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fix Method overridden warnings
[llpp.git] / link.c
blob88c07732578f5bfb14249bb6686fff59e6407bf7
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
26 #include <GL/gl.h>
27
28 #include <caml/fail.h>
29 #include <caml/alloc.h>
30 #include <caml/memory.h>
31 #include <caml/unixsupport.h>
32
33 #include <mupdf/fitz.h>
34 #include <mupdf/cbz.h>
35 #include <mupdf/pdf.h>
36 #include <mupdf/xps.h>
37 #include <mupdf/img.h>
38
39 #include FT_FREETYPE_H
40
41 #ifdef USE_FONTCONFIG
42 #include <fontconfig/fontconfig.h>
43 #endif
44
45 #define PIGGYBACK
46 #define SUMATRA_LOOKUP
47
48 #ifndef __USE_GNU
49 extern char **environ;
50 #endif
51
52 #define MIN(a,b) ((a) < (b) ? (a) : (b))
53 #define MAX(a,b) ((a) > (b) ? (a) : (b))
54
55 #if defined __GNUC__
56 #define NORETURN_ATTR __attribute__ ((noreturn))
57 #define UNUSED_ATTR __attribute__ ((unused))
58 #if !defined __clang__
59 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
60 #else
61 #define OPTIMIZE_ATTR(n)
62 #endif
63 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
64 #else
65 #define NORETURN_ATTR
66 #define UNUSED_ATTR
67 #define OPTIMIZE_ATTR(n)
68 #define GCC_FMT_ATTR(a, b)
69 #endif
70
71 #define FMT_s "zu"
72
73 #define FMT_ptr "p"
74 #define FMT_ptr_cast(p) (p)
75 #define FMT_ptr_cast2(p) (p)
76
77 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
78 err (int exitcode, const char *fmt, ...)
79 {
80 va_list ap;
81 int savederrno;
82
83 savederrno = errno;
84 va_start (ap, fmt);
85 vfprintf (stderr, fmt, ap);
86 va_end (ap);
87 fprintf (stderr, ": %s\n", strerror (savederrno));
88 fflush (stderr);
89 _exit (exitcode);
90 }
91
92 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
93 errx (int exitcode, const char *fmt, ...)
94 {
95 va_list ap;
96
97 va_start (ap, fmt);
98 vfprintf (stderr, fmt, ap);
99 va_end (ap);
100 fputc ('\n', stderr);
101 fflush (stderr);
102 _exit (exitcode);
103 }
104
105 #ifndef GL_TEXTURE_RECTANGLE_ARB
106 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
107 #endif
108
109 #ifndef GL_BGRA
110 #define GL_BGRA 0x80E1
111 #endif
112
113 #ifndef GL_UNSIGNED_INT_8_8_8_8
114 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
115 #endif
116
117 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
118 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
119 #endif
120
121 #if 0
122 #define lprintf printf
123 #else
124 #define lprintf(...)
125 #endif
126
127 #define ARSERT(cond) for (;;) { \
128 if (!(cond)) { \
129 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
130 } \
131 break; \
132 }
133
134 struct slice {
135 int h;
136 int texindex;
137 };
138
139 struct tile {
140 int w, h;
141 int slicecount;
142 int sliceheight;
143 struct pbo *pbo;
144 fz_pixmap *pixmap;
145 struct slice slices[1];
146 };
147
148 struct pagedim {
149 int pageno;
150 int rotate;
151 int left;
152 int tctmready;
153 fz_irect bounds;
154 fz_rect pagebox;
155 fz_rect mediabox;
156 fz_matrix ctm, zoomctm, lctm, tctm;
157 };
158
159 struct slink {
160 fz_irect bbox;
161 fz_link *link;
162 };
163
164 enum { DPDF, DXPS, DCBZ, DIMG };
165
166 struct page {
167 int tgen;
168 int sgen;
169 int type;
170 int pageno;
171 int pdimno;
172 fz_text_page *text;
173 fz_text_sheet *sheet;
174 union {
175 void *ptr;
176 pdf_page *pdfpage;
177 xps_page *xpspage;
178 cbz_page *cbzpage;
179 image_page *imgpage;
180 } u;
181 fz_display_list *dlist;
182 int slinkcount;
183 struct slink *slinks;
184 struct mark {
185 int i;
186 fz_text_span *span;
187 } fmark, lmark;
188 void (*freepage) (void *);
189 };
190
191 struct {
192 int type;
193 int sliceheight;
194 struct pagedim *pagedims;
195 int pagecount;
196 int pagedimcount;
197 union {
198 pdf_document *pdf;
199 xps_document *xps;
200 cbz_document *cbz;
201 image_document *img;
202 } u;
203 fz_context *ctx;
204 int w, h;
205
206 int texindex;
207 int texcount;
208 GLuint *texids;
209
210 GLenum texiform;
211 GLenum texform;
212 GLenum texty;
213
214 fz_colorspace *colorspace;
215
216 struct {
217 int w, h;
218 struct slice *slice;
219 } *texowners;
220
221 int rotate;
222 enum { FitWidth, FitProportional, FitPage } fitmodel;
223 int trimmargins;
224 int needoutline;
225 int gen;
226 int aalevel;
227
228 int trimanew;
229 fz_irect trimfuzz;
230 fz_pixmap *pig;
231
232 pthread_t thread;
233 int cr, cw;
234 FT_Face face;
235
236 void (*closedoc) (void);
237 void (*freepage) (void *);
238
239 char *trimcachepath;
240 int cxack;
241
242 GLuint stid;
243
244 int pbo_usable;
245 void (*glBindBufferARB) (GLenum, GLuint);
246 GLboolean (*glUnmapBufferARB) (GLenum);
247 void *(*glMapBufferARB) (GLenum, GLenum);
248 void (*glBufferDataARB) (GLenum, GLsizei, void *, GLenum);
249 void (*glGenBuffersARB) (GLsizei, GLuint *);
250 void (*glDeleteBuffersARB) (GLsizei, GLuint *);
251
252 GLfloat texcoords[8];
253 GLfloat vertices[16];
254
255 #ifdef SUMATRA_LOOKUP
256 struct {
257 int count;
258 pdf_obj **objs;
259 pdf_document *pdf;
260 } pdflut;
261 #endif
262 } state;
263
264 struct pbo {
265 GLuint id;
266 void *ptr;
267 size_t size;
268 };
269
270 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
271 {
272 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
273 }
274
275 static void UNUSED_ATTR debug_bbox (const char *cap, fz_irect r)
276 {
277 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
278 }
279
280 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
281 {
282 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
283 m.a, m.b, m.c, m.d, m.e, m.f);
284 }
285
286 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
287
288 static void lock (const char *cap)
289 {
290 int ret = pthread_mutex_lock (&mutex);
291 if (ret) {
292 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
293 }
294 }
295
296 static void unlock (const char *cap)
297 {
298 int ret = pthread_mutex_unlock (&mutex);
299 if (ret) {
300 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
301 }
302 }
303
304 static int trylock (const char *cap)
305 {
306 int ret = pthread_mutex_trylock (&mutex);
307 if (ret && ret != EBUSY) {
308 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
309 }
310 return ret == EBUSY;
311 }
312
313 static void *parse_pointer (const char *cap, const char *s)
314 {
315 int ret;
316 void *ptr;
317
318 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
319 if (ret != 1) {
320 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
321 }
322 return ptr;
323 }
324
325 static double now (void)
326 {
327 struct timeval tv;
328
329 if (gettimeofday (&tv, NULL)) {
330 err (1, "gettimeofday");
331 }
332 return tv.tv_sec + tv.tv_usec*1e-6;
333 }
334
335 static int hasdata (void)
336 {
337 int ret, avail;
338 ret = ioctl (state.cr, FIONREAD, &avail);
339 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
340 return avail > 0;
341 }
342
343 CAMLprim value ml_hasdata (value fd_v)
344 {
345 CAMLparam1 (fd_v);
346 int ret, avail;
347
348 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
349 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
350 CAMLreturn (Val_bool (avail > 0));
351 }
352
353 static void readdata (void *p, int size)
354 {
355 ssize_t n;
356
357 again:
358 n = read (state.cr, p, size);
359 if (n < 0) {
360 if (errno == EINTR) goto again;
361 err (1, "read (req %d, ret %zd)", size, n);
362 }
363 if (n - size) {
364 if (!n) errx (1, "EOF while reading");
365 errx (1, "read (req %d, ret %zd)", size, n);
366 }
367 }
368
369 static void writedata (char *p, int size)
370 {
371 ssize_t n;
372
373 p[0] = (size >> 24) & 0xff;
374 p[1] = (size >> 16) & 0xff;
375 p[2] = (size >> 8) & 0xff;
376 p[3] = (size >> 0) & 0xff;
377
378 n = write (state.cw, p, size + 4);
379 if (n - size - 4) {
380 if (!n) errx (1, "EOF while writing data");
381 err (1, "write (req %d, ret %zd)", size + 4, n);
382 }
383 }
384
385 static int readlen (void)
386 {
387 unsigned char p[4];
388
389 readdata (p, 4);
390 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
391 }
392
393 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
394 {
395 int size = 200, len;
396 va_list ap;
397 char *buf;
398
399 buf = malloc (size);
400 for (;;) {
401 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
402
403 va_start (ap, fmt);
404 len = vsnprintf (buf + 4, size - 4, fmt, ap);
405 va_end (ap);
406
407 if (len > -1) {
408 if (len < size - 4) {
409 writedata (buf, len);
410 break;
411 }
412 else size = len + 5;
413 }
414 else {
415 err (1, "vsnprintf for `%s' failed", fmt);
416 }
417 buf = realloc (buf, size);
418 }
419 free (buf);
420 }
421
422 static void closepdf (void)
423 {
424 #ifdef SUMATRA_LOOKUP
425 if (state.pdflut.objs) {
426 int i;
427
428 for (i = 0; i < state.pdflut.count; ++i) {
429 pdf_drop_obj (state.pdflut.objs[i]);
430 }
431 free (state.pdflut.objs);
432 state.pdflut.objs = NULL;
433 }
434 #endif
435
436 if (state.u.pdf) {
437 pdf_close_document (state.u.pdf);
438 state.u.pdf = NULL;
439 }
440 }
441
442 static void closexps (void)
443 {
444 if (state.u.xps) {
445 xps_close_document (state.u.xps);
446 state.u.xps = NULL;
447 }
448 }
449
450 static void closecbz (void)
451 {
452 if (state.u.cbz) {
453 cbz_close_document (state.u.cbz);
454 state.u.cbz = NULL;
455 }
456 }
457
458 static void closeimg (void)
459 {
460 if (state.u.img) {
461 image_close_document (state.u.img);
462 state.u.img = NULL;
463 }
464 }
465
466 static void freepdfpage (void *ptr)
467 {
468 pdf_free_page (state.u.pdf, ptr);
469 }
470
471 static void freeemptyxxxpage (void *ptr)
472 {
473 (void) ptr;
474 }
475
476 static void freexpspage (void *ptr)
477 {
478 xps_free_page (state.u.xps, ptr);
479 }
480
481 static void freecbzpage (void *ptr)
482 {
483 cbz_free_page (state.u.cbz, ptr);
484 }
485
486 static void freeimgpage (void *ptr)
487 {
488 image_free_page (state.u.img, ptr);
489 }
490
491 static void openxref (char *filename, char *password)
492 {
493 int i, len;
494
495 for (i = 0; i < state.texcount; ++i) {
496 state.texowners[i].w = -1;
497 state.texowners[i].slice = NULL;
498 }
499
500 if (state.closedoc) state.closedoc ();
501
502 len = strlen (filename);
503
504 state.type = DPDF;
505 {
506 int i;
507 struct {
508 char *ext;
509 int type;
510 } tbl[] = {
511 { "pdf", DPDF },
512 { "xps", DXPS },
513 { "zip", DCBZ },
514 { "cbz", DCBZ },
515 { "jpg", DIMG },
516 { "jpeg", DIMG },
517 { "png", DIMG }
518 };
519
520 for (i = 0; i < sizeof (tbl) / sizeof (*tbl); ++i) {
521 int len2 = strlen (tbl[i].ext);
522
523 if (len2 < len && !strcasecmp (tbl[i].ext, filename + len - len2)) {
524 state.type = tbl[i].type;
525 break;
526 }
527 }
528 }
529
530 if (state.pagedims) {
531 free (state.pagedims);
532 state.pagedims = NULL;
533 }
534 state.pagedimcount = 0;
535
536 fz_set_aa_level (state.ctx, state.aalevel);
537 switch (state.type) {
538 case DPDF:
539 state.u.pdf = pdf_open_document (state.ctx, filename);
540 if (pdf_needs_password (state.u.pdf)) {
541 int okay = pdf_authenticate_password (state.u.pdf, password);
542 if (!okay) {
543 errx (1, "invalid password");
544 }
545 }
546 state.pagecount = pdf_count_pages (state.u.pdf);
547 state.closedoc = closepdf;
548 state.freepage = freepdfpage;
549 break;
550
551 case DXPS:
552 state.u.xps = xps_open_document (state.ctx, filename);
553 state.pagecount = xps_count_pages (state.u.xps);
554 state.closedoc = closexps;
555 state.freepage = freexpspage;
556 break;
557
558 case DCBZ:
559 state.u.cbz = cbz_open_document (state.ctx, filename);
560 state.pagecount = cbz_count_pages (state.u.cbz);
561 state.closedoc = closecbz;
562 state.freepage = freecbzpage;
563 break;
564
565 case DIMG:
566 state.u.img = image_open_document (state.ctx, filename);
567 state.pagecount = 1;
568 state.closedoc = closeimg;
569 state.freepage = freeimgpage;
570 break;
571 }
572 }
573
574 static void pdfinfo (void)
575 {
576 if (state.type == DPDF) {
577 pdf_obj *infoobj;
578
579 printd ("info PDF version\t%d.%d",
580 state.u.pdf->version / 10, state.u.pdf->version % 10);
581
582 infoobj = pdf_dict_gets (pdf_trailer (state.u.pdf), "Info");
583 if (infoobj) {
584 int i;
585 char *s;
586 char *items[] = { "Title", "Author", "Creator",
587 "Producer", "CreationDate" };
588
589 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
590 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
591 s = pdf_to_utf8 (state.u.pdf, obj);
592 if (*s) {
593 if (i == 0) {
594 printd ("title %s", s);
595 }
596 printd ("info %s\t%s", items[i], s);
597 }
598 fz_free (state.ctx, s);
599 }
600 }
601 printd ("infoend");
602 }
603 }
604
