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CBZ trim caching
[llpp.git] / link.c
blob51fc6e2cf9b6a120de09c9117eecc3b35f0fe274
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
9 #include <unistd.h>
10 #include <pthread.h>
11 #include <sys/time.h>
12 #include <sys/types.h>
13 #include <sys/ioctl.h>
14
15 #ifdef __CYGWIN__
16 #include <cygwin/socket.h> /* FIONREAD */
17 #else
18 #include <spawn.h>
19 #endif
20
21 #include <regex.h>
22 #include <ctype.h>
23 #include <stdarg.h>
24 #include <limits.h>
25
26 #include <GL/gl.h>
27
28 #include <caml/fail.h>
29 #include <caml/alloc.h>
30 #include <caml/memory.h>
31 #include <caml/unixsupport.h>
32
33 #include <fitz.h>
34 #include <mupdf.h>
35 #include <mupdf-internal.h>
36 #include <muxps.h>
37 #include <muxps-internal.h>
38 #include <mucbz.h>
39
40 #include FT_FREETYPE_H
41
42 #define PIGGYBACK
43
44 #ifndef __USE_GNU
45 extern char **environ;
46 #endif
47
48 #define MIN(a,b) ((a) < (b) ? (a) : (b))
49 #define MAX(a,b) ((a) > (b) ? (a) : (b))
50
51 #if defined __GNUC__
52 #define NORETURN_ATTR __attribute__ ((noreturn))
53 #define UNUSED_ATTR __attribute__ ((unused))
54 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
55 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
56 #else
57 #define NORETURN_ATTR
58 #define UNUSED_ATTR
59 #define OPTIMIZE_ATTR(n)
60 #define GCC_FMT_ATTR(a, b)
61 #endif
62
63 #define FMT_s "zu"
64
65 #define FMT_ptr "p"
66 #define FMT_ptr_cast(p) (p)
67 #define FMT_ptr_cast2(p) (p)
68
69 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
70 err (int exitcode, const char *fmt, ...)
71 {
72 va_list ap;
73 int savederrno;
74
75 savederrno = errno;
76 va_start (ap, fmt);
77 vfprintf (stderr, fmt, ap);
78 va_end (ap);
79 fprintf (stderr, ": %s\n", strerror (savederrno));
80 fflush (stderr);
81 _exit (exitcode);
82 }
83
84 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
85 errx (int exitcode, const char *fmt, ...)
86 {
87 va_list ap;
88
89 va_start (ap, fmt);
90 vfprintf (stderr, fmt, ap);
91 va_end (ap);
92 fputc ('\n', stderr);
93 fflush (stderr);
94 _exit (exitcode);
95 }
96
97 #ifndef GL_TEXTURE_RECTANGLE_ARB
98 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
99 #endif
100
101 #ifndef GL_BGRA
102 #define GL_BGRA 0x80E1
103 #endif
104
105 #ifndef GL_UNSIGNED_INT_8_8_8_8
106 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
107 #endif
108
109 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
110 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
111 #endif
112
113 #if 0
114 #define lprintf printf
115 #else
116 #define lprintf(...)
117 #endif
118
119 #define ARSERT(cond) for (;;) { \
120 if (!(cond)) { \
121 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
122 } \
123 break; \
124 }
125
126 struct slice {
127 int h;
128 int texindex;
129 };
130
131 struct tile {
132 int x, y, w, h;
133 int slicecount;
134 int sliceheight;
135 fz_pixmap *pixmap;
136 struct slice slices[1];
137 };
138
139 struct pagedim {
140 int pageno;
141 int rotate;
142 int left;
143 int tctmready;
144 fz_bbox bounds;
145 fz_rect pagebox;
146 fz_rect mediabox;
147 fz_matrix ctm, zoomctm, lctm, tctm;
148 };
149
150 struct slink {
151 fz_bbox bbox;
152 fz_link *link;
153 };
154
155 enum { DPDF, DXPS, DCBZ };
156
157 struct page {
158 int tgen;
159 int sgen;
160 int type;
161 int pageno;
162 int pdimno;
163 fz_text_page *text;
164 fz_text_sheet *sheet;
165 union {
166 void *ptr;
167 pdf_page *pdfpage;
168 xps_page *xpspage;
169 cbz_page *cbzpage;
170 } u;
171 fz_display_list *dlist;
172 int slinkcount;
173 struct slink *slinks;
174 struct mark {
175 int i;
176 fz_text_span *span;
177 } fmark, lmark;
178 void (*freepage) (void *);
179 };
180
181 struct {
182 int type;
183 int sliceheight;
184 struct pagedim *pagedims;
185 int pagecount;
186 int pagedimcount;
187 union {
188 pdf_document *pdf;
189 xps_document *xps;
190 cbz_document *cbz;
191 } u;
192 fz_context *ctx;
193 int w, h;
194
195 int texindex;
196 int texcount;
197 GLuint *texids;
198
199 GLenum texiform;
200 GLenum texform;
201 GLenum texty;
202
203 fz_colorspace *colorspace;
204
205 struct {
206 int w, h;
207 struct slice *slice;
208 } *texowners;
209
210 int rotate;
211 int proportional;
212 int trimmargins;
213 int needoutline;
214 int gen;
215 int aalevel;
216
217 int trimanew;
218 fz_bbox trimfuzz;
219 fz_pixmap *pig;
220
221 pthread_t thread;
222 int cr, cw;
223 FT_Face face;
224
225 void (*closedoc) (void);
226 void (*freepage) (void *);
227
228 char *trimcachepath;
229 } state;
230
231 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
232 {
233 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
234 }
235
236 static void UNUSED_ATTR debug_bbox (const char *cap, fz_bbox r)
237 {
238 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
239 }
240
241 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
242 {
243 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
244 m.a, m.b, m.c, m.d, m.e, m.f);
245 }
246
247 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
248
249 static void lock (const char *cap)
250 {
251 int ret = pthread_mutex_lock (&mutex);
252 if (ret) {
253 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
254 }
255 }
256
257 static void unlock (const char *cap)
258 {
259 int ret = pthread_mutex_unlock (&mutex);
260 if (ret) {
261 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
262 }
263 }
264
265 static int trylock (const char *cap)
266 {
267 int ret = pthread_mutex_trylock (&mutex);
268 if (ret && ret != EBUSY) {
269 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
270 }
271 return ret == EBUSY;
272 }
273
274 static void *parse_pointer (const char *cap, const char *s)
275 {
276 int ret;
277 void *ptr;
278
279 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
280 if (ret != 1) {
281 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
282 }
283 return ptr;
284 }
285
286 static double now (void)
287 {
288 struct timeval tv;
289
290 if (gettimeofday (&tv, NULL)) {
291 err (1, "gettimeofday");
292 }
293 return tv.tv_sec + tv.tv_usec*1e-6;
294 }
295
296 static int hasdata (void)
297 {
298 int ret, avail;
299 ret = ioctl (state.cr, FIONREAD, &avail);
300 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
301 return avail > 0;
302 }
303
304 CAMLprim value ml_hasdata (value fd_v)
305 {
306 CAMLparam1 (fd_v);
307 int ret, avail;
308
309 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
310 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
311 CAMLreturn (Val_bool (avail > 0));
312 }
313
314 static void readdata (void *p, int size)
315 {
316 ssize_t n;
317
318 again:
319 n = read (state.cr, p, size);
320 if (n < 0) {
321 if (errno == EINTR) goto again;
322 err (1, "read (req %d, ret %zd)", size, n);
323 }
324 if (n - size) {
325 if (!n) errx (1, "EOF while reading");
326 errx (1, "read (req %d, ret %zd)", size, n);
327 }
328 }
329
330 static void writedata (char *p, int size)
331 {
332 char buf[4];
333 ssize_t n;
334
335 buf[0] = (size >> 24) & 0xff;
336 buf[1] = (size >> 16) & 0xff;
337 buf[2] = (size >> 8) & 0xff;
338 buf[3] = (size >> 0) & 0xff;
339
340 n = write (state.cw, buf, 4);
341 if (n != 4) {
342 if (!n) errx (1, "EOF while writing length");
343 err (1, "write %zd", n);
344 }
345
346 n = write (state.cw, p, size);
347 if (n - size) {
348 if (!n) errx (1, "EOF while writing data");
349 err (1, "write (req %d, ret %zd)", size, n);
350 }
351 }
352
353 static int readlen (void)
354 {
355 unsigned char p[4];
356
357 readdata (p, 4);
358 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
359 }
360
361 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
362 {
363 int size = 200, len;
364 va_list ap;
365 char *buf;
366
367 buf = malloc (size);
368 for (;;) {
369 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
370
371 va_start (ap, fmt);
372 len = vsnprintf (buf, size, fmt, ap);
373 va_end (ap);
374
375 if (len > -1 && len < size) {
376 writedata (buf, len);
377 break;
378 }
379
380 if (len > -1) {
381 size = len + 1;
382 }
383 else {
384 size *= 2;
385 }
386 buf = realloc (buf, size);
387 }
388 free (buf);
389 }
390
391 static void closepdf (void)
392 {
393 if (state.u.pdf) {
394 pdf_close_document (state.u.pdf);
395 state.u.pdf = NULL;
396 }
397 }
398
399 static void closexps (void)
400 {
401 if (state.u.xps) {
402 xps_close_document (state.u.xps);
403 state.u.xps = NULL;
404 }
405 }
406
407 static void closecbz (void)
408 {
409 if (state.u.cbz) {
410 cbz_close_document (state.u.cbz);
411 state.u.cbz = NULL;
412 }
413 }
414
415 static void freepdfpage (void *ptr)
416 {
417 pdf_free_page (state.u.pdf, ptr);
418 }
419
420 static void freeemptypdfpage (void *ptr)
421 {
422 (void) ptr;
423 }
424
425 static void freexpspage (void *ptr)
426 {
427 xps_free_page (state.u.xps, ptr);
428 }
429
430 static void freecbzpage (void *ptr)
431 {
432 cbz_free_page (state.u.cbz, ptr);
433 }
434
435 static void openxref (char *filename, char *password)
436 {
437 int i, len;
438
439 for (i = 0; i < state.texcount; ++i) {
440 state.texowners[i].w = -1;
441 state.texowners[i].slice = NULL;
442 }
443
444 if (state.closedoc) state.closedoc ();
445
446 len = strlen (filename);
447
448 state.type = DPDF;
449 if (len > 4) {
450 char ext[4];
451
452 ext[0] = tolower ((int) filename[len-3]);
453 ext[1] = tolower ((int) filename[len-2]);
454 ext[2] = tolower ((int) filename[len-1]);
455
456 /**/ if (ext[0] == 'x' && ext[1] == 'p' && ext[2] == 's') {
457 state.type = DXPS;
458 }
459 else if (ext[0] == 'c' && ext[1] == 'b' && ext[2] == 'z') {
460 state.type = DCBZ;
461 }
462 }
463
464 if (state.pagedims) {
465 free (state.pagedims);
466 state.pagedims = NULL;
467 }
468 state.pagedimcount = 0;
469
470 fz_set_aa_level (state.ctx, state.aalevel);
471 switch (state.type) {
472 case DPDF:
473 state.u.pdf = pdf_open_document (state.ctx, filename);
474 if (pdf_needs_password (state.u.pdf)) {
475 int okay = pdf_authenticate_password (state.u.pdf, password);
476 if (!okay) {
477 errx (1, "invalid password");
478 }
479 }
480 state.pagecount = pdf_count_pages (state.u.pdf);
481 state.closedoc = closepdf;
482 state.freepage = freepdfpage;
