1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rview.c,v 2.31 2008/09/05 19:45:42 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* rview.c - routines and variables for interactive view generation. |
6 |
* |
7 |
* External symbols declared in rpaint.h |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <signal.h> |
13 |
#include <ctype.h> |
14 |
|
15 |
#include "ray.h" |
16 |
#include "rpaint.h" |
17 |
|
18 |
#define CTRL(c) ((c)-'@') |
19 |
|
20 |
|
21 |
void |
22 |
quit(code) /* quit program */ |
23 |
int code; |
24 |
{ |
25 |
#ifdef MSTATS |
26 |
if (code == 2 && errno == ENOMEM) |
27 |
printmemstats(stderr); |
28 |
#endif |
29 |
if (ray_pnprocs > 0) /* close children if any */ |
30 |
ray_pclose(0); |
31 |
devclose(); |
32 |
exit(code); |
33 |
} |
34 |
|
35 |
|
36 |
void |
37 |
devopen( /* open device driver */ |
38 |
char *dname |
39 |
) |
40 |
{ |
41 |
extern char *progname, *octname; |
42 |
char *id; |
43 |
int i; |
44 |
|
45 |
id = octname!=NULL ? octname : progname; |
46 |
/* check device table */ |
47 |
for (i = 0; devtable[i].name; i++) |
48 |
if (!strcmp(dname, devtable[i].name)) { |
49 |
if ((dev = (*devtable[i].init)(dname, id)) == NULL) { |
50 |
sprintf(errmsg, "cannot initialize %s", dname); |
51 |
error(USER, errmsg); |
52 |
} else |
53 |
return; |
54 |
} |
55 |
/* not there, try exec */ |
56 |
if ((dev = comm_init(dname, id)) == NULL) { |
57 |
sprintf(errmsg, "cannot start device \"%s\"", dname); |
58 |
error(USER, errmsg); |
59 |
} |
60 |
} |
61 |
|
62 |
|
63 |
void |
64 |
devclose(void) /* close our device */ |
65 |
{ |
66 |
if (dev != NULL) |
67 |
(*dev->close)(); |
68 |
dev = NULL; |
69 |
} |
70 |
|
71 |
|
72 |
void |
73 |
printdevices(void) /* print list of output devices */ |
74 |
{ |
75 |
int i; |
76 |
|
77 |
for (i = 0; devtable[i].name; i++) |
78 |
printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
79 |
} |
80 |
|
81 |
|
82 |
void |
83 |
rview(void) /* do a view */ |
84 |
{ |
85 |
char buf[32]; |
86 |
|
87 |
devopen(dvcname); /* open device */ |
88 |
newimage(NULL); /* start image */ |
89 |
|
90 |
for ( ; ; ) { /* quit in command() */ |
91 |
while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
92 |
command("done: "); |
93 |
errno = 0; |
94 |
if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
95 |
sprintf(buf, "%d sampling...\n", 1<<pdepth); |
96 |
(*dev->comout)(buf); |
97 |
rsample(); |
98 |
} else { |
99 |
sprintf(buf, "%d refining...\n", 1<<pdepth); |
100 |
(*dev->comout)(buf); |
101 |
refine(&ptrunk, pdepth+1); |
102 |
} |
103 |
if (dev->inpready) /* noticed some input */ |
104 |
command(": "); |
105 |
else /* finished this depth */ |
106 |
pdepth++; |
107 |
} |
108 |
} |
109 |
|
110 |
|
111 |
void |
112 |
command( /* get/execute command */ |
113 |
char *prompt |
114 |
) |
115 |
{ |
116 |
#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
117 |
char inpbuf[256]; |
118 |
char *args; |
119 |
again: |
120 |
(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
121 |
for (args = inpbuf; *args && *args != ' '; args++) |
122 |
; |
123 |
if (*args) *args++ = '\0'; |
124 |
else *++args = '\0'; |
125 |
|
126 |
if (waitrays() < 0) /* clear ray queue */ |
127 |
quit(1); |
128 |
|
129 |
switch (inpbuf[0]) { |
130 |
case 'f': /* new frame (|focus|free) */ |
131 |
if (badcom("frame")) { |
132 |
if (badcom("focus")) { |
133 |
if (badcom("free")) |
134 |
goto commerr; |
135 |
free_objmem(); |
136 |
break; |
137 |
} |
138 |
getfocus(args); |
139 |
break; |
140 |
} |
141 |
getframe(args); |
142 |
break; |
143 |
case 'v': /* view */ |
144 |
