src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.55 2013/11/08 18:08:07 greg Exp $";
#endif
/*
 * Generate sections of a picture.
 */
 

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>

#include "platform.h"
#ifndef NON_POSIX /* XXX need abstraction for process management */
 #include <sys/wait.h>
#endif

#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

#ifndef RHAS_FORK_EXEC
#undef MAXFORK
#define MAXFORK                 0
#endif
#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;
int  nowarn = 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[]
)
{
        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'\n",
                                        argv[0], argv[i]);
                        exit(1);
                }
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'w':
                                if (!argv[i][2])
                                        nowarn = !nowarn;
                                else if (argv[i][2] == '+')
                                        nowarn = 0;
                                else if (argv[i][2] == '-')
                                        nowarn = 1;
                                break;
                        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] == 'm') {
                                        fprintf(stderr, "%s: -pm unsupported\n",
                                                argv[0]);
                                        ++i;
                                        continue;
                                }
                                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;
                                continue;
                        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 */
        hr = hres; vr = vres;
        if (pixaspect > FTINY)
                normaspect(viewaspect(&ourview), &pixaspect, &hr, &vr);
        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);
        if (!nowarn && (hr != hres*hmult) | (vr != vres*vmult))
                fprintf(stderr,
                "%s: warning - resolution changed from %dx%d to %dx%d\n",
                                progname, hr, vr, hres*hmult, vres*vmult);
        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);
                fputnow(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 */
        int     *xp,
        int     *yp
)
{
        static char  *pdone = NULL;     /* which pieces are done */
        static long  readpos = -1;      /* how far we've read */
        int  px, py, 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 = (char *)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", &px, &py) == 2)
                pdone[px*vmult+py] = 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;
        case VT_PLS:
                pview.horiz = sin((PI/180./2.)*ourview.horiz) /
                                (1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
                pview.horiz *= pview.horiz;
                pview.horiz = (2.*180./PI)*acos((1. - pview.horiz) /
                                                (1. + pview.horiz));
                pview.vert = sin((PI/180./2.)*ourview.vert) /
                                (1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
                pview.vert *= pview.vert;
                pview.vert = (2.*180./PI)*acos((1. - pview.vert) /
                                                (1. + pview.vert));
                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;
        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 0
        if (fcntl(outfd, F_SETLKW, &fls) < 0)
                filerr("lock");
#else
        dolock(outfd, F_WRLCK);
#endif
#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 0
        if (fcntl(outfd, F_SETLKW, &fls) < 0)
                filerr("lock");
#else
        dolock(outfd, F_UNLCK);
#endif
#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:	2.56
Committed:	Thu Dec 5 03:02:56 2013 UTC (10 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2P2, rad5R0, rad5R1, rad4R2, rad4R2P1
Changes since 2.55:	+5 -5 lines
Log Message:	Fixed bug where -R option would cause finished pieces to be re-rendered
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.56	static const char RCSid[] = "$Id: rpiece.c,v 2.55 2013/11/08 18:08:07 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	2.49
13			#include "platform.h"
14	schorsch	2.45	#ifndef NON_POSIX /* XXX need abstraction for process management */
15			#include <sys/wait.h>
16			#endif
17	schorsch	2.43
18	greg	2.44	#include "standard.h"
19	schorsch	2.43	#include "color.h"
20			#include "view.h"
21			#include "rtprocess.h"
22	greg	2.16
23			#ifndef F_SETLKW
24
25	schorsch	2.43	int
26			main(
27			int argc,
28			char *argv[]
29			)
30	greg	2.16	{
31			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
32			exit(1);
33			}
34
35			#else
36
37	greg	2.12	#ifndef NFS