605 static void unlinktile (struct tile *tile)
606 {
607 int i;
608
609 for (i = 0; i < tile->slicecount; ++i) {
610 struct slice *s = &tile->slices[i];
611
612 if (s->texindex != -1) {
613 if (state.texowners[s->texindex].slice == s) {
614 state.texowners[s->texindex].slice = NULL;
615 }
616 }
617 }
618 }
619
620 static void freepage (struct page *page)
621 {
622 if (page->text) {
623 fz_free_text_page (state.ctx, page->text);
624 }
625 if (page->sheet) {
626 fz_free_text_sheet (state.ctx, page->sheet);
627 }
628 if (page->slinks) {
629 free (page->slinks);
630 }
631 fz_drop_display_list (state.ctx, page->dlist);
632 page->freepage (page->u.ptr);
633 free (page);
634 }
635
636 static void freetile (struct tile *tile)
637 {
638 unlinktile (tile);
639 if (!tile->pbo) {
640 #ifndef PIGGYBACK
641 fz_drop_pixmap (state.ctx, tile->pixmap);
642 #else
643 if (state.pig) {
644 fz_drop_pixmap (state.ctx, state.pig);
645 }
646 state.pig = tile->pixmap;
647 #endif
648 }
649 else {
650 free (tile->pbo);
651 fz_drop_pixmap (state.ctx, tile->pixmap);
652 }
653 free (tile);
654 }
655
656 #ifdef __ALTIVEC__
657 #include <stdint.h>
658 #include <altivec.h>
659
660 static int cacheline32bytes;
661
662 static void __attribute__ ((constructor)) clcheck (void)
663 {
664 char **envp = environ;
665 unsigned long *auxv;
666
667 while (*envp++);
668
669 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
670 if (*auxv == 19) {
671 cacheline32bytes = auxv[1] == 32;
672 return;
673 }
674 }
675 }
676
677 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
678 {
679 size_t size = pixmap->w * pixmap->h * pixmap->n;
680 if (cacheline32bytes && size > 32) {
681 intptr_t a1, a2, diff;
682 size_t sizea, i;
683 vector unsigned char v = vec_splat_u8 (-1);
684 vector unsigned char *p;
685
686 a1 = a2 = (intptr_t) pixmap->samples;
687 a2 = (a1 + 31) & ~31;
688 diff = a2 - a1;
689 sizea = size - diff;
690 p = (void *) a2;
691
692 while (a1 != a2) *(char *) a1++ = 0xff;
693 for (i = 0; i < (sizea & ~31); i += 32) {
694 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
695 vec_st (v, i, p);
696 vec_st (v, i + 16, p);
697 }
698 while (i < sizea) *((char *) a1 + i++) = 0xff;
699 }
700 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
701 }
702 #else
703 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
704 #endif
705
706 static void trimctm (pdf_page *page, int pindex)
707 {
708 fz_matrix ctm;
709 struct pagedim *pdim = &state.pagedims[pindex];
710
711 if (!pdim->tctmready) {
712 if (state.trimmargins) {
713 fz_rect realbox;
714 fz_matrix rm, sm, tm, im, ctm1;
715
716 fz_rotate (&rm, -pdim->rotate);
717 fz_scale (&sm, 1, -1);
718 fz_concat (&ctm, &rm, &sm);
719 realbox = pdim->mediabox;
720 fz_transform_rect (&realbox, &ctm);
721 fz_translate (&tm, -realbox.x0, -realbox.y0);
722 fz_concat (&ctm1, &ctm, &tm);
723 fz_invert_matrix (&im, &page->ctm);
724 fz_concat (&ctm, &im, &ctm1);
725 }
726 else {
727 ctm = fz_identity;
728 }
729 pdim->tctm = ctm;
730 pdim->tctmready = 1;
731 }
732 }
733
734 static fz_matrix pagectm (struct page *page)
735 {
736 fz_matrix ctm, tm;
737
738 if (page->type == DPDF) {
739 trimctm (page->u.pdfpage, page->pdimno);
740 fz_concat (&ctm,
741 &state.pagedims[page->pdimno].tctm,
742 &state.pagedims[page->pdimno].ctm);
743 }
744 else {
745 struct pagedim *pdim = &state.pagedims[page->pdimno];
746
747 fz_translate (&tm, -pdim->mediabox.x0, -pdim->mediabox.y0);
748 fz_concat (&ctm, &tm, &state.pagedims[page->pdimno].ctm);
749 }
750 return ctm;
751 }
752
753 static void *loadpage (int pageno, int pindex)
754 {
755 fz_device *dev;
756 struct page *page;
757
758 page = calloc (sizeof (struct page), 1);
759 if (!page) {
760 err (1, "calloc page %d", pageno);
761 }
762
763 page->dlist = fz_new_display_list (state.ctx);
764 dev = fz_new_list_device (state.ctx, page->dlist);
765 fz_try (state.ctx) {
766 switch (state.type) {
767 case DPDF:
768 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
769 pdf_run_page (state.u.pdf, page->u.pdfpage, dev,
770 &fz_identity, NULL);
771 page->freepage = freepdfpage;
772 break;
773
774 case DXPS:
775 page->u.xpspage = xps_load_page (state.u.xps, pageno);
776 xps_run_page (state.u.xps, page->u.xpspage, dev,
777 &fz_identity, NULL);
778 page->freepage = freexpspage;
779 break;
780
781 case DCBZ:
782 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
783 cbz_run_page (state.u.cbz, page->u.cbzpage, dev,
784 &fz_identity, NULL);
785 page->freepage = freecbzpage;
786 break;
787
788 case DIMG:
789 page->u.imgpage = image_load_page (state.u.img, pageno);
790 image_run_page (state.u.img, page->u.imgpage, dev,
791 &fz_identity, NULL);
792 page->freepage = freeimgpage;
793 break;
794 }
795 }
796 fz_catch (state.ctx) {
797 page->u.ptr = NULL;
798 page->freepage = freeemptyxxxpage;
799 }
800 fz_free_device (dev);
801
802 page->pdimno = pindex;
803 page->pageno = pageno;
804 page->sgen = state.gen;
805 page->tgen = state.gen;
806 page->type = state.type;
807
808 return page;
809 }
810
811 static struct tile *alloctile (int h)
812 {
813 int i;
814 int slicecount;
815 size_t tilesize;
816 struct tile *tile;
817
818 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
819 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
820 tile = calloc (tilesize, 1);
821 if (!tile) {
822 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
823 }
824 for (i = 0; i < slicecount; ++i) {
825 int sh = MIN (h, state.sliceheight);
826 tile->slices[i].h = sh;
827 tile->slices[i].texindex = -1;
828 h -= sh;
829 }
830 tile->slicecount = slicecount;
831 tile->sliceheight = state.sliceheight;
832 return tile;
833 }
834
835 #ifdef OBSCURED_OPT
836 struct obs {
837 int cured;
838 fz_irect b;
839 };
840
841 static void obs_fill_image (fz_device *dev, fz_image *image,
842 const fz_matrix *ctm, float alpha)
843 {
844 struct obs *obs = dev->user;
845
846 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
847 fz_irect b;
848 fz_rect rect = fz_unit_rect;
849
850 fz_transform_rect (&rect, ctm);
851 fz_round_rect (&b, &rect);
852 fz_intersect_irect (&b, &obs->b);
853 obs->cured = b.x0 == obs->b.x0
854 && b.x1 == obs->b.x1
855 && b.y0 == obs->b.y0
856 && b.y1 == obs->b.y1;
857 }
858 }
859
860 static int obscured (struct page *page, fz_irect bbox)
861 {
862 fz_rect rect;
863 fz_matrix ctm;
864 fz_device dev;
865 struct obs obs;
866
867 memset (&dev, 0, sizeof (dev));
868 memset (&obs, 0, sizeof (obs));
869 dev.hints = 0;
870 dev.flags = 0;
871 dev.user = &obs;
872 dev.ctx = state.ctx;
873 dev.fill_image = obs_fill_image;
874 obs.b = bbox;
875 fz_rect_from_irect (&rect, &bbox);
876 ctm = pagectm (page);
877 fz_run_display_list (page->dlist, &dev, &ctm, &rect, NULL);
878 return obs.cured;
879 }
880 #define OBSCURED obscured
881 #else
882 #define OBSCURED(a, b) 0
883 #endif
884
885 static struct tile *rendertile (struct page *page, int x, int y, int w, int h,
886 struct pbo *pbo)
887 {
888 fz_rect rect;
889 fz_irect bbox;
890 fz_matrix ctm;
891 fz_device *dev;
892 struct tile *tile;
893 struct pagedim *pdim;
894
895 tile = alloctile (h);
896 pdim = &state.pagedims[page->pdimno];
897
898 bbox = pdim->bounds;
899 bbox.x0 += x;
900 bbox.y0 += y;
901 bbox.x1 = bbox.x0 + w;
902 bbox.y1 = bbox.y0 + h;
903
904 if (state.pig) {
905 if (state.pig->w == w
906 && state.pig->h == h
907 && state.pig->colorspace == state.colorspace) {
908 tile->pixmap = state.pig;
909 tile->pixmap->x = bbox.x0;
910 tile->pixmap->y = bbox.y0;
911 }
912 else {
913 fz_drop_pixmap (state.ctx, state.pig);
914 }
915 state.pig = NULL;
916 }
917 if (!tile->pixmap) {
918 if (pbo) {
919 tile->pixmap =
920 fz_new_pixmap_with_bbox_and_data (state.ctx, state.colorspace,
921 &bbox, pbo->ptr);
922 tile->pbo = pbo;
923 }
924 else {
925 tile->pixmap =
926 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, &bbox);
927 }
928 }
929
930 tile->w = w;
931 tile->h = h;
932 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
933 clearpixmap (tile->pixmap);
934 }
935 dev = fz_new_draw_device (state.ctx, tile->pixmap);
936 ctm = pagectm (page);
937 fz_rect_from_irect (&rect, &bbox);
938 fz_run_display_list (page->dlist, dev, &ctm, &rect, NULL);
939 fz_free_device (dev);
940
941 return tile;
942 }
943
944 #ifdef SUMATRA_LOOKUP
945 /* Following two functions are taken (almost) verbatim from SumatraPDF
946 PdfEngine.cpp
947 */
948 static void
949 pdf_load_page_objs_rec(pdf_document *doc, pdf_obj *node, int *page_no, pdf_obj **page_objs)
950 {
951 fz_context *ctx = doc->ctx;
952
953 if (pdf_mark_obj(node))
954 fz_throw(ctx, FZ_ERROR_GENERIC, "cycle in page tree");
955
956 fz_try(ctx) {
957 pdf_obj *kids = pdf_dict_gets(node, "Kids");
958 int len = pdf_array_len(kids), i;
959 for (i = 0; i < len; i++) {
960 pdf_obj *kid = pdf_array_get(kids, i);
961 char *type = pdf_to_name(pdf_dict_gets(kid, "Type"));
962 if (!strcmp(type, "Page")) {
963 if (*page_no > pdf_count_pages(doc))
964 fz_throw(ctx, FZ_ERROR_GENERIC, "found more /Page objects than anticipated");
965 page_objs[*page_no - 1] = pdf_keep_obj(kid);
966 (*page_no)++;
967 }
968 else if (!strcmp(type, "Pages")) {
969 int count = pdf_to_int(pdf_dict_gets(kid, "Count"));
970 if (count > 0)
971 pdf_load_page_objs_rec(doc, kid, page_no, page_objs);
972 }
973 else {
974 fz_warn(ctx, "non-page object in page tree (%s)", type);
975 }
976 }
977 }
978 fz_always(ctx) {
979 pdf_unmark_obj(node);
980 }
981 fz_catch(ctx) {
982 fz_rethrow(ctx);
983 }
984 }
985
986 static void
987 pdf_load_page_objs(pdf_document *doc, pdf_obj **page_objs)
988 {
989 pdf_obj *pages = pdf_dict_getp(pdf_trailer(doc), "Root/Pages");
990 int page_no = 1;
991 pdf_load_page_objs_rec(doc, pages, &page_no, page_objs);
992 }
993 #endif
994
995 static void initpdims (void)
996 {
997 double start, end;
998 FILE *trimf = NULL;
999 fz_rect rootmediabox;
1000 int pageno, trim, show;
1001 int trimw = 0, cxcount;
1002
1003 start = now ();
1004
1005 if (state.trimmargins && state.trimcachepath) {
1006 trimf = fopen (state.trimcachepath, "rb");
1007 if (!trimf) {
1008 trimf = fopen (state.trimcachepath, "wb");
1009 trimw = 1;
1010 }
1011 }
1012
1013 if (state.trimmargins || state.type == DPDF || !state.cxack)
1014 cxcount = state.pagecount;
1015 else
1016 cxcount = MIN (state.pagecount, 1);
1017
1018 if (state.type == DPDF) {
1019 pdf_obj *obj;
1020 obj = pdf_dict_getp (pdf_trailer (state.u.pdf),
1021 "Root/Pages/MediaBox");
1022 pdf_to_rect (state.ctx, obj, &rootmediabox);
1023 }
1024
1025 #ifdef SUMATRA_LOOKUP
1026 if (state.type == DPDF
1027 && (!state.pdflut.objs || state.pdflut.pdf != state.u.pdf)) {
1028 state.pdflut.objs = malloc (sizeof (*state.pdflut.objs) * cxcount);
1029 if (!state.pdflut.objs) {
1030 err (1, "malloc pageobjs %zu %d %zu failed",
1031 sizeof (*state.pdflut.objs), cxcount,
1032 sizeof (*state.pdflut.objs) * cxcount);
1033 }
1034 state.pdflut.count = cxcount;
1035 pdf_load_page_objs (state.u.pdf, state.pdflut.objs);
1036 state.pdflut.pdf = state.u.pdf;
1037 }
1038 #endif
1039
1040 for (pageno = 0; pageno < cxcount; ++pageno) {
1041 int rotate = 0;
1042 struct pagedim *p;
1043 fz_rect mediabox;
1044
1045 switch (state.type) {
1046 case DPDF: {
1047 pdf_document *pdf = state.u.pdf;
1048 pdf_obj *pageref, *pageobj;
1049
1050 #ifdef SUMATRA_LOOKUP
1051 pageref = state.pdflut.objs[pageno];
1052 #else
1053 pageref = pdf_lookup_page_obj (pdf, pageno);
1054 #endif
1055 pageobj = pdf_resolve_indirect (pageref);
1056
1057 if (state.trimmargins) {
1058 pdf_obj *obj;
1059 pdf_page *page;
1060
1061 fz_try (state.ctx) {
1062 page = pdf_load_page (pdf, pageno);
1063 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
1064 trim = state.trimanew || !obj;
1065 if (trim) {
1066 fz_rect rect;
1067 fz_matrix ctm;
1068 fz_device *dev;
1069
1070 dev = fz_new_bbox_device (state.ctx, &rect);
1071 dev->hints |= FZ_IGNORE_SHADE;
1072 fz_invert_matrix (&ctm, &page->ctm);
1073 pdf_run_page (pdf, page, dev, &fz_identity, NULL);
1074 fz_free_device (dev);
1075
1076 rect.x0 += state.trimfuzz.x0;
1077 rect.x1 += state.trimfuzz.x1;
1078 rect.y0 += state.trimfuzz.y0;
1079 rect.y1 += state.trimfuzz.y1;
1080 fz_transform_rect (&rect, &ctm);
1081 fz_intersect_rect (&rect, &page->mediabox);
1082
1083 if (fz_is_empty_rect (&rect)) {
1084 mediabox = page->mediabox;
1085 }
1086 else {
1087 mediabox = rect;
1088 }
1089
1090 obj = pdf_new_array (pdf, 4);
1091 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x0));
1092 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y0));
1093 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x1));
