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 2.2 /* exponent for color correction */ |
50 |
|
|
51 |
< |
#define MINCOLOR 8 /* start of device color table */ |
51 |
> |
#define NCOLORS 244 /* 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 */ |
92 |
|
byte(BLK); byte(WHT); byte(15); |
93 |
|
command(SCP); |
94 |
|
byte('+'); byte(0); byte(1); |
95 |
+ |
make_cmap(GAMMA); /* make color map */ |
96 |
|
errvec = aed_errout; /* set error vector */ |
97 |
|
cmdvec = aed_errout; |
98 |
|
if (wrnvec != NULL) |
123 |
|
int x, y; |
124 |
|
{ |
125 |
|
command(FFD); |
126 |
< |
flush(); |
127 |
< |
makemap(); /* init color map */ |
126 |
> |
maketab(); /* init color table */ |
127 |
> |
longwait(1); |
128 |
|
} |
129 |
|
|
130 |
|
|
133 |
|
COLOR col; |
134 |
|
int xmin, ymin, xmax, ymax; |
135 |
|
{ |
138 |
– |
int ndx; |
139 |
– |
|
140 |
– |
if ((ndx = colindex(col)) < 0) { /* full table? */ |
141 |
– |
colres >>= 1; |
142 |
– |
redraw(); |
143 |
– |
return; |
144 |
– |
} |
136 |
|
command(SEC); /* draw rectangle */ |
137 |
< |
byte(ndx+MINCOLOR); |
137 |
> |
byte(get_pixel(col)+MINPIX); |
138 |
|
aedsetcap(xmin, ymin+COMHT); |
139 |
|
command(DFR); |
140 |
|
aedcoord(xmax-1, ymax+(-1+COMHT)); |
252 |
|
} |
253 |
|
|
254 |
|
|
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 |
– |
|
255 |
|
static |
256 |
< |
newcolr(index, clr) /* enter a color into our table */ |
297 |
< |
int index; |
298 |
< |
COLR clr; |
256 |
> |
maketab() /* reinitialize the color table */ |
257 |
|
{ |
258 |
< |
command(SCT); |
259 |
< |
byte(index+MINCOLOR); |
302 |
< |
byte(1); |
303 |
< |
byte(clr[RED]); |
304 |
< |
byte(clr[GRN]); |
305 |
< |
byte(clr[BLU]); |
306 |
< |
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; |
258 |
> |
extern COLR *get_ctab(); |
259 |
> |
register COLR *ctab; |
260 |
|
register int i; |
261 |
|
|
262 |
< |
for (i = 0; i < 256; i++) { |
263 |
< |
val = pow(i/256.0, 1.0/GAMMA) * colres; |
264 |
< |
val = (val*256 + 128) / colres; |
265 |
< |
colrmap[i][RED] = colrmap[i][GRN] = colrmap[i][BLU] = val; |
266 |
< |
colrmap[i][EXP] = COLXS; |
262 |
> |
ctab = get_ctab(NCOLORS); /* get colors */ |
263 |
> |
command(SCT); /* set color table */ |
264 |
> |
byte(MINPIX); /* starting index */ |
265 |
> |
byte(NCOLORS&255); /* number of colors (0==256) */ |
266 |
> |
for (i = 0; i < NCOLORS; i++) { |
267 |
> |
byte(ctab[i][RED]); |
268 |
> |
byte(ctab[i][GRN]); |
269 |
> |
byte(ctab[i][BLU]); |
270 |
|
} |
340 |
– |
for (i = 0; i < NCOLORS; i++) |
341 |
– |
colrtbl[i][EXP] = 0; |
271 |
|
} |
272 |
|
|
273 |
|
|