38			#define NFS 1
39			#endif
40	greg	2.55
41			#ifndef RHAS_FORK_EXEC
42			#undef MAXFORK
43			#define MAXFORK 0
44			#endif
45	greg	2.9	#ifndef MAXFORK
46	greg	2.12	#if NFS
47	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
48	greg	2.12	#else
49			#define MAXFORK 0
50	greg	2.9	#endif
51	greg	2.12	#endif
52	greg	2.18	/* protection from SYSV signals(!) */
53	greg	2.27	#if defined(sgi)
54	greg	2.18	#define guard_io() sighold(SIGALRM)
55			#define unguard() sigrelse(SIGALRM)
56			#endif
57			#ifndef guard_io
58	schorsch	2.43	#define guard_io()
59			#define unguard()
60	greg	2.18	#endif
61	gregl	2.34
62	greg	2.37	extern char *strerror();
63	gregl	2.34
64	greg	2.1	/* rpict command */
65	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
66			int rpargc = 3;
67	greg	2.1	FILE torp, fromrp;
68	greg	2.8	COLR *pbuf;
69	greg	2.1	/* our view parameters */
70			VIEW ourview = STDVIEW;
71	greg	2.4	double pixaspect = 1.0;
72	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
73	greg	2.1	/* output file */
74			char *outfile = NULL;
75			int outfd;
76			long scanorig;
77	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
78			int synclst = F_UNLCK; /* synchronization file lock status */
79	greg	2.9	int nforked = 0;
80	greg	2.1
81	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
82
83	greg	2.1	char *progname;
84			int verbose = 0;
85	greg	2.53	int nowarn = 0;
86	greg	2.31	unsigned timelim = 0;
87	greg	2.25	int rvrlim = -1;
88	greg	2.1
89	greg	2.6	int gotalrm = 0;
90	schorsch	2.38	void onalrm(int i) { gotalrm++; }
91	greg	2.1
92	schorsch	2.43	static void dolock(int fd, int ltyp);
93			static void init(int ac, char **av);
94			static int nextpiece(int xp, int yp);
95			static int rvrpiece(int xp, int yp);
96			static int cleanup(int rstat);
97			static void rpiece(void);
98			static int putpiece(int xpos, int ypos);
99			static void filerr(char *t);
100	greg	2.6
101	schorsch	2.43
102			int
103			main(
104			int argc,
105			char *argv[]
106			)
107	greg	2.1	{
108	greg	2.55	int i, rval;
109	greg	2.1
110			progname = argv[0];
111			for (i = 1; i < argc; i++) {
112	greg	2.22	/* expand arguments */
113	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
114			;
115			if (rval < 0) {
116	greg	2.50	fprintf(stderr, "%s: cannot expand '%s'\n",
117	greg	2.37	argv[0], argv[i]);
118			exit(1);
119			}
120	greg	2.1	if (argv[i][0] == '-')
121			switch (argv[i][1]) {
122	greg	2.53	case 'w':
123			if (!argv[i][2])
124			nowarn = !nowarn;
125			else if (argv[i][2] == '+')
126			nowarn = 0;
127			else if (argv[i][2] == '-')
128			nowarn = 1;
129			break;
130	greg	2.1	case 'v':
131			switch (argv[i][2]) {
132			case '\0': /* verbose option */
133			verbose = !verbose;
134			continue;
135			case 'f': /* view file */
136			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
137			fprintf(stderr,
138			"%s: not a view file\n", argv[i]);
139			exit(1);
140			}
141			continue;
142			default: /* view option? */
143			rval = getviewopt(&ourview, argc-i, argv+i);
144			if (rval >= 0) {
145			i += rval;
146			continue;
147			}
148			break;
149			}
150			break;
151			case 'p': /* pixel aspect ratio? */
152	greg	2.51	if (argv[i][2] == 'm') {
153			fprintf(stderr, "%s: -pm unsupported\n",
154			argv[0]);
155			++i;
156			continue;
157			}
158	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
159			break;
160	gregl	2.35	pixaspect = atof(argv[++i]);
161	greg	2.23	continue;
162	greg	2.31	case 'T': /* time limit (hours) */
163			if (argv[i][2])
164			break;
165			timelim = atof(argv[++i])*3600. + .5;
166	greg	2.51	continue;
167	greg	2.23	case 'x': /* overall x resolution */
168			if (argv[i][2])
169			break;
170			hres = atoi(argv[++i]);
171			continue;
172			case 'y': /* overall y resolution */
173			if (argv[i][2])
174			break;
175			vres = atoi(argv[++i]);
176			continue;
177	greg	2.1	case 'X': /* horizontal multiplier */
178			if (argv[i][2])
179			break;
180			hmult = atoi(argv[++i]);
181			continue;
182			case 'Y': /* vertical multiplier */
183			if (argv[i][2])
184			break;
185			vmult = atoi(argv[++i]);
186			continue;
187	greg	2.25	case 'R': /* recover */
188			if (argv[i][2])
189			break;
190			rvrlim = 0;
191			/* fall through */
192	greg	2.5	case 'F': /* syncronization file */
193			if (argv[i][2])
194			break;
195	greg	2.28	if ((syncfp =
196			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
197	greg	2.5	fprintf(stderr, "%s: cannot open\n",
198			argv[i]);
199			exit(1);
200			}
201			continue;
202	greg	2.15	case 'z': /* z-file ist verbotten */
203			fprintf(stderr, "%s: -z option not allowed\n",
204			argv[0]);
205			exit(1);
206	greg	2.1	case 'o': /* output file */
207			if (argv[i][2])
208			break;
209			outfile = argv[++i];
210			continue;
211	greg	2.53	}
212			else if (i >= argc-1)
213			break;
214	greg	2.1	rpargv[rpargc++] = argv[i];
215			}
216	greg	2.23	if (i >= argc) {
217			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
