| 1 |
/* Copyright (c) 1987 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* ximage.c - driver for X-windows |
| 9 |
* |
| 10 |
* 4/30/87 |
| 11 |
* 3/3/88 Added calls to xraster & Paul Heckbert's ciq routines |
| 12 |
*/ |
| 13 |
|
| 14 |
#include "standard.h" |
| 15 |
|
| 16 |
#include <X/Xlib.h> |
| 17 |
#include <X/cursors/bcross.cursor> |
| 18 |
#include <X/cursors/bcross_mask.cursor> |
| 19 |
|
| 20 |
#include <sys/types.h> |
| 21 |
|
| 22 |
#include <ctype.h> |
| 23 |
|
| 24 |
#include "color.h" |
| 25 |
|
| 26 |
#include "xraster.h" |
| 27 |
|
| 28 |
#include "view.h" |
| 29 |
|
| 30 |
#include "pic.h" |
| 31 |
|
| 32 |
#define controlshift(e) (((XButtonEvent *)(e))->detail & (ShiftMask|ControlMask)) |
| 33 |
|
| 34 |
#define FONTNAME "9x15" /* text font we'll use */ |
| 35 |
|
| 36 |
#define CTRL(c) ('c'-'@') |
| 37 |
|
| 38 |
#define BORWIDTH 5 /* border width */ |
| 39 |
#define BARHEIGHT 25 /* menu bar size */ |
| 40 |
|
| 41 |
double gamcor = 2.0; /* gamcor correction */ |
| 42 |
|
| 43 |
XRASTER ourras; /* our stored raster image */ |
| 44 |
|
| 45 |
int dither = 1; /* dither colors? */ |
| 46 |
int fast = 0; /* keep picture in Pixmap? */ |
| 47 |
|
| 48 |
Window wind = 0; /* our output window */ |
| 49 |
Font fontid; /* our font */ |
| 50 |
|
| 51 |
int maxcolors = 0; /* maximum colors */ |
| 52 |
int greyscale = 0; /* in grey */ |
| 53 |
|
| 54 |
int xoff = 0; /* x image offset */ |
| 55 |
int yoff = 0; /* y image offset */ |
| 56 |
|
| 57 |
VIEW ourview = STDVIEW(0); /* image view parameters */ |
| 58 |
int gotview = 0; /* got parameters from file */ |
| 59 |
|
| 60 |
COLR *scanline; /* scan line buffer */ |
| 61 |
|
| 62 |
int xmax, ymax; /* picture resolution */ |
| 63 |
int width, height; /* window size */ |
| 64 |
char *fname = NULL; /* input file name */ |
| 65 |
FILE *fin = stdin; /* input file */ |
| 66 |
long *scanpos = NULL; /* scan line positions in file */ |
| 67 |
int cury = 0; /* current scan location */ |
| 68 |
|
| 69 |
double exposure = 1.0; /* exposure compensation used */ |
| 70 |
|
| 71 |
struct { |
| 72 |
int xmin, ymin, xsiz, ysiz; |
| 73 |
} box = {0, 0, 0, 0}; /* current box */ |
| 74 |
|
| 75 |
char *geometry = NULL; /* geometry specification */ |
| 76 |
|
| 77 |
char *progname; |
| 78 |
|
| 79 |
char errmsg[128]; |
| 80 |
|
| 81 |
extern long ftell(); |
| 82 |
|
| 83 |
extern char *malloc(), *calloc(); |
| 84 |
|
| 85 |
extern double atof(); |
| 86 |
|
| 87 |
|
| 88 |
main(argc, argv) |
| 89 |
int argc; |
| 90 |
char *argv[]; |
| 91 |
{ |
| 92 |
int headline(); |
| 93 |
int i; |
| 94 |
|
| 95 |
progname = argv[0]; |
| 96 |
|
| 97 |
for (i = 1; i < argc; i++) |
| 98 |
if (argv[i][0] == '-') |
| 99 |
switch (argv[i][1]) { |
| 100 |
case 'c': |
| 101 |
maxcolors = atoi(argv[++i]); |
| 102 |
break; |
| 103 |
case 'b': |
| 104 |
greyscale = !greyscale; |
| 105 |
break; |
| 106 |
case 'm': |
| 107 |
maxcolors = 2; |
| 108 |
break; |
| 109 |
case 'd': |
| 110 |
dither = !dither; |
| 111 |
break; |
| 112 |
case 'f': |
| 113 |
fast = !fast; |
| 114 |
break; |
| 115 |
case 'g': |
| 116 |
gamcor = atof(argv[++i]); |
| 117 |
break; |
| 118 |
default: |
| 119 |
goto userr; |
| 120 |
} |
| 121 |
else if (argv[i][0] == '=') |
| 122 |
geometry = argv[i]; |
| 123 |
