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[llpp.git] / link.c
blobac8ec779f81c8205bd02ec488532e200e9c7bf70
1 /* lots of code c&p-ed directly from mupdf */
2 #include <errno.h>
3 #include <stdio.h>
4 #include <ctype.h>
5 #include <string.h>
6 #include <stdlib.h>
7 #include <signal.h>
8 #include <wchar.h>
9
10 #include <unistd.h>
11 #include <pthread.h>
12 #include <sys/time.h>
13 #include <sys/types.h>
14 #include <sys/ioctl.h>
15
16 #ifdef __CYGWIN__
17 #include <cygwin/socket.h> /* FIONREAD */
18 #else
19 #include <spawn.h>
20 #endif
21
22 #include <regex.h>
23 #include <stdarg.h>
24 #include <limits.h>
25
26 #include <GL/gl.h>
27
28 #include <caml/fail.h>
29 #include <caml/alloc.h>
30 #include <caml/memory.h>
31 #include <caml/unixsupport.h>
32
33 #include <mupdf/fitz.h>
34 #include <mupdf/cbz.h>
35 #include <mupdf/pdf.h>
36 #include <mupdf/xps.h>
37 #include <mupdf/img.h>
38
39 #include FT_FREETYPE_H
40
41 #ifdef USE_FONTCONFIG
42 #include <fontconfig/fontconfig.h>
43 #endif
44
45 #define PIGGYBACK
46
47 #ifndef __USE_GNU
48 extern char **environ;
49 #endif
50
51 #define MIN(a,b) ((a) < (b) ? (a) : (b))
52 #define MAX(a,b) ((a) > (b) ? (a) : (b))
53
54 #if defined __GNUC__
55 #define NORETURN_ATTR __attribute__ ((noreturn))
56 #define UNUSED_ATTR __attribute__ ((unused))
57 #define OPTIMIZE_ATTR(n) __attribute__ ((optimize ("O"#n)))
58 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
59 #else
60 #define NORETURN_ATTR
61 #define UNUSED_ATTR
62 #define OPTIMIZE_ATTR(n)
63 #define GCC_FMT_ATTR(a, b)
64 #endif
65
66 #define FMT_s "zu"
67
68 #define FMT_ptr "p"
69 #define FMT_ptr_cast(p) (p)
70 #define FMT_ptr_cast2(p) (p)
71
72 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
73 err (int exitcode, const char *fmt, ...)
74 {
75 va_list ap;
76 int savederrno;
77
78 savederrno = errno;
79 va_start (ap, fmt);
80 vfprintf (stderr, fmt, ap);
81 va_end (ap);
82 fprintf (stderr, ": %s\n", strerror (savederrno));
83 fflush (stderr);
84 _exit (exitcode);
85 }
86
87 static void NORETURN_ATTR GCC_FMT_ATTR (2, 3)
88 errx (int exitcode, const char *fmt, ...)
89 {
90 va_list ap;
91
92 va_start (ap, fmt);
93 vfprintf (stderr, fmt, ap);
94 va_end (ap);
95 fputc ('\n', stderr);
96 fflush (stderr);
97 _exit (exitcode);
98 }
99
100 #ifndef GL_TEXTURE_RECTANGLE_ARB
101 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
102 #endif
103
104 #ifndef GL_BGRA
105 #define GL_BGRA 0x80E1
106 #endif
107
108 #ifndef GL_UNSIGNED_INT_8_8_8_8
109 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
110 #endif
111
112 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
113 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
114 #endif
115
116 #if 0
117 #define lprintf printf
118 #else
119 #define lprintf(...)
120 #endif
121
122 #define ARSERT(cond) for (;;) { \
123 if (!(cond)) { \
124 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
125 } \
126 break; \
127 }
128
129 struct slice {
130 int h;
131 int texindex;
132 };
133
134 struct tile {
135 int w, h;
136 int slicecount;
137 int sliceheight;
138 struct pbo *pbo;
139 fz_pixmap *pixmap;
140 struct slice slices[1];
141 };
142
143 struct pagedim {
144 int pageno;
145 int rotate;
146 int left;
147 int tctmready;
148 fz_irect bounds;
149 fz_rect pagebox;
150 fz_rect mediabox;
151 fz_matrix ctm, zoomctm, lctm, tctm;
152 };
153
154 struct slink {
155 fz_irect bbox;
156 fz_link *link;
157 };
158
159 enum { DPDF, DXPS, DCBZ, DIMG };
160
161 struct page {
162 int tgen;
163 int sgen;
164 int type;
165 int pageno;
166 int pdimno;
167 fz_text_page *text;
168 fz_text_sheet *sheet;
169 union {
170 void *ptr;
171 pdf_page *pdfpage;
172 xps_page *xpspage;
173 cbz_page *cbzpage;
174 image_page *imgpage;
175 } u;
176 fz_display_list *dlist;
177 int slinkcount;
178 struct slink *slinks;
179 struct mark {
180 int i;
181 fz_text_span *span;
182 } fmark, lmark;
183 void (*freepage) (void *);
184 };
185
186 struct {
187 int type;
188 int sliceheight;
189 struct pagedim *pagedims;
190 int pagecount;
191 int pagedimcount;
192 union {
193 pdf_document *pdf;
194 xps_document *xps;
195 cbz_document *cbz;
196 image_document *img;
197 } u;
198 fz_context *ctx;
199 int w, h;
200
201 int texindex;
202 int texcount;
203 GLuint *texids;
204
205 GLenum texiform;
206 GLenum texform;
207 GLenum texty;
208
209 fz_colorspace *colorspace;
210
211 struct {
212 int w, h;
213 struct slice *slice;
214 } *texowners;
215
216 int rotate;
217 enum { FitWidth, FitProportional, FitPage } fitmodel;
218 int trimmargins;
219 int needoutline;
220 int gen;
221 int aalevel;
222
223 int trimanew;
224 fz_irect trimfuzz;
225 fz_pixmap *pig;
226
227 pthread_t thread;
228 int cr, cw;
229 FT_Face face;
230
231 void (*closedoc) (void);
232 void (*freepage) (void *);
233
234 char *trimcachepath;
235 int cxack;
236
237 GLuint stid;
238
239 int pbo_usable;
240 void (*glBindBufferARB) (GLenum, GLuint);
241 GLboolean (*glUnmapBufferARB) (GLenum);
242 void *(*glMapBufferARB) (GLenum, GLenum);
243 void (*glBufferDataARB) (GLenum, GLsizei, void *, GLenum);
244 void (*glGenBuffersARB) (GLsizei, GLuint *);
245 void (*glDeleteBuffersARB) (GLsizei, GLuint *);
246
247 GLfloat texcoords[8];
248 GLfloat vertices[16];
249 } state;
250
251 struct pbo {
252 GLuint id;
253 void *ptr;
254 size_t size;
255 };
256
257 static void UNUSED_ATTR debug_rect (const char *cap, fz_rect r)
258 {
259 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
260 }
261
262 static void UNUSED_ATTR debug_bbox (const char *cap, fz_irect r)
263 {
264 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
265 }
266
267 static void UNUSED_ATTR debug_matrix (const char *cap, fz_matrix m)
268 {
269 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
270 m.a, m.b, m.c, m.d, m.e, m.f);
271 }
272
273 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
274
275 static void lock (const char *cap)
276 {
277 int ret = pthread_mutex_lock (&mutex);
278 if (ret) {
279 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
280 }
281 }
282
283 static void unlock (const char *cap)
284 {
285 int ret = pthread_mutex_unlock (&mutex);
286 if (ret) {
287 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
288 }
289 }
290
291 static int trylock (const char *cap)
292 {
293 int ret = pthread_mutex_trylock (&mutex);
294 if (ret && ret != EBUSY) {
295 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
296 }
297 return ret == EBUSY;
298 }
299
300 static void *parse_pointer (const char *cap, const char *s)
301 {
302 int ret;
303 void *ptr;
304
305 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
306 if (ret != 1) {
307 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
308 }
309 return ptr;
310 }
311
312 static double now (void)
313 {
314 struct timeval tv;
315
316 if (gettimeofday (&tv, NULL)) {
317 err (1, "gettimeofday");
318 }
319 return tv.tv_sec + tv.tv_usec*1e-6;
320 }
321
322 static int hasdata (void)
323 {
324 int ret, avail;
325 ret = ioctl (state.cr, FIONREAD, &avail);
326 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
327 return avail > 0;
328 }
329
330 CAMLprim value ml_hasdata (value fd_v)
331 {
332 CAMLparam1 (fd_v);
333 int ret, avail;
334
335 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
336 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
337 CAMLreturn (Val_bool (avail > 0));
338 }
339
340 static void readdata (void *p, int size)
341 {
342 ssize_t n;
343
344 again:
345 n = read (state.cr, p, size);
346 if (n < 0) {
347 if (errno == EINTR) goto again;
348 err (1, "read (req %d, ret %zd)", size, n);
349 }
350 if (n - size) {
351 if (!n) errx (1, "EOF while reading");
352 errx (1, "read (req %d, ret %zd)", size, n);
353 }
354 }
355
356 static void writedata (char *p, int size)
357 {
358 ssize_t n;
359
360 p[0] = (size >> 24) & 0xff;
361 p[1] = (size >> 16) & 0xff;
362 p[2] = (size >> 8) & 0xff;
363 p[3] = (size >> 0) & 0xff;
364
365 n = write (state.cw, p, size + 4);
366 if (n - size - 4) {
367 if (!n) errx (1, "EOF while writing data");
368 err (1, "write (req %d, ret %zd)", size + 4, n);
369 }
370 }
371
372 static int readlen (void)
373 {
374 unsigned char p[4];
375
376 readdata (p, 4);
377 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
378 }
379
380 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
381 {
382 int size = 200, len;
383 va_list ap;
384 char *buf;
385
386 buf = malloc (size);
387 for (;;) {
388 if (!buf) err (1, "malloc for temp buf (%d bytes) failed", size);
389
390 va_start (ap, fmt);
391 len = vsnprintf (buf + 4, size - 4, fmt, ap);
392 va_end (ap);
393
394 if (len > -1) {
395 if (len < size - 4) {
396 writedata (buf, len);
397 break;
398 }
399 else size = len + 5;
400 }
401 else {
402 err (1, "vsnprintf for `%s' failed", fmt);
403 }
404 buf = realloc (buf, size);
405 }
406 free (buf);
407 }
408
409 static void closepdf (void)
410 {
411 if (state.u.pdf) {
412 pdf_close_document (state.u.pdf);
413 state.u.pdf = NULL;
414 }
415 }
416
417 static void closexps (void)
418 {
419 if (state.u.xps) {
420 xps_close_document (state.u.xps);
421 state.u.xps = NULL;
422 }
423 }
424
425 static void closecbz (void)
426 {
427 if (state.u.cbz) {
428 cbz_close_document (state.u.cbz);
429 state.u.cbz = NULL;
430 }
431 }
432
433 static void closeimg (void)
434 {
435 if (state.u.img) {
436 image_close_document (state.u.img);
437 state.u.img = NULL;
438 }
439 }
440
441 static void freepdfpage (void *ptr)
442 {
443 pdf_free_page (state.u.pdf, ptr);
444 }
445
446 static void freeemptyxxxpage (void *ptr)
447 {
448 (void) ptr;
449 }
450
451 static void freexpspage (void *ptr)
452 {
453 xps_free_page (state.u.xps, ptr);
454 }
455
456 static void freecbzpage (void *ptr)
457 {
458 cbz_free_page (state.u.cbz, ptr);
459 }
460
461 static void freeimgpage (void *ptr)
462 {
463 image_free_page (state.u.img, ptr);
464 }
465
466 static void openxref (char *filename, char *password)
467 {
468 int i, len;
469
470 for (i = 0; i < state.texcount; ++i) {
471 state.texowners[i].w = -1;
472 state.texowners[i].slice = NULL;
473 }
474
475 if (state.closedoc) state.closedoc ();
476
477 len = strlen (filename);
478
479 state.type = DPDF;
480 {
481 int i;
482 struct {
483 char *ext;
484 int type;
485 } tbl[] = {
486 { "pdf", DPDF },
487 { "xps", DXPS },
488 { "cbz", DCBZ },
489 { "jpg", DIMG },
490 { "jpeg", DIMG },
491 { "png", DIMG }
492 };
493
494 for (i = 0; i < sizeof (tbl) / sizeof (*tbl); ++i) {
495 int len2 = strlen (tbl[i].ext);
496
497 if (len2 < len && !strcasecmp (tbl[i].ext, filename + len - len2)) {
498 state.type = tbl[i].type;
499 break;
500 }
501 }
502 }
503
504 if (state.pagedims) {
505 free (state.pagedims);
506 state.pagedims = NULL;
507 }
508 state.pagedimcount = 0;
509
510 fz_set_aa_level (state.ctx, state.aalevel);
511 switch (state.type) {
512 case DPDF:
513 state.u.pdf = pdf_open_document (state.ctx, filename);
514 if (pdf_needs_password (state.u.pdf)) {
515 int okay = pdf_authenticate_password (state.u.pdf, password);
516 if (!okay) {
517 errx (1, "invalid password");
518 }
519 }
520 state.pagecount = pdf_count_pages (state.u.pdf);
521 state.closedoc = closepdf;
522 state.freepage = freepdfpage;
523 break;
524
525 case DXPS:
526 state.u.xps = xps_open_document (state.ctx, filename);
527 state.pagecount = xps_count_pages (state.u.xps);
528 state.closedoc = closexps;
529 state.freepage = freexpspage;
530 break;
531
532 case DCBZ:
533 state.u.cbz = cbz_open_document (state.ctx, filename);
534 state.pagecount = cbz_count_pages (state.u.cbz);
535 state.closedoc = closecbz;
536 state.freepage = freecbzpage;
537 break;
538
539 case DIMG:
540 state.u.img = image_open_document (state.ctx, filename);
541 state.pagecount = 1;
542 state.closedoc = closeimg;
543 state.freepage = freeimgpage;
544 break;
545 }
546 }
547
548 static void pdfinfo (void)
549 {
550 if (state.type == DPDF) {
551 pdf_obj *infoobj;
552
553 printd ("info PDF version\t%d.%d",
554 state.u.pdf->version / 10, state.u.pdf->version % 10);
555
556 infoobj = pdf_dict_gets (pdf_trailer (state.u.pdf), "Info");
557 if (infoobj) {
558 int i;
559 char *s;
560 char *items[] = { "Title", "Author", "Creator",
561 "Producer", "CreationDate" };
562
563 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
564 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
565 s = pdf_to_utf8 (state.u.pdf, obj);
566 if (*s) {
567 if (i == 0) {
568 printd ("title %s", s);
569 }
570 printd ("info %s\t%s", items[i], s);
571 }
572 fz_free (state.ctx, s);
573 }
574 }
575 printd ("infoend");
576 }
577 }
578
579 static void unlinktile (struct tile *tile)
580 {
581 int i;
582
583 for (i = 0; i < tile->slicecount; ++i) {
584 struct slice *s = &tile->slices[i];
585
586 if (s->texindex != -1) {
587 if (state.texowners[s->texindex].slice == s) {
588 state.texowners[s->texindex].slice = NULL;
589 }
590 }
591 }
592 }
593
594 static void freepage (struct page *page)
595 {
596 if (page->text) {
597 fz_free_text_page (state.ctx, page->text);
598 }
599 if (page->sheet) {
600 fz_free_text_sheet (state.ctx, page->sheet);
601 }
602 if (page->slinks) {
603 free (page->slinks);
604 }
605 fz_drop_display_list (state.ctx, page->dlist);
606 page->freepage (page->u.ptr);
607 free (page);
