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Hummm...
[llpp.git] / link.c
blob2e7c08f046328e97050a740b67073606c08b72f3
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 #include <sys/utsname.h>
16
17 #ifdef __CYGWIN__
18 #include <cygwin/socket.h> /* FIONREAD */
19 #else
20 #include <spawn.h>
21 #endif
22
23 #include <regex.h>
24 #include <stdarg.h>
25 #include <limits.h>
26 #include <inttypes.h>
27
28 #include <GL/gl.h>
29
30 #include <caml/fail.h>
31 #include <caml/alloc.h>
32 #include <caml/memory.h>
33 #include <caml/unixsupport.h>
34
35 #include <mupdf/fitz.h>
36 #include <mupdf/cbz.h>
37 #include <mupdf/pdf.h>
38 #include <mupdf/xps.h>
39 #include <mupdf/img.h>
40
41 #include <ft2build.h>
42 #include FT_FREETYPE_H
43
44 #ifdef USE_FONTCONFIG
45 #include <fontconfig/fontconfig.h>
46 #endif
47
48 #define PIGGYBACK
49 #define SUMATRA_LOOKUP
50
51 #ifndef __USE_GNU
52 extern char **environ;
53 #endif
54
55 #define MIN(a,b) ((a) < (b) ? (a) : (b))
56 #define MAX(a,b) ((a) > (b) ? (a) : (b))
57
58 #if defined __GNUC__
59 #define NORETURN_ATTR __attribute__ ((noreturn))
60 #define UNUSED_ATTR __attribute__ ((unused))
61 #if !defined __clang__
62 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
63 #else
64 #define OPTIMIZE_ATTR(n)
65 #endif
66 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
67 #else
68 #define NORETURN_ATTR
69 #define UNUSED_ATTR
70 #define OPTIMIZE_ATTR(n)
71 #define GCC_FMT_ATTR(a, b)
72 #endif
73
74 #define FMT_s "zu"
75
76 #define FMT_ptr PRIxPTR
77 #define SCN_ptr SCNxPTR
78 #define FMT_ptr_cast(p) ((uintptr_t) (p))
79 #define SCN_ptr_cast(p) ((uintptr_t *) (p))
80
81 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
82 err (int exitcode, const char *fmt, ...)
83 {
84 va_list ap;
85 int savederrno;
86
87 savederrno = errno;
88 va_start (ap, fmt);
89 vfprintf (stderr, fmt, ap);
90 va_end (ap);
91 fprintf (stderr, ": %s\n", strerror (savederrno));
92 fflush (stderr);
93 _exit (exitcode);
94 }
95
96 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
97 errx (int exitcode, const char *fmt, ...)
98 {
99 va_list ap;
100
101 va_start (ap, fmt);
102 vfprintf (stderr, fmt, ap);
103 va_end (ap);
104 fputc ('\n', stderr);
105 fflush (stderr);
106 _exit (exitcode);
107 }
108
109 #ifndef GL_TEXTURE_RECTANGLE_ARB
110 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
111 #endif
112
113 #ifndef GL_BGRA
114 #define GL_BGRA 0x80E1
115 #endif
116
117 #ifndef GL_UNSIGNED_INT_8_8_8_8
118 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
119 #endif
120
121 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
122 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
123 #endif
124
125 #if 0
126 #define lprintf printf
127 #else
128 #define lprintf(...)
129 #endif
130
131 #define ARSERT(cond) for (;;) { \
132 if (!(cond)) { \
133 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
134 } \
135 break; \
136 }
137
138 struct slice {
139 int h;
140 int texindex;
141 };
142
143 struct tile {
144 int w, h;
145 int slicecount;
146 int sliceheight;
147 struct pbo *pbo;
148 fz_pixmap *pixmap;
149 struct slice slices[1];
150 };
151
152 struct pagedim {
153 int pageno;
154 int rotate;
155 int left;
156 int tctmready;
157 fz_irect bounds;
158 fz_rect pagebox;
159 fz_rect mediabox;
160 fz_matrix ctm, zoomctm, lctm, tctm;
161 };
162
163 struct slink {
164 fz_irect bbox;
165 fz_link *link;
166 };
167
168 enum { DPDF, DXPS, DCBZ, DIMG };
169
170 struct page {
171 int tgen;
172 int sgen;
173 int type;
174 int pageno;
175 int pdimno;
176 fz_text_page *text;
177 fz_text_sheet *sheet;
178 union {
179 void *ptr;
180 pdf_page *pdfpage;
181 xps_page *xpspage;
182 cbz_page *cbzpage;
183 image_page *imgpage;
184 } u;
185 fz_display_list *dlist;
186 int slinkcount;
187 struct slink *slinks;
188 struct mark {
189 int i;
190 fz_text_span *span;
191 } fmark, lmark;
192 void (*freepage) (void *);
193 };
194
195 struct {
196 int type;
197 int sliceheight;
198 struct pagedim *pagedims;
199 int pagecount;
200 int pagedimcount;
201 union {
202 pdf_document *pdf;
203 xps_document *xps;
204 cbz_document *cbz;
205 image_document *img;
206 } u;
207 fz_context *ctx;
208 int w, h;
209
210 int texindex;
211 int texcount;
212 GLuint *texids;
213
214 GLenum texiform;
215 GLenum texform;
216 GLenum texty;
217
218 fz_colorspace *colorspace;
219
220 struct {
221 int w, h;
222 struct slice *slice;
223 } *texowners;
224
225 int rotate;
226 enum { FitWidth, FitProportional, FitPage } fitmodel;
227 int trimmargins;
228 int needoutline;
229 int gen;
230 int aalevel;
231
232 int trimanew;
233 fz_irect trimfuzz;
234 fz_pixmap *pig;
235
236 pthread_t thread;
237 int csock;
238 FT_Face face;
239
240 void (*closedoc) (void);
241 void (*freepage) (void *);
242
243 char *trimcachepath;
244 int cxack;
245
246 GLuint stid;
247
248 int pbo_usable;
249 void (*glBindBufferARB) (GLenum, GLuint);
250 GLboolean (*glUnmapBufferARB) (GLenum);
251 void *(*glMapBufferARB) (GLenum, GLenum);
252 void (*glBufferDataARB) (GLenum, GLsizei, void *, GLenum);
253 void (*glGenBuffersARB) (GLsizei, GLuint *);
254 void (*glDeleteBuffersARB) (GLsizei, GLuint *);
255
256 GLfloat texcoords[8];
257 GLfloat vertices[16];
258
259 #ifdef SUMATRA_LOOKUP
260 struct {
261 int count;
262 pdf_obj **objs;
263 pdf_document *pdf;
264 } pdflut;
265 #endif
266 } state;
267
268 struct pbo {
269 GLuint id;
270 void *ptr;
271 size_t size;
272 };
273
274 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
275 {
276 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
277 }
278
279 static void UNUSED_ATTR debug_bbox (const char *cap, fz_irect r)
280 {
281 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
282 }
283
284 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
285 {
286 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
287 m.a, m.b, m.c, m.d, m.e, m.f);
288 }
289
290 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
291
292 static void lock (const char *cap)
293 {
294 int ret = pthread_mutex_lock (&mutex);
295 if (ret) {
296 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
297 }
298 }
299
300 static void unlock (const char *cap)
301 {
302 int ret = pthread_mutex_unlock (&mutex);
303 if (ret) {
304 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
305 }
306 }
307
308 static int trylock (const char *cap)
309 {
310 int ret = pthread_mutex_trylock (&mutex);
311 if (ret && ret != EBUSY) {
312 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
313 }
314 return ret == EBUSY;
315 }
316
317 static void *parse_pointer (const char *cap, const char *s)
318 {
319 int ret;
320 void *ptr;
321
322 ret = sscanf (s, "%" SCN_ptr, SCN_ptr_cast (&ptr));
323 if (ret != 1) {
324 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
325 }
326 return ptr;
327 }
328
329 static double now (void)
330 {
331 struct timeval tv;
332
333 if (gettimeofday (&tv, NULL)) {
334 err (1, "gettimeofday");
335 }
336 return tv.tv_sec + tv.tv_usec*1e-6;
337 }
338
339 static int hasdata (void)
340 {
341 int ret, avail;
342 ret = ioctl (state.csock, FIONREAD, &avail);
343 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
344 return avail > 0;
345 }
346
347 CAMLprim value ml_hasdata (value fd_v)
348 {
349 CAMLparam1 (fd_v);
350 int ret, avail;
351
352 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
353 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
354 CAMLreturn (Val_bool (avail > 0));
355 }
356
357 static void readdata (void *p, int size)
358 {
359 ssize_t n;
360
361 again:
362 n = read (state.csock, p, size);
363 if (n < 0) {
364 if (errno == EINTR) goto again;
365 err (1, "read (req %d, ret %zd)", size, n);
366 }
367 if (n - size) {
368 if (!n) errx (1, "EOF while reading");
369 errx (1, "read (req %d, ret %zd)", size, n);
370 }
371 }
372
373 static void writedata (char *p, int size)
374 {
375 ssize_t n;
376
377 p[0] = (size >> 24) & 0xff;
378 p[1] = (size >> 16) & 0xff;
379 p[2] = (size >> 8) & 0xff;
380 p[3] = (size >> 0) & 0xff;
381
382 n = write (state.csock, p, size + 4);
383 if (n - size - 4) {
384 if (!n) errx (1, "EOF while writing data");
385 err (1, "write (req %d, ret %zd)", size + 4, n);
386 }
387 }
388
389 static int readlen (void)
390 {
391 unsigned char p[4];
392
393 readdata (p, 4);
394 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
395 }
396
397 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
398 {
399 int size = 200, len;
400 va_list ap;
401 char *buf;
402
403 buf = malloc (size);
404 for (;;) {
405 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
406
407 va_start (ap, fmt);
408 len = vsnprintf (buf + 4, size - 4, fmt, ap);
409 va_end (ap);
410
411 if (len > -1) {
412 if (len < size - 4) {
413 writedata (buf, len);
414 break;
415 }
416 else size = len + 5;
417 }
418 else {
419 err (1, "vsnprintf for `%s' failed", fmt);
420 }
421 buf = realloc (buf, size);
422 }
423 free (buf);
424 }
425
426 static void closepdf (void)
427 {
428 #ifdef SUMATRA_LOOKUP
429 if (state.pdflut.objs) {
430 int i;
431
432 for (i = 0; i < state.pdflut.count; ++i) {
433 pdf_drop_obj (state.pdflut.objs[i]);
434 }
435 free (state.pdflut.objs);
436 state.pdflut.objs = NULL;
437 }
438 #endif
439
440 if (state.u.pdf) {
441 pdf_close_document (state.u.pdf);
442 state.u.pdf = NULL;
443 }
444 }
445
446 static void closexps (void)
447 {
448 if (state.u.xps) {
449 xps_close_document (state.u.xps);
450 state.u.xps = NULL;
451 }
452 }
453
454 static void closecbz (void)
455 {
456 if (state.u.cbz) {
457 cbz_close_document (state.u.cbz);
458 state.u.cbz = NULL;
459 }
460 }
461
462 static void closeimg (void)
463 {
464 if (state.u.img) {
465 image_close_document (state.u.img);
466 state.u.img = NULL;
467 }
468 }
469
470 static void freepdfpage (void *ptr)
471 {
472 pdf_free_page (state.u.pdf, ptr);
473 }
474
475 static void freeemptyxxxpage (void *ptr)
476 {
477 (void) ptr;
478 }
479
480 static void freexpspage (void *ptr)
481 {
482 xps_free_page (state.u.xps, ptr);
483 }
484
485 static void freecbzpage (void *ptr)
486 {
487 cbz_free_page (state.u.cbz, ptr);
488 }
489
490 static void freeimgpage (void *ptr)
491 {
492 image_free_page (state.u.img, ptr);
493 }
494
495 static void openxref (char *filename, char *password)
496 {
497 int i, len;
498
499 for (i = 0; i < state.texcount; ++i) {
500 state.texowners[i].w = -1;
501 state.texowners[i].slice = NULL;
502 }
503
504 if (state.closedoc) state.closedoc ();
505
506 len = strlen (filename);
507
508 state.type = DPDF;
509 {
510 int i;
511 struct {
512 char *ext;
513 int type;
514 } tbl[] = {
515 { "pdf", DPDF },
516 { "xps", DXPS },
517 { "zip", DCBZ },
518 { "cbz", DCBZ },
519 { "jpg", DIMG },
520 { "jpeg", DIMG },
521 { "png", DIMG }
522 };
523
524 for (i = 0; i < sizeof (tbl) / sizeof (*tbl); ++i) {
525 int len2 = strlen (tbl[i].ext);
526
527 if (len2 < len && !strcasecmp (tbl[i].ext, filename + len - len2)) {
528 state.type = tbl[i].type;
529 break;
530 }
531 }
532 }
533
534 if (state.pagedims) {
535 free (state.pagedims);
536 state.pagedims = NULL;
537 }
538 state.pagedimcount = 0;
539
540 fz_set_aa_level (state.ctx, state.aalevel);
541 switch (state.type) {
542 case DPDF:
543 state.u.pdf = pdf_open_document (state.ctx, filename);
544 if (pdf_needs_password (state.u.pdf)) {
545 int okay = pdf_authenticate_password (state.u.pdf, password);
546 if (!okay) {
547 errx (1, "invalid password");
548 }
549 }
550 state.pagecount = pdf_count_pages (state.u.pdf);
551 state.closedoc = closepdf;
552 state.freepage = freepdfpage;
553 break;
554
555 case DXPS:
556 state.u.xps = xps_open_document (state.ctx, filename);
557 state.pagecount = xps_count_pages (state.u.xps);
558 state.closedoc = closexps;
559 state.freepage = freexpspage;
560 break;
561
562 case DCBZ:
563 state.u.cbz = cbz_open_document (state.ctx, filename);
564 state.pagecount = cbz_count_pages (state.u.cbz);
565 state.closedoc = closecbz;
566 state.freepage = freecbzpage;
567 break;
568
569 case DIMG:
570 state.u.img = image_open_document (state.ctx, filename);
571 state.pagecount = 1;
572 state.closedoc = closeimg;
573 state.freepage = freeimgpage;
574 break;
575 }
576 }
577
578 static void pdfinfo (void)
579 {
580 if (state.type == DPDF) {
581 pdf_obj *infoobj;
582
583 printd ("info PDF version\t%d.%d",
584 state.u.pdf->version / 10, state.u.pdf->version % 10);
585
586 infoobj = pdf_dict_gets (pdf_trailer (state.u.pdf), "Info");
587 if (infoobj) {
588 unsigned int i;
589 char *s;
590 char *items[] = { "Title", "Author", "Creator",
591 "Producer", "CreationDate" };
592
593 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
594 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
595 s = pdf_to_utf8 (state.u.pdf, obj);
596 if (*s) {
597 if (i == 0) {
598 printd ("title %s", s);
599 }
600 printd ("info %s\t%s", items[i], s);
601 }
602 fz_free (state.ctx, s);
603 }
604 }
605 printd ("infoend");
606 }
607 }
608
609 static void unlinktile (struct tile *tile)
610 {
611 int i;
612
613 for (i = 0; i < tile->slicecount; ++i) {
614 struct slice *s = &tile->slices[i];
615
616 if (s->texindex != -1) {
617 if (state.texowners[s->texindex].slice == s) {
618 state.texowners[s->texindex].slice = NULL;
619 }
620 }
621 }
622 }
623
624 static void freepage (struct page *page)
625 {
626 if (page->text) {
627 fz_free_text_page (state.ctx, page->text);
628 }
629 if (page->sheet) {
630 fz_free_text_sheet (state.ctx, page->sheet);
631 }
632 if (page->slinks) {
633 free (page->slinks);
634 }
635 fz_drop_display_list (state.ctx, page->dlist);
636 page->freepage (page->u.ptr);
637 free (page);
638 }
639
640 static void freetile (struct tile *tile)
641 {
642 unlinktile (tile);
