| 1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Radiance picture to PostScript file translator -- one way! |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
#include <math.h> |
| 13 |
#include <ctype.h> |
| 14 |
#ifdef MSDOS |
| 15 |
#include <fcntl.h> |
| 16 |
#endif |
| 17 |
#include "color.h" |
| 18 |
|
| 19 |
#define UPPER(c) ((c)&~0x20) /* ASCII trick */ |
| 20 |
|
| 21 |
#define CODE6GAM 1.47 /* gamma for 6-bit codes */ |
| 22 |
#define DEFGGAM 1.0 /* greyscale device gamma */ |
| 23 |
#define DEFCGAM 1.8 /* color device gamma */ |
| 24 |
|
| 25 |
#define GRY -1 /* artificial index for grey */ |
| 26 |
|
| 27 |
#define DEFMARG 0.5 /* default margin (inches) */ |
| 28 |
#define DEFWIDTH 8.5 /* default page width */ |
| 29 |
#define DEFHEIGHT 11 /* default page height */ |
| 30 |
#define HMARGIN (hmarg*72) /* horizontal margin */ |
| 31 |
#define VMARGIN (vmarg*72) /* vertical margin */ |
| 32 |
#define PWIDTH (width*72-2*HMARGIN) /* width of device */ |
| 33 |
#define PHEIGHT (height*72-2*VMARGIN) /* height of device */ |
| 34 |
|
| 35 |
#define RUNCHR '*' /* character to start rle */ |
| 36 |
#define MINRUN 4 /* minimum run-length */ |
| 37 |
#define RSTRT '!' /* character for MINRUN */ |
| 38 |
#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
| 39 |
|
| 40 |
char code[] = /* 6-bit code lookup table */ |
| 41 |
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
| 42 |
|
| 43 |
int wrongformat = 0; /* input in wrong format? */ |
| 44 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
| 45 |
|
| 46 |
double devgam = 0.; /* device gamma response */ |
| 47 |
double hmarg = DEFMARG, |
| 48 |
vmarg = DEFMARG; /* horizontal and vertical margins */ |
| 49 |
double width = DEFWIDTH, |
| 50 |
height = DEFHEIGHT; /* default paper width and height */ |
| 51 |
double dpi = 0; /* print density (0 if unknown) */ |
| 52 |
int docolor = 1; /* produce color image? */ |
| 53 |
int bradj = 0; /* brightness adjustment */ |
| 54 |
int ncopies = 1; /* number of copies */ |
| 55 |
|
| 56 |
extern int Aputprim(), Bputprim(), Cputprim(); |
| 57 |
|
| 58 |
int (*putprim)() = Aputprim; /* function for writing scanline */ |
| 59 |
|
| 60 |
char *progname; |
| 61 |
|
| 62 |
int xmax, ymax; /* input image dimensions */ |
| 63 |
|
| 64 |
extern char *malloc(); |
| 65 |
extern double unit2inch(); |
| 66 |
|
| 67 |
|
| 68 |
int |
| 69 |
headline(s) /* check header line */ |
| 70 |
char *s; |
| 71 |
{ |
| 72 |
char fmt[32]; |
| 73 |
|
| 74 |
if (isformat(s)) { |
| 75 |
formatval(fmt, s); |
| 76 |
wrongformat = strcmp(fmt, COLRFMT); |
| 77 |
} else if (isaspect(s)) |
| 78 |
pixaspect *= aspectval(s); |
| 79 |
return(0); |
| 80 |
} |
| 81 |
|
| 82 |
|
| 83 |
main(argc, argv) |
| 84 |
int argc; |
| 85 |
char *argv[]; |
| 86 |
{ |
| 87 |
int i; |
| 88 |
double d; |
| 89 |
|
| 90 |
progname = argv[0]; |
| 91 |
|
| 92 |
for (i = 1; i < argc; i++) |
| 93 |
if (argv[i][0] == '-') |
| 94 |
switch (argv[i][1]) { |
| 95 |
case 'b': /* produce b&w PostScript */ |
