1 |
/* Copyright (c) 1991 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 |
* |
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* Anat Grynberg and Greg Ward |
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*/ |
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|
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|
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#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 |
#include "resolu.h" |
34 |
|
35 |
#define FONTNAME "8x13" /* text font we'll use */ |
36 |
|
37 |
#define CTRL(c) ('c'-'@') |
38 |
|
39 |
#define BORWIDTH 5 /* border width */ |
40 |
|
41 |
#define ICONSIZ (8*10) /* maximum icon dimension (even 8) */ |
42 |
|
43 |
#define ourscreen DefaultScreen(thedisplay) |
44 |
#define ourblack BlackPixel(thedisplay,ourscreen) |
45 |
#define ourwhite WhitePixel(thedisplay,ourscreen) |
46 |
#define ourroot RootWindow(thedisplay,ourscreen) |
47 |
#define ourgc DefaultGC(thedisplay,ourscreen) |
48 |
|
49 |
#define revline(x0,y0,x1,y1) XDrawLine(thedisplay,wind,revgc,x0,y0,x1,y1) |
50 |
|
51 |
#define redraw(x,y,w,h) patch_raster(wind,(x)-xoff,(y)-yoff,x,y,w,h,ourras) |
52 |
|
53 |
double gamcor = 2.2; /* gamma correction */ |
54 |
|
55 |
int dither = 1; /* dither colors? */ |
56 |
int fast = 0; /* keep picture in Pixmap? */ |
57 |
|
58 |
Window wind = 0; /* our output window */ |
59 |
Font fontid; /* our font */ |
60 |
|
61 |
int maxcolors = 0; /* maximum colors */ |
62 |
int greyscale = 0; /* in grey */ |
63 |
|
64 |
int scale = 0; /* scalefactor; power of two */ |
65 |
|
66 |
int xoff = 0; /* x image offset */ |
67 |
int yoff = 0; /* y image offset */ |
68 |
|
69 |
VIEW ourview = STDVIEW; /* image view parameters */ |
70 |
int gotview = 0; /* got parameters from file */ |
71 |
|
72 |
COLR *scanline; /* scan line buffer */ |
73 |
|
74 |
RESOLU inpres; /* input resolution and ordering */ |
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int xmax, ymax; /* picture dimensions */ |
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int width, height; /* window size */ |
77 |
char *fname = NULL; /* input file name */ |
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FILE *fin = stdin; /* input file */ |
79 |
long *scanpos = NULL; /* scan line positions in file */ |
80 |
int cury = 0; /* current scan location */ |
81 |
|
82 |
double exposure = 1.0; /* exposure compensation used */ |
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|
84 |
int wrongformat = 0; /* input in another format? */ |
85 |
|
86 |
GC revgc; /* graphics context with GXinvert */ |
87 |
|
88 |
XRASTER *ourras; /* our stored image */ |
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unsigned char *ourdata; /* our image data */ |
90 |
|
91 |
struct { |
92 |
int xmin, ymin, xsiz, ysiz; |
93 |
} box = {0, 0, 0, 0}; /* current box */ |
94 |
|
95 |
char *geometry = NULL; /* geometry specification */ |
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|
97 |
char icondata[ICONSIZ*ICONSIZ/8]; /* icon bitmap data */ |
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int iconwidth = 0, iconheight = 0; |
99 |
|
100 |
char *progname; |
101 |
|
102 |
char errmsg[128]; |
103 |
|
104 |
extern long ftell(); |
105 |
|
106 |
extern char *malloc(), *calloc(); |
107 |
|
108 |
extern double pow(), log(); |
109 |
|
110 |
Display *thedisplay; |
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|
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main(argc, argv) |