if (badcom("view")) |
145 |
goto commerr; |
146 |
getview(args); |
147 |
break; |
148 |
case 'l': /* last view */ |
149 |
if (badcom("last")) |
150 |
goto commerr; |
151 |
lastview(args); |
152 |
break; |
153 |
case 'V': /* save view */ |
154 |
if (badcom("V")) |
155 |
goto commerr; |
156 |
saveview(args); |
157 |
break; |
158 |
case 'L': /* load view */ |
159 |
if (badcom("L")) |
160 |
goto commerr; |
161 |
loadview(args); |
162 |
break; |
163 |
case 'e': /* exposure */ |
164 |
if (badcom("exposure")) |
165 |
goto commerr; |
166 |
getexposure(args); |
167 |
break; |
168 |
case 's': /* set a parameter */ |
169 |
if (badcom("set")) { |
170 |
#ifdef SIGTSTP |
171 |
if (!badcom("stop")) |
172 |
goto dostop; |
173 |
#endif |
174 |
goto commerr; |
175 |
} |
176 |
setparam(args); |
177 |
break; |
178 |
case 'n': /* new picture */ |
179 |
if (badcom("new")) |
180 |
goto commerr; |
181 |
newimage(args); |
182 |
break; |
183 |
case 't': /* trace a ray */ |
184 |
if (badcom("trace")) |
185 |
goto commerr; |
186 |
traceray(args); |
187 |
break; |
188 |
case 'a': /* aim camera */ |
189 |
if (badcom("aim")) |
190 |
goto commerr; |
191 |
getaim(args); |
192 |
break; |
193 |
case 'm': /* move camera (or memstats) */ |
194 |
if (badcom("move")) |
195 |
#ifdef MSTATS |
196 |
{ |
197 |
if (badcom("memory")) |
198 |
goto commerr; |
199 |
printmemstats(stderr); |
200 |
break; |
201 |
} |
202 |
#else |
203 |
goto commerr; |
204 |
#endif |
205 |
getmove(args); |
206 |
break; |
207 |
case 'r': /* rotate/repaint */ |
208 |
if (badcom("rotate")) { |
209 |
if (badcom("repaint")) { |
210 |
if (badcom("redraw")) |
211 |
goto commerr; |
212 |
redraw(); |
213 |
break; |
214 |
} |
215 |
getrepaint(args); |
216 |
break; |
217 |
} |
218 |
getrotate(args); |
219 |
break; |
220 |
case 'p': /* pivot view */ |
221 |
if (badcom("pivot")) { |
222 |
if (badcom("pause")) |
223 |
goto commerr; |
224 |
goto again; |
225 |
} |
226 |
getpivot(args); |
227 |
break; |
228 |
case CTRL('R'): /* redraw */ |
229 |
redraw(); |
230 |
break; |
231 |
case 'w': /* write */ |
232 |
if (badcom("write")) |
233 |
goto commerr; |
234 |
writepict(args); |
235 |
break; |
236 |
case 'q': /* quit */ |
237 |
if (badcom("quit")) |
238 |
goto commerr; |
239 |
quit(0); |
240 |
case CTRL('C'): /* interrupt */ |
241 |
goto again; |
242 |
#ifdef SIGTSTP |
243 |
case CTRL('Z'):; /* stop */ |
244 |
dostop: |
245 |
devclose(); |
246 |
kill(0, SIGTSTP); |
247 |
/* pc stops here */ |
248 |
devopen(dvcname); |
249 |
redraw(); |
250 |
break; |
251 |
#endif |
252 |
case '\0': /* continue */ |
253 |
break; |
254 |
default:; |
255 |
commerr: |
256 |
if (iscntrl(inpbuf[0])) |
257 |
sprintf(errmsg, "^%c: unknown control", |
258 |
inpbuf[0]|0100); |
259 |
else |
260 |
sprintf(errmsg, "%s: unknown command", inpbuf); |
261 |
error(COMMAND, errmsg); |
262 |
break; |
263 |
} |
264 |
#undef badcom |
265 |
} |
266 |
|
267 |
|
268 |
void |
269 |
rsample(void) /* sample the image */ |
270 |
{ |
271 |
int xsiz, ysiz, y; |
272 |
PNODE *p; |
273 |
PNODE **pl; |
274 |
int x; |
275 |
/* |
276 |
* We initialize the bottom row in the image at our current |
277 |
* resolution. During sampling, we check super-pixels to the |
278 |
* right and above by calling bigdiff(). If there is a significant |
279 |
* difference, we subsample the super-pixels. The testing process |
280 |
* includes initialization of the next row. |
281 |
*/ |
282 |
xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
283 |
ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
284 |
pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