| 96 |
docolor = 0; |
| 97 |
break; |
| 98 |
case 'c': /* produce color PostScript */ |
| 99 |
docolor = 1; |
| 100 |
break; |
| 101 |
case 'A': /* standard ASCII encoding */ |
| 102 |
putprim = Aputprim; |
| 103 |
break; |
| 104 |
case 'B': /* standard binary encoding */ |
| 105 |
putprim = Bputprim; |
| 106 |
break; |
| 107 |
case 'C': /* compressed ASCII encoding */ |
| 108 |
putprim = Cputprim; |
| 109 |
break; |
| 110 |
case 'd': /* print density */ |
| 111 |
dpi = atof(argv[++i]); |
| 112 |
break; |
| 113 |
case 'g': /* device gamma adjustment */ |
| 114 |
devgam = atof(argv[++i]); |
| 115 |
break; |
| 116 |
case 'p': /* paper size */ |
| 117 |
parsepaper(argv[++i]); |
| 118 |
break; |
| 119 |
case 'm': /* margin */ |
| 120 |
d = atof(argv[i+1]); |
| 121 |
d *= unit2inch(argv[i+1]); |
| 122 |
switch (argv[i][2]) { |
| 123 |
case '\0': |
| 124 |
hmarg = vmarg = d; |
| 125 |
break; |
| 126 |
case 'h': |
| 127 |
hmarg = d; |
| 128 |
break; |
| 129 |
case 'v': |
| 130 |
vmarg = d; |
| 131 |
break; |
| 132 |
default: |
| 133 |
goto userr; |
| 134 |
} |
| 135 |
i++; |
| 136 |
break; |
| 137 |
case 'e': /* exposure adjustment */ |
| 138 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 139 |
goto userr; |
| 140 |
bradj = atoi(argv[++i]); |
| 141 |
break; |
| 142 |
case 'n': /* number of copies */ |
| 143 |
ncopies = atoi(argv[++i]); |
| 144 |
break; |
| 145 |
default: |
| 146 |
goto userr; |
| 147 |
} |
| 148 |
else |
| 149 |
break; |
| 150 |
|
| 151 |
if (i < argc-2) |
| 152 |
goto userr; |
| 153 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
| 154 |
fprintf(stderr, "%s: can't open input \"%s\"\n", |
| 155 |
progname, argv[i]); |
| 156 |
exit(1); |
| 157 |
} |
| 158 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
| 159 |
fprintf(stderr, "%s: can't open output \"%s\"\n", |
| 160 |
progname, argv[i+1]); |
| 161 |
exit(1); |
| 162 |
} |
| 163 |
#ifdef MSDOS |
| 164 |
setmode(fileno(stdin), O_BINARY); |
| 165 |
#endif |
| 166 |
/* get our header */ |
| 167 |
getheader(stdin, headline, NULL); |
| 168 |
if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0) |
| 169 |
quiterr("bad picture format"); |
| 170 |
/* gamma compression */ |
| 171 |
if (devgam <= 0.05) |
| 172 |
devgam = docolor ? DEFCGAM : DEFGGAM; |
| 173 |
if (putprim == Cputprim) |
| 174 |
setcolrgam(CODE6GAM); |
| 175 |
else if (devgam != 1.) |
| 176 |
setcolrgam(devgam); |
| 177 |
/* write header */ |
| 178 |
PSheader(argc, argv); |
| 179 |
/* convert file */ |
| 180 |
ra2ps(); |
| 181 |
/* write trailer */ |
| 182 |
PStrailer(); |
| 183 |
exit(0); |
| 184 |
userr: |
| 185 |
fprintf(stderr, |
| 186 |
"Usage: %s [-b|c][-A|B|C][-e +/-stops][-p paper][-m[h|v] margin][-d dpi][-g gamma] [input [output]]\n", |
| 187 |
progname); |
| 188 |
exit(1); |
| 189 |
} |
| 190 |
|
| 191 |
|
| 192 |
double |
| 193 |
unit2inch(s) /* determine unit */ |
| 194 |
register char *s; |
| 195 |
{ |
| 196 |
static struct unit {char n; float f;} u[] = { |
| 197 |
'i', 1., |
