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Fix grave slinks related bug(s)
[llpp.git] / link.c
blob718ec5673f47abcdc04177b90833ed834a97ebfa
1 /* lots of code c&p-ed directly from mupdf */
2 #include <errno.h>
3 #include <stdio.h>
4 #include <ctype.h>
5 #include <string.h>
6 #include <stdlib.h>
7 #include <signal.h>
8
9 #include <unistd.h>
10 #include <pthread.h>
11 #include <sys/time.h>
12 #include <sys/types.h>
13 #include <sys/ioctl.h>
14
15 #include <regex.h>
16 #include <ctype.h>
17 #include <stdarg.h>
18 #include <limits.h>
19
20 #ifdef __APPLE__
21 #include <OpenGL/gl.h>
22 #else
23 #include <GL/gl.h>
24 #endif
25
26 #include <caml/fail.h>
27 #include <caml/alloc.h>
28 #include <caml/memory.h>
29 #include <caml/unixsupport.h>
30
31 #include <fitz.h>
32 #include <mupdf.h>
33 #include <muxps.h>
34 #include <mucbz.h>
35
36 #include FT_FREETYPE_H
37
38 #define PIGGYBACK
39
40 #if defined __GNUC__
41 #define NORETURN __attribute__ ((noreturn))
42 #define UNUSED __attribute__ ((unused))
43 #define OPTIMIZE(n) __attribute__ ((optimize ("O"#n)))
44 #define GCC_FMT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
45 #else
46 #define NORETURN
47 #define UNUSED
48 #define OPTIMIZE(n)
49 #define GCC_FMT_ATTR(a, b)
50 #endif
51
52 #define FMT_s "zu"
53
54 #define FMT_ptr "p"
55 #define FMT_ptr_cast(p) (p)
56 #define FMT_ptr_cast2(p) (p)
57
58 static void NORETURN GCC_FMT_ATTR (2, 3)
59 err (int exitcode, const char *fmt, ...)
60 {
61 va_list ap;
62 int savederrno;
63
64 savederrno = errno;
65 va_start (ap, fmt);
66 vfprintf (stderr, fmt, ap);
67 va_end (ap);
68 fprintf (stderr, ": %s\n", strerror (savederrno));
69 fflush (stderr);
70 _exit (exitcode);
71 }
72
73 static void NORETURN GCC_FMT_ATTR (2, 3)
74 errx (int exitcode, const char *fmt, ...)
75 {
76 va_list ap;
77
78 va_start (ap, fmt);
79 vfprintf (stderr, fmt, ap);
80 va_end (ap);
81 fputc ('\n', stderr);
82 fflush (stderr);
83 _exit (exitcode);
84 }
85
86 #ifndef GL_TEXTURE_RECTANGLE_ARB
87 #define GL_TEXTURE_RECTANGLE_ARB 0x84F5
88 #endif
89
90 #ifndef GL_BGRA
91 #define GL_BGRA 0x80E1
92 #endif
93
94 #ifndef GL_UNSIGNED_INT_8_8_8_8
95 #define GL_UNSIGNED_INT_8_8_8_8 0x8035
96 #endif
97
98 #ifndef GL_UNSIGNED_INT_8_8_8_8_REV
99 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
100 #endif
101
102 #if 0
103 #define lprintf printf
104 #else
105 #define lprintf(...)
106 #endif
107
108 #define ARSERT(cond) for (;;) { \
109 if (!(cond)) { \
110 errx (1, "%s:%d " #cond, __FILE__, __LINE__); \
111 } \
112 break; \
113 }
114
115 struct slice {
116 int h;
117 int texindex;
118 };
119
120 struct tile {
121 int x, y, w, h;
122 int slicecount;
123 int sliceheight;
124 fz_pixmap *pixmap;
125 struct slice slices[1];
126 };
127
128 struct pagedim {
129 int pageno;
130 int rotate;
131 int left;
132 int tctmready;
133 fz_bbox bounds;
134 fz_rect pagebox;
135 fz_rect mediabox;
136 fz_matrix ctm, zoomctm, lctm, tctm;
137 };
138
139 struct slink {
140 fz_bbox bbox;
141 fz_link *link;
142 };
143
144 enum { DPDF, DXPS, DCBZ };
145
146 struct page {
147 int gen;
148 int type;
149 int pageno;
150 int pdimno;
151 fz_text_span *text;
152 union {
153 void *ptr;
154 pdf_page *pdfpage;
155 xps_page *xpspage;
156 cbz_page *cbzpage;
157 } u;
158 fz_display_list *dlist;
159 int slinkcount;
160 struct slink *slinks;
161 struct mark {
162 int i;
163 fz_text_span *span;
164 } fmark, lmark;
165 void (*freepage) (void *);
166 };
167
168 struct {
169 int type;
170 int sliceheight;
171 struct pagedim *pagedims;
172 int pagecount;
173 int pagedimcount;
174 union {
175 pdf_document *pdf;
176 xps_document *xps;
177 cbz_document *cbz;
178 } u;
179 fz_context *ctx;
180 int w, h;
181
182 int texindex;
183 int texcount;
184 GLuint *texids;
185
186 GLenum texiform;
187 GLenum texform;
188 GLenum texty;
189
190 fz_colorspace *colorspace;
191
192 struct {
193 int w, h;
194 struct slice *slice;
195 } *texowners;
196
197 int rotate;
198 int proportional;
199 int trimmargins;
200 int needoutline;
201 int gen;
202 int aalevel;
203
204 int trimanew;
205 fz_bbox trimfuzz;
206 fz_pixmap *pig;
207
208 pthread_t thread;
209 int cr, cw;
210 FT_Face face;
211
212 void (*closedoc) (void);
213 void (*freepage) (void *);
214 } state;
215
216 static void UNUSED debug_rect (const char *cap, fz_rect r)
217 {
218 printf ("%s(rect) %.2f,%.2f,%.2f,%.2f\n", cap, r.x0, r.y0, r.x1, r.y1);
219 }
220
221 static void UNUSED debug_bbox (const char *cap, fz_bbox r)
222 {
223 printf ("%s(bbox) %d,%d,%d,%d\n", cap, r.x0, r.y0, r.x1, r.y1);
224 }
225
226 static void UNUSED debug_matrix (const char *cap, fz_matrix m)
227 {
228 printf ("%s(matrix) %.2f,%.2f,%.2f,%.2f %.2f %.2f\n", cap,
229 m.a, m.b, m.c, m.d, m.e, m.f);
230 }
231
232 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
233
234 static void lock (const char *cap)
235 {
236 int ret = pthread_mutex_lock (&mutex);
237 if (ret) {
238 errx (1, "%s: pthread_mutex_lock: %s", cap, strerror (ret));
239 }
240 }
241
242 static void unlock (const char *cap)
243 {
244 int ret = pthread_mutex_unlock (&mutex);
245 if (ret) {
246 errx (1, "%s: pthread_mutex_unlock: %s", cap, strerror (ret));
247 }
248 }
249
250 static int trylock (const char *cap)
251 {
252 int ret = pthread_mutex_trylock (&mutex);
253
254 if (ret && ret != EBUSY) {
255 errx (1, "%s: pthread_mutex_trylock: %s", cap, strerror (ret));
256 }
257 return ret == EBUSY;
258 }
259
260 static void *parse_pointer (const char *cap, const char *s)
261 {
262 int ret;
263 void *ptr;
264
265 ret = sscanf (s, "%" FMT_ptr, FMT_ptr_cast (&ptr));
266 if (ret != 1) {
267 errx (1, "%s: cannot parse pointer in `%s'", cap, s);
268 }
269 return ptr;
270 }
271
272 static double now (void)
273 {
274 struct timeval tv;
275
276 if (gettimeofday (&tv, NULL)) {
277 err (1, "gettimeofday");
278 }
279 return tv.tv_sec + tv.tv_usec*1e-6;
280 }
281
282 static int hasdata (void)
283 {
284 int ret, avail;
285 ret = ioctl (state.cr, FIONREAD, &avail);
286 if (ret) err (1, "hasdata: FIONREAD error ret=%d", ret);
287 return avail > 0;
288 }
289
290 CAMLprim value ml_hasdata (value fd_v)
291 {
292 CAMLparam1 (fd_v);
293 int ret, avail;
294
295 ret = ioctl (Int_val (fd_v), FIONREAD, &avail);
296 if (ret) uerror ("ioctl (FIONREAD)", Nothing);
297 CAMLreturn (Val_bool (avail > 0));
298 }
299
300 static void readdata (void *p, int size)
301 {
302 ssize_t n;
303
304 n = read (state.cr, p, size);
305 if (n - size) {
306 if (!n) errx (1, "EOF while reading");
307 err (1, "read (req %d, ret %zd)", size, n);
308 }
309 }
310
311 static void writedata (char *p, int size)
312 {
313 char buf[4];
314 ssize_t n;
315
316 buf[0] = (size >> 24) & 0xff;
317 buf[1] = (size >> 16) & 0xff;
318 buf[2] = (size >> 8) & 0xff;
319 buf[3] = (size >> 0) & 0xff;
320
321 n = write (state.cw, buf, 4);
322 if (n != 4) {
323 if (!n) errx (1, "EOF while writing length");
324 err (1, "write %zd", n);
325 }
326
327 n = write (state.cw, p, size);
328 if (n - size) {
329 if (!n) errx (1, "EOF while writing data");
330 err (1, "write (req %d, ret %zd)", size, n);
331 }
332 }
333
334 static int readlen (void)
335 {
336 unsigned char p[4];
337
338 readdata (p, 4);
339 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
340 }
341
342 static void GCC_FMT_ATTR (1, 2) printd (const char *fmt, ...)
