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Limit previously changed space/del behavior to presentation mode only
[llpp.git] / link.c
blobb5f9b33cbd789979355de8bf8bb9616f112d3dc0
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 } state;
228
229 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
230 {
231 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
232 }
233
234 static void UNUSED_ATTR debug_bbox (const char *cap, fz_bbox r)
235 {
236 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
237 }
238
239 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
240 {
241 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
242 m.a, m.b, m.c, m.d, m.e, m.f);
243 }
244
245 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
246
247 static void lock (const char *cap)
248 {
249 int ret = pthread_mutex_lock (&mutex);
250 if (ret) {
251 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
252 }
253 }
254
255 static void unlock (const char *cap)
256 {
257 int ret = pthread_mutex_unlock (&mutex);
258 if (ret) {
259 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
260 }
261 }
262
263 static int trylock (const char *cap)
264 {
265 int ret = pthread_mutex_trylock (&mutex);
266 if (ret && ret != EBUSY) {
267 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
268 }
269 return ret == EBUSY;
270 }
271
272 static void *parse_pointer (const char *cap, const char *s)
273 {
274 int ret;
275 void *ptr;
276
277 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
278 if (ret != 1) {
279 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
280 }
281 return ptr;
282 }
283
284 static double now (void)
285 {
286 struct timeval tv;
287
288 if (gettimeofday (&tv, NULL)) {
289 err (1, "gettimeofday");
290 }
291 return tv.tv_sec + tv.tv_usec*1e-6;
292 }
293
294 static int hasdata (void)
295 {
296 int ret, avail;
297 ret = ioctl (state.cr, FIONREAD, &avail);
298 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
299 return avail > 0;
300 }
301
302 CAMLprim value ml_hasdata (value fd_v)
303 {
304 CAMLparam1 (fd_v);
305 int ret, avail;
306
307 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
308 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
309 CAMLreturn (Val_bool (avail > 0));
310 }
311
312 static void readdata (void *p, int size)
313 {
314 ssize_t n;
315
316 again:
317 n = read (state.cr, p, size);
318 if (n < 0) {
319 if (errno == EINTR) goto again;
320 err (1, "read (req %d, ret %zd)", size, n);
321 }
322 if (n - size) {
323 if (!n) errx (1, "EOF while reading");
324 errx (1, "read (req %d, ret %zd)", size, n);
325 }
326 }
327
328 static void writedata (char *p, int size)
329 {
330 char buf[4];
331 ssize_t n;
332
333 buf[0] = (size >> 24) & 0xff;
334 buf[1] = (size >> 16) & 0xff;
335 buf[2] = (size >> 8) & 0xff;
336 buf[3] = (size >> 0) & 0xff;
337
338 n = write (state.cw, buf, 4);
339 if (n != 4) {
340 if (!n) errx (1, "EOF while writing length");
341 err (1, "write %zd", n);
342 }
343
344 n = write (state.cw, p, size);
345 if (n - size) {
346 if (!n) errx (1, "EOF while writing data");
347 err (1, "write (req %d, ret %zd)", size, n);
348 }
349 }
350
351 static int readlen (void)
352 {
353 unsigned char p[4];
354
355 readdata (p, 4);
356 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
357 }
358
359 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
360 {
361 int size = 200, len;
362 va_list ap;
363 char *buf;
364
365 buf = malloc (size);
366 for (;;) {
367 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
368
369 va_start (ap, fmt);
370 len = vsnprintf (buf, size, fmt, ap);
371 va_end (ap);
372
373 if (len > -1 && len < size) {
374 writedata (buf, len);
375 break;
376 }
377
378 if (len > -1) {
379 size = len + 1;
380 }
381 else {
382 size *= 2;
383 }
384 buf = realloc (buf, size);
385 }
386 free (buf);
387 }
388
389 static void closepdf (void)
390 {
391 if (state.u.pdf) {
392 pdf_close_document (state.u.pdf);
393 state.u.pdf = NULL;
394 }
395 }
396
397 static void closexps (void)
398 {
399 if (state.u.xps) {
400 xps_close_document (state.u.xps);
401 state.u.xps = NULL;
402 }
403 }
404
405 static void closecbz (void)
406 {
407 if (state.u.cbz) {
408 cbz_close_document (state.u.cbz);
409 state.u.cbz = NULL;
410 }
411 }
412
413 static void freepdfpage (void *ptr)
414 {
415 pdf_free_page (state.u.pdf, ptr);
416 }
417
418 static void freeemptypdfpage (void *ptr)
419 {
420 (void) ptr;
421 }
422
423 static void freexpspage (void *ptr)
424 {
425 xps_free_page (state.u.xps, ptr);
426 }
427
428 static void freecbzpage (void *ptr)
429 {
430 cbz_free_page (state.u.cbz, ptr);
431 }
432
433 static void openxref (char *filename, char *password)
434 {
435 int i, len;
436
437 for (i = 0; i < state.texcount; ++i) {
438 state.texowners[i].w = -1;
439 state.texowners[i].slice = NULL;
440 }
441
442 if (state.closedoc) state.closedoc ();
443
444 len = strlen (filename);
445
446 state.type = DPDF;
447 if (len > 4) {
448 char ext[4];
449
450 ext[0] = tolower ((int) filename[len-3]);
451 ext[1] = tolower ((int) filename[len-2]);
452 ext[2] = tolower ((int) filename[len-1]);
453
454 /**/ if (ext[0] == 'x' && ext[1] == 'p' && ext[2] == 's') {
455 state.type = DXPS;
456 }
457 else if (ext[0] == 'c' && ext[1] == 'b' && ext[2] == 'z') {
458 state.type = DCBZ;
459 }
460 }
461
462 if (state.pagedims) {
463 free (state.pagedims);
464 state.pagedims = NULL;
465 }
466 state.pagedimcount = 0;
467
468 fz_set_aa_level (state.ctx, state.aalevel);
469 switch (state.type) {
470 case DPDF:
471 state.u.pdf = pdf_open_document (state.ctx, filename);
472 if (pdf_needs_password (state.u.pdf)) {
473 int okay = pdf_authenticate_password (state.u.pdf, password);
474 if (!okay) {
475 errx (1, "invalid password");
476 }
477 }
478 state.pagecount = pdf_count_pages (state.u.pdf);
479 state.closedoc = closepdf;
480 state.freepage = freepdfpage;
481 break;
482
483 case DXPS:
484 state.u.xps = xps_open_document (state.ctx, filename);
485 state.pagecount = xps_count_pages (state.u.xps);
486 state.closedoc = closexps;
487 state.freepage = freexpspage;
488 break;
489
490 case DCBZ:
491 state.u.cbz = cbz_open_document (state.ctx, filename);
492 state.pagecount = cbz_count_pages (state.u.cbz);
493 state.closedoc = closecbz;
494 state.freepage = freecbzpage;
495 break;
496 }
497 }
498
499 static void pdfinfo (void)
500 {
501 if (state.type == DPDF) {
502 pdf_obj *infoobj;
503
504 printd ("info PDF version\t%d.%d",
505 state.u.pdf->version / 10, state.u.pdf->version % 10);
506
507 infoobj = pdf_dict_gets (state.u.pdf->trailer, "Info");
508 if (infoobj) {
509 int i;
510 char *s;
511 char *items[] = { "Title", "Author", "Creator",
512 "Producer", "CreationDate" };
513
514 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
515 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
516 s = pdf_to_utf8 (state.ctx, obj);
517 if (*s) {
518 if (i == 0) {
519 printd ("title %s", s);
520 }
521 printd ("info %s\t%s", items[i], s);
522 }
523 fz_free (state.ctx, s);
524 }
525 }
526 printd ("infoend");
527 }
528 }
529
530 static void unlinktile (struct tile *tile)
531 {
532 int i;
533
534 for (i = 0; i < tile->slicecount; ++i) {
535 struct slice *s = &tile->slices[i];
536
537 if (s->texindex != -1) {
538 if (state.texowners[s->texindex].slice == s) {
539 state.texowners[s->texindex].slice = NULL;
540 }
541 }
542 }
543 }
544
545 static void freepage (struct page *page)
546 {
547 if (page->text) {
548 fz_free_text_page (state.ctx, page->text);
549 }
550 if (page->sheet) {
551 fz_free_text_sheet (state.ctx, page->sheet);
552 }
553 if (page->slinks) {
554 free (page->slinks);
555 }
556 page->freepage (page->u.ptr);
557 fz_free_display_list (state.ctx, page->dlist);
558 free (page);
559 }
560
561 static void freetile (struct tile *tile)
562 {
563 unlinktile (tile);
564 #ifndef PIGGYBACK
565 fz_drop_pixmap (state.ctx, tile->pixmap);
566 #else
567 if (state.pig) {
568 fz_drop_pixmap (state.ctx, state.pig);
569 }
570 state.pig = tile->pixmap;
571 #endif
572 free (tile);
573 }
574
575 #ifdef __ALTIVEC__
576 #include <altivec.h>
577
578 static int cacheline32bytes;
579
580 static void __attribute__ ((constructor)) clcheck (void)
581 {
582 char **envp = environ;
583 unsigned long *auxv;
584
585 while (*envp++);
586
587 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
588 if (*auxv == 19) {
589 cacheline32bytes = auxv[1] == 32;
590 return;
591 }
592 }
593 }
594
595 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
596 {
597 if (cacheline32bytes) {
598 intptr_t a1, a2, diff;
599 size_t sizea, i, size = pixmap->w * pixmap->h * pixmap->n;
600 vector unsigned char v = vec_splat_u8 (-1);
601 vector unsigned char *p;
602
603 a1 = a2 = (intptr_t) pixmap->samples;
604 a2 = (a1 + 31) & ~31;
605 diff = a2 - a1;
606 sizea = size - diff;
607 p = (void *) a2;
608
609 while (a1 != a2) *(char *) a1++ = 0xff;
610 for (i = 0; i < (sizea & ~31); i += 32) {
611 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
612 vec_st (v, i, p);
613 vec_st (v, i + 16, p);
614 }
615 while (i < sizea) *((char *) a1 + i++) = 0xff;
616 }
617 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
618 }
619 #else
620 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
621 #endif
622
623 static fz_matrix trimctm (pdf_page *page, int pindex)
624 {
625 fz_matrix ctm;
626 struct pagedim *pdim = &state.pagedims[pindex];
627
628 if (!pdim->tctmready) {
629 if (state.trimmargins) {
630 fz_rect realbox;
631
