Leptonica 1.85.0
Image processing and image analysis suite
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ccbord.c
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1/*====================================================================*
2 - Copyright (C) 2001 Leptonica. All rights reserved.
3 -
4 - Redistribution and use in source and binary forms, with or without
5 - modification, are permitted provided that the following conditions
6 - are met:
7 - 1. Redistributions of source code must retain the above copyright
8 - notice, this list of conditions and the following disclaimer.
9 - 2. Redistributions in binary form must reproduce the above
10 - copyright notice, this list of conditions and the following
11 - disclaimer in the documentation and/or other materials
12 - provided with the distribution.
13 -
14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *====================================================================*/
26
27
250#ifdef HAVE_CONFIG_H
251#include <config_auto.h>
252#endif /* HAVE_CONFIG_H */
253
254#include <string.h>
255#include "allheaders.h"
256#include "pix_internal.h"
257#include "ccbord_internal.h"
258
259static const l_int32 INITIAL_PTR_ARRAYSIZE = 20; /* n'import quoi */
260
261 /* In ccbaGenerateSinglePath(): don't save holes
262 * in c.c. with ridiculously many small holes */
263static const l_int32 NMAX_HOLES = 150;
264
265 /* Tables used to trace the border.
266 * - The 8 pixel positions of neighbors Q are labeled clockwise
267 * starting from the west:
268 * 1 2 3
269 * 0 P 4
270 * 7 6 5
271 * where the labels are the index offset [0, ... 7] of Q relative to P.
272 * - xpostab[] and ypostab[] give the actual x and y pixel offsets
273 * of Q relative to P, indexed by the index offset.
274 * - qpostab[pos] gives the new index offset of Q relative to P, at
275 * the time that a new P has been chosen to be in index offset
276 * position 'pos' relative to the previous P. The relation
277 * between P and Q is always 4-connected. */
278static const l_int32 xpostab[] = {-1, -1, 0, 1, 1, 1, 0, -1};
279static const l_int32 ypostab[] = {0, -1, -1, -1, 0, 1, 1, 1};
280static const l_int32 qpostab[] = {6, 6, 0, 0, 2, 2, 4, 4};
281
282 /* Static functions */
283static CCBORDA *ccbaCreate(PIX *pixs, l_int32 n);
284static CCBORD *ccbCreate(PIX *pixs);
285static void ccbDestroy(CCBORD **pccb);
286static l_ok ccbaAddCcb(CCBORDA *ccba, CCBORD *ccb);
287static l_int32 ccbaExtendArray(CCBORDA *ccba);
288static l_int32 ccbaGetCount(CCBORDA *ccba);
289static CCBORD *ccbaGetCcb(CCBORDA *ccba, l_int32 index);
290static CCBORD *pixGetCCBorders(PIX *pixs, BOX *box);
291static PTA *pixGetOuterBorderPta(PIX *pixs, BOX *box);
292static l_ok pixGetHoleBorder(CCBORD *ccb, PIX *pixs, BOX *box,
293 l_int32 xs, l_int32 ys);
294static l_int32 findNextBorderPixel(l_int32 w, l_int32 h, l_uint32 *data,
295 l_int32 wpl, l_int32 px, l_int32 py,
296 l_int32 *pqpos, l_int32 *pnpx,
297 l_int32 *pnpy);
298static void locateOutsideSeedPixel(l_int32 fpx, l_int32 fpy, l_int32 spx,
299 l_int32 spy, l_int32 *pxs, l_int32 *pys);
300static PTA *getCutPathForHole(PIX *pix, PTA *pta, BOX *boxinner, l_int32 *pdir,
301 l_int32 *plen);
302
303#ifndef NO_CONSOLE_IO
304#define DEBUG_PRINT 0
305#endif /* NO CONSOLE_IO */
306
307
308/*---------------------------------------------------------------------*
309 * ccba and ccb creation and destruction *
310 *---------------------------------------------------------------------*/
318static CCBORDA *
319ccbaCreate(PIX *pixs,
320 l_int32 n)
321{
322CCBORDA *ccba;
323
324 if (n <= 0)
325 n = INITIAL_PTR_ARRAYSIZE;
326
327 ccba = (CCBORDA *)LEPT_CALLOC(1, sizeof(CCBORDA));
328 if (pixs) {
329 ccba->pix = pixClone(pixs);
330 ccba->w = pixGetWidth(pixs);
331 ccba->h = pixGetHeight(pixs);
332 }
333 ccba->n = 0;
334 ccba->nalloc = n;
335 if ((ccba->ccb = (CCBORD **)LEPT_CALLOC(n, sizeof(CCBORD *))) == NULL) {
336 ccbaDestroy(&ccba);
337 return (CCBORDA *)ERROR_PTR("ccba ptrs not made", __func__, NULL);
338 }
339 return ccba;
340}
341
342
349void
350ccbaDestroy(CCBORDA **pccba)
351{
352l_int32 i;
353CCBORDA *ccba;
354
355 if (pccba == NULL) {
356 L_WARNING("ptr address is NULL!\n", __func__);
357 return;
358 }
359
360 if ((ccba = *pccba) == NULL)
361 return;
362
363 pixDestroy(&ccba->pix);
364 for (i = 0; i < ccba->n; i++)
365 ccbDestroy(&ccba->ccb[i]);
366 LEPT_FREE(ccba->ccb);
367 LEPT_FREE(ccba);
368 *pccba = NULL;
369}
370
371
378static CCBORD *
379ccbCreate(PIX *pixs)
380{
381BOXA *boxa;
382CCBORD *ccb;
383PTA *start;
384PTAA *local;
385
386 if (pixs && pixGetDepth(pixs) != 1) /* pixs can be null */
387 return (CCBORD *)ERROR_PTR("pixs defined and not 1bpp", __func__, NULL);
388
389 ccb = (CCBORD *)LEPT_CALLOC(1, sizeof(CCBORD));
390 ccb->refcount = 1;
391 if (pixs)
392 ccb->pix = pixClone(pixs);
393 boxa = boxaCreate(1);
394 ccb->boxa = boxa;
395 start = ptaCreate(1);
396 ccb->start = start;
397 local = ptaaCreate(1);
398 ccb->local = local;
399 return ccb;
400}
401
402
409static void
410ccbDestroy(CCBORD **pccb)
411{
412CCBORD *ccb;
413
414 if (pccb == NULL) {
415 L_WARNING("ptr address is NULL!\n", __func__);
416 return;
417 }
418
419 if ((ccb = *pccb) == NULL)
420 return;
421
422 if (--ccb->refcount == 0) {
423 if (ccb->pix)
424 pixDestroy(&ccb->pix);
425 if (ccb->boxa)
426 boxaDestroy(&ccb->boxa);
427 if (ccb->start)
428 ptaDestroy(&ccb->start);
429 if (ccb->local)
430 ptaaDestroy(&ccb->local);
431 if (ccb->global)
432 ptaaDestroy(&ccb->global);
433 if (ccb->step)
434 numaaDestroy(&ccb->step);
435 if (ccb->splocal)
436 ptaDestroy(&ccb->splocal);
437 if (ccb->spglobal)
438 ptaDestroy(&ccb->spglobal);
439 LEPT_FREE(ccb);
440 *pccb = NULL;
441 }
442}
443
444
445/*---------------------------------------------------------------------*
446 * ccba addition *
447 *---------------------------------------------------------------------*/
455static l_ok
456ccbaAddCcb(CCBORDA *ccba,
457 CCBORD *ccb)
458{
459l_int32 n;
460
461 if (!ccba)
462 return ERROR_INT("ccba not defined", __func__, 1);
463 if (!ccb)
464 return ERROR_INT("ccb not defined", __func__, 1);
465
466 n = ccbaGetCount(ccba);
467 if (n >= ccba->nalloc) {
468 if (ccbaExtendArray(ccba))
469 return ERROR_INT("extension failed", __func__, 1);
470 }
471 ccba->ccb[n] = ccb;
472 ccba->n++;
473 return 0;
474}
475
476
483static l_int32
484ccbaExtendArray(CCBORDA *ccba)
485{
486 if (!ccba)
487 return ERROR_INT("ccba not defined", __func__, 1);
488
489 if ((ccba->ccb = (CCBORD **)reallocNew((void **)&ccba->ccb,
490 sizeof(CCBORD *) * ccba->nalloc,
491 2 * sizeof(CCBORD *) * ccba->nalloc)) == NULL)
492 return ERROR_INT("new ptr array not returned", __func__, 1);
493
494 ccba->nalloc = 2 * ccba->nalloc;
495 return 0;
496}
497
498
499
500/*---------------------------------------------------------------------*
501 * ccba accessors *
502 *---------------------------------------------------------------------*/
509static l_int32
510ccbaGetCount(CCBORDA *ccba)
511{
512
513 if (!ccba)
514 return ERROR_INT("ccba not defined", __func__, 0);
515
516 return ccba->n;
517}
518
519
532static CCBORD *
533ccbaGetCcb(CCBORDA *ccba,
534 l_int32 index)
535{
536CCBORD *ccb;
537
