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Give presentation mode fine positioning some love
[llpp.git] / link.c
bloba47d6fcf0aeaad849fb4ee8a98db795c242224ec
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 size_t size = pixmap->w * pixmap->h * pixmap->n;
600 if (cacheline32bytes && size > 32) {
601 intptr_t a1, a2, diff;
602 size_t sizea, i;
603 vector unsigned char v = vec_splat_u8 (-1);
604 vector unsigned char *p;
605
606 a1 = a2 = (intptr_t) pixmap->samples;
607 a2 = (a1 + 31) & ~31;
608 diff = a2 - a1;
609 sizea = size - diff;
610 p = (void *) a2;
611
612 while (a1 != a2) *(char *) a1++ = 0xff;
613 for (i = 0; i < (sizea & ~31); i += 32) {
614 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
615 vec_st (v, i, p);
616 vec_st (v, i + 16, p);
617 }
618 while (i < sizea) *((char *) a1 + i++) = 0xff;
619 }
620 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
621 }
622 #else
623 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
624 #endif
625
626 static fz_matrix trimctm (pdf_page *page, int pindex)
627 {
628 fz_matrix ctm;
629 struct pagedim *pdim = &state.pagedims[pindex];
630
631 if (!pdim->tctmready) {
632 if (state.trimmargins) {
633 fz_rect realbox;
634
635 ctm = fz_concat (fz_rotate (-pdim->rotate), fz_scale (1, -1));
636 realbox = fz_transform_rect (ctm, pdim->mediabox);
637 ctm = fz_concat (ctm, fz_translate (-realbox.x0, -realbox.y0));
638 ctm = fz_concat (fz_invert_matrix (page->ctm), ctm);
639 }
640 else {
641 ctm = fz_identity;
642 }
643 pdim->tctm = ctm;
644 pdim->tctmready = 1;
645 }
646 return pdim->tctm;
647 }
648
649 static fz_matrix pagectm (struct page *page)
650 {
651 if (page->type == DPDF) {
652 return fz_concat (trimctm (page->u.pdfpage, page->pdimno),
653 state.pagedims[page->pdimno].ctm);
654 }
655 else {
656 fz_matrix ctm;
657 struct pagedim *pdim = &state.pagedims[page->pdimno];
658
659 ctm = state.pagedims[page->pdimno].ctm;
660 ctm = fz_concat (fz_translate (-pdim->mediabox.x0,
661 -pdim->mediabox.y0), ctm);
662 return ctm;
663 }
664 }
665
666 static void *loadpage (int pageno, int pindex)
667 {
668 fz_device *dev;
669 struct page *page = NULL;
670
671 page = calloc (sizeof (struct page), 1);
672 if (!page) {
673 err (1, "calloc page %d", pageno);
674 }
675
676 page->dlist = fz_new_display_list (state.ctx);
677 dev = fz_new_list_device (state.ctx, page->dlist);
678 switch (state.type) {
679 case DPDF:
680 fz_try (state.ctx) {
681 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
682 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, fz_identity, NULL);
683 page->freepage = freepdfpage;
684 }
685 fz_catch (state.ctx) {
686 page->u.ptr = NULL;
687 page->freepage = freeemptypdfpage;
688 }
689 break;
690
691 case DXPS:
692 page->u.xpspage = xps_load_page (state.u.xps, pageno);
693 xps_run_page (state.u.xps, page->u.xpspage, dev, fz_identity, NULL);
694 page->freepage = freexpspage;
695 break;
696
697 case DCBZ:
698 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
699 cbz_run_page (state.u.cbz, page->u.cbzpage, dev, fz_identity, NULL);
700 page->freepage = freecbzpage;
701 break;
702 }
703 fz_free_device (dev);
704
705 page->pdimno = pindex;
706 page->pageno = pageno;
707 page->sgen = state.gen;
708 page->tgen = state.gen;
709 page->type = state.type;
710
711 return page;
712 }
713
714 static struct tile *alloctile (int h)
715 {
716 int i;
717 int slicecount;
718 size_t tilesize;
719 struct tile *tile;
720
721 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
722 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
723 tile = calloc (tilesize, 1);
724 if (!tile) {
725 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
726 }
727 for (i = 0; i < slicecount; ++i) {
728 int sh = MIN (h, state.sliceheight);
729 tile->slices[i].h = sh;
730 tile->slices[i].texindex = -1;
731 h -= sh;
732 }
733 tile->slicecount = slicecount;
734 tile->sliceheight = state.sliceheight;
735 return tile;
736 }
737
738 struct obs {
739 int cured;
740 fz_bbox b;
741 };
742
743 static void obs_fill_image (fz_device *dev, fz_image *image, fz_matrix ctm,
744 float alpha)
745 {
746 struct obs *obs = dev->user;
747
748 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
749 fz_bbox b = fz_round_rect (fz_transform_rect (ctm, fz_unit_rect));
750 b = fz_intersect_bbox (b, obs->b);
751 obs->cured = b.x0 == obs->b.x0
752 && b.x1 == obs->b.x1
753 && b.y0 == obs->b.y0
754 && b.y1 == obs->b.y1;
755 }
756 }
757
758 static int obscured (struct page *page, fz_bbox bbox)
759 {
760 fz_device dev;
761 struct obs obs;
762
763 memset (&dev, 0, sizeof (dev));
764 memset (&obs, 0, sizeof (obs));
765 dev.hints = 0;
766 dev.flags = 0;
767 dev.user = &obs;
768 dev.ctx = state.ctx;
769 dev.fill_image = obs_fill_image;
770 obs.b = bbox;
771 fz_run_display_list (page->dlist, &dev, pagectm (page), bbox, NULL);
772 return obs.cured;
773 }
774
775 static struct tile *rendertile (struct page *page, int x, int y, int w, int h)
776 {
777 fz_bbox bbox;
778 fz_device *dev;
779 struct tile *tile;
780 struct pagedim *pdim;
781
782 tile = alloctile (h);
783 pdim = &state.pagedims[page->pdimno];
784
785 bbox = pdim->bounds;
786 bbox.x0 += x;
787 bbox.y0 += y;
788 bbox.x1 = bbox.x0 + w;
789 bbox.y1 = bbox.y0 + h;
790
791 if (state.pig) {
792 if (state.pig->w == w
793 && state.pig->h == h
794 && state.pig->colorspace == state.colorspace) {
795 tile->pixmap = state.pig;
796 tile->pixmap->x = bbox.x0;
797 tile->pixmap->y = bbox.y0;
798 }
799 else {
800 fz_drop_pixmap (state.ctx, state.pig);
801 }
802 state.pig = NULL;
803 }
804 if (!tile->pixmap) {
805 tile->pixmap =
806 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, bbox);
807 }
808
809 tile->w = w;
810 tile->h = h;
811 if (!page->u.ptr || ((w < 128 && h < 128) || !obscured (page, bbox))) {
812 clearpixmap (tile->pixmap);
813 }
814 dev = fz_new_draw_device (state.ctx, tile->pixmap);
815 fz_run_display_list (page->dlist, dev, pagectm (page), bbox, NULL);
816 fz_free_device (dev);
817
818 return tile;
819 }
820
821 static void initpdims (void)
822 {
823 double start, end;
824 int pageno, trim, show;
825 FILE *trimf = NULL;
826 int trimw = 0;
827
828 start = now ();
829
830 if (state.trimmargins && state.trimcachepath) {
831 trimf = fopen (state.trimcachepath, "rb");
832 if (!trimf) {
833 trimf = fopen (state.trimcachepath, "wb");
834 trimw = 1;
835 }
836 }
837 for (pageno = 0; pageno < state.pagecount; ++pageno) {
838 int rotate = 0;
839 struct pagedim *p;
840 fz_rect mediabox;
841
842 switch (state.type) {
843 case DPDF: {
844 pdf_obj *pageobj = state.u.pdf->page_objs[pageno];
845
846 if (state.trimmargins) {
847 pdf_obj *obj;
848 pdf_page *page;
849
850 fz_try (state.ctx) {
851 page = pdf_load_page (state.u.pdf, pageno);
852 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
853 trim = state.trimanew || !obj;
854 if (trim) {
855 fz_rect rect;
856 fz_bbox bbox;
857 fz_matrix ctm;
858 fz_device *dev;
859
860 dev = fz_new_bbox_device (state.ctx, &bbox);
861 dev->hints |= FZ_IGNORE_SHADE;
862 ctm = fz_invert_matrix (page->ctm);
863 pdf_run_page (state.u.pdf, page, dev, fz_identity, NULL);
864 fz_free_device (dev);
865
866 rect.x0 = bbox.x0 + state.trimfuzz.x0;
867 rect.x1 = bbox.x1 + state.trimfuzz.x1;
868 rect.y0 = bbox.y0 + state.trimfuzz.y0;
869 rect.y1 = bbox.y1 + state.trimfuzz.y1;
870 rect = fz_transform_rect (ctm, rect);
871 rect = fz_intersect_rect (rect, page->mediabox);
872
873 if (fz_is_empty_rect (rect)) {
874 mediabox = page->mediabox;
875 }
876 else {
877 mediabox = rect;
878 }
879
880 obj = pdf_new_array (state.ctx, 4);
881 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x0));
882 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y0));
883 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x1));
884 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y1));
885 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
886 }
887 else {
888 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
889 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
890 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
891 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
892 }
893
894 rotate = page->rotate;
895 pdf_free_page (state.u.pdf, page);
896
897 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
898 if (show) {
899 printd ("progress %f Trimming %d",
900 (double) (pageno + 1) / state.pagecount,
901 pageno + 1);
902 }
903 }
904 fz_catch (state.ctx) {
905 }
906 }
907 else {
908 fz_rect cropbox;
909
910 mediabox = pdf_to_rect (state.ctx,
911 pdf_dict_gets (pageobj, "MediaBox"));