608 }
609
610 static void freetile (struct tile *tile)
611 {
612 unlinktile (tile);
613 if (!tile->pbo) {
614 #ifndef PIGGYBACK
615 fz_drop_pixmap (state.ctx, tile->pixmap);
616 #else
617 if (state.pig) {
618 fz_drop_pixmap (state.ctx, state.pig);
619 }
620 state.pig = tile->pixmap;
621 #endif
622 }
623 else {
624 free (tile->pbo);
625 fz_drop_pixmap (state.ctx, tile->pixmap);
626 }
627 free (tile);
628 }
629
630 #ifdef __ALTIVEC__
631 #include <stdint.h>
632 #include <altivec.h>
633
634 static int cacheline32bytes;
635
636 static void __attribute__ ((constructor)) clcheck (void)
637 {
638 char **envp = environ;
639 unsigned long *auxv;
640
641 while (*envp++);
642
643 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
644 if (*auxv == 19) {
645 cacheline32bytes = auxv[1] == 32;
646 return;
647 }
648 }
649 }
650
651 static void OPTIMIZE_ATTR (3) clearpixmap (fz_pixmap *pixmap)
652 {
653 size_t size = pixmap->w * pixmap->h * pixmap->n;
654 if (cacheline32bytes && size > 32) {
655 intptr_t a1, a2, diff;
656 size_t sizea, i;
657 vector unsigned char v = vec_splat_u8 (-1);
658 vector unsigned char *p;
659
660 a1 = a2 = (intptr_t) pixmap->samples;
661 a2 = (a1 + 31) & ~31;
662 diff = a2 - a1;
663 sizea = size - diff;
664 p = (void *) a2;
665
666 while (a1 != a2) *(char *) a1++ = 0xff;
667 for (i = 0; i < (sizea & ~31); i += 32) {
668 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
669 vec_st (v, i, p);
670 vec_st (v, i + 16, p);
671 }
672 while (i < sizea) *((char *) a1 + i++) = 0xff;
673 }
674 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
675 }
676 #else
677 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
678 #endif
679
680 static void trimctm (pdf_page *page, int pindex)
681 {
682 fz_matrix ctm;
683 struct pagedim *pdim = &state.pagedims[pindex];
684
685 if (!pdim->tctmready) {
686 if (state.trimmargins) {
687 fz_rect realbox;
688 fz_matrix rm, sm, tm, im, ctm1;
689
690 fz_rotate (&rm, -pdim->rotate);
691 fz_scale (&sm, 1, -1);
692 fz_concat (&ctm, &rm, &sm);
693 realbox = pdim->mediabox;
694 fz_transform_rect (&realbox, &ctm);
695 fz_translate (&tm, -realbox.x0, -realbox.y0);
696 fz_concat (&ctm1, &ctm, &tm);
697 fz_invert_matrix (&im, &page->ctm);
698 fz_concat (&ctm, &im, &ctm1);
699 }
700 else {
701 ctm = fz_identity;
702 }
703 pdim->tctm = ctm;
704 pdim->tctmready = 1;
705 }
706 }
707
708 static fz_matrix pagectm (struct page *page)
709 {
710 fz_matrix ctm, tm;
711
712 if (page->type == DPDF) {
713 trimctm (page->u.pdfpage, page->pdimno);
714 fz_concat (&ctm,
715 &state.pagedims[page->pdimno].tctm,
716 &state.pagedims[page->pdimno].ctm);
717 }
718 else {
719 struct pagedim *pdim = &state.pagedims[page->pdimno];
720
721 fz_translate (&tm, -pdim->mediabox.x0, -pdim->mediabox.y0);
722 fz_concat (&ctm, &tm, &state.pagedims[page->pdimno].ctm);
723 }
724 return ctm;
725 }
726
727 static void *loadpage (int pageno, int pindex)
728 {
729 fz_device *dev;
730 struct page *page;
731
732 page = calloc (sizeof (struct page), 1);
733 if (!page) {
734 err (1, "calloc page %d", pageno);
735 }
736
737 page->dlist = fz_new_display_list (state.ctx);
738 dev = fz_new_list_device (state.ctx, page->dlist);
739 fz_try (state.ctx) {
740 switch (state.type) {
741 case DPDF:
742 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
743 pdf_run_page (state.u.pdf, page->u.pdfpage, dev,
744 &fz_identity, NULL);
745 page->freepage = freepdfpage;
746 break;
747
748 case DXPS:
749 page->u.xpspage = xps_load_page (state.u.xps, pageno);
750 xps_run_page (state.u.xps, page->u.xpspage, dev,
751 &fz_identity, NULL);
752 page->freepage = freexpspage;
753 break;
754
755 case DCBZ:
756 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
757 cbz_run_page (state.u.cbz, page->u.cbzpage, dev,
758 &fz_identity, NULL);
759 page->freepage = freecbzpage;
760 break;
761
762 case DIMG:
763 page->u.imgpage = image_load_page (state.u.img, pageno);
764 image_run_page (state.u.img, page->u.imgpage, dev,
765 &fz_identity, NULL);
766 page->freepage = freeimgpage;
767 break;
768 }
769 }
770 fz_catch (state.ctx) {
771 page->u.ptr = NULL;
772 page->freepage = freeemptyxxxpage;
773 }
774 fz_free_device (dev);
775
776 page->pdimno = pindex;
777 page->pageno = pageno;
778 page->sgen = state.gen;
779 page->tgen = state.gen;
780 page->type = state.type;
781
782 return page;
783 }
784
785 static struct tile *alloctile (int h)
786 {
787 int i;
788 int slicecount;
789 size_t tilesize;
790 struct tile *tile;
791
792 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
793 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
794 tile = calloc (tilesize, 1);
795 if (!tile) {
796 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
797 }
798 for (i = 0; i < slicecount; ++i) {
799 int sh = MIN (h, state.sliceheight);
800 tile->slices[i].h = sh;
801 tile->slices[i].texindex = -1;
802 h -= sh;
803 }
804 tile->slicecount = slicecount;
805 tile->sliceheight = state.sliceheight;
806 return tile;
807 }
808
809 #ifdef OBSCURED_OPT
810 struct obs {
811 int cured;
812 fz_irect b;
813 };
814
815 static void obs_fill_image (fz_device *dev, fz_image *image,
816 const fz_matrix *ctm, float alpha)
817 {
818 struct obs *obs = dev->user;
819
820 if (!obs->cured && fabs (1.0 - alpha) < 1e6) {
821 fz_irect b;
822 fz_rect rect = fz_unit_rect;
823
824 fz_transform_rect (&rect, ctm);
825 fz_round_rect (&b, &rect);
826 fz_intersect_irect (&b, &obs->b);
827 obs->cured = b.x0 == obs->b.x0
828 && b.x1 == obs->b.x1
829 && b.y0 == obs->b.y0
830 && b.y1 == obs->b.y1;
831 }
832 }
833
834 static int obscured (struct page *page, fz_irect bbox)
835 {
836 fz_rect rect;
837 fz_matrix ctm;
838 fz_device dev;
839 struct obs obs;
840
841 memset (&dev, 0, sizeof (dev));
842 memset (&obs, 0, sizeof (obs));
843 dev.hints = 0;
844 dev.flags = 0;
845 dev.user = &obs;
846 dev.ctx = state.ctx;
847 dev.fill_image = obs_fill_image;
848 obs.b = bbox;
849 fz_rect_from_irect (&rect, &bbox);
850 ctm = pagectm (page);
851 fz_run_display_list (page->dlist, &dev, &ctm, &rect, NULL);
852 return obs.cured;
853 }
854 #define OBSCURED obscured
855 #else
856 #define OBSCURED(a, b) 0
857 #endif
858
859 static struct tile *rendertile (struct page *page, int x, int y, int w, int h,
860 struct pbo *pbo)
861 {
862 fz_rect rect;
863 fz_irect bbox;
864 fz_matrix ctm;
865 fz_device *dev;
866 struct tile *tile;
867 struct pagedim *pdim;
868
869 tile = alloctile (h);
870 pdim = &state.pagedims[page->pdimno];
871
872 bbox = pdim->bounds;
873 bbox.x0 += x;
874 bbox.y0 += y;
875 bbox.x1 = bbox.x0 + w;
876 bbox.y1 = bbox.y0 + h;
877
878 if (state.pig) {
879 if (state.pig->w == w
880 && state.pig->h == h
881 && state.pig->colorspace == state.colorspace) {
882 tile->pixmap = state.pig;
883 tile->pixmap->x = bbox.x0;
884 tile->pixmap->y = bbox.y0;
885 }
886 else {
887 fz_drop_pixmap (state.ctx, state.pig);
888 }
889 state.pig = NULL;
890 }
891 if (!tile->pixmap) {
892 if (pbo) {
893 tile->pixmap =
894 fz_new_pixmap_with_bbox_and_data (state.ctx, state.colorspace,
895 &bbox, pbo->ptr);
896 tile->pbo = pbo;
897 }
898 else {
899 tile->pixmap =
900 fz_new_pixmap_with_bbox (state.ctx, state.colorspace, &bbox);
901 }
902 }
903
904 tile->w = w;
905 tile->h = h;
906 if (!page->u.ptr || ((w < 128 && h < 128) || !OBSCURED (page, bbox))) {
907 clearpixmap (tile->pixmap);
908 }
909 dev = fz_new_draw_device (state.ctx, tile->pixmap);
910 ctm = pagectm (page);
911 fz_rect_from_irect (&rect, &bbox);
912 fz_run_display_list (page->dlist, dev, &ctm, &rect, NULL);
913 fz_free_device (dev);
914
915 return tile;
916 }
917
918 static void initpdims (void)
919 {
920 double start, end;
921 FILE *trimf = NULL;
922 fz_rect rootmediabox;
923 int pageno, trim, show;
924 int trimw = 0, cxcount;
925
926 start = now ();
927
928 if (state.trimmargins && state.trimcachepath) {
929 trimf = fopen (state.trimcachepath, "rb");
930 if (!trimf) {
931 trimf = fopen (state.trimcachepath, "wb");
932 trimw = 1;
933 }
934 }
935
936 if (state.trimmargins || state.type == DPDF || !state.cxack)
937 cxcount = state.pagecount;
938 else
939 cxcount = MIN (state.pagecount, 1);
940
941 if (state.type == DPDF) {
942 pdf_obj *obj;
943 obj = pdf_dict_getp (pdf_trailer (state.u.pdf),
944 "Root/Pages/MediaBox");
945 pdf_to_rect (state.ctx, obj, &rootmediabox);
946 }
947
948 for (pageno = 0; pageno < cxcount; ++pageno) {
949 int rotate = 0;
950 struct pagedim *p;
951 fz_rect mediabox;
952
953 switch (state.type) {
954 case DPDF: {
955 pdf_document *pdf = state.u.pdf;
956 pdf_obj *pageref = pdf_lookup_page_obj (pdf, pageno);
957 pdf_obj *pageobj = pdf_resolve_indirect (pageref);
958
959 if (state.trimmargins) {
960 pdf_obj *obj;
961 pdf_page *page;
962
963 fz_try (state.ctx) {
964 page = pdf_load_page (pdf, pageno);
965 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
966 trim = state.trimanew || !obj;
967 if (trim) {
968 fz_rect rect;
969 fz_matrix ctm;
970 fz_device *dev;
971
972 dev = fz_new_bbox_device (state.ctx, &rect);
973 dev->hints |= FZ_IGNORE_SHADE;
974 fz_invert_matrix (&ctm, &page->ctm);
975 pdf_run_page (pdf, page, dev, &fz_identity, NULL);
976 fz_free_device (dev);
977
978 rect.x0 += state.trimfuzz.x0;
979 rect.x1 += state.trimfuzz.x1;
980 rect.y0 += state.trimfuzz.y0;
981 rect.y1 += state.trimfuzz.y1;
982 fz_transform_rect (&rect, &ctm);
983 fz_intersect_rect (&rect, &page->mediabox);
984
985 if (fz_is_empty_rect (&rect)) {
986 mediabox = page->mediabox;
987 }
988 else {
989 mediabox = rect;
990 }
991
992 obj = pdf_new_array (pdf, 4);
993 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x0));
994 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y0));
995 pdf_array_push (obj, pdf_new_real (pdf, mediabox.x1));
996 pdf_array_push (obj, pdf_new_real (pdf, mediabox.y1));
997 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
998 }
999 else {
1000 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
1001 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
1002 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
1003 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
1004 }
1005
1006 rotate = page->rotate;
1007 pdf_free_page (pdf, page);
1008
1009 show = trim ? pageno % 5 == 0 : pageno % 20 == 0;
1010 if (show) {
1011 printd ("progress %f Trimming %d",
1012 (double) (pageno + 1) / state.pagecount,
1013 pageno + 1);
1014 }
1015 }
1016 fz_catch (state.ctx) {
1017 fprintf (stderr, "failed to load page %d\n", pageno+1);
1018 }
1019 }
1020 else {
1021 int empty = 0;
1022 fz_rect cropbox;
1023
1024 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "MediaBox"),
1025 &mediabox);
1026 if (fz_is_empty_rect (&mediabox)) {
1027 mediabox.x0 = 0;
1028 mediabox.y0 = 0;
1029 mediabox.x1 = 612;
1030 mediabox.y1 = 792;
1031 empty = 1;
1032 }
1033
1034 pdf_to_rect (state.ctx, pdf_dict_gets (pageobj, "CropBox"),
1035 &cropbox);
1036 if (!fz_is_empty_rect (&cropbox)) {
1037 if (empty) {
1038 mediabox = cropbox;
1039 }
1040 else {
1041 fz_intersect_rect (&mediabox, &cropbox);
1042 }
1043 }
1044 else {
1045 if (empty) {
1046 if (fz_is_empty_rect (&rootmediabox)) {
1047 fprintf (stderr,
1048 "cannot find page size for page %d\n",
1049 pageno+1);
1050 }
1051 else {
1052 mediabox = rootmediabox;
1053 }
1054 }
1055 }
1056 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
1057 }
1058 break;
1059 }
1060
1061 case DXPS:
1062 {
1063 xps_page *page;
1064
1065 fz_try (state.ctx) {
1066 page = xps_load_page (state.u.xps, pageno);
1067 xps_bound_page (state.u.xps, page, &mediabox);
1068 rotate = 0;
1069 if (state.trimmargins) {
1070 fz_rect rect;
1071 fz_device *dev;
1072
1073 dev = fz_new_bbox_device (state.ctx, &rect);
1074 dev->hints |= FZ_IGNORE_SHADE;
1075 xps_run_page (state.u.xps, page, dev,
1076 &fz_identity, NULL);
1077 fz_free_device (dev);
1078
1079 rect.x0 += state.trimfuzz.x0;
1080 rect.x1 += state.trimfuzz.x1;
1081 rect.y0 += state.trimfuzz.y0;
1082 rect.y1 += state.trimfuzz.y1;
1083 fz_intersect_rect (&rect, &mediabox);
1084
1085 if (!fz_is_empty_rect (&rect)) {
1086 mediabox = rect;
1087 }
1088 }
1089 xps_free_page (state.u.xps, page);
1090 if (!state.cxack) {
1091 printd ("progress %f loading %d",
1092 (double) (pageno + 1) / state.pagecount,
1093 pageno + 1);
1094 }
1095 }
1096 fz_catch (state.ctx) {
1097 }
1098 }
1099 break;
1100
1101 case DCBZ:
1102 {
1103 rotate = 0;
1104 mediabox.x0 = 0;
1105 mediabox.y0 = 0;
1106 mediabox.x1 = 900;
1107 mediabox.y1 = 900;
1108 if (state.trimmargins && trimw) {
1109 cbz_page *page;
1110
1111 fz_try (state.ctx) {
1112 page = cbz_load_page (state.u.cbz, pageno);
1113 cbz_bound_page (state.u.cbz, page, &mediabox);
1114 cbz_free_page (state.u.cbz, page);
1115 printd ("progress %f Trimming %d",
1116 (double) (pageno + 1) / state.pagecount,
1117 pageno + 1);
1118 }
1119 fz_catch (state.ctx) {
1120 fprintf (stderr, "failed to load page %d\n", pageno+1);
1121 }
1122 if (trimf) {
1123 int n = fwrite (&mediabox, sizeof (mediabox), 1, trimf);
1124 if (n - 1) {
1125 err (1, "fwrite trim mediabox");
1126 }
1127 }
1128 }
1129 else {
1130 if (trimf) {
1131 int n = fread (&mediabox, sizeof (mediabox), 1, trimf);
1132 if (n - 1) {
1133 err (1, "fread trim mediabox");
1134 }
1135 }
