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Simplify
[llpp.git] / link.c
blobf49b7941875d9ae63cb962dd6404d6f937d1211c
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 }
1444 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1445 double x0, x1, y0, y1;
1446
1447 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1448 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1449 a.w = x1 - x0;
1450 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1451 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1452 a.h = y1 - y0;
1453 a.n = dest->ld.gotor.page;
1454 }
1455 return a;
1456 }
1457
1458 static void recurse_outline (fz_outline *outline, int level)
1459 {
1460 while (outline) {
1461 switch (outline->dest.kind) {
1462 case FZ_LINK_GOTO:
1463 {
1464 struct anchor a = desttoanchor (&outline->dest);
1465
1466 if (a.n >= 0) {
1467 printd ("o %d %d %d %d %s",
1468 level, a.n, a.y, a.h, outline->title);
1469 }
1470 }
1471 break;
1472
1473 case FZ_LINK_URI:
1474 printd ("ou %d %" FMT_s " %s %s", level,
1475 strlen (outline->title), outline->title,
1476 outline->dest.ld.uri.uri);
1477 break;
1478
1479 case FZ_LINK_NONE:
1480 printd ("on %d %s", level, outline->title);
1481 break;
1482
1483 default:
1484 printd ("emsg Unhandled outline kind %d for %s\n",
1485 outline->dest.kind, outline->title);
1486 break;
1487 }
1488 if (outline->down) {
1489 recurse_outline (outline->down, level + 1);
1490 }
1491 outline = outline->next;
1492 }
1493 }
1494
1495 static void process_outline (void)
1496 {
1497 fz_outline *outline;
1498
1499 if (!state.needoutline) return;
1500
1501 state.needoutline = 0;
1502 switch (state.type) {
1503 case DPDF:
1504 outline = pdf_load_outline (state.u.pdf);
1505 break;
1506 case DXPS:
1507 outline = xps_load_outline (state.u.xps);
1508 break;
1509 default:
1510 outline = NULL;
1511 break;
1512 }
1513 if (outline) {
1514 recurse_outline (outline, 0);
1515 fz_free_outline (state.ctx, outline);
1516 }
1517 }
1518
1519 static char *strofspan (fz_text_span *span)
1520 {
1521 char *p;
1522 char utf8[10];
1523 fz_text_char *ch;
1524 size_t size = 0, cap = 80;
1525
1526 p = malloc (cap + 1);
1527 if (!p) return NULL;
1528
1529 for (ch = span->text; ch < span->text + span->len; ++ch) {
1530 int n = fz_runetochar (utf8, ch->c);
1531 if (size + n > cap) {
1532 cap *= 2;
1533 p = realloc (p, cap + 1);
1534 if (!p) return NULL;
1535 }
1536
1537 memcpy (p + size, utf8, n);
1538 size += n;
1539 }
1540 p[size] = 0;
1541 return p;
1542 }
1543
1544 static int matchspan (regex_t *re, fz_text_page *page,
1545 fz_text_span *span, fz_matrix ctm,
1546 int stop, int pageno, double start)
1547 {
1548 int ret;
1549 char *p;
1550 regmatch_t rm;
1551 int a, b, c;
1552 fz_rect sb, eb;
1553 fz_point p1, p2, p3, p4;
1554
1555 p = strofspan (span);
1556 if (!p) return -1;
1557
1558 ret = regexec (re, p, 1, &rm, 0);
1559 if (ret) {
1560 free (p);
1561 if (ret != REG_NOMATCH) {
1562 size_t size;
1563 char errbuf[80];
1564 size = regerror (ret, re, errbuf, sizeof (errbuf));
1565 printd ("msg regexec error `%.*s'",
1566 (int) size, errbuf);
1567 return -1;
1568 }
1569 return 0;
1570 }
1571 else {
1572 int l = span->len;
1573
1574 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1575 c += fz_runelen (span->text[a].c);
1576 }
1577 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1578 c += fz_runelen (span->text[b].c);
1579 }
1580
1581 if (fz_runelen (span->text[b].c) > 1) {
1582 b = MAX (0, b-1);
1583 }
1584
1585 fz_text_char_bbox (&sb, span, a);
1586 fz_text_char_bbox (&eb, span, b);
1587
1588 p1.x = sb.x0;
1589 p1.y = sb.y0;
1590 p2.x = eb.x1;
1591 p2.y = sb.y0;
1592 p3.x = eb.x1;
1593 p3.y = eb.y1;
1594 p4.x = sb.x0;
1595 p4.y = eb.y1;
1596
1597 if (!stop) {
1598 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1599 pageno, 1,
1600 p1.x, p1.y,
1601 p2.x, p2.y,
1602 p3.x, p3.y,
1603 p4.x, p4.y);
1604
1605 printd ("progress 1 found at %d `%.*s' in %f sec",
1606 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1607 now () - start);
1608 }
1609 else {
1610 printd ("match %d %d %f %f %f %f %f %f %f %f",
1611 pageno, 2,
1612 p1.x, p1.y,
1613 p2.x, p2.y,
1614 p3.x, p3.y,
1615 p4.x, p4.y);
1616 }
1617 free (p);
1618 return 1;
1619 }
1620 }
1621
1622 static int compareblocks (const void *l, const void *r)
1623 {
1624 fz_text_block const *ls = l;
1625 fz_text_block const* rs = r;
1626 return ls->bbox.y0 - rs->bbox.y0;
1627 }
1628
1629 /* wishful thinking function */
1630 static void search (regex_t *re, int pageno, int y, int forward)
1631 {
1632 int i, j;
1633 fz_matrix ctm;
1634 fz_device *tdev;
1635 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1636 fz_text_page *text;
1637 fz_text_sheet *sheet;
1638 struct pagedim *pdim, *pdimprev;
1639 int stop = 0, niters = 0;
1640 double start, end;
1641
1642 if (!(state.type == DPDF || state.type == DXPS))
1643 return;
1644
1645 start = now ();
1646 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1647 if (niters++ == 5) {
1648 niters = 0;
1649 if (hasdata ()) {
1650 printd ("progress 1 attention requested aborting search at %d",
1651 pageno);
1652 stop = 1;
1653 }
1654 else {
1655 printd ("progress %f searching in page %d",
1656 (double) (pageno + 1) / state.pagecount,
1657 pageno);
1658 }
1659 }
1660 pdimprev = NULL;
1661 for (i = 0; i < state.pagedimcount; ++i) {
1662 pdim = &state.pagedims[i];
1663 if (pdim->pageno == pageno) {
1664 goto found;
1665 }
1666 if (pdim->pageno > pageno) {
1667 pdim = pdimprev;
1668 goto found;
1669 }
1670 pdimprev = pdim;
1671 }
1672 pdim = pdimprev;
1673 found:
1674
1675 sheet = fz_new_text_sheet (state.ctx);
1676 text = fz_new_text_page (state.ctx);
1677 tdev = fz_new_text_device (state.ctx, sheet, text);
1678
1679 switch (state.type) {
1680 case DPDF:
1681 u.ptr = NULL;
1682 fz_try (state.ctx) {
1683 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1684 trimctm (u.pdfpage, pdim - state.pagedims);
1685 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1686 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1687 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1688 fz_end_page (tdev);
1689 }
1690 fz_catch (state.ctx) {
1691 fz_free_device (tdev);
1692 u.ptr = NULL;
1693 goto nextiter;
1694 }
1695 break;
1696
1697 case DXPS:
1698 u.xpspage = xps_load_page (state.u.xps, pageno);
1699 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1700 break;
1701
1702 default:
1703 ARSERT (0 && state.type);
1704 }
1705
1706 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1707 fz_free_device (tdev);
1708
1709 for (j = 0; j < text->len; ++j) {
1710 int k;
1711 fz_page_block *pb;
1712 fz_text_block *block;
1713
1714 pb = &text->blocks[forward ? j : text->len - 1 - j];
1715 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1716 block = pb->u.text;
1717
1718 for (k = 0; k < block->len; ++k) {
1719 fz_text_line *line;
1720 fz_text_span *span;
1721
1722 if (forward) {
1723 line = &block->lines[k];
1724 if (line->bbox.y0 < y + 1) continue;
1725 }
1726 else {
1727 line = &block->lines[block->len - 1 - k];
1728 if (line->bbox.y0 > y - 1) continue;
1729 }
1730
1731 for (span = line->first_span; span; span = span->next) {
1732 switch (matchspan (re, text, span, ctm,
1733 stop, pageno, start)) {
1734 case 0: break;
1735 case 1: stop = 1; break;
1736 case -1: stop = 1; goto endloop;
1737 }
1738 }
1739 }
1740 }
1741 nextiter:
1742 if (forward) {
1743 pageno += 1;
1744 y = 0;
1745 }
1746 else {
1747 pageno -= 1;
1748 y = INT_MAX;
1749 }
1750 endloop:
1751 fz_free_text_page (state.ctx, text);
1752 fz_free_text_sheet (state.ctx, sheet);
1753 if (u.ptr) {
1754 state.freepage (u.ptr);
1755 }
1756 }
1757 end = now ();
1758 if (!stop) {
1759 printd ("progress 1 no matches %f sec", end - start);
1760 }
1761 printd ("clearrects");
1762 }
1763
1764 static void set_tex_params (int colorspace)
1765 {
1766 union {
1767 unsigned char b;
1768 unsigned int s;
1769 } endianness = {1};
1770
1771 switch (colorspace) {
1772 case 0:
1773 state.texiform = GL_RGBA8;
1774 state.texform = GL_RGBA;
1775 state.texty = GL_UNSIGNED_BYTE;
1776 state.colorspace = fz_device_rgb (state.ctx);
1777 break;
1778 case 1:
1779 state.texiform = GL_RGBA8;
1780 state.texform = GL_BGRA;
1781 state.texty = endianness.s > 1
1782 ? GL_UNSIGNED_INT_8_8_8_8
1783 : GL_UNSIGNED_INT_8_8_8_8_REV;
1784 state.colorspace = fz_device_bgr (state.ctx);
1785 break;
1786 case 2:
1787 state.texiform = GL_LUMINANCE_ALPHA;
1788 state.texform = GL_LUMINANCE_ALPHA;
1789 state.texty = GL_UNSIGNED_BYTE;
1790 state.colorspace = fz_device_gray (state.ctx);
1791 break;
1792 default:
1793 errx (1, "invalid colorspce %d", colorspace);
1794 }
1795 }
1796
1797 static void realloctexts (int texcount)
1798 {
1799 size_t size;
1800
1801 if (texcount == state.texcount) return;
1802
1803 if (texcount < state.texcount) {
1804 glDeleteTextures (state.texcount - texcount,
1805 state.texids + texcount);
1806 }
1807
1808 size = texcount * sizeof (*state.texids);
1809 state.texids = realloc (state.texids, size);
1810 if (!state.texids) {
1811 err (1, "realloc texids %" FMT_s, size);
1812 }
1813
1814 size = texcount * sizeof (*state.texowners);
1815 state.texowners = realloc (state.texowners, size);
1816 if (!state.texowners) {
1817 err (1, "realloc texowners %" FMT_s, size);
1818 }
1819 if (texcount > state.texcount) {
1820 int i;
1821