912 if (fz_is_empty_rect (mediabox)) {
913 fprintf (stderr, "cannot find page size for page %d\n",
914 pageno+1);
915 mediabox.x0 = 0;
916 mediabox.y0 = 0;
917 mediabox.x1 = 612;
918 mediabox.y1 = 792;
919 }
920
921 cropbox = pdf_to_rect (state.ctx,
922 pdf_dict_gets (pageobj, "CropBox"));
923 if (!fz_is_empty_rect (cropbox)) {
924 mediabox = fz_intersect_rect (mediabox, cropbox);
925 }
926 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
927 }
928 break;
929 }
930
931 case DXPS:
932 {
933 xps_page *page;
934
935 page = xps_load_page (state.u.xps, pageno);
936 mediabox = xps_bound_page (state.u.xps, page);
937 rotate = 0;
938 if (state.trimmargins) {
939 fz_rect rect;
940 fz_bbox bbox;
941 fz_device *dev;
942
943 dev = fz_new_bbox_device (state.ctx, &bbox);
944 dev->hints |= FZ_IGNORE_SHADE;
945 xps_run_page (state.u.xps, page, dev, fz_identity, NULL);
946 fz_free_device (dev);
947
948 rect.x0 = bbox.x0 + state.trimfuzz.x0;
949 rect.x1 = bbox.x1 + state.trimfuzz.x1;
950 rect.y0 = bbox.y0 + state.trimfuzz.y0;
951 rect.y1 = bbox.y1 + state.trimfuzz.y1;
952 rect = fz_intersect_rect (rect, mediabox);
953
954 if (!fz_is_empty_rect (rect)) {
955 mediabox = rect;
956 }
957 }
958 xps_free_page (state.u.xps, page);
959 printd ("progress %f loading %d",
960 (double) (pageno + 1) / state.pagecount,
961 pageno + 1);
962 }
963 break;
964
965 case DCBZ:
966 {
967 rotate = 0;
968 if (state.trimmargins && trimw) {
969 cbz_page *page;
970
971 page = cbz_load_page (state.u.cbz, pageno);
972 mediabox = cbz_bound_page (state.u.cbz, page);
973 cbz_free_page (state.u.cbz, page);
974 printd ("progress %f Trimming %d",
975 (double) (pageno + 1) / state.pagecount,
976 pageno + 1);
977 if (trimf) {
978 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
979 if (n - 1) {
980 err (1, "fwrite trim mediabox");
981 }
982 }
983 }
984 else {
985 if (trimf) {
986 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
987 if (n - 1) {
988 err (1, "fread trim mediabox");
989 }
990 }
991 else {
992 mediabox.x0 = mediabox.y0 = 0;
993 mediabox.x1 = 900;
994 mediabox.y1 = 900;
995 }
996 }
997 }
998 break;
999
1000 default:
1001 ARSERT (0 && state.type);
1002 }
1003
1004 if (state.pagedimcount == 0
1005 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1006 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1007 size_t size;
1008
1009 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1010 state.pagedims = realloc (state.pagedims, size);
1011 if (!state.pagedims) {
1012 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1013 size, state.pagedimcount + 1);
1014 }
1015
1016 p = &state.pagedims[state.pagedimcount++];
1017 p->rotate = rotate;
1018 p->mediabox = mediabox;
1019 p->pageno = pageno;
1020 }
1021 }
1022 end = now ();
1023 if (state.trimmargins) {
1024 printd ("progress 1 Trimmed %d pages in %f seconds",
1025 state.pagecount, end - start);
1026 }
1027 else {
1028 printd ("vmsg Processed %d pages in %f seconds",
1029 state.pagecount, end - start);
1030 }
1031 state.trimanew = 0;
1032 if (trimf) {
1033 if (fclose (trimf)) {
1034 err (1, "fclose");
1035 }
1036 }
1037 }
1038
1039 static void layout (void)
1040 {
1041 int pindex;
1042 fz_rect box;
1043 fz_matrix ctm;
1044 double zoom, w, maxw = 0;
1045 struct pagedim *p = state.pagedims;
1046
1047 if (state.proportional) {
1048 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1049 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1050 p->mediabox);
1051 w = box.x1 - box.x0;
1052 maxw = MAX (w, maxw);
1053 }
1054 }
1055
1056 p = state.pagedims;
1057 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1058 fz_bbox bbox;
1059
1060 ctm = fz_rotate (state.rotate);
1061 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1062 p->mediabox);
1063 w = box.x1 - box.x0;
1064
1065 if (state.proportional) {
1066 double scale = w / maxw;
1067 zoom = (state.w / w) * scale;
1068 }
1069 else {
1070 zoom = state.w / w;
1071 }
1072
1073 p->zoomctm = fz_scale (zoom, zoom);
1074 ctm = fz_concat (p->zoomctm, ctm);
1075
1076 p->pagebox = fz_transform_rect (fz_rotate (p->rotate), p->mediabox);
1077 p->pagebox.x1 -= p->pagebox.x0;
1078 p->pagebox.y1 -= p->pagebox.y0;
1079 p->pagebox.x0 = 0;
1080 p->pagebox.y0 = 0;
1081 bbox = fz_round_rect (fz_transform_rect (ctm, p->pagebox));
1082
1083 p->bounds = bbox;
1084 p->left = state.proportional ? ((maxw - w) * zoom) / 2.0 : 0;
1085 p->ctm = ctm;
1086
1087 ctm = fz_identity;
1088 ctm = fz_concat (ctm, fz_translate (0, -p->mediabox.y1));
1089 ctm = fz_concat (ctm, fz_scale (zoom, -zoom));
1090 ctm = fz_concat (ctm, fz_rotate (p->rotate + state.rotate));
1091 p->lctm = ctm;
1092
1093 p->tctmready = 0;
1094 }
1095
1096 while (p-- != state.pagedims) {
1097 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1098 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1099 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1100 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1101 int w = x1 - x0;
1102 int h = y1 - y0;
1103
1104 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1105 }
1106 }
1107
1108 static void recurse_outline (fz_outline *outline, int level)
1109 {
1110 while (outline) {
1111 fz_link_dest *dest;
1112 int i, top = 0;
1113 struct pagedim *pdim = state.pagedims;
1114
1115 dest = &outline->dest;
1116 for (i = 0; i < state.pagedimcount; ++i) {
1117 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1118 break;
1119 pdim = &state.pagedims[i];
1120 }
1121 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1122 fz_point p;
1123 p.x = 0;
1124 p.y = dest->ld.gotor.lt.y;
1125 p = fz_transform_point (pdim->lctm, p);
1126 top = p.y;
1127 }
1128 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1129 int h;
1130 double y0, y1;
1131
1132 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1133 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1134 h = y1 - y0;
1135 printd ("o %d %d %d %d %s",
1136 level, dest->ld.gotor.page, top, h, outline->title);
1137 }
1138 if (outline->down) {
1139 recurse_outline (outline->down, level + 1);
1140 }
1141 outline = outline->next;
1142 }
1143 }
1144
1145 static void process_outline (void)
1146 {
1147 fz_outline *outline;
1148
1149 if (!state.needoutline) return;
1150
1151 state.needoutline = 0;
1152 switch (state.type) {
1153 case DPDF:
1154 outline = pdf_load_outline (state.u.pdf);
1155 break;
1156 case DXPS:
1157 outline = xps_load_outline (state.u.xps);
1158 break;
1159 default:
1160 outline = NULL;
1161 break;
1162 }
1163 if (outline) {
1164 recurse_outline (outline, 0);
1165 fz_free_outline (state.ctx, outline);
1166 }
1167 }
1168
1169 static char *strofspan (fz_text_span *span)
1170 {
1171 char *p;
1172 char utf8[10];
1173 fz_text_char *ch;
1174 size_t size = 0, cap = 80;
1175
1176 p = malloc (cap + 1);
1177 if (!p) return NULL;
1178
1179 for (ch = span->text; ch < span->text + span->len; ++ch) {
1180 int n = fz_runetochar (utf8, ch->c);
1181 if (size + n > cap) {
1182 cap *= 2;
1183 p = realloc (p, cap + 1);
1184 if (!p) return NULL;
1185 }
1186
1187 memcpy (p + size, utf8, n);
1188 size += n;
1189 }
1190 p[size] = 0;
1191 return p;
1192 }
1193
1194 static int matchspan (regex_t *re, fz_text_span *span, fz_matrix ctm,
1195 int stop, int pageno, double start)
1196 {
1197 int ret;
1198 char *p;
1199 regmatch_t rm;
1200 int a, b, c;
1201 fz_rect *sb, *eb;
1202 fz_point p1, p2, p3, p4;
1203
1204 p = strofspan (span);
1205 if (!p) return -1;
1206
1207 ret = regexec (re, p, 1, &rm, 0);
1208 if (ret) {
1209 free (p);
1210 if (ret != REG_NOMATCH) {
1211 size_t size;
1212 char errbuf[80];
1213 size = regerror (ret, re, errbuf, sizeof (errbuf));
1214 printd ("msg regexec error `%.*s'",
1215 (int) size, errbuf);
1216 return -1;
1217 }
1218 return 0;
1219 }
1220 else {
1221 int l = span->len;
1222 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1223 c += fz_runelen (span->text[a].c);
1224 }
1225 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1226 c += fz_runelen (span->text[b].c);
1227 }
1228
1229 if (fz_runelen (span->text[b].c) > 1) {
1230 b = MAX (0, b-1);
1231 }
1232 sb = &span->text[MIN (a, l-1)].bbox;
1233 eb = &span->text[MIN (b, l-1)].bbox;
1234
1235 p1.x = sb->x0;
1236 p1.y = sb->y0;
1237 p2.x = eb->x1;
1238 p2.y = sb->y0;
1239 p3.x = eb->x1;
1240 p3.y = eb->y1;
1241 p4.x = sb->x0;
1242 p4.y = eb->y1;
1243
1244 if (!stop) {
1245 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1246 pageno, 1,
1247 p1.x, p1.y,
1248 p2.x, p2.y,
1249 p3.x, p3.y,
1250 p4.x, p4.y);
1251
1252 printd ("progress 1 found at %d `%.*s' in %f sec",
