452 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1453 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1454 a.h = y1 - y0;
1455 a.n = dest->ld.gotor.page;
1456 }
1457 return a;
1458 }
1459
1460 static void recurse_outline (fz_outline *outline, int level)
1461 {
1462 while (outline) {
1463 switch (outline->dest.kind) {
1464 case FZ_LINK_GOTO:
1465 {
1466 struct anchor a = desttoanchor (&outline->dest);
1467
1468 if (a.n >= 0) {
1469 printd ("o %d %d %d %d %s",
1470 level, a.n, a.y, a.h, outline->title);
1471 }
1472 }
1473 break;
1474
1475 case FZ_LINK_URI:
1476 printd ("ou %d %" FMT_s " %s %s", level,
1477 strlen (outline->title), outline->title,
1478 outline->dest.ld.uri.uri);
1479 break;
1480
1481 case FZ_LINK_NONE:
1482 printd ("on %d %s", level, outline->title);
1483 break;
1484
1485 default:
1486 printd ("emsg Unhandled outline kind %d for %s\n",
1487 outline->dest.kind, outline->title);
1488 break;
1489 }
1490 if (outline->down) {
1491 recurse_outline (outline->down, level + 1);
1492 }
1493 outline = outline->next;
1494 }
1495 }
1496
1497 static void process_outline (void)
1498 {
1499 fz_outline *outline;
1500
1501 if (!state.needoutline) return;
1502
1503 state.needoutline = 0;
1504 switch (state.type) {
1505 case DPDF:
1506 outline = pdf_load_outline (state.u.pdf);
1507 break;
1508 case DXPS:
1509 outline = xps_load_outline (state.u.xps);
1510 break;
1511 default:
1512 outline = NULL;
1513 break;
1514 }
1515 if (outline) {
1516 recurse_outline (outline, 0);
1517 fz_free_outline (state.ctx, outline);
1518 }
1519 }
1520
1521 static char *strofspan (fz_text_span *span)
1522 {
1523 char *p;
1524 char utf8[10];
1525 fz_text_char *ch;
1526 size_t size = 0, cap = 80;
1527
1528 p = malloc (cap + 1);
1529 if (!p) return NULL;
1530
1531 for (ch = span->text; ch < span->text + span->len; ++ch) {
1532 int n = fz_runetochar (utf8, ch->c);
1533 if (size + n > cap) {
1534 cap *= 2;
1535 p = realloc (p, cap + 1);
1536 if (!p) return NULL;
1537 }
1538
1539 memcpy (p + size, utf8, n);
1540 size += n;
1541 }
1542 p[size] = 0;
1543 return p;
1544 }
1545
1546 static int matchspan (regex_t *re, fz_text_page *page,
1547 fz_text_span *span, fz_matrix ctm,
1548 int stop, int pageno, double start)
1549 {
1550 int ret;
1551 char *p;
1552 regmatch_t rm;
1553 int a, b, c;
1554 fz_rect sb, eb;
1555 fz_point p1, p2, p3, p4;
1556
1557 p = strofspan (span);
1558 if (!p) return -1;
1559
1560 ret = regexec (re, p, 1, &rm, 0);
1561 if (ret) {
1562 free (p);
1563 if (ret != REG_NOMATCH) {
1564 size_t size;
1565 char errbuf[80];
1566 size = regerror (ret, re, errbuf, sizeof (errbuf));
1567 printd ("msg regexec error `%.*s'",
1568 (int) size, errbuf);
1569 return -1;
1570 }
1571 return 0;
1572 }
1573 else {
1574 int l = span->len;
1575
1576 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1577 c += fz_runelen (span->text[a].c);
1578 }
1579 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1580 c += fz_runelen (span->text[b].c);
1581 }
1582
1583 if (fz_runelen (span->text[b].c) > 1) {
1584 b = MAX (0, b-1);
1585 }
1586
1587 fz_text_char_bbox (&sb, span, a);
1588 fz_text_char_bbox (&eb, span, b);
1589
1590 p1.x = sb.x0;
1591 p1.y = sb.y0;
1592 p2.x = eb.x1;
1593 p2.y = sb.y0;
1594 p3.x = eb.x1;
1595 p3.y = eb.y1;
1596 p4.x = sb.x0;
1597 p4.y = eb.y1;
1598
1599 if (!stop) {
1600 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1601 pageno, 1,
1602 p1.x, p1.y,
1603 p2.x, p2.y,
1604 p3.x, p3.y,
1605 p4.x, p4.y);
1606
1607 printd ("progress 1 found at %d `%.*s' in %f sec",
1608 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1609 now () - start);
1610 }
1611 else {
1612 printd ("match %d %d %f %f %f %f %f %f %f %f",
1613 pageno, 2,
1614 p1.x, p1.y,
1615 p2.x, p2.y,
1616 p3.x, p3.y,
1617 p4.x, p4.y);
1618 }
1619 free (p);
1620 return 1;
1621 }
1622 }
1623
1624 static int compareblocks (const void *l, const void *r)
1625 {
1626 fz_text_block const *ls = l;
1627 fz_text_block const* rs = r;
1628 return ls->bbox.y0 - rs->bbox.y0;
1629 }
1630
1631 /* wishful thinking function */
1632 static void search (regex_t *re, int pageno, int y, int forward)
1633 {
1634 int i, j;
1635 fz_matrix ctm;
1636 fz_device *tdev;
1637 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1638 fz_text_page *text;
1639 fz_text_sheet *sheet;
1640 struct pagedim *pdim, *pdimprev;
1641 int stop = 0, niters = 0;
1642 double start, end;
1643
1644 if (!(state.type == DPDF || state.type == DXPS))
1645 return;
1646
1647 start = now ();
1648 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1649 if (niters++ == 5) {
1650 niters = 0;
1651 if (hasdata ()) {
1652 printd ("progress 1 attention requested aborting search at %d",
1653 pageno);
1654 stop = 1;
1655 }
1656 else {
1657 printd ("progress %f searching in page %d",
1658 (double) (pageno + 1) / state.pagecount,
1659 pageno);
1660 }
1661 }
1662 pdimprev = NULL;
1663 for (i = 0; i < state.pagedimcount; ++i) {
1664 pdim = &state.pagedims[i];
1665 if (pdim->pageno == pageno) {
1666 goto found;
1667 }
1668 if (pdim->pageno > pageno) {
1669 pdim = pdimprev;
1670 goto found;
1671 }
1672 pdimprev = pdim;
1673 }
1674 pdim = pdimprev;
1675 found:
1676
1677 sheet = fz_new_text_sheet (state.ctx);
1678 text = fz_new_text_page (state.ctx);
1679 tdev = fz_new_text_device (state.ctx, sheet, text);
1680
1681 switch (state.type) {
1682 case DPDF:
1683 u.ptr = NULL;
1684 fz_try (state.ctx) {
1685 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1686 trimctm (u.pdfpage, pdim - state.pagedims);
1687 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1688 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1689 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1690 fz_end_page (tdev);
1691 }
1692 fz_catch (state.ctx) {
1693 fz_free_device (tdev);
1694 u.ptr = NULL;
1695 goto nextiter;
1696 }
1697 break;
1698
1699 case DXPS:
1700 u.xpspage = xps_load_page (state.u.xps, pageno);
1701 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1702 break;
1703
1704 default:
1705 ARSERT (0 && state.type);
1706 }
1707
1708 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1709 fz_free_device (tdev);
1710
1711 for (j = 0; j < text->len; ++j) {
1712 int k;
1713 fz_page_block *pb;
1714 fz_text_block *block;
1715
1716 pb = &text->blocks[forward ? j : text->len - 1 - j];
1717 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1718 block = pb->u.text;
1719
1720 for (k = 0; k < block->len; ++k) {
1721 fz_text_line *line;
1722 fz_text_span *span;
1723
1724 if (forward) {
1725 line = &block->lines[k];
1726 if (line->bbox.y0 < y + 1) continue;
1727 }
1728 else {
1729 line = &block->lines[block->len - 1 - k];
1730 if (line->bbox.y0 > y - 1) continue;
1731 }
1732
1733 for (span = line->first_span; span; span = span->next) {
1734 switch (matchspan (re, text, span, ctm,
1735 stop, pageno, start)) {
1736 case 0: break;
1737 case 1: stop = 1; break;
1738 case -1: stop = 1; goto endloop;
1739 }
1740 }
1741 }
1742 }
1743 nextiter:
1744 if (forward) {
1745 pageno += 1;
1746 y = 0;
1747 }
1748 else {
1749 pageno -= 1;
1750 y = INT_MAX;
1751 }
1752 endloop:
1753 fz_free_text_page (state.ctx, text);
1754 fz_free_text_sheet (state.ctx, sheet);
1755 if (u.ptr) {
1756 state.freepage (u.ptr);
1757 }
1758 }
1759 end = now ();
1760 if (!stop) {
1761 printd ("progress 1 no matches %f sec", end - start);
1762 }
1763 printd ("clearrects");
1764 }
1765
1766 static void set_tex_params (int colorspace)
1767 {
1768 union {
1769 unsigned char b;
1770 unsigned int s;
1771 } endianness = {1};
1772
1773 switch (colorspace) {
1774 case 0:
1775 state.texiform = GL_RGBA8;
1776 state.texform = GL_RGBA;
1777 state.texty = GL_UNSIGNED_BYTE;
1778 state.colorspace = fz_device_rgb (state.ctx);
1779 break;
1780 case 1:
1781 state.texiform = GL_RGBA8;
1782 state.texform = GL_BGRA;
1783 state.texty = endianness.s > 1
1784 ? GL_UNSIGNED_INT_8_8_8_8
1785 : GL_UNSIGNED_INT_8_8_8_8_REV;
1786 state.colorspace = fz_device_bgr (state.ctx);
1787 break;
1788 case 2:
1789 state.texiform = GL_LUMINANCE_ALPHA;
1790 state.texform = GL_LUMINANCE_ALPHA;
1791 state.texty = GL_UNSIGNED_BYTE;
1792 state.colorspace = fz_device_gray (state.ctx);
1793 break;
1794 default:
1795 errx (1, "invalid colorspce %d", colorspace);
1796 }
1797 }
1798
1799 static void realloctexts (int texcount)
1800 {
1801 size_t size;
1802
1803 if (texcount == state.texcount) return;
1804
1805 if (texcount < state.texcount) {
1806 glDeleteTextures (state.texcount - texcount,
1807 state.texids + texcount);
1808 }
1809
1810 size = texcount * sizeof (*state.texids);
1811 state.texids = realloc (state.texids, size);
1812 if (!state.texids) {
1813 err (1, "realloc texids %" FMT_s, size);
1814 }
1815
1816 size = texcount * sizeof (*state.texowners);
1817 state.texowners = realloc (state.texowners, size);
1818 if (!state.texowners) {
1819 err (1, "realloc texowners %" FMT_s, size);
1820 }
1821 if (texcount > state.texcount) {
1822 int i;
1823
1824 glGenTextures (texcount - state.texcount,
1825 state.texids + state.texcount);
1826 for (i = state.texcount; i < texcount; ++i) {
1827 state.texowners[i].w = -1;
1828 state.texowners[i].slice = NULL;
1829 }
1830 }
1831 state.texcount = texcount;
1832 state.texindex = 0;
1833 }
1834
1835 static char *mbtoutf8 (char *s)
1836 {
1837 char *p, *r;
1838 wchar_t *tmp;