218			exit(1);
219			}
220	greg	2.1	if (outfile == NULL) {
221			fprintf(stderr, "%s: missing output file\n", argv[0]);
222			exit(1);
223			}
224			init(argc, argv);
225			rpiece();
226	greg	2.15	exit(cleanup(0));
227	greg	2.1	}
228
229
230	schorsch	2.43	static void
231			dolock( /* lock or unlock a file */
232			int fd,
233			int ltyp
234			)
235	greg	2.25	{
236			static struct flock fls; /* static so initialized to zeroes */
237
238			fls.l_type = ltyp;
239			if (fcntl(fd, F_SETLKW, &fls) < 0) {
240	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
241	greg	2.37	progname, strerror(errno));
242	greg	2.54	_exit(1);
243	greg	2.25	}
244			}
245
246
247	schorsch	2.43	static void
248			init( /* set up output file and start rpict */
249			int ac,
250			char **av
251			)
252	greg	2.1	{
253	greg	2.23	static char hrbuf[16], vrbuf[16];
254	greg	2.2	extern char VersionID[];
255	greg	2.1	char *err;
256			FILE *fp;
257			int hr, vr;
258	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
259	greg	2.1	/* set up view */
260			if ((err = setview(&ourview)) != NULL) {
261			fprintf(stderr, "%s: %s\n", progname, err);
262			exit(1);
263			}
264	greg	2.25	if (syncfp != NULL) {
265			sflock(F_RDLCK);
266			fscanf(syncfp, "%d %d", &hmult, &vmult);
267			sflock(F_UNLCK);
268	greg	2.5	}
269	greg	2.23	/* compute piece size */
270	greg	2.53	hr = hres; vr = vres;
271			if (pixaspect > FTINY)
272			normaspect(viewaspect(&ourview), &pixaspect, &hr, &vr);
273	greg	2.23	hres /= hmult;
274			vres /= vmult;
275	greg	2.46	if (hres <= 0 \|\| vres <= 0) {
276	greg	2.47	fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
277	greg	2.46	exit(1);
278			}
279	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
280	greg	2.53	if (!nowarn && (hr != hreshmult) \| (vr != vresvmult))
281			fprintf(stderr,
282			"%s: warning - resolution changed from %dx%d to %dx%d\n",
283			progname, hr, vr, hreshmult, vresvmult);
284	greg	2.23	sprintf(hrbuf, "%d", hres);
285			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
286			sprintf(vrbuf, "%d", vres);
287			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
288			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
289			rpargv[rpargc++] = av[ac-1];
290			rpargv[rpargc] = NULL;
291	greg	2.1	/* open output file */
292			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
293	greg	2.25	dolock(outfd, F_WRLCK);
294	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
295			goto filerr;
296	greg	2.29	newheader("RADIANCE", fp); /* create header */
297			printargs(ac, av, fp);
298	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
299	greg	2.1	fputs(VIEWSTR, fp);
300			fprintview(&ourview, fp);
301			putc('\n', fp);
302	greg	2.52	fputnow(fp);
303	greg	2.1	if (pixaspect < .99 \|\| pixaspect > 1.01)
304			fputaspect(pixaspect, fp);
305			fputformat(COLRFMT, fp);
306			putc('\n', fp);
307			fprtresolu(hreshmult, vresvmult, fp);
308			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
309	greg	2.25	dolock(outfd, F_RDLCK);
310	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
311			goto filerr;
312	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
313	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
314	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
315	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
316			progname, outfile);
317	greg	2.1	exit(1);
318			}
319			} else {
320	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
321			progname, outfile);
322	greg	2.1	exit(1);
323			}
324			scanorig = ftell(fp); /* record position of first scanline */
325			if (fclose(fp) == -1) /* done with stream i/o */
326			goto filerr;
327	greg	2.25	dolock(outfd, F_UNLCK);
328	greg	2.1	/* start rpict process */
329	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
330	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
331	greg	2.1	exit(1);
332			}
333	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
334			(torp = fdopen(rpd.w, "w")) == NULL) {
335	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
336			progname, rpargv[0]);
337			exit(1);
338			}
339	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
340	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
341			exit(1);
342			}
343	greg	2.6	signal(SIGALRM, onalrm);
344	greg	2.31	if (timelim)
345			alarm(timelim);
346	greg	2.1	return;
347			filerr:
348	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
349	greg	2.1	exit(1);
350			}
351
352
353	schorsch	2.43	static int
354			nextpiece( /* get next piece assignment */
355			int *xp,
356			int *yp
357			)
358	greg	2.5	{
359	greg	2.6	if (gotalrm) /* someone wants us to quit */
360			return(0);
361	greg	2.25	if (syncfp != NULL) { /* use sync file */
362			/*
363			* So we don't necessarily have to lock and unlock the file
364			* multiple times (very slow), we establish an exclusive
365			* lock at the beginning on our synchronization file and
366			* maintain it in the subroutine rvrpiece().