632 ctm = fz_concat (fz_rotate (-pdim->rotate), fz_scale (1, -1));
633 realbox = fz_transform_rect (ctm, pdim->mediabox);
634 ctm = fz_concat (ctm, fz_translate (-realbox.x0, -realbox.y0));
635 ctm = fz_concat (fz_invert_matrix (page->ctm), ctm);
636 }
637 else {
638 ctm = fz_identity;
639 }
640 pdim->tctm = ctm;
641 pdim->tctmready = 1;
642 }
643 return pdim->tctm;
644 }
645
646 static fz_matrix pagectm (struct page *page)
647 {
648 if (page->type == DPDF) {
649 return fz_concat (trimctm (page->u.pdfpage, page->pdimno),
650 state.pagedims[page->pdimno].ctm);
651 }
652 else {
653 fz_matrix ctm;
654 struct pagedim *pdim = &state.pagedims[page->pdimno];
655
656 ctm = state.pagedims[page->pdimno].ctm;
657 ctm = fz_concat (fz_translate (-pdim->mediabox.x0,
658 -pdim->mediabox.y0), ctm);
659 return ctm;
660 }
661 }
662
663 static void *loadpage (int pageno, int pindex)
664 {
665 fz_device *dev;
666 struct page *page = NULL;
667
668 page = calloc (sizeof (struct page), 1);
669 if (!page) {
670 err (1, "calloc page %d", pageno);
671 }
672
673 page->dlist = fz_new_display_list (state.ctx);
674 dev = fz_new_list_device (state.ctx, page->dlist);
675 switch (state.type) {
676 case DPDF:
677 fz_try (state.ctx) {
678 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
679 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, fz_identity, NULL);
680 page->freepage = freepdfpage;
681 }
682 fz_catch (state.ctx) {
683 page->u.ptr = NULL;
684 page->freepage = freeemptypdfpage;
685 }
686 break;
687
688 case DXPS:
689 page->u.xpspage = xps_load_page (state.u.xps, pageno);
690 xps_run_page (state.u.xps, page->u.xpspage, dev, fz_identity, NULL);
691 page->freepage = freexpspage;
692 break;
693
694 case DCBZ:
695 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
696 cbz_run_page (state.u.cbz, page->u.cbzpage, dev, fz_identity, NULL);
697 page->freepage = freecbzpage;
698 break;
699 }
700 fz_free_device (dev);
701
702 page->pdimno = pindex;
703 page->pageno = pageno;
704 page->sgen = state.gen;
705 page->tgen = state.gen;
706 page->type = state.type;
707
708 return page;
709 }
710
711 static struct tile *alloctile (int h)
712 {
713 int i;
714 int slicecount;
715 size_t tilesize;
716 struct tile *tile;
717
718 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
719 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
720 tile = calloc (tilesize, 1);
721 if (!tile) {
722 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
723 }
724 for (i = 0; i < slicecount; ++i) {
725 int sh = MIN (h, state.sliceheight);
726 tile->slices[i].h = sh;
727 tile->slices[i].texindex = -1;
728 h -= sh;
729 }
730 tile->slicecount = slicecount;
731 tile->sliceheight = state.sliceheight;
732 return tile;
733 }
734
735 struct obs {
736 int cured;
737 fz_bbox b;
738 };
739
740 static void obs_fill_image (fz_device *dev, fz_image *image, fz_matrix ctm,
741 float alpha)
742 {
743 struct obs *obs = dev->user;
744
745 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
746 fz_bbox b = fz_round_rect (fz_transform_rect (ctm, fz_unit_rect));
747 b = fz_intersect_bbox (b, obs->b);
748 obs->cured = b.x0 == obs->b.x0
749 && b.x1 == obs->b.x1
750 && b.y0 == obs->b.y0
751 && b.y1 == obs->b.y1;
752 }
753 }
754
755 static int obscured (struct page *page, fz_bbox bbox)
756 {
757 fz_device dev;
758 struct obs obs;
759
760 memset (&dev, 0, sizeof (dev));
761 memset (&obs, 0, sizeof (obs));
762 dev.hints = 0;
763 dev.flags = 0;
764 dev.user = &obs;
765 dev.ctx = state.ctx;
766 dev.fill_image = obs_fill_image;
767 obs.b = bbox;
768 fz_run_display_list (page->dlist, &dev, pagectm (page), bbox, NULL);
769 return obs.cured;
770 }
771
772 static struct tile *rendertile (struct page *page, int x, int y, int w, int h)
773 {
774 fz_bbox bbox;
775 fz_device *dev;
776 struct tile *tile;
777 struct pagedim *pdim;
778
779 tile = alloctile (h);
780 pdim = &state.pagedims[page->pdimno];
781
782 bbox = pdim->bounds;
783 bbox.x0 += x;
784 bbox.y0 += y;
785 bbox.x1 = bbox.x0 + w;
786 bbox.y1 = bbox.y0 + h;
787
788 if (state.pig) {
789 if (state.pig->w == w
790 && state.pig->h == h
791 && state.pig->colorspace == state.colorspace) {
792 tile->pixmap = state.pig;
793 tile->pixmap->x = bbox.x0;
794 tile->pixmap->y = bbox.y0;
795 }
796 else {
797 fz_drop_pixmap (state.ctx, state.pig);
798 }
799 state.pig = NULL;
800 }
801 if (!tile->pixmap) {
802 tile->pixmap =
803 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, bbox);
804 }
805
806 tile->w = w;
807 tile->h = h;
808 if (!page->u.ptr || ((w < 128 && h < 128) || !obscured (page, bbox))) {
809 clearpixmap (tile->pixmap);
810 }
811 dev = fz_new_draw_device (state.ctx, tile->pixmap);
812 fz_run_display_list (page->dlist, dev, pagectm (page), bbox, NULL);
813 fz_free_device (dev);
814
815 return tile;
816 }
817
818 static void initpdims (void)
819 {
820 double start, end;
821 int pageno, trim, show;
822
823 start = now ();
824 for (pageno = 0; pageno < state.pagecount; ++pageno) {
825 int rotate = 0;
826 struct pagedim *p;
827 fz_rect mediabox;
828
829 switch (state.type) {
830 case DPDF: {
831 pdf_obj *pageobj = state.u.pdf->page_objs[pageno];
832
833 if (state.trimmargins) {
834 pdf_obj *obj;
835 pdf_page *page;
836
837 fz_try (state.ctx) {
838 page = pdf_load_page (state.u.pdf, pageno);
839 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
840 trim = state.trimanew || !obj;
841 if (trim) {
842 fz_rect rect;
843 fz_bbox bbox;
844 fz_matrix ctm;
845 fz_device *dev;
846
847 dev = fz_new_bbox_device (state.ctx, &bbox);
848 dev->hints |= FZ_IGNORE_SHADE;
849 ctm = fz_invert_matrix (page->ctm);
850 pdf_run_page (state.u.pdf, page, dev, fz_identity, NULL);
851 fz_free_device (dev);
852
853 rect.x0 = bbox.x0 + state.trimfuzz.x0;
854 rect.x1 = bbox.x1 + state.trimfuzz.x1;
855 rect.y0 = bbox.y0 + state.trimfuzz.y0;
856 rect.y1 = bbox.y1 + state.trimfuzz.y1;
857 rect = fz_transform_rect (ctm, rect);
858 rect = fz_intersect_rect (rect, page->mediabox);
859
860 if (fz_is_empty_rect (rect)) {
861 mediabox = page->mediabox;
862 }
863 else {
864 mediabox = rect;
865 }
866
867 obj = pdf_new_array (state.ctx, 4);
868 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x0));
869 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y0));
870 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x1));
871 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y1));
872 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
873 }
874 else {
875 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
876 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
877 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
878 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
879 }
880
881 rotate = page->rotate;
882 pdf_free_page (state.u.pdf, page);
883
884 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
885 if (show) {
886 printd ("progress %f Trimming %d",
887 (double) (pageno + 1) / state.pagecount,
888 pageno + 1);
889 }
890 }
891 fz_catch (state.ctx) {
892 }
893 }
894 else {
895 fz_rect cropbox;
896
897 mediabox = pdf_to_rect (state.ctx,
898 pdf_dict_gets (pageobj, "MediaBox"));
899 if (fz_is_empty_rect (mediabox)) {
900 fprintf (stderr, "cannot find page size for page %d\n",
901 pageno+1);
902 mediabox.x0 = 0;
903 mediabox.y0 = 0;
904 mediabox.x1 = 612;
905 mediabox.y1 = 792;
906 }
907
908 cropbox = pdf_to_rect (state.ctx,
909 pdf_dict_gets (pageobj, "CropBox"));
910 if (!fz_is_empty_rect (cropbox)) {
911 mediabox = fz_intersect_rect (mediabox, cropbox);
912 }
913 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
914 }
915 break;
916 }
917
918 case DXPS:
919 {
920 xps_page *page;
921
922 page = xps_load_page (state.u.xps, pageno);
923 mediabox = xps_bound_page (state.u.xps, page);
924 rotate = 0;
925 if (state.trimmargins) {
926 fz_rect rect;
927 fz_bbox bbox;
928 fz_device *dev;
929
930 dev = fz_new_bbox_device (state.ctx, &bbox);
931 dev->hints |= FZ_IGNORE_SHADE;
932 xps_run_page (state.u.xps, page, dev, fz_identity, NULL);
933 fz_free_device (dev);
934
935 rect.x0 = bbox.x0 + state.trimfuzz.x0;
936 rect.x1 = bbox.x1 + state.trimfuzz.x1;
937 rect.y0 = bbox.y0 + state.trimfuzz.y0;
938 rect.y1 = bbox.y1 + state.trimfuzz.y1;
939 rect = fz_intersect_rect (rect, mediabox);
940
941 if (!fz_is_empty_rect (rect)) {
942 mediabox = rect;
943 }
944 }
945 xps_free_page (state.u.xps, page);
946 printd ("progress %f loading %d",
947 (double) (pageno + 1) / state.pagecount,
948 pageno + 1);
949 }
950 break;
951
952 case DCBZ:
953 {
954 rotate = 0;
955 if (state.trimmargins) {
956 cbz_page *page;
957
958 page = cbz_load_page (state.u.cbz, pageno);
959 mediabox = cbz_bound_page (state.u.cbz, page);
960 cbz_free_page (state.u.cbz, page);
961 printd ("progress %f Trimming %d",
962 (double) (pageno + 1) / state.pagecount,
963 pageno + 1);
964 }
965 else {
966 mediabox.x0 = mediabox.y0 = 0;
967 mediabox.x1 = 900;
968 mediabox.y1 = 900;
969 }
970 }
971 break;
972
973 default:
974 ARSERT (0 && state.type);
975 }
976
977 if (state.pagedimcount == 0
978 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
979 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
980 size_t size;
981
982 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
983 state.pagedims = realloc (state.pagedims, size);
984 if (!state.pagedims) {
985 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
986 size, state.pagedimcount + 1);
987 }
988
989 p = &state.pagedims[state.pagedimcount++];
990 p->rotate = rotate;
991 p->mediabox = mediabox;
992 p->pageno = pageno;
993 }