1094 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y1));
1095 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
1096 }
1097 else {
1098 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
1099 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
1100 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
1101 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
1102 }
1103
1104 rotate = page->rotate;
1105 pdf_free_page (pdf, page);
1106
1107 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
1108 if (show) {
1109 printd ("progress %f Trimming %d",
1110 (double) (pageno + 1) / state.pagecount,
1111 pageno + 1);
1112 }
1113 }
1114 fz_catch (state.ctx) {
1115 fprintf (stderr, "failed to load page %d\n", pageno+1);
1116 }
1117 }
1118 else {
1119 int empty = 0;
1120 fz_rect cropbox;
1121
1122 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "MediaBox"),
1123 &mediabox);
1124 if (fz_is_empty_rect (&mediabox)) {
1125 mediabox.x0 = 0;
1126 mediabox.y0 = 0;
1127 mediabox.x1 = 612;
1128 mediabox.y1 = 792;
1129 empty = 1;
1130 }
1131
1132 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "CropBox"),
1133 &cropbox);
1134 if (!fz_is_empty_rect (&cropbox)) {
1135 if (empty) {
1136 mediabox = cropbox;
1137 }
1138 else {
1139 fz_intersect_rect (&mediabox, &cropbox);
1140 }
1141 }
1142 else {
1143 if (empty) {
1144 if (fz_is_empty_rect (&rootmediabox)) {
1145 fprintf (stderr,
1146 "cannot find page size for page %d\n",
1147 pageno+1);
1148 }
1149 else {
1150 mediabox = rootmediabox;
1151 }
1152 }
1153 }
1154 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
1155 }
1156 break;
1157 }
1158
1159 case DXPS:
1160 {
1161 xps_page *page;
1162
1163 fz_try (state.ctx) {
1164 page = xps_load_page (state.u.xps, pageno);
1165 xps_bound_page (state.u.xps, page, &mediabox);
1166 rotate = 0;
1167 if (state.trimmargins) {
1168 fz_rect rect;
1169 fz_device *dev;
1170
1171 dev = fz_new_bbox_device (state.ctx, &rect);
1172 dev->hints |= FZ_IGNORE_SHADE;
1173 xps_run_page (state.u.xps, page, dev,
1174 &fz_identity, NULL);
1175 fz_free_device (dev);
1176
1177 rect.x0 += state.trimfuzz.x0;
1178 rect.x1 += state.trimfuzz.x1;
1179 rect.y0 += state.trimfuzz.y0;
1180 rect.y1 += state.trimfuzz.y1;
1181 fz_intersect_rect (&rect, &mediabox);
1182
1183 if (!fz_is_empty_rect (&rect)) {
1184 mediabox = rect;
1185 }
1186 }
1187 xps_free_page (state.u.xps, page);
1188 if (!state.cxack) {
1189 printd ("progress %f loading %d",
1190 (double) (pageno + 1) / state.pagecount,
1191 pageno + 1);
1192 }
1193 }
1194 fz_catch (state.ctx) {
1195 }
1196 }
1197 break;
1198
1199 case DCBZ:
1200 {
1201 rotate = 0;
1202 mediabox.x0 = 0;
1203 mediabox.y0 = 0;
1204 mediabox.x1 = 900;
1205 mediabox.y1 = 900;
1206 if (state.trimmargins && trimw) {
1207 cbz_page *page;
1208
1209 fz_try (state.ctx) {
1210 page = cbz_load_page (state.u.cbz, pageno);
1211 cbz_bound_page (state.u.cbz, page, &mediabox);
1212 cbz_free_page (state.u.cbz, page);
1213 printd ("progress %f Trimming %d",
1214 (double) (pageno + 1) / state.pagecount,
1215 pageno + 1);
1216 }
1217 fz_catch (state.ctx) {
1218 fprintf (stderr, "failed to load page %d\n", pageno+1);
1219 }
1220 if (trimf) {
1221 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
1222 if (n - 1) {
1223 err (1, "fwrite trim mediabox");
1224 }
1225 }
1226 }
1227 else {
1228 if (trimf) {
1229 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
1230 if (n - 1) {
1231 err (1, "fread trim mediabox");
1232 }
1233 }
1234 else {
1235 if (state.cxack) {
1236 cbz_page *page;
1237 fz_try (state.ctx) {
1238 page = cbz_load_page (state.u.cbz, pageno);
1239 cbz_bound_page (state.u.cbz, page, &mediabox);
1240 cbz_free_page (state.u.cbz, page);
1241 }
1242 fz_catch (state.ctx) {
1243 fprintf (stderr, "failed to load cbz page\n");
1244 }
1245 }
1246 }
1247 }
1248 }
1249 break;
1250
1251 case DIMG:
1252 {
1253 image_page *page;
1254
1255 rotate = 0;
1256 mediabox.x0 = 0;
1257 mediabox.y0 = 0;
1258 mediabox.x1 = 900;
1259 mediabox.y1 = 900;
1260
1261 fz_try (state.ctx) {
1262 page = image_load_page (state.u.img, pageno);
1263 image_bound_page (state.u.img, page, &mediabox);
1264 image_free_page (state.u.img, page);
1265 }
1266 fz_catch (state.ctx) {
1267 fprintf (stderr, "failed to load page %d\n", pageno+1);
1268 }
1269 }
1270 break;
1271
1272 default:
1273 ARSERT (0 && state.type);
1274 }
1275
1276 if (state.pagedimcount == 0
1277 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1278 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1279 size_t size;
1280
1281 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1282 state.pagedims = realloc (state.pagedims, size);
1283 if (!state.pagedims) {
1284 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1285 size, state.pagedimcount + 1);
1286 }
1287
1288 p = &state.pagedims[state.pagedimcount++];
1289 p->rotate = rotate;
1290 p->mediabox = mediabox;
1291 p->pageno = pageno;
1292 }
1293 }
1294 end = now ();
1295 if (state.trimmargins) {
1296 printd ("progress 1 Trimmed %d pages in %f seconds",
1297 state.pagecount, end - start);
1298 }
1299 else {
1300 printd ("vmsg Processed %d pages in %f seconds",
1301 state.pagecount, end - start);
1302 }
1303 state.trimanew = 0;
1304 if (trimf) {
1305 if (fclose (trimf)) {
1306 err (1, "fclose");
1307 }
1308 }
1309 }
1310
1311 static void layout (void)
1312 {
1313 int pindex;
1314 fz_rect box;
1315 fz_matrix ctm, rm;
1316 struct pagedim *p = p;
1317 double zw, w, maxw = 0.0, zoom = zoom;
1318
1319 if (state.pagedimcount == 0) return;
1320
1321 switch (state.fitmodel) {
1322 case FitProportional:
1323 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1324 double x0, x1;
1325
1326 p = &state.pagedims[pindex];
1327 fz_rotate (&rm, p->rotate + state.rotate);
1328 box = p->mediabox;
1329 fz_transform_rect (&box, &rm);
1330
1331 x0 = MIN (box.x0, box.x1);
1332 x1 = MAX (box.x0, box.x1);
1333
1334 w = x1 - x0;
1335 maxw = MAX (w, maxw);
1336 zoom = state.w / maxw;
1337 }
1338 break;
1339
1340 case FitPage:
1341 maxw = state.w;
1342 break;
1343
1344 case FitWidth:
1345 break;
1346
1347 default:
1348 ARSERT (0 && state.fitmodel);
1349 }
1350
1351 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1352 fz_rect rect;
1353 fz_matrix tm, sm;
1354
1355 p = &state.pagedims[pindex];
1356 fz_rotate (&ctm, state.rotate);
1357 fz_rotate (&rm, p->rotate + state.rotate);
1358 box = p->mediabox;
1359 fz_transform_rect (&box, &rm);
1360 w = box.x1 - box.x0;
1361 switch (state.fitmodel) {
1362 case FitProportional:
1363 p->left = ((maxw - w) * zoom) / 2.0;
1364 break;
1365 case FitPage:
1366 {
1367 double zh, h;
1368 zw = maxw / w;
1369 h = box.y1 - box.y0;
1370 zh = state.h / h;
1371 zoom = MIN (zw, zh);
1372 p->left = (maxw - (w * zoom)) / 2.0;
1373 }
1374 break;
1375 case FitWidth:
1376 p->left = 0;
1377 zoom = state.w / w;
1378 break;
1379 }
1380
1381 fz_scale (&p->zoomctm, zoom, zoom);
1382 fz_concat (&ctm, &p->zoomctm, &ctm);
1383
1384 fz_rotate (&rm, p->rotate);
1385 p->pagebox = p->mediabox;
1386 fz_transform_rect (&p->pagebox, &rm);
1387 p->pagebox.x1 -= p->pagebox.x0;
1388 p->pagebox.y1 -= p->pagebox.y0;
1389 p->pagebox.x0 = 0;
1390 p->pagebox.y0 = 0;
1391 rect = p->pagebox;
1392 fz_transform_rect (&rect, &ctm);
1393 fz_round_rect (&p->bounds, &rect);
1394 p->ctm = ctm;
1395
1396 fz_translate (&tm, 0, -p->mediabox.y1);
1397 fz_scale (&sm, zoom, -zoom);
1398 fz_concat (&ctm, &tm, &sm);
1399 fz_concat (&p->lctm, &ctm, &rm);
1400
1401 p->tctmready = 0;
1402 }
1403
1404 do {
1405 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1406 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1407 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1408 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1409 int w = x1 - x0;
1410 int h = y1 - y0;
1411
1412 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1413 } while (p-- != state.pagedims);
1414 }
1415
1416 static
1417 struct anchor { int n; int x; int y; int w; int h; }
1418 desttoanchor (fz_link_dest *dest)
1419 {
1420 int i;
1421 struct anchor a;
1422 struct pagedim *pdim = state.pagedims;
1423
1424 a.n = -1;
1425 a.x = 0;
1426 a.y = 0;
1427 for (i = 0; i < state.pagedimcount; ++i) {
1428 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1429 break;
1430 pdim = &state.pagedims[i];
1431 }
1432 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1433 fz_point p;
1434 if (dest->ld.gotor.flags & fz_link_flag_l_valid)
1435 p.x = dest->ld.gotor.lt.x;
1436 else
1437 p.x = 0.0;
1438 p.y = dest->ld.gotor.lt.y;
1439 fz_transform_point (&p, &pdim->lctm);
1440 a.y = p.y;
1441 a.x = p.x;
1442 }
1443 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1444 double x0, x1, y0, y1;
1445
1446 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1447 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1448 a.w = x1 - x0;
1449 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1450 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1451 a.h = y1 - y0;
1452 a.n = dest->ld.gotor.page;
1453 }
1454 return a;
1455 }
1456
1457 static void recurse_outline (fz_outline *outline, int level)
1458 {
1459 while (outline) {
1460 switch (outline->dest.kind) {
1461 case FZ_LINK_GOTO:
1462 {
1463 struct anchor a = desttoanchor (&outline->dest);
1464
1465 if (a.n >= 0) {
1466 printd ("o %d %d %d %d %s",
1467 level, a.n, a.y, a.h, outline->title);
1468 }
1469 }
1470 break;
1471
1472 case FZ_LINK_URI:
1473 printd ("ou %d %" FMT_s " %s %s", level,
1474 strlen (outline->title), outline->title,
1475 outline->dest.ld.uri.uri);
1476 break;
1477
1478 case FZ_LINK_NONE:
1479 printd ("on %d %s", level, outline->title);
1480 break;
1481
1482 default:
1483 printd ("emsg Unhandled outline kind %d for %s\n",
1484 outline->dest.kind, outline->title);
1485 break;
1486 }
1487 if (outline->down) {
1488 recurse_outline (outline->down, level + 1);
1489 }
1490 outline = outline->next;
1491 }
1492 }
1493
1494 static void process_outline (void)
1495 {
1496 fz_outline *outline;
1497
1498 if (!state.needoutline) return;
1499
1500 state.needoutline = 0;
1501 switch (state.type) {
1502 case DPDF:
1503 outline = pdf_load_outline (state.u.pdf);
1504 break;
1505 case DXPS:
1506 outline = xps_load_outline (state.u.xps);
1507 break;
1508 default:
1509 outline = NULL;
1510 break;
1511 }
1512 if (outline) {
1513 recurse_outline (outline, 0);
1514 fz_free_outline (state.ctx, outline);
1515 }
1516 }
1517
1518 static char *strofspan (fz_text_span *span)
1519 {
1520 char *p;
1521 char utf8[10];
1522 fz_text_char *ch;
1523 size_t size = 0, cap = 80;
1524
1525 p = malloc (cap + 1);
1526 if (!p) return NULL;
1527
1528 for (ch = span->text; ch < span->text + span->len; ++ch) {
1529 int n = fz_runetochar (utf8, ch->c);
1530 if (size + n > cap) {
1531 cap *= 2;
1532 p = realloc (p, cap + 1);
1533 if (!p) return NULL;
1534 }
1535
1536 memcpy (p + size, utf8, n);
1537 size += n;
1538 }
1539 p[size] = 0;
1540 return p;
1541 }
1542
1543 static int matchspan (regex_t *re, fz_text_page *page,
1544 fz_text_span *span, fz_matrix ctm,
1545 int stop, int pageno, double start)
1546 {
1547 int ret;
1548 char *p;
1549 regmatch_t rm;
1550 int a, b, c;
1551 fz_rect sb, eb;
1552 fz_point p1, p2, p3, p4;
1553
1554 p = strofspan (span);
1555 if (!p) return -1;
1556
1557 ret = regexec (re, p, 1, &rm, 0);
1558 if (ret) {
1559 free (p);
1560 if (ret != REG_NOMATCH) {
1561 size_t size;
1562 char errbuf[80];
1563 size = regerror (ret, re, errbuf, sizeof (errbuf));
1564 printd ("msg regexec error `%.*s'",
1565 (int) size, errbuf);
1566 return -1;
1567 }
1568 return 0;
1569 }
1570 else {
1571 int l = span->len;
1572
1573 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1574 c += fz_runelen (span->text[a].c);
1575 }
1576 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1577 c += fz_runelen (span->text[b].c);
1578 }
1579
1580 if (fz_runelen (span->text[b].c) > 1) {
1581 b = MAX (0, b-1);
1582 }
1583
1584 fz_text_char_bbox (&sb, span, a);
1585 fz_text_char_bbox (&eb, span, b);
1586
1587 p1.x = sb.x0;
1588 p1.y = sb.y0;
1589 p2.x = eb.x1;
1590 p2.y = sb.y0;
1591 p3.x = eb.x1;
1592 p3.y = eb.y1;
1593 p4.x = sb.x0;
1594 p4.y = eb.y1;
1595
1596 if (!stop) {
1597 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1598 pageno, 1,
1599 p1.x, p1.y,
1600 p2.x, p2.y,
1601 p3.x, p3.y,
1602 p4.x, p4.y);
1603
1604 printd ("progress 1 found at %d `%.*s' in %f sec",
1605 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1606 now () - start);
1607 }
1608 else {
1609 printd ("match %d %d %f %f %f %f %f %f %f %f",
1610 pageno, 2,