| 198 |
'm', 1./25.4, |
| 199 |
'c', 1./2.54, |
| 200 |
'\0' }; |
| 201 |
register struct unit *up; |
| 202 |
|
| 203 |
while (*s && !isalpha(*s)) |
| 204 |
s++; |
| 205 |
for (up = u; up->n; up++) |
| 206 |
if (up->n == *s) |
| 207 |
return(up->f); |
| 208 |
return(1.); |
| 209 |
} |
| 210 |
|
| 211 |
|
| 212 |
int |
| 213 |
matchid(name, id) /* see if name matches id (case insensitive) */ |
| 214 |
char *name; |
| 215 |
register char *id; |
| 216 |
{ |
| 217 |
register char *s = name; |
| 218 |
|
| 219 |
while (*s) { |
| 220 |
if (isalpha(*s)) { |
| 221 |
if (!isalpha(*id) || UPPER(*s) != UPPER(*id)) |
| 222 |
return(0); |
| 223 |
} else if (*s != *id) |
| 224 |
return(0); |
| 225 |
s++; id++; |
| 226 |
} |
| 227 |
return(!*id || s-name >= 3); /* substrings >= 3 chars OK */ |
| 228 |
} |
| 229 |
|
| 230 |
|
| 231 |
parsepaper(ps) /* determine paper size from name */ |
| 232 |
char *ps; |
| 233 |
{ |
| 234 |
static struct psize {char n[12]; float w,h;} p[] = { |
| 235 |
"envelope", 4.12, 9.5, |
| 236 |
"executive", 7.25, 10.5, |
| 237 |
"letter", 8.5, 11., |
| 238 |
"lettersmall", 7.68, 10.16, |
| 239 |
"legal", 8.5, 14., |
| 240 |
"monarch", 3.87, 7.5, |
| 241 |
"statement", 5.5, 8.5, |
| 242 |
"tabloid", 11., 17., |
| 243 |
"A3", 11.69, 16.54, |
| 244 |
"A4", 8.27, 11.69, |
| 245 |
"A4small", 7.47, 10.85, |
| 246 |
"A5", 6.00, 8.27, |
| 247 |
"A6", 4.13, 6.00, |
| 248 |
"B4", 10.12, 14.33, |
| 249 |
"B5", 7.17, 10.12, |
| 250 |
"C5", 6.38, 9.01, |
| 251 |
"C6", 4.49, 6.38, |
| 252 |
"DL", 4.33, 8.66, |
| 253 |
"hagaki", 3.94, 5.83, |
| 254 |
"" }; |
| 255 |
register struct psize *pp; |
| 256 |
register char *s = ps; |
| 257 |
double d; |
| 258 |
|
| 259 |
if (isdigit(*s)) { /* check for WWxHH specification */ |
| 260 |
width = atof(s); |
| 261 |
while (*s && !isalpha(*s)) |
| 262 |
s++; |
| 263 |
d = unit2inch(s); |
| 264 |
height = atof(++s); |
| 265 |
width *= d; |
| 266 |
height *= d; |
| 267 |
if (width >= 1. & height >= 1.) |
| 268 |
return; |
| 269 |
} else /* check for match to standard size */ |
| 270 |
for (pp = p; pp->n[0]; pp++) |
| 271 |
if (matchid(s, pp->n)) { |
| 272 |
width = pp->w; |
| 273 |
height = pp->h; |
| 274 |
return; |
| 275 |
} |
| 276 |
fprintf(stderr, "%s: unknown paper size \"%s\" -- known sizes:\n", |
| 277 |
progname, ps); |
| 278 |
fprintf(stderr, "_Name________Width_Height_(inches)\n"); |
| 279 |
for (pp = p; pp->n[0]; pp++) |
| 280 |
fprintf(stderr, "%-11s %5.2f %5.2f\n", pp->n, pp->w, pp->h); |
| 281 |
fprintf(stderr, "Or use WWxHH size specification\n"); |
| 282 |
exit(1); |
| 283 |
} |
| 284 |
|
| 285 |
|
| 286 |
quiterr(err) /* print message and exit */ |
| 287 |
char *err; |
| 288 |
{ |
| 289 |
if (err != NULL) { |
| 290 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 291 |
exit(1); |
| 292 |
} |
| 293 |
exit(0); |
| 294 |
} |
| 295 |
|
| 296 |
|
| 297 |
PSheader(ac, av) /* print PostScript header */ |
| 298 |
int ac; |
| 299 |
char **av; |
| 300 |
{ |
| 301 |
char *rstr; |
| 302 |