994 }
995 end = now ();
996 if (state.trimmargins) {
997 printd ("progress 1 Trimmed %d pages in %f seconds",
998 state.pagecount, end - start);
999 }
1000 else {
1001 printd ("vmsg Processed %d pages in %f seconds",
1002 state.pagecount, end - start);
1003 }
1004 state.trimanew = 0;
1005 }
1006
1007 static void layout (void)
1008 {
1009 int pindex;
1010 fz_rect box;
1011 fz_matrix ctm;
1012 double zoom, w, maxw = 0;
1013 struct pagedim *p = state.pagedims;
1014
1015 if (state.proportional) {
1016 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1017 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1018 p->mediabox);
1019 w = box.x1 - box.x0;
1020 maxw = MAX (w, maxw);
1021 }
1022 }
1023
1024 p = state.pagedims;
1025 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
1026 fz_bbox bbox;
1027
1028 ctm = fz_rotate (state.rotate);
1029 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
1030 p->mediabox);
1031 w = box.x1 - box.x0;
1032
1033 if (state.proportional) {
1034 double scale = w / maxw;
1035 zoom = (state.w / w) * scale;
1036 }
1037 else {
1038 zoom = state.w / w;
1039 }
1040
1041 p->zoomctm = fz_scale (zoom, zoom);
1042 ctm = fz_concat (p->zoomctm, ctm);
1043
1044 p->pagebox = fz_transform_rect (fz_rotate (p->rotate), p->mediabox);
1045 p->pagebox.x1 -= p->pagebox.x0;
1046 p->pagebox.y1 -= p->pagebox.y0;
1047 p->pagebox.x0 = 0;
1048 p->pagebox.y0 = 0;
1049 bbox = fz_round_rect (fz_transform_rect (ctm, p->pagebox));
1050
1051 p->bounds = bbox;
1052 p->left = state.proportional ? ((maxw - w) * zoom) / 2.0 : 0;
1053 p->ctm = ctm;
1054
1055 ctm = fz_identity;
1056 ctm = fz_concat (ctm, fz_translate (0, -p->mediabox.y1));
1057 ctm = fz_concat (ctm, fz_scale (zoom, -zoom));
1058 ctm = fz_concat (ctm, fz_rotate (p->rotate + state.rotate));
1059 p->lctm = ctm;
1060
1061 p->tctmready = 0;
1062 }
1063
1064 while (p-- != state.pagedims) {
1065 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1066 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1067 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1068 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1069 int w = x1 - x0;
1070 int h = y1 - y0;
1071
1072 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1073 }
1074 }
1075
1076 static void recurse_outline (fz_outline *outline, int level)
1077 {
1078 while (outline) {
1079 fz_link_dest *dest;
1080 int i, top = 0;
1081 struct pagedim *pdim = state.pagedims;
1082
1083 dest = &outline->dest;
1084 for (i = 0; i < state.pagedimcount; ++i) {
1085 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1086 break;
1087 pdim = &state.pagedims[i];
1088 }
1089 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1090 fz_point p;
1091 p.x = 0;
1092 p.y = dest->ld.gotor.lt.y;
1093 p = fz_transform_point (pdim->lctm, p);
1094 top = p.y;
1095 }
1096 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1097 int h;
1098 double y0, y1;
1099
1100 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1101 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1102 h = y1 - y0;
1103 printd ("o %d %d %d %d %s",
1104 level, dest->ld.gotor.page, top, h, outline->title);
1105 }
1106 if (outline->down) {
1107 recurse_outline (outline->down, level + 1);
1108 }
1109 outline = outline->next;
1110 }
1111 }
1112
1113 static void process_outline (void)
1114 {
1115 fz_outline *outline;
1116
1117 if (!state.needoutline) return;
1118
1119 state.needoutline = 0;
1120 switch (state.type) {
1121 case DPDF:
1122 outline = pdf_load_outline (state.u.pdf);
1123 break;
1124 case DXPS:
1125 outline = xps_load_outline (state.u.xps);
1126 break;
1127 default:
1128 outline = NULL;
1129 break;
1130 }
1131 if (outline) {
1132 recurse_outline (outline, 0);
1133 fz_free_outline (state.ctx, outline);
1134 }
1135 }
1136
1137 static char *strofspan (fz_text_span *span)
1138 {
1139 char *p;
1140 char utf8[10];
1141 fz_text_char *ch;
1142 size_t size = 0, cap = 80;
1143
1144 p = malloc (cap + 1);
1145 if (!p) return NULL;
1146
1147 for (ch = span->text; ch < span->text + span->len; ++ch) {
1148 int n = fz_runetochar (utf8, ch->c);
1149 if (size + n > cap) {
1150 cap *= 2;
1151 p = realloc (p, cap + 1);
1152 if (!p) return NULL;
1153 }
1154
1155 memcpy (p + size, utf8, n);
1156 size += n;
1157 }
1158 p[size] = 0;
1159 return p;
1160 }
1161
1162 static int matchspan (regex_t *re, fz_text_span *span, fz_matrix ctm,
1163 int stop, int pageno, double start)
1164 {
1165 int ret;
1166 char *p;
1167 regmatch_t rm;
1168 int a, b, c;
1169 fz_rect *sb, *eb;
1170 fz_point p1, p2, p3, p4;
1171
1172 p = strofspan (span);
1173 if (!p) return -1;
1174
1175 ret = regexec (re, p, 1, &rm, 0);
1176 if (ret) {
1177 free (p);
1178 if (ret != REG_NOMATCH) {
1179 size_t size;
1180 char errbuf[80];
1181 size = regerror (ret, re, errbuf, sizeof (errbuf));
1182 printd ("msg regexec error `%.*s'",
1183 (int) size, errbuf);
1184 return -1;
1185 }
1186 return 0;
1187 }
1188 else {
1189 int l = span->len;
1190 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1191 c += fz_runelen (span->text[a].c);
1192 }
1193 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1194 c += fz_runelen (span->text[b].c);
1195 }
1196
1197 if (fz_runelen (span->text[b].c) > 1) {
1198 b = MAX (0, b-1);
1199 }
1200 sb = &span->text[MIN (a, l-1)].bbox;
1201 eb = &span->text[MIN (b, l-1)].bbox;
1202
1203 p1.x = sb->x0;
1204 p1.y = sb->y0;
1205 p2.x = eb->x1;
1206 p2.y = sb->y0;
1207 p3.x = eb->x1;
1208 p3.y = eb->y1;
1209 p4.x = sb->x0;
1210 p4.y = eb->y1;
1211
1212 if (!stop) {
1213 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1214 pageno, 1,
1215 p1.x, p1.y,
1216 p2.x, p2.y,
1217 p3.x, p3.y,
1218 p4.x, p4.y);
1219
1220 printd ("progress 1 found at %d `%.*s' in %f sec",
1221 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1222 now () - start);
1223 }
1224 else {
1225 printd ("match %d %d %f %f %f %f %f %f %f %f",
1226 pageno, 2,
1227 p1.x, p1.y,
1228 p2.x, p2.y,
1229 p3.x, p3.y,
1230 p4.x, p4.y);
1231 }
1232 free (p);
1233 return 1;
1234 }
1235 }
1236
1237 static int compareblocks (const void *l, const void *r)
1238 {
1239 fz_text_block const *ls = l;
1240 fz_text_block const* rs = r;
1241 return ls->bbox.y0 - rs->bbox.y0;
1242 }
1243
1244 /* wishful thinking function */
1245 static void search (regex_t *re, int pageno, int y, int forward)
1246 {
1247 int i, j;
1248 fz_matrix ctm;
1249 fz_device *tdev;
1250 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1251 fz_text_page *text;
1252 fz_text_sheet *sheet;
1253 struct pagedim *pdim, *pdimprev;
1254 int stop = 0, niters = 0;
1255 double start, end;
1256
1257 if (!(state.type == DPDF || state.type == DXPS))
1258 return;
1259
1260 start = now ();
1261 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1262 if (niters++ == 5) {
1263 niters = 0;
1264 if (hasdata ()) {
1265 printd ("progress 1 attention requested aborting search at %d",
1266 pageno);
1267 stop = 1;
1268 }
1269 else {
1270 printd ("progress %f searching in page %d",
1271 (double) (pageno + 1) / state.pagecount,
1272 pageno);
1273 }
1274 }
1275 pdimprev = NULL;
1276 for (i = 0; i < state.pagedimcount; ++i) {
1277 pdim = &state.pagedims[i];
1278 if (pdim->pageno == pageno) {
1279 goto found;
1280 }
1281 if (pdim->pageno > pageno) {
1282 pdim = pdimprev;
1283 goto found;
1284 }
1285 pdimprev = pdim;
1286 }
1287 pdim = pdimprev;
1288 found:
1289
1290 sheet = fz_new_text_sheet (state.ctx);
1291 text = fz_new_text_page (state.ctx, fz_infinite_rect);
1292 tdev = fz_new_text_device (state.ctx, sheet, text);
1293
1294 switch (state.type) {
1295 case DPDF:
1296 u.ptr = NULL;
1297 fz_try (state.ctx) {
1298 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1299 trimctm (u.pdfpage, pdim - state.pagedims);
1300 ctm = fz_concat (pdim->tctm, pdim->zoomctm);
1301 pdf_run_page (state.u.pdf, u.pdfpage, tdev, ctm, NULL);
1302 }
1303 fz_catch (state.ctx) {
1304 fz_free_device (tdev);
1305 u.ptr = NULL;
1306 goto nextiter;
1307 }
1308 break;
1309
1310 case DXPS:
1311 u.xpspage = xps_load_page (state.u.xps, pageno);
1312 ctm = pdim->ctm;
1313 xps_run_page (state.u.xps, u.xpspage, tdev, ctm, NULL);
1314 break;
1315
1316 default:
1317 ARSERT (0 && state.type);
1318 }
1319
1320 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1321 fz_free_device (tdev);
1322
1323 for (j = 0; j < text->len; ++j) {
1324 int k;
1325 fz_text_block *block;
1326
1327 block = &text->blocks[forward ? j : text->len - 1 - j];
1328
1329 for (k = 0; k < block->len; ++k) {
1330 fz_text_line *line;
1331 fz_text_span *span;
1332
1333 if (forward) {
1334 line = &block->lines[k];
1335 if (line->bbox.y0 < y + 1) continue;
1336 }
1337 else {
1338 line = &block->lines[block->len - 1 - k];
1339 if (line->bbox.y0 > y - 1) continue;
1340 }
1341
1342 for (span = line->spans;
1343 span < line->spans + line->len;
1344 ++span) {
1345
1346 switch (matchspan (re, span, ctm, stop, pageno, start)) {
1347 case 0: break;
1348 case 1: stop = 1; break;
1349 case -1: stop = 1; goto endloop;
1350 }
1351 }
1352 }
1353 }
1354 nextiter:
1355 if (forward) {
1356 pageno += 1;
1357 y = 0;
1358 }
1359 else {
1360 pageno -= 1;
1361 y = INT_MAX;
1362 }
1363 endloop:
1364 fz_free_text_page (state.ctx, text);
1365 fz_free_text_sheet (state.ctx, sheet);
1366 if (u.ptr) {
1367 state.freepage (u.ptr);
1368 }
1369 }
1370 end = now ();
1371 if (!stop) {
1372 printd ("progress 1 no matches %f sec", end - start);
1373 }
1374 printd ("clearrects");
1375 }
1376
1377 static void set_tex_params (int colorspace)
