| 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 |
* |
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* External symbols declared in rpaint.h |
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*/ |
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|
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#include "copyright.h" |
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|
| 12 |
#include <signal.h> |
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#include <ctype.h> |
| 14 |
|
| 15 |
#include "ray.h" |
| 16 |
#include "rpaint.h" |
| 17 |
|
| 18 |
#define CTRL(c) ((c)-'@') |
| 19 |
|
| 20 |
|
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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; |
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/* 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) { |
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sprintf(errmsg, "cannot initialize %s", dname); |
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error(USER, errmsg); |
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} else |
| 38 |
return; |
| 39 |
} |
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/* not there, try exec */ |
| 41 |
if ((dev = comm_init(dname, id)) == NULL) { |
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sprintf(errmsg, "cannot start device \"%s\"", dname); |
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error(USER, errmsg); |
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} |
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} |
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|
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|
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void |
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devclose(void) /* close our device */ |
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{ |
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if (dev != NULL) |
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(*dev->close)(); |
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dev = NULL; |
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} |
| 55 |
|
| 56 |
|
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void |
| 58 |
printdevices(void) /* print list of output devices */ |
| 59 |
{ |
| 60 |
int i; |
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|
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for (i = 0; devtable[i].name; i++) |
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printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
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} |
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|
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|
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void |
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rview(void) /* do a view */ |
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{ |
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char buf[32]; |
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|
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devopen(dvcname); /* open device */ |
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newimage(NULL); /* start image */ |
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|
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for ( ; ; ) { /* quit in command() */ |
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while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
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command("done: "); |
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errno = 0; |
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if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
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sprintf(buf, "%d sampling...\n", 1<<pdepth); |
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(*dev->comout)(buf); |
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rsample(); |
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} else { |
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sprintf(buf, "%d refining...\n", 1<<pdepth); |
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(*dev->comout)(buf); |
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refine(&ptrunk, pdepth+1); |
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} |
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if (waitrays() < 0) |
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quit(1); |
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if (dev->inpready) /* noticed some input */ |
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command(": "); |
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else /* finished this depth */ |
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pdepth++; |
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} |
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} |
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|
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|
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void |
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command( /* get/execute command */ |
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char *prompt |
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) |
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{ |
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#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
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char inpbuf[256]; |
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char *args; |
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again: |
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(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
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for (args = inpbuf; *args && *args != ' '; args++) |
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; |
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if (*args) *args++ = '\0'; |
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else *++args = '\0'; |
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|
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switch (inpbuf[0]) { |
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case 'f': /* new frame (|focus|free) */ |
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if (badcom("frame")) { |
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if (badcom("focus")) { |
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if (badcom("free")) |
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goto commerr; |
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free_objmem(); |
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break; |
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} |
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getfocus(args); |
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break; |
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} |
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getframe(args); |
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break; |
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case 'v': /* view */ |
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if (badcom("view")) |
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goto commerr; |
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getview(args); |
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break; |
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case 'l': /* last view */ |
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if (badcom("last")) |
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goto commerr; |
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lastview(args); |
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break; |
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case 'V': /* save view */ |
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if (badcom("V")) |
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goto commerr; |
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saveview(args); |
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break; |
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case 'L': /* load view */ |
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if (badcom("L")) |
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goto commerr; |
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loadview(args); |
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break; |
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case 'e': /* exposure */ |
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if (badcom("exposure")) |
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goto commerr; |
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getexposure(args); |
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break; |
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case 's': /* set a parameter */ |
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if (badcom("set")) { |
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#ifdef SIGTSTP |
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if (!badcom("stop")) |
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goto dostop; |
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#endif |
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goto commerr; |
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} |
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setparam(args); |
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break; |
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case 'n': /* new picture */ |
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if (badcom("new")) |
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goto commerr; |
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newimage(args); |
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break; |
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case 't': /* trace a ray */ |
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if (badcom("trace")) |
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goto commerr; |
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traceray(args); |
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break; |
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case 'a': /* aim camera */ |
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if (badcom("aim")) |
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goto commerr; |
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getaim(args); |
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break; |
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case 'm': /* move camera (or memstats) */ |
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if (badcom("move")) |
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#ifdef MSTATS |
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{ |
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if (badcom("memory")) |
