src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.46 2007/08/22 17:49:54 greg Exp $";
#endif
/*
 * Generate sections of a picture.
 */
 

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#ifndef NON_POSIX /* XXX need abstraction for process management */
 #include <sys/wait.h>
#endif

#include "platform.h"
#include "standard.h"
#include "color.h"
#include "view.h"
#include "rtprocess.h"

#ifndef F_SETLKW

int
main(
        int argc,
        char *argv[]
)
{
        fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
        exit(1);
}

#else

#ifndef NFS
#define  NFS                    1
#endif
                                /* set the following to 0 to forgo forking */
#ifndef MAXFORK
#if NFS
#define  MAXFORK                3       /* allotment of duped processes */
#else
#define  MAXFORK                0
#endif
#endif
                                        /* protection from SYSV signals(!) */
#if defined(sgi)
#define guard_io()      sighold(SIGALRM)
#define unguard()       sigrelse(SIGALRM)
#endif
#ifndef guard_io
#define guard_io()      
#define unguard()       
#endif

extern char  *strerror();

                                /* rpict command */
char  *rpargv[128] = {"rpict", "-S", "1"};
int  rpargc = 3;
FILE  *torp, *fromrp;
COLR  *pbuf;
                                /* our view parameters */
VIEW  ourview = STDVIEW;
double  pixaspect = 1.0;
int  hres = 1024, vres = 1024, hmult = 4, vmult = 4;
                                /* output file */
char  *outfile = NULL;
int  outfd;
long  scanorig;
FILE  *syncfp = NULL;           /* synchronization file pointer */
int  synclst = F_UNLCK;         /* synchronization file lock status */
int  nforked = 0;

#define  sflock(t)      if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)

char  *progname;
int  verbose = 0;
unsigned  timelim = 0;
int  rvrlim = -1;

int  gotalrm = 0;
void  onalrm(int i) { gotalrm++; }

static void dolock(int  fd, int  ltyp);
static void init(int  ac, char  **av);
static int nextpiece(int        *xp, int        *yp);
static int rvrpiece(int *xp, int        *yp);
static int cleanup(int  rstat);
static void rpiece(void);
static int putpiece(int xpos, int       ypos);
static void filerr(char  *t);


int
main(
        int  argc,
        char  *argv[]
)
{
        register int  i, rval;
        
        progname = argv[0];
        for (i = 1; i < argc; i++) {
                                                /* expand arguments */
                while ((rval = expandarg(&argc, &argv, i)) > 0)
                        ;
                if (rval < 0) {
                        fprintf(stderr, "%s: cannot expand '%s'",
                                        argv[0], argv[i]);
                        exit(1);
                }
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'v':
                                switch (argv[i][2]) {
                                case '\0':      /* verbose option */
                                        verbose = !verbose;
                                        continue;
                                case 'f':       /* view file */
                                        if (viewfile(argv[++i], &ourview, NULL) <= 0) {
                                                fprintf(stderr,
                                        "%s: not a view file\n", argv[i]);
                                                exit(1);
                                        }
                                        continue;
                                default:        /* view option? */
                                        rval = getviewopt(&ourview, argc-i, argv+i);
                                        if (rval >= 0) {
                                                i += rval;
                                                continue;
                                        }
                                        break;
                                }
                                break;
                        case 'p':               /* pixel aspect ratio? */
                                if (argv[i][2] != 'a' || argv[i][3])
                                        break;
                                pixaspect = atof(argv[++i]);
                                continue;
                        case 'T':               /* time limit (hours) */
                                if (argv[i][2])
                                        break;
                                timelim = atof(argv[++i])*3600. + .5;
                                break;
                        case 'x':               /* overall x resolution */
                                if (argv[i][2])
                                        break;
                                hres = atoi(argv[++i]);
                                continue;
                        case 'y':               /* overall y resolution */
                                if (argv[i][2])
                                        break;
                                vres = atoi(argv[++i]);
                                continue;
                        case 'X':               /* horizontal multiplier */
                                if (argv[i][2])
                                        break;
                                hmult = atoi(argv[++i]);
                                continue;
                        case 'Y':               /* vertical multiplier */
                                if (argv[i][2])
                                        break;
                                vmult = atoi(argv[++i]);
                                continue;
                        case 'R':               /* recover */
                                if (argv[i][2])
                                        break;
                                rvrlim = 0;
                        /* fall through */
                        case 'F':               /* syncronization file */
                                if (argv[i][2])
                                        break;
                                if ((syncfp =
                fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
                                        fprintf(stderr, "%s: cannot open\n",
                                                        argv[i]);
                                        exit(1);
                                }
                                continue;
                        case 'z':               /* z-file ist verbotten */
                                fprintf(stderr, "%s: -z option not allowed\n",
                                                argv[0]);
                                exit(1);
                        case 'o':               /* output file */
                                if (argv[i][2])
                                        break;
                                outfile = argv[++i];
                                continue;
                        } else if (i >= argc-1)
                                break;
                rpargv[rpargc++] = argv[i];
        }
        if (i >= argc) {
                fprintf(stderr, "%s: missing octree argument\n", argv[0]);
                exit(1);
        }
        if (outfile == NULL) {
                fprintf(stderr, "%s: missing output file\n", argv[0]);
                exit(1);
        }
        init(argc, argv);
        rpiece();
        exit(cleanup(0));
}


