| 1 |
/* Copyright (c) 1990 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* x11image.c - driver for X-windows |
| 9 |
* |
| 10 |
* 3/1/90 |
| 11 |
*/ |
| 12 |
|
| 13 |
/* |
| 14 |
* Modified for X11 |
| 15 |
* |
| 16 |
* January 1990 |
| 17 |
* |
| 18 |
* Anat Grynberg and Greg Ward |
| 19 |
*/ |
| 20 |
|
| 21 |
|
| 22 |
#include "standard.h" |
| 23 |
|
| 24 |
#include <X11/Xlib.h> |
| 25 |
#include <X11/cursorfont.h> |
| 26 |
#include <X11/Xutil.h> |
| 27 |
|
| 28 |
#include "color.h" |
| 29 |
#include "view.h" |
| 30 |
#include "pic.h" |
| 31 |
#include "x11raster.h" |
| 32 |
#include "random.h" |
| 33 |
|
| 34 |
#define FONTNAME "8x13" /* text font we'll use */ |
| 35 |
|
| 36 |
#define CTRL(c) ('c'-'@') |
| 37 |
|
| 38 |
#define BORWIDTH 5 /* border width */ |
| 39 |
|
| 40 |
#define ourscreen DefaultScreen(thedisplay) |
| 41 |
#define ourblack BlackPixel(thedisplay,ourscreen) |
| 42 |
#define ourwhite WhitePixel(thedisplay,ourscreen) |
| 43 |
#define ourroot RootWindow(thedisplay,ourscreen) |
| 44 |
#define ourgc DefaultGC(thedisplay,ourscreen) |
| 45 |
|
| 46 |
double gamcor = 2.2; /* gamma correction */ |
| 47 |
|
| 48 |
int dither = 1; /* dither colors? */ |
| 49 |
int fast = 0; /* keep picture in Pixmap? */ |
| 50 |
|
| 51 |
Window wind = 0; /* our output window */ |
| 52 |
Font fontid; /* our font */ |
| 53 |
|
| 54 |
long maxcolors = 0; /* maximum colors */ |
| 55 |
int greyscale = 0; /* in grey */ |
| 56 |
|
| 57 |
int scale = 0; /* scalefactor; power of two */ |
| 58 |
|
| 59 |
int xoff = 0; /* x image offset */ |
| 60 |
int yoff = 0; /* y image offset */ |
| 61 |
|
| 62 |
VIEW ourview = STDVIEW; /* image view parameters */ |
| 63 |
int gotview = 0; /* got parameters from file */ |
| 64 |
|
| 65 |
COLR *scanline; /* scan line buffer */ |
| 66 |
|
| 67 |
int xmax, ymax; /* picture resolution */ |
| 68 |
int width, height; /* window size */ |
| 69 |
char *fname = NULL; /* input file name */ |
| 70 |
FILE *fin = stdin; /* input file */ |
| 71 |
long *scanpos = NULL; /* scan line positions in file */ |
| 72 |
int cury = 0; /* current scan location */ |
| 73 |
|
| 74 |
double exposure = 1.0; /* exposure compensation used */ |
| 75 |
|
| 76 |
XRASTER *ourras; /* our stored image */ |
| 77 |
unsigned char *ourdata; /* our image data */ |
| 78 |
|
| 79 |
struct { |
| 80 |
int xmin, ymin, xsiz, ysiz; |
| 81 |
} box = {0, 0, 0, 0}; /* current box */ |
| 82 |
|
| 83 |
char *geometry = NULL; /* geometry specification */ |
| 84 |
|
| 85 |
char *progname; |
| 86 |
|
| 87 |
char errmsg[128]; |
| 88 |
|
| 89 |
extern long ftell(); |
| 90 |
|
| 91 |
extern char *malloc(), *calloc(); |
| 92 |
|
| 93 |
extern double atof(), pow(), log(); |
| 94 |
|
| 95 |
Display *thedisplay; |
| 96 |
|
| 97 |
main(argc, argv) |
| 98 |
int argc; |
| 99 |
char *argv[]; |
| 100 |
{ |
| 101 |
int headline(); |
| 102 |
int i; |
| 103 |
|
| 104 |
progname = argv[0]; |
| 105 |
|
| 106 |
for (i = 1; i < argc; i++) |
| 107 |
if (argv[i][0] == '-') |
| 108 |
switch (argv[i][1]) { |
| 109 |