643 if (!tile->pbo) {
644 #ifndef PIGGYBACK
645 fz_drop_pixmap (state.ctx, tile->pixmap);
646 #else
647 if (state.pig) {
648 fz_drop_pixmap (state.ctx, state.pig);
649 }
650 state.pig = tile->pixmap;
651 #endif
652 }
653 else {
654 free (tile->pbo);
655 fz_drop_pixmap (state.ctx, tile->pixmap);
656 }
657 free (tile);
658 }
659
660 #ifdef __ALTIVEC__
661 #include <stdint.h>
662 #include <altivec.h>
663
664 static int cacheline32bytes;
665
666 static void __attribute__ ((constructor)) clcheck (void)
667 {
668 char **envp = environ;
669 unsigned long *auxv;
670
671 while (*envp++);
672
673 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
674 if (*auxv == 19) {
675 cacheline32bytes = auxv[1] == 32;
676 return;
677 }
678 }
679 }
680
681 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
682 {
683 size_t size = pixmap->w * pixmap->h * pixmap->n;
684 if (cacheline32bytes && size > 32) {
685 intptr_t a1, a2, diff;
686 size_t sizea, i;
687 vector unsigned char v = vec_splat_u8 (-1);
688 vector unsigned char *p;
689
690 a1 = a2 = (intptr_t) pixmap->samples;
691 a2 = (a1 + 31) & ~31;
692 diff = a2 - a1;
693 sizea = size - diff;
694 p = (void *) a2;
695
696 while (a1 != a2) *(char *) a1++ = 0xff;
697 for (i = 0; i < (sizea & ~31); i += 32) {
698 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
699 vec_st (v, i, p);
700 vec_st (v, i + 16, p);
701 }
702 while (i < sizea) *((char *) a1 + i++) = 0xff;
703 }
704 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
705 }
706 #else
707 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
708 #endif
709
710 static void trimctm (pdf_page *page, int pindex)
711 {
712 fz_matrix ctm;
713 struct pagedim *pdim = &state.pagedims[pindex];
714
715 if (!pdim->tctmready) {
716 if (state.trimmargins) {
717 fz_rect realbox;
718 fz_matrix rm, sm, tm, im, ctm1;
719
720 fz_rotate (&rm, -pdim->rotate);
721 fz_scale (&sm, 1, -1);
722 fz_concat (&ctm, &rm, &sm);
723 realbox = pdim->mediabox;
724 fz_transform_rect (&realbox, &ctm);
725 fz_translate (&tm, -realbox.x0, -realbox.y0);
726 fz_concat (&ctm1, &ctm, &tm);
727 fz_invert_matrix (&im, &page->ctm);
728 fz_concat (&ctm, &im, &ctm1);
729 }
730 else {
731 ctm = fz_identity;
732 }
733 pdim->tctm = ctm;
734 pdim->tctmready = 1;
735 }
736 }
737
738 static fz_matrix pagectm (struct page *page)
739 {
740 fz_matrix ctm, tm;
741
742 if (page->type == DPDF) {
743 trimctm (page->u.pdfpage, page->pdimno);
744 fz_concat (&ctm,
745 &state.pagedims[page->pdimno].tctm,
746 &state.pagedims[page->pdimno].ctm);
747 }
748 else {
749 struct pagedim *pdim = &state.pagedims[page->pdimno];
750
751 fz_translate (&tm, -pdim->mediabox.x0, -pdim->mediabox.y0);
752 fz_concat (&ctm, &tm, &state.pagedims[page->pdimno].ctm);
753 }
754 return ctm;
755 }
756
757 static void *loadpage (int pageno, int pindex)
758 {
759 fz_device *dev;
760 struct page *page;
761
762 page = calloc (sizeof (struct page), 1);
763 if (!page) {
764 err (1, "calloc page %d", pageno);
765 }
766
767 page->dlist = fz_new_display_list (state.ctx);
768 dev = fz_new_list_device (state.ctx, page->dlist);
769 fz_try (state.ctx) {
770 switch (state.type) {
771 case DPDF:
772 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
773 pdf_run_page (state.u.pdf, page->u.pdfpage, dev,
774 &fz_identity, NULL);
775 page->freepage = freepdfpage;
776 break;
777
778 case DXPS:
779 page->u.xpspage = xps_load_page (state.u.xps, pageno);
780 xps_run_page (state.u.xps, page->u.xpspage, dev,
781 &fz_identity, NULL);
782 page->freepage = freexpspage;
783 break;
784
785 case DCBZ:
786 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
787 cbz_run_page (state.u.cbz, page->u.cbzpage, dev,
788 &fz_identity, NULL);
789 page->freepage = freecbzpage;
790 break;
791
792 case DIMG:
793 page->u.imgpage = image_load_page (state.u.img, pageno);
794 image_run_page (state.u.img, page->u.imgpage, dev,
795 &fz_identity, NULL);
796 page->freepage = freeimgpage;
797 break;
798 }
799 }
800 fz_catch (state.ctx) {
801 page->u.ptr = NULL;
802 page->freepage = freeemptyxxxpage;
803 }
804 fz_free_device (dev);
805
806 page->pdimno = pindex;
807 page->pageno = pageno;
808 page->sgen = state.gen;
809 page->tgen = state.gen;
810 page->type = state.type;
811
812 return page;
813 }
814
815 static struct tile *alloctile (int h)
816 {
817 int i;
818 int slicecount;
819 size_t tilesize;
820 struct tile *tile;
821
822 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
823 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
824 tile = calloc (tilesize, 1);
825 if (!tile) {
826 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
827 }
828 for (i = 0; i < slicecount; ++i) {
829 int sh = MIN (h, state.sliceheight);
830 tile->slices[i].h = sh;
831 tile->slices[i].texindex = -1;
832 h -= sh;
833 }
834 tile->slicecount = slicecount;
835 tile->sliceheight = state.sliceheight;
836 return tile;
837 }
838
839 #ifdef OBSCURED_OPT
840 struct obs {
841 int cured;
842 fz_irect b;
843 };
844
845 static void obs_fill_image (fz_device *dev, fz_image UNUSED_ATTR *image,
846 const fz_matrix *ctm, float alpha)
847 {
848 struct obs *obs = dev->user;
849
850 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
851 fz_irect b;
852 fz_rect rect = fz_unit_rect;
853
854 fz_transform_rect (&rect, ctm);
855 fz_round_rect (&b, &rect);
856 fz_intersect_irect (&b, &obs->b);
857 obs->cured = b.x0 == obs->b.x0
858 && b.x1 == obs->b.x1
859 && b.y0 == obs->b.y0
860 && b.y1 == obs->b.y1;
861 }
862 }
863
864 static int obscured (struct page *page, fz_irect bbox)
865 {
866 fz_rect rect;
867 fz_matrix ctm;
868 fz_device dev;
869 struct obs obs;
870
871 memset (&dev, 0, sizeof (dev));
872 memset (&obs, 0, sizeof (obs));
873 dev.hints = 0;
874 dev.flags = 0;
875 dev.user = &obs;
876 dev.ctx = state.ctx;
877 dev.fill_image = obs_fill_image;
878 obs.b = bbox;
879 fz_rect_from_irect (&rect, &bbox);
880 ctm = pagectm (page);
881 fz_run_display_list (page->dlist, &dev, &ctm, &rect, NULL);
882 return obs.cured;
883 }
884 #define OBSCURED obscured
885 #else
886 #define OBSCURED(a, b) 0
887 #endif
888
889 static struct tile *rendertile (struct page *page, int x, int y, int w, int h,
890 struct pbo *pbo)
891 {
892 fz_rect rect;
893 fz_irect bbox;
894 fz_matrix ctm;
895 fz_device *dev;
896 struct tile *tile;
897 struct pagedim *pdim;
898
899 tile = alloctile (h);
900 pdim = &state.pagedims[page->pdimno];
901
902 bbox = pdim->bounds;
903 bbox.x0 += x;
904 bbox.y0 += y;
905 bbox.x1 = bbox.x0 + w;
906 bbox.y1 = bbox.y0 + h;
907
908 if (state.pig) {
909 if (state.pig->w == w
910 && state.pig->h == h
911 && state.pig->colorspace == state.colorspace) {
912 tile->pixmap = state.pig;
913 tile->pixmap->x = bbox.x0;
914 tile->pixmap->y = bbox.y0;
915 }
916 else {
917 fz_drop_pixmap (state.ctx, state.pig);
918 }
919 state.pig = NULL;
920 }
921 if (!tile->pixmap) {
922 if (pbo) {
923 tile->pixmap =
924 fz_new_pixmap_with_bbox_and_data (state.ctx, state.colorspace,
925 &bbox, pbo->ptr);
926 tile->pbo = pbo;
927 }
928 else {
929 tile->pixmap =
930 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, &bbox);
931 }
932 }
933
934 tile->w = w;
935 tile->h = h;
936 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
937 clearpixmap (tile->pixmap);
938 }
939 dev = fz_new_draw_device (state.ctx, tile->pixmap);
940 ctm = pagectm (page);
941 fz_rect_from_irect (&rect, &bbox);
942 fz_run_display_list (page->dlist, dev, &ctm, &rect, NULL);
943 fz_free_device (dev);
944
945 return tile;
946 }
947
948 #ifdef SUMATRA_LOOKUP
949 /* Following two functions are taken (almost) verbatim from SumatraPDF
950 PdfEngine.cpp
951 */
952 static void
953 pdf_load_page_objs_rec(pdf_document *doc, pdf_obj *node, int *page_no, pdf_obj **page_objs)
954 {
955 fz_context *ctx = doc->ctx;
956
957 if (pdf_mark_obj(node))
958 fz_throw(ctx, FZ_ERROR_GENERIC, "cycle in page tree");
959
960 fz_try(ctx) {
961 pdf_obj *kids = pdf_dict_gets(node, "Kids");
962 int len = pdf_array_len(kids), i;
963 for (i = 0; i < len; i++) {
964 pdf_obj *kid = pdf_array_get(kids, i);
965 char *type = pdf_to_name(pdf_dict_gets(kid, "Type"));
966 if (!strcmp(type, "Page")) {
967 if (*page_no > pdf_count_pages(doc))
968 fz_throw(ctx, FZ_ERROR_GENERIC, "found more /Page objects than anticipated");
969 page_objs[*page_no - 1] = pdf_keep_obj(kid);
970 (*page_no)++;
971 }
972 else if (!strcmp(type, "Pages")) {
973 int count = pdf_to_int(pdf_dict_gets(kid, "Count"));
974 if (count > 0)
975 pdf_load_page_objs_rec(doc, kid, page_no, page_objs);
976 }
977 else {
978 fz_warn(ctx, "non-page object in page tree (%s)", type);
979 }
980 }
981 }
982 fz_always(ctx) {
983 pdf_unmark_obj(node);
984 }
985 fz_catch(ctx) {
986 fz_rethrow(ctx);
987 }
988 }
989
990 static void
991 pdf_load_page_objs(pdf_document *doc, pdf_obj **page_objs)
992 {
993 pdf_obj *pages = pdf_dict_getp(pdf_trailer(doc), "Root/Pages");
994 int page_no = 1;
995 pdf_load_page_objs_rec(doc, pages, &page_no, page_objs);
996 }
997 #endif
998
999 static void initpdims (void)
1000 {
1001 double start, end;
1002 FILE *trimf = NULL;
1003 fz_rect rootmediabox;
1004 int pageno, trim, show;
1005 int trimw = 0, cxcount;
1006
1007 start = now ();
1008
1009 if (state.trimmargins && state.trimcachepath) {
1010 trimf = fopen (state.trimcachepath, "rb");
1011 if (!trimf) {
1012 trimf = fopen (state.trimcachepath, "wb");
1013 trimw = 1;
1014 }
1015 }
1016
1017 if (state.trimmargins || state.type == DPDF || !state.cxack)
1018 cxcount = state.pagecount;
1019 else
1020 cxcount = MIN (state.pagecount, 1);
1021
1022 if (state.type == DPDF) {
1023 pdf_obj *obj;
1024 obj = pdf_dict_getp (pdf_trailer (state.u.pdf),
1025 "Root/Pages/MediaBox");
1026 pdf_to_rect (state.ctx, obj, &rootmediabox);
1027 }
1028
1029 #ifdef SUMATRA_LOOKUP
1030 if (state.type == DPDF
1031 && (!state.pdflut.objs || state.pdflut.pdf != state.u.pdf)) {
1032 state.pdflut.objs = malloc (sizeof (*state.pdflut.objs) * cxcount);
1033 if (!state.pdflut.objs) {
1034 err (1, "malloc pageobjs %zu %d %zu failed",
1035 sizeof (*state.pdflut.objs), cxcount,
1036 sizeof (*state.pdflut.objs) * cxcount);
1037 }
1038 state.pdflut.count = cxcount;
1039 pdf_load_page_objs (state.u.pdf, state.pdflut.objs);
1040 state.pdflut.pdf = state.u.pdf;
1041 }
1042 #endif
1043
1044 for (pageno = 0; pageno < cxcount; ++pageno) {
1045 int rotate = 0;
1046 struct pagedim *p;
1047 fz_rect mediabox;
1048
1049 switch (state.type) {
1050 case DPDF: {
1051 pdf_document *pdf = state.u.pdf;
1052 pdf_obj *pageref, *pageobj;
1053
1054 #ifdef SUMATRA_LOOKUP
1055 pageref = state.pdflut.objs[pageno];
1056 #else
1057 pageref = pdf_lookup_page_obj (pdf, pageno);
1058 #endif
1059 pageobj = pdf_resolve_indirect (pageref);
1060
1061 if (state.trimmargins) {
1062 pdf_obj *obj;
1063 pdf_page *page;
1064
1065 fz_try (state.ctx) {
1066 page = pdf_load_page (pdf, pageno);
1067 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
1068 trim = state.trimanew || !obj;
1069 if (trim) {
1070 fz_rect rect;
1071 fz_matrix ctm;
1072 fz_device *dev;
1073
1074 dev = fz_new_bbox_device (state.ctx, &rect);
1075 dev->hints |= FZ_IGNORE_SHADE;
1076 fz_invert_matrix (&ctm, &page->ctm);
1077 pdf_run_page (pdf, page, dev, &fz_identity, NULL);
1078 fz_free_device (dev);
1079
1080 rect.x0 += state.trimfuzz.x0;
1081 rect.x1 += state.trimfuzz.x1;
1082 rect.y0 += state.trimfuzz.y0;
1083 rect.y1 += state.trimfuzz.y1;
1084 fz_transform_rect (&rect, &ctm);
1085 fz_intersect_rect (&rect, &page->mediabox);
1086
1087 if (fz_is_empty_rect (&rect)) {
1088 mediabox = page->mediabox;
1089 }
1090 else {
1091 mediabox = rect;
1092 }
1093
1094 obj = pdf_new_array (pdf, 4);
1095 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x0));
1096 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y0));
1097 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x1));
1098 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y1));
1099 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
1100 }
1101 else {
1102 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
1103 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
1104 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
1105 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
1106 }
1107
1108 rotate = page->rotate;
1109 pdf_free_page (pdf, page);
1110
1111 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
1112 if (show) {
1113 printd ("progress %f Trimming %d",
1114 (double) (pageno + 1) / state.pagecount,
1115 pageno + 1);
1116 }
1117 }
1118 fz_catch (state.ctx) {
1119 fprintf (stderr, "failed to load page %d\n", pageno+1);
1120 }
1121 }
1122 else {
1123 int empty = 0;
1124 fz_rect cropbox;
1125
1126 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "MediaBox"),
1127 &mediabox);
1128 if (fz_is_empty_rect (&mediabox)) {
1129 mediabox.x0 = 0;
1130 mediabox.y0 = 0;
1131 mediabox.x1 = 612;
1132 mediabox.y1 = 792;
1133 empty = 1;
1134 }
1135
1136 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "CropBox"),
1137 &cropbox);
1138 if (!fz_is_empty_rect (&cropbox)) {
1139 if (empty) {
1140 mediabox = cropbox;
1141 }
1142 else {
1143 fz_intersect_rect (&mediabox, &cropbox);
1144 }
1145 }
1146 else {
1147 if (empty) {
1148 if (fz_is_empty_rect (&rootmediabox)) {
1149 fprintf (stderr,
1150 "cannot find page size for page %d\n",
1151 pageno+1);
1152 }
1153 else {
1154 mediabox = rootmediabox;
1155 }
1156 }
1157 }
1158 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
1159 }
1160 break;
1161 }
1162
1163 case DXPS:
1164 {
1165 xps_page *page;
1166
1167 fz_try (state.ctx) {
1168 page = xps_load_page (state.u.xps, pageno);
1169 xps_bound_page (state.u.xps, page, &mediabox);
1170 rotate = 0;