113 |
int argc; |
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char *argv[]; |
115 |
{ |
116 |
int headline(); |
117 |
int i; |
118 |
|
119 |
progname = argv[0]; |
120 |
|
121 |
for (i = 1; i < argc; i++) |
122 |
if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
124 |
case 'c': |
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maxcolors = atoi(argv[++i]); |
126 |
break; |
127 |
case 'b': |
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greyscale = !greyscale; |
129 |
break; |
130 |
case 'm': |
131 |
maxcolors = 2; |
132 |
break; |
133 |
case 'd': |
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dither = !dither; |
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break; |
136 |
case 'f': |
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fast = !fast; |
138 |
break; |
139 |
case 'e': |
140 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
141 |
goto userr; |
142 |
scale = atoi(argv[++i]); |
143 |
break; |
144 |
case 'g': |
145 |
if (!strcmp(argv[i], "-geometry")) |
146 |
geometry = argv[++i]; |
147 |
else |
148 |
gamcor = atof(argv[++i]); |
149 |
break; |
150 |
default: |
151 |
goto userr; |
152 |
} |
153 |
else if (argv[i][0] == '=') |
154 |
geometry = argv[i]; |
155 |
else |
156 |
break; |
157 |
|
158 |
if (i == argc-1) { |
159 |
fname = argv[i]; |
160 |
fin = fopen(fname, "r"); |
161 |
if (fin == NULL) { |
162 |
sprintf(errmsg, "can't open file \"%s\"", fname); |
163 |
quiterr(errmsg); |
164 |
} |
165 |
} else if (i != argc) |
166 |
goto userr; |
167 |
/* get header */ |
168 |
getheader(fin, headline, NULL); |
169 |
/* get picture dimensions */ |
170 |
if (wrongformat || !fgetsresolu(&inpres, fin)) |
171 |
quiterr("bad picture format"); |
172 |
xmax = scanlen(&inpres); |
173 |
ymax = numscans(&inpres); |
174 |
/* set view parameters */ |
175 |
if (gotview && setview(&ourview) != NULL) |
176 |
gotview = 0; |
177 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
178 |
quiterr("out of memory"); |
179 |
|
180 |
init(); /* get file and open window */ |
181 |
|
182 |
for ( ; ; ) |
183 |
getevent(); /* main loop */ |
184 |
userr: |
185 |
fprintf(stderr, |
186 |
"Usage: %s [-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
187 |
progname); |
188 |
quit(1); |
189 |
} |
190 |
|
191 |
|
192 |
headline(s) /* get relevant info from header */ |
193 |
char *s; |
194 |
{ |
195 |
static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
196 |
register char **an; |
197 |
char fmt[32]; |
198 |
|
199 |
if (isexpos(s)) |
200 |
exposure *= exposval(s); |
201 |
else if (isformat(s)) { |
202 |
formatval(fmt, s); |
203 |
wrongformat = strcmp(fmt, COLRFMT); |
204 |
} else |
205 |
for (an = altname; *an != NULL; an++) |
206 |
if (!strncmp(*an, s, strlen(*an))) { |
207 |
if (sscanview(&ourview, s+strlen(*an)) > 0) |
208 |
gotview++; |
209 |
return; |
210 |
} |
211 |
} |
212 |
|
213 |
|
214 |
init() /* get data and open window */ |
215 |
{ |
216 |
XWMHints ourxwmhints; |
217 |
XSetWindowAttributes ourwinattr; |
218 |
XSizeHints oursizhints; |
219 |
register int i; |
220 |
|
221 |
if (fname != NULL) { |
222 |
scanpos = (long *)malloc(ymax*sizeof(long)); |
223 |
if (scanpos == NULL) |
224 |
goto memerr; |
225 |
for (i = 0; i < ymax; i++) |
226 |
scanpos[i] = -1; |
227 |
} |
228 |
if ((thedisplay = XOpenDisplay(NULL)) == NULL) |
229 |
quiterr("can't open display; DISPLAY variable set?"); |
230 |
if (maxcolors == 0) { /* get number of available colors */ |
231 |