367			*/
368			sflock(F_WRLCK);
369			fseek(syncfp, 0L, 0); /* read position */
370			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
371	greg	2.8	*xp = hmult-1;
372			*yp = vmult;
373			}
374	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
375			rvrlim = xpvmult + *yp;
376			if (rvrpiece(xp, yp)) { /* do stragglers first */
377			sflock(F_UNLCK);
378			return(1);
379			}
380	greg	2.8	if (--(yp) < 0) { / decrement position */
381	greg	2.5	*yp = vmult-1;
382	greg	2.25	if (--(xp) < 0) { / all done */
383			sflock(F_UNLCK);
384	greg	2.5	return(0);
385			}
386			}
387	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
388			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
389			fflush(syncfp);
390			sflock(F_UNLCK); /* release sync file */
391	greg	2.5	return(1);
392			}
393	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
394	greg	2.5	}
395
396
397	schorsch	2.43	static int
398			rvrpiece( /* check for recoverable pieces */
399	greg	2.55	int *xp,
400			int *yp
401	schorsch	2.43	)
402	greg	2.25	{
403			static char pdone = NULL; / which pieces are done */
404			static long readpos = -1; /* how far we've read */
405	greg	2.56	int px, py, i;
406	greg	2.25	/*
407			* This routine is called by nextpiece() with an
408			* exclusive lock on syncfp and the file pointer at the
409			* appropriate position to read in the finished pieces.
410			*/
411			if (rvrlim < 0)
412			return(0); /* only check if asked */
413			if (pdone == NULL) /* first call */
414	greg	2.56	pdone = (char )calloc(hmultvmult, sizeof(char));
415	greg	2.30	if (pdone == NULL) {
416			fprintf(stderr, "%s: out of memory\n", progname);
417			exit(1);
418			}
419	greg	2.25	if (readpos != -1) /* mark what's been done */
420			fseek(syncfp, readpos, 0);
421	greg	2.56	while (fscanf(syncfp, "%d %d", &px, &py) == 2)
422			pdone[px*vmult+py] = 1;
423	greg	2.25	if (!feof(syncfp)) {
424			fprintf(stderr, "%s: format error in sync file\n", progname);
425			exit(1);
426			}
427			readpos = ftell(syncfp);
428			i = hmultvmult; / find an unaccounted for piece */
429			while (i-- > rvrlim)
430			if (!pdone[i]) {
431			*xp = i / vmult;
432			*yp = i % vmult;
433			pdone[i] = 1; /* consider it done */
434			return(1);
435			}
436			rvrlim = -1; /* nothing left to recover */
437			free(pdone);
438			pdone = NULL;
439			return(0);
440			}
441
442
443	schorsch	2.43	static int
444			cleanup( /* close rpict process and clean up */
445			int rstat
446			)
447	greg	2.1	{
448	greg	2.10	int status;
449	greg	2.1
450	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
451	greg	2.1	fclose(torp);
452			fclose(fromrp);
453	greg	2.10	while (wait(&status) != -1)
454	greg	2.9	if (rstat == 0)
455			rstat = status>>8 & 0xff;
456			return(rstat);
457	greg	2.1	}
458
459
460	schorsch	2.43	static void
461			rpiece(void) /* render picture piece by piece */
462	greg	2.1	{
463			VIEW pview;
464			int xorg, yorg;
465	greg	2.11	/* compute view parameters */
466	schorsch	2.40	pview = ourview;
467	greg	2.11	switch (ourview.type) {
468			case VT_PER:
469	greg	2.48	pview.horiz = (2.180./PI)atan(
470			tan((PI/180./2.)*ourview.horiz)/hmult );
471			pview.vert = (2.180./PI)atan(
472			tan((PI/180./2.)*ourview.vert)/vmult );
473	greg	2.11	break;
474			case VT_PAR:
475			case VT_ANG:
476			pview.horiz = ourview.horiz / hmult;
477			pview.vert = ourview.vert / vmult;
478			break;
479	greg	2.32	case VT_CYL:
480			pview.horiz = ourview.horiz / hmult;
481	greg	2.48	pview.vert = (2.180./PI)atan(
482			tan((PI/180./2.)*ourview.vert)/vmult );
483	greg	2.32	break;
484	greg	2.11	case VT_HEM:
485	greg	2.48	pview.horiz = (2.180./PI)asin(
