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 |
* |
18 |
* Anat Grynberg and Greg Ward |
19 |
*/ |
20 |
|
21 |
|
22 |
#include "standard.h" |
23 |
|
24 |
#include <X11/Xlib.h> |
25 |
#include <X11/cursorfont.h> |
26 |
#include <X11/Xutil.h> |
27 |
|
28 |
#include "color.h" |
29 |
#include "view.h" |
30 |
#include "pic.h" |
31 |
#include "x11raster.h" |
32 |
#include "random.h" |
33 |
#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 |
|
48 |
#define revline(x0,y0,x1,y1) XDrawLine(thedisplay,wind,revgc,x0,y0,x1,y1) |
49 |
|
50 |
#define redraw(x,y,w,h) patch_raster(wind,(x)-xoff,(y)-yoff,x,y,w,h,ourras) |
51 |
|
52 |
double gamcor = 2.2; /* gamma correction */ |
53 |
|
54 |
int dither = 1; /* dither colors? */ |
55 |
int fast = 0; /* keep picture in Pixmap? */ |
56 |
|
57 |
char *dispname = NULL; /* our display name */ |
58 |
|
59 |
Window wind = 0; /* our output window */ |
60 |
Font fontid; /* our font */ |
61 |
|
62 |
int maxcolors = 0; /* maximum colors */ |
63 |
int greyscale = 0; /* in grey */ |
64 |
|
65 |
int scale = 0; /* scalefactor; power of two */ |
66 |
|
67 |
int xoff = 0; /* x image offset */ |
68 |
int yoff = 0; /* y image offset */ |
69 |
|
70 |
VIEW ourview = STDVIEW; /* image view parameters */ |
71 |
int gotview = 0; /* got parameters from file */ |
72 |
|
73 |
COLR *scanline; /* scan line buffer */ |
74 |
|
75 |
RESOLU inpres; /* input resolution and ordering */ |
76 |
int xmax, ymax; /* picture dimensions */ |
77 |
int width, height; /* window size */ |
78 |
char *fname = NULL; /* input file name */ |
79 |
FILE *fin = stdin; /* input file */ |
80 |
long *scanpos = NULL; /* scan line positions in file */ |
81 |
int cury = 0; /* current scan location */ |
82 |
|
83 |
double exposure = 1.0; /* exposure compensation used */ |
84 |
|
85 |
int wrongformat = 0; /* input in another format? */ |
86 |
|
87 |
GC ourgc; /* standard graphics context */ |
88 |
GC revgc; /* graphics context with GXinvert */ |
89 |
|
90 |
int *ourrank; /* our visual class ranking */ |
91 |
XVisualInfo ourvis; /* our visual */ |
92 |
XRASTER *ourras; /* our stored image */ |
93 |
unsigned char *ourdata; /* our image data */ |
94 |
|
95 |
struct { |
96 |
int xmin, ymin, xsiz, ysiz; |
97 |
} box = {0, 0, 0, 0}; /* current box */ |
98 |
|
99 |
char *geometry = NULL; /* geometry specification */ |
100 |
|
101 |
char icondata[ICONSIZ*ICONSIZ/8]; /* icon bitmap data */ |
102 |
int iconwidth = 0, iconheight = 0; |
103 |
|
104 |
char *progname; |
105 |
|
106 |
char errmsg[128]; |
107 |
|
108 |
extern long ftell(); |
109 |
|
110 |
extern char *malloc(), *calloc(); |
111 |
|
112 |
extern double pow(), log(); |
113 |
|
114 |
Display *thedisplay; |
115 |
|
116 |
main(argc, argv) |
117 |
int argc; |
118 |
char *argv[]; |
119 |
{ |
120 |
int headline(); |
121 |
int i; |
122 |
|
123 |
progname = argv[0]; |
124 |
|
125 |
for (i = 1; i < argc; i++) |
126 |
if (argv[i][0] == '-') |
127 |
switch (argv[i][1]) { |
128 |
case 'c': |
129 |
maxcolors = atoi(argv[++i]); |
130 |
break; |
131 |
case 'b': |
132 |
greyscale = !greyscale; |
133 |
break; |
134 |
case 'm': |
135 |
maxcolors = 2; |
136 |
break; |
137 |
case 'd': |
138 |
if (argv[i][2] == 'i') |
139 |
dispname = argv[++i]; |
140 |
else |
141 |
dither = !dither; |
142 |
break; |
143 |
case 'f': |
144 |
fast = !fast; |
145 |
break; |
146 |
case 'e': |
147 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
148 |