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goto commerr; |
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printmemstats(stderr); |
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break; |
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} |
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#else |
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goto commerr; |
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#endif |
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getmove(args); |
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break; |
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case 'r': /* rotate/repaint */ |
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if (badcom("rotate")) { |
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if (badcom("repaint")) { |
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if (badcom("redraw")) |
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goto commerr; |
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redraw(); |
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break; |
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} |
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getrepaint(args); |
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break; |
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} |
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getrotate(args); |
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break; |
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case 'p': /* pivot view */ |
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if (badcom("pivot")) { |
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if (badcom("pause")) |
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goto commerr; |
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goto again; |
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} |
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getpivot(args); |
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break; |
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case CTRL('R'): /* redraw */ |
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redraw(); |
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break; |
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case 'w': /* write */ |
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if (badcom("write")) |
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goto commerr; |
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writepict(args); |
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break; |
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case 'q': /* quit */ |
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if (badcom("quit")) |
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goto commerr; |
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quit(0); |
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case CTRL('C'): /* interrupt */ |
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goto again; |
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#ifdef SIGTSTP |
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case CTRL('Z'):; /* stop */ |
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dostop: |
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devclose(); |
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kill(0, SIGTSTP); |
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/* pc stops here */ |
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devopen(dvcname); |
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redraw(); |
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break; |
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#endif |
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case '\0': /* continue */ |
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break; |
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default:; |
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commerr: |
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if (iscntrl(inpbuf[0])) |
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sprintf(errmsg, "^%c: unknown control", |
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inpbuf[0]|0100); |
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else |
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sprintf(errmsg, "%s: unknown command", inpbuf); |
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error(COMMAND, errmsg); |
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break; |
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} |
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#undef badcom |
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} |
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|
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|
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void |
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rsample(void) /* sample the image */ |
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{ |
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int xsiz, ysiz, y; |
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PNODE *p; |
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PNODE **pl; |
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int x; |
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/* |
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* We initialize the bottom row in the image at our current |
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* resolution. During sampling, we check super-pixels to the |
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* right and above by calling bigdiff(). If there is a significant |
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* difference, we subsample the super-pixels. The testing process |
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* includes initialization of the next row. |
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*/ |
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xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
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ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
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pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
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if (pl == NULL) |
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return; |
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/* |
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* Initialize the bottom row. |
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*/ |
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pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth); |
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for (x = 1; x < xsiz; x++) { |
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pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
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pframe.d, &ptrunk, pdepth); |
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} |
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/* sample the image */ |
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for (y = 0; /* y < ysiz */ ; y++) { |
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for (x = 0; x < xsiz-1; x++) { |
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if (dev->inpready || errno == ENOMEM) |
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goto escape; |
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/* |
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* Test super-pixel to the right. |
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*/ |
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if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
| 288 |
pl[x+1]->v, maxdiff)) { |
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refine(pl[x], 1); |
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refine(pl[x+1], 1); |
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} |
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} |
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if (y >= ysiz-1) |
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break; |
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for (x = 0; x < xsiz; x++) { |
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if (dev->inpready || errno == ENOMEM) |
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goto escape; |
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/* |
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* Find super-pixel at this position in next row. |
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*/ |
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p = findrect(pframe.l+((x*hresolu)>>pdepth), |
| 302 |
pframe.d+(((y+1)*vresolu)>>pdepth), |
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&ptrunk, pdepth); |
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/* |
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* Test super-pixel in next row. |
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*/ |
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if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
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refine(pl[x], 1); |
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refine(p, 1); |
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} |
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/* |
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* Copy into super-pixel array. |
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*/ |
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pl[x] = p; |
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} |
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} |
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escape: |
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free((void *)pl); |
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} |
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|
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|
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int |
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refine( /* refine a node */ |
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PNODE *p, |
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int pd |
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) |
| 327 |
{ |
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int growth; |
| 329 |
int mx, my; |
| 330 |
int i; |
| 331 |
|
| 332 |
if (dev->inpready) /* quit for input */ |
| 333 |
return(0); |
| 334 |
|
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if (pd <= 0) /* depth limit */ |
| 336 |
return(0); |
| 337 |
|
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mx = (p->xmin + p->xmax) >> 1; |
| 339 |
my = (p->ymin + p->ymax) >> 1; |
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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 |
} |