343 {
344 int size = 200, len;
345 va_list ap;
346 char *buf;
347
348 buf = malloc (size);
349 for (;;) {
350 if (!buf) err (errno, "malloc for temp buf (%d bytes) failed", size);
351
352 va_start (ap, fmt);
353 len = vsnprintf (buf, size, fmt, ap);
354 va_end (ap);
355
356 if (len > -1 && len < size) {
357 writedata (buf, len);
358 break;
359 }
360
361 if (len > -1) {
362 size = len + 1;
363 }
364 else {
365 size *= 2;
366 }
367 buf = realloc (buf, size);
368 }
369 free (buf);
370 }
371
372 static void closepdf (void)
373 {
374 if (state.u.pdf) {
375 pdf_close_document (state.u.pdf);
376 state.u.pdf = NULL;
377 }
378 }
379
380 static void closexps (void)
381 {
382 if (state.u.xps) {
383 xps_close_document (state.u.xps);
384 state.u.xps = NULL;
385 }
386 }
387
388 static void closecbz (void)
389 {
390 if (state.u.cbz) {
391 cbz_close_document (state.u.cbz);
392 state.u.cbz = NULL;
393 }
394 }
395
396 static void freepdfpage (void *ptr)
397 {
398 pdf_free_page (state.u.pdf, ptr);
399 }
400
401 static void freexpspage (void *ptr)
402 {
403 xps_free_page (state.u.xps, ptr);
404 }
405
406 static void freecbzpage (void *ptr)
407 {
408 cbz_free_page (state.u.cbz, ptr);
409 }
410
411 static void openxref (char *filename, char *password)
412 {
413 int i, len;
414
415 for (i = 0; i < state.texcount; ++i) {
416 state.texowners[i].w = -1;
417 state.texowners[i].slice = NULL;
418 }
419
420 if (state.closedoc) state.closedoc ();
421
422 len = strlen (filename);
423
424 state.type = DPDF;
425 if (len > 4) {
426 char ext[4];
427
428 ext[0] = tolower (filename[len-3]);
429 ext[1] = tolower (filename[len-2]);
430 ext[2] = tolower (filename[len-1]);
431
432 /**/ if (ext[0] == 'x' && ext[1] == 'p' && ext[2] == 's') {
433 state.type = DXPS;
434 }
435 else if (ext[0] == 'c' && ext[1] == 'b' && ext[2] == 'z') {
436 state.type = DCBZ;
437 }
438 }
439
440 if (state.pagedims) {
441 free (state.pagedims);
442 state.pagedims = NULL;
443 }
444 state.pagedimcount = 0;
445
446 fz_set_aa_level (state.ctx, state.aalevel);
447 switch (state.type) {
448 case DPDF:
449 state.u.pdf = pdf_open_document (state.ctx, filename);
450 if (pdf_needs_password (state.u.pdf)) {
451 int okay = pdf_authenticate_password (state.u.pdf, password);
452 if (!okay) {
453 errx (1, "invalid password");
454 }
455 }
456 state.pagecount = pdf_count_pages (state.u.pdf);
457 state.closedoc = closepdf;
458 state.freepage = freepdfpage;
459 break;
460
461 case DXPS:
462 state.u.xps = xps_open_document (state.ctx, filename);
463 state.pagecount = xps_count_pages (state.u.xps);
464 state.closedoc = closexps;
465 state.freepage = freexpspage;
466 break;
467
468 case DCBZ:
469 state.u.cbz = cbz_open_document (state.ctx, filename);
470 state.pagecount = cbz_count_pages (state.u.cbz);
471 state.closedoc = closecbz;
472 state.freepage = freecbzpage;
473 break;
474 }
475 }
476
477 static void pdfinfo (void)
478 {
479 if (state.type == DPDF) {
480 pdf_obj *infoobj;
481
482 printd ("info PDF version\t%d.%d",
483 state.u.pdf->version / 10, state.u.pdf->version % 10);
484
485 infoobj = pdf_dict_gets (state.u.pdf->trailer, "Info");
486 if (infoobj) {
487 int i;
488 char *s;
489 char *items[] = { "Title", "Author", "Creator",
490 "Producer", "CreationDate" };
491
492 for (i = 0; i < sizeof (items) / sizeof (*items); ++i) {
493 pdf_obj *obj = pdf_dict_gets (infoobj, items[i]);
494 s = pdf_to_utf8 (state.ctx, obj);
495 if (*s) {
496 if (i == 0) {
497 printd ("title %s", s);
498 }
499 printd ("info %s\t%s", items[i], s);
500 }
501 fz_free (state.ctx, s);
502 }
503 }
504 printd ("infoend");
505 }
506 }
507
508 static void unlinktile (struct tile *tile)
509 {
510 int i;
511
512 for (i = 0; i < tile->slicecount; ++i) {
513 struct slice *s = &tile->slices[i];
514
515 if (s->texindex != -1) {
516 if (state.texowners[s->texindex].slice == s) {
517 state.texowners[s->texindex].slice = NULL;
518 }
519 }
520 }
521 }
522
523 static void freepage (struct page *page)
524 {
525 if (page->text) {
526 fz_free_text_span (state.ctx, page->text);
527 }
528 if (page->slinks) {
529 free (page->slinks);
530 }
531 page->freepage (page->u.ptr);
532 fz_free_display_list (state.ctx, page->dlist);
533 free (page);
534 }
535
536 static void freetile (struct tile *tile)
537 {
538 unlinktile (tile);
539 #ifndef PIGGYBACK
540 fz_drop_pixmap (state.ctx, tile->pixmap);
541 #else
542 if (state.pig) {
543 fz_drop_pixmap (state.ctx, state.pig);
544 }
545 state.pig = tile->pixmap;
546 #endif
547 free (tile);
548 }
549
550 #ifdef __ALTIVEC__
551 #include <altivec.h>
552
553 static int cacheline32bytes;
554 extern char **environ;
555
556 static void __attribute__ ((constructor)) clcheck (void)
557 {
558 char **envp = environ;
559 unsigned long *auxv;
560
561 while (*envp++);
562
563 for (auxv = (unsigned long *) envp; *auxv != 0; auxv += 2) {
564 if (*auxv == 19) {
565 cacheline32bytes = auxv[1] == 32;
566 return;
567 }
568 }
569 }
570
571 static void OPTIMIZE (3) clearpixmap (fz_pixmap *pixmap)
572 {
573 if (cacheline32bytes) {
574 intptr_t a1, a2, diff;
575 size_t sizea, i, size = pixmap->w * pixmap->h * pixmap->n;
576 vector unsigned char v = vec_splat_u8 (-1);
577 vector unsigned char *p;
578
579 a1 = a2 = (intptr_t) pixmap->samples;
580 a2 = (a1 + 31) & ~31;
581 diff = a2 - a1;
582 sizea = size - diff;
583 p = (void *) a2;
584
585 while (a1 != a2) *(char *) a1++ = 0xff;
586 for (i = 0; i < (sizea & ~31); i += 32) {
587 __asm volatile ("dcbz %0, %1"::"b"(a2),"r"(i));
588 vec_st (v, i, p);
589 vec_st (v, i + 16, p);
590 }
591 while (i < sizea) *((char *) a1 + i++) = 0xff;
592 }
593 else fz_clear_pixmap_with_value (state.ctx, pixmap, 0xff);
594 }
595 #else
596 #define clearpixmap(p) fz_clear_pixmap_with_value (state.ctx, p, 0xff)
597 #endif
598
599 static fz_matrix trimctm (pdf_page *page, int pindex)
600 {
601 fz_matrix ctm;
602 struct pagedim *pdim = &state.pagedims[pindex];
603
604 if (!pdim->tctmready) {
605 if (state.trimmargins) {
606 fz_rect realbox;
607
608 ctm = fz_concat (fz_rotate (-pdim->rotate), fz_scale (1, -1));
609 realbox = fz_transform_rect (ctm, pdim->mediabox);
610 ctm = fz_concat (ctm, fz_translate (-realbox.x0, -realbox.y0));
611 ctm = fz_concat (fz_invert_matrix (page->ctm), ctm);
612 }
613 else {
614 ctm = fz_identity;
615 }
616 pdim->tctm = ctm;
617 pdim->tctmready = 1;
618 }
619 return pdim->tctm;
620 }
621
622 static fz_matrix pagectm (struct page *page)
623 {
624 if (page->type == DPDF) {
625 return fz_concat (trimctm (page->u.pdfpage, page->pdimno),
626 state.pagedims[page->pdimno].ctm);
627 }
628 else {
629 fz_matrix ctm;
630 struct pagedim *pdim = &state.pagedims[page->pdimno];
631
632 ctm = state.pagedims[page->pdimno].ctm;
633 ctm = fz_concat (fz_translate (-pdim->mediabox.x0,
634 -pdim->mediabox.y0), ctm);
635 return ctm;
636 }
637 }
638
639 static void *loadpage (int pageno, int pindex)
640 {
641 fz_device *dev;
642 struct page *page = NULL;
643
644 page = calloc (sizeof (struct page), 1);
645 if (!page) {
646 err (1, "calloc page %d", pageno);
647 }
648
649 page->dlist = fz_new_display_list (state.ctx);
650 dev = fz_new_list_device (state.ctx, page->dlist);
651 switch (state.type) {
652 case DPDF:
653 page->u.pdfpage = pdf_load_page (state.u.pdf, pageno);
654 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, fz_identity, NULL);
655 page->freepage = freepdfpage;
656 break;
657
658 case DXPS:
659 page->u.xpspage = xps_load_page (state.u.xps, pageno);
660 xps_run_page (state.u.xps, page->u.xpspage, dev, fz_identity, NULL);
661 page->freepage = freexpspage;
662 break;
663
664 case DCBZ:
665 page->u.cbzpage = cbz_load_page (state.u.cbz, pageno);
666 cbz_run_page (state.u.cbz, page->u.cbzpage, dev, fz_identity, NULL);
667 page->freepage = freecbzpage;
668 break;
669 }
670 fz_free_device (dev);
671
672 page->pdimno = pindex;
673 page->pageno = pageno;
674 page->gen = state.gen;
675 page->type = state.type;
676
677 return page;
678 }
679
680 static struct tile *alloctile (int h)
681 {
682 int i;
683 int slicecount;
684 size_t tilesize;
685 struct tile *tile;
686
687 slicecount = (h + state.sliceheight - 1) / state.sliceheight;
688 tilesize = sizeof (*tile) + ((slicecount - 1) * sizeof (struct slice));
689 tile = calloc (tilesize, 1);
690 if (!tile) {
691 err (1, "can not allocate tile (%" FMT_s " bytes)", tilesize);
692 }
693 for (i = 0; i < slicecount; ++i) {
694 int sh = MIN (h, state.sliceheight);
695 tile->slices[i].h = sh;
696 tile->slices[i].texindex = -1;
697 h -= sh;
698 }
699 tile->slicecount = slicecount;
700 tile->sliceheight = state.sliceheight;
701 return tile;
702 }
703
704 static struct tile *rendertile (struct page *page, int x, int y, int w, int h)
705 {
706 fz_bbox bbox;
707 fz_device *dev;
708 struct tile *tile;
709 struct pagedim *pdim;
710
711 tile = alloctile (h);
712 pdim = &state.pagedims[page->pdimno];
713
714 bbox = pdim->bounds;
715 bbox.x0 += x;
716 bbox.y0 += y;
717 bbox.x1 = bbox.x0 + w;
718 bbox.y1 = bbox.y0 + h;
719
720 if (state.pig) {