case 'c': |
| 110 |
maxcolors = atoi(argv[++i]); |
| 111 |
break; |
| 112 |
case 'b': |
| 113 |
greyscale = !greyscale; |
| 114 |
break; |
| 115 |
case 'm': |
| 116 |
maxcolors = 2; |
| 117 |
break; |
| 118 |
case 'd': |
| 119 |
dither = !dither; |
| 120 |
break; |
| 121 |
case 'f': |
| 122 |
fast = !fast; |
| 123 |
break; |
| 124 |
case 'e': |
| 125 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 126 |
goto userr; |
| 127 |
scale = atoi(argv[++i]); |
| 128 |
break; |
| 129 |
case 'g': |
| 130 |
if (!strcmp(argv[i], "-geometry")) |
| 131 |
geometry = argv[++i]; |
| 132 |
else |
| 133 |
gamcor = atof(argv[++i]); |
| 134 |
break; |
| 135 |
default: |
| 136 |
goto userr; |
| 137 |
} |
| 138 |
else |
| 139 |
break; |
| 140 |
|
| 141 |
if (argc-i == 1) { |
| 142 |
fname = argv[i]; |
| 143 |
fin = fopen(fname, "r"); |
| 144 |
if (fin == NULL) { |
| 145 |
sprintf(errmsg, "can't open file \"%s\"", fname); |
| 146 |
quiterr(errmsg); |
| 147 |
} |
| 148 |
} |
| 149 |
/* get header */ |
| 150 |
getheader(fin, headline); |
| 151 |
/* get picture dimensions */ |
| 152 |
if (fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
| 153 |
quiterr("bad picture size"); |
| 154 |
/* set view parameters */ |
| 155 |
if (gotview && setview(&ourview) != NULL) |
| 156 |
gotview = 0; |
| 157 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
| 158 |
quiterr("out of memory"); |
| 159 |
|
| 160 |
init(); /* get file and open window */ |
| 161 |
|
| 162 |
for ( ; ; ) |
| 163 |
getevent(); /* main loop */ |
| 164 |
userr: |
| 165 |
fprintf(stderr, |
| 166 |
"Usage: %s [-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
| 167 |
progname); |
| 168 |
quit(1); |
| 169 |
} |
| 170 |
|
| 171 |
|
| 172 |
headline(s) /* get relevant info from header */ |
| 173 |
char *s; |
| 174 |
{ |
| 175 |
static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
| 176 |
register char **an; |
| 177 |
|
| 178 |
if (!strncmp(s, "EXPOSURE=", 9)) |
| 179 |
exposure *= atof(s+9); |
| 180 |
else |
| 181 |
for (an = altname; *an != NULL; an++) |
| 182 |
if (!strncmp(*an, s, strlen(*an))) { |
| 183 |
if (sscanview(&ourview, s+strlen(*an)) == 0) |
| 184 |
gotview++; |
| 185 |
return; |
| 186 |
} |
| 187 |
} |
| 188 |
|
| 189 |
|
| 190 |
init() /* get data and open window */ |
| 191 |
{ |
| 192 |
XSizeHints oursizhints; |
| 193 |
register int i; |
| 194 |
|
| 195 |
if (fname != NULL) { |
| 196 |
scanpos = (long *)malloc(ymax*sizeof(long)); |
| 197 |
if (scanpos == NULL) |
| 198 |
goto memerr; |
| 199 |
for (i = 0; i < ymax; i++) |
| 200 |
scanpos[i] = -1; |
| 201 |
} |
| 202 |
if ((thedisplay = XOpenDisplay(NULL)) == NULL) |
| 203 |
quiterr("can't open display; DISPLAY variable set?"); |
| 204 |
wind = XCreateSimpleWindow(thedisplay, |
| 205 |
ourroot, 0, 0, xmax, ymax, BORWIDTH, ourblack, ourwhite); |
| 206 |
if (wind == 0) |
| 207 |
quiterr("can't create window"); |
| 208 |
if (maxcolors == 0) { /* get number of available colors */ |
| 209 |
maxcolors = 1<<DisplayPlanes(thedisplay,ourscreen); |
| 210 |