483 break;
484
485 case DXPS:
486 state.u.xps = xps_open_document (state.ctx, filename);
487 state.pagecount = xps_count_pages (state.u.xps);
488 state.closedoc = closexps;
489 state.freepage = freexpspage;
490 break;
491
492 case DCBZ:
493 state.u.cbz = cbz_open_document (state.ctx, filename);
494 state.pagecount = cbz_count_pages (state.u.cbz);
495 state.closedoc = closecbz;
496 state.freepage = freecbzpage;
497 break;
498 }
499 }
500
501 static void pdfinfo (void)
502 {
503 if (state.type == DPDF) {
504 pdf_obj *infoobj;
505
506 printd ("info PDF version\t%d.%d",
507 state.u.pdf->version / 10, state.u.pdf->version % 10);
508
509 infoobj = pdf_dict_gets (state.u.pdf->trailer, "Info");
510 if (infoobj) {
511 int i;
512 char *s;
513 char *items[] = { "Title", "Author", "Creator",
514 "Producer", "CreationDate" };
515
516 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
517 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
518 s = pdf_to_utf8 (state.u.pdf, obj);
519 if (*s) {
520 if (i == 0) {
521 printd ("title %s", s);
522 }
523 printd ("info %s\t%s", items[i], s);
524 }
525 fz_free (state.ctx, s);
526 }
527 }
528 printd ("infoend");
529 }
530 }
531
532 static void unlinktile (struct tile *tile)
533 {
534 int i;
535
536 for (i = 0; i < tile->slicecount; ++i) {
537 struct slice *s = &tile->slices[i];
538
539 if (s->texindex != -1) {
540 if (state.texowners[s->texindex].slice == s) {
541 state.texowners[s->texindex].slice = NULL;
542 }
543 }
544 }
545 }
546
547 static void freepage (struct page *page)
548 {
549 if (page->text) {
550 fz_free_text_page (state.ctx, page->text);
551 }
552 if (page->sheet) {
553 fz_free_text_sheet (state.ctx, page->sheet);
554 }
555 if (page->slinks) {
556 free (page->slinks);
557 }
558 page->freepage (page->u.ptr);
559 fz_free_display_list (state.ctx, page->dlist);
560 free (page);
561 }
562
563 static void freetile (struct tile *tile)
564 {
565 unlinktile (tile);
566 #ifndef PIGGYBACK
567 fz_drop_pixmap (state.ctx, tile->pixmap);
568 #else
569 if (state.pig) {
570 fz_drop_pixmap (state.ctx, state.pig);
571 }
572 state.pig = tile->pixmap;
573 #endif
574 free (tile);
575 }
576
577 #ifdef __ALTIVEC__
578 #include <altivec.h>
579
580 static int cacheline32bytes;
581
582 static void __attribute__ ((constructor)) clcheck (void)
583 {
584 char **envp = environ;
585 unsigned long *auxv;
586
587 while (*envp++);
588
589 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
590 if (*auxv == 19) {
591 cacheline32bytes = auxv[1] == 32;
592 return;
593 }
594 }
595 }
596
597 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
598 {
599 if (cacheline32bytes) {
600 intptr_t a1, a2, diff;
601 size_t sizea, i, size = pixmap->w * pixmap->h * pixmap->n;
602 vector unsigned char v = vec_splat_u8 (-1);
603 vector unsigned char *p;
604
605 a1 = a2 = (intptr_t) pixmap->samples;
606 a2 = (a1 + 31) & ~31;
607 diff = a2 - a1;
608 sizea = size - diff;
609 p = (void *) a2;
610
611 while (a1 != a2) *(char *) a1++ = 0xff;
612 for (i = 0; i < (sizea & ~31); i += 32) {
613 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
614 vec_st (v, i, p);
615 vec_st (v, i + 16, p);
616 }
617 while (i < sizea) *((char *) a1 + i++) = 0xff;
618 }
619 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
620 }
621 #else
622 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
623 #endif
624
625 static fz_matrix trimctm (pdf_page *page, int pindex)
626 {
627 fz_matrix ctm;
628 struct pagedim *pdim = &state.pagedims[pindex];
629
630 if (!pdim->tctmready) {
631 if (state.trimmargins) {
632 fz_rect realbox;
633
634 ctm = fz_concat (fz_rotate (-pdim->rotate), fz_scale (1, -1));
635 realbox = fz_transform_rect (ctm, pdim->mediabox);
636 ctm = fz_concat (ctm, fz_translate (-realbox.x0, -realbox.y0));
637 ctm = fz_concat (fz_invert_matrix (page->ctm), ctm);
638 }
639 else {
640 ctm = fz_identity;
641 }
642 pdim->tctm = ctm;
643 pdim->tctmready = 1;
644 }
645 return pdim->tctm;
646 }
647
648 static fz_matrix pagectm (struct page *page)
649 {
650 if (page->type == DPDF) {
651 return fz_concat (trimctm (page->u.pdfpage, page->pdimno),
652 state.pagedims[page->pdimno].ctm);
653 }
654 else {
655 fz_matrix ctm;
656 struct pagedim *pdim = &state.pagedims[page->pdimno];
657
658 ctm = state.pagedims[page->pdimno].ctm;
659 ctm = fz_concat (fz_translate (-pdim->mediabox.x0,
660 -pdim->mediabox.y0), ctm);
661 return ctm;
662 }
663 }
664
665 static void *loadpage (int pageno, int pindex)
666 {
667 fz_device *dev;
668 struct page *page = NULL;
669
670 page = calloc (sizeof (struct page), 1);
671 if (!page) {
672 err (1, "calloc page %d", pageno);
673 }
674
675 page->dlist = fz_new_display_list (state.ctx);
676 dev = fz_new_list_device (state.ctx, page->dlist);
677 switch (state.type) {
678 case DPDF:
679 fz_try (state.ctx) {
680 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
681 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, fz_identity, NULL);
682 page->freepage = freepdfpage;
683 }
684 fz_catch (state.ctx) {
685 page->u.ptr = NULL;
686 page->freepage = freeemptypdfpage;
687 }
688 break;
689
690 case DXPS:
691 page->u.xpspage = xps_load_page (state.u.xps, pageno);
692 xps_run_page (state.u.xps, page->u.xpspage, dev, fz_identity, NULL);
693 page->freepage = freexpspage;
694 break;
695
696 case DCBZ:
697 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
698 cbz_run_page (state.u.cbz, page->u.cbzpage, dev, fz_identity, NULL);
699 page->freepage = freecbzpage;
700 break;
701 }
702 fz_free_device (dev);
703
704 page->pdimno = pindex;
705 page->pageno = pageno;
706 page->sgen = state.gen;
707 page->tgen = state.gen;
708 page->type = state.type;
709
710 return page;
711 }
712
713 static struct tile *alloctile (int h)
714 {
715 int i;
716 int slicecount;
717 size_t tilesize;
718 struct tile *tile;
719
720 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
721 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
722 tile = calloc (tilesize, 1);
723 if (!tile) {
724 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
725 }
726 for (i = 0; i < slicecount; ++i) {
727 int sh = MIN (h, state.sliceheight);
728 tile->slices[i].h = sh;
729 tile->slices[i].texindex = -1;
730 h -= sh;
731 }
732 tile->slicecount = slicecount;
733 tile->sliceheight = state.sliceheight;
734 return tile;
735 }
736
737 struct obs {
738 int cured;
739 fz_bbox b;
740 };
741
742 static void obs_fill_image (fz_device *dev, fz_image *image, fz_matrix ctm,
743 float alpha)
744 {
745 struct obs *obs = dev->user;
746
747 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
748 fz_bbox b = fz_round_rect (fz_transform_rect (ctm, fz_unit_rect));
749 b = fz_intersect_bbox (b, obs->b);
750 obs->cured = b.x0 == obs->b.x0
751 && b.x1 == obs->b.x1
752 && b.y0 == obs->b.y0
753 && b.y1 == obs->b.y1;
754 }
755 }
756
757 static int obscured (struct page *page, fz_bbox bbox)
758 {
759 fz_device dev;
760 struct obs obs;
761
762 memset (&dev, 0, sizeof (dev));
763 memset (&obs, 0, sizeof (obs));
764 dev.hints = 0;
765 dev.flags = 0;
766 dev.user = &obs;
767 dev.ctx = state.ctx;
768 dev.fill_image = obs_fill_image;
769 obs.b = bbox;
770 fz_run_display_list (page->dlist, &dev, pagectm (page), bbox, NULL);
771 return obs.cured;
772 }
773
774 static struct tile *rendertile (struct page *page, int x, int y, int w, int h)
775 {
776 fz_bbox bbox;
777 fz_device *dev;
778 struct tile *tile;
779 struct pagedim *pdim;
780
781 tile = alloctile (h);
782 pdim = &state.pagedims[page->pdimno];
783
784 bbox = pdim->bounds;
785 bbox.x0 += x;
786 bbox.y0 += y;
787 bbox.x1 = bbox.x0 + w;
788 bbox.y1 = bbox.y0 + h;
789
790 if (state.pig) {
791 if (state.pig->w == w
792 && state.pig->h == h
793 && state.pig->colorspace == state.colorspace) {
794 tile->pixmap = state.pig;
795 tile->pixmap->x = bbox.x0;
796 tile->pixmap->y = bbox.y0;
797 }
798 else {
799 fz_drop_pixmap (state.ctx, state.pig);
800 }
801 state.pig = NULL;
802 }
803 if (!tile->pixmap) {
804 tile->pixmap =
805 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, bbox);
806 }
807
808 tile->w = w;
809 tile->h = h;
810 if (!page->u.ptr || ((w < 128 && h < 128) || !obscured (page, bbox))) {
811 clearpixmap (tile->pixmap);
812 }
813 dev = fz_new_draw_device (state.ctx, tile->pixmap);
814 fz_run_display_list (page->dlist, dev, pagectm (page), bbox, NULL);
815 fz_free_device (dev);
816
817 return tile;
818 }
819
820 static void initpdims (void)
821 {
822 double start, end;
823 int pageno, trim, show;
824 FILE *trimf = NULL;
825 int trimw = 0;
826
827 start = now ();
828
829 if (state.trimmargins && state.trimcachepath) {
830 trimf = fopen (state.trimcachepath, "rb");
831 if (!trimf) {
832 trimf = fopen (state.trimcachepath, "wb");
833 trimw = 1;
834 }
835 }
836 for (pageno = 0; pageno < state.pagecount; ++pageno) {
837 int rotate = 0;
838 struct pagedim *p;
839 fz_rect mediabox;
840
841 switch (state.type) {
842 case DPDF: {
843 pdf_obj *pageobj = state.u.pdf->page_objs[pageno];
844
845 if (state.trimmargins) {
846 pdf_obj *obj;
847 pdf_page *page;
848
849 fz_try (state.ctx) {
850 page = pdf_load_page (state.u.pdf, pageno);
851 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
852 trim = state.trimanew || !obj;
853 if (trim) {
854 fz_rect rect;
855 fz_bbox bbox;
856 fz_matrix ctm;
857 fz_device *dev;
858
859 dev = fz_new_bbox_device (state.ctx, &bbox);
860 dev->hints |= FZ_IGNORE_SHADE;
861 ctm = fz_invert_matrix (page->ctm);
862 pdf_run_page (state.u.pdf, page, dev, fz_identity, NULL);
863 fz_free_device (dev);
864
865 rect.x0 = bbox.x0 + state.trimfuzz.x0;
866 rect.x1 = bbox.x1 + state.trimfuzz.x1;
867 rect.y0 = bbox.y0 + state.trimfuzz.y0;
868 rect.y1 = bbox.y1 + state.trimfuzz.y1;
869 rect = fz_transform_rect (ctm, rect);
870 rect = fz_intersect_rect (rect, page->mediabox);
871
872 if (fz_is_empty_rect (rect)) {
873 mediabox = page->mediabox;
874 }
875 else {
876 mediabox = rect;
877 }
878
879 obj = pdf_new_array (state.ctx, 4);
880 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x0));
881 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y0));
882 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x1));