1611 p1.x, p1.y,
1612 p2.x, p2.y,
1613 p3.x, p3.y,
1614 p4.x, p4.y);
1615 }
1616 free (p);
1617 return 1;
1618 }
1619 }
1620
1621 static int compareblocks (const void *l, const void *r)
1622 {
1623 fz_text_block const *ls = l;
1624 fz_text_block const* rs = r;
1625 return ls->bbox.y0 - rs->bbox.y0;
1626 }
1627
1628 /* wishful thinking function */
1629 static void search (regex_t *re, int pageno, int y, int forward)
1630 {
1631 int i, j;
1632 fz_matrix ctm;
1633 fz_device *tdev;
1634 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1635 fz_text_page *text;
1636 fz_text_sheet *sheet;
1637 struct pagedim *pdim, *pdimprev;
1638 int stop = 0, niters = 0;
1639 double start, end;
1640
1641 if (!(state.type == DPDF || state.type == DXPS))
1642 return;
1643
1644 start = now ();
1645 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1646 if (niters++ == 5) {
1647 niters = 0;
1648 if (hasdata ()) {
1649 printd ("progress 1 attention requested aborting search at %d",
1650 pageno);
1651 stop = 1;
1652 }
1653 else {
1654 printd ("progress %f searching in page %d",
1655 (double) (pageno + 1) / state.pagecount,
1656 pageno);
1657 }
1658 }
1659 pdimprev = NULL;
1660 for (i = 0; i < state.pagedimcount; ++i) {
1661 pdim = &state.pagedims[i];
1662 if (pdim->pageno == pageno) {
1663 goto found;
1664 }
1665 if (pdim->pageno > pageno) {
1666 pdim = pdimprev;
1667 goto found;
1668 }
1669 pdimprev = pdim;
1670 }
1671 pdim = pdimprev;
1672 found:
1673
1674 sheet = fz_new_text_sheet (state.ctx);
1675 text = fz_new_text_page (state.ctx);
1676 tdev = fz_new_text_device (state.ctx, sheet, text);
1677
1678 switch (state.type) {
1679 case DPDF:
1680 u.ptr = NULL;
1681 fz_try (state.ctx) {
1682 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1683 trimctm (u.pdfpage, pdim - state.pagedims);
1684 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1685 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1686 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1687 fz_end_page (tdev);
1688 }
1689 fz_catch (state.ctx) {
1690 fz_free_device (tdev);
1691 u.ptr = NULL;
1692 goto nextiter;
1693 }
1694 break;
1695
1696 case DXPS:
1697 u.xpspage = xps_load_page (state.u.xps, pageno);
1698 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1699 break;
1700
1701 default:
1702 ARSERT (0 && state.type);
1703 }
1704
1705 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1706 fz_free_device (tdev);
1707
1708 for (j = 0; j < text->len; ++j) {
1709 int k;
1710 fz_page_block *pb;
1711 fz_text_block *block;
1712
1713 pb = &text->blocks[forward ? j : text->len - 1 - j];
1714 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1715 block = pb->u.text;
1716
1717 for (k = 0; k < block->len; ++k) {
1718 fz_text_line *line;
1719 fz_text_span *span;
1720
1721 if (forward) {
1722 line = &block->lines[k];
1723 if (line->bbox.y0 < y + 1) continue;
1724 }
1725 else {
1726 line = &block->lines[block->len - 1 - k];
1727 if (line->bbox.y0 > y - 1) continue;
1728 }
1729
1730 for (span = line->first_span; span; span = span->next) {
1731 switch (matchspan (re, text, span, ctm,
1732 stop, pageno, start)) {
1733 case 0: break;
1734 case 1: stop = 1; break;
1735 case -1: stop = 1; goto endloop;
1736 }
1737 }
1738 }
1739 }
1740 nextiter:
1741 if (forward) {
1742 pageno += 1;
1743 y = 0;
1744 }
1745 else {
1746 pageno -= 1;
1747 y = INT_MAX;
1748 }
1749 endloop:
1750 fz_free_text_page (state.ctx, text);
1751 fz_free_text_sheet (state.ctx, sheet);
1752 if (u.ptr) {
1753 state.freepage (u.ptr);
1754 }
1755 }
1756 end = now ();
1757 if (!stop) {
1758 printd ("progress 1 no matches %f sec", end - start);
1759 }
1760 printd ("clearrects");
1761 }
1762
1763 static void set_tex_params (int colorspace)
1764 {
1765 union {
1766 unsigned char b;
1767 unsigned int s;
1768 } endianness = {1};
1769
1770 switch (colorspace) {
1771 case 0:
1772 state.texiform = GL_RGBA8;
1773 state.texform = GL_RGBA;
1774 state.texty = GL_UNSIGNED_BYTE;
1775 state.colorspace = fz_device_rgb (state.ctx);
1776 break;
1777 case 1:
1778 state.texiform = GL_RGBA8;
1779 state.texform = GL_BGRA;
1780 state.texty = endianness.s > 1
1781 ? GL_UNSIGNED_INT_8_8_8_8
1782 : GL_UNSIGNED_INT_8_8_8_8_REV;
1783 state.colorspace = fz_device_bgr (state.ctx);
1784 break;
1785 case 2:
1786 state.texiform = GL_LUMINANCE_ALPHA;
1787 state.texform = GL_LUMINANCE_ALPHA;
1788 state.texty = GL_UNSIGNED_BYTE;
1789 state.colorspace = fz_device_gray (state.ctx);
1790 break;
1791 default:
1792 errx (1, "invalid colorspce %d", colorspace);
1793 }
1794 }
1795
1796 static void realloctexts (int texcount)
1797 {
1798 size_t size;
1799
1800 if (texcount == state.texcount) return;
1801
1802 if (texcount < state.texcount) {
1803 glDeleteTextures (state.texcount - texcount,
1804 state.texids + texcount);
1805 }
1806
1807 size = texcount * sizeof (*state.texids);
1808 state.texids = realloc (state.texids, size);
1809 if (!state.texids) {
1810 err (1, "realloc texids %" FMT_s, size);
1811 }
1812
1813 size = texcount * sizeof (*state.texowners);
1814 state.texowners = realloc (state.texowners, size);
1815 if (!state.texowners) {
1816 err (1, "realloc texowners %" FMT_s, size);
1817 }
1818 if (texcount > state.texcount) {
1819 int i;
1820
1821 glGenTextures (texcount - state.texcount,
1822 state.texids + state.texcount);
1823 for (i = state.texcount; i < texcount; ++i) {
1824 state.texowners[i].w = -1;
1825 state.texowners[i].slice = NULL;
1826 }
1827 }
1828 state.texcount = texcount;
1829 state.texindex = 0;
1830 }
1831
1832 static char *mbtoutf8 (char *s)
1833 {
1834 char *p, *r;
1835 wchar_t *tmp;
1836 size_t i, ret, len;
1837
1838 len = mbstowcs (NULL, s, strlen (s));
1839 if (len == 0) {
1840 return s;
1841 }
1842 else {
1843 if (len == (size_t) -1) {
1844 return s;
1845 }
1846 }
1847
1848 tmp = malloc (len * sizeof (wchar_t));
1849 if (!tmp) {
1850 return s;
1851 }
1852
1853 ret = mbstowcs (tmp, s, len);
1854 if (ret == (size_t) -1) {
1855 free (tmp);
1856 return s;
1857 }
1858
1859 len = 0;
1860 for (i = 0; i < ret; ++i) {
1861 len += fz_runelen (tmp[i]);
1862 }
1863
1864 p = r = malloc (len + 1);
1865 if (!r) {
1866 free (tmp);
1867 return s;
1868 }
1869
1870 for (i = 0; i < ret; ++i) {
1871 p += fz_runetochar (p, tmp[i]);
1872 }
1873 *p = 0;
1874 free (tmp);
1875 return r;
1876 }
1877
1878 CAMLprim value ml_mbtoutf8 (value s_v)
1879 {
1880 CAMLparam1 (s_v);
1881 CAMLlocal1 (ret_v);
1882 char *s, *r;
1883
1884 s = String_val (s_v);
1885 r = mbtoutf8 (s);
1886 if (r == s) {
1887 ret_v = s_v;
1888 }
1889 else {
1890 ret_v = caml_copy_string (r);
1891 free (r);
1892 }
1893 CAMLreturn (ret_v);
1894 }
1895
1896 static void * mainloop (void *unused)
1897 {
1898 char *p = NULL;
1899 int len, ret, oldlen = 0;
1900
1901 for (;;) {
1902 len = readlen ();
1903 if (len == 0) {
1904 errx (1, "readlen returned 0");
1905 }
1906
1907 if (oldlen < len + 1) {
1908 p = realloc (p, len + 1);
1909 if (!p) {
1910 err (1, "realloc %d failed", len + 1);
1911 }
1912 oldlen = len + 1;
1913 }
1914 readdata (p, len);
1915 p[len] = 0;
1916
1917 if (!strncmp ("open", p, 4)) {
1918 int wthack, off, ok = 0;
1919 char *password;
1920 char *filename;
1921 char *utf8filename;
1922 size_t filenamelen;
1923
1924 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1925 if (ret != 2) {
1926 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1927 }
1928
1929 filename = p + 5 + off;
1930 filenamelen = strlen (filename);
1931 password = filename + filenamelen + 1;
1932
1933 lock ("open");
1934 fz_try (state.ctx) {
1935 openxref (filename, password);
1936 ok = 1;
1937 }
1938 fz_catch (state.ctx) {
1939 utf8filename = mbtoutf8 (filename);
1940 printd ("msg Could not open %s", utf8filename);
1941 }
1942 if (ok) {
1943 pdfinfo ();
1944 initpdims ();
1945 }
1946 unlock ("open");
1947
1948 if (ok) {
1949 if (!wthack) {
1950 utf8filename = mbtoutf8 (filename);
1951 printd ("msg Opened %s (press h/F1 to get help)",
1952 utf8filename);
1953 if (utf8filename != filename) {
1954 free (utf8filename);
1955 }
1956 }
1957 state.needoutline = 1;
1958 }
1959 }
1960 else if (!strncmp ("cs", p, 2)) {
1961 int i, colorspace;
1962
1963 ret = sscanf (p + 2, " %d", &colorspace);
1964 if (ret != 1) {
1965 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1966 }
1967 lock ("cs");
1968 set_tex_params (colorspace);
1969 for (i = 0; i < state.texcount; ++i) {
1970 state.texowners[i].w = -1;
1971 state.texowners[i].slice = NULL;
1972 }
1973 unlock ("cs");
1974 }
1975 else if (!strncmp ("freepage", p, 8)) {
1976 void *ptr;
1977
1978 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1979 if (ret != 1) {
1980 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1981 }
1982 freepage (ptr);
1983 }
1984 else if (!strncmp ("freetile", p, 8)) {
1985 void *ptr;
1986
1987 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1988 if (ret != 1) {
1989 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1990 }
1991 freetile (ptr);
1992 }
1993 else if (!strncmp ("search", p, 6)) {
1994 int icase, pageno, y, ret, len2, forward;
1995 char *pattern;
1996 regex_t re;
1997
1998 ret = sscanf (p + 6, " %d %d %d %d,%n",
1999 &icase, &pageno, &y, &forward, &len2);
2000 if (ret != 4) {
2001 errx (1, "malformed search `%s' ret=%d", p, ret);
2002 }
2003
2004 pattern = p + 6 + len2;
2005 ret = regcomp (&re, pattern,
2006 REG_EXTENDED | (icase ? REG_ICASE : 0));
2007 if (ret) {
2008 char errbuf[80];
2009 size_t size;
2010
2011 size = regerror (ret, &re, errbuf, sizeof (errbuf));
2012 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
2013 }
2014 else {
2015 search (&re, pageno, y, forward);
2016 regfree (&re);
2017 }
2018 }
2019 else if (!strncmp ("geometry", p, 8)) {
2020 int w, h, fitmodel;
2021
2022 printd ("clear");
2023 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
2024 if (ret != 3) {
2025 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
2026 }
2027
2028 lock ("geometry");
2029 state.h = h;
2030 if (w != state.w) {
2031 int i;
2032 state.w = w;
2033 for (i = 0; i < state.texcount; ++i) {
2034 state.texowners[i].slice = NULL;
2035 }
2036 }
2037 state.fitmodel = fitmodel;
2038 layout ();
2039 process_outline ();
2040
2041 state.gen++;
2042 unlock ("geometry");
2043 printd ("continue %d", state.pagecount);
2044 }
2045 else if (!strncmp ("reqlayout", p, 9)) {
2046 char *nameddest;
2047 int rotate, fitmodel, off, h;
2048
2049 printd ("clear");
2050 ret = sscanf (p + 9, " %d %d %d %n",
2051 &rotate, &fitmodel, &h, &off);
2052 if (ret != 3) {
2053 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
2054 }
2055 lock ("reqlayout");
2056 if (state.rotate != rotate || state.fitmodel != fitmodel) {
2057 state.gen += 1;
2058 }
2059 state.rotate = rotate;
2060 state.fitmodel = fitmodel;
2061 state.h = h;
2062 layout ();
2063 process_outline ();
2064
2065 nameddest = p + 9 + off;
2066 if (state.type == DPDF && nameddest && *nameddest) {
2067 struct anchor a;
2068 fz_link_dest dest;
2069 pdf_obj *needle, *obj;
2070
2071 needle = pdf_new_string (state.u.pdf, nameddest,
2072 strlen (nameddest));
2073 obj = pdf_lookup_dest (state.u.pdf, needle);
2074 if (obj) {
2075 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
2076
2077 a = desttoanchor (&dest);
2078 if (a.n >= 0) {
2079 printd ("a %d %d %d", a.n, a.x, a.y);
2080 }
2081 else {
2082 printd ("emsg failed to parse destination `%s'\n",
2083 nameddest);
2084 }
2085 }
2086 else {
2087 printd ("emsg destination `%s' not found\n",
2088 nameddest);
2089 }
2090 pdf_drop_obj (needle);
2091 }
2092
2093 state.gen++;
2094 unlock ("reqlayout");
2095 printd ("continue %d", state.pagecount);
2096 }
2097 else if (!strncmp ("page", p, 4)) {
2098 double a, b;
2099 struct page *page;
2100 int pageno, pindex, ret;
2101
2102 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
2103 if (ret != 2) {
2104 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
2105 }
2106
2107 lock ("page");
2108 a = now ();
2109 page = loadpage (pageno, pindex);
2110 b = now ();
2111 unlock ("page");
2112
2113 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
2114 }
2115 else if (!strncmp ("tile", p, 4)) {
2116 int x, y, w, h, ret;
2117 struct page *page;
2118 struct tile *tile;
2119 double a, b;
2120 void *data;
2121
2122 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d %" FMT_ptr,
2123 FMT_ptr_cast (&page), &x, &y, &w, &h, &data);
2124 if (ret != 6) {
2125 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2126 }
2127
2128 lock ("tile");
2129 a = now ();
2130 tile = rendertile (page, x, y, w, h, data);
2131 b = now ();