if (maxcolors > 4) maxcolors -= 2; |
| 211 |
} |
| 212 |
fontid = XLoadFont(thedisplay, FONTNAME); |
| 213 |
if (fontid == 0) |
| 214 |
quiterr("can't get font"); |
| 215 |
XSetFont(thedisplay, ourgc, fontid); |
| 216 |
XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
| 217 |
XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
| 218 |
XC_diamond_cross)); |
| 219 |
if (geometry != NULL) { |
| 220 |
bzero((char *)&oursizhints, sizeof(oursizhints)); |
| 221 |
i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
| 222 |
&oursizhints.width, &oursizhints.height); |
| 223 |
if (i & (XValue|YValue) == (XValue|YValue)) { |
| 224 |
oursizhints.flags |= USPosition; |
| 225 |
if (i & XNegative) |
| 226 |
oursizhints.x += DisplayWidth(thedisplay,ourscreen)-1; |
| 227 |
if (i & YNegative) |
| 228 |
oursizhints.y += DisplayHeight(thedisplay,ourscreen)-1; |
| 229 |
} |
| 230 |
if (i & (WidthValue|HeightValue) == (WidthValue|HeightValue)) |
| 231 |
oursizhints.flags |= USSize; |
| 232 |
XSetNormalHints(thedisplay, wind, &oursizhints); |
| 233 |
} |
| 234 |
/* store image */ |
| 235 |
getras(); |
| 236 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask| |
| 237 |
StructureNotifyMask|ButtonMotionMask| |
| 238 |
KeyPressMask|ExposureMask); |
| 239 |
XMapWindow(thedisplay, wind); |
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return; |
| 241 |
memerr: |
| 242 |
quiterr("out of memory"); |
| 243 |
} /* end of init */ |
| 244 |
|
| 245 |
|
| 246 |
quiterr(err) /* print message and exit */ |
| 247 |
char *err; |
| 248 |
{ |
| 249 |
if (err != NULL) { |
| 250 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 251 |
exit(1); |
| 252 |
} |
| 253 |
exit(0); |
| 254 |
} |
| 255 |
|
| 256 |
|
| 257 |
eputs(s) |
| 258 |
char *s; |
| 259 |
{ |
| 260 |
fputs(s, stderr); |
| 261 |
} |
| 262 |
|
| 263 |
|
| 264 |
quit(code) |
| 265 |
int code; |
| 266 |
{ |
| 267 |
exit(code); |
| 268 |
} |
| 269 |
|
| 270 |
|
| 271 |
getras() /* get raster file */ |
| 272 |
{ |
| 273 |
colormap ourmap; |
| 274 |
unsigned char rmap[256], gmap[256], bmap[256]; |
| 275 |
XVisualInfo vinfo; |
| 276 |
register int i; |
| 277 |
|
| 278 |
if (maxcolors <= 2) { /* monochrome */ |
| 279 |
ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
| 280 |
if (ourdata == NULL) |
| 281 |
goto fail; |
| 282 |
ourras = make_raster(thedisplay, ourscreen, 1, ourdata, |
| 283 |
xmax, ymax, 8); |
| 284 |
if (ourras == NULL) |
| 285 |
goto fail; |
| 286 |
getmono(); |
| 287 |
} else if (XMatchVisualInfo(thedisplay,ourscreen,24,TrueColor,&vinfo)) { |
| 288 |
ourdata = (unsigned char *)malloc(xmax*ymax*3); |
| 289 |
if (ourdata == NULL) |
| 290 |
goto fail; |
| 291 |
ourras = make_raster(thedisplay, ourscreen, 24, ourdata, |
| 292 |
xmax, ymax, 8); |
| 293 |
if (ourras == NULL) |
| 294 |
goto fail; |
| 295 |
getfull(); |
| 296 |
} else { |
| 297 |
ourdata = (unsigned char *)malloc(xmax*ymax); |
| 298 |
if (ourdata == NULL) |
| 299 |
goto fail; |
| 300 |
ourras = make_raster(thedisplay, ourscreen, 8, ourdata, |