721 if (state.pig->w == w
722 && state.pig->h == h
723 && state.pig->colorspace == state.colorspace) {
724 tile->pixmap = state.pig;
725 tile->pixmap->x = bbox.x0;
726 tile->pixmap->y = bbox.y0;
727 }
728 else {
729 fz_drop_pixmap (state.ctx, state.pig);
730 }
731 state.pig = NULL;
732 }
733 if (!tile->pixmap) {
734 tile->pixmap =
735 fz_new_pixmap_with_rect (state.ctx, state.colorspace, bbox);
736 }
737
738 tile->w = w;
739 tile->h = h;
740 clearpixmap (tile->pixmap);
741 dev = fz_new_draw_device (state.ctx, tile->pixmap);
742 fz_run_display_list (page->dlist, dev, pagectm (page), bbox, NULL);
743 fz_free_device (dev);
744
745 return tile;
746 }
747
748 static void initpdims (void)
749 {
750 int pageno;
751 double start, end;
752
753 start = now ();
754 for (pageno = 0; pageno < state.pagecount; ++pageno) {
755 int rotate;
756 struct pagedim *p;
757 fz_rect mediabox;
758
759 switch (state.type) {
760 case DPDF: {
761 pdf_obj *pageobj = state.u.pdf->page_objs[pageno];
762
763 if (state.trimmargins) {
764 pdf_obj *obj;
765 pdf_page *page;
766
767 page = pdf_load_page (state.u.pdf, pageno);
768 obj = pdf_dict_gets (pageobj, "llpp.TrimBox");
769 if (state.trimanew || !obj) {
770 fz_rect rect;
771 fz_bbox bbox;
772 fz_matrix ctm;
773 fz_device *dev;
774
775 dev = fz_new_bbox_device (state.ctx, &bbox);
776 dev->hints |= FZ_IGNORE_SHADE;
777 ctm = fz_invert_matrix (page->ctm);
778 pdf_run_page (state.u.pdf, page, dev, fz_identity, NULL);
779 fz_free_device (dev);
780
781 rect.x0 = bbox.x0 + state.trimfuzz.x0;
782 rect.x1 = bbox.x1 + state.trimfuzz.x1;
783 rect.y0 = bbox.y0 + state.trimfuzz.y0;
784 rect.y1 = bbox.y1 + state.trimfuzz.y1;
785 rect = fz_transform_rect (ctm, rect);
786 rect = fz_intersect_rect (rect, page->mediabox);
787
788 if (fz_is_empty_rect (rect)) {
789 mediabox = page->mediabox;
790 }
791 else {
792 mediabox = rect;
793 }
794
795 obj = pdf_new_array (state.ctx, 4);
796 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x0));
797 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y0));
798 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.x1));
799 pdf_array_push (obj, pdf_new_real (state.ctx, mediabox.y1));
800 pdf_dict_puts (pageobj, "llpp.TrimBox", obj);
801 }
802 else {
803 mediabox.x0 = pdf_to_real (pdf_array_get (obj, 0));
804 mediabox.y0 = pdf_to_real (pdf_array_get (obj, 1));
805 mediabox.x1 = pdf_to_real (pdf_array_get (obj, 2));
806 mediabox.y1 = pdf_to_real (pdf_array_get (obj, 3));
807 }
808
809 rotate = page->rotate;
810 pdf_free_page (state.u.pdf, page);
811
812 printd ("progress %f Trimming %d",
813 (double) (pageno + 1) / state.pagecount,
814 pageno + 1);
815 }
816 else {
817 fz_rect cropbox;
818
819 mediabox = pdf_to_rect (state.ctx,
820 pdf_dict_gets (pageobj, "MediaBox"));
821 if (fz_is_empty_rect (mediabox)) {
822 fprintf (stderr, "cannot find page size for page %d\n",
823 pageno+1);
824 mediabox.x0 = 0;
825 mediabox.y0 = 0;
826 mediabox.x1 = 612;
827 mediabox.y1 = 792;
828 }
829
830 cropbox = pdf_to_rect (state.ctx,
831 pdf_dict_gets (pageobj, "CropBox"));
832 if (!fz_is_empty_rect (cropbox)) {
833 mediabox = fz_intersect_rect (mediabox, cropbox);
834 }
835 rotate = pdf_to_int (pdf_dict_gets (pageobj, "Rotate"));
836 }
837 break;
838 }
839
840 case DXPS:
841 {
842 xps_page *page;
843
844 page = xps_load_page (state.u.xps, pageno);
845 mediabox = xps_bound_page (state.u.xps, page);
846 rotate = 0;
847 if (state.trimmargins) {
848 fz_rect rect;
849 fz_bbox bbox;
850 fz_device *dev;
851
852 dev = fz_new_bbox_device (state.ctx, &bbox);
853 dev->hints |= FZ_IGNORE_SHADE;
854 xps_run_page (state.u.xps, page, dev, fz_identity, NULL);
855 fz_free_device (dev);
856
857 rect.x0 = bbox.x0 + state.trimfuzz.x0;
858 rect.x1 = bbox.x1 + state.trimfuzz.x1;
859 rect.y0 = bbox.y0 + state.trimfuzz.y0;
860 rect.y1 = bbox.y1 + state.trimfuzz.y1;
861 rect = fz_intersect_rect (rect, mediabox);
862
863 if (!fz_is_empty_rect (rect)) {
864 mediabox = rect;
865 }
866 }
867 xps_free_page (state.u.xps, page);
868 printd ("progress %f loading %d",
869 (double) (pageno + 1) / state.pagecount,
870 pageno + 1);
871 }
872 break;
873
874 case DCBZ:
875 {
876 rotate = 0;
877 if (state.trimmargins) {
878 cbz_page *page;
879
880 page = cbz_load_page (state.u.cbz, pageno);
881 mediabox = cbz_bound_page (state.u.cbz, page);
882 cbz_free_page (state.u.cbz, page);
883 printd ("progress %f Trimming %d",
884 (double) (pageno + 1) / state.pagecount,
885 pageno + 1);
886 }
887 else {
888 mediabox.x0 = mediabox.y0 = 0;
889 mediabox.x1 = 900;
890 mediabox.y1 = 900;
891 }
892 }
893 break;
894
895 default:
896 ARSERT (0 && state.type);
897 }
898
899 if (state.pagedimcount == 0
900 || (p = &state.pagedims[state.pagedimcount-1], p->rotate != rotate)
901 || memcmp (&p->mediabox, &mediabox, sizeof (mediabox))) {
902 size_t size;
903
904 size = (state.pagedimcount + 1) * sizeof (*state.pagedims);
905 state.pagedims = realloc (state.pagedims, size);
906 if (!state.pagedims) {
907 err (1, "realloc pagedims to %" FMT_s " (%d elems)",
908 size, state.pagedimcount + 1);
909 }
910
911 p = &state.pagedims[state.pagedimcount++];
912 p->rotate = rotate;
913 p->mediabox = mediabox;
914 p->pageno = pageno;
915 }
916 }
917 end = now ();
918 if (state.trimmargins) {
919 printd ("progress 1 Trimmed %d pages in %f seconds",
920 state.pagecount, end - start);
921 }
922 else {
923 printd ("vmsg Processed %d pages in %f seconds",
924 state.pagecount, end - start);
925 }
926 state.trimanew = 0;
927 }
928
929 static void layout (void)
930 {
931 int pindex;
932 fz_rect box;
933 fz_matrix ctm;
934 double zoom, w, maxw = 0;
935 struct pagedim *p = state.pagedims;
936
937 if (state.proportional) {
938 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
939 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
940 p->mediabox);
941 w = box.x1 - box.x0;
942 maxw = MAX (w, maxw);
943 }
944 }
945
946 p = state.pagedims;
947 for (pindex = 0; pindex < state.pagedimcount; ++pindex, ++p) {
948 fz_bbox bbox;
949
950 ctm = fz_rotate (state.rotate);
951 box = fz_transform_rect (fz_rotate (p->rotate + state.rotate),
952 p->mediabox);
953 w = box.x1 - box.x0;
954
955 if (state.proportional) {
956 double scale = w / maxw;
957 zoom = (state.w / w) * scale;
958 }
959 else {
960 zoom = state.w / w;
961 }
962
963 p->zoomctm = fz_scale (zoom, zoom);
964 ctm = fz_concat (p->zoomctm, ctm);
965
966 p->pagebox = fz_transform_rect (fz_rotate (p->rotate), p->mediabox);
967 p->pagebox.x1 -= p->pagebox.x0;
968 p->pagebox.y1 -= p->pagebox.y0;
969 p->pagebox.x0 = 0;
970 p->pagebox.y0 = 0;
971 bbox = fz_round_rect (fz_transform_rect (ctm, p->pagebox));
972
973 p->bounds = bbox;
974 p->left = state.proportional ? ((maxw - w) * zoom) / 2.0 : 0;
975 p->ctm = ctm;
976
977 ctm = fz_identity;
978 ctm = fz_concat (ctm, fz_translate (0, -p->mediabox.y1));
979 ctm = fz_concat (ctm, fz_scale (zoom, -zoom));
980 ctm = fz_concat (ctm, fz_rotate (p->rotate + state.rotate));
981 p->lctm = ctm;
982
983 p->tctmready = 0;
984 }
985
986 while (p-- != state.pagedims) {
987 int x0 = MIN (p->bounds.x0, p->bounds.x1);
988 int y0 = MIN (p->bounds.y0, p->bounds.y1);
989 int x1 = MAX (p->bounds.x0, p->bounds.x1);
990 int y1 = MAX (p->bounds.y0, p->bounds.y1);
991 int w = x1 - x0;
992 int h = y1 - y0;
993
994 printd ("pdim %d %d %d %d", p->pageno, w, h, p->left);
995 }
996 }
997
998 static void recurse_outline (fz_outline *outline, int level)
999 {
1000 while (outline) {
1001 fz_link_dest *dest;
1002 int i, top = 0;
1003 struct pagedim *pdim = state.pagedims;
1004
1005 dest = &outline->dest;
1006 for (i = 0; i < state.pagedimcount; ++i) {
1007 if (state.pagedims[i].pageno > dest->ld.gotor.page)
1008 break;
1009 pdim = &state.pagedims[i];
1010 }
1011 if (dest->ld.gotor.flags & fz_link_flag_t_valid) {
1012 fz_point p;
1013 p.x = 0;
1014 p.y = dest->ld.gotor.lt.y;
1015 p = fz_transform_point (pdim->lctm, p);
1016 top = p.y;
1017 }
1018 if (dest->ld.gotor.page >= 0 && dest->ld.gotor.page < 1<<30) {
1019 int h;
1020 double y0, y1;
1021
1022 y0 = MIN (pdim->bounds.y0, pdim->bounds.y1);
1023 y1 = MAX (pdim->bounds.y0, pdim->bounds.y1);
1024 h = y1 - y0;
1025 printd ("o %d %d %d %d %s",
1026 level, dest->ld.gotor.page, top, h, outline->title);
1027 }
1028 if (outline->down) {
1029 recurse_outline (outline->down, level + 1);
1030 }
1031 outline = outline->next;
1032 }
1033 }
1034
1035 static void process_outline (void)
1036 {
1037 fz_outline *outline;
1038
1039 if (!state.needoutline) return;
1040
1041 state.needoutline = 0;
1042 switch (state.type) {
1043 case DPDF:
1044 outline = pdf_load_outline (state.u.pdf);
1045 break;
1046 case DXPS:
1047 outline = xps_load_outline (state.u.xps);
1048 break;
1049 default:
1050 outline = NULL;
1051 break;
1052 }
1053 if (outline) {
1054 recurse_outline (outline, 0);
1055 fz_free_outline (state.ctx, outline);
1056 }
1057 }
1058
1059 static int comparespans (const void *l, const void *r)
1060 {
1061 fz_text_span const *const*ls = l;