1839 size_t i, ret, len;
1840
1841 len = mbstowcs (NULL, s, strlen (s));
1842 if (len == 0) {
1843 return s;
1844 }
1845 else {
1846 if (len == (size_t) -1) {
1847 return s;
1848 }
1849 }
1850
1851 tmp = malloc (len * sizeof (wchar_t));
1852 if (!tmp) {
1853 return s;
1854 }
1855
1856 ret = mbstowcs (tmp, s, len);
1857 if (ret == (size_t) -1) {
1858 free (tmp);
1859 return s;
1860 }
1861
1862 len = 0;
1863 for (i = 0; i < ret; ++i) {
1864 len += fz_runelen (tmp[i]);
1865 }
1866
1867 p = r = malloc (len + 1);
1868 if (!r) {
1869 free (tmp);
1870 return s;
1871 }
1872
1873 for (i = 0; i < ret; ++i) {
1874 p += fz_runetochar (p, tmp[i]);
1875 }
1876 *p = 0;
1877 free (tmp);
1878 return r;
1879 }
1880
1881 CAMLprim value ml_mbtoutf8 (value s_v)
1882 {
1883 CAMLparam1 (s_v);
1884 CAMLlocal1 (ret_v);
1885 char *s, *r;
1886
1887 s = String_val (s_v);
1888 r = mbtoutf8 (s);
1889 if (r == s) {
1890 ret_v = s_v;
1891 }
1892 else {
1893 ret_v = caml_copy_string (r);
1894 free (r);
1895 }
1896 CAMLreturn (ret_v);
1897 }
1898
1899 static void * mainloop (void *unused)
1900 {
1901 char *p = NULL;
1902 int len, ret, oldlen = 0;
1903
1904 for (;;) {
1905 len = readlen ();
1906 if (len == 0) {
1907 errx (1, "readlen returned 0");
1908 }
1909
1910 if (oldlen < len + 1) {
1911 p = realloc (p, len + 1);
1912 if (!p) {
1913 err (1, "realloc %d failed", len + 1);
1914 }
1915 oldlen = len + 1;
1916 }
1917 readdata (p, len);
1918 p[len] = 0;
1919
1920 if (!strncmp ("open", p, 4)) {
1921 int wthack, off, ok = 0;
1922 char *password;
1923 char *filename;
1924 char *utf8filename;
1925 size_t filenamelen;
1926
1927 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1928 if (ret != 2) {
1929 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1930 }
1931
1932 filename = p + 5 + off;
1933 filenamelen = strlen (filename);
1934 password = filename + filenamelen + 1;
1935
1936 lock ("open");
1937 fz_try (state.ctx) {
1938 openxref (filename, password);
1939 ok = 1;
1940 }
1941 fz_catch (state.ctx) {
1942 utf8filename = mbtoutf8 (filename);
1943 printd ("msg Could not open %s", utf8filename);
1944 }
1945 if (ok) {
1946 pdfinfo ();
1947 initpdims ();
1948 }
1949 unlock ("open");
1950
1951 if (ok) {
1952 if (!wthack) {
1953 utf8filename = mbtoutf8 (filename);
1954 printd ("msg Opened %s (press h/F1 to get help)",
1955 utf8filename);
1956 if (utf8filename != filename) {
1957 free (utf8filename);
1958 }
1959 }
1960 state.needoutline = 1;
1961 }
1962 }
1963 else if (!strncmp ("cs", p, 2)) {
1964 int i, colorspace;
1965
1966 ret = sscanf (p + 2, " %d", &colorspace);
1967 if (ret != 1) {
1968 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1969 }
1970 lock ("cs");
1971 set_tex_params (colorspace);
1972 for (i = 0; i < state.texcount; ++i) {
1973 state.texowners[i].w = -1;
1974 state.texowners[i].slice = NULL;
1975 }
1976 unlock ("cs");
1977 }
1978 else if (!strncmp ("freepage", p, 8)) {
1979 void *ptr;
1980
1981 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1982 if (ret != 1) {
1983 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1984 }
1985 freepage (ptr);
1986 }
1987 else if (!strncmp ("freetile", p, 8)) {
1988 void *ptr;
1989
1990 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1991 if (ret != 1) {
1992 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1993 }
1994 freetile (ptr);
1995 }
1996 else if (!strncmp ("search", p, 6)) {
1997 int icase, pageno, y, ret, len2, forward;
1998 char *pattern;
1999 regex_t re;
2000
2001 ret = sscanf (p + 6, " %d %d %d %d,%n",
2002 &icase, &pageno, &y, &forward, &len2);
2003 if (ret != 4) {
2004 errx (1, "malformed search `%s' ret=%d", p, ret);
2005 }
2006
2007 pattern = p + 6 + len2;
2008 ret = regcomp (&re, pattern,
2009 REG_EXTENDED | (icase ? REG_ICASE : 0));
2010 if (ret) {
2011 char errbuf[80];
2012 size_t size;
2013
2014 size = regerror (ret, &re, errbuf, sizeof (errbuf));
2015 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
2016 }
2017 else {
2018 search (&re, pageno, y, forward);
2019 regfree (&re);
2020 }
2021 }
2022 else if (!strncmp ("geometry", p, 8)) {
2023 int w, h, fitmodel;
2024
2025 printd ("clear");
2026 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
2027 if (ret != 3) {
2028 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
2029 }
2030
2031 lock ("geometry");
2032 state.h = h;
2033 if (w != state.w) {
2034 int i;
2035 state.w = w;
2036 for (i = 0; i < state.texcount; ++i) {
2037 state.texowners[i].slice = NULL;
2038 }
2039 }
2040 state.fitmodel = fitmodel;
2041 layout ();
2042 process_outline ();
2043
2044 state.gen++;
2045 unlock ("geometry");
2046 printd ("continue %d", state.pagecount);
2047 }
2048 else if (!strncmp ("reqlayout", p, 9)) {
2049 char *nameddest;
2050 int rotate, fitmodel, off, h;
2051
2052 printd ("clear");
2053 ret = sscanf (p + 9, " %d %d %d %n",
2054 &rotate, &fitmodel, &h, &off);
2055 if (ret != 3) {
2056 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
2057 }
2058 lock ("reqlayout");
2059 if (state.rotate != rotate || state.fitmodel != fitmodel) {
2060 state.gen += 1;
2061 }
2062 state.rotate = rotate;
2063 state.fitmodel = fitmodel;
2064 state.h = h;
2065 layout ();
2066 process_outline ();
2067
2068 nameddest = p + 9 + off;
2069 if (state.type == DPDF && nameddest && *nameddest) {
2070 struct anchor a;
2071 fz_link_dest dest;
2072 pdf_obj *needle, *obj;
2073
2074 needle = pdf_new_string (state.u.pdf, nameddest,
2075 strlen (nameddest));
2076 obj = pdf_lookup_dest (state.u.pdf, needle);
2077 if (obj) {
2078 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
2079
2080 a = desttoanchor (&dest);
2081 if (a.n >= 0) {
2082 printd ("a %d %d %d", a.n, a.x, a.y);
2083 }
2084 else {
2085 printd ("emsg failed to parse destination `%s'\n",
2086 nameddest);
2087 }
2088 }
2089 else {
2090 printd ("emsg destination `%s' not found\n",
2091 nameddest);
2092 }
2093 pdf_drop_obj (needle);
2094 }
2095
2096 state.gen++;
2097 unlock ("reqlayout");
2098 printd ("continue %d", state.pagecount);
2099 }
2100 else if (!strncmp ("page", p, 4)) {
2101 double a, b;
2102 struct page *page;
2103 int pageno, pindex, ret;
2104
2105 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
2106 if (ret != 2) {
2107 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
2108 }
2109
2110 lock ("page");
2111 a = now ();
2112 page = loadpage (pageno, pindex);
2113 b = now ();
2114 unlock ("page");
2115
2116 printd ("page %" FMT_ptr " %f", FMT_ptr_cast (page), b - a);
2117 }
2118 else if (!strncmp ("tile", p, 4)) {
2119 int x, y, w, h, ret;
2120 struct page *page;
2121 struct tile *tile;
2122 double a, b;
2123 void *data;
2124
2125 ret = sscanf (p + 4, " %" SCN_ptr " %d %d %d %d %" SCN_ptr,
2126 SCN_ptr_cast (&page), &x, &y, &w, &h,
2127 SCN_ptr_cast (&data));
2128 if (ret != 6) {
2129 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2130 }
2131
2132 lock ("tile");
2133 a = now ();
2134 tile = rendertile (page, x, y, w, h, data);
2135 b = now ();
2136 unlock ("tile");
2137
2138 printd ("tile %d %d %" FMT_ptr " %u %f",
2139 x, y,
2140 FMT_ptr_cast (tile),
2141 tile->w * tile->h * tile->pixmap->n,
2142 b - a);
2143 }
2144 else if (!strncmp ("settrim", p, 7)) {
2145 fz_irect fuzz;
2146 int trimmargins;
2147
2148 ret = sscanf (p + 7, " %d %d %d %d %d",
2149 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2150 if (ret != 5) {
2151 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2152 }
2153 printd ("clear");
2154 lock ("settrim");
2155 state.trimmargins = trimmargins;
2156 state.needoutline = 1;
2157 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2158 state.trimanew = 1;
2159 state.trimfuzz = fuzz;
2160 }
2161 state.pagedimcount = 0;
2162 free (state.pagedims);
2163 state.pagedims = NULL;
2164 initpdims ();
2165 layout ();
2166 process_outline ();
2167 unlock ("settrim");
2168 printd ("continue %d", state.pagecount);
2169 }
2170 else if (!strncmp ("sliceh", p, 6)) {
2171 int h;
2172
2173 ret = sscanf (p + 6, " %d", &h);
2174 if (ret != 1) {
2175 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2176 }
2177 if (h != state.sliceheight) {
2178 int i;
2179
2180 state.sliceheight = h;
2181 for (i = 0; i < state.texcount; ++i) {
2182 state.texowners[i].w = -1;
2183 state.texowners[i].h = -1;
2184 state.texowners[i].slice = NULL;
2185 }
2186 }
2187 }
2188 else if (!strncmp ("interrupt", p, 9)) {
2189 printd ("vmsg interrupted");
2190 }
2191 else {
2192 errx (1, "unknown command %.*s", len, p);
2193 }
2194 }
2195 return 0;
2196 }
2197
2198 CAMLprim value ml_realloctexts (value texcount_v)
2199 {
2200 CAMLparam1 (texcount_v);
2201 int ok;
2202
2203 if (trylock ("ml_realloctexts")) {
2204 ok = 0;
2205 goto done;
2206 }
2207 realloctexts (Int_val (texcount_v));
2208 ok = 1;
2209 unlock ("ml_realloctexts");
2210
2211 done:
2212 CAMLreturn (Val_bool (ok));
2213 }
2214
2215 static void recti (int x0, int y0, int x1, int y1)
2216 {
2217 GLfloat *v = state.vertices;
2218
2219 glVertexPointer (2, GL_FLOAT, 0, v);
2220 v[0] = x0; v[1] = y0;
2221 v[2] = x1; v[3] = y0;
2222 v[4] = x0; v[5] = y1;
2223 v[6] = x1; v[7] = y1;
2224 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2225 }
2226
2227 static void showsel (struct page *page, int ox, int oy)
2228 {
2229 int seen = 0;
2230 fz_irect bbox;
2231 fz_rect rect;
2232 fz_text_line *line;