int landscape, rotate, n; |
| 303 |
double pwidth, pheight; |
| 304 |
double iwidth, iheight; |
| 305 |
/* EPS comments */ |
| 306 |
puts("%!PS-Adobe-2.0 EPSF-2.0"); |
| 307 |
printf("%%%%Title: "); printargs(ac, av, stdout); |
| 308 |
printf("%%%%Creator: %s\n", SCCSid); |
| 309 |
printf("%%%%Pages: %d\n", ncopies); |
| 310 |
if (landscape = xmax > pixaspect*ymax) |
| 311 |
puts("%%Orientation: Landscape"); |
| 312 |
else |
| 313 |
puts("%%Orientation: Portrait"); |
| 314 |
if (rotate = PWIDTH > PHEIGHT ^ landscape) { |
| 315 |
pwidth = PHEIGHT; |
| 316 |
pheight = PWIDTH; |
| 317 |
} else { |
| 318 |
pwidth = PWIDTH; |
| 319 |
pheight = PHEIGHT; |
| 320 |
} |
| 321 |
if (dpi > 100 && pixaspect >= 0.99 & pixaspect <= 1.01) |
| 322 |
if (pheight/pwidth > ymax/xmax) { |
| 323 |
n = pwidth*dpi/xmax; /* floor */ |
| 324 |
iwidth = n > 0 ? (double)(n*xmax)/dpi : pwidth; |
| 325 |
iheight = iwidth*ymax/xmax; |
| 326 |
} else { |
| 327 |
n = pheight*dpi/ymax; /* floor */ |
| 328 |
iheight = n > 0 ? (double)(n*ymax)/dpi : pheight; |
| 329 |
iwidth = iheight*xmax/ymax; |
| 330 |
} |
| 331 |
else |
| 332 |
if (pheight/pwidth > pixaspect*ymax/xmax) { |
| 333 |
iwidth = pwidth; |
| 334 |
iheight = iwidth*pixaspect*ymax/xmax; |
| 335 |
} else { |
| 336 |
iheight = pheight; |
| 337 |
iwidth = iheight*xmax/(pixaspect*ymax); |
| 338 |
} |
| 339 |
if (rotate) |
| 340 |
printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
| 341 |
HMARGIN+(pheight-iheight)*.5, |
| 342 |
VMARGIN+(pwidth-iwidth)*.5, |
| 343 |
HMARGIN+(pheight-iheight)*.5+iheight, |
| 344 |
VMARGIN+(pwidth-iwidth)*.5+iwidth); |
| 345 |
else |
| 346 |
printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
| 347 |
HMARGIN+(pwidth-iwidth)*.5, |
| 348 |
VMARGIN+(pheight-iheight)*.5, |
| 349 |
HMARGIN+(pwidth-iwidth)*.5+iwidth, |
| 350 |
VMARGIN+(pheight-iheight)*.5+iheight); |
| 351 |
puts("%%EndComments"); |
| 352 |
puts("gsave save"); |
| 353 |
puts("17 dict begin"); |
| 354 |
/* define image reader */ |
| 355 |
if (docolor) { |
| 356 |
printf("/redline %d string def\n", xmax); |
| 357 |
printf("/grnline %d string def\n", xmax); |
| 358 |
printf("/bluline %d string def\n", xmax); |
| 359 |
} else |
| 360 |
printf("/gryline %d string def\n", xmax); |
| 361 |
/* use compressed encoding? */ |
| 362 |
if (putprim == Cputprim) |
| 363 |
PSprocdef("read6bitRLE"); |
| 364 |
/* set up transformation matrix */ |
| 365 |
printf("%f %f translate\n", HMARGIN, VMARGIN); |
| 366 |
if (rotate) { |
| 367 |
printf("%f 0 translate\n", PWIDTH); |
| 368 |
puts("90 rotate"); |
| 369 |
} |
| 370 |
printf("%f %f translate\n", (pwidth-iwidth)*.5, (pheight-iheight)*.5); |
| 371 |
printf("%f %f scale\n", iwidth, iheight); |
| 372 |
puts("%%EndProlog"); |
| 373 |
/* start image procedure */ |
| 374 |
printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax); |
| 375 |
if (putprim == Cputprim) { |
| 376 |
if (docolor) { |
| 377 |
puts("{redline read6bitRLE}"); |
| 378 |
puts("{grnline read6bitRLE}"); |
| 379 |