1062 fz_text_span const *const*rs = r;
1063 return (*ls)->text->bbox.y0 - (*rs)->text->bbox.y0;
1064 }
1065
1066 /* wishful thinking function */
1067 static void search (regex_t *re, int pageno, int y, int forward)
1068 {
1069 int i, j;
1070 int ret;
1071 char *p;
1072 char buf[256];
1073 fz_matrix ctm;
1074 fz_device *tdev;
1075 union { void *ptr; pdf_page *pdfpage; xps_page *xpspage; } u;
1076 fz_text_span *text, *span, **pspan;
1077 struct pagedim *pdim, *pdimprev;
1078 int stop = 0;
1079 int niters = 0;
1080 int nspans;
1081 double start, end;
1082
1083 if (!(state.type == DPDF || state.type == DXPS))
1084 return;
1085
1086 start = now ();
1087 while (pageno >= 0 && pageno < state.pagecount && !stop) {
1088 if (niters++ == 5) {
1089 niters = 0;
1090 if (hasdata ()) {
1091 printd ("progress 1 attention requested aborting search at %d",
1092 pageno);
1093 stop = 1;
1094 }
1095 else {
1096 printd ("progress %f searching in page %d",
1097 (double) (pageno + 1) / state.pagecount,
1098 pageno);
1099 }
1100 }
1101 pdimprev = NULL;
1102 for (i = 0; i < state.pagedimcount; ++i) {
1103 pdim = &state.pagedims[i];
1104 if (pdim->pageno == pageno) {
1105 goto found;
1106 }
1107 if (pdim->pageno > pageno) {
1108 pdim = pdimprev;
1109 goto found;
1110 }
1111 pdimprev = pdim;
1112 }
1113 pdim = pdimprev;
1114 found:
1115
1116 text = fz_new_text_span (state.ctx);
1117 tdev = fz_new_text_device (state.ctx, text);
1118
1119 switch (state.type) {
1120 case DPDF:
1121 u.pdfpage = pdf_load_page (state.u.pdf, pageno);
1122 pdf_run_page (state.u.pdf, u.pdfpage, tdev, fz_identity, NULL);
1123 break;
1124
1125 case DXPS:
1126 u.xpspage = xps_load_page (state.u.xps, pageno);
1127 xps_run_page (state.u.xps, u.xpspage, tdev, fz_identity, NULL);
1128 break;
1129
1130 default:
1131 ARSERT (0 && state.type);
1132 }
1133
1134 fz_free_device (tdev);
1135
1136 nspans = 0;
1137 for (span = text; span; span = span->next) {
1138 nspans++;
1139 }
1140 pspan = malloc (sizeof (void *) * nspans);
1141 if (!pspan) {
1142 err (1, "malloc span pointers %" FMT_s, sizeof (void *) * nspans);
1143 }
1144 for (i = 0, span = text; span; span = span->next, ++i) {
1145 pspan[i] = span;
1146 }
1147 qsort (pspan, nspans, sizeof (fz_text_span *), comparespans);
1148
1149 j = forward ? 0 : nspans - 1;
1150 while (nspans--) {
1151 regmatch_t rm;
1152
1153 span = pspan[j];
1154 j += forward ? 1 : -1;
1155 p = buf;
1156 for (i = 0; i < span->len; ++i) {
1157 int len;
1158 char cbuf[4];
1159
1160 if (forward) {
1161 if (span->text[i].bbox.y0 < y + 1) {
1162 continue;
1163 }
1164 }
1165 else {
1166 if (span->text[i].bbox.y0 > y - 1) {
1167 continue;
1168 }
1169 }
1170 len = runetochar (cbuf, &span->text[i].c);
1171 if (sizeof (buf) - 1 - (p - buf) > len) {
1172 int k;
1173 for (k = 0; k < len; ++k)
1174 *p++ = cbuf[k];
1175 }
1176 else {
1177 break;
1178 }
1179 }
1180 if (p == buf) {
1181 continue;
1182 }
1183 *p++ = 0;
1184
1185 ret = regexec (re, buf, 1, &rm, 0);
1186 if (ret) {
1187 if (ret != REG_NOMATCH) {
1188 size_t size;
1189 char errbuf[80];
1190 size = regerror (ret, re, errbuf, sizeof (errbuf));
1191 printd ("msg regexec error `%.*s'",
1192 (int) size, errbuf);
1193 fz_free_text_span (state.ctx, text);
1194 state.freepage (u.ptr);
1195 free (pspan);
1196 return;
1197 }
1198 }
1199 else {
1200 fz_bbox *sb, *eb;
1201 fz_point p1, p2, p3, p4;
1202 int a, b, c, l;
1203
1204 l = span->len;
1205 for (a = 0, c = 0; c < rm.rm_so && a < l; a++) {
1206 c += runelen (span->text[a].c);
1207 }
1208 for (b = a; c < rm.rm_eo - 1 && b < l; b++) {
1209 c += runelen (span->text[b].c);
1210 }
1211
1212 if (runelen (span->text[b].c) > 1) {
1213 b = MAX (0, b-1);
1214 }
1215 sb = &span->text[MIN (a, l-1)].bbox;
1216 eb = &span->text[MIN (b, l-1)].bbox;
1217
1218 p1.x = sb->x0;
1219 p1.y = sb->y0;
1220 p2.x = eb->x1;
1221 p2.y = sb->y0;
1222 p3.x = eb->x1;
1223 p3.y = eb->y1;
1224 p4.x = sb->x0;
1225 p4.y = eb->y1;
1226
1227 switch (state.type) {
1228 case DPDF:
1229 trimctm (u.pdfpage, pdim - state.pagedims);
1230 ctm = fz_concat (pdim->tctm, pdim->zoomctm);
1231 break;
1232
1233 case DXPS:
1234 ctm = pdim->ctm;
1235 break;
1236 }
1237
1238 p1 = fz_transform_point (ctm, p1);
1239 p2 = fz_transform_point (ctm, p2);
1240 p3 = fz_transform_point (ctm, p3);
1241 p4 = fz_transform_point (ctm, p4);
1242
1243 if (!stop) {
1244 printd ("firstmatch %d %d %f %f %f %f %f %f %f %f",
1245 pageno, 1,
1246 p1.x, p1.y,
1247 p2.x, p2.y,
1248 p3.x, p3.y,
1249 p4.x, p4.y);
1250
1251 printd ("progress 1 found at %d `%.*s' in %f sec",
1252 pageno, (int) (rm.rm_eo - rm.rm_so), &buf[rm.rm_so],
1253 now () - start);
1254 }
1255 else {
1256 printd ("match %d %d %f %f %f %f %f %f %f %f",
1257 pageno, 2,
1258 p1.x, p1.y,
1259 p2.x, p2.y,
1260 p3.x, p3.y,
1261 p4.x, p4.y);
1262 }
1263 stop = 1;
1264 }
1265 }
1266 if (forward) {
1267 pageno += 1;
1268 y = 0;
1269 }
1270 else {
1271 pageno -= 1;
1272 y = INT_MAX;
1273 }
1274 fz_free_text_span (state.ctx, text);
1275 state.freepage (u.ptr);
1276 free (pspan);
1277 }
1278 end = now ();
1279 if (!stop) {
1280 printd ("progress 1 no matches %f sec", end - start);
1281 }
1282 printd ("clearrects");
1283 }
1284
1285 static void set_tex_params (int colorspace)
1286 {
1287 switch (colorspace) {
1288 case 0:
1289 state.texiform = GL_RGBA8;
1290 state.texform = GL_RGBA;
1291 state.texty = GL_UNSIGNED_BYTE;
1292 state.colorspace = fz_device_rgb;
1293 break;
1294 case 1:
1295 state.texiform = GL_RGBA8;
1296 state.texform = GL_BGRA;
1297 state.texty = fz_is_big_endian ()
1298 ? GL_UNSIGNED_INT_8_8_8_8
1299 : GL_UNSIGNED_INT_8_8_8_8_REV;
1300 state.colorspace = fz_device_bgr;
1301 break;
1302 case 2:
1303 state.texiform = GL_LUMINANCE_ALPHA;
1304 state.texform = GL_LUMINANCE_ALPHA;
1305 state.texty = GL_UNSIGNED_BYTE;
1306 state.colorspace = fz_device_gray;
1307 break;
1308 default:
1309 errx (1, "invalid colorspce %d", colorspace);
1310 }
1311 }
1312
1313 static void realloctexts (int texcount)
1314 {
1315 size_t size;
1316
1317 if (texcount == state.texcount) return;
1318
1319 if (texcount < state.texcount) {
1320 glDeleteTextures (state.texcount - texcount,
1321 state.texids + texcount);
1322 }
1323
1324 size = texcount * sizeof (*state.texids);
1325 state.texids = realloc (state.texids, size);
1326 if (!state.texids) {
1327 err (1, "realloc texids %" FMT_s, size);
1328 }
1329
1330 size = texcount * sizeof (*state.texowners);
1331 state.texowners = realloc (state.texowners, size);
1332 if (!state.texowners) {
1333 err (1, "realloc texowners %" FMT_s, size);
1334 }
1335 if (texcount > state.texcount) {
1336 int i;
1337
1338 glGenTextures (texcount - state.texcount,
1339 state.texids + state.texcount);
1340 for (i = state.texcount; i < texcount; ++i) {
1341 state.texowners[i].w = -1;
1342 state.texowners[i].slice = NULL;
1343 }
1344 }
1345 state.texcount = texcount;
1346 state.texindex = 0;
1347 }
1348
1349 static void * mainloop (void *unused)
1350 {
1351 char *p = NULL;
1352 int len, ret, oldlen = 0;
1353
1354 for (;;) {
1355 len = readlen ();
1356 if (len == 0) {
1357 errx (1, "readlen returned 0");
1358 }
1359
1360 if (oldlen < len + 1) {
1361 p = realloc (p, len + 1);
1362 if (!p) {
1363 err (1, "realloc %d failed", len + 1);
1364 }
1365 oldlen = len + 1;
1366 }
1367 readdata (p, len);
1368 p[len] = 0;
1369
1370 if (!strncmp ("open", p, 4)) {
1371 size_t filenamelen;
1372 char *password;
1373 char *filename = p + 5;
1374
1375 filenamelen = strlen (filename);
1376 password = filename + filenamelen + 1;
1377
1378 openxref (filename, password);
1379 pdfinfo ();
1380 initpdims ();
1381 printd ("msg Opened %s (press h/F1 to get help)", filename);
1382 state.needoutline = 1;
1383 }
1384 else if (!strncmp ("cs", p, 2)) {
1385 int i, colorspace;
1386
1387 ret = sscanf (p + 2, " %d", &colorspace);
1388 if (ret != 1) {
1389 errx (1, "malformed cs `%.*s' ret=%d", len, p, ret);
1390 }
1391 lock ("cs");
1392 set_tex_params (colorspace);
1393 for (i = 0; i < state.texcount; ++i) {
1394 state.texowners[i].w = -1;
1395 state.texowners[i].slice = NULL;
1396 }
1397 unlock ("cs");
1398 }
1399 else if (!strncmp ("freepage", p, 8)) {
1400 void *ptr;
1401
1402 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1403 if (ret != 1) {
1404 errx (1, "malformed freepage `%.*s' ret=%d", len, p, ret);
1405 }
1406 freepage (ptr);
1407 }
1408 else if (!strncmp ("freetile", p, 8)) {
1409 void *ptr;
1410
1411 ret = sscanf (p + 8, " %" FMT_ptr, FMT_ptr_cast (&ptr));
1412 if (ret != 1) {
1413 errx (1, "malformed freetile `%.*s' ret=%d", len, p, ret);
1414 }
1415 freetile (ptr);
1416 }
1417 else if (!strncmp ("search", p, 6)) {
1418 int icase, pageno, y, ret, len2, forward;
1419 char *pattern;
1420 regex_t re;
1421
1422 ret = sscanf (p + 6, " %d %d %d %d,%n",
1423 &icase, &pageno, &y, &forward, &len2);
1424 if (ret != 4) {
1425 errx (1, "malformed search `%s' ret=%d", p, ret);
1426 }
1427
1428 pattern = p + 6 + len2;
1429 ret = regcomp (&re, pattern,
