1 |
/* Copyright (c) 1992 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 "x11raster.h" |
31 |
#include "random.h" |
32 |
#include "resolu.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 ICONSIZ (8*10) /* maximum icon dimension (even 8) */ |
41 |
|
42 |
#define ourscreen DefaultScreen(thedisplay) |
43 |
#define ourroot RootWindow(thedisplay,ourscreen) |
44 |
|
45 |
#define revline(x0,y0,x1,y1) XDrawLine(thedisplay,wind,revgc,x0,y0,x1,y1) |
46 |
|
47 |
#define redraw(x,y,w,h) patch_raster(wind,(x)-xoff,(y)-yoff,x,y,w,h,ourras) |
48 |
|
49 |
double gamcor = 2.2; /* gamma correction */ |
50 |
|
51 |
int dither = 1; /* dither colors? */ |
52 |
int fast = 0; /* keep picture in Pixmap? */ |
53 |
|
54 |
char *dispname = NULL; /* our display name */ |
55 |
|
56 |
Window wind = 0; /* our output window */ |
57 |
unsigned long ourblack=0, ourwhite=1; /* black and white for this visual */ |
58 |
Font fontid; /* our font */ |
59 |
|
60 |
int maxcolors = 0; /* maximum colors */ |
61 |
int greyscale = 0; /* in grey */ |
62 |
|
63 |
int scale = 0; /* scalefactor; power of two */ |
64 |
|
65 |
int xoff = 0; /* x image offset */ |
66 |
int yoff = 0; /* y image offset */ |
67 |
|
68 |
VIEW ourview = STDVIEW; /* image view parameters */ |
69 |
int gotview = 0; /* got parameters from file */ |
70 |
|
71 |
COLR *scanline; /* scan line buffer */ |
72 |
|
73 |
RESOLU inpres; /* input resolution and ordering */ |
74 |
int xmax, ymax; /* picture dimensions */ |
75 |
int width, height; /* window size */ |
76 |
char *fname = NULL; /* input file name */ |
77 |
FILE *fin = stdin; /* input file */ |
78 |
long *scanpos = NULL; /* scan line positions in file */ |
79 |
int cury = 0; /* current scan location */ |
80 |
|
81 |
double exposure = 1.0; /* exposure compensation used */ |
82 |
|
83 |
int wrongformat = 0; /* input in another format? */ |
84 |
|
85 |
GC ourgc; /* standard graphics context */ |
86 |
GC revgc; /* graphics context with GXinvert */ |
87 |
|
88 |
int *ourrank; /* our visual class ranking */ |
89 |
XVisualInfo ourvis; /* our visual */ |
90 |
XRASTER *ourras; /* our stored image */ |
91 |
unsigned char *ourdata; /* our image data */ |
92 |
|
93 |
struct { |
94 |
int xmin, ymin, xsiz, ysiz; |
95 |
} box = {0, 0, 0, 0}; /* current box */ |
96 |
|
97 |
char *geometry = NULL; /* geometry specification */ |
98 |
|
99 |
char icondata[ICONSIZ*ICONSIZ/8]; /* icon bitmap data */ |
100 |
int iconwidth = 0, iconheight = 0; |
101 |
|
102 |
char *progname; |
103 |
|
104 |
char errmsg[128]; |
105 |
|
106 |
extern BYTE clrtab[256][3]; /* global color map */ |
107 |
|
108 |
extern long ftell(); |
109 |
|
110 |
extern char *malloc(), *calloc(); |
111 |
|
112 |
Display *thedisplay; |
113 |
|
114 |
|
115 |
main(argc, argv) |
116 |
int argc; |
117 |
char *argv[]; |
118 |
{ |
119 |
extern char *getenv(); |
120 |
char *gv; |
121 |
int headline(); |
122 |
int i; |
123 |
|
124 |
progname = argv[0]; |
125 |
if ((gv = getenv("GAMMA")) != NULL) |
126 |
gamcor = atof(gv); |
127 |
|
128 |
for (i = 1; i < argc; i++) |
129 |
if (argv[i][0] == '-') |
130 |
switch (argv[i][1]) { |
131 |
case 'c': |
132 |
maxcolors = atoi(argv[++i]); |
133 |
break; |
134 |
case 'b': |
135 |
greyscale = !greyscale; |
136 |
break; |
137 |
case 'm': |
138 |
maxcolors = 2; |
139 |
break; |
140 |
case 'd': |
141 |
if (argv[i][2] == 'i') |
142 |
dispname = argv[++i]; |
143 |
else |
144 |
dither = !dither; |
145 |
break; |
146 |
case 'f': |
147 |