2233 fz_page_block *pageb;
2234 fz_text_block *block;
2235 struct mark first, last;
2236 unsigned char selcolor[] = {15,15,15,140};
2237
2238 first = page->fmark;
2239 last = page->lmark;
2240
2241 if (!first.span || !last.span) return;
2242
2243 glEnable (GL_BLEND);
2244 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2245 glColor4ubv (selcolor);
2246
2247 ox += state.pagedims[page->pdimno].bounds.x0;
2248 oy += state.pagedims[page->pdimno].bounds.y0;
2249 for (pageb = page->text->blocks;
2250 pageb < page->text->blocks + page->text->len;
2251 ++pageb) {
2252 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2253 block = pageb->u.text;
2254
2255 for (line = block->lines;
2256 line < block->lines + block->len;
2257 ++line) {
2258 fz_text_span *span;
2259 rect = fz_empty_rect;
2260
2261 for (span = line->first_span; span; span = span->next) {
2262 int i, j, k;
2263 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2264
2265 j = 0;
2266 k = span->len - 1;
2267
2268 if (span == page->fmark.span && span == page->lmark.span) {
2269 seen = 1;
2270 j = MIN (first.i, last.i);
2271 k = MAX (first.i, last.i);
2272 }
2273 else {
2274 if (span == first.span) {
2275 seen = 1;
2276 j = first.i;
2277 }
2278 else if (span == last.span) {
2279 seen = 1;
2280 k = last.i;
2281 }
2282 }
2283
2284 if (seen) {
2285 for (i = j; i <= k; ++i) {
2286 fz_rect bbox;
2287 fz_union_rect (&rect,
2288 fz_text_char_bbox (&bbox, span, i));
2289 }
2290 fz_round_rect (&bbox, &rect);
2291 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2292 bbox.x0,
2293 bbox.y0,
2294 bbox.x1,
2295 bbox.y1,
2296 oy, ox);
2297
2298 recti (bbox.x0 + ox, bbox.y0 + oy,
2299 bbox.x1 + ox, bbox.y1 + oy);
2300 if (span == last.span) {
2301 goto done;
2302 }
2303 rect = fz_empty_rect;
2304 }
2305 }
2306 }
2307 }
2308 done:
2309 glDisable (GL_BLEND);
2310 }
2311
2312 #include "glfont.c"
2313
2314 static void highlightlinks (struct page *page, int xoff, int yoff)
2315 {
2316 fz_matrix ctm, tm, pm;
2317 fz_link *link, *links;
2318 GLfloat *texcoords = state.texcoords;
2319 GLfloat *vertices = state.vertices;
2320
2321 switch (page->type) {
2322 case DPDF:
2323 links = page->u.pdfpage->links;
2324 break;
2325
2326 case DXPS:
2327 links = page->u.xpspage->links;
2328 break;
2329
2330 default:
2331 return;
2332 }
2333
2334 glEnable (GL_TEXTURE_1D);
2335 glEnable (GL_BLEND);
2336 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2337 glBindTexture (GL_TEXTURE_1D, state.stid);
2338
2339 xoff -= state.pagedims[page->pdimno].bounds.x0;
2340 yoff -= state.pagedims[page->pdimno].bounds.y0;
2341 fz_translate (&tm, xoff, yoff);
2342 pm = pagectm (page);
2343 fz_concat (&ctm, &pm, &tm);
2344
2345 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2346 glVertexPointer (2, GL_FLOAT, 0, vertices);
2347
2348 for (link = links; link; link = link->next) {
2349 fz_point p1, p2, p3, p4;
2350
2351 p1.x = link->rect.x0;
2352 p1.y = link->rect.y0;
2353
2354 p2.x = link->rect.x1;
2355 p2.y = link->rect.y0;
2356
2357 p3.x = link->rect.x1;
2358 p3.y = link->rect.y1;
2359
2360 p4.x = link->rect.x0;
2361 p4.y = link->rect.y1;
2362
2363 fz_transform_point (&p1, &ctm);
2364 fz_transform_point (&p2, &ctm);
2365 fz_transform_point (&p3, &ctm);
2366 fz_transform_point (&p4, &ctm);
2367
2368 switch (link->dest.kind) {
2369 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2370 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2371 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2372 default: glColor3ub (0, 0, 0); break;
2373 }
2374
2375 {
2376 float w, h, s, t;
2377
2378 w = p2.x - p1.x;
2379 h = p2.y - p1.y;
2380 t = sqrtf (w*w + h*h) * .25f;
2381
2382 w = p3.x - p2.x;
2383 h = p3.y - p2.y;
2384 s = sqrtf (w*w + h*h) * .25f;
2385
2386 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2387 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2388
2389 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2390 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2391
2392 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2393 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2394
2395 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2396 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2397 }
2398 glDrawArrays (GL_LINES, 0, 8);
2399 }
2400
2401 glDisable (GL_BLEND);
2402 glDisable (GL_TEXTURE_1D);
2403 }
2404
2405 static int compareslinks (const void *l, const void *r)
2406 {
2407 struct slink const *ls = l;
2408 struct slink const *rs = r;
2409 if (ls->bbox.y0 == rs->bbox.y0) {
2410 return rs->bbox.x0 - rs->bbox.x0;
2411 }
2412 return ls->bbox.y0 - rs->bbox.y0;
2413 }
2414
2415 static void droptext (struct page *page)
2416 {
2417 if (page->text) {
2418 fz_free_text_page (state.ctx, page->text);
2419 page->fmark.i = -1;
2420 page->lmark.i = -1;
2421 page->fmark.span = NULL;
2422 page->lmark.span = NULL;
2423 page->text = NULL;
2424 }
2425 if (page->sheet) {
2426 fz_free_text_sheet (state.ctx, page->sheet);
2427 page->sheet = NULL;
2428 }
2429 }
2430
2431 static void dropslinks (struct page *page)
2432 {
2433 if (page->slinks) {
2434 free (page->slinks);
2435 page->slinks = NULL;
2436 page->slinkcount = 0;
2437 }
2438 }
2439
2440 static void ensureslinks (struct page *page)
2441 {
2442 fz_matrix ctm;
2443 int i, count = 0;
2444 size_t slinksize = sizeof (*page->slinks);
2445 fz_link *link, *links;
2446
2447 if (state.gen != page->sgen) {
2448 dropslinks (page);
2449 page->sgen = state.gen;
2450 }
2451 if (page->slinks) return;
2452
2453 switch (page->type) {
2454 case DPDF:
2455 links = page->u.pdfpage->links;
2456 trimctm (page->u.pdfpage, page->pdimno);
2457 fz_concat (&ctm,
2458 &state.pagedims[page->pdimno].tctm,
2459 &state.pagedims[page->pdimno].ctm);
2460 break;
2461
2462 case DXPS:
2463 links = page->u.xpspage->links;
2464 ctm = state.pagedims[page->pdimno].ctm;
2465 break;
2466
2467 default:
2468 return;
2469 }
2470
2471 for (link = links; link; link = link->next) {
2472 count++;
2473 }
2474 if (count > 0) {
2475 page->slinkcount = count;
2476 page->slinks = calloc (count, slinksize);
2477 if (!page->slinks) {
2478 err (1, "realloc slinks %d", count);
2479 }
2480
2481 for (i = 0, link = links; link; ++i, link = link->next) {
2482 fz_rect rect;
2483
2484 rect = link->rect;
2485 fz_transform_rect (&rect, &ctm);
2486 page->slinks[i].link = link;
2487 fz_round_rect (&page->slinks[i].bbox, &rect);
2488 }
2489 qsort (page->slinks, count, slinksize, compareslinks);
2490 }
2491 }
2492
2493 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2494 static void fmt_linkn (char *s, unsigned int u)
2495 {
2496 unsigned int len; unsigned int q;
2497 int zma = 'z' - 'a' + 1;
2498 len = 1; q = u;
2499 while (q > zma - 1) { ++len; q /= zma; }
2500 if (s) {
2501 s += len;
2502 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2503 /* handles u == 0 */
2504 }
2505 s[len] = 0;
2506 }
2507
2508 static void highlightslinks (struct page *page, int xoff, int yoff,
2509 int noff, char *targ, int tlen, int hfsize)
2510 {
2511 int i;
2512 char buf[40];
2513 struct slink *slink;
2514 double x0, y0, x1, y1, w;
2515
2516 ensureslinks (page);
2517 glColor3ub (0xc3, 0xb0, 0x91);
2518 for (i = 0; i < page->slinkcount; ++i) {
2519 fmt_linkn (buf, i + noff);
2520 if (!tlen || !strncmp (targ, buf, tlen)) {
2521 slink = &page->slinks[i];
2522
2523 x0 = slink->bbox.x0 + xoff - 5;
2524 y1 = slink->bbox.y0 + yoff - 5;
2525 y0 = y1 + 10 + hfsize;
2526 w = measure_string (state.face, hfsize, buf);
2527 x1 = x0 + w + 10;
2528 recti (x0, y0, x1, y1);
2529 }
2530 }
2531
2532 glEnable (GL_BLEND);
2533 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2534 glEnable (GL_TEXTURE_2D);
2535 glColor3ub (0, 0, 0);
2536 for (i = 0; i < page->slinkcount; ++i) {
2537 fmt_linkn (buf, i + noff);
2538 if (!tlen || !strncmp (targ, buf, tlen)) {
2539 slink = &page->slinks[i];
2540
2541 x0 = slink->bbox.x0 + xoff;
2542 y0 = slink->bbox.y0 + yoff + hfsize;
2543 draw_string (state.face, hfsize, x0, y0, buf);
2544 }
2545 }
2546 glDisable (GL_TEXTURE_2D);
2547 glDisable (GL_BLEND);
2548 }
2549
2550 static void uploadslice (struct tile *tile, struct slice *slice)
2551 {
2552 int offset;
2553 struct slice *slice1;
2554 unsigned char *texdata;
2555
2556 offset = 0;
2557 for (slice1 = tile->slices; slice != slice1; slice1++) {
2558 offset += slice1->h * tile->w * tile->pixmap->n;
2559 }
2560 if (slice->texindex != -1 && slice->texindex < state.texcount
2561 && state.texowners[slice->texindex].slice == slice) {
2562 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2563 }
2564 else {
2565 int subimage = 0;
2566 int texindex = state.texindex++ % state.texcount;
2567
2568 if (state.texowners[texindex].w == tile->w) {
2569 if (state.texowners[texindex].h >= slice->h) {
2570 subimage = 1;
2571 }
2572 else {
2573 state.texowners[texindex].h = slice->h;
2574 }
2575 }
2576 else {
2577 state.texowners[texindex].h = slice->h;
2578 }
2579
2580 state.texowners[texindex].w = tile->w;
2581 state.texowners[texindex].slice = slice;
2582 slice->texindex = texindex;
2583
2584 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2585 if (tile->pbo) {
2586 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2587 texdata = 0;
2588 }
2589 else {
2590 texdata = tile->pixmap->samples;
2591 }
2592 if (subimage) {