i = DisplayPlanes(thedisplay,ourscreen); |
232 |
maxcolors = i > 8 ? 256 : 1<<i; |
233 |
if (maxcolors > 4) maxcolors -= 2; |
234 |
} |
235 |
/* store image */ |
236 |
getras(); |
237 |
/* open window */ |
238 |
ourwinattr.border_pixel = ourblack; |
239 |
ourwinattr.background_pixel = ourwhite; |
240 |
wind = XCreateWindow(thedisplay, ourroot, 0, 0, xmax, ymax, BORWIDTH, |
241 |
0, InputOutput, ourras->visual, |
242 |
CWBackPixel|CWBorderPixel, &ourwinattr); |
243 |
if (wind == 0) |
244 |
quiterr("can't create window"); |
245 |
width = xmax; |
246 |
height = ymax; |
247 |
fontid = XLoadFont(thedisplay, FONTNAME); |
248 |
if (fontid == 0) |
249 |
quiterr("can't get font"); |
250 |
XSetFont(thedisplay, ourgc, fontid); |
251 |
revgc = XCreateGC(thedisplay, wind, 0, 0); |
252 |
XSetFunction(thedisplay, revgc, GXinvert); |
253 |
XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
254 |
XC_diamond_cross)); |
255 |
XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
256 |
if (geometry != NULL) { |
257 |
bzero((char *)&oursizhints, sizeof(oursizhints)); |
258 |
i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
259 |
(unsigned *)&oursizhints.width, |
260 |
(unsigned *)&oursizhints.height); |
261 |
if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue)) |
262 |
oursizhints.flags |= USSize; |
263 |
else { |
264 |
oursizhints.width = xmax; |
265 |
oursizhints.height = ymax; |
266 |
oursizhints.flags |= PSize; |
267 |
} |
268 |
if ((i&(XValue|YValue)) == (XValue|YValue)) { |
269 |
oursizhints.flags |= USPosition; |
270 |
if (i & XNegative) |
271 |
oursizhints.x += DisplayWidth(thedisplay, |
272 |
ourscreen)-1-oursizhints.width-2*BORWIDTH; |
273 |
if (i & YNegative) |
274 |
oursizhints.y += DisplayHeight(thedisplay, |
275 |
ourscreen)-1-oursizhints.height-2*BORWIDTH; |
276 |
} |
277 |
XSetNormalHints(thedisplay, wind, &oursizhints); |
278 |
} |
279 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
280 |
ourxwmhints.input = True; |
281 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(thedisplay, |
282 |
wind, icondata, iconwidth, iconheight); |
283 |
XSetWMHints(thedisplay, wind, &ourxwmhints); |
284 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask |
285 |
|ButtonMotionMask|StructureNotifyMask |
286 |
|KeyPressMask|ExposureMask); |
287 |
XMapWindow(thedisplay, wind); |
288 |
return; |
289 |
memerr: |
290 |
quiterr("out of memory"); |
291 |
} /* end of init */ |
292 |
|
293 |
|
294 |
quiterr(err) /* print message and exit */ |
295 |
char *err; |
296 |
{ |
297 |
if (err != NULL) { |
298 |
fprintf(stderr, "%s: %s\n", progname, err); |
299 |
exit(1); |
300 |
} |
301 |
exit(0); |
302 |
} |
303 |
|
304 |
|
305 |
eputs(s) |
306 |
char *s; |
307 |
{ |
308 |
fputs(s, stderr); |
309 |
} |
310 |
|
311 |
|
312 |
quit(code) |
313 |
int code; |
314 |
{ |
315 |
exit(code); |
316 |
} |
317 |
|
318 |
|
319 |
getras() /* get raster file */ |
320 |
{ |
321 |
colormap ourmap; |
322 |
XVisualInfo vinfo; |
323 |
|
324 |
if (maxcolors <= 2) { /* monochrome */ |
325 |
ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
326 |
if (ourdata == NULL) |
327 |
goto fail; |
328 |
ourras = make_raster(thedisplay, ourscreen, 1, ourdata, |
329 |
xmax, ymax, 8); |
330 |
if (ourras == NULL) |
331 |
goto fail; |
332 |
getmono(); |
333 |
} else if (XMatchVisualInfo(thedisplay,ourscreen,24,TrueColor,&vinfo) |
334 |
/* kludge for DirectColor */ |
335 |
|| XMatchVisualInfo(thedisplay,ourscreen,24,DirectColor,&vinfo)) { |
336 |