2132 unlock ("tile");
2133
2134 printd ("tile %d %d %" FMT_ptr " %u %f",
2135 x, y,
2136 FMT_ptr_cast2 (tile),
2137 tile->w * tile->h * tile->pixmap->n,
2138 b - a);
2139 }
2140 else if (!strncmp ("settrim", p, 7)) {
2141 fz_irect fuzz;
2142 int trimmargins;
2143
2144 ret = sscanf (p + 7, " %d %d %d %d %d",
2145 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2146 if (ret != 5) {
2147 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2148 }
2149 printd ("clear");
2150 lock ("settrim");
2151 state.trimmargins = trimmargins;
2152 state.needoutline = 1;
2153 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2154 state.trimanew = 1;
2155 state.trimfuzz = fuzz;
2156 }
2157 state.pagedimcount = 0;
2158 free (state.pagedims);
2159 state.pagedims = NULL;
2160 initpdims ();
2161 layout ();
2162 process_outline ();
2163 unlock ("settrim");
2164 printd ("continue %d", state.pagecount);
2165 }
2166 else if (!strncmp ("sliceh", p, 6)) {
2167 int h;
2168
2169 ret = sscanf (p + 6, " %d", &h);
2170 if (ret != 1) {
2171 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2172 }
2173 if (h != state.sliceheight) {
2174 int i;
2175
2176 state.sliceheight = h;
2177 for (i = 0; i < state.texcount; ++i) {
2178 state.texowners[i].w = -1;
2179 state.texowners[i].h = -1;
2180 state.texowners[i].slice = NULL;
2181 }
2182 }
2183 }
2184 else if (!strncmp ("interrupt", p, 9)) {
2185 printd ("vmsg interrupted");
2186 }
2187 else {
2188 errx (1, "unknown command %.*s", len, p);
2189 }
2190 }
2191 return 0;
2192 }
2193
2194 CAMLprim value ml_realloctexts (value texcount_v)
2195 {
2196 CAMLparam1 (texcount_v);
2197 int ok;
2198
2199 if (trylock ("ml_realloctexts")) {
2200 ok = 0;
2201 goto done;
2202 }
2203 realloctexts (Int_val (texcount_v));
2204 ok = 1;
2205 unlock ("ml_realloctexts");
2206
2207 done:
2208 CAMLreturn (Val_bool (ok));
2209 }
2210
2211 static void recti (int x0, int y0, int x1, int y1)
2212 {
2213 GLfloat *v = state.vertices;
2214
2215 glVertexPointer (2, GL_FLOAT, 0, v);
2216 v[0] = x0; v[1] = y0;
2217 v[2] = x1; v[3] = y0;
2218 v[4] = x0; v[5] = y1;
2219 v[6] = x1; v[7] = y1;
2220 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2221 }
2222
2223 static void showsel (struct page *page, int ox, int oy)
2224 {
2225 int seen = 0;
2226 fz_irect bbox;
2227 fz_rect rect;
2228 fz_text_line *line;
2229 fz_page_block *pageb;
2230 fz_text_block *block;
2231 struct mark first, last;
2232 unsigned char selcolor[] = {15,15,15,140};
2233
2234 first = page->fmark;
2235 last = page->lmark;
2236
2237 if (!first.span || !last.span) return;
2238
2239 glEnable (GL_BLEND);
2240 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2241 glColor4ubv (selcolor);
2242
2243 ox += state.pagedims[page->pdimno].bounds.x0;
2244 oy += state.pagedims[page->pdimno].bounds.y0;
2245 for (pageb = page->text->blocks;
2246 pageb < page->text->blocks + page->text->len;
2247 ++pageb) {
2248 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2249 block = pageb->u.text;
2250
2251 for (line = block->lines;
2252 line < block->lines + block->len;
2253 ++line) {
2254 fz_text_span *span;
2255 rect = fz_empty_rect;
2256
2257 for (span = line->first_span; span; span = span->next) {
2258 int i, j, k;
2259 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2260
2261 j = 0;
2262 k = span->len - 1;
2263
2264 if (span == page->fmark.span && span == page->lmark.span) {
2265 seen = 1;
2266 j = MIN (first.i, last.i);
2267 k = MAX (first.i, last.i);
2268 }
2269 else {
2270 if (span == first.span) {
2271 seen = 1;
2272 j = first.i;
2273 }
2274 else if (span == last.span) {
2275 seen = 1;
2276 k = last.i;
2277 }
2278 }
2279
2280 if (seen) {
2281 for (i = j; i <= k; ++i) {
2282 fz_rect bbox;
2283 fz_union_rect (&rect,
2284 fz_text_char_bbox (&bbox, span, i));
2285 }
2286 fz_round_rect (&bbox, &rect);
2287 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2288 bbox.x0,
2289 bbox.y0,
2290 bbox.x1,
2291 bbox.y1,
2292 oy, ox);
2293
2294 recti (bbox.x0 + ox, bbox.y0 + oy,
2295 bbox.x1 + ox, bbox.y1 + oy);
2296 if (span == last.span) {
2297 goto done;
2298 }
2299 rect = fz_empty_rect;
2300 }
2301 }
2302 }
2303 }
2304 done:
2305 glDisable (GL_BLEND);
2306 }
2307
2308 #include "glfont.c"
2309
2310 static void highlightlinks (struct page *page, int xoff, int yoff)
2311 {
2312 fz_matrix ctm, tm, pm;
2313 fz_link *link, *links;
2314 GLfloat *texcoords = state.texcoords;
2315 GLfloat *vertices = state.vertices;
2316
2317 switch (page->type) {
2318 case DPDF:
2319 links = page->u.pdfpage->links;
2320 break;
2321
2322 case DXPS:
2323 links = page->u.xpspage->links;
2324 break;
2325
2326 default:
2327 return;
2328 }
2329
2330 glEnable (GL_TEXTURE_1D);
2331 glEnable (GL_BLEND);
2332 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2333 glBindTexture (GL_TEXTURE_1D, state.stid);
2334
2335 xoff -= state.pagedims[page->pdimno].bounds.x0;
2336 yoff -= state.pagedims[page->pdimno].bounds.y0;
2337 fz_translate (&tm, xoff, yoff);
2338 pm = pagectm (page);
2339 fz_concat (&ctm, &pm, &tm);
2340
2341 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2342 glVertexPointer (2, GL_FLOAT, 0, vertices);
2343
2344 for (link = links; link; link = link->next) {
2345 fz_point p1, p2, p3, p4;
2346
2347 p1.x = link->rect.x0;
2348 p1.y = link->rect.y0;
2349
2350 p2.x = link->rect.x1;
2351 p2.y = link->rect.y0;
2352
2353 p3.x = link->rect.x1;
2354 p3.y = link->rect.y1;
2355
2356 p4.x = link->rect.x0;
2357 p4.y = link->rect.y1;
2358
2359 fz_transform_point (&p1, &ctm);
2360 fz_transform_point (&p2, &ctm);
2361 fz_transform_point (&p3, &ctm);
2362 fz_transform_point (&p4, &ctm);
2363
2364 switch (link->dest.kind) {
2365 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2366 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2367 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2368 default: glColor3ub (0, 0, 0); break;
2369 }
2370
2371 {
2372 float w, h, s, t;
2373
2374 w = p2.x - p1.x;
2375 h = p2.y - p1.y;
2376 t = sqrtf (w*w + h*h) * .25f;
2377
2378 w = p3.x - p2.x;
2379 h = p3.y - p2.y;
2380 s = sqrtf (w*w + h*h) * .25f;
2381
2382 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2383 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2384
2385 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2386 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2387
2388 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2389 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2390
2391 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2392 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2393 }
2394 glDrawArrays (GL_LINES, 0, 8);
2395 }
2396
2397 glDisable (GL_BLEND);
2398 glDisable (GL_TEXTURE_1D);
2399 }
2400
2401 static int compareslinks (const void *l, const void *r)
2402 {
2403 struct slink const *ls = l;
2404 struct slink const *rs = r;
2405 if (ls->bbox.y0 == rs->bbox.y0) {
2406 return rs->bbox.x0 - rs->bbox.x0;
2407 }
2408 return ls->bbox.y0 - rs->bbox.y0;
2409 }
2410
2411 static void droptext (struct page *page)
2412 {
2413 if (page->text) {
2414 fz_free_text_page (state.ctx, page->text);
2415 page->fmark.i = -1;
2416 page->lmark.i = -1;
2417 page->fmark.span = NULL;
2418 page->lmark.span = NULL;
2419 page->text = NULL;
2420 }
2421 if (page->sheet) {
2422 fz_free_text_sheet (state.ctx, page->sheet);
2423 page->sheet = NULL;
2424 }
2425 }
2426
2427 static void dropslinks (struct page *page)
2428 {
2429 if (page->slinks) {
2430 free (page->slinks);
2431 page->slinks = NULL;
2432 page->slinkcount = 0;
2433 }
2434 }
2435
2436 static void ensureslinks (struct page *page)
2437 {
2438 fz_matrix ctm;
2439 int i, count = 0;
2440 size_t slinksize = sizeof (*page->slinks);
2441 fz_link *link, *links;
2442
2443 if (state.gen != page->sgen) {
2444 dropslinks (page);
2445 page->sgen = state.gen;
2446 }
2447 if (page->slinks) return;
2448
2449 switch (page->type) {
2450 case DPDF:
2451 links = page->u.pdfpage->links;
2452 trimctm (page->u.pdfpage, page->pdimno);
2453 fz_concat (&ctm,
2454 &state.pagedims[page->pdimno].tctm,
2455 &state.pagedims[page->pdimno].ctm);
2456 break;
2457
2458 case DXPS:
2459 links = page->u.xpspage->links;
2460 ctm = state.pagedims[page->pdimno].ctm;
2461 break;
2462
2463 default:
2464 return;
2465 }
2466
2467 for (link = links; link; link = link->next) {
2468 count++;
2469 }
2470 if (count > 0) {
2471 page->slinkcount = count;
2472 page->slinks = calloc (count, slinksize);
2473 if (!page->slinks) {
2474 err (1, "realloc slinks %d", count);
2475 }
2476
2477 for (i = 0, link = links; link; ++i, link = link->next) {
2478 fz_rect rect;
2479
2480 rect = link->rect;
2481 fz_transform_rect (&rect, &ctm);
2482 page->slinks[i].link = link;
2483 fz_round_rect (&page->slinks[i].bbox, &rect);
2484 }
2485 qsort (page->slinks, count, slinksize, compareslinks);
2486 }
2487 }
2488
2489 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2490 static void fmt_linkn (char *s, unsigned int u)
2491 {
2492 unsigned int len; unsigned int q;
2493 int zma = 'z' - 'a' + 1;
2494 len = 1; q = u;
2495 while (q > zma - 1) { ++len; q /= zma; }
2496 if (s) {
2497 s += len;
2498 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2499 /* handles u == 0 */
2500 }
2501 s[len] = 0;
2502 }
2503
2504 static void highlightslinks (struct page *page, int xoff, int yoff,
2505 int noff, char *targ, int tlen, int hfsize)
2506 {
2507 int i;
2508 char buf[40];
2509 struct slink *slink;
2510 double x0, y0, x1, y1, w;
2511
2512 ensureslinks (page);
2513 glColor3ub (0xc3, 0xb0, 0x91);
2514 for (i = 0; i < page->slinkcount; ++i) {
2515 fmt_linkn (buf, i + noff);
2516 if (!tlen || !strncmp (targ, buf, tlen)) {
2517 slink = &page->slinks[i];
2518
2519 x0 = slink->bbox.x0 + xoff - 5;
2520 y1 = slink->bbox.y0 + yoff - 5;
2521 y0 = y1 + 10 + hfsize;
2522 w = measure_string (state.face, hfsize, buf);
2523 x1 = x0 + w + 10;
2524 recti (x0, y0, x1, y1);
2525 }
2526 }
2527
2528 glEnable (GL_BLEND);
2529 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2530 glEnable (GL_TEXTURE_2D);
2531 glColor3ub (0, 0, 0);
2532 for (i = 0; i < page->slinkcount; ++i) {
2533 fmt_linkn (buf, i + noff);
2534 if (!tlen || !strncmp (targ, buf, tlen)) {
2535 slink = &page->slinks[i];
2536
2537 x0 = slink->bbox.x0 + xoff;
2538 y0 = slink->bbox.y0 + yoff + hfsize;
2539 draw_string (state.face, hfsize, x0, y0, buf);
2540 }
2541 }
2542 glDisable (GL_TEXTURE_2D);
2543 glDisable (GL_BLEND);
2544 }
2545
2546 static void uploadslice (struct tile *tile, struct slice *slice)
2547 {
2548 int offset;
2549 struct slice *slice1;
2550 unsigned char *texdata;
2551
2552 offset = 0;
2553 for (slice1 = tile->slices; slice != slice1; slice1++) {
2554 offset += slice1->h * tile->w * tile->pixmap->n;
2555 }
2556 if (slice->texindex != -1 && slice->texindex < state.texcount
2557 && state.texowners[slice->texindex].slice == slice) {
2558 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2559 }
2560 else {
2561 int subimage = 0;
2562 int texindex = state.texindex++ % state.texcount;
2563
2564 if (state.texowners[texindex].w == tile->w) {
2565 if (state.texowners[texindex].h >= slice->h) {
2566 subimage = 1;
2567 }
2568 else {
2569 state.texowners[texindex].h = slice->h;
2570 }
2571 }
2572 else {
2573 state.texowners[texindex].h = slice->h;
2574 }
2575
2576 state.texowners[texindex].w = tile->w;
2577 state.texowners[texindex].slice = slice;
2578 slice->texindex = texindex;
2579
2580 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2581 if (tile->pbo) {
2582 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2583 texdata = 0;
2584 }
2585 else {
2586 texdata = tile->pixmap->samples;
2587 }
2588 if (subimage) {
2589 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2590 0,
2591 0,
2592 0,
2593 tile->w,
2594 slice->h,
2595 state.texform,
2596 state.texty,
2597 texdata+offset
2598 );
2599 }
2600 else {
2601 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2602 0,
2603 state.texiform,
2604 tile->w,
2605 slice->h,
2606 0,
2607 state.texform,
2608 state.texty,
2609 texdata+offset
2610 );
2611 }
2612 if (tile->pbo) {
2613 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2614 }
2615 }
2616 }
2617
2618 CAMLprim value ml_begintiles (value unit_v)
2619 {
2620 CAMLparam1 (unit_v);
2621 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2622 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2623 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2624 CAMLreturn (unit_v);
2625 }
2626
2627 CAMLprim value ml_endtiles (value unit_v)
2628 {
2629 CAMLparam1 (unit_v);
