1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rview.c,v 2.28 2005/06/13 20:07:56 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 |
devopen( /* open device driver */ |
23 |
char *dname |
24 |
) |
25 |
{ |
26 |
extern char *progname, *octname; |
27 |
char *id; |
28 |
int i; |
29 |
|
30 |
id = octname!=NULL ? octname : progname; |
31 |
/* check device table */ |
32 |
for (i = 0; devtable[i].name; i++) |
33 |
if (!strcmp(dname, devtable[i].name)) { |
34 |
if ((dev = (*devtable[i].init)(dname, id)) == NULL) { |
35 |
sprintf(errmsg, "cannot initialize %s", dname); |
36 |
error(USER, errmsg); |
37 |
} else |
38 |
return; |
39 |
} |
40 |
/* not there, try exec */ |
41 |
if ((dev = comm_init(dname, id)) == NULL) { |
42 |
sprintf(errmsg, "cannot start device \"%s\"", dname); |
43 |
error(USER, errmsg); |
44 |
} |
45 |
} |
46 |
|
47 |
|
48 |
void |
49 |
devclose(void) /* close our device */ |
50 |
{ |
51 |
if (dev != NULL) |
52 |
(*dev->close)(); |
53 |
dev = NULL; |
54 |
} |
55 |
|
56 |
|
57 |
void |
58 |
printdevices(void) /* print list of output devices */ |
59 |
{ |
60 |
int i; |
61 |
|
62 |
for (i = 0; devtable[i].name; i++) |
63 |
printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
64 |
} |
65 |
|
66 |
|
67 |
void |
68 |
rview(void) /* do a view */ |
69 |
{ |
70 |
char buf[32]; |
71 |
|
72 |
devopen(dvcname); /* open device */ |
73 |
newimage(NULL); /* start image */ |
74 |
|
75 |
for ( ; ; ) { /* quit in command() */ |
76 |
while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
77 |
command("done: "); |
78 |
errno = 0; |
79 |
if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
80 |
sprintf(buf, "%d sampling...\n", 1<<pdepth); |
81 |
(*dev->comout)(buf); |
82 |
rsample(); |
83 |
} else { |
84 |
sprintf(buf, "%d refining...\n", 1<<pdepth); |
85 |
(*dev->comout)(buf); |
86 |
refine(&ptrunk, pdepth+1); |
87 |
} |
88 |
if (waitrays() < 0) |
89 |
quit(1); |
90 |
if (dev->inpready) /* noticed some input */ |
91 |
command(": "); |
92 |
else /* finished this depth */ |
93 |
pdepth++; |
94 |
} |
95 |
} |
96 |
|
97 |
|
98 |
void |
99 |
command( /* get/execute command */ |
100 |
char *prompt |
101 |
) |
102 |
{ |
103 |
#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
104 |
char inpbuf[256]; |
105 |
char *args; |
106 |
again: |
107 |
(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
108 |
for (args = inpbuf; *args && *args != ' '; args++) |
109 |
; |
110 |
if (*args) *args++ = '\0'; |
111 |
else *++args = '\0'; |
112 |
|
113 |
switch (inpbuf[0]) { |
114 |
case 'f': /* new frame (|focus|free) */ |
115 |
if (badcom("frame")) { |
116 |
if (badcom("focus")) { |
117 |
if (badcom("free")) |
118 |
goto commerr; |
119 |
free_objmem(); |
120 |
break; |
121 |
} |
122 |
getfocus(args); |
123 |
break; |
124 |
} |
125 |
getframe(args); |
126 |
break; |
127 |
case 'v': /* view */ |
128 |
if (badcom("view")) |
129 |
goto commerr; |
130 |
getview(args); |
131 |
break; |
132 |
case 'l': /* last view */ |
133 |
if (badcom("last")) |
134 |
goto commerr; |
135 |
lastview(args); |
136 |
break; |
137 |
case 'V': /* save view */ |
138 |
if (badcom("V")) |
139 |
goto commerr; |
140 |
saveview(args); |
141 |
break; |
142 |
case 'L': /* load view */ |
143 |
if (badcom("L")) |
144 |
goto commerr; |
145 |
loadview(args); |
146 |
break; |
147 |
case 'e': /* exposure */ |
148 |
if (badcom("exposure")) |
149 |
goto commerr; |
150 |