ourdata = (unsigned char *)malloc(xmax*ymax*3); |
337 |
if (ourdata == NULL) |
338 |
goto fail; |
339 |
ourras = make_raster(thedisplay, ourscreen, 24, ourdata, |
340 |
xmax, ymax, 8); |
341 |
if (ourras == NULL) |
342 |
goto fail; |
343 |
getfull(); |
344 |
} else { |
345 |
ourdata = (unsigned char *)malloc(xmax*ymax); |
346 |
if (ourdata == NULL) |
347 |
goto fail; |
348 |
ourras = make_raster(thedisplay, ourscreen, 8, ourdata, |
349 |
xmax, ymax, 8); |
350 |
if (ourras == NULL) |
351 |
goto fail; |
352 |
if (greyscale) |
353 |
biq(dither,maxcolors,1,ourmap); |
354 |
else |
355 |
ciq(dither,maxcolors,1,ourmap); |
356 |
if (init_rcolors(ourras, ourmap[0], ourmap[1], ourmap[2]) == 0) |
357 |
goto fail; |
358 |
} |
359 |
return; |
360 |
fail: |
361 |
quiterr("could not create raster image"); |
362 |
} |
363 |
|
364 |
|
365 |
getevent() /* process the next event */ |
366 |
{ |
367 |
union { |
368 |
XEvent u; |
369 |
XConfigureEvent c; |
370 |
XExposeEvent e; |
371 |
XButtonPressedEvent b; |
372 |
XKeyPressedEvent k; |
373 |
} e; |
374 |
|
375 |
XNextEvent(thedisplay, &e.u); |
376 |
switch (e.u.type) { |
377 |
case KeyPress: |
378 |
docom(&e.k); |
379 |
break; |
380 |
case ConfigureNotify: |
381 |
width = e.c.width; |
382 |
height = e.c.height; |
383 |
break; |
384 |
case MapNotify: |
385 |
map_rcolors(ourras, wind); |
386 |
if (fast) |
387 |
make_rpixmap(ourras); |
388 |
break; |
389 |
case UnmapNotify: |
390 |
unmap_rcolors(ourras); |
391 |
break; |
392 |
case Expose: |
393 |
redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
394 |
break; |
395 |
case ButtonPress: |
396 |
if (e.b.state & (ShiftMask|ControlMask)) |
397 |
moveimage(&e.b); |
398 |
else |
399 |
getbox(&e.b); |
400 |
break; |
401 |
} |
402 |
} |
403 |
|
404 |
|
405 |
docom(ekey) /* execute command */ |
406 |
XKeyPressedEvent *ekey; |
407 |
{ |
408 |
char buf[80]; |
409 |
COLOR cval; |
410 |
XColor cvx; |
411 |
int com, n; |
412 |
double comp; |
413 |
FLOAT hv[2]; |
414 |
FVECT rorg, rdir; |
415 |
|
416 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
417 |
if (n == 0) |
418 |
return(0); |
419 |
com = buf[0]; |
420 |
switch (com) { /* interpret command */ |
421 |
case 'q': |
422 |
case CTRL(D): /* quit */ |
423 |
quit(0); |
424 |
case '\n': |
425 |
case '\r': |
426 |
case 'l': |
427 |
case 'c': /* value */ |
428 |
if (avgbox(cval) == -1) |
429 |
return(-1); |
430 |
switch (com) { |
431 |
case '\n': |
432 |
case '\r': /* radiance */ |
433 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
434 |
break; |
435 |
case 'l': /* luminance */ |
436 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
437 |
break; |
438 |
case 'c': /* color */ |
439 |
comp = pow(2.0, (double)scale); |
440 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
441 |
colval(cval,RED)*comp, |
442 |
colval(cval,GRN)*comp, |
443 |
colval(cval,BLU)*comp); |
444 |
break; |
445 |
} |
446 |
XDrawImageString(thedisplay, wind, ourgc, |
447 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
448 |
return(0); |
449 |
case 'i': /* identify (contour) */ |
450 |
if (ourras->pixels == NULL) |
451 |
return(-1); |
452 |
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
453 |
n = ourras->pmap[n]; |
454 |
cvx.pixel = ourras->cdefs[n].pixel; |
455 |
cvx.red = random() & 65535; |
456 |
cvx.green = random() & 65535; |
457 |
cvx.blue = random() & 65535; |
458 |
cvx.flags = DoRed|DoGreen|DoBlue; |
459 |
XStoreColor(thedisplay, ourras->cmap, &cvx); |
460 |
return(0); |
461 |