883 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y1));
884 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
885 }
886 else {
887 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
888 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
889 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
890 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
891 }
892
893 rotate = page->rotate;
894 pdf_free_page (state.u.pdf, page);
895
896 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
897 if (show) {
898 printd ("progress %f Trimming %d",
899 (double) (pageno + 1) / state.pagecount,
900 pageno + 1);
901 }
902 }
903 fz_catch (state.ctx) {
904 }
905 }
906 else {
907 fz_rect cropbox;
908
909 mediabox = pdf_to_rect (state.ctx,
910 pdf_dict_gets (pageobj, "MediaBox"));
911 if (fz_is_empty_rect (mediabox)) {
912 fprintf (stderr, "cannot find page size for page %d\n",
913 pageno+1);
914 mediabox.x0 = 0;
915 mediabox.y0 = 0;
916 mediabox.x1 = 612;
917 mediabox.y1 = 792;
918 }
919
920 cropbox = pdf_to_rect (state.ctx,
921 pdf_dict_gets (pageobj, "CropBox"));
922 if (!fz_is_empty_rect (cropbox)) {
923 mediabox = fz_intersect_rect (mediabox, cropbox);
924 }
925 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
926 }
927 break;
928 }
929
930 case DXPS:
931 {
932 xps_page *page;
933
934 page = xps_load_page (state.u.xps, pageno);
935 mediabox = xps_bound_page (state.u.xps, page);
936 rotate = 0;
937 if (state.trimmargins) {
938 fz_rect rect;
939 fz_bbox bbox;
940 fz_device *dev;
941
942 dev = fz_new_bbox_device (state.ctx, &bbox);
943 dev->hints |= FZ_IGNORE_SHADE;
944 xps_run_page (state.u.xps, page, dev, fz_identity, NULL);
945 fz_free_device (dev);
946
947 rect.x0 = bbox.x0 + state.trimfuzz.x0;
948 rect.x1 = bbox.x1 + state.trimfuzz.x1;
949 rect.y0 = bbox.y0 + state.trimfuzz.y0;
950 rect.y1 = bbox.y1 + state.trimfuzz.y1;
951 rect = fz_intersect_rect (rect, mediabox);
952
953 if (!fz_is_empty_rect (rect)) {
954 mediabox = rect;
955 }
956 }
957 xps_free_page (state.u.xps, page);
958 printd ("progress %f loading %d",
959 (double) (pageno + 1) / state.pagecount,
960 pageno + 1);
961 }
962 break;
963
964 case DCBZ:
965 {
966 rotate = 0;
967 if (state.trimmargins && trimw) {
968 cbz_page *page;
969
970 page = cbz_load_page (state.u.cbz, pageno);
971 mediabox = cbz_bound_page (state.u.cbz, page);
972 cbz_free_page (state.u.cbz, page);
973 printd ("progress %f Trimming %d",
974 (double) (pageno + 1) / state.pagecount,
975 pageno + 1);
976 if (trimf) {
977 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
978 if (n - 1) {
979 err (1, "fwrite trim mediabox");
980 }
981 }
982 }
983 else {
984 if (trimf) {
985 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
986 if (n - 1) {
987 err (1, "fread trim mediabox");
988 }
989 }
990 else {
991 mediabox.x0 = mediabox.y0 = 0;
992 mediabox.x1 = 900;
993 mediabox.y1 = 900;
994 }
995 }
996 }
997 break;
998
999 default:
1000 ARSERT (0 && state.type);
1001 }
1002
1003 if (state.pagedimcount == 0
1004 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1005 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1006 size_t size;
1007
1008 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1009 state.pagedims = realloc (state.pagedims, size);
1010 if (!state.pagedims) {
1011 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1012 size, state.pagedimcount + 1);
1013 }
1014
1015 p = &state.pagedims[state.pagedimcount++];
1016 p->rotate = rotate;
1017 p->mediabox = mediabox;
1018 p->pageno = pageno;
1019 }
1020 }
1021 end = now ();
1022 if (state.trimmargins) {
1023 printd ("progress 1 Trimmed %d pages in %f seconds",
1024 state.pagecount, end - start);
1025 }
1026 else {
1027 printd ("vmsg Processed %d pages in %f seconds",
1028 state.pagecount, end - start);
1029 }
1030 state.trimanew = 0;
1031 if (trimf) {
1032 if (fclose (trimf)) {
1033 err (1, "fclose");
1034 }
1035 }
1036 }
1037
1038 static void layout (void)
1039 {
1040 int pindex;
1041 fz_rect box;
1042 fz_matrix ctm;
1043 double zoom, w, maxw = 0;
1044 struct pagedim *p = state.pagedims;
1045
1046 if (state.proportional) {
1047 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1048 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1049 p->mediabox);
1050 w = box.x1 - box.x0;
1051 maxw = MAX (w, maxw);
1052 }
1053 }
1054
1055 p = state.pagedims;
1056 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1057 fz_bbox bbox;
1058
1059 ctm = fz_rotate (state.rotate);
1060 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1061 p->mediabox);
1062 w = box.x1 - box.x0;
1063
1064 if (state.proportional) {
1065 double scale = w / maxw;
1066 zoom = (state.w / w) * scale;
1067 }
1068 else {
1069 zoom = state.w / w;
1070 }
1071
1072 p->zoomctm = fz_scale (zoom, zoom);
1073 ctm = fz_concat (p->zoomctm, ctm);
1074
1075 p->pagebox = fz_transform_rect (fz_rotate (p->rotate), p->mediabox);
1076 p->pagebox.x1 -= p->pagebox.x0;
1077 p->pagebox.y1 -= p->pagebox.y0;
1078 p->pagebox.x0 = 0;
1079 p->pagebox.y0 = 0;
1080 bbox = fz_round_rect (fz_transform_rect (ctm, p->pagebox));
1081
1082 p->bounds = bbox;
1083 p->left = state.proportional ? ((maxw - w) * zoom) / 2.0 : 0;
1084 p->ctm = ctm;
1085
1086 ctm = fz_identity;
1087 ctm = fz_concat (ctm, fz_translate (0, -p->mediabox.y1));
1088 ctm = fz_concat (ctm, fz_scale (zoom, -zoom));
1089 ctm = fz_concat (ctm, fz_rotate (p->rotate + state.rotate));
1090 p->lctm = ctm;
1091
1092 p->tctmready = 0;
1093 }
1094
1095 while (p-- != state.pagedims) {
1096 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1097 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1098 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1099 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1100 int w = x1 - x0;
1101 int h = y1 - y0;
1102
1103 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1104 }
1105 }
1106
1107 static void recurse_outline (fz_outline *outline, int level)
1108 {
1109 while (outline) {
1110 fz_link_dest *dest;
1111 int i, top = 0;
1112 struct pagedim *pdim = state.pagedims;
1113
1114 dest = &outline->dest;
1115 for (i = 0; i < state.pagedimcount; ++i) {
1116 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1117 break;
1118 pdim = &state.pagedims[i];
1119 }
1120 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1121 fz_point p;
1122 p.x = 0;
1123 p.y = dest->ld.gotor.lt.y;
1124 p = fz_transform_point (pdim->lctm, p);
1125 top = p.y;
1126 }
1127 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1128 int h;
1129 double y0, y1;
1130
1131 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1132 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1133 h = y1 - y0;
1134 printd ("o %d %d %d %d %s",
1135 level, dest->ld.gotor.page, top, h, outline->title);
1136 }
1137 if (outline->down) {
1138 recurse_outline (outline->down, level + 1);
1139 }
1140 outline = outline->next;
1141 }
1142 }
1143
1144 static void process_outline (void)
1145 {
1146 fz_outline *outline;
1147
1148 if (!state.needoutline) return;
1149
1150 state.needoutline = 0;
1151 switch (state.type) {
1152 case DPDF:
1153 outline = pdf_load_outline (state.u.pdf);
1154 break;
1155 case DXPS:
1156 outline = xps_load_outline (state.u.xps);
1157 break;
1158 default:
1159 outline = NULL;
1160 break;
1161 }
1162 if (outline) {
1163 recurse_outline (outline, 0);
1164 fz_free_outline (state.ctx, outline);
1165 }
1166 }
1167
1168 static char *strofspan (fz_text_span *span)
1169 {
1170 char *p;
1171 char utf8[10];
1172 fz_text_char *ch;
1173 size_t size = 0, cap = 80;
1174
1175 p = malloc (cap + 1);
1176 if (!p) return NULL;
1177
1178 for (ch = span->text; ch < span->text + span->len; ++ch) {
1179 int n = fz_runetochar (utf8, ch->c);
1180 if (size + n > cap) {
1181 cap *= 2;
1182 p = realloc (p, cap + 1);
1183 if (!p) return NULL;
1184 }
1185
1186 memcpy (p + size, utf8, n);
1187 size += n;
1188 }
1189 p[size] = 0;
1190 return p;
1191 }
1192
1193 static int matchspan (regex_t *re, fz_text_span *span, fz_matrix ctm,
1194 int stop, int pageno, double start)
1195 {
1196 int ret;
1197 char *p;
1198 regmatch_t rm;
1199 int a, b, c;
1200 fz_rect *sb, *eb;
1201 fz_point p1, p2, p3, p4;
1202
1203 p = strofspan (span);
1204 if (!p) return -1;
1205
1206 ret = regexec (re, p, 1, &rm, 0);
1207 if (ret) {
1208 free (p);
1209 if (ret != REG_NOMATCH) {
1210 size_t size;
1211 char errbuf[80];
1212 size = regerror (ret, re, errbuf, sizeof (errbuf));
1213 printd ("msg regexec error `%.*s'",
1214 (int) size, errbuf);
1215 return -1;
1216 }
1217 return 0;
1218 }
1219 else {
1220 int l = span->len;
1221 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1222 c += fz_runelen (span->text[a].c);
1223 }
1224 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1225 c += fz_runelen (span->text[b].c);
1226 }
1227
1228 if (fz_runelen (span->text[b].c) > 1) {
1229 b = MAX (0, b-1);
1230 }
1231 sb = &span->text[MIN (a, l-1)].bbox;
1232 eb = &span->text[MIN (b, l-1)].bbox;
1233
1234 p1.x = sb->x0;
1235 p1.y = sb->y0;
1236 p2.x = eb->x1;
1237 p2.y = sb->y0;
1238 p3.x = eb->x1;
1239 p3.y = eb->y1;
1240 p4.x = sb->x0;
1241 p4.y = eb->y1;
1242
1243 if (!stop) {
1244 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1245 pageno, 1,
1246 p1.x, p1.y,
1247 p2.x, p2.y,
1248 p3.x, p3.y,
1249 p4.x, p4.y);
1250
1251 printd ("progress 1 found at %d `%.*s' in %f sec",
1252 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1253 now () - start);
1254 }
1255 else {
1256 printd ("match %d %d %f %f %f %f %f %f %f %f",
1257 pageno, 2,
1258 p1.x, p1.y,
1259 p2.x, p2.y,
1260 p3.x, p3.y,
1261 p4.x, p4.y);
1262 }
1263 free (p);
1264 return 1;
1265 }
1266 }
1267
1268 static int compareblocks (const void *l, const void *r)
1269 {
1270 fz_text_block const *ls = l;
1271 fz_text_block const* rs = r;
1272 return ls->bbox.y0 - rs->bbox.y0;
1273 }
1274
1275 /* wishful thinking function */
1276 static void search (regex_t *re, int pageno, int y, int forward)
1277 {
1278 int i, j;
1279 fz_matrix ctm;
1280 fz_device *tdev;
1281 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1282 fz_text_page *text;
1283 fz_text_sheet *sheet;
