| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ra_t16.c,v 2.11 2025/06/06 19:11:21 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* ra_t16.c - program to convert between RADIANCE and |
| 6 |
* Targa 16, 24 and 32-bit images. |
| 7 |
* |
| 8 |
* 11/2/88 Adapted from ra_t8.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 "random.h" |
| 18 |
#include "targa.h" |
| 19 |
|
| 20 |
#define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \ |
| 21 |
&& ((h)->dataBits==16 || (h)->dataBits==24)) |
| 22 |
|
| 23 |
#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8) |
| 24 |
|
| 25 |
#define readtarga(h,d,f) ((h)->dataBits==16 ? \ |
| 26 |
readt16(h,(unsigned short*)d,f) : readt24(h,d,f)) |
| 27 |
|
| 28 |
#define writetarga(h,d,f) ((h)->dataBits==16 ? \ |
| 29 |
writet16(h,(unsigned short*)d,f) : writet24(h,d,f)) |
| 30 |
|
| 31 |
double gamcor = 2.2; /* gamma correction */ |
| 32 |
int bradj = 0; /* brightness adjustment */ |
| 33 |
char msg[128]; |
| 34 |
|
| 35 |
static int getint2(FILE *fp); |
| 36 |
static void putint2(int i, FILE *fp); |
| 37 |
static void quiterr(char *err); |
| 38 |
static int getthead(struct hdStruct *hp, char *ip, FILE *fp); |
| 39 |
static int putthead(struct hdStruct *hp, char *ip, FILE *fp); |
| 40 |
static void tg2ra(struct hdStruct *hp); |
| 41 |
static void ra2tg(struct hdStruct *hp); |
| 42 |
static void writet24(struct hdStruct *h, unsigned char *d, FILE *fp); |
| 43 |
static void writet16(struct hdStruct *h, unsigned short *d, FILE *fp); |
| 44 |
static void readt24(struct hdStruct *h, unsigned char *data, FILE *fp); |
| 45 |
static void readt16(struct hdStruct *h, unsigned short *data, FILE *fp); |
| 46 |
|
| 47 |
|
| 48 |
int |
| 49 |
main(int argc, char *argv[]) |
| 50 |
{ |
| 51 |
struct hdStruct head; |
| 52 |
int reverse = 0; |
| 53 |
int i; |
| 54 |
|
| 55 |
SET_DEFAULT_BINARY(); |
| 56 |
SET_FILE_BINARY(stdin); |
| 57 |
SET_FILE_BINARY(stdout); |
| 58 |
fixargv0(argv[0]); |
| 59 |
|
| 60 |
head.dataBits = 16; |
| 61 |
for (i = 1; i < argc; i++) |
| 62 |
if (argv[i][0] == '-') |
| 63 |
switch (argv[i][1]) { |
| 64 |
case 'g': |
| 65 |
gamcor = atof(argv[++i]); |
| 66 |
break; |
| 67 |
case 'r': |
| 68 |
reverse = !reverse; |
| 69 |
break; |
| 70 |
case '2': |
| 71 |
head.dataBits = 16; |
| 72 |
break; |
| 73 |
case '3': |
| 74 |
head.dataBits = 24; |
| 75 |
break; |
| 76 |
case 'e': |
| 77 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 78 |
goto userr; |
| 79 |
bradj = atoi(argv[++i]); |
| 80 |
break; |
| 81 |
default: |
| 82 |
goto userr; |
| 83 |
} |
| 84 |
else |
| 85 |
break; |
| 86 |
|
| 87 |
if (i < argc-2) |
| 88 |
goto userr; |
| 89 |
/* open input file */ |
| 90 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
| 91 |
sprintf(msg, "can't open input \"%s\"", argv[i]); |
| 92 |
quiterr(msg); |
| 93 |
} |
| 94 |
/* open output file */ |
| 95 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
| 96 |
sprintf(msg, "can't open output \"%s\"", argv[i+1]); |
| 97 |
quiterr(msg); |
| 98 |
} |
| 99 |
/* set gamma */ |
| 100 |
setcolrgam(gamcor); |
| 101 |
/* convert */ |
| 102 |
if (reverse) { |
| 103 |
/* get header */ |
| 104 |
if (getthead(&head, NULL, stdin) < 0) |
| 105 |
quiterr("bad targa file"); |
| 106 |
if (!goodpic(&head)) |
| 107 |
quiterr("incompatible format"); |
| 108 |
/* put header */ |
| 109 |
newheader("RADIANCE", stdout); |