1822 glGenTextures (texcount - state.texcount,
1823 state.texids + state.texcount);
1824 for (i = state.texcount; i < texcount; ++i) {
1825 state.texowners[i].w = -1;
1826 state.texowners[i].slice = NULL;
1827 }
1828 }
1829 state.texcount = texcount;
1830 state.texindex = 0;
1831 }
1832
1833 static char *mbtoutf8 (char *s)
1834 {
1835 char *p, *r;
1836 wchar_t *tmp;
1837 size_t i, ret, len;
1838
1839 len = mbstowcs (NULL, s, strlen (s));
1840 if (len == 0) {
1841 return s;
1842 }
1843 else {
1844 if (len == (size_t) -1) {
1845 return s;
1846 }
1847 }
1848
1849 tmp = malloc (len * sizeof (wchar_t));
1850 if (!tmp) {
1851 return s;
1852 }
1853
1854 ret = mbstowcs (tmp, s, len);
1855 if (ret == (size_t) -1) {
1856 free (tmp);
1857 return s;
1858 }
1859
1860 len = 0;
1861 for (i = 0; i < ret; ++i) {
1862 len += fz_runelen (tmp[i]);
1863 }
1864
1865 p = r = malloc (len + 1);
1866 if (!r) {
1867 free (tmp);
1868 return s;
1869 }
1870
1871 for (i = 0; i < ret; ++i) {
1872 p += fz_runetochar (p, tmp[i]);
1873 }
1874 *p = 0;
1875 free (tmp);
1876 return r;
1877 }
1878
1879 CAMLprim value ml_mbtoutf8 (value s_v)
1880 {
1881 CAMLparam1 (s_v);
1882 CAMLlocal1 (ret_v);
1883 char *s, *r;
1884
1885 s = String_val (s_v);
1886 r = mbtoutf8 (s);
1887 if (r == s) {
1888 ret_v = s_v;
1889 }
1890 else {
1891 ret_v = caml_copy_string (r);
1892 free (r);
1893 }
1894 CAMLreturn (ret_v);
1895 }
1896
1897 static void * mainloop (void *unused)
1898 {
1899 char *p = NULL;
1900 int len, ret, oldlen = 0;
1901
1902 for (;;) {
1903 len = readlen ();
1904 if (len == 0) {
1905 errx (1, "readlen returned 0");
1906 }
1907
1908 if (oldlen < len + 1) {
1909 p = realloc (p, len + 1);
1910 if (!p) {
1911 err (1, "realloc %d failed", len + 1);
1912 }
1913 oldlen = len + 1;
1914 }
1915 readdata (p, len);
1916 p[len] = 0;
1917
1918 if (!strncmp ("open", p, 4)) {
1919 int wthack, off, ok = 0;
1920 char *password;
1921 char *filename;
1922 char *utf8filename;
1923 size_t filenamelen;
1924
1925 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1926 if (ret != 2) {
1927 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1928 }
1929
1930 filename = p + 5 + off;
1931 filenamelen = strlen (filename);
1932 password = filename + filenamelen + 1;
1933
1934 lock ("open");
1935 fz_try (state.ctx) {
1936 openxref (filename, password);
1937 ok = 1;
1938 }
1939 fz_catch (state.ctx) {
1940 utf8filename = mbtoutf8 (filename);
1941 printd ("msg Could not open %s", utf8filename);
1942 }
1943 if (ok) {
1944 pdfinfo ();
1945 initpdims ();
1946 }
1947 unlock ("open");
1948
1949 if (ok) {
1950 if (!wthack) {
1951 utf8filename = mbtoutf8 (filename);
1952 printd ("msg Opened %s (press h/F1 to get help)",
1953 utf8filename);
1954 if (utf8filename != filename) {
1955 free (utf8filename);
1956 }
1957 }
1958 state.needoutline = 1;
1959 }
1960 }
1961 else if (!strncmp ("cs", p, 2)) {
1962 int i, colorspace;
1963
1964 ret = sscanf (p + 2, " %d", &colorspace);
1965 if (ret != 1) {
1966 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1967 }
1968 lock ("cs");
1969 set_tex_params (colorspace);
1970 for (i = 0; i < state.texcount; ++i) {
1971 state.texowners[i].w = -1;
1972 state.texowners[i].slice = NULL;
1973 }
1974 unlock ("cs");
1975 }
1976 else if (!strncmp ("freepage", p, 8)) {
1977 void *ptr;
1978
1979 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1980 if (ret != 1) {
1981 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1982 }
1983 freepage (ptr);
1984 }
1985 else if (!strncmp ("freetile", p, 8)) {
1986 void *ptr;
1987
1988 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1989 if (ret != 1) {
1990 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1991 }
1992 freetile (ptr);
1993 }
1994 else if (!strncmp ("search", p, 6)) {
1995 int icase, pageno, y, ret, len2, forward;
1996 char *pattern;
1997 regex_t re;
1998
1999 ret = sscanf (p + 6, " %d %d %d %d,%n",
2000 &icase, &pageno, &y, &forward, &len2);
2001 if (ret != 4) {
2002 errx (1, "malformed search `%s' ret=%d", p, ret);
2003 }
2004
2005 pattern = p + 6 + len2;
2006 ret = regcomp (&re, pattern,
2007 REG_EXTENDED | (icase ? REG_ICASE : 0));
2008 if (ret) {
2009 char errbuf[80];
2010 size_t size;
2011
2012 size = regerror (ret, &re, errbuf, sizeof (errbuf));
2013 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
2014 }
2015 else {
2016 search (&re, pageno, y, forward);
2017 regfree (&re);
2018 }
2019 }
2020 else if (!strncmp ("geometry", p, 8)) {
2021 int w, h, fitmodel;
2022
2023 printd ("clear");
2024 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
2025 if (ret != 3) {
2026 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
2027 }
2028
2029 lock ("geometry");
2030 state.h = h;
2031 if (w != state.w) {
2032 int i;
2033 state.w = w;
2034 for (i = 0; i < state.texcount; ++i) {
2035 state.texowners[i].slice = NULL;
2036 }
2037 }
2038 state.fitmodel = fitmodel;
2039 layout ();
2040 process_outline ();
2041
2042 state.gen++;
2043 unlock ("geometry");
2044 printd ("continue %d", state.pagecount);
2045 }
2046 else if (!strncmp ("reqlayout", p, 9)) {
2047 char *nameddest;
2048 int rotate, fitmodel, off, h;
2049
2050 printd ("clear");
2051 ret = sscanf (p + 9, " %d %d %d %n",
2052 &rotate, &fitmodel, &h, &off);
2053 if (ret != 3) {
2054 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
2055 }
2056 lock ("reqlayout");
2057 if (state.rotate != rotate || state.fitmodel != fitmodel) {
2058 state.gen += 1;
2059 }
2060 state.rotate = rotate;
2061 state.fitmodel = fitmodel;
2062 state.h = h;
2063 layout ();
2064 process_outline ();
2065
2066 nameddest = p + 9 + off;
2067 if (state.type == DPDF && nameddest && *nameddest) {
2068 struct anchor a;
2069 fz_link_dest dest;
2070 pdf_obj *needle, *obj;
2071
2072 needle = pdf_new_string (state.u.pdf, nameddest,
2073 strlen (nameddest));
2074 obj = pdf_lookup_dest (state.u.pdf, needle);
2075 if (obj) {
2076 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
2077
2078 a = desttoanchor (&dest);
2079 if (a.n >= 0) {
2080 printd ("a %d %d %d", a.n, a.x, a.y);
2081 }
2082 else {
2083 printd ("emsg failed to parse destination `%s'\n",
2084 nameddest);
2085 }
2086 }
2087 else {
2088 printd ("emsg destination `%s' not found\n",
2089 nameddest);
2090 }
2091 pdf_drop_obj (needle);
2092 }
2093
2094 state.gen++;
2095 unlock ("reqlayout");
2096 printd ("continue %d", state.pagecount);
2097 }
2098 else if (!strncmp ("page", p, 4)) {
2099 double a, b;
2100 struct page *page;
2101 int pageno, pindex, ret;
2102
2103 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
2104 if (ret != 2) {
2105 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
2106 }
2107
2108 lock ("page");
2109 a = now ();
2110 page = loadpage (pageno, pindex);
2111 b = now ();
2112 unlock ("page");
2113
2114 printd ("page %" FMT_ptr " %f", FMT_ptr_cast (page), b - a);
2115 }
2116 else if (!strncmp ("tile", p, 4)) {
2117 int x, y, w, h, ret;
2118 struct page *page;
2119 struct tile *tile;
2120 double a, b;
2121 void *data;
2122
2123 ret = sscanf (p + 4, " %" SCN_ptr " %d %d %d %d %" SCN_ptr,
2124 SCN_ptr_cast (&page), &x, &y, &w, &h,
2125 SCN_ptr_cast (&data));
2126 if (ret != 6) {
2127 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2128 }
2129
2130 lock ("tile");
2131 a = now ();
2132 tile = rendertile (page, x, y, w, h, data);
2133 b = now ();
2134 unlock ("tile");
2135
2136 printd ("tile %d %d %" FMT_ptr " %u %f",
2137 x, y,
2138 FMT_ptr_cast (tile),
2139 tile->w * tile->h * tile->pixmap->n,
2140 b - a);
2141 }
2142 else if (!strncmp ("settrim", p, 7)) {
2143 fz_irect fuzz;
2144 int trimmargins;
2145
2146 ret = sscanf (p + 7, " %d %d %d %d %d",
2147 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2148 if (ret != 5) {
2149 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2150 }
2151 printd ("clear");
2152 lock ("settrim");
2153 state.trimmargins = trimmargins;
2154 state.needoutline = 1;
2155 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2156 state.trimanew = 1;
2157 state.trimfuzz = fuzz;
2158 }
2159 state.pagedimcount = 0;
2160 free (state.pagedims);
2161 state.pagedims = NULL;
2162 initpdims ();
2163 layout ();
2164 process_outline ();
2165 unlock ("settrim");
2166 printd ("continue %d", state.pagecount);
2167 }
2168 else if (!strncmp ("sliceh", p, 6)) {
2169 int h;
2170
2171 ret = sscanf (p + 6, " %d", &h);
2172 if (ret != 1) {
2173 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2174 }
2175 if (h != state.sliceheight) {
2176 int i;
2177
2178 state.sliceheight = h;
2179 for (i = 0; i < state.texcount; ++i) {
2180 state.texowners[i].w = -1;
2181 state.texowners[i].h = -1;
2182 state.texowners[i].slice = NULL;
2183 }
2184 }
2185 }
2186 else if (!strncmp ("interrupt", p, 9)) {
2187 printd ("vmsg interrupted");
2188 }
2189 else {
2190 errx (1, "unknown command %.*s", len, p);
2191 }
2192 }
2193 return 0;
2194 }
2195
2196 CAMLprim value ml_realloctexts (value texcount_v)
2197 {
2198 CAMLparam1 (texcount_v);
2199 int ok;
2200
2201 if (trylock ("ml_realloctexts")) {
2202 ok = 0;
2203 goto done;
2204 }
2205 realloctexts (Int_val (texcount_v));
2206 ok = 1;
2207 unlock ("ml_realloctexts");
2208
2209 done:
2210 CAMLreturn (Val_bool (ok));
2211 }
2212
2213 static void recti (int x0, int y0, int x1, int y1)
2214 {
2215 GLfloat *v = state.vertices;
2216
2217 glVertexPointer (2, GL_FLOAT, 0, v);
2218 v[0] = x0; v[1] = y0;