285 |
if (pl == NULL) |
286 |
return; |
287 |
/* |
288 |
* Initialize the bottom row. |
289 |
*/ |
290 |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth); |
291 |
for (x = 1; x < xsiz; x++) { |
292 |
pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
293 |
pframe.d, &ptrunk, pdepth); |
294 |
} |
295 |
/* sample the image */ |
296 |
for (y = 0; /* y < ysiz */ ; y++) { |
297 |
for (x = 0; x < xsiz-1; x++) { |
298 |
if (dev->inpready || errno == ENOMEM) |
299 |
goto escape; |
300 |
/* |
301 |
* Test super-pixel to the right. |
302 |
*/ |
303 |
if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
304 |
pl[x+1]->v, maxdiff)) { |
305 |
refine(pl[x], 1); |
306 |
refine(pl[x+1], 1); |
307 |
} |
308 |
} |
309 |
if (y >= ysiz-1) |
310 |
break; |
311 |
for (x = 0; x < xsiz; x++) { |
312 |
if (dev->inpready || errno == ENOMEM) |
313 |
goto escape; |
314 |
/* |
315 |
* Find super-pixel at this position in next row. |
316 |
*/ |
317 |
p = findrect(pframe.l+((x*hresolu)>>pdepth), |
318 |
pframe.d+(((y+1)*vresolu)>>pdepth), |
319 |
&ptrunk, pdepth); |
320 |
/* |
321 |
* Test super-pixel in next row. |
322 |
*/ |
323 |
if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
324 |
refine(pl[x], 1); |
325 |
refine(p, 1); |
326 |
} |
327 |
/* |
328 |
* Copy into super-pixel array. |
329 |
*/ |
330 |
pl[x] = p; |
331 |
} |
332 |
} |
333 |
escape: |
334 |
free((void *)pl); |
335 |
} |
336 |
|
337 |
|
338 |
int |
339 |
refine( /* refine a node */ |
340 |
PNODE *p, |
341 |
int pd |
342 |
) |
343 |
{ |
344 |
int growth; |
345 |
int mx, my; |
346 |
int i; |
347 |
|
348 |
if (dev->inpready) /* quit for input */ |
349 |
return(0); |
350 |
|
351 |
if (pd <= 0) /* depth limit */ |
352 |
return(0); |
353 |
|
354 |
mx = (p->xmin + p->xmax) >> 1; |
355 |
my = (p->ymin + p->ymax) >> 1; |
356 |
growth = 0; |
357 |
|
358 |
if (p->kid == NULL) { /* subdivide */ |
359 |
|
360 |
if ((p->kid = newptree()) == NULL) |
361 |
return(0); |
362 |
|
363 |
p->kid[UR].xmin = mx; |
364 |
p->kid[UR].ymin = my; |
365 |
p->kid[UR].xmax = p->xmax; |
366 |
p->kid[UR].ymax = p->ymax; |
367 |
p->kid[UL].xmin = p->xmin; |
368 |
p->kid[UL].ymin = my; |
369 |
p->kid[UL].xmax = mx; |
370 |
p->kid[UL].ymax = p->ymax; |
371 |
p->kid[DR].xmin = mx; |
372 |
p->kid[DR].ymin = p->ymin; |
373 |
p->kid[DR].xmax = p->xmax; |
374 |
p->kid[DR].ymax = my; |
375 |
p->kid[DL].xmin = p->xmin; |
376 |
p->kid[DL].ymin = p->ymin; |
377 |
p->kid[DL].xmax = mx; |
378 |
p->kid[DL].ymax = my; |
379 |
/* |
380 |
* The following paint order can leave a black pixel |
381 |
* if redraw() is called in (*dev->paintr)(). |
382 |
*/ |
383 |
if (p->x >= mx && p->y >= my) |
384 |
pcopy(p, p->kid+UR); |
385 |
else if (paint(p->kid+UR) < 0) |
386 |
quit(1); |
387 |
if (p->x < mx && p->y >= my) |
388 |
pcopy(p, p->kid+UL); |
389 |
else if (paint(p->kid+UL) < 0) |
390 |
quit(1); |
391 |
if (p->x >= mx && p->y < my) |
392 |
pcopy(p, p->kid+DR); |
393 |
else if (paint(p->kid+DR) < 0) |
394 |
quit(1); |
395 |
if (p->x < mx && p->y < my) |
396 |
pcopy(p, p->kid+DL); |
397 |
else if (paint(p->kid+DL) < 0) |
398 |
quit(1); |
399 |
|
400 |
growth++; |
401 |
} |
402 |
/* do children */ |
403 |
if (mx > pframe.l) { |
404 |
if (my > pframe.d) |
405 |
growth += refine(p->kid+DL, pd-1); |
406 |
if (my < pframe.u) |
407 |
growth += refine(p->kid+UL, pd-1); |
408 |
} |
409 |
if (mx < pframe.r) { |
410 |
if (my > pframe.d) |
411 |
growth += refine(p->kid+DR, pd-1); |
412 |
if (my < pframe.u) |
413 |
growth += refine(p->kid+UR, pd-1); |
414 |
} |
415 |
return(growth); |
416 |
} |