static void
dolock(         /* lock or unlock a file */
        int  fd,
        int  ltyp
)
{
        static struct flock  fls;       /* static so initialized to zeroes */

        fls.l_type = ltyp;
        if (fcntl(fd, F_SETLKW, &fls) < 0) {
                fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
                                progname, strerror(errno));
                exit(1);
        }
}


static void
init(                   /* set up output file and start rpict */
        int  ac,
        char  **av
)
{
        static char  hrbuf[16], vrbuf[16];
        extern char  VersionID[];
        char  *err;
        FILE  *fp;
        int  hr, vr;
        SUBPROC  rpd; /* since we don't close_process(), this can be local */
                                        /* set up view */
        if ((err = setview(&ourview)) != NULL) {
                fprintf(stderr, "%s: %s\n", progname, err);
                exit(1);
        }
        if (syncfp != NULL) {
                sflock(F_RDLCK);
                fscanf(syncfp, "%d %d", &hmult, &vmult);
                sflock(F_UNLCK);
        }
                                        /* compute piece size */
        hres /= hmult;
        vres /= vmult;
        if (hres <= 0 || vres <= 0) {
                fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
                exit(1);
        }
        normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
        sprintf(hrbuf, "%d", hres);
        rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
        sprintf(vrbuf, "%d", vres);
        rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
        rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
        rpargv[rpargc++] = av[ac-1];
        rpargv[rpargc] = NULL;
                                        /* open output file */
        if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) {
                dolock(outfd, F_WRLCK);
                if ((fp = fdopen(dup(outfd), "w")) == NULL)
                        goto filerr;
                newheader("RADIANCE", fp);      /* create header */
                printargs(ac, av, fp);
                fprintf(fp, "SOFTWARE= %s\n", VersionID);
                fputs(VIEWSTR, fp);
                fprintview(&ourview, fp);
                putc('\n', fp);
                if (pixaspect < .99 || pixaspect > 1.01)
                        fputaspect(pixaspect, fp);
                fputformat(COLRFMT, fp);
                putc('\n', fp);
                fprtresolu(hres*hmult, vres*vmult, fp);
        } else if ((outfd = open(outfile, O_RDWR)) >= 0) {
                dolock(outfd, F_RDLCK);
                if ((fp = fdopen(dup(outfd), "r+")) == NULL)
                        goto filerr;
                getheader(fp, NULL, NULL);      /* skip header */
                if (!fscnresolu(&hr, &vr, fp) ||        /* check resolution */
                                hr != hres*hmult || vr != vres*vmult) {
                        fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
                                        progname, outfile);
                        exit(1);
                }
        } else {
                fprintf(stderr, "%s: cannot open file \"%s\"\n",
                                progname, outfile);
                exit(1);
        }
        scanorig = ftell(fp);           /* record position of first scanline */
        if (fclose(fp) == -1)           /* done with stream i/o */
                goto filerr;
        dolock(outfd, F_UNLCK);
                                        /* start rpict process */
        if (open_process(&rpd, rpargv) <= 0) {
                fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
                exit(1);
        }
        if ((fromrp = fdopen(rpd.r, "r")) == NULL ||
                        (torp = fdopen(rpd.w, "w")) == NULL) {
                fprintf(stderr, "%s: cannot open stream to %s\n",
                                progname, rpargv[0]);
                exit(1);
        }
        if ((pbuf = (COLR *)bmalloc(hres*vres*sizeof(COLR))) == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                exit(1);
        }
        signal(SIGALRM, onalrm);
        if (timelim)
                alarm(timelim);
        return;
filerr:
        fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
        exit(1);
}