1171 if (state.trimmargins) {
1172 fz_rect rect;
1173 fz_device *dev;
1174
1175 dev = fz_new_bbox_device (state.ctx, &rect);
1176 dev->hints |= FZ_IGNORE_SHADE;
1177 xps_run_page (state.u.xps, page, dev,
1178 &fz_identity, NULL);
1179 fz_free_device (dev);
1180
1181 rect.x0 += state.trimfuzz.x0;
1182 rect.x1 += state.trimfuzz.x1;
1183 rect.y0 += state.trimfuzz.y0;
1184 rect.y1 += state.trimfuzz.y1;
1185 fz_intersect_rect (&rect, &mediabox);
1186
1187 if (!fz_is_empty_rect (&rect)) {
1188 mediabox = rect;
1189 }
1190 }
1191 xps_free_page (state.u.xps, page);
1192 if (!state.cxack) {
1193 printd ("progress %f loading %d",
1194 (double) (pageno + 1) / state.pagecount,
1195 pageno + 1);
1196 }
1197 }
1198 fz_catch (state.ctx) {
1199 }
1200 }
1201 break;
1202
1203 case DCBZ:
1204 {
1205 rotate = 0;
1206 mediabox.x0 = 0;
1207 mediabox.y0 = 0;
1208 mediabox.x1 = 900;
1209 mediabox.y1 = 900;
1210 if (state.trimmargins && trimw) {
1211 cbz_page *page;
1212
1213 fz_try (state.ctx) {
1214 page = cbz_load_page (state.u.cbz, pageno);
1215 cbz_bound_page (state.u.cbz, page, &mediabox);
1216 cbz_free_page (state.u.cbz, page);
1217 printd ("progress %f Trimming %d",
1218 (double) (pageno + 1) / state.pagecount,
1219 pageno + 1);
1220 }
1221 fz_catch (state.ctx) {
1222 fprintf (stderr, "failed to load page %d\n", pageno+1);
1223 }
1224 if (trimf) {
1225 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
1226 if (n - 1) {
1227 err (1, "fwrite trim mediabox");
1228 }
1229 }
1230 }
1231 else {
1232 if (trimf) {
1233 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
1234 if (n - 1) {
1235 err (1, "fread trim mediabox");
1236 }
1237 }
1238 else {
1239 if (state.cxack) {
1240 cbz_page *page;
1241 fz_try (state.ctx) {
1242 page = cbz_load_page (state.u.cbz, pageno);
1243 cbz_bound_page (state.u.cbz, page, &mediabox);
1244 cbz_free_page (state.u.cbz, page);
1245 }
1246 fz_catch (state.ctx) {
1247 fprintf (stderr, "failed to load cbz page\n");
1248 }
1249 }
1250 }
1251 }
1252 }
1253 break;
1254
1255 case DIMG:
1256 {
1257 image_page *page;
1258
1259 rotate = 0;
1260 mediabox.x0 = 0;
1261 mediabox.y0 = 0;
1262 mediabox.x1 = 900;
1263 mediabox.y1 = 900;
1264
1265 fz_try (state.ctx) {
1266 page = image_load_page (state.u.img, pageno);
1267 image_bound_page (state.u.img, page, &mediabox);
1268 image_free_page (state.u.img, page);
1269 }
1270 fz_catch (state.ctx) {
1271 fprintf (stderr, "failed to load page %d\n", pageno+1);
1272 }
1273 }
1274 break;
1275
1276 default:
1277 ARSERT (0 && state.type);
1278 }
1279
1280 if (state.pagedimcount == 0
1281 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1282 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1283 size_t size;
1284
1285 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1286 state.pagedims = realloc (state.pagedims, size);
1287 if (!state.pagedims) {
1288 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1289 size, state.pagedimcount + 1);
1290 }
1291
1292 p = &state.pagedims[state.pagedimcount++];
1293 p->rotate = rotate;
1294 p->mediabox = mediabox;
1295 p->pageno = pageno;
1296 }
1297 }
1298 end = now ();
1299 if (state.trimmargins) {
1300 printd ("progress 1 Trimmed %d pages in %f seconds",
1301 state.pagecount, end - start);
1302 }
1303 else {
1304 printd ("vmsg Processed %d pages in %f seconds",
1305 state.pagecount, end - start);
1306 }
1307 state.trimanew = 0;
1308 if (trimf) {
1309 if (fclose (trimf)) {
1310 err (1, "fclose");
1311 }
1312 }
1313 }
1314
1315 static void layout (void)
1316 {
1317 int pindex;
1318 fz_rect box;
1319 fz_matrix ctm, rm;
1320 struct pagedim *p = p;
1321 double zw, w, maxw = 0.0, zoom = zoom;
1322
1323 if (state.pagedimcount == 0) return;
1324
1325 switch (state.fitmodel) {
1326 case FitProportional:
1327 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1328 double x0, x1;
1329
1330 p = &state.pagedims[pindex];
1331 fz_rotate (&rm, p->rotate + state.rotate);
1332 box = p->mediabox;
1333 fz_transform_rect (&box, &rm);
1334
1335 x0 = MIN (box.x0, box.x1);
1336 x1 = MAX (box.x0, box.x1);
1337
1338 w = x1 - x0;
1339 maxw = MAX (w, maxw);
1340 zoom = state.w / maxw;
1341 }
1342 break;
1343
1344 case FitPage:
1345 maxw = state.w;
1346 break;
1347
1348 case FitWidth:
1349 break;
1350
1351 default:
1352 ARSERT (0 && state.fitmodel);
1353 }
1354
1355 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1356 fz_rect rect;
1357 fz_matrix tm, sm;
1358
1359 p = &state.pagedims[pindex];
1360 fz_rotate (&ctm, state.rotate);
1361 fz_rotate (&rm, p->rotate + state.rotate);
1362 box = p->mediabox;
1363 fz_transform_rect (&box, &rm);
1364 w = box.x1 - box.x0;
1365 switch (state.fitmodel) {
1366 case FitProportional:
1367 p->left = ((maxw - w) * zoom) / 2.0;
1368 break;
1369 case FitPage:
1370 {
1371 double zh, h;
1372 zw = maxw / w;
1373 h = box.y1 - box.y0;
1374 zh = state.h / h;
1375 zoom = MIN (zw, zh);
1376 p->left = (maxw - (w * zoom)) / 2.0;
1377 }
1378 break;
1379 case FitWidth:
1380 p->left = 0;
1381 zoom = state.w / w;
1382 break;
1383 }
1384
1385 fz_scale (&p->zoomctm, zoom, zoom);
1386 fz_concat (&ctm, &p->zoomctm, &ctm);
1387
1388 fz_rotate (&rm, p->rotate);
1389 p->pagebox = p->mediabox;
1390 fz_transform_rect (&p->pagebox, &rm);
1391 p->pagebox.x1 -= p->pagebox.x0;
1392 p->pagebox.y1 -= p->pagebox.y0;
1393 p->pagebox.x0 = 0;
1394 p->pagebox.y0 = 0;
1395 rect = p->pagebox;
1396 fz_transform_rect (&rect, &ctm);
1397 fz_round_rect (&p->bounds, &rect);
1398 p->ctm = ctm;
1399
1400 fz_translate (&tm, 0, -p->mediabox.y1);
1401 fz_scale (&sm, zoom, -zoom);
1402 fz_concat (&ctm, &tm, &sm);
1403 fz_concat (&p->lctm, &ctm, &rm);
1404
1405 p->tctmready = 0;
1406 }
1407
1408 do {
1409 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1410 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1411 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1412 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1413 int w = x1 - x0;
1414 int h = y1 - y0;
1415
1416 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1417 } while (p-- != state.pagedims);
1418 }
1419
1420 static
1421 struct anchor { int n; int x; int y; int w; int h; }
1422 desttoanchor (fz_link_dest *dest)
1423 {
1424 int i;
1425 struct anchor a;
1426 struct pagedim *pdim = state.pagedims;
1427
1428 a.n = -1;
1429 a.x = 0;
1430 a.y = 0;
1431 for (i = 0; i < state.pagedimcount; ++i) {
1432 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1433 break;
1434 pdim = &state.pagedims[i];
1435 }
1436 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1437 fz_point p;
1438 if (dest->ld.gotor.flags & fz_link_flag_l_valid)
1439 p.x = dest->ld.gotor.lt.x;
1440 else
1441 p.x = 0.0;
1442 p.y = dest->ld.gotor.lt.y;
1443 fz_transform_point (&p, &pdim->lctm);
1444 a.x = p.x;
1445 a.y = p.y;
1446 }
1447 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1448 double x0, x1, y0, y1;
1449
1450 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1451 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1452 a.w = x1 - x0;
1453 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1454 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1455 a.h = y1 - y0;
1456 a.n = dest->ld.gotor.page;
1457 }
1458 return a;
1459 }
1460
1461 static void recurse_outline (fz_outline *outline, int level)
1462 {
1463 while (outline) {
1464 switch (outline->dest.kind) {
1465 case FZ_LINK_GOTO:
1466 {
1467 struct anchor a = desttoanchor (&outline->dest);
1468
1469 if (a.n >= 0) {
1470 printd ("o %d %d %d %d %s",
1471 level, a.n, a.y, a.h, outline->title);
1472 }
1473 }
1474 break;
1475
1476 case FZ_LINK_URI:
1477 printd ("ou %d %" FMT_s " %s %s", level,
1478 strlen (outline->title), outline->title,
1479 outline->dest.ld.uri.uri);
1480 break;
1481
1482 case FZ_LINK_NONE:
1483 printd ("on %d %s", level, outline->title);
1484 break;
1485
1486 default:
1487 printd ("emsg Unhandled outline kind %d for %s\n",
1488 outline->dest.kind, outline->title);
1489 break;
1490 }
1491 if (outline->down) {
1492 recurse_outline (outline->down, level + 1);
1493 }
1494 outline = outline->next;
1495 }
1496 }
1497
1498 static void process_outline (void)
1499 {
1500 fz_outline *outline;
1501
1502 if (!state.needoutline) return;
1503
1504 state.needoutline = 0;
1505 switch (state.type) {
1506 case DPDF:
1507 outline = pdf_load_outline (state.u.pdf);
1508 break;
1509 case DXPS:
1510 outline = xps_load_outline (state.u.xps);
1511 break;
1512 default:
1513 outline = NULL;
1514 break;
1515 }
1516 if (outline) {
1517 recurse_outline (outline, 0);
1518 fz_free_outline (state.ctx, outline);
1519 }
1520 }
1521
1522 static char *strofspan (fz_text_span *span)
1523 {
1524 char *p;
1525 char utf8[10];
1526 fz_text_char *ch;
1527 size_t size = 0, cap = 80;
1528
1529 p = malloc (cap + 1);
1530 if (!p) return NULL;
1531
1532 for (ch = span->text; ch < span->text + span->len; ++ch) {
1533 int n = fz_runetochar (utf8, ch->c);
1534 if (size + n > cap) {
1535 cap *= 2;
1536 p = realloc (p, cap + 1);
1537 if (!p) return NULL;
1538 }
1539
1540 memcpy (p + size, utf8, n);
1541 size += n;
1542 }
1543 p[size] = 0;
1544 return p;
1545 }
1546
1547 static int matchspan (regex_t *re, fz_text_page UNUSED_ATTR *page,
1548 fz_text_span *span, fz_matrix UNUSED_ATTR ctm,
1549 int stop, int pageno, double start)
1550 {
1551 int ret;
1552 char *p;
1553 regmatch_t rm;
1554 int a, b, c;
1555 fz_rect sb, eb;
1556 fz_point p1, p2, p3, p4;
1557
1558 p = strofspan (span);
1559 if (!p) return -1;
1560
1561 ret = regexec (re, p, 1, &rm, 0);
1562 if (ret) {
1563 free (p);
1564 if (ret != REG_NOMATCH) {
1565 size_t size;
1566 char errbuf[80];
1567 size = regerror (ret, re, errbuf, sizeof (errbuf));
1568 printd ("msg regexec error `%.*s'",
1569 (int) size, errbuf);
1570 return -1;
1571 }
1572 return 0;
1573 }
1574 else {
1575 int l = span->len;
1576
1577 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1578 c += fz_runelen (span->text[a].c);
1579 }
1580 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1581 c += fz_runelen (span->text[b].c);
1582 }
1583
1584 if (fz_runelen (span->text[b].c) > 1) {
1585 b = MAX (0, b-1);
1586 }
1587
1588 fz_text_char_bbox (&sb, span, a);
1589 fz_text_char_bbox (&eb, span, b);
1590
1591 p1.x = sb.x0;
1592 p1.y = sb.y0;
1593 p2.x = eb.x1;
1594 p2.y = sb.y0;
1595 p3.x = eb.x1;
1596 p3.y = eb.y1;
1597 p4.x = sb.x0;
1598 p4.y = eb.y1;
1599
1600 if (!stop) {
1601 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1602 pageno, 1,
1603 p1.x, p1.y,
1604 p2.x, p2.y,
1605 p3.x, p3.y,
1606 p4.x, p4.y);
1607
1608 printd ("progress 1 found at %d `%.*s' in %f sec",
1609 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1610 now () - start);
1611 }
1612 else {
1613 printd ("match %d %d %f %f %f %f %f %f %f %f",
1614 pageno, 2,
1615 p1.x, p1.y,
1616 p2.x, p2.y,
1617 p3.x, p3.y,
1618 p4.x, p4.y);
1619 }
1620 free (p);
1621 return 1;
1622 }
1623 }
1624
1625 static int compareblocks (const void *l, const void *r)
1626 {
1627 fz_text_block const *ls = l;
1628 fz_text_block const* rs = r;
1629 return ls->bbox.y0 - rs->bbox.y0;
1630 }
1631
1632 /* wishful thinking function */
1633 static void search (regex_t *re, int pageno, int y, int forward)
1634 {
1635 int i, j;
1636 fz_matrix ctm;
1637 fz_device *tdev;
1638 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1639 fz_text_page *text;
1640 fz_text_sheet *sheet;
1641 struct pagedim *pdim, *pdimprev;
1642 int stop = 0, niters = 0;
1643 double start, end;
1644
1645 if (!(state.type == DPDF || state.type == DXPS))
1646 return;
1647
1648 start = now ();
1649 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1650 if (niters++ == 5) {
1651 niters = 0;
1652 if (hasdata ()) {
1653 printd ("progress 1 attention requested aborting search at %d",
1654 pageno);
1655 stop = 1;
1656 }
1657 else {
1658 printd ("progress %f searching in page %d",
1659 (double) (pageno + 1) / state.pagecount,
1660 pageno);
1661 }
1662 }
1663 pdimprev = NULL;
1664 for (i = 0; i < state.pagedimcount; ++i) {
1665 pdim = &state.pagedims[i];
1666 if (pdim->pageno == pageno) {
1667 goto found;
1668 }
1669 if (pdim->pageno > pageno) {
1670 pdim = pdimprev;
1671 goto found;
1672 }
1673 pdimprev = pdim;
1674 }
1675 pdim = pdimprev;
1676 found:
1677
1678 sheet = fz_new_text_sheet (state.ctx);
1679 text = fz_new_text_page (state.ctx);
1680 tdev = fz_new_text_device (state.ctx, sheet, text);
1681
1682 switch (state.type) {
1683 case DPDF:
1684 u.ptr = NULL;
1685 fz_try (state.ctx) {
1686 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1687 trimctm (u.pdfpage, pdim - state.pagedims);
1688 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1689 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1690 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1691 fz_end_page (tdev);
1692 }
1693 fz_catch (state.ctx) {
1694 fz_free_device (tdev);
1695 u.ptr = NULL;
1696 goto nextiter;
1697 }
1698 break;
1699
1700 case DXPS:
1701 u.xpspage = xps_load_page (state.u.xps, pageno);
1702 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1703 break;
1704
1705 default:
1706 ARSERT (0 && state.type);
1707 }
1708
1709 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1710 fz_free_device (tdev);
1711
1712 for (j = 0; j < text->len; ++j) {
1713 int k;
1714 fz_page_block *pb;
1715 fz_text_block *block;
1716
1717 pb = &text->blocks[forward ? j : text->len - 1 - j];
1718 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1719 block = pb->u.text;
1720
1721 for (k = 0; k < block->len; ++k) {
1722 fz_text_line *line;
1723 fz_text_span *span;
1724
1725 if (forward) {
1726 line = &block->lines[k];
1727 if (line->bbox.y0 < y + 1) continue;
1728 }
1729 else {
