| 46 |
|
#define string(s) fputs(s, stdout) |
| 47 |
|
#define flush() fflush(stdout) |
| 48 |
|
|
| 49 |
< |
#define GAMMA 2.0 /* exponent for color correction */ |
| 49 |
> |
#define GAMMA 2.5 /* exponent for color correction */ |
| 50 |
|
|
| 51 |
< |
#define MINCOLOR 8 /* start of device color table */ |
| 51 |
> |
#define NCOLORS 248 /* our color table size */ |
| 52 |
> |
#define MINPIX 8 /* minimum hardware color */ |
| 53 |
|
|
| 53 |
– |
#define NCOLORS 241 /* our color table size (prime) */ |
| 54 |
– |
|
| 55 |
– |
#define hashcolr(c) ((67*(c)[RED]+59*(c)[GRN]+71*(c)[BLU])%NCOLORS) |
| 56 |
– |
|
| 54 |
|
#define NCOLS 512 /* maximum # columns for output */ |
| 55 |
|
#define NROWS 512-COMHT /* maximum # rows for output */ |
| 56 |
|
#define COMHT 16 /* height of command line */ |
| 57 |
|
#define COMCW 63 /* maximum chars on command line */ |
| 58 |
|
|
| 59 |
< |
static COLR colrmap[256]; /* our color map */ |
| 59 |
> |
int anewcolr(); |
| 60 |
|
|
| 64 |
– |
static COLR colrtbl[NCOLORS]; /* our color table */ |
| 65 |
– |
|
| 66 |
– |
static int colres = 64; /* color resolution */ |
| 67 |
– |
|
| 61 |
|
int aed_close(), aed_clear(), aed_paintr(), |
| 62 |
|
aed_getcur(), aed_comout(), aed_errout(); |
| 63 |
|
|
| 88 |
|
byte(BLK); byte(WHT); byte(15); |
| 89 |
|
command(SCP); |
| 90 |
|
byte('+'); byte(0); byte(1); |
| 91 |
+ |
make_cmap(GAMMA); /* make color map */ |
| 92 |
|
errvec = aed_errout; /* set error vector */ |
| 93 |
|
cmdvec = aed_errout; |
| 94 |
|
if (wrnvec != NULL) |
| 119 |
|
int x, y; |
| 120 |
|
{ |
| 121 |
|
command(FFD); |
| 122 |
+ |
new_ctab(NCOLORS, anewcolr); /* init color table */ |
| 123 |
|
flush(); |
| 129 |
– |
makemap(); /* init color map */ |
| 124 |
|
} |
| 125 |
|
|
| 126 |
|
|
| 131 |
|
{ |
| 132 |
|
int ndx; |
| 133 |
|
|
| 134 |
< |
if ((ndx = colindex(col)) < 0) { /* full table? */ |
| 135 |
< |
colres >>= 1; |
| 136 |
< |
redraw(); |
| 143 |
< |
return; |
| 144 |
< |
} |
| 145 |
< |
command(SEC); /* draw rectangle */ |
| 146 |
< |
byte(ndx+MINCOLOR); |
| 134 |
> |
ndx = get_pixel(col); /* may call anewcolr() */ |
| 135 |
> |
command(SEC); /* draw rectangle */ |
| 136 |
> |
byte(ndx+MINPIX); |
| 137 |
|
aedsetcap(xmin, ymin+COMHT); |
| 138 |
|
command(DFR); |
| 139 |
|
aedcoord(xmax-1, ymax+(-1+COMHT)); |
| 251 |
|
} |
| 252 |
|
|
| 253 |
|
|
| 264 |
– |
static int |
| 265 |
– |
colindex(col) /* return table index for color */ |
| 266 |
– |
COLOR col; |
| 267 |
– |
{ |
| 268 |
– |
static COLR clr; |
