src/util/rpiece.c

/* Copyright (c) 1995 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 * Generate sections of a picture.
 */
 
#include "standard.h"

#ifndef F_SETLKW

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

#else

#include <signal.h>
#include "color.h"
#include "view.h"
#include "resolu.h"

#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()      0
#define unguard()       0
#endif
                                /* rpict command */
char  *rpargv[128] = {"rpict", "-S", "1"};
int  rpargc = 3;
int  rpd[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;

extern long  lseek(), ftell();

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


main(argc, argv)
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))
                        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+1]);
                                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));
}


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

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


init(ac, av)                    /* 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;
                                        /* 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;
        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[0], "r")) == NULL ||
                        (torp = fdopen(rpd[1], "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);
}


int
nextpiece(xp, yp)               /* get next piece assignment */
int  *xp, *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 */
}


int
rvrpiece(xp, yp)                /* check for recoverable pieces */
register int  *xp, *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);
}


int
cleanup(rstat)                  /* 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);
}


rpiece()                        /* render picture piece by piece */
{
        VIEW  pview;
        int  xorg, yorg;
                                        /* compute view parameters */
        copystruct(&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_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 + xorg - 0.5*(hmult-1);
                pview.voff = ourview.voff + 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 */
        }
}


int
putpiece(xpos, ypos)            /* get next piece from rpict */
int  xpos, 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, fls.l_start, 0) == -1)
                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,
                                        (long)(hmult-1)*hr*sizeof(COLR),
                                        1) == -1)
                                filerr("seek");
                }
#if NFS
        fls.l_type = F_UNLCK;           /* release lock */
        if (fcntl(outfd, F_SETLKW, &fls) < 0)
                filerr("lock");
#endif
        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 (verbose) {                          /* notify caller */
                printf("%d %d done\n", xpos, ypos);
                fflush(stdout);
        }
        if (pid == -1)          /* didn't fork or fork failed */
                return(0);
        _exit(0);               /* else exit child process (releasing locks) */
}


filerr(t)                       /* report file error and exit */
char  *t;
{
        extern char  *sys_errlist[];

        fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
                        progname, t, outfile, sys_errlist[errno]);
        _exit(1);
}