case 'p': /* position */ |
462 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
463 |
sprintf(buf, "(%d,%d)", (int)(hv[0]*inpres.xr), |
464 |
(int)(hv[1]*inpres.yr)); |
465 |
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
466 |
buf, strlen(buf)); |
467 |
return(0); |
468 |
case 't': /* trace */ |
469 |
if (!gotview) { |
470 |
XBell(thedisplay, 0); |
471 |
return(-1); |
472 |
} |
473 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
474 |
if (viewray(rorg, rdir, &ourview, hv[0], hv[1]) < 0) |
475 |
return(-1); |
476 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
477 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
478 |
fflush(stdout); |
479 |
return(0); |
480 |
case '=': /* adjust exposure */ |
481 |
if (avgbox(cval) == -1) |
482 |
return(-1); |
483 |
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
484 |
if (n == 0) |
485 |
return(0); |
486 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
487 |
scale += n; |
488 |
sprintf(buf, "%+d", scale); |
489 |
XDrawImageString(thedisplay, wind, ourgc, |
490 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
491 |
XFlush(thedisplay); |
492 |
free(ourdata); |
493 |
free_raster(ourras); |
494 |
getras(); |
495 |
/* fall through */ |
496 |
case CTRL(R): /* redraw */ |
497 |
case CTRL(L): |
498 |
unmap_rcolors(ourras); |
499 |
XClearWindow(thedisplay, wind); |
500 |
map_rcolors(ourras, wind); |
501 |
if (fast) |
502 |
make_rpixmap(ourras); |
503 |
redraw(0, 0, width, height); |
504 |
return(0); |
505 |
case ' ': /* clear */ |
506 |
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
507 |
return(0); |
508 |
default: |
509 |
XBell(thedisplay, 0); |
510 |
return(-1); |
511 |
} |
512 |
} |
513 |
|
514 |
|
515 |
moveimage(ebut) /* shift the image */ |
516 |
XButtonPressedEvent *ebut; |
517 |
{ |
518 |
union { |
519 |
XEvent u; |
520 |
XButtonReleasedEvent b; |
521 |
XPointerMovedEvent m; |
522 |
} e; |
523 |
int mxo, myo; |
524 |
|
525 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
526 |
while (e.u.type == MotionNotify) { |
527 |
mxo = e.m.x; |
528 |
myo = e.m.y; |
529 |
revline(ebut->x, ebut->y, mxo, myo); |
530 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
531 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
532 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
533 |
revline(ebut->x, ebut->y, mxo, myo); |
534 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
535 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
536 |
} |
537 |
xoff += e.b.x - ebut->x; |
538 |
yoff += e.b.y - ebut->y; |
539 |
XClearWindow(thedisplay, wind); |
540 |
redraw(0, 0, width, height); |
541 |
} |
542 |
|
543 |
|
544 |
getbox(ebut) /* get new box */ |
545 |
XButtonPressedEvent *ebut; |
546 |
{ |
547 |
union { |
548 |
XEvent u; |
549 |
XButtonReleasedEvent b; |
550 |
XPointerMovedEvent m; |
551 |
} e; |
552 |
|
553 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
554 |
while (e.u.type == MotionNotify) { |
555 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
556 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
557 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
558 |
} |
559 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
560 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
561 |
if (box.xmin > ebut->x) { |
562 |
box.xsiz = box.xmin - ebut->x + 1; |
563 |
box.xmin = ebut->x; |
564 |
} else { |
565 |
box.xsiz = ebut->x - box.xmin + 1; |
566 |
} |
567 |
if (box.ymin > ebut->y) { |
568 |
