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[llpp.git] / link.c
blobebdacfa46ba8d7c1ab6e07c2953c5a79f85b22b9
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 { "cbz", DCBZ },
514 { "jpg", DIMG },
515 { "jpeg", DIMG },
516 { "png", DIMG }
517 };
518
519 for (i = 0; i < sizeof (tbl) / sizeof (*tbl); ++i) {
520 int len2 = strlen (tbl[i].ext);
521
522 if (len2 < len && !strcasecmp (tbl[i].ext, filename + len - len2)) {
523 state.type = tbl[i].type;
524 break;
525 }
526 }
527 }
528
529 if (state.pagedims) {
530 free (state.pagedims);
531 state.pagedims = NULL;
532 }
533 state.pagedimcount = 0;
534
535 fz_set_aa_level (state.ctx, state.aalevel);
536 switch (state.type) {
537 case DPDF:
538 state.u.pdf = pdf_open_document (state.ctx, filename);
539 if (pdf_needs_password (state.u.pdf)) {
540 int okay = pdf_authenticate_password (state.u.pdf, password);
541 if (!okay) {
542 errx (1, "invalid password");
543 }
544 }
545 state.pagecount = pdf_count_pages (state.u.pdf);
546 state.closedoc = closepdf;
547 state.freepage = freepdfpage;
548 break;
549
550 case DXPS:
551 state.u.xps = xps_open_document (state.ctx, filename);
552 state.pagecount = xps_count_pages (state.u.xps);
553 state.closedoc = closexps;
554 state.freepage = freexpspage;
555 break;
556
557 case DCBZ:
558 state.u.cbz = cbz_open_document (state.ctx, filename);
559 state.pagecount = cbz_count_pages (state.u.cbz);
560 state.closedoc = closecbz;
561 state.freepage = freecbzpage;
562 break;
563
564 case DIMG:
565 state.u.img = image_open_document (state.ctx, filename);
566 state.pagecount = 1;
567 state.closedoc = closeimg;
568 state.freepage = freeimgpage;
569 break;
570 }
571 }
572
573 static void pdfinfo (void)
574 {
575 if (state.type == DPDF) {
576 pdf_obj *infoobj;
577
578 printd ("info PDF version\t%d.%d",
579 state.u.pdf->version / 10, state.u.pdf->version % 10);
580
581 infoobj = pdf_dict_gets (pdf_trailer (state.u.pdf), "Info");
582 if (infoobj) {
583 int i;
584 char *s;
585 char *items[] = { "Title", "Author", "Creator",
586 "Producer", "CreationDate" };
587
588 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
589 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
590 s = pdf_to_utf8 (state.u.pdf, obj);
591 if (*s) {
592 if (i == 0) {
593 printd ("title %s", s);
594 }
595 printd ("info %s\t%s", items[i], s);
596 }
597 fz_free (state.ctx, s);
598 }
599 }
600 printd ("infoend");
601 }
602 }
603
604 static void unlinktile (struct tile *tile)
605 {
606 int i;
607
608 for (i = 0; i < tile->slicecount; ++i) {
609 struct slice *s = &tile->slices[i];
610
611 if (s->texindex != -1) {
612 if (state.texowners[s->texindex].slice == s) {
613 state.texowners[s->texindex].slice = NULL;
614 }
615 }
616 }
617 }
618
619 static void freepage (struct page *page)
620 {
621 if (page->text) {
622 fz_free_text_page (state.ctx, page->text);
623 }
624 if (page->sheet) {
625 fz_free_text_sheet (state.ctx, page->sheet);
626 }
627 if (page->slinks) {
628 free (page->slinks);
629 }
630 fz_drop_display_list (state.ctx, page->dlist);
631 page->freepage (page->u.ptr);
632 free (page);
633 }
634
635 static void freetile (struct tile *tile)
636 {
637 unlinktile (tile);
638 if (!tile->pbo) {
639 #ifndef PIGGYBACK
640 fz_drop_pixmap (state.ctx, tile->pixmap);
641 #else
642 if (state.pig) {
643 fz_drop_pixmap (state.ctx, state.pig);
644 }
645 state.pig = tile->pixmap;
646 #endif
647 }
648 else {
649 free (tile->pbo);
650 fz_drop_pixmap (state.ctx, tile->pixmap);
651 }
652 free (tile);
653 }
654
655 #ifdef __ALTIVEC__
656 #include <stdint.h>
657 #include <altivec.h>
658
659 static int cacheline32bytes;
660
661 static void __attribute__ ((constructor)) clcheck (void)
662 {
663 char **envp = environ;
664 unsigned long *auxv;
665
666 while (*envp++);
667
668 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
669 if (*auxv == 19) {
670 cacheline32bytes = auxv[1] == 32;
671 return;
672 }
673 }
674 }
675
676 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
677 {
678 size_t size = pixmap->w * pixmap->h * pixmap->n;
679 if (cacheline32bytes && size > 32) {
680 intptr_t a1, a2, diff;
681 size_t sizea, i;
682 vector unsigned char v = vec_splat_u8 (-1);
683 vector unsigned char *p;
684
685 a1 = a2 = (intptr_t) pixmap->samples;
686 a2 = (a1 + 31) & ~31;
687 diff = a2 - a1;
688 sizea = size - diff;
689 p = (void *) a2;
690
691 while (a1 != a2) *(char *) a1++ = 0xff;
692 for (i = 0; i < (sizea & ~31); i += 32) {
693 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
694 vec_st (v, i, p);
695 vec_st (v, i + 16, p);
696 }
697 while (i < sizea) *((char *) a1 + i++) = 0xff;
698 }
699 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
700 }
701 #else
702 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
703 #endif
704
705 static void trimctm (pdf_page *page, int pindex)
706 {
707 fz_matrix ctm;
708 struct pagedim *pdim = &state.pagedims[pindex];
709
710 if (!pdim->tctmready) {
711 if (state.trimmargins) {
712 fz_rect realbox;
713 fz_matrix rm, sm, tm, im, ctm1;
714
715 fz_rotate (&rm, -pdim->rotate);
716 fz_scale (&sm, 1, -1);
717 fz_concat (&ctm, &rm, &sm);
718 realbox = pdim->mediabox;
719 fz_transform_rect (&realbox, &ctm);
720 fz_translate (&tm, -realbox.x0, -realbox.y0);
721 fz_concat (&ctm1, &ctm, &tm);
722 fz_invert_matrix (&im, &page->ctm);
723 fz_concat (&ctm, &im, &ctm1);
724 }
725 else {
726 ctm = fz_identity;
727 }
728 pdim->tctm = ctm;
729 pdim->tctmready = 1;
730 }
731 }
732
733 static fz_matrix pagectm (struct page *page)
734 {
735 fz_matrix ctm, tm;
736
737 if (page->type == DPDF) {
738 trimctm (page->u.pdfpage, page->pdimno);
739 fz_concat (&ctm,
740 &state.pagedims[page->pdimno].tctm,
741 &state.pagedims[page->pdimno].ctm);
742 }
743 else {
744 struct pagedim *pdim = &state.pagedims[page->pdimno];
745
746 fz_translate (&tm, -pdim->mediabox.x0, -pdim->mediabox.y0);
747 fz_concat (&ctm, &tm, &state.pagedims[page->pdimno].ctm);
748 }
749 return ctm;
750 }
751
752 static void *loadpage (int pageno, int pindex)
753 {
754 fz_device *dev;
755 struct page *page;
756
757 page = calloc (sizeof (struct page), 1);
758 if (!page) {
759 err (1, "calloc page %d", pageno);
760 }
761
762 page->dlist = fz_new_display_list (state.ctx);
763 dev = fz_new_list_device (state.ctx, page->dlist);
764 fz_try (state.ctx) {
765 switch (state.type) {
766 case DPDF:
767 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
768 pdf_run_page (state.u.pdf, page->u.pdfpage, dev,
769 &fz_identity, NULL);
770 page->freepage = freepdfpage;
771 break;
772
773 case DXPS:
774 page->u.xpspage = xps_load_page (state.u.xps, pageno);
775 xps_run_page (state.u.xps, page->u.xpspage, dev,
776 &fz_identity, NULL);
777 page->freepage = freexpspage;
778 break;
779
780 case DCBZ:
781 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
782 cbz_run_page (state.u.cbz, page->u.cbzpage, dev,
783 &fz_identity, NULL);
784 page->freepage = freecbzpage;
785 break;
786
787 case DIMG:
788 page->u.imgpage = image_load_page (state.u.img, pageno);
789 image_run_page (state.u.img, page->u.imgpage, dev,
790 &fz_identity, NULL);
791 page->freepage = freeimgpage;
792 break;
793 }
794 }
795 fz_catch (state.ctx) {
796 page->u.ptr = NULL;
797 page->freepage = freeemptyxxxpage;
798 }
799 fz_free_device (dev);
800
801 page->pdimno = pindex;
802 page->pageno = pageno;
803 page->sgen = state.gen;
804 page->tgen = state.gen;
805 page->type = state.type;
806
807 return page;
808 }
809
810 static struct tile *alloctile (int h)
811 {
812 int i;
813 int slicecount;
814 size_t tilesize;
815 struct tile *tile;
816
817 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
818 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
819 tile = calloc (tilesize, 1);
820 if (!tile) {
821 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
822 }
823 for (i = 0; i < slicecount; ++i) {
824 int sh = MIN (h, state.sliceheight);
825 tile->slices[i].h = sh;
826 tile->slices[i].texindex = -1;
827 h -= sh;
828 }
829 tile->slicecount = slicecount;
830 tile->sliceheight = state.sliceheight;
831 return tile;
832 }
833
834 #ifdef OBSCURED_OPT
835 struct obs {
836 int cured;
837 fz_irect b;
838 };
839
840 static void obs_fill_image (fz_device *dev, fz_image *image,
841 const fz_matrix *ctm, float alpha)
842 {
843 struct obs *obs = dev->user;
844
845 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
846 fz_irect b;
847 fz_rect rect = fz_unit_rect;
848
849 fz_transform_rect (&rect, ctm);
850 fz_round_rect (&b, &rect);
851 fz_intersect_irect (&b, &obs->b);
852 obs->cured = b.x0 == obs->b.x0
853 && b.x1 == obs->b.x1
854 && b.y0 == obs->b.y0
855 && b.y1 == obs->b.y1;
856 }
857 }
858
859 static int obscured (struct page *page, fz_irect bbox)
860 {
861 fz_rect rect;
862 fz_matrix ctm;
863 fz_device dev;
864 struct obs obs;
865
866 memset (&dev, 0, sizeof (dev));
867 memset (&obs, 0, sizeof (obs));
868 dev.hints = 0;
869 dev.flags = 0;
870 dev.user = &obs;
871 dev.ctx = state.ctx;
872 dev.fill_image = obs_fill_image;
873 obs.b = bbox;
874 fz_rect_from_irect (&rect, &bbox);
875 ctm = pagectm (page);
876 fz_run_display_list (page->dlist, &dev, &ctm, &rect, NULL);
877 return obs.cured;
878 }
879 #define OBSCURED obscured
880 #else
881 #define OBSCURED(a, b) 0
882 #endif
883
884 static struct tile *rendertile (struct page *page, int x, int y, int w, int h,
885 struct pbo *pbo)
886 {
887 fz_rect rect;
888 fz_irect bbox;
889 fz_matrix ctm;
890 fz_device *dev;
891 struct tile *tile;
892 struct pagedim *pdim;
893
894 tile = alloctile (h);
895 pdim = &state.pagedims[page->pdimno];
896
897 bbox = pdim->bounds;
898 bbox.x0 += x;
899 bbox.y0 += y;
900 bbox.x1 = bbox.x0 + w;
901 bbox.y1 = bbox.y0 + h;
902
903 if (state.pig) {
904 if (state.pig->w == w
905 && state.pig->h == h
906 && state.pig->colorspace == state.colorspace) {
907 tile->pixmap = state.pig;
908 tile->pixmap->x = bbox.x0;
909 tile->pixmap->y = bbox.y0;
910 }
911 else {
912 fz_drop_pixmap (state.ctx, state.pig);
913 }
914 state.pig = NULL;
915 }
916 if (!tile->pixmap) {
917 if (pbo) {
918 tile->pixmap =
919 fz_new_pixmap_with_bbox_and_data (state.ctx, state.colorspace,
920 &bbox, pbo->ptr);
921 tile->pbo = pbo;
922 }
923 else {
924 tile->pixmap =
925 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, &bbox);
926 }
927 }
928
929 tile->w = w;
930 tile->h = h;
931 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
932 clearpixmap (tile->pixmap);
933 }
934 dev = fz_new_draw_device (state.ctx, tile->pixmap);
935 ctm = pagectm (page);
936 fz_rect_from_irect (&rect, &bbox);
937 fz_run_display_list (page->dlist, dev, &ctm, &rect, NULL);
938 fz_free_device (dev);
939
940 return tile;
941 }
942
943 #ifdef SUMATRA_LOOKUP
944 /* Following two functions are taken (almost) verbatim from SumatraPDF
945 PdfEngine.cpp
946 */
947 static void
948 pdf_load_page_objs_rec(pdf_document *doc, pdf_obj *node, int *page_no, pdf_obj **page_objs)
949 {
950 fz_context *ctx = doc->ctx;
951
952 if (pdf_mark_obj(node))
953 fz_throw(ctx, FZ_ERROR_GENERIC, "cycle in page tree");
954
955 fz_try(ctx) {
956 pdf_obj *kids = pdf_dict_gets(node, "Kids");
957 int len = pdf_array_len(kids), i;
958 for (i = 0; i < len; i++) {
959 pdf_obj *kid = pdf_array_get(kids, i);
960 char *type = pdf_to_name(pdf_dict_gets(kid, "Type"));
961 if (!strcmp(type, "Page")) {
962 if (*page_no > pdf_count_pages(doc))
963 fz_throw(ctx, FZ_ERROR_GENERIC, "found more /Page objects than anticipated");
964 page_objs[*page_no - 1] = pdf_keep_obj(kid);
965 (*page_no)++;
966 }
967 else if (!strcmp(type, "Pages")) {
968 int count = pdf_to_int(pdf_dict_gets(kid, "Count"));
969 if (count > 0)
970 pdf_load_page_objs_rec(doc, kid, page_no, page_objs);
971 }
972 else {
973 fz_warn(ctx, "non-page object in page tree (%s)", type);
974 }
975 }
976 }
977 fz_always(ctx) {
978 pdf_unmark_obj(node);
979 }
980 fz_catch(ctx) {
981 fz_rethrow(ctx);
982 }
983 }
984
985 static void
986 pdf_load_page_objs(pdf_document *doc, pdf_obj **page_objs)
987 {
988 pdf_obj *pages = pdf_dict_getp(pdf_trailer(doc), "Root/Pages");
989 int page_no = 1;
990 pdf_load_page_objs_rec(doc, pages, &page_no, page_objs);
991 }
992 #endif
993
994 static void initpdims (void)
995 {
996 double start, end;
997 FILE *trimf = NULL;
998 fz_rect rootmediabox;
999 int pageno, trim, show;