static int
nextpiece(              /* get next piece assignment */
        int     *xp,
        int     *yp
)
{
        if (gotalrm)                    /* someone wants us to quit */
                return(0);
        if (syncfp != NULL) {           /* use sync file */
                /*
                 * So we don't necessarily have to lock and unlock the file
                 * multiple times (very slow), we establish an exclusive
                 * lock at the beginning on our synchronization file and
                 * maintain it in the subroutine rvrpiece().
                 */
                sflock(F_WRLCK);
                fseek(syncfp, 0L, 0);           /* read position */
                if (fscanf(syncfp, "%*d %*d %d %d", xp, yp) < 2) {
                        *xp = hmult-1;
                        *yp = vmult;
                }
                if (rvrlim == 0)                /* initialize recovery limit */
                        rvrlim = *xp*vmult + *yp;
                if (rvrpiece(xp, yp)) {         /* do stragglers first */
                        sflock(F_UNLCK);
                        return(1);
                }
                if (--(*yp) < 0) {              /* decrement position */
                        *yp = vmult-1;
                        if (--(*xp) < 0) {      /* all done */
                                sflock(F_UNLCK);
                                return(0);
                        }
                }
                fseek(syncfp, 0L, 0);           /* write new position */
                fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, *xp, *yp);
                fflush(syncfp);
                sflock(F_UNLCK);                /* release sync file */
                return(1);
        }
        return(scanf("%d %d", xp, yp) == 2);    /* use stdin */
}


static int
rvrpiece(               /* check for recoverable pieces */
        register int    *xp,
        register int    *yp
)
{
        static char  *pdone = NULL;     /* which pieces are done */
        static long  readpos = -1;      /* how far we've read */
        register int  i;
        /*
         * This routine is called by nextpiece() with an
         * exclusive lock on syncfp and the file pointer at the
         * appropriate position to read in the finished pieces.
         */
        if (rvrlim < 0)
                return(0);              /* only check if asked */
        if (pdone == NULL)              /* first call */
                pdone = calloc(hmult*vmult, sizeof(char));
        if (pdone == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                exit(1);
        }
        if (readpos != -1)              /* mark what's been done */
                fseek(syncfp, readpos, 0);
        while (fscanf(syncfp, "%d %d", xp, yp) == 2)
                pdone[*xp*vmult+*yp] = 1;
        if (!feof(syncfp)) {
                fprintf(stderr, "%s: format error in sync file\n", progname);
                exit(1);
        }
        readpos = ftell(syncfp);
        i = hmult*vmult;                /* find an unaccounted for piece */
        while (i-- > rvrlim)
                if (!pdone[i]) {
                        *xp = i / vmult;
                        *yp = i % vmult;
                        pdone[i] = 1;   /* consider it done */
                        return(1);
                }
        rvrlim = -1;                    /* nothing left to recover */
        free(pdone);
        pdone = NULL;
        return(0);
}


static int
cleanup(                        /* close rpict process and clean up */
        int  rstat
)
{
        int  status;

        bfree((char *)pbuf, hres*vres*sizeof(COLR));
        fclose(torp);
        fclose(fromrp);
        while (wait(&status) != -1)
                if (rstat == 0)
                        rstat = status>>8 & 0xff;
        return(rstat);
}


static void
rpiece(void)                    /* render picture piece by piece */
{
        VIEW  pview;
        int  xorg, yorg;
                                        /* compute view parameters */
        pview = ourview;
        switch (ourview.type) {
        case VT_PER:
                pview.horiz = 2.*180./PI*atan(
                                tan(PI/180./2.*ourview.horiz)/hmult );
                pview.vert = 2.*180./PI*atan(
                                tan(PI/180./2.*ourview.vert)/vmult );
                break;
        case VT_PAR:
        case VT_ANG:
                pview.horiz = ourview.horiz / hmult;
                pview.vert = ourview.vert / vmult;
                break;
        case VT_CYL:
                pview.horiz = ourview.horiz / hmult;
                pview.vert = 2.*180./PI*atan(
                                tan(PI/180./2.*ourview.vert)/vmult );
                break;
        case VT_HEM:
                pview.horiz = 2.*180./PI*asin(
                                sin(PI/180./2.*ourview.horiz)/hmult );
                pview.vert = 2.*180./PI*asin(
                                sin(PI/180./2.*ourview.vert)/vmult );
                break;
        default:
                fprintf(stderr, "%s: unknown view type '-vt%c'\n",
                                progname, ourview.type);
                exit(cleanup(1));
        }
                                        /* render each piece */
        while (nextpiece(&xorg, &yorg)) {
                pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1);
                pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1);
                fputs(VIEWSTR, torp);
                fprintview(&pview, torp);
                putc('\n', torp);
                fflush(torp);                   /* assigns piece to rpict */
                putpiece(xorg, yorg);           /* place piece in output */
        }
}