2630 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2631 CAMLreturn (unit_v);
2632 }
2633
2634 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2635 {
2636 CAMLparam2 (args_v, ptr_v);
2637 int dispx = Int_val (Field (args_v, 0));
2638 int dispy = Int_val (Field (args_v, 1));
2639 int dispw = Int_val (Field (args_v, 2));
2640 int disph = Int_val (Field (args_v, 3));
2641 int tilex = Int_val (Field (args_v, 4));
2642 int tiley = Int_val (Field (args_v, 5));
2643 char *s = String_val (ptr_v);
2644 struct tile *tile = parse_pointer ("ml_drawtile", s);
2645 int slicey, firstslice;
2646 struct slice *slice;
2647 GLfloat *texcoords = state.texcoords;
2648 GLfloat *vertices = state.vertices;
2649
2650 firstslice = tiley / tile->sliceheight;
2651 slice = &tile->slices[firstslice];
2652 slicey = tiley % tile->sliceheight;
2653
2654 while (disph > 0) {
2655 int dh;
2656
2657 dh = slice->h - slicey;
2658 dh = MIN (disph, dh);
2659 uploadslice (tile, slice);
2660
2661 texcoords[0] = tilex; texcoords[1] = slicey;
2662 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2663 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2664 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2665
2666 vertices[0] = dispx; vertices[1] = dispy;
2667 vertices[2] = dispx+dispw; vertices[3] = dispy;
2668 vertices[4] = dispx; vertices[5] = dispy+dh;
2669 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2670
2671 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2672 dispy += dh;
2673 disph -= dh;
2674 slice++;
2675 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2676 slicey = 0;
2677 }
2678 CAMLreturn (Val_unit);
2679 }
2680
2681 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2682 value xoff_v, value yoff_v,
2683 value li_v)
2684 {
2685 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2686 int xoff = Int_val (xoff_v);
2687 int yoff = Int_val (yoff_v);
2688 int noff = Int_val (Field (li_v, 0));
2689 char *targ = String_val (Field (li_v, 1));
2690 int tlen = caml_string_length (Field (li_v, 1));
2691 int hfsize = Int_val (Field (li_v, 2));
2692 char *s = String_val (ptr_v);
2693 int hlmask = Int_val (hlinks_v);
2694 struct page *page = parse_pointer ("ml_postprocess", s);
2695
2696 if (!page->u.ptr) {
2697 /* deal with loadpage failed pages */
2698 goto done;
2699 }
2700
2701 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2702 if (trylock ("ml_postprocess")) {
2703 noff = 0;
2704 goto done;
2705 }
2706 if (hlmask & 2) {
2707 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2708 noff = page->slinkcount;
2709 }
2710 if (page->tgen == state.gen) {
2711 showsel (page, xoff, yoff);
2712 }
2713 unlock ("ml_postprocess");
2714
2715 done:
2716 CAMLreturn (Val_int (noff));
2717 }
2718
2719 static fz_link *getlink (struct page *page, int x, int y)
2720 {
2721 fz_point p;
2722 fz_matrix ctm;
2723 const fz_matrix *tctm;
2724 fz_link *link, *links;
2725
2726 switch (page->type) {
2727 case DPDF:
2728 trimctm (page->u.pdfpage, page->pdimno);
2729 tctm = &state.pagedims[page->pdimno].tctm;
2730 links = page->u.pdfpage->links;
2731 break;
2732
2733 case DXPS:
2734 tctm = &fz_identity;
2735 links = page->u.xpspage->links;
2736 break;
2737
2738 default:
2739 return NULL;
2740 }
2741 p.x = x;
2742 p.y = y;
2743
2744 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2745 fz_invert_matrix (&ctm, &ctm);
2746 fz_transform_point (&p, &ctm);
2747
2748 for (link = links; link; link = link->next) {
2749 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2750 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2751 return link;
2752 }
2753 }
2754 }
2755 return NULL;
2756 }
2757
2758 static void ensuretext (struct page *page)
2759 {
2760 if (state.gen != page->tgen) {
2761 droptext (page);
2762 page->tgen = state.gen;
2763 }
2764 if (!page->text) {
2765 fz_matrix ctm;
2766 fz_device *tdev;
2767
2768 page->text = fz_new_text_page (state.ctx);
2769 page->sheet = fz_new_text_sheet (state.ctx);
2770 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2771 ctm = pagectm (page);
2772 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2773 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2774 qsort (page->text->blocks, page->text->len,
2775 sizeof (*page->text->blocks), compareblocks);
2776 fz_end_page (tdev);
2777 fz_free_device (tdev);
2778 }
2779 }
2780
2781 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2782 {
2783 CAMLparam2 (start_page_v, dir_v);
2784 CAMLlocal1 (ret_v);
2785 int i, dir = Int_val (dir_v);
2786 int start_page = Int_val (start_page_v);
2787 int end_page = dir > 0 ? state.pagecount : -1;
2788
2789 ret_v = Val_int (0);
2790 if (!(state.type == DPDF || state.type == DXPS)) {
2791 goto done;
2792 }
2793
2794 lock ("ml_findpage_with_links");
2795 for (i = start_page + dir; i != end_page; i += dir) {
2796 int found;
2797
2798 switch (state.type) {
2799 case DPDF:
2800 {
2801 pdf_page *page = NULL;
2802
2803 fz_try (state.ctx) {
2804 page = pdf_load_page (state.u.pdf, i);
2805 found = !!page->links;
2806 }
2807 fz_catch (state.ctx) {
2808 found = 0;
2809 }
2810 if (page) {
2811 freepdfpage (page);
2812 }
2813 }
2814 break;
2815 case DXPS:
2816 {
2817 xps_page *page = xps_load_page (state.u.xps, i);
2818 found = !!page->links;
2819 freexpspage (page);
2820 }
2821 break;
2822
2823 default:
2824 ARSERT (0 && "invalid document type");
2825 }
2826
2827 if (found) {
2828 ret_v = caml_alloc_small (1, 1);
2829 Field (ret_v, 0) = Val_int (i);
2830 goto unlock;
2831 }
2832 }
2833 unlock:
2834 unlock ("ml_findpage_with_links");
2835
2836 done:
2837 CAMLreturn (ret_v);
2838 }
2839
2840 enum { dir_first, dir_last };
2841 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2842
2843 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2844 {
2845 CAMLparam2 (ptr_v, dir_v);
2846 CAMLlocal2 (ret_v, pos_v);
2847 struct page *page;
2848 int dirtag, i, slinkindex;
2849 struct slink *found = NULL ,*slink;
2850 char *s = String_val (ptr_v);
2851
2852 page = parse_pointer ("ml_findlink", s);
2853 ret_v = Val_int (0);
2854 if (trylock ("ml_findlink")) {
2855 goto done;
2856 }
2857
2858 ensureslinks (page);
2859
2860 if (Is_block (dir_v)) {
2861 dirtag = Tag_val (dir_v);
2862 switch (dirtag) {
2863 case dir_first_visible:
2864 {
2865 int x0, y0, dir, first_index, last_index;
2866
2867 pos_v = Field (dir_v, 0);
2868 x0 = Int_val (Field (pos_v, 0));
2869 y0 = Int_val (Field (pos_v, 1));
2870 dir = Int_val (Field (pos_v, 2));
2871
2872 if (dir >= 0) {
2873 dir = 1;
2874 first_index = 0;
2875 last_index = page->slinkcount;
2876 }
2877 else {
2878 first_index = page->slinkcount - 1;
2879 last_index = -1;
2880 }
2881
2882 for (i = first_index; i != last_index; i += dir) {
2883 slink = &page->slinks[i];
2884 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2885 found = slink;
2886 break;
2887 }
2888 }
2889 }
2890 break;
2891
2892 case dir_left:
2893 slinkindex = Int_val (Field (dir_v, 0));
2894 found = &page->slinks[slinkindex];
2895 for (i = slinkindex - 1; i >= 0; --i) {
2896 slink = &page->slinks[i];
2897 if (slink->bbox.x0 < found->bbox.x0) {
2898 found = slink;
2899 break;
2900 }
2901 }
2902 break;
2903
2904 case dir_right:
2905 slinkindex = Int_val (Field (dir_v, 0));
2906 found = &page->slinks[slinkindex];
2907 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2908 slink = &page->slinks[i];
2909 if (slink->bbox.x0 > found->bbox.x0) {
2910 found = slink;
2911 break;
2912 }
2913 }
2914 break;
2915
2916 case dir_down:
2917 slinkindex = Int_val (Field (dir_v, 0));
2918 found = &page->slinks[slinkindex];
2919 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2920 slink = &page->slinks[i];
2921 if (slink->bbox.y0 >= found->bbox.y0) {
2922 found = slink;
2923 break;
2924 }
2925 }
2926 break;
2927
2928 case dir_up:
2929 slinkindex = Int_val (Field (dir_v, 0));
2930 found = &page->slinks[slinkindex];
2931 for (i = slinkindex - 1; i >= 0; --i) {
2932 slink = &page->slinks[i];
2933 if (slink->bbox.y0 <= found->bbox.y0) {
2934 found = slink;
2935 break;
2936 }
2937 }
2938 break;
2939 }
2940 }
2941 else {
2942 dirtag = Int_val (dir_v);
2943 switch (dirtag) {
2944 case dir_first:
2945 found = page->slinks;
2946 break;
2947
2948 case dir_last:
2949 if (page->slinks) {
2950 found = page->slinks + (page->slinkcount - 1);
2951 }
2952 break;
2953 }
2954 }
2955 if (found) {
2956 ret_v = caml_alloc_small (2, 1);
2957 Field (ret_v, 0) = Val_int (found - page->slinks);
2958 }
2959
2960 unlock ("ml_findlink");
2961 done:
2962 CAMLreturn (ret_v);
2963 }
2964
2965 enum { uuri, ugoto, utext, uunexpected,
2966 ulaunch, unamed, uremote, uremotedest };
2967
2968 #define LINKTOVAL \
2969 { \
2970 int pageno; \
2971 \
2972 switch (link->dest.kind) { \
2973 case FZ_LINK_GOTO: \
2974 { \
2975 fz_point p; \
2976 \
2977 pageno = link->dest.ld.gotor.page; \
2978 p.x = 0; \
2979 p.y = 0; \
2980 \
2981 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2982 p.y = link->dest.ld.gotor.lt.y; \
2983 fz_transform_point (&p, &pdim->lctm); \
2984 } \
2985 tup_v = caml_alloc_tuple (2); \
2986 ret_v = caml_alloc_small (1, ugoto); \
2987 Field (tup_v, 0) = Val_int (pageno); \
2988 Field (tup_v, 1) = Val_int (p.y); \
2989 Field (ret_v, 0) = tup_v; \
2990 } \
2991 break; \
2992 \
2993 case FZ_LINK_URI: \
2994 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2995 ret_v = caml_alloc_small (1, uuri); \
2996 Field (ret_v, 0) = str_v; \
2997 break; \
2998 \
2999 case FZ_LINK_LAUNCH: \
3000 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
3001 ret_v = caml_alloc_small (1, ulaunch); \
3002 Field (ret_v, 0) = str_v; \
3003 break; \
3004 \
3005 case FZ_LINK_NAMED: \
3006 str_v = caml_copy_string (link->dest.ld.named.named); \
3007 ret_v = caml_alloc_small (1, unamed); \
3008 Field (ret_v, 0) = str_v; \
3009 break; \
3010 \
3011 case FZ_LINK_GOTOR: \
3012 { \
3013 int rty; \
3014 \
3015 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
3016 pageno = link->dest.ld.gotor.page; \
3017 if (pageno == -1) { \
3018 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
3019 rty = uremotedest; \
3020 } \
3021 else { \
3022 gr_v = Val_int (pageno); \
3023 rty = uremote; \
3024 } \
3025 tup_v = caml_alloc_tuple (2); \
3026 ret_v = caml_alloc_small (1, rty); \
3027 Field (tup_v, 0) = str_v; \
3028 Field (tup_v, 1) = gr_v; \
3029 Field (ret_v, 0) = tup_v; \
3030 } \
3031 break; \
3032 \
3033 default: \
3034 { \
3035 char buf[80]; \
3036 \
3037 snprintf (buf, sizeof (buf), \
3038 "unhandled link kind %d", link->dest.kind); \
3039 str_v = caml_copy_string (buf); \
3040 ret_v = caml_alloc_small (1, uunexpected); \
3041 Field (ret_v, 0) = str_v; \
3042 } \
3043 break; \
3044 } \
3045 }
3046
3047 CAMLprim value ml_getlink (value ptr_v, value n_v)
3048 {
3049 CAMLparam2 (ptr_v, n_v);
3050 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3051 fz_link *link;
3052 struct page *page;
3053 struct pagedim *pdim;
3054 char *s = String_val (ptr_v);
3055
3056 ret_v = Val_int (0);
3057 if (trylock ("ml_getlink")) {
3058 goto done;
3059 }
3060
3061 page = parse_pointer ("ml_getlink", s);
3062 ensureslinks (page);
3063 pdim = &state.pagedims[page->pdimno];
3064 link = page->slinks[Int_val (n_v)].link;
3065 LINKTOVAL;
3066
3067 unlock ("ml_getlink");
3068 done:
3069 CAMLreturn (ret_v);
3070 }
3071
3072 CAMLprim value ml_getlinkcount (value ptr_v)
3073 {
3074 CAMLparam1 (ptr_v);
3075 struct page *page;
3076 char *s = String_val (ptr_v);
3077
3078 page = parse_pointer ("ml_getlinkcount", s);
3079 CAMLreturn (Val_int (page->slinkcount));
3080 }
3081
3082 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
3083 {
3084 CAMLparam2 (ptr_v, n_v);
3085 CAMLlocal1 (ret_v);
3086 struct page *page;
3087 struct slink *slink;
3088 char *s = String_val (ptr_v);
3089
3090 page = parse_pointer ("ml_getlinkrect", s);
3091 ret_v = caml_alloc_tuple (4);
3092 if (trylock ("ml_getlinkrect")) {
3093 Field (ret_v, 0) = Val_int (0);
3094 Field (ret_v, 1) = Val_int (0);
3095 Field (ret_v, 2) = Val_int (0);
3096 Field (ret_v, 3) = Val_int (0);
3097 goto done;
3098 }
3099 ensureslinks (page);
3100
3101 slink = &page->slinks[Int_val (n_v)];
3102 Field (ret_v, 0) = Val_int (slink->bbox.x0);
3103 Field (ret_v, 1) = Val_int (slink->bbox.y0);
3104 Field (ret_v, 2) = Val_int (slink->bbox.x1);
3105 Field (ret_v, 3) = Val_int (slink->bbox.y1);
3106 unlock ("ml_getlinkrect");
3107
3108 done:
3109 CAMLreturn (ret_v);
3110 }
3111
3112 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3113 {
3114 CAMLparam3 (ptr_v, x_v, y_v);
3115 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3116 fz_link *link;