| 110 |
printargs(i, argv, stdout); |
| 111 |
fputformat(COLRFMT, stdout); |
| 112 |
putchar('\n'); |
| 113 |
fprtresolu(head.x, head.y, stdout); |
| 114 |
/* convert file */ |
| 115 |
tg2ra(&head); |
| 116 |
} else { |
| 117 |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
| 118 |
fgetresolu(&head.x, &head.y, stdin) < 0) |
| 119 |
quiterr("bad picture file"); |
| 120 |
/* assign header */ |
| 121 |
head.textSize = 0; |
| 122 |
head.mapType = CM_NOMAP; |
| 123 |
head.dataType = IM_RGB; |
| 124 |
head.XOffset = 0; |
| 125 |
head.YOffset = 0; |
| 126 |
head.imType = 0; |
| 127 |
/* write header */ |
| 128 |
putthead(&head, NULL, stdout); |
| 129 |
/* convert file */ |
| 130 |
ra2tg(&head); |
| 131 |
} |
| 132 |
exit(0); |
| 133 |
userr: |
| 134 |
fprintf(stderr, "Usage: %s [-2|-3|-r][-g gamma][-e +/-stops] [input [output]]\n", |
| 135 |
progname); |
| 136 |
exit(1); |
| 137 |
} |
| 138 |
|
| 139 |
|
| 140 |
static int |
| 141 |
getint2( /* get a 2-byte positive integer */ |
| 142 |
register FILE *fp |
| 143 |
) |
| 144 |
{ |
| 145 |
register int b1, b2; |
| 146 |
|
| 147 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
| 148 |
quiterr("read error"); |
| 149 |
|
| 150 |
return(b1 | b2<<8); |
| 151 |
} |
| 152 |
|
| 153 |
|
| 154 |
static void |
| 155 |
putint2( /* put a 2-byte positive integer */ |
| 156 |
register int i, |
| 157 |
register FILE *fp |
| 158 |
) |
| 159 |
{ |
| 160 |
putc(i&0xff, fp); |
| 161 |
putc(i>>8&0xff, fp); |
| 162 |
} |
| 163 |
|
| 164 |
|
| 165 |
static void |
| 166 |
quiterr( /* print message and exit */ |
| 167 |
char *err |
| 168 |
) |
| 169 |
{ |
| 170 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 171 |
exit(1); |
| 172 |
} |
| 173 |
|
| 174 |
|
| 175 |
void |
| 176 |
eputs( |
| 177 |
char *s |
| 178 |
) |
| 179 |
{ |
| 180 |
fputs(s, stderr); |
| 181 |
} |
| 182 |
|
| 183 |
|
| 184 |
void |
| 185 |
quit( |
| 186 |
int code |
| 187 |
) |
| 188 |
{ |
| 189 |
exit(code); |
| 190 |
} |
| 191 |
|
| 192 |
|
| 193 |
static int |
| 194 |
getthead( /* read header from input */ |
| 195 |
struct hdStruct *hp, |
| 196 |
char *ip, |
| 197 |
register FILE *fp |
| 198 |
) |
| 199 |
{ |
| 200 |
int nidbytes; |
| 201 |
|
| 202 |
if ((nidbytes = getc(fp)) == EOF) |
| 203 |
return(-1); |
| 204 |
hp->mapType = getc(fp); |
| 205 |
hp->dataType = getc(fp); |
| 206 |
hp->mapOrig = getint2(fp); |
| 207 |
hp->mapLength = getint2(fp); |
| 208 |
hp->CMapBits = getc(fp); |
| 209 |
hp->XOffset = getint2(fp); |
| 210 |
hp->YOffset = getint2(fp); |
| 211 |
hp->x = getint2(fp); |
| 212 |
hp->y = getint2(fp); |
| 213 |
hp->dataBits = getc(fp); |
| 214 |
hp->imType = getc(fp); |
| 215 |
|
| 216 |
if (ip != NULL) |
| 217 |
if (nidbytes) |
| 218 |
fread((char *)ip, nidbytes, 1, fp); |
| 219 |
else |
| 220 |
*ip = '\0'; |
| 221 |
else if (nidbytes) |
| 222 |
fseek(fp, (long)nidbytes, 1); |
| 223 |
|
| 224 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
| 225 |
} |
| 226 |
|
| 227 |
|
| 228 |
static int |
| 229 |
putthead( /* write header to output */ |
| 230 |
struct hdStruct *hp, |
| 231 |
char *ip, |
| 232 |
register FILE *fp |
| 233 |
) |
| 234 |
{ |
| 235 |
if (ip != NULL) |
| 236 |
putc(strlen(ip), fp); |
| 237 |
else |
| 238 |
putc(0, fp); |
| 239 |
putc(hp->mapType, fp); |
| 240 |
putc(hp->dataType, fp); |
| 241 |
putint2(hp->mapOrig, fp); |
| 242 |
putint2(hp->mapLength, fp); |
| 243 |