puts("{bluline read6bitRLE}"); |
| 380 |
puts("true 3 colorimage"); |
| 381 |
} else |
| 382 |
puts("{gryline read6bitRLE} image"); |
| 383 |
} else { |
| 384 |
rstr = putprim==Aputprim ? "readhexstring" : "readstring"; |
| 385 |
if (docolor) { |
| 386 |
printf("{currentfile redline %s pop}\n", rstr); |
| 387 |
printf("{currentfile grnline %s pop}\n", rstr); |
| 388 |
printf("{currentfile bluline %s pop}\n", rstr); |
| 389 |
puts("true 3 colorimage"); |
| 390 |
} else |
| 391 |
printf("{currentfile gryline %s pop} image\n", rstr); |
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
|
| 396 |
PStrailer() /* print PostScript trailer */ |
| 397 |
{ |
| 398 |
puts("%%Trailer"); |
| 399 |
if (ncopies > 1) |
| 400 |
printf("/#copies %d def\n", ncopies); |
| 401 |
puts("showpage"); |
| 402 |
puts("end"); |
| 403 |
puts("restore grestore"); |
| 404 |
puts("%%EOF"); |
| 405 |
} |
| 406 |
|
| 407 |
|
| 408 |
PSprocdef(nam) /* define PS procedure to read image */ |
| 409 |
char *nam; |
| 410 |
{ |
| 411 |
short itab[128]; |
| 412 |
register int i; |
| 413 |
/* assign code values */ |
| 414 |
for (i = 0; i < 128; i++) /* clear */ |
| 415 |
itab[i] = -1; |
| 416 |
for (i = 1; i < 63; i++) /* assign greys */ |
| 417 |
itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam); |
| 418 |
itab[code[0]] = 0; /* black is black */ |
| 419 |
itab[code[63]] = 255; /* and white is white */ |
| 420 |
printf("/codetab ["); |
| 421 |
for (i = 0; i < 128; i++) { |
| 422 |
if (!(i & 0xf)) |
| 423 |
putchar('\n'); |
| 424 |
printf(" %3d", itab[i]); |
| 425 |
} |
| 426 |
printf("\n] def\n"); |
| 427 |
printf("/nrept 0 def\n"); |
| 428 |
printf("/readbyte { currentfile read not {stop} if } bind def\n"); |
| 429 |
printf("/decode { codetab exch get } bind def\n"); |
| 430 |
printf("/%s {\t%% scanbuffer\n", nam); |
| 431 |
printf("\t/scanline exch def\n"); |
| 432 |
printf("\t{ 0 1 %d { scanline exch\n", xmax-1); |
| 433 |
printf("\t\tnrept 0 le\n"); |
| 434 |
printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR); |
| 435 |
printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1); |
| 436 |
printf("\t\t\t\t\t\t/reptv readbyte decode def\n"); |
| 437 |
printf("\t\t\t\t\t\treptv exit }\n"); |
| 438 |
printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n"); |
| 439 |
printf("\t\t\t\tifelse } loop }\n"); |
| 440 |
printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n"); |
| 441 |
printf("\t\tifelse put\n"); |
| 442 |
printf("\t\t} for\n"); |
| 443 |
printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
| 444 |
printf("} bind def\n"); |
| 445 |
} |
| 446 |
|
| 447 |
|
| 448 |
ra2ps() /* convert Radiance scanlines to 6-bit */ |
| 449 |
{ |
| 450 |
register COLR *scanin; |
| 451 |
int y; |
| 452 |
/* allocate scanline */ |
| 453 |
scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
| 454 |
if (scanin == NULL) |
| 455 |
quiterr("out of memory in ra2ps"); |
| 456 |
/* convert image */ |
| 457 |
for (y = ymax-1; y >= 0; y--) { |
| 458 |