2593 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2594 0,
2595 0,
2596 0,
2597 tile->w,
2598 slice->h,
2599 state.texform,
2600 state.texty,
2601 texdata+offset
2602 );
2603 }
2604 else {
2605 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2606 0,
2607 state.texiform,
2608 tile->w,
2609 slice->h,
2610 0,
2611 state.texform,
2612 state.texty,
2613 texdata+offset
2614 );
2615 }
2616 if (tile->pbo) {
2617 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2618 }
2619 }
2620 }
2621
2622 CAMLprim value ml_begintiles (value unit_v)
2623 {
2624 CAMLparam1 (unit_v);
2625 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2626 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2627 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2628 CAMLreturn (unit_v);
2629 }
2630
2631 CAMLprim value ml_endtiles (value unit_v)
2632 {
2633 CAMLparam1 (unit_v);
2634 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2635 CAMLreturn (unit_v);
2636 }
2637
2638 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2639 {
2640 CAMLparam2 (args_v, ptr_v);
2641 int dispx = Int_val (Field (args_v, 0));
2642 int dispy = Int_val (Field (args_v, 1));
2643 int dispw = Int_val (Field (args_v, 2));
2644 int disph = Int_val (Field (args_v, 3));
2645 int tilex = Int_val (Field (args_v, 4));
2646 int tiley = Int_val (Field (args_v, 5));
2647 char *s = String_val (ptr_v);
2648 struct tile *tile = parse_pointer ("ml_drawtile", s);
2649 int slicey, firstslice;
2650 struct slice *slice;
2651 GLfloat *texcoords = state.texcoords;
2652 GLfloat *vertices = state.vertices;
2653
2654 firstslice = tiley / tile->sliceheight;
2655 slice = &tile->slices[firstslice];
2656 slicey = tiley % tile->sliceheight;
2657
2658 while (disph > 0) {
2659 int dh;
2660
2661 dh = slice->h - slicey;
2662 dh = MIN (disph, dh);
2663 uploadslice (tile, slice);
2664
2665 texcoords[0] = tilex; texcoords[1] = slicey;
2666 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2667 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2668 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2669
2670 vertices[0] = dispx; vertices[1] = dispy;
2671 vertices[2] = dispx+dispw; vertices[3] = dispy;
2672 vertices[4] = dispx; vertices[5] = dispy+dh;
2673 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2674
2675 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2676 dispy += dh;
2677 disph -= dh;
2678 slice++;
2679 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2680 slicey = 0;
2681 }
2682 CAMLreturn (Val_unit);
2683 }
2684
2685 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2686 value xoff_v, value yoff_v,
2687 value li_v)
2688 {
2689 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2690 int xoff = Int_val (xoff_v);
2691 int yoff = Int_val (yoff_v);
2692 int noff = Int_val (Field (li_v, 0));
2693 char *targ = String_val (Field (li_v, 1));
2694 int tlen = caml_string_length (Field (li_v, 1));
2695 int hfsize = Int_val (Field (li_v, 2));
2696 char *s = String_val (ptr_v);
2697 int hlmask = Int_val (hlinks_v);
2698 struct page *page = parse_pointer ("ml_postprocess", s);
2699
2700 if (!page->u.ptr) {
2701 /* deal with loadpage failed pages */
2702 goto done;
2703 }
2704
2705 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2706 if (trylock ("ml_postprocess")) {
2707 noff = 0;
2708 goto done;
2709 }
2710 if (hlmask & 2) {
2711 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2712 noff = page->slinkcount;
2713 }
2714 if (page->tgen == state.gen) {
2715 showsel (page, xoff, yoff);
2716 }
2717 unlock ("ml_postprocess");
2718
2719 done:
2720 CAMLreturn (Val_int (noff));
2721 }
2722
2723 static fz_link *getlink (struct page *page, int x, int y)
2724 {
2725 fz_point p;
2726 fz_matrix ctm;
2727 const fz_matrix *tctm;
2728 fz_link *link, *links;
2729
2730 switch (page->type) {
2731 case DPDF:
2732 trimctm (page->u.pdfpage, page->pdimno);
2733 tctm = &state.pagedims[page->pdimno].tctm;
2734 links = page->u.pdfpage->links;
2735 break;
2736
2737 case DXPS:
2738 tctm = &fz_identity;
2739 links = page->u.xpspage->links;
2740 break;
2741
2742 default:
2743 return NULL;
2744 }
2745 p.x = x;
2746 p.y = y;
2747
2748 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2749 fz_invert_matrix (&ctm, &ctm);
2750 fz_transform_point (&p, &ctm);
2751
2752 for (link = links; link; link = link->next) {
2753 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2754 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2755 return link;
2756 }
2757 }
2758 }
2759 return NULL;
2760 }
2761
2762 static void ensuretext (struct page *page)
2763 {
2764 if (state.gen != page->tgen) {
2765 droptext (page);
2766 page->tgen = state.gen;
2767 }
2768 if (!page->text) {
2769 fz_matrix ctm;
2770 fz_device *tdev;
2771
2772 page->text = fz_new_text_page (state.ctx);
2773 page->sheet = fz_new_text_sheet (state.ctx);
2774 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2775 ctm = pagectm (page);
2776 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2777 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2778 qsort (page->text->blocks, page->text->len,
2779 sizeof (*page->text->blocks), compareblocks);
2780 fz_end_page (tdev);
2781 fz_free_device (tdev);
2782 }
2783 }
2784
2785 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2786 {
2787 CAMLparam2 (start_page_v, dir_v);
2788 CAMLlocal1 (ret_v);
2789 int i, dir = Int_val (dir_v);
2790 int start_page = Int_val (start_page_v);
2791 int end_page = dir > 0 ? state.pagecount : -1;
2792
2793 ret_v = Val_int (0);
2794 if (!(state.type == DPDF || state.type == DXPS)) {
2795 goto done;
2796 }
2797
2798 lock ("ml_findpage_with_links");
2799 for (i = start_page + dir; i != end_page; i += dir) {
2800 int found;
2801
2802 switch (state.type) {
2803 case DPDF:
2804 {
2805 pdf_page *page = NULL;
2806
2807 fz_try (state.ctx) {
2808 page = pdf_load_page (state.u.pdf, i);
2809 found = !!page->links;
2810 }
2811 fz_catch (state.ctx) {
2812 found = 0;
2813 }
2814 if (page) {
2815 freepdfpage (page);
2816 }
2817 }
2818 break;
2819 case DXPS:
2820 {
2821 xps_page *page = xps_load_page (state.u.xps, i);
2822 found = !!page->links;
2823 freexpspage (page);
2824 }
2825 break;
2826
2827 default:
2828 ARSERT (0 && "invalid document type");
2829 }
2830
2831 if (found) {
2832 ret_v = caml_alloc_small (1, 1);
2833 Field (ret_v, 0) = Val_int (i);
2834 goto unlock;
2835 }
2836 }
2837 unlock:
2838 unlock ("ml_findpage_with_links");
2839
2840 done:
2841 CAMLreturn (ret_v);
2842 }
2843
2844 enum { dir_first, dir_last };
2845 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2846
2847 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2848 {
2849 CAMLparam2 (ptr_v, dir_v);
2850 CAMLlocal2 (ret_v, pos_v);
2851 struct page *page;
2852 int dirtag, i, slinkindex;
2853 struct slink *found = NULL ,*slink;
2854 char *s = String_val (ptr_v);
2855
2856 page = parse_pointer ("ml_findlink", s);
2857 ret_v = Val_int (0);
2858 if (trylock ("ml_findlink")) {
2859 goto done;
2860 }
2861
2862 ensureslinks (page);
2863
2864 if (Is_block (dir_v)) {
2865 dirtag = Tag_val (dir_v);
2866 switch (dirtag) {
2867 case dir_first_visible:
2868 {
2869 int x0, y0, dir, first_index, last_index;
2870
2871 pos_v = Field (dir_v, 0);
2872 x0 = Int_val (Field (pos_v, 0));
2873 y0 = Int_val (Field (pos_v, 1));
2874 dir = Int_val (Field (pos_v, 2));
2875
2876 if (dir >= 0) {
2877 dir = 1;
2878 first_index = 0;
2879 last_index = page->slinkcount;
2880 }
2881 else {
2882 first_index = page->slinkcount - 1;
2883 last_index = -1;
2884 }
2885
2886 for (i = first_index; i != last_index; i += dir) {
2887 slink = &page->slinks[i];
2888 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2889 found = slink;
2890 break;
2891 }
2892 }
2893 }
2894 break;
2895
2896 case dir_left:
2897 slinkindex = Int_val (Field (dir_v, 0));
2898 found = &page->slinks[slinkindex];
2899 for (i = slinkindex - 1; i >= 0; --i) {
2900 slink = &page->slinks[i];
2901 if (slink->bbox.x0 < found->bbox.x0) {
2902 found = slink;
2903 break;
2904 }
2905 }
2906 break;
2907
2908 case dir_right:
2909 slinkindex = Int_val (Field (dir_v, 0));
2910 found = &page->slinks[slinkindex];
2911 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2912 slink = &page->slinks[i];
2913 if (slink->bbox.x0 > found->bbox.x0) {
2914 found = slink;
2915 break;
2916 }
2917 }
2918 break;
2919
2920 case dir_down:
2921 slinkindex = Int_val (Field (dir_v, 0));
2922 found = &page->slinks[slinkindex];
2923 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2924 slink = &page->slinks[i];
2925 if (slink->bbox.y0 >= found->bbox.y0) {
2926 found = slink;
2927 break;
2928 }
2929 }
2930 break;
2931
2932 case dir_up:
2933 slinkindex = Int_val (Field (dir_v, 0));
2934 found = &page->slinks[slinkindex];
2935 for (i = slinkindex - 1; i >= 0; --i) {
2936 slink = &page->slinks[i];
2937 if (slink->bbox.y0 <= found->bbox.y0) {
2938 found = slink;
2939 break;
2940 }
2941 }
2942 break;
2943 }
2944 }
2945 else {
2946 dirtag = Int_val (dir_v);
2947 switch (dirtag) {
2948 case dir_first:
2949 found = page->slinks;
2950 break;
2951
2952 case dir_last:
2953 if (page->slinks) {
2954 found = page->slinks + (page->slinkcount - 1);
2955 }
2956 break;
2957 }
2958 }
2959 if (found) {
2960 ret_v = caml_alloc_small (2, 1);
2961 Field (ret_v, 0) = Val_int (found - page->slinks);
2962 }
2963
