| 1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 17 |
|
|
| 18 |
|
#include "color.h" |
| 19 |
|
|
| 20 |
+ |
#include "resolu.h" |
| 21 |
+ |
|
| 22 |
|
#include "pic.h" |
| 23 |
|
|
| 24 |
|
/* descriptor for a picture file or frame buffer */ |
| 39 |
|
|
| 40 |
|
extern long ftell(); |
| 41 |
|
|
| 42 |
< |
extern double atof(), pow(); |
| 42 |
> |
extern double pow(); |
| 43 |
|
|
| 44 |
< |
double gamma = 2.0; /* gamma correction */ |
| 44 |
> |
double gamma = 2.2; /* gamma correction */ |
| 45 |
|
|
| 46 |
+ |
int bradj = 0; /* brightness adjustment */ |
| 47 |
+ |
|
| 48 |
|
pic *inpic, *outpic; |
| 49 |
|
|
| 50 |
|
char *progname; |
| 51 |
|
|
| 52 |
|
char errmsg[128]; |
| 53 |
|
|
| 54 |
< |
COLR *inline; |
| 54 |
> |
COLR *inl; |
| 55 |
|
|
| 56 |
|
int xmax, ymax; |
| 57 |
|
|
| 82 |
|
case 'b': |
| 83 |
|
greyscale = !greyscale; |
| 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 'r': |
| 91 |
|
reverse = !reverse; |
| 92 |
|
break; |
| 122 |
|
head.ras_depth != 8) |
| 123 |
|
quiterr("incompatible format"); |
| 124 |
|
/* put header */ |
| 125 |
< |
printargs(argc, argv, stdout); |
| 125 |
> |
printargs(i, argv, stdout); |
| 126 |
> |
fputformat(COLRFMT, stdout); |
| 127 |
|
putchar('\n'); |
| 128 |
< |
fputresolu(YMAJOR|YDECR, xmax, ymax, stdout); |
| 128 |
> |
fprtresolu(xmax, ymax, stdout); |
| 129 |
|
/* convert file */ |
| 130 |
|
pr2ra(&head); |
| 131 |
|
} else { |
| 132 |
< |
if (i > argc-1 || i < argc-2) |
| 132 |
> |
if (i < argc-2 || (!greyscale && i > argc-1)) |
| 133 |
|
goto userr; |
| 134 |
|
if ((inpic = openinput(argv[i], &head)) == NULL) { |
| 135 |
|
sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
| 149 |
|
quiterr(NULL); |
| 150 |
|
userr: |
| 151 |
|
fprintf(stderr, |
| 152 |
< |
"Usage: %s [-d][-c ncolors][-b][-g gamma] input [output]\n", |
| 152 |
> |
"Usage: %s [-d][-c ncolors][-b][-g gamma][-e +/-stops] input [output]\n", |
| 153 |
|
progname); |
| 154 |
< |
fprintf(stderr, " Or: %s -r [-g gamma] [input [output]]\n", |
| 154 |
> |
fprintf(stderr, " Or: %s -r [-g gamma][-e +/-stops] [input [output]]\n", |
| 155 |
|
progname); |
| 156 |
|
exit(1); |
| 157 |
|
} |
| 195 |
|
p->fp = stdin; |
| 196 |
|
else if ((p->fp = fopen(fname, "r")) == NULL) |
| 197 |
|
return(NULL); |
| 198 |
< |
/* discard header */ |
| 199 |
< |
getheader(p->fp, NULL); |
| 200 |
< |
if (fgetresolu(&xmax, &ymax, p->fp) != (YMAJOR|YDECR)) |
| 201 |
< |
quiterr("bad picture size"); |
| 198 |
> |
/* check header */ |
| 199 |
> |
if (checkheader(p->fp, COLRFMT, NULL) < 0 || |
| 200 |
> |
fgetresolu(&xmax, &ymax, p->fp) < 0) |
| 201 |
> |
quiterr("bad picture format"); |
| 202 |
|
p->nexty = 0; |
| 203 |
|
p->bytes_line = 0; /* variable length lines */ |
| 204 |
|
p->pos.y = (long *)ecalloc(ymax, sizeof(long)); |
| 213 |
|
h->ras_maptype = RMT_EQUAL_RGB; |
| 214 |
|
h->ras_maplength = 256*3; |
| 215 |
|
/* allocate scanline */ |
| 216 |
< |
inline = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 216 |
> |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 217 |
|
|
| 218 |
|
return(p); |
| 219 |
|
} |
| 261 |
|
pow((cmap[0][i]+.5)/256.,gamma), |
| 262 |
|
pow((cmap[1][i]+.5)/256.,gamma), |
| 263 |
|
pow((cmap[2][i]+.5)/256.,gamma)); |
| 264 |
+ |
if (bradj) |
| 265 |
+ |
shiftcolrs(ctab, 256, bradj); |
| 266 |
|
/* convert file */ |
| 267 |
|
for (i = 0; i < ymax; i++) { |
| 268 |
|
for (j = 0; j < xmax; j++) { |
| 289 |
|
if (inpic->bytes_line == 0) { |
| 290 |
|
if (inpic->pos.y[y] == 0) { |
| 291 |
|
while (inpic->nexty < y) { |
| 292 |
< |
if (freadcolrs(inline, xmax, inpic->fp) < 0) |
| 292 |
> |
if (freadcolrs(inl, xmax, inpic->fp) < 0) |
| 293 |
|
quiterr("read error in picreadline3"); |
| 294 |
|
inpic->pos.y[++inpic->nexty] = ftell(inpic->fp); |
| 295 |
|
} |
| 299 |
|
quiterr("seek error in picreadline3"); |
| 300 |
|
} else if (inpic->bytes_line == 0 && inpic->pos.y[inpic->nexty] == 0) |
| 301 |
|
inpic->pos.y[inpic->nexty] = ftell(inpic->fp); |
| 302 |
< |
if (freadcolrs(inline, xmax, inpic->fp) < 0) /* read scanline */ |
| 302 |
> |
if (freadcolrs(inl, xmax, inpic->fp) < 0) /* read scanline */ |
| 303 |
|
quiterr("read error in picreadline3"); |
| 304 |
|
inpic->nexty = y+1; |
| 305 |
|
/* convert scanline */ |
| 306 |
< |
normcolrs(inline, xmax); |
| 306 |
> |
normcolrs(inl, xmax, bradj); |
| 307 |
|
for (i = 0; i < xmax; i++) { |
| 308 |
< |
l3[i].r = inline[i][RED]; |
| 309 |
< |
l3[i].g = inline[i][GRN]; |
| 310 |
< |
l3[i].b = inline[i][BLU]; |
| 308 |
> |
l3[i].r = inl[i][RED]; |
| 309 |
> |
l3[i].g = inl[i][GRN]; |
| 310 |
> |
l3[i].b = inl[i][BLU]; |
| 311 |
|
} |
| 312 |
|
} |
| 313 |
|
|
| 361 |
|
register int i, val; |
| 362 |
|
|
| 363 |
|
for (i = 0; i < 256; i++) { |
| 364 |
< |
val = pow(i/256.0, 1.0/gamma) * 256.0; |
| 364 |
> |
val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
| 365 |
|
map[0][i] = map[1][i] = map[2][i] = val; |
| 366 |
|
} |
| 367 |
|
} |