goto userr; |
149 |
scale = atoi(argv[++i]); |
150 |
break; |
151 |
case 'g': |
152 |
if (argv[i][2] == 'e') |
153 |
geometry = argv[++i]; |
154 |
else |
155 |
gamcor = atof(argv[++i]); |
156 |
break; |
157 |
default: |
158 |
goto userr; |
159 |
} |
160 |
else if (argv[i][0] == '=') |
161 |
geometry = argv[i]; |
162 |
else |
163 |
break; |
164 |
|
165 |
if (i == argc-1) { |
166 |
fname = argv[i]; |
167 |
fin = fopen(fname, "r"); |
168 |
if (fin == NULL) { |
169 |
sprintf(errmsg, "cannot open file \"%s\"", fname); |
170 |
quiterr(errmsg); |
171 |
} |
172 |
} else if (i != argc) |
173 |
goto userr; |
174 |
/* get header */ |
175 |
getheader(fin, headline, NULL); |
176 |
/* get picture dimensions */ |
177 |
if (wrongformat || !fgetsresolu(&inpres, fin)) |
178 |
quiterr("bad picture format"); |
179 |
xmax = scanlen(&inpres); |
180 |
ymax = numscans(&inpres); |
181 |
/* set view parameters */ |
182 |
if (gotview && setview(&ourview) != NULL) |
183 |
gotview = 0; |
184 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
185 |
quiterr("out of memory"); |
186 |
|
187 |
init(); /* get file and open window */ |
188 |
|
189 |
for ( ; ; ) |
190 |
getevent(); /* main loop */ |
191 |
userr: |
192 |
fprintf(stderr, |
193 |
"Usage: %s [-display disp][-geometry spec][-b][-m][-d][-f][-c ncolors][-e +/-stops] file\n", |
194 |
progname); |
195 |
quit(1); |
196 |
} |
197 |
|
198 |
|
199 |
headline(s) /* get relevant info from header */ |
200 |
char *s; |
201 |
{ |
202 |
char fmt[32]; |
203 |
|
204 |
if (isexpos(s)) |
205 |
exposure *= exposval(s); |
206 |
else if (isformat(s)) { |
207 |
formatval(fmt, s); |
208 |
wrongformat = strcmp(fmt, COLRFMT); |
209 |
} else if (isview(s) && sscanview(&ourview, s) > 0) |
210 |
gotview++; |
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(dispname)) == NULL) |
229 |
quiterr("cannot open display"); |
230 |
/* get best visual for default screen */ |
231 |
getbestvis(); |
232 |
/* store image */ |
233 |
getras(); |
234 |
/* open window */ |
235 |
ourwinattr.border_pixel = ourblack; |
236 |
ourwinattr.background_pixel = ourwhite; |
237 |
ourwinattr.colormap = XCreateColormap(thedisplay, ourroot, |
238 |
ourvis.visual, AllocNone); |
239 |
wind = XCreateWindow(thedisplay, ourroot, 0, 0, xmax, ymax, BORWIDTH, |
240 |
ourvis.depth, InputOutput, ourvis.visual, |
241 |
CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr); |
242 |
if (wind == 0) |
243 |
quiterr("cannot create window"); |
244 |
width = xmax; |
245 |
height = ymax; |
246 |
ourgc = XCreateGC(thedisplay, wind, 0, 0); |
247 |
XSetState(thedisplay, ourgc, BlackPixel(thedisplay,ourscreen), |
248 |
WhitePixel(thedisplay,ourscreen), GXcopy, AllPlanes); |
249 |
revgc = XCreateGC(thedisplay, wind, 0, 0); |
250 |
XSetFunction(thedisplay, revgc, GXinvert); |
251 |
fontid = XLoadFont(thedisplay, FONTNAME); |
252 |
if (fontid == 0) |
253 |
quiterr("cannot get font"); |
254 |
XSetFont(thedisplay, ourgc, fontid); |
255 |
XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
256 |
XC_diamond_cross)); |
257 |
XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
258 |
if (geometry != NULL) { |
259 |
bzero((char *)&oursizhints, sizeof(oursizhints)); |
260 |
i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
261 |
(unsigned *)&oursizhints.width, |
262 |
(unsigned *)&oursizhints.height); |
263 |
if ((i&(WidthValue|HeightValue)) == (WidthValue|HeightValue)) |
264 |