1136 else {
1137 if (state.cxack) {
1138 cbz_page *page;
1139 fz_try (state.ctx) {
1140 page = cbz_load_page (state.u.cbz, pageno);
1141 cbz_bound_page (state.u.cbz, page, &mediabox);
1142 cbz_free_page (state.u.cbz, page);
1143 }
1144 fz_catch (state.ctx) {
1145 fprintf (stderr, "failed to load cbz page\n");
1146 }
1147 }
1148 }
1149 }
1150 }
1151 break;
1152
1153 case DIMG:
1154 {
1155 image_page *page;
1156
1157 rotate = 0;
1158 mediabox.x0 = 0;
1159 mediabox.y0 = 0;
1160 mediabox.x1 = 900;
1161 mediabox.y1 = 900;
1162
1163 fz_try (state.ctx) {
1164 page = image_load_page (state.u.img, pageno);
1165 image_bound_page (state.u.img, page, &mediabox);
1166 image_free_page (state.u.img, page);
1167 }
1168 fz_catch (state.ctx) {
1169 fprintf (stderr, "failed to load page %d\n", pageno+1);
1170 }
1171 }
1172 break;
1173
1174 default:
1175 ARSERT (0 && state.type);
1176 }
1177
1178 if (state.pagedimcount == 0
1179 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
1180 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
1181 size_t size;
1182
1183 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
1184 state.pagedims = realloc (state.pagedims, size);
1185 if (!state.pagedims) {
1186 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
1187 size, state.pagedimcount + 1);
1188 }
1189
1190 p = &state.pagedims[state.pagedimcount++];
1191 p->rotate = rotate;
1192 p->mediabox = mediabox;
1193 p->pageno = pageno;
1194 }
1195 }
1196 end = now ();
1197 if (state.trimmargins) {
1198 printd ("progress 1 Trimmed %d pages in %f seconds",
1199 state.pagecount, end - start);
1200 }
1201 else {
1202 printd ("vmsg Processed %d pages in %f seconds",
1203 state.pagecount, end - start);
1204 }
1205 state.trimanew = 0;
1206 if (trimf) {
1207 if (fclose (trimf)) {
1208 err (1, "fclose");
1209 }
1210 }
1211 }
1212
1213 static void layout (void)
1214 {
1215 int pindex;
1216 fz_rect box;
1217 fz_matrix ctm, rm;
1218 struct pagedim *p = p;
1219 double zw, w, maxw = 0.0, zoom = zoom;
1220
1221 if (state.pagedimcount == 0) return;
1222
1223 switch (state.fitmodel) {
1224 case FitProportional:
1225 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1226 double x0, x1;
1227
1228 p = &state.pagedims[pindex];
1229 fz_rotate (&rm, p->rotate + state.rotate);
1230 box = p->mediabox;
1231 fz_transform_rect (&box, &rm);
1232
1233 x0 = MIN (box.x0, box.x1);
1234 x1 = MAX (box.x0, box.x1);
1235
1236 w = x1 - x0;
1237 maxw = MAX (w, maxw);
1238 zoom = state.w / maxw;
1239 }
1240 break;
1241
1242 case FitPage:
1243 maxw = state.w;
1244 break;
1245
1246 case FitWidth:
1247 break;
1248
1249 default:
1250 ARSERT (0 && state.fitmodel);
1251 }
1252
1253 for (pindex = 0; pindex < state.pagedimcount; ++pindex) {
1254 fz_rect rect;
1255 fz_matrix tm, sm;
1256
1257 p = &state.pagedims[pindex];
1258 fz_rotate (&ctm, state.rotate);
1259 fz_rotate (&rm, p->rotate + state.rotate);
1260 box = p->mediabox;
1261 fz_transform_rect (&box, &rm);
1262 w = box.x1 - box.x0;
1263 switch (state.fitmodel) {
1264 case FitProportional:
1265 p->left = ((maxw - w) * zoom) / 2.0;
1266 break;
1267 case FitPage:
1268 {
1269 double zh, h;
1270 zw = maxw / w;
1271 h = box.y1 - box.y0;
1272 zh = state.h / h;
1273 zoom = MIN (zw, zh);
1274 p->left = (maxw - (w * zoom)) / 2.0;
1275 }
1276 break;
1277 case FitWidth:
1278 p->left = 0;
1279 zoom = state.w / w;
1280 break;
1281 }
1282
1283 fz_scale (&p->zoomctm, zoom, zoom);
1284 fz_concat (&ctm, &p->zoomctm, &ctm);
1285
1286 fz_rotate (&rm, p->rotate);
1287 p->pagebox = p->mediabox;
1288 fz_transform_rect (&p->pagebox, &rm);
1289 p->pagebox.x1 -= p->pagebox.x0;
1290 p->pagebox.y1 -= p->pagebox.y0;
1291 p->pagebox.x0 = 0;
1292 p->pagebox.y0 = 0;
1293 rect = p->pagebox;
1294 fz_transform_rect (&rect, &ctm);
1295 fz_round_rect (&p->bounds, &rect);
1296 p->ctm = ctm;
1297
1298 fz_translate (&tm, 0, -p->mediabox.y1);
1299 fz_scale (&sm, zoom, -zoom);
1300 fz_concat (&ctm, &tm, &sm);
1301 fz_concat (&p->lctm, &ctm, &rm);
1302
1303 p->tctmready = 0;
1304 }
1305
1306 do {
1307 int x0 = MIN (p->bounds.x0, p->bounds.x1);
1308 int y0 = MIN (p->bounds.y0, p->bounds.y1);
1309 int x1 = MAX (p->bounds.x0, p->bounds.x1);
1310 int y1 = MAX (p->bounds.y0, p->bounds.y1);
1311 int w = x1 - x0;
1312 int h = y1 - y0;
1313
1314 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
1315 } while (p-- != state.pagedims);
1316 }
1317
1318 static
1319 struct anchor { int n; int x; int y; int w; int h; }
1320 desttoanchor (fz_link_dest *dest)
1321 {
1322 int i;
1323 struct anchor a;
1324 struct pagedim *pdim = state.pagedims;
1325
1326 a.n = -1;
1327 a.x = 0;
1328 a.y = 0;
1329 for (i = 0; i < state.pagedimcount; ++i) {
1330 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1331 break;
1332 pdim = &state.pagedims[i];
1333 }
1334 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1335 fz_point p;
1336 if (dest->ld.gotor.flags & fz_link_flag_l_valid)
1337 p.x = dest->ld.gotor.lt.x;
1338 else
1339 p.x = 0.0;
1340 p.y = dest->ld.gotor.lt.y;
1341 fz_transform_point (&p, &pdim->lctm);
1342 a.y = p.y;
1343 a.x = p.x;
1344 }
1345 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1346 double x0, x1, y0, y1;
1347
1348 x0 = MIN (pdim->bounds.x0, pdim->bounds.x1);
1349 x1 = MAX (pdim->bounds.x0, pdim->bounds.x1);
1350 a.w = x1 - x0;
1351 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1352 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1353 a.h = y1 - y0;
1354 a.n = dest->ld.gotor.page;
1355 }
1356 return a;
1357 }
1358
1359 static void recurse_outline (fz_outline *outline, int level)
1360 {
1361 while (outline) {
1362 switch (outline->dest.kind) {
1363 case FZ_LINK_GOTO:
1364 {
1365 struct anchor a = desttoanchor (&outline->dest);
1366
1367 if (a.n >= 0) {
1368 printd ("o %d %d %d %d %s",
1369 level, a.n, a.y, a.h, outline->title);
1370 }
1371 }
1372 break;
1373
1374 case FZ_LINK_URI:
1375 printd ("ou %d %" FMT_s " %s %s", level,
1376 strlen (outline->title), outline->title,
1377 outline->dest.ld.uri.uri);
1378 break;
1379
1380 case FZ_LINK_NONE:
1381 printd ("on %d %s", level, outline->title);
1382 break;
1383
1384 default:
1385 printd ("emsg Unhandled outline kind %d for %s\n",
1386 outline->dest.kind, outline->title);
1387 break;
1388 }
1389 if (outline->down) {
1390 recurse_outline (outline->down, level + 1);
1391 }
1392 outline = outline->next;
1393 }
1394 }
1395
1396 static void process_outline (void)
1397 {
1398 fz_outline *outline;
1399
1400 if (!state.needoutline) return;
1401
1402 state.needoutline = 0;
1403 switch (state.type) {
1404 case DPDF:
1405 outline = pdf_load_outline (state.u.pdf);
1406 break;
1407 case DXPS:
1408 outline = xps_load_outline (state.u.xps);
1409 break;
1410 default:
1411 outline = NULL;
1412 break;
1413 }
1414 if (outline) {
1415 recurse_outline (outline, 0);
1416 fz_free_outline (state.ctx, outline);
1417 }
1418 }
1419
1420 static char *strofspan (fz_text_span *span)
1421 {
1422 char *p;
1423 char utf8[10];
1424 fz_text_char *ch;
1425 size_t size = 0, cap = 80;
1426
1427 p = malloc (cap + 1);
1428 if (!p) return NULL;
1429
1430 for (ch = span->text; ch < span->text + span->len; ++ch) {
1431 int n = fz_runetochar (utf8, ch->c);
1432 if (size + n > cap) {
1433 cap *= 2;
1434 p = realloc (p, cap + 1);
1435 if (!p) return NULL;
1436 }
1437
1438 memcpy (p + size, utf8, n);
1439 size += n;
1440 }
1441 p[size] = 0;
1442 return p;
1443 }
1444
1445 static int matchspan (regex_t *re, fz_text_page *page,
1446 fz_text_span *span, fz_matrix ctm,
1447 int stop, int pageno, double start)
1448 {
1449 int ret;
1450 char *p;
1451 regmatch_t rm;
1452 int a, b, c;
1453 fz_rect sb, eb;
1454 fz_point p1, p2, p3, p4;
1455
1456 p = strofspan (span);
1457 if (!p) return -1;
1458
1459 ret = regexec (re, p, 1, &rm, 0);
1460 if (ret) {
1461 free (p);
1462 if (ret != REG_NOMATCH) {
1463 size_t size;
1464 char errbuf[80];
1465 size = regerror (ret, re, errbuf, sizeof (errbuf));
1466 printd ("msg regexec error `%.*s'",
1467 (int) size, errbuf);
1468 return -1;
1469 }
1470 return 0;
1471 }
1472 else {
1473 int l = span->len;
1474
1475 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1476 c += fz_runelen (span->text[a].c);
1477 }
1478 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1479 c += fz_runelen (span->text[b].c);
1480 }
1481
1482 if (fz_runelen (span->text[b].c) > 1) {
1483 b = MAX (0, b-1);
1484 }
1485
1486 fz_text_char_bbox (&sb, span, a);
1487 fz_text_char_bbox (&eb, span, b);
1488
1489 p1.x = sb.x0;
1490 p1.y = sb.y0;
1491 p2.x = eb.x1;
1492 p2.y = sb.y0;
1493 p3.x = eb.x1;
1494 p3.y = eb.y1;
1495 p4.x = sb.x0;
1496 p4.y = eb.y1;
1497
1498 if (!stop) {
1499 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1500 pageno, 1,
1501 p1.x, p1.y,
1502 p2.x, p2.y,
1503 p3.x, p3.y,
1504 p4.x, p4.y);
1505
1506 printd ("progress 1 found at %d `%.*s' in %f sec",
1507 pageno + 1, (int) (rm.rm_eo - rm.rm_so), &p[rm.rm_so],
1508 now () - start);
1509 }
1510 else {
1511 printd ("match %d %d %f %f %f %f %f %f %f %f",
1512 pageno, 2,
1513 p1.x, p1.y,
1514 p2.x, p2.y,
1515 p3.x, p3.y,
1516 p4.x, p4.y);
1517 }
1518 free (p);
1519 return 1;
1520 }
1521 }
1522
1523 static int compareblocks (const void *l, const void *r)
1524 {
1525 fz_text_block const *ls = l;
1526 fz_text_block const* rs = r;
1527 return ls->bbox.y0 - rs->bbox.y0;
1528 }
1529
1530 /* wishful thinking function */
1531 static void search (regex_t *re, int pageno, int y, int forward)
1532 {
1533 int i, j;
1534 fz_matrix ctm;
1535 fz_device *tdev;
1536 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1537 fz_text_page *text;
1538 fz_text_sheet *sheet;
1539 struct pagedim *pdim, *pdimprev;
1540 int stop = 0, niters = 0;
1541 double start, end;
1542
1543 if (!(state.type == DPDF || state.type == DXPS))
1544 return;
1545
1546 start = now ();
1547 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1548 if (niters++ == 5) {
1549 niters = 0;
1550 if (hasdata ()) {
1551 printd ("progress 1 attention requested aborting search at %d",
1552 pageno);
1553 stop = 1;
1554 }
1555 else {
1556 printd ("progress %f searching in page %d",
1557 (double) (pageno + 1) / state.pagecount,
1558 pageno);
1559 }
1560 }
1561 pdimprev = NULL;
1562 for (i = 0; i < state.pagedimcount; ++i) {
1563 pdim = &state.pagedims[i];
1564 if (pdim->pageno == pageno) {
1565 goto found;
1566 }
1567 if (pdim->pageno > pageno) {
1568 pdim = pdimprev;
1569 goto found;
1570 }
1571 pdimprev = pdim;
1572 }
1573 pdim = pdimprev;
1574 found:
1575
1576 sheet = fz_new_text_sheet (state.ctx);
1577 text = fz_new_text_page (state.ctx);
1578 tdev = fz_new_text_device (state.ctx, sheet, text);
1579
1580 switch (state.type) {
1581 case DPDF:
1582 u.ptr = NULL;
1583 fz_try (state.ctx) {
1584 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1585 trimctm (u.pdfpage, pdim - state.pagedims);
1586 fz_concat (&ctm, &pdim->tctm, &pdim->zoomctm);
1587 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
1588 pdf_run_page (state.u.pdf, u.pdfpage, tdev, &ctm, NULL);
1589 fz_end_page (tdev);
1590 }
1591 fz_catch (state.ctx) {
1592 fz_free_device (tdev);
1593 u.ptr = NULL;
1594 goto nextiter;
1595 }
1596 break;
1597
1598 case DXPS:
1599 u.xpspage = xps_load_page (state.u.xps, pageno);
1600 xps_run_page (state.u.xps, u.xpspage, tdev, &pdim->ctm, NULL);
1601 break;
1602
1603 default:
1604 ARSERT (0 && state.type);
1605 }
1606
1607 qsort (text->blocks, text->len, sizeof (*text->blocks), compareblocks);
1608 fz_free_device (tdev);
1609
1610 for (j = 0; j < text->len; ++j) {
1611 int k;
1612 fz_page_block *pb;
1613 fz_text_block *block;
1614
1615 pb = &text->blocks[forward ? j : text->len - 1 - j];
1616 if (pb->type != FZ_PAGE_BLOCK_TEXT) continue;
1617 block = pb->u.text;
1618
1619 for (k = 0; k < block->len; ++k) {
1620 fz_text_line *line;
1621 fz_text_span *span;
1622
1623 if (forward) {
1624 line = &block->lines[k];
1625 if (line->bbox.y0 < y + 1) continue;
1626 }
1627 else {
1628 line = &block->lines[block->len - 1 - k];
1629 if (line->bbox.y0 > y - 1) continue;
1630 }
1631
1632 for (span = line->first_span; span; span = span->next) {
1633 switch (matchspan (re, text, span, ctm,
1634 stop, pageno, start)) {
1635 case 0: break;
1636 case 1: stop = 1; break;
1637 case -1: stop = 1; goto endloop;
1638 }
1639 }
1640 }
1641 }
1642 nextiter:
1643 if (forward) {
1644 pageno += 1;
1645 y = 0;
1646 }
1647 else {
1648 pageno -= 1;
1649 y = INT_MAX;
1650 }
1651 endloop:
1652 fz_free_text_page (state.ctx, text);
1653 fz_free_text_sheet (state.ctx, sheet);
1654 if (u.ptr) {
1655 state.freepage (u.ptr);
1656 }
1657 }
1658 end = now ();
1659 if (!stop) {
1660 printd ("progress 1 no matches %f sec", end - start);
1661 }
1662 printd ("clearrects");
1663 }
1664
1665 static void set_tex_params (int colorspace)
1666 {
1667 union {
1668 unsigned char b;
1669 unsigned int s;
1670 } endianness = {1};
1671
1672 switch (colorspace) {
1673 case 0:
1674 state.texiform = GL_RGBA8;
1675 state.texform = GL_RGBA;
1676 state.texty = GL_UNSIGNED_BYTE;
1677 state.colorspace = fz_device_rgb (state.ctx);
1678 break;
1679 case 1:
1680 state.texiform = GL_RGBA8;
1681 state.texform = GL_BGRA;
1682 state.texty = endianness.s > 1