#endif
Revision:	2.31
Committed:	Thu Nov 30 09:26:20 1995 UTC (29 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.30:	+9 -1 lines
Log Message:	added -T option to limit execution time
#	User	Rev	Content
1	greg	2.31	/* Copyright (c) 1995 Regents of the University of California */
2	greg	2.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Generate sections of a picture.
9			*/
10
11			#include "standard.h"
12	greg	2.16
13			#ifndef F_SETLKW
14
15			main(argc, argv)
16			int argc;
17			char *argv[];
18			{
19			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
20			exit(1);
21			}
22
23			#else
24
25	greg	2.6	#include <signal.h>
26	greg	2.1	#include "color.h"
27			#include "view.h"
28			#include "resolu.h"
29
30	greg	2.12	#ifndef NFS
31			#define NFS 1
32			#endif
33	greg	2.9	/* set the following to 0 to forgo forking */
34			#ifndef MAXFORK
35	greg	2.12	#if NFS
36	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
37	greg	2.12	#else
38			#define MAXFORK 0
39	greg	2.9	#endif
40	greg	2.12	#endif
41	greg	2.18	/* protection from SYSV signals(!) */
42	greg	2.27	#if defined(sgi)
43	greg	2.18	#define guard_io() sighold(SIGALRM)
44			#define unguard() sigrelse(SIGALRM)
45			#endif
46			#ifndef guard_io
47			#define guard_io() 0
48			#define unguard() 0
49			#endif
50	greg	2.1	/* rpict command */
51	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
52			int rpargc = 3;
53	greg	2.1	int rpd[3];
54			FILE torp, fromrp;
55	greg	2.8	COLR *pbuf;
56	greg	2.1	/* our view parameters */
57			VIEW ourview = STDVIEW;
58	greg	2.4	double pixaspect = 1.0;
59	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
60	greg	2.1	/* output file */
61			char *outfile = NULL;
62			int outfd;
63			long scanorig;
64	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
65			int synclst = F_UNLCK; /* synchronization file lock status */
66	greg	2.9	int nforked = 0;
67	greg	2.1
68	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
69
70	greg	2.1	char *progname;
71			int verbose = 0;
72	greg	2.31	unsigned timelim = 0;
73	greg	2.25	int rvrlim = -1;
74	greg	2.1
75			extern long lseek(), ftell();
76
77	greg	2.6	int gotalrm = 0;
78			int onalrm() { gotalrm++; }
79	greg	2.1
80	greg	2.6
81	greg	2.1	main(argc, argv)
82			int argc;
83			char *argv[];
84			{
85			register int i, rval;
86
87			progname = argv[0];
88			for (i = 1; i < argc; i++) {
89	greg	2.22	/* expand arguments */
90			while (rval = expandarg(&argc, &argv, i))
91			if (rval < 0) {
92			fprintf(stderr, "%s: cannot expand '%s'",
93			argv[0], argv[i]);
94			exit(1);
95			}
96	greg	2.1	if (argv[i][0] == '-')
97			switch (argv[i][1]) {
98			case 'v':
99			switch (argv[i][2]) {
100			case '\0': /* verbose option */
101			verbose = !verbose;
102			continue;
103			case 'f': /* view file */
104			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
105			fprintf(stderr,
106			"%s: not a view file\n", argv[i]);
107			exit(1);
108			}
109			continue;
110			default: /* view option? */
111			rval = getviewopt(&ourview, argc-i, argv+i);
112			if (rval >= 0) {
113			i += rval;
114			continue;
115			}
116			break;
117			}
118			break;
119			case 'p': /* pixel aspect ratio? */
120	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
121			break;
122			pixaspect = atof(argv[i+1]);
123			continue;
124	greg	2.31	case 'T': /* time limit (hours) */
125			if (argv[i][2])
126			break;
127			timelim = atof(argv[++i])*3600. + .5;
128			break;
129	greg	2.23	case 'x': /* overall x resolution */
130			if (argv[i][2])
131			break;
132			hres = atoi(argv[++i]);
133			continue;
134			case 'y': /* overall y resolution */
135			if (argv[i][2])
136			break;
137			vres = atoi(argv[++i]);
138			continue;
139	greg	2.1	case 'X': /* horizontal multiplier */
140			if (argv[i][2])
141			break;
142			hmult = atoi(argv[++i]);
143			continue;
144			case 'Y': /* vertical multiplier */
145			if (argv[i][2])
146			break;
147			vmult = atoi(argv[++i]);
148			continue;
149	greg	2.25	case 'R': /* recover */
150			if (argv[i][2])
151			break;
152			rvrlim = 0;
153			/* fall through */
154	greg	2.5	case 'F': /* syncronization file */
155			if (argv[i][2])
156			break;
157	greg	2.28	if ((syncfp =