fast = !fast; |
148 |
break; |
149 |
case 'e': |
150 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
151 |
goto userr; |
152 |
scale = atoi(argv[++i]); |
153 |
break; |
154 |
case 'g': |
155 |
if (argv[i][2] == 'e') |
156 |
geometry = argv[++i]; |
157 |
else |
158 |
gamcor = atof(argv[++i]); |
159 |
break; |
160 |
default: |
161 |
goto userr; |
162 |
} |
163 |
else if (argv[i][0] == '=') |
164 |
geometry = argv[i]; |
165 |
else |
166 |
break; |
167 |
|
168 |
if (i == argc-1) { |
169 |
fname = argv[i]; |
170 |
fin = fopen(fname, "r"); |
171 |
if (fin == NULL) { |
172 |
sprintf(errmsg, "cannot open file \"%s\"", fname); |
173 |
quiterr(errmsg); |
174 |
} |
175 |
} else if (i != argc) |
176 |
goto userr; |
177 |
/* get header */ |
178 |
getheader(fin, headline, NULL); |
179 |
/* get picture dimensions */ |
180 |
if (wrongformat || !fgetsresolu(&inpres, fin)) |
181 |
quiterr("bad picture format"); |
182 |
xmax = scanlen(&inpres); |
183 |
ymax = numscans(&inpres); |
184 |
/* set view parameters */ |
185 |
if (gotview && setview(&ourview) != NULL) |
186 |
gotview = 0; |
187 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
188 |
quiterr("out of memory"); |
189 |
|
190 |
init(); /* get file and open window */ |
191 |
|
192 |
for ( ; ; ) |
193 |
getevent(); /* main loop */ |
194 |
userr: |
195 |
fprintf(stderr, |
196 |
"Usage: %s [-display disp][-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
197 |
progname); |
198 |
quit(1); |
199 |
} |
200 |
|
201 |
|
202 |
headline(s) /* get relevant info from header */ |
203 |
char *s; |
204 |
{ |
205 |
char fmt[32]; |
206 |
|
207 |
if (isexpos(s)) |
208 |
exposure *= exposval(s); |
209 |
else if (isformat(s)) { |
210 |
formatval(fmt, s); |
211 |
wrongformat = strcmp(fmt, COLRFMT); |
212 |
} else if (isview(s) && sscanview(&ourview, s) > 0) |
213 |
gotview++; |
214 |
} |
215 |
|
216 |
|
217 |
init() /* get data and open window */ |
218 |
{ |
219 |
XWMHints ourxwmhints; |
220 |
XSetWindowAttributes ourwinattr; |
221 |
XSizeHints oursizhints; |
222 |
register int i; |
223 |
|
224 |
if (fname != NULL) { |
225 |
scanpos = (long *)malloc(ymax*sizeof(long)); |
226 |
if (scanpos == NULL) |
227 |
goto memerr; |
228 |
for (i = 0; i < ymax; i++) |
229 |
scanpos[i] = -1; |
230 |
} |
231 |
if ((thedisplay = XOpenDisplay(dispname)) == NULL) |
232 |
quiterr("cannot open display"); |
233 |
/* get best visual for default screen */ |
234 |
getbestvis(); |
235 |
/* store image */ |
236 |
getras(); |
237 |
/* open window */ |
238 |
ourwinattr.border_pixel = ourblack; |
239 |
ourwinattr.background_pixel = ourwhite; |
240 |
ourwinattr.colormap = XCreateColormap(thedisplay, ourroot, |
241 |
ourvis.visual, AllocNone); |
242 |
wind = XCreateWindow(thedisplay, ourroot, 0, 0, xmax, ymax, BORWIDTH, |
243 |
ourvis.depth, InputOutput, ourvis.visual, |
244 |
CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr); |
245 |
if (wind == 0) |
246 |
quiterr("cannot create window"); |
247 |
XFreeColormap(thedisplay, ourwinattr.colormap); |
248 |
width = xmax; |
249 |
height = ymax; |
250 |
ourgc = XCreateGC(thedisplay, wind, 0, 0); |
251 |
XSetState(thedisplay, ourgc, ourblack, ourwhite, GXcopy, AllPlanes); |
252 |
revgc = XCreateGC(thedisplay, wind, 0, 0); |
253 |
XSetFunction(thedisplay, revgc, GXinvert); |
254 |
fontid = XLoadFont(thedisplay, FONTNAME); |
255 |
if (fontid == 0) |
256 |
quiterr("cannot get font"); |
257 |
XSetFont(thedisplay, ourgc, fontid); |
258 |
XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
259 |
XC_diamond_cross)); |
260 |
XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
261 |
if (geometry != NULL) { |
262 |
bzero((char *)&oursizhints, sizeof(oursizhints)); |
263 |
i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
264 |
(unsigned *)&oursizhints.width, |
265 |
(unsigned *)&oursizhints.height); |
266 |
if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue)) |
267 |
oursizhints.flags |= USSize; |
268 |
else { |
269 |
oursizhints.width = xmax; |
270 |
oursizhints.height = ymax; |
271 |
oursizhints.flags |= PSize; |
272 |
} |
273 |
if ((i&(XValue|YValue)) == (XValue|YValue)) { |
274 |
oursizhints.flags |= USPosition; |
275 |
if (i & XNegative) |
276 |
oursizhints.x += DisplayWidth(thedisplay, |
277 |
ourscreen)-1-oursizhints.width-2*BORWIDTH; |
278 |
if (i & YNegative) |
279 |
oursizhints.y += DisplayHeight(thedisplay, |
280 |
ourscreen)-1-oursizhints.height-2*BORWIDTH; |
281 |
} |
282 |
XSetNormalHints(thedisplay, wind, &oursizhints); |
283 |
} |
284 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
285 |
ourxwmhints.input = True; |
286 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(thedisplay, |
287 |
wind, icondata, iconwidth, iconheight); |
288 |
XSetWMHints(thedisplay, wind, &ourxwmhints); |
289 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask |
290 |
|ButtonMotionMask|StructureNotifyMask |
291 |
|KeyPressMask|ExposureMask); |
292 |
XMapWindow(thedisplay, wind); |
293 |
return; |
294 |
memerr: |
295 |
quiterr("out of memory"); |
296 |
} /* end of init */ |
297 |
|
298 |
|
299 |
quiterr(err) /* print message and exit */ |
300 |
char *err; |
301 |
{ |
302 |
if (err != NULL) { |
303 |
fprintf(stderr, "%s: %s\n", progname, err); |
304 |
exit(1); |
305 |
} |
306 |
exit(0); |
307 |
} |
308 |
|
309 |
|
310 |
static int |
311 |
viscmp(v1,v2) /* compare visual to see which is better, descending */ |
312 |
register XVisualInfo *v1, *v2; |
313 |
{ |
314 |
int bad1 = 0, bad2 = 0; |
315 |
register int *rp; |
316 |
|
317 |
if (v1->class == v2->class) { |
318 |
if (v1->class == TrueColor || v1->class == DirectColor) { |
319 |
/* prefer 24-bit to 32-bit */ |
320 |
if (v1->depth == 24 && v2->depth == 32) |
321 |
return(-1); |
322 |
if (v1->depth == 32 && v2->depth == 24) |
323 |
return(1); |
324 |
return(0); |
325 |
} |
326 |
/* don't be too greedy */ |
327 |
if (maxcolors <= 1<<v1->depth && maxcolors <= 1<<v2->depth) |
328 |
return(v1->depth - v2->depth); |
329 |
return(v2->depth - v1->depth); |
330 |
} |
331 |
/* prefer Pseudo when < 24-bit */ |
332 |
if ((v1->class == TrueColor || v1->class == DirectColor) && |
333 |
v1->depth < 24) |
334 |
bad1 = 1; |
335 |
if ((v2->class == TrueColor || v2->class == DirectColor) && |
336 |
v2->depth < 24) |
337 |
bad2 = -1; |
338 |
if (bad1 | bad2) |
339 |
return(bad1+bad2); |
340 |
/* otherwise, use class ranking */ |
341 |
for (rp = ourrank; *rp != -1; rp++) { |
342 |
if (v1->class == *rp) |
343 |
return(-1); |
344 |
if (v2->class == *rp) |
345 |
return(1); |
346 |
} |
347 |
return(0); |
348 |
} |
349 |
|
350 |
|
351 |
getbestvis() /* get the best visual for this screen */ |
352 |
{ |
353 |
#ifdef DEBUG |
354 |
static char vistype[][12] = { |
355 |
"StaticGray", |
356 |
"GrayScale", |
357 |
"StaticColor", |
358 |
"PseudoColor", |
359 |
"TrueColor", |
360 |
"DirectColor" |
361 |
}; |
362 |
#endif |
363 |
static int rankings[3][6] = { |
364 |
{TrueColor,DirectColor,PseudoColor,GrayScale,StaticGray,-1}, |