1683 ? GL_UNSIGNED_INT_8_8_8_8
1684 : GL_UNSIGNED_INT_8_8_8_8_REV;
1685 state.colorspace = fz_device_bgr (state.ctx);
1686 break;
1687 case 2:
1688 state.texiform = GL_LUMINANCE_ALPHA;
1689 state.texform = GL_LUMINANCE_ALPHA;
1690 state.texty = GL_UNSIGNED_BYTE;
1691 state.colorspace = fz_device_gray (state.ctx);
1692 break;
1693 default:
1694 errx (1, "invalid colorspce %d", colorspace);
1695 }
1696 }
1697
1698 static void realloctexts (int texcount)
1699 {
1700 size_t size;
1701
1702 if (texcount == state.texcount) return;
1703
1704 if (texcount < state.texcount) {
1705 glDeleteTextures (state.texcount - texcount,
1706 state.texids + texcount);
1707 }
1708
1709 size = texcount * sizeof (*state.texids);
1710 state.texids = realloc (state.texids, size);
1711 if (!state.texids) {
1712 err (1, "realloc texids %" FMT_s, size);
1713 }
1714
1715 size = texcount * sizeof (*state.texowners);
1716 state.texowners = realloc (state.texowners, size);
1717 if (!state.texowners) {
1718 err (1, "realloc texowners %" FMT_s, size);
1719 }
1720 if (texcount > state.texcount) {
1721 int i;
1722
1723 glGenTextures (texcount - state.texcount,
1724 state.texids + state.texcount);
1725 for (i = state.texcount; i < texcount; ++i) {
1726 state.texowners[i].w = -1;
1727 state.texowners[i].slice = NULL;
1728 }
1729 }
1730 state.texcount = texcount;
1731 state.texindex = 0;
1732 }
1733
1734 static char *mbtoutf8 (char *s)
1735 {
1736 char *p, *r;
1737 wchar_t *tmp;
1738 size_t i, ret, len;
1739
1740 len = mbstowcs (NULL, s, strlen (s));
1741 if (len == 0) {
1742 return s;
1743 }
1744 else {
1745 if (len == (size_t) -1) {
1746 return s;
1747 }
1748 }
1749
1750 tmp = malloc (len * sizeof (wchar_t));
1751 if (!tmp) {
1752 return s;
1753 }
1754
1755 ret = mbstowcs (tmp, s, len);
1756 if (ret == (size_t) -1) {
1757 free (tmp);
1758 return s;
1759 }
1760
1761 len = 0;
1762 for (i = 0; i < ret; ++i) {
1763 len += fz_runelen (tmp[i]);
1764 }
1765
1766 p = r = malloc (len + 1);
1767 if (!r) {
1768 free (tmp);
1769 return s;
1770 }
1771
1772 for (i = 0; i < ret; ++i) {
1773 p += fz_runetochar (p, tmp[i]);
1774 }
1775 *p = 0;
1776 free (tmp);
1777 return r;
1778 }
1779
1780 CAMLprim value ml_mbtoutf8 (value s_v)
1781 {
1782 CAMLparam1 (s_v);
1783 CAMLlocal1 (ret_v);
1784 char *s, *r;
1785
1786 s = String_val (s_v);
1787 r = mbtoutf8 (s);
1788 if (r == s) {
1789 ret_v = s_v;
1790 }
1791 else {
1792 ret_v = caml_copy_string (r);
1793 free (r);
1794 }
1795 CAMLreturn (ret_v);
1796 }
1797
1798 static void * mainloop (void *unused)
1799 {
1800 char *p = NULL;
1801 int len, ret, oldlen = 0;
1802
1803 for (;;) {
1804 len = readlen ();
1805 if (len == 0) {
1806 errx (1, "readlen returned 0");
1807 }
1808
1809 if (oldlen < len + 1) {
1810 p = realloc (p, len + 1);
1811 if (!p) {
1812 err (1, "realloc %d failed", len + 1);
1813 }
1814 oldlen = len + 1;
1815 }
1816 readdata (p, len);
1817 p[len] = 0;
1818
1819 if (!strncmp ("open", p, 4)) {
1820 int wthack, off;
1821 char *password;
1822 char *filename;
1823 char *utf8filename;
1824 size_t filenamelen;
1825
1826 ret = sscanf (p + 5, " %d %d %n", &wthack, &state.cxack, &off);
1827 if (ret != 2) {
1828 errx (1, "malformed open `%.*s' ret=%d", len, p, ret);
1829 }
1830
1831 filename = p + 5 + off;
1832 filenamelen = strlen (filename);
1833 password = filename + filenamelen + 1;
1834
1835 lock ("open");
1836 openxref (filename, password);
1837 pdfinfo ();
1838 initpdims ();
1839 unlock ("open");
1840
1841 if (!wthack) {
1842 utf8filename = mbtoutf8 (filename);
1843 printd ("msg Opened %s (press h/F1 to get help)", utf8filename);
1844 if (utf8filename != filename) {
1845 free (utf8filename);
1846 }
1847 }
1848 state.needoutline = 1;
1849 }
1850 else if (!strncmp ("cs", p, 2)) {
1851 int i, colorspace;
1852
1853 ret = sscanf (p + 2, " %d", &colorspace);
1854 if (ret != 1) {
1855 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1856 }
1857 lock ("cs");
1858 set_tex_params (colorspace);
1859 for (i = 0; i < state.texcount; ++i) {
1860 state.texowners[i].w = -1;
1861 state.texowners[i].slice = NULL;
1862 }
1863 unlock ("cs");
1864 }
1865 else if (!strncmp ("freepage", p, 8)) {
1866 void *ptr;
1867
1868 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1869 if (ret != 1) {
1870 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1871 }
1872 freepage (ptr);
1873 }
1874 else if (!strncmp ("freetile", p, 8)) {
1875 void *ptr;
1876
1877 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1878 if (ret != 1) {
1879 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1880 }
1881 freetile (ptr);
1882 }
1883 else if (!strncmp ("search", p, 6)) {
1884 int icase, pageno, y, ret, len2, forward;
1885 char *pattern;
1886 regex_t re;
1887
1888 ret = sscanf (p + 6, " %d %d %d %d,%n",
1889 &icase, &pageno, &y, &forward, &len2);
1890 if (ret != 4) {
1891 errx (1, "malformed search `%s' ret=%d", p, ret);
1892 }
1893
1894 pattern = p + 6 + len2;
1895 ret = regcomp (&re, pattern,
1896 REG_EXTENDED | (icase ? REG_ICASE : 0));
1897 if (ret) {
1898 char errbuf[80];
1899 size_t size;
1900
1901 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1902 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1903 }
1904 else {
1905 search (&re, pageno, y, forward);
1906 regfree (&re);
1907 }
1908 }
1909 else if (!strncmp ("geometry", p, 8)) {
1910 int w, h, fitmodel;
1911
1912 printd ("clear");
1913 ret = sscanf (p + 8, " %d %d %d", &w, &h, &fitmodel);
1914 if (ret != 3) {
1915 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1916 }
1917
1918 lock ("geometry");
1919 state.h = h;
1920 if (w != state.w) {
1921 int i;
1922 state.w = w;
1923 for (i = 0; i < state.texcount; ++i) {
1924 state.texowners[i].slice = NULL;
1925 }
1926 }
1927 state.fitmodel = fitmodel;
1928 layout ();
1929 process_outline ();
1930
1931 state.gen++;
1932 unlock ("geometry");
1933 printd ("continue %d", state.pagecount);
1934 }
1935 else if (!strncmp ("reqlayout", p, 9)) {
1936 char *nameddest;
1937 int rotate, fitmodel, off, h;
1938
1939 printd ("clear");
1940 ret = sscanf (p + 9, " %d %d %d %n",
1941 &rotate, &fitmodel, &h, &off);
1942 if (ret != 3) {
1943 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1944 }
1945 lock ("reqlayout");
1946 if (state.rotate != rotate || state.fitmodel != fitmodel) {
1947 state.gen += 1;
1948 }
1949 state.rotate = rotate;
1950 state.fitmodel = fitmodel;
1951 state.h = h;
1952 layout ();
1953 process_outline ();
1954
1955 nameddest = p + 9 + off;
1956 if (state.type == DPDF && nameddest && *nameddest) {
1957 struct anchor a;
1958 fz_link_dest dest;
1959 pdf_obj *needle, *obj;
1960
1961 needle = pdf_new_string (state.u.pdf, nameddest,
1962 strlen (nameddest));
1963 obj = pdf_lookup_dest (state.u.pdf, needle);
1964 if (obj) {
1965 dest = pdf_parse_link_dest (state.u.pdf, FZ_LINK_GOTO, obj);
1966
1967 a = desttoanchor (&dest);
1968 if (a.n >= 0) {
1969 printd ("a %d %d %d", a.n, a.x, a.y);
1970 }
1971 else {
1972 printd ("emsg failed to parse destination `%s'\n",
1973 nameddest);
1974 }
1975 }
1976 else {
1977 printd ("emsg destination `%s' not found\n",
1978 nameddest);
1979 }
1980 pdf_drop_obj (needle);
1981 }
1982
1983 state.gen++;
1984 unlock ("reqlayout");
1985 printd ("continue %d", state.pagecount);
1986 }
1987 else if (!strncmp ("page", p, 4)) {
1988 double a, b;
1989 struct page *page;
1990 int pageno, pindex, ret;
1991
1992 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1993 if (ret != 2) {
1994 errx (1, "bad page line `%.*s' ret=%d", len, p, ret);
1995 }
1996
1997 lock ("page");
1998 a = now ();
1999 page = loadpage (pageno, pindex);
2000 b = now ();
2001 unlock ("page");
2002
2003 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
2004 }
2005 else if (!strncmp ("tile", p, 4)) {
2006 int x, y, w, h, ret;
2007 struct page *page;
2008 struct tile *tile;
2009 double a, b;
2010 void *data;
2011
2012 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d %" FMT_ptr,
2013 FMT_ptr_cast (&page), &x, &y, &w, &h, &data);
2014 if (ret != 6) {
2015 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
2016 }
2017
2018 lock ("tile");
2019 a = now ();
2020 tile = rendertile (page, x, y, w, h, data);
2021 b = now ();
2022 unlock ("tile");
2023
2024 printd ("tile %d %d %" FMT_ptr " %u %f",
2025 x, y,
2026 FMT_ptr_cast2 (tile),
2027 tile->w * tile->h * tile->pixmap->n,
2028 b - a);
2029 }
2030 else if (!strncmp ("settrim", p, 7)) {
2031 fz_irect fuzz;
2032 int trimmargins;
2033
2034 ret = sscanf (p + 7, " %d %d %d %d %d",
2035 &trimmargins, &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
2036 if (ret != 5) {
2037 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
2038 }
2039 printd ("clear");
2040 lock ("settrim");
2041 state.trimmargins = trimmargins;
2042 state.needoutline = 1;
2043 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
2044 state.trimanew = 1;
2045 state.trimfuzz = fuzz;
2046 }
2047 state.pagedimcount = 0;
2048 free (state.pagedims);
2049 state.pagedims = NULL;
2050 initpdims ();
2051 layout ();
2052 process_outline ();
2053 unlock ("settrim");
2054 printd ("continue %d", state.pagecount);
2055 }
2056 else if (!strncmp ("sliceh", p, 6)) {
2057 int h;
2058
2059 ret = sscanf (p + 6, " %d", &h);
2060 if (ret != 1) {
2061 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
2062 }
2063 if (h != state.sliceheight) {
2064 int i;
2065
2066 state.sliceheight = h;
2067 for (i = 0; i < state.texcount; ++i) {
2068 state.texowners[i].w = -1;
2069 state.texowners[i].h = -1;
2070 state.texowners[i].slice = NULL;
2071 }
2072 }
2073 }
2074 else if (!strncmp ("interrupt", p, 9)) {
2075 printd ("vmsg interrupted");
2076 }
2077 else {
2078 errx (1, "unknown command %.*s", len, p);
2079 }
2080 }
2081 return 0;
2082 }
2083
2084 CAMLprim value ml_realloctexts (value texcount_v)
2085 {
2086 CAMLparam1 (texcount_v);
2087 int ok;
2088
2089 if (trylock ("ml_realloctexts")) {
2090 ok = 0;
2091 goto done;
2092 }
2093 realloctexts (Int_val (texcount_v));
2094 ok = 1;
2095 unlock ("ml_realloctexts");
2096
2097 done:
2098 CAMLreturn (Val_bool (ok));
2099 }
2100
2101 static void recti (int x0, int y0, int x1, int y1)
2102 {
2103 GLfloat *v = state.vertices;
2104
2105 glVertexPointer (2, GL_FLOAT, 0, v);
2106 v[0] = x0; v[1] = y0;
2107 v[2] = x1; v[3] = y0;
2108 v[4] = x0; v[5] = y1;
2109 v[6] = x1; v[7] = y1;
2110 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2111 }
2112
2113 static void showsel (struct page *page, int ox, int oy)
2114 {
2115 int seen = 0;
2116 fz_irect bbox;
2117 fz_rect rect;
2118 fz_text_line *line;
2119 fz_page_block *pageb;
2120 fz_text_block *block;
2121 struct mark first, last;
2122
2123 first = page->fmark;
2124 last = page->lmark;
2125
2126 if (!first.span || !last.span) return;
2127
2128 glEnable (GL_BLEND);
2129 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
2130 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
2131
2132 ox += state.pagedims[page->pdimno].bounds.x0;
2133 oy += state.pagedims[page->pdimno].bounds.y0;
2134 for (pageb = page->text->blocks;
2135 pageb < page->text->blocks + page->text->len;
2136 ++pageb) {
2137 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
2138 block = pageb->u.text;
2139
2140 for (line = block->lines;
2141 line < block->lines + block->len;
2142 ++line) {
2143 fz_text_span *span;
2144 rect = fz_empty_rect;
2145
2146 for (span = line->first_span; span; span = span->next) {
2147 int i, j, k;
2148 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
2149
2150 j = 0;
2151 k = span->len - 1;
2152
2153 if (span == page->fmark.span && span == page->lmark.span) {
2154 seen = 1;
2155 j = MIN (first.i, last.i);
2156 k = MAX (first.i, last.i);
2157 }
2158 else {
2159 if (span == first.span) {
2160 seen = 1;
2161 j = first.i;
2162 }
2163 else if (span == last.span) {
2164 seen = 1;
2165 k = last.i;
2166 }
2167 }
2168
2169 if (seen) {
2170 for (i = j; i <= k; ++i) {
2171 fz_rect bbox;
2172 fz_union_rect (&rect,
2173 fz_text_char_bbox (&bbox, span, i));
2174 }
2175 fz_round_rect (&bbox, &rect);
2176 lprintf ("%d %d %d %d oy=%d ox=%d\n",
2177 bbox.x0,
2178 bbox.y0,
2179 bbox.x1,
2180 bbox.y1,
2181 oy, ox);
2182
2183 recti (bbox.x0 + ox, bbox.y0 + oy,
2184 bbox.x1 + ox, bbox.y1 + oy);
2185 if (span == last.span) {
2186 goto done;
2187 }
2188 rect = fz_empty_rect;
2189 }
2190 }
2191 }
2192 }
2193 done:
2194 glDisable (GL_BLEND);
2195 }
2196
2197 #include "glfont.c"
2198
2199 static void highlightlinks (struct page *page, int xoff, int yoff)
2200 {
2201 fz_matrix ctm, tm, pm;
2202 fz_link *link, *links;
2203 GLfloat *texcoords = state.texcoords;
2204 GLfloat *vertices = state.vertices;
2205
2206 switch (page->type) {
2207 case DPDF:
2208 links = page->u.pdfpage->links;
2209 break;
2210
2211 case DXPS:
2212 links = page->u.xpspage->links;
2213 break;
2214
2215 default:
2216 return;
2217 }
2218
2219 glEnable (GL_TEXTURE_1D);
2220 glEnable (GL_BLEND);
2221 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2222 glBindTexture (GL_TEXTURE_1D, state.stid);
2223
2224 xoff -= state.pagedims[page->pdimno].bounds.x0;
2225 yoff -= state.pagedims[page->pdimno].bounds.y0;
2226 fz_translate (&tm, xoff, yoff);