2219 v[2] = x1; v[3] = y0;
2220 v[4] = x0; v[5] = y1;
2221 v[6] = x1; v[7] = y1;
2222 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2223 }
2224
2225 static void showsel (struct page *page, int ox, int oy)
2226 {
2227 int seen = 0;
2228 fz_irect bbox;
2229 fz_rect rect;
2230 fz_text_line *line;
2231 fz_page_block *pageb;
2232 fz_text_block *block;
2233 struct mark first, last;
2234 unsigned char selcolor[] = {15,15,15,140};
2235
2236 first = page->fmark;
2237 last = page->lmark;
2238
2239 if (!first.span || !last.span) return;
2240
2241 glEnable (GL_BLEND);
2242 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2243 glColor4ubv (selcolor);
2244
2245 ox += state.pagedims[page->pdimno].bounds.x0;
2246 oy += state.pagedims[page->pdimno].bounds.y0;
2247 for (pageb = page->text->blocks;
2248 pageb < page->text->blocks + page->text->len;
2249 ++pageb) {
2250 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2251 block = pageb->u.text;
2252
2253 for (line = block->lines;
2254 line < block->lines + block->len;
2255 ++line) {
2256 fz_text_span *span;
2257 rect = fz_empty_rect;
2258
2259 for (span = line->first_span; span; span = span->next) {
2260 int i, j, k;
2261 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2262
2263 j = 0;
2264 k = span->len - 1;
2265
2266 if (span == page->fmark.span && span == page->lmark.span) {
2267 seen = 1;
2268 j = MIN (first.i, last.i);
2269 k = MAX (first.i, last.i);
2270 }
2271 else {
2272 if (span == first.span) {
2273 seen = 1;
2274 j = first.i;
2275 }
2276 else if (span == last.span) {
2277 seen = 1;
2278 k = last.i;
2279 }
2280 }
2281
2282 if (seen) {
2283 for (i = j; i <= k; ++i) {
2284 fz_rect bbox;
2285 fz_union_rect (&rect,
2286 fz_text_char_bbox (&bbox, span, i));
2287 }
2288 fz_round_rect (&bbox, &rect);
2289 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2290 bbox.x0,
2291 bbox.y0,
2292 bbox.x1,
2293 bbox.y1,
2294 oy, ox);
2295
2296 recti (bbox.x0 + ox, bbox.y0 + oy,
2297 bbox.x1 + ox, bbox.y1 + oy);
2298 if (span == last.span) {
2299 goto done;
2300 }
2301 rect = fz_empty_rect;
2302 }
2303 }
2304 }
2305 }
2306 done:
2307 glDisable (GL_BLEND);
2308 }
2309
2310 #include "glfont.c"
2311
2312 static void highlightlinks (struct page *page, int xoff, int yoff)
2313 {
2314 fz_matrix ctm, tm, pm;
2315 fz_link *link, *links;
2316 GLfloat *texcoords = state.texcoords;
2317 GLfloat *vertices = state.vertices;
2318
2319 switch (page->type) {
2320 case DPDF:
2321 links = page->u.pdfpage->links;
2322 break;
2323
2324 case DXPS:
2325 links = page->u.xpspage->links;
2326 break;
2327
2328 default:
2329 return;
2330 }
2331
2332 glEnable (GL_TEXTURE_1D);
2333 glEnable (GL_BLEND);
2334 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2335 glBindTexture (GL_TEXTURE_1D, state.stid);
2336
2337 xoff -= state.pagedims[page->pdimno].bounds.x0;
2338 yoff -= state.pagedims[page->pdimno].bounds.y0;
2339 fz_translate (&tm, xoff, yoff);
2340 pm = pagectm (page);
2341 fz_concat (&ctm, &pm, &tm);
2342
2343 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2344 glVertexPointer (2, GL_FLOAT, 0, vertices);
2345
2346 for (link = links; link; link = link->next) {
2347 fz_point p1, p2, p3, p4;
2348
2349 p1.x = link->rect.x0;
2350 p1.y = link->rect.y0;
2351
2352 p2.x = link->rect.x1;
2353 p2.y = link->rect.y0;
2354
2355 p3.x = link->rect.x1;
2356 p3.y = link->rect.y1;
2357
2358 p4.x = link->rect.x0;
2359 p4.y = link->rect.y1;
2360
2361 fz_transform_point (&p1, &ctm);
2362 fz_transform_point (&p2, &ctm);
2363 fz_transform_point (&p3, &ctm);
2364 fz_transform_point (&p4, &ctm);
2365
2366 switch (link->dest.kind) {
2367 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2368 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2369 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2370 default: glColor3ub (0, 0, 0); break;
2371 }
2372
2373 {
2374 float w, h, s, t;
2375
2376 w = p2.x - p1.x;
2377 h = p2.y - p1.y;
2378 t = sqrtf (w*w + h*h) * .25f;
2379
2380 w = p3.x - p2.x;
2381 h = p3.y - p2.y;
2382 s = sqrtf (w*w + h*h) * .25f;
2383
2384 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2385 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2386
2387 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2388 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2389
2390 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2391 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2392
2393 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2394 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2395 }
2396 glDrawArrays (GL_LINES, 0, 8);
2397 }
2398
2399 glDisable (GL_BLEND);
2400 glDisable (GL_TEXTURE_1D);
2401 }
2402
2403 static int compareslinks (const void *l, const void *r)
2404 {
2405 struct slink const *ls = l;
2406 struct slink const *rs = r;
2407 if (ls->bbox.y0 == rs->bbox.y0) {
2408 return rs->bbox.x0 - rs->bbox.x0;
2409 }
2410 return ls->bbox.y0 - rs->bbox.y0;
2411 }
2412
2413 static void droptext (struct page *page)
2414 {
2415 if (page->text) {
2416 fz_free_text_page (state.ctx, page->text);
2417 page->fmark.i = -1;
2418 page->lmark.i = -1;
2419 page->fmark.span = NULL;
2420 page->lmark.span = NULL;
2421 page->text = NULL;
2422 }
2423 if (page->sheet) {
2424 fz_free_text_sheet (state.ctx, page->sheet);
2425 page->sheet = NULL;
2426 }
2427 }
2428
2429 static void dropslinks (struct page *page)
2430 {
2431 if (page->slinks) {
2432 free (page->slinks);
2433 page->slinks = NULL;
2434 page->slinkcount = 0;
2435 }
2436 }
2437
2438 static void ensureslinks (struct page *page)
2439 {
2440 fz_matrix ctm;
2441 int i, count = 0;
2442 size_t slinksize = sizeof (*page->slinks);
2443 fz_link *link, *links;
2444
2445 if (state.gen != page->sgen) {
2446 dropslinks (page);
2447 page->sgen = state.gen;
2448 }
2449 if (page->slinks) return;
2450
2451 switch (page->type) {
2452 case DPDF:
2453 links = page->u.pdfpage->links;
2454 trimctm (page->u.pdfpage, page->pdimno);
2455 fz_concat (&ctm,
2456 &state.pagedims[page->pdimno].tctm,
2457 &state.pagedims[page->pdimno].ctm);
2458 break;
2459
2460 case DXPS:
2461 links = page->u.xpspage->links;
2462 ctm = state.pagedims[page->pdimno].ctm;
2463 break;
2464
2465 default:
2466 return;
2467 }
2468
2469 for (link = links; link; link = link->next) {
2470 count++;
2471 }
2472 if (count > 0) {
2473 page->slinkcount = count;
2474 page->slinks = calloc (count, slinksize);
2475 if (!page->slinks) {
2476 err (1, "realloc slinks %d", count);
2477 }
2478
2479 for (i = 0, link = links; link; ++i, link = link->next) {
2480 fz_rect rect;
2481
2482 rect = link->rect;
2483 fz_transform_rect (&rect, &ctm);
2484 page->slinks[i].link = link;
2485 fz_round_rect (&page->slinks[i].bbox, &rect);
2486 }
2487 qsort (page->slinks, count, slinksize, compareslinks);
2488 }
2489 }
2490
2491 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2492 static void fmt_linkn (char *s, unsigned int u)
2493 {
2494 unsigned int len; unsigned int q;
2495 int zma = 'z' - 'a' + 1;
2496 len = 1; q = u;
2497 while (q > zma - 1) { ++len; q /= zma; }
2498 if (s) {
2499 s += len;
2500 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2501 /* handles u == 0 */
2502 }
2503 s[len] = 0;
2504 }
2505
2506 static void highlightslinks (struct page *page, int xoff, int yoff,
2507 int noff, char *targ, int tlen, int hfsize)
2508 {
2509 int i;
2510 char buf[40];
2511 struct slink *slink;
2512 double x0, y0, x1, y1, w;
2513
2514 ensureslinks (page);
2515 glColor3ub (0xc3, 0xb0, 0x91);
2516 for (i = 0; i < page->slinkcount; ++i) {
2517 fmt_linkn (buf, i + noff);
2518 if (!tlen || !strncmp (targ, buf, tlen)) {
2519 slink = &page->slinks[i];
2520
2521 x0 = slink->bbox.x0 + xoff - 5;
2522 y1 = slink->bbox.y0 + yoff - 5;
2523 y0 = y1 + 10 + hfsize;
2524 w = measure_string (state.face, hfsize, buf);
2525 x1 = x0 + w + 10;
2526 recti (x0, y0, x1, y1);
2527 }
2528 }
2529
2530 glEnable (GL_BLEND);
2531 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2532 glEnable (GL_TEXTURE_2D);
2533 glColor3ub (0, 0, 0);
2534 for (i = 0; i < page->slinkcount; ++i) {
2535 fmt_linkn (buf, i + noff);
2536 if (!tlen || !strncmp (targ, buf, tlen)) {
2537 slink = &page->slinks[i];
2538
2539 x0 = slink->bbox.x0 + xoff;
2540 y0 = slink->bbox.y0 + yoff + hfsize;
2541 draw_string (state.face, hfsize, x0, y0, buf);
2542 }
2543 }
2544 glDisable (GL_TEXTURE_2D);
2545 glDisable (GL_BLEND);
2546 }
2547
2548 static void uploadslice (struct tile *tile, struct slice *slice)
2549 {
2550 int offset;
2551 struct slice *slice1;
2552 unsigned char *texdata;
2553
2554 offset = 0;
2555 for (slice1 = tile->slices; slice != slice1; slice1++) {
2556 offset += slice1->h * tile->w * tile->pixmap->n;
2557 }
2558 if (slice->texindex != -1 && slice->texindex < state.texcount
2559 && state.texowners[slice->texindex].slice == slice) {
2560 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2561 }
2562 else {
2563 int subimage = 0;
2564 int texindex = state.texindex++ % state.texcount;
2565
2566 if (state.texowners[texindex].w == tile->w) {
2567 if (state.texowners[texindex].h >= slice->h) {
2568 subimage = 1;
2569 }
2570 else {
2571 state.texowners[texindex].h = slice->h;
2572 }
2573 }
2574 else {
2575 state.texowners[texindex].h = slice->h;
2576 }
2577
2578 state.texowners[texindex].w = tile->w;
2579 state.texowners[texindex].slice = slice;
2580 slice->texindex = texindex;
2581