| 301 |
xmax, ymax, 8); |
| 302 |
if (ourras == NULL) |
| 303 |
goto fail; |
| 304 |
if (greyscale) |
| 305 |
biq(dither,maxcolors,1,ourmap); |
| 306 |
else |
| 307 |
ciq(dither,maxcolors,1,ourmap); |
| 308 |
for (i = 0; i < 256; i++) { |
| 309 |
rmap[i] = ourmap[0][i]; |
| 310 |
gmap[i] = ourmap[1][i]; |
| 311 |
bmap[i] = ourmap[2][i]; |
| 312 |
} |
| 313 |
if (init_rcolors(ourras, rmap, gmap, bmap) == 0) |
| 314 |
goto fail; |
| 315 |
} |
| 316 |
return; |
| 317 |
fail: |
| 318 |
quit("could not create raster image"); |
| 319 |
} |
| 320 |
|
| 321 |
|
| 322 |
getevent() /* process the next event */ |
| 323 |
{ |
| 324 |
union { |
| 325 |
XEvent u; |
| 326 |
XConfigureEvent c; |
| 327 |
XExposeEvent e; |
| 328 |
XButtonPressedEvent b; |
| 329 |
XKeyPressedEvent k; |
| 330 |
} e; |
| 331 |
|
| 332 |
XNextEvent(thedisplay, &e.u); |
| 333 |
switch (e.u.type) { |
| 334 |
case KeyPress: |
| 335 |
docom(&e.k); |
| 336 |
break; |
| 337 |
case ConfigureNotify: |
| 338 |
width = e.c.width; |
| 339 |
height = e.c.height; |
| 340 |
break; |
| 341 |
case MapNotify: |
| 342 |
map_rcolors(ourras, wind); |
| 343 |
if (fast) |
| 344 |
make_rpixmap(ourras); |
| 345 |
break; |
| 346 |
case UnmapNotify: |
| 347 |
unmap_rcolors(ourras); |
| 348 |
break; |
| 349 |
case Expose: |
| 350 |
redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
| 351 |
break; |
| 352 |
case ButtonPress: |
| 353 |
if (e.b.state & (ShiftMask|ControlMask)) |
| 354 |
moveimage(&e.b); |
| 355 |
else |
| 356 |
getbox(&e.b); |
| 357 |
break; |
| 358 |
} |
| 359 |
} |
| 360 |
|
| 361 |
|
| 362 |
redraw(x, y, w, h) /* redraw section of window */ |
| 363 |
int x, y; |
| 364 |
int w, h; |
| 365 |
{ |
| 366 |
patch_raster(wind,x-xoff,y-yoff,x,y,w,h,ourras); |
| 367 |
} |
| 368 |
|
| 369 |
|
| 370 |
docom(ekey) /* execute command */ |
| 371 |
XKeyPressedEvent *ekey; |
| 372 |
{ |
| 373 |
char buf[80]; |
| 374 |
COLOR cval; |
| 375 |
XColor cvx; |
| 376 |
int com, n; |
| 377 |
double comp; |
| 378 |
FVECT rorg, rdir; |
| 379 |
|
| 380 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 381 |
if (n == 0) |
| 382 |
return(0); |
| 383 |
com = buf[0]; |
| 384 |
switch (com) { /* interpret command */ |
| 385 |
case 'q': |
| 386 |
case CTRL(D): /* quit */ |
| 387 |
quit(0); |
| 388 |
case '\n': |
| 389 |
case '\r': |
| 390 |
case 'l': |
| 391 |
case 'c': /* value */ |
| 392 |
if (avgbox(cval) == -1) |
| 393 |
return(-1); |
| 394 |
switch (com) { |
| 395 |
case '\n': |
| 396 |
case '\r': /* radiance */ |
| 397 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
| 398 |
break; |
| 399 |
case 'l': /* luminance */ |
| 400 |
sprintf(buf, "%.0fn", bright(cval)*683.0/exposure); |
| 401 |
break; |
| 402 |
case 'c': /* color */ |
| 403 |
comp = pow(2.0, (double)scale); |
| 404 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 405 |
colval(cval,RED)*comp, |
| 406 |
colval(cval,GRN)*comp, |
| 407 |
colval(cval,BLU)*comp); |
| 408 |
break; |
| 409 |
} |
| 410 |
XDrawImageString(thedisplay, wind, ourgc, box.xmin, box.ymin, |