1284 struct pagedim *pdim, *pdimprev;
1285 int stop = 0, niters = 0;
1286 double start, end;
1287
1288 if (!(state.type == DPDF || state.type == DXPS))
1289 return;
1290
1291 start = now ();
1292 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1293 if (niters++ == 5) {
1294 niters = 0;
1295 if (hasdata ()) {
1296 printd ("progress 1 attention requested aborting search at %d",
1297 pageno);
1298 stop = 1;
1299 }
1300 else {
1301 printd ("progress %f searching in page %d",
1302 (double) (pageno + 1) / state.pagecount,
1303 pageno);
1304 }
1305 }
1306 pdimprev = NULL;
1307 for (i = 0; i < state.pagedimcount; ++i) {
1308 pdim = &state.pagedims[i];
1309 if (pdim->pageno == pageno) {
1310 goto found;
1311 }
1312 if (pdim->pageno > pageno) {
1313 pdim = pdimprev;
1314 goto found;
1315 }
1316 pdimprev = pdim;
1317 }
1318 pdim = pdimprev;
1319 found:
1320
1321 sheet = fz_new_text_sheet (state.ctx);
1322 text = fz_new_text_page (state.ctx, fz_infinite_rect);
1323 tdev = fz_new_text_device (state.ctx, sheet, text);
1324
1325 switch (state.type) {
1326 case DPDF:
1327 u.ptr = NULL;
1328 fz_try (state.ctx) {
1329 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1330 trimctm (u.pdfpage, pdim - state.pagedims);
1331 ctm = fz_concat (pdim->tctm, pdim->zoomctm);
1332 pdf_run_page (state.u.pdf, u.pdfpage, tdev, ctm, NULL);
1333 }
1334 fz_catch (state.ctx) {
1335 fz_free_device (tdev);
1336 u.ptr = NULL;
1337 goto nextiter;
1338 }
1339 break;
1340
1341 case DXPS:
1342 u.xpspage = xps_load_page (state.u.xps, pageno);
1343 ctm = pdim->ctm;
1344 xps_run_page (state.u.xps, u.xpspage, tdev, ctm, NULL);
1345 break;
1346
1347 default:
1348 ARSERT (0 && state.type);
1349 }
1350
1351 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1352 fz_free_device (tdev);
1353
1354 for (j = 0; j < text->len; ++j) {
1355 int k;
1356 fz_text_block *block;
1357
1358 block = &text->blocks[forward ? j : text->len - 1 - j];
1359
1360 for (k = 0; k < block->len; ++k) {
1361 fz_text_line *line;
1362 fz_text_span *span;
1363
1364 if (forward) {
1365 line = &block->lines[k];
1366 if (line->bbox.y0 < y + 1) continue;
1367 }
1368 else {
1369 line = &block->lines[block->len - 1 - k];
1370 if (line->bbox.y0 > y - 1) continue;
1371 }
1372
1373 for (span = line->spans;
1374 span < line->spans + line->len;
1375 ++span) {
1376
1377 switch (matchspan (re, span, ctm, stop, pageno, start)) {
1378 case 0: break;
1379 case 1: stop = 1; break;
1380 case -1: stop = 1; goto endloop;
1381 }
1382 }
1383 }
1384 }
1385 nextiter:
1386 if (forward) {
1387 pageno += 1;
1388 y = 0;
1389 }
1390 else {
1391 pageno -= 1;
1392 y = INT_MAX;
1393 }
1394 endloop:
1395 fz_free_text_page (state.ctx, text);
1396 fz_free_text_sheet (state.ctx, sheet);
1397 if (u.ptr) {
1398 state.freepage (u.ptr);
1399 }
1400 }
1401 end = now ();
1402 if (!stop) {
1403 printd ("progress 1 no matches %f sec", end - start);
1404 }
1405 printd ("clearrects");
1406 }
1407
1408 static void set_tex_params (int colorspace)
1409 {
1410 union {
1411 unsigned char b;
1412 unsigned int s;
1413 } endianness = {1};
1414
1415 switch (colorspace) {
1416 case 0:
1417 state.texiform = GL_RGBA8;
1418 state.texform = GL_RGBA;
1419 state.texty = GL_UNSIGNED_BYTE;
1420 state.colorspace = fz_device_rgb;
1421 break;
1422 case 1:
1423 state.texiform = GL_RGBA8;
1424 state.texform = GL_BGRA;
1425 state.texty = endianness.s > 1
1426 ? GL_UNSIGNED_INT_8_8_8_8
1427 : GL_UNSIGNED_INT_8_8_8_8_REV;
1428 state.colorspace = fz_device_bgr;
1429 break;
1430 case 2:
1431 state.texiform = GL_LUMINANCE_ALPHA;
1432 state.texform = GL_LUMINANCE_ALPHA;
1433 state.texty = GL_UNSIGNED_BYTE;
1434 state.colorspace = fz_device_gray;
1435 break;
1436 default:
1437 errx (1, "invalid colorspce %d", colorspace);
1438 }
1439 }
1440
1441 static void realloctexts (int texcount)
1442 {
1443 size_t size;
1444
1445 if (texcount == state.texcount) return;
1446
1447 if (texcount < state.texcount) {
1448 glDeleteTextures (state.texcount - texcount,
1449 state.texids + texcount);
1450 }
1451
1452 size = texcount * sizeof (*state.texids);
1453 state.texids = realloc (state.texids, size);
1454 if (!state.texids) {
1455 err (1, "realloc texids %" FMT_s, size);
1456 }
1457
1458 size = texcount * sizeof (*state.texowners);
1459 state.texowners = realloc (state.texowners, size);
1460 if (!state.texowners) {
1461 err (1, "realloc texowners %" FMT_s, size);
1462 }
1463 if (texcount > state.texcount) {
1464 int i;
1465
1466 glGenTextures (texcount - state.texcount,
1467 state.texids + state.texcount);
1468 for (i = state.texcount; i < texcount; ++i) {
1469 state.texowners[i].w = -1;
1470 state.texowners[i].slice = NULL;
1471 }
1472 }
1473 state.texcount = texcount;
1474 state.texindex = 0;
1475 }
1476
1477 static void * mainloop (void *unused)
1478 {
1479 char *p = NULL;
1480 int len, ret, oldlen = 0;
1481
1482 for (;;) {
1483 len = readlen ();
1484 if (len == 0) {
1485 errx (1, "readlen returned 0");
1486 }
1487
1488 if (oldlen < len + 1) {
1489 p = realloc (p, len + 1);
1490 if (!p) {
1491 err (1, "realloc %d failed", len + 1);
1492 }
1493 oldlen = len + 1;
1494 }
1495 readdata (p, len);
1496 p[len] = 0;
1497
1498 if (!strncmp ("open", p, 4)) {
1499 size_t filenamelen;
1500 char *password;
1501 char *filename = p + 5;
1502
1503 filenamelen = strlen (filename);
1504 password = filename + filenamelen + 1;
1505
1506 openxref (filename, password);
1507 pdfinfo ();
1508 initpdims ();
1509 printd ("msg Opened %s (press h/F1 to get help)", filename);
1510 state.needoutline = 1;
1511 }
1512 else if (!strncmp ("cs", p, 2)) {
1513 int i, colorspace;
1514
1515 ret = sscanf (p + 2, " %d", &colorspace);
1516 if (ret != 1) {
1517 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1518 }
1519 lock ("cs");
1520 set_tex_params (colorspace);
1521 for (i = 0; i < state.texcount; ++i) {
1522 state.texowners[i].w = -1;
1523 state.texowners[i].slice = NULL;
1524 }
1525 unlock ("cs");
1526 }
1527 else if (!strncmp ("freepage", p, 8)) {
1528 void *ptr;
1529
1530 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1531 if (ret != 1) {
1532 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1533 }
1534 freepage (ptr);
1535 }
1536 else if (!strncmp ("freetile", p, 8)) {
1537 void *ptr;
1538
1539 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1540 if (ret != 1) {
1541 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1542 }
1543 freetile (ptr);
1544 }
1545 else if (!strncmp ("search", p, 6)) {
1546 int icase, pageno, y, ret, len2, forward;
1547 char *pattern;
1548 regex_t re;
1549
1550 ret = sscanf (p + 6, " %d %d %d %d,%n",
1551 &icase, &pageno, &y, &forward, &len2);
1552 if (ret != 4) {
1553 errx (1, "malformed search `%s' ret=%d", p, ret);
1554 }
1555
1556 pattern = p + 6 + len2;
1557 ret = regcomp (&re, pattern,
1558 REG_EXTENDED | (icase ? REG_ICASE : 0));
1559 if (ret) {
1560 char errbuf[80];
1561 size_t size;
1562
1563 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1564 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1565 }
1566 else {
1567 search (&re, pageno, y, forward);
1568 regfree (&re);
1569 }
1570 }
1571 else if (!strncmp ("geometry", p, 8)) {
1572 int w, h;
1573
1574 printd ("clear");
1575 ret = sscanf (p + 8, " %d %d", &w, &h);
1576 if (ret != 2) {
1577 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1578 }
1579
1580 lock ("geometry");
1581 state.h = h;
1582 if (w != state.w) {
1583 int i;
1584 state.w = w;
1585 for (i = 0; i < state.texcount; ++i) {
1586 state.texowners[i].slice = NULL;
1587 }
1588 }
1589 layout ();
1590 process_outline ();
1591 state.gen++;
1592 unlock ("geometry");
1593 printd ("continue %d", state.pagecount);
1594 }
1595 else if (!strncmp ("reqlayout", p, 9)) {
1596 int rotate, proportional;
1597
1598 printd ("clear");
1599 ret = sscanf (p + 9, " %d %d", &rotate, &proportional);
1600 if (ret != 2) {
1601 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1602 }
1603 lock ("reqlayout");
1604 if (state.rotate != rotate || state.proportional != proportional) {
1605 state.gen += 1;
1606 }
1607 state.rotate = rotate;
1608 state.proportional = proportional;
1609 layout ();
1610 process_outline ();
1611 state.gen++;
1612 unlock ("reqlayout");
1613 printd ("continue %d", state.pagecount);
1614 }
1615 else if (!strncmp ("page", p, 4)) {
1616 double a, b;
1617 struct page *page;
1618 int pageno, pindex, ret;
1619
1620 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1621 if (ret != 2) {
1622 errx (1, "bad render line `%.*s' ret=%d", len, p, ret);
1623 }
1624
1625 lock ("page");
1626 a = now ();
1627 page = loadpage (pageno, pindex);
1628 b = now ();
1629 unlock ("page");
1630
1631 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
1632 }
1633 else if (!strncmp ("tile", p, 4)) {
1634 int x, y, w, h, ret;
1635 struct page *page;
1636 struct tile *tile;
1637 double a, b;
1638
1639 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d",
1640 FMT_ptr_cast (&page), &x, &y, &w, &h);
1641 if (ret != 5) {
1642 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
1643 }
1644
1645 lock ("tile");
1646 a = now ();
1647 tile = rendertile (page, x, y, w, h);
1648 b = now ();
1649 unlock ("tile");
1650
1651 printd ("tile %d %d %" FMT_ptr " %u %f",
1652 x, y,
1653 FMT_ptr_cast2 (tile),
1654 tile->w * tile->h * tile->pixmap->n,
1655 b - a);
1656 }
1657 else if (!strncmp ("settrim", p, 7)) {
1658 int trimmargins;
1659 fz_bbox fuzz;
1660
1661 ret = sscanf (p + 7, " %d %d %d %d %d", &trimmargins,
1662 &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
1663 if (ret != 5) {
1664 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
1665 }
1666 printd ("clear");
1667 lock ("settrim");
1668 state.trimmargins = trimmargins;
1669 state.needoutline = 1;
1670 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
1671 state.trimanew = 1;
1672 state.trimfuzz = fuzz;
1673 }
1674 state.pagedimcount = 0;
1675 free (state.pagedims);
1676 state.pagedims = NULL;
1677 initpdims ();
1678 layout ();
1679 process_outline ();
1680 unlock ("settrim");
1681 printd ("continue %d", state.pagecount);
1682 }
1683 else if (!strncmp ("sliceh", p, 6)) {