538 if (!ccba)
539 return (CCBORD *)ERROR_PTR("ccba not defined", __func__, NULL);
540 if (index < 0 || index >= ccba->n)
541 return (CCBORD *)ERROR_PTR("index out of bounds", __func__, NULL);
542
543 ccb = ccba->ccb[index];
544 ccb->refcount++;
545 return ccb;
546}
547
548
549
550/*---------------------------------------------------------------------*
551 * Top-level border-finding routines *
552 *---------------------------------------------------------------------*/
559CCBORDA *
560pixGetAllCCBorders(PIX *pixs)
561{
562l_int32 n, i;
563BOX *box;
564BOXA *boxa;
565CCBORDA *ccba;
566CCBORD *ccb;
567PIX *pix;
568PIXA *pixa;
569
570 if (!pixs)
571 return (CCBORDA *)ERROR_PTR("pixs not defined", __func__, NULL);
572 if (pixGetDepth(pixs) != 1)
573 return (CCBORDA *)ERROR_PTR("pixs not binary", __func__, NULL);
574
575 if ((boxa = pixConnComp(pixs, &pixa, 8)) == NULL)
576 return (CCBORDA *)ERROR_PTR("boxa not made", __func__, NULL);
577 n = boxaGetCount(boxa);
578
579 if ((ccba = ccbaCreate(pixs, n)) == NULL) {
580 boxaDestroy(&boxa);
581 pixaDestroy(&pixa);
582 return (CCBORDA *)ERROR_PTR("ccba not made", __func__, NULL);
583 }
584 for (i = 0; i < n; i++) {
585 if ((pix = pixaGetPix(pixa, i, L_CLONE)) == NULL) {
586 ccbaDestroy(&ccba);
587 pixaDestroy(&pixa);
588 boxaDestroy(&boxa);
589 return (CCBORDA *)ERROR_PTR("pix not found", __func__, NULL);
590 }
591 if ((box = pixaGetBox(pixa, i, L_CLONE)) == NULL) {
592 ccbaDestroy(&ccba);
593 pixaDestroy(&pixa);
594 boxaDestroy(&boxa);
595 pixDestroy(&pix);
596 return (CCBORDA *)ERROR_PTR("box not found", __func__, NULL);
597 }
598 ccb = pixGetCCBorders(pix, box);
599 pixDestroy(&pix);
600 boxDestroy(&box);
601 if (!ccb) {
602 ccbaDestroy(&ccba);
603 pixaDestroy(&pixa);
604 boxaDestroy(&boxa);
605 return (CCBORDA *)ERROR_PTR("ccb not made", __func__, NULL);
606 }
607/* ptaWriteStream(stderr, ccb->local, 1); */
608 ccbaAddCcb(ccba, ccb);
609 }
610
611 boxaDestroy(&boxa);
612 pixaDestroy(&pixa);
613 return ccba;
614}
615
616
643static CCBORD *
644pixGetCCBorders(PIX *pixs,
645 BOX *box)
646{
647l_int32 allzero, i, x, xh, w, nh;
648l_int32 xs, ys; /* starting hole border pixel, relative in pixs */
649l_uint32 val;
650BOX *boxt, *boxe;
651BOXA *boxa;
652CCBORD *ccb;
653PIX *pixh; /* for hole components */
654PIX *pixt;
655PIXA *pixa;
656
657 if (!pixs)
658 return (CCBORD *)ERROR_PTR("pixs not defined", __func__, NULL);
659 if (!box)
660 return (CCBORD *)ERROR_PTR("box not defined", __func__, NULL);
661 if (pixGetDepth(pixs) != 1)
662 return (CCBORD *)ERROR_PTR("pixs not binary", __func__, NULL);
663
664 pixZero(pixs, &allzero);
665 if (allzero)
666 return (CCBORD *)ERROR_PTR("pixs all 0", __func__, NULL);
667
668 if ((ccb = ccbCreate(pixs)) == NULL)
669 return (CCBORD *)ERROR_PTR("ccb not made", __func__, NULL);
670
671 /* Get the exterior border */
672 pixGetOuterBorder(ccb, pixs, box);
673
674 /* Find the holes, if any */
675 if ((pixh = pixHolesByFilling(pixs, 4)) == NULL) {
676 ccbDestroy(&ccb);
677 return (CCBORD *)ERROR_PTR("pixh not made", __func__, NULL);
678 }
679 pixZero(pixh, &allzero);
680 if (allzero) { /* no holes */
681 pixDestroy(&pixh);
682 return ccb;
683 }
684
685 /* Get c.c. and locations of the holes */
686 if ((boxa = pixConnComp(pixh, &pixa, 4)) == NULL) {
687 ccbDestroy(&ccb);
688 pixDestroy(&pixh);
689 return (CCBORD *)ERROR_PTR("boxa not made", __func__, NULL);
690 }
691 nh = boxaGetCount(boxa);
692/* lept_stderr("%d holes\n", nh); */
693
694 /* For each hole, find an interior pixel within the hole,
695 * then march to the right and stop at the first border
696 * pixel. Save the bounding box of the border, which
697 * is 1 pixel bigger on each side than the bounding box
698 * of the hole itself. Note that we use a pix of the
699 * c.c. of the hole itself to be sure that we start
700 * with a pixel in the hole of the proper component.
701 * If we did everything from the parent component, it is
702 * possible to start in a different hole that is within
703 * the b.b. of a larger hole. */
704 w = pixGetWidth(pixs);
705 for (i = 0; i < nh; i++) {
706 boxt = boxaGetBox(boxa, i, L_CLONE);
707 pixt = pixaGetPix(pixa, i, L_CLONE);
708 ys = boxt->y; /* there must be a hole pixel on this raster line */
709 for (x = 0; x < boxt->w; x++) { /* look for (fg) hole pixel */
710 pixGetPixel(pixt, x, 0, &val);
711 if (val == 1) {
712 xh = x;
713 break;
714 }
715 }
716 if (x == boxt->w) {
717 L_WARNING("no hole pixel found!\n", __func__);
718 continue;
719 }
720 for (x = xh + boxt->x; x < w; x++) { /* look for (fg) border pixel */
721 pixGetPixel(pixs, x, ys, &val);
722 if (val == 1) {
723 xs = x;
724 break;
725 }
726 }
727 boxe = boxCreate(boxt->x - 1, boxt->y - 1, boxt->w + 2, boxt->h + 2);
728#if DEBUG_PRINT
729 boxPrintStreamInfo(stderr, box);
730 boxPrintStreamInfo(stderr, boxe);
731 lept_stderr("xs = %d, ys = %d\n", xs, ys);
732#endif /* DEBUG_PRINT */
733 pixGetHoleBorder(ccb, pixs, boxe, xs, ys);
734 boxDestroy(&boxt);
735 boxDestroy(&boxe);
736 pixDestroy(&pixt);
737 }
738
739 boxaDestroy(&boxa);
740 pixaDestroy(&pixa);
741 pixDestroy(&pixh);
742 return ccb;
743}
744
745
752PTAA *
753pixGetOuterBordersPtaa(PIX *pixs)
754{
755l_int32 i, n;
756BOX *box;
757BOXA *boxa;
758PIX *pix;
759PIXA *pixa;
760PTA *pta;
761PTAA *ptaa;
762
763 if (!pixs)
764 return (PTAA *)ERROR_PTR("pixs not defined", __func__, NULL);
765 if (pixGetDepth(pixs) != 1)
766 return (PTAA *)ERROR_PTR("pixs not binary", __func__, NULL);
767
768 boxa = pixConnComp(pixs, &pixa, 8);
769 n = boxaGetCount(boxa);
770 if (n == 0) {
771 boxaDestroy(&boxa);
772 pixaDestroy(&pixa);
773 return (PTAA *)ERROR_PTR("pixs empty", __func__, NULL);
774 }
775
776 ptaa = ptaaCreate(n);
777 for (i = 0; i < n; i++) {
778 box = boxaGetBox(boxa, i, L_CLONE);
779 pix = pixaGetPix(pixa, i, L_CLONE);
780 pta = pixGetOuterBorderPta(pix, box);
781 if (pta)
782 ptaaAddPta(ptaa, pta, L_INSERT);
783 boxDestroy(&box);
784 pixDestroy(&pix);
785 }
786
787 pixaDestroy(&pixa);
788 boxaDestroy(&boxa);
789 return ptaa;
790}
791
792
810static PTA *
811pixGetOuterBorderPta(PIX *pixs,
812 BOX *box)
813{
814l_int32 allzero, x, y;
815BOX *boxt;
816CCBORD *ccb;
817PTA *ptaloc, *ptad;
818
819 if (!pixs)
820 return (PTA *)ERROR_PTR("pixs not defined", __func__, NULL);
821 if (pixGetDepth(pixs) != 1)
822 return (PTA *)ERROR_PTR("pixs not binary", __func__, NULL);
823
824 pixZero(pixs, &allzero);
825 if (allzero)
826 return (PTA *)ERROR_PTR("pixs all 0", __func__, NULL);
827
828 if ((ccb = ccbCreate(pixs)) == NULL)
829 return (PTA *)ERROR_PTR("ccb not made", __func__, NULL);
830 if (!box)
831 boxt = boxCreate(0, 0, pixGetWidth(pixs), pixGetHeight(pixs));
832 else
833 boxt = boxClone(box);
834
835 /* Get the exterior border in local coords */
836 pixGetOuterBorder(ccb, pixs, boxt);
837 if ((ptaloc = ptaaGetPta(ccb->local, 0, L_CLONE)) == NULL) {
838 ccbDestroy(&ccb);
839 boxDestroy(&boxt);
840 return (PTA *)ERROR_PTR("ptaloc not made", __func__, NULL);
841 }
842
843 /* Transform to global coordinates, if they are given */
844 if (box) {
845 boxGetGeometry(box, &x, &y, NULL, NULL);
846 ptad = ptaTransform(ptaloc, x, y, 1.0, 1.0);
847 } else {
848 ptad = ptaClone(ptaloc);
849 }