2227 pm = pagectm (page);
2228 fz_concat (&ctm, &pm, &tm);
2229
2230 glTexCoordPointer (1, GL_FLOAT, 0, texcoords);
2231 glVertexPointer (2, GL_FLOAT, 0, vertices);
2232
2233 for (link = links; link; link = link->next) {
2234 fz_point p1, p2, p3, p4;
2235
2236 p1.x = link->rect.x0;
2237 p1.y = link->rect.y0;
2238
2239 p2.x = link->rect.x1;
2240 p2.y = link->rect.y0;
2241
2242 p3.x = link->rect.x1;
2243 p3.y = link->rect.y1;
2244
2245 p4.x = link->rect.x0;
2246 p4.y = link->rect.y1;
2247
2248 fz_transform_point (&p1, &ctm);
2249 fz_transform_point (&p2, &ctm);
2250 fz_transform_point (&p3, &ctm);
2251 fz_transform_point (&p4, &ctm);
2252
2253 switch (link->dest.kind) {
2254 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
2255 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
2256 case FZ_LINK_LAUNCH: glColor3ub (0, 255, 0); break;
2257 default: glColor3ub (0, 0, 0); break;
2258 }
2259
2260 {
2261 float w, h, s, t;
2262
2263 w = p2.x - p1.x;
2264 h = p2.y - p1.y;
2265 t = sqrtf (w*w + h*h) * .25f;
2266
2267 w = p3.x - p2.x;
2268 h = p3.y - p2.y;
2269 s = sqrtf (w*w + h*h) * .25f;
2270
2271 texcoords[0] = 0; vertices[0] = p1.x; vertices[1] = p1.y;
2272 texcoords[1] = t; vertices[2] = p2.x; vertices[3] = p2.y;
2273
2274 texcoords[2] = 0; vertices[4] = p2.x; vertices[5] = p2.y;
2275 texcoords[3] = s; vertices[6] = p3.x; vertices[7] = p3.y;
2276
2277 texcoords[4] = 0; vertices[8] = p3.x; vertices[9] = p3.y;
2278 texcoords[5] = t; vertices[10] = p4.x; vertices[11] = p4.y;
2279
2280 texcoords[6] = 0; vertices[12] = p4.x; vertices[13] = p4.y;
2281 texcoords[7] = s; vertices[14] = p1.x; vertices[15] = p1.y;
2282 }
2283 glDrawArrays (GL_LINES, 0, 8);
2284 }
2285
2286 glDisable (GL_BLEND);
2287 glDisable (GL_TEXTURE_1D);
2288 }
2289
2290 static int compareslinks (const void *l, const void *r)
2291 {
2292 struct slink const *ls = l;
2293 struct slink const *rs = r;
2294 if (ls->bbox.y0 == rs->bbox.y0) {
2295 return rs->bbox.x0 - rs->bbox.x0;
2296 }
2297 return ls->bbox.y0 - rs->bbox.y0;
2298 }
2299
2300 static void droptext (struct page *page)
2301 {
2302 if (page->text) {
2303 fz_free_text_page (state.ctx, page->text);
2304 page->fmark.i = -1;
2305 page->lmark.i = -1;
2306 page->fmark.span = NULL;
2307 page->lmark.span = NULL;
2308 page->text = NULL;
2309 }
2310 if (page->sheet) {
2311 fz_free_text_sheet (state.ctx, page->sheet);
2312 page->sheet = NULL;
2313 }
2314 }
2315
2316 static void dropslinks (struct page *page)
2317 {
2318 if (page->slinks) {
2319 free (page->slinks);
2320 page->slinks = NULL;
2321 page->slinkcount = 0;
2322 }
2323 }
2324
2325 static void ensureslinks (struct page *page)
2326 {
2327 fz_matrix ctm;
2328 int i, count = 0;
2329 size_t slinksize = sizeof (*page->slinks);
2330 fz_link *link, *links;
2331
2332 if (state.gen != page->sgen) {
2333 dropslinks (page);
2334 page->sgen = state.gen;
2335 }
2336 if (page->slinks) return;
2337
2338 switch (page->type) {
2339 case DPDF:
2340 links = page->u.pdfpage->links;
2341 trimctm (page->u.pdfpage, page->pdimno);
2342 fz_concat (&ctm,
2343 &state.pagedims[page->pdimno].tctm,
2344 &state.pagedims[page->pdimno].ctm);
2345 break;
2346
2347 case DXPS:
2348 links = page->u.xpspage->links;
2349 ctm = state.pagedims[page->pdimno].ctm;
2350 break;
2351
2352 default:
2353 return;
2354 }
2355
2356 for (link = links; link; link = link->next) {
2357 count++;
2358 }
2359 if (count > 0) {
2360 page->slinkcount = count;
2361 page->slinks = calloc (count, slinksize);
2362 if (!page->slinks) {
2363 err (1, "realloc slinks %d", count);
2364 }
2365
2366 for (i = 0, link = links; link; ++i, link = link->next) {
2367 fz_rect rect;
2368
2369 rect = link->rect;
2370 fz_transform_rect (&rect, &ctm);
2371 page->slinks[i].link = link;
2372 fz_round_rect (&page->slinks[i].bbox, &rect);
2373 }
2374 qsort (page->slinks, count, slinksize, compareslinks);
2375 }
2376 }
2377
2378 /* slightly tweaked fmt_ulong by D.J. Bernstein */
2379 static void fmt_linkn (char *s, unsigned int u)
2380 {
2381 unsigned int len; unsigned int q;
2382 int zma = 'z' - 'a' + 1;
2383 len = 1; q = u;
2384 while (q > zma - 1) { ++len; q /= zma; }
2385 if (s) {
2386 s += len;
2387 do { *--s = 'a' + (u % zma) - (u < zma && len > 1); u /= zma; } while(u);
2388 /* handles u == 0 */
2389 }
2390 s[len] = 0;
2391 }
2392
2393 static void highlightslinks (struct page *page, int xoff, int yoff,
2394 int noff, char *targ, int tlen, int hfsize)
2395 {
2396 int i;
2397 char buf[40];
2398 struct slink *slink;
2399 double x0, y0, x1, y1, w;
2400
2401 ensureslinks (page);
2402 glColor3ub (0xc3, 0xb0, 0x91);
2403 for (i = 0; i < page->slinkcount; ++i) {
2404 fmt_linkn (buf, i + noff);
2405 if (!tlen || !strncmp (targ, buf, tlen)) {
2406 slink = &page->slinks[i];
2407
2408 x0 = slink->bbox.x0 + xoff - 5;
2409 y1 = slink->bbox.y0 + yoff - 5;
2410 y0 = y1 + 10 + hfsize;
2411 w = measure_string (state.face, hfsize, buf);
2412 x1 = x0 + w + 10;
2413 recti (x0, y0, x1, y1);
2414 }
2415 }
2416
2417 glEnable (GL_BLEND);
2418 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2419 glEnable (GL_TEXTURE_2D);
2420 glColor3ub (0, 0, 0);
2421 for (i = 0; i < page->slinkcount; ++i) {
2422 fmt_linkn (buf, i + noff);
2423 if (!tlen || !strncmp (targ, buf, tlen)) {
2424 slink = &page->slinks[i];
2425
2426 x0 = slink->bbox.x0 + xoff;
2427 y0 = slink->bbox.y0 + yoff + hfsize;
2428 draw_string (state.face, hfsize, x0, y0, buf);
2429 }
2430 }
2431 glDisable (GL_TEXTURE_2D);
2432 glDisable (GL_BLEND);
2433 }
2434
2435
2436 static void uploadslice (struct tile *tile, struct slice *slice)
2437 {
2438 int offset;
2439 struct slice *slice1;
2440 unsigned char *texdata;
2441
2442 offset = 0;
2443 for (slice1 = tile->slices; slice != slice1; slice1++) {
2444 offset += slice1->h * tile->w * tile->pixmap->n;
2445 }
2446 if (slice->texindex != -1 && slice->texindex < state.texcount
2447 && state.texowners[slice->texindex].slice == slice) {
2448 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
2449 }
2450 else {
2451 int subimage = 0;
2452 int texindex = state.texindex++ % state.texcount;
2453
2454 if (state.texowners[texindex].w == tile->w) {
2455 if (state.texowners[texindex].h >= slice->h) {
2456 subimage = 1;
2457 }
2458 else {
2459 state.texowners[texindex].h = slice->h;
2460 }
2461 }
2462 else {
2463 state.texowners[texindex].h = slice->h;
2464 }
2465
2466 state.texowners[texindex].w = tile->w;
2467 state.texowners[texindex].slice = slice;
2468 slice->texindex = texindex;
2469
2470 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
2471 if (tile->pbo) {
2472 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
2473 texdata = 0;
2474 }
2475 else {
2476 texdata = tile->pixmap->samples;
2477 }
2478 if (subimage) {
2479 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
2480 0,
2481 0,
2482 0,
2483 tile->w,
2484 slice->h,
2485 state.texform,
2486 state.texty,
2487 texdata+offset
2488 );
2489 }
2490 else {
2491 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
2492 0,
2493 state.texiform,
2494 tile->w,
2495 slice->h,
2496 0,
2497 state.texform,
2498 state.texty,
2499 texdata+offset
2500 );
2501 }
2502 if (tile->pbo) {
2503 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
2504 }
2505 }
2506 }
2507
2508 CAMLprim value ml_begintiles (value unit_v)
2509 {
2510 CAMLparam1 (unit_v);
2511 glEnable (GL_TEXTURE_RECTANGLE_ARB);
2512 glTexCoordPointer (2, GL_FLOAT, 0, state.texcoords);
2513 glVertexPointer (2, GL_FLOAT, 0, state.vertices);
2514 CAMLreturn (unit_v);
2515 }
2516
2517 CAMLprim value ml_endtiles (value unit_v)
2518 {
2519 CAMLparam1 (unit_v);
2520 glDisable (GL_TEXTURE_RECTANGLE_ARB);
2521 CAMLreturn (unit_v);
2522 }
2523
2524 CAMLprim value ml_drawtile (value args_v, value ptr_v)
2525 {
2526 CAMLparam2 (args_v, ptr_v);
2527 int dispx = Int_val (Field (args_v, 0));
2528 int dispy = Int_val (Field (args_v, 1));
2529 int dispw = Int_val (Field (args_v, 2));
2530 int disph = Int_val (Field (args_v, 3));
2531 int tilex = Int_val (Field (args_v, 4));
2532 int tiley = Int_val (Field (args_v, 5));
2533 char *s = String_val (ptr_v);
2534 struct tile *tile = parse_pointer ("ml_drawtile", s);
2535 int slicey, firstslice;
2536 struct slice *slice;
2537 GLfloat *texcoords = state.texcoords;
2538 GLfloat *vertices = state.vertices;
2539
2540 firstslice = tiley / tile->sliceheight;
2541 slice = &tile->slices[firstslice];
2542 slicey = tiley % tile->sliceheight;
2543
2544 while (disph > 0) {
2545 int dh;
2546
2547 dh = slice->h - slicey;
2548 dh = MIN (disph, dh);
2549 uploadslice (tile, slice);
2550
2551 texcoords[0] = tilex; texcoords[1] = slicey;
2552 texcoords[2] = tilex+dispw; texcoords[3] = slicey;
2553 texcoords[4] = tilex; texcoords[5] = slicey+dh;
2554 texcoords[6] = tilex+dispw; texcoords[7] = slicey+dh;
2555
2556 vertices[0] = dispx; vertices[1] = dispy;
2557 vertices[2] = dispx+dispw; vertices[3] = dispy;
2558 vertices[4] = dispx; vertices[5] = dispy+dh;
2559 vertices[6] = dispx+dispw; vertices[7] = dispy+dh;
2560
2561 glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
2562 dispy += dh;
2563 disph -= dh;
2564 slice++;
2565 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
2566 slicey = 0;
2567 }
2568 CAMLreturn (Val_unit);
2569 }
2570
2571 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
2572 value xoff_v, value yoff_v,
2573 value li_v)
2574 {
2575 CAMLparam5 (ptr_v, hlinks_v, xoff_v, yoff_v, li_v);
2576 int xoff = Int_val (xoff_v);
2577 int yoff = Int_val (yoff_v);
2578 int noff = Int_val (Field (li_v, 0));
2579 char *targ = String_val (Field (li_v, 1));
2580 int tlen = caml_string_length (Field (li_v, 1));
2581 int hfsize = Int_val (Field (li_v, 2));
2582 char *s = String_val (ptr_v);
2583 int hlmask = Int_val (hlinks_v);
2584 struct page *page = parse_pointer ("ml_postprocess", s);
2585
2586 if (!page->u.ptr) {
2587 /* deal with loadpage failed pages */
2588 goto done;
2589 }
2590
2591 if (hlmask & 1) highlightlinks (page, xoff, yoff);
2592 if (trylock ("ml_postprocess")) {
2593 noff = 0;
2594 goto done;
2595 }
2596 if (hlmask & 2) {
2597 highlightslinks (page, xoff, yoff, noff, targ, tlen, hfsize);
2598 noff = page->slinkcount;
2599 }
2600 if (page->tgen == state.gen) {
2601 showsel (page, xoff, yoff);
2602 }
2603 unlock ("ml_postprocess");
2604
2605 done:
2606 CAMLreturn (Val_int (noff));
2607 }
2608
2609 static fz_link *getlink (struct page *page, int x, int y)
2610 {
2611 fz_point p;
2612 fz_matrix ctm;
2613 const fz_matrix *tctm;
2614 fz_link *link, *links;
2615
2616 switch (page->type) {
2617 case DPDF:
2618 trimctm (page->u.pdfpage, page->pdimno);
2619 tctm = &state.pagedims[page->pdimno].tctm;
2620 links = page->u.pdfpage->links;
2621 break;
2622
2623 case DXPS:
2624 tctm = &fz_identity;
2625 links = page->u.xpspage->links;
2626 break;
2627
2628 default:
2629 return NULL;
2630 }
2631 p.x = x;
2632 p.y = y;
2633
2634 fz_concat (&ctm, tctm, &state.pagedims[page->pdimno].ctm);
2635 fz_invert_matrix (&ctm, &ctm);
2636 fz_transform_point (&p, &ctm);
2637
2638 for (link = links; link; link = link->next) {
2639 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
2640 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
2641 return link;
2642 }
2643 }
2644 }
2645 return NULL;
2646 }
2647
2648 static void ensuretext (struct page *page)
2649 {
2650 if (state.gen != page->tgen) {
2651 droptext (page);
2652 page->tgen = state.gen;
2653 }
2654 if (!page->text) {
2655 fz_matrix ctm;
2656 fz_device *tdev;
2657
2658 page->text = fz_new_text_page (state.ctx);
2659 page->sheet = fz_new_text_sheet (state.ctx);
2660 tdev = fz_new_text_device (state.ctx, page->sheet, page->text);
2661 ctm = pagectm (page);
2662 fz_begin_page (tdev, &fz_infinite_rect, &ctm);
2663 fz_run_display_list (page->dlist, tdev, &ctm, &fz_infinite_rect, NULL);
2664 qsort (page->text->blocks, page->text->len,
2665 sizeof (*page->text->blocks), compareblocks);
2666 fz_end_page (tdev);
2667 fz_free_device (tdev);
2668 }
2669 }
2670
2671 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
2672 {
2673 CAMLparam2 (start_page_v, dir_v);
2674 CAMLlocal1 (ret_v);
2675 int i, dir = Int_val (dir_v);
2676 int start_page = Int_val (start_page_v);
2677 int end_page = dir > 0 ? state.pagecount : -1;
2678
2679 ret_v = Val_int (0);
2680 if (!(state.type == DPDF || state.type == DXPS)) {
2681 goto done;
2682 }
2683
2684 lock ("ml_findpage_with_links");
2685 for (i = start_page + dir; i != end_page; i += dir) {
2686 int found;
2687
2688 switch (state.type) {
2689 case DPDF:
2690 {
2691 pdf_page *page = NULL;
2692
2693 fz_try (state.ctx) {
2694 page = pdf_load_page (state.u.pdf, i);
2695 found = !!page->links;
2696 }
2697 fz_catch (state.ctx) {
2698 found = 0;
2699 }
2700 if (page) {
2701 freepdfpage (page);
2702 }
2703 }
2704 break;
2705 case DXPS:
2706 {
2707 xps_page *page = xps_load_page (state.u.xps, i);
2708 found = !!page->links;
2709 freexpspage (page);
2710 }
2711 break;
2712
2713 default:
2714 ARSERT (0 && "invalid document type");
2715 }
2716
2717 if (found) {
2718 ret_v = caml_alloc_small (1, 1);
2719 Field (ret_v, 0) = Val_int (i);
2720 goto unlock;
2721 }
2722 }
2723 unlock:
2724 unlock ("ml_findpage_with_links");