else |
| 124 |
break; |
| 125 |
|
| 126 |
if (argc-i == 1) { |
| 127 |
fname = argv[i]; |
| 128 |
fin = fopen(fname, "r"); |
| 129 |
if (fin == NULL) { |
| 130 |
sprintf(errmsg, "can't open file \"%s\"", fname); |
| 131 |
quiterr(errmsg); |
| 132 |
} |
| 133 |
} else |
| 134 |
goto userr; |
| 135 |
|
| 136 |
/* get header */ |
| 137 |
getheader(fin, headline); |
| 138 |
/* get picture dimensions */ |
| 139 |
if (fscanf(fin, "-Y %d +X %d\n", &ymax, &xmax) != 2) |
| 140 |
quiterr("bad picture size"); |
| 141 |
/* set view parameters */ |
| 142 |
if (gotview) { |
| 143 |
ourview.hresolu = xmax; |
| 144 |
ourview.vresolu = ymax; |
| 145 |
if (setview(&ourview) != NULL) |
| 146 |
gotview = 0; |
| 147 |
} |
| 148 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
| 149 |
quiterr("out of memory"); |
| 150 |
|
| 151 |
init(); /* get file and open window */ |
| 152 |
|
| 153 |
for ( ; ; ) |
| 154 |
getevent(); /* main loop */ |
| 155 |
userr: |
| 156 |
fprintf(stderr, |
| 157 |
"Usage: %s [=geometry][-b][-m][-d][-f][-c ncolors] file\n", |
| 158 |
progname); |
| 159 |
quit(1); |
| 160 |
} |
| 161 |
|
| 162 |
|
| 163 |
headline(s) /* get relevant info from header */ |
| 164 |
char *s; |
| 165 |
{ |
| 166 |
static char *altname[] = {"rview","rpict","VIEW=",NULL}; |
| 167 |
register char **an; |
| 168 |
|
| 169 |
if (!strncmp(s, "EXPOSURE=", 9)) |
| 170 |
exposure *= atof(s+9); |
| 171 |
else |
| 172 |
for (an = altname; *an != NULL; an++) |
| 173 |
if (!strncmp(*an, s, strlen(*an))) { |
| 174 |
if (sscanview(&ourview, s+strlen(*an)) == 0) |
| 175 |
gotview++; |
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return; |
| 177 |
} |
| 178 |
} |
| 179 |
|
| 180 |
|
| 181 |
char * |
| 182 |
sskip(s) /* skip a word */ |
| 183 |
register char *s; |
| 184 |
{ |
| 185 |
while (isspace(*s)) s++; |
| 186 |
while (*s && !isspace(*s)) s++; |
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return(s); |
| 188 |
} |
| 189 |
|
| 190 |
|
| 191 |
init() /* get data and open window */ |
| 192 |
{ |
| 193 |
register int i; |
| 194 |
colormap ourmap; |
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OpaqueFrame mainframe; |
| 196 |
char defgeom[32]; |
| 197 |
|
| 198 |
if (fname != NULL) { |
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scanpos = (long *)malloc(ymax*sizeof(long)); |
| 200 |
if (scanpos == NULL) |
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goto memerr; |
| 202 |
for (i = 0; i < ymax; i++) |
| 203 |
scanpos[i] = -1; |
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} |
| 205 |
if (XOpenDisplay(NULL) == NULL) |
| 206 |
quiterr("can't open display; DISPLAY variable set?"); |
| 207 |
#ifdef notdef |
| 208 |
if (DisplayWidth() - 2*BORWIDTH < xmax || |
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DisplayHeight() - 2*BORWIDTH - BARHEIGHT < ymax) |
| 210 |
quiterr("resolution mismatch"); |
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#endif |
| 212 |
if (maxcolors == 0) { /* get number of available colors */ |
| 213 |
maxcolors = 1<<DisplayPlanes(); |
| 214 |
if (maxcolors > 4) maxcolors -= 2; |
| 215 |
} |
| 216 |
ourras.width = xmax; |
| 217 |
ourras.height = ymax; |
| 218 |
/* store image */ |
| 219 |
if (maxcolors <= 2) { /* monochrome */ |
| 220 |