2582 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2583 if (tile->pbo) {
2584 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2585 texdata = 0;
2586 }
2587 else {
2588 texdata = tile->pixmap->samples;
2589 }
2590 if (subimage) {
2591 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2592 0,
2593 0,
2594 0,
2595 tile->w,
2596 slice->h,
2597 state.texform,
2598 state.texty,
2599 texdata+offset
2600 );
2601 }
2602 else {
2603 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2604 0,
2605 state.texiform,
2606 tile->w,
2607 slice->h,
2608 0,
2609 state.texform,
2610 state.texty,
2611 texdata+offset
2612 );
2613 }
2614 if (tile->pbo) {
2615 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2616 }
2617 }
2618 }
2619
2620 CAMLprim value ml_begintiles (value unit_v)
2621 {
2622 CAMLparam1 (unit_v);
2623 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2624 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2625 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2626 CAMLreturn (unit_v);
2627 }
2628
2629 CAMLprim value ml_endtiles (value unit_v)
2630 {
2631 CAMLparam1 (unit_v);
2632 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2633 CAMLreturn (unit_v);
2634 }
2635
2636 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2637 {
2638 CAMLparam2 (args_v, ptr_v);
2639 int dispx = Int_val (Field (args_v, 0));
2640 int dispy = Int_val (Field (args_v, 1));
2641 int dispw = Int_val (Field (args_v, 2));
2642 int disph = Int_val (Field (args_v, 3));
2643 int tilex = Int_val (Field (args_v, 4));
2644 int tiley = Int_val (Field (args_v, 5));
2645 char *s = String_val (ptr_v);
2646 struct tile *tile = parse_pointer ("ml_drawtile", s);
2647 int slicey, firstslice;
2648 struct slice *slice;
2649 GLfloat *texcoords = state.texcoords;
2650 GLfloat *vertices = state.vertices;
2651
2652 firstslice = tiley / tile->sliceheight;
2653 slice = &tile->slices[firstslice];
2654 slicey = tiley % tile->sliceheight;
2655
2656 while (disph > 0) {
2657 int dh;
2658
2659 dh = slice->h - slicey;
2660 dh = MIN (disph, dh);
2661 uploadslice (tile, slice);
2662
2663 texcoords[0] = tilex; texcoords[1] = slicey;
2664 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2665 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2666 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2667
2668 vertices[0] = dispx; vertices[1] = dispy;
2669 vertices[2] = dispx+dispw; vertices[3] = dispy;
2670 vertices[4] = dispx; vertices[5] = dispy+dh;
2671 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2672
2673 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2674 dispy += dh;
2675 disph -= dh;
2676 slice++;
2677 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2678 slicey = 0;
2679 }
2680 CAMLreturn (Val_unit);
2681 }
2682
2683 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2684 value xoff_v, value yoff_v,
2685 value li_v)
2686 {
2687 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2688 int xoff = Int_val (xoff_v);
2689 int yoff = Int_val (yoff_v);
2690 int noff = Int_val (Field (li_v, 0));
2691 char *targ = String_val (Field (li_v, 1));
2692 int tlen = caml_string_length (Field (li_v, 1));
2693 int hfsize = Int_val (Field (li_v, 2));
2694 char *s = String_val (ptr_v);
2695 int hlmask = Int_val (hlinks_v);
2696 struct page *page = parse_pointer ("ml_postprocess", s);
2697
2698 if (!page->u.ptr) {
2699 /* deal with loadpage failed pages */
2700 goto done;
2701 }
2702
2703 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2704 if (trylock ("ml_postprocess")) {
2705 noff = 0;
2706 goto done;
2707 }
2708 if (hlmask & 2) {
2709 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2710 noff = page->slinkcount;
2711 }
2712 if (page->tgen == state.gen) {
2713 showsel (page, xoff, yoff);
2714 }
2715 unlock ("ml_postprocess");
2716
2717 done:
2718 CAMLreturn (Val_int (noff));
2719 }
2720
2721 static fz_link *getlink (struct page *page, int x, int y)
2722 {
2723 fz_point p;
2724 fz_matrix ctm;
2725 const fz_matrix *tctm;
2726 fz_link *link, *links;
2727
2728 switch (page->type) {
2729 case DPDF:
2730 trimctm (page->u.pdfpage, page->pdimno);
2731 tctm = &state.pagedims[page->pdimno].tctm;
2732 links = page->u.pdfpage->links;
2733 break;
2734
2735 case DXPS:
2736 tctm = &fz_identity;
2737 links = page->u.xpspage->links;
2738 break;
2739
2740 default:
2741 return NULL;
2742 }
2743 p.x = x;
2744 p.y = y;
2745
2746 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2747 fz_invert_matrix (&ctm, &ctm);
2748 fz_transform_point (&p, &ctm);
2749
2750 for (link = links; link; link = link->next) {
2751 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2752 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2753 return link;
2754 }
2755 }
2756 }
2757 return NULL;
2758 }
2759
2760 static void ensuretext (struct page *page)
2761 {
2762 if (state.gen != page->tgen) {
2763 droptext (page);
2764 page->tgen = state.gen;
2765 }
2766 if (!page->text) {
2767 fz_matrix ctm;
2768 fz_device *tdev;
2769
2770 page->text = fz_new_text_page (state.ctx);
2771 page->sheet = fz_new_text_sheet (state.ctx);
2772 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2773 ctm = pagectm (page);
2774 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2775 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2776 qsort (page->text->blocks, page->text->len,
2777 sizeof (*page->text->blocks), compareblocks);
2778 fz_end_page (tdev);
2779 fz_free_device (tdev);
2780 }
2781 }
2782
2783 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2784 {
2785 CAMLparam2 (start_page_v, dir_v);
2786 CAMLlocal1 (ret_v);
2787 int i, dir = Int_val (dir_v);
2788 int start_page = Int_val (start_page_v);
2789 int end_page = dir > 0 ? state.pagecount : -1;
2790
2791 ret_v = Val_int (0);
2792 if (!(state.type == DPDF || state.type == DXPS)) {
2793 goto done;
2794 }
2795
2796 lock ("ml_findpage_with_links");
2797 for (i = start_page + dir; i != end_page; i += dir) {
2798 int found;
2799
2800 switch (state.type) {
2801 case DPDF:
2802 {
2803 pdf_page *page = NULL;
2804
2805 fz_try (state.ctx) {
2806 page = pdf_load_page (state.u.pdf, i);
2807 found = !!page->links;
2808 }
2809 fz_catch (state.ctx) {
2810 found = 0;
2811 }
2812 if (page) {
2813 freepdfpage (page);
2814 }
2815 }
2816 break;
2817 case DXPS:
2818 {
2819 xps_page *page = xps_load_page (state.u.xps, i);
2820 found = !!page->links;
2821 freexpspage (page);
2822 }
2823 break;
2824
2825 default:
2826 ARSERT (0 && "invalid document type");
2827 }
2828
2829 if (found) {
2830 ret_v = caml_alloc_small (1, 1);
2831 Field (ret_v, 0) = Val_int (i);
2832 goto unlock;
2833 }
2834 }
2835 unlock:
2836 unlock ("ml_findpage_with_links");
2837
2838 done:
2839 CAMLreturn (ret_v);
2840 }
2841
2842 enum { dir_first, dir_last };
2843 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2844
2845 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2846 {
2847 CAMLparam2 (ptr_v, dir_v);
2848 CAMLlocal2 (ret_v, pos_v);
2849 struct page *page;
2850 int dirtag, i, slinkindex;
2851 struct slink *found = NULL ,*slink;
2852 char *s = String_val (ptr_v);
2853
2854 page = parse_pointer ("ml_findlink", s);
2855 ret_v = Val_int (0);
2856 if (trylock ("ml_findlink")) {
2857 goto done;
2858 }
2859
2860 ensureslinks (page);
2861
2862 if (Is_block (dir_v)) {
2863 dirtag = Tag_val (dir_v);
2864 switch (dirtag) {
2865 case dir_first_visible:
2866 {
2867 int x0, y0, dir, first_index, last_index;
2868
2869 pos_v = Field (dir_v, 0);
2870 x0 = Int_val (Field (pos_v, 0));
2871 y0 = Int_val (Field (pos_v, 1));
2872 dir = Int_val (Field (pos_v, 2));
2873
2874 if (dir >= 0) {
2875 dir = 1;
2876 first_index = 0;
2877 last_index = page->slinkcount;
2878 }
2879 else {
2880 first_index = page->slinkcount - 1;
2881 last_index = -1;
2882 }
2883
2884 for (i = first_index; i != last_index; i += dir) {
2885 slink = &page->slinks[i];
2886 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2887 found = slink;
2888 break;
2889 }
2890 }
2891 }
2892 break;
2893
2894 case dir_left:
2895 slinkindex = Int_val (Field (dir_v, 0));
2896 found = &page->slinks[slinkindex];
2897 for (i = slinkindex - 1; i >= 0; --i) {
2898 slink = &page->slinks[i];
2899 if (slink->bbox.x0 < found->bbox.x0) {
2900 found = slink;
2901 break;
2902 }
2903 }
2904 break;
2905
2906 case dir_right:
2907 slinkindex = Int_val (Field (dir_v, 0));
2908 found = &page->slinks[slinkindex];
2909 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2910 slink = &page->slinks[i];
2911 if (slink->bbox.x0 > found->bbox.x0) {
2912 found = slink;
2913 break;
2914 }
2915 }
2916 break;
2917
2918 case dir_down:
2919 slinkindex = Int_val (Field (dir_v, 0));
2920 found = &page->slinks[slinkindex];
2921 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2922 slink = &page->slinks[i];
2923 if (slink->bbox.y0 >= found->bbox.y0) {
2924 found = slink;
2925 break;
2926 }
2927 }
2928 break;
2929
2930 case dir_up:
2931 slinkindex = Int_val (Field (dir_v, 0));
2932 found = &page->slinks[slinkindex];
2933 for (i = slinkindex - 1; i >= 0; --i) {
2934 slink = &page->slinks[i];
2935 if (slink->bbox.y0 <= found->bbox.y0) {
2936 found = slink;
2937 break;
2938 }
2939 }
2940 break;
2941 }
2942 }
2943 else {
2944 dirtag = Int_val (dir_v);
2945 switch (dirtag) {
2946 case dir_first:
2947 found = page->slinks;
2948 break;
2949
2950 case dir_last:
2951 if (page->slinks) {