1430 REG_EXTENDED | (icase ? REG_ICASE : 0));
1431 if (ret) {
1432 char errbuf[80];
1433 size_t size;
1434
1435 size = regerror (ret, &re, errbuf, sizeof (errbuf));
1436 printd ("msg regcomp failed `%.*s'", (int) size, errbuf);
1437 }
1438 else {
1439 search (&re, pageno, y, forward);
1440 regfree (&re);
1441 }
1442 }
1443 else if (!strncmp ("geometry", p, 8)) {
1444 int w, h;
1445
1446 printd ("clear");
1447 ret = sscanf (p + 8, " %d %d", &w, &h);
1448 if (ret != 2) {
1449 errx (1, "malformed geometry `%.*s' ret=%d", len, p, ret);
1450 }
1451
1452 lock ("geometry");
1453 state.h = h;
1454 if (w != state.w) {
1455 int i;
1456 state.w = w;
1457 for (i = 0; i < state.texcount; ++i) {
1458 state.texowners[i].slice = NULL;
1459 }
1460 }
1461 layout ();
1462 process_outline ();
1463 state.gen++;
1464 unlock ("geometry");
1465 printd ("continue %d", state.pagecount);
1466 }
1467 else if (!strncmp ("reqlayout", p, 9)) {
1468 int rotate, proportional;
1469
1470 printd ("clear");
1471 ret = sscanf (p + 9, " %d %d", &rotate, &proportional);
1472 if (ret != 2) {
1473 errx (1, "bad reqlayout line `%.*s' ret=%d", len, p, ret);
1474 }
1475 lock ("reqlayout");
1476 if (state.rotate != rotate || state.proportional != proportional) {
1477 state.gen += 1;
1478 }
1479 state.rotate = rotate;
1480 state.proportional = proportional;
1481 layout ();
1482 process_outline ();
1483 state.gen++;
1484 unlock ("reqlayout");
1485 printd ("continue %d", state.pagecount);
1486 }
1487 else if (!strncmp ("page", p, 4)) {
1488 double a, b;
1489 struct page *page;
1490 int pageno, pindex, ret;
1491
1492 ret = sscanf (p + 4, " %d %d", &pageno, &pindex);
1493 if (ret != 2) {
1494 errx (1, "bad render line `%.*s' ret=%d", len, p, ret);
1495 }
1496
1497 lock ("page");
1498 a = now ();
1499 page = loadpage (pageno, pindex);
1500 b = now ();
1501 unlock ("page");
1502
1503 printd ("page %" FMT_ptr " %f", FMT_ptr_cast2 (page), b - a);
1504 }
1505 else if (!strncmp ("tile", p, 4)) {
1506 int x, y, w, h, ret;
1507 struct page *page;
1508 struct tile *tile;
1509 double a, b;
1510
1511 ret = sscanf (p + 4, " %" FMT_ptr " %d %d %d %d",
1512 FMT_ptr_cast (&page), &x, &y, &w, &h);
1513 if (ret != 5) {
1514 errx (1, "bad tile line `%.*s' ret=%d", len, p, ret);
1515 }
1516
1517 lock ("tile");
1518 a = now ();
1519 tile = rendertile (page, x, y, w, h);
1520 b = now ();
1521 unlock ("tile");
1522
1523 printd ("tile %d %d %" FMT_ptr " %u %f",
1524 x, y,
1525 FMT_ptr_cast2 (tile),
1526 tile->w * tile->h * tile->pixmap->n,
1527 b - a);
1528 }
1529 else if (!strncmp ("settrim", p, 7)) {
1530 int trimmargins;
1531 fz_bbox fuzz;
1532
1533 ret = sscanf (p + 7, " %d %d %d %d %d", &trimmargins,
1534 &fuzz.x0, &fuzz.y0, &fuzz.x1, &fuzz.y1);
1535 if (ret != 5) {
1536 errx (1, "malformed settrim `%.*s' ret=%d", len, p, ret);
1537 }
1538 printd ("clear");
1539 lock ("settrim");
1540 state.trimmargins = trimmargins;
1541 state.needoutline = 1;
1542 if (memcmp (&fuzz, &state.trimfuzz, sizeof (fuzz))) {
1543 state.trimanew = 1;
1544 state.trimfuzz = fuzz;
1545 }
1546 state.pagedimcount = 0;
1547 free (state.pagedims);
1548 state.pagedims = NULL;
1549 initpdims ();
1550 layout ();
1551 process_outline ();
1552 unlock ("settrim");
1553 printd ("continue %d", state.pagecount);
1554 }
1555 else if (!strncmp ("sliceh", p, 6)) {
1556 int h;
1557
1558 ret = sscanf (p + 6, " %d", &h);
1559 if (ret != 1) {
1560 errx (1, "malformed sliceh `%.*s' ret=%d", len, p, ret);
1561 }
1562 if (h != state.sliceheight) {
1563 int i;
1564
1565 state.sliceheight = h;
1566 for (i = 0; i < state.texcount; ++i) {
1567 state.texowners[i].w = -1;
1568 state.texowners[i].h = -1;
1569 state.texowners[i].slice = NULL;
1570 }
1571 }
1572 }
1573 else if (!strncmp ("interrupt", p, 9)) {
1574 printd ("vmsg interrupted");
1575 }
1576 else if (!strncmp ("quit", p, 4)) {
1577 return 0;
1578 }
1579 else {
1580 errx (1, "unknown command %.*s", len, p);
1581 }
1582 }
1583 return 0;
1584 }
1585
1586 CAMLprim value ml_realloctexts (value texcount_v)
1587 {
1588 CAMLparam1 (texcount_v);
1589 int ok;
1590
1591 if (trylock ("ml_realloctexts")) {
1592 ok = 0;
1593 goto done;
1594 }
1595 realloctexts (Int_val (texcount_v));
1596 ok = 1;
1597 unlock ("ml_realloctexts");
1598
1599 done:
1600 CAMLreturn (Val_bool (ok));
1601 }
1602
1603 static void showsel (struct page *page, int ox, int oy)
1604 {
1605 fz_bbox bbox;
1606 fz_text_span *span;
1607 struct mark first, last;
1608
1609 first = page->fmark;
1610 last = page->lmark;
1611
1612 if (!first.span || !last.span) return;
1613
1614 glEnable (GL_BLEND);
1615 glBlendFunc (GL_SRC_ALPHA, GL_SRC_ALPHA);
1616 glColor4f (0.5f, 0.5f, 0.0f, 0.6f);
1617
1618 ox += state.pagedims[page->pdimno].bounds.x0;
1619 oy += state.pagedims[page->pdimno].bounds.y0;
1620 for (span = first.span; span; span = span->next) {
1621 int i, j, k;
1622
1623 bbox.x0 = bbox.y0 = bbox.x1 = bbox.y1 = 0;
1624
1625 j = 0;
1626 k = span->len - 1;
1627
1628 if (span == page->fmark.span && span == page->lmark.span) {
1629 j = MIN (first.i, last.i);
1630 k = MAX (first.i, last.i);
1631 }
1632 else if (span == first.span) {
1633 j = first.i;
1634 }
1635 else if (span == last.span) {
1636 k = last.i;
1637 }
1638
1639 for (i = j; i <= k; ++i) {
1640 bbox = fz_union_bbox (bbox, span->text[i].bbox);
1641 }
1642 lprintf ("%d %d %d %d oy=%d ox=%d\n",
1643 bbox.x0,
1644 bbox.y0,
1645 bbox.x1,
1646 bbox.y1,
1647 oy, ox);
1648
1649 glRecti (bbox.x0 + ox, bbox.y0 + oy, bbox.x1 + ox, bbox.y1 + oy);
1650
1651 if (span == last.span) break;
1652 }
1653 glDisable (GL_BLEND);
1654 }
1655
1656 static void highlightlinks (struct page *page, int xoff, int yoff)
1657 {
1658 fz_matrix ctm;
1659 fz_link *link, *links;
1660
1661 switch (page->type) {
1662 case DPDF:
1663 links = page->u.pdfpage->links;
1664 break;
1665
1666 case DXPS:
1667 links = page->u.xpspage->links;
1668 break;
1669
1670 default:
1671 return;
1672 }
1673
1674 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
1675 glEnable (GL_LINE_STIPPLE);
1676 glLineStipple (0.5, 0xcccc);
1677
1678 xoff -= state.pagedims[page->pdimno].bounds.x0;
1679 yoff -= state.pagedims[page->pdimno].bounds.y0;
1680 ctm = fz_concat (pagectm (page), fz_translate (xoff, yoff));
1681
1682 glBegin (GL_QUADS);
1683 for (link = links; link; link = link->next) {
1684 fz_point p1, p2, p3, p4;
1685
1686 p1.x = link->rect.x0;
1687 p1.y = link->rect.y0;
1688
1689 p2.x = link->rect.x1;
1690 p2.y = link->rect.y0;
1691
1692 p3.x = link->rect.x1;
1693 p3.y = link->rect.y1;
1694
1695 p4.x = link->rect.x0;
1696 p4.y = link->rect.y1;
1697
1698 p1 = fz_transform_point (ctm, p1);
1699 p2 = fz_transform_point (ctm, p2);
1700 p3 = fz_transform_point (ctm, p3);
1701 p4 = fz_transform_point (ctm, p4);
1702
1703 switch (link->dest.kind) {
1704 case FZ_LINK_GOTO: glColor3ub (255, 0, 0); break;
1705 case FZ_LINK_URI: glColor3ub (0, 0, 255); break;
1706 default: glColor3ub (0, 0, 0); break;
1707 }
1708
1709 glVertex2f (p1.x, p1.y);
1710 glVertex2f (p2.x, p2.y);
1711 glVertex2f (p3.x, p3.y);
1712 glVertex2f (p4.x, p4.y);
1713 }
1714 glEnd ();
1715
1716 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
1717 glDisable (GL_LINE_STIPPLE);
1718 }
1719
1720 static void uploadslice (struct tile *tile, struct slice *slice)
1721 {
1722 int offset;
1723 struct slice *slice1;
1724
1725 offset = 0;
1726 for (slice1 = tile->slices; slice != slice1; slice1++) {
1727 offset += slice1->h * tile->w * tile->pixmap->n;
1728 }
1729 if (slice->texindex != -1 && slice->texindex < state.texcount
1730 && state.texowners[slice->texindex].slice == slice) {
1731 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[slice->texindex]);
1732 }
1733 else {
1734 int subimage = 0;
1735 int texindex = state.texindex++ % state.texcount;
1736
1737 if (state.texowners[texindex].w == tile->w) {
1738 if (state.texowners[texindex].h >= slice->h) {
1739 subimage = 1;
1740 }
1741 else {
1742 state.texowners[texindex].h = slice->h;
1743 }
1744 }
1745 else {
1746 state.texowners[texindex].h = slice->h;
1747 }
1748
1749 state.texowners[texindex].w = tile->w;
1750 state.texowners[texindex].slice = slice;
1751 slice->texindex = texindex;
1752
1753 glBindTexture (GL_TEXTURE_RECTANGLE_ARB, state.texids[texindex]);
1754 if (subimage) {
1755 glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB,
1756 0,
1757 0,
1758 0,
1759 tile->w,
1760 slice->h,
1761 state.texform,
1762 state.texty,
1763 tile->pixmap->samples+offset
1764 );
1765 }
1766 else {
1767 glTexImage2D (GL_TEXTURE_RECTANGLE_ARB,
1768 0,
1769 state.texiform,
1770 tile->w,
1771 slice->h,
1772 0,
1773 state.texform,
1774 state.texty,
1775 tile->pixmap->samples+offset
1776 );
1777 }
1778 }
1779 }
1780
1781 CAMLprim value ml_drawtile (value args_v, value ptr_v)
1782 {
1783 CAMLparam2 (args_v, ptr_v);
1784 int dispx = Int_val (Field (args_v, 0));
1785 int dispy = Int_val (Field (args_v, 1));
1786 int dispw = Int_val (Field (args_v, 2));
1787 int disph = Int_val (Field (args_v, 3));