3117 struct page *page;
3118 char *s = String_val (ptr_v);
3119 int x = Int_val (x_v), y = Int_val (y_v);
3120 struct pagedim *pdim;
3121
3122 ret_v = Val_int (0);
3123 if (trylock ("ml_whatsunder")) {
3124 goto done;
3125 }
3126
3127 page = parse_pointer ("ml_whatsunder", s);
3128 pdim = &state.pagedims[page->pdimno];
3129 x += pdim->bounds.x0;
3130 y += pdim->bounds.y0;
3131 link = getlink (page, x, y);
3132 if (link) {
3133 LINKTOVAL;
3134 }
3135 else {
3136 fz_rect *b;
3137 fz_page_block *pageb;
3138 fz_text_block *block;
3139
3140 ensuretext (page);
3141 for (pageb = page->text->blocks;
3142 pageb < page->text->blocks + page->text->len;
3143 ++pageb) {
3144 fz_text_line *line;
3145 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3146 block = pageb->u.text;
3147
3148 b = &block->bbox;
3149 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3150 continue;
3151
3152 for (line = block->lines;
3153 line < block->lines + block->len;
3154 ++line) {
3155 fz_text_span *span;
3156
3157 b = &line->bbox;
3158 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3159 continue;
3160
3161 for (span = line->first_span; span; span = span->next) {
3162 int charnum;
3163
3164 b = &span->bbox;
3165 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3166 continue;
3167
3168 for (charnum = 0; charnum < span->len; ++charnum) {
3169 fz_rect bbox;
3170 fz_text_char_bbox (&bbox, span, charnum);
3171 b = &bbox;
3172
3173 if (x >= b->x0 && x <= b->x1
3174 && y >= b->y0 && y <= b->y1) {
3175 fz_text_style *style = span->text->style;
3176 const char *n2 =
3177 style->font && style->font->name
3178 ? style->font->name
3179 : "Span has no font name"
3180 ;
3181 FT_FaceRec *face = style->font->ft_face;
3182 if (face && face->family_name) {
3183 char *s;
3184 char *n1 = face->family_name;
3185 size_t l1 = strlen (n1);
3186 size_t l2 = strlen (n2);
3187
3188 if (l1 != l2 || memcmp (n1, n2, l1)) {
3189 s = malloc (l1 + l2 + 2);
3190 if (s) {
3191 memcpy (s, n2, l2);
3192 s[l2] = '=';
3193 memcpy (s + l2 + 1, n1, l1 + 1);
3194 str_v = caml_copy_string (s);
3195 free (s);
3196 }
3197 }
3198 }
3199 if (str_v == 0) {
3200 str_v = caml_copy_string (n2);
3201 }
3202 ret_v = caml_alloc_small (1, utext);
3203 Field (ret_v, 0) = str_v;
3204 goto unlock;
3205 }
3206 }
3207 }
3208 }
3209 }
3210 }
3211 unlock:
3212 unlock ("ml_whatsunder");
3213
3214 done:
3215 CAMLreturn (ret_v);
3216 }
3217
3218 enum { mark_page, mark_block, mark_line, mark_word };
3219
3220 static int uninteresting (int c)
3221 {
3222 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3223 || ispunct (c);
3224 }
3225
3226 CAMLprim value ml_clearmark (value ptr_v)
3227 {
3228 CAMLparam1 (ptr_v);
3229 char *s = String_val (ptr_v);
3230 struct page *page;
3231
3232 if (trylock ("ml_clearmark")) {
3233 goto done;
3234 }
3235
3236 page = parse_pointer ("ml_clearmark", s);
3237 page->fmark.span = NULL;
3238 page->lmark.span = NULL;
3239 page->fmark.i = 0;
3240 page->lmark.i = 0;
3241
3242 unlock ("ml_clearmark");
3243 done:
3244 CAMLreturn (Val_unit);
3245 }
3246
3247 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3248 {
3249 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3250 CAMLlocal1 (ret_v);
3251 fz_rect *b;
3252 struct page *page;
3253 fz_text_line *line;
3254 fz_page_block *pageb;
3255 fz_text_block *block;
3256 struct pagedim *pdim;
3257 int mark = Int_val (mark_v);
3258 char *s = String_val (ptr_v);
3259 int x = Int_val (x_v), y = Int_val (y_v);
3260
3261 ret_v = Val_bool (0);
3262 if (trylock ("ml_markunder")) {
3263 goto done;
3264 }
3265
3266 page = parse_pointer ("ml_markunder", s);
3267 pdim = &state.pagedims[page->pdimno];
3268
3269 ensuretext (page);
3270
3271 if (mark == mark_page) {
3272 int i;
3273 fz_page_block *pb1 = NULL, *pb2 = NULL;
3274
3275 for (i = 0; i < page->text->len; ++i) {
3276 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3277 pb1 = &page->text->blocks[i];
3278 break;
3279 }
3280 }
3281 if (!pb1) goto unlock;
3282
3283 for (i = page->text->len - 1; i >= 0; --i) {
3284 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3285 pb2 = &page->text->blocks[i];
3286 break;
3287 }
3288 }
3289 if (!pb2) goto unlock;
3290
3291 block = pb1->u.text;
3292
3293 page->fmark.i = 0;
3294 page->fmark.span = block->lines->first_span;
3295
3296 block = pb2->u.text;
3297 line = &block->lines[block->len - 1];
3298 page->lmark.i = line->last_span->len - 1;
3299 page->lmark.span = line->last_span;
3300 ret_v = Val_bool (1);
3301 goto unlock;
3302 }
3303
3304 x += pdim->bounds.x0;
3305 y += pdim->bounds.y0;
3306
3307 for (pageb = page->text->blocks;
3308 pageb < page->text->blocks + page->text->len;
3309 ++pageb) {
3310 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3311 block = pageb->u.text;
3312
3313 b = &block->bbox;
3314 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3315 continue;
3316
3317 if (mark == mark_block) {
3318 page->fmark.i = 0;
3319 page->fmark.span = block->lines->first_span;
3320
3321 line = &block->lines[block->len - 1];
3322 page->lmark.i = line->last_span->len - 1;
3323 page->lmark.span = line->last_span;
3324 ret_v = Val_bool (1);
3325 goto unlock;
3326 }
3327
3328 for (line = block->lines;
3329 line < block->lines + block->len;
3330 ++line) {
3331 fz_text_span *span;
3332
3333 b = &line->bbox;
3334 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3335 continue;
3336
3337 if (mark == mark_line) {
3338 page->fmark.i = 0;
3339 page->fmark.span = line->first_span;
3340
3341 page->lmark.i = line->last_span->len - 1;
3342 page->lmark.span = line->last_span;
3343 ret_v = Val_bool (1);
3344 goto unlock;
3345 }
3346
3347 for (span = line->first_span; span; span = span->next) {
3348 int charnum;
3349
3350 b = &span->bbox;
3351 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3352 continue;
3353
3354 for (charnum = 0; charnum < span->len; ++charnum) {
3355 fz_rect bbox;
3356 fz_text_char_bbox (&bbox, span, charnum);
3357 b = &bbox;
3358
3359 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3360 /* unicode ftw */
3361 int charnum2, charnum3 = -1, charnum4 = -1;
3362
3363 if (uninteresting (span->text[charnum].c)) goto unlock;
3364
3365 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3366 if (uninteresting (span->text[charnum2].c)) {
3367 charnum3 = charnum2 + 1;
3368 break;
3369 }
3370 }
3371 if (charnum3 == -1) charnum3 = 0;
3372
3373 for (charnum2 = charnum + 1;
3374 charnum2 < span->len;
3375 ++charnum2) {
3376 if (uninteresting (span->text[charnum2].c)) break;
3377 charnum4 = charnum2;
3378 }
3379 if (charnum4 == -1) goto unlock;
3380
3381 page->fmark.i = charnum3;
3382 page->fmark.span = span;
3383
3384 page->lmark.i = charnum4;
3385 page->lmark.span = span;
3386 ret_v = Val_bool (1);
3387 goto unlock;
3388 }
3389 }
3390 }
3391 }
3392 }
3393 unlock:
3394 if (!Bool_val (ret_v)) {
3395 page->fmark.span = NULL;
3396 page->lmark.span = NULL;
3397 page->fmark.i = 0;
3398 page->lmark.i = 0;
3399 }
3400 unlock ("ml_markunder");
3401
3402 done:
3403 CAMLreturn (ret_v);
3404 }
3405
3406 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3407 {
3408 CAMLparam3 (ptr_v, x_v, y_v);
3409 CAMLlocal2 (ret_v, res_v);
3410 fz_rect *b = NULL;
3411 struct page *page;
3412 fz_page_block *pageb;
3413 struct pagedim *pdim;
3414 char *s = String_val (ptr_v);
3415 int x = Int_val (x_v), y = Int_val (y_v);
3416
3417 ret_v = Val_int (0);
3418 if (trylock ("ml_rectofblock")) {
3419 goto done;
3420 }
3421
3422 page = parse_pointer ("ml_rectofblock", s);
3423 pdim = &state.pagedims[page->pdimno];
3424 x += pdim->bounds.x0;
3425 y += pdim->bounds.y0;
3426
3427 ensuretext (page);
3428
3429 for (pageb = page->text->blocks;
3430 pageb < page->text->blocks + page->text->len;
3431 ++pageb) {
3432 switch (pageb->type) {
3433 case FZ_PAGE_BLOCK_TEXT:
3434 b = &pageb->u.text->bbox;
3435 break;
3436
3437 case FZ_PAGE_BLOCK_IMAGE:
3438 b = &pageb->u.image->bbox;
3439 break;
3440
3441 default:
3442 continue;
3443 }
3444
3445 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3446 break;
3447 b = NULL;
3448 }
3449 if (b) {
3450 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3451 ret_v = caml_alloc_small (1, 1);
3452 Store_double_field (res_v, 0, b->x0);
3453 Store_double_field (res_v, 1, b->x1);
3454 Store_double_field (res_v, 2, b->y0);
3455 Store_double_field (res_v, 3, b->y1);
3456 Field (ret_v, 0) = res_v;
3457 }
3458 unlock ("ml_rectofblock");
3459
3460 done:
3461 CAMLreturn (ret_v);
3462 }
3463
3464 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3465 {
3466 CAMLparam2 (ptr_v, rect_v);
3467 fz_rect b;
3468 struct page *page;
3469 struct pagedim *pdim;
3470 char *s = String_val (ptr_v);
3471 int i, x0, x1, y0, y1, fi, li;
3472 fz_text_line *line;
3473 fz_page_block *pageb;
3474 fz_text_block *block;
3475 fz_text_span *span, *fspan, *lspan;
3476
3477 if (trylock ("ml_seltext")) {
3478 goto done;
3479 }
3480
3481 page = parse_pointer ("ml_seltext", s);
3482 ensuretext (page);
3483
3484 pdim = &state.pagedims[page->pdimno];
3485 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3486 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3487 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3488 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3489
3490 if (y0 > y1) {
3491 int t = y0;
3492 y0 = y1;
3493 y1 = t;
3494 x0 = x1;
3495 x1 = t;
3496 }
3497
3498 if (0) {
3499 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3500 glColor3ub (128, 128, 128);
3501 recti (x0, y0, x1, y1);
3502 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3503 }
3504
3505 fi = page->fmark.i;
3506 fspan = page->fmark.span;
3507
3508 li = page->lmark.i;
3509 lspan = page->lmark.span;
3510
3511 for (pageb = page->text->blocks;
3512 pageb < page->text->blocks + page->text->len;
3513 ++pageb) {
3514 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3515 block = pageb->u.text;
3516 for (line = block->lines;
3517 line < block->lines + block->len;
3518 ++line) {
3519 fz_text_span *span;
3520
3521 for (span = line->first_span; span; span = span->next) {
3522 for (i = 0; i < span->len; ++i) {
3523 int selected = 0;
3524
3525 fz_text_char_bbox (&b, span, i);
3526
3527 if (x0 >= b.x0 && x0 <= b.x1
3528 && y0 >= b.y0 && y0 <= b.y1) {
3529 fspan = span;
3530 fi = i;
3531 selected = 1;
3532 }
3533 if (x1 >= b.x0 && x1 <= b.x1
3534 && y1 >= b.y0 && y1 <= b.y1) {
3535 lspan = span;
3536 li = i;
3537 selected = 1;
3538 }
3539 if (0 && selected) {
3540 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3541 glColor3ub (128, 128, 128);
3542 recti (b.x0, b.y0, b.x1, b.y1);
3543 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3544 }
3545 }
3546 }
3547 }
3548 }
3549 if (x1 < x0 && fspan == lspan) {
3550 i = fi;
3551 span = fspan;
3552
3553 fi = li;
3554 fspan = lspan;
3555
3556 li = i;
3557 lspan = span;
3558 }
3559
3560 page->fmark.i = fi;
3561 page->fmark.span = fspan;
3562
3563 page->lmark.i = li;
3564 page->lmark.span = lspan;
3565
3566 unlock ("ml_seltext");
3567
3568 done:
3569 CAMLreturn (Val_unit);
3570 }
3571
3572 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3573 {
3574 char buf[4];
3575 int i, len, ret;
3576
3577 for (i = a; i <= b; ++i) {
3578 len = fz_runetochar (buf, span->text[i].c);
3579 ret = fwrite (buf, len, 1, f);
3580
3581 if (ret != 1) {
3582 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3583 len, ret, strerror (errno));
3584 return -1;
3585 }
3586 }
3587 return 0;
3588 }
3589
3590 #ifdef __CYGWIN__
3591 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3592 {
3593 caml_failwith ("ml_popen not implemented under Cygwin");
3594 }
3595 #else
3596 CAMLprim value ml_popen (value command_v, value fds_v)
3597 {
3598 CAMLparam2 (command_v, fds_v);
3599 CAMLlocal2 (l_v, tup_v);
3600 int ret;
3601 char *msg = NULL;
3602 value earg_v = Nothing;
3603 posix_spawnattr_t attr;
3604 posix_spawn_file_actions_t fa;
3605 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
3606
3607 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3608 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3609 }
3610
3611 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3612 msg = "posix_spawnattr_init";
3613 goto fail1;
3614 }
3615
3616 #ifdef POSIX_SPAWN_USEVFORK
3617 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3618 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3619 goto fail;
3620 }
3621 #endif
3622
3623 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3624 int fd1, fd2;
3625
3626 tup_v = Field (l_v, 0);
3627 fd1 = Int_val (Field (tup_v, 0));