2952 found = page->slinks + (page->slinkcount - 1);
2953 }
2954 break;
2955 }
2956 }
2957 if (found) {
2958 ret_v = caml_alloc_small (2, 1);
2959 Field (ret_v, 0) = Val_int (found - page->slinks);
2960 }
2961
2962 unlock ("ml_findlink");
2963 done:
2964 CAMLreturn (ret_v);
2965 }
2966
2967 enum { uuri, ugoto, utext, uunexpected,
2968 ulaunch, unamed, uremote, uremotedest };
2969
2970 #define LINKTOVAL \
2971 { \
2972 int pageno; \
2973 \
2974 switch (link->dest.kind) { \
2975 case FZ_LINK_GOTO: \
2976 { \
2977 fz_point p; \
2978 \
2979 pageno = link->dest.ld.gotor.page; \
2980 p.x = 0; \
2981 p.y = 0; \
2982 \
2983 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2984 p.y = link->dest.ld.gotor.lt.y; \
2985 fz_transform_point (&p, &pdim->lctm); \
2986 if (p.y < 0) p.y = 0; \
2987 } \
2988 tup_v = caml_alloc_tuple (2); \
2989 ret_v = caml_alloc_small (1, ugoto); \
2990 Field (tup_v, 0) = Val_int (pageno); \
2991 Field (tup_v, 1) = Val_int (p.y); \
2992 Field (ret_v, 0) = tup_v; \
2993 } \
2994 break; \
2995 \
2996 case FZ_LINK_URI: \
2997 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2998 ret_v = caml_alloc_small (1, uuri); \
2999 Field (ret_v, 0) = str_v; \
3000 break; \
3001 \
3002 case FZ_LINK_LAUNCH: \
3003 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
3004 ret_v = caml_alloc_small (1, ulaunch); \
3005 Field (ret_v, 0) = str_v; \
3006 break; \
3007 \
3008 case FZ_LINK_NAMED: \
3009 str_v = caml_copy_string (link->dest.ld.named.named); \
3010 ret_v = caml_alloc_small (1, unamed); \
3011 Field (ret_v, 0) = str_v; \
3012 break; \
3013 \
3014 case FZ_LINK_GOTOR: \
3015 { \
3016 int rty; \
3017 \
3018 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
3019 pageno = link->dest.ld.gotor.page; \
3020 if (pageno == -1) { \
3021 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
3022 rty = uremotedest; \
3023 } \
3024 else { \
3025 gr_v = Val_int (pageno); \
3026 rty = uremote; \
3027 } \
3028 tup_v = caml_alloc_tuple (2); \
3029 ret_v = caml_alloc_small (1, rty); \
3030 Field (tup_v, 0) = str_v; \
3031 Field (tup_v, 1) = gr_v; \
3032 Field (ret_v, 0) = tup_v; \
3033 } \
3034 break; \
3035 \
3036 default: \
3037 { \
3038 char buf[80]; \
3039 \
3040 snprintf (buf, sizeof (buf), \
3041 "unhandled link kind %d", link->dest.kind); \
3042 str_v = caml_copy_string (buf); \
3043 ret_v = caml_alloc_small (1, uunexpected); \
3044 Field (ret_v, 0) = str_v; \
3045 } \
3046 break; \
3047 } \
3048 }
3049
3050 CAMLprim value ml_getlink (value ptr_v, value n_v)
3051 {
3052 CAMLparam2 (ptr_v, n_v);
3053 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3054 fz_link *link;
3055 struct page *page;
3056 struct pagedim *pdim;
3057 char *s = String_val (ptr_v);
3058
3059 ret_v = Val_int (0);
3060 if (trylock ("ml_getlink")) {
3061 goto done;
3062 }
3063
3064 page = parse_pointer ("ml_getlink", s);
3065 ensureslinks (page);
3066 pdim = &state.pagedims[page->pdimno];
3067 link = page->slinks[Int_val (n_v)].link;
3068 LINKTOVAL;
3069
3070 unlock ("ml_getlink");
3071 done:
3072 CAMLreturn (ret_v);
3073 }
3074
3075 CAMLprim value ml_getlinkcount (value ptr_v)
3076 {
3077 CAMLparam1 (ptr_v);
3078 struct page *page;
3079 char *s = String_val (ptr_v);
3080
3081 page = parse_pointer ("ml_getlinkcount", s);
3082 CAMLreturn (Val_int (page->slinkcount));
3083 }
3084
3085 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
3086 {
3087 CAMLparam2 (ptr_v, n_v);
3088 CAMLlocal1 (ret_v);
3089 struct page *page;
3090 struct slink *slink;
3091 char *s = String_val (ptr_v);
3092
3093 page = parse_pointer ("ml_getlinkrect", s);
3094 ret_v = caml_alloc_tuple (4);
3095 if (trylock ("ml_getlinkrect")) {
3096 Field (ret_v, 0) = Val_int (0);
3097 Field (ret_v, 1) = Val_int (0);
3098 Field (ret_v, 2) = Val_int (0);
3099 Field (ret_v, 3) = Val_int (0);
3100 goto done;
3101 }
3102 ensureslinks (page);
3103
3104 slink = &page->slinks[Int_val (n_v)];
3105 Field (ret_v, 0) = Val_int (slink->bbox.x0);
3106 Field (ret_v, 1) = Val_int (slink->bbox.y0);
3107 Field (ret_v, 2) = Val_int (slink->bbox.x1);
3108 Field (ret_v, 3) = Val_int (slink->bbox.y1);
3109 unlock ("ml_getlinkrect");
3110
3111 done:
3112 CAMLreturn (ret_v);
3113 }
3114
3115 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3116 {
3117 CAMLparam3 (ptr_v, x_v, y_v);
3118 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3119 fz_link *link;
3120 struct page *page;
3121 char *s = String_val (ptr_v);
3122 int x = Int_val (x_v), y = Int_val (y_v);
3123 struct pagedim *pdim;
3124
3125 ret_v = Val_int (0);
3126 if (trylock ("ml_whatsunder")) {
3127 goto done;
3128 }
3129
3130 page = parse_pointer ("ml_whatsunder", s);
3131 pdim = &state.pagedims[page->pdimno];
3132 x += pdim->bounds.x0;
3133 y += pdim->bounds.y0;
3134 link = getlink (page, x, y);
3135 if (link) {
3136 LINKTOVAL;
3137 }
3138 else {
3139 fz_rect *b;
3140 fz_page_block *pageb;
3141 fz_text_block *block;
3142
3143 ensuretext (page);
3144 for (pageb = page->text->blocks;
3145 pageb < page->text->blocks + page->text->len;
3146 ++pageb) {
3147 fz_text_line *line;
3148 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3149 block = pageb->u.text;
3150
3151 b = &block->bbox;
3152 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3153 continue;
3154
3155 for (line = block->lines;
3156 line < block->lines + block->len;
3157 ++line) {
3158 fz_text_span *span;
3159
3160 b = &line->bbox;
3161 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3162 continue;
3163
3164 for (span = line->first_span; span; span = span->next) {
3165 int charnum;
3166
3167 b = &span->bbox;
3168 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3169 continue;
3170
3171 for (charnum = 0; charnum < span->len; ++charnum) {
3172 fz_rect bbox;
3173 fz_text_char_bbox (&bbox, span, charnum);
3174 b = &bbox;
3175
3176 if (x >= b->x0 && x <= b->x1
3177 && y >= b->y0 && y <= b->y1) {
3178 fz_text_style *style = span->text->style;
3179 const char *n2 =
3180 style->font && style->font->name
3181 ? style->font->name
3182 : "Span has no font name"
3183 ;
3184 FT_FaceRec *face = style->font->ft_face;
3185 if (face && face->family_name) {
3186 char *s;
3187 char *n1 = face->family_name;
3188 size_t l1 = strlen (n1);
3189 size_t l2 = strlen (n2);
3190
3191 if (l1 != l2 || memcmp (n1, n2, l1)) {
3192 s = malloc (l1 + l2 + 2);
3193 if (s) {
3194 memcpy (s, n2, l2);
3195 s[l2] = '=';
3196 memcpy (s + l2 + 1, n1, l1 + 1);
3197 str_v = caml_copy_string (s);
3198 free (s);
3199 }
3200 }
3201 }
3202 if (str_v == 0) {
3203 str_v = caml_copy_string (n2);
3204 }
3205 ret_v = caml_alloc_small (1, utext);
3206 Field (ret_v, 0) = str_v;
3207 goto unlock;
3208 }
3209 }
3210 }
3211 }
3212 }
3213 }
3214 unlock:
3215 unlock ("ml_whatsunder");
3216
3217 done:
3218 CAMLreturn (ret_v);
3219 }
3220
3221 enum { mark_page, mark_block, mark_line, mark_word };
3222
3223 static int uninteresting (int c)
3224 {
3225 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3226 || ispunct (c);
3227 }
3228
3229 CAMLprim value ml_clearmark (value ptr_v)
3230 {
3231 CAMLparam1 (ptr_v);
3232 char *s = String_val (ptr_v);
3233 struct page *page;
3234
3235 if (trylock ("ml_clearmark")) {
3236 goto done;
3237 }
3238
3239 page = parse_pointer ("ml_clearmark", s);
3240 page->fmark.span = NULL;
3241 page->lmark.span = NULL;
3242 page->fmark.i = 0;
3243 page->lmark.i = 0;
3244
3245 unlock ("ml_clearmark");
3246 done:
3247 CAMLreturn (Val_unit);
3248 }
3249
3250 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3251 {
3252 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3253 CAMLlocal1 (ret_v);
3254 fz_rect *b;
3255 struct page *page;
3256 fz_text_line *line;
3257 fz_page_block *pageb;
3258 fz_text_block *block;
3259 struct pagedim *pdim;
3260 int mark = Int_val (mark_v);
3261 char *s = String_val (ptr_v);
3262 int x = Int_val (x_v), y = Int_val (y_v);
3263
3264 ret_v = Val_bool (0);
3265 if (trylock ("ml_markunder")) {
3266 goto done;
3267 }
3268
3269 page = parse_pointer ("ml_markunder", s);
3270 pdim = &state.pagedims[page->pdimno];
3271
3272 ensuretext (page);
3273
3274 if (mark == mark_page) {
3275 int i;
3276 fz_page_block *pb1 = NULL, *pb2 = NULL;
3277
3278 for (i = 0; i < page->text->len; ++i) {
3279 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3280 pb1 = &page->text->blocks[i];
3281 break;
3282 }
3283 }
3284 if (!pb1) goto unlock;
3285
3286 for (i = page->text->len - 1; i >= 0; --i) {
3287 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3288 pb2 = &page->text->blocks[i];
3289 break;
3290 }
3291 }
3292 if (!pb2) goto unlock;
3293
3294 block = pb1->u.text;
3295
3296 page->fmark.i = 0;
3297 page->fmark.span = block->lines->first_span;
3298
3299 block = pb2->u.text;
3300 line = &block->lines[block->len - 1];
3301 page->lmark.i = line->last_span->len - 1;
3302 page->lmark.span = line->last_span;
3303 ret_v = Val_bool (1);
3304 goto unlock;
3305 }
3306
3307 x += pdim->bounds.x0;
3308 y += pdim->bounds.y0;
3309
3310 for (pageb = page->text->blocks;
3311 pageb < page->text->blocks + page->text->len;
3312 ++pageb) {
3313 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3314 block = pageb->u.text;
3315
3316 b = &block->bbox;
3317 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3318 continue;
3319
3320 if (mark == mark_block) {
3321 page->fmark.i = 0;
3322 page->fmark.span = block->lines->first_span;
3323