| 411 |
buf, strlen(buf)); |
| 412 |
return(0); |
| 413 |
case 'i': /* identify (contour) */ |
| 414 |
if (ourras->pixels == NULL) |
| 415 |
return(-1); |
| 416 |
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
| 417 |
n = ourras->pmap[n]; |
| 418 |
cvx.pixel = ourras->cdefs[n].pixel; |
| 419 |
cvx.red = random() & 65535; |
| 420 |
cvx.green = random() & 65535; |
| 421 |
cvx.blue = random() & 65535; |
| 422 |
XStoreColors(thedisplay, ourras->cmap, &cvx, 1); |
| 423 |
return(0); |
| 424 |
case 'p': /* position */ |
| 425 |
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
| 426 |
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
| 427 |
buf, strlen(buf)); |
| 428 |
return(0); |
| 429 |
case 't': /* trace */ |
| 430 |
if (!gotview) { |
| 431 |
XBell(thedisplay, 0); |
| 432 |
return(-1); |
| 433 |
} |
| 434 |
viewray(rorg, rdir, &ourview, |
| 435 |
(ekey->x-xoff+.5)/xmax, |
| 436 |
(ymax-1-ekey->y+yoff+.5)/ymax); |
| 437 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
| 438 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
| 439 |
fflush(stdout); |
| 440 |
return(0); |
| 441 |
case '=': /* adjust exposure */ |
| 442 |
if (avgbox(cval) == -1) |
| 443 |
return(-1); |
| 444 |
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
| 445 |
if (n == 0) |
| 446 |
return(0); |
| 447 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
| 448 |
scale += n; |
| 449 |
sprintf(buf, "%+d", scale); |
| 450 |
XDrawImageString(thedisplay, wind, ourgc, box.xmin, box.ymin, |
| 451 |
buf, strlen(buf)); |
| 452 |
XFlush(thedisplay); |
| 453 |
free(ourdata); |
| 454 |
free_raster(ourras); |
| 455 |
getras(); |
| 456 |
/* fall through */ |
| 457 |
case CTRL(R): /* redraw */ |
| 458 |
case CTRL(L): |
| 459 |
unmap_rcolors(ourras); |
| 460 |
XClearWindow(thedisplay, wind); |
| 461 |
map_rcolors(ourras, wind); |
| 462 |
if (fast) |
| 463 |
make_rpixmap(ourras); |
| 464 |
redraw(0, 0, width, height); |
| 465 |
return(0); |
| 466 |
case ' ': /* clear */ |
| 467 |
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
| 468 |
return(0); |
| 469 |
default: |
| 470 |
XBell(0); |
| 471 |
return(-1); |
| 472 |
} |
| 473 |
} |
| 474 |
|
| 475 |
|
| 476 |
moveimage(ep) /* shift the image */ |
| 477 |
XButtonPressedEvent *ep; |
| 478 |
{ |
| 479 |
XButtonPressedEvent eb; |
| 480 |
|
| 481 |
XMaskEvent(thedisplay, ButtonReleaseMask, &eb); |
| 482 |
xoff += eb.x - ep->x; |
| 483 |
yoff += eb.y - ep->y; |
| 484 |
XClearWindow(thedisplay, wind); |
| 485 |
redraw(0, 0, width, height); |
| 486 |
return(0); |
| 487 |
} |
| 488 |
|
| 489 |
|
| 490 |
getbox(ebut) /* get new box */ |
| 491 |
XButtonPressedEvent *ebut; |
| 492 |
{ |
| 493 |
union { |
| 494 |
XEvent e; |
| 495 |
XButtonReleasedEvent b; |
| 496 |
XPointerMovedEvent m; |
| 497 |
} e; |
| 498 |
|
| 499 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.e); |
| 500 |
while (e.e.type == ButtonMotionMask) { |
| 501 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
| 502 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, |