1253 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1254 now () - start);
1255 }
1256 else {
1257 printd ("match %d %d %f %f %f %f %f %f %f %f",
1258 pageno, 2,
1259 p1.x, p1.y,
1260 p2.x, p2.y,
1261 p3.x, p3.y,
1262 p4.x, p4.y);
1263 }
1264 free (p);
1265 return 1;
1266 }
1267 }
1268
1269 static int compareblocks (const void *l, const void *r)
1270 {
1271 fz_text_block const *ls = l;
1272 fz_text_block const* rs = r;
1273 return ls->bbox.y0 - rs->bbox.y0;
1274 }
1275
1276 /* wishful thinking function */
1277 static void search (regex_t *re, int pageno, int y, int forward)
1278 {
1279 int i, j;
1280 fz_matrix ctm;
1281 fz_device *tdev;
1282 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1283 fz_text_page *text;
1284 fz_text_sheet *sheet;
1285 struct pagedim *pdim, *pdimprev;
1286 int stop = 0, niters = 0;
1287 double start, end;
1288
1289 if (!(state.type == DPDF || state.type == DXPS))
1290 return;
1291
1292 start = now ();
1293 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1294 if (niters++ == 5) {
1295 niters = 0;
1296 if (hasdata ()) {
1297 printd ("progress 1 attention requested aborting search at %d",
1298 pageno);
1299 stop = 1;
1300 }
1301 else {
1302 printd ("progress %f searching in page %d",
1303 (double) (pageno + 1) / state.pagecount,
1304 pageno);
1305 }
1306 }
1307 pdimprev = NULL;
1308 for (i = 0; i < state.pagedimcount; ++i) {
1309 pdim = &state.pagedims[i];
1310 if (pdim->pageno == pageno) {
1311 goto found;
1312 }
1313 if (pdim->pageno > pageno) {
1314 pdim = pdimprev;
1315 goto found;
1316 }
1317 pdimprev = pdim;
1318 }
1319 pdim = pdimprev;
1320 found:
1321
1322 sheet = fz_new_text_sheet (state.ctx);
1323 text = fz_new_text_page (state.ctx, fz_infinite_rect);
1324 tdev = fz_new_text_device (state.ctx, sheet, text);
1325
1326 switch (state.type) {
1327 case DPDF:
1328 u.ptr = NULL;
1329 fz_try (state.ctx) {
1330 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1331 trimctm (u.pdfpage, pdim - state.pagedims);
1332 ctm = fz_concat (pdim->tctm, pdim->zoomctm);
1333 pdf_run_page (state.u.pdf, u.pdfpage, tdev, ctm, NULL);
1334 }
1335 fz_catch (state.ctx) {
1336 fz_free_device (tdev);
1337 u.ptr = NULL;
1338 goto nextiter;
1339 }
1340 break;
1341
1342 case DXPS:
1343 u.xpspage = xps_load_page (state.u.xps, pageno);
1344 ctm = pdim->ctm;
1345 xps_run_page (state.u.xps, u.xpspage, tdev, ctm, NULL);
1346 break;
1347
1348 default:
1349 ARSERT (0 && state.type);
1350 }
1351
1352 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1353 fz_free_device (tdev);
1354
1355 for (j = 0; j < text->len; ++j) {
1356 int k;
1357 fz_text_block *block;
1358
1359 block = &text->blocks[forward ? j : text->len - 1 - j];
1360
1361 for (k = 0; k < block->len; ++k) {
1362 fz_text_line *line;
1363 fz_text_span *span;
1364
1365 if (forward) {
1366 line = &block->lines[k];
1367 if (line->bbox.y0 < y + 1) continue;
1368 }
1369 else {
1370 line = &block->lines[block->len - 1 - k];
1371 if (line->bbox.y0 > y - 1) continue;
1372 }
1373
1374 for (span = line->spans;
1375 span < line->spans + line->len;
1376 ++span) {
1377
1378 switch (matchspan (re, span, ctm, stop, pageno, start)) {
1379 case 0: break;
1380 case 1: stop = 1; break;
1381 case -1: stop = 1; goto endloop;
1382 }
1383 }
1384 }
1385 }
1386 nextiter:
1387 if (forward) {
1388 pageno += 1;
1389 y = 0;
1390 }
1391 else {
1392 pageno -= 1;
1393 y = INT_MAX;
1394 }
1395 endloop:
1396 fz_free_text_page (state.ctx, text);
1397 fz_free_text_sheet (state.ctx, sheet);
1398 if (u.ptr) {
1399 state.freepage (u.ptr);
1400 }
1401 }
1402 end = now ();
1403 if (!stop) {
1404 printd ("progress 1 no matches %f sec", end - start);
1405 }
1406 printd ("clearrects");
1407 }
1408
1409 static void set_tex_params (int colorspace)
1410 {
1411 union {
1412 unsigned char b;
1413 unsigned int s;
1414 } endianness = {1};
1415
1416 switch (colorspace) {
1417 case 0:
1418 state.texiform = GL_RGBA8;
1419 state.texform = GL_RGBA;
1420 state.texty = GL_UNSIGNED_BYTE;
1421 state.colorspace = fz_device_rgb;
1422 break;
1423 case 1:
1424 state.texiform = GL_RGBA8;
1425 state.texform = GL_BGRA;
1426 state.texty = endianness.s > 1
1427 ? GL_UNSIGNED_INT_8_8_8_8
1428 : GL_UNSIGNED_INT_8_8_8_8_REV;
1429 state.colorspace = fz_device_bgr;
1430 break;
1431 case 2:
1432 state.texiform = GL_LUMINANCE_ALPHA;
1433 state.texform = GL_LUMINANCE_ALPHA;
1434 state.texty = GL_UNSIGNED_BYTE;
1435 state.colorspace = fz_device_gray;
1436 break;
1437 default:
1438 errx (1, "invalid colorspce %d", colorspace);
1439 }
1440 }
1441
1442 static void realloctexts (int texcount)
1443 {
1444 size_t size;
1445
1446 if (texcount == state.texcount) return;
1447
1448 if (texcount < state.texcount) {
1449 glDeleteTextures (state.texcount - texcount,
1450 state.texids + texcount);
1451 }
1452
1453 size = texcount * sizeof (*state.texids);
1454 state.texids = realloc (state.texids, size);
1455 if (!state.texids) {
1456 err (1, "realloc texids %" FMT_s, size);
1457 }
1458
1459 size = texcount * sizeof (*state.texowners);
1460 state.texowners = realloc (state.texowners, size);
1461 if (!state.texowners) {
1462 err (1, "realloc texowners %" FMT_s, size);
1463 }
1464 if (texcount > state.texcount) {
1465 int i;
1466
1467 glGenTextures (texcount - state.texcount,
1468 state.texids + state.texcount);
1469 for (i = state.texcount; i < texcount; ++i) {
1470 state.texowners[i].w = -1;
1471 state.texowners[i].slice = NULL;
1472 }
1473 }
1474 state.texcount = texcount;
1475 state.texindex = 0;
1476 }
1477
1478 static void * mainloop (void *unused)
1479 {
1480 char *p = NULL;
1481 int len, ret, oldlen = 0;
1482
1483 for (;;) {
1484 len = readlen ();
1485 if (len == 0) {
1486 errx (1, "readlen returned 0");
1487 }
1488
1489 if (oldlen < len + 1) {
1490 p = realloc (p, len + 1);
1491 if (!p) {
1492 err (1, "realloc %d failed", len + 1);
1493 }
1494 oldlen = len + 1;
1495 }
1496 readdata (p, len);
1497 p[len] = 0;
1498
1499 if (!strncmp ("open", p, 4)) {
1500 size_t filenamelen;
1501 char *password;
1502 char *filename = p + 5;
1503
1504 filenamelen = strlen (filename);
1505 password = filename + filenamelen + 1;
1506
1507 openxref (filename, password);
1508 pdfinfo ();
1509 initpdims ();
1510 printd ("msg Opened %s (press h/F1 to get help)", filename);
1511 state.needoutline = 1;
1512 }
1513 else if (!strncmp ("cs", p, 2)) {
1514 int i, colorspace;
1515
1516 ret = sscanf (p + 2, " %d", &colorspace);
1517 if (ret != 1) {
1518 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1519 }
1520 lock ("cs");
1521 set_tex_params (colorspace);
1522 for (i = 0; i < state.texcount; ++i) {
1523 state.texowners[i].w = -1;
1524 state.texowners[i].slice = NULL;
1525 }
1526 unlock ("cs");
1527 }
1528 else if (!strncmp ("freepage", p, 8)) {
1529 void *ptr;
1530
1531 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1532 if (ret != 1) {
1533 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1534 }
1535 freepage (ptr);
1536 }
1537 else if (!strncmp ("freetile", p, 8)) {
1538 void *ptr;
1539
1540 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1541 if (ret != 1) {
1542 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1543 }
1544 freetile (ptr);
1545 }
1546 else if (!strncmp ("search", p, 6)) {
1547 int icase, pageno, y, ret, len2, forward;
1548 char *pattern;
1549 regex_t re;
1550
1551 ret = sscanf (p + 6, " %d %d %d %d,%n",
1552 &icase, &pageno, &y, &forward, &len2);
1553 if (ret != 4) {
1554 errx (1, "malformed search `%s' ret=%d", p, ret);
1555 }
1556
1557 pattern = p + 6 + len2;
1558 ret = regcomp (&re, pattern,
1559 REG_EXTENDED | (icase ? REG_ICASE : 0));
1560 if (ret) {
1561 char errbuf[80];
1562 size_t size;
1563
1564 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1565 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1566 }
1567 else {
1568 search (&re, pageno, y, forward);
1569 regfree (&re);
1570 }
1571 }
1572 else if (!strncmp ("geometry", p, 8)) {
1573 int w, h;
1574
1575 printd ("clear");
1576 ret = sscanf (p + 8, " %d %d", &w, &h);
1577 if (ret != 2) {
1578 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1579 }
1580
1581 lock ("geometry");
1582 state.h = h;
1583 if (w != state.w) {
1584 int i;
1585 state.w = w;
1586 for (i = 0; i < state.texcount; ++i) {
1587 state.texowners[i].slice = NULL;
1588 }
1589 }
1590 layout ();
1591 process_outline ();
1592 state.gen++;
1593 unlock ("geometry");
1594 printd ("continue %d", state.pagecount);
1595 }
1596 else if (!strncmp ("reqlayout", p, 9)) {
1597 int rotate, proportional;
1598
1599 printd ("clear");
1600 ret = sscanf (p + 9, " %d %d", &rotate, &proportional);
