| 276 |
|
ra2tg(hp) /* convert radiance to targa file */ |
| 277 |
|
struct hdStruct *hp; |
| 278 |
|
{ |
| 279 |
+ |
#define map(v) (v >= 1.0 ? 1023 : (int)(v*1023.+.5)) |
| 280 |
|
unsigned char gmap[1024]; |
| 281 |
< |
register int i, j, c; |
| 281 |
> |
register int i, j; |
| 282 |
|
unsigned char *tarData; |
| 283 |
|
COLOR *inline; |
| 284 |
|
/* set up gamma correction */ |
| 285 |
< |
for (i = 0; i < 1024; i++) |
| 286 |
< |
gmap[i] = 256.*pow((i+.5)/1024., 1./gamma); |
| 285 |
> |
for (i = 0; i < 1024; i++) { |
| 286 |
> |
j = 256.*pow((i+.5)/1024., 1./gamma); |
| 287 |
> |
gmap[i] = hp->dataBits == 16 && j > 248 ? 248 : j; |
| 288 |
> |
} |
| 289 |
|
/* allocate space for data */ |
| 290 |
|
inline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
| 291 |
|
tarData = taralloc(hp); |
| 297 |
|
register unsigned short *dp; |
| 298 |
|
dp = (unsigned short *)tarData + j*hp->x; |
| 299 |
|
for (i = 0; i < hp->x; i++) { |
| 300 |
< |
c = 1024.*colval(inline[i],RED); |
| 301 |
< |
if (c > 1023) c = 1023; |
| 302 |
< |
*dp = (gmap[c] & 0xf8)<<7; |
| 303 |
< |
c = 1024.*colval(inline[i],GRN); |
| 304 |
< |
if (c > 1023) c = 1023; |
| 305 |
< |
*dp |= (gmap[c] & 0xf8)<<2; |
| 303 |
< |
c = 1024.*colval(inline[i],BLU); |
| 304 |
< |
if (c > 1023) c = 1023; |
| 305 |
< |
*dp++ |= gmap[c]>>3; |
| 300 |
> |
*dp = ((gmap[map(colval(inline[i],RED))] |
| 301 |
> |
+(random()&7)) & 0xf8)<<7; |
| 302 |
> |
*dp |= ((gmap[map(colval(inline[i],GRN))] |
| 303 |
> |
+(random()&7)) & 0xf8)<<2; |
| 304 |
> |
*dp++ |= (gmap[map(colval(inline[i],BLU))] |
| 305 |
> |
+(random()&7))>>3; |
| 306 |
|
} |
| 307 |
|
} else { /* hp->dataBits == 24 */ |
| 308 |
|
register unsigned char *dp; |
| 309 |
|
dp = (unsigned char *)tarData + j*3*hp->x; |
| 310 |
|
for (i = 0; i < hp->x; i++) { |
| 311 |
< |
c = 1024.*colval(inline[i],BLU); |
| 312 |
< |
if (c > 1023) c = 1023; |
| 313 |
< |
*dp++ = gmap[c]; |
| 314 |
< |
c = 1024.*colval(inline[i],GRN); |
| 315 |
< |
if (c > 1023) c = 1023; |
| 316 |
< |
*dp++ = gmap[c]; |
| 317 |
< |
c = 1024.*colval(inline[i],RED); |
| 318 |
< |
if (c > 1023) c = 1023; |
| 319 |
< |
*dp++ = gmap[c]; |
| 311 |
> |
*dp++ = gmap[map(colval(inline[i],BLU))]; |
| 312 |
> |
*dp++ = gmap[map(colval(inline[i],GRN))]; |
| 313 |
> |
*dp++ = gmap[map(colval(inline[i],RED))]; |
| 314 |
|
} |
| 315 |
|
} |
| 316 |
|
} |
| 319 |
|
|
| 320 |
|
free((char *)inline); |
| 321 |
|
free((char *)tarData); |
| 322 |
+ |
#undef map |
| 323 |
|
} |
| 324 |
|
|
| 325 |
|
|