ourras.data.m = (unsigned short *)malloc(BitmapSize(xmax,ymax)); |
| 221 |
if (ourras.data.m == NULL) |
| 222 |
goto memerr; |
| 223 |
getmono(); |
| 224 |
} else { |
| 225 |
ourras.data.bz = (unsigned char *)malloc(BZPixmapSize(xmax,ymax)); |
| 226 |
if (ourras.data.bz == NULL) |
| 227 |
goto memerr; |
| 228 |
if (greyscale) |
| 229 |
biq(dither,maxcolors,1,ourmap); |
| 230 |
else |
| 231 |
ciq(dither,maxcolors,1,ourmap); |
| 232 |
if (init_rcolors(&ourras, ourmap) == 0) |
| 233 |
goto memerr; |
| 234 |
} |
| 235 |
mainframe.bdrwidth = BORWIDTH; |
| 236 |
mainframe.border = WhitePixmap; |
| 237 |
mainframe.background = BlackPixmap; |
| 238 |
sprintf(defgeom, "=%dx%d+0+22", xmax, ymax); |
| 239 |
wind = XCreate("Radiance Image", progname, geometry, defgeom, |
| 240 |
&mainframe, 16, 16); |
| 241 |
if (wind == 0) |
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quiterr("can't create window"); |
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width = mainframe.width; |
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height = mainframe.height; |
| 245 |
fontid = XGetFont(FONTNAME); |
| 246 |
if (fontid == 0) |
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quiterr("can't get font"); |
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XStoreName(wind, fname == NULL ? progname : fname); |
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XDefineCursor(wind, XCreateCursor(bcross_width, bcross_height, |
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bcross_bits, bcross_mask_bits, |
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bcross_x_hot, bcross_y_hot, |
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BlackPixel, WhitePixel, GXcopy)); |
| 253 |
XSelectInput(wind, ButtonPressed|ButtonReleased|UnmapWindow |
| 254 |
|RightDownMotion|MiddleDownMotion|LeftDownMotion |
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|KeyPressed|ExposeWindow|ExposeRegion); |
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XMapWindow(wind); |
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return; |
| 258 |
memerr: |
| 259 |
quiterr("out of memory"); |
| 260 |
} |
| 261 |
|
| 262 |
|
| 263 |
quiterr(err) /* print message and exit */ |
| 264 |
char *err; |
| 265 |
{ |
| 266 |
if (err != NULL) |
| 267 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 268 |
|
| 269 |
exit(err == NULL ? 0 : 1); |
| 270 |
} |
| 271 |
|
| 272 |
|
| 273 |
eputs(s) |
| 274 |
char *s; |
| 275 |
{ |
| 276 |
fputs(s, stderr); |
| 277 |
} |
| 278 |
|
| 279 |
|
| 280 |
quit(code) |
| 281 |
int code; |
| 282 |
{ |
| 283 |
exit(code); |
| 284 |
} |
| 285 |
|
| 286 |
|
| 287 |
getevent() /* process the next event */ |
| 288 |
{ |
| 289 |
WindowInfo info; |
| 290 |
XEvent e; |
| 291 |
|
| 292 |
XNextEvent(&e); |
| 293 |
switch (e.type) { |
| 294 |
case KeyPressed: |
| 295 |
docom(&e); |
| 296 |
break; |
| 297 |
case ExposeWindow: |
| 298 |
XQueryWindow(wind, &info); /* in case resized */ |
| 299 |
width = info.width; |
| 300 |
height = info.height; |
| 301 |
/* fall through */ |
| 302 |
case ExposeRegion: |
| 303 |
fixwindow(&e); |
| 304 |
break; |
| 305 |
case UnmapWindow: |
| 306 |
unmap_rcolors(&ourras); |
| 307 |
break; |
| 308 |
case ButtonPressed: |
| 309 |
if (controlshift(&e)) |
| 310 |
moveimage(&e); |
| 311 |