158			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
159	greg	2.5	fprintf(stderr, "%s: cannot open\n",
160			argv[i]);
161			exit(1);
162			}
163			continue;
164	greg	2.15	case 'z': /* z-file ist verbotten */
165			fprintf(stderr, "%s: -z option not allowed\n",
166			argv[0]);
167			exit(1);
168	greg	2.1	case 'o': /* output file */
169			if (argv[i][2])
170			break;
171			outfile = argv[++i];
172			continue;
173	greg	2.23	} else if (i >= argc-1)
174			break;
175	greg	2.1	rpargv[rpargc++] = argv[i];
176			}
177	greg	2.23	if (i >= argc) {
178			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
179			exit(1);
180			}
181	greg	2.1	if (outfile == NULL) {
182			fprintf(stderr, "%s: missing output file\n", argv[0]);
183			exit(1);
184			}
185			init(argc, argv);
186			rpiece();
187	greg	2.15	exit(cleanup(0));
188	greg	2.1	}
189
190
191	greg	2.25	dolock(fd, ltyp) /* lock or unlock a file */
192			int fd;
193			int ltyp;
194			{
195			static struct flock fls; /* static so initialized to zeroes */
196	greg	2.28	extern char *sys_errlist[];
197	greg	2.25
198			fls.l_type = ltyp;
199			if (fcntl(fd, F_SETLKW, &fls) < 0) {
200	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
201			progname, sys_errlist[errno]);
202	greg	2.25	exit(1);
203			}
204			}
205
206
207	greg	2.1	init(ac, av) /* set up output file and start rpict */
208			int ac;
209			char **av;
210			{
211	greg	2.23	static char hrbuf[16], vrbuf[16];
212	greg	2.2	extern char VersionID[];
213	greg	2.1	char *err;
214			FILE *fp;
215			int hr, vr;
216			/* set up view */
217			if ((err = setview(&ourview)) != NULL) {
218			fprintf(stderr, "%s: %s\n", progname, err);
219			exit(1);
220			}
221	greg	2.25	if (syncfp != NULL) {
222			sflock(F_RDLCK);
223			fscanf(syncfp, "%d %d", &hmult, &vmult);
224			sflock(F_UNLCK);
225	greg	2.5	}
226	greg	2.23	/* compute piece size */
227			hres /= hmult;
228			vres /= vmult;
229	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
230	greg	2.23	sprintf(hrbuf, "%d", hres);
231			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
232			sprintf(vrbuf, "%d", vres);
233			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
234			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
235			rpargv[rpargc++] = av[ac-1];
236			rpargv[rpargc] = NULL;
237	greg	2.1	/* open output file */
238			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
239	greg	2.25	dolock(outfd, F_WRLCK);
240	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
241			goto filerr;
242	greg	2.29	newheader("RADIANCE", fp); /* create header */
243			printargs(ac, av, fp);
244	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
245	greg	2.1	fputs(VIEWSTR, fp);
246			fprintview(&ourview, fp);
247			putc('\n', fp);
248			if (pixaspect < .99 \|\| pixaspect > 1.01)
249			fputaspect(pixaspect, fp);
250			fputformat(COLRFMT, fp);
251			putc('\n', fp);
252			fprtresolu(hreshmult, vresvmult, fp);
253			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
254	greg	2.25	dolock(outfd, F_RDLCK);
255	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
256			goto filerr;
257	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
258	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
259	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
260	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
261			progname, outfile);
262	greg	2.1	exit(1);
263			}
264			} else {
265	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
266			progname, outfile);
267	greg	2.1	exit(1);
268			}
269			scanorig = ftell(fp); /* record position of first scanline */
270			if (fclose(fp) == -1) /* done with stream i/o */
271			goto filerr;
272	greg	2.25	dolock(outfd, F_UNLCK);
273	greg	2.1	/* start rpict process */
274			if (open_process(rpd, rpargv) <= 0) {
275	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
276	greg	2.1	exit(1);
277			}
278			if ((fromrp = fdopen(rpd[0], "r")) == NULL \|\|
279			(torp = fdopen(rpd[1], "w")) == NULL) {
280			fprintf(stderr, "%s: cannot open stream to %s\n",
281			progname, rpargv[0]);
282			exit(1);
283			}
284	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
285	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
286			exit(1);
287			}