if (freadcolrs(scanin, xmax, stdin) < 0) |
| 459 |
quiterr("error reading Radiance picture"); |
| 460 |
if (putprim == Cputprim || devgam != 1.) { |
| 461 |
if (bradj) /* adjust exposure */ |
| 462 |
shiftcolrs(scanin, xmax, bradj); |
| 463 |
colrs_gambs(scanin, xmax); /* gamma compression */ |
| 464 |
} else |
| 465 |
normcolrs(scanin, xmax, bradj); |
| 466 |
if (docolor) { |
| 467 |
(*putprim)(scanin, RED); |
| 468 |
(*putprim)(scanin, GRN); |
| 469 |
(*putprim)(scanin, BLU); |
| 470 |
} else |
| 471 |
(*putprim)(scanin, GRY); |
| 472 |
if (ferror(stdout)) |
| 473 |
quiterr("error writing PostScript file"); |
| 474 |
} |
| 475 |
putchar('\n'); |
| 476 |
/* free scanline */ |
| 477 |
free((char *)scanin); |
| 478 |
} |
| 479 |
|
| 480 |
|
| 481 |
int |
| 482 |
Aputprim(scn, pri) /* put out hex ASCII primary from scanline */ |
| 483 |
COLR *scn; |
| 484 |
int pri; |
| 485 |
{ |
| 486 |
static char hexdigit[] = "0123456789ABCDEF"; |
| 487 |
static int col = 0; |
| 488 |
register int x, c; |
| 489 |
|
| 490 |
for (x = 0; x < xmax; x++) { |
| 491 |
if (pri == GRY) |
| 492 |
c = normbright(scn[x]); |
| 493 |
else |
| 494 |
c = scn[x][pri]; |
| 495 |
if (c > 255) c = 255; |
| 496 |
putchar(hexdigit[c>>4]); |
| 497 |
putchar(hexdigit[c&0xf]); |
| 498 |
if ((col += 2) >= 72) { |
| 499 |
putchar('\n'); |
| 500 |
col = 0; |
| 501 |
} |
| 502 |
} |
| 503 |
} |
| 504 |
|
| 505 |
|
| 506 |
int |
| 507 |
Bputprim(scn, pri) /* put out binary primary from scanline */ |
| 508 |
COLR *scn; |
| 509 |
int pri; |
| 510 |
{ |
| 511 |
register int x, c; |
| 512 |
|
| 513 |
for (x = 0; x < xmax; x++) { |
| 514 |
if (pri == GRY) |
| 515 |
c = normbright(scn[x]); |
| 516 |
else |
| 517 |
c = scn[x][pri]; |
| 518 |
if (c > 255) c = 255; |
| 519 |
putchar(c); |
| 520 |
} |
| 521 |
} |
| 522 |
|
| 523 |
|
| 524 |
int |
| 525 |
Cputprim(scn, pri) /* put out compressed primary from scanline */ |
| 526 |
COLR *scn; |
| 527 |
int pri; |
| 528 |
{ |
| 529 |
register int c; |
| 530 |
register int x; |
| 531 |
int lastc, cnt; |
| 532 |
|
| 533 |
lastc = -1; cnt = 0; |
| 534 |
for (x = 0; x < xmax; x++) { |
| 535 |
if (pri == GRY) |
| 536 |
c = normbright(scn[x]) + 2; |
| 537 |
else |
| 538 |
c = scn[x][pri] + 2; |
| 539 |
if (c > 255) c = 255; |
| 540 |
c = code[c>>2]; |
| 541 |
if (c == lastc && cnt < MAXRUN) |
| 542 |
cnt++; |
| 543 |
else { |
| 544 |
putrle(cnt, lastc); |
| 545 |
lastc = c; |
| 546 |
cnt = 1; |
| 547 |
} |
| 548 |
} |
| 549 |
putrle(cnt, lastc); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
putrle(cnt, cod) /* put out cnt of cod */ |
| 554 |
register int cnt, cod; |
| 555 |
{ |
| 556 |
static int col = 0; |
| 557 |
|
| 558 |
if (cnt >= MINRUN) { |
| 559 |
col += 3; |
| 560 |
putchar(RUNCHR); |
| 561 |
putchar(RSTRT-MINRUN+cnt); |
| 562 |
putchar(cod); |
| 563 |
} else { |
| 564 |
col += cnt; |
| 565 |
while (cnt-- > 0) |
| 566 |
putchar(cod); |
| 567 |
} |
| 568 |
if (col >= 72) { |
| 569 |
putchar('\n'); |
| 570 |
col = 0; |
| 571 |
} |
| 572 |
} |