1730 line = &block->lines[block->len - 1 - k];
1731 if (line->bbox.y0 > y - 1) continue;
1732 }
1733
1734 for (span = line->first_span; span; span = span->next) {
1735 switch (matchspan (re, text, span, ctm,
1736 stop, pageno, start)) {
1737 case 0: break;
1738 case 1: stop = 1; break;
1739 case -1: stop = 1; goto endloop;
1740 }
1741 }
1742 }
1743 }
1744 nextiter:
1745 if (forward) {
1746 pageno += 1;
1747 y = 0;
1748 }
1749 else {
1750 pageno -= 1;
1751 y = INT_MAX;
1752 }
1753 endloop:
1754 fz_free_text_page (state.ctx, text);
1755 fz_free_text_sheet (state.ctx, sheet);
1756 if (u.ptr) {
1757 state.freepage (u.ptr);
1758 }
1759 }
1760 end = now ();
1761 if (!stop) {
1762 printd ("progress 1 no matches %f sec", end - start);
1763 }
1764 printd ("clearrects");
1765 }
1766
1767 static void set_tex_params (int colorspace)
1768 {
1769 union {
1770 unsigned char b;
1771 unsigned int s;
1772 } endianness = {1};
1773
1774 switch (colorspace) {
1775 case 0:
1776 state.texiform = GL_RGBA8;
1777 state.texform = GL_RGBA;
1778 state.texty = GL_UNSIGNED_BYTE;
1779 state.colorspace = fz_device_rgb (state.ctx);
1780 break;
1781 case 1:
1782 state.texiform = GL_RGBA8;
1783 state.texform = GL_BGRA;
1784 state.texty = endianness.s > 1
1785 ? GL_UNSIGNED_INT_8_8_8_8
1786 : GL_UNSIGNED_INT_8_8_8_8_REV;
1787 state.colorspace = fz_device_bgr (state.ctx);
1788 break;
1789 case 2:
1790 state.texiform = GL_LUMINANCE_ALPHA;
1791 state.texform = GL_LUMINANCE_ALPHA;
1792 state.texty = GL_UNSIGNED_BYTE;
1793 state.colorspace = fz_device_gray (state.ctx);
1794 break;
1795 default:
1796 errx (1, "invalid colorspce %d", colorspace);
1797 }
1798 }
1799
1800 static void realloctexts (int texcount)
1801 {
1802 size_t size;
1803
1804 if (texcount == state.texcount) return;
1805
1806 if (texcount < state.texcount) {
1807 glDeleteTextures (state.texcount - texcount,
1808 state.texids + texcount);
1809 }
1810
1811 size = texcount * sizeof (*state.texids);
1812 state.texids = realloc (state.texids, size);
1813 if (!state.texids) {
1814 err (1, "realloc texids %" FMT_s, size);
1815 }
1816
1817 size = texcount * sizeof (*state.texowners);
1818 state.texowners = realloc (state.texowners, size);
1819 if (!state.texowners) {
1820 err (1, "realloc texowners %" FMT_s, size);
1821 }
1822 if (texcount > state.texcount) {
1823 int i;
1824
1825 glGenTextures (texcount - state.texcount,
1826 state.texids + state.texcount);
1827 for (i = state.texcount; i < texcount; ++i) {
1828 state.texowners[i].w = -1;
1829 state.texowners[i].slice = NULL;
1830 }
1831 }
1832 state.texcount = texcount;
1833 state.texindex = 0;
1834 }
1835
1836 static char *mbtoutf8 (char *s)
1837 {
1838 char *p, *r;
1839 wchar_t *tmp;
1840 size_t i, ret, len;
1841
1842 len = mbstowcs (NULL, s, strlen (s));
1843 if (len == 0) {
1844 return s;
1845 }
1846 else {
1847 if (len == (size_t) -1) {
1848 return s;
1849 }
1850 }
1851
1852 tmp = malloc (len * sizeof (wchar_t));
1853 if (!tmp) {
1854 return s;
1855 }
1856
1857 ret = mbstowcs (tmp, s, len);
1858 if (ret == (size_t) -1) {
1859 free (tmp);
1860 return s;
1861 }
1862
1863 len = 0;
1864 for (i = 0; i < ret; ++i) {
1865 len += fz_runelen (tmp[i]);
1866 }
1867
1868 p = r = malloc (len + 1);
1869 if (!r) {
1870 free (tmp);
1871 return s;
1872 }
1873
1874 for (i = 0; i < ret; ++i) {
1875 p += fz_runetochar (p, tmp[i]);
1876 }
1877 *p = 0;
1878 free (tmp);
1879 return r;
1880 }
1881
1882 CAMLprim value ml_mbtoutf8 (value s_v)
1883 {
1884 CAMLparam1 (s_v);
1885 CAMLlocal1 (ret_v);
1886 char *s, *r;
1887
1888 s = String_val (s_v);
1889 r = mbtoutf8 (s);
1890 if (r == s) {
1891 ret_v = s_v;
1892 }
1893 else {
1894 ret_v = caml_copy_string (r);
1895 free (r);
1896 }
1897 CAMLreturn (ret_v);
1898 }
1899
1900 static void * mainloop (void UNUSED_ATTR *unused)
1901 {
1902 char *p = NULL;
1903 int len, ret, oldlen = 0;
1904
1905 for (;;) {
1906 len = readlen ();
1907 if (len == 0) {
1908 errx (1, "readlen returned 0");
1909 }
1910
1911 if (oldlen < len + 1) {
1912 p = realloc (p, len + 1);
1913 if (!p) {
1914 err (1, "realloc %d failed", len + 1);
1915 }
1916 oldlen = len + 1;
1917 }
1918 readdata (p, len);
1919 p[len] = 0;
1920
1921 if (!strncmp ("open", p, 4)) {
1922 int wthack, off, ok = 0;
1923 char *password;
1924 char *filename;
1925 char *utf8filename;
1926 size_t filenamelen;
1927
1928 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1929 if (ret != 2) {
1930 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1931 }
1932
1933 filename = p + 5 + off;
1934 filenamelen = strlen (filename);
1935 password = filename + filenamelen + 1;
1936
1937 lock ("open");
1938 fz_try (state.ctx) {
1939 openxref (filename, password);
1940 ok = 1;
1941 }
1942 fz_catch (state.ctx) {
1943 utf8filename = mbtoutf8 (filename);
1944 printd ("msg Could not open %s", utf8filename);
1945 }
1946 if (ok) {
1947 pdfinfo ();
1948 initpdims ();
1949 }
1950 unlock ("open");
1951
1952 if (ok) {
1953 if (!wthack) {
1954 utf8filename = mbtoutf8 (filename);
1955 printd ("msg Opened %s (press h/F1 to get help)",
1956 utf8filename);
1957 if (utf8filename != filename) {
1958 free (utf8filename);
1959 }
1960 }
1961 state.needoutline = 1;
1962 }
1963 }
1964 else if (!strncmp ("cs", p, 2)) {
1965 int i, colorspace;
1966
1967 ret = sscanf (p + 2, " %d", &colorspace);
1968 if (ret != 1) {
1969 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1970 }
1971 lock ("cs");
1972 set_tex_params (colorspace);
1973 for (i = 0; i < state.texcount; ++i) {
1974 state.texowners[i].w = -1;
1975 state.texowners[i].slice = NULL;
1976 }
1977 unlock ("cs");
1978 }
1979 else if (!strncmp ("freepage", p, 8)) {
1980 void *ptr;
1981
1982 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1983 if (ret != 1) {
1984 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1985 }
1986 freepage (ptr);
1987 }
1988 else if (!strncmp ("freetile", p, 8)) {
1989 void *ptr;
1990
1991 ret = sscanf (p + 8, " %" SCN_ptr, SCN_ptr_cast (&ptr));
1992 if (ret != 1) {
1993 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1994 }
1995 freetile (ptr);
1996 }
1997 else if (!strncmp ("search", p, 6)) {
1998 int icase, pageno, y, len2, forward;
1999 char *pattern;
2000 regex_t re;
2001
2002 ret = sscanf (p + 6, " %d %d %d %d,%n",
2003 &icase, &pageno, &y, &forward, &len2);
2004 if (ret != 4) {
2005 errx (1, "malformed search `%s' ret=%d", p, ret);
2006 }
2007
2008 pattern = p + 6 + len2;
2009 ret = regcomp (&re, pattern,
2010 REG_EXTENDED | (icase ? REG_ICASE : 0));
2011 if (ret) {
2012 char errbuf[80];
2013 size_t size;
2014
2015 size = regerror (ret, &re, errbuf, sizeof (errbuf));
2016 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
2017 }
2018 else {
2019 search (&re, pageno, y, forward);
2020 regfree (&re);
2021 }
2022 }
2023 else if (!strncmp ("geometry", p, 8)) {
2024 int w, h, fitmodel;
2025
2026 printd ("clear");
2027 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
2028 if (ret != 3) {
2029 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
2030 }
2031
2032 lock ("geometry");
2033 state.h = h;
2034 if (w != state.w) {
2035 int i;
2036 state.w = w;
2037 for (i = 0; i < state.texcount; ++i) {
2038 state.texowners[i].slice = NULL;
2039 }
2040 }
2041 state.fitmodel = fitmodel;
2042 layout ();
2043 process_outline ();
2044
2045 state.gen++;
2046 unlock ("geometry");
2047 printd ("continue %d", state.pagecount);
2048 }
2049 else if (!strncmp ("reqlayout", p, 9)) {
2050 char *nameddest;
2051 int rotate, off, h;
2052 unsigned int fitmodel;
2053
2054 printd ("clear");
2055 ret = sscanf (p + 9, " %d %u %d %n",
2056 &rotate, &fitmodel, &h, &off);
2057 if (ret != 3) {
2058 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
2059 }
2060 lock ("reqlayout");
2061 if (state.rotate != rotate || state.fitmodel != fitmodel) {
2062 state.gen += 1;
2063 }
2064 state.rotate = rotate;
2065 state.fitmodel = fitmodel;
2066 state.h = h;
2067 layout ();
2068 process_outline ();
2069
2070 nameddest = p + 9 + off;
2071 if (state.type == DPDF && nameddest && *nameddest) {
2072 struct anchor a;
2073 fz_link_dest dest;
2074 pdf_obj *needle, *obj;
2075
2076 needle = pdf_new_string (state.u.pdf, nameddest,
2077 strlen (nameddest));
2078 obj = pdf_lookup_dest (state.u.pdf, needle);
2079 if (obj) {
2080 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
2081
2082 a = desttoanchor (&dest);
2083 if (a.n >= 0) {
2084 printd ("a %d %d %d", a.n, a.x, a.y);
2085 }
2086 else {
2087 printd ("emsg failed to parse destination `%s'\n",
2088 nameddest);
2089 }
2090 }
2091 else {
2092 printd ("emsg destination `%s' not found\n",
2093 nameddest);
2094 }
2095 pdf_drop_obj (needle);
2096 }
2097
2098 state.gen++;
2099 unlock ("reqlayout");
2100 printd ("continue %d", state.pagecount);
2101 }
2102 else if (!strncmp ("page", p, 4)) {
2103 double a, b;
2104 struct page *page;
2105 int pageno, pindex;
2106
2107 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
2108 if (ret != 2) {
2109 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
2110 }
2111
2112 lock ("page");
2113 a = now ();
2114 page = loadpage (pageno, pindex);
2115 b = now ();
2116 unlock ("page");
2117
2118 printd ("page %" FMT_ptr " %f", FMT_ptr_cast (page), b - a);
2119 }
2120 else if (!strncmp ("tile", p, 4)) {
2121 int x, y, w, h;
2122 struct page *page;
2123 struct tile *tile;
2124 double a, b;
2125 void *data;
2126
2127 ret = sscanf (p + 4, " %" SCN_ptr " %d %d %d %d %" SCN_ptr,
2128 SCN_ptr_cast (&page), &x, &y, &w, &h,
2129 SCN_ptr_cast (&data));
2130 if (ret != 6) {
2131 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2132 }
2133
2134 lock ("tile");
2135 a = now ();
2136 tile = rendertile (page, x, y, w, h, data);
2137 b = now ();
2138 unlock ("tile");
2139
2140 printd ("tile %d %d %" FMT_ptr " %u %f",
2141 x, y,
2142 FMT_ptr_cast (tile),
2143 tile->w * tile->h * tile->pixmap->n,
2144 b - a);
2145 }
2146 else if (!strncmp ("settrim", p, 7)) {
2147 fz_irect fuzz;
2148 int trimmargins;
2149
2150 ret = sscanf (p + 7, " %d %d %d %d %d",
2151 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2152 if (ret != 5) {
2153 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2154 }
2155 printd ("clear");
2156 lock ("settrim");
2157 state.trimmargins = trimmargins;
2158 state.needoutline = 1;
2159 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2160 state.trimanew = 1;
2161 state.trimfuzz = fuzz;
2162 }
2163 state.pagedimcount = 0;
2164 free (state.pagedims);
2165 state.pagedims = NULL;
2166 initpdims ();
2167 layout ();
2168 process_outline ();
2169 unlock ("settrim");
2170 printd ("continue %d", state.pagecount);
2171 }
2172 else if (!strncmp ("sliceh", p, 6)) {
2173 int h;
2174
2175 ret = sscanf (p + 6, " %d", &h);
2176 if (ret != 1) {
2177 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2178 }
2179 if (h != state.sliceheight) {
2180 int i;
2181
2182 state.sliceheight = h;
2183 for (i = 0; i < state.texcount; ++i) {
2184 state.texowners[i].w = -1;
2185 state.texowners[i].h = -1;
2186 state.texowners[i].slice = NULL;
2187 }
2188 }
2189 }
2190 else if (!strncmp ("interrupt", p, 9)) {
2191 printd ("vmsg interrupted");
2192 }
2193 else {
2194 errx (1, "unknown command %.*s", len, p);
2195 }
2196 }
2197 return 0;
2198 }
2199
2200 CAMLprim value ml_realloctexts (value texcount_v)
2201 {
2202 CAMLparam1 (texcount_v);
2203 int ok;
2204
2205 if (trylock ("ml_realloctexts")) {
2206 ok = 0;
2207 goto done;
2208 }
2209 realloctexts (Int_val (texcount_v));
2210 ok = 1;
2211 unlock ("ml_realloctexts");
2212
2213 done:
2214 CAMLreturn (Val_bool (ok));
2215 }
2216
2217 static void recti (int x0, int y0, int x1, int y1)
2218 {
2219 GLfloat *v = state.vertices;
2220
2221 glVertexPointer (2, GL_FLOAT, 0, v);
2222 v[0] = x0; v[1] = y0;
2223 v[2] = x1; v[3] = y0;
2224 v[4] = x0; v[5] = y1;
2225 v[6] = x1; v[7] = y1;
2226 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2227 }
2228
2229 static void showsel (struct page *page, int ox, int oy)
2230 {
2231 int seen = 0;
2232 fz_irect bbox;
2233 fz_rect rect;
2234 fz_text_line *line;
2235 fz_page_block *pageb;
2236 fz_text_block *block;
2237 struct mark first, last;
2238 unsigned char selcolor[] = {15,15,15,140};
2239
2240 first = page->fmark;
2241 last = page->lmark;
2242
2243 if (!first.span || !last.span) return;
2244
2245 glEnable (GL_BLEND);
2246 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2247 glColor4ubv (selcolor);
2248
2249 ox += state.pagedims[page->pdimno].bounds.x0;
2250 oy += state.pagedims[page->pdimno].bounds.y0;
2251 for (pageb = page->text->blocks;
2252 pageb < page->text->blocks + page->text->len;
2253 ++pageb) {
2254 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2255 block = pageb->u.text;
2256
2257 for (line = block->lines;
2258 line < block->lines + block->len;
2259 ++line) {
2260 fz_text_span *span;
2261 rect = fz_empty_rect;
2262
2263 for (span = line->first_span; span; span = span->next) {
2264 int i, j, k;
2265 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2266
2267 j = 0;
2268 k = span->len - 1;
2269
2270 if (span == page->fmark.span && span == page->lmark.span) {
2271 seen = 1;
2272 j = MIN (first.i, last.i);
2273 k = MAX (first.i, last.i);
2274 }
2275 else {
2276 if (span == first.span) {
2277 seen = 1;
2278 j = first.i;
2279 }
2280 else if (span == last.span) {
2281 seen = 1;
2282 k = last.i;
2283 }
2284 }
2285
2286 if (seen) {
2287 for (i = j; i <= k; ++i) {
2288 fz_rect bbox;
2289 fz_union_rect (&rect,
2290 fz_text_char_bbox (&bbox, span, i));
2291 }
2292 fz_round_rect (&bbox, &rect);
2293 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2294 bbox.x0,
2295 bbox.y0,
2296 bbox.x1,
2297 bbox.y1,