850
851 ptaDestroy(&ptaloc);
852 boxDestroy(&boxt);
853 ccbDestroy(&ccb);
854 return ptad;
855}
856
857
858/*---------------------------------------------------------------------*
859 * Lower-level border-finding routines *
860 *---------------------------------------------------------------------*/
881l_ok
882pixGetOuterBorder(CCBORD *ccb,
883 PIX *pixs,
884 BOX *box)
885{
886l_int32 fpx, fpy, spx, spy, qpos;
887l_int32 px, py, npx, npy;
888l_int32 w, h, wpl;
889l_uint32 *data;
890PTA *pta;
891PIX *pixb; /* with 1 pixel border */
892
893 if (!ccb)
894 return ERROR_INT("ccb not defined", __func__, 1);
895 if (!pixs)
896 return ERROR_INT("pixs not defined", __func__, 1);
897 if (!box)
898 return ERROR_INT("box not defined", __func__, 1);
899
900 /* Add 1-pixel border all around, and find start pixel */
901 if ((pixb = pixAddBorder(pixs, 1, 0)) == NULL)
902 return ERROR_INT("pixs not made", __func__, 1);
903 if (!nextOnPixelInRaster(pixb, 1, 1, &px, &py)) {
904 pixDestroy(&pixb);
905 return ERROR_INT("no start pixel found", __func__, 1);
906 }
907 qpos = 0; /* relative to p */
908 fpx = px; /* save location of first pixel on border */
909 fpy = py;
910
911 /* Save box and start pixel in relative coords */
912 boxaAddBox(ccb->boxa, box, L_COPY);
913 ptaAddPt(ccb->start, px - 1, py - 1);
914
915 pta = ptaCreate(0);
916 ptaaAddPta(ccb->local, pta, L_INSERT);
917 ptaAddPt(pta, px - 1, py - 1); /* initial point */
918 pixGetDimensions(pixb, &w, &h, NULL);
919 data = pixGetData(pixb);
920 wpl = pixGetWpl(pixb);
921
922 /* Get the second point; if there is none, return */
923 if (findNextBorderPixel(w, h, data, wpl, px, py, &qpos, &npx, &npy)) {
924 pixDestroy(&pixb);
925 return 0;
926 }
927
928 spx = npx; /* save location of second pixel on border */
929 spy = npy;
930 ptaAddPt(pta, npx - 1, npy - 1); /* second point */
931 px = npx;
932 py = npy;
933
934 while (1) {
935 findNextBorderPixel(w, h, data, wpl, px, py, &qpos, &npx, &npy);
936 if (px == fpx && py == fpy && npx == spx && npy == spy)
937 break;
938 ptaAddPt(pta, npx - 1, npy - 1);
939 px = npx;
940 py = npy;
941 }
942
943 pixDestroy(&pixb);
944 return 0;
945}
946
947
967static l_ok
968pixGetHoleBorder(CCBORD *ccb,
969 PIX *pixs,
970 BOX *box,
971 l_int32 xs,
972 l_int32 ys)
973{
974l_int32 fpx, fpy, spx, spy, qpos;
975l_int32 px, py, npx, npy;
976l_int32 w, h, wpl;
977l_uint32 *data;
978PTA *pta;
979
980 if (!ccb)
981 return ERROR_INT("ccb not defined", __func__, 1);
982 if (!pixs)
983 return ERROR_INT("pixs not defined", __func__, 1);
984 if (!box)
985 return ERROR_INT("box not defined", __func__, 1);
986
987 /* Add border and find start pixel */
988 qpos = 0; /* orientation of Q relative to P */
989 fpx = xs; /* save location of first pixel on border */
990 fpy = ys;
991
992 /* Save box and start pixel */
993 boxaAddBox(ccb->boxa, box, L_COPY);
994 ptaAddPt(ccb->start, xs, ys);
995
996 pta = ptaCreate(0);
997 ptaaAddPta(ccb->local, pta, L_INSERT);
998 ptaAddPt(pta, xs, ys); /* initial pixel */
999
1000 w = pixGetWidth(pixs);
1001 h = pixGetHeight(pixs);
1002 data = pixGetData(pixs);
1003 wpl = pixGetWpl(pixs);
1004
1005 /* Get the second point; there should always be at least 4 pts
1006 * in a minimal hole border! */
1007 if (findNextBorderPixel(w, h, data, wpl, xs, ys, &qpos, &npx, &npy))
1008 return ERROR_INT("isolated hole border point!", __func__, 1);
1009
1010 spx = npx; /* save location of second pixel on border */
1011 spy = npy;
1012 ptaAddPt(pta, npx, npy); /* second pixel */
1013 px = npx;
1014 py = npy;
1015
1016 while (1) {
1017 findNextBorderPixel(w, h, data, wpl, px, py, &qpos, &npx, &npy);
1018 if (px == fpx && py == fpy && npx == spx && npy == spy)
1019 break;
1020 ptaAddPt(pta, npx, npy);
1021 px = npx;
1022 py = npy;
1023 }
1024
1025 return 0;
1026}
1027
1028
1047static l_int32
1048findNextBorderPixel(l_int32 w,
1049 l_int32 h,
1050 l_uint32 *data,
1051 l_int32 wpl,
1052 l_int32 px,
1053 l_int32 py,
1054 l_int32 *pqpos,
1055 l_int32 *pnpx,
1056 l_int32 *pnpy)
1057{
1058l_int32 qpos, i, pos, npx, npy, val;
1059l_uint32 *line;
1060
1061 qpos = *pqpos;
1062 for (i = 1; i < 8; i++) {
1063 pos = (qpos + i) % 8;
1064 npx = px + xpostab[pos];
1065 npy = py + ypostab[pos];
1066 if (npx < 0 || npx >= w || npy < 0 || npy >= h)
1067 continue;
1068 line = data + npy * wpl;
1069 val = GET_DATA_BIT(line, npx);
1070 if (val) {
1071 *pnpx = npx;
1072 *pnpy = npy;
1073 *pqpos = qpostab[pos];
1074 return 0;
1075 }
1076 }
1077
1078 return 1;
1079}
1080
1081
1100static void
1101locateOutsideSeedPixel(l_int32 fpx,
1102 l_int32 fpy,
1103 l_int32 spx,
1104 l_int32 spy,
1105 l_int32 *pxs,
1106 l_int32 *pys)
1107{
1108l_int32 dx, dy;
1109
1110 dx = spx - fpx;
1111 dy = spy - fpy;
1112
1113 if (dx * dy == 1) {
1114 *pxs = fpx + dx;
1115 *pys = fpy;
1116 } else if (dx * dy == -1) {
1117 *pxs = fpx;
1118 *pys = fpy + dy;
1119 } else if (dx == 0) {
1120 *pxs = fpx + dy;
1121 *pys = fpy + dy;
1122 } else /* dy == 0 */ {
1123 *pxs = fpx + dx;
1124 *pys = fpy - dx;
1125 }
1126
1127 return;
1128}
1129
1130
1131
1132/*---------------------------------------------------------------------*
1133 * Border conversions *
1134 *---------------------------------------------------------------------*/
1148l_ok
1149ccbaGenerateGlobalLocs(CCBORDA *ccba)
1150{
1151l_int32 ncc, nb, n, i, j, k, xul, yul, x, y;
1152CCBORD *ccb;
1153PTAA *ptaal, *ptaag;
1154PTA *ptal, *ptag;
1155
1156 if (!ccba)
1157 return ERROR_INT("ccba not defined", __func__, 1);
1158
1159 ncc = ccbaGetCount(ccba); /* number of c.c. */
1160 for (i = 0; i < ncc; i++) {
1161 ccb = ccbaGetCcb(ccba, i);
1162
1163 /* Get the UL corner in global coords, (xul, yul), of the c.c. */
1164 boxaGetBoxGeometry(ccb->boxa, 0, &xul, &yul, NULL, NULL);
1165
1166 /* Make a new global ptaa, removing any old one */
1167 ptaal = ccb->local;
1168 nb = ptaaGetCount(ptaal); /* number of borders */
1169 if (ccb->global) /* remove old one */
1170 ptaaDestroy(&ccb->global);
1171 if ((ptaag = ptaaCreate(nb)) == NULL) {
1172 ccbDestroy(&ccb);
1173 return ERROR_INT("ptaag not made", __func__, 1);
1174 }
1175 ccb->global = ptaag; /* save new one */
1176
1177 /* Iterate through the borders for this c.c. */
1178 for (j = 0; j < nb; j++) {
1179 ptal = ptaaGetPta(ptaal, j, L_CLONE);
1180 n = ptaGetCount(ptal); /* number of pixels in border */
1181 ptag = ptaCreate(n);
1182 ptaaAddPta(ptaag, ptag, L_INSERT);
1183 for (k = 0; k < n; k++) {
1184 ptaGetIPt(ptal, k, &x, &y);
1185 ptaAddPt(ptag, x + xul, y + yul);
1186 }
1187 ptaDestroy(&ptal);
1188 }
1189 ccbDestroy(&ccb);
1190 }
1191
1192 return 0;
1193}
1194
1195
1218l_ok
1219ccbaGenerateStepChains(CCBORDA *ccba)
1220{
1221l_int32 ncc, nb, n, i, j, k;
1222l_int32 px, py, cx, cy, stepdir;
1223l_int32 dirtab[][3] = {{1, 2, 3}, {0, -1, 4}, {7, 6, 5}};
1224CCBORD *ccb;
1225NUMA *na;
1226NUMAA *naa; /* step chain code; to be made */
1227PTA *ptal;
1228PTAA *ptaal; /* local chain code */
1229
1230 if (!ccba)
1231 return ERROR_INT("ccba not defined", __func__, 1);
1232
1233 ncc = ccbaGetCount(ccba); /* number of c.c. */
1234 for (i = 0; i < ncc; i++) {
1235 ccb = ccbaGetCcb(ccba, i);
1236
1237 /* Make a new step numaa, removing any old one */
