| 1 |
/* Copyright (c) 1992 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* program to convert between RADIANCE and Poskanzer Pixmaps |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
|
| 13 |
#ifdef MSDOS |
| 14 |
#include <fcntl.h> |
| 15 |
#endif |
| 16 |
|
| 17 |
#include <math.h> |
| 18 |
|
| 19 |
#include <ctype.h> |
| 20 |
|
| 21 |
#include "color.h" |
| 22 |
|
| 23 |
#include "resolu.h" |
| 24 |
|
| 25 |
|
| 26 |
extern char *malloc(); |
| 27 |
|
| 28 |
int agryscan(), bgryscan(), aclrscan(), bclrscan(); |
| 29 |
|
| 30 |
int bradj = 0; /* brightness adjustment */ |
| 31 |
|
| 32 |
int maxval = 255; /* maximum primary value */ |
| 33 |
|
| 34 |
char *progname; |
| 35 |
|
| 36 |
int xmax, ymax; |
| 37 |
|
| 38 |
|
| 39 |
main(argc, argv) |
| 40 |
int argc; |
| 41 |
char *argv[]; |
| 42 |
{ |
| 43 |
char inpbuf[2]; |
| 44 |
double gamma = 2.2; |
| 45 |
int binflag = 1; |
| 46 |
int reverse = 0; |
| 47 |
int ptype; |
| 48 |
int i; |
| 49 |
|
| 50 |
progname = argv[0]; |
| 51 |
|
| 52 |
for (i = 1; i < argc; i++) |
| 53 |
if (argv[i][0] == '-') |
| 54 |
switch (argv[i][1]) { |
| 55 |
case 'g': |
| 56 |
gamma = atof(argv[++i]); |
| 57 |
break; |
| 58 |
case 'e': |
| 59 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 60 |
goto userr; |
| 61 |
bradj = atoi(argv[++i]); |
| 62 |
break; |
| 63 |
case 'a': |
| 64 |
binflag = 0; |
| 65 |
break; |
| 66 |
case 'r': |
| 67 |
reverse = !reverse; |
| 68 |
break; |
| 69 |
default: |
| 70 |
goto userr; |
| 71 |
} |
| 72 |
else |
| 73 |
break; |
| 74 |
|
| 75 |
if (i < argc-2) |
| 76 |
goto userr; |
| 77 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
| 78 |
fprintf(stderr, "%s: can't open input \"%s\"\n", |
| 79 |
progname, argv[i]); |
| 80 |
exit(1); |
| 81 |
} |
| 82 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
| 83 |
fprintf(stderr, "can't open output \"%s\"\n", |
| 84 |
progname, argv[i+1]); |
| 85 |
exit(1); |
| 86 |
} |
| 87 |
setcolrgam(gamma); |
| 88 |
if (reverse) { |
| 89 |
/* get header */ |
| 90 |
if (read(fileno(stdin), inpbuf, 2) != 2 || inpbuf[0] != 'P') |
| 91 |
quiterr("input not a Poskanzer Pixmap"); |
| 92 |
ptype = inpbuf[1]; |
| 93 |
#ifdef MSDOS |
| 94 |
if (ptype > 4) |
| 95 |
setmode(fileno(stdin), O_BINARY); |
| 96 |
setmode(fileno(stdout), O_BINARY); |
| 97 |
#endif |
| 98 |
xmax = scanint(stdin); |
| 99 |
ymax = scanint(stdin); |
| 100 |
maxval = scanint(stdin); |
| 101 |
/* put header */ |
| 102 |
printargs(i, argv, stdout); |
| 103 |
fputformat(COLRFMT, stdout); |
| 104 |
putchar('\n'); |
| 105 |
fprtresolu(xmax, ymax, stdout); |
| 106 |
/* convert file */ |
| 107 |
switch (ptype) { |
| 108 |
case '2': |
| 109 |
ppm2ra(agryscan); |
| 110 |
break; |
| 111 |
case '5': |
| 112 |
ppm2ra(bgryscan); |
| 113 |
break; |
| 114 |
case '3': |
| 115 |
ppm2ra(aclrscan); |
| 116 |
break; |
| 117 |
case '6': |
| 118 |
ppm2ra(bclrscan); |
| 119 |
break; |
| 120 |
default: |
| 121 |
quiterr("unsupported Pixmap type"); |
| 122 |