static int
putpiece(               /* get next piece from rpict */
int     xpos,
int     ypos
)
{
        struct flock  fls;
        int  pid, status;
        int  hr, vr;
        register int  y;
                                /* check bounds */
        if ((xpos < 0) | (ypos < 0) | (xpos >= hmult) | (ypos >= vmult)) {
                fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
                                progname, xpos, ypos);
                exit(cleanup(1));
        }
                                /* check header from rpict */
        guard_io();
        getheader(fromrp, NULL, NULL);
        if (!fscnresolu(&hr, &vr, fromrp) || (hr != hres) | (vr != vres)) {
                fprintf(stderr, "%s: resolution mismatch from %s\n",
                                progname, rpargv[0]);
                exit(cleanup(1));
        }
        if (verbose) {                          /* notify caller */
                printf("%d %d begun\n", xpos, ypos);
                fflush(stdout);
        }
        unguard();
                                /* load new piece into buffer */
        for (y = 0; y < vr; y++) {
                guard_io();
                if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
                        fprintf(stderr, "%s: read error from %s\n",
                                        progname, rpargv[0]);
                        exit(cleanup(1));
                }
                unguard();
        }
#if MAXFORK
                                /* fork so we don't slow rpict down */
        if ((pid = fork()) > 0) {
                if (++nforked >= MAXFORK) {
                        wait(&status);          /* reap a child */
                        if (status)
                                exit(cleanup(status>>8 & 0xff));
                        nforked--;
                }
                return(pid);
        }
#else
        pid = -1;               /* no forking */
#endif
        fls.l_start = scanorig +
                ((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR);
#if NFS
        fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR);
                                /* lock file section so NFS doesn't mess up */
        fls.l_whence = 0;
        fls.l_type = F_WRLCK;
        if (fcntl(outfd, F_SETLKW, &fls) < 0)
                filerr("lock");
#endif
                                /* write new piece to file */
        if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
                filerr("seek");
        if (hmult == 1) {
                if (writebuf(outfd, (char *)pbuf,
                                vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR))
                        filerr("write");
        } else
                for (y = 0; y < vr; y++) {
                        if (writebuf(outfd, (char *)(pbuf+y*hr),
                                        hr*sizeof(COLR)) != hr*sizeof(COLR))
                                filerr("write");
                        if (y < vr-1 && lseek(outfd,
                                        (off_t)(hmult-1)*hr*sizeof(COLR),
                                        SEEK_CUR) < 0)
                                filerr("seek");
                }
#if NFS
        fls.l_type = F_UNLCK;           /* release lock */
        if (fcntl(outfd, F_SETLKW, &fls) < 0)
                filerr("lock");
#endif
        if (verbose) {                          /* notify caller */
                printf("%d %d done\n", xpos, ypos);
                fflush(stdout);
        }
        if (syncfp != NULL) {                   /* record what's been done */
                sflock(F_WRLCK);
                fseek(syncfp, 0L, 2);           /* append index */
                fprintf(syncfp, "%4d %4d\n", xpos, ypos);
                fflush(syncfp);
                                /*** Unlock not necessary, since
                sflock(F_UNLCK);        _exit() or nextpiece() is next ***/
        }
        if (pid == -1)          /* didn't fork or fork failed */
                return(0);
        _exit(0);               /* else exit child process (releasing locks) */
}


static void
filerr(                 /* report file error and exit */
        char  *t
)
{
        fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
                        progname, t, outfile, strerror(errno));
        _exit(1);
}