1000 int trimw = 0, cxcount;
1001
1002 start = now ();
1003
1004 if (state.trimmargins && state.trimcachepath) {
1005 trimf = fopen (state.trimcachepath, "rb");
1006 if (!trimf) {
1007 trimf = fopen (state.trimcachepath, "wb");
1008 trimw = 1;
1009 }
1010 }
1011
1012 if (state.trimmargins || state.type == DPDF || !state.cxack)
1013 cxcount = state.pagecount;
1014 else
1015 cxcount = MIN (state.pagecount, 1);
1016
1017 if (state.type == DPDF) {
1018 pdf_obj *obj;
1019 obj = pdf_dict_getp (pdf_trailer (state.u.pdf),
1020 "Root/Pages/MediaBox");
1021 pdf_to_rect (state.ctx, obj, &rootmediabox);
1022 }
1023
1024 #ifdef SUMATRA_LOOKUP
1025 if (state.type == DPDF
1026 && (!state.pdflut.objs || state.pdflut.pdf != state.u.pdf)) {
1027 state.pdflut.objs = malloc (sizeof (*state.pdflut.objs) * cxcount);
1028 if (!state.pdflut.objs) {
1029 err (1, "malloc pageobjs %zu %d %zu failed",
1030 sizeof (*state.pdflut.objs), cxcount,
1031 sizeof (*state.pdflut.objs) * cxcount);
1032 }
1033 state.pdflut.count = cxcount;
1034 pdf_load_page_objs (state.u.pdf, state.pdflut.objs);
1035 state.pdflut.pdf = state.u.pdf;
1036 }
1037 #endif
1038
1039 for (pageno = 0; pageno < cxcount; ++pageno) {
1040 int rotate = 0;
1041 struct pagedim *p;
1042 fz_rect mediabox;
1043
1044 switch (state.type) {
1045 case DPDF: {
1046 pdf_document *pdf = state.u.pdf;
1047 pdf_obj *pageref, *pageobj;
1048
1049 #ifdef SUMATRA_LOOKUP
1050 pageref = state.pdflut.objs[pageno];
1051 #else
1052 pageref = pdf_lookup_page_obj (pdf, pageno);
1053 #endif
1054 pageobj = pdf_resolve_indirect (pageref);
1055
1056 if (state.trimmargins) {
1057 pdf_obj *obj;
1058 pdf_page *page;
1059
1060 fz_try (state.ctx) {
1061 page = pdf_load_page (pdf, pageno);
1062 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
1063 trim = state.trimanew || !obj;
1064 if (trim) {
1065 fz_rect rect;
1066 fz_matrix ctm;
1067 fz_device *dev;
1068
1069 dev = fz_new_bbox_device (state.ctx, &rect);
1070 dev->hints |= FZ_IGNORE_SHADE;
1071 fz_invert_matrix (&ctm, &page->ctm);
1072 pdf_run_page (pdf, page, dev, &fz_identity, NULL);
1073 fz_free_device (dev);
1074
1075 rect.x0 += state.trimfuzz.x0;
1076 rect.x1 += state.trimfuzz.x1;
1077 rect.y0 += state.trimfuzz.y0;
1078 rect.y1 += state.trimfuzz.y1;
1079 fz_transform_rect (&rect, &ctm);
1080 fz_intersect_rect (&rect, &page->mediabox);
1081
1082 if (fz_is_empty_rect (&rect)) {
1083 mediabox = page->mediabox;
1084 }
1085 else {
1086 mediabox = rect;
1087 }
1088
1089 obj = pdf_new_array (pdf, 4);
1090 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x0));
1091 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y0));
1092 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x1));
1093 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y1));
1094 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
1095 }
1096 else {
1097 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
1098 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
1099 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
1100 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
1101 }
1102
1103 rotate = page->rotate;
1104 pdf_free_page (pdf, page);
1105
1106 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
1107 if (show) {
1108 printd ("progress %f Trimming %d",
1109 (double) (pageno + 1) / state.pagecount,
1110 pageno + 1);
1111 }
1112 }
1113 fz_catch (state.ctx) {
1114 fprintf (stderr, "failed to load page %d\n", pageno+1);
1115 }
1116 }
1117 else {
1118 int empty = 0;
1119 fz_rect cropbox;
1120
1121 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "MediaBox"),
1122 &mediabox);
1123 if (fz_is_empty_rect (&mediabox)) {
1124 mediabox.x0 = 0;
1125 mediabox.y0 = 0;
1126 mediabox.x1 = 612;
1127 mediabox.y1 = 792;
1128 empty = 1;
1129 }
1130
1131 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "CropBox"),
1132 &cropbox);
1133 if (!fz_is_empty_rect (&cropbox)) {
1134 if (empty) {
1135 mediabox = cropbox;
1136 }
1137 else {
1138 fz_intersect_rect (&mediabox, &cropbox);
1139 }
1140 }
1141 else {
1142 if (empty) {
1143 if (fz_is_empty_rect (&rootmediabox)) {
1144 fprintf (stderr,
1145 "cannot find page size for page %d\n",
1146 pageno+1);
1147 }
1148 else {
1149 mediabox = rootmediabox;
1150 }
1151 }
1152 }
1153 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
1154 }
1155 break;
1156 }
1157
1158 case DXPS:
1159 {
1160 xps_page *page;
1161
1162 fz_try (state.ctx) {
1163 page = xps_load_page (state.u.xps, pageno);
1164 xps_bound_page (state.u.xps, page, &mediabox);
1165 rotate = 0;
1166 if (state.trimmargins) {
1167 fz_rect rect;
1168 fz_device *dev;
1169
1170 dev = fz_new_bbox_device (state.ctx, &rect);
1171 dev->hints |= FZ_IGNORE_SHADE;
1172 xps_run_page (state.u.xps, page, dev,
1173 &fz_identity, NULL);
1174 fz_free_device (dev);
1175
1176 rect.x0 += state.trimfuzz.x0;
1177 rect.x1 += state.trimfuzz.x1;
1178 rect.y0 += state.trimfuzz.y0;
1179 rect.y1 += state.trimfuzz.y1;
1180 fz_intersect_rect (&rect, &mediabox);
1181
1182 if (!fz_is_empty_rect (&rect)) {
1183 mediabox = rect;
1184 }
1185 }
1186 xps_free_page (state.u.xps, page);
1187 if (!state.cxack) {
1188 printd ("progress %f loading %d",
1189 (double) (pageno + 1) / state.pagecount,
1190 pageno + 1);
1191 }
1192 }
1193 fz_catch (state.ctx) {
1194 }
1195 }
1196 break;
1197
1198 case DCBZ:
1199 {
1200 rotate = 0;
1201 mediabox.x0 = 0;
1202 mediabox.y0 = 0;
1203 mediabox.x1 = 900;
1204 mediabox.y1 = 900;
1205 if (state.trimmargins && trimw) {
1206 cbz_page *page;
1207
1208 fz_try (state.ctx) {
1209 page = cbz_load_page (state.u.cbz, pageno);
1210 cbz_bound_page (state.u.cbz, page, &mediabox);
1211 cbz_free_page (state.u.cbz, page);
1212 printd ("progress %f Trimming %d",
1213 (double) (pageno + 1) / state.pagecount,
1214 pageno + 1);
1215 }
1216 fz_catch (state.ctx) {
1217 fprintf (stderr, "failed to load page %d\n", pageno+1);
1218 }
1219 if (trimf) {
1220 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
1221 if (n - 1) {
1222 err (1, "fwrite trim mediabox");
1223 }
1224 }
1225 }
1226 else {
1227 if (trimf) {
1228 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
1229 if (n - 1) {
1230 err (1, "fread trim mediabox");
1231 }
1232 }
1233 else {
1234 if (state.cxack) {
1235 cbz_page *page;
1236 fz_try (state.ctx) {
1237 page = cbz_load_page (state.u.cbz, pageno);
1238 cbz_bound_page (state.u.cbz, page, &mediabox);
1239 cbz_free_page (state.u.cbz, page);
1240 }
1241 fz_catch (state.ctx) {
1242 fprintf (stderr, "failed to load cbz page\n");
1243 }
1244 }
1245 }
1246 }
1247 }
1248 break;
1249
1250 case DIMG:
1251 {
1252 image_page *page;
1253
1254 rotate = 0;
1255 mediabox.x0 = 0;
1256 mediabox.y0 = 0;
1257 mediabox.x1 = 900;
1258 mediabox.y1 = 900;
1259
1260 fz_try (state.ctx) {
1261 page = image_load_page (state.u.img, pageno);
1262 image_bound_page (state.u.img, page, &mediabox);
1263 image_free_page (state.u.img, page);
1264 }
1265 fz_catch (state.ctx) {
1266 fprintf (stderr, "failed to load page %d\n", pageno+1);
1267 }
1268 }
1269 break;
1270
1271 default:
1272 ARSERT (0 && state.type);
1273 }
1274
1275 if (state.pagedimcount == 0
1276 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1277 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1278 size_t size;
1279
1280 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1281 state.pagedims = realloc (state.pagedims, size);
1282 if (!state.pagedims) {
1283 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1284 size, state.pagedimcount + 1);
1285 }
1286
1287 p = &state.pagedims[state.pagedimcount++];
1288 p->rotate = rotate;
1289 p->mediabox = mediabox;
1290 p->pageno = pageno;
1291 }
1292 }
1293 end = now ();
1294 if (state.trimmargins) {
1295 printd ("progress 1 Trimmed %d pages in %f seconds",
1296 state.pagecount, end - start);
1297 }
1298 else {
1299 printd ("vmsg Processed %d pages in %f seconds",
1300 state.pagecount, end - start);
1301 }
1302 state.trimanew = 0;
1303 if (trimf) {
1304 if (fclose (trimf)) {
1305 err (1, "fclose");
1306 }
1307 }
1308 }
1309
1310 static void layout (void)
1311 {
1312 int pindex;
1313 fz_rect box;
1314 fz_matrix ctm, rm;
1315 struct pagedim *p = p;
1316 double zw, w, maxw = 0.0, zoom = zoom;
1317
1318 if (state.pagedimcount == 0) return;
1319
1320 switch (state.fitmodel) {
1321 case FitProportional:
1322 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1323 double x0, x1;
1324
1325 p = &state.pagedims[pindex];
1326 fz_rotate (&rm, p->rotate + state.rotate);
1327 box = p->mediabox;
1328 fz_transform_rect (&box, &rm);
1329
1330 x0 = MIN (box.x0, box.x1);
1331 x1 = MAX (box.x0, box.x1);
1332
1333 w = x1 - x0;
1334 maxw = MAX (w, maxw);
1335 zoom = state.w / maxw;
1336 }
1337 break;
1338
1339 case FitPage:
1340 maxw = state.w;
1341 break;
1342
1343 case FitWidth:
1344 break;
1345
1346 default:
1347 ARSERT (0 && state.fitmodel);
1348 }
1349
1350 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1351 fz_rect rect;
1352 fz_matrix tm, sm;
1353
1354 p = &state.pagedims[pindex];
1355 fz_rotate (&ctm, state.rotate);
1356 fz_rotate (&rm, p->rotate + state.rotate);
1357 box = p->mediabox;
1358 fz_transform_rect (&box, &rm);
1359 w = box.x1 - box.x0;
1360 switch (state.fitmodel) {
1361 case FitProportional:
1362 p->left = ((maxw - w) * zoom) / 2.0;
1363 break;
1364 case FitPage:
1365 {
1366 double zh, h;
1367 zw = maxw / w;
1368 h = box.y1 - box.y0;
1369 zh = state.h / h;
1370 zoom = MIN (zw, zh);
1371 p->left = (maxw - (w * zoom)) / 2.0;
1372 }
1373 break;
1374 case FitWidth:
1375 p->left = 0;
1376 zoom = state.w / w;
1377 break;
1378 }
1379
1380 fz_scale (&p->zoomctm, zoom, zoom);
1381 fz_concat (&ctm, &p->zoomctm, &ctm);
1382
1383 fz_rotate (&rm, p->rotate);
1384 p->pagebox = p->mediabox;
1385 fz_transform_rect (&p->pagebox, &rm);
1386 p->pagebox.x1 -= p->pagebox.x0;
1387 p->pagebox.y1 -= p->pagebox.y0;
1388 p->pagebox.x0 = 0;
1389 p->pagebox.y0 = 0;
1390 rect = p->pagebox;
1391 fz_transform_rect (&rect, &ctm);
1392 fz_round_rect (&p->bounds, &rect);
1393 p->ctm = ctm;
1394
1395 fz_translate (&tm, 0, -p->mediabox.y1);
1396 fz_scale (&sm, zoom, -zoom);
1397 fz_concat (&ctm, &tm, &sm);
1398 fz_concat (&p->lctm, &ctm, &rm);
1399
1400 p->tctmready = 0;
1401 }
1402
1403 do {
1404 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1405 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1406 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1407 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1408 int w = x1 - x0;
1409 int h = y1 - y0;
1410
1411 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1412 } while (p-- != state.pagedims);
1413 }
1414
1415 static
1416 struct anchor { int n; int x; int y; int w; int h; }
1417 desttoanchor (fz_link_dest *dest)
1418 {
1419 int i;
1420 struct anchor a;
1421 struct pagedim *pdim = state.pagedims;
1422
1423 a.n = -1;
1424 a.x = 0;
1425 a.y = 0;
1426 for (i = 0; i < state.pagedimcount; ++i) {
1427 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1428 break;
1429 pdim = &state.pagedims[i];
1430 }
1431 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1432 fz_point p;
1433 if (dest->ld.gotor.flags & fz_link_flag_l_valid)
1434 p.x = dest->ld.gotor.lt.x;
1435 else
1436 p.x = 0.0;
1437 p.y = dest->ld.gotor.lt.y;
1438 fz_transform_point (&p, &pdim->lctm);
1439 a.y = p.y;
1440 a.x = p.x;
1441 }
1442 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1443 double x0, x1, y0, y1;
1444
1445 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1446 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1447 a.w = x1 - x0;
1448 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1449 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1450 a.h = y1 - y0;
1451 a.n = dest->ld.gotor.page;
1452 }
1453 return a;
1454 }
1455
1456 static void recurse_outline (fz_outline *outline, int level)
1457 {
1458 while (outline) {
1459 switch (outline->dest.kind) {
1460 case FZ_LINK_GOTO:
1461 {
1462 struct anchor a = desttoanchor (&outline->dest);
1463
1464 if (a.n >= 0) {
1465 printd ("o %d %d %d %d %s",
1466 level, a.n, a.y, a.h, outline->title);
1467 }
1468 }
1469 break;
1470
1471 case FZ_LINK_URI:
1472 printd ("ou %d %" FMT_s " %s %s", level,
1473 strlen (outline->title), outline->title,
1474 outline->dest.ld.uri.uri);
1475 break;
1476
1477 case FZ_LINK_NONE:
1478 printd ("on %d %s", level, outline->title);
1479 break;
1480
1481 default:
1482 printd ("emsg Unhandled outline kind %d for %s\n",
1483 outline->dest.kind, outline->title);
1484 break;
1485 }
1486 if (outline->down) {
1487 recurse_outline (outline->down, level + 1);
1488 }
1489 outline = outline->next;
1490 }
1491 }
1492
1493 static void process_outline (void)
1494 {
1495 fz_outline *outline;
1496
1497 if (!state.needoutline) return;
1498
1499 state.needoutline = 0;
1500 switch (state.type) {
1501 case DPDF:
1502 outline = pdf_load_outline (state.u.pdf);
1503 break;
1504 case DXPS:
1505 outline = xps_load_outline (state.u.xps);
1506 break;
1507 default:
1508 outline = NULL;
1509 break;
1510 }
1511 if (outline) {
1512 recurse_outline (outline, 0);
1513 fz_free_outline (state.ctx, outline);
1514 }
1515 }
1516
1517 static char *strofspan (fz_text_span *span)
1518 {
1519 char *p;
1520 char utf8[10];
1521 fz_text_char *ch;
1522 size_t size = 0, cap = 80;
1523
1524 p = malloc (cap + 1);
1525 if (!p) return NULL;
1526
1527 for (ch = span->text; ch < span->text + span->len; ++ch) {
1528 int n = fz_runetochar (utf8, ch->c);
1529 if (size + n > cap) {
1530 cap *= 2;
1531 p = realloc (p, cap + 1);
1532 if (!p) return NULL;
1533 }
1534
1535 memcpy (p + size, utf8, n);
1536 size += n;
1537 }
1538 p[size] = 0;
1539 return p;
1540 }
1541
1542 static int matchspan (regex_t *re, fz_text_page *page,
1543 fz_text_span *span, fz_matrix ctm,
1544 int stop, int pageno, double start)
1545 {
1546 int ret;
1547 char *p;
1548 regmatch_t rm;
1549 int a, b, c;
1550 fz_rect sb, eb;
1551 fz_point p1, p2, p3, p4;
1552
1553 p = strofspan (span);
1554 if (!p) return -1;
1555
1556 ret = regexec (re, p, 1, &rm, 0);
1557 if (ret) {
1558 free (p);
1559 if (ret != REG_NOMATCH) {
1560 size_t size;
1561 char errbuf[80];
1562 size = regerror (ret, re, errbuf, sizeof (errbuf));
1563 printd ("msg regexec error `%.*s'",
1564 (int) size, errbuf);
1565 return -1;
1566 }
1567 return 0;
1568 }
1569 else {
1570 int l = span->len;
1571
1572 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1573 c += fz_runelen (span->text[a].c);
1574 }
1575 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1576 c += fz_runelen (span->text[b].c);
1577 }
1578
1579 if (fz_runelen (span->text[b].c) > 1) {
1580 b = MAX (0, b-1);
1581 }
1582
1583 fz_text_char_bbox (&sb, span, a);
1584 fz_text_char_bbox (&eb, span, b);
1585
1586 p1.x = sb.x0;
1587 p1.y = sb.y0;
1588 p2.x = eb.x1;
1589 p2.y = sb.y0;
1590 p3.x = eb.x1;
1591 p3.y = eb.y1;
1592 p4.x = sb.x0;
1593 p4.y = eb.y1;
1594
1595 if (!stop) {
1596 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1597 pageno, 1,
1598 p1.x, p1.y,
1599 p2.x, p2.y,
1600 p3.x, p3.y,
1601 p4.x, p4.y);
1602
1603 printd ("progress 1 found at %d `%.*s' in %f sec",
1604 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1605 now () - start);
1606 }
1607 else {
1608 printd ("match %d %d %f %f %f %f %f %f %f %f",
1609 pageno, 2,
1610 p1.x, p1.y,
1611 p2.x, p2.y,
1612 p3.x, p3.y,
1613 p4.x, p4.y);
1614 }
1615 free (p);
1616 return 1;
1617 }
1618 }
1619
1620 static int compareblocks (const void *l, const void *r)
1621 {
1622 fz_text_block const *ls = l;
1623 fz_text_block const* rs = r;
1624 return ls->bbox.y0 - rs->bbox.y0;
1625 }
1626
1627 /* wishful thinking function */
1628 static void search (regex_t *re, int pageno, int y, int forward)
1629 {
1630 int i, j;
1631 fz_matrix ctm;
1632 fz_device *tdev;
1633 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1634 fz_text_page *text;
1635 fz_text_sheet *sheet;
1636 struct pagedim *pdim, *pdimprev;
1637 int stop = 0, niters = 0;
1638 double start, end;
1639
1640 if (!(state.type == DPDF || state.type == DXPS))
1641 return;
1642
1643 start = now ();
1644 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1645 if (niters++ == 5) {
1646 niters = 0;
1647 if (hasdata ()) {
1648 printd ("progress 1 attention requested aborting search at %d",
1649 pageno);
1650 stop = 1;
1651 }
1652 else {
1653 printd ("progress %f searching in page %d",
1654 (double) (pageno + 1) / state.pagecount,
1655 pageno);
1656 }
1657 }
1658 pdimprev = NULL;
1659 for (i = 0; i < state.pagedimcount; ++i) {
1660 pdim = &state.pagedims[i];
1661 if (pdim->pageno == pageno) {
1662 goto found;
1663 }
1664 if (pdim->pageno > pageno) {
1665 pdim = pdimprev;
1666 goto found;
1667 }
1668 pdimprev = pdim;
1669 }
1670 pdim = pdimprev;
1671 found:
1672
1673 sheet = fz_new_text_sheet (state.ctx);
1674 text = fz_new_text_page (state.ctx);
1675 tdev = fz_new_text_device (state.ctx, sheet, text);
1676
1677 switch (state.type) {
1678 case DPDF:
1679 u.ptr = NULL;
1680 fz_try (state.ctx) {
1681 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1682 trimctm (u.pdfpage, pdim - state.pagedims);
1683 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1684 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1685 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1686 fz_end_page (tdev);
1687 }
1688 fz_catch (state.ctx) {
1689 fz_free_device (tdev);
1690 u.ptr = NULL;
1691 goto nextiter;
1692 }
1693 break;
1694
1695 case DXPS:
1696 u.xpspage = xps_load_page (state.u.xps, pageno);
1697 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1698 break;
1699
1700 default:
1701 ARSERT (0 && state.type);
1702 }
1703
1704 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1705 fz_free_device (tdev);
1706
1707 for (j = 0; j < text->len; ++j) {
1708 int k;
1709 fz_page_block *pb;
1710 fz_text_block *block;
1711
1712 pb = &text->blocks[forward ? j : text->len - 1 - j];
1713 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1714 block = pb->u.text;
1715
1716 for (k = 0; k < block->len; ++k) {
1717 fz_text_line *line;
1718 fz_text_span *span;
1719
1720 if (forward) {
1721 line = &block->lines[k];
1722 if (line->bbox.y0 < y + 1) continue;
1723 }
1724 else {
1725 line = &block->lines[block->len - 1 - k];
1726 if (line->bbox.y0 > y - 1) continue;
1727 }
1728
1729 for (span = line->first_span; span; span = span->next) {
1730 switch (matchspan (re, text, span, ctm,
1731 stop, pageno, start)) {
1732 case 0: break;
1733 case 1: stop = 1; break;
1734 case -1: stop = 1; goto endloop;
1735 }
1736 }
1737 }
1738 }
1739 nextiter:
1740 if (forward) {
1741 pageno += 1;
1742 y = 0;
1743 }
1744 else {
1745 pageno -= 1;
1746 y = INT_MAX;
1747 }
1748 endloop:
1749 fz_free_text_page (state.ctx, text);
1750 fz_free_text_sheet (state.ctx, sheet);
1751 if (u.ptr) {
1752 state.freepage (u.ptr);
1753 }
1754 }
1755 end = now ();
1756 if (!stop) {
1757 printd ("progress 1 no matches %f sec", end - start);
1758 }
1759 printd ("clearrects");
1760 }
1761
1762 static void set_tex_params (int colorspace)
1763 {
1764 union {
1765 unsigned char b;
1766 unsigned int s;
1767 } endianness = {1};
1768
1769 switch (colorspace) {
1770 case 0:
1771 state.texiform = GL_RGBA8;
1772 state.texform = GL_RGBA;
1773 state.texty = GL_UNSIGNED_BYTE;
1774 state.colorspace = fz_device_rgb (state.ctx);
1775 break;
1776 case 1:
1777 state.texiform = GL_RGBA8;
1778 state.texform = GL_BGRA;
1779 state.texty = endianness.s > 1
1780 ? GL_UNSIGNED_INT_8_8_8_8
1781 : GL_UNSIGNED_INT_8_8_8_8_REV;
1782 state.colorspace = fz_device_bgr (state.ctx);
1783 break;
1784 case 2:
1785 state.texiform = GL_LUMINANCE_ALPHA;
1786 state.texform = GL_LUMINANCE_ALPHA;
1787 state.texty = GL_UNSIGNED_BYTE;
1788 state.colorspace = fz_device_gray (state.ctx);
1789 break;
1790 default:
1791 errx (1, "invalid colorspce %d", colorspace);
1792 }
1793 }
1794
1795 static void realloctexts (int texcount)
1796 {
1797 size_t size;
1798
1799 if (texcount == state.texcount) return;
1800
1801 if (texcount < state.texcount) {
1802 glDeleteTextures (state.texcount - texcount,
1803 state.texids + texcount);
1804 }
1805
1806 size = texcount * sizeof (*state.texids);
1807 state.texids = realloc (state.texids, size);
1808 if (!state.texids) {
1809 err (1, "realloc texids %" FMT_s, size);
1810 }
1811
1812 size = texcount * sizeof (*state.texowners);
1813 state.texowners = realloc (state.texowners, size);
1814 if (!state.texowners) {
1815 err (1, "realloc texowners %" FMT_s, size);
1816 }
1817 if (texcount > state.texcount) {
1818 int i;
1819
1820 glGenTextures (texcount - state.texcount,
1821 state.texids + state.texcount);
1822 for (i = state.texcount; i < texcount; ++i) {
1823 state.texowners[i].w = -1;
1824 state.texowners[i].slice = NULL;
1825 }
1826 }
1827 state.texcount = texcount;
1828 state.texindex = 0;
1829 }
1830
1831 static char *mbtoutf8 (char *s)
1832 {
1833 char *p, *r;
1834 wchar_t *tmp;
1835 size_t i, ret, len;
1836
1837 len = mbstowcs (NULL, s, strlen (s));
1838 if (len == 0) {
1839 return s;
1840 }
1841 else {
1842 if (len == (size_t) -1) {
1843 return s;
1844 }
1845 }
1846
1847 tmp = malloc (len * sizeof (wchar_t));
1848 if (!tmp) {
1849 return s;
1850 }
1851
1852 ret = mbstowcs (tmp, s, len);
1853 if (ret == (size_t) -1) {
1854 free (tmp);
1855 return s;
1856 }
1857
1858 len = 0;
1859 for (i = 0; i < ret; ++i) {
1860 len += fz_runelen (tmp[i]);
1861 }
1862
1863 p = r = malloc (len + 1);
1864 if (!r) {
1865 free (tmp);
1866 return s;
1867 }
1868
1869 for (i = 0; i < ret; ++i) {
1870 p += fz_runetochar (p, tmp[i]);
1871 }
1872 *p = 0;
1873 free (tmp);
1874 return r;
1875 }
1876
1877 CAMLprim value ml_mbtoutf8 (value s_v)
1878 {
1879 CAMLparam1 (s_v);
1880 CAMLlocal1 (ret_v);
1881 char *s, *r;
1882
1883 s = String_val (s_v);
1884 r = mbtoutf8 (s);
1885 if (r == s) {
1886 ret_v = s_v;
1887 }
1888 else {
1889 ret_v = caml_copy_string (r);
1890 free (r);
1891 }
1892 CAMLreturn (ret_v);
1893 }
1894
1895 static void * mainloop (void *unused)
1896 {
1897 char *p = NULL;
1898 int len, ret, oldlen = 0;
1899
1900 for (;;) {
1901 len = readlen ();
1902 if (len == 0) {
1903 errx (1, "readlen returned 0");
1904 }
1905
1906 if (oldlen < len + 1) {
1907 p = realloc (p, len + 1);
1908 if (!p) {
1909 err (1, "realloc %d failed", len + 1);
1910 }
1911 oldlen = len + 1;
1912 }
1913 readdata (p, len);
1914 p[len] = 0;
1915
1916 if (!strncmp ("open", p, 4)) {
1917 int wthack, off, ok = 0;
1918 char *password;
1919 char *filename;
1920 char *utf8filename;
1921 size_t filenamelen;
1922
1923 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1924 if (ret != 2) {
1925 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1926 }
1927
1928 filename = p + 5 + off;
1929 filenamelen = strlen (filename);
1930 password = filename + filenamelen + 1;
1931
1932 lock ("open");
1933 fz_try (state.ctx) {
1934 openxref (filename, password);
1935 ok = 1;
1936 }
1937 fz_catch (state.ctx) {
1938 utf8filename = mbtoutf8 (filename);
1939 printd ("msg Could not open %s", utf8filename);
1940 }
1941 if (ok) {
1942 pdfinfo ();
1943 initpdims ();
1944 }
1945 unlock ("open");
1946
1947 if (ok) {
1948 if (!wthack) {
1949 utf8filename = mbtoutf8 (filename);
1950 printd ("msg Opened %s (press h/F1 to get help)",
1951 utf8filename);
1952 if (utf8filename != filename) {
1953 free (utf8filename);
1954 }
1955 }
1956 state.needoutline = 1;
1957 }
1958 }
1959 else if (!strncmp ("cs", p, 2)) {
1960 int i, colorspace;
1961
1962 ret = sscanf (p + 2, " %d", &colorspace);
1963 if (ret != 1) {
1964 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1965 }
1966 lock ("cs");
1967 set_tex_params (colorspace);
1968 for (i = 0; i < state.texcount; ++i) {
1969 state.texowners[i].w = -1;
1970 state.texowners[i].slice = NULL;
1971 }
1972 unlock ("cs");
1973 }
1974 else if (!strncmp ("freepage", p, 8)) {
1975 void *ptr;
1976
1977 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1978 if (ret != 1) {
1979 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1980 }
1981 freepage (ptr);
1982 }
1983 else if (!strncmp ("freetile", p, 8)) {
1984 void *ptr;
1985
1986 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1987 if (ret != 1) {
1988 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1989 }
1990 freetile (ptr);
1991 }
1992 else if (!strncmp ("search", p, 6)) {
1993 int icase, pageno, y, ret, len2, forward;
1994 char *pattern;
1995 regex_t re;
1996
1997 ret = sscanf (p + 6, " %d %d %d %d,%n",
1998 &icase, &pageno, &y, &forward, &len2);
1999 if (ret != 4) {
2000 errx (1, "malformed search `%s' ret=%d", p, ret);
2001 }
2002
2003 pattern = p + 6 + len2;
2004 ret = regcomp (&re, pattern,