1601 if (ret != 2) {
1602 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1603 }
1604 lock ("reqlayout");
1605 if (state.rotate != rotate || state.proportional != proportional) {
1606 state.gen += 1;
1607 }
1608 state.rotate = rotate;
1609 state.proportional = proportional;
1610 layout ();
1611 process_outline ();
1612 state.gen++;
1613 unlock ("reqlayout");
1614 printd ("continue %d", state.pagecount);
1615 }
1616 else if (!strncmp ("page", p, 4)) {
1617 double a, b;
1618 struct page *page;
1619 int pageno, pindex, ret;
1620
1621 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1622 if (ret != 2) {
1623 errx (1, "bad render line `%.*s' ret=%d", len, p, ret);
1624 }
1625
1626 lock ("page");
1627 a = now ();
1628 page = loadpage (pageno, pindex);
1629 b = now ();
1630 unlock ("page");
1631
1632 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
1633 }
1634 else if (!strncmp ("tile", p, 4)) {
1635 int x, y, w, h, ret;
1636 struct page *page;
1637 struct tile *tile;
1638 double a, b;
1639
1640 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d",
1641 FMT_ptr_cast (&page), &x, &y, &w, &h);
1642 if (ret != 5) {
1643 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
1644 }
1645
1646 lock ("tile");
1647 a = now ();
1648 tile = rendertile (page, x, y, w, h);
1649 b = now ();
1650 unlock ("tile");
1651
1652 printd ("tile %d %d %" FMT_ptr " %u %f",
1653 x, y,
1654 FMT_ptr_cast2 (tile),
1655 tile->w * tile->h * tile->pixmap->n,
1656 b - a);
1657 }
1658 else if (!strncmp ("settrim", p, 7)) {
1659 int trimmargins;
1660 fz_bbox fuzz;
1661
1662 ret = sscanf (p + 7, " %d %d %d %d %d", &trimmargins,
1663 &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
1664 if (ret != 5) {
1665 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
1666 }
1667 printd ("clear");
1668 lock ("settrim");
1669 state.trimmargins = trimmargins;
1670 state.needoutline = 1;
1671 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
1672 state.trimanew = 1;
1673 state.trimfuzz = fuzz;
1674 }
1675 state.pagedimcount = 0;
1676 free (state.pagedims);
1677 state.pagedims = NULL;
1678 initpdims ();
1679 layout ();
1680 process_outline ();
1681 unlock ("settrim");
1682 printd ("continue %d", state.pagecount);
1683 }
1684 else if (!strncmp ("sliceh", p, 6)) {
1685 int h;
1686
1687 ret = sscanf (p + 6, " %d", &h);
1688 if (ret != 1) {
1689 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
1690 }
1691 if (h != state.sliceheight) {
1692 int i;
1693
1694 state.sliceheight = h;
1695 for (i = 0; i < state.texcount; ++i) {
1696 state.texowners[i].w = -1;
1697 state.texowners[i].h = -1;
1698 state.texowners[i].slice = NULL;
1699 }
1700 }
1701 }
1702 else if (!strncmp ("interrupt", p, 9)) {
1703 printd ("vmsg interrupted");
1704 }
1705 else {
1706 errx (1, "unknown command %.*s", len, p);
1707 }
1708 }
1709 return 0;
1710 }
1711
1712 CAMLprim value ml_realloctexts (value texcount_v)
1713 {
1714 CAMLparam1 (texcount_v);
1715 int ok;
1716
1717 if (trylock ("ml_realloctexts")) {
1718 ok = 0;
1719 goto done;
1720 }
1721 realloctexts (Int_val (texcount_v));
1722 ok = 1;
1723 unlock ("ml_realloctexts");
1724
1725 done:
1726 CAMLreturn (Val_bool (ok));
1727 }
1728
1729 static void showsel (struct page *page, int ox, int oy)
1730 {
1731 int seen = 0;
1732 fz_bbox bbox;
1733 fz_text_line *line;
1734 fz_text_span *span;
1735 fz_text_block *block;
1736 struct mark first, last;
1737
1738 first = page->fmark;
1739 last = page->lmark;
1740
1741 if (!first.span || !last.span) return;
1742
1743 glEnable (GL_BLEND);
1744 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
1745 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
1746
1747 ox += state.pagedims[page->pdimno].bounds.x0;
1748 oy += state.pagedims[page->pdimno].bounds.y0;
1749 for (block = page->text->blocks;
1750 block < page->text->blocks + page->text->len;
1751 ++block) {
1752 for (line = block->lines;
1753 line < block->lines + block->len;
1754 ++line) {
1755 for (span = line->spans;
1756 span < line->spans + line->len;
1757 ++span) {
1758 int i, j, k;
1759
1760 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
1761
1762 j = 0;
1763 k = span->len - 1;
1764
1765 if (span == page->fmark.span && span == page->lmark.span) {
1766 seen = 1;
1767 j = MIN (first.i, last.i);
1768 k = MAX (first.i, last.i);
1769 }
1770 else if (span == first.span) {
1771 seen = 1;
1772 j = first.i;
1773 }
1774 else if (span == last.span) {
1775 seen = 1;
1776 k = last.i;
1777 }
1778
1779 if (seen) {
1780 for (i = j; i <= k; ++i) {
1781 fz_bbox b = fz_round_rect (span->text[i].bbox);
1782 bbox = fz_union_bbox (bbox, b);
1783 }
1784 lprintf ("%d %d %d %d oy=%d ox=%d\n",
1785 bbox.x0,
1786 bbox.y0,
1787 bbox.x1,
1788 bbox.y1,
1789 oy, ox);
1790
1791 glRecti (bbox.x0 + ox, bbox.y0 + oy,
1792 bbox.x1 + ox, bbox.y1 + oy);
1793 if (span == last.span) {
1794 goto done;
1795 }
1796 }
1797 }
1798 }
1799 }
1800 done:
1801 glDisable (GL_BLEND);
1802 }
1803
1804 #include "glfont.c"
1805
1806 static void highlightlinks (struct page *page, int xoff, int yoff)
1807 {
1808 fz_matrix ctm;
1809 fz_link *link, *links;
1810
1811 switch (page->type) {
1812 case DPDF:
1813 links = page->u.pdfpage->links;
1814 break;
1815
1816 case DXPS:
1817 links = page->u.xpspage->links;
1818 break;
1819
1820 default:
1821 return;
1822 }
1823
1824 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
1825 glEnable (GL_LINE_STIPPLE);
1826 glLineStipple (0.5, 0xcccc);
1827
1828 xoff -= state.pagedims[page->pdimno].bounds.x0;
1829 yoff -= state.pagedims[page->pdimno].bounds.y0;
1830 ctm = fz_concat (pagectm (page), fz_translate (xoff, yoff));
1831
1832 glBegin (GL_QUADS);
1833 for (link = links; link; link = link->next) {
1834 fz_point p1, p2, p3, p4;
1835
1836 p1.x = link->rect.x0;
1837 p1.y = link->rect.y0;
1838
1839 p2.x = link->rect.x1;
1840 p2.y = link->rect.y0;
1841
1842 p3.x = link->rect.x1;
1843 p3.y = link->rect.y1;
1844
1845 p4.x = link->rect.x0;
1846 p4.y = link->rect.y1;
1847
1848 p1 = fz_transform_point (ctm, p1);
1849 p2 = fz_transform_point (ctm, p2);
1850 p3 = fz_transform_point (ctm, p3);
1851 p4 = fz_transform_point (ctm, p4);
1852
1853 switch (link->dest.kind) {
1854 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
1855 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
1856 default: glColor3ub (0, 0, 0); break;
1857 }
1858
1859 glVertex2f (p1.x, p1.y);
1860 glVertex2f (p2.x, p2.y);
1861 glVertex2f (p3.x, p3.y);
1862 glVertex2f (p4.x, p4.y);
1863 }
1864 glEnd ();
1865
1866 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
1867 glDisable (GL_LINE_STIPPLE);
1868 }
1869
1870 static int compareslinks (const void *l, const void *r)
1871 {
1872 struct slink const *ls = l;
1873 struct slink const *rs = r;
1874 if (ls->bbox.y0 == rs->bbox.y0) {
1875 return rs->bbox.x0 - rs->bbox.x0;
1876 }
1877 return ls->bbox.y0 - rs->bbox.y0;
1878 }
1879
1880 static void droptext (struct page *page)
1881 {
1882 if (page->text) {
1883 fz_free_text_page (state.ctx, page->text);
1884 page->fmark.i = -1;
1885 page->lmark.i = -1;
1886 page->fmark.span = NULL;
1887 page->lmark.span = NULL;
1888 page->text = NULL;
1889 }
1890 if (page->sheet) {
1891 fz_free_text_sheet (state.ctx, page->sheet);
1892 }
1893 }
1894
1895 static void dropslinks (struct page *page)
1896 {
1897 if (page->slinks) {
1898 free (page->slinks);
1899 page->slinks = NULL;
1900 page->slinkcount = 0;
1901 }
1902 }
1903
1904 static void ensureslinks (struct page *page)
1905 {
1906 fz_matrix ctm;
1907 int i, count = 0;
1908 size_t slinksize = sizeof (*page->slinks);
1909 fz_link *link, *links;
1910
1911 if (state.gen != page->sgen) {
1912 dropslinks (page);
1913 page->sgen = state.gen;
1914 }
1915 if (page->slinks) return;
1916
1917 switch (page->type) {
1918 case DPDF:
1919 links = page->u.pdfpage->links;
1920 ctm = fz_concat (trimctm (page->u.pdfpage, page->pdimno),
1921 state.pagedims[page->pdimno].ctm);
1922 break;
1923
1924 case DXPS:
1925 links = page->u.xpspage->links;
1926 ctm = state.pagedims[page->pdimno].ctm;
1927 break;
1928
1929 default:
1930 return;
1931 }
1932
1933 for (link = links; link; link = link->next) {
1934 count++;
1935 }
1936 if (count > 0) {
1937 page->slinkcount = count;
1938 page->slinks = calloc (count, slinksize);
1939 if (!page->slinks) {
1940 err (1, "realloc slinks %d", count);
1941 }
1942
1943 for (i = 0, link = links; link; ++i, link = link->next) {
1944 page->slinks[i].link = link;
1945 page->slinks[i].bbox =
1946 fz_round_rect (fz_transform_rect (ctm, link->rect));
1947 }
1948 qsort (page->slinks, count, slinksize, compareslinks);
