| 1 |
/* Copyright (c) 1993 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 <signal.h> |
| 25 |
#include <X11/Xlib.h> |
| 26 |
#include <X11/cursorfont.h> |
| 27 |
#include <X11/Xutil.h> |
| 28 |
#include <X11/Xatom.h> |
| 29 |
|
| 30 |
#include "color.h" |
| 31 |
#include "view.h" |
| 32 |
#include "x11raster.h" |
| 33 |
#include "random.h" |
| 34 |
#include "resolu.h" |
| 35 |
|
| 36 |
#ifdef __alpha |
| 37 |
#define int4 int |
| 38 |
#endif |
| 39 |
#ifndef int4 |
| 40 |
#define int4 long |
| 41 |
#endif |
| 42 |
|
| 43 |
#define FONTNAME "8x13" /* text font we'll use */ |
| 44 |
|
| 45 |
#define CTRL(c) ((c)-'@') |
| 46 |
|
| 47 |
#define BORWIDTH 5 /* border width */ |
| 48 |
|
| 49 |
#define ICONSIZ (8*10) /* maximum icon dimension (even 8) */ |
| 50 |
|
| 51 |
#define ourscreen DefaultScreen(thedisplay) |
| 52 |
#define ourroot RootWindow(thedisplay,ourscreen) |
| 53 |
|
| 54 |
#define revline(x0,y0,x1,y1) XDrawLine(thedisplay,wind,revgc,x0,y0,x1,y1) |
| 55 |
|
| 56 |
#define redraw(x,y,w,h) patch_raster(wind,(x)-xoff,(y)-yoff,x,y,w,h,ourras) |
| 57 |
|
| 58 |
double gamcor = 2.2; /* gamma correction */ |
| 59 |
char *gamstr = NULL; /* gamma value override */ |
| 60 |
|
| 61 |
int dither = 1; /* dither colors? */ |
| 62 |
int fast = 0; /* keep picture in Pixmap? */ |
| 63 |
|
| 64 |
char *dispname = NULL; /* our display name */ |
| 65 |
|
| 66 |
Window wind = 0; /* our output window */ |
| 67 |
unsigned long ourblack=0, ourwhite=1; /* black and white for this visual */ |
| 68 |
int maxcolors = 0; /* maximum colors */ |
| 69 |
int greyscale = 0; /* in grey */ |
| 70 |
|
| 71 |
int scale = 0; /* scalefactor; power of two */ |
| 72 |
|
| 73 |
int xoff = 0; /* x image offset */ |
| 74 |
int yoff = 0; /* y image offset */ |
| 75 |
|
| 76 |
int parent = 0; /* number of children, -1 if child */ |
| 77 |
|
| 78 |
VIEW ourview = STDVIEW; /* image view parameters */ |
| 79 |
int gotview = 0; /* got parameters from file */ |
| 80 |
|
| 81 |
COLR *scanline; /* scan line buffer */ |
| 82 |
|
| 83 |
RESOLU inpres; /* input resolution and ordering */ |
| 84 |
int xmax, ymax; /* picture dimensions */ |
| 85 |
int width, height; /* window size */ |
| 86 |
char *fname = NULL; /* input file name */ |
| 87 |
FILE *fin = stdin; /* input file */ |
| 88 |
long *scanpos = NULL; /* scan line positions in file */ |
| 89 |
int cury = 0; /* current scan location */ |
| 90 |
|
| 91 |
double exposure = 1.0; /* exposure compensation used */ |
| 92 |
|
| 93 |
int wrongformat = 0; /* input in another format? */ |
| 94 |
|
| 95 |
GC ourgc; /* standard graphics context */ |
| 96 |
GC revgc; /* graphics context with GXinvert */ |
| 97 |
|
| 98 |
int *ourrank; /* our visual class ranking */ |
| 99 |
XVisualInfo ourvis; /* our visual */ |
| 100 |
XRASTER *ourras; /* our stored image */ |
| 101 |
unsigned char *ourdata; /* our image data */ |
| 102 |
|
| 103 |
struct { |
| 104 |
int xmin, ymin, xsiz, ysiz; |
| 105 |
} box = {0, 0, 0, 0}; /* current box */ |
| 106 |
|
| 107 |
char *geometry = NULL; /* geometry specification */ |
| 108 |
|
| 109 |
char icondata[ICONSIZ*ICONSIZ/8]; /* icon bitmap data */ |
| 110 |
int iconwidth = 0, iconheight = 0; |
| 111 |
|
| 112 |
char *progname; |
| 113 |
|
| 114 |
char errmsg[128]; |
| 115 |
|
| 116 |
BYTE clrtab[256][3]; /* global color map */ |
| 117 |
|
| 118 |
extern long ftell(); |
| 119 |
|
| 120 |
extern char *getenv(); |
| 121 |
|
| 122 |
Display *thedisplay; |
| 123 |
Atom closedownAtom, wmProtocolsAtom; |
| 124 |
|
| 125 |
int sigrecv; |
| 126 |
|
| 127 |
int onsig() { sigrecv++; } |
| 128 |
|
| 129 |
|
| 130 |
main(argc, argv) |
| 131 |
int argc; |
| 132 |
char *argv[]; |
| 133 |
{ |
| 134 |
int headline(); |
| 135 |
int i; |
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int pid; |
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|
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progname = argv[0]; |
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|
| 140 |
for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
| 143 |
case 'c': |
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maxcolors = atoi(argv[++i]); |
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break; |
| 146 |
case 'b': |
| 147 |
greyscale = !greyscale; |
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break; |
| 149 |
case 'm': |
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maxcolors = 2; |