2005 REG_EXTENDED | (icase ? REG_ICASE : 0));
2006 if (ret) {
2007 char errbuf[80];
2008 size_t size;
2009
2010 size = regerror (ret, &re, errbuf, sizeof (errbuf));
2011 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
2012 }
2013 else {
2014 search (&re, pageno, y, forward);
2015 regfree (&re);
2016 }
2017 }
2018 else if (!strncmp ("geometry", p, 8)) {
2019 int w, h, fitmodel;
2020
2021 printd ("clear");
2022 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
2023 if (ret != 3) {
2024 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
2025 }
2026
2027 lock ("geometry");
2028 state.h = h;
2029 if (w != state.w) {
2030 int i;
2031 state.w = w;
2032 for (i = 0; i < state.texcount; ++i) {
2033 state.texowners[i].slice = NULL;
2034 }
2035 }
2036 state.fitmodel = fitmodel;
2037 layout ();
2038 process_outline ();
2039
2040 state.gen++;
2041 unlock ("geometry");
2042 printd ("continue %d", state.pagecount);
2043 }
2044 else if (!strncmp ("reqlayout", p, 9)) {
2045 char *nameddest;
2046 int rotate, fitmodel, off, h;
2047
2048 printd ("clear");
2049 ret = sscanf (p + 9, " %d %d %d %n",
2050 &rotate, &fitmodel, &h, &off);
2051 if (ret != 3) {
2052 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
2053 }
2054 lock ("reqlayout");
2055 if (state.rotate != rotate || state.fitmodel != fitmodel) {
2056 state.gen += 1;
2057 }
2058 state.rotate = rotate;
2059 state.fitmodel = fitmodel;
2060 state.h = h;
2061 layout ();
2062 process_outline ();
2063
2064 nameddest = p + 9 + off;
2065 if (state.type == DPDF && nameddest && *nameddest) {
2066 struct anchor a;
2067 fz_link_dest dest;
2068 pdf_obj *needle, *obj;
2069
2070 needle = pdf_new_string (state.u.pdf, nameddest,
2071 strlen (nameddest));
2072 obj = pdf_lookup_dest (state.u.pdf, needle);
2073 if (obj) {
2074 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
2075
2076 a = desttoanchor (&dest);
2077 if (a.n >= 0) {
2078 printd ("a %d %d %d", a.n, a.x, a.y);
2079 }
2080 else {
2081 printd ("emsg failed to parse destination `%s'\n",
2082 nameddest);
2083 }
2084 }
2085 else {
2086 printd ("emsg destination `%s' not found\n",
2087 nameddest);
2088 }
2089 pdf_drop_obj (needle);
2090 }
2091
2092 state.gen++;
2093 unlock ("reqlayout");
2094 printd ("continue %d", state.pagecount);
2095 }
2096 else if (!strncmp ("page", p, 4)) {
2097 double a, b;
2098 struct page *page;
2099 int pageno, pindex, ret;
2100
2101 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
2102 if (ret != 2) {
2103 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
2104 }
2105
2106 lock ("page");
2107 a = now ();
2108 page = loadpage (pageno, pindex);
2109 b = now ();
2110 unlock ("page");
2111
2112 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
2113 }
2114 else if (!strncmp ("tile", p, 4)) {
2115 int x, y, w, h, ret;
2116 struct page *page;
2117 struct tile *tile;
2118 double a, b;
2119 void *data;
2120
2121 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d %" FMT_ptr,
2122 FMT_ptr_cast (&page), &x, &y, &w, &h, &data);
2123 if (ret != 6) {
2124 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2125 }
2126
2127 lock ("tile");
2128 a = now ();
2129 tile = rendertile (page, x, y, w, h, data);
2130 b = now ();
2131 unlock ("tile");
2132
2133 printd ("tile %d %d %" FMT_ptr " %u %f",
2134 x, y,
2135 FMT_ptr_cast2 (tile),
2136 tile->w * tile->h * tile->pixmap->n,
2137 b - a);
2138 }
2139 else if (!strncmp ("settrim", p, 7)) {
2140 fz_irect fuzz;
2141 int trimmargins;
2142
2143 ret = sscanf (p + 7, " %d %d %d %d %d",
2144 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2145 if (ret != 5) {
2146 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2147 }
2148 printd ("clear");
2149 lock ("settrim");
2150 state.trimmargins = trimmargins;
2151 state.needoutline = 1;
2152 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2153 state.trimanew = 1;
2154 state.trimfuzz = fuzz;
2155 }
2156 state.pagedimcount = 0;
2157 free (state.pagedims);
2158 state.pagedims = NULL;
2159 initpdims ();
2160 layout ();
2161 process_outline ();
2162 unlock ("settrim");
2163 printd ("continue %d", state.pagecount);
2164 }
2165 else if (!strncmp ("sliceh", p, 6)) {
2166 int h;
2167
2168 ret = sscanf (p + 6, " %d", &h);
2169 if (ret != 1) {
2170 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2171 }
2172 if (h != state.sliceheight) {
2173 int i;
2174
2175 state.sliceheight = h;
2176 for (i = 0; i < state.texcount; ++i) {
2177 state.texowners[i].w = -1;
2178 state.texowners[i].h = -1;
2179 state.texowners[i].slice = NULL;
2180 }
2181 }
2182 }
2183 else if (!strncmp ("interrupt", p, 9)) {
2184 printd ("vmsg interrupted");
2185 }
2186 else {
2187 errx (1, "unknown command %.*s", len, p);
2188 }
2189 }
2190 return 0;
2191 }
2192
2193 CAMLprim value ml_realloctexts (value texcount_v)
2194 {
2195 CAMLparam1 (texcount_v);
2196 int ok;
2197
2198 if (trylock ("ml_realloctexts")) {
2199 ok = 0;
2200 goto done;
2201 }
2202 realloctexts (Int_val (texcount_v));
2203 ok = 1;
2204 unlock ("ml_realloctexts");
2205
2206 done:
2207 CAMLreturn (Val_bool (ok));
2208 }
2209
2210 static void recti (int x0, int y0, int x1, int y1)
2211 {
2212 GLfloat *v = state.vertices;
2213
2214 glVertexPointer (2, GL_FLOAT, 0, v);
2215 v[0] = x0; v[1] = y0;
2216 v[2] = x1; v[3] = y0;
2217 v[4] = x0; v[5] = y1;
2218 v[6] = x1; v[7] = y1;
2219 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2220 }
2221
2222 static void showsel (struct page *page, int ox, int oy)
2223 {
2224 int seen = 0;
2225 fz_irect bbox;
2226 fz_rect rect;
2227 fz_text_line *line;
2228 fz_page_block *pageb;
2229 fz_text_block *block;
2230 struct mark first, last;
2231 unsigned char selcolor[] = {15,15,15,140};
2232
2233 first = page->fmark;
2234 last = page->lmark;
2235
2236 if (!first.span || !last.span) return;
2237
2238 glEnable (GL_BLEND);
2239 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2240 glColor4ubv (selcolor);
2241
2242 ox += state.pagedims[page->pdimno].bounds.x0;
2243 oy += state.pagedims[page->pdimno].bounds.y0;
2244 for (pageb = page->text->blocks;
2245 pageb < page->text->blocks + page->text->len;
2246 ++pageb) {
2247 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2248 block = pageb->u.text;
2249
2250 for (line = block->lines;
2251 line < block->lines + block->len;
2252 ++line) {
2253 fz_text_span *span;
2254 rect = fz_empty_rect;
2255
2256 for (span = line->first_span; span; span = span->next) {
2257 int i, j, k;
2258 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2259
2260 j = 0;
2261 k = span->len - 1;
2262
2263 if (span == page->fmark.span && span == page->lmark.span) {
2264 seen = 1;
2265 j = MIN (first.i, last.i);
2266 k = MAX (first.i, last.i);
2267 }
2268 else {
2269 if (span == first.span) {
2270 seen = 1;
2271 j = first.i;
2272 }
2273 else if (span == last.span) {
2274 seen = 1;
2275 k = last.i;
2276 }
2277 }
2278
2279 if (seen) {
2280 for (i = j; i <= k; ++i) {
2281 fz_rect bbox;
2282 fz_union_rect (&rect,
2283 fz_text_char_bbox (&bbox, span, i));
2284 }
2285 fz_round_rect (&bbox, &rect);
2286 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2287 bbox.x0,
2288 bbox.y0,
2289 bbox.x1,
2290 bbox.y1,
2291 oy, ox);
2292
2293 recti (bbox.x0 + ox, bbox.y0 + oy,
2294 bbox.x1 + ox, bbox.y1 + oy);
2295 if (span == last.span) {
2296 goto done;
2297 }
2298 rect = fz_empty_rect;
2299 }
2300 }
2301 }
2302 }
2303 done:
2304 glDisable (GL_BLEND);
2305 }
2306
2307 #include "glfont.c"
2308
2309 static void highlightlinks (struct page *page, int xoff, int yoff)
2310 {
2311 fz_matrix ctm, tm, pm;
2312 fz_link *link, *links;
2313 GLfloat *texcoords = state.texcoords;
2314 GLfloat *vertices = state.vertices;
2315
2316 switch (page->type) {
2317 case DPDF:
2318 links = page->u.pdfpage->links;
2319 break;
2320
2321 case DXPS:
2322 links = page->u.xpspage->links;
2323 break;
2324
2325 default:
2326 return;
2327 }
2328
2329 glEnable (GL_TEXTURE_1D);
2330 glEnable (GL_BLEND);
2331 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2332 glBindTexture (GL_TEXTURE_1D, state.stid);
2333
2334 xoff -= state.pagedims[page->pdimno].bounds.x0;
2335 yoff -= state.pagedims[page->pdimno].bounds.y0;
2336 fz_translate (&tm, xoff, yoff);
2337 pm = pagectm (page);
2338 fz_concat (&ctm, &pm, &tm);
2339
2340 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2341 glVertexPointer (2, GL_FLOAT, 0, vertices);
2342
2343 for (link = links; link; link = link->next) {
2344 fz_point p1, p2, p3, p4;
2345
2346 p1.x = link->rect.x0;
2347 p1.y = link->rect.y0;
2348
2349 p2.x = link->rect.x1;
2350 p2.y = link->rect.y0;
2351
2352 p3.x = link->rect.x1;
2353 p3.y = link->rect.y1;
2354
2355 p4.x = link->rect.x0;
2356 p4.y = link->rect.y1;
2357
2358 fz_transform_point (&p1, &ctm);
2359 fz_transform_point (&p2, &ctm);
2360 fz_transform_point (&p3, &ctm);
2361 fz_transform_point (&p4, &ctm);
2362
2363 switch (link->dest.kind) {
2364 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2365 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2366 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2367 default: glColor3ub (0, 0, 0); break;
2368 }
2369
2370 {
2371 float w, h, s, t;
2372
2373 w = p2.x - p1.x;
2374 h = p2.y - p1.y;
2375 t = sqrtf (w*w + h*h) * .25f;
2376
2377 w = p3.x - p2.x;
2378 h = p3.y - p2.y;
2379 s = sqrtf (w*w + h*h) * .25f;
2380
2381 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2382 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2383
2384 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2385 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2386
2387 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2388 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2389
2390 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2391 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2392 }
2393 glDrawArrays (GL_LINES, 0, 8);
2394 }
2395
2396 glDisable (GL_BLEND);
2397 glDisable (GL_TEXTURE_1D);
2398 }
2399
2400 static int compareslinks (const void *l, const void *r)
2401 {
2402 struct slink const *ls = l;
2403 struct slink const *rs = r;
2404 if (ls->bbox.y0 == rs->bbox.y0) {
2405 return rs->bbox.x0 - rs->bbox.x0;
2406 }
2407 return ls->bbox.y0 - rs->bbox.y0;
2408 }
2409
2410 static void droptext (struct page *page)
2411 {
2412 if (page->text) {
2413 fz_free_text_page (state.ctx, page->text);
2414 page->fmark.i = -1;
2415 page->lmark.i = -1;
2416 page->fmark.span = NULL;
2417 page->lmark.span = NULL;
2418 page->text = NULL;
2419 }
2420 if (page->sheet) {
2421 fz_free_text_sheet (state.ctx, page->sheet);
2422 page->sheet = NULL;
2423 }
2424 }
2425
2426 static void dropslinks (struct page *page)
2427 {
2428 if (page->slinks) {
2429 free (page->slinks);
2430 page->slinks = NULL;
2431 page->slinkcount = 0;
2432 }
2433 }
2434
2435 static void ensureslinks (struct page *page)
2436 {
2437 fz_matrix ctm;
2438 int i, count = 0;
2439 size_t slinksize = sizeof (*page->slinks);
2440 fz_link *link, *links;
2441
2442 if (state.gen != page->sgen) {
2443 dropslinks (page);
2444 page->sgen = state.gen;
2445 }
2446 if (page->slinks) return;
2447
2448 switch (page->type) {
2449 case DPDF:
2450 links = page->u.pdfpage->links;
2451 trimctm (page->u.pdfpage, page->pdimno);
2452 fz_concat (&ctm,
2453 &state.pagedims[page->pdimno].tctm,
2454 &state.pagedims[page->pdimno].ctm);
2455 break;
2456
2457 case DXPS:
2458 links = page->u.xpspage->links;
2459 ctm = state.pagedims[page->pdimno].ctm;
2460 break;
2461
2462 default:
2463 return;
2464 }
2465
2466 for (link = links; link; link = link->next) {
2467 count++;
2468 }
2469 if (count > 0) {
2470 page->slinkcount = count;
2471 page->slinks = calloc (count, slinksize);
2472 if (!page->slinks) {
2473 err (1, "realloc slinks %d", count);
2474 }
2475
2476 for (i = 0, link = links; link; ++i, link = link->next) {
2477 fz_rect rect;
2478
2479 rect = link->rect;
2480 fz_transform_rect (&rect, &ctm);
2481 page->slinks[i].link = link;
2482 fz_round_rect (&page->slinks[i].bbox, &rect);
2483 }
2484 qsort (page->slinks, count, slinksize, compareslinks);
2485 }
2486 }
2487
2488 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2489 static void fmt_linkn (char *s, unsigned int u)
2490 {
2491 unsigned int len; unsigned int q;
2492 int zma = 'z' - 'a' + 1;
2493 len = 1; q = u;