oursizhints.flags |= USSize; |
265 |
else { |
266 |
oursizhints.width = xmax; |
267 |
oursizhints.height = ymax; |
268 |
oursizhints.flags |= PSize; |
269 |
} |
270 |
if ((i&(XValue|YValue)) == (XValue|YValue)) { |
271 |
oursizhints.flags |= USPosition; |
272 |
if (i & XNegative) |
273 |
oursizhints.x += DisplayWidth(thedisplay, |
274 |
ourscreen)-1-oursizhints.width-2*BORWIDTH; |
275 |
if (i & YNegative) |
276 |
oursizhints.y += DisplayHeight(thedisplay, |
277 |
ourscreen)-1-oursizhints.height-2*BORWIDTH; |
278 |
} |
279 |
XSetNormalHints(thedisplay, wind, &oursizhints); |
280 |
} |
281 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
282 |
ourxwmhints.input = True; |
283 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(thedisplay, |
284 |
wind, icondata, iconwidth, iconheight); |
285 |
XSetWMHints(thedisplay, wind, &ourxwmhints); |
286 |
XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask |
287 |
|ButtonMotionMask|StructureNotifyMask |
288 |
|KeyPressMask|ExposureMask); |
289 |
XMapWindow(thedisplay, wind); |
290 |
return; |
291 |
memerr: |
292 |
quiterr("out of memory"); |
293 |
} /* end of init */ |
294 |
|
295 |
|
296 |
quiterr(err) /* print message and exit */ |
297 |
char *err; |
298 |
{ |
299 |
if (err != NULL) { |
300 |
fprintf(stderr, "%s: %s\n", progname, err); |
301 |
exit(1); |
302 |
} |
303 |
exit(0); |
304 |
} |
305 |
|
306 |
|
307 |
eputs(s) |
308 |
char *s; |
309 |
{ |
310 |
fputs(s, stderr); |
311 |
} |
312 |
|
313 |
|
314 |
quit(code) |
315 |
int code; |
316 |
{ |
317 |
exit(code); |
318 |
} |
319 |
|
320 |
|
321 |
static int |
322 |
viscmp(v1,v2) /* compare visual to see which is better, descending */ |
323 |
register XVisualInfo *v1, *v2; |
324 |
{ |
325 |
int bad1 = 0, bad2 = 0; |
326 |
register int *rp; |
327 |
|
328 |
if (v1->class == v2->class) { |
329 |
if (v1->class == TrueColor || v1->class == DirectColor) { |
330 |
/* prefer 24-bit to 32-bit */ |
331 |
if (v1->depth == 24 && v2->depth == 32) |
332 |
return(-1); |
333 |
if (v1->depth == 32 && v2->depth == 24) |
334 |
return(1); |
335 |
return(0); |
336 |
} |
337 |
/* don't be too greedy */ |
338 |
if (maxcolors <= 1<<v1->depth && maxcolors <= 1<<v2->depth) |
339 |
return(v1->depth - v2->depth); |
340 |
return(v2->depth - v1->depth); |
341 |
} |
342 |
/* prefer Pseudo when < 24-bit */ |
343 |
if ((v1->class == TrueColor || v1->class == DirectColor) && |
344 |
v1->depth < 24) |
345 |
bad1 = 1; |
346 |
if ((v2->class == TrueColor || v2->class == DirectColor) && |
347 |
v2->depth < 24) |
348 |
bad2 = -1; |
349 |
if (bad1 | bad2) |
350 |
return(bad1+bad2); |
351 |
/* otherwise, use class ranking */ |
352 |
for (rp = ourrank; *rp != -1; rp++) { |
353 |
if (v1->class == *rp) |
354 |
return(-1); |
355 |
if (v2->class == *rp) |
356 |
return(1); |
357 |
} |
358 |
return(0); |
359 |
} |
360 |
|
361 |
|
362 |
getbestvis() /* get the best visual for this screen */ |
363 |
{ |
364 |
#ifdef DEBUG |
365 |
static char vistype[][12] = { |
366 |
"StaticGray", |
367 |
"GrayScale", |
368 |
"StaticColor", |
369 |
"PseudoColor", |
370 |
"TrueColor", |
371 |
"DirectColor" |
372 |
}; |
373 |
#endif |
374 |
static int rankings[3][6] = { |
375 |
{TrueColor,DirectColor,PseudoColor,GrayScale,StaticGray,-1}, |
376 |
{PseudoColor,GrayScale,StaticGray,-1}, |
377 |
{PseudoColor,GrayScale,StaticGray,-1} |
378 |
}; |
379 |
XVisualInfo *xvi; |
380 |
int vismatched; |
381 |
register int i, j; |
382 |