1788 int tilex = Int_val (Field (args_v, 4));
1789 int tiley = Int_val (Field (args_v, 5));
1790 char *s = String_val (ptr_v);
1791 struct tile *tile = parse_pointer ("ml_drawtile", s);
1792
1793 glEnable (GL_TEXTURE_RECTANGLE_ARB);
1794 {
1795 int slicey, firstslice;
1796 struct slice *slice;
1797
1798 firstslice = tiley / tile->sliceheight;
1799 slice = &tile->slices[firstslice];
1800 slicey = tiley % tile->sliceheight;
1801
1802 while (disph > 0) {
1803 int dh;
1804
1805 dh = slice->h - slicey;
1806 dh = MIN (disph, dh);
1807 uploadslice (tile, slice);
1808
1809 glBegin (GL_QUADS);
1810 {
1811 glTexCoord2i (tilex, slicey);
1812 glVertex2i (dispx, dispy);
1813
1814 glTexCoord2i (tilex+dispw, slicey);
1815 glVertex2i (dispx+dispw, dispy);
1816
1817 glTexCoord2i (tilex+dispw, slicey+dh);
1818 glVertex2i (dispx+dispw, dispy+dh);
1819
1820 glTexCoord2i (tilex, slicey+dh);
1821 glVertex2i (dispx, dispy+dh);
1822 }
1823 glEnd ();
1824
1825 dispy += dh;
1826 disph -= dh;
1827 slice++;
1828 ARSERT (!(slice - tile->slices >= tile->slicecount && disph > 0));
1829 slicey = 0;
1830 }
1831 }
1832 glDisable (GL_TEXTURE_RECTANGLE_ARB);
1833 CAMLreturn (Val_unit);
1834 }
1835
1836 CAMLprim value ml_postprocess (value ptr_v, value hlinks_v,
1837 value xoff_v, value yoff_v)
1838 {
1839 CAMLparam4 (ptr_v, hlinks_v, xoff_v, yoff_v);
1840 int xoff = Int_val (xoff_v);
1841 int yoff = Int_val (yoff_v);
1842 char *s = String_val (ptr_v);
1843 struct page *page = parse_pointer ("ml_postprocess", s);
1844
1845 if (Bool_val (hlinks_v)) highlightlinks (page, xoff, yoff);
1846
1847 if (trylock ("ml_postprocess")) {
1848 goto done;
1849 }
1850 showsel (page, xoff, yoff);
1851 unlock ("ml_postprocess");
1852
1853 done:
1854 CAMLreturn (Val_unit);
1855 }
1856
1857 static fz_link *getlink (struct page *page, int x, int y)
1858 {
1859 fz_point p;
1860 fz_matrix ctm;
1861 fz_link *link, *links;
1862
1863 switch (page->type) {
1864 case DPDF:
1865 ctm = trimctm (page->u.pdfpage, page->pdimno);
1866 links = page->u.pdfpage->links;
1867 break;
1868
1869 case DXPS:
1870 ctm = fz_identity;
1871 links = page->u.xpspage->links;
1872 break;
1873
1874 default:
1875 return NULL;
1876 }
1877 p.x = x;
1878 p.y = y;
1879
1880 ctm = fz_concat (ctm, state.pagedims[page->pdimno].ctm);
1881 ctm = fz_invert_matrix (ctm);
1882 p = fz_transform_point (ctm, p);
1883
1884 for (link = links; link; link = link->next) {
1885 if (p.x >= link->rect.x0 && p.x <= link->rect.x1) {
1886 if (p.y >= link->rect.y0 && p.y <= link->rect.y1) {
1887 return link;
1888 }
1889 }
1890 }
1891 return NULL;
1892 }
1893
1894 static void droptext (struct page *page)
1895 {
1896 if (page->text) {
1897 fz_free_text_span (state.ctx, page->text);
1898 page->fmark.i = -1;
1899 page->lmark.i = -1;
1900 page->fmark.span = NULL;
1901 page->lmark.span = NULL;
1902 page->text = NULL;
1903 }
1904 }
1905
1906 static void dropslinks (struct page *page)
1907 {
1908 if (page->slinks) {
1909 free (page->slinks);
1910 page->slinks = NULL;
1911 page->slinkcount = 0;
1912 }
1913 }
1914
1915 static void ensuretext (struct page *page)
1916 {
1917 if (state.gen != page->gen) {
1918 droptext (page);
1919 dropslinks (page);
1920 page->gen = state.gen;
1921 }
1922 if (!page->text) {
1923 fz_device *tdev;
1924
1925 page->text = fz_new_text_span (state.ctx);
1926 tdev = fz_new_text_device (state.ctx, page->text);
1927 fz_run_display_list (page->dlist,
1928 tdev,
1929 pagectm (page),
1930 fz_infinite_bbox, NULL);
1931 fz_free_device (tdev);
1932 }
1933 }
1934
1935 static int compareslinks (const void *l, const void *r)
1936 {
1937 struct slink const *ls = l;
1938 struct slink const *rs = r;
1939 if (ls->bbox.y0 == rs->bbox.y0) {
1940 return rs->bbox.x0 - rs->bbox.x0;
1941 }
1942 return ls->bbox.y0 - rs->bbox.y0;
1943 }
1944
1945 static void ensureslinks (struct page *page)
1946 {
1947 fz_matrix ctm;
1948 int i, count = 0;
1949 size_t slinksize = sizeof (*page->slinks);
1950 fz_link *link, *links;
1951
1952 if (state.gen != page->gen) {
1953 droptext (page);
1954 dropslinks (page);
1955 page->gen = state.gen;
1956 }
1957 if (page->slinks) return;
1958
1959 switch (page->type) {
1960 case DPDF:
1961 links = page->u.pdfpage->links;
1962 ctm = fz_concat (trimctm (page->u.pdfpage, page->pdimno),
1963 state.pagedims[page->pdimno].ctm);
1964 break;
1965
1966 case DXPS:
1967 links = page->u.xpspage->links;
1968 ctm = state.pagedims[page->pdimno].ctm;
1969 break;
1970
1971 default:
1972 return;
1973 }
1974
1975 for (link = links; link; link = link->next) {
1976 count++;
1977 }
1978 if (count > 0) {
1979 page->slinkcount = count;
1980 page->slinks = calloc (count, slinksize);
1981 if (!page->slinks) {
1982 err (1, "realloc slinks %d", count);
1983 }
1984
1985 for (i = 0, link = links; link; ++i, link = link->next) {
1986 page->slinks[i].link = link;
1987 page->slinks[i].bbox =
1988 fz_round_rect (fz_transform_rect (ctm, link->rect));
1989 }
1990 qsort (page->slinks, count, slinksize, compareslinks);
1991 }
1992 }
1993
1994 CAMLprim value ml_find_page_with_links (value start_page_v, value dir_v)
1995 {
1996 CAMLparam2 (start_page_v, dir_v);
1997 CAMLlocal1 (ret_v);
1998 int i, dir = Int_val (dir_v);
1999 int start_page = Int_val (start_page_v);
2000 int end_page = dir > 0 ? state.pagecount : -1;
2001
2002 ret_v = Val_int (0);
2003 if (!(state.type == DPDF || state.type == DXPS)) {
2004 goto done;
2005 }
2006
2007 lock ("ml_findpage_with_links");
2008 for (i = start_page + dir; i != end_page; i += dir) {
2009 int found;
2010
2011 switch (state.type) {
2012 case DPDF:
2013 {
2014 pdf_page *page = pdf_load_page (state.u.pdf, i);
2015 found = !!page->links;
2016 freepdfpage (page);
2017 }
2018 break;
2019 case DXPS:
2020 {
2021 xps_page *page = xps_load_page (state.u.xps, i);
2022 found = !!page->links;
2023 freexpspage (page);
2024 }
2025 break;
2026
2027 default:
2028 ARSERT ("invalid document type");
2029 }
2030
2031 if (found) {
2032 ret_v = caml_alloc_small (1, 1);
2033 Field (ret_v, 0) = Val_int (i);
2034 goto unlock;
2035 }
2036 }
2037 unlock:
2038 unlock ("ml_findpage_with_links");
2039
2040 done:
2041 CAMLreturn (ret_v);
2042 }
2043
2044 enum { dir_first, dir_last};
2045 enum { dir_first_visible, dir_left, dir_right, dir_down, dir_up };
2046
2047 CAMLprim value ml_findlink (value ptr_v, value dir_v)
2048 {
2049 CAMLparam2 (ptr_v, dir_v);
2050 CAMLlocal3 (ret_v, tup_v, pos_v);
2051 struct page *page;
2052 int dirtag, i, slinkindex;
2053 struct slink *found = NULL ,*slink;
2054 char *s = String_val (ptr_v);
2055
2056 page = parse_pointer ("ml_findlink", s);
2057 ensureslinks (page);
2058
2059 ret_v = Val_int (0);
2060 if (Is_block (dir_v)) {
2061 dirtag = Tag_val (dir_v);
2062 switch (dirtag) {
2063 case dir_first_visible:
2064 {
2065 int x0, y0, dir, first_index, last_index;
2066
2067 pos_v = Field (dir_v, 0);
2068 x0 = Int_val (Field (pos_v, 0));
2069 y0 = Int_val (Field (pos_v, 1));
2070 dir = Int_val (Field (pos_v, 2));
2071
2072 if (dir >= 0) {
2073 dir = 1;
2074 first_index = 0;
2075 last_index = page->slinkcount;
2076 }
2077 else {
2078 first_index = page->slinkcount - 1;
2079 last_index = -1;
2080 }
2081
2082 for (i = first_index; i != last_index; i += dir) {
2083 slink = &page->slinks[i];
2084 if (slink->bbox.y0 >= y0 && slink->bbox.x0 >= x0) {
2085 found = slink;
2086 break;
2087 }
2088 }
2089 }
2090 break;
2091
2092 case dir_left:
2093 slinkindex = Int_val (Field (dir_v, 0));
2094 found = &page->slinks[slinkindex];
2095 for (i = slinkindex - 1; i >= 0; --i) {
2096 slink = &page->slinks[i];
2097 if (slink->bbox.x0 < found->bbox.x0) {
2098 found = slink;
2099 break;
2100 }
2101 }
2102 break;
2103
2104 case dir_right:
2105 slinkindex = Int_val (Field (dir_v, 0));
2106 found = &page->slinks[slinkindex];
2107 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2108 slink = &page->slinks[i];
2109 if (slink->bbox.x0 > found->bbox.x0) {
2110 found = slink;
2111 break;
2112 }
2113 }
2114 break;
2115
2116 case dir_down:
2117 slinkindex = Int_val (Field (dir_v, 0));
2118 found = &page->slinks[slinkindex];
2119 for (i = slinkindex + 1; i < page->slinkcount; ++i) {
2120 slink = &page->slinks[i];
2121 if (slink->bbox.y0 >= found->bbox.y0) {
2122 found = slink;
2123 break;
2124 }
2125 }
2126 break;
2127
2128 case dir_up:
2129 slinkindex = Int_val (Field (dir_v, 0));
2130 found = &page->slinks[slinkindex];
2131 for (i = slinkindex - 1; i >= 0; --i) {
2132 slink = &page->slinks[i];
2133 if (slink->bbox.y0 <= found->bbox.y0) {
2134 found = slink;
2135 break;
2136 }
2137 }
2138 break;
2139 }
2140 }
2141 else {
2142 dirtag = Int_val (dir_v);
2143 switch (dirtag) {
2144 case dir_first:
2145 found = page->slinks;
2146 break;
2147
2148 case dir_last:
2149 if (page->slinks) {
2150 found = page->slinks + (page->slinkcount - 1);
2151 }
2152 break;
2153 }
2154 }
2155 if (found) {
2156 tup_v = caml_alloc_tuple (5);
2157 ret_v = caml_alloc_small (2, 1);
2158 Field (tup_v, 0) = Val_int (found - page->slinks);