1238 ptaal = ccb->local;
1239 nb = ptaaGetCount(ptaal); /* number of borders */
1240 if (ccb->step) /* remove old one */
1241 numaaDestroy(&ccb->step);
1242 if ((naa = numaaCreate(nb)) == NULL) {
1243 ccbDestroy(&ccb);
1244 return ERROR_INT("naa not made", __func__, 1);
1245 }
1246 ccb->step = naa; /* save new one */
1247
1248 /* Iterate through the borders for this c.c. */
1249 for (j = 0; j < nb; j++) {
1250 ptal = ptaaGetPta(ptaal, j, L_CLONE);
1251 n = ptaGetCount(ptal); /* number of pixels in border */
1252 if (n == 1) { /* isolated pixel */
1253 na = numaCreate(1); /* but leave it empty */
1254 } else { /* trace out the boundary */
1255 na = numaCreate(n);
1256 ptaGetIPt(ptal, 0, &px, &py);
1257 for (k = 1; k < n; k++) {
1258 ptaGetIPt(ptal, k, &cx, &cy);
1259 stepdir = dirtab[1 + cy - py][1 + cx - px];
1260 numaAddNumber(na, stepdir);
1261 px = cx;
1262 py = cy;
1263 }
1264 }
1265 numaaAddNuma(naa, na, L_INSERT);
1266 ptaDestroy(&ptal);
1267 }
1268 ccbDestroy(&ccb); /* just decrement refcount */
1269 }
1270
1271 return 0;
1272}
1273
1274
1291l_ok
1292ccbaStepChainsToPixCoords(CCBORDA *ccba,
1293 l_int32 coordtype)
1294{
1295l_int32 ncc, nb, n, i, j, k;
1296l_int32 xul, yul, xstart, ystart, x, y, stepdir;
1297BOXA *boxa;
1298CCBORD *ccb;
1299NUMA *na;
1300NUMAA *naa;
1301PTAA *ptaan; /* new pix coord ptaa */
1302PTA *ptas, *ptan;
1303
1304 if (!ccba)
1305 return ERROR_INT("ccba not defined", __func__, 1);
1306 if (coordtype != CCB_GLOBAL_COORDS && coordtype != CCB_LOCAL_COORDS)
1307 return ERROR_INT("coordtype not valid", __func__, 1);
1308
1309 ncc = ccbaGetCount(ccba); /* number of c.c. */
1310 for (i = 0; i < ncc; i++) {
1311 ccb = ccbaGetCcb(ccba, i);
1312 if ((naa = ccb->step) == NULL) {
1313 ccbDestroy(&ccb);
1314 return ERROR_INT("step numaa not found", __func__, 1);
1315 } if ((boxa = ccb->boxa) == NULL) {
1316 ccbDestroy(&ccb);
1317 return ERROR_INT("boxa not found", __func__, 1);
1318 } if ((ptas = ccb->start) == NULL) {
1319 ccbDestroy(&ccb);
1320 return ERROR_INT("start pta not found", __func__, 1);
1321 }
1322
1323 /* For global coords, get the (xul, yul) of the c.c.;
1324 * otherwise, use relative coords. */
1325 if (coordtype == CCB_LOCAL_COORDS) {
1326 xul = 0;
1327 yul = 0;
1328 } else { /* coordtype == CCB_GLOBAL_COORDS */
1329 /* Get UL corner in global coords */
1330 if (boxaGetBoxGeometry(boxa, 0, &xul, &yul, NULL, NULL)) {
1331 ccbDestroy(&ccb);
1332 return ERROR_INT("bounding rectangle not found", __func__, 1);
1333 }
1334 }
1335
1336 /* Make a new ptaa, removing any old one */
1337 nb = numaaGetCount(naa); /* number of borders */
1338 if ((ptaan = ptaaCreate(nb)) == NULL) {
1339 ccbDestroy(&ccb);
1340 return ERROR_INT("ptaan not made", __func__, 1);
1341 }
1342 if (coordtype == CCB_LOCAL_COORDS) {
1343 if (ccb->local) /* remove old one */
1344 ptaaDestroy(&ccb->local);
1345 ccb->local = ptaan; /* save new local chain */
1346 } else { /* coordtype == CCB_GLOBAL_COORDS */
1347 if (ccb->global) /* remove old one */
1348 ptaaDestroy(&ccb->global);
1349 ccb->global = ptaan; /* save new global chain */
1350 }
1351
1352 /* Iterate through the borders for this c.c. */
1353 for (j = 0; j < nb; j++) {
1354 na = numaaGetNuma(naa, j, L_CLONE);
1355 n = numaGetCount(na); /* number of steps in border */
1356 if ((ptan = ptaCreate(n + 1)) == NULL) {
1357 ccbDestroy(&ccb);
1358 numaDestroy(&na);
1359 return ERROR_INT("ptan not made", __func__, 1);
1360 }
1361 ptaaAddPta(ptaan, ptan, L_INSERT);
1362 ptaGetIPt(ptas, j, &xstart, &ystart);
1363 x = xul + xstart;
1364 y = yul + ystart;
1365 ptaAddPt(ptan, x, y);
1366 for (k = 0; k < n; k++) {
1367 numaGetIValue(na, k, &stepdir);
1368 x += xpostab[stepdir];
1369 y += ypostab[stepdir];
1370 ptaAddPt(ptan, x, y);
1371 }
1372 numaDestroy(&na);
1373 }
1374 ccbDestroy(&ccb);
1375 }
1376
1377 return 0;
1378}
1379
1380
1400l_ok
1401ccbaGenerateSPGlobalLocs(CCBORDA *ccba,
1402 l_int32 ptsflag)
1403{
1404l_int32 ncc, npt, i, j, xul, yul, x, y, delx, dely;
1405l_int32 xp, yp, delxp, delyp; /* prev point and increments */
1406CCBORD *ccb;
1407PTA *ptal, *ptag;
1408
1409 if (!ccba)
1410 return ERROR_INT("ccba not defined", __func__, 1);
1411
1412 /* Make sure we have a local single path representation */
1413 if ((ccb = ccbaGetCcb(ccba, 0)) == NULL)
1414 return ERROR_INT("no ccb", __func__, 1);
1415 if (!ccb->splocal)
1416 ccbaGenerateSinglePath(ccba);
1417 ccbDestroy(&ccb); /* clone ref */
1418
1419 ncc = ccbaGetCount(ccba); /* number of c.c. */
1420 for (i = 0; i < ncc; i++) {
1421 ccb = ccbaGetCcb(ccba, i);
1422
1423 /* Get the UL corner in global coords, (xul, yul), of the c.c. */
1424 if (boxaGetBoxGeometry(ccb->boxa, 0, &xul, &yul, NULL, NULL)) {
1425 ccbDestroy(&ccb);
1426 return ERROR_INT("bounding rectangle not found", __func__, 1);
1427 }
1428
1429 /* Make a new spglobal pta, removing any old one */
1430 ptal = ccb->splocal;
1431 npt = ptaGetCount(ptal); /* number of points */
1432 if (ccb->spglobal) /* remove old one */
1433 ptaDestroy(&ccb->spglobal);
1434 if ((ptag = ptaCreate(npt)) == NULL) {
1435 ccbDestroy(&ccb);
1436 return ERROR_INT("ptag not made", __func__, 1);
1437 }
1438 ccb->spglobal = ptag; /* save new one */
1439
1440 /* Convert local to global */
1441 if (ptsflag == CCB_SAVE_ALL_PTS) {
1442 for (j = 0; j < npt; j++) {
1443 ptaGetIPt(ptal, j, &x, &y);
1444 ptaAddPt(ptag, x + xul, y + yul);
1445 }
1446 } else { /* ptsflag = CCB_SAVE_TURNING_PTS */
1447 ptaGetIPt(ptal, 0, &xp, &yp); /* get the 1st pt */
1448 ptaAddPt(ptag, xp + xul, yp + yul); /* save the 1st pt */
1449 if (npt == 2) { /* get and save the 2nd pt */
1450 ptaGetIPt(ptal, 1, &x, &y);
1451 ptaAddPt(ptag, x + xul, y + yul);
1452 } else if (npt > 2) {
1453 ptaGetIPt(ptal, 1, &x, &y);
1454 delxp = x - xp;
1455 delyp = y - yp;
1456 xp = x;
1457 yp = y;
1458 for (j = 2; j < npt; j++) {
1459 ptaGetIPt(ptal, j, &x, &y);
1460 delx = x - xp;
1461 dely = y - yp;
1462 if (delx != delxp || dely != delyp)
1463 ptaAddPt(ptag, xp + xul, yp + yul);
1464 xp = x;
1465 yp = y;
1466 delxp = delx;
1467 delyp = dely;
1468 }
1469 ptaAddPt(ptag, xp + xul, yp + yul);
1470 }
1471 }
1472
1473 ccbDestroy(&ccb); /* clone ref */
1474 }
1475
1476 return 0;
1477}
1478
1479
1480
1481/*---------------------------------------------------------------------*
1482 * Conversion to single path *
1483 *---------------------------------------------------------------------*/
1519l_ok
1520ccbaGenerateSinglePath(CCBORDA *ccba)
1521{
1522l_int32 i, j, k, ncc, nb, ncut, npt, dir, len, state, lostholes;
1523l_int32 x, y, xl, yl, xf, yf;
1524BOX *boxinner;
1525BOXA *boxa;
1526CCBORD *ccb;
1527PTA *pta, *ptac, *ptah;
1528PTA *ptahc; /* cyclic permutation of hole border, with end pts at cut */
1529PTA *ptas; /* output result: new single path for c.c. */
1530PTA *ptaf; /* points on the hole borders that intersect with cuts */
1531PTA *ptal; /* points on outer border that intersect with cuts */
1532PTA *ptap, *ptarp; /* path and reverse path between borders */
1533PTAA *ptaa;
1534PTAA *ptaap; /* ptaa for all paths between borders */
1535
1536 if (!ccba)
1537 return ERROR_INT("ccba not defined", __func__, 1);
1538
1539 ncc = ccbaGetCount(ccba); /* number of c.c. */