#endif
Revision:	2.47
Committed:	Wed Aug 22 18:46:36 2007 UTC (16 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.46:	+2 -2 lines
Log Message:	Fixed bug in bug fix...
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.47	static const char RCSid[] = "$Id: rpiece.c,v 2.46 2007/08/22 17:49:54 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Generate sections of a picture.
6			*/
7
8	schorsch	2.43
9			#include <stdio.h>
10			#include <signal.h>
11			#include <sys/types.h>
12	schorsch	2.45	#ifndef NON_POSIX /* XXX need abstraction for process management */
13			#include <sys/wait.h>
14			#endif
15	schorsch	2.43
16	greg	2.42	#include "platform.h"
17	greg	2.44	#include "standard.h"
18	schorsch	2.43	#include "color.h"
19			#include "view.h"
20			#include "rtprocess.h"
21	greg	2.16
22			#ifndef F_SETLKW
23
24	schorsch	2.43	int
25			main(
26			int argc,
27			char *argv[]
28			)
29	greg	2.16	{
30			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
31			exit(1);
32			}
33
34			#else
35
36	greg	2.12	#ifndef NFS
37			#define NFS 1
38			#endif
39	greg	2.9	/* set the following to 0 to forgo forking */
40			#ifndef MAXFORK
41	greg	2.12	#if NFS
42	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
43	greg	2.12	#else
44			#define MAXFORK 0
45	greg	2.9	#endif
46	greg	2.12	#endif
47	greg	2.18	/* protection from SYSV signals(!) */
48	greg	2.27	#if defined(sgi)
49	greg	2.18	#define guard_io() sighold(SIGALRM)
50			#define unguard() sigrelse(SIGALRM)
51			#endif
52			#ifndef guard_io
53	schorsch	2.43	#define guard_io()
54			#define unguard()
55	greg	2.18	#endif
56	gregl	2.34
57	greg	2.37	extern char *strerror();
58	gregl	2.34
59	greg	2.1	/* rpict command */
60	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
61			int rpargc = 3;
62	greg	2.1	FILE torp, fromrp;
63	greg	2.8	COLR *pbuf;
64	greg	2.1	/* our view parameters */
65			VIEW ourview = STDVIEW;
66	greg	2.4	double pixaspect = 1.0;
67	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
68	greg	2.1	/* output file */
69			char *outfile = NULL;
70			int outfd;
71			long scanorig;
72	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
73			int synclst = F_UNLCK; /* synchronization file lock status */
74	greg	2.9	int nforked = 0;
75	greg	2.1
76	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
77
78	greg	2.1	char *progname;
79			int verbose = 0;
80	greg	2.31	unsigned timelim = 0;
81	greg	2.25	int rvrlim = -1;
82	greg	2.1
83	greg	2.6	int gotalrm = 0;
84	schorsch	2.38	void onalrm(int i) { gotalrm++; }
85	greg	2.1
86	schorsch	2.43	static void dolock(int fd, int ltyp);
87			static void init(int ac, char **av);
88			static int nextpiece(int xp, int yp);
89			static int rvrpiece(int xp, int yp);
90			static int cleanup(int rstat);
91			static void rpiece(void);
92			static int putpiece(int xpos, int ypos);
93			static void filerr(char *t);
94	greg	2.6
95	schorsch	2.43
96			int
97			main(
98			int argc,
99			char *argv[]
100			)
101	greg	2.1	{
102			register int i, rval;
103
104			progname = argv[0];
105			for (i = 1; i < argc; i++) {
106	greg	2.22	/* expand arguments */
107	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
108			;
109			if (rval < 0) {
110			fprintf(stderr, "%s: cannot expand '%s'",
111			argv[0], argv[i]);
112			exit(1);
113			}
114	greg	2.1	if (argv[i][0] == '-')
115			switch (argv[i][1]) {
116			case 'v':
117			switch (argv[i][2]) {
118			case '\0': /* verbose option */
119			verbose = !verbose;
120			continue;
121			case 'f': /* view file */
122			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
123			fprintf(stderr,
124			"%s: not a view file\n", argv[i]);
125			exit(1);
126			}
127			continue;
128			default: /* view option? */
129			rval = getviewopt(&ourview, argc-i, argv+i);
130			if (rval >= 0) {
131			i += rval;
132			continue;
133			}
134			break;
135			}
136			break;
137			case 'p': /* pixel aspect ratio? */
138	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
139			break;
140	gregl	2.35	pixaspect = atof(argv[++i]);
141	greg	2.23	continue;
142	greg	2.31	case 'T': /* time limit (hours) */
143			if (argv[i][2])
144			break;
145			timelim = atof(argv[++i])*3600. + .5;
146			break;
147	greg	2.23	case 'x': /* overall x resolution */
148			if (argv[i][2])
149			break;
150			hres = atoi(argv[++i]);
151			continue;
152			case 'y': /* overall y resolution */
153			if (argv[i][2])
154			break;
155			vres = atoi(argv[++i]);
156			continue;
157	greg	2.1	case 'X': /* horizontal multiplier */
158			if (argv[i][2])
159			break;