|
383 |
if (greyscale) { |
384 |
ourrank = rankings[2]; |
385 |
if (maxcolors < 2) maxcolors = 256; |
386 |
} else if (maxcolors >= 2 && maxcolors <= 256) |
387 |
ourrank = rankings[1]; |
388 |
else { |
389 |
ourrank = rankings[0]; |
390 |
maxcolors = 256; |
391 |
} |
392 |
/* find best visual */ |
393 |
ourvis.screen = ourscreen; |
394 |
xvi = XGetVisualInfo(thedisplay,VisualScreenMask,&ourvis,&vismatched); |
395 |
if (xvi == NULL) |
396 |
quiterr("no visuals for this screen!"); |
397 |
#ifdef DEBUG |
398 |
fprintf(stderr, "Supported visuals:\n"); |
399 |
for (i = 0; i < vismatched; i++) |
400 |
fprintf(stderr, "\ttype %s, depth %d\n", |
401 |
vistype[xvi[i].class], xvi[i].depth); |
402 |
#endif |
403 |
for (i = 0, j = 1; j < vismatched; j++) |
404 |
if (viscmp(&xvi[i],&xvi[j]) > 0) |
405 |
i = j; |
406 |
/* compare to least acceptable */ |
407 |
for (j = 0; ourrank[j++] != -1; ) |
408 |
; |
409 |
ourvis.class = ourrank[--j]; |
410 |
ourvis.depth = 1; |
411 |
if (viscmp(&xvi[i],&ourvis) > 0) |
412 |
quiterr("inadequate visuals on this screen"); |
413 |
/* OK, we'll use it */ |
414 |
copystruct(&ourvis, &xvi[i]); |
415 |
#ifdef DEBUG |
416 |
fprintf(stderr, "Selected visual type %s, depth %d\n", |
417 |
vistype[ourvis.class], ourvis.depth); |
418 |
#endif |
419 |
if (ourvis.class == GrayScale || ourvis.class == StaticGray) |
420 |
greyscale = 1; |
421 |
if (ourvis.depth <= 8 && ourvis.colormap_size < maxcolors) |
422 |
maxcolors = ourvis.colormap_size; |
423 |
if (maxcolors > 4) |
424 |
maxcolors -= 2; |
425 |
XFree((char *)xvi); |
426 |
} |
427 |
|
428 |
|
429 |
getras() /* get raster file */ |
430 |
{ |
431 |
colormap ourmap; |
432 |
XVisualInfo vinfo; |
433 |
|
434 |
if (maxcolors <= 2) { /* monochrome */ |
435 |
ourdata = (unsigned char *)malloc(ymax*((xmax+7)/8)); |
436 |
if (ourdata == NULL) |
437 |
goto fail; |
438 |
ourras = make_raster(thedisplay, &ourvis, 1, ourdata, |
439 |
xmax, ymax, 8); |
440 |
if (ourras == NULL) |
441 |
goto fail; |
442 |
getmono(); |
443 |
} else if (ourvis.class == TrueColor || ourvis.class == DirectColor) { |
444 |
ourdata = (unsigned char *)malloc(4*xmax*ymax); |
445 |
if (ourdata == NULL) |
446 |
goto fail; |
447 |
ourras = make_raster(thedisplay, &ourvis, 32, |
448 |
ourdata, xmax, ymax, 32); |
449 |
if (ourras == NULL) |
450 |
goto fail; |
451 |
getfull(); |
452 |
} else { |
453 |
ourdata = (unsigned char *)malloc(xmax*ymax); |
454 |
if (ourdata == NULL) |
455 |
goto fail; |
456 |
ourras = make_raster(thedisplay, &ourvis, 8, ourdata, |
457 |
xmax, ymax, 8); |
458 |
if (ourras == NULL) |
459 |
goto fail; |
460 |
if (ourvis.class == StaticGray) |
461 |
getgrey(); |
462 |
else { |
463 |
if (greyscale) |
464 |
biq(dither,maxcolors,1,ourmap); |
465 |
else |
466 |
ciq(dither,maxcolors,1,ourmap); |
467 |
if (init_rcolors(ourras, ourmap[0], |
468 |
ourmap[1], ourmap[2]) == 0) |
469 |
goto fail; |
470 |
} |
471 |
} |
472 |
return; |
473 |
fail: |
474 |
quiterr("could not create raster image"); |
475 |
} |
476 |
|
477 |
|
478 |
getevent() /* process the next event */ |
479 |
{ |
480 |
union { |
481 |
XEvent u; |
482 |
XConfigureEvent c; |
483 |
XExposeEvent e; |
484 |
XButtonPressedEvent b; |
485 |
XKeyPressedEvent k; |
486 |
} e; |
487 |
|
488 |
XNextEvent(thedisplay, &e.u); |
489 |
switch (e.u.type) { |
490 |
case KeyPress: |
491 |
docom(&e.k); |
492 |
break; |
493 |
case ConfigureNotify: |
494 |
width = e.c.width; |