2298 oy, ox);
2299
2300 recti (bbox.x0 + ox, bbox.y0 + oy,
2301 bbox.x1 + ox, bbox.y1 + oy);
2302 if (span == last.span) {
2303 goto done;
2304 }
2305 rect = fz_empty_rect;
2306 }
2307 }
2308 }
2309 }
2310 done:
2311 glDisable (GL_BLEND);
2312 }
2313
2314 #include "glfont.c"
2315
2316 static void highlightlinks (struct page *page, int xoff, int yoff)
2317 {
2318 fz_matrix ctm, tm, pm;
2319 fz_link *link, *links;
2320 GLfloat *texcoords = state.texcoords;
2321 GLfloat *vertices = state.vertices;
2322
2323 switch (page->type) {
2324 case DPDF:
2325 links = page->u.pdfpage->links;
2326 break;
2327
2328 case DXPS:
2329 links = page->u.xpspage->links;
2330 break;
2331
2332 default:
2333 return;
2334 }
2335
2336 glEnable (GL_TEXTURE_1D);
2337 glEnable (GL_BLEND);
2338 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2339 glBindTexture (GL_TEXTURE_1D, state.stid);
2340
2341 xoff -= state.pagedims[page->pdimno].bounds.x0;
2342 yoff -= state.pagedims[page->pdimno].bounds.y0;
2343 fz_translate (&tm, xoff, yoff);
2344 pm = pagectm (page);
2345 fz_concat (&ctm, &pm, &tm);
2346
2347 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2348 glVertexPointer (2, GL_FLOAT, 0, vertices);
2349
2350 for (link = links; link; link = link->next) {
2351 fz_point p1, p2, p3, p4;
2352
2353 p1.x = link->rect.x0;
2354 p1.y = link->rect.y0;
2355
2356 p2.x = link->rect.x1;
2357 p2.y = link->rect.y0;
2358
2359 p3.x = link->rect.x1;
2360 p3.y = link->rect.y1;
2361
2362 p4.x = link->rect.x0;
2363 p4.y = link->rect.y1;
2364
2365 fz_transform_point (&p1, &ctm);
2366 fz_transform_point (&p2, &ctm);
2367 fz_transform_point (&p3, &ctm);
2368 fz_transform_point (&p4, &ctm);
2369
2370 switch (link->dest.kind) {
2371 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2372 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2373 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2374 default: glColor3ub (0, 0, 0); break;
2375 }
2376
2377 {
2378 float w, h, s, t;
2379
2380 w = p2.x - p1.x;
2381 h = p2.y - p1.y;
2382 t = sqrtf (w*w + h*h) * .25f;
2383
2384 w = p3.x - p2.x;
2385 h = p3.y - p2.y;
2386 s = sqrtf (w*w + h*h) * .25f;
2387
2388 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2389 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2390
2391 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2392 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2393
2394 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2395 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2396
2397 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2398 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2399 }
2400 glDrawArrays (GL_LINES, 0, 8);
2401 }
2402
2403 glDisable (GL_BLEND);
2404 glDisable (GL_TEXTURE_1D);
2405 }
2406
2407 static int compareslinks (const void *l, const void *r)
2408 {
2409 struct slink const *ls = l;
2410 struct slink const *rs = r;
2411 if (ls->bbox.y0 == rs->bbox.y0) {
2412 return rs->bbox.x0 - rs->bbox.x0;
2413 }
2414 return ls->bbox.y0 - rs->bbox.y0;
2415 }
2416
2417 static void droptext (struct page *page)
2418 {
2419 if (page->text) {
2420 fz_free_text_page (state.ctx, page->text);
2421 page->fmark.i = -1;
2422 page->lmark.i = -1;
2423 page->fmark.span = NULL;
2424 page->lmark.span = NULL;
2425 page->text = NULL;
2426 }
2427 if (page->sheet) {
2428 fz_free_text_sheet (state.ctx, page->sheet);
2429 page->sheet = NULL;
2430 }
2431 }
2432
2433 static void dropslinks (struct page *page)
2434 {
2435 if (page->slinks) {
2436 free (page->slinks);
2437 page->slinks = NULL;
2438 page->slinkcount = 0;
2439 }
2440 }
2441
2442 static void ensureslinks (struct page *page)
2443 {
2444 fz_matrix ctm;
2445 int i, count = 0;
2446 size_t slinksize = sizeof (*page->slinks);
2447 fz_link *link, *links;
2448
2449 if (state.gen != page->sgen) {
2450 dropslinks (page);
2451 page->sgen = state.gen;
2452 }
2453 if (page->slinks) return;
2454
2455 switch (page->type) {
2456 case DPDF:
2457 links = page->u.pdfpage->links;
2458 trimctm (page->u.pdfpage, page->pdimno);
2459 fz_concat (&ctm,
2460 &state.pagedims[page->pdimno].tctm,
2461 &state.pagedims[page->pdimno].ctm);
2462 break;
2463
2464 case DXPS:
2465 links = page->u.xpspage->links;
2466 ctm = state.pagedims[page->pdimno].ctm;
2467 break;
2468
2469 default:
2470 return;
2471 }
2472
2473 for (link = links; link; link = link->next) {
2474 count++;
2475 }
2476 if (count > 0) {
2477 page->slinkcount = count;
2478 page->slinks = calloc (count, slinksize);
2479 if (!page->slinks) {
2480 err (1, "realloc slinks %d", count);
2481 }
2482
2483 for (i = 0, link = links; link; ++i, link = link->next) {
2484 fz_rect rect;
2485
2486 rect = link->rect;
2487 fz_transform_rect (&rect, &ctm);
2488 page->slinks[i].link = link;
2489 fz_round_rect (&page->slinks[i].bbox, &rect);
2490 }
2491 qsort (page->slinks, count, slinksize, compareslinks);
2492 }
2493 }
2494
2495 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2496 static void fmt_linkn (char *s, unsigned int u)
2497 {
2498 unsigned int len; unsigned int q;
2499 unsigned int zma = 'z' - 'a' + 1;
2500 len = 1; q = u;
2501 while (q > zma - 1) { ++len; q /= zma; }
2502 if (s) {
2503 s += len;
2504 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2505 /* handles u == 0 */
2506 }
2507 s[len] = 0;
2508 }
2509
2510 static void highlightslinks (struct page *page, int xoff, int yoff,
2511 int noff, char *targ, int tlen, int hfsize)
2512 {
2513 int i;
2514 char buf[40];
2515 struct slink *slink;
2516 double x0, y0, x1, y1, w;
2517
2518 ensureslinks (page);
2519 glColor3ub (0xc3, 0xb0, 0x91);
2520 for (i = 0; i < page->slinkcount; ++i) {
2521 fmt_linkn (buf, i + noff);
2522 if (!tlen || !strncmp (targ, buf, tlen)) {
2523 slink = &page->slinks[i];
2524
2525 x0 = slink->bbox.x0 + xoff - 5;
2526 y1 = slink->bbox.y0 + yoff - 5;
2527 y0 = y1 + 10 + hfsize;
2528 w = measure_string (state.face, hfsize, buf);
2529 x1 = x0 + w + 10;
2530 recti (x0, y0, x1, y1);
2531 }
2532 }
2533
2534 glEnable (GL_BLEND);
2535 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2536 glEnable (GL_TEXTURE_2D);
2537 glColor3ub (0, 0, 0);
2538 for (i = 0; i < page->slinkcount; ++i) {
2539 fmt_linkn (buf, i + noff);
2540 if (!tlen || !strncmp (targ, buf, tlen)) {
2541 slink = &page->slinks[i];
2542
2543 x0 = slink->bbox.x0 + xoff;
2544 y0 = slink->bbox.y0 + yoff + hfsize;
2545 draw_string (state.face, hfsize, x0, y0, buf);
2546 }
2547 }
2548 glDisable (GL_TEXTURE_2D);
2549 glDisable (GL_BLEND);
2550 }
2551
2552 static void uploadslice (struct tile *tile, struct slice *slice)
2553 {
2554 int offset;
2555 struct slice *slice1;
2556 unsigned char *texdata;
2557
2558 offset = 0;
2559 for (slice1 = tile->slices; slice != slice1; slice1++) {
2560 offset += slice1->h * tile->w * tile->pixmap->n;
2561 }
2562 if (slice->texindex != -1 && slice->texindex < state.texcount
2563 && state.texowners[slice->texindex].slice == slice) {
2564 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2565 }
2566 else {
2567 int subimage = 0;
2568 int texindex = state.texindex++ % state.texcount;
2569
2570 if (state.texowners[texindex].w == tile->w) {
2571 if (state.texowners[texindex].h >= slice->h) {
2572 subimage = 1;
2573 }
2574 else {
2575 state.texowners[texindex].h = slice->h;
2576 }
2577 }
2578 else {
2579 state.texowners[texindex].h = slice->h;
2580 }
2581
2582 state.texowners[texindex].w = tile->w;
2583 state.texowners[texindex].slice = slice;
2584 slice->texindex = texindex;
2585
2586 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2587 if (tile->pbo) {
2588 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2589 texdata = 0;
2590 }
2591 else {
2592 texdata = tile->pixmap->samples;
2593 }
2594 if (subimage) {
2595 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2596 0,
2597 0,
2598 0,
2599 tile->w,
2600 slice->h,
2601 state.texform,
2602 state.texty,
2603 texdata+offset
2604 );
2605 }
2606 else {
2607 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2608 0,
2609 state.texiform,
2610 tile->w,
2611 slice->h,
2612 0,
2613 state.texform,
2614 state.texty,
2615 texdata+offset
2616 );
2617 }
2618 if (tile->pbo) {
2619 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2620 }
2621 }
2622 }
2623
2624 CAMLprim value ml_begintiles (value unit_v)
2625 {
2626 CAMLparam1 (unit_v);
2627 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2628 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2629 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2630 CAMLreturn (unit_v);
2631 }
2632
2633 CAMLprim value ml_endtiles (value unit_v)
2634 {
2635 CAMLparam1 (unit_v);
2636 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2637 CAMLreturn (unit_v);
2638 }
2639
2640 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2641 {
2642 CAMLparam2 (args_v, ptr_v);
2643 int dispx = Int_val (Field (args_v, 0));
2644 int dispy = Int_val (Field (args_v, 1));
2645 int dispw = Int_val (Field (args_v, 2));
2646 int disph = Int_val (Field (args_v, 3));
2647 int tilex = Int_val (Field (args_v, 4));
2648 int tiley = Int_val (Field (args_v, 5));
2649 char *s = String_val (ptr_v);
2650 struct tile *tile = parse_pointer ("ml_drawtile", s);
2651 int slicey, firstslice;
2652 struct slice *slice;
2653 GLfloat *texcoords = state.texcoords;
2654 GLfloat *vertices = state.vertices;
2655
2656 firstslice = tiley / tile->sliceheight;
2657 slice = &tile->slices[firstslice];
2658 slicey = tiley % tile->sliceheight;
2659
2660 while (disph > 0) {
2661 int dh;
2662
2663 dh = slice->h - slicey;
2664 dh = MIN (disph, dh);
2665 uploadslice (tile, slice);
2666
2667 texcoords[0] = tilex; texcoords[1] = slicey;
2668 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2669 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2670 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2671
2672 vertices[0] = dispx; vertices[1] = dispy;
2673 vertices[2] = dispx+dispw; vertices[3] = dispy;
2674 vertices[4] = dispx; vertices[5] = dispy+dh;
2675 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2676
2677 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2678 dispy += dh;
2679 disph -= dh;
2680 slice++;
2681 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2682 slicey = 0;
2683 }
2684 CAMLreturn (Val_unit);
2685 }
2686
2687 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2688 value xoff_v, value yoff_v,
2689 value li_v)
2690 {
2691 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2692 int xoff = Int_val (xoff_v);
2693 int yoff = Int_val (yoff_v);
2694 int noff = Int_val (Field (li_v, 0));
2695 char *targ = String_val (Field (li_v, 1));
2696 int tlen = caml_string_length (Field (li_v, 1));
2697 int hfsize = Int_val (Field (li_v, 2));
2698 char *s = String_val (ptr_v);
2699 int hlmask = Int_val (hlinks_v);
2700 struct page *page = parse_pointer ("ml_postprocess", s);
2701
2702 if (!page->u.ptr) {
2703 /* deal with loadpage failed pages */
2704 goto done;
2705 }
2706
2707 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2708 if (trylock ("ml_postprocess")) {
2709 noff = 0;
2710 goto done;
2711 }
2712 if (hlmask & 2) {
2713 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2714 noff = page->slinkcount;
2715 }
2716 if (page->tgen == state.gen) {
2717 showsel (page, xoff, yoff);
2718 }
2719 unlock ("ml_postprocess");
2720
2721 done:
2722 CAMLreturn (Val_int (noff));
2723 }
2724
2725 static fz_link *getlink (struct page *page, int x, int y)
2726 {
2727 fz_point p;
2728 fz_matrix ctm;
2729 const fz_matrix *tctm;
2730 fz_link *link, *links;
2731
2732 switch (page->type) {
2733 case DPDF:
2734 trimctm (page->u.pdfpage, page->pdimno);
2735 tctm = &state.pagedims[page->pdimno].tctm;
2736 links = page->u.pdfpage->links;
2737 break;
2738
2739 case DXPS:
2740 tctm = &fz_identity;
2741 links = page->u.xpspage->links;
2742 break;
2743
2744 default:
2745 return NULL;
2746 }
2747 p.x = x;
2748 p.y = y;
2749
2750 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2751 fz_invert_matrix (&ctm, &ctm);
2752 fz_transform_point (&p, &ctm);
2753
2754 for (link = links; link; link = link->next) {
2755 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2756 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2757 return link;
2758 }
2759 }
2760 }
2761 return NULL;
2762 }
2763
2764 static void ensuretext (struct page *page)
2765 {
2766 if (state.gen != page->tgen) {
2767 droptext (page);
2768 page->tgen = state.gen;
2769 }
2770 if (!page->text) {
2771 fz_matrix ctm;
2772 fz_device *tdev;
2773
2774 page->text = fz_new_text_page (state.ctx);
2775 page->sheet = fz_new_text_sheet (state.ctx);
2776 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2777 ctm = pagectm (page);
2778 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2779 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2780 qsort (page->text->blocks, page->text->len,
2781 sizeof (*page->text->blocks), compareblocks);
2782 fz_end_page (tdev);
2783 fz_free_device (tdev);
2784 }
2785 }
2786
2787 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2788 {
2789 CAMLparam2 (start_page_v, dir_v);
2790 CAMLlocal1 (ret_v);
2791 int i, dir = Int_val (dir_v);
2792 int start_page = Int_val (start_page_v);
2793 int end_page = dir > 0 ? state.pagecount : -1;
2794
2795 ret_v = Val_int (0);
2796 if (!(state.type == DPDF || state.type == DXPS)) {
2797 goto done;
2798 }
2799
2800 lock ("ml_findpage_with_links");
2801 for (i = start_page + dir; i != end_page; i += dir) {
2802 int found;
2803
2804 switch (state.type) {
2805 case DPDF:
2806 {
2807 pdf_page *page = NULL;
2808
2809 fz_try (state.ctx) {
2810 page = pdf_load_page (state.u.pdf, i);
2811 found = !!page->links;
2812 }