| 503 |
&e.e); |
| 504 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
| 505 |
} |
| 506 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
| 507 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
| 508 |
if (box.xmin > ebut->x) { |
| 509 |
box.xsiz = box.xmin - ebut->x + 1; |
| 510 |
box.xmin = ebut->x; |
| 511 |
} else { |
| 512 |
box.xsiz = ebut->x - box.xmin + 1; |
| 513 |
} |
| 514 |
if (box.ymin > ebut->y) { |
| 515 |
box.ysiz = box.ymin - ebut->y + 1; |
| 516 |
box.ymin = ebut->y; |
| 517 |
} else { |
| 518 |
box.ysiz = ebut->y - box.ymin + 1; |
| 519 |
} |
| 520 |
} |
| 521 |
|
| 522 |
|
| 523 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 524 |
int x0, y0, x1, y1; |
| 525 |
{ |
| 526 |
static GC mygc = 0; |
| 527 |
|
| 528 |
if (mygc == 0) { |
| 529 |
mygc = XCreateGC(thedisplay, wind, 0, 0); |
| 530 |
XSetPlaneMask(thedisplay, mygc, ~0L); |
| 531 |
XSetFunction(thedisplay, mygc, GXinvert); |
| 532 |
} |
| 533 |
XDrawLine(thedisplay, wind, mygc, x0, y0, x1, y0); |
| 534 |
XDrawLine(thedisplay, wind, mygc, x0, y1, x1, y1); |
| 535 |
XDrawLine(thedisplay, wind, mygc, x0, y0, x0, y1); |
| 536 |
XDrawLine(thedisplay, wind, mygc, x1, y0, x1, y1); |
| 537 |
} /* end of revbox */ |
| 538 |
|
| 539 |
|
| 540 |
avgbox(clr) /* average color over current box */ |
| 541 |
COLOR clr; |
| 542 |
{ |
| 543 |
int left, right, top, bottom; |
| 544 |
int y; |
| 545 |
double d; |
| 546 |
COLOR ctmp; |
| 547 |
register int x; |
| 548 |
|
| 549 |
setcolor(clr, 0.0, 0.0, 0.0); |
| 550 |
left = box.xmin - xoff; |
| 551 |
right = left + box.xsiz; |
| 552 |
if (left < 0) |
| 553 |
left = 0; |
| 554 |
if (right > xmax) |
| 555 |
right = xmax; |
| 556 |
if (left >= right) |
| 557 |
return(-1); |
| 558 |
top = box.ymin - yoff; |
| 559 |
bottom = top + box.ysiz; |
| 560 |
if (top < 0) |
| 561 |
top = 0; |
| 562 |
if (bottom > ymax) |
| 563 |
bottom = ymax; |
| 564 |
if (top >= bottom) |
| 565 |
return(-1); |
| 566 |
for (y = top; y < bottom; y++) { |
| 567 |
if (getscan(y) == -1) |
| 568 |
return(-1); |
| 569 |
for (x = left; x < right; x++) { |
| 570 |
colr_color(ctmp, scanline[x]); |
| 571 |
addcolor(clr, ctmp); |
| 572 |
} |
| 573 |
} |
| 574 |
d = 1.0/((right-left)*(bottom-top)); |
| 575 |
scalecolor(clr, d); |
| 576 |
return(0); |
| 577 |
} |
| 578 |
|
| 579 |
|
| 580 |
getmono() /* get monochrome data */ |
| 581 |
{ |
| 582 |
register unsigned char *dp; |
| 583 |
register int x, err; |
| 584 |
int y; |
| 585 |
rgbpixel *inline; |
| 586 |
short *cerr; |
| 587 |
|
| 588 |
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
| 589 |
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
| 590 |
quit("out of memory in getmono"); |
| 591 |
dp = ourdata - 1; |
| 592 |
for (y = 0; y < ymax; y++) { |
| 593 |
picreadline3(y, inline); |
| 594 |
err = 0; |
| 595 |
for (x = 0; x < xmax; x++) { |
| 596 |
if (!(x&7)) |
| 597 |
*++dp = 0; |
| 598 |
err += rgb_bright(&inline[x]) + cerr[x]; |
| 599 |
if (err > 127) |
| 600 |
err -= 255; |
| 601 |
else |
| 602 |