1540 lostholes = 0;
1541 for (i = 0; i < ncc; i++) {
1542 ccb = ccbaGetCcb(ccba, i);
1543 if ((ptaa = ccb->local) == NULL) {
1544 L_WARNING("local pixel loc array not found\n", __func__);
1545 continue;
1546 }
1547 nb = ptaaGetCount(ptaa); /* number of borders in the c.c. */
1548
1549 /* Prepare the output pta */
1550 if (ccb->splocal)
1551 ptaDestroy(&ccb->splocal);
1552 ptas = ptaCreate(0);
1553 ccb->splocal = ptas;
1554
1555 /* If no holes, just concat the outer border */
1556 pta = ptaaGetPta(ptaa, 0, L_CLONE);
1557 if (nb == 1 || nb > NMAX_HOLES + 1) {
1558 ptaJoin(ptas, pta, 0, -1);
1559 ptaDestroy(&pta); /* remove clone */
1560 ccbDestroy(&ccb); /* remove clone */
1561 continue;
1562 }
1563
1564 /* Find the (nb - 1) cut paths that connect holes
1565 * with outer border */
1566 boxa = ccb->boxa;
1567 ptaap = ptaaCreate(nb - 1);
1568 ptaf = ptaCreate(nb - 1);
1569 ptal = ptaCreate(nb - 1);
1570 for (j = 1; j < nb; j++) {
1571 boxinner = boxaGetBox(boxa, j, L_CLONE);
1572
1573 /* Find a short path and store it */
1574 ptac = getCutPathForHole(ccb->pix, pta, boxinner, &dir, &len);
1575 if (len == 0) { /* lost the hole */
1576 lostholes++;
1577/* boxPrintStreamInfo(stderr, boxa->box[0]); */
1578 }
1579 ptaaAddPta(ptaap, ptac, L_INSERT);
1580/* lept_stderr("dir = %d, length = %d\n", dir, len); */
1581/* ptaWriteStream(stderr, ptac, 1); */
1582
1583 /* Store the first and last points in the cut path,
1584 * which must be on a hole border and the outer
1585 * border, respectively */
1586 ncut = ptaGetCount(ptac);
1587 if (ncut == 0) { /* missed hole; neg coords won't match */
1588 ptaAddPt(ptaf, -1, -1);
1589 ptaAddPt(ptal, -1, -1);
1590 } else {
1591 ptaGetIPt(ptac, 0, &x, &y);
1592 ptaAddPt(ptaf, x, y);
1593 ptaGetIPt(ptac, ncut - 1, &x, &y);
1594 ptaAddPt(ptal, x, y);
1595 }
1596 boxDestroy(&boxinner);
1597 }
1598
1599 /* Make a single path for the c.c. using these connections */
1600 npt = ptaGetCount(pta); /* outer border pts */
1601 for (k = 0; k < npt; k++) {
1602 ptaGetIPt(pta, k, &x, &y);
1603 if (k == 0) { /* if there is a cut at the first point,
1604 * we can wait until the end to take it */
1605 ptaAddPt(ptas, x, y);
1606 continue;
1607 }
1608 state = L_NOT_FOUND;
1609 for (j = 0; j < nb - 1; j++) { /* iterate over cut end pts */
1610 ptaGetIPt(ptal, j, &xl, &yl); /* cut point on outer border */
1611 if (x == xl && y == yl) { /* take this cut to the hole */
1612 state = L_FOUND;
1613 ptap = ptaaGetPta(ptaap, j, L_CLONE);
1614 ptarp = ptaReverse(ptap, 1);
1615 /* Cut point on hole border: */
1616 ptaGetIPt(ptaf, j, &xf, &yf);
1617 /* Hole border: */
1618 ptah = ptaaGetPta(ptaa, j + 1, L_CLONE);
1619 ptahc = ptaCyclicPerm(ptah, xf, yf);
1620/* ptaWriteStream(stderr, ptahc, 1); */
1621 ptaJoin(ptas, ptarp, 0, -1);
1622 ptaJoin(ptas, ptahc, 0, -1);
1623 ptaJoin(ptas, ptap, 0, -1);
1624 ptaDestroy(&ptap);
1625 ptaDestroy(&ptarp);
1626 ptaDestroy(&ptah);
1627 ptaDestroy(&ptahc);
1628 break;
1629 }
1630 }
1631 if (state == L_NOT_FOUND)
1632 ptaAddPt(ptas, x, y);
1633 }
1634
1635/* ptaWriteStream(stderr, ptas, 1); */
1636 ptaaDestroy(&ptaap);
1637 ptaDestroy(&ptaf);
1638 ptaDestroy(&ptal);
1639 ptaDestroy(&pta); /* remove clone */
1640 ccbDestroy(&ccb); /* remove clone */
1641 }
1642
1643 if (lostholes > 0)
1644 L_INFO("***** %d lost holes *****\n", __func__, lostholes);
1645 return 0;
1646}
1647
1648
1675static PTA *
1676getCutPathForHole(PIX *pix,
1677 PTA *pta,
1678 BOX *boxinner,
1679 l_int32 *pdir,
1680 l_int32 *plen)
1681{
1682l_int32 w, h, nc, x, y, xl, yl, xmid, ymid;
1683l_uint32 val;
1684PTA *ptac;
1685
1686 if (!pix)
1687 return (PTA *)ERROR_PTR("pix not defined", __func__, NULL);
1688 if (!pta)
1689 return (PTA *)ERROR_PTR("pta not defined", __func__, NULL);
1690 if (!boxinner)
1691 return (PTA *)ERROR_PTR("boxinner not defined", __func__, NULL);
1692
1693 pixGetDimensions(pix, &w, &h, NULL);
1694 ptac = ptaCreate(4);
1695 xmid = boxinner->x + boxinner->w / 2;
1696 ymid = boxinner->y + boxinner->h / 2;
1697
1698 /* try top first */
1699 for (y = ymid; y >= 0; y--) {
1700 pixGetPixel(pix, xmid, y, &val);
1701 if (val == 1) {
1702 ptaAddPt(ptac, xmid, y);
1703 break;
1704 }
1705 }
1706 for (y = y - 1; y >= 0; y--) {
1707 pixGetPixel(pix, xmid, y, &val);
1708 if (val == 1)
1709 ptaAddPt(ptac, xmid, y);
1710 else
1711 break;
1712 }
1713 nc = ptaGetCount(ptac);
1714 ptaGetIPt(ptac, nc - 1, &xl, &yl);
1715 if (ptaContainsPt(pta, xl, yl)) {
1716 *pdir = 1;
1717 *plen = nc;
1718 return ptac;
1719 }
1720
1721 /* Next try bottom */
1722 ptaEmpty(ptac);
1723 for (y = ymid; y < h; y++) {
1724 pixGetPixel(pix, xmid, y, &val);
1725 if (val == 1) {
1726 ptaAddPt(ptac, xmid, y);
1727 break;
1728 }
1729 }
1730 for (y = y + 1; y < h; y++) {
1731 pixGetPixel(pix, xmid, y, &val);
1732 if (val == 1)
1733 ptaAddPt(ptac, xmid, y);
1734 else
1735 break;
1736 }
1737 nc = ptaGetCount(ptac);
1738 ptaGetIPt(ptac, nc - 1, &xl, &yl);
1739 if (ptaContainsPt(pta, xl, yl)) {
1740 *pdir = 3;
1741 *plen = nc;
1742 return ptac;
1743 }
1744
1745 /* Next try left */
1746 ptaEmpty(ptac);
1747 for (x = xmid; x >= 0; x--) {
1748 pixGetPixel(pix, x, ymid, &val);
1749 if (val == 1) {
1750 ptaAddPt(ptac, x, ymid);
1751 break;
1752 }
1753 }
1754 for (x = x - 1; x >= 0; x--) {
1755 pixGetPixel(pix, x, ymid, &val);
1756 if (val == 1)
1757 ptaAddPt(ptac, x, ymid);
1758 else
1759 break;
1760 }
1761 nc = ptaGetCount(ptac);
1762 ptaGetIPt(ptac, nc - 1, &xl, &yl);
1763 if (ptaContainsPt(pta, xl, yl)) {
1764 *pdir = 0;
1765 *plen = nc;
1766 return ptac;
1767 }
1768
1769 /* Finally try right */
1770 ptaEmpty(ptac);
1771 for (x = xmid; x < w; x++) {
1772 pixGetPixel(pix, x, ymid, &val);
1773 if (val == 1) {
1774 ptaAddPt(ptac, x, ymid);
1775 break;
1776 }
1777 }
1778 for (x = x + 1; x < w; x++) {
1779 pixGetPixel(pix, x, ymid, &val);
1780 if (val == 1)
1781 ptaAddPt(ptac, x, ymid);
1782 else
1783 break;
1784 }
1785 nc = ptaGetCount(ptac);
1786 ptaGetIPt(ptac, nc - 1, &xl, &yl);
1787 if (ptaContainsPt(pta, xl, yl)) {
1788 *pdir = 2;
1789 *plen = nc;
1790 return ptac;
1791 }
1792
1793 /* Sometimes, there is nothing. */
1794 ptaEmpty(ptac);
1795 *plen = 0;
1796 return ptac;
1797}
1798
1799
1800
1801/*---------------------------------------------------------------------*
1802 * Border rendering *
1803 *---------------------------------------------------------------------*/
1817PIX *
1818ccbaDisplayBorder(CCBORDA *ccba)
1819{
1820l_int32 ncc, nb, n, i, j, k, x, y;
1821CCBORD *ccb;
1822PIX *pixd;
1823PTAA *ptaa;
1824PTA *pta;
1825
1826 if (!ccba)
1827 return (PIX *)ERROR_PTR("ccba not defined", __func__, NULL);
1828
1829 if ((pixd = pixCreate(ccba->w, ccba->h, 1)) == NULL)
1830 return (PIX *)ERROR_PTR("pixd not made", __func__, NULL);
1831 ncc = ccbaGetCount(ccba); /* number of c.c. */
1832 for (i = 0; i < ncc; i++) {
1833 ccb = ccbaGetCcb(ccba, i);
1834 if ((ptaa = ccb->global) == NULL) {
1835 L_WARNING("global pixel loc array not found", __func__);
1836 ccbDestroy(&ccb);
1837 continue;
1838 }
1839 nb = ptaaGetCount(ptaa); /* number of borders in the c.c. */
1840 for (j = 0; j < nb; j++) {
1841 pta = ptaaGetPta(ptaa, j, L_CLONE);
1842 n = ptaGetCount(pta); /* number of pixels in the border */