288	greg	2.6	signal(SIGALRM, onalrm);
289	greg	2.31	if (timelim)
290			alarm(timelim);
291	greg	2.1	return;
292			filerr:
293	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
294	greg	2.1	exit(1);
295			}
296
297
298			int
299	greg	2.5	nextpiece(xp, yp) /* get next piece assignment */
300			int xp, yp;
301			{
302	greg	2.6	if (gotalrm) /* someone wants us to quit */
303			return(0);
304	greg	2.25	if (syncfp != NULL) { /* use sync file */
305			/*
306			* So we don't necessarily have to lock and unlock the file
307			* multiple times (very slow), we establish an exclusive
308			* lock at the beginning on our synchronization file and
309			* maintain it in the subroutine rvrpiece().
310			*/
311			sflock(F_WRLCK);
312			fseek(syncfp, 0L, 0); /* read position */
313			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
314	greg	2.8	*xp = hmult-1;
315			*yp = vmult;
316			}
317	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
318			rvrlim = xpvmult + *yp;
319			if (rvrpiece(xp, yp)) { /* do stragglers first */
320			sflock(F_UNLCK);
321			return(1);
322			}
323	greg	2.8	if (--(yp) < 0) { / decrement position */
324	greg	2.5	*yp = vmult-1;
325	greg	2.25	if (--(xp) < 0) { / all done */
326			sflock(F_UNLCK);
327	greg	2.5	return(0);
328			}
329			}
330	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
331			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
332			fflush(syncfp);
333			sflock(F_UNLCK); /* release sync file */
334	greg	2.5	return(1);
335			}
336	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
337	greg	2.5	}
338
339
340			int
341	greg	2.25	rvrpiece(xp, yp) /* check for recoverable pieces */
342			register int xp, yp;
343			{
344			static char pdone = NULL; / which pieces are done */
345			static long readpos = -1; /* how far we've read */
346			register int i;
347			/*
348			* This routine is called by nextpiece() with an
349			* exclusive lock on syncfp and the file pointer at the
350			* appropriate position to read in the finished pieces.
351			*/
352			if (rvrlim < 0)
353			return(0); /* only check if asked */
354			if (pdone == NULL) /* first call */
355			pdone = calloc(hmult*vmult, sizeof(char));
356	greg	2.30	if (pdone == NULL) {
357			fprintf(stderr, "%s: out of memory\n", progname);
358			exit(1);
359			}
360	greg	2.25	if (readpos != -1) /* mark what's been done */
361			fseek(syncfp, readpos, 0);
362			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
363			pdone[xpvmult+*yp] = 1;
364			if (!feof(syncfp)) {
365			fprintf(stderr, "%s: format error in sync file\n", progname);
366			exit(1);
367			}
368			readpos = ftell(syncfp);
369			i = hmultvmult; / find an unaccounted for piece */
370			while (i-- > rvrlim)
371			if (!pdone[i]) {
372			*xp = i / vmult;
373			*yp = i % vmult;
374			pdone[i] = 1; /* consider it done */
375			return(1);
376			}
377			rvrlim = -1; /* nothing left to recover */
378			free(pdone);
379			pdone = NULL;
380			return(0);
381			}
382
383
384			int
385	greg	2.10	cleanup(rstat) /* close rpict process and clean up */
386			int rstat;
387	greg	2.1	{
388	greg	2.10	int status;
389	greg	2.1
390	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
391	greg	2.1	fclose(torp);
392			fclose(fromrp);
393	greg	2.10	while (wait(&status) != -1)
394	greg	2.9	if (rstat == 0)
395			rstat = status>>8 & 0xff;
396			return(rstat);
397	greg	2.1	}
398
399
400			rpiece() /* render picture piece by piece */
401			{
402			VIEW pview;
403			int xorg, yorg;
404	greg	2.11	/* compute view parameters */
405			copystruct(&pview, &ourview);
406			switch (ourview.type) {
407			case VT_PER:
408			pview.horiz = 2.180./PIatan(
409			tan(PI/180./2.*ourview.horiz)/hmult );
410			pview.vert = 2.180./PIatan(
411			tan(PI/180./2.*ourview.vert)/vmult );
412			break;
413			case VT_PAR:
414			case VT_ANG:
415			pview.horiz = ourview.horiz / hmult;
416			pview.vert = ourview.vert / vmult;
417			break;
418			case VT_HEM:
419			pview.horiz = 2.180./PIasin(
420			sin(PI/180./2.*ourview.horiz)/hmult );
421			pview.vert = 2.180./PIasin(
422			sin(PI/180./2.*ourview.vert)/vmult );
423			break;
424			default:
425			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
