| 38 |
|
static void getmbcalfile(char *fn, struct mbc *mb); |
| 39 |
|
|
| 40 |
|
|
| 41 |
< |
extern double |
| 41 |
> |
double |
| 42 |
|
rgblum( /* compute (scotopic) luminance of RGB color */ |
| 43 |
|
COLOR clr, |
| 44 |
|
int scotopic |
| 53 |
|
} |
| 54 |
|
|
| 55 |
|
|
| 56 |
< |
extern double |
| 56 |
> |
double |
| 57 |
|
cielum( /* compute (scotopic) luminance of CIE color */ |
| 58 |
|
COLOR xyz, |
| 59 |
|
int scotopic |
| 67 |
|
} |
| 68 |
|
|
| 69 |
|
|
| 70 |
< |
extern COLOR * |
| 70 |
> |
COLOR * |
| 71 |
|
nextscan(void) /* read and condition next scanline */ |
| 72 |
|
{ |
| 73 |
|
if (nread >= numscans(&inpres)) { |
| 78 |
|
} |
| 79 |
|
if (what2do&DO_ACUITY) |
| 80 |
|
acuscan(scanbuf, nread); |
| 81 |
< |
else if (freadscan(scanbuf, scanlen(&inpres), infp) < 0) { |
| 81 |
> |
else if (fread2scan(scanbuf, scanlen(&inpres), infp, |
| 82 |
> |
NCSAMP, WLPART) < 0) { |
| 83 |
|
fprintf(stderr, "%s: %s: scanline read error\n", |
| 84 |
|
progname, infn); |
| 85 |
|
exit(1); |
| 103 |
|
} |
| 104 |
|
|
| 105 |
|
|
| 106 |
< |
extern COLOR * |
| 106 |
> |
COLOR * |
| 107 |
|
firstscan(void) /* return first processed scanline */ |
| 108 |
|
{ |
| 109 |
|
if (mbcalfile != NULL) /* load macbethcal file */ |
| 128 |
|
|
| 129 |
|
static void |
| 130 |
|
sfscan( /* apply scalefactor to scanline */ |
| 131 |
< |
register COLOR *sl, |
| 131 |
> |
COLOR *sl, |
| 132 |
|
int len, |
| 133 |
|
double sf |
| 134 |
|
) |
| 140 |
|
} |
| 141 |
|
|
| 142 |
|
|
| 143 |
+ |
static double |
| 144 |
+ |
greypoint( /* compute gamut mapping grey target */ |
| 145 |
+ |
COLOR col |
| 146 |
+ |
) |
| 147 |
+ |
{ |
| 148 |
+ |
COLOR gryc; |
| 149 |
+ |
int i; |
| 150 |
+ |
/* improves saturated color rendering */ |
| 151 |
+ |
copycolor(gryc, col); |
| 152 |
+ |
for (i = 3; i--; ) |
| 153 |
+ |
if (gryc[i] > 1) |
| 154 |
+ |
gryc[i] = 1; |
| 155 |
+ |
else if (gryc[i] < 0) |
| 156 |
+ |
gryc[i] = 0; |
| 157 |
+ |
return(bright(gryc)); |
| 158 |
+ |
} |
| 159 |
+ |
|
| 160 |
+ |
|
| 161 |
|
static void |
| 162 |
|
matscan( /* apply color matrix to scaline */ |
| 163 |
< |
register COLOR *sl, |
| 163 |
> |
COLOR *sl, |
| 164 |
|
int len, |
| 165 |
|
COLORMAT mat |
| 166 |
|
) |
| 167 |
|
{ |
| 168 |
|
while (len--) { |
| 169 |
|
colortrans(sl[0], mat, sl[0]); |
| 170 |
< |
clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); |
| 170 |
> |
clipgamut(sl[0], greypoint(sl[0]), CGAMUT, cblack, cwhite); |
| 171 |
|
sl++; |
| 172 |
|
} |
| 173 |
|
} |
| 177 |
|
mbscan( /* apply macbethcal adj. to scaline */ |
| 178 |
|
COLOR *sl, |
| 179 |
|
int len, |
| 180 |
< |
register struct mbc *mb |
| 180 |
> |
struct mbc *mb |
| 181 |
|
) |
| 182 |
|
{ |
| 183 |
|
double d; |
| 184 |
< |
register int i, j; |
| 184 |
> |
int i, j; |
| 185 |
|
|
| 186 |
|
while (len--) { |
| 187 |
|
colortrans(sl[0], mb->cmat, sl[0]); |
| 188 |
< |
clipgamut(sl[0], bright(sl[0]), CGAMUT, mb->cmin, mb->cmax); |
| 188 |
> |
clipgamut(sl[0], greypoint(sl[0]), CGAMUT, mb->cmin, mb->cmax); |
| 189 |
|
for (i = 0; i < 3; i++) { |
| 190 |
|
d = colval(sl[0],i); |
| 191 |
|
for (j = 0; j < 4 && mb->xa[i][j+1] <= d; j++) |
| 217 |
|
progname, cwarpfile); |
| 218 |
|
exit(1); |
| 219 |
|
} |
| 220 |
< |
clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); |
| 220 |
> |
clipgamut(sl[0], greypoint(sl[0]), CGAMUT, cblack, cwhite); |
| 221 |
|
sl++; |
| 222 |
|
} |
| 223 |
|
} |
| 226 |
|
static void |
| 227 |
|
getmbcalfile( /* load macbethcal file */ |
| 228 |
|
char *fn, |
| 229 |
< |
register struct mbc *mb |
| 229 |
> |
struct mbc *mb |
| 230 |
|
) |
| 231 |
|
{ |
| 232 |
|
char buf[128]; |
| 233 |
|
FILE *fp; |
| 234 |
|
int inpflags = 0; |
| 235 |
< |
register int i; |
| 235 |
> |
int i; |
| 236 |
|
|
| 237 |
|
if ((fp = fopen(fn, "r")) == NULL) |
| 238 |
|
syserror(fn); |