2494 while (q > zma - 1) { ++len; q /= zma; }
2495 if (s) {
2496 s += len;
2497 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2498 /* handles u == 0 */
2499 }
2500 s[len] = 0;
2501 }
2502
2503 static void highlightslinks (struct page *page, int xoff, int yoff,
2504 int noff, char *targ, int tlen, int hfsize)
2505 {
2506 int i;
2507 char buf[40];
2508 struct slink *slink;
2509 double x0, y0, x1, y1, w;
2510
2511 ensureslinks (page);
2512 glColor3ub (0xc3, 0xb0, 0x91);
2513 for (i = 0; i < page->slinkcount; ++i) {
2514 fmt_linkn (buf, i + noff);
2515 if (!tlen || !strncmp (targ, buf, tlen)) {
2516 slink = &page->slinks[i];
2517
2518 x0 = slink->bbox.x0 + xoff - 5;
2519 y1 = slink->bbox.y0 + yoff - 5;
2520 y0 = y1 + 10 + hfsize;
2521 w = measure_string (state.face, hfsize, buf);
2522 x1 = x0 + w + 10;
2523 recti (x0, y0, x1, y1);
2524 }
2525 }
2526
2527 glEnable (GL_BLEND);
2528 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2529 glEnable (GL_TEXTURE_2D);
2530 glColor3ub (0, 0, 0);
2531 for (i = 0; i < page->slinkcount; ++i) {
2532 fmt_linkn (buf, i + noff);
2533 if (!tlen || !strncmp (targ, buf, tlen)) {
2534 slink = &page->slinks[i];
2535
2536 x0 = slink->bbox.x0 + xoff;
2537 y0 = slink->bbox.y0 + yoff + hfsize;
2538 draw_string (state.face, hfsize, x0, y0, buf);
2539 }
2540 }
2541 glDisable (GL_TEXTURE_2D);
2542 glDisable (GL_BLEND);
2543 }
2544
2545 static void uploadslice (struct tile *tile, struct slice *slice)
2546 {
2547 int offset;
2548 struct slice *slice1;
2549 unsigned char *texdata;
2550
2551 offset = 0;
2552 for (slice1 = tile->slices; slice != slice1; slice1++) {
2553 offset += slice1->h * tile->w * tile->pixmap->n;
2554 }
2555 if (slice->texindex != -1 && slice->texindex < state.texcount
2556 && state.texowners[slice->texindex].slice == slice) {
2557 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2558 }
2559 else {
2560 int subimage = 0;
2561 int texindex = state.texindex++ % state.texcount;
2562
2563 if (state.texowners[texindex].w == tile->w) {
2564 if (state.texowners[texindex].h >= slice->h) {
2565 subimage = 1;
2566 }
2567 else {
2568 state.texowners[texindex].h = slice->h;
2569 }
2570 }
2571 else {
2572 state.texowners[texindex].h = slice->h;
2573 }
2574
2575 state.texowners[texindex].w = tile->w;
2576 state.texowners[texindex].slice = slice;
2577 slice->texindex = texindex;
2578
2579 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2580 if (tile->pbo) {
2581 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2582 texdata = 0;
2583 }
2584 else {
2585 texdata = tile->pixmap->samples;
2586 }
2587 if (subimage) {
2588 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2589 0,
2590 0,
2591 0,
2592 tile->w,
2593 slice->h,
2594 state.texform,
2595 state.texty,
2596 texdata+offset
2597 );
2598 }
2599 else {
2600 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2601 0,
2602 state.texiform,
2603 tile->w,
2604 slice->h,
2605 0,
2606 state.texform,
2607 state.texty,
2608 texdata+offset
2609 );
2610 }
2611 if (tile->pbo) {
2612 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2613 }
2614 }
2615 }
2616
2617 CAMLprim value ml_begintiles (value unit_v)
2618 {
2619 CAMLparam1 (unit_v);
2620 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2621 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2622 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2623 CAMLreturn (unit_v);
2624 }
2625
2626 CAMLprim value ml_endtiles (value unit_v)
2627 {
2628 CAMLparam1 (unit_v);
2629 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2630 CAMLreturn (unit_v);
2631 }
2632
2633 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2634 {
2635 CAMLparam2 (args_v, ptr_v);
2636 int dispx = Int_val (Field (args_v, 0));
2637 int dispy = Int_val (Field (args_v, 1));
2638 int dispw = Int_val (Field (args_v, 2));
2639 int disph = Int_val (Field (args_v, 3));
2640 int tilex = Int_val (Field (args_v, 4));
2641 int tiley = Int_val (Field (args_v, 5));
2642 char *s = String_val (ptr_v);
2643 struct tile *tile = parse_pointer ("ml_drawtile", s);
2644 int slicey, firstslice;
2645 struct slice *slice;
2646 GLfloat *texcoords = state.texcoords;
2647 GLfloat *vertices = state.vertices;
2648
2649 firstslice = tiley / tile->sliceheight;
2650 slice = &tile->slices[firstslice];
2651 slicey = tiley % tile->sliceheight;
2652
2653 while (disph > 0) {
2654 int dh;
2655
2656 dh = slice->h - slicey;
2657 dh = MIN (disph, dh);
2658 uploadslice (tile, slice);
2659
2660 texcoords[0] = tilex; texcoords[1] = slicey;
2661 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2662 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2663 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2664
2665 vertices[0] = dispx; vertices[1] = dispy;
2666 vertices[2] = dispx+dispw; vertices[3] = dispy;
2667 vertices[4] = dispx; vertices[5] = dispy+dh;
2668 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2669
2670 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2671 dispy += dh;
2672 disph -= dh;
2673 slice++;
2674 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2675 slicey = 0;
2676 }
2677 CAMLreturn (Val_unit);
2678 }
2679
2680 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2681 value xoff_v, value yoff_v,
2682 value li_v)
2683 {
2684 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2685 int xoff = Int_val (xoff_v);
2686 int yoff = Int_val (yoff_v);
2687 int noff = Int_val (Field (li_v, 0));
2688 char *targ = String_val (Field (li_v, 1));
2689 int tlen = caml_string_length (Field (li_v, 1));
2690 int hfsize = Int_val (Field (li_v, 2));
2691 char *s = String_val (ptr_v);
2692 int hlmask = Int_val (hlinks_v);
2693 struct page *page = parse_pointer ("ml_postprocess", s);
2694
2695 if (!page->u.ptr) {
2696 /* deal with loadpage failed pages */
2697 goto done;
2698 }
2699
2700 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2701 if (trylock ("ml_postprocess")) {
2702 noff = 0;
2703 goto done;
2704 }
2705 if (hlmask & 2) {
2706 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2707 noff = page->slinkcount;
2708 }
2709 if (page->tgen == state.gen) {
2710 showsel (page, xoff, yoff);
2711 }
2712 unlock ("ml_postprocess");
2713
2714 done:
2715 CAMLreturn (Val_int (noff));
2716 }
2717
2718 static fz_link *getlink (struct page *page, int x, int y)
2719 {
2720 fz_point p;
2721 fz_matrix ctm;
2722 const fz_matrix *tctm;
2723 fz_link *link, *links;
2724
2725 switch (page->type) {
2726 case DPDF:
2727 trimctm (page->u.pdfpage, page->pdimno);
2728 tctm = &state.pagedims[page->pdimno].tctm;
2729 links = page->u.pdfpage->links;
2730 break;
2731
2732 case DXPS:
2733 tctm = &fz_identity;
2734 links = page->u.xpspage->links;
2735 break;
2736
2737 default:
2738 return NULL;
2739 }
2740 p.x = x;
2741 p.y = y;
2742
2743 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2744 fz_invert_matrix (&ctm, &ctm);
2745 fz_transform_point (&p, &ctm);
2746
2747 for (link = links; link; link = link->next) {
2748 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2749 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2750 return link;
2751 }
2752 }
2753 }
2754 return NULL;
2755 }
2756
2757 static void ensuretext (struct page *page)
2758 {
2759 if (state.gen != page->tgen) {
2760 droptext (page);
2761 page->tgen = state.gen;
2762 }
2763 if (!page->text) {
2764 fz_matrix ctm;
2765 fz_device *tdev;
2766
2767 page->text = fz_new_text_page (state.ctx);
2768 page->sheet = fz_new_text_sheet (state.ctx);
2769 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2770 ctm = pagectm (page);
2771 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2772 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2773 qsort (page->text->blocks, page->text->len,
2774 sizeof (*page->text->blocks), compareblocks);
2775 fz_end_page (tdev);
2776 fz_free_device (tdev);
2777 }
2778 }
2779
2780 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2781 {
2782 CAMLparam2 (start_page_v, dir_v);
2783 CAMLlocal1 (ret_v);
2784 int i, dir = Int_val (dir_v);
2785 int start_page = Int_val (start_page_v);
2786 int end_page = dir > 0 ? state.pagecount : -1;
2787
2788 ret_v = Val_int (0);
2789 if (!(state.type == DPDF || state.type == DXPS)) {
2790 goto done;
2791 }
2792
2793 lock ("ml_findpage_with_links");
2794 for (i = start_page + dir; i != end_page; i += dir) {
2795 int found;
2796
2797 switch (state.type) {
2798 case DPDF:
2799 {
2800 pdf_page *page = NULL;
2801
2802 fz_try (state.ctx) {
2803 page = pdf_load_page (state.u.pdf, i);
2804 found = !!page->links;
2805 }
2806 fz_catch (state.ctx) {
2807 found = 0;
2808 }
2809 if (page) {
2810 freepdfpage (page);
2811 }
2812 }
2813 break;
2814 case DXPS:
2815 {
2816 xps_page *page = xps_load_page (state.u.xps, i);
2817 found = !!page->links;
2818 freexpspage (page);
2819 }
2820 break;
2821
2822 default:
2823 ARSERT (0 && "invalid document type");
2824 }
2825
2826 if (found) {
2827 ret_v = caml_alloc_small (1, 1);
2828 Field (ret_v, 0) = Val_int (i);
2829 goto unlock;
2830 }
2831 }
2832 unlock:
2833 unlock ("ml_findpage_with_links");
2834
2835 done:
2836 CAMLreturn (ret_v);
2837 }
2838
2839 enum { dir_first, dir_last };
2840 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2841
2842 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2843 {
2844 CAMLparam2 (ptr_v, dir_v);
2845 CAMLlocal2 (ret_v, pos_v);
2846 struct page *page;
2847 int dirtag, i, slinkindex;
2848 struct slink *found = NULL ,*slink;
2849 char *s = String_val (ptr_v);
2850
2851 page = parse_pointer ("ml_findlink", s);
2852 ret_v = Val_int (0);
2853 if (trylock ("ml_findlink")) {
2854 goto done;
2855 }
2856
2857 ensureslinks (page);
2858
2859 if (Is_block (dir_v)) {
2860 dirtag = Tag_val (dir_v);
2861 switch (dirtag) {
2862 case dir_first_visible:
2863 {
2864 int x0, y0, dir, first_index, last_index;
2865
2866 pos_v = Field (dir_v, 0);
2867 x0 = Int_val (Field (pos_v, 0));
2868 y0 = Int_val (Field (pos_v, 1));
2869 dir = Int_val (Field (pos_v, 2));
2870
2871 if (dir >= 0) {
2872 dir = 1;
2873 first_index = 0;
2874 last_index = page->slinkcount;
2875 }
2876 else {
2877 first_index = page->slinkcount - 1;
2878 last_index = -1;
2879 }
2880
2881 for (i = first_index; i != last_index; i += dir) {
2882 slink = &page->slinks[i];
2883 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2884 found = slink;
2885 break;
2886 }
2887 }
2888 }
2889 break;
2890
2891 case dir_left:
2892 slinkindex = Int_val (Field (dir_v, 0));
2893 found = &page->slinks[slinkindex];
2894 for (i = slinkindex - 1; i >= 0; --i) {
2895 slink = &page->slinks[i];
2896 if (slink->bbox.x0 < found->bbox.x0) {
2897 found = slink;
2898 break;
2899 }
2900 }
2901 break;
2902
2903 case dir_right:
2904 slinkindex = Int_val (Field (dir_v, 0));
2905 found = &page->slinks[slinkindex];
2906 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2907 slink = &page->slinks[i];
2908 if (slink->bbox.x0 > found->bbox.x0) {
2909 found = slink;
2910 break;
2911 }
2912 }
2913 break;
2914
2915 case dir_down:
2916 slinkindex = Int_val (Field (dir_v, 0));
2917 found = &page->slinks[slinkindex];
2918 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2919 slink = &page->slinks[i];
2920 if (slink->bbox.y0 >= found->bbox.y0) {
2921 found = slink;
2922 break;
2923 }
2924 }
2925 break;
2926
2927 case dir_up:
2928 slinkindex = Int_val (Field (dir_v, 0));
2929 found = &page->slinks[slinkindex];
2930 for (i = slinkindex - 1; i >= 0; --i) {
2931 slink = &page->slinks[i];
2932 if (slink->bbox.y0 <= found->bbox.y0) {
2933 found = slink;
2934 break;
2935 }
2936 }
2937 break;
2938 }
2939 }
2940 else {
2941 dirtag = Int_val (dir_v);
2942 switch (dirtag) {
2943 case dir_first:
2944 found = page->slinks;
2945 break;
2946
2947 case dir_last:
2948 if (page->slinks) {
2949 found = page->slinks + (page->slinkcount - 1);
2950 }
2951 break;
2952 }
2953 }
2954 if (found) {
2955 ret_v = caml_alloc_small (2, 1);
2956 Field (ret_v, 0) = Val_int (found - page->slinks);
2957 }
2958
2959 unlock ("ml_findlink");
2960 done:
2961 CAMLreturn (ret_v);
2962 }
2963
2964 enum { uuri, ugoto, utext, uunexpected,
2965 ulaunch, unamed, uremote, uremotedest };
2966
2967 #define LINKTOVAL \
2968 { \
2969 int pageno; \
2970 \
2971 switch (link->dest.kind) { \
2972 case FZ_LINK_GOTO: \
2973 { \
2974 fz_point p; \
2975 \