| 151 |
break; |
| 152 |
case 'd': |
| 153 |
if (argv[i][2] == 'i') |
| 154 |
dispname = argv[++i]; |
| 155 |
else |
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dither = !dither; |
| 157 |
break; |
| 158 |
case 'f': |
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fast = !fast; |
| 160 |
break; |
| 161 |
case 'e': |
| 162 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 163 |
goto userr; |
| 164 |
scale = atoi(argv[++i]); |
| 165 |
break; |
| 166 |
case 'g': |
| 167 |
if (argv[i][2] == 'e') |
| 168 |
geometry = argv[++i]; |
| 169 |
else |
| 170 |
gamstr = argv[++i]; |
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break; |
| 172 |
default: |
| 173 |
goto userr; |
| 174 |
} |
| 175 |
else if (argv[i][0] == '=') |
| 176 |
geometry = argv[i]; |
| 177 |
else |
| 178 |
break; |
| 179 |
|
| 180 |
if (i > argc) |
| 181 |
goto userr; |
| 182 |
while (i < argc-1) { |
| 183 |
sigrecv = 0; |
| 184 |
signal(SIGCONT, onsig); |
| 185 |
if ((pid=fork()) == 0) { /* a child for each picture */ |
| 186 |
parent = -1; |
| 187 |
break; |
| 188 |
} |
| 189 |
if (pid < 0) |
| 190 |
quiterr("fork failed"); |
| 191 |
parent++; |
| 192 |
while (!sigrecv) |
| 193 |
pause(); /* wait for wake-up call */ |
| 194 |
i++; |
| 195 |
} |
| 196 |
if (i < argc) { /* open picture file */ |
| 197 |
fname = argv[i]; |
| 198 |
fin = fopen(fname, "r"); |
| 199 |
if (fin == NULL) |
| 200 |
quiterr("cannot open picture file"); |
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} |
| 202 |
/* get header */ |
| 203 |
getheader(fin, headline, NULL); |
| 204 |
/* get picture dimensions */ |
| 205 |
if (wrongformat || !fgetsresolu(&inpres, fin)) |
| 206 |
quiterr("bad picture format"); |
| 207 |
xmax = scanlen(&inpres); |
| 208 |
ymax = numscans(&inpres); |
| 209 |
/* set view parameters */ |
| 210 |
if (gotview && setview(&ourview) != NULL) |
| 211 |
gotview = 0; |
| 212 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
| 213 |
quiterr("out of memory"); |
| 214 |
|
| 215 |
init(argc, argv); /* get file and open window */ |
| 216 |
|
| 217 |
for ( ; ; ) |
| 218 |
getevent(); /* main loop */ |
| 219 |
userr: |
| 220 |
fprintf(stderr, |
| 221 |
"Usage: %s [-di disp][[-ge] spec][-b][-m][-d][-f][-c nclrs][-e +/-stops][-g gamcor] pic ..\n", |
| 222 |
progname); |
| 223 |
exit(1); |
| 224 |
} |
| 225 |
|
| 226 |
|
| 227 |
headline(s) /* get relevant info from header */ |
| 228 |
char *s; |
| 229 |
{ |
| 230 |
char fmt[32]; |
| 231 |
|
| 232 |
if (isexpos(s)) |
| 233 |
exposure *= exposval(s); |
| 234 |
else if (isformat(s)) { |
| 235 |
formatval(fmt, s); |
| 236 |
wrongformat = strcmp(fmt, COLRFMT); |
| 237 |
} else if (isview(s) && sscanview(&ourview, s) > 0) |
| 238 |
gotview++; |
| 239 |
} |
| 240 |
|
| 241 |
|
| 242 |
init(argc, argv) /* get data and open window */ |
| 243 |
int argc; |
| 244 |
char **argv; |
| 245 |
{ |
| 246 |
XSetWindowAttributes ourwinattr; |
| 247 |
XClassHint xclshints; |
| 248 |
XWMHints xwmhints; |
| 249 |
XSizeHints xszhints; |
| 250 |
XTextProperty windowName, iconName; |
| 251 |
XGCValues xgcv; |
| 252 |
char *name; |
| 253 |
register int i; |
| 254 |
|
| 255 |
if (fname != NULL) { |
| 256 |
scanpos = (long *)malloc(ymax*sizeof(long)); |
| 257 |
if (scanpos == NULL) |
| 258 |
quiterr("out of memory"); |
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for (i = 0; i < ymax; i++) |
| 260 |
scanpos[i] = -1; |
| 261 |
name = fname; |
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} else |
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name = progname; |
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/* remove directory prefix from name */ |
| 265 |
for (i = strlen(name); i-- > 0; ) |
| 266 |
if (name[i] == '/') |
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break; |
| 268 |
name += i+1; |
| 269 |
if ((thedisplay = XOpenDisplay(dispname)) == NULL) |
| 270 |
quiterr("cannot open display"); |
| 271 |
/* set gamma value */ |
| 272 |
if (gamstr == NULL) /* get it from the X server */ |
| 273 |
gamstr = XGetDefault(thedisplay, "radiance", "gamma"); |
| 274 |
if (gamstr == NULL) /* get it from the environment */ |
| 275 |
gamstr = getenv("DISPLAY_GAMMA"); |
| 276 |
if (gamstr != NULL) |
| 277 |
gamcor = atof(gamstr); |
| 278 |
/* get best visual for default screen */ |
| 279 |
getbestvis(); |
| 280 |
/* store image */ |
| 281 |
getras(); |
| 282 |