365 |
{PseudoColor,GrayScale,StaticGray,-1}, |
366 |
{PseudoColor,GrayScale,StaticGray,-1} |
367 |
}; |
368 |
XVisualInfo *xvi; |
369 |
int vismatched; |
370 |
register int i, j; |
371 |
|
372 |
if (greyscale) { |
373 |
ourrank = rankings[2]; |
374 |
if (maxcolors < 2) maxcolors = 256; |
375 |
} else if (maxcolors >= 2 && maxcolors <= 256) |
376 |
ourrank = rankings[1]; |
377 |
else { |
378 |
ourrank = rankings[0]; |
379 |
maxcolors = 256; |
380 |
} |
381 |
/* find best visual */ |
382 |
ourvis.screen = ourscreen; |
383 |
xvi = XGetVisualInfo(thedisplay,VisualScreenMask,&ourvis,&vismatched); |
384 |
if (xvi == NULL) |
385 |
quiterr("no visuals for this screen!"); |
386 |
#ifdef DEBUG |
387 |
fprintf(stderr, "Supported visuals:\n"); |
388 |
for (i = 0; i < vismatched; i++) |
389 |
fprintf(stderr, "\ttype %s, depth %d\n", |
390 |
vistype[xvi[i].class], xvi[i].depth); |
391 |
#endif |
392 |
for (i = 0, j = 1; j < vismatched; j++) |
393 |
if (viscmp(&xvi[i],&xvi[j]) > 0) |
394 |
i = j; |
395 |
/* compare to least acceptable */ |
396 |
for (j = 0; ourrank[j++] != -1; ) |
397 |
; |
398 |
ourvis.class = ourrank[--j]; |
399 |
ourvis.depth = 1; |
400 |
if (viscmp(&xvi[i],&ourvis) > 0) |
401 |
quiterr("inadequate visuals on this screen"); |
402 |
/* OK, we'll use it */ |
403 |
copystruct(&ourvis, &xvi[i]); |
404 |
#ifdef DEBUG |
405 |
fprintf(stderr, "Selected visual type %s, depth %d\n", |
406 |
vistype[ourvis.class], ourvis.depth); |
407 |
#endif |
408 |
/* make appropriate adjustments */ |
409 |
if (ourvis.class == GrayScale || ourvis.class == StaticGray) |
410 |
greyscale = 1; |
411 |
if (ourvis.depth <= 8 && ourvis.colormap_size < maxcolors) |
412 |
maxcolors = ourvis.colormap_size; |
413 |
if (ourvis.class == StaticGray) { |
414 |
ourblack = 0; |
415 |
ourwhite = 255; |
416 |
} else if (ourvis.class == PseudoColor) { |
417 |
ourblack = BlackPixel(thedisplay,ourscreen); |
418 |
ourwhite = WhitePixel(thedisplay,ourscreen); |
419 |
if ((ourblack|ourwhite) & ~255L) { |
420 |
ourblack = 0; |
421 |
ourwhite = 1; |
422 |
} |
423 |
if (maxcolors > 4) |
424 |
maxcolors -= 2; |
425 |
} else { |
426 |
ourblack = 0; |
427 |
ourwhite = ourvis.red_mask|ourvis.green_mask|ourvis.blue_mask; |
428 |
} |
429 |
XFree((char *)xvi); |
430 |
} |
431 |
|
432 |
|
433 |
getras() /* get raster file */ |
434 |
{ |
435 |
XVisualInfo vinfo; |
436 |
|
437 |
if (maxcolors <= 2) { /* monochrome */ |
438 |
ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
439 |
if (ourdata == NULL) |
440 |
goto fail; |
441 |
ourras = make_raster(thedisplay, &ourvis, 1, ourdata, |
442 |
xmax, ymax, 8); |
443 |
if (ourras == NULL) |
444 |
goto fail; |
445 |
getmono(); |
446 |
} else if (ourvis.class == TrueColor | ourvis.class == DirectColor) { |
447 |
ourdata = (unsigned char *)malloc(4*xmax*ymax); |
448 |
if (ourdata == NULL) |
449 |
goto fail; |
450 |
ourras = make_raster(thedisplay, &ourvis, 32, |
451 |
ourdata, xmax, ymax, 32); |
452 |
if (ourras == NULL) |
453 |
goto fail; |
454 |
getfull(); |
455 |
} else { |
456 |
ourdata = (unsigned char *)malloc(xmax*ymax); |
457 |
if (ourdata == NULL) |
458 |
goto fail; |
459 |
ourras = make_raster(thedisplay, &ourvis, 8, ourdata, |
460 |
xmax, ymax, 8); |
461 |
if (ourras == NULL) |
462 |
goto fail; |
463 |
if (greyscale | ourvis.class == StaticGray) |
464 |
getgrey(); |
465 |
else |
466 |
getmapped(); |
467 |
if (ourvis.class != StaticGray && !init_rcolors(ourras,clrtab)) |