2964 unlock ("ml_findlink");
2965 done:
2966 CAMLreturn (ret_v);
2967 }
2968
2969 enum { uuri, ugoto, utext, uunexpected,
2970 ulaunch, unamed, uremote, uremotedest };
2971
2972 #define LINKTOVAL \
2973 { \
2974 int pageno; \
2975 \
2976 switch (link->dest.kind) { \
2977 case FZ_LINK_GOTO: \
2978 { \
2979 fz_point p; \
2980 \
2981 pageno = link->dest.ld.gotor.page; \
2982 p.x = 0; \
2983 p.y = 0; \
2984 \
2985 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2986 p.y = link->dest.ld.gotor.lt.y; \
2987 fz_transform_point (&p, &pdim->lctm); \
2988 if (p.y < 0) p.y = 0; \
2989 } \
2990 tup_v = caml_alloc_tuple (2); \
2991 ret_v = caml_alloc_small (1, ugoto); \
2992 Field (tup_v, 0) = Val_int (pageno); \
2993 Field (tup_v, 1) = Val_int (p.y); \
2994 Field (ret_v, 0) = tup_v; \
2995 } \
2996 break; \
2997 \
2998 case FZ_LINK_URI: \
2999 str_v = caml_copy_string (link->dest.ld.uri.uri); \
3000 ret_v = caml_alloc_small (1, uuri); \
3001 Field (ret_v, 0) = str_v; \
3002 break; \
3003 \
3004 case FZ_LINK_LAUNCH: \
3005 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
3006 ret_v = caml_alloc_small (1, ulaunch); \
3007 Field (ret_v, 0) = str_v; \
3008 break; \
3009 \
3010 case FZ_LINK_NAMED: \
3011 str_v = caml_copy_string (link->dest.ld.named.named); \
3012 ret_v = caml_alloc_small (1, unamed); \
3013 Field (ret_v, 0) = str_v; \
3014 break; \
3015 \
3016 case FZ_LINK_GOTOR: \
3017 { \
3018 int rty; \
3019 \
3020 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
3021 pageno = link->dest.ld.gotor.page; \
3022 if (pageno == -1) { \
3023 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
3024 rty = uremotedest; \
3025 } \
3026 else { \
3027 gr_v = Val_int (pageno); \
3028 rty = uremote; \
3029 } \
3030 tup_v = caml_alloc_tuple (2); \
3031 ret_v = caml_alloc_small (1, rty); \
3032 Field (tup_v, 0) = str_v; \
3033 Field (tup_v, 1) = gr_v; \
3034 Field (ret_v, 0) = tup_v; \
3035 } \
3036 break; \
3037 \
3038 default: \
3039 { \
3040 char buf[80]; \
3041 \
3042 snprintf (buf, sizeof (buf), \
3043 "unhandled link kind %d", link->dest.kind); \
3044 str_v = caml_copy_string (buf); \
3045 ret_v = caml_alloc_small (1, uunexpected); \
3046 Field (ret_v, 0) = str_v; \
3047 } \
3048 break; \
3049 } \
3050 }
3051
3052 CAMLprim value ml_getlink (value ptr_v, value n_v)
3053 {
3054 CAMLparam2 (ptr_v, n_v);
3055 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3056 fz_link *link;
3057 struct page *page;
3058 struct pagedim *pdim;
3059 char *s = String_val (ptr_v);
3060
3061 ret_v = Val_int (0);
3062 if (trylock ("ml_getlink")) {
3063 goto done;
3064 }
3065
3066 page = parse_pointer ("ml_getlink", s);
3067 ensureslinks (page);
3068 pdim = &state.pagedims[page->pdimno];
3069 link = page->slinks[Int_val (n_v)].link;
3070 LINKTOVAL;
3071
3072 unlock ("ml_getlink");
3073 done:
3074 CAMLreturn (ret_v);
3075 }
3076
3077 CAMLprim value ml_getlinkcount (value ptr_v)
3078 {
3079 CAMLparam1 (ptr_v);
3080 struct page *page;
3081 char *s = String_val (ptr_v);
3082
3083 page = parse_pointer ("ml_getlinkcount", s);
3084 CAMLreturn (Val_int (page->slinkcount));
3085 }
3086
3087 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
3088 {
3089 CAMLparam2 (ptr_v, n_v);
3090 CAMLlocal1 (ret_v);
3091 struct page *page;
3092 struct slink *slink;
3093 char *s = String_val (ptr_v);
3094
3095 page = parse_pointer ("ml_getlinkrect", s);
3096 ret_v = caml_alloc_tuple (4);
3097 if (trylock ("ml_getlinkrect")) {
3098 Field (ret_v, 0) = Val_int (0);
3099 Field (ret_v, 1) = Val_int (0);
3100 Field (ret_v, 2) = Val_int (0);
3101 Field (ret_v, 3) = Val_int (0);
3102 goto done;
3103 }
3104 ensureslinks (page);
3105
3106 slink = &page->slinks[Int_val (n_v)];
3107 Field (ret_v, 0) = Val_int (slink->bbox.x0);
3108 Field (ret_v, 1) = Val_int (slink->bbox.y0);
3109 Field (ret_v, 2) = Val_int (slink->bbox.x1);
3110 Field (ret_v, 3) = Val_int (slink->bbox.y1);
3111 unlock ("ml_getlinkrect");
3112
3113 done:
3114 CAMLreturn (ret_v);
3115 }
3116
3117 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3118 {
3119 CAMLparam3 (ptr_v, x_v, y_v);
3120 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3121 fz_link *link;
3122 struct page *page;
3123 char *s = String_val (ptr_v);
3124 int x = Int_val (x_v), y = Int_val (y_v);
3125 struct pagedim *pdim;
3126
3127 ret_v = Val_int (0);
3128 if (trylock ("ml_whatsunder")) {
3129 goto done;
3130 }
3131
3132 page = parse_pointer ("ml_whatsunder", s);
3133 pdim = &state.pagedims[page->pdimno];
3134 x += pdim->bounds.x0;
3135 y += pdim->bounds.y0;
3136 link = getlink (page, x, y);
3137 if (link) {
3138 LINKTOVAL;
3139 }
3140 else {
3141 fz_rect *b;
3142 fz_page_block *pageb;
3143 fz_text_block *block;
3144
3145 ensuretext (page);
3146 for (pageb = page->text->blocks;
3147 pageb < page->text->blocks + page->text->len;
3148 ++pageb) {
3149 fz_text_line *line;
3150 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3151 block = pageb->u.text;
3152
3153 b = &block->bbox;
3154 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3155 continue;
3156
3157 for (line = block->lines;
3158 line < block->lines + block->len;
3159 ++line) {
3160 fz_text_span *span;
3161
3162 b = &line->bbox;
3163 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3164 continue;
3165
3166 for (span = line->first_span; span; span = span->next) {
3167 int charnum;
3168
3169 b = &span->bbox;
3170 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3171 continue;
3172
3173 for (charnum = 0; charnum < span->len; ++charnum) {
3174 fz_rect bbox;
3175 fz_text_char_bbox (&bbox, span, charnum);
3176 b = &bbox;
3177
3178 if (x >= b->x0 && x <= b->x1
3179 && y >= b->y0 && y <= b->y1) {
3180 fz_text_style *style = span->text->style;
3181 const char *n2 =
3182 style->font && style->font->name
3183 ? style->font->name
3184 : "Span has no font name"
3185 ;
3186 FT_FaceRec *face = style->font->ft_face;
3187 if (face && face->family_name) {
3188 char *s;
3189 char *n1 = face->family_name;
3190 size_t l1 = strlen (n1);
3191 size_t l2 = strlen (n2);
3192
3193 if (l1 != l2 || memcmp (n1, n2, l1)) {
3194 s = malloc (l1 + l2 + 2);
3195 if (s) {
3196 memcpy (s, n2, l2);
3197 s[l2] = '=';
3198 memcpy (s + l2 + 1, n1, l1 + 1);
3199 str_v = caml_copy_string (s);
3200 free (s);
3201 }
3202 }
3203 }
3204 if (str_v == 0) {
3205 str_v = caml_copy_string (n2);
3206 }
3207 ret_v = caml_alloc_small (1, utext);
3208 Field (ret_v, 0) = str_v;
3209 goto unlock;
3210 }
3211 }
3212 }
3213 }
3214 }
3215 }
3216 unlock:
3217 unlock ("ml_whatsunder");
3218
3219 done:
3220 CAMLreturn (ret_v);
3221 }
3222
3223 enum { mark_page, mark_block, mark_line, mark_word };
3224
3225 static int uninteresting (int c)
3226 {
3227 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3228 || ispunct (c);
3229 }
3230
3231 CAMLprim value ml_clearmark (value ptr_v)
3232 {
3233 CAMLparam1 (ptr_v);
3234 char *s = String_val (ptr_v);
3235 struct page *page;
3236
3237 if (trylock ("ml_clearmark")) {
3238 goto done;
3239 }
3240
3241 page = parse_pointer ("ml_clearmark", s);
3242 page->fmark.span = NULL;
3243 page->lmark.span = NULL;
3244 page->fmark.i = 0;
3245 page->lmark.i = 0;
3246
3247 unlock ("ml_clearmark");
3248 done:
3249 CAMLreturn (Val_unit);
3250 }
3251
3252 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3253 {
3254 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3255 CAMLlocal1 (ret_v);
3256 fz_rect *b;
3257 struct page *page;
3258 fz_text_line *line;
3259 fz_page_block *pageb;
3260 fz_text_block *block;
3261 struct pagedim *pdim;
3262 int mark = Int_val (mark_v);
3263 char *s = String_val (ptr_v);
3264 int x = Int_val (x_v), y = Int_val (y_v);
3265
3266 ret_v = Val_bool (0);
3267 if (trylock ("ml_markunder")) {
3268 goto done;
3269 }
3270
3271 page = parse_pointer ("ml_markunder", s);
3272 pdim = &state.pagedims[page->pdimno];
3273
3274 ensuretext (page);
3275
3276 if (mark == mark_page) {
3277 int i;
3278 fz_page_block *pb1 = NULL, *pb2 = NULL;
3279
3280 for (i = 0; i < page->text->len; ++i) {
3281 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3282 pb1 = &page->text->blocks[i];
3283 break;
3284 }
3285 }
3286 if (!pb1) goto unlock;
3287
3288 for (i = page->text->len - 1; i >= 0; --i) {
3289 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3290 pb2 = &page->text->blocks[i];
3291 break;
3292 }
3293 }
3294 if (!pb2) goto unlock;
3295
3296 block = pb1->u.text;
3297
3298 page->fmark.i = 0;
3299 page->fmark.span = block->lines->first_span;
3300
3301 block = pb2->u.text;
3302 line = &block->lines[block->len - 1];
3303 page->lmark.i = line->last_span->len - 1;
3304 page->lmark.span = line->last_span;
3305 ret_v = Val_bool (1);
3306 goto unlock;
3307 }
3308
3309 x += pdim->bounds.x0;
3310 y += pdim->bounds.y0;
3311
3312 for (pageb = page->text->blocks;
3313 pageb < page->text->blocks + page->text->len;
3314 ++pageb) {
3315 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3316 block = pageb->u.text;
3317
3318 b = &block->bbox;
3319 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3320 continue;
3321
3322 if (mark == mark_block) {
3323 page->fmark.i = 0;
3324 page->fmark.span = block->lines->first_span;
3325
3326 line = &block->lines[block->len - 1];
3327 page->lmark.i = line->last_span->len - 1;
3328 page->lmark.span = line->last_span;
3329 ret_v = Val_bool (1);