2159 Field (tup_v, 1) = Val_int (found->bbox.x0);
2160 Field (tup_v, 2) = Val_int (found->bbox.y0);
2161 Field (tup_v, 3) = Val_int (found->bbox.x1);
2162 Field (tup_v, 4) = Val_int (found->bbox.y1);
2163 Field (ret_v, 0) = tup_v;
2164 }
2165
2166 CAMLreturn (ret_v);
2167 }
2168
2169 enum { uuri, ugoto, utext, uunexpected, ulaunch, unamed, uremote };
2170
2171 #define LINKTOVAL \
2172 { \
2173 int pageno; \
2174 \
2175 switch (link->dest.kind) { \
2176 case FZ_LINK_GOTO: \
2177 { \
2178 fz_point p; \
2179 \
2180 pageno = link->dest.ld.gotor.page; \
2181 p.x = 0; \
2182 p.y = 0; \
2183 \
2184 if (link->dest.ld.gotor.flags & fz_link_flag_t_valid) { \
2185 p.y = link->dest.ld.gotor.lt.y; \
2186 p = fz_transform_point (pdim->lctm, p); \
2187 } \
2188 tup_v = caml_alloc_tuple (2); \
2189 ret_v = caml_alloc_small (1, ugoto); \
2190 Field (tup_v, 0) = Val_int (pageno); \
2191 Field (tup_v, 1) = Val_int (p.y); \
2192 Field (ret_v, 0) = tup_v; \
2193 } \
2194 break; \
2195 \
2196 case FZ_LINK_URI: \
2197 str_v = caml_copy_string (link->dest.ld.uri.uri); \
2198 ret_v = caml_alloc_small (1, uuri); \
2199 Field (ret_v, 0) = str_v; \
2200 break; \
2201 \
2202 case FZ_LINK_LAUNCH: \
2203 str_v = caml_copy_string (link->dest.ld.launch.file_spec); \
2204 ret_v = caml_alloc_small (1, ulaunch); \
2205 Field (ret_v, 0) = str_v; \
2206 break; \
2207 \
2208 case FZ_LINK_NAMED: \
2209 str_v = caml_copy_string (link->dest.ld.named.named); \
2210 ret_v = caml_alloc_small (1, unamed); \
2211 Field (ret_v, 0) = str_v; \
2212 break; \
2213 \
2214 case FZ_LINK_GOTOR: \
2215 str_v = caml_copy_string (link->dest.ld.gotor.file_spec); \
2216 pageno = link->dest.ld.gotor.page; \
2217 tup_v = caml_alloc_tuple (2); \
2218 ret_v = caml_alloc_small (1, uremote); \
2219 Field (tup_v, 0) = str_v; \
2220 Field (tup_v, 1) = Val_int (pageno); \
2221 Field (ret_v, 0) = tup_v; \
2222 break; \
2223 \
2224 default: \
2225 { \
2226 char buf[80]; \
2227 \
2228 snprintf (buf, sizeof (buf), \
2229 "unhandled link kind %d", link->dest.kind); \
2230 str_v = caml_copy_string (buf); \
2231 ret_v = caml_alloc_small (1, uunexpected); \
2232 Field (ret_v, 0) = str_v; \
2233 } \
2234 break; \
2235 } \
2236 }
2237
2238 CAMLprim value ml_getlink (value ptr_v, value n_v)
2239 {
2240 CAMLparam2 (ptr_v, n_v);
2241 CAMLlocal3 (ret_v, tup_v, str_v);
2242 fz_link *link;
2243 struct page *page;
2244 struct pagedim *pdim;
2245 char *s = String_val (ptr_v);
2246
2247 ret_v = Val_int (0);
2248 page = parse_pointer ("ml_getlink", s);
2249 pdim = &state.pagedims[page->pdimno];
2250 link = page->slinks[Int_val (n_v)].link;
2251 LINKTOVAL;
2252 CAMLreturn (ret_v);
2253 }
2254
2255 CAMLprim value ml_whatsunder (value ptr_v, value x_v, value y_v)
2256 {
2257 CAMLparam3 (ptr_v, x_v, y_v);
2258 CAMLlocal3 (ret_v, tup_v, str_v);
2259 fz_link *link;
2260 struct page *page;
2261 char *s = String_val (ptr_v);
2262 int x = Int_val (x_v), y = Int_val (y_v);
2263 struct pagedim *pdim;
2264
2265 ret_v = Val_int (0);
2266 if (trylock ("ml_whatsunder")) {
2267 goto done;
2268 }
2269
2270 page = parse_pointer ("ml_whatsunder", s);
2271 pdim = &state.pagedims[page->pdimno];
2272 x += pdim->bounds.x0;
2273 y += pdim->bounds.y0;
2274 link = getlink (page, x, y);
2275 if (link) {
2276 LINKTOVAL;
2277 }
2278 else {
2279 int i;
2280 fz_text_span *span;
2281
2282 ensuretext (page);
2283 for (span = page->text; span; span = span->next) {
2284 for (i = 0; i < span->len; ++i) {
2285 fz_bbox *b;
2286 b = &span->text[i].bbox;
2287 if ((x >= b->x0 && x <= b->x1 && y >= b->y0 && y <= b->y1)) {
2288 const char *n2 =
2289 span->font && span->font->name
2290 ? span->font->name
2291 : "Span has no font name"
2292 ;
2293 FT_FaceRec *face = span->font->ft_face;
2294 if (face && face->family_name) {
2295 char *s;
2296 char *n1 = face->family_name;
2297 size_t l1 = strlen (n1);
2298 size_t l2 = strlen (n2);
2299
2300 if (l1 != l2 || memcmp (n1, n2, l1)) {
2301 s = malloc (l1 + l2 + 2);
2302 if (s) {
2303 memcpy (s, n2, l2);
2304 s[l2] = '=';
2305 memcpy (s + l2 + 1, n1, l1 + 1);
2306 str_v = caml_copy_string (s);
2307 free (s);
2308 }
2309 }
2310 }
2311 if (str_v == 0) {
2312 str_v = caml_copy_string (n2);
2313 }
2314 ret_v = caml_alloc_small (1, utext);
2315 Field (ret_v, 0) = str_v;
2316 goto unlock;
2317 }
2318 }
2319 }
2320 }
2321 unlock:
2322 unlock ("ml_whatsunder");
2323
2324 done:
2325 CAMLreturn (ret_v);
2326 }
2327
2328 CAMLprim value ml_seltext (value ptr_v, value rect_v)
2329 {
2330 CAMLparam2 (ptr_v, rect_v);
2331 fz_bbox *b;
2332 struct page *page;
2333 fz_text_span *span;
2334 struct mark first, last;
2335 struct pagedim *pdim;
2336 int i, x0, x1, y0, y1;
2337 char *s = String_val (ptr_v);
2338
2339 if (trylock ("ml_seltext")) {
2340 goto done;
2341 }
2342
2343 page = parse_pointer ("ml_seltext", s);
2344 ensuretext (page);
2345
2346 pdim = &state.pagedims[page->pdimno];
2347 x0 = Int_val (Field (rect_v, 0)) + pdim->bounds.x0;;
2348 y0 = Int_val (Field (rect_v, 1)) + pdim->bounds.y0;
2349 x1 = Int_val (Field (rect_v, 2)) + pdim->bounds.x0;
2350 y1 = Int_val (Field (rect_v, 3)) + pdim->bounds.y0;
2351
2352 if (0) {
2353 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2354 glColor3ub (128, 128, 128);
2355 glRecti (x0, y0, x1, y1);
2356 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2357 }
2358
2359 first.span = NULL;
2360 last.span = NULL;
2361
2362 last.i = first.i = 0;
2363 first.span = page->text;
2364 for (span = page->text; span; span = span->next) {
2365 for (i = 0; i < span->len; ++i) {
2366 b = &span->text[i].bbox;
2367 int selected = 0;
2368
2369 if (x0 >= b->x0 && x0 <= b->x1 && y0 >= b->y0 && y0 <= b->y1) {
2370 first.i = i;
2371 first.span = span;
2372 selected = 1;
2373 }
2374 if (x1 >= b->x0 && x1 <= b->x1 && y1 >= b->y0 && y1 <= b->y1) {
2375 last.i = i;
2376 last.span = span;
2377 selected = 1;
2378 }
2379 if (0 && selected) {
2380 glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
2381 glColor3ub (128, 128, 128);
2382 glRecti (b->x0, b->y0, b->x1, b->y1);
2383 glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
2384 }
2385 }
2386 }
2387
2388 if (y1 < y0 || x1 < x0) {
2389 int swap = 0;
2390
2391 if (first.span == last.span) {
2392 swap = 1;
2393 }
2394 else {
2395 if (y1 < y0) {
2396 for (span = first.span; span && span != last.span;
2397 span = span->next) {
2398 if (span->eol) {
2399 swap = 1;
2400 break;
2401 }
2402 }
2403 }
2404 }
2405
2406 if (swap) {
2407 i = first.i;
2408 span = first.span;
2409 first.i = last.i;
2410 first.span = last.span;
2411 last.i = i;
2412 last.span = span;
2413 }
2414 }
2415
2416 page->fmark = first;
2417 page->lmark = last;
2418
2419 unlock ("ml_seltext");
2420
2421 done:
2422 CAMLreturn (Val_unit);
2423 }
2424
2425 static int pipespan (FILE *f, fz_text_span *span, int a, int b)
2426 {
2427 char buf[4];
2428 int i, len, ret;
2429
2430 for (i = a; i <= b; ++i) {
2431 len = runetochar (buf, &span->text[i].c);
2432 ret = fwrite (buf, len, 1, f);
2433
2434 if (ret != 1) {
2435 fprintf (stderr, "failed to write %d bytes ret=%d: %s\n",
2436 len, ret, strerror (errno));
2437 return -1;
2438 }
2439 }
2440 return 0;
2441 }
2442
2443 CAMLprim value ml_copysel (value command_v, value ptr_v)
2444 {
2445 CAMLparam1 (ptr_v);
2446 FILE *f;
2447 struct page *page;
2448 fz_text_span *span;
2449 char *s = String_val (ptr_v);
2450 char *command = String_val (command_v);
2451
2452 if (trylock ("ml_copysel")) {
2453 goto done;
2454 }
2455
2456 page = parse_pointer ("ml_sopysel", s);
2457
2458 if (!page->fmark.span || !page->lmark.span) {
2459 fprintf (stderr, "nothing to copy\n");
2460 goto unlock;
2461 }
2462
2463 f = popen (command, "w");
2464 if (!f) {
2465 fprintf (stderr, "failed to open sel pipe: %s\n",
2466 strerror (errno));
2467 f = stdout;
2468 }
2469
2470 for (span = page->fmark.span;
2471 span && span != page->lmark.span->next;
2472 span = span->next) {
2473 int a = span == page->fmark.span ? page->fmark.i : 0;
2474 int b = span == page->lmark.span ? page->lmark.i : span->len - 1;
2475 if (pipespan (f, span, a, b)) {
2476 goto close;
2477 }
2478 if (span->eol) {
2479 if (putc ('\n', f) == EOF) {
2480 fprintf (stderr, "failed break line on sel pipe: %s\n",
2481 strerror (errno));
2482 goto close;
2483 }
2484 }
2485 }
2486 page->lmark.span = NULL;
2487 page->fmark.span = NULL;
2488
2489 close:
2490 if (f != stdout) {
2491 int ret = pclose (f);
2492 if (ret == -1) {
2493 if (errno != ECHILD) {
2494 fprintf (stderr, "failed to close sel pipe: %s\n",
2495 strerror (errno));
2496 }
2497 }
2498 }
2499 unlock:
2500 unlock ("ml_copysel");
2501
2502 done:
2503 CAMLreturn (Val_unit);
2504 }
2505
2506 CAMLprim value ml_getpdimrect (value pagedimno_v)
2507 {
2508 CAMLparam1 (pagedimno_v);
2509 CAMLlocal1 (ret_v);
2510 int pagedimno = Int_val (pagedimno_v);
2511 fz_rect box;
2512
2513 ret_v = caml_alloc_small (4 * Double_wosize, Double_array_tag);
2514 if (trylock ("ml_getpdimrect")) {
2515 box = fz_empty_rect;
2516 }
2517 else {
2518 box = state.pagedims[pagedimno].mediabox;