/* get size and position */ |
| 283 |
xszhints.flags = 0; |
| 284 |
xszhints.width = xmax; xszhints.height = ymax; |
| 285 |
if (geometry != NULL) { |
| 286 |
i = XParseGeometry(geometry, &xszhints.x, &xszhints.y, |
| 287 |
(unsigned *)&xszhints.width, |
| 288 |
(unsigned *)&xszhints.height); |
| 289 |
if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue)) |
| 290 |
xszhints.flags |= USSize; |
| 291 |
else |
| 292 |
xszhints.flags |= PSize; |
| 293 |
if ((i&(XValue|YValue)) == (XValue|YValue)) { |
| 294 |
xszhints.flags |= USPosition; |
| 295 |
if (i & XNegative) |
| 296 |
xszhints.x += DisplayWidth(thedisplay, |
| 297 |
ourscreen)-1-xszhints.width-2*BORWIDTH; |
| 298 |
if (i & YNegative) |
| 299 |
xszhints.y += DisplayHeight(thedisplay, |
| 300 |
ourscreen)-1-xszhints.height-2*BORWIDTH; |
| 301 |
} |
| 302 |
} |
| 303 |
/* open window */ |
| 304 |
ourwinattr.border_pixel = ourwhite; |
| 305 |
ourwinattr.background_pixel = ourblack; |
| 306 |
ourwinattr.colormap = XCreateColormap(thedisplay, ourroot, |
| 307 |
ourvis.visual, AllocNone); |
| 308 |
ourwinattr.event_mask = ExposureMask|KeyPressMask|ButtonPressMask| |
| 309 |
ButtonReleaseMask|ButtonMotionMask|StructureNotifyMask; |
| 310 |
ourwinattr.cursor = XCreateFontCursor(thedisplay, XC_diamond_cross); |
| 311 |
wind = XCreateWindow(thedisplay, ourroot, xszhints.x, xszhints.y, |
| 312 |
xszhints.width, xszhints.height, BORWIDTH, |
| 313 |
ourvis.depth, InputOutput, ourvis.visual, CWEventMask| |
| 314 |
CWCursor|CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr); |
| 315 |
if (wind == 0) |
| 316 |
quiterr("cannot create window"); |
| 317 |
width = xmax; |
| 318 |
height = ymax; |
| 319 |
/* prepare graphics drawing context */ |
| 320 |
if ((xgcv.font = XLoadFont(thedisplay, FONTNAME)) == 0) |
| 321 |
quiterr("cannot get font"); |
| 322 |
xgcv.foreground = ourblack; |
| 323 |
xgcv.background = ourwhite; |
| 324 |
ourgc = XCreateGC(thedisplay, wind, GCForeground|GCBackground| |
| 325 |
GCFont, &xgcv); |
| 326 |
xgcv.function = GXinvert; |
| 327 |
revgc = XCreateGC(thedisplay, wind, GCForeground|GCBackground| |
| 328 |
GCFunction, &xgcv); |
| 329 |
|
| 330 |
/* set up the window manager */ |
| 331 |
xwmhints.flags = InputHint|IconPixmapHint; |
| 332 |
xwmhints.input = True; |
| 333 |
xwmhints.icon_pixmap = XCreateBitmapFromData(thedisplay, |
| 334 |
wind, icondata, iconwidth, iconheight); |
| 335 |
|
| 336 |
windowName.encoding = iconName.encoding = XA_STRING; |
| 337 |
windowName.format = iconName.format = 8; |
| 338 |
windowName.value = (u_char *)name; |
| 339 |
windowName.nitems = strlen(windowName.value); |
| 340 |
iconName.value = (u_char *)name; |
| 341 |
iconName.nitems = strlen(windowName.value); |
| 342 |
|
| 343 |
xclshints.res_name = NULL; |
| 344 |
xclshints.res_class = "Ximage"; |
| 345 |
XSetWMProperties(thedisplay, wind, &windowName, &iconName, |
| 346 |
argv, argc, &xszhints, &xwmhints, &xclshints); |
| 347 |
closedownAtom = XInternAtom(thedisplay, "WM_DELETE_WINDOW", False); |
| 348 |
wmProtocolsAtom = XInternAtom(thedisplay, "WM_PROTOCOLS", False); |
| 349 |
XSetWMProtocols(thedisplay, wind, &closedownAtom, 1); |
| 350 |
|
| 351 |
XMapWindow(thedisplay, wind); |
| 352 |
} /* end of init */ |
| 353 |
|
| 354 |
|
| 355 |
quiterr(err) /* print message and exit */ |
| 356 |
char *err; |
| 357 |
{ |
| 358 |
register int es; |
| 359 |
int cs; |
| 360 |
|
| 361 |
if (es = err != NULL) |
| 362 |
fprintf(stderr, "%s: %s: %s\n", progname, |
| 363 |
fname==NULL?"<stdin>":fname, err); |
| 364 |
if (thedisplay != NULL) |
| 365 |
XCloseDisplay(thedisplay); |
| 366 |
if (parent < 0 & sigrecv == 0) |
| 367 |
kill(getppid(), SIGCONT); |
| 368 |
while (parent > 0 && wait(&cs) != -1) { /* wait for any children */ |
| 369 |
if (es == 0) |
| 370 |
es = cs>>8 & 0xff; |
| 371 |
parent--; |
| 372 |
} |
| 373 |
exit(es); |
| 374 |
} |
| 375 |
|
| 376 |
|
| 377 |
static int |
| 378 |
viscmp(v1,v2) /* compare visual to see which is better, descending */ |
| 379 |
register XVisualInfo *v1, *v2; |
| 380 |
{ |
| 381 |
int bad1 = 0, bad2 = 0; |
| 382 |
register int *rp; |
| 383 |
|
| 384 |
if (v1->class == v2->class) { |
| 385 |
if (v1->class == TrueColor || v1->class == DirectColor) { |
| 386 |
/* prefer 24-bit to 32-bit */ |
| 387 |
if (v1->depth == 24 && v2->depth == 32) |
| 388 |
return(-1); |
| 389 |
if (v1->depth == 32 && v2->depth == 24) |
| 390 |