*dp |= 1<<(x&07); |
| 603 |
cerr[x] = err >>= 1; |
| 604 |
} |
| 605 |
} |
| 606 |
free((char *)inline); |
| 607 |
free((char *)cerr); |
| 608 |
} |
| 609 |
|
| 610 |
|
| 611 |
getfull() /* get full (24-bit) data */ |
| 612 |
{ |
| 613 |
int y; |
| 614 |
|
| 615 |
for (y = 0; y < ymax; y++) |
| 616 |
picreadline3(y, (rgbpixel *)(ourdata+y*xmax*3)); |
| 617 |
} |
| 618 |
|
| 619 |
|
| 620 |
scale_rcolors(xr, sf) /* scale color map */ |
| 621 |
register XRASTER *xr; |
| 622 |
double sf; |
| 623 |
{ |
| 624 |
register int i; |
| 625 |
long maxv; |
| 626 |
|
| 627 |
if (xr->pixels == NULL) |
| 628 |
return; |
| 629 |
|
| 630 |
sf = pow(sf, 1.0/gamcor); |
| 631 |
maxv = 65535/sf; |
| 632 |
|
| 633 |
for (i = xr->ncolors; i--; ) { |
| 634 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
| 635 |
65535 : |
| 636 |
xr->cdefs[i].red * sf; |
| 637 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
| 638 |
65535 : |
| 639 |
xr->cdefs[i].green * sf; |
| 640 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
| 641 |
65535 : |
| 642 |
xr->cdefs[i].blue * sf; |
| 643 |
} |
| 644 |
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
| 645 |
} |
| 646 |
|
| 647 |
|
| 648 |
getscan(y) |
| 649 |
int y; |
| 650 |
{ |
| 651 |
if (y != cury) { |
| 652 |
if (scanpos == NULL || scanpos[y] == -1) |
| 653 |
return(-1); |
| 654 |
if (fseek(fin, scanpos[y], 0) == -1) |
| 655 |
quit("fseek error"); |
| 656 |
cury = y; |
| 657 |
} else if (scanpos != NULL) |
| 658 |
scanpos[y] = ftell(fin); |
| 659 |
|
| 660 |
if (freadcolrs(scanline, xmax, fin) < 0) |
| 661 |
quiterr("read error"); |
| 662 |
|
| 663 |
cury++; |
| 664 |
return(0); |
| 665 |
} |
| 666 |
|
| 667 |
|
| 668 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
| 669 |
int y; |
| 670 |
register rgbpixel *l3; |
| 671 |
{ |
| 672 |
register int i; |
| 673 |
/* read scanline */ |
| 674 |
if (getscan(y) < 0) |
| 675 |
quiterr("cannot seek for picreadline"); |
| 676 |
/* convert scanline */ |
| 677 |
normcolrs(scanline, xmax, scale); |
| 678 |
for (i = 0; i < xmax; i++) { |
| 679 |
l3[i].r = scanline[i][RED]; |
| 680 |
l3[i].g = scanline[i][GRN]; |
| 681 |
l3[i].b = scanline[i][BLU]; |
| 682 |
} |
| 683 |
} |
| 684 |
|
| 685 |
|
| 686 |
picwriteline(y, l) /* add 8-bit scanline to image */ |
| 687 |
int y; |
| 688 |
pixel *l; |
| 689 |
{ |
| 690 |
bcopy((char *)l, (char *)ourdata+y*xmax, xmax); |
| 691 |
} |
| 692 |
|
| 693 |
|
| 694 |
picreadcm(map) /* do gamma correction */ |
| 695 |
colormap map; |
| 696 |
{ |
| 697 |
extern double pow(); |
| 698 |
register int i, val; |
| 699 |
|
| 700 |
for (i = 0; i < 256; i++) { |
| 701 |
val = pow(i/256.0, 1.0/gamcor) * 256.0; |
| 702 |
map[0][i] = map[1][i] = map[2][i] = val; |
| 703 |
} |
| 704 |
} |
| 705 |
|
| 706 |
|
| 707 |
picwritecm(map) /* handled elsewhere */ |
| 708 |
colormap map; |
| 709 |
{ |
| 710 |
#ifdef DEBUG |
| 711 |
register int i; |
| 712 |
|
| 713 |
for (i = 0; i < 256; i++) |
| 714 |
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
| 715 |
#endif |
| 716 |
} |