box.ysiz = box.ymin - ebut->y + 1; |
569 |
box.ymin = ebut->y; |
570 |
} else { |
571 |
box.ysiz = ebut->y - box.ymin + 1; |
572 |
} |
573 |
} |
574 |
|
575 |
|
576 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
577 |
int x0, y0, x1, y1; |
578 |
{ |
579 |
revline(x0, y0, x1, y0); |
580 |
revline(x0, y1, x1, y1); |
581 |
revline(x0, y0, x0, y1); |
582 |
revline(x1, y0, x1, y1); |
583 |
} |
584 |
|
585 |
|
586 |
avgbox(clr) /* average color over current box */ |
587 |
COLOR clr; |
588 |
{ |
589 |
static COLOR lc; |
590 |
static int ll, lr, lt, lb; |
591 |
int left, right, top, bottom; |
592 |
int y; |
593 |
double d; |
594 |
COLOR ctmp; |
595 |
register int x; |
596 |
|
597 |
setcolor(clr, 0.0, 0.0, 0.0); |
598 |
left = box.xmin - xoff; |
599 |
right = left + box.xsiz; |
600 |
if (left < 0) |
601 |
left = 0; |
602 |
if (right > xmax) |
603 |
right = xmax; |
604 |
if (left >= right) |
605 |
return(-1); |
606 |
top = box.ymin - yoff; |
607 |
bottom = top + box.ysiz; |
608 |
if (top < 0) |
609 |
top = 0; |
610 |
if (bottom > ymax) |
611 |
bottom = ymax; |
612 |
if (top >= bottom) |
613 |
return(-1); |
614 |
if (left == ll && right == lr && top == lt && bottom == lb) { |
615 |
copycolor(clr, lc); |
616 |
return; |
617 |
} |
618 |
for (y = top; y < bottom; y++) { |
619 |
if (getscan(y) == -1) |
620 |
return(-1); |
621 |
for (x = left; x < right; x++) { |
622 |
colr_color(ctmp, scanline[x]); |
623 |
addcolor(clr, ctmp); |
624 |
} |
625 |
} |
626 |
d = 1.0/((right-left)*(bottom-top)); |
627 |
scalecolor(clr, d); |
628 |
ll = left; lr = right; lt = top; lb = bottom; |
629 |
copycolor(lc, clr); |
630 |
return(0); |
631 |
} |
632 |
|
633 |
|
634 |
getmono() /* get monochrome data */ |
635 |
{ |
636 |
register unsigned char *dp; |
637 |
register int x, err; |
638 |
int y, errp; |
639 |
short *cerr; |
640 |
|
641 |
if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
642 |
quiterr("out of memory in getmono"); |
643 |
dp = ourdata - 1; |
644 |
for (y = 0; y < ymax; y++) { |
645 |
if (getscan(y) < 0) |
646 |
quiterr("seek error in getmono"); |
647 |
normcolrs(scanline, xmax, scale); |
648 |
add2icon(y, scanline); |
649 |
err = 0; |
650 |
for (x = 0; x < xmax; x++) { |
651 |
if (!(x&7)) |
652 |
*++dp = 0; |
653 |
errp = err; |
654 |
err += normbright(scanline[x]) + cerr[x]; |
655 |
if (err > 127) |
656 |
err -= 255; |
657 |
else |
658 |
*dp |= 1<<(7-(x&07)); |
659 |
err /= 3; |
660 |
cerr[x] = err + errp; |
661 |
} |
662 |
} |
663 |
free((char *)cerr); |
664 |
} |
665 |
|
666 |
|
667 |
add2icon(y, scan) /* add a scanline to our icon data */ |
668 |
int y; |
669 |
COLR *scan; |
670 |
{ |
671 |
static short cerr[ICONSIZ]; |
672 |
static int ynext; |
673 |
static char *dp; |
674 |
register int err; |
675 |
register int x, ti; |
676 |
int errp; |
677 |
|
678 |
if (iconheight == 0) { /* initialize */ |
679 |
if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
680 |
iconwidth = xmax; |
681 |
iconheight = ymax; |
682 |
} else if (xmax > ymax) { |
683 |
iconwidth = ICONSIZ; |
684 |
iconheight = ICONSIZ*ymax/xmax; |
685 |
if (iconheight < 1) |
686 |
iconheight = 1; |
687 |
} else { |
688 |
iconwidth = ICONSIZ*xmax/ymax; |
689 |
if (iconwidth < 1) |
690 |
iconwidth = 1; |
691 |
iconheight = ICONSIZ; |
692 |
} |
693 |
ynext = 0; |
694 |
dp = icondata - 1; |
695 |
} |
696 |
if (y < ynext*ymax/iconheight) /* skip this one */ |
697 |
return; |
698 |
err = 0; |
699 |
for (x = 0; x < iconwidth; x++) { |
700 |
if (!(x&7)) |