1378 {
1379 union {
1380 unsigned char b;
1381 unsigned int s;
1382 } endianness = {1};
1383
1384 switch (colorspace) {
1385 case 0:
1386 state.texiform = GL_RGBA8;
1387 state.texform = GL_RGBA;
1388 state.texty = GL_UNSIGNED_BYTE;
1389 state.colorspace = fz_device_rgb;
1390 break;
1391 case 1:
1392 state.texiform = GL_RGBA8;
1393 state.texform = GL_BGRA;
1394 state.texty = endianness.s > 1
1395 ? GL_UNSIGNED_INT_8_8_8_8
1396 : GL_UNSIGNED_INT_8_8_8_8_REV;
1397 state.colorspace = fz_device_bgr;
1398 break;
1399 case 2:
1400 state.texiform = GL_LUMINANCE_ALPHA;
1401 state.texform = GL_LUMINANCE_ALPHA;
1402 state.texty = GL_UNSIGNED_BYTE;
1403 state.colorspace = fz_device_gray;
1404 break;
1405 default:
1406 errx (1, "invalid colorspce %d", colorspace);
1407 }
1408 }
1409
1410 static void realloctexts (int texcount)
1411 {
1412 size_t size;
1413
1414 if (texcount == state.texcount) return;
1415
1416 if (texcount < state.texcount) {
1417 glDeleteTextures (state.texcount - texcount,
1418 state.texids + texcount);
1419 }
1420
1421 size = texcount * sizeof (*state.texids);
1422 state.texids = realloc (state.texids, size);
1423 if (!state.texids) {
1424 err (1, "realloc texids %" FMT_s, size);
1425 }
1426
1427 size = texcount * sizeof (*state.texowners);
1428 state.texowners = realloc (state.texowners, size);
1429 if (!state.texowners) {
1430 err (1, "realloc texowners %" FMT_s, size);
1431 }
1432 if (texcount > state.texcount) {
1433 int i;
1434
1435 glGenTextures (texcount - state.texcount,
1436 state.texids + state.texcount);
1437 for (i = state.texcount; i < texcount; ++i) {
1438 state.texowners[i].w = -1;
1439 state.texowners[i].slice = NULL;
1440 }
1441 }
1442 state.texcount = texcount;
1443 state.texindex = 0;
1444 }
1445
1446 static void * mainloop (void *unused)
1447 {
1448 char *p = NULL;
1449 int len, ret, oldlen = 0;
1450
1451 for (;;) {
1452 len = readlen ();
1453 if (len == 0) {
1454 errx (1, "readlen returned 0");
1455 }
1456
1457 if (oldlen < len + 1) {
1458 p = realloc (p, len + 1);
1459 if (!p) {
1460 err (1, "realloc %d failed", len + 1);
1461 }
1462 oldlen = len + 1;
1463 }
1464 readdata (p, len);
1465 p[len] = 0;
1466
1467 if (!strncmp ("open", p, 4)) {
1468 size_t filenamelen;
1469 char *password;
1470 char *filename = p + 5;
1471
1472 filenamelen = strlen (filename);
1473 password = filename + filenamelen + 1;
1474
1475 openxref (filename, password);
1476 pdfinfo ();
1477 initpdims ();
1478 printd ("msg Opened %s (press h/F1 to get help)", filename);
1479 state.needoutline = 1;
1480 }
1481 else if (!strncmp ("cs", p, 2)) {
1482 int i, colorspace;
1483
1484 ret = sscanf (p + 2, " %d", &colorspace);
1485 if (ret != 1) {
1486 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1487 }
1488 lock ("cs");
1489 set_tex_params (colorspace);
1490 for (i = 0; i < state.texcount; ++i) {
1491 state.texowners[i].w = -1;
1492 state.texowners[i].slice = NULL;
1493 }
1494 unlock ("cs");
1495 }
1496 else if (!strncmp ("freepage", p, 8)) {
1497 void *ptr;
1498
1499 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1500 if (ret != 1) {
1501 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1502 }
1503 freepage (ptr);
1504 }
1505 else if (!strncmp ("freetile", p, 8)) {
1506 void *ptr;
1507
1508 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1509 if (ret != 1) {
1510 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1511 }
1512 freetile (ptr);
1513 }
1514 else if (!strncmp ("search", p, 6)) {
1515 int icase, pageno, y, ret, len2, forward;
1516 char *pattern;
1517 regex_t re;
1518
1519 ret = sscanf (p + 6, " %d %d %d %d,%n",
1520 &icase, &pageno, &y, &forward, &len2);
1521 if (ret != 4) {
1522 errx (1, "malformed search `%s' ret=%d", p, ret);
1523 }
1524
1525 pattern = p + 6 + len2;
1526 ret = regcomp (&re, pattern,
1527 REG_EXTENDED | (icase ? REG_ICASE : 0));
1528 if (ret) {
1529 char errbuf[80];
1530 size_t size;
1531
1532 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1533 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1534 }
1535 else {
1536 search (&re, pageno, y, forward);
1537 regfree (&re);
1538 }
1539 }
1540 else if (!strncmp ("geometry", p, 8)) {
1541 int w, h;
1542
1543 printd ("clear");
1544 ret = sscanf (p + 8, " %d %d", &w, &h);
1545 if (ret != 2) {
1546 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1547 }
1548
1549 lock ("geometry");
1550 state.h = h;
1551 if (w != state.w) {
1552 int i;
1553 state.w = w;
1554 for (i = 0; i < state.texcount; ++i) {
1555 state.texowners[i].slice = NULL;
1556 }
1557 }
1558 layout ();
1559 process_outline ();
1560 state.gen++;
1561 unlock ("geometry");
1562 printd ("continue %d", state.pagecount);
1563 }
1564 else if (!strncmp ("reqlayout", p, 9)) {
1565 int rotate, proportional;
1566
1567 printd ("clear");
1568 ret = sscanf (p + 9, " %d %d", &rotate, &proportional);
1569 if (ret != 2) {
1570 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1571 }
1572 lock ("reqlayout");
1573 if (state.rotate != rotate || state.proportional != proportional) {
1574 state.gen += 1;
1575 }
1576 state.rotate = rotate;
1577 state.proportional = proportional;
1578 layout ();
1579 process_outline ();
1580 state.gen++;
1581 unlock ("reqlayout");
1582 printd ("continue %d", state.pagecount);
1583 }
1584 else if (!strncmp ("page", p, 4)) {
1585 double a, b;
1586 struct page *page;
1587 int pageno, pindex, ret;
1588
1589 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1590 if (ret != 2) {
1591 errx (1, "bad render line `%.*s' ret=%d", len, p, ret);
1592 }
1593
1594 lock ("page");
1595 a = now ();
1596 page = loadpage (pageno, pindex);
1597 b = now ();
1598 unlock ("page");
1599
1600 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
1601 }
1602 else if (!strncmp ("tile", p, 4)) {
1603 int x, y, w, h, ret;
1604 struct page *page;
1605 struct tile *tile;
1606 double a, b;
1607
1608 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d",
1609 FMT_ptr_cast (&page), &x, &y, &w, &h);
1610 if (ret != 5) {
1611 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
1612 }
1613
1614 lock ("tile");
1615 a = now ();
1616 tile = rendertile (page, x, y, w, h);
1617 b = now ();
1618 unlock ("tile");
1619
1620 printd ("tile %d %d %" FMT_ptr " %u %f",
1621 x, y,
1622 FMT_ptr_cast2 (tile),
1623 tile->w * tile->h * tile->pixmap->n,
1624 b - a);
1625 }
1626 else if (!strncmp ("settrim", p, 7)) {
1627 int trimmargins;
1628 fz_bbox fuzz;
1629
1630 ret = sscanf (p + 7, " %d %d %d %d %d", &trimmargins,
1631 &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
1632 if (ret != 5) {
1633 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
1634 }
1635 printd ("clear");
1636 lock ("settrim");
1637 state.trimmargins = trimmargins;
1638 state.needoutline = 1;
1639 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
1640 state.trimanew = 1;
1641 state.trimfuzz = fuzz;
1642 }
1643 state.pagedimcount = 0;
1644 free (state.pagedims);
1645 state.pagedims = NULL;
1646 initpdims ();
1647 layout ();
1648 process_outline ();
1649 unlock ("settrim");
1650 printd ("continue %d", state.pagecount);
1651 }
1652 else if (!strncmp ("sliceh", p, 6)) {
1653 int h;
1654
1655 ret = sscanf (p + 6, " %d", &h);
1656 if (ret != 1) {
1657 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
1658 }
1659 if (h != state.sliceheight) {
1660 int i;
1661
1662 state.sliceheight = h;
1663 for (i = 0; i < state.texcount; ++i) {
1664 state.texowners[i].w = -1;
1665 state.texowners[i].h = -1;
1666 state.texowners[i].slice = NULL;
1667 }
1668 }
1669 }
1670 else if (!strncmp ("interrupt", p, 9)) {
1671 printd ("vmsg interrupted");
1672 }
1673 else {
1674 errx (1, "unknown command %.*s", len, p);
1675 }
1676 }
1677 return 0;
1678 }
1679
1680 CAMLprim value ml_realloctexts (value texcount_v)
1681 {
1682 CAMLparam1 (texcount_v);
1683 int ok;
1684
1685 if (trylock ("ml_realloctexts")) {
1686 ok = 0;
1687 goto done;
1688 }
1689 realloctexts (Int_val (texcount_v));
1690 ok = 1;
1691 unlock ("ml_realloctexts");
1692
1693 done:
1694 CAMLreturn (Val_bool (ok));
1695 }
1696
1697 static void showsel (struct page *page, int ox, int oy)
1698 {
1699 int seen = 0;
1700 fz_bbox bbox;
1701 fz_text_line *line;
1702 fz_text_span *span;
1703 fz_text_block *block;
1704 struct mark first, last;
1705
1706 first = page->fmark;
1707 last = page->lmark;
1708
1709 if (!first.span || !last.span) return;
1710
1711 glEnable (GL_BLEND);
1712 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
1713 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
1714
1715 ox += state.pagedims[page->pdimno].bounds.x0;
1716 oy += state.pagedims[page->pdimno].bounds.y0;
1717 for (block = page->text->blocks;
1718 block < page->text->blocks + page->text->len;
1719 ++block) {
1720 for (line = block->lines;
1721 line < block->lines + block->len;
1722 ++line) {
1723 for (span = line->spans;
1724 span < line->spans + line->len;
1725 ++span) {
1726 int i, j, k;
1727
1728 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
1729
1730 j = 0;
1731 k = span->len - 1;
1732
1733 if (span == page->fmark.span && span == page->lmark.span) {
1734 seen = 1;
1735 j = MIN (first.i, last.i);
1736 k = MAX (first.i, last.i);
1737 }
1738 else if (span == first.span) {
1739 seen = 1;
1740 j = first.i;
1741 }
1742 else if (span == last.span) {
1743 seen = 1;
1744 k = last.i;
1745 }
1746
1747 if (seen) {
1748 for (i = j; i <= k; ++i) {
1749 fz_bbox b = fz_round_rect (span->text[i].bbox);
1750 bbox = fz_union_bbox (bbox, b);