3330 goto unlock;
3331 }
3332
3333 for (line = block->lines;
3334 line < block->lines + block->len;
3335 ++line) {
3336 fz_text_span *span;
3337
3338 b = &line->bbox;
3339 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3340 continue;
3341
3342 if (mark == mark_line) {
3343 page->fmark.i = 0;
3344 page->fmark.span = line->first_span;
3345
3346 page->lmark.i = line->last_span->len - 1;
3347 page->lmark.span = line->last_span;
3348 ret_v = Val_bool (1);
3349 goto unlock;
3350 }
3351
3352 for (span = line->first_span; span; span = span->next) {
3353 int charnum;
3354
3355 b = &span->bbox;
3356 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3357 continue;
3358
3359 for (charnum = 0; charnum < span->len; ++charnum) {
3360 fz_rect bbox;
3361 fz_text_char_bbox (&bbox, span, charnum);
3362 b = &bbox;
3363
3364 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3365 /* unicode ftw */
3366 int charnum2, charnum3 = -1, charnum4 = -1;
3367
3368 if (uninteresting (span->text[charnum].c)) goto unlock;
3369
3370 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3371 if (uninteresting (span->text[charnum2].c)) {
3372 charnum3 = charnum2 + 1;
3373 break;
3374 }
3375 }
3376 if (charnum3 == -1) charnum3 = 0;
3377
3378 for (charnum2 = charnum + 1;
3379 charnum2 < span->len;
3380 ++charnum2) {
3381 if (uninteresting (span->text[charnum2].c)) break;
3382 charnum4 = charnum2;
3383 }
3384 if (charnum4 == -1) goto unlock;
3385
3386 page->fmark.i = charnum3;
3387 page->fmark.span = span;
3388
3389 page->lmark.i = charnum4;
3390 page->lmark.span = span;
3391 ret_v = Val_bool (1);
3392 goto unlock;
3393 }
3394 }
3395 }
3396 }
3397 }
3398 unlock:
3399 if (!Bool_val (ret_v)) {
3400 page->fmark.span = NULL;
3401 page->lmark.span = NULL;
3402 page->fmark.i = 0;
3403 page->lmark.i = 0;
3404 }
3405 unlock ("ml_markunder");
3406
3407 done:
3408 CAMLreturn (ret_v);
3409 }
3410
3411 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3412 {
3413 CAMLparam3 (ptr_v, x_v, y_v);
3414 CAMLlocal2 (ret_v, res_v);
3415 fz_rect *b = NULL;
3416 struct page *page;
3417 fz_page_block *pageb;
3418 struct pagedim *pdim;
3419 char *s = String_val (ptr_v);
3420 int x = Int_val (x_v), y = Int_val (y_v);
3421
3422 ret_v = Val_int (0);
3423 if (trylock ("ml_rectofblock")) {
3424 goto done;
3425 }
3426
3427 page = parse_pointer ("ml_rectofblock", s);
3428 pdim = &state.pagedims[page->pdimno];
3429 x += pdim->bounds.x0;
3430 y += pdim->bounds.y0;
3431
3432 ensuretext (page);
3433
3434 for (pageb = page->text->blocks;
3435 pageb < page->text->blocks + page->text->len;
3436 ++pageb) {
3437 switch (pageb->type) {
3438 case FZ_PAGE_BLOCK_TEXT:
3439 b = &pageb->u.text->bbox;
3440 break;
3441
3442 case FZ_PAGE_BLOCK_IMAGE:
3443 b = &pageb->u.image->bbox;
3444 break;
3445
3446 default:
3447 continue;
3448 }
3449
3450 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3451 break;
3452 b = NULL;
3453 }
3454 if (b) {
3455 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3456 ret_v = caml_alloc_small (1, 1);
3457 Store_double_field (res_v, 0, b->x0);
3458 Store_double_field (res_v, 1, b->x1);
3459 Store_double_field (res_v, 2, b->y0);
3460 Store_double_field (res_v, 3, b->y1);
3461 Field (ret_v, 0) = res_v;
3462 }
3463 unlock ("ml_rectofblock");
3464
3465 done:
3466 CAMLreturn (ret_v);
3467 }
3468
3469 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3470 {
3471 CAMLparam2 (ptr_v, rect_v);
3472 fz_rect b;
3473 struct page *page;
3474 struct pagedim *pdim;
3475 char *s = String_val (ptr_v);
3476 int i, x0, x1, y0, y1, fi, li;
3477 fz_text_line *line;
3478 fz_page_block *pageb;
3479 fz_text_block *block;
3480 fz_text_span *span, *fspan, *lspan;
3481
3482 if (trylock ("ml_seltext")) {
3483 goto done;
3484 }
3485
3486 page = parse_pointer ("ml_seltext", s);
3487 ensuretext (page);
3488
3489 pdim = &state.pagedims[page->pdimno];
3490 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3491 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3492 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3493 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3494
3495 if (y0 > y1) {
3496 int t = y0;
3497 y0 = y1;
3498 y1 = t;
3499 x0 = x1;
3500 x1 = t;
3501 }
3502
3503 if (0) {
3504 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3505 glColor3ub (128, 128, 128);
3506 recti (x0, y0, x1, y1);
3507 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3508 }
3509
3510 fi = page->fmark.i;
3511 fspan = page->fmark.span;
3512
3513 li = page->lmark.i;
3514 lspan = page->lmark.span;
3515
3516 for (pageb = page->text->blocks;
3517 pageb < page->text->blocks + page->text->len;
3518 ++pageb) {
3519 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3520 block = pageb->u.text;
3521 for (line = block->lines;
3522 line < block->lines + block->len;
3523 ++line) {
3524 fz_text_span *span;
3525
3526 for (span = line->first_span; span; span = span->next) {
3527 for (i = 0; i < span->len; ++i) {
3528 int selected = 0;
3529
3530 fz_text_char_bbox (&b, span, i);
3531
3532 if (x0 >= b.x0 && x0 <= b.x1
3533 && y0 >= b.y0 && y0 <= b.y1) {
3534 fspan = span;
3535 fi = i;
3536 selected = 1;
3537 }
3538 if (x1 >= b.x0 && x1 <= b.x1
3539 && y1 >= b.y0 && y1 <= b.y1) {
3540 lspan = span;
3541 li = i;
3542 selected = 1;
3543 }
3544 if (0 && selected) {
3545 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3546 glColor3ub (128, 128, 128);
3547 recti (b.x0, b.y0, b.x1, b.y1);
3548 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3549 }
3550 }
3551 }
3552 }
3553 }
3554 if (x1 < x0 && fspan == lspan) {
3555 i = fi;
3556 span = fspan;
3557
3558 fi = li;
3559 fspan = lspan;
3560
3561 li = i;
3562 lspan = span;
3563 }
3564
3565 page->fmark.i = fi;
3566 page->fmark.span = fspan;
3567
3568 page->lmark.i = li;
3569 page->lmark.span = lspan;
3570
3571 unlock ("ml_seltext");
3572
3573 done:
3574 CAMLreturn (Val_unit);
3575 }
3576
3577 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3578 {
3579 char buf[4];
3580 int i, len, ret;
3581
3582 for (i = a; i <= b; ++i) {
3583 len = fz_runetochar (buf, span->text[i].c);
3584 ret = fwrite (buf, len, 1, f);
3585
3586 if (ret != 1) {
3587 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3588 len, ret, strerror (errno));
3589 return -1;
3590 }
3591 }
3592 return 0;
3593 }
3594
3595 #ifdef __CYGWIN__
3596 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3597 {
3598 caml_failwith ("ml_popen not implemented under Cygwin");
3599 }
3600 #else
3601 CAMLprim value ml_popen (value command_v, value fds_v)
3602 {
3603 CAMLparam2 (command_v, fds_v);
3604 CAMLlocal2 (l_v, tup_v);
3605 int ret;
3606 char *msg = NULL;
3607 value earg_v = Nothing;
3608 posix_spawnattr_t attr;
3609 posix_spawn_file_actions_t fa;
3610 char *argv[] = { "/bin/sh", "-c", NULL, NULL };
3611
3612 argv[2] = String_val (command_v);
3613
3614 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3615 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3616 }
3617
3618 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3619 msg = "posix_spawnattr_init";
3620 goto fail1;
3621 }
3622
3623 #ifdef POSIX_SPAWN_USEVFORK
3624 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3625 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3626 goto fail;
3627 }
3628 #endif
3629
3630 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3631 int fd1, fd2;
3632
3633 tup_v = Field (l_v, 0);
3634 fd1 = Int_val (Field (tup_v, 0));
3635 fd2 = Int_val (Field (tup_v, 1));
3636 if (fd2 < 0) {
3637 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3638 msg = "posix_spawn_file_actions_addclose";
3639 earg_v = tup_v;
3640 goto fail;
3641 }
3642 }
3643 else {
3644 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3645 msg = "posix_spawn_file_actions_adddup2";
3646 earg_v = tup_v;
3647 goto fail;
3648 }
3649 }
3650 }
3651
3652 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3653 msg = "posix_spawn";
3654 goto fail;
3655 }
3656
3657 fail:
3658 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3659 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3660 }
3661
3662 fail1:
3663 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3664 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3665 strerror (ret));
3666 }
3667
3668 if (msg)
3669 unix_error (ret, msg, earg_v);
3670
3671 CAMLreturn (Val_unit);
3672 }
3673 #endif
3674
3675 CAMLprim value ml_hassel (value ptr_v)
3676 {
3677 CAMLparam1 (ptr_v);
3678 CAMLlocal1 (ret_v);
3679 struct page *page;
3680 char *s = String_val (ptr_v);
3681
3682 ret_v = Val_bool (0);
3683 if (trylock ("ml_hassel")) {
3684 goto done;
3685 }
3686
3687 page = parse_pointer ("ml_hassel", s);
3688 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3689 unlock ("ml_hassel");
3690 done:
3691 CAMLreturn (ret_v);
3692 }
3693
3694 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3695 {
3696 CAMLparam2 (fd_v, ptr_v);
3697 FILE *f;
3698 int seen = 0;
3699 struct page *page;
3700 fz_text_line *line;
3701 fz_page_block *pageb;
3702 fz_text_block *block;
3703 int fd = Int_val (fd_v);
3704 char *s = String_val (ptr_v);
3705
3706 if (trylock ("ml_copysel")) {
3707 goto done;
3708 }
3709
3710 page = parse_pointer ("ml_copysel", s);
3711
3712 if (!page->fmark.span || !page->lmark.span) {
3713 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3714 goto unlock;