return(1); |
| 391 |
return(0); |
| 392 |
} |
| 393 |
/* don't be too greedy */ |
| 394 |
if (maxcolors <= 1<<v1->depth && maxcolors <= 1<<v2->depth) |
| 395 |
return(v1->depth - v2->depth); |
| 396 |
return(v2->depth - v1->depth); |
| 397 |
} |
| 398 |
/* prefer Pseudo when < 24-bit */ |
| 399 |
if ((v1->class == TrueColor || v1->class == DirectColor) && |
| 400 |
v1->depth < 24) |
| 401 |
bad1 = 1; |
| 402 |
if ((v2->class == TrueColor || v2->class == DirectColor) && |
| 403 |
v2->depth < 24) |
| 404 |
bad2 = -1; |
| 405 |
if (bad1 | bad2) |
| 406 |
return(bad1+bad2); |
| 407 |
/* otherwise, use class ranking */ |
| 408 |
for (rp = ourrank; *rp != -1; rp++) { |
| 409 |
if (v1->class == *rp) |
| 410 |
return(-1); |
| 411 |
if (v2->class == *rp) |
| 412 |
return(1); |
| 413 |
} |
| 414 |
return(0); |
| 415 |
} |
| 416 |
|
| 417 |
|
| 418 |
getbestvis() /* get the best visual for this screen */ |
| 419 |
{ |
| 420 |
#ifdef DEBUG |
| 421 |
static char vistype[][12] = { |
| 422 |
"StaticGray", |
| 423 |
"GrayScale", |
| 424 |
"StaticColor", |
| 425 |
"PseudoColor", |
| 426 |
"TrueColor", |
| 427 |
"DirectColor" |
| 428 |
}; |
| 429 |
#endif |
| 430 |
static int rankings[3][6] = { |
| 431 |
{TrueColor,DirectColor,PseudoColor,GrayScale,StaticGray,-1}, |
| 432 |
{PseudoColor,GrayScale,StaticGray,-1}, |
| 433 |
{PseudoColor,GrayScale,StaticGray,-1} |
| 434 |
}; |
| 435 |
XVisualInfo *xvi; |
| 436 |
int vismatched; |
| 437 |
register int i, j; |
| 438 |
|
| 439 |
if (greyscale) { |
| 440 |
ourrank = rankings[2]; |
| 441 |
if (maxcolors < 2) maxcolors = 256; |
| 442 |
} else if (maxcolors >= 2 && maxcolors <= 256) |
| 443 |
ourrank = rankings[1]; |
| 444 |
else { |
| 445 |
ourrank = rankings[0]; |
| 446 |
maxcolors = 256; |
| 447 |
} |
| 448 |
/* find best visual */ |
| 449 |
ourvis.screen = ourscreen; |
| 450 |
xvi = XGetVisualInfo(thedisplay,VisualScreenMask,&ourvis,&vismatched); |
| 451 |
if (xvi == NULL) |
| 452 |
quiterr("no visuals for this screen!"); |
| 453 |
#ifdef DEBUG |
| 454 |
fprintf(stderr, "Supported visuals:\n"); |
| 455 |
for (i = 0; i < vismatched; i++) |
| 456 |
fprintf(stderr, "\ttype %s, depth %d\n", |
| 457 |
vistype[xvi[i].class], xvi[i].depth); |
| 458 |
#endif |
| 459 |
for (i = 0, j = 1; j < vismatched; j++) |
| 460 |
if (viscmp(&xvi[i],&xvi[j]) > 0) |
| 461 |
i = j; |
| 462 |
/* compare to least acceptable */ |
| 463 |
for (j = 0; ourrank[j++] != -1; ) |
| 464 |
; |
| 465 |
ourvis.class = ourrank[--j]; |
| 466 |
ourvis.depth = 1; |
| 467 |
if (viscmp(&xvi[i],&ourvis) > 0) |
| 468 |
quiterr("inadequate visuals on this screen"); |
| 469 |
/* OK, we'll use it */ |
| 470 |
copystruct(&ourvis, &xvi[i]); |
| 471 |
#ifdef DEBUG |
| 472 |
fprintf(stderr, "Selected visual type %s, depth %d\n", |
| 473 |
vistype[ourvis.class], ourvis.depth); |
| 474 |
#endif |
| 475 |
/* make appropriate adjustments */ |
| 476 |
if (ourvis.class == GrayScale || ourvis.class == StaticGray) |
| 477 |
greyscale = 1; |
| 478 |
if (ourvis.depth <= 8 && ourvis.colormap_size < maxcolors) |
| 479 |
maxcolors = ourvis.colormap_size; |
| 480 |
if (ourvis.class == StaticGray) { |
| 481 |
ourblack = 0; |
| 482 |
ourwhite = 255; |
| 483 |
} else if (ourvis.class == PseudoColor) { |
| 484 |
ourblack = BlackPixel(thedisplay,ourscreen); |
| 485 |
ourwhite = WhitePixel(thedisplay,ourscreen); |
| 486 |
if ((ourblack|ourwhite) & ~255L) { |
| 487 |
ourblack = 0; |
| 488 |
ourwhite = 1; |
| 489 |
} |
| 490 |
if (maxcolors > 4) |
| 491 |
maxcolors -= 2; |
| 492 |
} else { |
| 493 |
ourblack = 0; |
| 494 |
ourwhite = ourvis.red_mask|ourvis.green_mask|ourvis.blue_mask; |
| 495 |
} |
| 496 |
XFree((char *)xvi); |
| 497 |
} |
| 498 |
|
| 499 |
|
| 500 |
getras() /* get raster file */ |
| 501 |
{ |
| 502 |
XVisualInfo vinfo; |
| 503 |
|
| 504 |
if (maxcolors <= 2) { /* monochrome */ |
| 505 |
ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
| 506 |
if (ourdata == NULL) |
| 507 |
goto fail; |
| 508 |
ourras = make_raster(thedisplay, &ourvis, 1, ourdata, |
| 509 |
xmax, ymax, 8); |
| 510 |
if (ourras == NULL) |
| 511 |
goto fail; |
| 512 |
getmono(); |
| 513 |
} else if (ourvis.class == TrueColor | ourvis.class == DirectColor) { |
| 514 |
ourdata = (unsigned char *)malloc(sizeof(int4)*xmax*ymax); |
| 515 |
if (ourdata == NULL) |
| 516 |
goto fail; |
| 517 |
ourras = make_raster(thedisplay, &ourvis, sizeof(int4)*8, |
| 518 |