468 |
goto fail; |
469 |
} |
470 |
return; |
471 |
fail: |
472 |
quiterr("could not create raster image"); |
473 |
} |
474 |
|
475 |
|
476 |
getevent() /* process the next event */ |
477 |
{ |
478 |
union { |
479 |
XEvent u; |
480 |
XConfigureEvent c; |
481 |
XExposeEvent e; |
482 |
XButtonPressedEvent b; |
483 |
XKeyPressedEvent k; |
484 |
} e; |
485 |
|
486 |
XNextEvent(thedisplay, &e.u); |
487 |
switch (e.u.type) { |
488 |
case KeyPress: |
489 |
docom(&e.k); |
490 |
break; |
491 |
case ConfigureNotify: |
492 |
width = e.c.width; |
493 |
height = e.c.height; |
494 |
break; |
495 |
case MapNotify: |
496 |
map_rcolors(ourras, wind); |
497 |
if (fast) |
498 |
make_rpixmap(ourras, wind); |
499 |
break; |
500 |
case UnmapNotify: |
501 |
if (!fast) |
502 |
unmap_rcolors(ourras); |
503 |
break; |
504 |
case Expose: |
505 |
redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
506 |
break; |
507 |
case ButtonPress: |
508 |
if (e.b.state & (ShiftMask|ControlMask)) |
509 |
moveimage(&e.b); |
510 |
else |
511 |
getbox(&e.b); |
512 |
break; |
513 |
} |
514 |
} |
515 |
|
516 |
|
517 |
docom(ekey) /* execute command */ |
518 |
XKeyPressedEvent *ekey; |
519 |
{ |
520 |
char buf[80]; |
521 |
COLOR cval; |
522 |
XColor cvx; |
523 |
int com, n; |
524 |
double comp; |
525 |
FLOAT hv[2]; |
526 |
FVECT rorg, rdir; |
527 |
|
528 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
529 |
if (n == 0) |
530 |
return(0); |
531 |
com = buf[0]; |
532 |
switch (com) { /* interpret command */ |
533 |
case 'q': |
534 |
case CTRL('D'): /* quit */ |
535 |
quit(0); |
536 |
case '\n': |
537 |
case '\r': |
538 |
case 'l': |
539 |
case 'c': /* value */ |
540 |
if (avgbox(cval) == -1) |
541 |
return(-1); |
542 |
switch (com) { |
543 |
case '\n': |
544 |
case '\r': /* radiance */ |
545 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
546 |
break; |
547 |
case 'l': /* luminance */ |
548 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
549 |
break; |
550 |
case 'c': /* color */ |
551 |
comp = pow(2.0, (double)scale); |
552 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
553 |
colval(cval,RED)*comp, |
554 |
colval(cval,GRN)*comp, |
555 |
colval(cval,BLU)*comp); |
556 |
break; |
557 |
} |
558 |
XDrawImageString(thedisplay, wind, ourgc, |
559 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
560 |
return(0); |
561 |
case 'i': /* identify (contour) */ |
562 |
if (ourras->pixels == NULL) |
563 |
return(-1); |
564 |
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
565 |
n = ourras->pmap[n]; |
566 |
cvx.pixel = ourras->cdefs[n].pixel; |
567 |
cvx.red = random() & 65535; |
568 |
cvx.green = random() & 65535; |
569 |
cvx.blue = random() & 65535; |
570 |
cvx.flags = DoRed|DoGreen|DoBlue; |
571 |
XStoreColor(thedisplay, ourras->cmap, &cvx); |
572 |
return(0); |
573 |
case 'p': /* position */ |
574 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
575 |
sprintf(buf, "(%d,%d)", (int)(hv[0]*inpres.xr), |
576 |
(int)(hv[1]*inpres.yr)); |
577 |
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
578 |
buf, strlen(buf)); |
579 |
return(0); |
580 |
case 't': /* trace */ |
581 |
if (!gotview) { |
582 |
XBell(thedisplay, 0); |
583 |
return(-1); |
584 |
} |
585 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
586 |
if (viewray(rorg, rdir, &ourview, hv[0], hv[1]) < 0) |
587 |
return(-1); |
588 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
589 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
590 |
