| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ra_t8.c,v 2.18 2025/06/06 19:11:21 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* ra_t8.c - program to convert between RADIANCE and |
| 6 |
* Targa 8-bit color-mapped images. |
| 7 |
* |
| 8 |
* 8/22/88 Adapted from ra_pr.c |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <math.h> |
| 12 |
#include "platform.h" |
| 13 |
#include "rtio.h" |
| 14 |
#include "rtmisc.h" |
| 15 |
#include "color.h" |
| 16 |
#include "resolu.h" |
| 17 |
#include "clrtab.h" |
| 18 |
#include "targa.h" |
| 19 |
|
| 20 |
|
| 21 |
#define goodpic(h) (my_imType(h) && my_mapType(h)) |
| 22 |
#define my_imType(h) (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \ |
| 23 |
&& (h)->dataBits==8 && (h)->imType==0) |
| 24 |
#define my_mapType(h) ((h)->mapType==CM_HASMAP && \ |
| 25 |
((h)->CMapBits==24 || (h)->CMapBits==32)) |
| 26 |
|
| 27 |
#define taralloc(h) (uby8 *)emalloc((h)->x*(h)->y) |
| 28 |
|
| 29 |
uby8 clrtab[256][3]; |
| 30 |
extern int samplefac; |
| 31 |
double gamv = 2.2; /* gamv correction */ |
| 32 |
int bradj = 0; /* brightness adjustment */ |
| 33 |
char errmsg[128]; |
| 34 |
COLR *inl; |
| 35 |
uby8 *tarData; |
| 36 |
int xmax, ymax; |
| 37 |
|
| 38 |
static int getint2(FILE *fp); |
| 39 |
static void putint2(int i, FILE *fp); |
| 40 |
static void quiterr(char *err); |
| 41 |
static int getthead(struct hdStruct *hp, char *ip, FILE *fp); |
| 42 |
static int putthead(struct hdStruct *hp, char *ip, FILE *fp); |
| 43 |
static int getrhead(struct hdStruct *h, FILE *fp); |
| 44 |
static void tg2ra(struct hdStruct *hp); |
| 45 |
static void getmapped(int nc, int dith); |
| 46 |
static void getgrey(int nc); |
| 47 |
static void writetarga(struct hdStruct *h, uby8 *d, FILE *fp); |
| 48 |
static void readtarga(struct hdStruct *h, uby8 *data, FILE *fp); |
| 49 |
|
| 50 |
|
| 51 |
int |
| 52 |
main( |
| 53 |
int argc, |
| 54 |
char *argv[] |
| 55 |
) |
| 56 |
{ |
| 57 |
struct hdStruct head; |
| 58 |
int dither = 1; |
| 59 |
int reverse = 0; |
| 60 |
int ncolors = 256; |
| 61 |
int greyscale = 0; |
| 62 |
int i; |
| 63 |
|
| 64 |
SET_DEFAULT_BINARY(); |
| 65 |
SET_FILE_BINARY(stdin); |
| 66 |
SET_FILE_BINARY(stdout); |
| 67 |
fixargv0(argv[0]); |
| 68 |
samplefac = 0; |
| 69 |
|
| 70 |
for (i = 1; i < argc; i++) |
| 71 |
if (argv[i][0] == '-') |
| 72 |
switch (argv[i][1]) { |
| 73 |
case 'd': |
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dither = !dither; |
| 75 |
break; |
| 76 |
case 'g': |
| 77 |
gamv = atof(argv[++i]); |
| 78 |
break; |
| 79 |
case 'r': |
| 80 |
reverse = !reverse; |
| 81 |
break; |
| 82 |
case 'b': |
| 83 |
greyscale = 1; |
| 84 |
break; |
| 85 |
case 'e': |
| 86 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 87 |
goto userr; |
| 88 |
bradj = atoi(argv[++i]); |
| 89 |
break; |
| 90 |
case 'c': |
| 91 |
ncolors = atoi(argv[++i]); |
| 92 |
