| 13 |
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#include <fcntl.h> |
| 14 |
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#endif |
| 15 |
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#include "color.h" |
| 16 |
– |
#include "random.h" |
| 16 |
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|
| 17 |
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#define HMARGIN (.5*72) /* horizontal margin */ |
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#define VMARGIN (.5*72) /* vertical margin */ |
| 19 |
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#define PWIDTH (8.5*72-2*HMARGIN) /* width of device */ |
| 20 |
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#define PHEIGHT (11*72-2*VMARGIN) /* height of device */ |
| 21 |
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|
| 22 |
+ |
#define RUNCHR '*' /* character to start rle */ |
| 23 |
+ |
#define MINRUN 4 /* minimum run-length */ |
| 24 |
+ |
#define RSTRT '!' /* character for MINRUN */ |
| 25 |
+ |
#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
| 26 |
+ |
|
| 27 |
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char code[] = /* 6-bit code lookup table */ |
| 28 |
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
| 29 |
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|
| 139 |
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printf("%%%%EndComments\n"); |
| 140 |
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printf("64 dict begin\n"); |
| 141 |
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/* define image reader */ |
| 142 |
< |
PSprocdef("read6bit"); |
| 142 |
> |
PSprocdef("read6bitRLE"); |
| 143 |
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/* set up transformation matrix */ |
| 144 |
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printf("%f %f translate\n", HMARGIN, VMARGIN); |
| 145 |
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if (PWIDTH > PHEIGHT ^ landscape) { |
| 162 |
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printf("%f %f scale\n", iwidth, iheight); |
| 163 |
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printf("%%%%EndProlog\n"); |
| 164 |
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/* start image procedure */ |
| 165 |
< |
printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bit} image", xmax, ymax, |
| 165 |
> |
printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bitRLE} image\n", xmax, ymax, |
| 166 |
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xmax, -ymax, ymax); |
| 167 |
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} |
| 168 |
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|
| 190 |
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itab[code[i]] = i<<2 | 2; |
| 191 |
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itab[code[0]] = 0; /* black is black */ |
| 192 |
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itab[code[63]] = 255; /* and white is white */ |
| 193 |
< |
printf("/decode ["); |
| 193 |
> |
printf("/codetab ["); |
| 194 |
|
for (i = 0; i < 128; i++) { |
| 195 |
|
if (!(i & 0xf)) |
| 196 |
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putchar('\n'); |
| 198 |
|
} |
| 199 |
|
printf("\n] def\n"); |
| 200 |
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printf("/scanline %d string def\n", xmax); |
| 201 |
+ |
printf("/nrept 0 def\n"); |
| 202 |
+ |
printf("/readbyte { currentfile read not {stop} if } def\n"); |
| 203 |
+ |
printf("/decode { codetab exch get } def\n"); |
| 204 |
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printf("/%s {\n", nam); |
| 205 |
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printf("\t{ 0 1 %d { scanline exch\n", xmax-1); |
| 206 |
< |
printf("\t\t{ decode currentfile read not {stop} if get\n"); |
| 207 |
< |
printf("\tdup 0 lt {pop} {exit} ifelse } loop put } for\n"); |
| 208 |
< |
printf("\t} stopped {pop pop pop 0 string} {scanline} ifelse\n"); |
| 206 |
> |
printf("\t\tnrept 0 le\n"); |
| 207 |
> |
printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR); |
| 208 |
> |
printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1); |
| 209 |
> |
printf("\t\t\t\t\t\t/reptv readbyte decode def\n"); |
| 210 |
> |
printf("\t\t\t\t\t\treptv exit }\n"); |
| 211 |
> |
printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n"); |
| 212 |
> |
printf("\t\t\t\tifelse } loop }\n"); |
| 213 |
> |
printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n"); |
| 214 |
> |
printf("\t\tifelse put\n"); |
| 215 |
> |
printf("\t\t} for\n"); |
| 216 |
> |
printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
| 217 |
|
printf("} bind def\n"); |
| 218 |
|
} |
| 219 |
|
|
| 220 |
|
|
| 221 |
|
ra2ps() /* convert Radiance scanlines to 6-bit */ |
| 222 |
|
{ |
| 223 |
< |
COLR *scanin; |
| 209 |
< |
register int col = 0; |
| 223 |
> |
register COLR *scanin; |
| 224 |
|
register int c; |
| 225 |
+ |
int lastc, cnt; |
| 226 |
|
register int x; |
| 227 |
|
int y; |
| 228 |
|
/* allocate scanline */ |
| 234 |
|
if (freadcolrs(scanin, xmax, stdin) < 0) |
| 235 |
|
quiterr("error reading Radiance picture"); |
| 236 |
|
normcolrs(scanin, xmax, bradj); /* normalize */ |
| 237 |
+ |
lastc = -1; cnt = 0; |
| 238 |
|
for (x = 0; x < xmax; x++) { |
| 239 |
< |
if (!(col++ & 0x3f)) |
| 224 |
< |
putchar('\n'); |
| 225 |
< |
c = normbright(scanin[x]) + (random()&3); |
| 239 |
> |
c = normbright(scanin[x]) + 2; |
| 240 |
|
if (c > 255) c = 255; |
| 241 |
< |
putchar(code[c>>2]); |
| 241 |
> |
c = code[c>>2]; |
| 242 |
> |
if (c == lastc && cnt < MAXRUN) |
| 243 |
> |
cnt++; |
| 244 |
> |
else { |
| 245 |
> |
putrle(cnt, lastc); |
| 246 |
> |
lastc = c; |
| 247 |
> |
cnt = 1; |
| 248 |
> |
} |
| 249 |
|
} |
| 250 |
+ |
putrle(cnt, lastc); |
| 251 |
|
if (ferror(stdout)) |
| 252 |
|
quiterr("error writing PostScript file"); |
| 253 |
|
} |
| 254 |
|
putchar('\n'); |
| 255 |
|
/* free scanline */ |
| 256 |
|
free((char *)scanin); |
| 257 |
+ |
} |
| 258 |
+ |
|
| 259 |
+ |
|
| 260 |
+ |
putrle(cnt, cod) /* put out cnt of cod */ |
| 261 |
+ |
register int cnt, cod; |
| 262 |
+ |
{ |
| 263 |
+ |
static int col = 0; |
| 264 |
+ |
|
| 265 |
+ |
if (cnt >= MINRUN) { |
| 266 |
+ |
col += 3; |
| 267 |
+ |
putchar(RUNCHR); |
| 268 |
+ |
putchar(RSTRT-MINRUN+cnt); |
| 269 |
+ |
putchar(cod); |
| 270 |
+ |
} else { |
| 271 |
+ |
col += cnt; |
| 272 |
+ |
while (cnt-- > 0) |
| 273 |
+ |
putchar(cod); |
| 274 |
+ |
} |
| 275 |
+ |
if (col >= 72) { |
| 276 |
+ |
putchar('\n'); |
| 277 |
+ |
col = 0; |
| 278 |
+ |
} |
| 279 |
|
} |