1684 int h;
1685
1686 ret = sscanf (p + 6, " %d", &h);
1687 if (ret != 1) {
1688 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
1689 }
1690 if (h != state.sliceheight) {
1691 int i;
1692
1693 state.sliceheight = h;
1694 for (i = 0; i < state.texcount; ++i) {
1695 state.texowners[i].w = -1;
1696 state.texowners[i].h = -1;
1697 state.texowners[i].slice = NULL;
1698 }
1699 }
1700 }
1701 else if (!strncmp ("interrupt", p, 9)) {
1702 printd ("vmsg interrupted");
1703 }
1704 else {
1705 errx (1, "unknown command %.*s", len, p);
1706 }
1707 }
1708 return 0;
1709 }
1710
1711 CAMLprim value ml_realloctexts (value texcount_v)
1712 {
1713 CAMLparam1 (texcount_v);
1714 int ok;
1715
1716 if (trylock ("ml_realloctexts")) {
1717 ok = 0;
1718 goto done;
1719 }
1720 realloctexts (Int_val (texcount_v));
1721 ok = 1;
1722 unlock ("ml_realloctexts");
1723
1724 done:
1725 CAMLreturn (Val_bool (ok));
1726 }
1727
1728 static void showsel (struct page *page, int ox, int oy)
1729 {
1730 int seen = 0;
1731 fz_bbox bbox;
1732 fz_text_line *line;
1733 fz_text_span *span;
1734 fz_text_block *block;
1735 struct mark first, last;
1736
1737 first = page->fmark;
1738 last = page->lmark;
1739
1740 if (!first.span || !last.span) return;
1741
1742 glEnable (GL_BLEND);
1743 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
1744 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
1745
1746 ox += state.pagedims[page->pdimno].bounds.x0;
1747 oy += state.pagedims[page->pdimno].bounds.y0;
1748 for (block = page->text->blocks;
1749 block < page->text->blocks + page->text->len;
1750 ++block) {
1751 for (line = block->lines;
1752 line < block->lines + block->len;
1753 ++line) {
1754 for (span = line->spans;
1755 span < line->spans + line->len;
1756 ++span) {
1757 int i, j, k;
1758
1759 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
1760
1761 j = 0;
1762 k = span->len - 1;
1763
1764 if (span == page->fmark.span && span == page->lmark.span) {
1765 seen = 1;
1766 j = MIN (first.i, last.i);
1767 k = MAX (first.i, last.i);
1768 }
1769 else if (span == first.span) {
1770 seen = 1;
1771 j = first.i;
1772 }
1773 else if (span == last.span) {
1774 seen = 1;
1775 k = last.i;
1776 }
1777
1778 if (seen) {
1779 for (i = j; i <= k; ++i) {
1780 fz_bbox b = fz_round_rect (span->text[i].bbox);
1781 bbox = fz_union_bbox (bbox, b);
1782 }
1783 lprintf ("%d %d %d %d oy=%d ox=%d\n",
1784 bbox.x0,
1785 bbox.y0,
1786 bbox.x1,
1787 bbox.y1,
1788 oy, ox);
1789
1790 glRecti (bbox.x0 + ox, bbox.y0 + oy,
1791 bbox.x1 + ox, bbox.y1 + oy);
1792 if (span == last.span) {
1793 goto done;
1794 }
1795 }
1796 }
1797 }
1798 }
1799 done:
1800 glDisable (GL_BLEND);
1801 }
1802
1803 #include "glfont.c"
1804
1805 static void highlightlinks (struct page *page, int xoff, int yoff)
1806 {
1807 fz_matrix ctm;
1808 fz_link *link, *links;
1809
1810 switch (page->type) {
1811 case DPDF:
1812 links = page->u.pdfpage->links;
1813 break;
1814
1815 case DXPS:
1816 links = page->u.xpspage->links;
1817 break;
1818
1819 default:
1820 return;
1821 }
1822
1823 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
1824 glEnable (GL_LINE_STIPPLE);
1825 glLineStipple (0.5, 0xcccc);
1826
1827 xoff -= state.pagedims[page->pdimno].bounds.x0;
1828 yoff -= state.pagedims[page->pdimno].bounds.y0;
1829 ctm = fz_concat (pagectm (page), fz_translate (xoff, yoff));
1830
1831 glBegin (GL_QUADS);
1832 for (link = links; link; link = link->next) {
1833 fz_point p1, p2, p3, p4;
1834
1835 p1.x = link->rect.x0;
1836 p1.y = link->rect.y0;
1837
1838 p2.x = link->rect.x1;
1839 p2.y = link->rect.y0;
1840
1841 p3.x = link->rect.x1;
1842 p3.y = link->rect.y1;
1843
1844 p4.x = link->rect.x0;
1845 p4.y = link->rect.y1;
1846
1847 p1 = fz_transform_point (ctm, p1);
1848 p2 = fz_transform_point (ctm, p2);
1849 p3 = fz_transform_point (ctm, p3);
1850 p4 = fz_transform_point (ctm, p4);
1851
1852 switch (link->dest.kind) {
1853 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
1854 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
1855 default: glColor3ub (0, 0, 0); break;
1856 }
1857
1858 glVertex2f (p1.x, p1.y);
1859 glVertex2f (p2.x, p2.y);
1860 glVertex2f (p3.x, p3.y);
1861 glVertex2f (p4.x, p4.y);
1862 }
1863 glEnd ();
1864
1865 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
1866 glDisable (GL_LINE_STIPPLE);
1867 }
1868
1869 static int compareslinks (const void *l, const void *r)
1870 {
1871 struct slink const *ls = l;
1872 struct slink const *rs = r;
1873 if (ls->bbox.y0 == rs->bbox.y0) {
1874 return rs->bbox.x0 - rs->bbox.x0;
1875 }
1876 return ls->bbox.y0 - rs->bbox.y0;
1877 }
1878
1879 static void droptext (struct page *page)
1880 {
1881 if (page->text) {
1882 fz_free_text_page (state.ctx, page->text);
1883 page->fmark.i = -1;
1884 page->lmark.i = -1;
1885 page->fmark.span = NULL;
1886 page->lmark.span = NULL;
1887 page->text = NULL;
1888 }
1889 if (page->sheet) {
1890 fz_free_text_sheet (state.ctx, page->sheet);
1891 }
1892 }
1893
1894 static void dropslinks (struct page *page)
1895 {
1896 if (page->slinks) {
1897 free (page->slinks);
1898 page->slinks = NULL;
1899 page->slinkcount = 0;
1900 }
1901 }
1902
1903 static void ensureslinks (struct page *page)
1904 {
1905 fz_matrix ctm;
1906 int i, count = 0;
1907 size_t slinksize = sizeof (*page->slinks);
1908 fz_link *link, *links;
1909
1910 if (state.gen != page->sgen) {
1911 dropslinks (page);
1912 page->sgen = state.gen;
1913 }
1914 if (page->slinks) return;
1915
1916 switch (page->type) {
1917 case DPDF:
1918 links = page->u.pdfpage->links;
1919 ctm = fz_concat (trimctm (page->u.pdfpage, page->pdimno),
1920 state.pagedims[page->pdimno].ctm);
1921 break;
1922
1923 case DXPS:
1924 links = page->u.xpspage->links;
1925 ctm = state.pagedims[page->pdimno].ctm;
1926 break;
1927
1928 default:
1929 return;
1930 }
1931
1932 for (link = links; link; link = link->next) {
1933 count++;
1934 }
1935 if (count > 0) {
1936 page->slinkcount = count;
1937 page->slinks = calloc (count, slinksize);
1938 if (!page->slinks) {
1939 err (1, "realloc slinks %d", count);
1940 }
1941
1942 for (i = 0, link = links; link; ++i, link = link->next) {
1943 page->slinks[i].link = link;
1944 page->slinks[i].bbox =
1945 fz_round_rect (fz_transform_rect (ctm, link->rect));
1946 }
1947 qsort (page->slinks, count, slinksize, compareslinks);
1948 }
1949 }
1950
1951 /* slightly tweaked fmt_ulong by D.J. Bernstein */
1952 static void fmt_linkn (char *s, unsigned int u)
1953 {
1954 unsigned int len; unsigned int q;
1955 int zma = 'z' - 'a' + 1;
1956 len = 1; q = u;
1957 while (q > zma - 1) { ++len; q /= zma; }
1958 if (s) {
1959 s += len;
1960 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
1961 /* handles u == 0 */
1962 }
1963 s[len] = 0;
1964 }
1965
1966 static void highlightslinks (struct page *page, int xoff, int yoff,
1967 int noff, char *targ, int tlen, int hfsize)
1968 {
1969 int i;
1970 char buf[40];
1971 struct slink *slink;
1972 double x0, y0, x1, y1, w;
1973
1974 ensureslinks (page);
1975 glColor3ub (0xc3, 0xb0, 0x91);
1976 for (i = 0; i < page->slinkcount; ++i) {
1977 fmt_linkn (buf, i + noff);
1978 if (!tlen || !strncmp (targ, buf, tlen)) {
1979 slink = &page->slinks[i];
1980
1981 x0 = slink->bbox.x0 + xoff - 5;
1982 y1 = slink->bbox.y0 + yoff - 5;
1983 y0 = y1 + 10 + hfsize;
1984 w = measure_string (state.face, hfsize, buf);
1985 x1 = x0 + w + 10;
1986 glRectd (x0, y0, x1, y1);
1987 }
1988 }
1989
1990 glEnable (GL_BLEND);
1991 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1992 glEnable (GL_TEXTURE_2D);
1993 glColor3ub (0, 0, 0);
1994 for (i = 0; i < page->slinkcount; ++i) {
1995 fmt_linkn (buf, i + noff);
1996 if (!tlen || !strncmp (targ, buf, tlen)) {
1997 slink = &page->slinks[i];
1998
1999 x0 = slink->bbox.x0 + xoff;
2000 y0 = slink->bbox.y0 + yoff + hfsize;
2001 draw_string (state.face, hfsize, x0, y0, buf);
2002 }
2003 }
2004 glDisable (GL_TEXTURE_2D);
2005 glDisable (GL_BLEND);
2006 }
2007
2008
2009 static void uploadslice (struct tile *tile, struct slice *slice)
2010 {
2011 int offset;
2012 struct slice *slice1;
2013
2014 offset = 0;
2015 for (slice1 = tile->slices; slice != slice1; slice1++) {
2016 offset += slice1->h * tile->w * tile->pixmap->n;
2017 }
2018 if (slice->texindex != -1 && slice->texindex < state.texcount
2019 && state.texowners[slice->texindex].slice == slice) {
2020 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2021 }
2022 else {
2023 int subimage = 0;
2024 int texindex = state.texindex++ % state.texcount;
2025
2026 if (state.texowners[texindex].w == tile->w) {
2027 if (state.texowners[texindex].h >= slice->h) {
2028 subimage = 1;
2029 }
2030 else {
2031 state.texowners[texindex].h = slice->h;
2032 }
2033 }
2034 else {
2035 state.texowners[texindex].h = slice->h;
2036 }
2037
2038 state.texowners[texindex].w = tile->w;
2039 state.texowners[texindex].slice = slice;
2040 slice->texindex = texindex;
2041
2042 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2043 if (subimage) {
2044 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2045 0,
2046 0,
2047 0,
2048 tile->w,
2049 slice->h,
2050 state.texform,
2051 state.texty,
2052 tile->pixmap->samples+offset
2053 );
2054 }
2055 else {
2056 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2057 0,
2058 state.texiform,
2059 tile->w,
2060 slice->h,
2061 0,
2062 state.texform,
2063 state.texty,
2064 tile->pixmap->samples+offset
2065 );
2066 }
2067 }
2068 }
2069
2070 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2071 {
2072 CAMLparam2 (args_v, ptr_v);
2073 int dispx = Int_val (Field (args_v, 0));
2074 int dispy = Int_val (Field (args_v, 1));
2075 int dispw = Int_val (Field (args_v, 2));
2076 int disph = Int_val (Field (args_v, 3));
2077 int tilex = Int_val (Field (args_v, 4));
2078 int tiley = Int_val (Field (args_v, 5));
2079 char *s = String_val (ptr_v);
2080 struct tile *tile = parse_pointer ("ml_drawtile", s);
2081
2082 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2083 {
2084 int slicey, firstslice;
2085 struct slice *slice;
2086
2087 firstslice = tiley / tile->sliceheight;
2088 slice = &tile->slices[firstslice];
