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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* sheartest.c
*
* sheartest filein angle fileout
*
* where angle is expressed in degrees
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
#define NTIMES 10
main(int argc,
char **argv)
{
char *filein, *fileout;
l_int32 i, w, h, liney, linex, same;
l_float32 angle, deg2rad;
PIX *pixt1, *pixt2, *pixs, *pixd;
static char mainName[] = "sheartest";
if (argc != 4)
exit(ERROR_INT(" Syntax: sheartest filein angle fileout",
mainName, 1));
/* Compare in-place H shear with H shear to a new pix */
pixt1 = pixRead("marge.jpg");
pixGetDimensions(pixt1, &w, &h, NULL);
pixt2 = pixHShear(NULL, pixt1, (l_int32)(0.3 * h), 0.17, L_BRING_IN_WHITE);
pixHShearIP(pixt1, (l_int32)(0.3 * h), 0.17, L_BRING_IN_WHITE);
pixEqual(pixt1, pixt2, &same);
if (same)
fprintf(stderr, "Correct for H shear\n");
else
fprintf(stderr, "Error for H shear\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
/* Compare in-place V shear with V shear to a new pix */
pixt1 = pixRead("marge.jpg");
pixGetDimensions(pixt1, &w, &h, NULL);
pixt2 = pixVShear(NULL, pixt1, (l_int32)(0.3 * w), 0.17, L_BRING_IN_WHITE);
pixVShearIP(pixt1, (l_int32)(0.3 * w), 0.17, L_BRING_IN_WHITE);
pixEqual(pixt1, pixt2, &same);
if (same)
fprintf(stderr, "Correct for V shear\n");
else
fprintf(stderr, "Error for V shear\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
filein = argv[1];
angle = atof(argv[2]);
fileout = argv[3];
deg2rad = 3.1415926535 / 180.;
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pix not made", mainName, 1));
pixGetDimensions(pixs, &w, &h, NULL);
#if 0
/* Select an operation from this list ...
* ------------------------------------------
pixd = pixHShear(NULL, pixs, liney, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixVShear(NULL, pixs, linex, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixHShearCorner(NULL, pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixVShearCorner(NULL, pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixHShearCenter(NULL, pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixd = pixVShearCenter(NULL, pixs, deg2rad * angle, L_BRING_IN_WHITE);
pixHShearIP(pixs, liney, deg2rad * angle, L_BRING_IN_WHITE); pixd = pixs;
pixVShearIP(pixs, linex, deg2rad * angle, L_BRING_IN_WHITE); pixd = pixs;
pixRasteropHip(pixs, 0, h/3, -50, L_BRING_IN_WHITE); pixd = pixs;
pixRasteropVip(pixs, 0, w/3, -50, L_BRING_IN_WHITE); pixd = pixs;
* ------------------------------------------
* ... and use it in the following: */
pixd = pixHShear(NULL, pixs, liney, deg2rad * angle, L_BRING_IN_WHITE);
pixWrite(fileout, pixd, IFF_PNG);
pixDisplay(pixd, 50, 50);
pixDestroy(&pixd);
#endif
#if 0
/* Do a horizontal shear about a line */
for (i = 0; i < NTIMES; i++) {
liney = i * h / (NTIMES - 1);
if (liney >= h)
liney = h - 1;
pixd = pixHShear(NULL, pixs, liney, deg2rad * angle, L_BRING_IN_WHITE);
pixDisplay(pixd, 50 + 10 * i, 50 + 10 * i);
pixDestroy(&pixd);
}
#endif
#if 0
/* Do a vertical shear about a line */
for (i = 0; i < NTIMES; i++) {
linex = i * w / (NTIMES - 1);
if (linex >= w)
linex = w - 1;
pixd = pixVShear(NULL, pixs, linex, deg2rad * angle, L_BRING_IN_WHITE);
pixDisplay(pixd, 50 + 10 * i, 50 + 10 * i);
pixDestroy(&pixd);
}
#endif
#if 0
/* Do a horizontal in-place shear about a line */
pixSetPadBits(pixs, 0);
for (i = 0; i < NTIMES; i++) {
pixd = pixCopy(NULL, pixs);
liney = i * h / (NTIMES - 1);
if (liney >= h)
liney = h - 1;
pixHShearIP(pixd, liney, deg2rad * angle, L_BRING_IN_WHITE);
pixDisplay(pixd, 50 + 10 * i, 50 + 10 * i);
pixDestroy(&pixd);
}
#endif
#if 0
/* Do a vertical in-place shear about a line */
for (i = 0; i < NTIMES; i++) {
pixd = pixCopy(NULL, pixs);
linex = i * w / (NTIMES - 1);
if (linex >= w)
linex = w - 1;
pixVShearIP(pixd, linex, deg2rad * angle, L_BRING_IN_WHITE);
pixDisplay(pixd, 50 + 10 * i, 50 + 10 * i);
pixDestroy(&pixd);
}
#endif
pixDestroy(&pixs);
exit(0);
}
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