2976 pageno = link->dest.ld.gotor.page; \
2977 p.x = 0; \
2978 p.y = 0; \
2979 \
2980 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2981 p.y = link->dest.ld.gotor.lt.y; \
2982 fz_transform_point (&p, &pdim->lctm); \
2983 } \
2984 tup_v = caml_alloc_tuple (2); \
2985 ret_v = caml_alloc_small (1, ugoto); \
2986 Field (tup_v, 0) = Val_int (pageno); \
2987 Field (tup_v, 1) = Val_int (p.y); \
2988 Field (ret_v, 0) = tup_v; \
2989 } \
2990 break; \
2991 \
2992 case FZ_LINK_URI: \
2993 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2994 ret_v = caml_alloc_small (1, uuri); \
2995 Field (ret_v, 0) = str_v; \
2996 break; \
2997 \
2998 case FZ_LINK_LAUNCH: \
2999 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
3000 ret_v = caml_alloc_small (1, ulaunch); \
3001 Field (ret_v, 0) = str_v; \
3002 break; \
3003 \
3004 case FZ_LINK_NAMED: \
3005 str_v = caml_copy_string (link->dest.ld.named.named); \
3006 ret_v = caml_alloc_small (1, unamed); \
3007 Field (ret_v, 0) = str_v; \
3008 break; \
3009 \
3010 case FZ_LINK_GOTOR: \
3011 { \
3012 int rty; \
3013 \
3014 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
3015 pageno = link->dest.ld.gotor.page; \
3016 if (pageno == -1) { \
3017 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
3018 rty = uremotedest; \
3019 } \
3020 else { \
3021 gr_v = Val_int (pageno); \
3022 rty = uremote; \
3023 } \
3024 tup_v = caml_alloc_tuple (2); \
3025 ret_v = caml_alloc_small (1, rty); \
3026 Field (tup_v, 0) = str_v; \
3027 Field (tup_v, 1) = gr_v; \
3028 Field (ret_v, 0) = tup_v; \
3029 } \
3030 break; \
3031 \
3032 default: \
3033 { \
3034 char buf[80]; \
3035 \
3036 snprintf (buf, sizeof (buf), \
3037 "unhandled link kind %d", link->dest.kind); \
3038 str_v = caml_copy_string (buf); \
3039 ret_v = caml_alloc_small (1, uunexpected); \
3040 Field (ret_v, 0) = str_v; \
3041 } \
3042 break; \
3043 } \
3044 }
3045
3046 CAMLprim value ml_getlink (value ptr_v, value n_v)
3047 {
3048 CAMLparam2 (ptr_v, n_v);
3049 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3050 fz_link *link;
3051 struct page *page;
3052 struct pagedim *pdim;
3053 char *s = String_val (ptr_v);
3054
3055 ret_v = Val_int (0);
3056 if (trylock ("ml_getlink")) {
3057 goto done;
3058 }
3059
3060 page = parse_pointer ("ml_getlink", s);
3061 ensureslinks (page);
3062 pdim = &state.pagedims[page->pdimno];
3063 link = page->slinks[Int_val (n_v)].link;
3064 LINKTOVAL;
3065
3066 unlock ("ml_getlink");
3067 done:
3068 CAMLreturn (ret_v);
3069 }
3070
3071 CAMLprim value ml_getlinkcount (value ptr_v)
3072 {
3073 CAMLparam1 (ptr_v);
3074 struct page *page;
3075 char *s = String_val (ptr_v);
3076
3077 page = parse_pointer ("ml_getlinkcount", s);
3078 CAMLreturn (Val_int (page->slinkcount));
3079 }
3080
3081 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
3082 {
3083 CAMLparam2 (ptr_v, n_v);
3084 CAMLlocal1 (ret_v);
3085 struct page *page;
3086 struct slink *slink;
3087 char *s = String_val (ptr_v);
3088
3089 page = parse_pointer ("ml_getlinkrect", s);
3090 ret_v = caml_alloc_tuple (4);
3091 if (trylock ("ml_getlinkrect")) {
3092 Field (ret_v, 0) = Val_int (0);
3093 Field (ret_v, 1) = Val_int (0);
3094 Field (ret_v, 2) = Val_int (0);
3095 Field (ret_v, 3) = Val_int (0);
3096 goto done;
3097 }
3098 ensureslinks (page);
3099
3100 slink = &page->slinks[Int_val (n_v)];
3101 Field (ret_v, 0) = Val_int (slink->bbox.x0);
3102 Field (ret_v, 1) = Val_int (slink->bbox.y0);
3103 Field (ret_v, 2) = Val_int (slink->bbox.x1);
3104 Field (ret_v, 3) = Val_int (slink->bbox.y1);
3105 unlock ("ml_getlinkrect");
3106
3107 done:
3108 CAMLreturn (ret_v);
3109 }
3110
3111 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3112 {
3113 CAMLparam3 (ptr_v, x_v, y_v);
3114 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3115 fz_link *link;
3116 struct page *page;
3117 char *s = String_val (ptr_v);
3118 int x = Int_val (x_v), y = Int_val (y_v);
3119 struct pagedim *pdim;
3120
3121 ret_v = Val_int (0);
3122 if (trylock ("ml_whatsunder")) {
3123 goto done;
3124 }
3125
3126 page = parse_pointer ("ml_whatsunder", s);
3127 pdim = &state.pagedims[page->pdimno];
3128 x += pdim->bounds.x0;
3129 y += pdim->bounds.y0;
3130 link = getlink (page, x, y);
3131 if (link) {
3132 LINKTOVAL;
3133 }
3134 else {
3135 fz_rect *b;
3136 fz_page_block *pageb;
3137 fz_text_block *block;
3138
3139 ensuretext (page);
3140 for (pageb = page->text->blocks;
3141 pageb < page->text->blocks + page->text->len;
3142 ++pageb) {
3143 fz_text_line *line;
3144 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3145 block = pageb->u.text;
3146
3147 b = &block->bbox;
3148 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3149 continue;
3150
3151 for (line = block->lines;
3152 line < block->lines + block->len;
3153 ++line) {
3154 fz_text_span *span;
3155
3156 b = &line->bbox;
3157 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3158 continue;
3159
3160 for (span = line->first_span; span; span = span->next) {
3161 int charnum;
3162
3163 b = &span->bbox;
3164 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3165 continue;
3166
3167 for (charnum = 0; charnum < span->len; ++charnum) {
3168 fz_rect bbox;
3169 fz_text_char_bbox (&bbox, span, charnum);
3170 b = &bbox;
3171
3172 if (x >= b->x0 && x <= b->x1
3173 && y >= b->y0 && y <= b->y1) {
3174 fz_text_style *style = span->text->style;
3175 const char *n2 =
3176 style->font && style->font->name
3177 ? style->font->name
3178 : "Span has no font name"
3179 ;
3180 FT_FaceRec *face = style->font->ft_face;
3181 if (face && face->family_name) {
3182 char *s;
3183 char *n1 = face->family_name;
3184 size_t l1 = strlen (n1);
3185 size_t l2 = strlen (n2);
3186
3187 if (l1 != l2 || memcmp (n1, n2, l1)) {
3188 s = malloc (l1 + l2 + 2);
3189 if (s) {
3190 memcpy (s, n2, l2);
3191 s[l2] = '=';
3192 memcpy (s + l2 + 1, n1, l1 + 1);
3193 str_v = caml_copy_string (s);
3194 free (s);
3195 }
3196 }
3197 }
3198 if (str_v == 0) {
3199 str_v = caml_copy_string (n2);
3200 }
3201 ret_v = caml_alloc_small (1, utext);
3202 Field (ret_v, 0) = str_v;
3203 goto unlock;
3204 }
3205 }
3206 }
3207 }
3208 }
3209 }
3210 unlock:
3211 unlock ("ml_whatsunder");
3212
3213 done:
3214 CAMLreturn (ret_v);
3215 }
3216
3217 enum { mark_page, mark_block, mark_line, mark_word };
3218
3219 static int uninteresting (int c)
3220 {
3221 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3222 || ispunct (c);
3223 }
3224
3225 CAMLprim value ml_clearmark (value ptr_v)
3226 {
3227 CAMLparam1 (ptr_v);
3228 char *s = String_val (ptr_v);
3229 struct page *page;
3230
3231 if (trylock ("ml_clearmark")) {
3232 goto done;
3233 }
3234
3235 page = parse_pointer ("ml_clearmark", s);
3236 page->fmark.span = NULL;
3237 page->lmark.span = NULL;
3238 page->fmark.i = 0;
3239 page->lmark.i = 0;
3240
3241 unlock ("ml_clearmark");
3242 done:
3243 CAMLreturn (Val_unit);
3244 }
3245
3246 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3247 {
3248 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3249 CAMLlocal1 (ret_v);
3250 fz_rect *b;
3251 struct page *page;
3252 fz_text_line *line;
3253 fz_page_block *pageb;
3254 fz_text_block *block;
3255 struct pagedim *pdim;
3256 int mark = Int_val (mark_v);
3257 char *s = String_val (ptr_v);
3258 int x = Int_val (x_v), y = Int_val (y_v);
3259
3260 ret_v = Val_bool (0);
3261 if (trylock ("ml_markunder")) {
3262 goto done;
3263 }
3264
3265 page = parse_pointer ("ml_markunder", s);
3266 pdim = &state.pagedims[page->pdimno];
3267
3268 ensuretext (page);
3269
3270 if (mark == mark_page) {
3271 int i;
3272 fz_page_block *pb1 = NULL, *pb2 = NULL;
3273
3274 for (i = 0; i < page->text->len; ++i) {
3275 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3276 pb1 = &page->text->blocks[i];
3277 break;
3278 }
3279 }
3280 if (!pb1) goto unlock;
3281
3282 for (i = page->text->len - 1; i >= 0; --i) {
3283 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3284 pb2 = &page->text->blocks[i];
3285 break;
3286 }
3287 }
3288 if (!pb2) goto unlock;
3289
3290 block = pb1->u.text;
3291
3292 page->fmark.i = 0;
3293 page->fmark.span = block->lines->first_span;
3294
3295 block = pb2->u.text;
3296 line = &block->lines[block->len - 1];
3297 page->lmark.i = line->last_span->len - 1;
3298 page->lmark.span = line->last_span;
3299 ret_v = Val_bool (1);
3300 goto unlock;
3301 }
3302
3303 x += pdim->bounds.x0;
3304 y += pdim->bounds.y0;
3305
3306 for (pageb = page->text->blocks;
3307 pageb < page->text->blocks + page->text->len;
3308 ++pageb) {
3309 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3310 block = pageb->u.text;
3311
3312 b = &block->bbox;
3313 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3314 continue;
3315
3316 if (mark == mark_block) {
3317 page->fmark.i = 0;
3318 page->fmark.span = block->lines->first_span;
3319
3320 line = &block->lines[block->len - 1];
3321 page->lmark.i = line->last_span->len - 1;
3322 page->lmark.span = line->last_span;
3323 ret_v = Val_bool (1);
3324 goto unlock;
3325 }
3326
3327 for (line = block->lines;
3328 line < block->lines + block->len;
3329 ++line) {
3330 fz_text_span *span;
3331
3332 b = &line->bbox;
3333 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3334 continue;
3335
3336 if (mark == mark_line) {
3337 page->fmark.i = 0;
3338 page->fmark.span = line->first_span;
3339
3340 page->lmark.i = line->last_span->len - 1;
3341 page->lmark.span = line->last_span;
3342 ret_v = Val_bool (1);
3343 goto unlock;
3344 }
3345
3346 for (span = line->first_span; span; span = span->next) {
3347 int charnum;
3348
3349 b = &span->bbox;
3350 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3351 continue;
3352
3353 for (charnum = 0; charnum < span->len; ++charnum) {
3354 fz_rect bbox;
3355 fz_text_char_bbox (&bbox, span, charnum);
3356 b = &bbox;
3357
3358 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3359 /* unicode ftw */
3360 int charnum2, charnum3 = -1, charnum4 = -1;
3361
3362 if (uninteresting (span->text[charnum].c)) goto unlock;
3363
3364 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3365 if (uninteresting (span->text[charnum2].c)) {
3366 charnum3 = charnum2 + 1;
3367 break;
3368 }
3369 }
3370 if (charnum3 == -1) charnum3 = 0;
3371
3372 for (charnum2 = charnum + 1;
3373 charnum2 < span->len;
3374 ++charnum2) {
3375 if (uninteresting (span->text[charnum2].c)) break;
3376 charnum4 = charnum2;
3377 }
3378 if (charnum4 == -1) goto unlock;
3379
3380 page->fmark.i = charnum3;
3381 page->fmark.span = span;
3382
3383 page->lmark.i = charnum4;
3384 page->lmark.span = span;
3385 ret_v = Val_bool (1);
3386 goto unlock;
3387 }
3388 }
3389 }
3390 }
3391 }
3392 unlock:
3393 if (!Bool_val (ret_v)) {
3394 page->fmark.span = NULL;
3395 page->lmark.span = NULL;
3396 page->fmark.i = 0;
3397 page->lmark.i = 0;
3398 }
3399 unlock ("ml_markunder");
3400
3401 done:
3402 CAMLreturn (ret_v);
3403 }
3404
3405 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3406 {
3407 CAMLparam3 (ptr_v, x_v, y_v);
3408 CAMLlocal2 (ret_v, res_v);
3409 fz_rect *b = NULL;
3410 struct page *page;
3411 fz_page_block *pageb;
3412 struct pagedim *pdim;
3413 char *s = String_val (ptr_v);
3414 int x = Int_val (x_v), y = Int_val (y_v);
3415
3416 ret_v = Val_int (0);
3417 if (trylock ("ml_rectofblock")) {
3418 goto done;
3419 }
3420
3421 page = parse_pointer ("ml_rectofblock", s);
3422 pdim = &state.pagedims[page->pdimno];
3423 x += pdim->bounds.x0;
3424 y += pdim->bounds.y0;
3425
3426 ensuretext (page);
3427
3428 for (pageb = page->text->blocks;
3429 pageb < page->text->blocks + page->text->len;
3430 ++pageb) {
3431 switch (pageb->type) {
3432 case FZ_PAGE_BLOCK_TEXT:
3433 b = &pageb->u.text->bbox;
3434 break;
3435
3436 case FZ_PAGE_BLOCK_IMAGE:
3437 b = &pageb->u.image->bbox;
3438 break;
3439
3440 default:
3441 continue;
3442 }
3443
3444 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3445 break;
3446 b = NULL;
3447 }
3448 if (b) {
3449 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3450 ret_v = caml_alloc_small (1, 1);
3451 Store_double_field (res_v, 0, b->x0);
3452 Store_double_field (res_v, 1, b->x1);
3453 Store_double_field (res_v, 2, b->y0);
3454 Store_double_field (res_v, 3, b->y1);
3455 Field (ret_v, 0) = res_v;
3456 }
3457 unlock ("ml_rectofblock");
3458
3459 done:
3460 CAMLreturn (ret_v);
3461 }
3462