160			hmult = atoi(argv[++i]);
161			continue;
162			case 'Y': /* vertical multiplier */
163			if (argv[i][2])
164			break;
165			vmult = atoi(argv[++i]);
166			continue;
167	greg	2.25	case 'R': /* recover */
168			if (argv[i][2])
169			break;
170			rvrlim = 0;
171			/* fall through */
172	greg	2.5	case 'F': /* syncronization file */
173			if (argv[i][2])
174			break;
175	greg	2.28	if ((syncfp =
176			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
177	greg	2.5	fprintf(stderr, "%s: cannot open\n",
178			argv[i]);
179			exit(1);
180			}
181			continue;
182	greg	2.15	case 'z': /* z-file ist verbotten */
183			fprintf(stderr, "%s: -z option not allowed\n",
184			argv[0]);
185			exit(1);
186	greg	2.1	case 'o': /* output file */
187			if (argv[i][2])
188			break;
189			outfile = argv[++i];
190			continue;
191	greg	2.23	} else if (i >= argc-1)
192			break;
193	greg	2.1	rpargv[rpargc++] = argv[i];
194			}
195	greg	2.23	if (i >= argc) {
196			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
197			exit(1);
198			}
199	greg	2.1	if (outfile == NULL) {
200			fprintf(stderr, "%s: missing output file\n", argv[0]);
201			exit(1);
202			}
203			init(argc, argv);
204			rpiece();
205	greg	2.15	exit(cleanup(0));
206	greg	2.1	}
207
208
209	schorsch	2.43	static void
210			dolock( /* lock or unlock a file */
211			int fd,
212			int ltyp
213			)
214	greg	2.25	{
215			static struct flock fls; /* static so initialized to zeroes */
216
217			fls.l_type = ltyp;
218			if (fcntl(fd, F_SETLKW, &fls) < 0) {
219	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
220	greg	2.37	progname, strerror(errno));
221	greg	2.25	exit(1);
222			}
223			}
224
225
226	schorsch	2.43	static void
227			init( /* set up output file and start rpict */
228			int ac,
229			char **av
230			)
231	greg	2.1	{
232	greg	2.23	static char hrbuf[16], vrbuf[16];
233	greg	2.2	extern char VersionID[];
234	greg	2.1	char *err;
235			FILE *fp;
236			int hr, vr;
237	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
238	greg	2.1	/* set up view */
239			if ((err = setview(&ourview)) != NULL) {
240			fprintf(stderr, "%s: %s\n", progname, err);
241			exit(1);
242			}
243	greg	2.25	if (syncfp != NULL) {
244			sflock(F_RDLCK);
245			fscanf(syncfp, "%d %d", &hmult, &vmult);
246			sflock(F_UNLCK);
247	greg	2.5	}
248	greg	2.23	/* compute piece size */
249			hres /= hmult;
250			vres /= vmult;
251	greg	2.46	if (hres <= 0 \|\| vres <= 0) {
252	greg	2.47	fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
253	greg	2.46	exit(1);
254			}
255	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
256	greg	2.23	sprintf(hrbuf, "%d", hres);
257			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
258			sprintf(vrbuf, "%d", vres);
259			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
260			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
261			rpargv[rpargc++] = av[ac-1];
262			rpargv[rpargc] = NULL;
263	greg	2.1	/* open output file */
264			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
265	greg	2.25	dolock(outfd, F_WRLCK);
266	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
267			goto filerr;
268	greg	2.29	newheader("RADIANCE", fp); /* create header */
269			printargs(ac, av, fp);
270	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
271	greg	2.1	fputs(VIEWSTR, fp);
272			fprintview(&ourview, fp);
273			putc('\n', fp);
274			if (pixaspect < .99 \|\| pixaspect > 1.01)
275			fputaspect(pixaspect, fp);
276			fputformat(COLRFMT, fp);
277			putc('\n', fp);
278			fprtresolu(hreshmult, vresvmult, fp);
279			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
280	greg	2.25	dolock(outfd, F_RDLCK);
281	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
282			goto filerr;
283	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
284	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
285	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
286	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
287			progname, outfile);
288	greg	2.1	exit(1);
289			}
290			} else {
291	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
292			progname, outfile);
293	greg	2.1	exit(1);
294			}
295			scanorig = ftell(fp); /* record position of first scanline */
296			if (fclose(fp) == -1) /* done with stream i/o */
297			goto filerr;
298	greg	2.25	dolock(outfd, F_UNLCK);
299	greg	2.1	/* start rpict process */
300	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
301	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
302	greg	2.1	exit(1);
303			}
304	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