fflush(stdout); |
591 |
return(0); |
592 |
case '=': /* adjust exposure */ |
593 |
if (avgbox(cval) == -1) |
594 |
return(-1); |
595 |
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
596 |
if (n == 0) |
597 |
return(0); |
598 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
599 |
scale += n; |
600 |
sprintf(buf, "%+d", scale); |
601 |
XDrawImageString(thedisplay, wind, ourgc, |
602 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
603 |
XFlush(thedisplay); |
604 |
free(ourdata); |
605 |
free_raster(ourras); |
606 |
getras(); |
607 |
/* fall through */ |
608 |
case CTRL('R'): /* redraw */ |
609 |
case CTRL('L'): |
610 |
unmap_rcolors(ourras); |
611 |
XClearWindow(thedisplay, wind); |
612 |
map_rcolors(ourras, wind); |
613 |
if (fast) |
614 |
make_rpixmap(ourras, wind); |
615 |
redraw(0, 0, width, height); |
616 |
return(0); |
617 |
case ' ': /* clear */ |
618 |
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
619 |
return(0); |
620 |
default: |
621 |
XBell(thedisplay, 0); |
622 |
return(-1); |
623 |
} |
624 |
} |
625 |
|
626 |
|
627 |
moveimage(ebut) /* shift the image */ |
628 |
XButtonPressedEvent *ebut; |
629 |
{ |
630 |
union { |
631 |
XEvent u; |
632 |
XButtonReleasedEvent b; |
633 |
XPointerMovedEvent m; |
634 |
} e; |
635 |
int mxo, myo; |
636 |
|
637 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
638 |
while (e.u.type == MotionNotify) { |
639 |
mxo = e.m.x; |
640 |
myo = e.m.y; |
641 |
revline(ebut->x, ebut->y, mxo, myo); |
642 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
643 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
644 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
645 |
revline(ebut->x, ebut->y, mxo, myo); |
646 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
647 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
648 |
} |
649 |
xoff += e.b.x - ebut->x; |
650 |
yoff += e.b.y - ebut->y; |
651 |
XClearWindow(thedisplay, wind); |
652 |
redraw(0, 0, width, height); |
653 |
} |
654 |
|
655 |
|
656 |
getbox(ebut) /* get new box */ |
657 |
XButtonPressedEvent *ebut; |
658 |
{ |
659 |
union { |
660 |
XEvent u; |
661 |
XButtonReleasedEvent b; |
662 |
XPointerMovedEvent m; |
663 |
} e; |
664 |
|
665 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
666 |
while (e.u.type == MotionNotify) { |
667 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
668 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
669 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
670 |
} |
671 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
672 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
673 |
if (box.xmin > ebut->x) { |
674 |
box.xsiz = box.xmin - ebut->x + 1; |
675 |
box.xmin = ebut->x; |
676 |
} else { |
677 |
box.xsiz = ebut->x - box.xmin + 1; |
678 |
} |
679 |
if (box.ymin > ebut->y) { |
680 |
box.ysiz = box.ymin - ebut->y + 1; |
681 |
box.ymin = ebut->y; |
682 |
} else { |
683 |
box.ysiz = ebut->y - box.ymin + 1; |
684 |
} |
685 |
} |
686 |
|
687 |
|
688 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
689 |
int x0, y0, x1, y1; |
690 |
{ |
691 |
revline(x0, y0, x1, y0); |
692 |
revline(x0, y1, x1, y1); |
693 |
revline(x0, y0, x0, y1); |
694 |
revline(x1, y0, x1, y1); |
695 |
} |
696 |
|
697 |
|
698 |
avgbox(clr) /* average color over current box */ |
699 |
COLOR clr; |
700 |
{ |
701 |
static COLOR lc; |
702 |
static int ll, lr, lt, lb; |
703 |
int left, right, top, bottom; |
704 |
int y; |
705 |
double d; |
706 |