3324 line = &block->lines[block->len - 1];
3325 page->lmark.i = line->last_span->len - 1;
3326 page->lmark.span = line->last_span;
3327 ret_v = Val_bool (1);
3328 goto unlock;
3329 }
3330
3331 for (line = block->lines;
3332 line < block->lines + block->len;
3333 ++line) {
3334 fz_text_span *span;
3335
3336 b = &line->bbox;
3337 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3338 continue;
3339
3340 if (mark == mark_line) {
3341 page->fmark.i = 0;
3342 page->fmark.span = line->first_span;
3343
3344 page->lmark.i = line->last_span->len - 1;
3345 page->lmark.span = line->last_span;
3346 ret_v = Val_bool (1);
3347 goto unlock;
3348 }
3349
3350 for (span = line->first_span; span; span = span->next) {
3351 int charnum;
3352
3353 b = &span->bbox;
3354 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3355 continue;
3356
3357 for (charnum = 0; charnum < span->len; ++charnum) {
3358 fz_rect bbox;
3359 fz_text_char_bbox (&bbox, span, charnum);
3360 b = &bbox;
3361
3362 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3363 /* unicode ftw */
3364 int charnum2, charnum3 = -1, charnum4 = -1;
3365
3366 if (uninteresting (span->text[charnum].c)) goto unlock;
3367
3368 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3369 if (uninteresting (span->text[charnum2].c)) {
3370 charnum3 = charnum2 + 1;
3371 break;
3372 }
3373 }
3374 if (charnum3 == -1) charnum3 = 0;
3375
3376 for (charnum2 = charnum + 1;
3377 charnum2 < span->len;
3378 ++charnum2) {
3379 if (uninteresting (span->text[charnum2].c)) break;
3380 charnum4 = charnum2;
3381 }
3382 if (charnum4 == -1) goto unlock;
3383
3384 page->fmark.i = charnum3;
3385 page->fmark.span = span;
3386
3387 page->lmark.i = charnum4;
3388 page->lmark.span = span;
3389 ret_v = Val_bool (1);
3390 goto unlock;
3391 }
3392 }
3393 }
3394 }
3395 }
3396 unlock:
3397 if (!Bool_val (ret_v)) {
3398 page->fmark.span = NULL;
3399 page->lmark.span = NULL;
3400 page->fmark.i = 0;
3401 page->lmark.i = 0;
3402 }
3403 unlock ("ml_markunder");
3404
3405 done:
3406 CAMLreturn (ret_v);
3407 }
3408
3409 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3410 {
3411 CAMLparam3 (ptr_v, x_v, y_v);
3412 CAMLlocal2 (ret_v, res_v);
3413 fz_rect *b = NULL;
3414 struct page *page;
3415 fz_page_block *pageb;
3416 struct pagedim *pdim;
3417 char *s = String_val (ptr_v);
3418 int x = Int_val (x_v), y = Int_val (y_v);
3419
3420 ret_v = Val_int (0);
3421 if (trylock ("ml_rectofblock")) {
3422 goto done;
3423 }
3424
3425 page = parse_pointer ("ml_rectofblock", s);
3426 pdim = &state.pagedims[page->pdimno];
3427 x += pdim->bounds.x0;
3428 y += pdim->bounds.y0;
3429
3430 ensuretext (page);
3431
3432 for (pageb = page->text->blocks;
3433 pageb < page->text->blocks + page->text->len;
3434 ++pageb) {
3435 switch (pageb->type) {
3436 case FZ_PAGE_BLOCK_TEXT:
3437 b = &pageb->u.text->bbox;
3438 break;
3439
3440 case FZ_PAGE_BLOCK_IMAGE:
3441 b = &pageb->u.image->bbox;
3442 break;
3443
3444 default:
3445 continue;
3446 }
3447
3448 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3449 break;
3450 b = NULL;
3451 }
3452 if (b) {
3453 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3454 ret_v = caml_alloc_small (1, 1);
3455 Store_double_field (res_v, 0, b->x0);
3456 Store_double_field (res_v, 1, b->x1);
3457 Store_double_field (res_v, 2, b->y0);
3458 Store_double_field (res_v, 3, b->y1);
3459 Field (ret_v, 0) = res_v;
3460 }
3461 unlock ("ml_rectofblock");
3462
3463 done:
3464 CAMLreturn (ret_v);
3465 }
3466
3467 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3468 {
3469 CAMLparam2 (ptr_v, rect_v);
3470 fz_rect b;
3471 struct page *page;
3472 struct pagedim *pdim;
3473 char *s = String_val (ptr_v);
3474 int i, x0, x1, y0, y1, fi, li;
3475 fz_text_line *line;
3476 fz_page_block *pageb;
3477 fz_text_block *block;
3478 fz_text_span *span, *fspan, *lspan;
3479
3480 if (trylock ("ml_seltext")) {
3481 goto done;
3482 }
3483
3484 page = parse_pointer ("ml_seltext", s);
3485 ensuretext (page);
3486
3487 pdim = &state.pagedims[page->pdimno];
3488 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3489 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3490 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3491 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3492
3493 if (y0 > y1) {
3494 int t = y0;
3495 y0 = y1;
3496 y1 = t;
3497 x0 = x1;
3498 x1 = t;
3499 }
3500
3501 if (0) {
3502 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3503 glColor3ub (128, 128, 128);
3504 recti (x0, y0, x1, y1);
3505 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3506 }
3507
3508 fi = page->fmark.i;
3509 fspan = page->fmark.span;
3510
3511 li = page->lmark.i;
3512 lspan = page->lmark.span;
3513
3514 for (pageb = page->text->blocks;
3515 pageb < page->text->blocks + page->text->len;
3516 ++pageb) {
3517 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3518 block = pageb->u.text;
3519 for (line = block->lines;
3520 line < block->lines + block->len;
3521 ++line) {
3522 fz_text_span *span;
3523
3524 for (span = line->first_span; span; span = span->next) {
3525 for (i = 0; i < span->len; ++i) {
3526 int selected = 0;
3527
3528 fz_text_char_bbox (&b, span, i);
3529
3530 if (x0 >= b.x0 && x0 <= b.x1
3531 && y0 >= b.y0 && y0 <= b.y1) {
3532 fspan = span;
3533 fi = i;
3534 selected = 1;
3535 }
3536 if (x1 >= b.x0 && x1 <= b.x1
3537 && y1 >= b.y0 && y1 <= b.y1) {
3538 lspan = span;
3539 li = i;
3540 selected = 1;
3541 }
3542 if (0 && selected) {
3543 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3544 glColor3ub (128, 128, 128);
3545 recti (b.x0, b.y0, b.x1, b.y1);
3546 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3547 }
3548 }
3549 }
3550 }
3551 }
3552 if (x1 < x0 && fspan == lspan) {
3553 i = fi;
3554 span = fspan;
3555
3556 fi = li;
3557 fspan = lspan;
3558
3559 li = i;
3560 lspan = span;
3561 }
3562
3563 page->fmark.i = fi;
3564 page->fmark.span = fspan;
3565
3566 page->lmark.i = li;
3567 page->lmark.span = lspan;
3568
3569 unlock ("ml_seltext");
3570
3571 done:
3572 CAMLreturn (Val_unit);
3573 }
3574
3575 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3576 {
3577 char buf[4];
3578 int i, len, ret;
3579
3580 for (i = a; i <= b; ++i) {
3581 len = fz_runetochar (buf, span->text[i].c);
3582 ret = fwrite (buf, len, 1, f);
3583
3584 if (ret != 1) {
3585 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3586 len, ret, strerror (errno));
3587 return -1;
3588 }
3589 }
3590 return 0;
3591 }
3592
3593 #ifdef __CYGWIN__
3594 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3595 {
3596 caml_failwith ("ml_popen not implemented under Cygwin");
3597 }
3598 #else
3599 CAMLprim value ml_popen (value command_v, value fds_v)
3600 {
3601 CAMLparam2 (command_v, fds_v);
3602 CAMLlocal2 (l_v, tup_v);
3603 int ret;
3604 char *msg = NULL;
3605 value earg_v = Nothing;
3606 posix_spawnattr_t attr;
3607 posix_spawn_file_actions_t fa;
3608 char *argv[] = { "/bin/sh", "-c", NULL, NULL };
3609
3610 argv[2] = String_val (command_v);
3611
3612 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3613 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3614 }
3615
3616 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3617 msg = "posix_spawnattr_init";
3618 goto fail1;
3619 }
3620
3621 #ifdef POSIX_SPAWN_USEVFORK
3622 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3623 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3624 goto fail;
3625 }
3626 #endif
3627
3628 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3629 int fd1, fd2;
3630
3631 tup_v = Field (l_v, 0);
3632 fd1 = Int_val (Field (tup_v, 0));
3633 fd2 = Int_val (Field (tup_v, 1));
3634 if (fd2 < 0) {
3635 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3636 msg = "posix_spawn_file_actions_addclose";
3637 earg_v = tup_v;
3638 goto fail;
3639 }
3640 }
3641 else {
3642 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3643 msg = "posix_spawn_file_actions_adddup2";
3644 earg_v = tup_v;
3645 goto fail;
3646 }
3647 }
3648 }
3649
3650 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3651 msg = "posix_spawn";
3652 goto fail;
3653 }
3654
3655 fail:
3656 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3657 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3658 }
3659
3660 fail1:
3661 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3662 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3663 strerror (ret));
3664 }
3665
3666 if (msg)
3667 unix_error (ret, msg, earg_v);
3668
3669 CAMLreturn (Val_unit);
3670 }
3671 #endif
3672
3673 CAMLprim value ml_hassel (value ptr_v)
3674 {
3675 CAMLparam1 (ptr_v);
3676 CAMLlocal1 (ret_v);
3677 struct page *page;
3678 char *s = String_val (ptr_v);
3679
3680 ret_v = Val_bool (0);
3681 if (trylock ("ml_hassel")) {
3682 goto done;
3683 }
3684
3685 page = parse_pointer ("ml_hassel", s);
3686 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3687 unlock ("ml_hassel");
3688 done:
3689 CAMLreturn (ret_v);
3690 }
3691
3692 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3693 {
3694 CAMLparam2 (fd_v, ptr_v);
3695 FILE *f;
3696 int seen = 0;
3697 struct page *page;
3698 fz_text_line *line;
3699 fz_page_block *pageb;
3700 fz_text_block *block;
3701 int fd = Int_val (fd_v);
3702 char *s = String_val (ptr_v);
3703
3704 if (trylock ("ml_copysel")) {
3705 goto done;
3706 }
3707
3708 page = parse_pointer ("ml_copysel", s);
3709