2813 fz_catch (state.ctx) {
2814 found = 0;
2815 }
2816 if (page) {
2817 freepdfpage (page);
2818 }
2819 }
2820 break;
2821 case DXPS:
2822 {
2823 xps_page *page = xps_load_page (state.u.xps, i);
2824 found = !!page->links;
2825 freexpspage (page);
2826 }
2827 break;
2828
2829 default:
2830 ARSERT (0 && "invalid document type");
2831 }
2832
2833 if (found) {
2834 ret_v = caml_alloc_small (1, 1);
2835 Field (ret_v, 0) = Val_int (i);
2836 goto unlock;
2837 }
2838 }
2839 unlock:
2840 unlock ("ml_findpage_with_links");
2841
2842 done:
2843 CAMLreturn (ret_v);
2844 }
2845
2846 enum { dir_first, dir_last };
2847 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2848
2849 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2850 {
2851 CAMLparam2 (ptr_v, dir_v);
2852 CAMLlocal2 (ret_v, pos_v);
2853 struct page *page;
2854 int dirtag, i, slinkindex;
2855 struct slink *found = NULL ,*slink;
2856 char *s = String_val (ptr_v);
2857
2858 page = parse_pointer ("ml_findlink", s);
2859 ret_v = Val_int (0);
2860 if (trylock ("ml_findlink")) {
2861 goto done;
2862 }
2863
2864 ensureslinks (page);
2865
2866 if (Is_block (dir_v)) {
2867 dirtag = Tag_val (dir_v);
2868 switch (dirtag) {
2869 case dir_first_visible:
2870 {
2871 int x0, y0, dir, first_index, last_index;
2872
2873 pos_v = Field (dir_v, 0);
2874 x0 = Int_val (Field (pos_v, 0));
2875 y0 = Int_val (Field (pos_v, 1));
2876 dir = Int_val (Field (pos_v, 2));
2877
2878 if (dir >= 0) {
2879 dir = 1;
2880 first_index = 0;
2881 last_index = page->slinkcount;
2882 }
2883 else {
2884 first_index = page->slinkcount - 1;
2885 last_index = -1;
2886 }
2887
2888 for (i = first_index; i != last_index; i += dir) {
2889 slink = &page->slinks[i];
2890 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2891 found = slink;
2892 break;
2893 }
2894 }
2895 }
2896 break;
2897
2898 case dir_left:
2899 slinkindex = Int_val (Field (dir_v, 0));
2900 found = &page->slinks[slinkindex];
2901 for (i = slinkindex - 1; i >= 0; --i) {
2902 slink = &page->slinks[i];
2903 if (slink->bbox.x0 < found->bbox.x0) {
2904 found = slink;
2905 break;
2906 }
2907 }
2908 break;
2909
2910 case dir_right:
2911 slinkindex = Int_val (Field (dir_v, 0));
2912 found = &page->slinks[slinkindex];
2913 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2914 slink = &page->slinks[i];
2915 if (slink->bbox.x0 > found->bbox.x0) {
2916 found = slink;
2917 break;
2918 }
2919 }
2920 break;
2921
2922 case dir_down:
2923 slinkindex = Int_val (Field (dir_v, 0));
2924 found = &page->slinks[slinkindex];
2925 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2926 slink = &page->slinks[i];
2927 if (slink->bbox.y0 >= found->bbox.y0) {
2928 found = slink;
2929 break;
2930 }
2931 }
2932 break;
2933
2934 case dir_up:
2935 slinkindex = Int_val (Field (dir_v, 0));
2936 found = &page->slinks[slinkindex];
2937 for (i = slinkindex - 1; i >= 0; --i) {
2938 slink = &page->slinks[i];
2939 if (slink->bbox.y0 <= found->bbox.y0) {
2940 found = slink;
2941 break;
2942 }
2943 }
2944 break;
2945 }
2946 }
2947 else {
2948 dirtag = Int_val (dir_v);
2949 switch (dirtag) {
2950 case dir_first:
2951 found = page->slinks;
2952 break;
2953
2954 case dir_last:
2955 if (page->slinks) {
2956 found = page->slinks + (page->slinkcount - 1);
2957 }
2958 break;
2959 }
2960 }
2961 if (found) {
2962 ret_v = caml_alloc_small (2, 1);
2963 Field (ret_v, 0) = Val_int (found - page->slinks);
2964 }
2965
2966 unlock ("ml_findlink");
2967 done:
2968 CAMLreturn (ret_v);
2969 }
2970
2971 enum { uuri, ugoto, utext, uunexpected,
2972 ulaunch, unamed, uremote, uremotedest };
2973
2974 #define LINKTOVAL \
2975 { \
2976 int pageno; \
2977 \
2978 switch (link->dest.kind) { \
2979 case FZ_LINK_GOTO: \
2980 { \
2981 fz_point p; \
2982 \
2983 pageno = link->dest.ld.gotor.page; \
2984 p.x = 0; \
2985 p.y = 0; \
2986 \
2987 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2988 p.y = link->dest.ld.gotor.lt.y; \
2989 fz_transform_point (&p, &pdim->lctm); \
2990 if (p.y < 0) p.y = 0; \
2991 } \
2992 tup_v = caml_alloc_tuple (2); \
2993 ret_v = caml_alloc_small (1, ugoto); \
2994 Field (tup_v, 0) = Val_int (pageno); \
2995 Field (tup_v, 1) = Val_int (p.y); \
2996 Field (ret_v, 0) = tup_v; \
2997 } \
2998 break; \
2999 \
3000 case FZ_LINK_URI: \
3001 str_v = caml_copy_string (link->dest.ld.uri.uri); \
3002 ret_v = caml_alloc_small (1, uuri); \
3003 Field (ret_v, 0) = str_v; \
3004 break; \
3005 \
3006 case FZ_LINK_LAUNCH: \
3007 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
3008 ret_v = caml_alloc_small (1, ulaunch); \
3009 Field (ret_v, 0) = str_v; \
3010 break; \
3011 \
3012 case FZ_LINK_NAMED: \
3013 str_v = caml_copy_string (link->dest.ld.named.named); \
3014 ret_v = caml_alloc_small (1, unamed); \
3015 Field (ret_v, 0) = str_v; \
3016 break; \
3017 \
3018 case FZ_LINK_GOTOR: \
3019 { \
3020 int rty; \
3021 \
3022 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
3023 pageno = link->dest.ld.gotor.page; \
3024 if (pageno == -1) { \
3025 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
3026 rty = uremotedest; \
3027 } \
3028 else { \
3029 gr_v = Val_int (pageno); \
3030 rty = uremote; \
3031 } \
3032 tup_v = caml_alloc_tuple (2); \
3033 ret_v = caml_alloc_small (1, rty); \
3034 Field (tup_v, 0) = str_v; \
3035 Field (tup_v, 1) = gr_v; \
3036 Field (ret_v, 0) = tup_v; \
3037 } \
3038 break; \
3039 \
3040 default: \
3041 { \
3042 char buf[80]; \
3043 \
3044 snprintf (buf, sizeof (buf), \
3045 "unhandled link kind %d", link->dest.kind); \
3046 str_v = caml_copy_string (buf); \
3047 ret_v = caml_alloc_small (1, uunexpected); \
3048 Field (ret_v, 0) = str_v; \
3049 } \
3050 break; \
3051 } \
3052 }
3053
3054 CAMLprim value ml_getlink (value ptr_v, value n_v)
3055 {
3056 CAMLparam2 (ptr_v, n_v);
3057 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3058 fz_link *link;
3059 struct page *page;
3060 struct pagedim *pdim;
3061 char *s = String_val (ptr_v);
3062
3063 ret_v = Val_int (0);
3064 if (trylock ("ml_getlink")) {
3065 goto done;
3066 }
3067
3068 page = parse_pointer ("ml_getlink", s);
3069 ensureslinks (page);
3070 pdim = &state.pagedims[page->pdimno];
3071 link = page->slinks[Int_val (n_v)].link;
3072 LINKTOVAL;
3073
3074 unlock ("ml_getlink");
3075 done:
3076 CAMLreturn (ret_v);
3077 }
3078
3079 CAMLprim value ml_getlinkcount (value ptr_v)
3080 {
3081 CAMLparam1 (ptr_v);
3082 struct page *page;
3083 char *s = String_val (ptr_v);
3084
3085 page = parse_pointer ("ml_getlinkcount", s);
3086 CAMLreturn (Val_int (page->slinkcount));
3087 }
3088
3089 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
3090 {
3091 CAMLparam2 (ptr_v, n_v);
3092 CAMLlocal1 (ret_v);
3093 struct page *page;
3094 struct slink *slink;
3095 char *s = String_val (ptr_v);
3096
3097 page = parse_pointer ("ml_getlinkrect", s);
3098 ret_v = caml_alloc_tuple (4);
3099 if (trylock ("ml_getlinkrect")) {
3100 Field (ret_v, 0) = Val_int (0);
3101 Field (ret_v, 1) = Val_int (0);
3102 Field (ret_v, 2) = Val_int (0);
3103 Field (ret_v, 3) = Val_int (0);
3104 goto done;
3105 }
3106 ensureslinks (page);
3107
3108 slink = &page->slinks[Int_val (n_v)];
3109 Field (ret_v, 0) = Val_int (slink->bbox.x0);
3110 Field (ret_v, 1) = Val_int (slink->bbox.y0);
3111 Field (ret_v, 2) = Val_int (slink->bbox.x1);
3112 Field (ret_v, 3) = Val_int (slink->bbox.y1);
3113 unlock ("ml_getlinkrect");
3114
3115 done:
3116 CAMLreturn (ret_v);
3117 }
3118
3119 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3120 {
3121 CAMLparam3 (ptr_v, x_v, y_v);
3122 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3123 fz_link *link;
3124 struct page *page;
3125 char *ptr = String_val (ptr_v);
3126 int x = Int_val (x_v), y = Int_val (y_v);
3127 struct pagedim *pdim;
3128
3129 ret_v = Val_int (0);
3130 if (trylock ("ml_whatsunder")) {
3131 goto done;
3132 }
3133
3134 page = parse_pointer ("ml_whatsunder", ptr);
3135 pdim = &state.pagedims[page->pdimno];
3136 x += pdim->bounds.x0;
3137 y += pdim->bounds.y0;
3138 link = getlink (page, x, y);
3139 if (link) {
3140 LINKTOVAL;
3141 }
3142 else {
3143 fz_rect *b;
3144 fz_page_block *pageb;
3145 fz_text_block *block;
3146
3147 ensuretext (page);
3148 for (pageb = page->text->blocks;
3149 pageb < page->text->blocks + page->text->len;
3150 ++pageb) {
3151 fz_text_line *line;
3152 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3153 block = pageb->u.text;
3154
3155 b = &block->bbox;
3156 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3157 continue;
3158
3159 for (line = block->lines;
3160 line < block->lines + block->len;
3161 ++line) {
3162 fz_text_span *span;
3163
3164 b = &line->bbox;
3165 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3166 continue;
3167
3168 for (span = line->first_span; span; span = span->next) {
3169 int charnum;
3170
3171 b = &span->bbox;
3172 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3173 continue;
3174
3175 for (charnum = 0; charnum < span->len; ++charnum) {
3176 fz_rect bbox;
3177 fz_text_char_bbox (&bbox, span, charnum);
3178 b = &bbox;
3179
3180 if (x >= b->x0 && x <= b->x1
3181 && y >= b->y0 && y <= b->y1) {
3182 fz_text_style *style = span->text->style;
3183 const char *n2 =
3184 style->font && style->font->name
3185 ? style->font->name
3186 : "Span has no font name"
3187 ;
3188 FT_FaceRec *face = style->font->ft_face;
3189 if (face && face->family_name) {
3190 char *s;
3191 char *n1 = face->family_name;
3192 size_t l1 = strlen (n1);
3193 size_t l2 = strlen (n2);
3194
3195 if (l1 != l2 || memcmp (n1, n2, l1)) {
3196 s = malloc (l1 + l2 + 2);
3197 if (s) {
3198 memcpy (s, n2, l2);
3199 s[l2] = '=';
3200 memcpy (s + l2 + 1, n1, l1 + 1);
3201 str_v = caml_copy_string (s);
3202 free (s);
3203 }
3204 }
3205 }
3206 if (str_v == 0) {
3207 str_v = caml_copy_string (n2);
3208 }
3209 ret_v = caml_alloc_small (1, utext);
3210 Field (ret_v, 0) = str_v;
3211 goto unlock;
3212 }
3213 }
3214 }
3215 }
3216 }
3217 }
3218 unlock:
3219 unlock ("ml_whatsunder");
3220
3221 done:
3222 CAMLreturn (ret_v);
3223 }
3224
3225 enum { mark_page, mark_block, mark_line, mark_word };
3226
3227 static int uninteresting (int c)
3228 {
3229 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3230 || ispunct (c);
3231 }
3232
3233 CAMLprim value ml_clearmark (value ptr_v)
3234 {
3235 CAMLparam1 (ptr_v);
3236 char *s = String_val (ptr_v);
3237 struct page *page;
3238
3239 if (trylock ("ml_clearmark")) {
3240 goto done;
3241 }
3242
3243 page = parse_pointer ("ml_clearmark", s);
3244 page->fmark.span = NULL;
3245 page->lmark.span = NULL;
3246 page->fmark.i = 0;
3247 page->lmark.i = 0;
3248
3249 unlock ("ml_clearmark");
3250 done:
3251 CAMLreturn (Val_unit);
3252 }
3253
3254 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3255 {
3256 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3257 CAMLlocal1 (ret_v);
3258 fz_rect *b;
3259 struct page *page;
3260 fz_text_line *line;
3261 fz_page_block *pageb;
3262 fz_text_block *block;
3263 struct pagedim *pdim;
3264 int mark = Int_val (mark_v);
3265 char *s = String_val (ptr_v);
3266 int x = Int_val (x_v), y = Int_val (y_v);
3267
3268 ret_v = Val_bool (0);
3269 if (trylock ("ml_markunder")) {
3270 goto done;
3271 }
3272
3273 page = parse_pointer ("ml_markunder", s);
3274 pdim = &state.pagedims[page->pdimno];
3275
3276 ensuretext (page);
3277
3278 if (mark == mark_page) {
3279 int i;
3280 fz_page_block *pb1 = NULL, *pb2 = NULL;
3281
3282 for (i = 0; i < page->text->len; ++i) {
3283 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3284 pb1 = &page->text->blocks[i];
3285 break;
3286 }
3287 }
3288 if (!pb1) goto unlock;
3289
3290 for (i = page->text->len - 1; i >= 0; --i) {
3291 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3292 pb2 = &page->text->blocks[i];
3293 break;
3294 }
3295 }
3296 if (!pb2) goto unlock;
3297
3298 block = pb1->u.text;
3299
3300 page->fmark.i = 0;
3301 page->fmark.span = block->lines->first_span;
3302
3303 block = pb2->u.text;
3304 line = &block->lines[block->len - 1];
3305 page->lmark.i = line->last_span->len - 1;
3306 page->lmark.span = line->last_span;
3307 ret_v = Val_bool (1);
3308 goto unlock;
3309 }
3310
3311 x += pdim->bounds.x0;
3312 y += pdim->bounds.y0;
3313
3314 for (pageb = page->text->blocks;
3315 pageb < page->text->blocks + page->text->len;
3316 ++pageb) {
3317 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3318 block = pageb->u.text;
3319
3320 b = &block->bbox;
3321 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3322 continue;
3323
3324 if (mark == mark_block) {
3325 page->fmark.i = 0;
3326 page->fmark.span = block->lines->first_span;
3327
3328 line = &block->lines[block->len - 1];
3329 page->lmark.i = line->last_span->len - 1;
3330 page->lmark.span = line->last_span;
3331 ret_v = Val_bool (1);
3332 goto unlock;
3333 }
3334
3335 for (line = block->lines;
3336 line < block->lines + block->len;
3337 ++line) {
3338 fz_text_span *span;
3339
3340 b = &line->bbox;
3341 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3342 continue;
3343
3344 if (mark == mark_line) {
3345 page->fmark.i = 0;
3346 page->fmark.span = line->first_span;
3347
3348 page->lmark.i = line->last_span->len - 1;
3349 page->lmark.span = line->last_span;
3350 ret_v = Val_bool (1);
3351 goto unlock;
3352 }
3353
3354 for (span = line->first_span; span; span = span->next) {
3355 int charnum;
3356
3357 b = &span->bbox;
3358 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3359 continue;
3360
3361 for (charnum = 0; charnum < span->len; ++charnum) {
3362 fz_rect bbox;
3363 fz_text_char_bbox (&bbox, span, charnum);
3364 b = &bbox;
3365
3366 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3367 /* unicode ftw */
