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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF. The full HDF copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF/releases/. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**************************************************************************
* hdf24hdf8 Quantizes a HDF RGB 24 bit "pixel" image into a 8 bit image
* with RGB palette and stores it as a HDF 8-bit raster image
* file.
*
* usage: hdf24hdf8 r24_file hdf8_file
*
* On Input:
* --------
*
* hdf24_file - File containing the HDF RGB 24-bit
* raster image.
*
* On Output:
* ---------
*
* hdf8_file - HDF file with one 8-bit raster image set,
* i.e. 8-bit image, dimensions, and
* RGB palette.
*
****************************************************************************/
typedef unsigned char UCHAR;
typedef unsigned int UINT;
#define NCOLORS 256
#define PALSIZE 3 * NCOLORS
#define COMPRESSION 0 /* no compression */
#include <stdio.h>
#include <stdlib.h>
#include "hdf.h"
#ifdef H4_HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#define USAGE fprintf(stderr, "usage: hdf24hdf8 hdf24_file hdf8_file\n")
int main(int, char *a[]);
int r24r8(int32, int32, unsigned char *, unsigned char *, int, unsigned char *);
int
main(int argc, char *argv[])
{
int i;
int32 x_dim, y_dim, size;
int interlace;
uint8 *r24, *r8, *pal;
uint8 hdfpal[PALSIZE], *p;
if (argc != 3) {
USAGE;
exit(1);
}
/* Get the HDF R24 image */
if (DF24getdims(argv[1], &x_dim, &y_dim, &interlace) < 0) {
fprintf(stderr, "error: %s is not an HDF file or ", argv[1]);
fprintf(stderr, "it does not contain a R24 image\n");
exit(-1);
}
size = x_dim * y_dim;
if ((r24 = (UCHAR *)malloc(size * 3)) == NULL) {
fprintf(stderr, "error: malloc to hold r24 image failed\n");
exit(-1);
}
if (DF24getimage(argv[1], (void *)r24, x_dim, y_dim) < 0) {
fprintf(stderr, "error: DF24getimage failed\n");
exit(-1);
}
if ((r8 = (UCHAR *)malloc(size)) == NULL) {
fprintf(stderr, "error: malloc to hold r8 image failed\n");
exit(-1);
}
if ((pal = (UCHAR *)malloc(PALSIZE)) == NULL) {
fprintf(stderr, "error: malloc to hold palette failed\n");
exit(-1);
}
if (r24r8(x_dim, y_dim, r24, r8, NCOLORS, pal) == -1) {
fprintf(stderr, "error: quantization failed\n");
exit(-1);
}
/* rearrange palette to conform to HDF requirements */
p = hdfpal;
for (i = 0; i < NCOLORS; i++) {
*p++ = pal[i];
*p++ = pal[i + NCOLORS];
*p++ = pal[i + NCOLORS * 2];
}
if (DFR8setpalette(hdfpal) == -1) {
HEprint(stderr, 0);
exit(-1);
}
if (DFR8putimage(argv[2], (void *)r8, x_dim, y_dim, COMPRESSION) == -1) {
HEprint(stderr, 0);
exit(-1);
}
free(r24);
free(r8);
free(pal);
return 0;
}
int
r24r8(int32 xres, int32 yres, UCHAR *dat24, UCHAR *dat8, int cres, UCHAR *cdat)
{
int ct, xct, yct;
int rres, rd, rr, rn, rct;
int gres, gd, gr, gn, gct;
int bres, bd, br, bn, bct;
int coff;
UINT *idat[2];
UINT *cp, *np;
UCHAR *dip, *dop, *rp, *gp, *bp;
if ((idat[0] = (UINT *)malloc((size_t)(6 * xres) * sizeof(UINT))) == NULL) {
fprintf(stderr, "error: Memory allocation fault\n");
return -1;
}