break; |
| 93 |
case 'n': |
| 94 |
samplefac = atoi(argv[++i]); |
| 95 |
break; |
| 96 |
default: |
| 97 |
goto userr; |
| 98 |
} |
| 99 |
else |
| 100 |
break; |
| 101 |
|
| 102 |
if (i < argc-2) |
| 103 |
goto userr; |
| 104 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
| 105 |
sprintf(errmsg, "cannot open input \"%s\"", argv[i]); |
| 106 |
quiterr(errmsg); |
| 107 |
} |
| 108 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
| 109 |
sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]); |
| 110 |
quiterr(errmsg); |
| 111 |
} |
| 112 |
if (reverse) { |
| 113 |
/* get header */ |
| 114 |
if (getthead(&head, NULL, stdin) < 0) |
| 115 |
quiterr("bad targa file"); |
| 116 |
if (!goodpic(&head)) |
| 117 |
quiterr("incompatible format"); |
| 118 |
xmax = head.x; |
| 119 |
ymax = head.y; |
| 120 |
/* put header */ |
| 121 |
newheader("RADIANCE", stdout); |
| 122 |
printargs(i, argv, stdout); |
| 123 |
fputformat(COLRFMT, stdout); |
| 124 |
putchar('\n'); |
| 125 |
fprtresolu(xmax, ymax, stdout); |
| 126 |
/* convert file */ |
| 127 |
tg2ra(&head); |
| 128 |
} else { |
| 129 |
if (getrhead(&head, stdin) < 0) |
| 130 |
quiterr("bad Radiance input"); |
| 131 |
/* write header */ |
| 132 |
putthead(&head, NULL, stdout); |
| 133 |
/* convert file */ |
| 134 |
if (greyscale) |
| 135 |
getgrey(ncolors); |
| 136 |
else |
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getmapped(ncolors, dither); |
| 138 |
/* write data */ |
| 139 |
writetarga(&head, tarData, stdout); |
| 140 |
} |
| 141 |
quiterr(NULL); |
| 142 |
userr: |
| 143 |
fprintf(stderr, |
| 144 |
"Usage: %s [-d][-n samp][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n", |
| 145 |
progname); |
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fprintf(stderr, " Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n", |
| 147 |
progname); |
| 148 |
exit(1); |
| 149 |
} |
| 150 |
|
| 151 |
|
| 152 |
static int |
| 153 |
getint2( /* get a 2-byte positive integer */ |
| 154 |
FILE *fp |
| 155 |
) |
| 156 |
{ |
| 157 |
int b1, b2; |
| 158 |
|
| 159 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
| 160 |
quiterr("read error"); |
| 161 |
|
| 162 |
return(b1 | b2<<8); |
| 163 |
} |
| 164 |
|
| 165 |
|
| 166 |
static void |
| 167 |
putint2( /* put a 2-byte positive integer */ |
| 168 |
int i, |
| 169 |
FILE *fp |
| 170 |
) |
| 171 |
{ |
| 172 |
putc(i&0xff, fp); |
| 173 |
putc(i>>8&0xff, fp); |
| 174 |
} |
| 175 |
|
| 176 |
|
| 177 |
static void |
| 178 |
quiterr( /* print message and exit */ |
| 179 |
char *err |
| 180 |
) |
| 181 |
{ |
| 182 |
if (err != NULL) { |
| 183 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 184 |
exit(1); |
| 185 |
} |
| 186 |
exit(0); |
| 187 |
} |
| 188 |
|
| 189 |
|
| 190 |
void |
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eputs(const char *s) |
| 192 |
{ |
| 193 |
fputs(s, stderr); |
| 194 |
} |
| 195 |
