41 |
|
|
42 |
|
extern long ftell(); |
43 |
|
|
44 |
< |
double gamma = 2.2; /* gamma correction */ |
44 |
> |
double gamcor = 2.2; /* gamma correction */ |
45 |
|
|
46 |
|
int bradj = 0; /* brightness adjustment */ |
47 |
|
|
77 |
|
dither = !dither; |
78 |
|
break; |
79 |
|
case 'g': |
80 |
< |
gamma = atof(argv[++i]); |
80 |
> |
gamcor = atof(argv[++i]); |
81 |
|
break; |
82 |
|
case 'b': |
83 |
|
greyscale = !greyscale; |
122 |
|
head.ras_depth != 8) |
123 |
|
quiterr("incompatible format"); |
124 |
|
/* put header */ |
125 |
+ |
newheader("RADIANCE", stdout); |
126 |
|
printargs(i, argv, stdout); |
127 |
|
fputformat(COLRFMT, stdout); |
128 |
|
putchar('\n'); |
259 |
|
/* convert table */ |
260 |
|
for (i = 0; i < h->ras_maplength/3; i++) |
261 |
|
setcolr(ctab[i], |
262 |
< |
pow((cmap[0][i]+.5)/256.,gamma), |
263 |
< |
pow((cmap[1][i]+.5)/256.,gamma), |
264 |
< |
pow((cmap[2][i]+.5)/256.,gamma)); |
262 |
> |
pow((cmap[0][i]+.5)/256.,gamcor), |
263 |
> |
pow((cmap[1][i]+.5)/256.,gamcor), |
264 |
> |
pow((cmap[2][i]+.5)/256.,gamcor)); |
265 |
|
if (bradj) |
266 |
|
shiftcolrs(ctab, 256, bradj); |
267 |
|
/* convert file */ |
362 |
|
register int i, val; |
363 |
|
|
364 |
|
for (i = 0; i < 256; i++) { |
365 |
< |
val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
365 |
> |
val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
366 |
|
map[0][i] = map[1][i] = map[2][i] = val; |
367 |
|
} |
368 |
|
} |