ourdata, xmax, ymax, 32); |
| 519 |
if (ourras == NULL) |
| 520 |
goto fail; |
| 521 |
getfull(); |
| 522 |
} else { |
| 523 |
ourdata = (unsigned char *)malloc(xmax*ymax); |
| 524 |
if (ourdata == NULL) |
| 525 |
goto fail; |
| 526 |
ourras = make_raster(thedisplay, &ourvis, 8, ourdata, |
| 527 |
xmax, ymax, 8); |
| 528 |
if (ourras == NULL) |
| 529 |
goto fail; |
| 530 |
if (greyscale | ourvis.class == StaticGray) |
| 531 |
getgrey(); |
| 532 |
else |
| 533 |
getmapped(); |
| 534 |
if (ourvis.class != StaticGray && !init_rcolors(ourras,clrtab)) |
| 535 |
goto fail; |
| 536 |
} |
| 537 |
return; |
| 538 |
fail: |
| 539 |
quiterr("could not create raster image"); |
| 540 |
} |
| 541 |
|
| 542 |
|
| 543 |
getevent() /* process the next event */ |
| 544 |
{ |
| 545 |
XEvent xev; |
| 546 |
|
| 547 |
XNextEvent(thedisplay, &xev); |
| 548 |
switch ((int)xev.type) { |
| 549 |
case KeyPress: |
| 550 |
docom(&xev.xkey); |
| 551 |
break; |
| 552 |
case ConfigureNotify: |
| 553 |
width = xev.xconfigure.width; |
| 554 |
height = xev.xconfigure.height; |
| 555 |
break; |
| 556 |
case MapNotify: |
| 557 |
map_rcolors(ourras, wind); |
| 558 |
if (fast) |
| 559 |
make_rpixmap(ourras, wind); |
| 560 |
if (parent < 0 & sigrecv == 0) { /* notify parent */ |
| 561 |
kill(getppid(), SIGCONT); |
| 562 |
sigrecv--; |
| 563 |
} |
| 564 |
break; |
| 565 |
case UnmapNotify: |
| 566 |
if (!fast) |
| 567 |
unmap_rcolors(ourras); |
| 568 |
break; |
| 569 |
case Expose: |
| 570 |
redraw(xev.xexpose.x, xev.xexpose.y, |
| 571 |
xev.xexpose.width, xev.xexpose.height); |
| 572 |
break; |
| 573 |
case ButtonPress: |
| 574 |
if (xev.xbutton.state & (ShiftMask|ControlMask)) |
| 575 |
moveimage(&xev.xbutton); |
| 576 |
else if (xev.xbutton.button == Button2) |
| 577 |
traceray(xev.xbutton.x, xev.xbutton.y); |
| 578 |
else |
| 579 |
getbox(&xev.xbutton); |
| 580 |
break; |
| 581 |
case ClientMessage: |
| 582 |
if ((xev.xclient.message_type == wmProtocolsAtom) && |
| 583 |
(xev.xclient.data.l[0] == closedownAtom)) |
| 584 |
quiterr(NULL); |
| 585 |
break; |
| 586 |
} |
| 587 |
} |
| 588 |
|
| 589 |
|
| 590 |
traceray(xpos, ypos) /* print ray corresponding to pixel */ |
| 591 |
int xpos, ypos; |
| 592 |
{ |
| 593 |
FLOAT hv[2]; |
| 594 |
FVECT rorg, rdir; |
| 595 |
|
| 596 |
if (!gotview) { /* no view, no can do */ |
| 597 |
XBell(thedisplay, 0); |
| 598 |
return(-1); |
| 599 |
} |
| 600 |
pix2loc(hv, &inpres, xpos-xoff, ypos-yoff); |
| 601 |
if (viewray(rorg, rdir, &ourview, hv[0], hv[1]) < 0) |
| 602 |
return(-1); |
| 603 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
| 604 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
| 605 |
fflush(stdout); |
| 606 |
return(0); |
| 607 |
} |
| 608 |
|
| 609 |
|
| 610 |
docom(ekey) /* execute command */ |
| 611 |
XKeyPressedEvent *ekey; |
| 612 |
{ |
| 613 |
char buf[80]; |
| 614 |
COLOR cval; |
| 615 |
XColor cvx; |
| 616 |
int com, n; |
| 617 |
double comp; |
| 618 |
FLOAT hv[2]; |
| 619 |
|
| 620 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 621 |
if (n == 0) |
| 622 |
return(0); |
| 623 |
com = buf[0]; |
| 624 |
switch (com) { /* interpret command */ |
| 625 |
case 'q': |
| 626 |
case 'Q': |
| 627 |
case CTRL('D'): /* quit */ |
| 628 |
quiterr(NULL); |
| 629 |
case '\n': |
| 630 |
case '\r': |
| 631 |
case 'l': |
| 632 |
case 'c': /* value */ |
| 633 |
if (avgbox(cval) == -1) |
| 634 |
return(-1); |
| 635 |
switch (com) { |
| 636 |
case '\n': |
| 637 |
case '\r': /* radiance */ |
| 638 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
| 639 |
break; |
| 640 |
case 'l': /* luminance */ |
| 641 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
| 642 |
break; |
| 643 |
case 'c': /* color */ |
| 644 |
comp = pow(2.0, (double)scale); |
| 645 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 646 |
colval(cval,RED)*comp, |
| 647 |
colval(cval,GRN)*comp, |
| 648 |
colval(cval,BLU)*comp); |
| 649 |
break; |
| 650 |
} |
| 651 |
XDrawImageString(thedisplay, wind, ourgc, |
| 652 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
| 653 |
return(0); |
| 654 |
case 'i': /* identify (contour) */ |
| 655 |
if (ourras->pixels == NULL) |
| 656 |
return(-1); |
| 657 |
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
| 658 |
n = ourras->pmap[n]; |
| 659 |
cvx.pixel = ourras->cdefs[n].pixel; |
| 660 |
cvx.red = random() & 65535; |
| 661 |
cvx.green = random() & 65535; |
| 662 |