495 |
height = e.c.height; |
496 |
break; |
497 |
case MapNotify: |
498 |
map_rcolors(ourras, wind); |
499 |
if (fast) |
500 |
make_rpixmap(ourras, wind); |
501 |
break; |
502 |
case UnmapNotify: |
503 |
if (!fast) |
504 |
unmap_rcolors(ourras); |
505 |
break; |
506 |
case Expose: |
507 |
redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
508 |
break; |
509 |
case ButtonPress: |
510 |
if (e.b.state & (ShiftMask|ControlMask)) |
511 |
moveimage(&e.b); |
512 |
else |
513 |
getbox(&e.b); |
514 |
break; |
515 |
} |
516 |
} |
517 |
|
518 |
|
519 |
docom(ekey) /* execute command */ |
520 |
XKeyPressedEvent *ekey; |
521 |
{ |
522 |
char buf[80]; |
523 |
COLOR cval; |
524 |
XColor cvx; |
525 |
int com, n; |
526 |
double comp; |
527 |
FLOAT hv[2]; |
528 |
FVECT rorg, rdir; |
529 |
|
530 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
531 |
if (n == 0) |
532 |
return(0); |
533 |
com = buf[0]; |
534 |
switch (com) { /* interpret command */ |
535 |
case 'q': |
536 |
case CTRL('D'): /* quit */ |
537 |
quit(0); |
538 |
case '\n': |
539 |
case '\r': |
540 |
case 'l': |
541 |
case 'c': /* value */ |
542 |
if (avgbox(cval) == -1) |
543 |
return(-1); |
544 |
switch (com) { |
545 |
case '\n': |
546 |
case '\r': /* radiance */ |
547 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
548 |
break; |
549 |
case 'l': /* luminance */ |
550 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
551 |
break; |
552 |
case 'c': /* color */ |
553 |
comp = pow(2.0, (double)scale); |
554 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
555 |
colval(cval,RED)*comp, |
556 |
colval(cval,GRN)*comp, |
557 |
colval(cval,BLU)*comp); |
558 |
break; |
559 |
} |
560 |
XDrawImageString(thedisplay, wind, ourgc, |
561 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
562 |
return(0); |
563 |
case 'i': /* identify (contour) */ |
564 |
if (ourras->pixels == NULL) |
565 |
return(-1); |
566 |
n = ourdata[ekey->x-xoff+xmax*(ekey->y-yoff)]; |
567 |
n = ourras->pmap[n]; |
568 |
cvx.pixel = ourras->cdefs[n].pixel; |
569 |
cvx.red = random() & 65535; |
570 |
cvx.green = random() & 65535; |
571 |
cvx.blue = random() & 65535; |
572 |
cvx.flags = DoRed|DoGreen|DoBlue; |
573 |
XStoreColor(thedisplay, ourras->cmap, &cvx); |
574 |
return(0); |
575 |
case 'p': /* position */ |
576 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
577 |
sprintf(buf, "(%d,%d)", (int)(hv[0]*inpres.xr), |
578 |
(int)(hv[1]*inpres.yr)); |
579 |
XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
580 |
buf, strlen(buf)); |
581 |
return(0); |
582 |
case 't': /* trace */ |
583 |
if (!gotview) { |
584 |
XBell(thedisplay, 0); |
585 |
return(-1); |
586 |
} |
587 |
pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
588 |
if (viewray(rorg, rdir, &ourview, hv[0], hv[1]) < 0) |
589 |
return(-1); |
590 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
591 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
592 |
fflush(stdout); |
593 |
return(0); |
594 |
case '=': /* adjust exposure */ |
595 |
if (avgbox(cval) == -1) |
596 |
return(-1); |
597 |
n = log(.5/bright(cval))/.69315 - scale; /* truncate */ |
598 |
if (n == 0) |
599 |
return(0); |
600 |
scale_rcolors(ourras, pow(2.0, (double)n)); |
601 |
scale += n; |
602 |
sprintf(buf, "%+d", scale); |
603 |
XDrawImageString(thedisplay, wind, ourgc, |
604 |
box.xmin, box.ymin+box.ysiz, buf, strlen(buf)); |
605 |
XFlush(thedisplay); |
606 |
free(ourdata); |