1843 for (k = 0; k < n; k++) {
1844 ptaGetIPt(pta, k, &x, &y);
1845 pixSetPixel(pixd, x, y, 1);
1846 }
1847 ptaDestroy(&pta);
1848 }
1849 ccbDestroy(&ccb);
1850 }
1851
1852 return pixd;
1853}
1854
1855
1869PIX *
1870ccbaDisplaySPBorder(CCBORDA *ccba)
1871{
1872l_int32 ncc, npt, i, j, x, y;
1873CCBORD *ccb;
1874PIX *pixd;
1875PTA *ptag;
1876
1877 if (!ccba)
1878 return (PIX *)ERROR_PTR("ccba not defined", __func__, NULL);
1879
1880 if ((pixd = pixCreate(ccba->w, ccba->h, 1)) == NULL)
1881 return (PIX *)ERROR_PTR("pixd not made", __func__, NULL);
1882 ncc = ccbaGetCount(ccba); /* number of c.c. */
1883 for (i = 0; i < ncc; i++) {
1884 ccb = ccbaGetCcb(ccba, i);
1885 if ((ptag = ccb->spglobal) == NULL) {
1886 L_WARNING("spglobal pixel loc array not found\n", __func__);
1887 ccbDestroy(&ccb);
1888 continue;
1889 }
1890 npt = ptaGetCount(ptag); /* number of pixels on path */
1891 for (j = 0; j < npt; j++) {
1892 ptaGetIPt(ptag, j, &x, &y);
1893 pixSetPixel(pixd, x, y, 1);
1894 }
1895 ccbDestroy(&ccb); /* clone ref */
1896 }
1897
1898 return pixd;
1899}
1900
1901
1958PIX *
1959ccbaDisplayImage1(CCBORDA *ccba)
1960{
1961l_int32 ncc, i, nb, n, j, k, x, y, xul, yul, xoff, yoff, w, h;
1962l_int32 fpx, fpy, spx, spy, xs, ys;
1963BOX *box;
1964BOXA *boxa;
1965CCBORD *ccb;
1966PIX *pixd, *pixt, *pixh;
1967PTAA *ptaa;
1968PTA *pta;
1969
1970 if (!ccba)
1971 return (PIX *)ERROR_PTR("ccba not defined", __func__, NULL);
1972
1973 if ((pixd = pixCreate(ccba->w, ccba->h, 1)) == NULL)
1974 return (PIX *)ERROR_PTR("pixd not made", __func__, NULL);
1975 ncc = ccbaGetCount(ccba);
1976 for (i = 0; i < ncc; i++) {
1977 ccb = ccbaGetCcb(ccba, i);
1978 if ((boxa = ccb->boxa) == NULL) {
1979 pixDestroy(&pixd);
1980 ccbDestroy(&ccb);
1981 return (PIX *)ERROR_PTR("boxa not found", __func__, NULL);
1982 }
1983
1984 /* Render border in pixt */
1985 if ((ptaa = ccb->local) == NULL) {
1986 L_WARNING("local chain array not found\n", __func__);
1987 ccbDestroy(&ccb);
1988 continue;
1989 }
1990
1991 nb = ptaaGetCount(ptaa); /* number of borders in the c.c. */
1992 for (j = 0; j < nb; j++) {
1993 if ((box = boxaGetBox(boxa, j, L_CLONE)) == NULL) {
1994 pixDestroy(&pixd);
1995 ccbDestroy(&ccb);
1996 return (PIX *)ERROR_PTR("b. box not found", __func__, NULL);
1997 }
1998 if (j == 0) {
1999 boxGetGeometry(box, &xul, &yul, &w, &h);
2000 xoff = yoff = 0;
2001 } else {
2002 boxGetGeometry(box, &xoff, &yoff, &w, &h);
2003 }
2004 boxDestroy(&box);
2005
2006 /* Render the border in a minimum-sized pix;
2007 * subtract xoff and yoff because the pixel
2008 * location is stored relative to the c.c., but
2009 * we need it relative to just the hole border. */
2010 if ((pixt = pixCreate(w, h, 1)) == NULL) {
2011 pixDestroy(&pixd);
2012 ccbDestroy(&ccb);
2013 return (PIX *)ERROR_PTR("pixt not made", __func__, NULL);
2014 }
2015 pta = ptaaGetPta(ptaa, j, L_CLONE);
2016 n = ptaGetCount(pta); /* number of pixels in the border */
2017 for (k = 0; k < n; k++) {
2018 ptaGetIPt(pta, k, &x, &y);
2019 pixSetPixel(pixt, x - xoff, y - yoff, 1);
2020 if (j > 0) { /* need this for finding hole border pixel */
2021 if (k == 0) {
2022 fpx = x - xoff;
2023 fpy = y - yoff;
2024 }
2025 if (k == 1) {
2026 spx = x - xoff;
2027 spy = y - yoff;
2028 }
2029 }
2030 }
2031 ptaDestroy(&pta);
2032
2033 /* Get the filled component */
2034 if (j == 0) { /* if outer border, fill from outer boundary */
2035 if ((pixh = pixFillClosedBorders(pixt, 4)) == NULL) {
2036 pixDestroy(&pixd);
2037 pixDestroy(&pixt);
2038 ccbDestroy(&ccb);
2039 return (PIX *)ERROR_PTR("pixh not made", __func__, NULL);
2040 }
2041 } else { /* fill the hole from inside */
2042 /* get the location of a seed pixel in the hole */
2043 locateOutsideSeedPixel(fpx, fpy, spx, spy, &xs, &ys);
2044
2045 /* Put seed in hole and fill interior of hole,
2046 * using pixt as clipping mask */
2047 pixh = pixCreateTemplate(pixt);
2048 pixSetPixel(pixh, xs, ys, 1); /* put seed pixel in hole */
2049 pixInvert(pixt, pixt); /* to make filling mask */
2050 pixSeedfillBinary(pixh, pixh, pixt, 4); /* 4-fill hole */
2051 }
2052
2053 /* XOR into the dest */
2054 pixRasterop(pixd, xul + xoff, yul + yoff, w, h, PIX_XOR,
2055 pixh, 0, 0);
2056 pixDestroy(&pixt);
2057 pixDestroy(&pixh);
2058 }
2059 ccbDestroy(&ccb);
2060 }
2061 return pixd;
2062}
2063
2064
2065
2087PIX *
2088ccbaDisplayImage2(CCBORDA *ccba)
2089{
2090l_int32 ncc, nb, n, i, j, k, x, y, xul, yul, w, h;
2091l_int32 fpx, fpy, spx, spy, xs, ys;
2092BOXA *boxa;
2093CCBORD *ccb;
2094PIX *pixd, *pixc, *pixs;
2095PTAA *ptaa;
2096PTA *pta;
2097
2098 if (!ccba)
2099 return (PIX *)ERROR_PTR("ccba not defined", __func__, NULL);
2100
2101 if ((pixd = pixCreate(ccba->w, ccba->h, 1)) == NULL)
2102 return (PIX *)ERROR_PTR("pixd not made", __func__, NULL);
2103 ncc = ccbaGetCount(ccba);
2104 for (i = 0; i < ncc; i++) {
2105 /* Generate clipping mask from border pixels and seed image
2106 * from one seed for each closed border. */
2107 ccb = ccbaGetCcb(ccba, i);
2108 if ((boxa = ccb->boxa) == NULL) {
2109 pixDestroy(&pixd);
2110 ccbDestroy(&ccb);
2111 return (PIX *)ERROR_PTR("boxa not found", __func__, NULL);
2112 }
2113 if (boxaGetBoxGeometry(boxa, 0, &xul, &yul, &w, &h)) {
2114 pixDestroy(&pixd);
2115 ccbDestroy(&ccb);
2116 return (PIX *)ERROR_PTR("b. box not found", __func__, NULL);
2117 }
2118 pixc = pixCreate(w + 2, h + 2, 1);
2119 pixs = pixCreateTemplate(pixc);
2120
2121 if ((ptaa = ccb->local) == NULL) {
2122 pixDestroy(&pixc);
2123 pixDestroy(&pixs);
2124 ccbDestroy(&ccb);
2125 L_WARNING("local chain array not found\n", __func__);
2126 continue;
2127 }
2128 nb = ptaaGetCount(ptaa); /* number of borders in the c.c. */
2129 for (j = 0; j < nb; j++) {
2130 pta = ptaaGetPta(ptaa, j, L_CLONE);
2131 n = ptaGetCount(pta); /* number of pixels in the border */
2132
2133 /* Render border pixels in pixc */
2134 for (k = 0; k < n; k++) {
2135 ptaGetIPt(pta, k, &x, &y);
2136 pixSetPixel(pixc, x + 1, y + 1, 1);
2137 if (k == 0) {
2138 fpx = x + 1;
2139 fpy = y + 1;
2140 } else if (k == 1) {
2141 spx = x + 1;
2142 spy = y + 1;
2143 }
2144 }
2145
2146 /* Get and set seed pixel for this border in pixs */
2147 if (n > 1)
2148 locateOutsideSeedPixel(fpx, fpy, spx, spy, &xs, &ys);
2149 else /* isolated c.c. */
2150 xs = ys = 0;
2151 pixSetPixel(pixs, xs, ys, 1);
2152 ptaDestroy(&pta);
2153 }
2154
2155 /* Fill from seeds in pixs, using pixc as the clipping mask,
2156 * to reconstruct the c.c. */
2157 pixInvert(pixc, pixc); /* to convert clipping -> filling mask */
2158 pixSeedfillBinary(pixs, pixs, pixc, 4); /* 4-fill */
2159 pixInvert(pixs, pixs); /* to make the c.c. */
2160
2161 /* XOR into the dest */
2162 pixRasterop(pixd, xul, yul, w, h, PIX_XOR, pixs, 1, 1);
2163
2164 pixDestroy(&pixc);
2165 pixDestroy(&pixs);
2166 ccbDestroy(&ccb); /* ref-counted */
2167 }
2168 return pixd;
2169}
2170
2171
2172/*---------------------------------------------------------------------*
2173 * Serialize for I/O *
2174 *---------------------------------------------------------------------*/
2182l_ok
2183ccbaWrite(const char *filename,
2184 CCBORDA *ccba)
2185{
2186FILE *fp;
2187
2188 if (!filename)