|
| 196 |
|
| 197 |
void |
| 198 |
quit(int code) |
| 199 |
{ |
| 200 |
exit(code); |
| 201 |
} |
| 202 |
|
| 203 |
|
| 204 |
static int |
| 205 |
getthead( /* read header from input */ |
| 206 |
struct hdStruct *hp, |
| 207 |
char *ip, |
| 208 |
FILE *fp |
| 209 |
) |
| 210 |
{ |
| 211 |
int nidbytes; |
| 212 |
|
| 213 |
if ((nidbytes = getc(fp)) == EOF) |
| 214 |
return(-1); |
| 215 |
hp->mapType = getc(fp); |
| 216 |
hp->dataType = getc(fp); |
| 217 |
hp->mapOrig = getint2(fp); |
| 218 |
hp->mapLength = getint2(fp); |
| 219 |
hp->CMapBits = getc(fp); |
| 220 |
hp->XOffset = getint2(fp); |
| 221 |
hp->YOffset = getint2(fp); |
| 222 |
hp->x = getint2(fp); |
| 223 |
hp->y = getint2(fp); |
| 224 |
hp->dataBits = getc(fp); |
| 225 |
hp->imType = getc(fp); |
| 226 |
|
| 227 |
if (ip != NULL) |
| 228 |
if (nidbytes) |
| 229 |
fread((char *)ip, nidbytes, 1, fp); |
| 230 |
else |
| 231 |
*ip = '\0'; |
| 232 |
else if (nidbytes) |
| 233 |
fseek(fp, (long)nidbytes, 1); |
| 234 |
|
| 235 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
| 236 |
} |
| 237 |
|
| 238 |
|
| 239 |
static int |
| 240 |
putthead( /* write header to output */ |
| 241 |
struct hdStruct *hp, |
| 242 |
char *ip, |
| 243 |
FILE *fp |
| 244 |
) |
| 245 |
{ |
| 246 |
if (ip != NULL) |
| 247 |
putc(strlen(ip), fp); |
| 248 |
else |
| 249 |
putc(0, fp); |
| 250 |
putc(hp->mapType, fp); |
| 251 |
putc(hp->dataType, fp); |
| 252 |
putint2(hp->mapOrig, fp); |
| 253 |
putint2(hp->mapLength, fp); |
| 254 |
putc(hp->CMapBits, fp); |
| 255 |
putint2(hp->XOffset, fp); |
| 256 |
putint2(hp->YOffset, fp); |
| 257 |
putint2(hp->x, fp); |
| 258 |
putint2(hp->y, fp); |
| 259 |
putc(hp->dataBits, fp); |
| 260 |
putc(hp->imType, fp); |
| 261 |
|
| 262 |
if (ip != NULL) |
| 263 |
fputs(ip, fp); |
| 264 |
|
| 265 |
return(ferror(fp) ? -1 : 0); |
| 266 |
} |
| 267 |
|
| 268 |
|
| 269 |
static int |
| 270 |
getrhead( /* load RADIANCE input file header */ |
| 271 |
struct hdStruct *h, |
| 272 |
FILE *fp |
| 273 |
) |
| 274 |
{ |
| 275 |
/* get header info. */ |
| 276 |
if (checkheader(fp, COLRFMT, NULL) < 0 || |
| 277 |
fgetresolu(&xmax, &ymax, fp) < 0) |
| 278 |
return(-1); |
| 279 |
/* assign header */ |
| 280 |
h->textSize = 0; |
| 281 |
h->mapType = CM_HASMAP; |
| 282 |
h->dataType = IM_CMAP; |
| 283 |
h->mapOrig = 0; |
| 284 |
h->mapLength = 256; |
| 285 |
h->CMapBits = 24; |
| 286 |
h->XOffset = 0; |
| 287 |
h->YOffset = 0; |
| 288 |
h->x = xmax; |
| 289 |
h->y = ymax; |
| 290 |
h->dataBits = 8; |
| 291 |
h->imType = 0; |
| 292 |
/* allocate scanline */ |
| 293 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 294 |
/* allocate targa data */ |
| 295 |
tarData = taralloc(h); |
| 296 |
|
| 297 |
return(0); |
| 298 |
} |
| 299 |
|
| 300 |
|
| 301 |
static void |
| 302 |
tg2ra( /* targa file to RADIANCE file */ |
| 303 |
struct hdStruct *hp |
| 304 |
) |
| 305 |
{ |