else |
| 312 |
getbox(&e); |
| 313 |
break; |
| 314 |
} |
| 315 |
} |
| 316 |
|
| 317 |
|
| 318 |
fixwindow(eexp) /* fix new or stepped-on window */ |
| 319 |
XExposeEvent *eexp; |
| 320 |
{ |
| 321 |
redraw(eexp->x, eexp->y, eexp->width, eexp->height); |
| 322 |
} |
| 323 |
|
| 324 |
|
| 325 |
redraw(x, y, w, h) /* redraw section of window */ |
| 326 |
int x, y; |
| 327 |
int w, h; |
| 328 |
{ |
| 329 |
map_rcolors(&ourras); |
| 330 |
if (fast) |
| 331 |
make_rpixmap(&ourras); |
| 332 |
return(patch_raster(wind,x-xoff,y-yoff,x,y,w,h,&ourras) ? 0 : -1); |
| 333 |
} |
| 334 |
|
| 335 |
|
| 336 |
docom(ekey) /* execute command */ |
| 337 |
XKeyEvent *ekey; |
| 338 |
{ |
| 339 |
char buf[80]; |
| 340 |
COLOR cval; |
| 341 |
char *cp; |
| 342 |
int n; |
| 343 |
FVECT rorg, rdir; |
| 344 |
|
| 345 |
cp = XLookupMapping(ekey, &n); |
| 346 |
if (n == 0) |
| 347 |
return(0); |
| 348 |
switch (*cp) { /* interpret command */ |
| 349 |
case 'q': |
| 350 |
case CTRL(D): /* quiterr */ |
| 351 |
quit(0); |
| 352 |
case '\n': |
| 353 |
case '\r': |
| 354 |
case 'l': |
| 355 |
case 'c': /* value */ |
| 356 |
if (avgbox(cval) == -1) |
| 357 |
return(-1); |
| 358 |
switch (*cp) { |
| 359 |
case '\n': |
| 360 |
case '\r': /* radiance */ |
| 361 |
sprintf(buf, "%-3g", intens(cval)/exposure); |
| 362 |
break; |
| 363 |
case 'l': /* luminance */ |
| 364 |
sprintf(buf, "%-3gL", bright(cval)*683.0/exposure); |
| 365 |
break; |
| 366 |
case 'c': /* color */ |
| 367 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 368 |
colval(cval,RED), |
| 369 |
colval(cval,GRN), |
| 370 |
colval(cval,BLU)); |
| 371 |
break; |
| 372 |
} |
| 373 |
XText(wind, box.xmin, box.ymin, buf, strlen(buf), |
| 374 |
fontid, BlackPixel, WhitePixel); |
| 375 |
return(0); |
| 376 |
case 'p': /* position */ |
| 377 |
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
| 378 |
XText(wind, ekey->x, ekey->y, buf, strlen(buf), |
| 379 |
fontid, BlackPixel, WhitePixel); |
| 380 |
return(0); |
| 381 |
case 't': /* trace */ |
| 382 |
if (!gotview) { |
| 383 |
XFeep(0); |
| 384 |
return(-1); |
| 385 |
} |
| 386 |
rayview(rorg, rdir, &ourview, |
| 387 |
ekey->x-xoff + .5, ymax-1-ekey->y+yoff + .5); |
| 388 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
| 389 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
| 390 |
fflush(stdout); |
| 391 |
return(0); |
| 392 |
case CTRL(R): /* redraw */ |
| 393 |
XClear(wind); |
| 394 |
return(redraw(0, 0, width, height)); |
| 395 |
case ' ': /* clear */ |
| 396 |
return(redraw(box.xmin, box.ymin, box.xsiz, box.ysiz)); |
| 397 |
default: |
| 398 |
XFeep(0); |
| 399 |
return(-1); |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
|
| 404 |
moveimage(ep) /* shift the image */ |
| 405 |
XButtonEvent *ep; |
| 406 |
{ |
| 407 |
XButtonEvent eb; |
| 408 |
|
| 409 |
XMaskEvent(ButtonReleased, &eb); |
| 410 |
xoff += eb.x - ep->x; |
| 411 |
yoff += eb.y - ep->y; |
| 412 |
XClear(wind); |
| 413 |
return(redraw(0, 0, width, height)); |
| 414 |
} |
| 415 |
|
| 416 |
|
| 417 |
getbox(ebut) /* get new box */ |
| 418 |
XButtonEvent *ebut; |
| 419 |
{ |
| 420 |
union { |
| 421 |
XEvent e; |
| 422 |
XButtonEvent b; |
| 423 |
XMouseMovedEvent m; |
| 424 |
} e; |
| 425 |
|
| 426 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