3368 int charnum2, charnum3 = -1, charnum4 = -1;
3369
3370 if (uninteresting (span->text[charnum].c)) goto unlock;
3371
3372 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3373 if (uninteresting (span->text[charnum2].c)) {
3374 charnum3 = charnum2 + 1;
3375 break;
3376 }
3377 }
3378 if (charnum3 == -1) charnum3 = 0;
3379
3380 for (charnum2 = charnum + 1;
3381 charnum2 < span->len;
3382 ++charnum2) {
3383 if (uninteresting (span->text[charnum2].c)) break;
3384 charnum4 = charnum2;
3385 }
3386 if (charnum4 == -1) goto unlock;
3387
3388 page->fmark.i = charnum3;
3389 page->fmark.span = span;
3390
3391 page->lmark.i = charnum4;
3392 page->lmark.span = span;
3393 ret_v = Val_bool (1);
3394 goto unlock;
3395 }
3396 }
3397 }
3398 }
3399 }
3400 unlock:
3401 if (!Bool_val (ret_v)) {
3402 page->fmark.span = NULL;
3403 page->lmark.span = NULL;
3404 page->fmark.i = 0;
3405 page->lmark.i = 0;
3406 }
3407 unlock ("ml_markunder");
3408
3409 done:
3410 CAMLreturn (ret_v);
3411 }
3412
3413 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3414 {
3415 CAMLparam3 (ptr_v, x_v, y_v);
3416 CAMLlocal2 (ret_v, res_v);
3417 fz_rect *b = NULL;
3418 struct page *page;
3419 fz_page_block *pageb;
3420 struct pagedim *pdim;
3421 char *s = String_val (ptr_v);
3422 int x = Int_val (x_v), y = Int_val (y_v);
3423
3424 ret_v = Val_int (0);
3425 if (trylock ("ml_rectofblock")) {
3426 goto done;
3427 }
3428
3429 page = parse_pointer ("ml_rectofblock", s);
3430 pdim = &state.pagedims[page->pdimno];
3431 x += pdim->bounds.x0;
3432 y += pdim->bounds.y0;
3433
3434 ensuretext (page);
3435
3436 for (pageb = page->text->blocks;
3437 pageb < page->text->blocks + page->text->len;
3438 ++pageb) {
3439 switch (pageb->type) {
3440 case FZ_PAGE_BLOCK_TEXT:
3441 b = &pageb->u.text->bbox;
3442 break;
3443
3444 case FZ_PAGE_BLOCK_IMAGE:
3445 b = &pageb->u.image->bbox;
3446 break;
3447
3448 default:
3449 continue;
3450 }
3451
3452 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3453 break;
3454 b = NULL;
3455 }
3456 if (b) {
3457 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3458 ret_v = caml_alloc_small (1, 1);
3459 Store_double_field (res_v, 0, b->x0);
3460 Store_double_field (res_v, 1, b->x1);
3461 Store_double_field (res_v, 2, b->y0);
3462 Store_double_field (res_v, 3, b->y1);
3463 Field (ret_v, 0) = res_v;
3464 }
3465 unlock ("ml_rectofblock");
3466
3467 done:
3468 CAMLreturn (ret_v);
3469 }
3470
3471 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3472 {
3473 CAMLparam2 (ptr_v, rect_v);
3474 fz_rect b;
3475 struct page *page;
3476 struct pagedim *pdim;
3477 char *s = String_val (ptr_v);
3478 int i, x0, x1, y0, y1, fi, li;
3479 fz_text_line *line;
3480 fz_page_block *pageb;
3481 fz_text_block *block;
3482 fz_text_span *span, *fspan, *lspan;
3483
3484 if (trylock ("ml_seltext")) {
3485 goto done;
3486 }
3487
3488 page = parse_pointer ("ml_seltext", s);
3489 ensuretext (page);
3490
3491 pdim = &state.pagedims[page->pdimno];
3492 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3493 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3494 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3495 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3496
3497 if (y0 > y1) {
3498 int t = y0;
3499 y0 = y1;
3500 y1 = t;
3501 x0 = x1;
3502 x1 = t;
3503 }
3504
3505 if (0) {
3506 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3507 glColor3ub (128, 128, 128);
3508 recti (x0, y0, x1, y1);
3509 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3510 }
3511
3512 fi = page->fmark.i;
3513 fspan = page->fmark.span;
3514
3515 li = page->lmark.i;
3516 lspan = page->lmark.span;
3517
3518 for (pageb = page->text->blocks;
3519 pageb < page->text->blocks + page->text->len;
3520 ++pageb) {
3521 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3522 block = pageb->u.text;
3523 for (line = block->lines;
3524 line < block->lines + block->len;
3525 ++line) {
3526
3527 for (span = line->first_span; span; span = span->next) {
3528 for (i = 0; i < span->len; ++i) {
3529 int selected = 0;
3530
3531 fz_text_char_bbox (&b, span, i);
3532
3533 if (x0 >= b.x0 && x0 <= b.x1
3534 && y0 >= b.y0 && y0 <= b.y1) {
3535 fspan = span;
3536 fi = i;
3537 selected = 1;
3538 }
3539 if (x1 >= b.x0 && x1 <= b.x1
3540 && y1 >= b.y0 && y1 <= b.y1) {
3541 lspan = span;
3542 li = i;
3543 selected = 1;
3544 }
3545 if (0 && selected) {
3546 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3547 glColor3ub (128, 128, 128);
3548 recti (b.x0, b.y0, b.x1, b.y1);
3549 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3550 }
3551 }
3552 }
3553 }
3554 }
3555 if (x1 < x0 && fspan == lspan) {
3556 i = fi;
3557 span = fspan;
3558
3559 fi = li;
3560 fspan = lspan;
3561
3562 li = i;
3563 lspan = span;
3564 }
3565
3566 page->fmark.i = fi;
3567 page->fmark.span = fspan;
3568
3569 page->lmark.i = li;
3570 page->lmark.span = lspan;
3571
3572 unlock ("ml_seltext");
3573
3574 done:
3575 CAMLreturn (Val_unit);
3576 }
3577
3578 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3579 {
3580 char buf[4];
3581 int i, len, ret;
3582
3583 for (i = a; i <= b; ++i) {
3584 len = fz_runetochar (buf, span->text[i].c);
3585 ret = fwrite (buf, len, 1, f);
3586
3587 if (ret != 1) {
3588 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3589 len, ret, strerror (errno));
3590 return -1;
3591 }
3592 }
3593 return 0;
3594 }
3595
3596 #ifdef __CYGWIN__
3597 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3598 {
3599 caml_failwith ("ml_popen not implemented under Cygwin");
3600 }
3601 #else
3602 CAMLprim value ml_popen (value command_v, value fds_v)
3603 {
3604 CAMLparam2 (command_v, fds_v);
3605 CAMLlocal2 (l_v, tup_v);
3606 int ret;
3607 char *msg = NULL;
3608 value earg_v = Nothing;
3609 posix_spawnattr_t attr;
3610 posix_spawn_file_actions_t fa;
3611 char *argv[] = { "/bin/sh", "-c", NULL, NULL };
3612
3613 argv[2] = String_val (command_v);
3614
3615 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3616 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3617 }
3618
3619 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3620 msg = "posix_spawnattr_init";
3621 goto fail1;
3622 }
3623
3624 #ifdef POSIX_SPAWN_USEVFORK
3625 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3626 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3627 goto fail;
3628 }
3629 #endif
3630
3631 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3632 int fd1, fd2;
3633
3634 tup_v = Field (l_v, 0);
3635 fd1 = Int_val (Field (tup_v, 0));
3636 fd2 = Int_val (Field (tup_v, 1));
3637 if (fd2 < 0) {
3638 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3639 msg = "posix_spawn_file_actions_addclose";
3640 earg_v = tup_v;
3641 goto fail;
3642 }
3643 }
3644 else {
3645 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3646 msg = "posix_spawn_file_actions_adddup2";
3647 earg_v = tup_v;
3648 goto fail;
3649 }
3650 }
3651 }
3652
3653 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3654 msg = "posix_spawn";
3655 goto fail;
3656 }
3657
3658 fail:
3659 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3660 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3661 }
3662
3663 fail1:
3664 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3665 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3666 strerror (ret));
3667 }
3668
3669 if (msg)
3670 unix_error (ret, msg, earg_v);
3671
3672 CAMLreturn (Val_unit);
3673 }
3674 #endif
3675
3676 CAMLprim value ml_hassel (value ptr_v)
3677 {
3678 CAMLparam1 (ptr_v);
3679 CAMLlocal1 (ret_v);
3680 struct page *page;
3681 char *s = String_val (ptr_v);
3682
3683 ret_v = Val_bool (0);
3684 if (trylock ("ml_hassel")) {
3685 goto done;
3686 }
3687
3688 page = parse_pointer ("ml_hassel", s);
3689 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3690 unlock ("ml_hassel");
3691 done:
3692 CAMLreturn (ret_v);
3693 }
3694
3695 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3696 {
3697 CAMLparam2 (fd_v, ptr_v);
3698 FILE *f;
3699 int seen = 0;
3700 struct page *page;
3701 fz_text_line *line;
3702 fz_page_block *pageb;
3703 fz_text_block *block;
3704 int fd = Int_val (fd_v);
3705 char *s = String_val (ptr_v);
3706
3707 if (trylock ("ml_copysel")) {
3708 goto done;
3709 }
3710
3711 page = parse_pointer ("ml_copysel", s);
3712
3713 if (!page->fmark.span || !page->lmark.span) {
3714 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3715 goto unlock;
3716 }
3717
3718 f = fdopen (fd, "w");
3719 if (!f) {
3720 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3721 fd, strerror (errno));
3722 f = stdout;
3723 }
3724
3725 for (pageb = page->text->blocks;
3726 pageb < page->text->blocks + page->text->len;
3727 ++pageb) {
3728 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3729 block = pageb->u.text;
3730 for (line = block->lines;
3731 line < block->lines + block->len;
3732 ++line) {
3733 fz_text_span *span;
3734
3735 for (span = line->first_span; span; span = span->next) {
3736 int a, b;
3737
3738 seen |= span == page->fmark.span || span == page->lmark.span;
3739 a = span == page->fmark.span ? page->fmark.i : 0;
3740 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3741
3742 if (seen) {
3743 if (pipespan (f, span, a, b)) {
3744 goto close;
3745 }
3746 if (span == page->lmark.span) {
3747 goto close;
3748 }
3749 if (span == line->last_span) {
3750 if (putc ('\n', f) == EOF) {
3751 fprintf (stderr,
3752 "failed break line on sel pipe: %s\n",
3753 strerror (errno));
3754 goto close;
3755 }
3756 }
3757 }
3758 }
3759 }
3760 }
3761 close:
3762 if (f != stdout) {
3763 int ret = fclose (f);
3764 fd = -1;
3765 if (ret == -1) {
3766 if (errno != ECHILD) {
3767 fprintf (stderr, "failed to close sel pipe: %s\n",
3768 strerror (errno));
3769 }
3770 }
3771 }
3772 unlock:
3773 unlock ("ml_copysel");
3774
3775 done:
3776 if (fd >= 0) {
3777 if (close (fd)) {
3778 fprintf (stderr, "failed to close sel pipe: %s\n",
3779 strerror (errno));
3780 }
3781 }
3782 CAMLreturn (Val_unit);
3783 }
3784
3785 CAMLprim value ml_getpdimrect (value pagedimno_v)
3786 {
3787 CAMLparam1 (pagedimno_v);
3788 CAMLlocal1 (ret_v);
3789 int pagedimno = Int_val (pagedimno_v);
3790 fz_rect box;
3791
3792 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3793 if (trylock ("ml_getpdimrect")) {
3794 box = fz_empty_rect;
3795 }
3796 else {
3797 box = state.pagedims[pagedimno].mediabox;
3798 unlock ("ml_getpdimrect");
3799 }
3800
3801 Store_double_field (ret_v, 0, box.x0);
3802 Store_double_field (ret_v, 1, box.x1);
3803 Store_double_field (ret_v, 2, box.y0);
3804 Store_double_field (ret_v, 3, box.y1);
3805
3806 CAMLreturn (ret_v);
3807 }
3808
3809 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3810 value dw_v, value cols_v)
3811 {
3812 CAMLparam3 (winw_v, winh_v, dw_v);
3813 CAMLlocal1 (ret_v);
3814 int i;
3815 double zoom = -1.;
3816 double maxh = 0.0;
3817 struct pagedim *p;
3818 double winw = Int_val (winw_v);
3819 double winh = Int_val (winh_v);
3820 double dw = Int_val (dw_v);
3821 double cols = Int_val (cols_v);
3822 double pw = 1.0, ph = 1.0;
3823
3824 if (trylock ("ml_zoom_for_height")) {
3825 goto done;
3826 }
3827
3828 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3829 double w = p->pagebox.x1 / cols;
3830 double h = p->pagebox.y1;
3831 if (h > maxh) {
3832 maxh = h;
3833 ph = h;
3834 if (state.fitmodel != FitProportional) pw = w;
3835 }
3836 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3837 }
3838
3839 zoom = (((winh / ph) * pw) + dw) / winw;
3840 unlock ("ml_zoom_for_height");
3841 done:
3842 ret_v = caml_copy_double (zoom);
3843 CAMLreturn (ret_v);
3844 }
3845
3846 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3847 {
3848 CAMLparam4 (pt_v, x_v, y_v, string_v);
3849 CAMLlocal1 (ret_v);
3850 int pt = Int_val(pt_v);
3851 int x = Int_val (x_v);
3852 int y = Int_val (y_v);
3853 double w;
3854
3855 w = draw_string (state.face, pt, x, y, String_val (string_v));
3856 ret_v = caml_copy_double (w);
3857 CAMLreturn (ret_v);
3858 }
3859
3860 CAMLprim value ml_measure_string (value pt_v, value string_v)
3861 {
3862 CAMLparam2 (pt_v, string_v);
3863 CAMLlocal1 (ret_v);
3864 int pt = Int_val (pt_v);
3865 double w;
3866
3867 w = measure_string (state.face, pt, String_val (string_v));
3868 ret_v = caml_copy_double (w);
3869 CAMLreturn (ret_v);
3870 }
3871
3872 CAMLprim value ml_getpagebox (value opaque_v)
3873 {
3874 CAMLparam1 (opaque_v);
3875 CAMLlocal1 (ret_v);
3876 fz_rect rect;
3877 fz_irect bbox;
3878 fz_matrix ctm;
3879 fz_device *dev;
3880 char *s = String_val (opaque_v);
3881 struct page *page = parse_pointer ("ml_getpagebox", s);
3882
3883 ret_v = caml_alloc_tuple (4);
3884 dev = fz_new_bbox_device (state.ctx, &rect);
3885 dev->hints |= FZ_IGNORE_SHADE;
3886
3887 switch (page->type) {
3888 case DPDF:
3889 ctm = pagectm (page);
3890 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3891 break;
3892
3893 case DXPS:
3894 ctm = pagectm (page);
3895 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3896 break;
3897
3898 default:
3899 rect = fz_infinite_rect;
3900 break;
3901 }
3902
3903 fz_free_device (dev);
3904 fz_round_rect (&bbox, &rect);
3905 Field (ret_v, 0) = Val_int (bbox.x0);
3906 Field (ret_v, 1) = Val_int (bbox.y0);
3907 Field (ret_v, 2) = Val_int (bbox.x1);
3908 Field (ret_v, 3) = Val_int (bbox.y1);
3909
3910 CAMLreturn (ret_v);
3911 }
3912
3913 CAMLprim value ml_setaalevel (value level_v)
3914 {
3915 CAMLparam1 (level_v);
3916
3917 state.aalevel = Int_val (level_v);
3918 CAMLreturn (Val_unit);
3919 }
3920
3921 #pragma GCC diagnostic push
3922 #pragma GCC diagnostic ignored "-Wvariadic-macros"
3923 #include <X11/Xlib.h>
3924 #pragma GCC diagnostic pop