426			progname, ourview.type);
427			exit(cleanup(1));
428			}
429			/* render each piece */
430	greg	2.5	while (nextpiece(&xorg, &yorg)) {
431	greg	2.11	pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1);
432			pview.voff = ourview.voff + yorg - 0.5*(vmult-1);
433	greg	2.1	fputs(VIEWSTR, torp);
434			fprintview(&pview, torp);
435			putc('\n', torp);
436	greg	2.11	fflush(torp); /* assigns piece to rpict */
437	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
438			}
439			}
440
441
442	greg	2.9	int
443	greg	2.1	putpiece(xpos, ypos) /* get next piece from rpict */
444			int xpos, ypos;
445			{
446	greg	2.7	struct flock fls;
447	greg	2.9	int pid, status;
448	greg	2.1	int hr, vr;
449	greg	2.8	register int y;
450			/* check bounds */
451	greg	2.5	if (xpos < 0 \| ypos < 0 \| xpos >= hmult \| ypos >= vmult) {
452			fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
453			progname, xpos, ypos);
454	greg	2.10	exit(cleanup(1));
455	greg	2.5	}
456	greg	2.8	/* check header from rpict */
457	greg	2.18	guard_io();
458	greg	2.13	getheader(fromrp, NULL, NULL);
459	greg	2.15	if (!fscnresolu(&hr, &vr, fromrp) \|\| hr != hres \| vr != vres) {
460	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
461			progname, rpargv[0]);
462	greg	2.10	exit(cleanup(1));
463	greg	2.1	}
464	greg	2.24	if (verbose) { /* notify caller */
465			printf("%d %d begun\n", xpos, ypos);
466			fflush(stdout);
467			}
468	greg	2.18	unguard();
469	greg	2.8	/* load new piece into buffer */
470	greg	2.18	for (y = 0; y < vr; y++) {
471			guard_io();
472	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
473	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
474			progname, rpargv[0]);
475	greg	2.10	exit(cleanup(1));
476	greg	2.1	}
477	greg	2.18	unguard();
478			}
479	greg	2.9	#if MAXFORK
480			/* fork so we don't slow rpict down */
481			if ((pid = fork()) > 0) {
482	greg	2.10	if (++nforked >= MAXFORK) {
483	greg	2.9	wait(&status); /* reap a child */
484			if (status)
485	greg	2.10	exit(cleanup(status>>8 & 0xff));
486	greg	2.9	nforked--;
487			}
488			return(pid);
489			}
490			#else
491			pid = -1; /* no forking */
492			#endif
493	greg	2.19	fls.l_start = scanorig +
494			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
495	greg	2.12	#if NFS
496	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
497	greg	2.8	/* lock file section so NFS doesn't mess up */
498			fls.l_whence = 0;
499			fls.l_type = F_WRLCK;
500	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
501			filerr("lock");
502	greg	2.12	#endif
503	greg	2.8	/* write new piece to file */
504	greg	2.19	if (lseek(outfd, fls.l_start, 0) == -1)
505	greg	2.26	filerr("seek");
506	greg	2.9	if (hmult == 1) {
507			if (writebuf(outfd, (char *)pbuf,
508			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
509	greg	2.26	filerr("write");
510	greg	2.9	} else
511			for (y = 0; y < vr; y++) {
512			if (writebuf(outfd, (char )(pbuf+yhr),
513			hrsizeof(COLR)) != hrsizeof(COLR))
514	greg	2.26	filerr("write");
515	greg	2.9	if (y < vr-1 && lseek(outfd,
516			(long)(hmult-1)hrsizeof(COLR),
517			1) == -1)
518	greg	2.26	filerr("seek");
519	greg	2.1	}
520	greg	2.25	#if NFS
521			fls.l_type = F_UNLCK; /* release lock */
522	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
523			filerr("lock");
524	greg	2.25	#endif
525			if (syncfp != NULL) { /* record what's been done */
526			sflock(F_WRLCK);
527			fseek(syncfp, 0L, 2); /* append index */
528			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
529			fflush(syncfp);
530			/*** Unlock not necessary, since
531			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
532			}
533	greg	2.20	if (verbose) { /* notify caller */
534			printf("%d %d done\n", xpos, ypos);
535			fflush(stdout);
536			}
537	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
538	greg	2.9	return(0);
539	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
540	greg	2.26	}
541
542
543			filerr(t) /* report file error and exit */
544			char *t;
545			{
546			extern char *sys_errlist[];
547
548			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
549			progname, t, outfile, sys_errlist[errno]);
550	greg	2.9	_exit(1);
551	greg	2.1	}
552	greg	2.16
553			#endif