putc(hp->CMapBits, fp); |
| 244 |
putint2(hp->XOffset, fp); |
| 245 |
putint2(hp->YOffset, fp); |
| 246 |
putint2(hp->x, fp); |
| 247 |
putint2(hp->y, fp); |
| 248 |
putc(hp->dataBits, fp); |
| 249 |
putc(hp->imType, fp); |
| 250 |
|
| 251 |
if (ip != NULL) |
| 252 |
fputs(ip, fp); |
| 253 |
|
| 254 |
return(ferror(fp) ? -1 : 0); |
| 255 |
} |
| 256 |
|
| 257 |
|
| 258 |
static void |
| 259 |
tg2ra( /* targa file to RADIANCE file */ |
| 260 |
struct hdStruct *hp |
| 261 |
) |
| 262 |
{ |
| 263 |
COLR *scanline; |
| 264 |
unsigned char *tarData; |
| 265 |
register int i, j; |
| 266 |
/* skip color table */ |
| 267 |
if (hp->mapType == CM_HASMAP) |
| 268 |
fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
| 269 |
/* allocate targa data */ |
| 270 |
tarData = taralloc(hp); |
| 271 |
/* get data */ |
| 272 |
readtarga(hp, tarData, stdin); |
| 273 |
/* allocate input scanline */ |
| 274 |
scanline = (COLR *)emalloc(hp->x*sizeof(COLR)); |
| 275 |
/* convert file */ |
| 276 |
for (i = hp->y-1; i >= 0; i--) { |
| 277 |
if (hp->dataBits == 16) { |
| 278 |
register unsigned short *dp; |
| 279 |
dp = (unsigned short *)tarData + i*hp->x; |
| 280 |
for (j = 0; j < hp->x; j++) { |
| 281 |
scanline[j][RED] = *dp>>7 & 0xf8; |
| 282 |
scanline[j][GRN] = *dp>>2 & 0xf8; |
| 283 |
scanline[j][BLU] = *dp<<3 & 0xf8; |
| 284 |
dp++; |
| 285 |
} |
| 286 |
} else { /* hp->dataBits == 24 */ |
| 287 |
register unsigned char *dp; |
| 288 |
dp = (unsigned char *)tarData + i*3*hp->x; |
| 289 |
for (j = 0; j < hp->x; j++) { |
| 290 |
scanline[j][RED] = dp[2]; |
| 291 |
scanline[j][GRN] = dp[1]; |
| 292 |
scanline[j][BLU] = dp[0]; |
| 293 |
dp += 3; |
| 294 |
} |
| 295 |
} |
| 296 |
gambs_colrs(scanline, hp->x); |
| 297 |
if (bradj) |
| 298 |
shiftcolrs(scanline, hp->x, bradj); |
| 299 |
if (fwritecolrs(scanline, hp->x, stdout) < 0) |
| 300 |
quiterr("error writing RADIANCE file"); |
| 301 |
} |
| 302 |
free((void *)scanline); |
| 303 |
free((void *)tarData); |
| 304 |
} |
| 305 |
|
| 306 |
|
| 307 |
static void |
| 308 |
ra2tg( /* convert radiance to targa file */ |
| 309 |
struct hdStruct *hp |
| 310 |
) |
| 311 |
{ |
| 312 |
register int i, j; |
| 313 |
unsigned char *tarData; |
| 314 |
COLR *inl; |
| 315 |
/* allocate space for data */ |
| 316 |
inl = (COLR *)emalloc(hp->x*sizeof(COLR)); |
| 317 |
tarData = taralloc(hp); |
| 318 |
/* convert file */ |
| 319 |
for (j = hp->y-1; j >= 0; j--) { |
| 320 |
if (freadcolrs(inl, hp->x, stdin) < 0) |
| 321 |
quiterr("error reading RADIANCE file"); |
| 322 |
if (bradj) |
| 323 |
shiftcolrs(inl, hp->x, bradj); |
| 324 |
colrs_gambs(inl, hp->x); |
| 325 |
if (hp->dataBits == 16) { |
| 326 |
register unsigned short *dp; |
| 327 |
register int v; |
| 328 |
dp = (unsigned short *)tarData + j*hp->x; |
| 329 |
for (i = 0; i < hp->x; i++) { |
| 330 |
v = inl[i][RED] + (random()&7); |
| 331 |
if (v > 255) v = 255; |
| 332 |
*dp = (v&0xf8)<<7; |
| 333 |
v = inl[i][GRN] + (random()&7); |
| 334 |
if (v > 255) v = 255; |
| 335 |
*dp |= (v&0xf8)<<2; |
| 336 |
v = inl[i][BLU] + (random()&7); |
| 337 |
if (v > 255) v = 255; |
| 338 |
*dp++ |= v>>3; |
| 339 |
} |
| 340 |
} else { /* hp->dataBits == 24 */ |
| 341 |
register unsigned char *dp; |
| 342 |
dp = (unsigned char *)tarData + j*3*hp->x; |
| 343 |
for (i = 0; i < hp->x; i++) { |
| 344 |
*dp++ = inl[i][BLU]; |
| 345 |
*dp++ = inl[i][GRN]; |
| 346 |