COLOR ctmp; |
707 |
register int x; |
708 |
|
709 |
setcolor(clr, 0.0, 0.0, 0.0); |
710 |
left = box.xmin - xoff; |
711 |
right = left + box.xsiz; |
712 |
if (left < 0) |
713 |
left = 0; |
714 |
if (right > xmax) |
715 |
right = xmax; |
716 |
if (left >= right) |
717 |
return(-1); |
718 |
top = box.ymin - yoff; |
719 |
bottom = top + box.ysiz; |
720 |
if (top < 0) |
721 |
top = 0; |
722 |
if (bottom > ymax) |
723 |
bottom = ymax; |
724 |
if (top >= bottom) |
725 |
return(-1); |
726 |
if (left == ll && right == lr && top == lt && bottom == lb) { |
727 |
copycolor(clr, lc); |
728 |
return(0); |
729 |
} |
730 |
for (y = top; y < bottom; y++) { |
731 |
if (getscan(y) == -1) |
732 |
return(-1); |
733 |
for (x = left; x < right; x++) { |
734 |
colr_color(ctmp, scanline[x]); |
735 |
addcolor(clr, ctmp); |
736 |
} |
737 |
} |
738 |
d = 1.0/((right-left)*(bottom-top)); |
739 |
scalecolor(clr, d); |
740 |
ll = left; lr = right; lt = top; lb = bottom; |
741 |
copycolor(lc, clr); |
742 |
return(0); |
743 |
} |
744 |
|
745 |
|
746 |
getmono() /* get monochrome data */ |
747 |
{ |
748 |
register unsigned char *dp; |
749 |
register int x, err; |
750 |
int y, errp; |
751 |
short *cerr; |
752 |
|
753 |
if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
754 |
quiterr("out of memory in getmono"); |
755 |
dp = ourdata - 1; |
756 |
for (y = 0; y < ymax; y++) { |
757 |
getscan(y); |
758 |
normcolrs(scanline, xmax, scale); |
759 |
add2icon(y, scanline); |
760 |
err = 0; |
761 |
for (x = 0; x < xmax; x++) { |
762 |
if (!(x&7)) |
763 |
*++dp = 0; |
764 |
errp = err; |
765 |
err += normbright(scanline[x]) + cerr[x]; |
766 |
if (err > 127) |
767 |
err -= 255; |
768 |
else |
769 |
*dp |= 1<<(7-(x&07)); |
770 |
err /= 3; |
771 |
cerr[x] = err + errp; |
772 |
} |
773 |
} |
774 |
free((char *)cerr); |
775 |
} |
776 |
|
777 |
|
778 |
add2icon(y, scan) /* add a scanline to our icon data */ |
779 |
int y; |
780 |
COLR *scan; |
781 |
{ |
782 |
static short cerr[ICONSIZ]; |
783 |
static int ynext; |
784 |
static char *dp; |
785 |
register int err; |
786 |
register int x, ti; |
787 |
int errp; |
788 |
|
789 |
if (iconheight == 0) { /* initialize */ |
790 |
if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
791 |
iconwidth = xmax; |
792 |
iconheight = ymax; |
793 |
} else if (xmax > ymax) { |
794 |
iconwidth = ICONSIZ; |
795 |
iconheight = ICONSIZ*ymax/xmax; |
796 |
if (iconheight < 1) |
797 |
iconheight = 1; |
798 |
} else { |
799 |
iconwidth = ICONSIZ*xmax/ymax; |
800 |
if (iconwidth < 1) |
801 |
iconwidth = 1; |
802 |
iconheight = ICONSIZ; |
803 |
} |
804 |
ynext = 0; |
805 |
dp = icondata - 1; |
806 |
} |
807 |
if (y < ynext*ymax/iconheight) /* skip this one */ |
808 |
return; |
809 |
err = 0; |
810 |
for (x = 0; x < iconwidth; x++) { |
811 |
if (!(x&7)) |
812 |
*++dp = 0; |
813 |
errp = err; |
814 |
ti = x*xmax/iconwidth; |
815 |
err += normbright(scan[ti]) + cerr[x]; |
816 |
if (err > 127) |
817 |
err -= 255; |
818 |
else |
819 |
*dp |= 1<<(x&07); |
820 |
err /= 3; |
821 |
cerr[x] = err + errp; |
822 |
} |
823 |
ynext++; |
824 |
} |
825 |
|
826 |
|
827 |
getfull() /* get full (24-bit) data */ |
828 |
{ |
829 |
int y; |
830 |
register unsigned long *dp; |
831 |
register int x; |
832 |
/* set gamma correction */ |
833 |
setcolrgam(gamcor); |
834 |
/* read and convert file */ |
835 |
dp = (unsigned long *)ourdata; |
836 |
for (y = 0; y < ymax; y++) { |
837 |
getscan(y); |
838 |
if (scale) |
839 |