} |
| 123 |
} else { |
| 124 |
#ifdef MSDOS |
| 125 |
setmode(fileno(stdin), O_BINARY); |
| 126 |
if (binflag) |
| 127 |
setmode(fileno(stdout), O_BINARY); |
| 128 |
#endif |
| 129 |
/* get header info. */ |
| 130 |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
| 131 |
fgetresolu(&xmax, &ymax, stdin) < 0) |
| 132 |
quiterr("bad picture format"); |
| 133 |
/* write PPM header */ |
| 134 |
printf("P%c\n%d %d\n%d\n", binflag ? '6' : '3', |
| 135 |
xmax, ymax, maxval); |
| 136 |
/* convert file */ |
| 137 |
ra2ppm(binflag); |
| 138 |
} |
| 139 |
exit(0); |
| 140 |
userr: |
| 141 |
fprintf(stderr, |
| 142 |
"Usage: %s [-r][-a][-g gamma][-e +/-stops] [input [output]]\n", |
| 143 |
progname); |
| 144 |
exit(1); |
| 145 |
} |
| 146 |
|
| 147 |
|
| 148 |
quiterr(err) /* print message and exit */ |
| 149 |
char *err; |
| 150 |
{ |
| 151 |
if (err != NULL) { |
| 152 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 153 |
exit(1); |
| 154 |
} |
| 155 |
exit(0); |
| 156 |
} |
| 157 |
|
| 158 |
|
| 159 |
ppm2ra(getscan) /* convert color Pixmap to Radiance picture */ |
| 160 |
int (*getscan)(); |
| 161 |
{ |
| 162 |
COLR *scanout; |
| 163 |
register int x; |
| 164 |
int y; |
| 165 |
/* allocate scanline */ |
| 166 |
scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
| 167 |
if (scanout == NULL) |
| 168 |
quiterr("out of memory in ppm2ra"); |
| 169 |
/* convert image */ |
| 170 |
for (y = ymax-1; y >= 0; y--) { |
| 171 |
if ((*getscan)(scanout, xmax, stdin) < 0) |
| 172 |
quiterr("error reading Pixmap"); |
| 173 |
gambs_colrs(scanout, xmax); |
| 174 |
if (bradj) |
| 175 |
shiftcolrs(scanout, xmax, bradj); |
| 176 |
if (fwritecolrs(scanout, xmax, stdout) < 0) |
| 177 |
quiterr("error writing Radiance picture"); |
| 178 |
} |
| 179 |
/* free scanline */ |
| 180 |
free((char *)scanout); |
| 181 |
} |
| 182 |
|
| 183 |
|
| 184 |
ra2ppm(binary) /* convert Radiance picture to Pixmap */ |
| 185 |
int binary; |
| 186 |
{ |
| 187 |
COLR *scanin; |
| 188 |
register int x; |
| 189 |
int y; |
| 190 |
/* allocate scanline */ |
| 191 |
scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
| 192 |
if (scanin == NULL) |
| 193 |
quiterr("out of memory in ra2pr"); |
| 194 |
/* convert image */ |
| 195 |
for (y = ymax-1; y >= 0; y--) { |
| 196 |
if (freadcolrs(scanin, xmax, stdin) < 0) |
| 197 |
quiterr("error reading Radiance picture"); |
| 198 |
if (bradj) |
| 199 |
shiftcolrs(scanin, xmax, bradj); |
| 200 |
colrs_gambs(scanin, xmax); |
| 201 |
if (binary) |
| 202 |
for (x = 0; x < xmax; x++) { |
| 203 |
putc(scanin[x][RED], stdout); |
| 204 |
putc(scanin[x][GRN], stdout); |
| 205 |
putc(scanin[x][BLU], stdout); |
| 206 |
} |
| 207 |
else |
| 208 |
for (x = 0; x < xmax; x++) |
| 209 |
printf("%d %d %d\n", scanin[x][RED], |
| 210 |
scanin[x][GRN], |
| 211 |
scanin[x][BLU]); |
| 212 |
if (ferror(stdout)) |
| 213 |
quiterr("error writing Pixmap"); |
| 214 |
} |
| 215 |
/* free scanline */ |
| 216 |
free((char *)scanin); |