2725
2726 done:
2727 CAMLreturn (ret_v);
2728 }
2729
2730 enum { dir_first, dir_last };
2731 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2732
2733 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2734 {
2735 CAMLparam2 (ptr_v, dir_v);
2736 CAMLlocal2 (ret_v, pos_v);
2737 struct page *page;
2738 int dirtag, i, slinkindex;
2739 struct slink *found = NULL ,*slink;
2740 char *s = String_val (ptr_v);
2741
2742 page = parse_pointer ("ml_findlink", s);
2743 ret_v = Val_int (0);
2744 if (trylock ("ml_findlink")) {
2745 goto done;
2746 }
2747
2748 ensureslinks (page);
2749
2750 if (Is_block (dir_v)) {
2751 dirtag = Tag_val (dir_v);
2752 switch (dirtag) {
2753 case dir_first_visible:
2754 {
2755 int x0, y0, dir, first_index, last_index;
2756
2757 pos_v = Field (dir_v, 0);
2758 x0 = Int_val (Field (pos_v, 0));
2759 y0 = Int_val (Field (pos_v, 1));
2760 dir = Int_val (Field (pos_v, 2));
2761
2762 if (dir >= 0) {
2763 dir = 1;
2764 first_index = 0;
2765 last_index = page->slinkcount;
2766 }
2767 else {
2768 first_index = page->slinkcount - 1;
2769 last_index = -1;
2770 }
2771
2772 for (i = first_index; i != last_index; i += dir) {
2773 slink = &page->slinks[i];
2774 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2775 found = slink;
2776 break;
2777 }
2778 }
2779 }
2780 break;
2781
2782 case dir_left:
2783 slinkindex = Int_val (Field (dir_v, 0));
2784 found = &page->slinks[slinkindex];
2785 for (i = slinkindex - 1; i >= 0; --i) {
2786 slink = &page->slinks[i];
2787 if (slink->bbox.x0 < found->bbox.x0) {
2788 found = slink;
2789 break;
2790 }
2791 }
2792 break;
2793
2794 case dir_right:
2795 slinkindex = Int_val (Field (dir_v, 0));
2796 found = &page->slinks[slinkindex];
2797 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2798 slink = &page->slinks[i];
2799 if (slink->bbox.x0 > found->bbox.x0) {
2800 found = slink;
2801 break;
2802 }
2803 }
2804 break;
2805
2806 case dir_down:
2807 slinkindex = Int_val (Field (dir_v, 0));
2808 found = &page->slinks[slinkindex];
2809 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2810 slink = &page->slinks[i];
2811 if (slink->bbox.y0 >= found->bbox.y0) {
2812 found = slink;
2813 break;
2814 }
2815 }
2816 break;
2817
2818 case dir_up:
2819 slinkindex = Int_val (Field (dir_v, 0));
2820 found = &page->slinks[slinkindex];
2821 for (i = slinkindex - 1; i >= 0; --i) {
2822 slink = &page->slinks[i];
2823 if (slink->bbox.y0 <= found->bbox.y0) {
2824 found = slink;
2825 break;
2826 }
2827 }
2828 break;
2829 }
2830 }
2831 else {
2832 dirtag = Int_val (dir_v);
2833 switch (dirtag) {
2834 case dir_first:
2835 found = page->slinks;
2836 break;
2837
2838 case dir_last:
2839 if (page->slinks) {
2840 found = page->slinks + (page->slinkcount - 1);
2841 }
2842 break;
2843 }
2844 }
2845 if (found) {
2846 ret_v = caml_alloc_small (2, 1);
2847 Field (ret_v, 0) = Val_int (found - page->slinks);
2848 }
2849
2850 unlock ("ml_findlink");
2851 done:
2852 CAMLreturn (ret_v);
2853 }
2854
2855 enum { uuri, ugoto, utext, uunexpected,
2856 ulaunch, unamed, uremote, uremotedest };
2857
2858 #define LINKTOVAL \
2859 { \
2860 int pageno; \
2861 \
2862 switch (link->dest.kind) { \
2863 case FZ_LINK_GOTO: \
2864 { \
2865 fz_point p; \
2866 \
2867 pageno = link->dest.ld.gotor.page; \
2868 p.x = 0; \
2869 p.y = 0; \
2870 \
2871 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2872 p.y = link->dest.ld.gotor.lt.y; \
2873 fz_transform_point (&p, &pdim->lctm); \
2874 } \
2875 tup_v = caml_alloc_tuple (2); \
2876 ret_v = caml_alloc_small (1, ugoto); \
2877 Field (tup_v, 0) = Val_int (pageno); \
2878 Field (tup_v, 1) = Val_int (p.y); \
2879 Field (ret_v, 0) = tup_v; \
2880 } \
2881 break; \
2882 \
2883 case FZ_LINK_URI: \
2884 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2885 ret_v = caml_alloc_small (1, uuri); \
2886 Field (ret_v, 0) = str_v; \
2887 break; \
2888 \
2889 case FZ_LINK_LAUNCH: \
2890 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2891 ret_v = caml_alloc_small (1, ulaunch); \
2892 Field (ret_v, 0) = str_v; \
2893 break; \
2894 \
2895 case FZ_LINK_NAMED: \
2896 str_v = caml_copy_string (link->dest.ld.named.named); \
2897 ret_v = caml_alloc_small (1, unamed); \
2898 Field (ret_v, 0) = str_v; \
2899 break; \
2900 \
2901 case FZ_LINK_GOTOR: \
2902 { \
2903 int rty; \
2904 \
2905 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2906 pageno = link->dest.ld.gotor.page; \
2907 if (pageno == -1) { \
2908 gr_v = caml_copy_string (link->dest.ld.gotor.dest); \
2909 rty = uremotedest; \
2910 } \
2911 else { \
2912 gr_v = Val_int (pageno); \
2913 rty = uremote; \
2914 } \
2915 tup_v = caml_alloc_tuple (2); \
2916 ret_v = caml_alloc_small (1, rty); \
2917 Field (tup_v, 0) = str_v; \
2918 Field (tup_v, 1) = gr_v; \
2919 Field (ret_v, 0) = tup_v; \
2920 } \
2921 break; \
2922 \
2923 default: \
2924 { \
2925 char buf[80]; \
2926 \
2927 snprintf (buf, sizeof (buf), \
2928 "unhandled link kind %d", link->dest.kind); \
2929 str_v = caml_copy_string (buf); \
2930 ret_v = caml_alloc_small (1, uunexpected); \
2931 Field (ret_v, 0) = str_v; \
2932 } \
2933 break; \
2934 } \
2935 }
2936
2937 CAMLprim value ml_getlink (value ptr_v, value n_v)
2938 {
2939 CAMLparam2 (ptr_v, n_v);
2940 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
2941 fz_link *link;
2942 struct page *page;
2943 struct pagedim *pdim;
2944 char *s = String_val (ptr_v);
2945
2946 ret_v = Val_int (0);
2947 if (trylock ("ml_getlink")) {
2948 goto done;
2949 }
2950
2951 page = parse_pointer ("ml_getlink", s);
2952 ensureslinks (page);
2953 pdim = &state.pagedims[page->pdimno];
2954 link = page->slinks[Int_val (n_v)].link;
2955 LINKTOVAL;
2956
2957 unlock ("ml_getlink");
2958 done:
2959 CAMLreturn (ret_v);
2960 }
2961
2962 CAMLprim value ml_getlinkcount (value ptr_v)
2963 {
2964 CAMLparam1 (ptr_v);
2965 struct page *page;
2966 char *s = String_val (ptr_v);
2967
2968 page = parse_pointer ("ml_getlinkcount", s);
2969 CAMLreturn (Val_int (page->slinkcount));
2970 }
2971
2972 CAMLprim value ml_getlinkrect (value ptr_v, value n_v)
2973 {
2974 CAMLparam2 (ptr_v, n_v);
2975 CAMLlocal1 (ret_v);
2976 struct page *page;
2977 struct slink *slink;
2978 char *s = String_val (ptr_v);
2979
2980 page = parse_pointer ("ml_getlinkrect", s);
2981 ret_v = caml_alloc_tuple (4);
2982 if (trylock ("ml_getlinkrect")) {
2983 Field (ret_v, 0) = Val_int (0);
2984 Field (ret_v, 1) = Val_int (0);
2985 Field (ret_v, 2) = Val_int (0);
2986 Field (ret_v, 3) = Val_int (0);
2987 goto done;
2988 }
2989 ensureslinks (page);
2990
2991 slink = &page->slinks[Int_val (n_v)];
2992 Field (ret_v, 0) = Val_int (slink->bbox.x0);
2993 Field (ret_v, 1) = Val_int (slink->bbox.y0);
2994 Field (ret_v, 2) = Val_int (slink->bbox.x1);
2995 Field (ret_v, 3) = Val_int (slink->bbox.y1);
2996 unlock ("ml_getlinkrect");
2997
2998 done:
2999 CAMLreturn (ret_v);
3000 }
3001
3002 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
3003 {
3004 CAMLparam3 (ptr_v, x_v, y_v);
3005 CAMLlocal4 (ret_v, tup_v, str_v, gr_v);
3006 fz_link *link;
3007 struct page *page;
3008 char *s = String_val (ptr_v);
3009 int x = Int_val (x_v), y = Int_val (y_v);
3010 struct pagedim *pdim;
3011
3012 ret_v = Val_int (0);
3013 if (trylock ("ml_whatsunder")) {
3014 goto done;
3015 }
3016
3017 page = parse_pointer ("ml_whatsunder", s);
3018 pdim = &state.pagedims[page->pdimno];
3019 x += pdim->bounds.x0;
3020 y += pdim->bounds.y0;
3021 link = getlink (page, x, y);
3022 if (link) {
3023 LINKTOVAL;
3024 }
3025 else {
3026 fz_rect *b;
3027 fz_page_block *pageb;
3028 fz_text_block *block;
3029
3030 ensuretext (page);
3031 for (pageb = page->text->blocks;
3032 pageb < page->text->blocks + page->text->len;
3033 ++pageb) {
3034 fz_text_line *line;
3035 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3036 block = pageb->u.text;
3037
3038 b = &block->bbox;
3039 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3040 continue;
3041
3042 for (line = block->lines;
3043 line < block->lines + block->len;
3044 ++line) {
3045 fz_text_span *span;
3046
3047 b = &line->bbox;
3048 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3049 continue;
3050
3051 for (span = line->first_span; span; span = span->next) {
3052 int charnum;
3053
3054 b = &span->bbox;
3055 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3056 continue;
3057
3058 for (charnum = 0; charnum < span->len; ++charnum) {
3059 fz_rect bbox;
3060 fz_text_char_bbox (&bbox, span, charnum);
3061 b = &bbox;
3062
3063 if (x >= b->x0 && x <= b->x1
3064 && y >= b->y0 && y <= b->y1) {
3065 fz_text_style *style = span->text->style;
3066 const char *n2 =
3067 style->font && style->font->name
3068 ? style->font->name
3069 : "Span has no font name"
3070 ;
3071 FT_FaceRec *face = style->font->ft_face;
3072 if (face && face->family_name) {
3073 char *s;
3074 char *n1 = face->family_name;
3075 size_t l1 = strlen (n1);
3076 size_t l2 = strlen (n2);
3077
3078 if (l1 != l2 || memcmp (n1, n2, l1)) {
3079 s = malloc (l1 + l2 + 2);
3080 if (s) {
3081 memcpy (s, n2, l2);
3082 s[l2] = '=';
3083 memcpy (s + l2 + 1, n1, l1 + 1);
3084 str_v = caml_copy_string (s);
3085 free (s);
3086 }
3087 }
3088 }
3089 if (str_v == 0) {
3090 str_v = caml_copy_string (n2);
3091 }
3092 ret_v = caml_alloc_small (1, utext);
3093 Field (ret_v, 0) = str_v;
3094 goto unlock;
3095 }
3096 }
3097 }
3098 }
3099 }
3100 }
3101 unlock:
3102 unlock ("ml_whatsunder");
3103
3104 done:
3105 CAMLreturn (ret_v);
3106 }
3107
3108 enum { mark_page, mark_block, mark_line, mark_word };
3109
3110 static int uninteresting (int c)
3111 {
3112 return c == ' ' || c == '\n' || c == '\t' || c == '\n' || c == '\r'
3113 || ispunct (c);
3114 }
3115
3116 CAMLprim value ml_clearmark (value ptr_v)
3117 {
3118 CAMLparam1 (ptr_v);
3119 char *s = String_val (ptr_v);
3120 struct page *page;
3121
3122 if (trylock ("ml_clearmark")) {
3123 goto done;
3124 }
3125
3126 page = parse_pointer ("ml_clearmark", s);
3127 page->fmark.span = NULL;
3128 page->lmark.span = NULL;
3129 page->fmark.i = 0;
3130 page->lmark.i = 0;
3131
3132 unlock ("ml_clearmark");
3133 done:
3134 CAMLreturn (Val_unit);
3135 }
3136
3137 CAMLprim value ml_markunder (value ptr_v, value x_v, value y_v, value mark_v)
3138 {
3139 CAMLparam4 (ptr_v, x_v, y_v, mark_v);
3140 CAMLlocal1 (ret_v);
3141 fz_rect *b;
3142 struct page *page;
3143 fz_text_line *line;
3144 fz_page_block *pageb;
3145 fz_text_block *block;
3146 struct pagedim *pdim;
3147 int mark = Int_val (mark_v);
3148 char *s = String_val (ptr_v);
3149 int x = Int_val (x_v), y = Int_val (y_v);
3150
3151 ret_v = Val_bool (0);
3152 if (trylock ("ml_markunder")) {
3153 goto done;
3154 }
3155
3156 page = parse_pointer ("ml_markunder", s);
3157 pdim = &state.pagedims[page->pdimno];
3158
3159 ensuretext (page);
3160
3161 if (mark == mark_page) {
3162 int i;
3163 fz_page_block *pb1 = NULL, *pb2 = NULL;
3164
3165 for (i = 0; i < page->text->len; ++i) {
3166 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3167 pb1 = &page->text->blocks[i];
3168 break;
3169 }
3170 }
3171 if (!pb1) goto unlock;
3172
3173 for (i = page->text->len - 1; i >= 0; --i) {
3174 if (page->text->blocks[i].type == FZ_PAGE_BLOCK_TEXT) {
3175 pb2 = &page->text->blocks[i];
3176 break;
3177 }
3178 }
3179 if (!pb2) goto unlock;
3180
3181 block = pb1->u.text;
3182
3183 page->fmark.i = 0;
3184 page->fmark.span = block->lines->first_span;
3185
3186 block = pb2->u.text;
3187 line = &block->lines[block->len - 1];
3188 page->lmark.i = line->last_span->len - 1;
3189 page->lmark.span = line->last_span;
3190 ret_v = Val_bool (1);
3191 goto unlock;
3192 }
3193
3194 x += pdim->bounds.x0;
3195 y += pdim->bounds.y0;
3196
3197 for (pageb = page->text->blocks;
3198 pageb < page->text->blocks + page->text->len;
3199 ++pageb) {
3200 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3201 block = pageb->u.text;
3202
3203 b = &block->bbox;
3204 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3205 continue;
3206
3207 if (mark == mark_block) {
3208 page->fmark.i = 0;
3209 page->fmark.span = block->lines->first_span;
3210
3211 line = &block->lines[block->len - 1];
3212 page->lmark.i = line->last_span->len - 1;
3213 page->lmark.span = line->last_span;
3214 ret_v = Val_bool (1);
3215 goto unlock;
3216 }
3217
3218 for (line = block->lines;
3219 line < block->lines + block->len;
3220 ++line) {
3221 fz_text_span *span;
3222
3223 b = &line->bbox;
3224 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3225 continue;
3226
3227 if (mark == mark_line) {
3228 page->fmark.i = 0;
3229 page->fmark.span = line->first_span;
3230
3231 page->lmark.i = line->last_span->len - 1;
3232 page->lmark.span = line->last_span;
3233 ret_v = Val_bool (1);
3234 goto unlock;
3235 }
3236
3237 for (span = line->first_span; span; span = span->next) {
3238 int charnum;
3239
3240 b = &span->bbox;
3241 if (!(x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1))
3242 continue;
3243
3244 for (charnum = 0; charnum < span->len; ++charnum) {
3245 fz_rect bbox;
3246 fz_text_char_bbox (&bbox, span, charnum);
3247 b = &bbox;
3248
3249 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1) {
3250 /* unicode ftw */
3251 int charnum2, charnum3 = -1, charnum4 = -1;