701 |
*++dp = 0; |
702 |
errp = err; |
703 |
ti = x*xmax/iconwidth; |
704 |
err += normbright(scan[ti]) + cerr[x]; |
705 |
if (err > 127) |
706 |
err -= 255; |
707 |
else |
708 |
*dp |= 1<<(x&07); |
709 |
err /= 3; |
710 |
cerr[x] = err + errp; |
711 |
} |
712 |
ynext++; |
713 |
} |
714 |
|
715 |
|
716 |
getfull() /* get full (24-bit) data */ |
717 |
{ |
718 |
int y; |
719 |
register unsigned char *dp; |
720 |
register int x; |
721 |
/* set gamma correction */ |
722 |
setcolrgam(gamcor); |
723 |
/* read and convert file */ |
724 |
dp = ourdata; |
725 |
for (y = 0; y < ymax; y++) { |
726 |
if (getscan(y) < 0) |
727 |
quiterr("seek error in getfull"); |
728 |
if (scale) |
729 |
shiftcolrs(scanline, xmax, scale); |
730 |
colrs_gambs(scanline, xmax); |
731 |
add2icon(y, scanline); |
732 |
for (x = 0; x < xmax; x++) { |
733 |
*dp++ = scanline[x][RED]; |
734 |
*dp++ = scanline[x][GRN]; |
735 |
*dp++ = scanline[x][BLU]; |
736 |
} |
737 |
} |
738 |
} |
739 |
|
740 |
|
741 |
scale_rcolors(xr, sf) /* scale color map */ |
742 |
register XRASTER *xr; |
743 |
double sf; |
744 |
{ |
745 |
register int i; |
746 |
long maxv; |
747 |
|
748 |
if (xr->pixels == NULL) |
749 |
return; |
750 |
|
751 |
sf = pow(sf, 1.0/gamcor); |
752 |
maxv = 65535/sf; |
753 |
|
754 |
for (i = xr->ncolors; i--; ) { |
755 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
756 |
65535 : |
757 |
xr->cdefs[i].red * sf; |
758 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
759 |
65535 : |
760 |
xr->cdefs[i].green * sf; |
761 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
762 |
65535 : |
763 |
xr->cdefs[i].blue * sf; |
764 |
} |
765 |
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
766 |
} |
767 |
|
768 |
|
769 |
getscan(y) |
770 |
int y; |
771 |
{ |
772 |
if (y != cury) { |
773 |
if (scanpos == NULL || scanpos[y] == -1) |
774 |
return(-1); |
775 |
if (fseek(fin, scanpos[y], 0) == -1) |
776 |
quiterr("fseek error"); |
777 |
cury = y; |
778 |
} else if (scanpos != NULL) |
779 |
scanpos[y] = ftell(fin); |
780 |
|
781 |
if (freadcolrs(scanline, xmax, fin) < 0) |
782 |
quiterr("read error"); |
783 |
|
784 |
cury++; |
785 |
return(0); |
786 |
} |
787 |
|
788 |
|
789 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
790 |
int y; |
791 |
register rgbpixel *l3; |
792 |
{ |
793 |
register int i; |
794 |
/* read scanline */ |
795 |
if (getscan(y) < 0) |
796 |
quiterr("cannot seek for picreadline"); |
797 |
/* convert scanline */ |
798 |
normcolrs(scanline, xmax, scale); |
799 |
add2icon(y, scanline); |
800 |
for (i = 0; i < xmax; i++) { |
801 |
l3[i].r = scanline[i][RED]; |
802 |
l3[i].g = scanline[i][GRN]; |
803 |
l3[i].b = scanline[i][BLU]; |
804 |
} |
805 |
} |
806 |
|
807 |
|
808 |
picwriteline(y, l) /* add 8-bit scanline to image */ |
809 |
int y; |
810 |
pixel *l; |
811 |
{ |
812 |
bcopy((char *)l, (char *)ourdata+y*xmax, xmax); |
813 |
} |
814 |
|
815 |
|
816 |
picreadcm(map) /* do gamma correction */ |
817 |
colormap map; |
818 |
{ |
819 |
extern double pow(); |
820 |
register int i, val; |
821 |
|
822 |
for (i = 0; i < 256; i++) { |
823 |
val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
824 |
map[0][i] = map[1][i] = map[2][i] = val; |
825 |
} |
826 |
} |
827 |
|
828 |
|
829 |
picwritecm(map) /* handled elsewhere */ |
830 |
colormap map; |
831 |
{ |
832 |
#ifdef DEBUG |
833 |
register int i; |
834 |
|
835 |
for (i = 0; i < 256; i++) |
836 |
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
837 |
#endif |
838 |
} |