607 |
free_raster(ourras); |
608 |
getras(); |
609 |
/* fall through */ |
610 |
case CTRL('R'): /* redraw */ |
611 |
case CTRL('L'): |
612 |
unmap_rcolors(ourras); |
613 |
XClearWindow(thedisplay, wind); |
614 |
map_rcolors(ourras, wind); |
615 |
if (fast) |
616 |
make_rpixmap(ourras); |
617 |
redraw(0, 0, width, height); |
618 |
return(0); |
619 |
case ' ': /* clear */ |
620 |
redraw(box.xmin, box.ymin, box.xsiz, box.ysiz); |
621 |
return(0); |
622 |
default: |
623 |
XBell(thedisplay, 0); |
624 |
return(-1); |
625 |
} |
626 |
} |
627 |
|
628 |
|
629 |
moveimage(ebut) /* shift the image */ |
630 |
XButtonPressedEvent *ebut; |
631 |
{ |
632 |
union { |
633 |
XEvent u; |
634 |
XButtonReleasedEvent b; |
635 |
XPointerMovedEvent m; |
636 |
} e; |
637 |
int mxo, myo; |
638 |
|
639 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
640 |
while (e.u.type == MotionNotify) { |
641 |
mxo = e.m.x; |
642 |
myo = e.m.y; |
643 |
revline(ebut->x, ebut->y, mxo, myo); |
644 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
645 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
646 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
647 |
revline(ebut->x, ebut->y, mxo, myo); |
648 |
revbox(xoff+mxo-ebut->x, yoff+myo-ebut->y, |
649 |
xoff+mxo-ebut->x+xmax, yoff+myo-ebut->y+ymax); |
650 |
} |
651 |
xoff += e.b.x - ebut->x; |
652 |
yoff += e.b.y - ebut->y; |
653 |
XClearWindow(thedisplay, wind); |
654 |
redraw(0, 0, width, height); |
655 |
} |
656 |
|
657 |
|
658 |
getbox(ebut) /* get new box */ |
659 |
XButtonPressedEvent *ebut; |
660 |
{ |
661 |
union { |
662 |
XEvent u; |
663 |
XButtonReleasedEvent b; |
664 |
XPointerMovedEvent m; |
665 |
} e; |
666 |
|
667 |
XMaskEvent(thedisplay, ButtonReleaseMask|ButtonMotionMask, &e.u); |
668 |
while (e.u.type == MotionNotify) { |
669 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
670 |
XMaskEvent(thedisplay,ButtonReleaseMask|ButtonMotionMask,&e.u); |
671 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
672 |
} |
673 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
674 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
675 |
if (box.xmin > ebut->x) { |
676 |
box.xsiz = box.xmin - ebut->x + 1; |
677 |
box.xmin = ebut->x; |
678 |
} else { |
679 |
box.xsiz = ebut->x - box.xmin + 1; |
680 |
} |
681 |
if (box.ymin > ebut->y) { |
682 |
box.ysiz = box.ymin - ebut->y + 1; |
683 |
box.ymin = ebut->y; |
684 |
} else { |
685 |
box.ysiz = ebut->y - box.ymin + 1; |
686 |
} |
687 |
} |
688 |
|
689 |
|
690 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
691 |
int x0, y0, x1, y1; |
692 |
{ |
693 |
revline(x0, y0, x1, y0); |
694 |
revline(x0, y1, x1, y1); |
695 |
revline(x0, y0, x0, y1); |
696 |
revline(x1, y0, x1, y1); |
697 |
} |
698 |
|
699 |
|
700 |
avgbox(clr) /* average color over current box */ |
701 |
COLOR clr; |
702 |
{ |
703 |
static COLOR lc; |
704 |
static int ll, lr, lt, lb; |
705 |
int left, right, top, bottom; |
706 |
int y; |
707 |
double d; |
708 |
COLOR ctmp; |
709 |
register int x; |
710 |
|
711 |
setcolor(clr, 0.0, 0.0, 0.0); |
712 |
left = box.xmin - xoff; |
713 |
right = left + box.xsiz; |
714 |
if (left < 0) |
715 |
left = 0; |
716 |
if (right > xmax) |
717 |
right = xmax; |
718 |
if (left >= right) |
719 |
return(-1); |
720 |
top = box.ymin - yoff; |
721 |
bottom = top + box.ysiz; |
722 |
if (top < 0) |
723 |
top = 0; |
724 |
if (bottom > ymax) |
725 |
bottom = ymax; |
726 |