1949 }
1950 }
1951
1952 /* slightly tweaked fmt_ulong by D.J. Bernstein */
1953 static void fmt_linkn (char *s, unsigned int u)
1954 {
1955 unsigned int len; unsigned int q;
1956 int zma = 'z' - 'a' + 1;
1957 len = 1; q = u;
1958 while (q > zma - 1) { ++len; q /= zma; }
1959 if (s) {
1960 s += len;
1961 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
1962 /* handles u == 0 */
1963 }
1964 s[len] = 0;
1965 }
1966
1967 static void highlightslinks (struct page *page, int xoff, int yoff,
1968 int noff, char *targ, int tlen, int hfsize)
1969 {
1970 int i;
1971 char buf[40];
1972 struct slink *slink;
1973 double x0, y0, x1, y1, w;
1974
1975 ensureslinks (page);
1976 glColor3ub (0xc3, 0xb0, 0x91);
1977 for (i = 0; i < page->slinkcount; ++i) {
1978 fmt_linkn (buf, i + noff);
1979 if (!tlen || !strncmp (targ, buf, tlen)) {
1980 slink = &page->slinks[i];
1981
1982 x0 = slink->bbox.x0 + xoff - 5;
1983 y1 = slink->bbox.y0 + yoff - 5;
1984 y0 = y1 + 10 + hfsize;
1985 w = measure_string (state.face, hfsize, buf);
1986 x1 = x0 + w + 10;
1987 glRectd (x0, y0, x1, y1);
1988 }
1989 }
1990
1991 glEnable (GL_BLEND);
1992 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1993 glEnable (GL_TEXTURE_2D);
1994 glColor3ub (0, 0, 0);
1995 for (i = 0; i < page->slinkcount; ++i) {
1996 fmt_linkn (buf, i + noff);
1997 if (!tlen || !strncmp (targ, buf, tlen)) {
1998 slink = &page->slinks[i];
1999
2000 x0 = slink->bbox.x0 + xoff;
2001 y0 = slink->bbox.y0 + yoff + hfsize;
2002 draw_string (state.face, hfsize, x0, y0, buf);
2003 }
2004 }
2005 glDisable (GL_TEXTURE_2D);
2006 glDisable (GL_BLEND);
2007 }
2008
2009
2010 static void uploadslice (struct tile *tile, struct slice *slice)
2011 {
2012 int offset;
2013 struct slice *slice1;
2014
2015 offset = 0;
2016 for (slice1 = tile->slices; slice != slice1; slice1++) {
2017 offset += slice1->h * tile->w * tile->pixmap->n;
2018 }
2019 if (slice->texindex != -1 && slice->texindex < state.texcount
2020 && state.texowners[slice->texindex].slice == slice) {
2021 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2022 }
2023 else {
2024 int subimage = 0;
2025 int texindex = state.texindex++ % state.texcount;
2026
2027 if (state.texowners[texindex].w == tile->w) {
2028 if (state.texowners[texindex].h >= slice->h) {
2029 subimage = 1;
2030 }
2031 else {
2032 state.texowners[texindex].h = slice->h;
2033 }
2034 }
2035 else {
2036 state.texowners[texindex].h = slice->h;
2037 }
2038
2039 state.texowners[texindex].w = tile->w;
2040 state.texowners[texindex].slice = slice;
2041 slice->texindex = texindex;
2042
2043 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2044 if (subimage) {
2045 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2046 0,
2047 0,
2048 0,
2049 tile->w,
2050 slice->h,
2051 state.texform,
2052 state.texty,
2053 tile->pixmap->samples+offset
2054 );
2055 }
2056 else {
2057 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2058 0,
2059 state.texiform,
2060 tile->w,
2061 slice->h,
2062 0,
2063 state.texform,
2064 state.texty,
2065 tile->pixmap->samples+offset
2066 );
2067 }
2068 }
2069 }
2070
2071 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2072 {
2073 CAMLparam2 (args_v, ptr_v);
2074 int dispx = Int_val (Field (args_v, 0));
2075 int dispy = Int_val (Field (args_v, 1));
2076 int dispw = Int_val (Field (args_v, 2));
2077 int disph = Int_val (Field (args_v, 3));
2078 int tilex = Int_val (Field (args_v, 4));
2079 int tiley = Int_val (Field (args_v, 5));
2080 char *s = String_val (ptr_v);
2081 struct tile *tile = parse_pointer ("ml_drawtile", s);
2082
2083 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2084 {
2085 int slicey, firstslice;
2086 struct slice *slice;
2087
2088 firstslice = tiley / tile->sliceheight;
2089 slice = &tile->slices[firstslice];
2090 slicey = tiley % tile->sliceheight;
2091
2092 while (disph > 0) {
2093 int dh;
2094
2095 dh = slice->h - slicey;
2096 dh = MIN (disph, dh);
2097 uploadslice (tile, slice);
2098
2099 glBegin (GL_QUADS);
2100 {
2101 glTexCoord2i (tilex, slicey);
2102 glVertex2i (dispx, dispy);
2103
2104 glTexCoord2i (tilex+dispw, slicey);
2105 glVertex2i (dispx+dispw, dispy);
2106
2107 glTexCoord2i (tilex+dispw, slicey+dh);
2108 glVertex2i (dispx+dispw, dispy+dh);
2109
2110 glTexCoord2i (tilex, slicey+dh);
2111 glVertex2i (dispx, dispy+dh);
2112 }
2113 glEnd ();
2114
2115 dispy += dh;
2116 disph -= dh;
2117 slice++;
2118 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2119 slicey = 0;
2120 }
2121 }
2122 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2123 CAMLreturn (Val_unit);
2124 }
2125
2126 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2127 value xoff_v, value yoff_v,
2128 value li_v)
2129 {
2130 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2131 int xoff = Int_val (xoff_v);
2132 int yoff = Int_val (yoff_v);
2133 int noff = Int_val (Field (li_v, 0));
2134 char *targ = String_val (Field (li_v, 1));
2135 int tlen = caml_string_length (Field (li_v, 1));
2136 int hfsize = Int_val (Field (li_v, 2));
2137 char *s = String_val (ptr_v);
2138 int hlmask = Int_val (hlinks_v);
2139 struct page *page = parse_pointer ("ml_postprocess", s);
2140
2141 if (!page->u.ptr) {
2142 /* deal with loadpage failed pages */
2143 goto done;
2144 }
2145
2146 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2147 if (trylock ("ml_postprocess")) {
2148 noff = 0;
2149 goto done;
2150 }
2151 if (hlmask & 2) {
2152 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2153 noff = page->slinkcount;
2154 }
2155 showsel (page, xoff, yoff);
2156 unlock ("ml_postprocess");
2157
2158 done:
2159 CAMLreturn (Val_int (noff));
2160 }
2161
2162 static fz_link *getlink (struct page *page, int x, int y)
2163 {
2164 fz_point p;
2165 fz_matrix ctm;
2166 fz_link *link, *links;
2167
2168 switch (page->type) {
2169 case DPDF:
2170 ctm = trimctm (page->u.pdfpage, page->pdimno);
2171 links = page->u.pdfpage->links;
2172 break;
2173
2174 case DXPS:
2175 ctm = fz_identity;
2176 links = page->u.xpspage->links;
2177 break;
2178
2179 default:
2180 return NULL;
2181 }
2182 p.x = x;
2183 p.y = y;
2184
2185 ctm = fz_concat (ctm, state.pagedims[page->pdimno].ctm);
2186 ctm = fz_invert_matrix (ctm);
2187 p = fz_transform_point (ctm, p);
2188
2189 for (link = links; link; link = link->next) {
2190 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2191 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2192 return link;
2193 }
2194 }
2195 }
2196 return NULL;
2197 }
2198
2199 static void ensuretext (struct page *page)
2200 {
2201 if (state.gen != page->tgen) {
2202 droptext (page);
2203 page->tgen = state.gen;
2204 }
2205 if (!page->text) {
2206 fz_device *tdev;
2207
2208 page->text = fz_new_text_page (state.ctx, fz_infinite_rect);
2209 page->sheet = fz_new_text_sheet (state.ctx);
2210 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2211 fz_run_display_list (page->dlist,
2212 tdev,
2213 pagectm (page),
2214 fz_infinite_bbox, NULL);
2215 qsort (page->text->blocks, page->text->len,
2216 sizeof (*page->text->blocks), compareblocks);
2217 fz_free_device (tdev);
2218 }
2219 }
2220
2221 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2222 {
2223 CAMLparam2 (start_page_v, dir_v);
2224 CAMLlocal1 (ret_v);
2225 int i, dir = Int_val (dir_v);
2226 int start_page = Int_val (start_page_v);
2227 int end_page = dir > 0 ? state.pagecount : -1;
2228
2229 ret_v = Val_int (0);
2230 if (!(state.type == DPDF || state.type == DXPS)) {
2231 goto done;
2232 }
2233
2234 lock ("ml_findpage_with_links");
2235 for (i = start_page + dir; i != end_page; i += dir) {
2236 int found;
2237
2238 switch (state.type) {
2239 case DPDF:
2240 {
2241 pdf_page *page = NULL;
2242
2243 fz_try (state.ctx) {
2244 page = pdf_load_page (state.u.pdf, i);
2245 found = !!page->links;
2246 }
2247 fz_catch (state.ctx) {
2248 found = 0;
2249 }
2250 if (page) {
2251 freepdfpage (page);
2252 }
2253 }
2254 break;
2255 case DXPS:
2256 {
2257 xps_page *page = xps_load_page (state.u.xps, i);
2258 found = !!page->links;
2259 freexpspage (page);
2260 }
2261 break;
2262
2263 default:
2264 ARSERT ("invalid document type");
2265 }
2266
2267 if (found) {
2268 ret_v = caml_alloc_small (1, 1);
2269 Field (ret_v, 0) = Val_int (i);
2270 goto unlock;
2271 }
2272 }
2273 unlock:
2274 unlock ("ml_findpage_with_links");
2275
2276 done:
2277 CAMLreturn (ret_v);
2278 }
2279
2280 enum { dir_first, dir_last};
2281 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2282
2283 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2284 {
2285 CAMLparam2 (ptr_v, dir_v);