| 306 |
union { |
| 307 |
uby8 c3[256][3]; |
| 308 |
uby8 c4[256][4]; |
| 309 |
} map; |
| 310 |
COLR ctab[256]; |
| 311 |
COLR *scanline; |
| 312 |
int i, j; |
| 313 |
|
| 314 |
/* get color table */ |
| 315 |
if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig), |
| 316 |
3*hp->mapLength,1,stdin) : |
| 317 |
fread((char *)(map.c4+hp->mapOrig), |
| 318 |
4*hp->mapLength,1,stdin)) != 1) |
| 319 |
quiterr("error reading color table"); |
| 320 |
/* convert table */ |
| 321 |
for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
| 322 |
if (hp->CMapBits == 24) |
| 323 |
setcolr(ctab[i], |
| 324 |
pow((map.c3[i][2]+.5)/256.,gamv), |
| 325 |
pow((map.c3[i][1]+.5)/256.,gamv), |
| 326 |
pow((map.c3[i][0]+.5)/256.,gamv)); |
| 327 |
else |
| 328 |
setcolr(ctab[i], |
| 329 |
pow((map.c4[i][3]+.5)/256.,gamv), |
| 330 |
pow((map.c4[i][2]+.5)/256.,gamv), |
| 331 |
pow((map.c4[i][1]+.5)/256.,gamv)); |
| 332 |
if (bradj) |
| 333 |
shiftcolrs(ctab, 256, bradj); |
| 334 |
/* allocate targa data */ |
| 335 |
tarData = taralloc(hp); |
| 336 |
/* get data */ |
| 337 |
readtarga(hp, tarData, stdin); |
| 338 |
/* allocate input scanline */ |
| 339 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 340 |
/* convert file */ |
| 341 |
for (i = ymax-1; i >= 0; i--) { |
| 342 |
for (j = 0; j < xmax; j++) |
| 343 |
copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
| 344 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
| 345 |
quiterr("error writing RADIANCE file"); |
| 346 |
} |
| 347 |
free((void *)scanline); |
| 348 |
free((void *)tarData); |
| 349 |
} |
| 350 |
|
| 351 |
|
| 352 |
static void |
| 353 |
getmapped( /* read in and quantize image */ |
| 354 |
int nc, /* number of colors to use */ |
| 355 |
int dith /* use dithering? */ |
| 356 |
) |
| 357 |
{ |
| 358 |
long fpos; |
| 359 |
int y; |
| 360 |
|
| 361 |
setcolrgam(gamv); |
| 362 |
fpos = ftell(stdin); |
| 363 |
if ((samplefac ? neu_init(xmax*ymax) : new_histo(xmax*ymax)) == -1) |
| 364 |
quiterr("cannot initialized histogram"); |
| 365 |
for (y = ymax-1; y >= 0; y--) { |
| 366 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 367 |
quiterr("error reading Radiance input"); |
| 368 |
if (bradj) |
| 369 |
shiftcolrs(inl, xmax, bradj); |
| 370 |
colrs_gambs(inl, xmax); |
| 371 |
if (samplefac) |
| 372 |
neu_colrs(inl, xmax); |
| 373 |
else |
| 374 |
cnt_colrs(inl, xmax); |
| 375 |
} |
| 376 |
if (fseek(stdin, fpos, 0) == EOF) |
| 377 |
quiterr("Radiance input must be from a file"); |
| 378 |
if (samplefac) /* map colors */ |
| 379 |
neu_clrtab(nc); |
| 380 |
else |
| 381 |
new_clrtab(nc); |
| 382 |
for (y = ymax-1; y >= 0; y--) { |
| 383 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 384 |
quiterr("error reading Radiance input"); |
| 385 |
if (bradj) |
| 386 |
shiftcolrs(inl, xmax, bradj); |
| 387 |
colrs_gambs(inl, xmax); |
| 388 |
if (samplefac) |
| 389 |