3252
3253 if (uninteresting (span->text[charnum].c)) goto unlock;
3254
3255 for (charnum2 = charnum; charnum2 >= 0; --charnum2) {
3256 if (uninteresting (span->text[charnum2].c)) {
3257 charnum3 = charnum2 + 1;
3258 break;
3259 }
3260 }
3261 if (charnum3 == -1) charnum3 = 0;
3262
3263 for (charnum2 = charnum + 1;
3264 charnum2 < span->len;
3265 ++charnum2) {
3266 if (uninteresting (span->text[charnum2].c)) break;
3267 charnum4 = charnum2;
3268 }
3269 if (charnum4 == -1) goto unlock;
3270
3271 page->fmark.i = charnum3;
3272 page->fmark.span = span;
3273
3274 page->lmark.i = charnum4;
3275 page->lmark.span = span;
3276 ret_v = Val_bool (1);
3277 goto unlock;
3278 }
3279 }
3280 }
3281 }
3282 }
3283 unlock:
3284 if (!Bool_val (ret_v)) {
3285 page->fmark.span = NULL;
3286 page->lmark.span = NULL;
3287 page->fmark.i = 0;
3288 page->lmark.i = 0;
3289 }
3290 unlock ("ml_markunder");
3291
3292 done:
3293 CAMLreturn (ret_v);
3294 }
3295
3296 CAMLprim value ml_rectofblock (value ptr_v, value x_v, value y_v)
3297 {
3298 CAMLparam3 (ptr_v, x_v, y_v);
3299 CAMLlocal2 (ret_v, res_v);
3300 fz_rect *b = NULL;
3301 struct page *page;
3302 fz_page_block *pageb;
3303 struct pagedim *pdim;
3304 char *s = String_val (ptr_v);
3305 int x = Int_val (x_v), y = Int_val (y_v);
3306
3307 ret_v = Val_int (0);
3308 if (trylock ("ml_rectofblock")) {
3309 goto done;
3310 }
3311
3312 page = parse_pointer ("ml_rectofblock", s);
3313 pdim = &state.pagedims[page->pdimno];
3314 x += pdim->bounds.x0;
3315 y += pdim->bounds.y0;
3316
3317 ensuretext (page);
3318
3319 for (pageb = page->text->blocks;
3320 pageb < page->text->blocks + page->text->len;
3321 ++pageb) {
3322 switch (pageb->type) {
3323 case FZ_PAGE_BLOCK_TEXT:
3324 b = &pageb->u.text->bbox;
3325 break;
3326
3327 case FZ_PAGE_BLOCK_IMAGE:
3328 b = &pageb->u.image->bbox;
3329 break;
3330
3331 default:
3332 continue;
3333 }
3334
3335 if (x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)
3336 break;
3337 b = NULL;
3338 }
3339 if (b) {
3340 res_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3341 ret_v = caml_alloc_small (1, 1);
3342 Store_double_field (res_v, 0, b->x0);
3343 Store_double_field (res_v, 1, b->x1);
3344 Store_double_field (res_v, 2, b->y0);
3345 Store_double_field (res_v, 3, b->y1);
3346 Field (ret_v, 0) = res_v;
3347 }
3348 unlock ("ml_rectofblock");
3349
3350 done:
3351 CAMLreturn (ret_v);
3352 }
3353
3354 CAMLprim value ml_seltext (value ptr_v, value rect_v)
3355 {
3356 CAMLparam2 (ptr_v, rect_v);
3357 fz_rect b;
3358 struct page *page;
3359 struct pagedim *pdim;
3360 char *s = String_val (ptr_v);
3361 int i, x0, x1, y0, y1, fi, li;
3362 fz_text_line *line;
3363 fz_page_block *pageb;
3364 fz_text_block *block;
3365 fz_text_span *span, *fspan, *lspan;
3366
3367 if (trylock ("ml_seltext")) {
3368 goto done;
3369 }
3370
3371 page = parse_pointer ("ml_seltext", s);
3372 ensuretext (page);
3373
3374 pdim = &state.pagedims[page->pdimno];
3375 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;
3376 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
3377 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
3378 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
3379
3380 if (y0 > y1) {
3381 int t = y0;
3382 y0 = y1;
3383 y1 = t;
3384 x0 = x1;
3385 x1 = t;
3386 }
3387
3388 if (0) {
3389 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3390 glColor3ub (128, 128, 128);
3391 recti (x0, y0, x1, y1);
3392 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3393 }
3394
3395 fi = page->fmark.i;
3396 fspan = page->fmark.span;
3397
3398 li = page->lmark.i;
3399 lspan = page->lmark.span;
3400
3401 for (pageb = page->text->blocks;
3402 pageb < page->text->blocks + page->text->len;
3403 ++pageb) {
3404 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3405 block = pageb->u.text;
3406 for (line = block->lines;
3407 line < block->lines + block->len;
3408 ++line) {
3409 fz_text_span *span;
3410
3411 for (span = line->first_span; span; span = span->next) {
3412 for (i = 0; i < span->len; ++i) {
3413 int selected = 0;
3414
3415 fz_text_char_bbox (&b, span, i);
3416
3417 if (x0 >= b.x0 && x0 <= b.x1
3418 && y0 >= b.y0 && y0 <= b.y1) {
3419 fspan = span;
3420 fi = i;
3421 selected = 1;
3422 }
3423 if (x1 >= b.x0 && x1 <= b.x1
3424 && y1 >= b.y0 && y1 <= b.y1) {
3425 lspan = span;
3426 li = i;
3427 selected = 1;
3428 }
3429 if (0 && selected) {
3430 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
3431 glColor3ub (128, 128, 128);
3432 recti (b.x0, b.y0, b.x1, b.y1);
3433 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
3434 }
3435 }
3436 }
3437 }
3438 }
3439 if (x1 < x0 && fspan == lspan) {
3440 i = fi;
3441 span = fspan;
3442
3443 fi = li;
3444 fspan = lspan;
3445
3446 li = i;
3447 lspan = span;
3448 }
3449
3450 page->fmark.i = fi;
3451 page->fmark.span = fspan;
3452
3453 page->lmark.i = li;
3454 page->lmark.span = lspan;
3455
3456 unlock ("ml_seltext");
3457
3458 done:
3459 CAMLreturn (Val_unit);
3460 }
3461
3462 static int UNUSED_ATTR pipespan (FILE *f, fz_text_span *span, int a, int b)
3463 {
3464 char buf[4];
3465 int i, len, ret;
3466
3467 for (i = a; i <= b; ++i) {
3468 len = fz_runetochar (buf, span->text[i].c);
3469 ret = fwrite (buf, len, 1, f);
3470
3471 if (ret != 1) {
3472 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
3473 len, ret, strerror (errno));
3474 return -1;
3475 }
3476 }
3477 return 0;
3478 }
3479
3480 #ifdef __CYGWIN__
3481 value ml_popen (value UNUSED_ATTR u1, value UNUSED_ATTR u2)
3482 {
3483 caml_failwith ("ml_popen not implemented under Cygwin");
3484 }
3485 #else
3486 CAMLprim value ml_popen (value command_v, value fds_v)
3487 {
3488 CAMLparam2 (command_v, fds_v);
3489 CAMLlocal2 (l_v, tup_v);
3490 int ret;
3491 char *msg = NULL;
3492 value earg_v = Nothing;
3493 posix_spawnattr_t attr;
3494 posix_spawn_file_actions_t fa;
3495 char *argv[] = { "/bin/sh", "-c", String_val (command_v), NULL };
3496
3497 if ((ret = posix_spawn_file_actions_init (&fa)) != 0) {
3498 unix_error (ret, "posix_spawn_file_actions_init", Nothing);
3499 }
3500
3501 if ((ret = posix_spawnattr_init (&attr)) != 0) {
3502 msg = "posix_spawnattr_init";
3503 goto fail1;
3504 }
3505
3506 #ifdef POSIX_SPAWN_USEVFORK
3507 if ((ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK)) != 0) {
3508 msg = "posix_spawnattr_setflags POSIX_SPAWN_USEVFORK";
3509 goto fail;
3510 }
3511 #endif
3512
3513 for (l_v = fds_v; l_v != Val_int (0); l_v = Field (l_v, 1)) {
3514 int fd1, fd2;
3515
3516 tup_v = Field (l_v, 0);
3517 fd1 = Int_val (Field (tup_v, 0));
3518 fd2 = Int_val (Field (tup_v, 1));
3519 if (fd2 < 0) {
3520 if ((ret = posix_spawn_file_actions_addclose (&fa, fd1)) != 0) {
3521 msg = "posix_spawn_file_actions_addclose";
3522 earg_v = tup_v;
3523 goto fail;
3524 }
3525 }
3526 else {
3527 if ((ret = posix_spawn_file_actions_adddup2 (&fa, fd1, fd2)) != 0) {
3528 msg = "posix_spawn_file_actions_adddup2";
3529 earg_v = tup_v;
3530 goto fail;
3531 }
3532 }
3533 }
3534
3535 if ((ret = posix_spawn (NULL, "/bin/sh", &fa, &attr, argv, environ))) {
3536 msg = "posix_spawn";
3537 goto fail;
3538 }
3539
3540 fail:
3541 if ((ret = posix_spawnattr_destroy (&attr)) != 0) {
3542 fprintf (stderr, "posix_spawnattr_destroy: %s\n", strerror (ret));
3543 }
3544
3545 fail1:
3546 if ((ret = posix_spawn_file_actions_destroy (&fa)) != 0) {
3547 fprintf (stderr, "posix_spawn_file_actions_destroy: %s\n",
3548 strerror (ret));
3549 }
3550
3551 if (msg)
3552 unix_error (ret, msg, earg_v);
3553
3554 CAMLreturn (Val_unit);
3555 }
3556 #endif
3557
3558 CAMLprim value ml_hassel (value ptr_v)
3559 {
3560 CAMLparam1 (ptr_v);
3561 CAMLlocal1 (ret_v);
3562 struct page *page;
3563 char *s = String_val (ptr_v);
3564
3565 ret_v = Val_bool (0);
3566 if (trylock ("ml_hassel")) {
3567 goto done;
3568 }
3569
3570 page = parse_pointer ("ml_hassel", s);
3571 ret_v = Val_bool (page->fmark.span && page->lmark.span);
3572 unlock ("ml_hassel");
3573 done:
3574 CAMLreturn (ret_v);
3575 }
3576
3577 CAMLprim value ml_copysel (value fd_v, value ptr_v)
3578 {
3579 CAMLparam2 (fd_v, ptr_v);
3580 FILE *f;
3581 int seen = 0;
3582 struct page *page;
3583 fz_text_line *line;
3584 fz_page_block *pageb;
3585 fz_text_block *block;
3586 int fd = Int_val (fd_v);
3587 char *s = String_val (ptr_v);
3588
3589 if (trylock ("ml_copysel")) {
3590 goto done;
3591 }
3592
3593 page = parse_pointer ("ml_copysel", s);
3594
3595 if (!page->fmark.span || !page->lmark.span) {
3596 fprintf (stderr, "nothing to copy on page %d\n", page->pageno);
3597 goto unlock;
3598 }
3599
3600 f = fdopen (fd, "w");
3601 if (!f) {
3602 fprintf (stderr, "failed to fdopen sel pipe (from fd %d): %s\n",
3603 fd, strerror (errno));
3604 f = stdout;
3605 }
3606
3607 for (pageb = page->text->blocks;
3608 pageb < page->text->blocks + page->text->len;
3609 ++pageb) {
3610 if (pageb->type != FZ_PAGE_BLOCK_TEXT) continue;
3611 block = pageb->u.text;
3612 for (line = block->lines;
3613 line < block->lines + block->len;
3614 ++line) {
3615 fz_text_span *span;
3616
3617 for (span = line->first_span; span; span = span->next) {
3618 int a, b;
3619
3620 seen |= span == page->fmark.span || span == page->lmark.span;
3621 a = span == page->fmark.span ? page->fmark.i : 0;
3622 b = span == page->lmark.span ? page->lmark.i : span->len - 1;
3623
3624 if (seen) {
3625 if (pipespan (f, span, a, b)) {
3626 goto close;
3627 }
3628 if (span == page->lmark.span) {
3629 goto close;
3630 }
3631 if (span == line->last_span) {
3632 if (putc ('\n', f) == EOF) {
3633 fprintf (stderr,
3634 "failed break line on sel pipe: %s\n",
3635 strerror (errno));
3636 goto close;
3637 }
3638 }
3639 }
3640 }
3641 }
3642 }
3643 close:
3644 if (f != stdout) {
3645 int ret = fclose (f);
3646 fd = -1;
3647 if (ret == -1) {
3648 if (errno != ECHILD) {
3649 fprintf (stderr, "failed to close sel pipe: %s\n",
3650 strerror (errno));
3651 }
3652 }
3653 }
3654 unlock:
3655 unlock ("ml_copysel");
3656
3657 done:
3658 if (fd >= 0) {
3659 if (close (fd)) {
3660 fprintf (stderr, "failed to close sel pipe: %s\n",
3661 strerror (errno));
3662 }
3663 }
3664 CAMLreturn (Val_unit);
3665 }
3666
3667 CAMLprim value ml_getpdimrect (value pagedimno_v)
3668 {
3669 CAMLparam1 (pagedimno_v);
3670 CAMLlocal1 (ret_v);
3671 int pagedimno = Int_val (pagedimno_v);
3672 fz_rect box;
3673
3674 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
3675 if (trylock ("ml_getpdimrect")) {
3676 box = fz_empty_rect;
3677 }
3678 else {
3679 box = state.pagedims[pagedimno].mediabox;
3680 unlock ("ml_getpdimrect");
3681 }
3682
3683 Store_double_field (ret_v, 0, box.x0);
3684 Store_double_field (ret_v, 1, box.x1);
3685 Store_double_field (ret_v, 2, box.y0);
3686 Store_double_field (ret_v, 3, box.y1);
3687
3688 CAMLreturn (ret_v);
3689 }
3690
3691 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v,
3692 value dw_v, value cols_v)
3693 {
3694 CAMLparam3 (winw_v, winh_v, dw_v);
3695 CAMLlocal1 (ret_v);
3696 int i;
3697 double zoom = -1.;
3698 double maxh = 0.0;
3699 struct pagedim *p;
3700 double winw = Int_val (winw_v);
3701 double winh = Int_val (winh_v);
3702 double dw = Int_val (dw_v);
3703 double cols = Int_val (cols_v);
3704 double pw = 1.0, ph = 1.0;
3705
3706 if (trylock ("ml_zoom_for_height")) {
3707 goto done;
3708 }
3709
3710 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
3711 double w = p->pagebox.x1 / cols;
3712 double h = p->pagebox.y1;
3713 if (h > maxh) {
3714 maxh = h;
3715 ph = h;
3716 if (state.fitmodel != FitProportional) pw = w;
3717 }
3718 if ((state.fitmodel == FitProportional) && w > pw) pw = w;
3719 }
3720
3721 zoom = (((winh / ph) * pw) + dw) / winw;
3722 unlock ("ml_zoom_for_height");
3723 done:
3724 ret_v = caml_copy_double (zoom);
3725 CAMLreturn (ret_v);
3726 }
3727
3728 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
3729 {
3730 CAMLparam4 (pt_v, x_v, y_v, string_v);
3731 CAMLlocal1 (ret_v);
3732 int pt = Int_val(pt_v);
3733 int x = Int_val (x_v);
3734 int y = Int_val (y_v);
3735 double w;
3736
3737 w = draw_string (state.face, pt, x, y, String_val (string_v));
3738 ret_v = caml_copy_double (w);
3739 CAMLreturn (ret_v);
3740 }
3741
3742 CAMLprim value ml_measure_string (value pt_v, value string_v)
3743 {
3744 CAMLparam2 (pt_v, string_v);
3745 CAMLlocal1 (ret_v);
3746 int pt = Int_val (pt_v);
3747 double w;
3748
3749 w = measure_string (state.face, pt, String_val (string_v));
3750 ret_v = caml_copy_double (w);
3751 CAMLreturn (ret_v);
3752 }
3753
3754 CAMLprim value ml_getpagebox (value opaque_v)
3755 {
3756 CAMLparam1 (opaque_v);
3757 CAMLlocal1 (ret_v);
3758 fz_rect rect;
3759 fz_irect bbox;
3760 fz_matrix ctm;
3761 fz_device *dev;
3762 char *s = String_val (opaque_v);
3763 struct page *page = parse_pointer ("ml_getpagebox", s);
3764
3765 ret_v = caml_alloc_tuple (4);
3766 dev = fz_new_bbox_device (state.ctx, &rect);
3767 dev->hints |= FZ_IGNORE_SHADE;
3768
3769 switch (page->type) {
3770 case DPDF:
3771 ctm = pagectm (page);
3772 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, &ctm, NULL);
3773 break;
3774
3775 case DXPS:
3776 ctm = pagectm (page);
3777 xps_run_page (state.u.xps, page->u.xpspage, dev, &ctm, NULL);
3778 break;
3779
3780 default:
3781 rect = fz_infinite_rect;
3782 break;
3783 }
3784
3785 fz_free_device (dev);
3786 fz_round_rect (&bbox, &rect);
3787 Field (ret_v, 0) = Val_int (bbox.x0);
3788 Field (ret_v, 1) = Val_int (bbox.y0);
3789 Field (ret_v, 2) = Val_int (bbox.x1);
3790 Field (ret_v, 3) = Val_int (bbox.y1);
3791
3792 CAMLreturn (ret_v);
3793 }
3794
3795 CAMLprim value ml_setaalevel (value level_v)
3796 {
3797 CAMLparam1 (level_v);
3798
3799 state.aalevel = Int_val (level_v);
3800 CAMLreturn (Val_unit);
3801 }
3802
3803 #undef pixel
3804 #include <X11/Xlib.h>
3805 #include <GL/glx.h>
3806
3807 static struct {
3808 Display *dpy;
3809 GLXContext ctx;
3810 GLXDrawable drawable;
3811 } glx;
3812
3813 #include "keysym2ucs.c"
3814
3815 CAMLprim value ml_keysymtoutf8 (value keysym_v)
3816 {
3817 CAMLparam1 (keysym_v);
3818 CAMLlocal1 (str_v);
3819 KeySym keysym = Int_val (keysym_v);
3820 Rune rune;
3821 int len;
3822 char buf[5];
3823
3824 rune = keysym2ucs (keysym);
3825 len = fz_runetochar (buf, rune);
3826 buf[len] = 0;
3827 str_v = caml_copy_string (buf);
3828 CAMLreturn (str_v);
3829 }
3830
3831 CAMLprim value ml_glx (value win_v)
3832 {
3833 CAMLparam1 (win_v);
3834 XVisualInfo *visual;
3835 int screen, wid = Int_val (win_v);
3836 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
3837
3838 glx.dpy = XOpenDisplay (NULL);
3839 if (!glx.dpy) {
3840 caml_failwith ("XOpenDisplay");
3841 }
3842
3843 screen = DefaultScreen (glx.dpy);
3844 visual = glXChooseVisual (glx.dpy, screen, attributes);
3845 if (!visual) {
3846 XCloseDisplay (glx.dpy);
3847 glx.dpy = NULL;
3848 caml_failwith ("glXChooseVisual");
3849 }
3850
3851 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
3852 XFree (visual);
3853 if (!glx.ctx) {
3854 XCloseDisplay (glx.dpy);
3855 glx.dpy = NULL;
3856 caml_failwith ("glXCreateContext");
3857 }
3858
3859 if (!glXMakeCurrent (glx.dpy, wid, glx.ctx)) {
3860 glXDestroyContext (glx.dpy, glx.ctx);
3861 XCloseDisplay (glx.dpy);
3862 glx.dpy = NULL;
3863 glx.ctx = NULL;
3864 caml_failwith ("glXMakeCurrent");
3865 }
3866 glx.drawable = wid;
3867 CAMLreturn (Val_unit);
3868 }
3869
3870 CAMLprim value ml_swapb (value unit_v)
3871 {
3872 CAMLparam1 (unit_v);
3873 glXSwapBuffers (glx.dpy, glx.drawable);
3874 CAMLreturn (Val_unit);
3875 }
3876
3877 CAMLprim value ml_glxsync (value unit_v)
3878 {
3879 CAMLparam1 (unit_v);
3880 if (glx.dpy && glx.ctx) {
3881 glXWaitX ();
3882 glXWaitGL ();
3883 }
3884 CAMLreturn (Val_unit);
3885 }
3886
3887 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
3888 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
3889
3890 CAMLprim value ml_platform (value unit_v)
3891 {
3892 CAMLparam1 (unit_v);
3893 int platid = piunknown;
3894
3895 #if defined __linux__
3896 platid = pilinux;
3897 #elif defined __CYGWIN__
3898 platid = picygwin;
3899 #elif defined __DragonFly__
3900 platid = pidragonflybsd;
3901 #elif defined __FreeBSD__
3902 platid = pifreebsd;
3903 #elif defined __OpenBSD__
3904 platid = piopenbsd;
3905 #elif defined __NetBSD__
3906 platid = pinetbsd;
3907 #elif defined __sun__
3908 platid = pisun;
3909 #elif defined __APPLE__
3910 platid = piosx;
3911 #endif
3912 CAMLreturn (Val_int (platid));
3913 }
3914
3915 CAMLprim value ml_cloexec (value fd_v)
3916 {
3917 CAMLparam1 (fd_v);
3918 int fd = Int_val (fd_v);
3919
3920 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
3921 uerror ("fcntl", Nothing);
3922 }
3923 CAMLreturn (Val_unit);
3924 }
3925
3926 CAMLprim value ml_getpbo (value w_v, value h_v, value cs_v)
3927 {
3928 CAMLparam2 (w_v, h_v);
3929 CAMLlocal1 (ret_v);
3930 struct pbo *pbo;
3931 int w = Int_val (w_v);
3932 int h = Int_val (h_v);
3933 int cs = Int_val (cs_v);
3934
3935 if (state.pbo_usable) {
3936 pbo = calloc (sizeof (*pbo), 1);
3937 if (!pbo) {
3938 err (1, "calloc pbo");
3939 }
3940
3941 switch (cs) {
3942 case 0:
3943 case 1:
3944 pbo->size = w*h*4;
3945 break;
3946 case 2:
3947 pbo->size = w*h*2;
3948 break;
3949 default:
3950 errx (1, "ml_getpbo: invalid colorspace %d", cs);
3951 }
3952
3953 state.glGenBuffersARB (1, &pbo->id);
3954 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->id);
3955 state.glBufferDataARB (GL_PIXEL_UNPACK_BUFFER_ARB, pbo->size,
3956 NULL, GL_STREAM_DRAW);
3957 pbo->ptr = state.glMapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB,
3958 GL_READ_WRITE);
3959 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
3960 if (!pbo->ptr) {
3961 fprintf (stderr, "glMapBufferARB failed: %#x\n", glGetError ());
3962 state.glDeleteBuffersARB (1, &pbo->id);
3963 free (pbo);
3964 ret_v = caml_copy_string ("0");
3965 }
3966 else {
3967 int res;
3968 char *s;
3969
3970 res = snprintf (NULL, 0, "%" FMT_ptr, pbo);
3971 if (res < 0) {
3972 err (1, "snprintf %" FMT_ptr " failed", pbo);
3973 }
3974 s = malloc (res+1);
3975 if (!s) {
3976 err (1, "malloc %d bytes failed", res+1);
3977 }
3978 res = sprintf (s, "%" FMT_ptr, pbo);
3979 if (res < 0) {
3980 err (1, "sprintf %" FMT_ptr " failed", pbo);
3981 }
3982 ret_v = caml_copy_string (s);
3983 free (s);
3984 }
3985 }
3986 else {
3987 ret_v = caml_copy_string ("0");
3988 }
3989 CAMLreturn (ret_v);
3990 }
3991
3992 CAMLprim value ml_freepbo (value s_v)
3993 {
3994 CAMLparam1 (s_v);
3995 char *s = String_val (s_v);
3996 struct tile *tile = parse_pointer ("ml_freepbo", s);
3997
3998 if (tile->pbo) {
3999 state.glDeleteBuffersARB (1, &tile->pbo->id);
4000 tile->pbo->id = -1;
4001 tile->pbo->ptr = NULL;
4002 tile->pbo->size = -1;
4003 }
4004 CAMLreturn (Val_unit);
4005 }
4006
4007 CAMLprim value ml_unmappbo (value s_v)
4008 {
4009 CAMLparam1 (s_v);
4010 char *s = String_val (s_v);
4011 struct tile *tile = parse_pointer ("ml_unmappbo", s);
4012
4013 if (tile->pbo) {
4014 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, tile->pbo->id);
4015 if (state.glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) == GL_FALSE) {
4016 errx (1, "glUnmapBufferARB failed: %#x\n", glGetError ());
4017 }
4018 tile->pbo->ptr = NULL;
4019 state.glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0);
4020 }
4021 CAMLreturn (Val_unit);
4022 }
4023
4024 static void setuppbo (void)
4025 {
4026 #define GGPA(n) (*(void (**) ()) &state.n = glXGetProcAddress ((GLubyte *) #n))
4027 state.pbo_usable = GGPA (glBindBufferARB)
4028 && GGPA (glUnmapBufferARB)
4029 && GGPA (glMapBufferARB)
4030 && GGPA (glBufferDataARB)
4031 && GGPA (glGenBuffersARB)
4032 && GGPA (glDeleteBuffersARB);
4033 #undef GGPA
4034 }
4035
4036 CAMLprim value ml_pbo_usable (value unit_v)
4037 {
4038 CAMLparam1 (unit_v);
4039 CAMLreturn (Val_bool (state.pbo_usable));
4040 }
4041
4042 CAMLprim value ml_unproject (value ptr_v, value x_v, value y_v)
4043 {
4044 CAMLparam3 (ptr_v, x_v, y_v);
4045 CAMLlocal2 (ret_v, tup_v);
4046 struct page *page;
4047 char *s = String_val (ptr_v);
4048 int x = Int_val (x_v), y = Int_val (y_v);
4049 struct pagedim *pdim;
4050 fz_point p;
4051 fz_matrix ctm;
4052
4053 page = parse_pointer ("ml_unproject", s);
4054 pdim = &state.pagedims[page->pdimno];
4055
4056 ret_v = Val_int (0);
4057 if (trylock ("ml_unproject")) {
4058 goto done;
4059 }
4060
4061 switch (page->type) {
4062 case DPDF:
4063 trimctm (page->u.pdfpage, page->pdimno);
4064 break;
4065
4066 default:
4067 break;
4068 }
4069 p.x = x + pdim->bounds.x0;
4070 p.y = y + pdim->bounds.y0;
4071
4072 fz_concat (&ctm, &pdim->tctm, &pdim->ctm);
4073 fz_invert_matrix (&ctm, &ctm);
4074 fz_transform_point (&p, &ctm);
4075
4076 tup_v = caml_alloc_tuple (2);
4077 ret_v = caml_alloc_small (1, 1);
4078 Field (tup_v, 0) = Val_int (p.x);
4079 Field (tup_v, 1) = Val_int (p.y);
4080 Field (ret_v, 0) = tup_v;
4081
4082 unlock ("ml_unproject");
4083 done:
4084 CAMLreturn (ret_v);
4085 }
4086
4087 static void makestippletex (void)
4088 {
4089 const char pixels[] = "\xff\xff\0\0";
4090 glGenTextures (1, &state.stid);
4091 glBindTexture (GL_TEXTURE_1D, state.stid);
4092 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
4093 glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
4094 glTexImage1D (
4095 GL_TEXTURE_1D,
4096 0,
4097 GL_ALPHA,
4098 4,
4099 0,
4100 GL_ALPHA,
4101 GL_UNSIGNED_BYTE,
4102 pixels
4103 );
4104 }
4105
4106 CAMLprim value ml_fz_version (value unit_v)
4107 {
4108 return caml_copy_string (FZ_VERSION);
4109 }
4110
4111 #ifdef USE_FONTCONFIG
4112 static struct {
4113 int inited;
4114 FcConfig *config;
4115 } fc;
4116
4117 static fz_font *fc_load_system_font_func (fz_context *ctx,
4118 const char *name,
4119 int bold,
4120 int italic,
4121 int needs_exact_metrics)
4122 {
4123 char *buf;
4124 size_t i,size;
4125 fz_font *font;
4126 FcChar8 *path;
4127 FcResult result;
4128 FcPattern *pat, *pat1;
4129
4130 lprintf ("looking up %s bold:%d italic:%d needs_exact_metrics:%d\n",
4131 name, bold, italic, needs_exact_metrics);
4132 if (!fc.inited) {
4133 fc.inited = 1;
4134 fc.config = FcInitLoadConfigAndFonts ();
4135 if (!fc.config) {
4136 lprintf ("FcInitLoadConfigAndFonts failed\n");
4137 return NULL;
4138 }
4139 }
4140 if (!fc.config) return NULL;
4141
4142 size = strlen (name);
4143 if (bold) size += sizeof (":bold") - 1;
4144 if (italic) size += sizeof (":italic") - 1;
4145 size += 1;
4146
4147 buf = malloc (size);
4148 if (!buf) {
4149 err (1, "malloc %zu failed", size);
4150 }
4151
4152 strcpy (buf, name);
4153 if (bold && italic) {
4154 strcat (buf, ":bold:italic");
4155 }
4156 else {
4157 if (bold) strcat (buf, ":bold");
4158 if (italic) strcat (buf, ":italic");
4159 }
4160 for (i = 0; i < size; ++i) {
4161 if (buf[i] == ',' || buf[i] == '-') buf[i] = ':';
4162 }
4163
4164 lprintf ("fcbuf=%s\n", buf);
4165 pat = FcNameParse ((FcChar8 *) buf);
4166 if (!pat) {
4167 printd ("emsg FcNameParse failed\n");
4168 free (buf);
4169 return NULL;
4170 }
4171
4172 if (!FcConfigSubstitute (fc.config, pat, FcMatchPattern)) {
4173 printd ("emsg FcConfigSubstitute failed\n");
4174 free (buf);
4175 return NULL;
4176 }
4177 FcDefaultSubstitute (pat);
4178
4179 pat1 = FcFontMatch (fc.config, pat, &result);
4180 if (!pat1) {
4181 printd ("emsg FcFontMatch failed\n");
4182 FcPatternDestroy (pat);
4183 free (buf);
4184 return NULL;
4185 }
4186
4187 if (FcPatternGetString (pat1, FC_FILE, 0, &path) != FcResultMatch) {
4188 printd ("emsg FcPatternGetString failed\n");
4189 FcPatternDestroy (pat);
4190 FcPatternDestroy (pat1);
4191 free (buf);
4192 return NULL;
4193 }
4194
4195 #if 0
4196 printd ("emsg name=%s path=%s\n", name, path);
4197 #endif
4198 font = fz_new_font_from_file (ctx, name, (char *) path, 0, 0);
4199 FcPatternDestroy (pat);
4200 FcPatternDestroy (pat1);
4201 free (buf);
4202 return font;
4203 }
4204 #endif
4205
4206 CAMLprim value ml_init (value pipe_v, value params_v)
4207 {
4208 CAMLparam2 (pipe_v, params_v);
4209 CAMLlocal2 (trim_v, fuzz_v);
4210 int ret;
4211 int texcount;
4212 char *fontpath;
4213 int colorspace;
4214 int mustoresize;
4215 int haspboext;
4216 struct sigaction sa;
4217
4218 state.cr = Int_val (Field (pipe_v, 0));
4219 state.cw = Int_val (Field (pipe_v, 1));
4220 state.rotate = Int_val (Field (params_v, 0));
4221 state.fitmodel = Int_val (Field (params_v, 1));
4222 trim_v = Field (params_v, 2);
4223 texcount = Int_val (Field (params_v, 3));
4224 state.sliceheight = Int_val (Field (params_v, 4));
4225 mustoresize = Int_val (Field (params_v, 5));
4226 colorspace = Int_val (Field (params_v, 6));
4227 fontpath = String_val (Field (params_v, 7));
4228
4229 state.trimcachepath = strdup (String_val (Field (params_v, 8)));
4230 if (!state.trimcachepath) {
4231 fprintf (stderr, "failed to strdup trimcachepath: %s\n",
4232 strerror (errno));
4233 }
4234 haspboext = Bool_val (Field (params_v, 9));
4235
4236 state.ctx = fz_new_context (NULL, NULL, mustoresize);
4237
4238 #ifdef USE_FONTCONFIG
4239 fz_install_load_system_font_funcs (state.ctx, fc_load_system_font_func, NULL);
4240 #endif
4241
4242 state.trimmargins = Bool_val (Field (trim_v, 0));
4243 fuzz_v = Field (trim_v, 1);
4244 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
4245 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
4246 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
4247 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
4248
4249 set_tex_params (colorspace);
4250
4251 if (*fontpath) {
4252 state.face = load_font (fontpath);
4253 }
4254 else {
4255 unsigned int len;
4256 void *base = pdf_lookup_substitute_font (0, 0, 0, 0, &len);
4257
4258 state.face = load_builtin_font (base, len);
4259 }
4260 if (!state.face) _exit (1);
4261
4262 realloctexts (texcount);
4263
4264 if (haspboext) {
4265 setuppbo ();
4266 }
4267
4268 makestippletex ();
4269
4270 #ifdef __CYGWIN__
4271 sa.sa_handler = SIG_IGN;
4272 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
4273 #else
4274 sa.sa_handler = SIG_DFL;
4275 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
4276 #endif
4277 if (sigemptyset (&sa.sa_mask)) {
4278 err (1, "sigemptyset");
4279 }
4280 if (sigaction (SIGCHLD, &sa, NULL)) {
4281 err (1, "sigaction");
4282 }
4283
4284 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
4285 if (ret) {
4286 errx (1, "pthread_create: %s", strerror (ret));
4287 }
4288
4289 CAMLreturn (Val_unit);
4290 }
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