if (top >= bottom) |
727 |
return(-1); |
728 |
if (left == ll && right == lr && top == lt && bottom == lb) { |
729 |
copycolor(clr, lc); |
730 |
return; |
731 |
} |
732 |
for (y = top; y < bottom; y++) { |
733 |
if (getscan(y) == -1) |
734 |
return(-1); |
735 |
for (x = left; x < right; x++) { |
736 |
colr_color(ctmp, scanline[x]); |
737 |
addcolor(clr, ctmp); |
738 |
} |
739 |
} |
740 |
d = 1.0/((right-left)*(bottom-top)); |
741 |
scalecolor(clr, d); |
742 |
ll = left; lr = right; lt = top; lb = bottom; |
743 |
copycolor(lc, clr); |
744 |
return(0); |
745 |
} |
746 |
|
747 |
|
748 |
getmono() /* get monochrome data */ |
749 |
{ |
750 |
register unsigned char *dp; |
751 |
register int x, err; |
752 |
int y, errp; |
753 |
short *cerr; |
754 |
|
755 |
if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
756 |
quiterr("out of memory in getmono"); |
757 |
dp = ourdata - 1; |
758 |
for (y = 0; y < ymax; y++) { |
759 |
if (getscan(y) < 0) |
760 |
quiterr("seek error in getmono"); |
761 |
normcolrs(scanline, xmax, scale); |
762 |
add2icon(y, scanline); |
763 |
err = 0; |
764 |
for (x = 0; x < xmax; x++) { |
765 |
if (!(x&7)) |
766 |
*++dp = 0; |
767 |
errp = err; |
768 |
err += normbright(scanline[x]) + cerr[x]; |
769 |
if (err > 127) |
770 |
err -= 255; |
771 |
else |
772 |
*dp |= 1<<(7-(x&07)); |
773 |
err /= 3; |
774 |
cerr[x] = err + errp; |
775 |
} |
776 |
} |
777 |
free((char *)cerr); |
778 |
} |
779 |
|
780 |
|
781 |
add2icon(y, scan) /* add a scanline to our icon data */ |
782 |
int y; |
783 |
COLR *scan; |
784 |
{ |
785 |
static short cerr[ICONSIZ]; |
786 |
static int ynext; |
787 |
static char *dp; |
788 |
register int err; |
789 |
register int x, ti; |
790 |
int errp; |
791 |
|
792 |
if (iconheight == 0) { /* initialize */ |
793 |
if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
794 |
iconwidth = xmax; |
795 |
iconheight = ymax; |
796 |
} else if (xmax > ymax) { |
797 |
iconwidth = ICONSIZ; |
798 |
iconheight = ICONSIZ*ymax/xmax; |
799 |
if (iconheight < 1) |
800 |
iconheight = 1; |
801 |
} else { |
802 |
iconwidth = ICONSIZ*xmax/ymax; |
803 |
if (iconwidth < 1) |
804 |
iconwidth = 1; |
805 |
iconheight = ICONSIZ; |
806 |
} |
807 |
ynext = 0; |
808 |
dp = icondata - 1; |
809 |
} |
810 |
if (y < ynext*ymax/iconheight) /* skip this one */ |
811 |
return; |
812 |
err = 0; |
813 |
for (x = 0; x < iconwidth; x++) { |
814 |
if (!(x&7)) |
815 |
*++dp = 0; |
816 |
errp = err; |
817 |
ti = x*xmax/iconwidth; |
818 |
err += normbright(scan[ti]) + cerr[x]; |
819 |
if (err > 127) |
820 |
err -= 255; |
821 |
else |
822 |
*dp |= 1<<(x&07); |
823 |
err /= 3; |
824 |
cerr[x] = err + errp; |
825 |
} |
826 |
ynext++; |
827 |
} |
828 |
|
829 |
|
830 |
getfull() /* get full (24-bit) data */ |
831 |
{ |
832 |
int y; |
833 |
register unsigned long *dp; |
834 |
register int x; |
835 |
/* set gamma correction */ |
836 |
setcolrgam(gamcor); |
837 |
/* read and convert file */ |
838 |
dp = (unsigned long *)ourdata; |
839 |
for (y = 0; y < ymax; y++) { |
840 |
if (getscan(y) < 0) |
841 |
quiterr("seek error in getfull"); |
842 |
if (scale) |
843 |
shiftcolrs(scanline, xmax, scale); |
844 |
colrs_gambs(scanline, xmax); |
845 |
add2icon(y, scanline); |
846 |
if (ourras->image->blue_mask & 1) |
847 |
for (x = 0; x < xmax; x++) |
848 |
*dp++ = scanline[x][RED] << 16 | |
849 |
scanline[x][GRN] << 8 | |
850 |
scanline[x][BLU] ; |
851 |
else |
852 |
for (x = 0; x < xmax; x++) |