2089 slicey = tiley % tile->sliceheight;
2090
2091 while (disph > 0) {
2092 int dh;
2093
2094 dh = slice->h - slicey;
2095 dh = MIN (disph, dh);
2096 uploadslice (tile, slice);
2097
2098 glBegin (GL_QUADS);
2099 {
2100 glTexCoord2i (tilex, slicey);
2101 glVertex2i (dispx, dispy);
2102
2103 glTexCoord2i (tilex+dispw, slicey);
2104 glVertex2i (dispx+dispw, dispy);
2105
2106 glTexCoord2i (tilex+dispw, slicey+dh);
2107 glVertex2i (dispx+dispw, dispy+dh);
2108
2109 glTexCoord2i (tilex, slicey+dh);
2110 glVertex2i (dispx, dispy+dh);
2111 }
2112 glEnd ();
2113
2114 dispy += dh;
2115 disph -= dh;
2116 slice++;
2117 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2118 slicey = 0;
2119 }
2120 }
2121 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2122 CAMLreturn (Val_unit);
2123 }
2124
2125 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2126 value xoff_v, value yoff_v,
2127 value li_v)
2128 {
2129 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2130 int xoff = Int_val (xoff_v);
2131 int yoff = Int_val (yoff_v);
2132 int noff = Int_val (Field (li_v, 0));
2133 char *targ = String_val (Field (li_v, 1));
2134 int tlen = caml_string_length (Field (li_v, 1));
2135 int hfsize = Int_val (Field (li_v, 2));
2136 char *s = String_val (ptr_v);
2137 int hlmask = Int_val (hlinks_v);
2138 struct page *page = parse_pointer ("ml_postprocess", s);
2139
2140 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2141 if (trylock ("ml_postprocess")) {
2142 noff = 0;
2143 goto done;
2144 }
2145 if (hlmask & 2) {
2146 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2147 noff = page->slinkcount;
2148 }
2149 showsel (page, xoff, yoff);
2150 unlock ("ml_postprocess");
2151
2152 done:
2153 CAMLreturn (Val_int (noff));
2154 }
2155
2156 static fz_link *getlink (struct page *page, int x, int y)
2157 {
2158 fz_point p;
2159 fz_matrix ctm;
2160 fz_link *link, *links;
2161
2162 switch (page->type) {
2163 case DPDF:
2164 ctm = trimctm (page->u.pdfpage, page->pdimno);
2165 links = page->u.pdfpage->links;
2166 break;
2167
2168 case DXPS:
2169 ctm = fz_identity;
2170 links = page->u.xpspage->links;
2171 break;
2172
2173 default:
2174 return NULL;
2175 }
2176 p.x = x;
2177 p.y = y;
2178
2179 ctm = fz_concat (ctm, state.pagedims[page->pdimno].ctm);
2180 ctm = fz_invert_matrix (ctm);
2181 p = fz_transform_point (ctm, p);
2182
2183 for (link = links; link; link = link->next) {
2184 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2185 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2186 return link;
2187 }
2188 }
2189 }
2190 return NULL;
2191 }
2192
2193 static void ensuretext (struct page *page)
2194 {
2195 if (state.gen != page->tgen) {
2196 droptext (page);
2197 page->tgen = state.gen;
2198 }
2199 if (!page->text) {
2200 fz_device *tdev;
2201
2202 page->text = fz_new_text_page (state.ctx, fz_infinite_rect);
2203 page->sheet = fz_new_text_sheet (state.ctx);
2204 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2205 fz_run_display_list (page->dlist,
2206 tdev,
2207 pagectm (page),
2208 fz_infinite_bbox, NULL);
2209 qsort (page->text->blocks, page->text->len,
2210 sizeof (*page->text->blocks), compareblocks);
2211 fz_free_device (tdev);
2212 }
2213 }
2214
2215 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2216 {
2217 CAMLparam2 (start_page_v, dir_v);
2218 CAMLlocal1 (ret_v);
2219 int i, dir = Int_val (dir_v);
2220 int start_page = Int_val (start_page_v);
2221 int end_page = dir > 0 ? state.pagecount : -1;
2222
2223 ret_v = Val_int (0);
2224 if (!(state.type == DPDF || state.type == DXPS)) {
2225 goto done;
2226 }
2227
2228 lock ("ml_findpage_with_links");
2229 for (i = start_page + dir; i != end_page; i += dir) {
2230 int found;
2231
2232 switch (state.type) {
2233 case DPDF:
2234 {
2235 pdf_page *page = NULL;
2236
2237 fz_try (state.ctx) {
2238 page = pdf_load_page (state.u.pdf, i);
2239 found = !!page->links;
2240 }
2241 fz_catch (state.ctx) {
2242 found = 0;
2243 }
2244 if (page) {
2245 freepdfpage (page);
2246 }
2247 }
2248 break;
2249 case DXPS:
2250 {
2251 xps_page *page = xps_load_page (state.u.xps, i);
2252 found = !!page->links;
2253 freexpspage (page);
2254 }
2255 break;
2256
2257 default:
2258 ARSERT ("invalid document type");
2259 }
2260
2261 if (found) {
2262 ret_v = caml_alloc_small (1, 1);
2263 Field (ret_v, 0) = Val_int (i);
2264 goto unlock;
2265 }
2266 }
2267 unlock:
2268 unlock ("ml_findpage_with_links");
2269
2270 done:
2271 CAMLreturn (ret_v);
2272 }
2273
2274 enum { dir_first, dir_last};
2275 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2276
2277 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2278 {
2279 CAMLparam2 (ptr_v, dir_v);
2280 CAMLlocal2 (ret_v, pos_v);
2281 struct page *page;
2282 int dirtag, i, slinkindex;
2283 struct slink *found = NULL ,*slink;
2284 char *s = String_val (ptr_v);
2285
2286 page = parse_pointer ("ml_findlink", s);
2287 ret_v = Val_int (0);
2288 if (trylock ("ml_findlink")) {
2289 goto done;
2290 }
2291
2292 ensureslinks (page);
2293
2294 if (Is_block (dir_v)) {
2295 dirtag = Tag_val (dir_v);
2296 switch (dirtag) {
2297 case dir_first_visible:
2298 {
2299 int x0, y0, dir, first_index, last_index;
2300
2301 pos_v = Field (dir_v, 0);
2302 x0 = Int_val (Field (pos_v, 0));
2303 y0 = Int_val (Field (pos_v, 1));
2304 dir = Int_val (Field (pos_v, 2));
2305
2306 if (dir >= 0) {
2307 dir = 1;
2308 first_index = 0;
2309 last_index = page->slinkcount;
2310 }
2311 else {
2312 first_index = page->slinkcount - 1;
2313 last_index = -1;
2314 }
2315
2316 for (i = first_index; i != last_index; i += dir) {
2317 slink = &page->slinks[i];
2318 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2319 found = slink;
2320 break;
2321 }
2322 }
2323 }
2324 break;
2325
2326 case dir_left:
2327 slinkindex = Int_val (Field (dir_v, 0));
2328 found = &page->slinks[slinkindex];
2329 for (i = slinkindex - 1; i >= 0; --i) {
2330 slink = &page->slinks[i];
2331 if (slink->bbox.x0 < found->bbox.x0) {
2332 found = slink;
2333 break;
2334 }
2335 }
2336 break;
2337
2338 case dir_right:
2339 slinkindex = Int_val (Field (dir_v, 0));
2340 found = &page->slinks[slinkindex];
2341 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2342 slink = &page->slinks[i];
2343 if (slink->bbox.x0 > found->bbox.x0) {
2344 found = slink;
2345 break;
2346 }
2347 }
2348 break;
2349
2350 case dir_down:
2351 slinkindex = Int_val (Field (dir_v, 0));
2352 found = &page->slinks[slinkindex];
2353 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2354 slink = &page->slinks[i];
2355 if (slink->bbox.y0 >= found->bbox.y0) {
2356 found = slink;
2357 break;
2358 }
2359 }
2360 break;
2361
2362 case dir_up:
2363 slinkindex = Int_val (Field (dir_v, 0));
2364 found = &page->slinks[slinkindex];
2365 for (i = slinkindex - 1; i >= 0; --i) {
2366 slink = &page->slinks[i];
2367 if (slink->bbox.y0 <= found->bbox.y0) {
2368 found = slink;
2369 break;
2370 }
2371 }
2372 break;
2373 }
2374 }
2375 else {
2376 dirtag = Int_val (dir_v);
2377 switch (dirtag) {
2378 case dir_first:
2379 found = page->slinks;
2380 break;
2381
2382 case dir_last:
2383 if (page->slinks) {
2384 found = page->slinks + (page->slinkcount - 1);
2385 }
2386 break;
2387 }
2388 }
2389 if (found) {
2390 ret_v = caml_alloc_small (2, 1);
2391 Field (ret_v, 0) = Val_int (found - page->slinks);
2392 }
2393
2394 unlock ("ml_findlink");
2395 done:
2396 CAMLreturn (ret_v);
2397 }
2398
2399 enum { uuri, ugoto, utext, uunexpected, ulaunch, unamed, uremote };
2400
2401 #define LINKTOVAL \
2402 { \
2403 int pageno; \
2404 \
2405 switch (link->dest.kind) { \
2406 case FZ_LINK_GOTO: \
2407 { \
2408 fz_point p; \
2409 \
2410 pageno = link->dest.ld.gotor.page; \
2411 p.x = 0; \
2412 p.y = 0; \
2413 \
2414 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2415 p.y = link->dest.ld.gotor.lt.y; \
2416 p = fz_transform_point (pdim->lctm, p); \
2417 } \
2418 tup_v = caml_alloc_tuple (2); \
2419 ret_v = caml_alloc_small (1, ugoto); \
2420 Field (tup_v, 0) = Val_int (pageno); \
2421 Field (tup_v, 1) = Val_int (p.y); \
2422 Field (ret_v, 0) = tup_v; \
2423 } \
2424 break; \
2425 \
2426 case FZ_LINK_URI: \
2427 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2428 ret_v = caml_alloc_small (1, uuri); \
2429 Field (ret_v, 0) = str_v; \
2430 break; \
2431 \
2432 case FZ_LINK_LAUNCH: \
2433 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2434 ret_v = caml_alloc_small (1, ulaunch); \
2435 Field (ret_v, 0) = str_v; \
2436 break; \
2437 \
2438 case FZ_LINK_NAMED: \
2439 str_v = caml_copy_string (link->dest.ld.named.named); \
2440 ret_v = caml_alloc_small (1, unamed); \
2441 Field (ret_v, 0) = str_v; \
2442 break; \
2443 \
2444 case FZ_LINK_GOTOR: \
2445 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2446 pageno = link->dest.ld.gotor.page; \
2447 tup_v = caml_alloc_tuple (2); \
2448 ret_v = caml_alloc_small (1, uremote); \
2449 Field (tup_v, 0) = str_v; \
2450 Field (tup_v, 1) = Val_int (pageno); \
2451 Field (ret_v, 0) = tup_v; \
2452 break; \
2453 \
2454 default: \
2455 { \
2456 char buf[80]; \
2457 \
2458 snprintf (buf, sizeof (buf), \
2459 "unhandled link kind %d", link->dest.kind); \
2460 str_v = caml_copy_string (buf); \
2461 ret_v = caml_alloc_small (1, uunexpected); \
2462 Field (ret_v, 0) = str_v; \
2463 } \
2464 break; \
2465 } \
2466 }
2467
2468 CAMLprim value ml_getlink (value ptr_v, value n_v)
2469 {
2470 CAMLparam2 (ptr_v, n_v);
2471 CAMLlocal3 (ret_v, tup_v, str_v);
2472 fz_link *link;
2473 struct page *page;
2474 struct pagedim *pdim;
2475 char *s = String_val (ptr_v);
2476
2477 ret_v = Val_int (0);
2478 if (trylock ("ml_getlink")) {
2479 goto done;
2480 }
2481
2482 page = parse_pointer ("ml_getlink", s);
2483 ensureslinks (page);
2484 pdim = &state.pagedims[page->pdimno];
2485 link = page->slinks[Int_val (n_v)].link;
2486 LINKTOVAL;
2487
2488 unlock ("ml_getlink");
2489 done:
2490 CAMLreturn (ret_v);
2491 }
2492
2493 CAMLprim value ml_getlinkcount (value ptr_v)
2494 {
2495 CAMLparam1 (ptr_v);
2496 struct page *page;
2497 char *s = String_val (ptr_v);
2498
2499 page = parse_pointer ("ml_getlinkcount", s);
2500 CAMLreturn (Val_int (page->slinkcount));