305			(torp = fdopen(rpd.w, "w")) == NULL) {
306	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
307			progname, rpargv[0]);
308			exit(1);
309			}
310	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
311	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
312			exit(1);
313			}
314	greg	2.6	signal(SIGALRM, onalrm);
315	greg	2.31	if (timelim)
316			alarm(timelim);
317	greg	2.1	return;
318			filerr:
319	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
320	greg	2.1	exit(1);
321			}
322
323
324	schorsch	2.43	static int
325			nextpiece( /* get next piece assignment */
326			int *xp,
327			int *yp
328			)
329	greg	2.5	{
330	greg	2.6	if (gotalrm) /* someone wants us to quit */
331			return(0);
332	greg	2.25	if (syncfp != NULL) { /* use sync file */
333			/*
334			* So we don't necessarily have to lock and unlock the file
335			* multiple times (very slow), we establish an exclusive
336			* lock at the beginning on our synchronization file and
337			* maintain it in the subroutine rvrpiece().
338			*/
339			sflock(F_WRLCK);
340			fseek(syncfp, 0L, 0); /* read position */
341			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
342	greg	2.8	*xp = hmult-1;
343			*yp = vmult;
344			}
345	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
346			rvrlim = xpvmult + *yp;
347			if (rvrpiece(xp, yp)) { /* do stragglers first */
348			sflock(F_UNLCK);
349			return(1);
350			}
351	greg	2.8	if (--(yp) < 0) { / decrement position */
352	greg	2.5	*yp = vmult-1;
353	greg	2.25	if (--(xp) < 0) { / all done */
354			sflock(F_UNLCK);
355	greg	2.5	return(0);
356			}
357			}
358	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
359			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
360			fflush(syncfp);
361			sflock(F_UNLCK); /* release sync file */
362	greg	2.5	return(1);
363			}
364	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
365	greg	2.5	}
366
367
368	schorsch	2.43	static int
369			rvrpiece( /* check for recoverable pieces */
370			register int *xp,
371			register int *yp
372			)
373	greg	2.25	{
374			static char pdone = NULL; / which pieces are done */
375			static long readpos = -1; /* how far we've read */
376			register int i;
377			/*
378			* This routine is called by nextpiece() with an
379			* exclusive lock on syncfp and the file pointer at the
380			* appropriate position to read in the finished pieces.
381			*/
382			if (rvrlim < 0)
383			return(0); /* only check if asked */
384			if (pdone == NULL) /* first call */
385			pdone = calloc(hmult*vmult, sizeof(char));
386	greg	2.30	if (pdone == NULL) {
387			fprintf(stderr, "%s: out of memory\n", progname);
388			exit(1);
389			}
390	greg	2.25	if (readpos != -1) /* mark what's been done */
391			fseek(syncfp, readpos, 0);
392			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
393			pdone[xpvmult+*yp] = 1;
394			if (!feof(syncfp)) {
395			fprintf(stderr, "%s: format error in sync file\n", progname);
396			exit(1);
397			}
398			readpos = ftell(syncfp);
399			i = hmultvmult; / find an unaccounted for piece */
400			while (i-- > rvrlim)
401			if (!pdone[i]) {
402			*xp = i / vmult;
403			*yp = i % vmult;
404			pdone[i] = 1; /* consider it done */
405			return(1);
406			}
407			rvrlim = -1; /* nothing left to recover */
408			free(pdone);
409			pdone = NULL;
410			return(0);
411			}
412
413
414	schorsch	2.43	static int
415			cleanup( /* close rpict process and clean up */
416			int rstat
417			)
418	greg	2.1	{
419	greg	2.10	int status;
420	greg	2.1
421	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
422	greg	2.1	fclose(torp);
423			fclose(fromrp);
424	greg	2.10	while (wait(&status) != -1)
425	greg	2.9	if (rstat == 0)
426			rstat = status>>8 & 0xff;
427			return(rstat);
428	greg	2.1	}
429
430
431	schorsch	2.43	static void
432			rpiece(void) /* render picture piece by piece */
433	greg	2.1	{
434			VIEW pview;
435			int xorg, yorg;
436	greg	2.11	/* compute view parameters */
437	schorsch	2.40	pview = ourview;
438	greg	2.11	switch (ourview.type) {
439			case VT_PER:
440			pview.horiz = 2.180./PIatan(
441			tan(PI/180./2.*ourview.horiz)/hmult );
442			pview.vert = 2.180./PIatan(
443			tan(PI/180./2.*ourview.vert)/vmult );
444			break;
445			case VT_PAR:
446			case VT_ANG:
447			pview.horiz = ourview.horiz / hmult;
448			pview.vert = ourview.vert / vmult;
449			break;
450	greg	2.32	case VT_CYL:
451			pview.horiz = ourview.horiz / hmult;
452			pview.vert = 2.180./PIatan(
453			tan(PI/180./2.*ourview.vert)/vmult );