3925
3926 #include <GL/glx.h>
3927
3928 static struct {
3929 Window wid;
3930 Display *dpy;
3931 GLXContext ctx;
3932 XVisualInfo *visual;
3933 } glx;
3934
3935 CAMLprim value ml_glxinit (value display_v, value wid_v, value screen_v)
3936 {
3937 CAMLparam3 (display_v, wid_v, screen_v);
3938 int attribs[] = {GLX_RGBA, GLX_DOUBLEBUFFER, None};
3939
3940 glx.dpy = XOpenDisplay (String_val (display_v));
3941 if (!glx.dpy) {
3942 caml_failwith ("XOpenDisplay");
3943 }
3944
3945 glx.visual = glXChooseVisual (glx.dpy, Int_val (screen_v), attribs);
3946 if (!glx.visual) {
3947 XCloseDisplay (glx.dpy);
3948 caml_failwith ("glXChooseVisual");
3949 }
3950
3951 glx.wid = Int_val (wid_v);
3952 CAMLreturn (Val_int (glx.visual->visualid));
3953 }
3954
3955 CAMLprim value ml_glxcompleteinit (value unit_v)
3956 {
3957 CAMLparam1 (unit_v);
3958
3959 glx.ctx = glXCreateContext (glx.dpy, glx.visual, NULL, True);
3960 if (!glx.ctx) {
3961 caml_failwith ("glXCreateContext");
3962 }
3963
3964 XFree (glx.visual);
3965 glx.visual = NULL;
3966
3967 if (!glXMakeCurrent (glx.dpy, glx.wid, glx.ctx)) {
3968 glXDestroyContext (glx.dpy, glx.ctx);
3969 glx.ctx = NULL;
3970 caml_failwith ("glXMakeCurrent");
3971 }
3972 CAMLreturn (Val_unit);
3973 }
3974
3975 CAMLprim value ml_swapb (value unit_v)
3976 {
3977 CAMLparam1 (unit_v);
3978 glXSwapBuffers (glx.dpy, glx.wid);
3979 CAMLreturn (Val_unit);
3980 }
3981
3982 #include "keysym2ucs.c"
3983
3984 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3985 {
3986 CAMLparam1 (keysym_v);
3987 CAMLlocal1 (str_v);
3988 KeySym keysym = Int_val (keysym_v);
3989 Rune rune;
3990 int len;
3991 char buf[5];
3992
3993 rune = keysym2ucs (keysym);
3994 len = fz_runetochar (buf, rune);
3995 buf[len] = 0;
3996 str_v = caml_copy_string (buf);
3997 CAMLreturn (str_v);
3998 }
3999
4000 enum { piunknown, pilinux, piosx, pisun, pibsd, picygwin };
4001
4002 CAMLprim value ml_platform (value unit_v)
4003 {
4004 CAMLparam1 (unit_v);
4005 CAMLlocal2 (tup_v, arr_v);
4006 int platid = piunknown;
4007 struct utsname buf;
4008
4009 #if defined __linux__
4010 platid = pilinux;
4011 #elif defined __CYGWIN__
4012 platid = picygwin;
4013 #elif defined __DragonFly__ || defined __FreeBSD__
4014 || defined __OpenBSD__ || defined __NetBSD__
4015 platid = pibsd;
4016 #elif defined __sun__
4017 platid = pisun;
4018 #elif defined __APPLE__
4019 platid = piosx;
4020 #endif
4021 if (uname (&buf)) err (1, "uname");
4022
4023 tup_v = caml_alloc_tuple (2);
4024 {
4025 char const *sar[] = {
4026 buf.sysname,
4027 buf.release,
4028 buf.version,
4029 buf.machine,
4030 NULL
4031 };
4032 arr_v = caml_copy_string_array (sar);
4033 }
4034 Field (tup_v, 0) = Val_int (platid);
4035 Field (tup_v, 1) = arr_v;
4036 CAMLreturn (tup_v);
4037 }
4038
4039 CAMLprim value ml_cloexec (value fd_v)
4040 {
4041 CAMLparam1 (fd_v);
4042 int fd = Int_val (fd_v);
4043
4044 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
4045 uerror ("fcntl", Nothing);
4046 }
4047 CAMLreturn (Val_unit);
4048 }
4049
4050 CAMLprim value ml_getpbo (value w_v, value h_v, value cs_v)
4051 {
4052 CAMLparam2 (w_v, h_v);
4053 CAMLlocal1 (ret_v);
4054 struct pbo *pbo;
4055 int w = Int_val (w_v);
4056 int h = Int_val (h_v);
4057 int cs = Int_val (cs_v);
4058
4059 if (state.pbo_usable) {
4060 pbo = calloc (sizeof (*pbo), 1);
4061 if (!pbo) {
4062 err (1, "calloc pbo");
4063 }
4064
4065 switch (cs) {
4066 case 0:
4067 case 1:
4068 pbo->size = w*h*4;
4069 break;
4070 case 2:
4071 pbo->size = w*h*2;
4072 break;
4073 default:
4074 errx (1, "ml_getpbo: invalid colorspace %d", cs);
4075 }
4076
4077 state.glGenBuffersARB (1, &pbo->id);
4078 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->id);
4079 state.glBufferDataARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->size,
4080 NULL, GL_STREAM_DRAW);
4081 pbo->ptr = state.glMapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB,
4082 GL_READ_WRITE);
4083 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4084 if (!pbo->ptr) {
4085 fprintf (stderr, "glMapBufferARB failed: %#x\n", glGetError ());
4086 state.glDeleteBuffersARB (1, &pbo->id);
4087 free (pbo);
4088 ret_v = caml_copy_string ("0");
4089 }
4090 else {
4091 int res;
4092 char *s;
4093
4094 res = snprintf (NULL, 0, "%" FMT_ptr, FMT_ptr_cast (pbo));
4095 if (res < 0) {
4096 err (1, "snprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4097 }
4098 s = malloc (res+1);
4099 if (!s) {
4100 err (1, "malloc %d bytes failed", res+1);
4101 }
4102 res = sprintf (s, "%" FMT_ptr, FMT_ptr_cast (pbo));
4103 if (res < 0) {
4104 err (1, "sprintf %" FMT_ptr " failed", FMT_ptr_cast (pbo));
4105 }
4106 ret_v = caml_copy_string (s);
4107 free (s);
4108 }
4109 }
4110 else {
4111 ret_v = caml_copy_string ("0");
4112 }
4113 CAMLreturn (ret_v);
4114 }
4115
4116 CAMLprim value ml_freepbo (value s_v)
4117 {
4118 CAMLparam1 (s_v);
4119 char *s = String_val (s_v);
4120 struct tile *tile = parse_pointer ("ml_freepbo", s);
4121
4122 if (tile->pbo) {
4123 state.glDeleteBuffersARB (1, &tile->pbo->id);
4124 tile->pbo->id = -1;
4125 tile->pbo->ptr = NULL;
4126 tile->pbo->size = -1;
4127 }
4128 CAMLreturn (Val_unit);
4129 }
4130
4131 CAMLprim value ml_unmappbo (value s_v)
4132 {
4133 CAMLparam1 (s_v);
4134 char *s = String_val (s_v);
4135 struct tile *tile = parse_pointer ("ml_unmappbo", s);
4136
4137 if (tile->pbo) {
4138 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
4139 if (state.glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) == GL_FALSE) {
4140 errx (1, "glUnmapBufferARB failed: %#x\n", glGetError ());
4141 }
4142 tile->pbo->ptr = NULL;
4143 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4144 }
4145 CAMLreturn (Val_unit);
4146 }
4147
4148 static void setuppbo (void)
4149 {
4150 #define GGPA(n) (*(void (**) ()) &state.n = glXGetProcAddress ((GLubyte *) #n))
4151 state.pbo_usable = GGPA (glBindBufferARB)
4152 && GGPA (glUnmapBufferARB)
4153 && GGPA (glMapBufferARB)
4154 && GGPA (glBufferDataARB)
4155 && GGPA (glGenBuffersARB)
4156 && GGPA (glDeleteBuffersARB);
4157 #undef GGPA
4158 }
4159
4160 CAMLprim value ml_pbo_usable (value unit_v)
4161 {
4162 CAMLparam1 (unit_v);
4163 CAMLreturn (Val_bool (state.pbo_usable));
4164 }
4165
4166 CAMLprim value ml_unproject (value ptr_v, value x_v, value y_v)
4167 {
4168 CAMLparam3 (ptr_v, x_v, y_v);
4169 CAMLlocal2 (ret_v, tup_v);
4170 struct page *page;
4171 char *s = String_val (ptr_v);
4172 int x = Int_val (x_v), y = Int_val (y_v);
4173 struct pagedim *pdim;
4174 fz_point p;
4175 fz_matrix ctm;
4176
4177 page = parse_pointer ("ml_unproject", s);
4178 pdim = &state.pagedims[page->pdimno];
4179
4180 ret_v = Val_int (0);
4181 if (trylock ("ml_unproject")) {
4182 goto done;
4183 }
4184
4185 switch (page->type) {
4186 case DPDF:
4187 trimctm (page->u.pdfpage, page->pdimno);
4188 break;
4189
4190 default:
4191 break;
4192 }
4193 p.x = x + pdim->bounds.x0;
4194 p.y = y + pdim->bounds.y0;
4195
4196 fz_concat (&ctm, &pdim->tctm, &pdim->ctm);
4197 fz_invert_matrix (&ctm, &ctm);
4198 fz_transform_point (&p, &ctm);
4199
4200 tup_v = caml_alloc_tuple (2);
4201 ret_v = caml_alloc_small (1, 1);
4202 Field (tup_v, 0) = Val_int (p.x);
4203 Field (tup_v, 1) = Val_int (p.y);
4204 Field (ret_v, 0) = tup_v;
4205
4206 unlock ("ml_unproject");
4207 done:
4208 CAMLreturn (ret_v);
4209 }
4210
4211 static void makestippletex (void)
4212 {
4213 const char pixels[] = "\xff\xff\0\0";
4214 glGenTextures (1, &state.stid);
4215 glBindTexture (GL_TEXTURE_1D, state.stid);
4216 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
4217 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
4218 glTexImage1D (
4219 GL_TEXTURE_1D,
4220 0,
4221 GL_ALPHA,
4222 4,
4223 0,
4224 GL_ALPHA,
4225 GL_UNSIGNED_BYTE,
4226 pixels
4227 );
4228 }
4229
4230 CAMLprim value ml_fz_version (value UNUSED_ATTR unit_v)
4231 {
4232 return caml_copy_string (FZ_VERSION);
4233 }
4234
4235 #ifdef USE_FONTCONFIG
4236 static struct {
4237 int inited;
4238 FcConfig *config;
4239 } fc;
4240
4241 static fz_font *fc_load_system_font_func (fz_context *ctx,
4242 const char *name,
4243 int bold,
4244 int italic,
4245 int needs_exact_metrics)
4246 {
4247 char *buf;
4248 size_t i, size;
4249 fz_font *font;
4250 FcChar8 *path;
4251 FcResult result;
4252 FcPattern *pat, *pat1;
4253
4254 lprintf ("looking up %s bold:%d italic:%d needs_exact_metrics:%d\n",
4255 name, bold, italic, needs_exact_metrics);
4256 if (!fc.inited) {
4257 fc.inited = 1;
4258 fc.config = FcInitLoadConfigAndFonts ();
4259 if (!fc.config) {
4260 lprintf ("FcInitLoadConfigAndFonts failed\n");
4261 return NULL;
4262 }
4263 }
4264 if (!fc.config) return NULL;
4265
4266 size = strlen (name);
4267 if (bold) size += sizeof (":bold") - 1;
4268 if (italic) size += sizeof (":italic") - 1;
4269 size += 1;
4270
4271 buf = malloc (size);
4272 if (!buf) {
4273 err (1, "malloc %zu failed", size);
4274 }
4275
4276 strcpy (buf, name);
4277 if (bold && italic) {
4278 strcat (buf, ":bold:italic");
4279 }
4280 else {
4281 if (bold) strcat (buf, ":bold");
4282 if (italic) strcat (buf, ":italic");
4283 }
4284 for (i = 0; i < size; ++i) {
4285 if (buf[i] == ',' || buf[i] == '-') buf[i] = ':';
4286 }
4287
4288 lprintf ("fcbuf=%s\n", buf);
4289 pat = FcNameParse ((FcChar8 *) buf);
4290 if (!pat) {
4291 printd ("emsg FcNameParse failed\n");
4292 free (buf);
4293 return NULL;
4294 }
4295
4296 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4297 printd ("emsg FcConfigSubstitute failed\n");
4298 free (buf);
4299 return NULL;
4300 }
4301 FcDefaultSubstitute (pat);
4302
4303 pat1 = FcFontMatch (fc.config, pat, &result);
4304 if (!pat1) {
4305 printd ("emsg FcFontMatch failed\n");
4306 FcPatternDestroy (pat);
4307 free (buf);
4308 return NULL;
4309 }
4310
4311 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4312 printd ("emsg FcPatternGetString failed\n");
4313 FcPatternDestroy (pat);
4314 FcPatternDestroy (pat1);
4315 free (buf);
4316 return NULL;
4317 }
4318
4319 #if 0
4320 printd ("emsg name=%s path=%s\n", name, path);
4321 #endif
4322 font = fz_new_font_from_file (ctx, name, (char *) path, 0, 0);
4323 FcPatternDestroy (pat);
4324 FcPatternDestroy (pat1);
4325 free (buf);
4326 return font;
4327 }
4328 #endif
4329
4330 CAMLprim value ml_init (value csock_v, value params_v)
4331 {
4332 CAMLparam2 (csock_v, params_v);
4333 CAMLlocal2 (trim_v, fuzz_v);
4334 int ret;
4335 int texcount;
4336 char *fontpath;
4337 int colorspace;
4338 int mustoresize;
4339 int haspboext;
4340 struct sigaction sa;
4341
4342 state.csock = Int_val (csock_v);
4343 state.rotate = Int_val (Field (params_v, 0));
4344 state.fitmodel = Int_val (Field (params_v, 1));
4345 trim_v = Field (params_v, 2);
4346 texcount = Int_val (Field (params_v, 3));
4347 state.sliceheight = Int_val (Field (params_v, 4));
4348 mustoresize = Int_val (Field (params_v, 5));
4349 colorspace = Int_val (Field (params_v, 6));
4350 fontpath = String_val (Field (params_v, 7));
4351
4352 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4353 if (!state.trimcachepath) {
4354 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4355 strerror (errno));
4356 }
4357 haspboext = Bool_val (Field (params_v, 9));
4358
4359 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4360
4361 #ifdef USE_FONTCONFIG
4362 fz_install_load_system_font_funcs (
4363 state.ctx, fc_load_system_font_func, NULL
4364 );
4365 #endif
4366
4367 state.trimmargins = Bool_val (Field (trim_v, 0));
4368 fuzz_v = Field (trim_v, 1);
4369 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4370 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4371 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4372 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4373
4374 set_tex_params (colorspace);
4375
4376 if (*fontpath) {
4377 #ifndef USE_FONTCONFIG
4378 state.face = load_font (fontpath);
4379 #else
4380 FcChar8 *path;
4381 FcResult result;
4382 char *buf = fontpath;
4383 FcPattern *pat, *pat1;
4384
4385 fc.inited = 1;
4386 fc.config = FcInitLoadConfigAndFonts ();
4387 if (!fc.config) {
4388 errx (1, "FcInitLoadConfigAndFonts failed");
4389 }
4390
4391 pat = FcNameParse ((FcChar8 *) buf);
4392 if (!pat) {
4393 errx (1, "FcNameParse failed");
4394 }
4395
4396 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4397 errx (1, "FcConfigSubstitute failed");
4398 }
4399 FcDefaultSubstitute (pat);
4400
4401 pat1 = FcFontMatch (fc.config, pat, &result);
4402 if (!pat1) {
4403 errx (1, "FcFontMatch failed");
4404 }
4405
4406 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4407 errx (1, "FcPatternGetString failed");
4408 }
4409
4410 state.face = load_font ((char *) path);
4411 FcPatternDestroy (pat);
4412 FcPatternDestroy (pat1);
4413 #endif
4414 }
4415 else {
4416 unsigned int len;
4417 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4418
4419 state.face = load_builtin_font (base, len);
4420 }
4421 if (!state.face) _exit (1);
4422
4423 realloctexts (texcount);
4424
4425 if (haspboext) {
4426 setuppbo ();
4427 }
4428
4429 makestippletex ();
4430
4431 #ifdef __CYGWIN__
4432 sa.sa_handler = SIG_IGN;
4433 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4434 #else
4435 sa.sa_handler = SIG_DFL;
4436 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4437 #endif
4438 if (sigemptyset (&sa.sa_mask)) {
4439 err (1, "sigemptyset");
4440 }
4441 if (sigaction (SIGCHLD, &sa, NULL)) {
4442 err (1, "sigaction");
4443 }
4444
4445 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4446 if (ret) {
4447 errx (1, "pthread_create: %s", strerror (ret));
4448 }
4449
4450 CAMLreturn (Val_unit);
4451 }
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