2286 CAMLlocal2 (ret_v, pos_v);
2287 struct page *page;
2288 int dirtag, i, slinkindex;
2289 struct slink *found = NULL ,*slink;
2290 char *s = String_val (ptr_v);
2291
2292 page = parse_pointer ("ml_findlink", s);
2293 ret_v = Val_int (0);
2294 if (trylock ("ml_findlink")) {
2295 goto done;
2296 }
2297
2298 ensureslinks (page);
2299
2300 if (Is_block (dir_v)) {
2301 dirtag = Tag_val (dir_v);
2302 switch (dirtag) {
2303 case dir_first_visible:
2304 {
2305 int x0, y0, dir, first_index, last_index;
2306
2307 pos_v = Field (dir_v, 0);
2308 x0 = Int_val (Field (pos_v, 0));
2309 y0 = Int_val (Field (pos_v, 1));
2310 dir = Int_val (Field (pos_v, 2));
2311
2312 if (dir >= 0) {
2313 dir = 1;
2314 first_index = 0;
2315 last_index = page->slinkcount;
2316 }
2317 else {
2318 first_index = page->slinkcount - 1;
2319 last_index = -1;
2320 }
2321
2322 for (i = first_index; i != last_index; i += dir) {
2323 slink = &page->slinks[i];
2324 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2325 found = slink;
2326 break;
2327 }
2328 }
2329 }
2330 break;
2331
2332 case dir_left:
2333 slinkindex = Int_val (Field (dir_v, 0));
2334 found = &page->slinks[slinkindex];
2335 for (i = slinkindex - 1; i >= 0; --i) {
2336 slink = &page->slinks[i];
2337 if (slink->bbox.x0 < found->bbox.x0) {
2338 found = slink;
2339 break;
2340 }
2341 }
2342 break;
2343
2344 case dir_right:
2345 slinkindex = Int_val (Field (dir_v, 0));
2346 found = &page->slinks[slinkindex];
2347 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2348 slink = &page->slinks[i];
2349 if (slink->bbox.x0 > found->bbox.x0) {
2350 found = slink;
2351 break;
2352 }
2353 }
2354 break;
2355
2356 case dir_down:
2357 slinkindex = Int_val (Field (dir_v, 0));
2358 found = &page->slinks[slinkindex];
2359 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2360 slink = &page->slinks[i];
2361 if (slink->bbox.y0 >= found->bbox.y0) {
2362 found = slink;
2363 break;
2364 }
2365 }
2366 break;
2367
2368 case dir_up:
2369 slinkindex = Int_val (Field (dir_v, 0));
2370 found = &page->slinks[slinkindex];
2371 for (i = slinkindex - 1; i >= 0; --i) {
2372 slink = &page->slinks[i];
2373 if (slink->bbox.y0 <= found->bbox.y0) {
2374 found = slink;
2375 break;
2376 }
2377 }
2378 break;
2379 }
2380 }
2381 else {
2382 dirtag = Int_val (dir_v);
2383 switch (dirtag) {
2384 case dir_first:
2385 found = page->slinks;
2386 break;
2387
2388 case dir_last:
2389 if (page->slinks) {
2390 found = page->slinks + (page->slinkcount - 1);
2391 }
2392 break;
2393 }
2394 }
2395 if (found) {
2396 ret_v = caml_alloc_small (2, 1);
2397 Field (ret_v, 0) = Val_int (found - page->slinks);
2398 }
2399
2400 unlock ("ml_findlink");
2401 done:
2402 CAMLreturn (ret_v);
2403 }
2404
2405 enum { uuri, ugoto, utext, uunexpected, ulaunch, unamed, uremote };
2406
2407 #define LINKTOVAL \
2408 { \
2409 int pageno; \
2410 \
2411 switch (link->dest.kind) { \
2412 case FZ_LINK_GOTO: \
2413 { \
2414 fz_point p; \
2415 \
2416 pageno = link->dest.ld.gotor.page; \
2417 p.x = 0; \
2418 p.y = 0; \
2419 \
2420 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2421 p.y = link->dest.ld.gotor.lt.y; \
2422 p = fz_transform_point (pdim->lctm, p); \
2423 } \
2424 tup_v = caml_alloc_tuple (2); \
2425 ret_v = caml_alloc_small (1, ugoto); \
2426 Field (tup_v, 0) = Val_int (pageno); \
2427 Field (tup_v, 1) = Val_int (p.y); \
2428 Field (ret_v, 0) = tup_v; \
2429 } \
2430 break; \
2431 \
2432 case FZ_LINK_URI: \
2433 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2434 ret_v = caml_alloc_small (1, uuri); \
2435 Field (ret_v, 0) = str_v; \
2436 break; \
2437 \
2438 case FZ_LINK_LAUNCH: \
2439 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2440 ret_v = caml_alloc_small (1, ulaunch); \
2441 Field (ret_v, 0) = str_v; \
2442 break; \
2443 \
2444 case FZ_LINK_NAMED: \
2445 str_v = caml_copy_string (link->dest.ld.named.named); \
2446 ret_v = caml_alloc_small (1, unamed); \
2447 Field (ret_v, 0) = str_v; \
2448 break; \
2449 \
2450 case FZ_LINK_GOTOR: \
2451 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2452 pageno = link->dest.ld.gotor.page; \
2453 tup_v = caml_alloc_tuple (2); \
2454 ret_v = caml_alloc_small (1, uremote); \
2455 Field (tup_v, 0) = str_v; \
2456 Field (tup_v, 1) = Val_int (pageno); \
2457 Field (ret_v, 0) = tup_v; \
2458 break; \
2459 \
2460 default: \
2461 { \
2462 char buf[80]; \
2463 \
2464 snprintf (buf, sizeof (buf), \
2465 "unhandled link kind %d", link->dest.kind); \
2466 str_v = caml_copy_string (buf); \
2467 ret_v = caml_alloc_small (1, uunexpected); \
2468 Field (ret_v, 0) = str_v; \
2469 } \
2470 break; \
2471 } \
2472 }
2473
2474 CAMLprim value ml_getlink (value ptr_v, value n_v)
2475 {
2476 CAMLparam2 (ptr_v, n_v);
2477 CAMLlocal3 (ret_v, tup_v, str_v);
2478 fz_link *link;
2479 struct page *page;
2480 struct pagedim *pdim;
2481 char *s = String_val (ptr_v);
2482
2483 ret_v = Val_int (0);
2484 if (trylock ("ml_getlink")) {
2485 goto done;
2486 }
2487
2488 page = parse_pointer ("ml_getlink", s);
2489 ensureslinks (page);
2490 pdim = &state.pagedims[page->pdimno];
2491 link = page->slinks[Int_val (n_v)].link;
2492 LINKTOVAL;
2493
2494 unlock ("ml_getlink");
2495 done:
2496 CAMLreturn (ret_v);
2497 }
2498
2499 CAMLprim value ml_getlinkcount (value ptr_v)
2500 {
2501 CAMLparam1 (ptr_v);
2502 struct page *page;
2503 char *s = String_val (ptr_v);
2504
2505 page = parse_pointer ("ml_getlinkcount", s);
2506 CAMLreturn (Val_int (page->slinkcount));
2507 }
2508
2509 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
2510 {
2511 CAMLparam2 (ptr_v, n_v);
2512 CAMLlocal1 (ret_v);
2513 struct page *page;
2514 struct slink *slink;
2515 char *s = String_val (ptr_v);
2516
2517 page = parse_pointer ("ml_getlinkrect", s);
2518 ret_v = caml_alloc_tuple (4);
2519 if (trylock ("ml_getlinkrect")) {
2520 Field (ret_v, 0) = Val_int (0);
2521 Field (ret_v, 1) = Val_int (0);
2522 Field (ret_v, 2) = Val_int (0);
2523 Field (ret_v, 3) = Val_int (0);
2524 goto done;
2525 }
2526 ensureslinks (page);
2527
2528 slink = &page->slinks[Int_val (n_v)];
2529 Field (ret_v, 0) = Val_int (slink->bbox.x0);
2530 Field (ret_v, 1) = Val_int (slink->bbox.y0);
2531 Field (ret_v, 2) = Val_int (slink->bbox.x1);
2532 Field (ret_v, 3) = Val_int (slink->bbox.y1);
2533 unlock ("ml_getlinkrect");
2534
2535 done:
2536 CAMLreturn (ret_v);
2537 }
2538
2539 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
2540 {
2541 CAMLparam3 (ptr_v, x_v, y_v);
2542 CAMLlocal3 (ret_v, tup_v, str_v);
2543 fz_link *link;
2544 struct page *page;
2545 char *s = String_val (ptr_v);
2546 int x = Int_val (x_v), y = Int_val (y_v);
2547 struct pagedim *pdim;
2548
2549 ret_v = Val_int (0);
2550 if (trylock ("ml_whatsunder")) {
2551 goto done;
2552 }
2553
2554 page = parse_pointer ("ml_whatsunder", s);
2555 pdim = &state.pagedims[page->pdimno];
2556 x += pdim->bounds.x0;
2557 y += pdim->bounds.y0;
2558 link = getlink (page, x, y);
2559 if (link) {
2560 LINKTOVAL;
2561 }
2562 else {
2563 fz_rect *b;
2564 fz_text_block *block;
2565
2566 ensuretext (page);
2567 for (block = page->text->blocks;
2568 block < page->text->blocks + page->text->len;
2569 ++block) {
2570 fz_text_line *line;
2571
2572 b = &block->bbox;
2573 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2574 continue;
2575
2576 for (line = block->lines;
2577 line < block->lines + block->len;
2578 ++line) {
2579 fz_text_span *span;
2580
2581 b = &line->bbox;
2582 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2583 continue;
2584
2585 for (span = line->spans;
2586 span < line->spans + line->len;
2587 ++span) {
2588 fz_text_char *ch;
2589
2590 b = &span->bbox;
2591 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2592 continue;
2593
2594 for (ch = span->text; ch < span->text + span->len; ++ch) {
2595 b = &ch->bbox;
2596
2597 if (x >= b->x0 && x <= b->x1
2598 && y >= b->y0 && y <= b->y1) {
2599 const char *n2 =
2600 span->style->font && span->style->font->name
2601 ? span->style->font->name
2602 : "Span has no font name"
2603 ;
2604 FT_FaceRec *face = span->style->font->ft_face;
2605 if (face && face->family_name) {
2606 char *s;
2607 char *n1 = face->family_name;
2608 size_t l1 = strlen (n1);
2609 size_t l2 = strlen (n2);
2610
2611 if (l1 != l2 || memcmp (n1, n2, l1)) {
2612 s = malloc (l1 + l2 + 2);
2613 if (s) {
2614 memcpy (s, n2, l2);
2615 s[l2] = '=';
2616 memcpy (s + l2 + 1, n1, l1 + 1);
2617 str_v = caml_copy_string (s);
2618 free (s);
2619 }
2620 }
2621 }
2622 if (str_v == 0) {
2623 str_v = caml_copy_string (n2);
2624 }
2625 ret_v = caml_alloc_small (1, utext);