| 427 |
while (e.e.type == MouseMoved) { |
| 428 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
| 429 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
| 430 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
| 431 |
} |
| 432 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
| 433 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
| 434 |
if (box.xmin > ebut->x) { |
| 435 |
box.xsiz = box.xmin - ebut->x + 1; |
| 436 |
box.xmin = ebut->x; |
| 437 |
} else { |
| 438 |
box.xsiz = ebut->x - box.xmin + 1; |
| 439 |
} |
| 440 |
if (box.ymin > ebut->y) { |
| 441 |
box.ysiz = box.ymin - ebut->y + 1; |
| 442 |
box.ymin = ebut->y; |
| 443 |
} else { |
| 444 |
box.ysiz = ebut->y - box.ymin + 1; |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
|
| 449 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 450 |
int x0, y0, x1, y1; |
| 451 |
{ |
| 452 |
XLine(wind, x0, y0, x1, y0, 1, 1, 0, GXinvert, AllPlanes); |
| 453 |
XLine(wind, x0, y1, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 454 |
XLine(wind, x0, y0, x0, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 455 |
XLine(wind, x1, y0, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 456 |
} |
| 457 |
|
| 458 |
|
| 459 |
avgbox(clr) /* average color over current box */ |
| 460 |
COLOR clr; |
| 461 |
{ |
| 462 |
int left, right, top, bottom; |
| 463 |
int y; |
| 464 |
double d; |
| 465 |
COLOR ctmp; |
| 466 |
register int x; |
| 467 |
|
| 468 |
setcolor(clr, 0.0, 0.0, 0.0); |
| 469 |
left = box.xmin - xoff; |
| 470 |
right = left + box.xsiz; |
| 471 |
if (left < 0) |
| 472 |
left = 0; |
| 473 |
if (right > xmax) |
| 474 |
right = xmax; |
| 475 |
if (left >= right) |
| 476 |
return(-1); |
| 477 |
top = box.ymin - yoff; |
| 478 |
bottom = top + box.ysiz; |
| 479 |
if (top < 0) |
| 480 |
top = 0; |
| 481 |
if (bottom > ymax) |
| 482 |
bottom = ymax; |
| 483 |
if (top >= bottom) |
| 484 |
return(-1); |
| 485 |
for (y = top; y < bottom; y++) { |
| 486 |
if (getscan(y) == -1) |
| 487 |
return(-1); |
| 488 |
for (x = left; x < right; x++) { |
| 489 |
colr_color(ctmp, scanline[x]); |
| 490 |
addcolor(clr, ctmp); |
| 491 |
} |
| 492 |
} |
| 493 |
d = 1.0/((right-left)*(bottom-top)); |
| 494 |
scalecolor(clr, d); |
| 495 |
return(0); |
| 496 |
} |
| 497 |
|
| 498 |
|
| 499 |
getmono() /* get monochrome data */ |
| 500 |
{ |
| 501 |
register unsigned short *dp; |
| 502 |
register int x, err; |
| 503 |
int y; |
| 504 |
rgbpixel *inline; |
| 505 |
short *cerr; |
| 506 |
|
| 507 |
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
| 508 |
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
| 509 |
quit("out of memory in getmono"); |
| 510 |
dp = ourras.data.m - 1; |
| 511 |
for (y = 0; y < ymax; y++) { |
| 512 |
picreadline3(y, inline); |
| 513 |
err = 0; |
| 514 |
for (x = 0; x < xmax; x++) { |
| 515 |
if (!(x&0xf)) |
| 516 |
*++dp = 0; |
| 517 |
err += rgb_bright(&inline[x]) + cerr[x]; |
| 518 |
if (err > 127) |
| 519 |
err -= 255; |
| 520 |
else |
| 521 |
*dp |= 1<<(x&0xf); |
| 522 |
cerr[x] = err >>= 1; |
| 523 |
} |
| 524 |
} |
| 525 |
free((char *)inline); |
| 526 |
free((char *)cerr); |
| 527 |
} |
| 528 |
|
| 529 |
|
| 530 |
init_rcolors(xr, cmap) /* assign color values */ |
| 531 |
register XRASTER *xr; |