2501 }
2502
2503 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
2504 {
2505 CAMLparam2 (ptr_v, n_v);
2506 CAMLlocal1 (ret_v);
2507 struct page *page;
2508 struct slink *slink;
2509 char *s = String_val (ptr_v);
2510
2511 page = parse_pointer ("ml_getlinkrect", s);
2512 ret_v = caml_alloc_tuple (4);
2513 if (trylock ("ml_getlinkrect")) {
2514 Field (ret_v, 0) = Val_int (0);
2515 Field (ret_v, 1) = Val_int (0);
2516 Field (ret_v, 2) = Val_int (0);
2517 Field (ret_v, 3) = Val_int (0);
2518 goto done;
2519 }
2520 ensureslinks (page);
2521
2522 slink = &page->slinks[Int_val (n_v)];
2523 Field (ret_v, 0) = Val_int (slink->bbox.x0);
2524 Field (ret_v, 1) = Val_int (slink->bbox.y0);
2525 Field (ret_v, 2) = Val_int (slink->bbox.x1);
2526 Field (ret_v, 3) = Val_int (slink->bbox.y1);
2527 unlock ("ml_getlinkrect");
2528
2529 done:
2530 CAMLreturn (ret_v);
2531 }
2532
2533 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
2534 {
2535 CAMLparam3 (ptr_v, x_v, y_v);
2536 CAMLlocal3 (ret_v, tup_v, str_v);
2537 fz_link *link;
2538 struct page *page;
2539 char *s = String_val (ptr_v);
2540 int x = Int_val (x_v), y = Int_val (y_v);
2541 struct pagedim *pdim;
2542
2543 ret_v = Val_int (0);
2544 if (trylock ("ml_whatsunder")) {
2545 goto done;
2546 }
2547
2548 page = parse_pointer ("ml_whatsunder", s);
2549 pdim = &state.pagedims[page->pdimno];
2550 x += pdim->bounds.x0;
2551 y += pdim->bounds.y0;
2552 link = getlink (page, x, y);
2553 if (link) {
2554 LINKTOVAL;
2555 }
2556 else {
2557 fz_rect *b;
2558 fz_text_block *block;
2559
2560 ensuretext (page);
2561 for (block = page->text->blocks;
2562 block < page->text->blocks + page->text->len;
2563 ++block) {
2564 fz_text_line *line;
2565
2566 b = &block->bbox;
2567 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2568 continue;
2569
2570 for (line = block->lines;
2571 line < block->lines + block->len;
2572 ++line) {
2573 fz_text_span *span;
2574
2575 b = &line->bbox;
2576 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2577 continue;
2578
2579 for (span = line->spans;
2580 span < line->spans + line->len;
2581 ++span) {
2582 fz_text_char *ch;
2583
2584 b = &span->bbox;
2585 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2586 continue;
2587
2588 for (ch = span->text; ch < span->text + span->len; ++ch) {
2589 b = &ch->bbox;
2590
2591 if (x >= b->x0 && x <= b->x1
2592 && y >= b->y0 && y <= b->y1) {
2593 const char *n2 =
2594 span->style->font && span->style->font->name
2595 ? span->style->font->name
2596 : "Span has no font name"
2597 ;
2598 FT_FaceRec *face = span->style->font->ft_face;
2599 if (face && face->family_name) {
2600 char *s;
2601 char *n1 = face->family_name;
2602 size_t l1 = strlen (n1);
2603 size_t l2 = strlen (n2);
2604
2605 if (l1 != l2 || memcmp (n1, n2, l1)) {
2606 s = malloc (l1 + l2 + 2);
2607 if (s) {
2608 memcpy (s, n2, l2);
2609 s[l2] = '=';
2610 memcpy (s + l2 + 1, n1, l1 + 1);
2611 str_v = caml_copy_string (s);
2612 free (s);
2613 }
2614 }
2615 }
2616 if (str_v == 0) {
2617 str_v = caml_copy_string (n2);
2618 }
2619 ret_v = caml_alloc_small (1, utext);
2620 Field (ret_v, 0) = str_v;
2621 goto unlock;
2622 }
2623 }
2624 }
2625 }
2626 }
2627 }
2628 unlock:
2629 unlock ("ml_whatsunder");
2630
2631 done:
2632 CAMLreturn (ret_v);
2633 }
2634
2635 CAMLprim value ml_seltext (value ptr_v, value rect_v)
2636 {
2637 CAMLparam2 (ptr_v, rect_v);
2638 fz_rect *b;
2639 struct page *page;
2640 struct pagedim *pdim;
2641 int i, x0, x1, y0, y1;
2642 char *s = String_val (ptr_v);
2643 int fi = 0, li = 0;
2644 fz_text_block *block;
2645 fz_text_span *span, *fspan, *lspan;
2646 fz_text_line *line, *fline = NULL, *lline = NULL;
2647
2648 if (trylock ("ml_seltext")) {
2649 goto done;
2650 }
2651
2652 page = parse_pointer ("ml_seltext", s);
2653 ensuretext (page);
2654
2655 pdim = &state.pagedims[page->pdimno];
2656 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;;
2657 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
2658 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
2659 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
2660
2661 if (0) {
2662 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2663 glColor3ub (128, 128, 128);
2664 glRecti (x0, y0, x1, y1);
2665 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2666 }
2667
2668 fspan = lspan = NULL;
2669
2670 for (block = page->text->blocks;
2671 block < page->text->blocks + page->text->len;
2672 ++block) {
2673 for (line = block->lines;
2674 line < block->lines + block->len;
2675 ++line) {
2676 for (span = line->spans;
2677 span < line->spans + line->len;
2678 ++span) {
2679 for (i = 0; i < span->len; ++i) {
2680 b = &span->text[i].bbox;
2681 int selected = 0;
2682
2683 if (x0 >= b->x0 && x0 <= b->x1
2684 && y0 >= b->y0 && y0 <= b->y1) {
2685 fspan = span;
2686 fline = line;
2687 fi = i;
2688 selected = 1;
2689 }
2690 if (x1 >= b->x0 && x1 <= b->x1
2691 && y1 >= b->y0 && y1 <= b->y1) {
2692 lspan = span;
2693 lline = line;
2694 li = i;
2695 selected = 1;
2696 }
2697 if (0 && selected) {
2698 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2699 glColor3ub (128, 128, 128);
2700 glRecti (b->x0, b->y0, b->x1, b->y1);
2701 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2702 }
2703 }
2704 }
2705 }
2706 }
2707 if (y1 < y0 || x1 < x0) {
2708 int swap = 0;
2709
2710 if (fspan == lspan) {
2711 swap = 1;
2712 }
2713 else {
2714 if (y1 < y0) {
2715 if (fline != lline) {
2716 swap = 1;
2717 }
2718 }
2719 }
2720
2721 if (swap) {
2722 i = fi;
2723 span = fspan;
2724
2725 fi = li;
2726 fspan = lspan;
2727
2728 li = i;
2729 lspan = span;
2730 }
2731 }
2732
2733 page->fmark.i = fi;
2734 page->fmark.span = fspan;
2735
2736 page->lmark.i = li;
2737 page->lmark.span = lspan;
2738
2739 unlock ("ml_seltext");
2740
2741 done:
2742 CAMLreturn (Val_unit);
2743 }
2744
2745 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
2746 {
2747 char buf[4];
2748 int i, len, ret;
2749
2750 for (i = a; i <= b; ++i) {
2751 len = fz_runetochar (buf, span->text[i].c);
2752 ret = fwrite (buf, len, 1, f);
2753
2754 if (ret != 1) {
2755 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
2756 len, ret, strerror (errno));
2757 return -1;
2758 }
2759 }
2760 return 0;
2761 }
2762
2763 #ifdef __CYGWIN__
2764 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
2765 {
2766 caml_failwith ("ml_popen not implemented under Cygwin");
2767 }
2768 #else
2769 CAMLprim value ml_popen (value command_v, value fds_v)
2770 {
2771 CAMLparam2 (command_v, fds_v);
2772 CAMLlocal2 (l_v, tup_v);
2773 int ret;
2774 char *msg = NULL;
2775 value earg_v = Nothing;
2776 posix_spawnattr_t attr;
2777 posix_spawn_file_actions_t fa;
2778 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
2779
2780 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
2781 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
2782 }
2783
2784 if ((ret = posix_spawnattr_init (&attr)) != 0) {
2785 msg = "posix_spawnattr_init";
2786 goto fail1;
2787 }
2788
2789 #ifdef POSIX_SPAWN_USEVFORK
2790 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
2791 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
2792 goto fail;
2793 }
2794 #endif
2795
2796 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
2797 int fd1, fd2;
2798
2799 tup_v = Field (l_v, 0);
2800 fd1 = Int_val (Field (tup_v, 0));
2801 fd2 = Int_val (Field (tup_v, 1));
2802 if (fd2 < 0) {
2803 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
2804 msg = "posix_spawn_file_actions_addclose";
2805 earg_v = tup_v;
2806 goto fail;
2807 }
2808 }
2809 else {
2810 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
2811 msg = "posix_spawn_file_actions_adddup2";
2812 earg_v = tup_v;
2813 goto fail;
2814 }
2815 }
2816 }
2817
2818 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
2819 msg = "posix_spawn";
2820 goto fail;
2821 }
2822
2823 fail:
2824 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
2825 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
2826 }
2827
2828 fail1:
2829 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
2830 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
2831 strerror (ret));
2832 }
2833
2834 if (msg)
2835 unix_error (ret, msg, earg_v);
2836
2837 CAMLreturn (Val_unit);
2838 }
2839 #endif
2840
2841 CAMLprim value ml_copysel (value fd_v, value ptr_v)
2842 {
2843 CAMLparam1 (ptr_v);
2844 FILE *f;
2845 int seen = 0;
2846 struct page *page;
2847 fz_text_line *line;
2848 fz_text_span *span;
2849 fz_text_block *block;
2850 int fd = Int_val (fd_v);
2851 char *s = String_val (ptr_v);
2852
2853 if (trylock ("ml_copysel")) {
2854 goto done;
2855 }
2856
2857 page = parse_pointer ("ml_sopysel", s);
2858
2859 if (!page->fmark.span || !page->lmark.span) {
2860 fprintf (stderr, "nothing to copy\n");
2861 goto unlock;
2862 }
2863
2864 f = fdopen (fd, "w");
2865 if (!f) {
2866 fprintf (stderr, "failed to fopen sel pipe: %s\n",
2867 strerror (errno));
2868 f = stdout;
2869 }
2870
2871 for (block = page->text->blocks;
2872 block < page->text->blocks + page->text->len;
2873 ++block) {
2874 for (line = block->lines;
2875 line < block->lines + block->len;
2876 ++line) {
2877 for (span = line->spans;
2878 span < line->spans + line->len;
2879 ++span) {
2880 int a, b;
2881
2882 seen |= span == page->fmark.span || span == page->lmark.span;
2883 a = span == page->fmark.span ? page->fmark.i : 0;
2884 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
2885
2886 if (seen) {
2887 if (pipespan (f, span, a, b)) {
2888 goto close;
2889 }
2890 if (span == line->spans + line->len - 1) {
2891 if (putc ('\n', f) == EOF) {
2892 fprintf (stderr,
2893 "failed break line on sel pipe: %s\n",
2894 strerror (errno));
2895 goto close;
2896 }
2897 }
2898 if (span == page->lmark.span) {
2899 goto endloop;
2900 }
2901 }
2902 }
2903 }
2904 }
2905 endloop:
2906 page->lmark.span = NULL;
2907 page->fmark.span = NULL;
2908
2909 close:
2910 if (f != stdout) {
2911 int ret = fclose (f);
2912 fd = -1;
2913 if (ret == -1) {
2914 if (errno != ECHILD) {
2915 fprintf (stderr, "failed to close sel pipe: %s\n",
2916 strerror (errno));
2917 }
2918 }
2919 }
2920 unlock:
2921 unlock ("ml_copysel");