3628 fd2 = Int_val (Field (tup_v, 1));
3629 if (fd2 < 0) {
3630 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3631 msg = "posix_spawn_file_actions_addclose";
3632 earg_v = tup_v;
3633 goto fail;
3634 }
3635 }
3636 else {
3637 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3638 msg = "posix_spawn_file_actions_adddup2";
3639 earg_v = tup_v;
3640 goto fail;
3641 }
3642 }
3643 }
3644
3645 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3646 msg = "posix_spawn";
3647 goto fail;
3648 }
3649
3650 fail:
3651 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3652 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3653 }
3654
3655 fail1:
3656 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3657 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3658 strerror (ret));
3659 }
3660
3661 if (msg)
3662 unix_error (ret, msg, earg_v);
3663
3664 CAMLreturn (Val_unit);
3665 }
3666 #endif
3667
3668 CAMLprim value ml_hassel (value ptr_v)
3669 {
3670 CAMLparam1 (ptr_v);
3671 CAMLlocal1 (ret_v);
3672 struct page *page;
3673 char *s = String_val (ptr_v);
3674
3675 ret_v = Val_bool (0);
3676 if (trylock ("ml_hassel")) {
3677 goto done;
3678 }
3679
3680 page = parse_pointer ("ml_hassel", s);
3681 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3682 unlock ("ml_hassel");
3683 done:
3684 CAMLreturn (ret_v);
3685 }
3686
3687 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3688 {
3689 CAMLparam2 (fd_v, ptr_v);
3690 FILE *f;
3691 int seen = 0;
3692 struct page *page;
3693 fz_text_line *line;
3694 fz_page_block *pageb;
3695 fz_text_block *block;
3696 int fd = Int_val (fd_v);
3697 char *s = String_val (ptr_v);
3698
3699 if (trylock ("ml_copysel")) {
3700 goto done;
3701 }
3702
3703 page = parse_pointer ("ml_copysel", s);
3704
3705 if (!page->fmark.span || !page->lmark.span) {
3706 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3707 goto unlock;
3708 }
3709
3710 f = fdopen (fd, "w");
3711 if (!f) {
3712 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3713 fd, strerror (errno));
3714 f = stdout;
3715 }
3716
3717 for (pageb = page->text->blocks;
3718 pageb < page->text->blocks + page->text->len;
3719 ++pageb) {
3720 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3721 block = pageb->u.text;
3722 for (line = block->lines;
3723 line < block->lines + block->len;
3724 ++line) {
3725 fz_text_span *span;
3726
3727 for (span = line->first_span; span; span = span->next) {
3728 int a, b;
3729
3730 seen |= span == page->fmark.span || span == page->lmark.span;
3731 a = span == page->fmark.span ? page->fmark.i : 0;
3732 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3733
3734 if (seen) {
3735 if (pipespan (f, span, a, b)) {
3736 goto close;
3737 }
3738 if (span == page->lmark.span) {
3739 goto close;
3740 }
3741 if (span == line->last_span) {
3742 if (putc ('\n', f) == EOF) {
3743 fprintf (stderr,
3744 "failed break line on sel pipe: %s\n",
3745 strerror (errno));
3746 goto close;
3747 }
3748 }
3749 }
3750 }
3751 }
3752 }
3753 close:
3754 if (f != stdout) {
3755 int ret = fclose (f);
3756 fd = -1;
3757 if (ret == -1) {
3758 if (errno != ECHILD) {
3759 fprintf (stderr, "failed to close sel pipe: %s\n",
3760 strerror (errno));
3761 }
3762 }
3763 }
3764 unlock:
3765 unlock ("ml_copysel");
3766
3767 done:
3768 if (fd >= 0) {
3769 if (close (fd)) {
3770 fprintf (stderr, "failed to close sel pipe: %s\n",
3771 strerror (errno));
3772 }
3773 }
3774 CAMLreturn (Val_unit);
3775 }
3776
3777 CAMLprim value ml_getpdimrect (value pagedimno_v)
3778 {
3779 CAMLparam1 (pagedimno_v);
3780 CAMLlocal1 (ret_v);
3781 int pagedimno = Int_val (pagedimno_v);
3782 fz_rect box;
3783
3784 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3785 if (trylock ("ml_getpdimrect")) {
3786 box = fz_empty_rect;
3787 }
3788 else {
3789 box = state.pagedims[pagedimno].mediabox;
3790 unlock ("ml_getpdimrect");
3791 }
3792
3793 Store_double_field (ret_v, 0, box.x0);
3794 Store_double_field (ret_v, 1, box.x1);
3795 Store_double_field (ret_v, 2, box.y0);
3796 Store_double_field (ret_v, 3, box.y1);
3797
3798 CAMLreturn (ret_v);
3799 }
3800
3801 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3802 value dw_v, value cols_v)
3803 {
3804 CAMLparam3 (winw_v, winh_v, dw_v);
3805 CAMLlocal1 (ret_v);
3806 int i;
3807 double zoom = -1.;
3808 double maxh = 0.0;
3809 struct pagedim *p;
3810 double winw = Int_val (winw_v);
3811 double winh = Int_val (winh_v);
3812 double dw = Int_val (dw_v);
3813 double cols = Int_val (cols_v);
3814 double pw = 1.0, ph = 1.0;
3815
3816 if (trylock ("ml_zoom_for_height")) {
3817 goto done;
3818 }
3819
3820 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3821 double w = p->pagebox.x1 / cols;
3822 double h = p->pagebox.y1;
3823 if (h > maxh) {
3824 maxh = h;
3825 ph = h;
3826 if (state.fitmodel != FitProportional) pw = w;
3827 }
3828 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3829 }
3830
3831 zoom = (((winh / ph) * pw) + dw) / winw;
3832 unlock ("ml_zoom_for_height");
3833 done:
3834 ret_v = caml_copy_double (zoom);
3835 CAMLreturn (ret_v);
3836 }
3837
3838 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3839 {
3840 CAMLparam4 (pt_v, x_v, y_v, string_v);
3841 CAMLlocal1 (ret_v);
3842 int pt = Int_val(pt_v);
3843 int x = Int_val (x_v);
3844 int y = Int_val (y_v);
3845 double w;
3846
3847 w = draw_string (state.face, pt, x, y, String_val (string_v));
3848 ret_v = caml_copy_double (w);
3849 CAMLreturn (ret_v);
3850 }
3851
3852 CAMLprim value ml_measure_string (value pt_v, value string_v)
3853 {
3854 CAMLparam2 (pt_v, string_v);
3855 CAMLlocal1 (ret_v);
3856 int pt = Int_val (pt_v);
3857 double w;
3858
3859 w = measure_string (state.face, pt, String_val (string_v));
3860 ret_v = caml_copy_double (w);
3861 CAMLreturn (ret_v);
3862 }
3863
3864 CAMLprim value ml_getpagebox (value opaque_v)
3865 {
3866 CAMLparam1 (opaque_v);
3867 CAMLlocal1 (ret_v);
3868 fz_rect rect;
3869 fz_irect bbox;
3870 fz_matrix ctm;
3871 fz_device *dev;
3872 char *s = String_val (opaque_v);
3873 struct page *page = parse_pointer ("ml_getpagebox", s);
3874
3875 ret_v = caml_alloc_tuple (4);
3876 dev = fz_new_bbox_device (state.ctx, &rect);
3877 dev->hints |= FZ_IGNORE_SHADE;
3878
3879 switch (page->type) {
3880 case DPDF:
3881 ctm = pagectm (page);
3882 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3883 break;
3884
3885 case DXPS:
3886 ctm = pagectm (page);
3887 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3888 break;
3889
3890 default:
3891 rect = fz_infinite_rect;
3892 break;
3893 }
3894
3895 fz_free_device (dev);
3896 fz_round_rect (&bbox, &rect);
3897 Field (ret_v, 0) = Val_int (bbox.x0);
3898 Field (ret_v, 1) = Val_int (bbox.y0);
3899 Field (ret_v, 2) = Val_int (bbox.x1);
3900 Field (ret_v, 3) = Val_int (bbox.y1);
3901
3902 CAMLreturn (ret_v);
3903 }
3904
3905 CAMLprim value ml_setaalevel (value level_v)
3906 {
3907 CAMLparam1 (level_v);
3908
3909 state.aalevel = Int_val (level_v);
3910 CAMLreturn (Val_unit);
3911 }
3912
3913 #undef pixel
3914 #include <X11/Xlib.h>
3915 #include <GL/glx.h>
3916
3917 static struct {
3918 Display *dpy;
3919 GLXContext ctx;
3920 GLXDrawable drawable;
3921 } glx;
3922
3923 #include "keysym2ucs.c"
3924
3925 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3926 {
3927 CAMLparam1 (keysym_v);
3928 CAMLlocal1 (str_v);
3929 KeySym keysym = Int_val (keysym_v);
3930 Rune rune;
3931 int len;
3932 char buf[5];
3933
3934 rune = keysym2ucs (keysym);
3935 len = fz_runetochar (buf, rune);
3936 buf[len] = 0;
3937 str_v = caml_copy_string (buf);
3938 CAMLreturn (str_v);
3939 }
3940
3941 CAMLprim value ml_glx (value win_v)
3942 {
3943 CAMLparam1 (win_v);
3944 XVisualInfo *visual;
3945 int screen, wid = Int_val (win_v);
3946 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3947
3948 glx.dpy = XOpenDisplay (NULL);
3949 if (!glx.dpy) {
3950 caml_failwith ("XOpenDisplay");
3951 }
3952
3953 screen = DefaultScreen (glx.dpy);
3954 visual = glXChooseVisual (glx.dpy, screen, attributes);
3955 if (!visual) {
3956 XCloseDisplay (glx.dpy);
3957 glx.dpy = NULL;
3958 caml_failwith ("glXChooseVisual");
3959 }
3960
3961 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3962 XFree (visual);
3963 if (!glx.ctx) {
3964 XCloseDisplay (glx.dpy);
3965 glx.dpy = NULL;
3966 caml_failwith ("glXCreateContext");
3967 }
3968
3969 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3970 glXDestroyContext (glx.dpy, glx.ctx);
3971 XCloseDisplay (glx.dpy);
3972 glx.dpy = NULL;
3973 glx.ctx = NULL;
3974 caml_failwith ("glXMakeCurrent");
3975 }
3976 glx.drawable = wid;
3977 CAMLreturn (Val_unit);
3978 }
3979
3980 CAMLprim value ml_swapb (value unit_v)
3981 {
3982 CAMLparam1 (unit_v);
3983 glXSwapBuffers (glx.dpy, glx.drawable);
3984 CAMLreturn (Val_unit);
3985 }
3986
3987 CAMLprim value ml_glxsync (value unit_v)
3988 {
3989 CAMLparam1 (unit_v);
3990 if (glx.dpy && glx.ctx) {
3991 glXWaitX ();
3992 glXWaitGL ();
3993 }
3994 CAMLreturn (Val_unit);
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, pbo);
4081 if (res < 0) {
4082 err (1, "snprintf %" FMT_ptr " failed", 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, pbo);
4089 if (res < 0) {
4090 err (1, "sprintf %" FMT_ptr " failed", 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 pipe_v, value params_v)
4317 {
4318 CAMLparam2 (pipe_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.cr = Int_val (Field (pipe_v, 0));
4329 state.cw = Int_val (Field (pipe_v, 1));
4330 state.rotate = Int_val (Field (params_v, 0));
4331 state.fitmodel = Int_val (Field (params_v, 1));
4332 trim_v = Field (params_v, 2);
4333 texcount = Int_val (Field (params_v, 3));
4334 state.sliceheight = Int_val (Field (params_v, 4));
4335 mustoresize = Int_val (Field (params_v, 5));
4336 colorspace = Int_val (Field (params_v, 6));
4337 fontpath = String_val (Field (params_v, 7));
4338
4339 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4340 if (!state.trimcachepath) {
4341 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4342 strerror (errno));
4343 }
4344 haspboext = Bool_val (Field (params_v, 9));
4345
4346 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4347
4348 #ifdef USE_FONTCONFIG
4349 fz_install_load_system_font_funcs (
4350 state.ctx, fc_load_system_font_func, NULL
4351 );
4352 #endif
4353
4354 state.trimmargins = Bool_val (Field (trim_v, 0));
4355 fuzz_v = Field (trim_v, 1);
4356 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4357 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4358 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4359 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4360
4361 set_tex_params (colorspace);
4362
4363 if (*fontpath) {
4364 #ifndef USE_FONTCONFIG
4365 state.face = load_font (fontpath);
4366 #else
4367 FcChar8 *path;
4368 FcResult result;
4369 char *buf = fontpath;
4370 FcPattern *pat, *pat1;
4371
4372 fc.inited = 1;
4373 fc.config = FcInitLoadConfigAndFonts ();
4374 if (!fc.config) {
4375 errx (1, "FcInitLoadConfigAndFonts failed");
4376 }
4377
4378 pat = FcNameParse ((FcChar8 *) buf);
4379 if (!pat) {
4380 errx (1, "FcNameParse failed");
4381 }
4382
4383 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4384 errx (1, "FcConfigSubstitute failed");
4385 }
4386 FcDefaultSubstitute (pat);
4387
4388 pat1 = FcFontMatch (fc.config, pat, &result);
4389 if (!pat1) {
4390 errx (1, "FcFontMatch failed");
4391 }
4392
4393 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4394 errx (1, "FcPatternGetString failed");
4395 }
4396
4397 state.face = load_font ((char *) path);
4398 FcPatternDestroy (pat);
4399 FcPatternDestroy (pat1);
4400 #endif
4401 }
4402 else {
4403 unsigned int len;
4404 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4405
4406 state.face = load_builtin_font (base, len);
4407 }
4408 if (!state.face) _exit (1);
4409
4410 realloctexts (texcount);
4411
4412 if (haspboext) {
4413 setuppbo ();
4414 }
4415
4416 makestippletex ();
4417
4418 #ifdef __CYGWIN__
4419 sa.sa_handler = SIG_IGN;
4420 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4421 #else
4422 sa.sa_handler = SIG_DFL;
4423 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4424 #endif
4425 if (sigemptyset (&sa.sa_mask)) {
4426 err (1, "sigemptyset");
4427 }
4428 if (sigaction (SIGCHLD, &sa, NULL)) {
4429 err (1, "sigaction");
4430 }
4431
4432 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4433 if (ret) {
4434 errx (1, "pthread_create: %s", strerror (ret));
4435 }
4436
4437 CAMLreturn (Val_unit);
4438 }
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