third-party/leptonica/prog/converttogray.c
/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
/*
* converttogray.c
*
*/
#include "allheaders.h"
int main(int argc,
char **argv)
{
char *filein;
char *fileout = NULL;
l_int32 d, same;
PIX *pixs, *pixd, *pix1, *pix2, *pix3, *pix4;
static char mainName[] = "converttogray";
if (argc != 2 && argc != 3)
return ERROR_INT(" Syntax: converttogray filein [fileout]",
mainName, 1);
filein = argv[1];
if (argc == 3) fileout = argv[2];
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
if (fileout) {
pixd = pixConvertRGBToGray(pixs, 0.33, 0.34, 0.33);
pixWrite(fileout, pixd, IFF_PNG);
pixDestroy(&pixs);
pixDestroy(&pixd);
return 0;
}
d = pixGetDepth(pixs);
if (d == 2) {
pix1 = pixConvert2To8(pixs, 0x00, 0x55, 0xaa, 0xff, TRUE);
pix2 = pixConvert2To8(pixs, 0x00, 0x55, 0xaa, 0xff, FALSE);
pixEqual(pix1, pix2, &same);
if (same)
fprintf(stderr, "images are the same\n");
else
fprintf(stderr, "images are different!\n");
pixWrite("/tmp/pix1.png", pix1, IFF_PNG);
pixWrite("/tmp/pix2.png", pix2, IFF_PNG);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixSetColormap(pixs, NULL);
pix3 = pixConvert2To8(pixs, 0x00, 0x55, 0xaa, 0xff, TRUE);
pix4 = pixConvert2To8(pixs, 0x00, 0x55, 0xaa, 0xff, FALSE);
pixEqual(pix3, pix4, &same);
if (same)
fprintf(stderr, "images are the same\n");
else
fprintf(stderr, "images are different!\n");
pixWrite("/tmp/pix3.png", pix3, IFF_PNG);
pixWrite("/tmp/pix4.png", pix4, IFF_PNG);
pixDestroy(&pix3);
pixDestroy(&pix4);
} else if (d == 4) {
pix1 = pixConvert4To8(pixs, TRUE);
pix2 = pixConvert4To8(pixs, FALSE);
pixEqual(pix1, pix2, &same);
if (same)
fprintf(stderr, "images are the same\n");
else
fprintf(stderr, "images are different!\n");
pixWrite("/tmp/pix1.png", pix1, IFF_PNG);
pixWrite("/tmp/pix2.png", pix2, IFF_PNG);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixSetColormap(pixs, NULL);
pix3 = pixConvert4To8(pixs, TRUE);
pix4 = pixConvert4To8(pixs, FALSE);
pixEqual(pix3, pix4, &same);
if (same)
fprintf(stderr, "images are the same\n");
else
fprintf(stderr, "images are different!\n");
pixWrite("/tmp/pix3.png", pix3, IFF_PNG);
pixWrite("/tmp/pix4.png", pix4, IFF_PNG);
pixDestroy(&pix3);
pixDestroy(&pix4);
} else {
L_INFO("only converts 2 and 4 bpp; d = %d\n", mainName, d);
}
pixDestroy(&pixs);
return 0;
}