1751 }
1752 lprintf ("%d %d %d %d oy=%d ox=%d\n",
1753 bbox.x0,
1754 bbox.y0,
1755 bbox.x1,
1756 bbox.y1,
1757 oy, ox);
1758
1759 glRecti (bbox.x0 + ox, bbox.y0 + oy,
1760 bbox.x1 + ox, bbox.y1 + oy);
1761 if (span == last.span) {
1762 goto done;
1763 }
1764 }
1765 }
1766 }
1767 }
1768 done:
1769 glDisable (GL_BLEND);
1770 }
1771
1772 #include "glfont.c"
1773
1774 static void highlightlinks (struct page *page, int xoff, int yoff)
1775 {
1776 fz_matrix ctm;
1777 fz_link *link, *links;
1778
1779 switch (page->type) {
1780 case DPDF:
1781 links = page->u.pdfpage->links;
1782 break;
1783
1784 case DXPS:
1785 links = page->u.xpspage->links;
1786 break;
1787
1788 default:
1789 return;
1790 }
1791
1792 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
1793 glEnable (GL_LINE_STIPPLE);
1794 glLineStipple (0.5, 0xcccc);
1795
1796 xoff -= state.pagedims[page->pdimno].bounds.x0;
1797 yoff -= state.pagedims[page->pdimno].bounds.y0;
1798 ctm = fz_concat (pagectm (page), fz_translate (xoff, yoff));
1799
1800 glBegin (GL_QUADS);
1801 for (link = links; link; link = link->next) {
1802 fz_point p1, p2, p3, p4;
1803
1804 p1.x = link->rect.x0;
1805 p1.y = link->rect.y0;
1806
1807 p2.x = link->rect.x1;
1808 p2.y = link->rect.y0;
1809
1810 p3.x = link->rect.x1;
1811 p3.y = link->rect.y1;
1812
1813 p4.x = link->rect.x0;
1814 p4.y = link->rect.y1;
1815
1816 p1 = fz_transform_point (ctm, p1);
1817 p2 = fz_transform_point (ctm, p2);
1818 p3 = fz_transform_point (ctm, p3);
1819 p4 = fz_transform_point (ctm, p4);
1820
1821 switch (link->dest.kind) {
1822 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
1823 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
1824 default: glColor3ub (0, 0, 0); break;
1825 }
1826
1827 glVertex2f (p1.x, p1.y);
1828 glVertex2f (p2.x, p2.y);
1829 glVertex2f (p3.x, p3.y);
1830 glVertex2f (p4.x, p4.y);
1831 }
1832 glEnd ();
1833
1834 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
1835 glDisable (GL_LINE_STIPPLE);
1836 }
1837
1838 static int compareslinks (const void *l, const void *r)
1839 {
1840 struct slink const *ls = l;
1841 struct slink const *rs = r;
1842 if (ls->bbox.y0 == rs->bbox.y0) {
1843 return rs->bbox.x0 - rs->bbox.x0;
1844 }
1845 return ls->bbox.y0 - rs->bbox.y0;
1846 }
1847
1848 static void droptext (struct page *page)
1849 {
1850 if (page->text) {
1851 fz_free_text_page (state.ctx, page->text);
1852 page->fmark.i = -1;
1853 page->lmark.i = -1;
1854 page->fmark.span = NULL;
1855 page->lmark.span = NULL;
1856 page->text = NULL;
1857 }
1858 if (page->sheet) {
1859 fz_free_text_sheet (state.ctx, page->sheet);
1860 }
1861 }
1862
1863 static void dropslinks (struct page *page)
1864 {
1865 if (page->slinks) {
1866 free (page->slinks);
1867 page->slinks = NULL;
1868 page->slinkcount = 0;
1869 }
1870 }
1871
1872 static void ensureslinks (struct page *page)
1873 {
1874 fz_matrix ctm;
1875 int i, count = 0;
1876 size_t slinksize = sizeof (*page->slinks);
1877 fz_link *link, *links;
1878
1879 if (state.gen != page->sgen) {
1880 dropslinks (page);
1881 page->sgen = state.gen;
1882 }
1883 if (page->slinks) return;
1884
1885 switch (page->type) {
1886 case DPDF:
1887 links = page->u.pdfpage->links;
1888 ctm = fz_concat (trimctm (page->u.pdfpage, page->pdimno),
1889 state.pagedims[page->pdimno].ctm);
1890 break;
1891
1892 case DXPS:
1893 links = page->u.xpspage->links;
1894 ctm = state.pagedims[page->pdimno].ctm;
1895 break;
1896
1897 default:
1898 return;
1899 }
1900
1901 for (link = links; link; link = link->next) {
1902 count++;
1903 }
1904 if (count > 0) {
1905 page->slinkcount = count;
1906 page->slinks = calloc (count, slinksize);
1907 if (!page->slinks) {
1908 err (1, "realloc slinks %d", count);
1909 }
1910
1911 for (i = 0, link = links; link; ++i, link = link->next) {
1912 page->slinks[i].link = link;
1913 page->slinks[i].bbox =
1914 fz_round_rect (fz_transform_rect (ctm, link->rect));
1915 }
1916 qsort (page->slinks, count, slinksize, compareslinks);
1917 }
1918 }
1919
1920 /* slightly tweaked fmt_ulong by D.J. Bernstein */
1921 static void fmt_linkn (char *s, unsigned int u)
1922 {
1923 unsigned int len; unsigned int q;
1924 int zma = 'z' - 'a' + 1;
1925 len = 1; q = u;
1926 while (q > zma - 1) { ++len; q /= zma; }
1927 if (s) {
1928 s += len;
1929 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
1930 /* handles u == 0 */
1931 }
1932 s[len] = 0;
1933 }
1934
1935 static void highlightslinks (struct page *page, int xoff, int yoff,
1936 int noff, char *targ, int tlen, int hfsize)
1937 {
1938 int i;
1939 char buf[40];
1940 struct slink *slink;
1941 double x0, y0, x1, y1, w;
1942
1943 ensureslinks (page);
1944 glColor3ub (0xc3, 0xb0, 0x91);
1945 for (i = 0; i < page->slinkcount; ++i) {
1946 fmt_linkn (buf, i + noff);
1947 if (!tlen || !strncmp (targ, buf, tlen)) {
1948 slink = &page->slinks[i];
1949
1950 x0 = slink->bbox.x0 + xoff - 5;
1951 y1 = slink->bbox.y0 + yoff - 5;
1952 y0 = y1 + 10 + hfsize;
1953 w = measure_string (state.face, hfsize, buf);
1954 x1 = x0 + w + 10;
1955 glRectd (x0, y0, x1, y1);
1956 }
1957 }
1958
1959 glEnable (GL_BLEND);
1960 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1961 glEnable (GL_TEXTURE_2D);
1962 glColor3ub (0, 0, 0);
1963 for (i = 0; i < page->slinkcount; ++i) {
1964 fmt_linkn (buf, i + noff);
1965 if (!tlen || !strncmp (targ, buf, tlen)) {
1966 slink = &page->slinks[i];
1967
1968 x0 = slink->bbox.x0 + xoff;
1969 y0 = slink->bbox.y0 + yoff + hfsize;
1970 draw_string (state.face, hfsize, x0, y0, buf);
1971 }
1972 }
1973 glDisable (GL_TEXTURE_2D);
1974 glDisable (GL_BLEND);
1975 }
1976
1977
1978 static void uploadslice (struct tile *tile, struct slice *slice)
1979 {
1980 int offset;
1981 struct slice *slice1;
1982
1983 offset = 0;
1984 for (slice1 = tile->slices; slice != slice1; slice1++) {
1985 offset += slice1->h * tile->w * tile->pixmap->n;
1986 }
1987 if (slice->texindex != -1 && slice->texindex < state.texcount
1988 && state.texowners[slice->texindex].slice == slice) {
1989 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
1990 }
1991 else {
1992 int subimage = 0;
1993 int texindex = state.texindex++ % state.texcount;
1994
1995 if (state.texowners[texindex].w == tile->w) {
1996 if (state.texowners[texindex].h >= slice->h) {
1997 subimage = 1;
1998 }
1999 else {
2000 state.texowners[texindex].h = slice->h;
2001 }
2002 }
2003 else {
2004 state.texowners[texindex].h = slice->h;
2005 }
2006
2007 state.texowners[texindex].w = tile->w;
2008 state.texowners[texindex].slice = slice;
2009 slice->texindex = texindex;
2010
2011 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2012 if (subimage) {
2013 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2014 0,
2015 0,
2016 0,
2017 tile->w,
2018 slice->h,
2019 state.texform,
2020 state.texty,
2021 tile->pixmap->samples+offset
2022 );
2023 }
2024 else {
2025 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2026 0,
2027 state.texiform,
2028 tile->w,
2029 slice->h,
2030 0,
2031 state.texform,
2032 state.texty,
2033 tile->pixmap->samples+offset
2034 );
2035 }
2036 }
2037 }
2038
2039 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2040 {
2041 CAMLparam2 (args_v, ptr_v);
2042 int dispx = Int_val (Field (args_v, 0));
2043 int dispy = Int_val (Field (args_v, 1));
2044 int dispw = Int_val (Field (args_v, 2));
2045 int disph = Int_val (Field (args_v, 3));
2046 int tilex = Int_val (Field (args_v, 4));
2047 int tiley = Int_val (Field (args_v, 5));
2048 char *s = String_val (ptr_v);
2049 struct tile *tile = parse_pointer ("ml_drawtile", s);
2050
2051 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2052 {
2053 int slicey, firstslice;
2054 struct slice *slice;
2055
2056 firstslice = tiley / tile->sliceheight;
2057 slice = &tile->slices[firstslice];
2058 slicey = tiley % tile->sliceheight;
2059
2060 while (disph > 0) {
2061 int dh;
2062
2063 dh = slice->h - slicey;
2064 dh = MIN (disph, dh);
2065 uploadslice (tile, slice);
2066
2067 glBegin (GL_QUADS);
2068 {
2069 glTexCoord2i (tilex, slicey);
2070 glVertex2i (dispx, dispy);
2071
2072 glTexCoord2i (tilex+dispw, slicey);
2073 glVertex2i (dispx+dispw, dispy);
2074
2075 glTexCoord2i (tilex+dispw, slicey+dh);
2076 glVertex2i (dispx+dispw, dispy+dh);
2077
2078 glTexCoord2i (tilex, slicey+dh);
2079 glVertex2i (dispx, dispy+dh);
2080 }
2081 glEnd ();
2082
2083 dispy += dh;
2084 disph -= dh;
2085 slice++;
2086 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2087 slicey = 0;
2088 }
2089 }
2090 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2091 CAMLreturn (Val_unit);
2092 }
2093
2094 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2095 value xoff_v, value yoff_v,
2096 value li_v)
2097 {
2098 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2099 int xoff = Int_val (xoff_v);
2100 int yoff = Int_val (yoff_v);
2101 int noff = Int_val (Field (li_v, 0));
2102 char *targ = String_val (Field (li_v, 1));
2103 int tlen = caml_string_length (Field (li_v, 1));
2104 int hfsize = Int_val (Field (li_v, 2));
2105 char *s = String_val (ptr_v);
2106 int hlmask = Int_val (hlinks_v);
2107 struct page *page = parse_pointer ("ml_postprocess", s);
2108
2109 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2110 if (trylock ("ml_postprocess")) {
2111 noff = 0;
2112 goto done;
2113 }
2114 if (hlmask & 2) {
2115 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2116 noff = page->slinkcount;
2117 }
2118 showsel (page, xoff, yoff);
2119 unlock ("ml_postprocess");
2120
2121 done:
2122 CAMLreturn (Val_int (noff));
2123 }
2124
2125 static fz_link *getlink (struct page *page, int x, int y)
2126 {
2127 fz_point p;
2128 fz_matrix ctm;
2129 fz_link *link, *links;
2130
2131 switch (page->type) {
2132 case DPDF:
2133 ctm = trimctm (page->u.pdfpage, page->pdimno);
2134 links = page->u.pdfpage->links;
2135 break;
2136
2137 case DXPS:
2138 ctm = fz_identity;
2139 links = page->u.xpspage->links;
2140 break;
2141
2142 default:
2143 return NULL;
2144 }
2145 p.x = x;
2146 p.y = y;
2147
2148 ctm = fz_concat (ctm, state.pagedims[page->pdimno].ctm);
2149 ctm = fz_invert_matrix (ctm);
2150 p = fz_transform_point (ctm, p);
2151
2152 for (link = links; link; link = link->next) {
2153 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2154 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2155 return link;
2156 }
2157 }
2158 }
2159 return NULL;
2160 }
2161
2162 static void ensuretext (struct page *page)
2163 {
2164 if (state.gen != page->tgen) {
2165 droptext (page);
2166 page->tgen = state.gen;
2167 }
2168 if (!page->text) {
2169 fz_device *tdev;
2170
2171 page->text = fz_new_text_page (state.ctx, fz_infinite_rect);
2172 page->sheet = fz_new_text_sheet (state.ctx);
2173 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2174 fz_run_display_list (page->dlist,
2175 tdev,
2176 pagectm (page),
2177 fz_infinite_bbox, NULL);
2178 qsort (page->text->blocks, page->text->len,
2179 sizeof (*page->text->blocks), compareblocks);
2180 fz_free_device (tdev);
2181 }
2182 }
2183
2184 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2185 {
2186 CAMLparam2 (start_page_v, dir_v);
2187 CAMLlocal1 (ret_v);
2188 int i, dir = Int_val (dir_v);
2189 int start_page = Int_val (start_page_v);
2190 int end_page = dir > 0 ? state.pagecount : -1;
2191
2192 ret_v = Val_int (0);
2193 if (!(state.type == DPDF || state.type == DXPS)) {
2194 goto done;
2195 }
2196
2197 lock ("ml_findpage_with_links");
2198 for (i = start_page + dir; i != end_page; i += dir) {
2199 int found;
2200
2201 switch (state.type) {
2202 case DPDF:
2203 {
2204 pdf_page *page = NULL;
2205
2206 fz_try (state.ctx) {
2207 page = pdf_load_page (state.u.pdf, i);
2208 found = !!page->links;
2209 }
2210 fz_catch (state.ctx) {
2211 found = 0;
2212 }
2213 if (page) {
2214 freepdfpage (page);
2215 }
2216 }
2217 break;
2218 case DXPS:
2219 {
2220 xps_page *page = xps_load_page (state.u.xps, i);
2221 found = !!page->links;
2222 freexpspage (page);
2223 }
2224 break;
2225
2226 default:
2227 ARSERT ("invalid document type");
2228 }
2229
2230 if (found) {
2231 ret_v = caml_alloc_small (1, 1);
2232 Field (ret_v, 0) = Val_int (i);
2233 goto unlock;
2234 }
2235 }
2236 unlock:
2237 unlock ("ml_findpage_with_links");
2238
2239 done:
2240 CAMLreturn (ret_v);
2241 }
2242
2243 enum { dir_first, dir_last};
2244 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2245
2246 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2247 {
2248 CAMLparam2 (ptr_v, dir_v);
2249 CAMLlocal2 (ret_v, pos_v);
2250 struct page *page;
2251 int dirtag, i, slinkindex;
2252 struct slink *found = NULL ,*slink;
2253 char *s = String_val (ptr_v);
2254
2255 page = parse_pointer ("ml_findlink", s);
2256 ret_v = Val_int (0);
2257 if (trylock ("ml_findlink")) {
2258 goto done;
2259 }
2260
2261 ensureslinks (page);
2262
2263 if (Is_block (dir_v)) {
2264 dirtag = Tag_val (dir_v);
2265 switch (dirtag) {
2266 case dir_first_visible:
2267 {
2268 int x0, y0, dir, first_index, last_index;
2269
2270 pos_v = Field (dir_v, 0);
2271 x0 = Int_val (Field (pos_v, 0));
2272 y0 = Int_val (Field (pos_v, 1));
2273 dir = Int_val (Field (pos_v, 2));
2274
2275 if (dir >= 0) {
2276 dir = 1;
2277 first_index = 0;
2278 last_index = page->slinkcount;
2279 }
2280 else {
2281 first_index = page->slinkcount - 1;
2282 last_index = -1;
2283 }
2284
2285 for (i = first_index; i != last_index; i += dir) {
2286 slink = &page->slinks[i];
2287 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2288 found = slink;
2289 break;
2290 }
2291 }
2292 }
2293 break;
2294
2295 case dir_left:
2296 slinkindex = Int_val (Field (dir_v, 0));
2297 found = &page->slinks[slinkindex];
2298 for (i = slinkindex - 1; i >= 0; --i) {
2299 slink = &page->slinks[i];
2300 if (slink->bbox.x0 < found->bbox.x0) {
2301 found = slink;
2302 break;
2303 }
2304 }
2305 break;
2306
2307 case dir_right:
2308 slinkindex = Int_val (Field (dir_v, 0));
2309 found = &page->slinks[slinkindex];
2310 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2311 slink = &page->slinks[i];
2312 if (slink->bbox.x0 > found->bbox.x0) {
2313 found = slink;
2314 break;
2315 }
2316 }
2317 break;
2318
2319 case dir_down:
2320 slinkindex = Int_val (Field (dir_v, 0));
2321 found = &page->slinks[slinkindex];
2322 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2323 slink = &page->slinks[i];
2324 if (slink->bbox.y0 >= found->bbox.y0) {
2325 found = slink;
2326 break;
2327 }
2328 }
2329 break;
2330
2331 case dir_up:
2332 slinkindex = Int_val (Field (dir_v, 0));
2333 found = &page->slinks[slinkindex];
2334 for (i = slinkindex - 1; i >= 0; --i) {
2335 slink = &page->slinks[i];
2336 if (slink->bbox.y0 <= found->bbox.y0) {
2337 found = slink;
2338 break;
2339 }
2340 }
2341 break;
2342 }
2343 }
2344 else {
2345 dirtag = Int_val (dir_v);
2346 switch (dirtag) {
2347 case dir_first:
2348 found = page->slinks;
2349 break;
2350
2351 case dir_last:
2352 if (page->slinks) {
2353 found = page->slinks + (page->slinkcount - 1);
2354 }
2355 break;
2356 }
2357 }
2358 if (found) {
2359 ret_v = caml_alloc_small (2, 1);
2360 Field (ret_v, 0) = Val_int (found - page->slinks);
2361 }
2362
2363 unlock ("ml_findlink");
2364 done:
2365 CAMLreturn (ret_v);
2366 }
2367
2368 enum { uuri, ugoto, utext, uunexpected, ulaunch, unamed, uremote };
2369
2370 #define LINKTOVAL \
2371 { \
2372 int pageno; \
2373 \
2374 switch (link->dest.kind) { \
2375 case FZ_LINK_GOTO: \
2376 { \
2377 fz_point p; \
2378 \
2379 pageno = link->dest.ld.gotor.page; \
2380 p.x = 0; \
2381 p.y = 0; \
2382 \
2383 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2384 p.y = link->dest.ld.gotor.lt.y; \
2385 p = fz_transform_point (pdim->lctm, p); \
2386 } \
2387 tup_v = caml_alloc_tuple (2); \
2388 ret_v = caml_alloc_small (1, ugoto); \
2389 Field (tup_v, 0) = Val_int (pageno); \
2390 Field (tup_v, 1) = Val_int (p.y); \
2391 Field (ret_v, 0) = tup_v; \
2392 } \
2393 break; \
2394 \
2395 case FZ_LINK_URI: \
2396 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2397 ret_v = caml_alloc_small (1, uuri); \
2398 Field (ret_v, 0) = str_v; \
2399 break; \
2400 \
2401 case FZ_LINK_LAUNCH: \
2402 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2403 ret_v = caml_alloc_small (1, ulaunch); \
2404 Field (ret_v, 0) = str_v; \
2405 break; \
2406 \
2407 case FZ_LINK_NAMED: \
2408 str_v = caml_copy_string (link->dest.ld.named.named); \
2409 ret_v = caml_alloc_small (1, unamed); \
2410 Field (ret_v, 0) = str_v; \
2411 break; \
2412 \
2413 case FZ_LINK_GOTOR: \
2414 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2415 pageno = link->dest.ld.gotor.page; \
2416 tup_v = caml_alloc_tuple (2); \
2417 ret_v = caml_alloc_small (1, uremote); \
2418 Field (tup_v, 0) = str_v; \
2419 Field (tup_v, 1) = Val_int (pageno); \
2420 Field (ret_v, 0) = tup_v; \
2421 break; \
2422 \
2423 default: \
2424 { \
2425 char buf[80]; \
2426 \
2427 snprintf (buf, sizeof (buf), \
2428 "unhandled link kind %d", link->dest.kind); \
2429 str_v = caml_copy_string (buf); \
2430 ret_v = caml_alloc_small (1, uunexpected); \
2431 Field (ret_v, 0) = str_v; \
2432 } \
2433 break; \
2434 } \
2435 }
2436
2437 CAMLprim value ml_getlink (value ptr_v, value n_v)
2438 {
2439 CAMLparam2 (ptr_v, n_v);
2440 CAMLlocal3 (ret_v, tup_v, str_v);
2441 fz_link *link;
2442 struct page *page;
2443 struct pagedim *pdim;
2444 char *s = String_val (ptr_v);
2445
2446 ret_v = Val_int (0);
2447 if (trylock ("ml_getlink")) {
2448 goto done;
2449 }
2450
2451 page = parse_pointer ("ml_getlink", s);
2452 ensureslinks (page);
2453 pdim = &state.pagedims[page->pdimno];
2454 link = page->slinks[Int_val (n_v)].link;
2455 LINKTOVAL;
2456
2457 unlock ("ml_getlink");
2458 done:
2459 CAMLreturn (ret_v);
2460 }
2461
2462 CAMLprim value ml_getlinkcount (value ptr_v)
2463 {
2464 CAMLparam1 (ptr_v);
2465 struct page *page;
2466 char *s = String_val (ptr_v);
2467
2468 page = parse_pointer ("ml_getlinkcount", s);
2469 CAMLreturn (Val_int (page->slinkcount));
2470 }
2471
2472 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
2473 {
2474 CAMLparam2 (ptr_v, n_v);
2475 CAMLlocal1 (ret_v);
2476 struct page *page;
2477 struct slink *slink;
2478 char *s = String_val (ptr_v);
2479
2480 page = parse_pointer ("ml_getlinkrect", s);
2481 ret_v = caml_alloc_tuple (4);
2482 if (trylock ("ml_getlinkrect")) {
2483 Field (ret_v, 0) = Val_int (0);
2484 Field (ret_v, 1) = Val_int (0);
2485 Field (ret_v, 2) = Val_int (0);
2486 Field (ret_v, 3) = Val_int (0);
2487 goto done;
2488 }
2489 ensureslinks (page);
2490
2491 slink = &page->slinks[Int_val (n_v)];
2492 Field (ret_v, 0) = Val_int (slink->bbox.x0);
2493 Field (ret_v, 1) = Val_int (slink->bbox.y0);
2494 Field (ret_v, 2) = Val_int (slink->bbox.x1);
2495 Field (ret_v, 3) = Val_int (slink->bbox.y1);
2496 unlock ("ml_getlinkrect");
2497
2498 done:
2499 CAMLreturn (ret_v);
2500 }
2501
2502 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
2503 {
2504 CAMLparam3 (ptr_v, x_v, y_v);
2505 CAMLlocal3 (ret_v, tup_v, str_v);
2506 fz_link *link;
2507 struct page *page;