cvx.blue = random() & 65535; |
| 663 |
cvx.flags = DoRed|DoGreen|DoBlue; |
| 664 |
XStoreColor(thedisplay, ourras->cmap, &cvx); |
| 665 |
return(0); |
| 666 |
case 'p': /* position */ |
| 667 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
| 668 |
sprintf(buf, "(%d,%d)", (int)(hv[0]*inpres.xr), |
| 669 |
(int)(hv[1]*inpres.yr)); |
| 670 |
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
| 671 |
buf, strlen(buf)); |
| 672 |
return(0); |
| 673 |
case 't': /* trace */ |
| 674 |
return(traceray(ekey->x, ekey->y)); |
| 675 |
case '=': /* adjust exposure */ |
| 676 |
case '@': /* adaptation level */ |
| 677 |
if (avgbox(cval) == -1) |
| 678 |
return(-1); |
| 679 |
comp = bright(cval); |
| 680 |
if (comp < 1e-20) { |
| 681 |
XBell(thedisplay, 0); |
| 682 |
return(-1); |
| 683 |
} |
| 684 |
if (com == '@') |
| 685 |
comp = 106./exposure/ |
| 686 |
pow(1.219+pow(comp*WHTEFFICACY/exposure,.4),2.5); |
| 687 |
else |
| 688 |
comp = .5/comp; |
| 689 |
comp = log(comp)/.69315 - scale; |
| 690 |
n = comp < 0 ? comp-.5 : comp+.5 ; /* round */ |
| 691 |
if (n == 0) |
| 692 |
return(0); |
| 693 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
| 694 |
scale += n; |
| 695 |
sprintf(buf, "%+d", scale); |
| 696 |
XDrawImageString(thedisplay, wind, ourgc, |
| 697 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
| 698 |
XFlush(thedisplay); |
| 699 |
free(ourdata); |
| 700 |
free_raster(ourras); |
| 701 |
getras(); |
| 702 |
/* fall through */ |
| 703 |
case CTRL('R'): /* redraw */ |
| 704 |
case CTRL('L'): |
| 705 |
unmap_rcolors(ourras); |
| 706 |
XClearWindow(thedisplay, wind); |
| 707 |
map_rcolors(ourras, wind); |
| 708 |
if (fast) |
| 709 |
make_rpixmap(ourras, wind); |
| 710 |
redraw(0, 0, width, height); |
| 711 |
return(0); |
| 712 |
case 'f': /* turn on fast redraw */ |
| 713 |
fast = 1; |
| 714 |
make_rpixmap(ourras, wind); |
| 715 |
return(0); |
| 716 |
case 'F': /* turn off fast redraw */ |
| 717 |
fast = 0; |
| 718 |
free_rpixmap(ourras); |
| 719 |
return(0); |
| 720 |
case '0': /* recenter origin */ |
| 721 |
if (xoff == 0 & yoff == 0) |
| 722 |
return(0); |
| 723 |
xoff = yoff = 0; |
| 724 |
XClearWindow(thedisplay, wind); |
| 725 |
redraw(0, 0, width, height); |
| 726 |
return(0); |
| 727 |
case ' ': /* clear */ |
| 728 |
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
| 729 |
return(0); |
| 730 |
default: |
| 731 |
XBell(thedisplay, 0); |
| 732 |
return(-1); |
| 733 |
} |
| 734 |
} |
| 735 |
|
| 736 |
|
| 737 |
moveimage(ebut) /* shift the image */ |
| 738 |
XButtonPressedEvent *ebut; |
| 739 |
{ |
| 740 |
XEvent e; |
| 741 |
int mxo, myo; |
| 742 |
|
| 743 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e); |
| 744 |
while (e.type == MotionNotify) { |
| 745 |
mxo = e.xmotion.x; |
| 746 |
myo = e.xmotion.y; |
| 747 |
revline(ebut->x, ebut->y, mxo, myo); |
| 748 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
| 749 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
| 750 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e); |
| 751 |
revline(ebut->x, ebut->y, mxo, myo); |
| 752 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
| 753 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
| 754 |
} |
| 755 |
xoff += e.xbutton.x - ebut->x; |
| 756 |
yoff += e.xbutton.y - ebut->y; |
| 757 |
XClearWindow(thedisplay, wind); |
| 758 |
redraw(0, 0, width, height); |
| 759 |
} |
| 760 |
|
| 761 |
|
| 762 |
getbox(ebut) /* get new box */ |
| 763 |
XButtonPressedEvent *ebut; |
| 764 |
{ |
| 765 |
XEvent e; |
| 766 |
|
| 767 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e); |
| 768 |
while (e.type == MotionNotify) { |
| 769 |
revbox(ebut->x, ebut->y, box.xmin = e.xmotion.x, box.ymin = e.xmotion.y); |
| 770 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e); |
| 771 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
| 772 |
} |
| 773 |
box.xmin = e.xbutton.x<0 ? 0 : (e.xbutton.x>=width ? width-1 : e.xbutton.x); |
| 774 |
box.ymin = e.xbutton.y<0 ? 0 : (e.xbutton.y>=height ? height-1 : e.xbutton.y); |
| 775 |
if (box.xmin > ebut->x) { |
| 776 |
box.xsiz = box.xmin - ebut->x + 1; |
| 777 |
box.xmin = ebut->x; |
| 778 |
} else { |
| 779 |
box.xsiz = ebut->x - box.xmin + 1; |
| 780 |
} |
| 781 |
if (box.ymin > ebut->y) { |
| 782 |
box.ysiz = box.ymin - ebut->y + 1; |
| 783 |
box.ymin = ebut->y; |
| 784 |
} else { |
| 785 |
box.ysiz = ebut->y - box.ymin + 1; |
| 786 |