454			break;
455	greg	2.11	case VT_HEM:
456			pview.horiz = 2.180./PIasin(
457			sin(PI/180./2.*ourview.horiz)/hmult );
458			pview.vert = 2.180./PIasin(
459			sin(PI/180./2.*ourview.vert)/vmult );
460			break;
461			default:
462			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
463			progname, ourview.type);
464			exit(cleanup(1));
465			}
466			/* render each piece */
467	greg	2.5	while (nextpiece(&xorg, &yorg)) {
468	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
469			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
470	greg	2.1	fputs(VIEWSTR, torp);
471			fprintview(&pview, torp);
472			putc('\n', torp);
473	greg	2.11	fflush(torp); /* assigns piece to rpict */
474	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
475			}
476			}
477
478
479	schorsch	2.43	static int
480			putpiece( /* get next piece from rpict */
481			int xpos,
482			int ypos
483			)
484	greg	2.1	{
485	greg	2.7	struct flock fls;
486	greg	2.9	int pid, status;
487	greg	2.1	int hr, vr;
488	greg	2.8	register int y;
489			/* check bounds */
490	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
491	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
492			progname, xpos, ypos);
493	greg	2.10	exit(cleanup(1));
494	greg	2.5	}
495	greg	2.8	/* check header from rpict */
496	greg	2.18	guard_io();
497	greg	2.13	getheader(fromrp, NULL, NULL);
498	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
499	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
500			progname, rpargv[0]);
501	greg	2.10	exit(cleanup(1));
502	greg	2.1	}
503	greg	2.24	if (verbose) { /* notify caller */
504			printf("%d %d begun\n", xpos, ypos);
505			fflush(stdout);
506			}
507	greg	2.18	unguard();
508	greg	2.8	/* load new piece into buffer */
509	greg	2.18	for (y = 0; y < vr; y++) {
510			guard_io();
511	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
512	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
513			progname, rpargv[0]);
514	greg	2.10	exit(cleanup(1));
515	greg	2.1	}
516	greg	2.18	unguard();
517			}
518	greg	2.9	#if MAXFORK
519			/* fork so we don't slow rpict down */
520			if ((pid = fork()) > 0) {
521	greg	2.10	if (++nforked >= MAXFORK) {
522	greg	2.9	wait(&status); /* reap a child */
523			if (status)
524	greg	2.10	exit(cleanup(status>>8 & 0xff));
525	greg	2.9	nforked--;
526			}
527			return(pid);
528			}
529			#else
530			pid = -1; /* no forking */
531			#endif
532	greg	2.19	fls.l_start = scanorig +
533			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
534	greg	2.12	#if NFS
535	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
536	greg	2.8	/* lock file section so NFS doesn't mess up */
537			fls.l_whence = 0;
538			fls.l_type = F_WRLCK;
539	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
540			filerr("lock");
541	greg	2.12	#endif
542	greg	2.8	/* write new piece to file */
543	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
544	greg	2.26	filerr("seek");
545	greg	2.9	if (hmult == 1) {
546			if (writebuf(outfd, (char *)pbuf,
547			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
548	greg	2.26	filerr("write");
549	greg	2.9	} else
550			for (y = 0; y < vr; y++) {
551			if (writebuf(outfd, (char )(pbuf+yhr),
552			hrsizeof(COLR)) != hrsizeof(COLR))
553	greg	2.26	filerr("write");
554	greg	2.9	if (y < vr-1 && lseek(outfd,
555	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
556	greg	2.42	SEEK_CUR) < 0)
557	greg	2.26	filerr("seek");
558	greg	2.1	}
559	greg	2.25	#if NFS
560			fls.l_type = F_UNLCK; /* release lock */
561	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
562			filerr("lock");
563	greg	2.25	#endif
564	greg	2.32	if (verbose) { /* notify caller */
565			printf("%d %d done\n", xpos, ypos);
566			fflush(stdout);
567			}
568	greg	2.25	if (syncfp != NULL) { /* record what's been done */
569			sflock(F_WRLCK);
570			fseek(syncfp, 0L, 2); /* append index */
571			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
572			fflush(syncfp);
573			/*** Unlock not necessary, since
574			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
575	greg	2.20	}
576	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
577	greg	2.9	return(0);
578	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
579	greg	2.26	}
580
581
582	schorsch	2.43	static void
583			filerr( /* report file error and exit */
584			char *t
585			)
586	greg	2.26	{
587			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
588	greg	2.37	progname, t, outfile, strerror(errno));
589	greg	2.9	_exit(1);
590	greg	2.1	}
591	greg	2.16
592			#endif