*dp++ = inl[i][RED]; |
| 347 |
} |
| 348 |
} |
| 349 |
} |
| 350 |
/* write out targa data */ |
| 351 |
writetarga(hp, tarData, stdout); |
| 352 |
|
| 353 |
free((void *)inl); |
| 354 |
free((void *)tarData); |
| 355 |
} |
| 356 |
|
| 357 |
|
| 358 |
static void |
| 359 |
writet24( /* write out 24-bit targa data */ |
| 360 |
struct hdStruct *h, |
| 361 |
unsigned char *d, |
| 362 |
FILE *fp |
| 363 |
) |
| 364 |
{ |
| 365 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
| 366 |
if (fwrite((char *)d, 3*h->x, h->y, fp) != h->y) |
| 367 |
quiterr("error writing targa file"); |
| 368 |
return; |
| 369 |
} |
| 370 |
quiterr("unsupported output type"); |
| 371 |
} |
| 372 |
|
| 373 |
|
| 374 |
static void |
| 375 |
writet16( /* write out 16-bit targa data */ |
| 376 |
struct hdStruct *h, |
| 377 |
register unsigned short *d, |
| 378 |
FILE *fp |
| 379 |
) |
| 380 |
{ |
| 381 |
register int cnt; |
| 382 |
|
| 383 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
| 384 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
| 385 |
putint2(*d++, fp); |
| 386 |
if (ferror(fp)) |
| 387 |
quiterr("error writing targa file"); |
| 388 |
return; |
| 389 |
} |
| 390 |
quiterr("unsupported output type"); |
| 391 |
} |
| 392 |
|
| 393 |
|
| 394 |
static void |
| 395 |
readt24( /* read in 24-bit targa data */ |
| 396 |
register struct hdStruct *h, |
| 397 |
unsigned char *data, |
| 398 |
FILE *fp |
| 399 |
) |
| 400 |
{ |
| 401 |
register int cnt, c; |
| 402 |
register unsigned char *dp; |
| 403 |
int r, g, b; |
| 404 |
|
| 405 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
| 406 |
if (fread((char *)data, 3*h->x, h->y, fp) != h->y) |
| 407 |
goto readerr; |
| 408 |
return; |
| 409 |
} |
| 410 |
for (dp = data; dp < data+3*h->x*h->y; ) { |
| 411 |
if ((c = getc(fp)) == EOF) |
| 412 |
goto readerr; |
| 413 |
cnt = (c & 0x7f) + 1; |
| 414 |
if (c & 0x80) { /* repeated pixel */ |
| 415 |
b = getc(fp); g = getc(fp); |
| 416 |
if ((r = getc(fp)) == EOF) |
| 417 |
goto readerr; |
| 418 |
while (cnt--) { |
| 419 |
*dp++ = b; |
| 420 |
*dp++ = g; |
| 421 |
*dp++ = r; |
| 422 |
} |
| 423 |
} else /* non-repeating pixels */ |
| 424 |
while (cnt--) { |
| 425 |
*dp++ = getc(fp); *dp++ = getc(fp); |
| 426 |
if ((r = getc(fp)) == EOF) |
| 427 |
goto readerr; |
| 428 |
*dp++ = r; |
| 429 |
} |
| 430 |
} |
| 431 |
return; |
| 432 |
readerr: |
| 433 |
quiterr("error reading targa file"); |
| 434 |
} |
| 435 |
|
| 436 |
|
| 437 |
static void |
| 438 |
readt16( /* read in 16-bit targa data */ |
| 439 |
register struct hdStruct *h, |
| 440 |
unsigned short *data, |
| 441 |
FILE *fp |
| 442 |
) |
| 443 |
{ |
| 444 |
register int cnt, c; |
| 445 |
register unsigned short *dp; |
| 446 |
|
| 447 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
| 448 |
dp = data; |
| 449 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
| 450 |
*dp++ = getint2(fp); |
| 451 |
return; |
| 452 |
} |
| 453 |
for (dp = data; dp < data+h->x*h->y; ) { |
| 454 |
if ((c = getc(fp)) == EOF) |
| 455 |
goto readerr; |
| 456 |
cnt = (c & 0x7f) + 1; |
| 457 |
if (c & 0x80) { /* repeated pixel */ |
| 458 |
c = getint2(fp); |
| 459 |
while (cnt--) |
| 460 |
*dp++ = c; |
| 461 |
} else /* non-repeating pixels */ |
| 462 |
while (cnt--) |
| 463 |
*dp++ = getint2(fp); |
| 464 |
} |
| 465 |
return; |
| 466 |
readerr: |
| 467 |
quiterr("error reading targa file"); |
| 468 |
} |
