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greg |
1.1 |
/* Copyright (c) 1988 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* prot.c - program to rotate picture file 90 degrees clockwise.
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*
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* 2/26/88
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*/
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#include <stdio.h>
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#include "color.h"
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int xres, yres; /* input resolution */
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char buf[1<<20]; /* output buffer */
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int nrows; /* number of rows output at once */
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#define scanbar ((COLR *)buf)
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char *progname;
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main(argc, argv)
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int argc;
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char *argv[];
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{
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FILE *fin;
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progname = argv[0];
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if (argc != 2 && argc != 3) {
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fprintf(stderr, "Usage: %s infile [outfile]\n", progname);
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exit(1);
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}
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if ((fin = fopen(argv[1], "r")) == NULL) {
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fprintf(stderr, "%s: cannot open\n", argv[1]);
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exit(1);
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}
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if (argc == 3 && freopen(argv[2], "w", stdout) == NULL) {
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fprintf(stderr, "%s: cannot open\n", argv[2]);
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exit(1);
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}
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/* copy header */
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greg |
1.4 |
copyheader(fin, stdout);
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greg |
1.1 |
/* add new header info. */
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printf("%s\n\n", progname);
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/* get picture size */
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greg |
1.2 |
if (fgetresolu(&xres, &yres, fin) != (YMAJOR|YDECR)) {
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greg |
1.1 |
fprintf(stderr, "%s: bad picture size\n", progname);
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exit(1);
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}
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/* write new picture size */
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greg |
1.2 |
fputresolu(YMAJOR|YDECR, yres, xres, stdout);
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greg |
1.1 |
/* compute buffer capacity */
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nrows = sizeof(buf)/sizeof(COLR)/yres;
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rotate(fin); /* rotate the image */
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exit(0);
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}
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rotate(fp) /* rotate picture */
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FILE *fp;
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{
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register COLR *inline;
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register int xoff, inx, iny;
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long start, ftell();
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if ((inline = (COLR *)malloc(xres*sizeof(COLR))) == NULL) {
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fprintf(stderr, "%s: out of memory\n", progname);
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exit(1);
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}
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start = ftell(fp);
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for (xoff = 0; xoff < xres; xoff += nrows) {
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if (fseek(fp, start, 0) < 0) {
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fprintf(stderr, "%s: seek error\n", progname);
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exit(1);
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}
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for (iny = yres-1; iny >= 0; iny--) {
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if (freadcolrs(inline, xres, fp) < 0) {
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fprintf(stderr, "%s: read error\n", progname);
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exit(1);
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}
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for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
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greg |
1.3 |
bcopy((char *)inline[xoff+inx],
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(char *)scanbar[inx*yres+iny],
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greg |
1.1 |
sizeof(COLR));
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}
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for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
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if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
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fprintf(stderr, "%s: write error\n", progname);
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exit(1);
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}
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}
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free((char *)inline);
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}
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