| 532 |
colormap cmap; |
| 533 |
{ |
| 534 |
register int i; |
| 535 |
register unsigned char *p; |
| 536 |
|
| 537 |
xr->pmap = (int *)malloc(256*sizeof(int)); |
| 538 |
if (xr->pmap == NULL) |
| 539 |
return(0); |
| 540 |
xr->cdefs = (Color *)malloc(256*sizeof(Color)); |
| 541 |
if (xr->cdefs == NULL) |
| 542 |
return(0); |
| 543 |
for (i = 0; i < 256; i++) |
| 544 |
xr->pmap[i] = -1; |
| 545 |
xr->ncolors = 0; |
| 546 |
for (p = xr->data.bz, i = BZPixmapSize(xr->width,xr->height); i--; p++) |
| 547 |
if (xr->pmap[*p] == -1) { |
| 548 |
xr->cdefs[xr->ncolors].red = cmap[0][*p] << 8; |
| 549 |
xr->cdefs[xr->ncolors].green = cmap[1][*p] << 8; |
| 550 |
xr->cdefs[xr->ncolors].blue = cmap[2][*p] << 8; |
| 551 |
xr->cdefs[xr->ncolors].pixel = *p; |
| 552 |
xr->pmap[*p] = xr->ncolors++; |
| 553 |
} |
| 554 |
xr->cdefs = (Color *)realloc((char *)xr->cdefs, xr->ncolors*sizeof(Color)); |
| 555 |
if (xr->cdefs == NULL) |
| 556 |
return(0); |
| 557 |
return(1); |
| 558 |
} |
| 559 |
|
| 560 |
|
| 561 |
getscan(y) |
| 562 |
int y; |
| 563 |
{ |
| 564 |
if (y != cury) { |
| 565 |
if (scanpos == NULL || scanpos[y] == -1) |
| 566 |
return(-1); |
| 567 |
if (fseek(fin, scanpos[y], 0) == -1) |
| 568 |
quit("fseek error"); |
| 569 |
cury = y; |
| 570 |
} else if (scanpos != NULL) |
| 571 |
scanpos[y] = ftell(fin); |
| 572 |
|
| 573 |
if (freadcolrs(scanline, xmax, fin) < 0) |
| 574 |
quiterr("read error"); |
| 575 |
|
| 576 |
cury++; |
| 577 |
return(0); |
| 578 |
} |
| 579 |
|
| 580 |
|
| 581 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
| 582 |
int y; |
| 583 |
register rgbpixel *l3; |
| 584 |
{ |
| 585 |
register BYTE *l4; |
| 586 |
register int shift, c; |
| 587 |
int i; |
| 588 |
|
| 589 |
if (getscan(y) < 0) |
| 590 |
quiterr("cannot seek for picreadline"); |
| 591 |
/* convert scanline */ |
| 592 |
for (l4=scanline[0], i=xmax; i--; l4+=4, l3++) { |
| 593 |
shift = l4[EXP] - COLXS; |
| 594 |
if (shift >= 8) { |
| 595 |
l3->r = l3->g = l3->b = 255; |
| 596 |
} else if (shift <= -8) { |
| 597 |
l3->r = l3->g = l3->b = 0; |
| 598 |
} else if (shift > 0) { |
| 599 |
c = l4[RED] << shift; |
| 600 |
l3->r = c > 255 ? 255 : c; |
| 601 |
c = l4[GRN] << shift; |
| 602 |
l3->g = c > 255 ? 255 : c; |
| 603 |
c = l4[BLU] << shift; |
| 604 |
l3->b = c > 255 ? 255 : c; |
| 605 |
} else if (shift < 0) { |
| 606 |
l3->r = l4[RED] >> -shift; |
| 607 |
l3->g = l4[GRN] >> -shift; |
| 608 |
l3->b = l4[BLU] >> -shift; |
| 609 |
} else { |
| 610 |
l3->r = l4[RED]; |
| 611 |
l3->g = l4[GRN]; |
| 612 |
l3->b = l4[BLU]; |
| 613 |
} |
| 614 |
} |
| 615 |
} |
| 616 |
|
| 617 |
|
| 618 |
picwriteline(y, l) /* add 8-bit scanline to image */ |
| 619 |
int y; |
| 620 |
pixel *l; |
| 621 |
{ |
| 622 |
bcopy(l, ourras.data.bz+BZPixmapSize(xmax,y), BZPixmapSize(xmax,1)); |
| 623 |
} |
| 624 |
|
| 625 |
|
| 626 |
picreadcm(map) /* do gamcor correction */ |
| 627 |
colormap map; |
| 628 |
{ |
| 629 |
extern double pow(); |
| 630 |
register int i, val; |
| 631 |
|
| 632 |
for (i = 0; i < 256; i++) { |
| 633 |
val = pow(i/256.0, 1.0/gamcor) * 256.0; |
| 634 |
map[0][i] = map[1][i] = map[2][i] = val; |
| 635 |
} |
| 636 |
} |
| 637 |
|
| 638 |
|
| 639 |
picwritecm(map) /* handled elsewhere */ |
| 640 |
colormap map; |
| 641 |
{ |
| 642 |
} |