3715 }
3716
3717 f = fdopen (fd, "w");
3718 if (!f) {
3719 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3720 fd, strerror (errno));
3721 f = stdout;
3722 }
3723
3724 for (pageb = page->text->blocks;
3725 pageb < page->text->blocks + page->text->len;
3726 ++pageb) {
3727 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3728 block = pageb->u.text;
3729 for (line = block->lines;
3730 line < block->lines + block->len;
3731 ++line) {
3732 fz_text_span *span;
3733
3734 for (span = line->first_span; span; span = span->next) {
3735 int a, b;
3736
3737 seen |= span == page->fmark.span || span == page->lmark.span;
3738 a = span == page->fmark.span ? page->fmark.i : 0;
3739 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3740
3741 if (seen) {
3742 if (pipespan (f, span, a, b)) {
3743 goto close;
3744 }
3745 if (span == page->lmark.span) {
3746 goto close;
3747 }
3748 if (span == line->last_span) {
3749 if (putc ('\n', f) == EOF) {
3750 fprintf (stderr,
3751 "failed break line on sel pipe: %s\n",
3752 strerror (errno));
3753 goto close;
3754 }
3755 }
3756 }
3757 }
3758 }
3759 }
3760 close:
3761 if (f != stdout) {
3762 int ret = fclose (f);
3763 fd = -1;
3764 if (ret == -1) {
3765 if (errno != ECHILD) {
3766 fprintf (stderr, "failed to close sel pipe: %s\n",
3767 strerror (errno));
3768 }
3769 }
3770 }
3771 unlock:
3772 unlock ("ml_copysel");
3773
3774 done:
3775 if (fd >= 0) {
3776 if (close (fd)) {
3777 fprintf (stderr, "failed to close sel pipe: %s\n",
3778 strerror (errno));
3779 }
3780 }
3781 CAMLreturn (Val_unit);
3782 }
3783
3784 CAMLprim value ml_getpdimrect (value pagedimno_v)
3785 {
3786 CAMLparam1 (pagedimno_v);
3787 CAMLlocal1 (ret_v);
3788 int pagedimno = Int_val (pagedimno_v);
3789 fz_rect box;
3790
3791 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3792 if (trylock ("ml_getpdimrect")) {
3793 box = fz_empty_rect;
3794 }
3795 else {
3796 box = state.pagedims[pagedimno].mediabox;
3797 unlock ("ml_getpdimrect");
3798 }
3799
3800 Store_double_field (ret_v, 0, box.x0);
3801 Store_double_field (ret_v, 1, box.x1);
3802 Store_double_field (ret_v, 2, box.y0);
3803 Store_double_field (ret_v, 3, box.y1);
3804
3805 CAMLreturn (ret_v);
3806 }
3807
3808 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3809 value dw_v, value cols_v)
3810 {
3811 CAMLparam3 (winw_v, winh_v, dw_v);
3812 CAMLlocal1 (ret_v);
3813 int i;
3814 double zoom = -1.;
3815 double maxh = 0.0;
3816 struct pagedim *p;
3817 double winw = Int_val (winw_v);
3818 double winh = Int_val (winh_v);
3819 double dw = Int_val (dw_v);
3820 double cols = Int_val (cols_v);
3821 double pw = 1.0, ph = 1.0;
3822
3823 if (trylock ("ml_zoom_for_height")) {
3824 goto done;
3825 }
3826
3827 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3828 double w = p->pagebox.x1 / cols;
3829 double h = p->pagebox.y1;
3830 if (h > maxh) {
3831 maxh = h;
3832 ph = h;
3833 if (state.fitmodel != FitProportional) pw = w;
3834 }
3835 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3836 }
3837
3838 zoom = (((winh / ph) * pw) + dw) / winw;
3839 unlock ("ml_zoom_for_height");
3840 done:
3841 ret_v = caml_copy_double (zoom);
3842 CAMLreturn (ret_v);
3843 }
3844
3845 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3846 {
3847 CAMLparam4 (pt_v, x_v, y_v, string_v);
3848 CAMLlocal1 (ret_v);
3849 int pt = Int_val(pt_v);
3850 int x = Int_val (x_v);
3851 int y = Int_val (y_v);
3852 double w;
3853
3854 w = draw_string (state.face, pt, x, y, String_val (string_v));
3855 ret_v = caml_copy_double (w);
3856 CAMLreturn (ret_v);
3857 }
3858
3859 CAMLprim value ml_measure_string (value pt_v, value string_v)
3860 {
3861 CAMLparam2 (pt_v, string_v);
3862 CAMLlocal1 (ret_v);
3863 int pt = Int_val (pt_v);
3864 double w;
3865
3866 w = measure_string (state.face, pt, String_val (string_v));
3867 ret_v = caml_copy_double (w);
3868 CAMLreturn (ret_v);
3869 }
3870
3871 CAMLprim value ml_getpagebox (value opaque_v)
3872 {
3873 CAMLparam1 (opaque_v);
3874 CAMLlocal1 (ret_v);
3875 fz_rect rect;
3876 fz_irect bbox;
3877 fz_matrix ctm;
3878 fz_device *dev;
3879 char *s = String_val (opaque_v);
3880 struct page *page = parse_pointer ("ml_getpagebox", s);
3881
3882 ret_v = caml_alloc_tuple (4);
3883 dev = fz_new_bbox_device (state.ctx, &rect);
3884 dev->hints |= FZ_IGNORE_SHADE;
3885
3886 switch (page->type) {
3887 case DPDF:
3888 ctm = pagectm (page);
3889 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3890 break;
3891
3892 case DXPS:
3893 ctm = pagectm (page);
3894 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3895 break;
3896
3897 default:
3898 rect = fz_infinite_rect;
3899 break;
3900 }
3901
3902 fz_free_device (dev);
3903 fz_round_rect (&bbox, &rect);
3904 Field (ret_v, 0) = Val_int (bbox.x0);
3905 Field (ret_v, 1) = Val_int (bbox.y0);
3906 Field (ret_v, 2) = Val_int (bbox.x1);
3907 Field (ret_v, 3) = Val_int (bbox.y1);
3908
3909 CAMLreturn (ret_v);
3910 }
3911
3912 CAMLprim value ml_setaalevel (value level_v)
3913 {
3914 CAMLparam1 (level_v);
3915
3916 state.aalevel = Int_val (level_v);
3917 CAMLreturn (Val_unit);
3918 }
3919
3920 #pragma GCC diagnostic push
3921 #pragma GCC diagnostic ignored "-Wvariadic-macros"
3922 #include <X11/Xlib.h>
3923 #pragma GCC diagnostic pop
3924
3925 #include <GL/glx.h>
3926
3927 static struct {
3928 Window wid;
3929 Display *dpy;
3930 GLXContext ctx;
3931 XVisualInfo *visual;
3932 } glx;
3933
3934 CAMLprim value ml_glxinit (value display_v, value wid_v, value screen_v)
3935 {
3936 CAMLparam3 (display_v, wid_v, screen_v);
3937 int attribs[] = {GLX_RGBA, GLX_DOUBLEBUFFER, None};
3938
3939 glx.dpy = XOpenDisplay (String_val (display_v));
3940 if (!glx.dpy) {
3941 caml_failwith ("XOpenDisplay");
3942 }
3943
3944 glx.visual = glXChooseVisual (glx.dpy, Int_val (screen_v), attribs);
3945 if (!glx.visual) {
3946 XCloseDisplay (glx.dpy);
3947 caml_failwith ("glXChooseVisual");
3948 }
3949
3950 glx.wid = Int_val (wid_v);
3951 CAMLreturn (Val_int (glx.visual->visualid));
3952 }
3953
3954 CAMLprim value ml_glxcompleteinit (value unit_v)
3955 {
3956 CAMLparam1 (unit_v);
3957
3958 glx.ctx = glXCreateContext (glx.dpy, glx.visual, NULL, True);
3959 if (!glx.ctx) {
3960 caml_failwith ("glXCreateContext");
3961 }
3962
3963 XFree (glx.visual);
3964 glx.visual = NULL;
3965
3966 if (!glXMakeCurrent (glx.dpy, glx.wid, glx.ctx)) {
3967 glXDestroyContext (glx.dpy, glx.ctx);
3968 glx.ctx = NULL;
3969 caml_failwith ("glXMakeCurrent");
3970 }
3971 CAMLreturn (Val_unit);
3972 }
3973
3974 CAMLprim value ml_swapb (value unit_v)
3975 {
3976 CAMLparam1 (unit_v);
3977 glXSwapBuffers (glx.dpy, glx.wid);
3978 CAMLreturn (Val_unit);
3979 }
3980
3981 #include "keysym2ucs.c"
3982
3983 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3984 {
3985 CAMLparam1 (keysym_v);
3986 CAMLlocal1 (str_v);
3987 KeySym keysym = Int_val (keysym_v);
3988 Rune rune;
3989 int len;
3990 char buf[5];
3991
3992 rune = keysym2ucs (keysym);
3993 len = fz_runetochar (buf, rune);
3994 buf[len] = 0;
3995 str_v = caml_copy_string (buf);
3996 CAMLreturn (str_v);
3997 }
3998
3999 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
4000 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
4001
4002 CAMLprim value ml_platform (value unit_v)
4003 {
4004 CAMLparam1 (unit_v);
4005 int platid = piunknown;
4006
4007 #if defined __linux__
4008 platid = pilinux;
4009 #elif defined __CYGWIN__
4010 platid = picygwin;
4011 #elif defined __DragonFly__
4012 platid = pidragonflybsd;
4013 #elif defined __FreeBSD__
4014 platid = pifreebsd;
4015 #elif defined __OpenBSD__
4016 platid = piopenbsd;
4017 #elif defined __NetBSD__
4018 platid = pinetbsd;
4019 #elif defined __sun__
4020 platid = pisun;
4021 #elif defined __APPLE__
4022 platid = piosx;
4023 #endif
4024 CAMLreturn (Val_int (platid));
4025 }
4026
4027 CAMLprim value ml_cloexec (value fd_v)
4028 {
4029 CAMLparam1 (fd_v);
4030 int fd = Int_val (fd_v);
4031
4032 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
4033 uerror ("fcntl", Nothing);
4034 }
4035 CAMLreturn (Val_unit);
4036 }
4037
4038 CAMLprim value ml_getpbo (value w_v, value h_v, value cs_v)
4039 {
4040 CAMLparam2 (w_v, h_v);
4041 CAMLlocal1 (ret_v);
4042 struct pbo *pbo;
4043 int w = Int_val (w_v);
4044 int h = Int_val (h_v);
4045 int cs = Int_val (cs_v);
4046
4047 if (state.pbo_usable) {
4048 pbo = calloc (sizeof (*pbo), 1);
4049 if (!pbo) {
4050 err (1, "calloc pbo");
4051 }
4052
4053 switch (cs) {
4054 case 0:
4055 case 1:
4056 pbo->size = w*h*4;
4057 break;
4058 case 2:
4059 pbo->size = w*h*2;
4060 break;
4061 default:
4062 errx (1, "ml_getpbo: invalid colorspace %d", cs);
4063 }
4064
4065 state.glGenBuffersARB (1, &pbo->id);
4066 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->id);
4067 state.glBufferDataARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->size,
4068 NULL, GL_STREAM_DRAW);
4069 pbo->ptr = state.glMapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB,
4070 GL_READ_WRITE);
4071 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4072 if (!pbo->ptr) {
4073 fprintf (stderr, "glMapBufferARB failed: %#x\n", glGetError ());
4074 state.glDeleteBuffersARB (1, &pbo->id);
4075 free (pbo);
4076 ret_v = caml_copy_string ("0");
4077 }
4078 else {
4079 int res;
4080 char *s;
4081
4082 res = snprintf (NULL, 0, "%" FMT_ptr, FMT_ptr_cast (pbo));