2189 return ERROR_INT("filename not defined", __func__, 1);
2190 if (!ccba)
2191 return ERROR_INT("ccba not defined", __func__, 1);
2192
2193 if ((fp = fopenWriteStream(filename, "wb+")) == NULL)
2194 return ERROR_INT_1("stream not opened", filename, __func__, 1);
2195 if (ccbaWriteStream(fp, ccba)) {
2196 fclose(fp);
2197 return ERROR_INT_1("ccba not written to stream", filename, __func__, 1);
2198 }
2199
2200 fclose(fp);
2201 return 0;
2202}
2203
2204
2205
2232l_ok
2233ccbaWriteStream(FILE *fp,
2234 CCBORDA *ccba)
2235{
2236char strbuf[256];
2237l_uint8 bval;
2238l_uint8 *datain, *dataout;
2239l_int32 i, j, k, bx, by, bw, bh, val, startx, starty;
2240l_int32 ncc, nb, n;
2241l_uint32 w, h;
2242size_t inbytes, outbytes;
2243L_BBUFFER *bbuf;
2244CCBORD *ccb;
2245NUMA *na;
2246NUMAA *naa;
2247PTA *pta;
2248
2249#if !HAVE_LIBZ /* defined in environ.h */
2250 return ERROR_INT("no libz: can't write data", __func__, 1);
2251#else
2252
2253 if (!fp)
2254 return ERROR_INT("stream not open", __func__, 1);
2255 if (!ccba)
2256 return ERROR_INT("ccba not defined", __func__, 1);
2257
2258 if ((bbuf = bbufferCreate(NULL, 1000)) == NULL)
2259 return ERROR_INT("bbuf not made", __func__, 1);
2260
2261 ncc = ccbaGetCount(ccba);
2262 snprintf(strbuf, sizeof(strbuf), "ccba: %7d cc\n", ncc);
2263 bbufferRead(bbuf, (l_uint8 *)strbuf, 18);
2264 w = pixGetWidth(ccba->pix);
2265 h = pixGetHeight(ccba->pix);
2266 bbufferRead(bbuf, (l_uint8 *)&w, 4); /* width */
2267 bbufferRead(bbuf, (l_uint8 *)&h, 4); /* height */
2268 for (i = 0; i < ncc; i++) {
2269 ccb = ccbaGetCcb(ccba, i);
2270 if (boxaGetBoxGeometry(ccb->boxa, 0, &bx, &by, &bw, &bh)) {
2271 bbufferDestroy(&bbuf);
2272 ccbDestroy(&ccb);
2273 return ERROR_INT("bounding box not found", __func__, 1);
2274 }
2275 bbufferRead(bbuf, (l_uint8 *)&bx, 4); /* ulx of c.c. */
2276 bbufferRead(bbuf, (l_uint8 *)&by, 4); /* uly of c.c. */
2277 bbufferRead(bbuf, (l_uint8 *)&bw, 4); /* w of c.c. */
2278 bbufferRead(bbuf, (l_uint8 *)&bh, 4); /* h of c.c. */
2279 if ((naa = ccb->step) == NULL) {
2280 ccbaGenerateStepChains(ccba);
2281 naa = ccb->step;
2282 }
2283 nb = numaaGetCount(naa);
2284 bbufferRead(bbuf, (l_uint8 *)&nb, 4); /* number of borders in c.c. */
2285 pta = ccb->start;
2286 for (j = 0; j < nb; j++) {
2287 ptaGetIPt(pta, j, &startx, &starty);
2288 bbufferRead(bbuf, (l_uint8 *)&startx, 4); /* starting x in border */
2289 bbufferRead(bbuf, (l_uint8 *)&starty, 4); /* starting y in border */
2290 na = numaaGetNuma(naa, j, L_CLONE);
2291 n = numaGetCount(na);
2292 for (k = 0; k < n; k++) {
2293 numaGetIValue(na, k, &val);
2294 if (k % 2 == 0)
2295 bval = (l_uint8)val << 4;
2296 else
2297 bval |= (l_uint8)val;
2298 if (k % 2 == 1)
2299 bbufferRead(bbuf, (l_uint8 *)&bval, 1); /* 2 border steps */
2300 }
2301 if (n % 2 == 1) {
2302 bval |= 0x8;
2303 bbufferRead(bbuf, (l_uint8 *)&bval, 1); /* end with 0xz8, */
2304 /* where z = {0..7} */
2305 } else { /* n % 2 == 0 */
2306 bval = 0x88;
2307 bbufferRead(bbuf, (l_uint8 *)&bval, 1); /* end with 0x88 */
2308 }
2309 numaDestroy(&na);
2310 }
2311 ccbDestroy(&ccb);
2312 }
2313
2314 datain = bbufferDestroyAndSaveData(&bbuf, &inbytes);
2315 dataout = zlibCompress(datain, inbytes, &outbytes);
2316 fwrite(dataout, 1, outbytes, fp);
2317
2318 LEPT_FREE(datain);
2319 LEPT_FREE(dataout);
2320 return 0;
2321
2322#endif /* !HAVE_LIBZ */
2323}
2324
2325
2332CCBORDA *
2333ccbaRead(const char *filename)
2334{
2335FILE *fp;
2336CCBORDA *ccba;
2337
2338 if (!filename)
2339 return (CCBORDA *)ERROR_PTR("filename not defined", __func__, NULL);
2340
2341 if ((fp = fopenReadStream(filename)) == NULL)
2342 return (CCBORDA *)ERROR_PTR_1("stream not opened",
2343 filename, __func__, NULL);
2344 ccba = ccbaReadStream(fp);
2345 fclose(fp);
2346
2347 if (!ccba)
2348 return (CCBORDA *)ERROR_PTR_1("ccba not returned",
2349 filename, __func__, NULL);
2350 return ccba;
2351}
2352
2353
2378CCBORDA *
2379ccbaReadStream(FILE *fp)
2380{
2381char strbuf[256];
2382l_uint8 bval;
2383l_uint8 *datain, *dataout;
2384l_int32 i, j, startx, starty;
2385l_int32 offset, nib1, nib2;
2386l_int32 ncc, nb;
2387l_uint32 width, height, w, h, xoff, yoff;
2388size_t inbytes, outbytes;
2389BOX *box;
2390CCBORD *ccb;
2391CCBORDA *ccba;
2392NUMA *na;
2393NUMAA *step;
2394
2395#if !HAVE_LIBZ /* defined in environ.h */
2396 return (CCBORDA *)ERROR_PTR("no libz: can't read data", __func__, NULL);
2397#else
2398
2399 if (!fp)
2400 return (CCBORDA *)ERROR_PTR("stream not open", __func__, NULL);
2401
2402 if ((datain = l_binaryReadStream(fp, &inbytes)) == NULL)
2403 return (CCBORDA *)ERROR_PTR("data not read from file", __func__, NULL);
2404 dataout = zlibUncompress(datain, inbytes, &outbytes);
2405 LEPT_FREE(datain);
2406 if (!dataout)
2407 return (CCBORDA *)ERROR_PTR("dataout not made", __func__, NULL);
2408
2409 offset = 18;
2410 memcpy(strbuf, dataout, offset);
2411 strbuf[17] = '\0';
2412 if (memcmp(strbuf, "ccba:", 5) != 0) {
2413 LEPT_FREE(dataout);
2414 return (CCBORDA *)ERROR_PTR("file not type ccba", __func__, NULL);
2415 }
2416 sscanf(strbuf, "ccba: %7d cc\n", &ncc);
2417/* lept_stderr("ncc = %d\n", ncc); */
2418 if ((ccba = ccbaCreate(NULL, ncc)) == NULL) {
2419 LEPT_FREE(dataout);
2420 return (CCBORDA *)ERROR_PTR("ccba not made", __func__, NULL);
2421 }
2422
2423 memcpy(&width, dataout + offset, 4);
2424 offset += 4;
2425 memcpy(&height, dataout + offset, 4);
2426 offset += 4;
2427 ccba->w = width;
2428 ccba->h = height;
2429/* lept_stderr("width = %d, height = %d\n", width, height); */
2430
2431 for (i = 0; i < ncc; i++) { /* should be ncc */
2432 ccb = ccbCreate(NULL);
2433 ccbaAddCcb(ccba, ccb);
2434
2435 memcpy(&xoff, dataout + offset, 4);
2436 offset += 4;
2437 memcpy(&yoff, dataout + offset, 4);
2438 offset += 4;
2439 memcpy(&w, dataout + offset, 4);
2440 offset += 4;
2441 memcpy(&h, dataout + offset, 4);
2442 offset += 4;
2443 box = boxCreate(xoff, yoff, w, h);
2444 boxaAddBox(ccb->boxa, box, L_INSERT);
2445/* lept_stderr("xoff = %d, yoff = %d, w = %d, h = %d\n",
2446 xoff, yoff, w, h); */
2447
2448 memcpy(&nb, dataout + offset, 4);
2449 offset += 4;
2450/* lept_stderr("num borders = %d\n", nb); */
2451 step = numaaCreate(nb);
2452 ccb->step = step;
2453
2454 for (j = 0; j < nb; j++) { /* should be nb */
2455 memcpy(&startx, dataout + offset, 4);
2456 offset += 4;
2457 memcpy(&starty, dataout + offset, 4);
2458 offset += 4;
2459 ptaAddPt(ccb->start, startx, starty);
2460/* lept_stderr("startx = %d, starty = %d\n", startx, starty); */
2461 na = numaCreate(0);
2462 numaaAddNuma(step, na, L_INSERT);
2463
2464 while(1) {
2465 bval = *(dataout + offset);
2466 offset++;
2467 nib1 = (bval >> 4);
2468 nib2 = bval & 0xf;
2469 if (nib1 != 8)
2470 numaAddNumber(na, nib1);
2471 else
2472 break;
2473 if (nib2 != 8)
2474 numaAddNumber(na, nib2);
2475 else
2476 break;
2477 }
2478 }
2479 }
2480 LEPT_FREE(dataout);
2481 return ccba;
2482
2483#endif /* !HAVE_LIBZ */
2484}
2485
2486
2487/*---------------------------------------------------------------------*
2488 * SVG Output *
2489 *---------------------------------------------------------------------*/
2497l_ok
2498ccbaWriteSVG(const char *filename,
2499 CCBORDA *ccba)
2500{
2501char *svgstr;
2502