853 |
*dp++ = scanline[x][RED] | |
854 |
scanline[x][GRN] << 8 | |
855 |
scanline[x][BLU] << 16 ; |
856 |
} |
857 |
} |
858 |
|
859 |
|
860 |
getgrey() /* get greyscale data */ |
861 |
{ |
862 |
int y; |
863 |
register unsigned char *dp; |
864 |
register int x; |
865 |
/* set gamma correction */ |
866 |
setcolrgam(gamcor); |
867 |
/* read and convert file */ |
868 |
dp = ourdata; |
869 |
for (y = 0; y < ymax; y++) { |
870 |
if (getscan(y) < 0) |
871 |
quiterr("seek error in getfull"); |
872 |
if (scale) |
873 |
shiftcolrs(scanline, xmax, scale); |
874 |
colrs_gambs(scanline, xmax); |
875 |
add2icon(y, scanline); |
876 |
if (ourvis.colormap_size < 256) |
877 |
for (x = 0; x < xmax; x++) |
878 |
*dp++ = ((long)normbright(scanline[x]) * |
879 |
ourvis.colormap_size + 128) >> 8; |
880 |
else |
881 |
for (x = 0; x < xmax; x++) |
882 |
*dp++ = normbright(scanline[x]); |
883 |
} |
884 |
} |
885 |
|
886 |
|
887 |
scale_rcolors(xr, sf) /* scale color map */ |
888 |
register XRASTER *xr; |
889 |
double sf; |
890 |
{ |
891 |
register int i; |
892 |
long maxv; |
893 |
|
894 |
if (xr->pixels == NULL) |
895 |
return; |
896 |
|
897 |
sf = pow(sf, 1.0/gamcor); |
898 |
maxv = 65535/sf; |
899 |
|
900 |
for (i = xr->ncolors; i--; ) { |
901 |
xr->cdefs[i].red = xr->cdefs[i].red > maxv ? |
902 |
65535 : |
903 |
xr->cdefs[i].red * sf; |
904 |
xr->cdefs[i].green = xr->cdefs[i].green > maxv ? |
905 |
65535 : |
906 |
xr->cdefs[i].green * sf; |
907 |
xr->cdefs[i].blue = xr->cdefs[i].blue > maxv ? |
908 |
65535 : |
909 |
xr->cdefs[i].blue * sf; |
910 |
} |
911 |
XStoreColors(thedisplay, xr->cmap, xr->cdefs, xr->ncolors); |
912 |
} |
913 |
|
914 |
|
915 |
getscan(y) |
916 |
int y; |
917 |
{ |
918 |
if (y != cury) { |
919 |
if (scanpos == NULL || scanpos[y] == -1) |
920 |
return(-1); |
921 |
if (fseek(fin, scanpos[y], 0) == -1) |
922 |
quiterr("fseek error"); |
923 |
cury = y; |
924 |
} else if (scanpos != NULL) |
925 |
scanpos[y] = ftell(fin); |
926 |
|
927 |
if (freadcolrs(scanline, xmax, fin) < 0) |
928 |
quiterr("read error"); |
929 |
|
930 |
cury++; |
931 |
return(0); |
932 |
} |
933 |
|
934 |
|
935 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
936 |
int y; |
937 |
register rgbpixel *l3; |
938 |
{ |
939 |
register int i; |
940 |
/* read scanline */ |
941 |
if (getscan(y) < 0) |
942 |
quiterr("cannot seek for picreadline"); |
943 |
/* convert scanline */ |
944 |
normcolrs(scanline, xmax, scale); |
945 |
add2icon(y, scanline); |
946 |
for (i = 0; i < xmax; i++) { |
947 |
l3[i].r = scanline[i][RED]; |
948 |
l3[i].g = scanline[i][GRN]; |
949 |
l3[i].b = scanline[i][BLU]; |
950 |
} |
951 |
} |
952 |
|
953 |
|
954 |
picwriteline(y, l) /* add 8-bit scanline to image */ |
955 |
int y; |
956 |
pixel *l; |
957 |
{ |
958 |
bcopy((char *)l, (char *)ourdata+y*xmax, xmax); |
959 |
} |
960 |
|
961 |
|
962 |
picreadcm(map) /* do gamma correction */ |
963 |
colormap map; |
964 |
{ |
965 |
extern double pow(); |
966 |
register int i, val; |
967 |
|
968 |
for (i = 0; i < 256; i++) { |
969 |
val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
970 |
map[0][i] = map[1][i] = map[2][i] = val; |
971 |
} |
972 |
} |
973 |
|
974 |
|
975 |
picwritecm(map) /* handled elsewhere */ |
976 |
colormap map; |
977 |
{ |
978 |
#if 0 |
979 |
register int i; |
980 |
|
981 |
for (i = 0; i < 256; i++) |
982 |
printf("%d %d %d\n", map[0][i],map[1][i],map[2][i]); |
983 |
#endif |
984 |
} |