2519 unlock ("ml_getpdimrect");
2520 }
2521
2522 Store_double_field (ret_v, 0, box.x0);
2523 Store_double_field (ret_v, 1, box.x1);
2524 Store_double_field (ret_v, 2, box.y0);
2525 Store_double_field (ret_v, 3, box.y1);
2526
2527 CAMLreturn (ret_v);
2528 }
2529
2530 static double getmaxw (void)
2531 {
2532 int i;
2533 struct pagedim *p;
2534 double maxw = 0.0;
2535
2536 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2537 double x0, x1, w;
2538
2539 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
2540 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
2541
2542 w = x1 - x0;
2543 maxw = MAX (w, maxw);
2544 }
2545 return maxw;
2546 }
2547
2548 CAMLprim value ml_getmaxw (value unit_v)
2549 {
2550 CAMLparam1 (unit_v);
2551 CAMLlocal1 (ret_v);
2552 double maxw = 0.0;
2553
2554 if (trylock ("ml_getmaxw")) {
2555 goto done;
2556 }
2557 maxw = getmaxw ();
2558 unlock ("ml_getmaxw");
2559 done:
2560 ret_v = caml_copy_double (maxw);
2561 CAMLreturn (ret_v);
2562 }
2563
2564 CAMLprim value ml_zoom_for_height (value winw_v, value winh_v, value dw_v)
2565 {
2566 CAMLparam3 (winw_v, winh_v, dw_v);
2567 CAMLlocal1 (ret_v);
2568 int i;
2569 double zoom = 1.0;
2570 double maxw = 0.0, maxh = 0.0;
2571 struct pagedim *p;
2572 double winw = Int_val (winw_v);
2573 double winh = Int_val (winh_v);
2574 double dw = Int_val (dw_v);
2575 double pw = 1.0, ph = 1.0, num, den;
2576
2577 if (trylock ("ml_zoom_for_height")) {
2578 goto done;
2579 }
2580
2581 if (state.proportional) {
2582 maxw = getmaxw ();
2583 }
2584
2585 for (i = 0, p = state.pagedims; i < state.pagedimcount; ++i, ++p) {
2586 double x0, x1, y0, y1, w, h, scaledh, scale;
2587
2588 x0 = MIN (p->mediabox.x0, p->mediabox.x1);
2589 x1 = MAX (p->mediabox.x0, p->mediabox.x1);
2590 y0 = MIN (p->mediabox.y0, p->mediabox.y1);
2591 y1 = MAX (p->mediabox.y0, p->mediabox.y1);
2592
2593 w = x1 - x0;
2594 h = y1 - y0;
2595
2596 if (state.proportional) {
2597 scale = w / maxw;
2598 scaledh = h * scale;
2599 }
2600 else {
2601 scale = 1.0;
2602 scaledh = h;
2603 }
2604
2605 if (scaledh > maxh) {
2606 maxh = scaledh;
2607 ph = scaledh;
2608 pw = w * scale;
2609 }
2610 }
2611
2612 num = (winh * pw) + (ph * dw);
2613 den = ph * winw;
2614 zoom = num / den;
2615
2616 unlock ("ml_zoom_for_height");
2617 done:
2618 ret_v = caml_copy_double (zoom);
2619 CAMLreturn (ret_v);
2620 }
2621
2622 #include "glfont.c"
2623
2624 CAMLprim value ml_draw_string (value pt_v, value x_v, value y_v, value string_v)
2625 {
2626 CAMLparam4 (pt_v, x_v, y_v, string_v);
2627 CAMLlocal1 (ret_v);
2628 int pt = Int_val(pt_v);
2629 int x = Int_val (x_v);
2630 int y = Int_val (y_v);
2631 double w;
2632
2633 w = draw_string (state.face, pt, x, y, String_val (string_v));
2634 ret_v = caml_copy_double (w);
2635 CAMLreturn (ret_v);
2636 }
2637
2638 CAMLprim value ml_measure_string (value pt_v, value string_v)
2639 {
2640 CAMLparam2 (pt_v, string_v);
2641 CAMLlocal1 (ret_v);
2642 int pt = Int_val (pt_v);
2643 double w;
2644
2645 w = measure_string (state.face, pt, String_val (string_v));
2646 ret_v = caml_copy_double (w);
2647 CAMLreturn (ret_v);
2648 }
2649
2650 CAMLprim value ml_getpagebox (value opaque_v)
2651 {
2652 CAMLparam1 (opaque_v);
2653 CAMLlocal1 (ret_v);
2654 fz_bbox bbox;
2655 fz_device *dev;
2656 char *s = String_val (opaque_v);
2657 struct page *page = parse_pointer ("ml_getpagebox", s);
2658
2659 ret_v = caml_alloc_tuple (4);
2660 dev = fz_new_bbox_device (state.ctx, &bbox);
2661 dev->hints |= FZ_IGNORE_SHADE;
2662
2663 switch (page->type) {
2664 case DPDF:
2665 pdf_run_page (state.u.pdf, page->u.pdfpage, dev, pagectm (page), NULL);
2666 break;
2667
2668 case DXPS:
2669 xps_run_page (state.u.xps, page->u.xpspage, dev, pagectm (page), NULL);
2670 break;
2671
2672 default:
2673 bbox = fz_infinite_bbox;
2674 break;
2675 }
2676
2677 fz_free_device (dev);
2678 Field (ret_v, 0) = Val_int (bbox.x0);
2679 Field (ret_v, 1) = Val_int (bbox.y0);
2680 Field (ret_v, 2) = Val_int (bbox.x1);
2681 Field (ret_v, 3) = Val_int (bbox.y1);
2682
2683 CAMLreturn (ret_v);
2684 }
2685
2686 CAMLprim value ml_setaalevel (value level_v)
2687 {
2688 CAMLparam1 (level_v);
2689
2690 state.aalevel = Int_val (level_v);
2691 CAMLreturn (Val_unit);
2692 }
2693
2694 #undef pixel
2695 #include <X11/Xlib.h>
2696 #include <GL/glx.h>
2697
2698 static struct {
2699 Display *dpy;
2700 GLXContext ctx;
2701 GLXDrawable drawable;
2702 } glx;
2703
2704 #include "keysym2ucs.c"
2705
2706 CAMLprim value ml_keysymtoutf8 (value keysym_v)
2707 {
2708 CAMLparam1 (keysym_v);
2709 CAMLlocal1 (str_v);
2710 KeySym keysym = Int_val (keysym_v);
2711 Rune rune;
2712 int len;
2713 char buf[5];
2714
2715 rune = keysym2ucs (keysym);
2716 len = runetochar (buf, &rune);
2717 buf[len] = 0;
2718 str_v = caml_copy_string (buf);
2719 CAMLreturn (str_v);
2720 }
2721
2722 CAMLprim value ml_glx (value win_v)
2723 {
2724 CAMLparam1 (win_v);
2725 int screen;
2726 XVisualInfo *visual;
2727 int attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
2728
2729 glx.dpy = XOpenDisplay (NULL);
2730 if (!glx.dpy) {
2731 caml_failwith ("XOpenDisplay failed");
2732 }
2733
2734 screen = DefaultScreen (glx.dpy);
2735 visual = glXChooseVisual (glx.dpy, screen, attributes);
2736 if (!visual) {
2737 XCloseDisplay (glx.dpy);
2738 glx.dpy = NULL;
2739 caml_failwith ("glXChooseVisual");
2740 }
2741
2742 glx.ctx = glXCreateContext (glx.dpy, visual, NULL, True);
2743 if (!glx.ctx) {
2744 XCloseDisplay (glx.dpy);
2745 XFree (visual);
2746 glx.dpy = NULL;
2747 caml_failwith ("glXCreateContext");
2748 }
2749
2750 XFree (visual);
2751 if (!glXMakeCurrent (glx.dpy, Int_val (win_v), glx.ctx)) {
2752 glXDestroyContext (glx.dpy, glx.ctx);
2753 XCloseDisplay (glx.dpy);
2754 glx.dpy = NULL;
2755 glx.ctx = NULL;
2756 caml_failwith ("glXMakeCurrent");
2757 }
2758 glx.drawable = Int_val (win_v);
2759
2760 CAMLreturn (Val_unit);
2761 }
2762
2763 CAMLprim value ml_swapb (value unit_v)
2764 {
2765 CAMLparam1 (unit_v);
2766 glXSwapBuffers (glx.dpy, glx.drawable);
2767 CAMLreturn (Val_unit);
2768 }
2769
2770 enum { piunknown, pilinux, piosx, pisun, pifreebsd,
2771 pidragonflybsd, piopenbsd, pinetbsd, picygwin };
2772
2773 CAMLprim value ml_platform (value unit_v)
2774 {
2775 CAMLparam1 (unit_v);
2776 int platid = piunknown;
2777
2778 #if defined __linux__
2779 platid = pilinux;
2780 #elif defined __CYGWIN__
2781 platid = picygwin;
2782 #elif defined __DragonFly__
2783 platid = pidragonflybsd;
2784 #elif defined __FreeBSD__
2785 platid = pifreebsd;
2786 #elif defined __OpenBSD__
2787 platid = piopenbsd;
2788 #elif defined __NetBSD__
2789 platid = pinetbsd;
2790 #elif defined __sun__
2791 platid = pisun;
2792 #elif defined __APPLE__
2793 platid = piosx;
2794 #endif
2795 CAMLreturn (Val_int (platid));
2796 }
2797
2798 CAMLprim value ml_cloexec (value fd_v)
2799 {
2800 CAMLparam1 (fd_v);
2801 int fd = Int_val (fd_v);
2802
2803 if (fcntl (fd, F_SETFD, FD_CLOEXEC, 1)) {
2804 uerror ("fcntl", Nothing);
2805 }
2806 CAMLreturn (Val_unit);
2807 }
2808
2809 CAMLprim value ml_init (value pipe_v, value params_v)
2810 {
2811 CAMLparam2 (pipe_v, params_v);
2812 CAMLlocal2 (trim_v, fuzz_v);
2813 int ret;
2814 int texcount;
2815 char *fontpath;
2816 int colorspace;
2817 int mustoresize;
2818 struct sigaction sa;
2819
2820 state.cr = Int_val (Field (pipe_v, 0));
2821 state.cw = Int_val (Field (pipe_v, 1));
2822 state.rotate = Int_val (Field (params_v, 0));
2823 state.proportional = Bool_val (Field (params_v, 1));
2824 trim_v = Field (params_v, 2);
2825 texcount = Int_val (Field (params_v, 3));
2826 state.sliceheight = Int_val (Field (params_v, 4));
2827 mustoresize = Int_val (Field (params_v, 5));
2828 colorspace = Int_val (Field (params_v, 6));
2829 fontpath = String_val (Field (params_v, 7));
2830
2831 state.ctx = fz_new_context (NULL, NULL, mustoresize);
2832
2833 state.trimmargins = Bool_val (Field (trim_v, 0));
2834 fuzz_v = Field (trim_v, 1);
2835 state.trimfuzz.x0 = Int_val (Field (fuzz_v, 0));
2836 state.trimfuzz.y0 = Int_val (Field (fuzz_v, 1));
2837 state.trimfuzz.x1 = Int_val (Field (fuzz_v, 2));
2838 state.trimfuzz.y1 = Int_val (Field (fuzz_v, 3));
2839
2840 set_tex_params (colorspace);
2841
2842 if (*fontpath) {
2843 state.face = load_font (fontpath);
2844 }
2845 else {
2846 unsigned int len;
2847 void *base = pdf_find_substitute_font (0, 0, 0, 0, &len);
2848
2849 state.face = load_builtin_font (base, len);
2850 }
2851 if (!state.face) _exit (1);
2852
2853 realloctexts (texcount);
2854
2855 sa.sa_handler = SIG_DFL;
2856 if (sigemptyset (&sa.sa_mask)) {
2857 err (1, "sigemptyset");
2858 }
2859 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
2860 if (sigaction (SIGCHLD, &sa, NULL)) {
2861 err (1, "sigaction");
2862 }
2863
2864 ret = pthread_create (&state.thread, NULL, mainloop, NULL);
2865 if (ret) {
2866 errx (1, "pthread_create: %s", strerror (ret));
2867 }
2868
2869 CAMLreturn (Val_unit);
2870 }
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