2626 Field (ret_v, 0) = str_v;
2627 goto unlock;
2628 }
2629 }
2630 }
2631 }
2632 }
2633 }
2634 unlock:
2635 unlock ("ml_whatsunder");
2636
2637 done:
2638 CAMLreturn (ret_v);
2639 }
2640
2641 CAMLprim value ml_seltext (value ptr_v, value rect_v)
2642 {
2643 CAMLparam2 (ptr_v, rect_v);
2644 fz_rect *b;
2645 struct page *page;
2646 struct pagedim *pdim;
2647 int i, x0, x1, y0, y1;
2648 char *s = String_val (ptr_v);
2649 int fi = 0, li = 0;
2650 fz_text_block *block;
2651 fz_text_span *span, *fspan, *lspan;
2652 fz_text_line *line, *fline = NULL, *lline = NULL;
2653
2654 if (trylock ("ml_seltext")) {
2655 goto done;
2656 }
2657
2658 page = parse_pointer ("ml_seltext", s);
2659 ensuretext (page);
2660
2661 pdim = &state.pagedims[page->pdimno];
2662 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;;
2663 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
2664 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
2665 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
2666
2667 if (0) {
2668 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2669 glColor3ub (128, 128, 128);
2670 glRecti (x0, y0, x1, y1);
2671 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2672 }
2673
2674 fspan = lspan = NULL;
2675
2676 for (block = page->text->blocks;
2677 block < page->text->blocks + page->text->len;
2678 ++block) {
2679 for (line = block->lines;
2680 line < block->lines + block->len;
2681 ++line) {
2682 for (span = line->spans;
2683 span < line->spans + line->len;
2684 ++span) {
2685 for (i = 0; i < span->len; ++i) {
2686 b = &span->text[i].bbox;
2687 int selected = 0;
2688
2689 if (x0 >= b->x0 && x0 <= b->x1
2690 && y0 >= b->y0 && y0 <= b->y1) {
2691 fspan = span;
2692 fline = line;
2693 fi = i;
2694 selected = 1;
2695 }
2696 if (x1 >= b->x0 && x1 <= b->x1
2697 && y1 >= b->y0 && y1 <= b->y1) {
2698 lspan = span;
2699 lline = line;
2700 li = i;
2701 selected = 1;
2702 }
2703 if (0 && selected) {
2704 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2705 glColor3ub (128, 128, 128);
2706 glRecti (b->x0, b->y0, b->x1, b->y1);
2707 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2708 }
2709 }
2710 }
2711 }
2712 }
2713 if (y1 < y0 || x1 < x0) {
2714 int swap = 0;
2715
2716 if (fspan == lspan) {
2717 swap = 1;
2718 }
2719 else {
2720 if (y1 < y0) {
2721 if (fline != lline) {
2722 swap = 1;
2723 }
2724 }
2725 }
2726
2727 if (swap) {
2728 i = fi;
2729 span = fspan;
2730
2731 fi = li;
2732 fspan = lspan;
2733
2734 li = i;
2735 lspan = span;
2736 }
2737 }
2738
2739 page->fmark.i = fi;
2740 page->fmark.span = fspan;
2741
2742 page->lmark.i = li;
2743 page->lmark.span = lspan;
2744
2745 unlock ("ml_seltext");
2746
2747 done:
2748 CAMLreturn (Val_unit);
2749 }
2750
2751 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
2752 {
2753 char buf[4];
2754 int i, len, ret;
2755
2756 for (i = a; i <= b; ++i) {
2757 len = fz_runetochar (buf, span->text[i].c);
2758 ret = fwrite (buf, len, 1, f);
2759
2760 if (ret != 1) {
2761 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
2762 len, ret, strerror (errno));
2763 return -1;
2764 }
2765 }
2766 return 0;
2767 }
2768
2769 #ifdef __CYGWIN__
2770 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
2771 {
2772 caml_failwith ("ml_popen not implemented under Cygwin");
2773 }
2774 #else
2775 CAMLprim value ml_popen (value command_v, value fds_v)
2776 {
2777 CAMLparam2 (command_v, fds_v);
2778 CAMLlocal2 (l_v, tup_v);
2779 int ret;
2780 char *msg = NULL;
2781 value earg_v = Nothing;
2782 posix_spawnattr_t attr;
2783 posix_spawn_file_actions_t fa;
2784 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
2785
2786 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
2787 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
2788 }
2789
2790 if ((ret = posix_spawnattr_init (&attr)) != 0) {
2791 msg = "posix_spawnattr_init";
2792 goto fail1;
2793 }
2794
2795 #ifdef POSIX_SPAWN_USEVFORK
2796 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
2797 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
2798 goto fail;
2799 }
2800 #endif
2801
2802 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
2803 int fd1, fd2;
2804
2805 tup_v = Field (l_v, 0);
2806 fd1 = Int_val (Field (tup_v, 0));
2807 fd2 = Int_val (Field (tup_v, 1));
2808 if (fd2 < 0) {
2809 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
2810 msg = "posix_spawn_file_actions_addclose";
2811 earg_v = tup_v;
2812 goto fail;
2813 }
2814 }
2815 else {
2816 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
2817 msg = "posix_spawn_file_actions_adddup2";
2818 earg_v = tup_v;
2819 goto fail;
2820 }
2821 }
2822 }
2823
2824 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
2825 msg = "posix_spawn";
2826 goto fail;
2827 }
2828
2829 fail:
2830 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
2831 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
2832 }
2833
2834 fail1:
2835 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
2836 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
2837 strerror (ret));
2838 }
2839
2840 if (msg)
2841 unix_error (ret, msg, earg_v);
2842
2843 CAMLreturn (Val_unit);
2844 }
2845 #endif
2846
2847 CAMLprim value ml_copysel (value fd_v, value ptr_v)
2848 {
2849 CAMLparam1 (ptr_v);
2850 FILE *f;
2851 int seen = 0;
2852 struct page *page;
2853 fz_text_line *line;
2854 fz_text_span *span;
2855 fz_text_block *block;
2856 int fd = Int_val (fd_v);
2857 char *s = String_val (ptr_v);
2858
2859 if (trylock ("ml_copysel")) {
2860 goto done;
2861 }
2862
2863 page = parse_pointer ("ml_sopysel", s);
2864
2865 if (!page->fmark.span || !page->lmark.span) {
2866 fprintf (stderr, "nothing to copy\n");
2867 goto unlock;
2868 }
2869
2870 f = fdopen (fd, "w");
2871 if (!f) {
2872 fprintf (stderr, "failed to fopen sel pipe: %s\n",
2873 strerror (errno));
2874 f = stdout;
2875 }
2876
2877 for (block = page->text->blocks;
2878 block < page->text->blocks + page->text->len;
2879 ++block) {
2880 for (line = block->lines;
2881 line < block->lines + block->len;
2882 ++line) {
2883 for (span = line->spans;
2884 span < line->spans + line->len;
2885 ++span) {
2886 int a, b;
2887
2888 seen |= span == page->fmark.span || span == page->lmark.span;
2889 a = span == page->fmark.span ? page->fmark.i : 0;
2890 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
2891
2892 if (seen) {
2893 if (pipespan (f, span, a, b)) {
2894 goto close;
2895 }
2896 if (span == line->spans + line->len - 1) {
2897 if (putc ('\n', f) == EOF) {
2898 fprintf (stderr,
2899 "failed break line on sel pipe: %s\n",
2900 strerror (errno));
2901 goto close;
2902 }
2903 }
2904 if (span == page->lmark.span) {
2905 goto endloop;
2906 }
2907 }
2908 }
2909 }
2910 }
2911 endloop:
2912 page->lmark.span = NULL;
2913 page->fmark.span = NULL;
2914
2915 close:
2916 if (f != stdout) {
2917 int ret = fclose (f);
2918 fd = -1;
2919 if (ret == -1) {
2920 if (errno != ECHILD) {
2921 fprintf (stderr, "failed to close sel pipe: %s\n",
2922 strerror (errno));
2923 }
2924 }
2925 }
2926 unlock:
2927 unlock ("ml_copysel");
2928
2929 done:
2930 if (fd >= 0) {
2931 if (close (fd)) {
2932 fprintf (stderr, "failed to close sel pipe: %s\n",
2933 strerror (errno));
2934 }
2935 }
2936 CAMLreturn (Val_unit);
2937 }
2938
2939 CAMLprim value ml_getpdimrect (value pagedimno_v)
2940 {
2941 CAMLparam1 (pagedimno_v);
2942 CAMLlocal1 (ret_v);
2943 int pagedimno = Int_val (pagedimno_v);
2944 fz_rect box;
2945
2946 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
2947 if (trylock ("ml_getpdimrect")) {
2948 box = fz_empty_rect;
2949 }
2950 else {
2951 box = state.pagedims[pagedimno].mediabox;
2952 unlock ("ml_getpdimrect");
2953 }
2954
2955 Store_double_field (ret_v, 0, box.x0);
2956 Store_double_field (ret_v, 1, box.x1);
2957 Store_double_field (ret_v, 2, box.y0);
2958 Store_double_field (ret_v, 3, box.y1);
2959
2960 CAMLreturn (ret_v);
2961 }
2962
2963 static double getmaxw (void)
2964 {
2965 int i;
2966 struct pagedim *p;
2967 double maxw = 0.0;
2968
2969 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2970 double x0, x1, w;
2971
2972 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
2973 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
2974
2975 w = x1 - x0;
2976 maxw = MAX (w, maxw);
2977 }
2978 return maxw;
2979 }
2980
2981 CAMLprim value ml_getmaxw (value unit_v)
2982 {
2983 CAMLparam1 (unit_v);
2984 CAMLlocal1 (ret_v);
2985 double maxw = 0.0;
2986
2987 if (trylock ("ml_getmaxw")) {
2988 goto done;
2989 }
2990 maxw = getmaxw ();
2991 unlock ("ml_getmaxw");
2992 done:
2993 ret_v = caml_copy_double (maxw);
2994 CAMLreturn (ret_v);