3463 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3464 {
3465 CAMLparam2 (ptr_v, rect_v);
3466 fz_rect b;
3467 struct page *page;
3468 struct pagedim *pdim;
3469 char *s = String_val (ptr_v);
3470 int i, x0, x1, y0, y1, fi, li;
3471 fz_text_line *line;
3472 fz_page_block *pageb;
3473 fz_text_block *block;
3474 fz_text_span *span, *fspan, *lspan;
3475
3476 if (trylock ("ml_seltext")) {
3477 goto done;
3478 }
3479
3480 page = parse_pointer ("ml_seltext", s);
3481 ensuretext (page);
3482
3483 pdim = &state.pagedims[page->pdimno];
3484 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3485 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3486 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3487 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3488
3489 if (y0 > y1) {
3490 int t = y0;
3491 y0 = y1;
3492 y1 = t;
3493 x0 = x1;
3494 x1 = t;
3495 }
3496
3497 if (0) {
3498 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3499 glColor3ub (128, 128, 128);
3500 recti (x0, y0, x1, y1);
3501 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3502 }
3503
3504 fi = page->fmark.i;
3505 fspan = page->fmark.span;
3506
3507 li = page->lmark.i;
3508 lspan = page->lmark.span;
3509
3510 for (pageb = page->text->blocks;
3511 pageb < page->text->blocks + page->text->len;
3512 ++pageb) {
3513 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3514 block = pageb->u.text;
3515 for (line = block->lines;
3516 line < block->lines + block->len;
3517 ++line) {
3518 fz_text_span *span;
3519
3520 for (span = line->first_span; span; span = span->next) {
3521 for (i = 0; i < span->len; ++i) {
3522 int selected = 0;
3523
3524 fz_text_char_bbox (&b, span, i);
3525
3526 if (x0 >= b.x0 && x0 <= b.x1
3527 && y0 >= b.y0 && y0 <= b.y1) {
3528 fspan = span;
3529 fi = i;
3530 selected = 1;
3531 }
3532 if (x1 >= b.x0 && x1 <= b.x1
3533 && y1 >= b.y0 && y1 <= b.y1) {
3534 lspan = span;
3535 li = i;
3536 selected = 1;
3537 }
3538 if (0 && selected) {
3539 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3540 glColor3ub (128, 128, 128);
3541 recti (b.x0, b.y0, b.x1, b.y1);
3542 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3543 }
3544 }
3545 }
3546 }
3547 }
3548 if (x1 < x0 && fspan == lspan) {
3549 i = fi;
3550 span = fspan;
3551
3552 fi = li;
3553 fspan = lspan;
3554
3555 li = i;
3556 lspan = span;
3557 }
3558
3559 page->fmark.i = fi;
3560 page->fmark.span = fspan;
3561
3562 page->lmark.i = li;
3563 page->lmark.span = lspan;
3564
3565 unlock ("ml_seltext");
3566
3567 done:
3568 CAMLreturn (Val_unit);
3569 }
3570
3571 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3572 {
3573 char buf[4];
3574 int i, len, ret;
3575
3576 for (i = a; i <= b; ++i) {
3577 len = fz_runetochar (buf, span->text[i].c);
3578 ret = fwrite (buf, len, 1, f);
3579
3580 if (ret != 1) {
3581 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3582 len, ret, strerror (errno));
3583 return -1;
3584 }
3585 }
3586 return 0;
3587 }
3588
3589 #ifdef __CYGWIN__
3590 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3591 {
3592 caml_failwith ("ml_popen not implemented under Cygwin");
3593 }
3594 #else
3595 CAMLprim value ml_popen (value command_v, value fds_v)
3596 {
3597 CAMLparam2 (command_v, fds_v);
3598 CAMLlocal2 (l_v, tup_v);
3599 int ret;
3600 char *msg = NULL;
3601 value earg_v = Nothing;
3602 posix_spawnattr_t attr;
3603 posix_spawn_file_actions_t fa;
3604 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
3605
3606 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3607 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3608 }
3609
3610 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3611 msg = "posix_spawnattr_init";
3612 goto fail1;
3613 }
3614
3615 #ifdef POSIX_SPAWN_USEVFORK
3616 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3617 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3618 goto fail;
3619 }
3620 #endif
3621
3622 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3623 int fd1, fd2;
3624
3625 tup_v = Field (l_v, 0);
3626 fd1 = Int_val (Field (tup_v, 0));
3627 fd2 = Int_val (Field (tup_v, 1));
3628 if (fd2 < 0) {
3629 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3630 msg = "posix_spawn_file_actions_addclose";
3631 earg_v = tup_v;
3632 goto fail;
3633 }
3634 }
3635 else {
3636 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3637 msg = "posix_spawn_file_actions_adddup2";
3638 earg_v = tup_v;
3639 goto fail;
3640 }
3641 }
3642 }
3643
3644 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3645 msg = "posix_spawn";
3646 goto fail;
3647 }
3648
3649 fail:
3650 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3651 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3652 }
3653
3654 fail1:
3655 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3656 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3657 strerror (ret));
3658 }
3659
3660 if (msg)
3661 unix_error (ret, msg, earg_v);
3662
3663 CAMLreturn (Val_unit);
3664 }
3665 #endif
3666
3667 CAMLprim value ml_hassel (value ptr_v)
3668 {
3669 CAMLparam1 (ptr_v);
3670 CAMLlocal1 (ret_v);
3671 struct page *page;
3672 char *s = String_val (ptr_v);
3673
3674 ret_v = Val_bool (0);
3675 if (trylock ("ml_hassel")) {
3676 goto done;
3677 }
3678
3679 page = parse_pointer ("ml_hassel", s);
3680 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3681 unlock ("ml_hassel");
3682 done:
3683 CAMLreturn (ret_v);
3684 }
3685
3686 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3687 {
3688 CAMLparam2 (fd_v, ptr_v);
3689 FILE *f;
3690 int seen = 0;
3691 struct page *page;
3692 fz_text_line *line;
3693 fz_page_block *pageb;
3694 fz_text_block *block;
3695 int fd = Int_val (fd_v);
3696 char *s = String_val (ptr_v);
3697
3698 if (trylock ("ml_copysel")) {
3699 goto done;
3700 }
3701
3702 page = parse_pointer ("ml_copysel", s);
3703
3704 if (!page->fmark.span || !page->lmark.span) {
3705 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3706 goto unlock;
3707 }
3708
3709 f = fdopen (fd, "w");
3710 if (!f) {
3711 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3712 fd, strerror (errno));
3713 f = stdout;
3714 }
3715
3716 for (pageb = page->text->blocks;
3717 pageb < page->text->blocks + page->text->len;
3718 ++pageb) {
3719 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3720 block = pageb->u.text;
3721 for (line = block->lines;
3722 line < block->lines + block->len;
3723 ++line) {
3724 fz_text_span *span;
3725
3726 for (span = line->first_span; span; span = span->next) {
3727 int a, b;
3728
3729 seen |= span == page->fmark.span || span == page->lmark.span;
3730 a = span == page->fmark.span ? page->fmark.i : 0;
3731 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3732
3733 if (seen) {
3734 if (pipespan (f, span, a, b)) {
3735 goto close;
3736 }
3737 if (span == page->lmark.span) {
3738 goto close;
3739 }
3740 if (span == line->last_span) {
3741 if (putc ('\n', f) == EOF) {
3742 fprintf (stderr,
3743 "failed break line on sel pipe: %s\n",
3744 strerror (errno));
3745 goto close;
3746 }
3747 }
3748 }
3749 }
3750 }
3751 }
3752 close:
3753 if (f != stdout) {
3754 int ret = fclose (f);
3755 fd = -1;
3756 if (ret == -1) {
3757 if (errno != ECHILD) {
3758 fprintf (stderr, "failed to close sel pipe: %s\n",
3759 strerror (errno));
3760 }
3761 }
3762 }
3763 unlock:
3764 unlock ("ml_copysel");
3765
3766 done:
3767 if (fd >= 0) {
3768 if (close (fd)) {
3769 fprintf (stderr, "failed to close sel pipe: %s\n",
3770 strerror (errno));
3771 }
3772 }
3773 CAMLreturn (Val_unit);
3774 }
3775
3776 CAMLprim value ml_getpdimrect (value pagedimno_v)
3777 {
3778 CAMLparam1 (pagedimno_v);
3779 CAMLlocal1 (ret_v);
3780 int pagedimno = Int_val (pagedimno_v);
3781 fz_rect box;
3782
3783 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3784 if (trylock ("ml_getpdimrect")) {
3785 box = fz_empty_rect;
3786 }
3787 else {
3788 box = state.pagedims[pagedimno].mediabox;
3789 unlock ("ml_getpdimrect");
3790 }
3791
3792 Store_double_field (ret_v, 0, box.x0);
3793 Store_double_field (ret_v, 1, box.x1);
3794 Store_double_field (ret_v, 2, box.y0);
3795 Store_double_field (ret_v, 3, box.y1);
3796
3797 CAMLreturn (ret_v);
3798 }
3799
3800 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3801 value dw_v, value cols_v)
3802 {
3803 CAMLparam3 (winw_v, winh_v, dw_v);
3804 CAMLlocal1 (ret_v);
3805 int i;
3806 double zoom = -1.;
3807 double maxh = 0.0;
3808 struct pagedim *p;
3809 double winw = Int_val (winw_v);
3810 double winh = Int_val (winh_v);
3811 double dw = Int_val (dw_v);
3812 double cols = Int_val (cols_v);
3813 double pw = 1.0, ph = 1.0;
3814
3815 if (trylock ("ml_zoom_for_height")) {
3816 goto done;
3817 }
3818
3819 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3820 double w = p->pagebox.x1 / cols;
3821 double h = p->pagebox.y1;
3822 if (h > maxh) {
3823 maxh = h;
3824 ph = h;
3825 if (state.fitmodel != FitProportional) pw = w;
3826 }
3827 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3828 }
3829
3830 zoom = (((winh / ph) * pw) + dw) / winw;
3831 unlock ("ml_zoom_for_height");
3832 done:
3833 ret_v = caml_copy_double (zoom);
3834 CAMLreturn (ret_v);
3835 }
3836
3837 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3838 {
3839 CAMLparam4 (pt_v, x_v, y_v, string_v);
3840 CAMLlocal1 (ret_v);
3841 int pt = Int_val(pt_v);
3842 int x = Int_val (x_v);
3843 int y = Int_val (y_v);
3844 double w;
3845
3846 w = draw_string (state.face, pt, x, y, String_val (string_v));
3847 ret_v = caml_copy_double (w);
3848 CAMLreturn (ret_v);
3849 }
3850
3851 CAMLprim value ml_measure_string (value pt_v, value string_v)
3852 {
3853 CAMLparam2 (pt_v, string_v);
3854 CAMLlocal1 (ret_v);
3855 int pt = Int_val (pt_v);
3856 double w;
3857
3858 w = measure_string (state.face, pt, String_val (string_v));
3859 ret_v = caml_copy_double (w);
3860 CAMLreturn (ret_v);
3861 }
3862
3863 CAMLprim value ml_getpagebox (value opaque_v)
3864 {
3865 CAMLparam1 (opaque_v);
3866 CAMLlocal1 (ret_v);
3867 fz_rect rect;
3868 fz_irect bbox;
3869 fz_matrix ctm;
3870 fz_device *dev;
3871 char *s = String_val (opaque_v);
3872 struct page *page = parse_pointer ("ml_getpagebox", s);
3873
3874 ret_v = caml_alloc_tuple (4);
3875 dev = fz_new_bbox_device (state.ctx, &rect);
3876 dev->hints |= FZ_IGNORE_SHADE;
3877
3878 switch (page->type) {
3879 case DPDF:
3880 ctm = pagectm (page);
3881 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3882 break;
3883
3884 case DXPS:
3885 ctm = pagectm (page);
3886 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3887 break;
3888
3889 default:
3890 rect = fz_infinite_rect;
3891 break;
3892 }
3893
3894 fz_free_device (dev);
3895 fz_round_rect (&bbox, &rect);
3896 Field (ret_v, 0) = Val_int (bbox.x0);
3897 Field (ret_v, 1) = Val_int (bbox.y0);
3898 Field (ret_v, 2) = Val_int (bbox.x1);
3899 Field (ret_v, 3) = Val_int (bbox.y1);
3900
3901 CAMLreturn (ret_v);
3902 }
3903
3904 CAMLprim value ml_setaalevel (value level_v)
3905 {
3906 CAMLparam1 (level_v);
3907
3908 state.aalevel = Int_val (level_v);
3909 CAMLreturn (Val_unit);
3910 }
3911
3912 #undef pixel
3913 #include <X11/Xlib.h>
3914 #include <GL/glx.h>
3915
3916 static struct {
3917 Display *dpy;
3918 GLXContext ctx;
3919 GLXDrawable drawable;
3920 } glx;
3921
3922 #include "keysym2ucs.c"
3923
3924 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3925 {
3926 CAMLparam1 (keysym_v);
3927 CAMLlocal1 (str_v);
3928 KeySym keysym = Int_val (keysym_v);
3929 Rune rune;
3930 int len;
3931 char buf[5];
3932
3933 rune = keysym2ucs (keysym);
3934 len = fz_runetochar (buf, rune);
3935 buf[len] = 0;
3936 str_v = caml_copy_string (buf);
3937 CAMLreturn (str_v);
3938 }
3939
3940 CAMLprim value ml_glx (value win_v)
3941 {
3942 CAMLparam1 (win_v);
3943 XVisualInfo *visual;
3944 int screen, wid = Int_val (win_v);
3945 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3946
3947 glx.dpy = XOpenDisplay (NULL);
3948 if (!glx.dpy) {
3949 caml_failwith ("XOpenDisplay");
3950 }
3951
3952 screen = DefaultScreen (glx.dpy);
3953 visual = glXChooseVisual (glx.dpy, screen, attributes);
3954 if (!visual) {
3955 XCloseDisplay (glx.dpy);
3956 glx.dpy = NULL;
3957 caml_failwith ("glXChooseVisual");
3958 }
3959
3960 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3961 XFree (visual);
3962 if (!glx.ctx) {
3963 XCloseDisplay (glx.dpy);