2922
2923 done:
2924 if (fd >= 0) {
2925 if (close (fd)) {
2926 fprintf (stderr, "failed to close sel pipe: %s\n",
2927 strerror (errno));
2928 }
2929 }
2930 CAMLreturn (Val_unit);
2931 }
2932
2933 CAMLprim value ml_getpdimrect (value pagedimno_v)
2934 {
2935 CAMLparam1 (pagedimno_v);
2936 CAMLlocal1 (ret_v);
2937 int pagedimno = Int_val (pagedimno_v);
2938 fz_rect box;
2939
2940 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
2941 if (trylock ("ml_getpdimrect")) {
2942 box = fz_empty_rect;
2943 }
2944 else {
2945 box = state.pagedims[pagedimno].mediabox;
2946 unlock ("ml_getpdimrect");
2947 }
2948
2949 Store_double_field (ret_v, 0, box.x0);
2950 Store_double_field (ret_v, 1, box.x1);
2951 Store_double_field (ret_v, 2, box.y0);
2952 Store_double_field (ret_v, 3, box.y1);
2953
2954 CAMLreturn (ret_v);
2955 }
2956
2957 static double getmaxw (void)
2958 {
2959 int i;
2960 struct pagedim *p;
2961 double maxw = 0.0;
2962
2963 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2964 double x0, x1, w;
2965
2966 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
2967 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
2968
2969 w = x1 - x0;
2970 maxw = MAX (w, maxw);
2971 }
2972 return maxw;
2973 }
2974
2975 CAMLprim value ml_getmaxw (value unit_v)
2976 {
2977 CAMLparam1 (unit_v);
2978 CAMLlocal1 (ret_v);
2979 double maxw = 0.0;
2980
2981 if (trylock ("ml_getmaxw")) {
2982 goto done;
2983 }
2984 maxw = getmaxw ();
2985 unlock ("ml_getmaxw");
2986 done:
2987 ret_v = caml_copy_double (maxw);
2988 CAMLreturn (ret_v);
2989 }
2990
2991 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
2992 value dw_v, value cols_v)
2993 {
2994 CAMLparam3 (winw_v, winh_v, dw_v);
2995 CAMLlocal1 (ret_v);
2996 int i;
2997 double zoom = 1.0;
2998 double maxw = 0.0, maxh = 0.0;
2999 struct pagedim *p;
3000 double winw = Int_val (winw_v);
3001 double winh = Int_val (winh_v);
3002 double dw = Int_val (dw_v);
3003 double cols = Int_val (cols_v);
3004 double pw = 1.0, ph = 1.0, aspect;
3005
3006 if (trylock ("ml_zoom_for_height")) {
3007 goto done;
3008 }
3009
3010 if (state.proportional) {
3011 maxw = getmaxw () / cols;
3012 }
3013
3014 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3015 double x0, x1, y0, y1, w, h, scaledh, scale;
3016 fz_rect rect;
3017
3018 rect = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
3019 p->mediabox);
3020 x0 = MIN (rect.x0, rect.x1);
3021 x1 = MAX (rect.x0, rect.x1);
3022 y0 = MIN (rect.y0, rect.y1);
3023 y1 = MAX (rect.y0, rect.y1);
3024
3025 w = (x1 - x0) / cols;
3026 h = y1 - y0;
3027
3028 if (state.proportional) {
3029 scale = w / maxw;
3030 scaledh = h * scale;
3031 }
3032 else {
3033 scale = 1.0;
3034 scaledh = h;
3035 }
3036
3037 if (scaledh > maxh) {
3038 maxh = scaledh;
3039 ph = scaledh;
3040 pw = w * scale;
3041 }
3042 }
3043
3044 aspect = pw / ph;
3045 zoom = (winh * aspect + dw) / winw;
3046
3047 unlock ("ml_zoom_for_height");
3048 done:
3049 ret_v = caml_copy_double (zoom);
3050 CAMLreturn (ret_v);
3051 }
3052
3053 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3054 {
3055 CAMLparam4 (pt_v, x_v, y_v, string_v);
3056 CAMLlocal1 (ret_v);
3057 int pt = Int_val(pt_v);
3058 int x = Int_val (x_v);
3059 int y = Int_val (y_v);
3060 double w;
3061
3062 w = draw_string (state.face, pt, x, y, String_val (string_v));
3063 ret_v = caml_copy_double (w);
3064 CAMLreturn (ret_v);
3065 }
3066
3067 CAMLprim value ml_measure_string (value pt_v, value string_v)
3068 {
3069 CAMLparam2 (pt_v, string_v);
3070 CAMLlocal1 (ret_v);
3071 int pt = Int_val (pt_v);
3072 double w;
3073
3074 w = measure_string (state.face, pt, String_val (string_v));
3075 ret_v = caml_copy_double (w);
3076 CAMLreturn (ret_v);
3077 }
3078
3079 CAMLprim value ml_getpagebox (value opaque_v)
3080 {
3081 CAMLparam1 (opaque_v);
3082 CAMLlocal1 (ret_v);
3083 fz_bbox bbox;
3084 fz_device *dev;
3085 char *s = String_val (opaque_v);
3086 struct page *page = parse_pointer ("ml_getpagebox", s);
3087
3088 ret_v = caml_alloc_tuple (4);
3089 dev = fz_new_bbox_device (state.ctx, &bbox);
3090 dev->hints |= FZ_IGNORE_SHADE;
3091
3092 switch (page->type) {
3093 case DPDF:
3094 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, pagectm (page), NULL);
3095 break;
3096
3097 case DXPS:
3098 xps_run_page (state.u.xps, page->u.xpspage, dev, pagectm (page), NULL);
3099 break;
3100
3101 default:
3102 bbox = fz_infinite_bbox;
3103 break;
3104 }
3105
3106 fz_free_device (dev);
3107 Field (ret_v, 0) = Val_int (bbox.x0);
3108 Field (ret_v, 1) = Val_int (bbox.y0);
3109 Field (ret_v, 2) = Val_int (bbox.x1);
3110 Field (ret_v, 3) = Val_int (bbox.y1);
3111
3112 CAMLreturn (ret_v);
3113 }
3114
3115 CAMLprim value ml_setaalevel (value level_v)
3116 {
3117 CAMLparam1 (level_v);
3118
3119 state.aalevel = Int_val (level_v);
3120 CAMLreturn (Val_unit);
3121 }
3122
3123 #undef pixel
3124 #include <X11/Xlib.h>
3125 #include <GL/glx.h>
3126
3127 static struct {
3128 Display *dpy;
3129 GLXContext ctx;
3130 GLXDrawable drawable;
3131 } glx;
3132
3133 #include "keysym2ucs.c"
3134
3135 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3136 {
3137 CAMLparam1 (keysym_v);
3138 CAMLlocal1 (str_v);
3139 KeySym keysym = Int_val (keysym_v);
3140 Rune rune;
3141 int len;
3142 char buf[5];
3143
3144 rune = keysym2ucs (keysym);
3145 len = fz_runetochar (buf, rune);
3146 buf[len] = 0;
3147 str_v = caml_copy_string (buf);
3148 CAMLreturn (str_v);
3149 }
3150
3151 CAMLprim value ml_glx (value win_v)
3152 {
3153 CAMLparam1 (win_v);
3154 XVisualInfo *visual;
3155 int screen, wid = Int_val (win_v);
3156 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3157
3158 glx.dpy = XOpenDisplay (NULL);
3159 if (!glx.dpy) {
3160 caml_failwith ("XOpenDisplay failed");
3161 }
3162
3163 screen = DefaultScreen (glx.dpy);
3164 visual = glXChooseVisual (glx.dpy, screen, attributes);
3165 if (!visual) {
3166 XCloseDisplay (glx.dpy);
3167 glx.dpy = NULL;
3168 caml_failwith ("glXChooseVisual");
3169 }
3170
3171 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3172 XFree (visual);
3173 if (!glx.ctx) {
3174 XCloseDisplay (glx.dpy);
3175 glx.dpy = NULL;
3176 caml_failwith ("glXCreateContext");
3177 }
3178
3179 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3180 glXDestroyContext (glx.dpy, glx.ctx);
3181 XCloseDisplay (glx.dpy);
3182 glx.dpy = NULL;
3183 glx.ctx = NULL;
3184 caml_failwith ("glXMakeCurrent");
3185 }
3186 glx.drawable = wid;
3187
3188 if (0) {
3189 int (*f) (int) =
3190 (int (*) (int)) glXGetProcAddress ((GLubyte *) "glXSwapIntervalMESA");
3191 printf ("sync %d\n", f (0));
3192 }
3193 CAMLreturn (Val_unit);
3194 }
3195
3196 CAMLprim value ml_swapb (value unit_v)
3197 {
3198 CAMLparam1 (unit_v);
3199 glXSwapBuffers (glx.dpy, glx.drawable);
3200 CAMLreturn (Val_unit);
3201 }
3202
3203 CAMLprim value ml_glxsync (value unit_v)
3204 {
3205 CAMLparam1 (unit_v);
3206 if (glx.dpy && glx.ctx) {
3207 glXWaitX ();
3208 glXWaitGL ();
3209 }
3210 CAMLreturn (Val_unit);
3211 }
3212
3213 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3214 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3215
3216 CAMLprim value ml_platform (value unit_v)
3217 {
3218 CAMLparam1 (unit_v);
3219 int platid = piunknown;
3220
3221 #if defined __linux__
3222 platid = pilinux;
3223 #elif defined __CYGWIN__
3224 platid = picygwin;
3225 #elif defined __DragonFly__
3226 platid = pidragonflybsd;
3227 #elif defined __FreeBSD__
3228 platid = pifreebsd;
3229 #elif defined __OpenBSD__
3230 platid = piopenbsd;
3231 #elif defined __NetBSD__
3232 platid = pinetbsd;
3233 #elif defined __sun__
3234 platid = pisun;
3235 #elif defined __APPLE__
3236 platid = piosx;
3237 #endif
3238 CAMLreturn (Val_int (platid));
3239 }
3240
3241 CAMLprim value ml_cloexec (value fd_v)
3242 {
3243 CAMLparam1 (fd_v);
3244 int fd = Int_val (fd_v);
3245
3246 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
3247 uerror ("fcntl", Nothing);
3248 }
3249 CAMLreturn (Val_unit);
3250 }
3251
3252 CAMLprim value ml_init (value pipe_v, value params_v)
3253 {
3254 CAMLparam2 (pipe_v, params_v);
3255 CAMLlocal2 (trim_v, fuzz_v);
3256 int ret;
3257 int texcount;
3258 char *fontpath;
3259 int colorspace;
3260 int mustoresize;
3261 struct sigaction sa;
3262
3263 state.cr = Int_val (Field (pipe_v, 0));
3264 state.cw = Int_val (Field (pipe_v, 1));
3265 state.rotate = Int_val (Field (params_v, 0));
3266 state.proportional = Bool_val (Field (params_v, 1));
3267 trim_v = Field (params_v, 2);
3268 texcount = Int_val (Field (params_v, 3));
3269 state.sliceheight = Int_val (Field (params_v, 4));
3270 mustoresize = Int_val (Field (params_v, 5));
3271 colorspace = Int_val (Field (params_v, 6));
3272 fontpath = String_val (Field (params_v, 7));
3273 state.trimcachepath = String_val (Field (params_v, 8));
3274
3275 state.ctx = fz_new_context (NULL, NULL, mustoresize);
3276
3277 state.trimmargins = Bool_val (Field (trim_v, 0));
3278 fuzz_v = Field (trim_v, 1);
3279 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
3280 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
3281 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
3282 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
3283
3284 set_tex_params (colorspace);
3285
3286 if (*fontpath) {
3287 state.face = load_font (fontpath);
3288 }
3289 else {
3290 unsigned int len;
3291 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
3292
3293 state.face = load_builtin_font (base, len);
3294 }
3295 if (!state.face) _exit (1);
3296
3297 realloctexts (texcount);
3298
3299 #ifdef __CYGWIN__
3300 sa.sa_handler = SIG_IGN;
3301 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
3302 #else
3303 sa.sa_handler = SIG_DFL;
3304 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
3305 #endif
3306 if (sigemptyset (&sa.sa_mask)) {
3307 err (1, "sigemptyset");
3308 }
3309 if (sigaction (SIGCHLD, &sa, NULL)) {
3310 err (1, "sigaction");
3311 }
3312
3313 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
3314 if (ret) {
3315 errx (1, "pthread_create: %s", strerror (ret));
3316 }
3317
3318 CAMLreturn (Val_unit);
3319 }
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