shiftcolrs(scanline, xmax, scale); |
840 |
colrs_gambs(scanline, xmax); |
841 |
add2icon(y, scanline); |
842 |
if (ourras->image->blue_mask & 1) |
843 |
for (x = 0; x < xmax; x++) |
844 |
*dp++ = scanline[x][RED] << 16 | |
845 |
scanline[x][GRN] << 8 | |
846 |
scanline[x][BLU] ; |
847 |
else |
848 |
for (x = 0; x < xmax; x++) |
849 |
*dp++ = scanline[x][RED] | |
850 |
scanline[x][GRN] << 8 | |
851 |
scanline[x][BLU] << 16 ; |
852 |
} |
853 |
} |
854 |
|
855 |
|
856 |
getgrey() /* get greyscale data */ |
857 |
{ |
858 |
int y; |
859 |
register unsigned char *dp; |
860 |
register int x; |
861 |
/* set gamma correction */ |
862 |
setcolrgam(gamcor); |
863 |
/* read and convert file */ |
864 |
dp = ourdata; |
865 |
for (y = 0; y < ymax; y++) { |
866 |
getscan(y); |
867 |
if (scale) |
868 |
shiftcolrs(scanline, xmax, scale); |
869 |
colrs_gambs(scanline, xmax); |
870 |
add2icon(y, scanline); |
871 |
if (maxcolors < 256) |
872 |
for (x = 0; x < xmax; x++) |
873 |
*dp++ = ((long)normbright(scanline[x]) * |
874 |
maxcolors + 128) >> 8; |
875 |
else |
876 |
for (x = 0; x < xmax; x++) |
877 |
*dp++ = normbright(scanline[x]); |
878 |
} |
879 |
for (x = 0; x < maxcolors; x++) |
880 |
clrtab[x][RED] = clrtab[x][GRN] = |
881 |
clrtab[x][BLU] = ((long)x*256+maxcolors/2)/maxcolors; |
882 |
} |
883 |
|
884 |
|
885 |
getmapped() /* get color-mapped data */ |
886 |
{ |
887 |
int y; |
888 |
/* set gamma correction */ |
889 |
setcolrgam(gamcor); |
890 |
/* make histogram */ |
891 |
new_histo(); |
892 |
for (y = 0; y < ymax; y++) { |
893 |
if (getscan(y) < 0) |
894 |
quiterr("seek error in getmapped"); |
895 |
if (scale) |
896 |
shiftcolrs(scanline, xmax, scale); |
897 |
colrs_gambs(scanline, xmax); |
898 |
add2icon(y, scanline); |
899 |
cnt_colrs(scanline, xmax); |
900 |
} |
901 |
/* map pixels */ |
902 |
if (!new_clrtab(maxcolors)) |
903 |
quiterr("cannot create color map"); |
904 |
for (y = 0; y < ymax; y++) { |
905 |
if (getscan(y) < 0) |
906 |
quiterr("seek error in getmapped"); |
907 |
if (scale) |
908 |
shiftcolrs(scanline, xmax, scale); |
909 |
colrs_gambs(scanline, xmax); |
910 |
if (dither) |
911 |
dith_colrs(ourdata+y*xmax, scanline, xmax); |
912 |
else |
913 |
map_colrs(ourdata+y*xmax, scanline, xmax); |
914 |
} |
915 |
} |
916 |
|
917 |
|
918 |
scale_rcolors(xr, sf) /* scale color map */ |
919 |
register XRASTER *xr; |
920 |
double sf; |
921 |
{ |
922 |
register int i; |
923 |
long maxv; |
924 |
|
925 |
if (xr->pixels == NULL) |
926 |
return; |
927 |
|
928 |
sf = pow(sf, 1.0/gamcor); |
929 |
maxv = 65535/sf; |
930 |
|
931 |
for (i = xr->ncolors; i--; ) { |
932 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
933 |
65535 : |
934 |
xr->cdefs[i].red * sf; |
935 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
936 |
65535 : |
937 |
xr->cdefs[i].green * sf; |
938 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
939 |
65535 : |
940 |
xr->cdefs[i].blue * sf; |
941 |
} |
942 |
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
943 |
} |
944 |
|
945 |
|
946 |
getscan(y) |
947 |
int y; |
948 |
{ |
949 |
if (y != cury) { |
950 |
if (scanpos == NULL || scanpos[y] == -1) |
951 |
return(-1); |
952 |
if (fseek(fin, scanpos[y], 0) == -1) |
953 |
quiterr("fseek error"); |
954 |
cury = y; |
955 |
} else if (scanpos != NULL && scanpos[y] == -1) |
956 |
scanpos[y] = ftell(fin); |
957 |
|
958 |
if (freadcolrs(scanline, xmax, fin) < 0) |
959 |
quiterr("read error"); |
960 |
|
961 |
cury++; |
962 |
return(0); |
963 |
} |