getexposure(args); |
151 |
break; |
152 |
case 's': /* set a parameter */ |
153 |
if (badcom("set")) { |
154 |
#ifdef SIGTSTP |
155 |
if (!badcom("stop")) |
156 |
goto dostop; |
157 |
#endif |
158 |
goto commerr; |
159 |
} |
160 |
setparam(args); |
161 |
break; |
162 |
case 'n': /* new picture */ |
163 |
if (badcom("new")) |
164 |
goto commerr; |
165 |
newimage(args); |
166 |
break; |
167 |
case 't': /* trace a ray */ |
168 |
if (badcom("trace")) |
169 |
goto commerr; |
170 |
traceray(args); |
171 |
break; |
172 |
case 'a': /* aim camera */ |
173 |
if (badcom("aim")) |
174 |
goto commerr; |
175 |
getaim(args); |
176 |
break; |
177 |
case 'm': /* move camera (or memstats) */ |
178 |
if (badcom("move")) |
179 |
#ifdef MSTATS |
180 |
{ |
181 |
if (badcom("memory")) |
182 |
goto commerr; |
183 |
printmemstats(stderr); |
184 |
break; |
185 |
} |
186 |
#else |
187 |
goto commerr; |
188 |
#endif |
189 |
getmove(args); |
190 |
break; |
191 |
case 'r': /* rotate/repaint */ |
192 |
if (badcom("rotate")) { |
193 |
if (badcom("repaint")) { |
194 |
if (badcom("redraw")) |
195 |
goto commerr; |
196 |
redraw(); |
197 |
break; |
198 |
} |
199 |
getrepaint(args); |
200 |
break; |
201 |
} |
202 |
getrotate(args); |
203 |
break; |
204 |
case 'p': /* pivot view */ |
205 |
if (badcom("pivot")) { |
206 |
if (badcom("pause")) |
207 |
goto commerr; |
208 |
goto again; |
209 |
} |
210 |
getpivot(args); |
211 |
break; |
212 |
case CTRL('R'): /* redraw */ |
213 |
redraw(); |
214 |
break; |
215 |
case 'w': /* write */ |
216 |
if (badcom("write")) |
217 |
goto commerr; |
218 |
writepict(args); |
219 |
break; |
220 |
case 'q': /* quit */ |
221 |
if (badcom("quit")) |
222 |
goto commerr; |
223 |
quit(0); |
224 |
case CTRL('C'): /* interrupt */ |
225 |
goto again; |
226 |
#ifdef SIGTSTP |
227 |
case CTRL('Z'):; /* stop */ |
228 |
dostop: |
229 |
devclose(); |
230 |
kill(0, SIGTSTP); |
231 |
/* pc stops here */ |
232 |
devopen(dvcname); |
233 |
redraw(); |
234 |
break; |
235 |
#endif |
236 |
case '\0': /* continue */ |
237 |
break; |
238 |
default:; |
239 |
commerr: |
240 |
if (iscntrl(inpbuf[0])) |
241 |
sprintf(errmsg, "^%c: unknown control", |
242 |
inpbuf[0]|0100); |
243 |
else |
244 |
sprintf(errmsg, "%s: unknown command", inpbuf); |
245 |
error(COMMAND, errmsg); |
246 |
break; |
247 |
} |
248 |
#undef badcom |
249 |
} |
250 |
|
251 |
|
252 |
void |
253 |
rsample(void) /* sample the image */ |
254 |
{ |
255 |
int xsiz, ysiz, y; |
256 |
PNODE *p; |
257 |
PNODE **pl; |
258 |
int x; |
259 |
/* |
260 |
* We initialize the bottom row in the image at our current |
261 |
* resolution. During sampling, we check super-pixels to the |
262 |
* right and above by calling bigdiff(). If there is a significant |
263 |
* difference, we subsample the super-pixels. The testing process |
264 |
* includes initialization of the next row. |
265 |
*/ |
266 |
xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
267 |
ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
268 |
pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
269 |
if (pl == NULL) |
270 |
return; |
271 |
/* |
272 |
* Initialize the bottom row. |
273 |
*/ |
274 |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth); |
275 |
for (x = 1; x < xsiz; x++) { |
276 |
pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
277 |
pframe.d, &ptrunk, pdepth); |
278 |
} |
279 |
/* sample the image */ |
280 |
