| 1 |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* flip picture file horizontally and/or vertically |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
|
| 13 |
#include "color.h" |
| 14 |
|
| 15 |
int xres, yres; /* input resolution */ |
| 16 |
|
| 17 |
long *scanpos; /* scanline positions */ |
| 18 |
|
| 19 |
int fhoriz, fvert; /* flip flags */ |
| 20 |
|
| 21 |
FILE *fin; /* input file */ |
| 22 |
|
| 23 |
char *progname; |
| 24 |
|
| 25 |
|
| 26 |
main(argc, argv) |
| 27 |
int argc; |
| 28 |
char *argv[]; |
| 29 |
{ |
| 30 |
int i; |
| 31 |
|
| 32 |
progname = argv[0]; |
| 33 |
|
| 34 |
for (i = 1; i < argc; i++) |
| 35 |
if (!strcmp(argv[i], "-h")) |
| 36 |
fhoriz++; |
| 37 |
else if (!strcmp(argv[i], "-v")) |
| 38 |
fvert++; |
| 39 |
else |
| 40 |
break; |
| 41 |
if (i >= argc || argv[i][0] == '-') { |
| 42 |
fprintf(stderr, "Usage: %s [-h][-v] infile [outfile]\n", |
| 43 |
progname); |
| 44 |
exit(1); |
| 45 |
} |
| 46 |
if ((fin = fopen(argv[i], "r")) == NULL) { |
| 47 |
fprintf(stderr, "%s: cannot open\n", argv[1]); |
| 48 |
exit(1); |
| 49 |
} |
| 50 |
if (i < argc-1 && freopen(argv[i+1], "w", stdout) == NULL) { |
| 51 |
fprintf(stderr, "%s: cannot open\n", argv[i+1]); |
| 52 |
exit(1); |
| 53 |
} |
| 54 |
/* transfer header */ |
| 55 |
if (checkheader(fin, COLRFMT, stdout) < 0) { |
| 56 |
fprintf(stderr, "%s: input not a Radiance picture\n", |
| 57 |
progname); |
| 58 |
exit(1); |
| 59 |
} |
| 60 |
/* add new header info. */ |
| 61 |
printargs(i, argv, stdout); |
| 62 |
fputformat(COLRFMT, stdout); |
| 63 |
putchar('\n'); |
| 64 |
/* get picture size */ |
| 65 |
if (fgetresolu(&xres, &yres, fin) != (YMAJOR|YDECR)) { |
| 66 |
fprintf(stderr, "%s: bad picture size\n", progname); |
| 67 |
exit(1); |
| 68 |
} |
| 69 |
/* write new picture size */ |
| 70 |
fputresolu(YMAJOR|YDECR, xres, yres, stdout); |
| 71 |
/* goto end if vertical flip */ |
| 72 |
if (fvert) |
| 73 |
scanfile(); |
| 74 |
flip(); /* flip the image */ |
| 75 |
exit(0); |
| 76 |
} |
| 77 |
|
| 78 |
|
| 79 |
memerr() |
| 80 |
{ |
| 81 |
fprintf(stderr, "%s: out of memory\n", progname); |
| 82 |
exit(1); |
| 83 |
} |
| 84 |
|
| 85 |
|
| 86 |
scanfile() /* scan to the end of file */ |
| 87 |
{ |
| 88 |
extern long ftell(); |
| 89 |
COLR *scanin; |
| 90 |
int y; |
| 91 |
|
| 92 |
if ((scanpos = (long *)malloc(yres*sizeof(long))) == NULL) |
| 93 |
memerr(); |
| 94 |
if ((scanin = (COLR *)malloc(xres*sizeof(COLR))) == NULL) |
| 95 |
memerr(); |
| 96 |
for (y = yres-1; y >= 0; y--) { |
| 97 |
scanpos[y] = ftell(fin); |
| 98 |
if (freadcolrs(scanin, xres, fin) < 0) { |
| 99 |
fprintf(stderr, "%s: read error\n", progname); |
| 100 |
exit(1); |
| 101 |
} |
| 102 |
} |
| 103 |
free((char *)scanin); |
| 104 |
} |
| 105 |
|
| 106 |
|
| 107 |
flip() /* flip the picture */ |
| 108 |
{ |
| 109 |
COLR *scanin, *scanout; |
| 110 |
int y; |
| 111 |
register int x; |
| 112 |
|
| 113 |
if ((scanin = (COLR *)malloc(xres*sizeof(COLR))) == NULL) |
| 114 |
memerr(); |
| 115 |
if (fhoriz) { |
| 116 |
if ((scanout = (COLR *)malloc(xres*sizeof(COLR))) == NULL) |
| 117 |
memerr(); |
| 118 |
} else |
| 119 |
scanout = scanin; |
| 120 |
for (y = yres-1; y >= 0; y--) { |
| 121 |
if (fvert && fseek(fin, scanpos[yres-1-y], 0) == EOF) { |
| 122 |
fprintf(stderr, "%s: seek error\n", progname); |
| 123 |
exit(1); |
| 124 |
} |
| 125 |
if (freadcolrs(scanin, xres, fin) < 0) { |
| 126 |
fprintf(stderr, "%s: read error\n", progname); |
| 127 |
exit(1); |
| 128 |
} |
| 129 |
if (fhoriz) |
| 130 |
for (x = 0; x < xres; x++) |
| 131 |
copycolr(scanout[x], scanin[xres-1-x]); |
| 132 |
if (fwritecolrs(scanout, xres, stdout) < 0) { |
| 133 |
fprintf(stderr, "%s: write error\n", progname); |
| 134 |
exit(1); |
| 135 |
} |
| 136 |
} |
| 137 |
free((char *)scanin); |
| 138 |
free((char *)scanout); |
| 139 |
} |