2503 if (!filename)
2504 return ERROR_INT("filename not defined", __func__, 1);
2505 if (!ccba)
2506 return ERROR_INT("ccba not defined", __func__, 1);
2507
2508 if ((svgstr = ccbaWriteSVGString(ccba)) == NULL)
2509 return ERROR_INT("svgstr not made", __func__, 1);
2510
2511 l_binaryWrite(filename, "w", svgstr, strlen(svgstr));
2512 LEPT_FREE(svgstr);
2513
2514 return 0;
2515}
2516
2517
2525char *
2526ccbaWriteSVGString(CCBORDA *ccba)
2527{
2528char *svgstr;
2529char smallbuf[256];
2530char line0[] = "<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>";
2531char line1[] = "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20000303 Stylable//EN\" \"http://www.w3.org/TR/2000/03/WD-SVG-20000303/DTD/svg-20000303-stylable.dtd\">";
2532char line2[] = "<svg>";
2533char line3[] = "<polygon style=\"stroke-width:1;stroke:black;\" points=\"";
2534char line4[] = "\" />";
2535char line5[] = "</svg>";
2536char space[] = " ";
2537l_int32 i, j, ncc, npt, x, y;
2538CCBORD *ccb;
2539PTA *pta;
2540SARRAY *sa;
2541
2542 if (!ccba)
2543 return (char *)ERROR_PTR("ccba not defined", __func__, NULL);
2544
2545 sa = sarrayCreate(0);
2546 sarrayAddString(sa, line0, L_COPY);
2547 sarrayAddString(sa, line1, L_COPY);
2548 sarrayAddString(sa, line2, L_COPY);
2549 ncc = ccbaGetCount(ccba);
2550 for (i = 0; i < ncc; i++) {
2551 if ((ccb = ccbaGetCcb(ccba, i)) == NULL) {
2552 sarrayDestroy(&sa);
2553 return (char *)ERROR_PTR("ccb not found", __func__, NULL);
2554 }
2555 if ((pta = ccb->spglobal) == NULL) {
2556 sarrayDestroy(&sa);
2557 ccbDestroy(&ccb);
2558 return (char *)ERROR_PTR("spglobal not made", __func__, NULL);
2559 }
2560 sarrayAddString(sa, line3, L_COPY);
2561 npt = ptaGetCount(pta);
2562 for (j = 0; j < npt; j++) {
2563 ptaGetIPt(pta, j, &x, &y);
2564 snprintf(smallbuf, sizeof(smallbuf), "%0d,%0d", x, y);
2565 sarrayAddString(sa, smallbuf, L_COPY);
2566 }
2567 sarrayAddString(sa, line4, L_COPY);
2568 ccbDestroy(&ccb);
2569 }
2570 sarrayAddString(sa, line5, L_COPY);
2571 sarrayAddString(sa, space, L_COPY);
2572
2573 svgstr = sarrayToString(sa, 1);
2574/* lept_stderr("%s", svgstr); */
2575
2576 sarrayDestroy(&sa);
2577 return svgstr;
2578}
GET_DATA_BIT
#define GET_DATA_BIT(pdata, n)
Definition arrayaccess.h:123
pixGetOuterBordersPtaa
PTAA * pixGetOuterBordersPtaa(PIX *pixs)
pixGetOuterBordersPtaa()
Definition ccbord.c:753
ccbaDisplayImage2
PIX * ccbaDisplayImage2(CCBORDA *ccba)
ccbaDisplayImage2()
Definition ccbord.c:2088
ccbaWriteSVG
l_ok ccbaWriteSVG(const char *filename, CCBORDA *ccba)
ccbaWriteSVG()
Definition ccbord.c:2498
ccbaWriteSVGString
char * ccbaWriteSVGString(CCBORDA *ccba)
ccbaWriteSVGString()
Definition ccbord.c:2526
ccbaDestroy
void ccbaDestroy(CCBORDA **pccba)
ccbaDestroy()
Definition ccbord.c:350
ccbaRead
CCBORDA * ccbaRead(const char *filename)
ccbaRead()
Definition ccbord.c:2333
pixGetOuterBorder
l_ok pixGetOuterBorder(CCBORD *ccb, PIX *pixs, BOX *box)
pixGetOuterBorder()
Definition ccbord.c:882
ccbaGenerateSinglePath
l_ok ccbaGenerateSinglePath(CCBORDA *ccba)
ccbaGenerateSinglePath()
Definition ccbord.c:1520
findNextBorderPixel
static l_int32 findNextBorderPixel(l_int32 w, l_int32 h, l_uint32 *data, l_int32 wpl, l_int32 px, l_int32 py, l_int32 *pqpos, l_int32 *pnpx, l_int32 *pnpy)
findNextBorderPixel()
Definition ccbord.c:1048
ccbaGetCcb
static CCBORD * ccbaGetCcb(CCBORDA *ccba, l_int32 index)
ccbaGetCcb()
Definition ccbord.c:533
ccbaDisplayBorder
PIX * ccbaDisplayBorder(CCBORDA *ccba)
ccbaDisplayBorder()
Definition ccbord.c:1818
ccbaWrite
l_ok ccbaWrite(const char *filename, CCBORDA *ccba)
ccbaWrite()
Definition ccbord.c:2183
ccbaDisplaySPBorder
PIX * ccbaDisplaySPBorder(CCBORDA *ccba)
ccbaDisplaySPBorder()
Definition ccbord.c:1870
ccbaGetCount
static l_int32 ccbaGetCount(CCBORDA *ccba)
ccbaGetCount()
Definition ccbord.c:510
ccbaStepChainsToPixCoords
l_ok ccbaStepChainsToPixCoords(CCBORDA *ccba, l_int32 coordtype)
ccbaStepChainsToPixCoords()
Definition ccbord.c:1292
ccbaDisplayImage1
PIX * ccbaDisplayImage1(CCBORDA *ccba)
ccbaDisplayImage1()
Definition ccbord.c:1959
ccbaGenerateGlobalLocs
l_ok ccbaGenerateGlobalLocs(CCBORDA *ccba)
ccbaGenerateGlobalLocs()
Definition ccbord.c:1149
ccbaCreate
static CCBORDA * ccbaCreate(PIX *pixs, l_int32 n)
ccbaCreate()
Definition ccbord.c:319
pixGetOuterBorderPta
static PTA * pixGetOuterBorderPta(PIX *pixs, BOX *box)
pixGetOuterBorderPta()
Definition ccbord.c:811
pixGetCCBorders
static CCBORD * pixGetCCBorders(PIX *pixs, BOX *box)
pixGetCCBorders()
Definition ccbord.c:644
ccbaGenerateStepChains
l_ok ccbaGenerateStepChains(CCBORDA *ccba)
ccbaGenerateStepChains()
Definition ccbord.c:1219
ccbaReadStream
CCBORDA * ccbaReadStream(FILE *fp)
ccbaReadStream()
Definition ccbord.c:2379
pixGetAllCCBorders
CCBORDA * pixGetAllCCBorders(PIX *pixs)
pixGetAllCCBorders()
Definition ccbord.c:560
pixGetHoleBorder
static l_ok pixGetHoleBorder(CCBORD *ccb, PIX *pixs, BOX *box, l_int32 xs, l_int32 ys)
pixGetHoleBorder()
Definition ccbord.c:968
ccbDestroy
static void ccbDestroy(CCBORD **pccb)
ccbDestroy()
Definition ccbord.c:410
ccbaExtendArray
static l_int32 ccbaExtendArray(CCBORDA *ccba)
ccbaExtendArray()
Definition ccbord.c:484
ccbaGenerateSPGlobalLocs
l_ok ccbaGenerateSPGlobalLocs(CCBORDA *ccba, l_int32 ptsflag)
ccbaGenerateSPGlobalLocs()
Definition ccbord.c:1401
ccbaAddCcb
static l_ok ccbaAddCcb(CCBORDA *ccba, CCBORD *ccb)
ccbaAddCcb()
Definition ccbord.c:456
ccbaWriteStream
l_ok ccbaWriteStream(FILE *fp, CCBORDA *ccba)
ccbaWriteStream()
Definition ccbord.c:2233
ccbCreate
static CCBORD * ccbCreate(PIX *pixs)
ccbCreate()
Definition ccbord.c:379
getCutPathForHole
static PTA * getCutPathForHole(PIX *pix, PTA *pta, BOX *boxinner, l_int32 *pdir, l_int32 *plen)
getCutPathForHole()
Definition ccbord.c:1676
locateOutsideSeedPixel
static void locateOutsideSeedPixel(l_int32 fpx, l_int32 fpy, l_int32 spx, l_int32 spy, l_int32 *pxs, l_int32 *pys)
locateOutsideSeedPixel()
Definition ccbord.c:1101
ccbord_internal.h
L_COPY
@ L_COPY
Definition pix.h:505
L_CLONE
@ L_CLONE
Definition pix.h:506
L_INSERT
@ L_INSERT
Definition pix.h:504
PIX_XOR
#define PIX_XOR
Definition pix.h:454
pix_internal.h
Box::y
l_int32 y
Definition pix_internal.h:258
Box::x
l_int32 x
Definition pix_internal.h:257
Box::w
l_int32 w
Definition pix_internal.h:259
Box::h
l_int32 h
Definition pix_internal.h:260
CCBord::global
struct Ptaa * global
Definition ccbord_internal.h:89
CCBord::spglobal
struct Pta * spglobal
Definition ccbord_internal.h:92
CCBord::step
struct Numaa * step
Definition ccbord_internal.h:90
CCBord::start
struct Pta * start
Definition ccbord_internal.h:86
CCBord::boxa
struct Boxa * boxa
Definition ccbord_internal.h:85
CCBord::pix
struct Pix * pix
Definition ccbord_internal.h:84
CCBord::refcount
l_atomic refcount
Definition ccbord_internal.h:87
CCBord::local
struct Ptaa * local
Definition ccbord_internal.h:88
CCBord::splocal
struct Pta * splocal
Definition ccbord_internal.h:91
CCBorda::w
l_int32 w
Definition ccbord_internal.h:99
CCBorda::nalloc
l_int32 nalloc
Definition ccbord_internal.h:102
CCBorda::ccb
struct CCBord ** ccb
Definition ccbord_internal.h:103
CCBorda::pix
struct Pix * pix
Definition ccbord_internal.h:98
L_ByteBuffer
Definition bbuffer.h:51