4083 if (res < 0) {
4084 err (1, "snprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4085 }
4086 s = malloc (res+1);
4087 if (!s) {
4088 err (1, "malloc %d bytes failed", res+1);
4089 }
4090 res = sprintf (s, "%" FMT_ptr, FMT_ptr_cast (pbo));
4091 if (res < 0) {
4092 err (1, "sprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4093 }
4094 ret_v = caml_copy_string (s);
4095 free (s);
4096 }
4097 }
4098 else {
4099 ret_v = caml_copy_string ("0");
4100 }
4101 CAMLreturn (ret_v);
4102 }
4103
4104 CAMLprim value ml_freepbo (value s_v)
4105 {
4106 CAMLparam1 (s_v);
4107 char *s = String_val (s_v);
4108 struct tile *tile = parse_pointer ("ml_freepbo", s);
4109
4110 if (tile->pbo) {
4111 state.glDeleteBuffersARB (1, &tile->pbo->id);
4112 tile->pbo->id = -1;
4113 tile->pbo->ptr = NULL;
4114 tile->pbo->size = -1;
4115 }
4116 CAMLreturn (Val_unit);
4117 }
4118
4119 CAMLprim value ml_unmappbo (value s_v)
4120 {
4121 CAMLparam1 (s_v);
4122 char *s = String_val (s_v);
4123 struct tile *tile = parse_pointer ("ml_unmappbo", s);
4124
4125 if (tile->pbo) {
4126 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
4127 if (state.glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) == GL_FALSE) {
4128 errx (1, "glUnmapBufferARB failed: %#x\n", glGetError ());
4129 }
4130 tile->pbo->ptr = NULL;
4131 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4132 }
4133 CAMLreturn (Val_unit);
4134 }
4135
4136 static void setuppbo (void)
4137 {
4138 #define GGPA(n) (*(void (**) ()) &state.n = glXGetProcAddress ((GLubyte *) #n))
4139 state.pbo_usable = GGPA (glBindBufferARB)
4140 && GGPA (glUnmapBufferARB)
4141 && GGPA (glMapBufferARB)
4142 && GGPA (glBufferDataARB)
4143 && GGPA (glGenBuffersARB)
4144 && GGPA (glDeleteBuffersARB);
4145 #undef GGPA
4146 }
4147
4148 CAMLprim value ml_pbo_usable (value unit_v)
4149 {
4150 CAMLparam1 (unit_v);
4151 CAMLreturn (Val_bool (state.pbo_usable));
4152 }
4153
4154 CAMLprim value ml_unproject (value ptr_v, value x_v, value y_v)
4155 {
4156 CAMLparam3 (ptr_v, x_v, y_v);
4157 CAMLlocal2 (ret_v, tup_v);
4158 struct page *page;
4159 char *s = String_val (ptr_v);
4160 int x = Int_val (x_v), y = Int_val (y_v);
4161 struct pagedim *pdim;
4162 fz_point p;
4163 fz_matrix ctm;
4164
4165 page = parse_pointer ("ml_unproject", s);
4166 pdim = &state.pagedims[page->pdimno];
4167
4168 ret_v = Val_int (0);
4169 if (trylock ("ml_unproject")) {
4170 goto done;
4171 }
4172
4173 switch (page->type) {
4174 case DPDF:
4175 trimctm (page->u.pdfpage, page->pdimno);
4176 break;
4177
4178 default:
4179 break;
4180 }
4181 p.x = x + pdim->bounds.x0;
4182 p.y = y + pdim->bounds.y0;
4183
4184 fz_concat (&ctm, &pdim->tctm, &pdim->ctm);
4185 fz_invert_matrix (&ctm, &ctm);
4186 fz_transform_point (&p, &ctm);
4187
4188 tup_v = caml_alloc_tuple (2);
4189 ret_v = caml_alloc_small (1, 1);
4190 Field (tup_v, 0) = Val_int (p.x);
4191 Field (tup_v, 1) = Val_int (p.y);
4192 Field (ret_v, 0) = tup_v;
4193
4194 unlock ("ml_unproject");
4195 done:
4196 CAMLreturn (ret_v);
4197 }
4198
4199 static void makestippletex (void)
4200 {
4201 const char pixels[] = "\xff\xff\0\0";
4202 glGenTextures (1, &state.stid);
4203 glBindTexture (GL_TEXTURE_1D, state.stid);
4204 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
4205 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
4206 glTexImage1D (
4207 GL_TEXTURE_1D,
4208 0,
4209 GL_ALPHA,
4210 4,
4211 0,
4212 GL_ALPHA,
4213 GL_UNSIGNED_BYTE,
4214 pixels
4215 );
4216 }
4217
4218 CAMLprim value ml_fz_version (value unit_v)
4219 {
4220 return caml_copy_string (FZ_VERSION);
4221 }
4222
4223 #ifdef USE_FONTCONFIG
4224 static struct {
4225 int inited;
4226 FcConfig *config;
4227 } fc;
4228
4229 static fz_font *fc_load_system_font_func (fz_context *ctx,
4230 const char *name,
4231 int bold,
4232 int italic,
4233 int needs_exact_metrics)
4234 {
4235 char *buf;
4236 size_t i, size;
4237 fz_font *font;
4238 FcChar8 *path;
4239 FcResult result;
4240 FcPattern *pat, *pat1;
4241
4242 lprintf ("looking up %s bold:%d italic:%d needs_exact_metrics:%d\n",
4243 name, bold, italic, needs_exact_metrics);
4244 if (!fc.inited) {
4245 fc.inited = 1;
4246 fc.config = FcInitLoadConfigAndFonts ();
4247 if (!fc.config) {
4248 lprintf ("FcInitLoadConfigAndFonts failed\n");
4249 return NULL;
4250 }
4251 }
4252 if (!fc.config) return NULL;
4253
4254 size = strlen (name);
4255 if (bold) size += sizeof (":bold") - 1;
4256 if (italic) size += sizeof (":italic") - 1;
4257 size += 1;
4258
4259 buf = malloc (size);
4260 if (!buf) {
4261 err (1, "malloc %zu failed", size);
4262 }
4263
4264 strcpy (buf, name);
4265 if (bold && italic) {
4266 strcat (buf, ":bold:italic");
4267 }
4268 else {
4269 if (bold) strcat (buf, ":bold");
4270 if (italic) strcat (buf, ":italic");
4271 }
4272 for (i = 0; i < size; ++i) {
4273 if (buf[i] == ',' || buf[i] == '-') buf[i] = ':';
4274 }
4275
4276 lprintf ("fcbuf=%s\n", buf);
4277 pat = FcNameParse ((FcChar8 *) buf);
4278 if (!pat) {
4279 printd ("emsg FcNameParse failed\n");
4280 free (buf);
4281 return NULL;
4282 }
4283
4284 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4285 printd ("emsg FcConfigSubstitute failed\n");
4286 free (buf);
4287 return NULL;
4288 }
4289 FcDefaultSubstitute (pat);
4290
4291 pat1 = FcFontMatch (fc.config, pat, &result);
4292 if (!pat1) {
4293 printd ("emsg FcFontMatch failed\n");
4294 FcPatternDestroy (pat);
4295 free (buf);
4296 return NULL;
4297 }
4298
4299 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4300 printd ("emsg FcPatternGetString failed\n");
4301 FcPatternDestroy (pat);
4302 FcPatternDestroy (pat1);
4303 free (buf);
4304 return NULL;
4305 }
4306
4307 #if 0
4308 printd ("emsg name=%s path=%s\n", name, path);
4309 #endif
4310 font = fz_new_font_from_file (ctx, name, (char *) path, 0, 0);
4311 FcPatternDestroy (pat);
4312 FcPatternDestroy (pat1);
4313 free (buf);
4314 return font;
4315 }
4316 #endif
4317
4318 CAMLprim value ml_init (value csock_v, value params_v)
4319 {
4320 CAMLparam2 (csock_v, params_v);
4321 CAMLlocal2 (trim_v, fuzz_v);
4322 int ret;
4323 int texcount;
4324 char *fontpath;
4325 int colorspace;
4326 int mustoresize;
4327 int haspboext;
4328 struct sigaction sa;
4329
4330 state.csock = Int_val (csock_v);
4331 state.rotate = Int_val (Field (params_v, 0));
4332 state.fitmodel = Int_val (Field (params_v, 1));
4333 trim_v = Field (params_v, 2);
4334 texcount = Int_val (Field (params_v, 3));
4335 state.sliceheight = Int_val (Field (params_v, 4));
4336 mustoresize = Int_val (Field (params_v, 5));
4337 colorspace = Int_val (Field (params_v, 6));
4338 fontpath = String_val (Field (params_v, 7));
4339
4340 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4341 if (!state.trimcachepath) {
4342 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4343 strerror (errno));
4344 }
4345 haspboext = Bool_val (Field (params_v, 9));
4346
4347 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4348
4349 #ifdef USE_FONTCONFIG
4350 fz_install_load_system_font_funcs (
4351 state.ctx, fc_load_system_font_func, NULL
4352 );
4353 #endif
4354
4355 state.trimmargins = Bool_val (Field (trim_v, 0));
4356 fuzz_v = Field (trim_v, 1);
4357 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4358 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4359 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4360 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4361
4362 set_tex_params (colorspace);
4363
4364 if (*fontpath) {
4365 #ifndef USE_FONTCONFIG
4366 state.face = load_font (fontpath);
4367 #else
4368 FcChar8 *path;
4369 FcResult result;
4370 char *buf = fontpath;
4371 FcPattern *pat, *pat1;
4372
4373 fc.inited = 1;
4374 fc.config = FcInitLoadConfigAndFonts ();
4375 if (!fc.config) {
4376 errx (1, "FcInitLoadConfigAndFonts failed");
4377 }
4378
4379 pat = FcNameParse ((FcChar8 *) buf);
4380 if (!pat) {
4381 errx (1, "FcNameParse failed");
4382 }
4383
4384 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4385 errx (1, "FcConfigSubstitute failed");
4386 }
4387 FcDefaultSubstitute (pat);
4388
4389 pat1 = FcFontMatch (fc.config, pat, &result);
4390 if (!pat1) {
4391 errx (1, "FcFontMatch failed");
4392 }
4393
4394 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4395 errx (1, "FcPatternGetString failed");
4396 }
4397
4398 state.face = load_font ((char *) path);
4399 FcPatternDestroy (pat);
4400 FcPatternDestroy (pat1);
4401 #endif
4402 }
4403 else {
4404 unsigned int len;
4405 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4406
4407 state.face = load_builtin_font (base, len);
4408 }
4409 if (!state.face) _exit (1);
4410
4411 realloctexts (texcount);
4412
4413 if (haspboext) {
4414 setuppbo ();
4415 }
4416
4417 makestippletex ();
4418
4419 #ifdef __CYGWIN__
4420 sa.sa_handler = SIG_IGN;
4421 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4422 #else
4423 sa.sa_handler = SIG_DFL;
4424 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4425 #endif
4426 if (sigemptyset (&sa.sa_mask)) {
4427 err (1, "sigemptyset");
4428 }
4429 if (sigaction (SIGCHLD, &sa, NULL)) {
4430 err (1, "sigaction");
4431 }
4432
4433 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4434 if (ret) {
4435 errx (1, "pthread_create: %s", strerror (ret));
4436 }
4437
4438 CAMLreturn (Val_unit);
4439 }
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