} |
| 787 |
} |
| 788 |
|
| 789 |
|
| 790 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 791 |
int x0, y0, x1, y1; |
| 792 |
{ |
| 793 |
revline(x0, y0, x1, y0); |
| 794 |
revline(x0, y1, x1, y1); |
| 795 |
revline(x0, y0, x0, y1); |
| 796 |
revline(x1, y0, x1, y1); |
| 797 |
} |
| 798 |
|
| 799 |
|
| 800 |
avgbox(clr) /* average color over current box */ |
| 801 |
COLOR clr; |
| 802 |
{ |
| 803 |
static COLOR lc; |
| 804 |
static int ll, lr, lt, lb; |
| 805 |
int left, right, top, bottom; |
| 806 |
int y; |
| 807 |
double d; |
| 808 |
COLOR ctmp; |
| 809 |
register int x; |
| 810 |
|
| 811 |
setcolor(clr, 0.0, 0.0, 0.0); |
| 812 |
left = box.xmin - xoff; |
| 813 |
right = left + box.xsiz; |
| 814 |
if (left < 0) |
| 815 |
left = 0; |
| 816 |
if (right > xmax) |
| 817 |
right = xmax; |
| 818 |
if (left >= right) |
| 819 |
return(-1); |
| 820 |
top = box.ymin - yoff; |
| 821 |
bottom = top + box.ysiz; |
| 822 |
if (top < 0) |
| 823 |
top = 0; |
| 824 |
if (bottom > ymax) |
| 825 |
bottom = ymax; |
| 826 |
if (top >= bottom) |
| 827 |
return(-1); |
| 828 |
if (left == ll && right == lr && top == lt && bottom == lb) { |
| 829 |
copycolor(clr, lc); |
| 830 |
return(0); |
| 831 |
} |
| 832 |
for (y = top; y < bottom; y++) { |
| 833 |
if (getscan(y) == -1) |
| 834 |
return(-1); |
| 835 |
for (x = left; x < right; x++) { |
| 836 |
colr_color(ctmp, scanline[x]); |
| 837 |
addcolor(clr, ctmp); |
| 838 |
} |
| 839 |
} |
| 840 |
d = 1.0/((right-left)*(bottom-top)); |
| 841 |
scalecolor(clr, d); |
| 842 |
ll = left; lr = right; lt = top; lb = bottom; |
| 843 |
copycolor(lc, clr); |
| 844 |
return(0); |
| 845 |
} |
| 846 |
|
| 847 |
|
| 848 |
getmono() /* get monochrome data */ |
| 849 |
{ |
| 850 |
register unsigned char *dp; |
| 851 |
register int x, err; |
| 852 |
int y, errp; |
| 853 |
short *cerr; |
| 854 |
|
| 855 |
if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
| 856 |
quiterr("out of memory in getmono"); |
| 857 |
dp = ourdata - 1; |
| 858 |
for (y = 0; y < ymax; y++) { |
| 859 |
getscan(y); |
| 860 |
add2icon(y, scanline); |
| 861 |
normcolrs(scanline, xmax, scale); |
| 862 |
err = 0; |
| 863 |
for (x = 0; x < xmax; x++) { |
| 864 |
if (!(x&7)) |
| 865 |
*++dp = 0; |
| 866 |
errp = err; |
| 867 |
err += normbright(scanline[x]) + cerr[x]; |
| 868 |
if (err > 127) |
| 869 |
err -= 255; |
| 870 |
else |
| 871 |
*dp |= 1<<(7-(x&07)); |
| 872 |
err /= 3; |
| 873 |
cerr[x] = err + errp; |
| 874 |
} |
| 875 |
} |
| 876 |
free((char *)cerr); |
| 877 |
} |
| 878 |
|
| 879 |
|
| 880 |
add2icon(y, scan) /* add a scanline to our icon data */ |
| 881 |
int y; |
| 882 |
COLR *scan; |
| 883 |
{ |
| 884 |
static short cerr[ICONSIZ]; |
| 885 |
static int ynext; |
| 886 |
static char *dp; |
| 887 |
COLR clr; |
| 888 |
register int err; |
| 889 |
register int x, ti; |
| 890 |
int errp; |
| 891 |
|
| 892 |
if (iconheight == 0) { /* initialize */ |
| 893 |
if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
| 894 |
iconwidth = xmax; |
| 895 |
iconheight = ymax; |
| 896 |
} else if (xmax > ymax) { |
| 897 |
iconwidth = ICONSIZ; |
| 898 |
iconheight = ICONSIZ*ymax/xmax; |
| 899 |
if (iconheight < 1) |
| 900 |
iconheight = 1; |
| 901 |
} else { |
| 902 |
iconwidth = ICONSIZ*xmax/ymax; |
| 903 |
if (iconwidth < 1) |
| 904 |
iconwidth = 1; |
| 905 |
iconheight = ICONSIZ; |
| 906 |
} |
| 907 |
ynext = 0; |
| 908 |
dp = icondata - 1; |
| 909 |
} |
| 910 |
if (y < ynext*ymax/iconheight) /* skip this one */ |
| 911 |
return; |
| 912 |
err = 0; |
| 913 |
for (x = 0; x < iconwidth; x++) { |
| 914 |
if (!(x&7)) |
| 915 |
*++dp = 0; |
| 916 |
errp = err; |
| 917 |
ti = x*xmax/iconwidth; |
| 918 |
copycolr(clr, scan[ti]); |
| 919 |
normcolrs(clr, 1, scale); |
| 920 |
err += normbright(clr) + cerr[x]; |
| 921 |
if (err > 127) |
| 922 |
err -= 255; |
| 923 |
else |
| 924 |
*dp |= 1<<(x&07); |
| 925 |
err /= 3; |
| 926 |
cerr[x] = err + errp; |
| 927 |
} |
| 928 |
ynext++; |
| 929 |
} |
| 930 |
|
| 931 |
|
| 932 |
getfull() /* get full (24-bit) data */ |
| 933 |
{ |
| 934 |
int y; |
| 935 |
register unsigned int4 *dp; |
| 936 |
register int x; |
| 937 |
/* set gamma correction */ |
| 938 |
setcolrgam(gamcor); |
| 939 |
/* read and convert file */ |
| 940 |
dp = (unsigned int4 *)ourdata; |
| 941 |
for (y = 0; y < ymax; y++) { |
| 942 |
getscan(y); |
| 943 |
add2icon(y, scanline); |
| 944 |
if (scale) |
| 945 |