for (y = 0; /* y < ysiz */ ; y++) { |
281 |
for (x = 0; x < xsiz-1; x++) { |
282 |
if (dev->inpready || errno == ENOMEM) |
283 |
goto escape; |
284 |
/* |
285 |
* Test super-pixel to the right. |
286 |
*/ |
287 |
if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
288 |
pl[x+1]->v, maxdiff)) { |
289 |
refine(pl[x], 1); |
290 |
refine(pl[x+1], 1); |
291 |
} |
292 |
} |
293 |
if (y >= ysiz-1) |
294 |
break; |
295 |
for (x = 0; x < xsiz; x++) { |
296 |
if (dev->inpready || errno == ENOMEM) |
297 |
goto escape; |
298 |
/* |
299 |
* Find super-pixel at this position in next row. |
300 |
*/ |
301 |
p = findrect(pframe.l+((x*hresolu)>>pdepth), |
302 |
pframe.d+(((y+1)*vresolu)>>pdepth), |
303 |
&ptrunk, pdepth); |
304 |
/* |
305 |
* Test super-pixel in next row. |
306 |
*/ |
307 |
if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
308 |
refine(pl[x], 1); |
309 |
refine(p, 1); |
310 |
} |
311 |
/* |
312 |
* Copy into super-pixel array. |
313 |
*/ |
314 |
pl[x] = p; |
315 |
} |
316 |
} |
317 |
escape: |
318 |
free((void *)pl); |
319 |
} |
320 |
|
321 |
|
322 |
int |
323 |
refine( /* refine a node */ |
324 |
PNODE *p, |
325 |
int pd |
326 |
) |
327 |
{ |
328 |
int growth; |
329 |
int mx, my; |
330 |
int i; |
331 |
|
332 |
if (dev->inpready) /* quit for input */ |
333 |
return(0); |
334 |
|
335 |
if (pd <= 0) /* depth limit */ |
336 |
return(0); |
337 |
|
338 |
mx = (p->xmin + p->xmax) >> 1; |
339 |
my = (p->ymin + p->ymax) >> 1; |
340 |
growth = 0; |
341 |
|
342 |
if (p->kid == NULL) { /* subdivide */ |
343 |
|
344 |
if ((p->kid = newptree()) == NULL) |
345 |
return(0); |
346 |
|
347 |
p->kid[UR].xmin = mx; |
348 |
p->kid[UR].ymin = my; |
349 |
p->kid[UR].xmax = p->xmax; |
350 |
p->kid[UR].ymax = p->ymax; |
351 |
p->kid[UL].xmin = p->xmin; |
352 |
p->kid[UL].ymin = my; |
353 |
p->kid[UL].xmax = mx; |
354 |
p->kid[UL].ymax = p->ymax; |
355 |
p->kid[DR].xmin = mx; |
356 |
p->kid[DR].ymin = p->ymin; |
357 |
p->kid[DR].xmax = p->xmax; |
358 |
p->kid[DR].ymax = my; |
359 |
p->kid[DL].xmin = p->xmin; |
360 |
p->kid[DL].ymin = p->ymin; |
361 |
p->kid[DL].xmax = mx; |
362 |
p->kid[DL].ymax = my; |
363 |
/* |
364 |
* The following paint order can leave a black pixel |
365 |
* if redraw() is called in (*dev->paintr)(). |
366 |
*/ |
367 |
if (p->x >= mx && p->y >= my) |
368 |
pcopy(p, p->kid+UR); |
369 |
else if (paint(p->kid+UR) < 0) |
370 |
quit(1); |
371 |
if (p->x < mx && p->y >= my) |
372 |
pcopy(p, p->kid+UL); |
373 |
else if (paint(p->kid+UL) < 0) |
374 |
quit(1); |
375 |
if (p->x >= mx && p->y < my) |
376 |
pcopy(p, p->kid+DR); |
377 |
else if (paint(p->kid+DR) < 0) |
378 |
quit(1); |
379 |
if (p->x < mx && p->y < my) |
380 |
pcopy(p, p->kid+DL); |
381 |
else if (paint(p->kid+DL) < 0) |
382 |
quit(1); |
383 |
|
384 |
growth++; |
385 |
} |
386 |
/* do children */ |
387 |
if (mx > pframe.l) { |
388 |
if (my > pframe.d) |
389 |
growth += refine(p->kid+DL, pd-1); |
390 |
if (my < pframe.u) |
391 |
growth += refine(p->kid+UL, pd-1); |
392 |
} |
393 |
if (mx < pframe.r) { |
394 |
if (my > pframe.d) |
395 |
growth += refine(p->kid+DR, pd-1); |
396 |
if (my < pframe.u) |
397 |
growth += refine(p->kid+UR, pd-1); |
398 |
} |
399 |
/* recompute sum */ |
400 |
if (growth) { |
401 |
setcolor(p->v, 0.0, 0.0, 0.0); |
402 |
for (i = 0; i < 4; i++) |
403 |
addcolor(p->v, p->kid[i].v); |
404 |
scalecolor(p->v, 0.25); |
405 |
} |
406 |
return(growth); |
407 |
} |