idat[1] = idat[0] + (3 * xres);
rres = 6;
gres = 7;
bres = 6;
coff = 2;
rr = gr = br = 255;
rn = rres - 1;
gn = gres - 1;
bn = bres - 1;
rp = cdat + coff;
gp = rp + cres;
bp = gp + cres;
for (rct = 0; rct < rres; rct++) {
for (gct = 0; gct < gres; gct++) {
for (bct = 0; bct < bres; bct++) {
*rp++ = (UCHAR)(rr * rct / rn);
*gp++ = (UCHAR)(gr * gct / gn);
*bp++ = (UCHAR)(br * bct / bn);
}
}
}
rp = cdat;
gp = rp + cres;
bp = gp + cres;
cp = idat[0];
np = idat[1];
dip = dat24;
dop = dat8;
for (xct = (intn)(3 * xres); --xct >= 0;)
*cp++ = (UINT)*dip++;
for (yct = 0; yct < (yres - 1); yct++) {
np = idat[(yct + 1) % 2];
for (xct = (intn)(3 * xres); --xct >= 0;)
*np++ = (UINT)*dip++;
cp = idat[yct % 2];
np = idat[(yct + 1) % 2];
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)(ct = (rct * gres + gct) * bres + bct + coff);
rd = (int)cp[0] - rp[ct];
gd = (int)cp[1] - gp[ct];
bd = (int)cp[2] - bp[ct];
cp += 3;
np += 3;
cp[0] += (UINT)(rd * 7 / 16);
cp[1] += (UINT)(gd * 7 / 16);
cp[2] += (UINT)(bd * 7 / 16);
np[-3] += (UINT)(rd * 5 / 16);
np[-2] += (UINT)(gd * 5 / 16);
np[-1] += (UINT)(bd * 5 / 16);
np[0] += (UINT)(rd / 16);
np[1] += (UINT)(gd / 16);
np[2] += (UINT)(bd / 16);
for (xct = 2; xct < xres; xct++) {
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)(ct = (rct * gres + gct) * bres + bct + coff);
rd = (int)cp[0] - rp[ct];
gd = (int)cp[1] - gp[ct];
bd = (int)cp[2] - bp[ct];
cp += 3;
np += 3;
cp[0] += (UINT)(rd * 7 / 16);
cp[1] += (UINT)(gd * 7 / 16);
cp[2] += (UINT)(bd * 7 / 16);
np[-6] += (UINT)(rd * 3 / 16);
np[-5] += (UINT)(gd * 3 / 16);
np[-4] += (UINT)(bd * 3 / 16);
np[-3] += (UINT)(rd * 5 / 16);
np[-2] += (UINT)(gd * 5 / 16);
np[-1] += (UINT)(bd * 5 / 16);
np[0] += (UINT)(rd / 16);
np[1] += (UINT)(gd / 16);
np[2] += (UINT)(bd / 16);
}
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)(ct = (rct * gres + gct) * bres + bct + coff);
rd = (int)cp[0] - rp[ct];
gd = (int)cp[1] - gp[ct];
bd = (int)cp[2] - bp[ct];
cp += 3;
np += 3;
np[-6] += (UINT)(rd * 3 / 16);
np[-5] += (UINT)(gd * 3 / 16);
np[-4] += (UINT)(bd * 3 / 16);
np[-3] += (UINT)(rd * 5 / 16);
np[-2] += (UINT)(gd * 5 / 16);
np[-1] += (UINT)(bd * 5 / 16);
}
cp = idat[yct % 2];
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)(ct = (rct * gres + gct) * bres + bct + coff);
rd = (int)cp[0] - rp[ct];
gd = (int)cp[1] - gp[ct];
bd = (int)cp[2] - bp[ct];
cp += 3;
cp[0] += (UINT)(rd * 7 / 16);
cp[1] += (UINT)(gd * 7 / 16);
cp[2] += (UINT)(bd * 7 / 16);
for (xct = 2; xct < xres; xct++) {
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)(ct = (rct * gres + gct) * bres + bct + coff);
rd = (int)cp[0] - rp[ct];
gd = (int)cp[1] - gp[ct];
bd = (int)cp[2] - bp[ct];
cp += 3;
cp[0] += (UINT)(rd * 7 / 16);
cp[1] += (UINT)(gd * 7 / 16);
cp[2] += (UINT)(bd * 7 / 16);
}
if ((rct = ((int)cp[0] * rn / rr)) > rn)
rct = rn;
if ((gct = ((int)cp[1] * gn / gr)) > gn)
gct = gn;
if ((bct = ((int)cp[2] * bn / br)) > bn)
bct = bn;
*dop++ = (UCHAR)((rct * gres + gct) * bres + bct + coff);
free(idat[0]);
return 0;
}
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