if (dith) |
| 390 |
neu_dith_colrs(tarData+y*xmax, inl, xmax); |
| 391 |
else |
| 392 |
neu_map_colrs(tarData+y*xmax, inl, xmax); |
| 393 |
else |
| 394 |
if (dith) |
| 395 |
dith_colrs(tarData+y*xmax, inl, xmax); |
| 396 |
else |
| 397 |
map_colrs(tarData+y*xmax, inl, xmax); |
| 398 |
} |
| 399 |
} |
| 400 |
|
| 401 |
|
| 402 |
static void |
| 403 |
getgrey( /* read in and convert to greyscale image */ |
| 404 |
int nc /* number of colors to use */ |
| 405 |
) |
| 406 |
{ |
| 407 |
int y; |
| 408 |
uby8 *dp; |
| 409 |
int x; |
| 410 |
|
| 411 |
setcolrgam(gamv); |
| 412 |
dp = tarData+xmax*ymax;; |
| 413 |
for (y = ymax-1; y >= 0; y--) { |
| 414 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 415 |
quiterr("error reading Radiance input"); |
| 416 |
if (bradj) |
| 417 |
shiftcolrs(inl, xmax, bradj); |
| 418 |
x = xmax; |
| 419 |
while (x--) |
| 420 |
inl[x][GRN] = normbright(inl[x]); |
| 421 |
colrs_gambs(inl, xmax); |
| 422 |
x = xmax; |
| 423 |
if (nc < 256) |
| 424 |
while (x--) |
| 425 |
*--dp = ((long)inl[x][GRN]*nc+nc/2)>>8; |
| 426 |
else |
| 427 |
while (x--) |
| 428 |
*--dp = inl[x][GRN]; |
| 429 |
} |
| 430 |
for (x = 0; x < nc; x++) |
| 431 |
clrtab[x][RED] = clrtab[x][GRN] = |
| 432 |
clrtab[x][BLU] = ((long)x*256+128)/nc; |
| 433 |
} |
| 434 |
|
| 435 |
|
| 436 |
static void |
| 437 |
writetarga( /* write out targa data */ |
| 438 |
struct hdStruct *h, |
| 439 |
uby8 *d, |
| 440 |
FILE *fp |
| 441 |
) |
| 442 |
{ |
| 443 |
int i, j; |
| 444 |
|
| 445 |
for (i = 0; i < h->mapLength; i++) /* write color map */ |
| 446 |
for (j = 2; j >= 0; j--) |
| 447 |
putc(clrtab[i][j], fp); |
| 448 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 449 |
if (fwrite((char *)d,h->x*sizeof(uby8),h->y,fp) != h->y) |
| 450 |
quiterr("error writing targa file"); |
| 451 |
return; |
| 452 |
} |
| 453 |
quiterr("unsupported output type"); |
| 454 |
} |
| 455 |
|
| 456 |
|
| 457 |
static void |
| 458 |
readtarga( /* read in targa data */ |
| 459 |
struct hdStruct *h, |
| 460 |
uby8 *data, |
| 461 |
FILE *fp |
| 462 |
) |
| 463 |
{ |
| 464 |
int cnt, c; |
| 465 |
uby8 *dp; |
| 466 |
|
| 467 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 468 |
if (fread((char *)data,h->x*sizeof(uby8),h->y,fp) != h->y) |
| 469 |
goto readerr; |
| 470 |
return; |
| 471 |
} |
| 472 |
for (dp = data; dp < data+h->x*h->y; ) { |
| 473 |
if ((c = getc(fp)) == EOF) |
| 474 |
goto readerr; |
| 475 |
cnt = (c & 0x7f) + 1; |
| 476 |
if (c & 0x80) { /* repeated pixel */ |
| 477 |
if ((c = getc(fp)) == EOF) |
| 478 |
goto readerr; |
| 479 |
while (cnt--) |
| 480 |
*dp++ = c; |
| 481 |
} else /* non-repeating pixels */ |
| 482 |
while (cnt--) { |
| 483 |
if ((c = getc(fp)) == EOF) |
| 484 |
goto readerr; |
| 485 |
*dp++ = c; |
| 486 |
} |
| 487 |
} |
| 488 |
return; |
| 489 |
readerr: |
| 490 |
quiterr("error reading targa file"); |
| 491 |
} |