3710 if (!page->fmark.span || !page->lmark.span) {
3711 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3712 goto unlock;
3713 }
3714
3715 f = fdopen (fd, "w");
3716 if (!f) {
3717 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3718 fd, strerror (errno));
3719 f = stdout;
3720 }
3721
3722 for (pageb = page->text->blocks;
3723 pageb < page->text->blocks + page->text->len;
3724 ++pageb) {
3725 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3726 block = pageb->u.text;
3727 for (line = block->lines;
3728 line < block->lines + block->len;
3729 ++line) {
3730 fz_text_span *span;
3731
3732 for (span = line->first_span; span; span = span->next) {
3733 int a, b;
3734
3735 seen |= span == page->fmark.span || span == page->lmark.span;
3736 a = span == page->fmark.span ? page->fmark.i : 0;
3737 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3738
3739 if (seen) {
3740 if (pipespan (f, span, a, b)) {
3741 goto close;
3742 }
3743 if (span == page->lmark.span) {
3744 goto close;
3745 }
3746 if (span == line->last_span) {
3747 if (putc ('\n', f) == EOF) {
3748 fprintf (stderr,
3749 "failed break line on sel pipe: %s\n",
3750 strerror (errno));
3751 goto close;
3752 }
3753 }
3754 }
3755 }
3756 }
3757 }
3758 close:
3759 if (f != stdout) {
3760 int ret = fclose (f);
3761 fd = -1;
3762 if (ret == -1) {
3763 if (errno != ECHILD) {
3764 fprintf (stderr, "failed to close sel pipe: %s\n",
3765 strerror (errno));
3766 }
3767 }
3768 }
3769 unlock:
3770 unlock ("ml_copysel");
3771
3772 done:
3773 if (fd >= 0) {
3774 if (close (fd)) {
3775 fprintf (stderr, "failed to close sel pipe: %s\n",
3776 strerror (errno));
3777 }
3778 }
3779 CAMLreturn (Val_unit);
3780 }
3781
3782 CAMLprim value ml_getpdimrect (value pagedimno_v)
3783 {
3784 CAMLparam1 (pagedimno_v);
3785 CAMLlocal1 (ret_v);
3786 int pagedimno = Int_val (pagedimno_v);
3787 fz_rect box;
3788
3789 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3790 if (trylock ("ml_getpdimrect")) {
3791 box = fz_empty_rect;
3792 }
3793 else {
3794 box = state.pagedims[pagedimno].mediabox;
3795 unlock ("ml_getpdimrect");
3796 }
3797
3798 Store_double_field (ret_v, 0, box.x0);
3799 Store_double_field (ret_v, 1, box.x1);
3800 Store_double_field (ret_v, 2, box.y0);
3801 Store_double_field (ret_v, 3, box.y1);
3802
3803 CAMLreturn (ret_v);
3804 }
3805
3806 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3807 value dw_v, value cols_v)
3808 {
3809 CAMLparam3 (winw_v, winh_v, dw_v);
3810 CAMLlocal1 (ret_v);
3811 int i;
3812 double zoom = -1.;
3813 double maxh = 0.0;
3814 struct pagedim *p;
3815 double winw = Int_val (winw_v);
3816 double winh = Int_val (winh_v);
3817 double dw = Int_val (dw_v);
3818 double cols = Int_val (cols_v);
3819 double pw = 1.0, ph = 1.0;
3820
3821 if (trylock ("ml_zoom_for_height")) {
3822 goto done;
3823 }
3824
3825 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3826 double w = p->pagebox.x1 / cols;
3827 double h = p->pagebox.y1;
3828 if (h > maxh) {
3829 maxh = h;
3830 ph = h;
3831 if (state.fitmodel != FitProportional) pw = w;
3832 }
3833 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3834 }
3835
3836 zoom = (((winh / ph) * pw) + dw) / winw;
3837 unlock ("ml_zoom_for_height");
3838 done:
3839 ret_v = caml_copy_double (zoom);
3840 CAMLreturn (ret_v);
3841 }
3842
3843 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3844 {
3845 CAMLparam4 (pt_v, x_v, y_v, string_v);
3846 CAMLlocal1 (ret_v);
3847 int pt = Int_val(pt_v);
3848 int x = Int_val (x_v);
3849 int y = Int_val (y_v);
3850 double w;
3851
3852 w = draw_string (state.face, pt, x, y, String_val (string_v));
3853 ret_v = caml_copy_double (w);
3854 CAMLreturn (ret_v);
3855 }
3856
3857 CAMLprim value ml_measure_string (value pt_v, value string_v)
3858 {
3859 CAMLparam2 (pt_v, string_v);
3860 CAMLlocal1 (ret_v);
3861 int pt = Int_val (pt_v);
3862 double w;
3863
3864 w = measure_string (state.face, pt, String_val (string_v));
3865 ret_v = caml_copy_double (w);
3866 CAMLreturn (ret_v);
3867 }
3868
3869 CAMLprim value ml_getpagebox (value opaque_v)
3870 {
3871 CAMLparam1 (opaque_v);
3872 CAMLlocal1 (ret_v);
3873 fz_rect rect;
3874 fz_irect bbox;
3875 fz_matrix ctm;
3876 fz_device *dev;
3877 char *s = String_val (opaque_v);
3878 struct page *page = parse_pointer ("ml_getpagebox", s);
3879
3880 ret_v = caml_alloc_tuple (4);
3881 dev = fz_new_bbox_device (state.ctx, &rect);
3882 dev->hints |= FZ_IGNORE_SHADE;
3883
3884 switch (page->type) {
3885 case DPDF:
3886 ctm = pagectm (page);
3887 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3888 break;
3889
3890 case DXPS:
3891 ctm = pagectm (page);
3892 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3893 break;
3894
3895 default:
3896 rect = fz_infinite_rect;
3897 break;
3898 }
3899
3900 fz_free_device (dev);
3901 fz_round_rect (&bbox, &rect);
3902 Field (ret_v, 0) = Val_int (bbox.x0);
3903 Field (ret_v, 1) = Val_int (bbox.y0);
3904 Field (ret_v, 2) = Val_int (bbox.x1);
3905 Field (ret_v, 3) = Val_int (bbox.y1);
3906
3907 CAMLreturn (ret_v);
3908 }
3909
3910 CAMLprim value ml_setaalevel (value level_v)
3911 {
3912 CAMLparam1 (level_v);
3913
3914 state.aalevel = Int_val (level_v);
3915 CAMLreturn (Val_unit);
3916 }
3917
3918 #pragma GCC diagnostic push
3919 #pragma GCC diagnostic ignored "-Wvariadic-macros"
3920 #include <X11/Xlib.h>
3921 #pragma GCC diagnostic pop
3922
3923 #include <GL/glx.h>
3924
3925 static struct {
3926 Window wid;
3927 Display *dpy;
3928 GLXContext ctx;
3929 XVisualInfo *visual;
3930 } glx;
3931
3932 CAMLprim value ml_glxinit (value display_v, value wid_v, value screen_v)
3933 {
3934 CAMLparam3 (display_v, wid_v, screen_v);
3935 int attribs[] = {GLX_RGBA, GLX_DOUBLEBUFFER, None};
3936
3937 glx.dpy = XOpenDisplay (String_val (display_v));
3938 if (!glx.dpy) {
3939 caml_failwith ("XOpenDisplay");
3940 }
3941
3942 glx.visual = glXChooseVisual (glx.dpy, Int_val (screen_v), attribs);
3943 if (!glx.visual) {
3944 XCloseDisplay (glx.dpy);
3945 caml_failwith ("glXChooseVisual");
3946 }
3947
3948 glx.wid = Int_val (wid_v);
3949 CAMLreturn (Val_int (glx.visual->visualid));
3950 }
3951
3952 CAMLprim value ml_glxcompleteinit (value unit_v)
3953 {
3954 CAMLparam1 (unit_v);
3955
3956 glx.ctx = glXCreateContext (glx.dpy, glx.visual, NULL, True);
3957 if (!glx.ctx) {
3958 caml_failwith ("glXCreateContext");
3959 }
3960
3961 XFree (glx.visual);
3962 glx.visual = NULL;
3963
3964 if (!glXMakeCurrent (glx.dpy, glx.wid, glx.ctx)) {
3965 glXDestroyContext (glx.dpy, glx.ctx);
3966 glx.ctx = NULL;
3967 caml_failwith ("glXMakeCurrent");
3968 }
3969 CAMLreturn (Val_unit);
3970 }
3971
3972 CAMLprim value ml_swapb (value unit_v)
3973 {
3974 CAMLparam1 (unit_v);
3975 glXSwapBuffers (glx.dpy, glx.wid);
3976 CAMLreturn (Val_unit);
3977 }
3978
3979 #include "keysym2ucs.c"
3980
3981 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3982 {
3983 CAMLparam1 (keysym_v);
3984 CAMLlocal1 (str_v);
3985 KeySym keysym = Int_val (keysym_v);
3986 Rune rune;
3987 int len;
3988 char buf[5];
3989
3990 rune = keysym2ucs (keysym);
3991 len = fz_runetochar (buf, rune);
3992 buf[len] = 0;
3993 str_v = caml_copy_string (buf);
3994 CAMLreturn (str_v);
3995 }
3996
3997 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3998 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3999
4000 CAMLprim value ml_platform (value unit_v)
4001 {
4002 CAMLparam1 (unit_v);
4003 int platid = piunknown;
4004
4005 #if defined __linux__
4006 platid = pilinux;
4007 #elif defined __CYGWIN__
4008 platid = picygwin;
4009 #elif defined __DragonFly__
4010 platid = pidragonflybsd;
4011 #elif defined __FreeBSD__
4012 platid = pifreebsd;
4013 #elif defined __OpenBSD__
4014 platid = piopenbsd;
4015 #elif defined __NetBSD__
4016 platid = pinetbsd;
4017 #elif defined __sun__
4018 platid = pisun;
4019 #elif defined __APPLE__
4020 platid = piosx;
4021 #endif
4022 CAMLreturn (Val_int (platid));
4023 }
4024
4025 CAMLprim value ml_cloexec (value fd_v)
4026 {
4027 CAMLparam1 (fd_v);
4028 int fd = Int_val (fd_v);
4029
4030 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
4031 uerror ("fcntl", Nothing);
4032 }
4033 CAMLreturn (Val_unit);
4034 }
4035
4036 CAMLprim value ml_getpbo (value w_v, value h_v, value cs_v)
4037 {
4038 CAMLparam2 (w_v, h_v);
4039 CAMLlocal1 (ret_v);
4040 struct pbo *pbo;
4041 int w = Int_val (w_v);
4042 int h = Int_val (h_v);
4043 int cs = Int_val (cs_v);
4044
4045 if (state.pbo_usable) {
4046 pbo = calloc (sizeof (*pbo), 1);
4047 if (!pbo) {
4048 err (1, "calloc pbo");
4049 }
4050
4051 switch (cs) {
4052 case 0:
4053 case 1:
4054 pbo->size = w*h*4;
4055 break;
4056 case 2:
4057 pbo->size = w*h*2;
4058 break;
4059 default:
4060 errx (1, "ml_getpbo: invalid colorspace %d", cs);
4061 }
4062
4063 state.glGenBuffersARB (1, &pbo->id);
4064 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->id);
4065 state.glBufferDataARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->size,
4066 NULL, GL_STREAM_DRAW);
4067 pbo->ptr = state.glMapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB,
4068 GL_READ_WRITE);
4069 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4070 if (!pbo->ptr) {
4071 fprintf (stderr, "glMapBufferARB failed: %#x\n", glGetError ());
4072 state.glDeleteBuffersARB (1, &pbo->id);
4073 free (pbo);
4074 ret_v = caml_copy_string ("0");
4075 }
4076 else {
4077 int res;
4078 char *s;
4079