| 217 |
} |
| 218 |
|
| 219 |
|
| 220 |
agryscan(scan, len, fp) /* get an ASCII greyscale scanline */ |
| 221 |
register COLR *scan; |
| 222 |
register int len; |
| 223 |
FILE *fp; |
| 224 |
{ |
| 225 |
while (len-- > 0) { |
| 226 |
scan[0][RED] = |
| 227 |
scan[0][GRN] = |
| 228 |
scan[0][BLU] = normval(scanint(fp)); |
| 229 |
scan++; |
| 230 |
} |
| 231 |
return(0); |
| 232 |
} |
| 233 |
|
| 234 |
|
| 235 |
bgryscan(scan, len, fp) /* get a binary greyscale scanline */ |
| 236 |
register COLR *scan; |
| 237 |
int len; |
| 238 |
register FILE *fp; |
| 239 |
{ |
| 240 |
register int c; |
| 241 |
|
| 242 |
while (len-- > 0) { |
| 243 |
if ((c = getc(fp)) == EOF) |
| 244 |
return(-1); |
| 245 |
if (maxval != 255) |
| 246 |
c = normval(c); |
| 247 |
scan[0][RED] = |
| 248 |
scan[0][GRN] = |
| 249 |
scan[0][BLU] = c; |
| 250 |
scan++; |
| 251 |
} |
| 252 |
return(0); |
| 253 |
} |
| 254 |
|
| 255 |
|
| 256 |
aclrscan(scan, len, fp) /* get an ASCII color scanline */ |
| 257 |
register COLR *scan; |
| 258 |
register int len; |
| 259 |
FILE *fp; |
| 260 |
{ |
| 261 |
while (len-- > 0) { |
| 262 |
scan[0][RED] = normval(scanint(fp)); |
| 263 |
scan[0][GRN] = normval(scanint(fp)); |
| 264 |
scan[0][BLU] = normval(scanint(fp)); |
| 265 |
scan++; |
| 266 |
} |
| 267 |
return(0); |
| 268 |
} |
| 269 |
|
| 270 |
|
| 271 |
bclrscan(scan, len, fp) /* get a binary color scanline */ |
| 272 |
register COLR *scan; |
| 273 |
int len; |
| 274 |
register FILE *fp; |
| 275 |
{ |
| 276 |
int r, g, b; |
| 277 |
|
| 278 |
while (len-- > 0) { |
| 279 |
r = getc(fp); |
| 280 |
g = getc(fp); |
| 281 |
if ((b = getc(fp)) == EOF) |
| 282 |
return(-1); |
| 283 |
if (maxval == 255) { |
| 284 |
scan[0][RED] = r; |
| 285 |
scan[0][GRN] = g; |
| 286 |
scan[0][BLU] = b; |
| 287 |
} else { |
| 288 |
scan[0][RED] = normval(r); |
| 289 |
scan[0][GRN] = normval(g); |
| 290 |
scan[0][BLU] = normval(b); |
| 291 |
} |
| 292 |
scan++; |
| 293 |
} |
| 294 |
return(0); |
| 295 |
} |
| 296 |
|
| 297 |
|
| 298 |
int |
| 299 |
scanint(fp) /* scan the next positive integer value */ |
| 300 |
register FILE *fp; |
| 301 |
{ |
| 302 |
register int i, c; |
| 303 |
tryagain: |
| 304 |
while (isspace(c = getc(fp))) |
| 305 |
; |
| 306 |
if (c == EOF) |
| 307 |
quiterr("unexpected end of file"); |
| 308 |
if (c == '#') { /* comment */ |
| 309 |
while ((c = getc(fp)) != EOF && c != '\n') |
| 310 |
; |
| 311 |
goto tryagain; |
| 312 |
} |
| 313 |
/* should be integer */ |
| 314 |
i = 0; |
| 315 |
do { |
| 316 |
if (!isdigit(c)) |
| 317 |
quiterr("error reading integer"); |
| 318 |
i = 10*i + c - '0'; |
| 319 |
c = getc(fp); |
| 320 |
} while (c != EOF && !isspace(c)); |
| 321 |
return(i); |
| 322 |
} |
| 323 |
|
| 324 |
|
| 325 |
int |
| 326 |
normval(v) /* normalize a value to [0,255] */ |
| 327 |
register int v; |
| 328 |
{ |
| 329 |
if (v >= maxval) |
| 330 |
return(255); |
| 331 |
if (maxval == 255) |
| 332 |
return(v); |
| 333 |
return(v*255L/maxval); |
| 334 |
} |