3964 glx.dpy = NULL;
3965 caml_failwith ("glXCreateContext");
3966 }
3967
3968 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3969 glXDestroyContext (glx.dpy, glx.ctx);
3970 XCloseDisplay (glx.dpy);
3971 glx.dpy = NULL;
3972 glx.ctx = NULL;
3973 caml_failwith ("glXMakeCurrent");
3974 }
3975 glx.drawable = wid;
3976 CAMLreturn (Val_unit);
3977 }
3978
3979 CAMLprim value ml_swapb (value unit_v)
3980 {
3981 CAMLparam1 (unit_v);
3982 glXSwapBuffers (glx.dpy, glx.drawable);
3983 CAMLreturn (Val_unit);
3984 }
3985
3986 CAMLprim value ml_glxsync (value unit_v)
3987 {
3988 CAMLparam1 (unit_v);
3989 if (glx.dpy && glx.ctx) {
3990 glXWaitX ();
3991 glXWaitGL ();
3992 }
3993 CAMLreturn (Val_unit);
3994 }
3995
3996 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3997 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3998
3999 CAMLprim value ml_platform (value unit_v)
4000 {
4001 CAMLparam1 (unit_v);
4002 int platid = piunknown;
4003
4004 #if defined __linux__
4005 platid = pilinux;
4006 #elif defined __CYGWIN__
4007 platid = picygwin;
4008 #elif defined __DragonFly__
4009 platid = pidragonflybsd;
4010 #elif defined __FreeBSD__
4011 platid = pifreebsd;
4012 #elif defined __OpenBSD__
4013 platid = piopenbsd;
4014 #elif defined __NetBSD__
4015 platid = pinetbsd;
4016 #elif defined __sun__
4017 platid = pisun;
4018 #elif defined __APPLE__
4019 platid = piosx;
4020 #endif
4021 CAMLreturn (Val_int (platid));
4022 }
4023
4024 CAMLprim value ml_cloexec (value fd_v)
4025 {
4026 CAMLparam1 (fd_v);
4027 int fd = Int_val (fd_v);
4028
4029 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
4030 uerror ("fcntl", Nothing);
4031 }
4032 CAMLreturn (Val_unit);
4033 }
4034
4035 CAMLprim value ml_getpbo (value w_v, value h_v, value cs_v)
4036 {
4037 CAMLparam2 (w_v, h_v);
4038 CAMLlocal1 (ret_v);
4039 struct pbo *pbo;
4040 int w = Int_val (w_v);
4041 int h = Int_val (h_v);
4042 int cs = Int_val (cs_v);
4043
4044 if (state.pbo_usable) {
4045 pbo = calloc (sizeof (*pbo), 1);
4046 if (!pbo) {
4047 err (1, "calloc pbo");
4048 }
4049
4050 switch (cs) {
4051 case 0:
4052 case 1:
4053 pbo->size = w*h*4;
4054 break;
4055 case 2:
4056 pbo->size = w*h*2;
4057 break;
4058 default:
4059 errx (1, "ml_getpbo: invalid colorspace %d", cs);
4060 }
4061
4062 state.glGenBuffersARB (1, &pbo->id);
4063 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->id);
4064 state.glBufferDataARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->size,
4065 NULL, GL_STREAM_DRAW);
4066 pbo->ptr = state.glMapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB,
4067 GL_READ_WRITE);
4068 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4069 if (!pbo->ptr) {
4070 fprintf (stderr, "glMapBufferARB failed: %#x\n", glGetError ());
4071 state.glDeleteBuffersARB (1, &pbo->id);
4072 free (pbo);
4073 ret_v = caml_copy_string ("0");
4074 }
4075 else {
4076 int res;
4077 char *s;
4078
4079 res = snprintf (NULL, 0, "%" FMT_ptr, pbo);
4080 if (res < 0) {
4081 err (1, "snprintf %" FMT_ptr " failed", pbo);
4082 }
4083 s = malloc (res+1);
4084 if (!s) {
4085 err (1, "malloc %d bytes failed", res+1);
4086 }
4087 res = sprintf (s, "%" FMT_ptr, pbo);
4088 if (res < 0) {
4089 err (1, "sprintf %" FMT_ptr " failed", pbo);
4090 }
4091 ret_v = caml_copy_string (s);
4092 free (s);
4093 }
4094 }
4095 else {
4096 ret_v = caml_copy_string ("0");
4097 }
4098 CAMLreturn (ret_v);
4099 }
4100
4101 CAMLprim value ml_freepbo (value s_v)
4102 {
4103 CAMLparam1 (s_v);
4104 char *s = String_val (s_v);
4105 struct tile *tile = parse_pointer ("ml_freepbo", s);
4106
4107 if (tile->pbo) {
4108 state.glDeleteBuffersARB (1, &tile->pbo->id);
4109 tile->pbo->id = -1;
4110 tile->pbo->ptr = NULL;
4111 tile->pbo->size = -1;
4112 }
4113 CAMLreturn (Val_unit);
4114 }
4115
4116 CAMLprim value ml_unmappbo (value s_v)
4117 {
4118 CAMLparam1 (s_v);
4119 char *s = String_val (s_v);
4120 struct tile *tile = parse_pointer ("ml_unmappbo", s);
4121
4122 if (tile->pbo) {
4123 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
4124 if (state.glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) == GL_FALSE) {
4125 errx (1, "glUnmapBufferARB failed: %#x\n", glGetError ());
4126 }
4127 tile->pbo->ptr = NULL;
4128 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4129 }
4130 CAMLreturn (Val_unit);
4131 }
4132
4133 static void setuppbo (void)
4134 {
4135 #define GGPA(n) (*(void (**) ()) &state.n = glXGetProcAddress ((GLubyte *) #n))
4136 state.pbo_usable = GGPA (glBindBufferARB)
4137 && GGPA (glUnmapBufferARB)
4138 && GGPA (glMapBufferARB)
4139 && GGPA (glBufferDataARB)
4140 && GGPA (glGenBuffersARB)
4141 && GGPA (glDeleteBuffersARB);
4142 #undef GGPA
4143 }
4144
4145 CAMLprim value ml_pbo_usable (value unit_v)
4146 {
4147 CAMLparam1 (unit_v);
4148 CAMLreturn (Val_bool (state.pbo_usable));
4149 }
4150
4151 CAMLprim value ml_unproject (value ptr_v, value x_v, value y_v)
4152 {
4153 CAMLparam3 (ptr_v, x_v, y_v);
4154 CAMLlocal2 (ret_v, tup_v);
4155 struct page *page;
4156 char *s = String_val (ptr_v);
4157 int x = Int_val (x_v), y = Int_val (y_v);
4158 struct pagedim *pdim;
4159 fz_point p;
4160 fz_matrix ctm;
4161
4162 page = parse_pointer ("ml_unproject", s);
4163 pdim = &state.pagedims[page->pdimno];
4164
4165 ret_v = Val_int (0);
4166 if (trylock ("ml_unproject")) {
4167 goto done;
4168 }
4169
4170 switch (page->type) {
4171 case DPDF:
4172 trimctm (page->u.pdfpage, page->pdimno);
4173 break;
4174
4175 default:
4176 break;
4177 }
4178 p.x = x + pdim->bounds.x0;
4179 p.y = y + pdim->bounds.y0;
4180
4181 fz_concat (&ctm, &pdim->tctm, &pdim->ctm);
4182 fz_invert_matrix (&ctm, &ctm);
4183 fz_transform_point (&p, &ctm);
4184
4185 tup_v = caml_alloc_tuple (2);
4186 ret_v = caml_alloc_small (1, 1);
4187 Field (tup_v, 0) = Val_int (p.x);
4188 Field (tup_v, 1) = Val_int (p.y);
4189 Field (ret_v, 0) = tup_v;
4190
4191 unlock ("ml_unproject");
4192 done:
4193 CAMLreturn (ret_v);
4194 }
4195
4196 static void makestippletex (void)
4197 {
4198 const char pixels[] = "\xff\xff\0\0";
4199 glGenTextures (1, &state.stid);
4200 glBindTexture (GL_TEXTURE_1D, state.stid);
4201 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
4202 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
4203 glTexImage1D (
4204 GL_TEXTURE_1D,
4205 0,
4206 GL_ALPHA,
4207 4,
4208 0,
4209 GL_ALPHA,
4210 GL_UNSIGNED_BYTE,
4211 pixels
4212 );
4213 }
4214
4215 CAMLprim value ml_fz_version (value unit_v)
4216 {
4217 return caml_copy_string (FZ_VERSION);
4218 }
4219
4220 #ifdef USE_FONTCONFIG
4221 static struct {
4222 int inited;
4223 FcConfig *config;
4224 } fc;
4225
4226 static fz_font *fc_load_system_font_func (fz_context *ctx,
4227 const char *name,
4228 int bold,
4229 int italic,
4230 int needs_exact_metrics)
4231 {
4232 char *buf;
4233 size_t i, size;
4234 fz_font *font;
4235 FcChar8 *path;
4236 FcResult result;
4237 FcPattern *pat, *pat1;
4238
4239 lprintf ("looking up %s bold:%d italic:%d needs_exact_metrics:%d\n",
4240 name, bold, italic, needs_exact_metrics);
4241 if (!fc.inited) {
4242 fc.inited = 1;
4243 fc.config = FcInitLoadConfigAndFonts ();
4244 if (!fc.config) {
4245 lprintf ("FcInitLoadConfigAndFonts failed\n");
4246 return NULL;
4247 }
4248 }
4249 if (!fc.config) return NULL;
4250
4251 size = strlen (name);
4252 if (bold) size += sizeof (":bold") - 1;
4253 if (italic) size += sizeof (":italic") - 1;
4254 size += 1;
4255
4256 buf = malloc (size);
4257 if (!buf) {
4258 err (1, "malloc %zu failed", size);
4259 }
4260
4261 strcpy (buf, name);
4262 if (bold && italic) {
4263 strcat (buf, ":bold:italic");
4264 }
4265 else {
4266 if (bold) strcat (buf, ":bold");
4267 if (italic) strcat (buf, ":italic");
4268 }
4269 for (i = 0; i < size; ++i) {
4270 if (buf[i] == ',' || buf[i] == '-') buf[i] = ':';
4271 }
4272
4273 lprintf ("fcbuf=%s\n", buf);
4274 pat = FcNameParse ((FcChar8 *) buf);
4275 if (!pat) {
4276 printd ("emsg FcNameParse failed\n");
4277 free (buf);
4278 return NULL;
4279 }
4280
4281 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4282 printd ("emsg FcConfigSubstitute failed\n");
4283 free (buf);
4284 return NULL;
4285 }
4286 FcDefaultSubstitute (pat);
4287
4288 pat1 = FcFontMatch (fc.config, pat, &result);
4289 if (!pat1) {
4290 printd ("emsg FcFontMatch failed\n");
4291 FcPatternDestroy (pat);
4292 free (buf);
4293 return NULL;
4294 }
4295
4296 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4297 printd ("emsg FcPatternGetString failed\n");
4298 FcPatternDestroy (pat);
4299 FcPatternDestroy (pat1);
4300 free (buf);
4301 return NULL;
4302 }
4303
4304 #if 0
4305 printd ("emsg name=%s path=%s\n", name, path);
4306 #endif
4307 font = fz_new_font_from_file (ctx, name, (char *) path, 0, 0);
4308 FcPatternDestroy (pat);
4309 FcPatternDestroy (pat1);
4310 free (buf);
4311 return font;
4312 }
4313 #endif
4314
4315 CAMLprim value ml_init (value pipe_v, value params_v)
4316 {
4317 CAMLparam2 (pipe_v, params_v);
4318 CAMLlocal2 (trim_v, fuzz_v);
4319 int ret;
4320 int texcount;
4321 char *fontpath;
4322 int colorspace;
4323 int mustoresize;
4324 int haspboext;
4325 struct sigaction sa;
4326
4327 state.cr = Int_val (Field (pipe_v, 0));
4328 state.cw = Int_val (Field (pipe_v, 1));
4329 state.rotate = Int_val (Field (params_v, 0));
4330 state.fitmodel = Int_val (Field (params_v, 1));
4331 trim_v = Field (params_v, 2);
4332 texcount = Int_val (Field (params_v, 3));
4333 state.sliceheight = Int_val (Field (params_v, 4));
4334 mustoresize = Int_val (Field (params_v, 5));
4335 colorspace = Int_val (Field (params_v, 6));
4336 fontpath = String_val (Field (params_v, 7));
4337
4338 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4339 if (!state.trimcachepath) {
4340 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4341 strerror (errno));
4342 }
4343 haspboext = Bool_val (Field (params_v, 9));
4344
4345 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4346
4347 #ifdef USE_FONTCONFIG
4348 fz_install_load_system_font_funcs (
4349 state.ctx, fc_load_system_font_func, NULL
4350 );
4351 #endif
4352
4353 state.trimmargins = Bool_val (Field (trim_v, 0));
4354 fuzz_v = Field (trim_v, 1);
4355 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4356 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4357 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4358 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4359
4360 set_tex_params (colorspace);
4361
4362 if (*fontpath) {
4363 #ifndef USE_FONTCONFIG
4364 state.face = load_font (fontpath);
4365 #else
4366 FcChar8 *path;
4367 FcResult result;
4368 char *buf = fontpath;
4369 FcPattern *pat, *pat1;
4370
4371 fc.inited = 1;
4372 fc.config = FcInitLoadConfigAndFonts ();
4373 if (!fc.config) {
4374 errx (1, "FcInitLoadConfigAndFonts failed");
4375 }
4376
4377 pat = FcNameParse ((FcChar8 *) buf);
4378 if (!pat) {
4379 errx (1, "FcNameParse failed");
4380 }
4381
4382 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4383 errx (1, "FcConfigSubstitute failed");
4384 }
4385 FcDefaultSubstitute (pat);
4386
4387 pat1 = FcFontMatch (fc.config, pat, &result);
4388 if (!pat1) {
4389 errx (1, "FcFontMatch failed");
4390 }
4391
4392 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4393 errx (1, "FcPatternGetString failed");
4394 }
4395
4396 state.face = load_font ((char *) path);
4397 FcPatternDestroy (pat);
4398 FcPatternDestroy (pat1);
4399 #endif
4400 }
4401 else {
4402 unsigned int len;
4403 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4404
4405 state.face = load_builtin_font (base, len);
4406 }
4407 if (!state.face) _exit (1);
4408
4409 realloctexts (texcount);
4410
4411 if (haspboext) {
4412 setuppbo ();
4413 }
4414
4415 makestippletex ();
4416
4417 #ifdef __CYGWIN__
4418 sa.sa_handler = SIG_IGN;
4419 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4420 #else
4421 sa.sa_handler = SIG_DFL;
4422 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4423 #endif
4424 if (sigemptyset (&sa.sa_mask)) {
4425 err (1, "sigemptyset");
4426 }
4427 if (sigaction (SIGCHLD, &sa, NULL)) {
4428 err (1, "sigaction");
4429 }
4430
4431 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4432 if (ret) {
4433 errx (1, "pthread_create: %s", strerror (ret));
4434 }
4435
4436 CAMLreturn (Val_unit);
4437 }
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