2995 }
2996
2997 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
2998 value dw_v, value cols_v)
2999 {
3000 CAMLparam3 (winw_v, winh_v, dw_v);
3001 CAMLlocal1 (ret_v);
3002 int i;
3003 double zoom = 1.0;
3004 double maxw = 0.0, maxh = 0.0;
3005 struct pagedim *p;
3006 double winw = Int_val (winw_v);
3007 double winh = Int_val (winh_v);
3008 double dw = Int_val (dw_v);
3009 double cols = Int_val (cols_v);
3010 double pw = 1.0, ph = 1.0, aspect;
3011
3012 if (trylock ("ml_zoom_for_height")) {
3013 goto done;
3014 }
3015
3016 if (state.proportional) {
3017 maxw = getmaxw () / cols;
3018 }
3019
3020 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3021 double x0, x1, y0, y1, w, h, scaledh, scale;
3022 fz_rect rect;
3023
3024 rect = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
3025 p->mediabox);
3026 x0 = MIN (rect.x0, rect.x1);
3027 x1 = MAX (rect.x0, rect.x1);
3028 y0 = MIN (rect.y0, rect.y1);
3029 y1 = MAX (rect.y0, rect.y1);
3030
3031 w = (x1 - x0) / cols;
3032 h = y1 - y0;
3033
3034 if (state.proportional) {
3035 scale = w / maxw;
3036 scaledh = h * scale;
3037 }
3038 else {
3039 scale = 1.0;
3040 scaledh = h;
3041 }
3042
3043 if (scaledh > maxh) {
3044 maxh = scaledh;
3045 ph = scaledh;
3046 pw = w * scale;
3047 }
3048 }
3049
3050 aspect = pw / ph;
3051 zoom = (winh * aspect + dw) / winw;
3052
3053 unlock ("ml_zoom_for_height");
3054 done:
3055 ret_v = caml_copy_double (zoom);
3056 CAMLreturn (ret_v);
3057 }
3058
3059 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3060 {
3061 CAMLparam4 (pt_v, x_v, y_v, string_v);
3062 CAMLlocal1 (ret_v);
3063 int pt = Int_val(pt_v);
3064 int x = Int_val (x_v);
3065 int y = Int_val (y_v);
3066 double w;
3067
3068 w = draw_string (state.face, pt, x, y, String_val (string_v));
3069 ret_v = caml_copy_double (w);
3070 CAMLreturn (ret_v);
3071 }
3072
3073 CAMLprim value ml_measure_string (value pt_v, value string_v)
3074 {
3075 CAMLparam2 (pt_v, string_v);
3076 CAMLlocal1 (ret_v);
3077 int pt = Int_val (pt_v);
3078 double w;
3079
3080 w = measure_string (state.face, pt, String_val (string_v));
3081 ret_v = caml_copy_double (w);
3082 CAMLreturn (ret_v);
3083 }
3084
3085 CAMLprim value ml_getpagebox (value opaque_v)
3086 {
3087 CAMLparam1 (opaque_v);
3088 CAMLlocal1 (ret_v);
3089 fz_bbox bbox;
3090 fz_device *dev;
3091 char *s = String_val (opaque_v);
3092 struct page *page = parse_pointer ("ml_getpagebox", s);
3093
3094 ret_v = caml_alloc_tuple (4);
3095 dev = fz_new_bbox_device (state.ctx, &bbox);
3096 dev->hints |= FZ_IGNORE_SHADE;
3097
3098 switch (page->type) {
3099 case DPDF:
3100 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, pagectm (page), NULL);
3101 break;
3102
3103 case DXPS:
3104 xps_run_page (state.u.xps, page->u.xpspage, dev, pagectm (page), NULL);
3105 break;
3106
3107 default:
3108 bbox = fz_infinite_bbox;
3109 break;
3110 }
3111
3112 fz_free_device (dev);
3113 Field (ret_v, 0) = Val_int (bbox.x0);
3114 Field (ret_v, 1) = Val_int (bbox.y0);
3115 Field (ret_v, 2) = Val_int (bbox.x1);
3116 Field (ret_v, 3) = Val_int (bbox.y1);
3117
3118 CAMLreturn (ret_v);
3119 }
3120
3121 CAMLprim value ml_setaalevel (value level_v)
3122 {
3123 CAMLparam1 (level_v);
3124
3125 state.aalevel = Int_val (level_v);
3126 CAMLreturn (Val_unit);
3127 }
3128
3129 #undef pixel
3130 #include <X11/Xlib.h>
3131 #include <GL/glx.h>
3132
3133 static struct {
3134 Display *dpy;
3135 GLXContext ctx;
3136 GLXDrawable drawable;
3137 } glx;
3138
3139 #include "keysym2ucs.c"
3140
3141 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3142 {
3143 CAMLparam1 (keysym_v);
3144 CAMLlocal1 (str_v);
3145 KeySym keysym = Int_val (keysym_v);
3146 Rune rune;
3147 int len;
3148 char buf[5];
3149
3150 rune = keysym2ucs (keysym);
3151 len = fz_runetochar (buf, rune);
3152 buf[len] = 0;
3153 str_v = caml_copy_string (buf);
3154 CAMLreturn (str_v);
3155 }
3156
3157 CAMLprim value ml_glx (value win_v)
3158 {
3159 CAMLparam1 (win_v);
3160 XVisualInfo *visual;
3161 int screen, wid = Int_val (win_v);
3162 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3163
3164 glx.dpy = XOpenDisplay (NULL);
3165 if (!glx.dpy) {
3166 caml_failwith ("XOpenDisplay failed");
3167 }
3168
3169 screen = DefaultScreen (glx.dpy);
3170 visual = glXChooseVisual (glx.dpy, screen, attributes);
3171 if (!visual) {
3172 XCloseDisplay (glx.dpy);
3173 glx.dpy = NULL;
3174 caml_failwith ("glXChooseVisual");
3175 }
3176
3177 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3178 XFree (visual);
3179 if (!glx.ctx) {
3180 XCloseDisplay (glx.dpy);
3181 glx.dpy = NULL;
3182 caml_failwith ("glXCreateContext");
3183 }
3184
3185 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3186 glXDestroyContext (glx.dpy, glx.ctx);
3187 XCloseDisplay (glx.dpy);
3188 glx.dpy = NULL;
3189 glx.ctx = NULL;
3190 caml_failwith ("glXMakeCurrent");
3191 }
3192 glx.drawable = wid;
3193
3194 if (0) {
3195 int (*f) (int) =
3196 (int (*) (int)) glXGetProcAddress ((GLubyte *) "glXSwapIntervalMESA");
3197 printf ("sync %d\n", f (0));
3198 }
3199 CAMLreturn (Val_unit);
3200 }
3201
3202 CAMLprim value ml_swapb (value unit_v)
3203 {
3204 CAMLparam1 (unit_v);
3205 glXSwapBuffers (glx.dpy, glx.drawable);
3206 CAMLreturn (Val_unit);
3207 }
3208
3209 CAMLprim value ml_glxsync (value unit_v)
3210 {
3211 CAMLparam1 (unit_v);
3212 if (glx.dpy && glx.ctx) {
3213 glXWaitX ();
3214 glXWaitGL ();
3215 }
3216 CAMLreturn (Val_unit);
3217 }
3218
3219 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3220 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3221
3222 CAMLprim value ml_platform (value unit_v)
3223 {
3224 CAMLparam1 (unit_v);
3225 int platid = piunknown;
3226
3227 #if defined __linux__
3228 platid = pilinux;
3229 #elif defined __CYGWIN__
3230 platid = picygwin;
3231 #elif defined __DragonFly__
3232 platid = pidragonflybsd;
3233 #elif defined __FreeBSD__
3234 platid = pifreebsd;
3235 #elif defined __OpenBSD__
3236 platid = piopenbsd;
3237 #elif defined __NetBSD__
3238 platid = pinetbsd;
3239 #elif defined __sun__
3240 platid = pisun;
3241 #elif defined __APPLE__
3242 platid = piosx;
3243 #endif
3244 CAMLreturn (Val_int (platid));
3245 }
3246
3247 CAMLprim value ml_cloexec (value fd_v)
3248 {
3249 CAMLparam1 (fd_v);
3250 int fd = Int_val (fd_v);
3251
3252 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
3253 uerror ("fcntl", Nothing);
3254 }
3255 CAMLreturn (Val_unit);
3256 }
3257
3258 CAMLprim value ml_init (value pipe_v, value params_v)
3259 {
3260 CAMLparam2 (pipe_v, params_v);
3261 CAMLlocal2 (trim_v, fuzz_v);
3262 int ret;
3263 int texcount;
3264 char *fontpath;
3265 int colorspace;
3266 int mustoresize;
3267 struct sigaction sa;
3268
3269 state.cr = Int_val (Field (pipe_v, 0));
3270 state.cw = Int_val (Field (pipe_v, 1));
3271 state.rotate = Int_val (Field (params_v, 0));
3272 state.proportional = Bool_val (Field (params_v, 1));
3273 trim_v = Field (params_v, 2);
3274 texcount = Int_val (Field (params_v, 3));
3275 state.sliceheight = Int_val (Field (params_v, 4));
3276 mustoresize = Int_val (Field (params_v, 5));
3277 colorspace = Int_val (Field (params_v, 6));
3278 fontpath = String_val (Field (params_v, 7));
3279 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
3280
3281 state.ctx = fz_new_context (NULL, NULL, mustoresize);
3282
3283 state.trimmargins = Bool_val (Field (trim_v, 0));
3284 fuzz_v = Field (trim_v, 1);
3285 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
3286 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
3287 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
3288 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
3289
3290 set_tex_params (colorspace);
3291
3292 if (*fontpath) {
3293 state.face = load_font (fontpath);
3294 }
3295 else {
3296 unsigned int len;
3297 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
3298
3299 state.face = load_builtin_font (base, len);
3300 }
3301 if (!state.face) _exit (1);
3302
3303 realloctexts (texcount);
3304
3305 #ifdef __CYGWIN__
3306 sa.sa_handler = SIG_IGN;
3307 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
3308 #else
3309 sa.sa_handler = SIG_DFL;
3310 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
3311 #endif
3312 if (sigemptyset (&sa.sa_mask)) {
3313 err (1, "sigemptyset");
3314 }
3315 if (sigaction (SIGCHLD, &sa, NULL)) {
3316 err (1, "sigaction");
3317 }
3318
3319 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
3320 if (ret) {
3321 errx (1, "pthread_create: %s", strerror (ret));
3322 }
3323
3324 CAMLreturn (Val_unit);
3325 }
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