2508 char *s = String_val (ptr_v);
2509 int x = Int_val (x_v), y = Int_val (y_v);
2510 struct pagedim *pdim;
2511
2512 ret_v = Val_int (0);
2513 if (trylock ("ml_whatsunder")) {
2514 goto done;
2515 }
2516
2517 page = parse_pointer ("ml_whatsunder", s);
2518 pdim = &state.pagedims[page->pdimno];
2519 x += pdim->bounds.x0;
2520 y += pdim->bounds.y0;
2521 link = getlink (page, x, y);
2522 if (link) {
2523 LINKTOVAL;
2524 }
2525 else {
2526 fz_rect *b;
2527 fz_text_block *block;
2528
2529 ensuretext (page);
2530 for (block = page->text->blocks;
2531 block < page->text->blocks + page->text->len;
2532 ++block) {
2533 fz_text_line *line;
2534
2535 b = &block->bbox;
2536 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2537 continue;
2538
2539 for (line = block->lines;
2540 line < block->lines + block->len;
2541 ++line) {
2542 fz_text_span *span;
2543
2544 b = &line->bbox;
2545 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2546 continue;
2547
2548 for (span = line->spans;
2549 span < line->spans + line->len;
2550 ++span) {
2551 fz_text_char *ch;
2552
2553 b = &span->bbox;
2554 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
2555 continue;
2556
2557 for (ch = span->text; ch < span->text + span->len; ++ch) {
2558 b = &ch->bbox;
2559
2560 if (x >= b->x0 && x <= b->x1
2561 && y >= b->y0 && y <= b->y1) {
2562 const char *n2 =
2563 span->style->font && span->style->font->name
2564 ? span->style->font->name
2565 : "Span has no font name"
2566 ;
2567 FT_FaceRec *face = span->style->font->ft_face;
2568 if (face && face->family_name) {
2569 char *s;
2570 char *n1 = face->family_name;
2571 size_t l1 = strlen (n1);
2572 size_t l2 = strlen (n2);
2573
2574 if (l1 != l2 || memcmp (n1, n2, l1)) {
2575 s = malloc (l1 + l2 + 2);
2576 if (s) {
2577 memcpy (s, n2, l2);
2578 s[l2] = '=';
2579 memcpy (s + l2 + 1, n1, l1 + 1);
2580 str_v = caml_copy_string (s);
2581 free (s);
2582 }
2583 }
2584 }
2585 if (str_v == 0) {
2586 str_v = caml_copy_string (n2);
2587 }
2588 ret_v = caml_alloc_small (1, utext);
2589 Field (ret_v, 0) = str_v;
2590 goto unlock;
2591 }
2592 }
2593 }
2594 }
2595 }
2596 }
2597 unlock:
2598 unlock ("ml_whatsunder");
2599
2600 done:
2601 CAMLreturn (ret_v);
2602 }
2603
2604 CAMLprim value ml_seltext (value ptr_v, value rect_v)
2605 {
2606 CAMLparam2 (ptr_v, rect_v);
2607 fz_rect *b;
2608 struct page *page;
2609 struct pagedim *pdim;
2610 int i, x0, x1, y0, y1;
2611 char *s = String_val (ptr_v);
2612 int fi = 0, li = 0;
2613 fz_text_block *block;
2614 fz_text_span *span, *fspan, *lspan;
2615 fz_text_line *line, *fline = NULL, *lline = NULL;
2616
2617 if (trylock ("ml_seltext")) {
2618 goto done;
2619 }
2620
2621 page = parse_pointer ("ml_seltext", s);
2622 ensuretext (page);
2623
2624 pdim = &state.pagedims[page->pdimno];
2625 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;;
2626 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
2627 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
2628 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
2629
2630 if (0) {
2631 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2632 glColor3ub (128, 128, 128);
2633 glRecti (x0, y0, x1, y1);
2634 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2635 }
2636
2637 fspan = lspan = NULL;
2638
2639 for (block = page->text->blocks;
2640 block < page->text->blocks + page->text->len;
2641 ++block) {
2642 for (line = block->lines;
2643 line < block->lines + block->len;
2644 ++line) {
2645 for (span = line->spans;
2646 span < line->spans + line->len;
2647 ++span) {
2648 for (i = 0; i < span->len; ++i) {
2649 b = &span->text[i].bbox;
2650 int selected = 0;
2651
2652 if (x0 >= b->x0 && x0 <= b->x1
2653 && y0 >= b->y0 && y0 <= b->y1) {
2654 fspan = span;
2655 fline = line;
2656 fi = i;
2657 selected = 1;
2658 }
2659 if (x1 >= b->x0 && x1 <= b->x1
2660 && y1 >= b->y0 && y1 <= b->y1) {
2661 lspan = span;
2662 lline = line;
2663 li = i;
2664 selected = 1;
2665 }
2666 if (0 && selected) {
2667 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2668 glColor3ub (128, 128, 128);
2669 glRecti (b->x0, b->y0, b->x1, b->y1);
2670 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2671 }
2672 }
2673 }
2674 }
2675 }
2676 if (y1 < y0 || x1 < x0) {
2677 int swap = 0;
2678
2679 if (fspan == lspan) {
2680 swap = 1;
2681 }
2682 else {
2683 if (y1 < y0) {
2684 if (fline != lline) {
2685 swap = 1;
2686 }
2687 }
2688 }
2689
2690 if (swap) {
2691 i = fi;
2692 span = fspan;
2693
2694 fi = li;
2695 fspan = lspan;
2696
2697 li = i;
2698 lspan = span;
2699 }
2700 }
2701
2702 page->fmark.i = fi;
2703 page->fmark.span = fspan;
2704
2705 page->lmark.i = li;
2706 page->lmark.span = lspan;
2707
2708 unlock ("ml_seltext");
2709
2710 done:
2711 CAMLreturn (Val_unit);
2712 }
2713
2714 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
2715 {
2716 char buf[4];
2717 int i, len, ret;
2718
2719 for (i = a; i <= b; ++i) {
2720 len = fz_runetochar (buf, span->text[i].c);
2721 ret = fwrite (buf, len, 1, f);
2722
2723 if (ret != 1) {
2724 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
2725 len, ret, strerror (errno));
2726 return -1;
2727 }
2728 }
2729 return 0;
2730 }
2731
2732 #ifdef __CYGWIN__
2733 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
2734 {
2735 caml_failwith ("ml_popen not implemented under Cygwin");
2736 }
2737 #else
2738 CAMLprim value ml_popen (value command_v, value fds_v)
2739 {
2740 CAMLparam2 (command_v, fds_v);
2741 CAMLlocal2 (l_v, tup_v);
2742 int ret;
2743 char *msg = NULL;
2744 value earg_v = Nothing;
2745 posix_spawnattr_t attr;
2746 posix_spawn_file_actions_t fa;
2747 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
2748
2749 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
2750 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
2751 }
2752
2753 if ((ret = posix_spawnattr_init (&attr)) != 0) {
2754 msg = "posix_spawnattr_init";
2755 goto fail1;
2756 }
2757
2758 #ifdef POSIX_SPAWN_USEVFORK
2759 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
2760 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
2761 goto fail;
2762 }
2763 #endif
2764
2765 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
2766 int fd1, fd2;
2767
2768 tup_v = Field (l_v, 0);
2769 fd1 = Int_val (Field (tup_v, 0));
2770 fd2 = Int_val (Field (tup_v, 1));
2771 if (fd2 < 0) {
2772 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
2773 msg = "posix_spawn_file_actions_addclose";
2774 earg_v = tup_v;
2775 goto fail;
2776 }
2777 }
2778 else {
2779 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
2780 msg = "posix_spawn_file_actions_adddup2";
2781 earg_v = tup_v;
2782 goto fail;
2783 }
2784 }
2785 }
2786
2787 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
2788 msg = "posix_spawn";
2789 goto fail;
2790 }
2791
2792 fail:
2793 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
2794 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
2795 }
2796
2797 fail1:
2798 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
2799 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
2800 strerror (ret));
2801 }
2802
2803 if (msg)
2804 unix_error (ret, msg, earg_v);
2805
2806 CAMLreturn (Val_unit);
2807 }
2808 #endif
2809
2810 CAMLprim value ml_copysel (value fd_v, value ptr_v)
2811 {
2812 CAMLparam1 (ptr_v);
2813 FILE *f;
2814 int seen = 0;
2815 struct page *page;
2816 fz_text_line *line;
2817 fz_text_span *span;
2818 fz_text_block *block;
2819 int fd = Int_val (fd_v);
2820 char *s = String_val (ptr_v);
2821
2822 if (trylock ("ml_copysel")) {
2823 goto done;
2824 }
2825
2826 page = parse_pointer ("ml_sopysel", s);
2827
2828 if (!page->fmark.span || !page->lmark.span) {
2829 fprintf (stderr, "nothing to copy\n");
2830 goto unlock;
2831 }
2832
2833 f = fdopen (fd, "w");
2834 if (!f) {
2835 fprintf (stderr, "failed to fopen sel pipe: %s\n",
2836 strerror (errno));
2837 f = stdout;
2838 }
2839
2840 for (block = page->text->blocks;
2841 block < page->text->blocks + page->text->len;
2842 ++block) {
2843 for (line = block->lines;
2844 line < block->lines + block->len;
2845 ++line) {
2846 for (span = line->spans;
2847 span < line->spans + line->len;
2848 ++span) {
2849 int a, b;
2850
2851 seen |= span == page->fmark.span || span == page->lmark.span;
2852 a = span == page->fmark.span ? page->fmark.i : 0;
2853 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
2854
2855 if (seen) {
2856 if (pipespan (f, span, a, b)) {
2857 goto close;
2858 }
2859 if (span == line->spans + line->len - 1) {
2860 if (putc ('\n', f) == EOF) {
2861 fprintf (stderr,
2862 "failed break line on sel pipe: %s\n",
2863 strerror (errno));
2864 goto close;
2865 }
2866 }
2867 if (span == page->lmark.span) {
2868 goto endloop;
2869 }
2870 }
2871 }
2872 }
2873 }
2874 endloop:
2875 page->lmark.span = NULL;
2876 page->fmark.span = NULL;
2877
2878 close:
2879 if (f != stdout) {
2880 int ret = fclose (f);
2881 fd = -1;
2882 if (ret == -1) {
2883 if (errno != ECHILD) {
2884 fprintf (stderr, "failed to close sel pipe: %s\n",
2885 strerror (errno));
2886 }
2887 }
2888 }
2889 unlock:
2890 unlock ("ml_copysel");
2891
2892 done:
2893 if (fd >= 0) {
2894 if (close (fd)) {
2895 fprintf (stderr, "failed to close sel pipe: %s\n",
2896 strerror (errno));
2897 }
2898 }
2899 CAMLreturn (Val_unit);
2900 }
2901
2902 CAMLprim value ml_getpdimrect (value pagedimno_v)
2903 {
2904 CAMLparam1 (pagedimno_v);
2905 CAMLlocal1 (ret_v);
2906 int pagedimno = Int_val (pagedimno_v);
2907 fz_rect box;
2908
2909 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