4080 res = snprintf (NULL, 0, "%" FMT_ptr, FMT_ptr_cast (pbo));
4081 if (res < 0) {
4082 err (1, "snprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4083 }
4084 s = malloc (res+1);
4085 if (!s) {
4086 err (1, "malloc %d bytes failed", res+1);
4087 }
4088 res = sprintf (s, "%" FMT_ptr, FMT_ptr_cast (pbo));
4089 if (res < 0) {
4090 err (1, "sprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4091 }
4092 ret_v = caml_copy_string (s);
4093 free (s);
4094 }
4095 }
4096 else {
4097 ret_v = caml_copy_string ("0");
4098 }
4099 CAMLreturn (ret_v);
4100 }
4101
4102 CAMLprim value ml_freepbo (value s_v)
4103 {
4104 CAMLparam1 (s_v);
4105 char *s = String_val (s_v);
4106 struct tile *tile = parse_pointer ("ml_freepbo", s);
4107
4108 if (tile->pbo) {
4109 state.glDeleteBuffersARB (1, &tile->pbo->id);
4110 tile->pbo->id = -1;
4111 tile->pbo->ptr = NULL;
4112 tile->pbo->size = -1;
4113 }
4114 CAMLreturn (Val_unit);
4115 }
4116
4117 CAMLprim value ml_unmappbo (value s_v)
4118 {
4119 CAMLparam1 (s_v);
4120 char *s = String_val (s_v);
4121 struct tile *tile = parse_pointer ("ml_unmappbo", s);
4122
4123 if (tile->pbo) {
4124 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
4125 if (state.glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) == GL_FALSE) {
4126 errx (1, "glUnmapBufferARB failed: %#x\n", glGetError ());
4127 }
4128 tile->pbo->ptr = NULL;
4129 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4130 }
4131 CAMLreturn (Val_unit);
4132 }
4133
4134 static void setuppbo (void)
4135 {
4136 #define GGPA(n) (*(void (**) ()) &state.n = glXGetProcAddress ((GLubyte *) #n))
4137 state.pbo_usable = GGPA (glBindBufferARB)
4138 && GGPA (glUnmapBufferARB)
4139 && GGPA (glMapBufferARB)
4140 && GGPA (glBufferDataARB)
4141 && GGPA (glGenBuffersARB)
4142 && GGPA (glDeleteBuffersARB);
4143 #undef GGPA
4144 }
4145
4146 CAMLprim value ml_pbo_usable (value unit_v)
4147 {
4148 CAMLparam1 (unit_v);
4149 CAMLreturn (Val_bool (state.pbo_usable));
4150 }
4151
4152 CAMLprim value ml_unproject (value ptr_v, value x_v, value y_v)
4153 {
4154 CAMLparam3 (ptr_v, x_v, y_v);
4155 CAMLlocal2 (ret_v, tup_v);
4156 struct page *page;
4157 char *s = String_val (ptr_v);
4158 int x = Int_val (x_v), y = Int_val (y_v);
4159 struct pagedim *pdim;
4160 fz_point p;
4161 fz_matrix ctm;
4162
4163 page = parse_pointer ("ml_unproject", s);
4164 pdim = &state.pagedims[page->pdimno];
4165
4166 ret_v = Val_int (0);
4167 if (trylock ("ml_unproject")) {
4168 goto done;
4169 }
4170
4171 switch (page->type) {
4172 case DPDF:
4173 trimctm (page->u.pdfpage, page->pdimno);
4174 break;
4175
4176 default:
4177 break;
4178 }
4179 p.x = x + pdim->bounds.x0;
4180 p.y = y + pdim->bounds.y0;
4181
4182 fz_concat (&ctm, &pdim->tctm, &pdim->ctm);
4183 fz_invert_matrix (&ctm, &ctm);
4184 fz_transform_point (&p, &ctm);
4185
4186 tup_v = caml_alloc_tuple (2);
4187 ret_v = caml_alloc_small (1, 1);
4188 Field (tup_v, 0) = Val_int (p.x);
4189 Field (tup_v, 1) = Val_int (p.y);
4190 Field (ret_v, 0) = tup_v;
4191
4192 unlock ("ml_unproject");
4193 done:
4194 CAMLreturn (ret_v);
4195 }
4196
4197 static void makestippletex (void)
4198 {
4199 const char pixels[] = "\xff\xff\0\0";
4200 glGenTextures (1, &state.stid);
4201 glBindTexture (GL_TEXTURE_1D, state.stid);
4202 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
4203 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
4204 glTexImage1D (
4205 GL_TEXTURE_1D,
4206 0,
4207 GL_ALPHA,
4208 4,
4209 0,
4210 GL_ALPHA,
4211 GL_UNSIGNED_BYTE,
4212 pixels
4213 );
4214 }
4215
4216 CAMLprim value ml_fz_version (value unit_v)
4217 {
4218 return caml_copy_string (FZ_VERSION);
4219 }
4220
4221 #ifdef USE_FONTCONFIG
4222 static struct {
4223 int inited;
4224 FcConfig *config;
4225 } fc;
4226
4227 static fz_font *fc_load_system_font_func (fz_context *ctx,
4228 const char *name,
4229 int bold,
4230 int italic,
4231 int needs_exact_metrics)
4232 {
4233 char *buf;
4234 size_t i, size;
4235 fz_font *font;
4236 FcChar8 *path;
4237 FcResult result;
4238 FcPattern *pat, *pat1;
4239
4240 lprintf ("looking up %s bold:%d italic:%d needs_exact_metrics:%d\n",
4241 name, bold, italic, needs_exact_metrics);
4242 if (!fc.inited) {
4243 fc.inited = 1;
4244 fc.config = FcInitLoadConfigAndFonts ();
4245 if (!fc.config) {
4246 lprintf ("FcInitLoadConfigAndFonts failed\n");
4247 return NULL;
4248 }
4249 }
4250 if (!fc.config) return NULL;
4251
4252 size = strlen (name);
4253 if (bold) size += sizeof (":bold") - 1;
4254 if (italic) size += sizeof (":italic") - 1;
4255 size += 1;
4256
4257 buf = malloc (size);
4258 if (!buf) {
4259 err (1, "malloc %zu failed", size);
4260 }
4261
4262 strcpy (buf, name);
4263 if (bold && italic) {
4264 strcat (buf, ":bold:italic");
4265 }
4266 else {
4267 if (bold) strcat (buf, ":bold");
4268 if (italic) strcat (buf, ":italic");
4269 }
4270 for (i = 0; i < size; ++i) {
4271 if (buf[i] == ',' || buf[i] == '-') buf[i] = ':';
4272 }
4273
4274 lprintf ("fcbuf=%s\n", buf);
4275 pat = FcNameParse ((FcChar8 *) buf);
4276 if (!pat) {
4277 printd ("emsg FcNameParse failed\n");
4278 free (buf);
4279 return NULL;
4280 }
4281
4282 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4283 printd ("emsg FcConfigSubstitute failed\n");
4284 free (buf);
4285 return NULL;
4286 }
4287 FcDefaultSubstitute (pat);
4288
4289 pat1 = FcFontMatch (fc.config, pat, &result);
4290 if (!pat1) {
4291 printd ("emsg FcFontMatch failed\n");
4292 FcPatternDestroy (pat);
4293 free (buf);
4294 return NULL;
4295 }
4296
4297 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4298 printd ("emsg FcPatternGetString failed\n");
4299 FcPatternDestroy (pat);
4300 FcPatternDestroy (pat1);
4301 free (buf);
4302 return NULL;
4303 }
4304
4305 #if 0
4306 printd ("emsg name=%s path=%s\n", name, path);
4307 #endif
4308 font = fz_new_font_from_file (ctx, name, (char *) path, 0, 0);
4309 FcPatternDestroy (pat);
4310 FcPatternDestroy (pat1);
4311 free (buf);
4312 return font;
4313 }
4314 #endif
4315
4316 CAMLprim value ml_init (value csock_v, value params_v)
4317 {
4318 CAMLparam2 (csock_v, params_v);
4319 CAMLlocal2 (trim_v, fuzz_v);
4320 int ret;
4321 int texcount;
4322 char *fontpath;
4323 int colorspace;
4324 int mustoresize;
4325 int haspboext;
4326 struct sigaction sa;
4327
4328 state.csock = Int_val (csock_v);
4329 state.rotate = Int_val (Field (params_v, 0));
4330 state.fitmodel = Int_val (Field (params_v, 1));
4331 trim_v = Field (params_v, 2);
4332 texcount = Int_val (Field (params_v, 3));
4333 state.sliceheight = Int_val (Field (params_v, 4));
4334 mustoresize = Int_val (Field (params_v, 5));
4335 colorspace = Int_val (Field (params_v, 6));
4336 fontpath = String_val (Field (params_v, 7));
4337
4338 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4339 if (!state.trimcachepath) {
4340 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4341 strerror (errno));
4342 }
4343 haspboext = Bool_val (Field (params_v, 9));
4344
4345 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4346
4347 #ifdef USE_FONTCONFIG
4348 fz_install_load_system_font_funcs (
4349 state.ctx, fc_load_system_font_func, NULL
4350 );
4351 #endif
4352
4353 state.trimmargins = Bool_val (Field (trim_v, 0));
4354 fuzz_v = Field (trim_v, 1);
4355 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4356 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4357 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4358 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4359
4360 set_tex_params (colorspace);
4361
4362 if (*fontpath) {
4363 #ifndef USE_FONTCONFIG
4364 state.face = load_font (fontpath);
4365 #else
4366 FcChar8 *path;
4367 FcResult result;
4368 char *buf = fontpath;
4369 FcPattern *pat, *pat1;
4370
4371 fc.inited = 1;
4372 fc.config = FcInitLoadConfigAndFonts ();
4373 if (!fc.config) {
4374 errx (1, "FcInitLoadConfigAndFonts failed");
4375 }
4376
4377 pat = FcNameParse ((FcChar8 *) buf);
4378 if (!pat) {
4379 errx (1, "FcNameParse failed");
4380 }
4381
4382 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4383 errx (1, "FcConfigSubstitute failed");
4384 }
4385 FcDefaultSubstitute (pat);
4386
4387 pat1 = FcFontMatch (fc.config, pat, &result);
4388 if (!pat1) {
4389 errx (1, "FcFontMatch failed");
4390 }
4391
4392 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4393 errx (1, "FcPatternGetString failed");
4394 }
4395
4396 state.face = load_font ((char *) path);
4397 FcPatternDestroy (pat);
4398 FcPatternDestroy (pat1);
4399 #endif
4400 }
4401 else {
4402 unsigned int len;
4403 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4404
4405 state.face = load_builtin_font (base, len);
4406 }
4407 if (!state.face) _exit (1);
4408
4409 realloctexts (texcount);
4410
4411 if (haspboext) {
4412 setuppbo ();
4413 }
4414
4415 makestippletex ();
4416
4417 #ifdef __CYGWIN__
4418 sa.sa_handler = SIG_IGN;
4419 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4420 #else
4421 sa.sa_handler = SIG_DFL;
4422 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4423 #endif
4424 if (sigemptyset (&sa.sa_mask)) {
4425 err (1, "sigemptyset");
4426 }
4427 if (sigaction (SIGCHLD, &sa, NULL)) {
4428 err (1, "sigaction");
4429 }
4430
4431 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4432 if (ret) {
4433 errx (1, "pthread_create: %s", strerror (ret));
4434 }
4435
4436 CAMLreturn (Val_unit);
4437 }
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