shiftcolrs(scanline, xmax, scale); |
| 946 |
colrs_gambs(scanline, xmax); |
| 947 |
if (ourras->image->blue_mask & 1) |
| 948 |
for (x = 0; x < xmax; x++) |
| 949 |
*dp++ = (unsigned int4)scanline[x][RED] << 16 | |
| 950 |
(unsigned int4)scanline[x][GRN] << 8 | |
| 951 |
(unsigned int4)scanline[x][BLU] ; |
| 952 |
else |
| 953 |
for (x = 0; x < xmax; x++) |
| 954 |
*dp++ = (unsigned int4)scanline[x][RED] | |
| 955 |
(unsigned int4)scanline[x][GRN] << 8 | |
| 956 |
(unsigned int4)scanline[x][BLU] << 16 ; |
| 957 |
} |
| 958 |
} |
| 959 |
|
| 960 |
|
| 961 |
getgrey() /* get greyscale data */ |
| 962 |
{ |
| 963 |
int y; |
| 964 |
register unsigned char *dp; |
| 965 |
register int x; |
| 966 |
/* set gamma correction */ |
| 967 |
setcolrgam(gamcor); |
| 968 |
/* read and convert file */ |
| 969 |
dp = ourdata; |
| 970 |
for (y = 0; y < ymax; y++) { |
| 971 |
getscan(y); |
| 972 |
add2icon(y, scanline); |
| 973 |
if (scale) |
| 974 |
shiftcolrs(scanline, xmax, scale); |
| 975 |
for (x = 0; x < xmax; x++) |
| 976 |
scanline[x][GRN] = normbright(scanline[x]); |
| 977 |
colrs_gambs(scanline, xmax); |
| 978 |
if (maxcolors < 256) |
| 979 |
for (x = 0; x < xmax; x++) |
| 980 |
*dp++ = ((long)scanline[x][GRN] * |
| 981 |
maxcolors + maxcolors/2) >> 8; |
| 982 |
else |
| 983 |
for (x = 0; x < xmax; x++) |
| 984 |
*dp++ = scanline[x][GRN]; |
| 985 |
} |
| 986 |
for (x = 0; x < maxcolors; x++) |
| 987 |
clrtab[x][RED] = clrtab[x][GRN] = |
| 988 |
clrtab[x][BLU] = ((long)x*256 + 128)/maxcolors; |
| 989 |
} |
| 990 |
|
| 991 |
|
| 992 |
getmapped() /* get color-mapped data */ |
| 993 |
{ |
| 994 |
int y; |
| 995 |
/* make sure we can do it first */ |
| 996 |
if (fname == NULL) |
| 997 |
quiterr("cannot map colors from standard input"); |
| 998 |
/* set gamma correction */ |
| 999 |
setcolrgam(gamcor); |
| 1000 |
/* make histogram */ |
| 1001 |
if (new_histo((long)xmax*ymax) == -1) |
| 1002 |
quiterr("cannot initialize histogram"); |
| 1003 |
for (y = 0; y < ymax; y++) { |
| 1004 |
if (getscan(y) < 0) |
| 1005 |
break; |
| 1006 |
add2icon(y, scanline); |
| 1007 |
if (scale) |
| 1008 |
shiftcolrs(scanline, xmax, scale); |
| 1009 |
colrs_gambs(scanline, xmax); |
| 1010 |
cnt_colrs(scanline, xmax); |
| 1011 |
} |
| 1012 |
/* map pixels */ |
| 1013 |
if (!new_clrtab(maxcolors)) |
| 1014 |
quiterr("cannot create color map"); |
| 1015 |
for (y = 0; y < ymax; y++) { |
| 1016 |
getscan(y); |
| 1017 |
if (scale) |
| 1018 |
shiftcolrs(scanline, xmax, scale); |
| 1019 |
colrs_gambs(scanline, xmax); |
| 1020 |
if (dither) |
| 1021 |
dith_colrs(ourdata+y*xmax, scanline, xmax); |
| 1022 |
else |
| 1023 |
map_colrs(ourdata+y*xmax, scanline, xmax); |
| 1024 |
} |
| 1025 |
} |
| 1026 |
|
| 1027 |
|
| 1028 |
scale_rcolors(xr, sf) /* scale color map */ |
| 1029 |
register XRASTER *xr; |
| 1030 |
double sf; |
| 1031 |
{ |
| 1032 |
register int i; |
| 1033 |
long maxv; |
| 1034 |
|
| 1035 |
if (xr->pixels == NULL) |
| 1036 |
return; |
| 1037 |
|
| 1038 |
sf = pow(sf, 1.0/gamcor); |
| 1039 |
maxv = 65535/sf; |
| 1040 |
|
| 1041 |
for (i = xr->ncolors; i--; ) { |
| 1042 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
| 1043 |
65535 : |
| 1044 |
xr->cdefs[i].red * sf; |
| 1045 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
| 1046 |
65535 : |
| 1047 |
xr->cdefs[i].green * sf; |
| 1048 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
| 1049 |
65535 : |
| 1050 |
xr->cdefs[i].blue * sf; |
| 1051 |
} |
| 1052 |
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
| 1053 |
} |
| 1054 |
|
| 1055 |
|
| 1056 |
getscan(y) |
| 1057 |
int y; |
| 1058 |
{ |
| 1059 |
static int trunced = -1; /* truncated file? */ |
| 1060 |
skipit: |
| 1061 |
if (trunced >= 0 && y >= trunced) { |
| 1062 |
bzero(scanline, xmax*sizeof(COLR)); |
| 1063 |
return(-1); |
| 1064 |
} |
| 1065 |
if (y != cury) { |
| 1066 |
if (scanpos == NULL || scanpos[y] == -1) |
| 1067 |
return(-1); |
| 1068 |
if (fseek(fin, scanpos[y], 0) == -1) |
| 1069 |
quiterr("fseek error"); |
| 1070 |
cury = y; |
| 1071 |
} else if (scanpos != NULL && scanpos[y] == -1) |
| 1072 |
scanpos[y] = ftell(fin); |
| 1073 |
|
| 1074 |
if (freadcolrs(scanline, xmax, fin) < 0) { |
| 1075 |
fprintf(stderr, "%s: %s: unfinished picture\n", |
| 1076 |
progname, fname==NULL?"<stdin>":fname); |
| 1077 |
trunced = y; |
| 1078 |
goto skipit; |
| 1079 |
} |
| 1080 |
cury++; |
| 1081 |
return(0); |
| 1082 |
} |