2910 if (trylock ("ml_getpdimrect")) {
2911 box = fz_empty_rect;
2912 }
2913 else {
2914 box = state.pagedims[pagedimno].mediabox;
2915 unlock ("ml_getpdimrect");
2916 }
2917
2918 Store_double_field (ret_v, 0, box.x0);
2919 Store_double_field (ret_v, 1, box.x1);
2920 Store_double_field (ret_v, 2, box.y0);
2921 Store_double_field (ret_v, 3, box.y1);
2922
2923 CAMLreturn (ret_v);
2924 }
2925
2926 static double getmaxw (void)
2927 {
2928 int i;
2929 struct pagedim *p;
2930 double maxw = 0.0;
2931
2932 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2933 double x0, x1, w;
2934
2935 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
2936 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
2937
2938 w = x1 - x0;
2939 maxw = MAX (w, maxw);
2940 }
2941 return maxw;
2942 }
2943
2944 CAMLprim value ml_getmaxw (value unit_v)
2945 {
2946 CAMLparam1 (unit_v);
2947 CAMLlocal1 (ret_v);
2948 double maxw = 0.0;
2949
2950 if (trylock ("ml_getmaxw")) {
2951 goto done;
2952 }
2953 maxw = getmaxw ();
2954 unlock ("ml_getmaxw");
2955 done:
2956 ret_v = caml_copy_double (maxw);
2957 CAMLreturn (ret_v);
2958 }
2959
2960 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
2961 value dw_v, value cols_v)
2962 {
2963 CAMLparam3 (winw_v, winh_v, dw_v);
2964 CAMLlocal1 (ret_v);
2965 int i;
2966 double zoom = 1.0;
2967 double maxw = 0.0, maxh = 0.0;
2968 struct pagedim *p;
2969 double winw = Int_val (winw_v);
2970 double winh = Int_val (winh_v);
2971 double dw = Int_val (dw_v);
2972 double cols = Int_val (cols_v);
2973 double pw = 1.0, ph = 1.0, aspect;
2974
2975 if (trylock ("ml_zoom_for_height")) {
2976 goto done;
2977 }
2978
2979 if (state.proportional) {
2980 maxw = getmaxw () / cols;
2981 }
2982
2983 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2984 double x0, x1, y0, y1, w, h, scaledh, scale;
2985 fz_rect rect;
2986
2987 rect = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
2988 p->mediabox);
2989 x0 = MIN (rect.x0, rect.x1);
2990 x1 = MAX (rect.x0, rect.x1);
2991 y0 = MIN (rect.y0, rect.y1);
2992 y1 = MAX (rect.y0, rect.y1);
2993
2994 w = (x1 - x0) / cols;
2995 h = y1 - y0;
2996
2997 if (state.proportional) {
2998 scale = w / maxw;
2999 scaledh = h * scale;
3000 }
3001 else {
3002 scale = 1.0;
3003 scaledh = h;
3004 }
3005
3006 if (scaledh > maxh) {
3007 maxh = scaledh;
3008 ph = scaledh;
3009 pw = w * scale;
3010 }
3011 }
3012
3013 aspect = pw / ph;
3014 zoom = (winh * aspect + dw) / winw;
3015
3016 unlock ("ml_zoom_for_height");
3017 done:
3018 ret_v = caml_copy_double (zoom);
3019 CAMLreturn (ret_v);
3020 }
3021
3022 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3023 {
3024 CAMLparam4 (pt_v, x_v, y_v, string_v);
3025 CAMLlocal1 (ret_v);
3026 int pt = Int_val(pt_v);
3027 int x = Int_val (x_v);
3028 int y = Int_val (y_v);
3029 double w;
3030
3031 w = draw_string (state.face, pt, x, y, String_val (string_v));
3032 ret_v = caml_copy_double (w);
3033 CAMLreturn (ret_v);
3034 }
3035
3036 CAMLprim value ml_measure_string (value pt_v, value string_v)
3037 {
3038 CAMLparam2 (pt_v, string_v);
3039 CAMLlocal1 (ret_v);
3040 int pt = Int_val (pt_v);
3041 double w;
3042
3043 w = measure_string (state.face, pt, String_val (string_v));
3044 ret_v = caml_copy_double (w);
3045 CAMLreturn (ret_v);
3046 }
3047
3048 CAMLprim value ml_getpagebox (value opaque_v)
3049 {
3050 CAMLparam1 (opaque_v);
3051 CAMLlocal1 (ret_v);
3052 fz_bbox bbox;
3053 fz_device *dev;
3054 char *s = String_val (opaque_v);
3055 struct page *page = parse_pointer ("ml_getpagebox", s);
3056
3057 ret_v = caml_alloc_tuple (4);
3058 dev = fz_new_bbox_device (state.ctx, &bbox);
3059 dev->hints |= FZ_IGNORE_SHADE;
3060
3061 switch (page->type) {
3062 case DPDF:
3063 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, pagectm (page), NULL);
3064 break;
3065
3066 case DXPS:
3067 xps_run_page (state.u.xps, page->u.xpspage, dev, pagectm (page), NULL);
3068 break;
3069
3070 default:
3071 bbox = fz_infinite_bbox;
3072 break;
3073 }
3074
3075 fz_free_device (dev);
3076 Field (ret_v, 0) = Val_int (bbox.x0);
3077 Field (ret_v, 1) = Val_int (bbox.y0);
3078 Field (ret_v, 2) = Val_int (bbox.x1);
3079 Field (ret_v, 3) = Val_int (bbox.y1);
3080
3081 CAMLreturn (ret_v);
3082 }
3083
3084 CAMLprim value ml_setaalevel (value level_v)
3085 {
3086 CAMLparam1 (level_v);
3087
3088 state.aalevel = Int_val (level_v);
3089 CAMLreturn (Val_unit);
3090 }
3091
3092 #undef pixel
3093 #include <X11/Xlib.h>
3094 #include <GL/glx.h>
3095
3096 static struct {
3097 Display *dpy;
3098 GLXContext ctx;
3099 GLXDrawable drawable;
3100 } glx;
3101
3102 #include "keysym2ucs.c"
3103
3104 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3105 {
3106 CAMLparam1 (keysym_v);
3107 CAMLlocal1 (str_v);
3108 KeySym keysym = Int_val (keysym_v);
3109 Rune rune;
3110 int len;
3111 char buf[5];
3112
3113 rune = keysym2ucs (keysym);
3114 len = fz_runetochar (buf, rune);
3115 buf[len] = 0;
3116 str_v = caml_copy_string (buf);
3117 CAMLreturn (str_v);
3118 }
3119
3120 CAMLprim value ml_glx (value win_v)
3121 {
3122 CAMLparam1 (win_v);
3123 XVisualInfo *visual;
3124 int screen, wid = Int_val (win_v);
3125 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3126
3127 glx.dpy = XOpenDisplay (NULL);
3128 if (!glx.dpy) {
3129 caml_failwith ("XOpenDisplay failed");
3130 }
3131
3132 screen = DefaultScreen (glx.dpy);
3133 visual = glXChooseVisual (glx.dpy, screen, attributes);
3134 if (!visual) {
3135 XCloseDisplay (glx.dpy);
3136 glx.dpy = NULL;
3137 caml_failwith ("glXChooseVisual");
3138 }
3139
3140 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3141 XFree (visual);
3142 if (!glx.ctx) {
3143 XCloseDisplay (glx.dpy);
3144 glx.dpy = NULL;
3145 caml_failwith ("glXCreateContext");
3146 }
3147
3148 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3149 glXDestroyContext (glx.dpy, glx.ctx);
3150 XCloseDisplay (glx.dpy);
3151 glx.dpy = NULL;
3152 glx.ctx = NULL;
3153 caml_failwith ("glXMakeCurrent");
3154 }
3155 glx.drawable = wid;
3156
3157 CAMLreturn (Val_unit);
3158 }
3159
3160 CAMLprim value ml_swapb (value unit_v)
3161 {
3162 CAMLparam1 (unit_v);
3163 glXSwapBuffers (glx.dpy, glx.drawable);
3164 CAMLreturn (Val_unit);
3165 }
3166
3167 CAMLprim value ml_glxsync (value unit_v)
3168 {
3169 CAMLparam1 (unit_v);
3170 if (glx.dpy && glx.ctx) {
3171 glXWaitX ();
3172 glXWaitGL ();
3173 }
3174 CAMLreturn (Val_unit);
3175 }
3176
3177 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3178 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3179
3180 CAMLprim value ml_platform (value unit_v)
3181 {
3182 CAMLparam1 (unit_v);
3183 int platid = piunknown;
3184
3185 #if defined __linux__
3186 platid = pilinux;
3187 #elif defined __CYGWIN__
3188 platid = picygwin;
3189 #elif defined __DragonFly__
3190 platid = pidragonflybsd;
3191 #elif defined __FreeBSD__
3192 platid = pifreebsd;
3193 #elif defined __OpenBSD__
3194 platid = piopenbsd;
3195 #elif defined __NetBSD__
3196 platid = pinetbsd;
3197 #elif defined __sun__
3198 platid = pisun;
3199 #elif defined __APPLE__
3200 platid = piosx;
3201 #endif
3202 CAMLreturn (Val_int (platid));
3203 }
3204
3205 CAMLprim value ml_cloexec (value fd_v)
3206 {
3207 CAMLparam1 (fd_v);
3208 int fd = Int_val (fd_v);
3209
3210 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
3211 uerror ("fcntl", Nothing);
3212 }
3213 CAMLreturn (Val_unit);
3214 }
3215
3216 CAMLprim value ml_init (value pipe_v, value params_v)
3217 {
3218 CAMLparam2 (pipe_v, params_v);
3219 CAMLlocal2 (trim_v, fuzz_v);
3220 int ret;
3221 int texcount;
3222 char *fontpath;
3223 int colorspace;
3224 int mustoresize;
3225 struct sigaction sa;
3226
3227 state.cr = Int_val (Field (pipe_v, 0));
3228 state.cw = Int_val (Field (pipe_v, 1));
3229 state.rotate = Int_val (Field (params_v, 0));
3230 state.proportional = Bool_val (Field (params_v, 1));
3231 trim_v = Field (params_v, 2);
3232 texcount = Int_val (Field (params_v, 3));
3233 state.sliceheight = Int_val (Field (params_v, 4));
3234 mustoresize = Int_val (Field (params_v, 5));
3235 colorspace = Int_val (Field (params_v, 6));
3236 fontpath = String_val (Field (params_v, 7));
3237
3238 state.ctx = fz_new_context (NULL, NULL, mustoresize);
3239
3240 state.trimmargins = Bool_val (Field (trim_v, 0));
3241 fuzz_v = Field (trim_v, 1);
3242 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
3243 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
3244 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
3245 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
3246
3247 set_tex_params (colorspace);
3248
3249 if (*fontpath) {
3250 state.face = load_font (fontpath);
3251 }
3252 else {
3253 unsigned int len;
3254 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
3255
3256 state.face = load_builtin_font (base, len);
3257 }
3258 if (!state.face) _exit (1);
3259
3260 realloctexts (texcount);
3261
3262 #ifdef __CYGWIN__
3263 sa.sa_handler = SIG_IGN;
3264 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
3265 #else
3266 sa.sa_handler = SIG_DFL;
3267 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
3268 #endif
3269 if (sigemptyset (&sa.sa_mask)) {
3270 err (1, "sigemptyset");
3271 }
3272 if (sigaction (SIGCHLD, &sa, NULL)) {
3273 err (1, "sigaction");
3274 }
3275
3276 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
3277 if (ret) {
3278 errx (1, "pthread_create: %s", strerror (ret));
3279 }
3280
3281 CAMLreturn (Val_unit);
3282 }
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