| 269 |
– |
int hval; |
| 270 |
– |
register int ndx, i; |
| 271 |
– |
|
| 272 |
– |
mapcolor(clr, col); |
| 273 |
– |
|
| 274 |
– |
hval = ndx = hashcolr(clr); |
| 275 |
– |
|
| 276 |
– |
for (i = 1; i < NCOLORS; i++) { |
| 277 |
– |
if (colrtbl[ndx][EXP] == 0) { |
| 278 |
– |
colrtbl[ndx][RED] = clr[RED]; |
| 279 |
– |
colrtbl[ndx][GRN] = clr[GRN]; |
| 280 |
– |
colrtbl[ndx][BLU] = clr[BLU]; |
| 281 |
– |
colrtbl[ndx][EXP] = COLXS; |
| 282 |
– |
newcolr(ndx, clr); |
| 283 |
– |
return(ndx); |
| 284 |
– |
} |
| 285 |
– |
if ( colrtbl[ndx][RED] == clr[RED] && |
| 286 |
– |
colrtbl[ndx][GRN] == clr[GRN] && |
| 287 |
– |
colrtbl[ndx][BLU] == clr[BLU] ) |
| 288 |
– |
return(ndx); |
| 289 |
– |
ndx = (hval + i*i) % NCOLORS; |
| 290 |
– |
} |
| 291 |
– |
return(-1); |
| 292 |
– |
} |
| 293 |
– |
|
| 294 |
– |
|
| 254 |
|
static |
| 255 |
< |
newcolr(index, clr) /* enter a color into our table */ |
| 255 |
> |
anewcolr(index, r, g, b) /* enter a color into our table */ |
| 256 |
|
int index; |
| 257 |
< |
COLR clr; |
| 257 |
> |
int r, g, b; |
| 258 |
|
{ |
| 259 |
|
command(SCT); |
| 260 |
< |
byte(index+MINCOLOR); |
| 260 |
> |
byte((index+MINPIX)&255); |
| 261 |
|
byte(1); |
| 262 |
< |
byte(clr[RED]); |
| 263 |
< |
byte(clr[GRN]); |
| 264 |
< |
byte(clr[BLU]); |
| 262 |
> |
byte(r); |
| 263 |
> |
byte(g); |
| 264 |
> |
byte(b); |
| 265 |
|
flush(); |
| 307 |
– |
} |
| 308 |
– |
|
| 309 |
– |
|
| 310 |
– |
static |
| 311 |
– |
mapcolor(clr, col) /* map to our color space */ |
| 312 |
– |
COLR clr; |
| 313 |
– |
COLOR col; |
| 314 |
– |
{ |
| 315 |
– |
register int i, p; |
| 316 |
– |
/* compute color table value */ |
| 317 |
– |
for (i = 0; i < 3; i++) { |
| 318 |
– |
p = colval(col,i) * 256.0; |
| 319 |
– |
if (p < 0) p = 0; |
| 320 |
– |
else if (p >= 256) p = 255; |
| 321 |
– |
clr[i] = colrmap[p][i]; |
| 322 |
– |
} |
| 323 |
– |
clr[EXP] = COLXS; |
| 324 |
– |
} |
| 325 |
– |
|
| 326 |
– |
|
| 327 |
– |
static |
| 328 |
– |
makemap() /* initialize the color map */ |
| 329 |
– |
{ |
| 330 |
– |
double pow(); |
| 331 |
– |
int val; |
| 332 |
– |
register int i; |
| 333 |
– |
|
| 334 |
– |
for (i = 0; i < 256; i++) { |
| 335 |
– |
val = pow(i/256.0, 1.0/GAMMA) * colres; |
| 336 |
– |
val = (val*256 + 128) / colres; |
| 337 |
– |
colrmap[i][RED] = colrmap[i][GRN] = colrmap[i][BLU] = val; |
| 338 |
– |
colrmap[i][EXP] = COLXS; |
| 339 |
– |
} |
| 340 |
– |
for (i = 0; i < NCOLORS; i++) |
| 341 |
– |
colrtbl[i][EXP] = 0; |
| 266 |
|
} |
| 267 |
|
|
| 268 |
|
|