486			sin((PI/180./2.)*ourview.horiz)/hmult );
487			pview.vert = (2.180./PI)asin(
488			sin((PI/180./2.)*ourview.vert)/vmult );
489			break;
490			case VT_PLS:
491			pview.horiz = sin((PI/180./2.)*ourview.horiz) /
492			(1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
493			pview.horiz *= pview.horiz;
494			pview.horiz = (2.180./PI)acos((1. - pview.horiz) /
495			(1. + pview.horiz));
496			pview.vert = sin((PI/180./2.)*ourview.vert) /
497			(1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
498			pview.vert *= pview.vert;
499			pview.vert = (2.180./PI)acos((1. - pview.vert) /
500			(1. + pview.vert));
501	greg	2.11	break;
502			default:
503			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
504			progname, ourview.type);
505			exit(cleanup(1));
506			}
507			/* render each piece */
508	greg	2.5	while (nextpiece(&xorg, &yorg)) {
509	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
510			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
511	greg	2.1	fputs(VIEWSTR, torp);
512			fprintview(&pview, torp);
513			putc('\n', torp);
514	greg	2.11	fflush(torp); /* assigns piece to rpict */
515	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
516			}
517			}
518
519
520	schorsch	2.43	static int
521			putpiece( /* get next piece from rpict */
522			int xpos,
523			int ypos
524			)
525	greg	2.1	{
526	greg	2.7	struct flock fls;
527	greg	2.9	int pid, status;
528	greg	2.1	int hr, vr;
529	greg	2.55	int y;
530	greg	2.8	/* check bounds */
531	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
532	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
533			progname, xpos, ypos);
534	greg	2.10	exit(cleanup(1));
535	greg	2.5	}
536	greg	2.8	/* check header from rpict */
537	greg	2.18	guard_io();
538	greg	2.13	getheader(fromrp, NULL, NULL);
539	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
540	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
541			progname, rpargv[0]);
542	greg	2.10	exit(cleanup(1));
543	greg	2.1	}
544	greg	2.24	if (verbose) { /* notify caller */
545			printf("%d %d begun\n", xpos, ypos);
546			fflush(stdout);
547			}
548	greg	2.18	unguard();
549	greg	2.8	/* load new piece into buffer */
550	greg	2.18	for (y = 0; y < vr; y++) {
551			guard_io();
552	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
553	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
554			progname, rpargv[0]);
555	greg	2.10	exit(cleanup(1));
556	greg	2.1	}
557	greg	2.18	unguard();
558			}
559	greg	2.9	#if MAXFORK
560			/* fork so we don't slow rpict down */
561			if ((pid = fork()) > 0) {
562	greg	2.10	if (++nforked >= MAXFORK) {
563	greg	2.9	wait(&status); /* reap a child */
564			if (status)
565	greg	2.10	exit(cleanup(status>>8 & 0xff));
566	greg	2.9	nforked--;
567			}
568			return(pid);
569			}
570			#else
571			pid = -1; /* no forking */
572			#endif
573	greg	2.19	fls.l_start = scanorig +
574			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
575	greg	2.12	#if NFS
576	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
577	greg	2.8	/* lock file section so NFS doesn't mess up */
578			fls.l_whence = 0;
579			fls.l_type = F_WRLCK;
580	greg	2.54	#if 0
581	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
582			filerr("lock");
583	greg	2.54	#else
584			dolock(outfd, F_WRLCK);
585			#endif
586	greg	2.12	#endif
587	greg	2.8	/* write new piece to file */
588	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
589	greg	2.26	filerr("seek");
590	greg	2.9	if (hmult == 1) {
591			if (writebuf(outfd, (char *)pbuf,
592			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
593	greg	2.26	filerr("write");
594	greg	2.9	} else
595			for (y = 0; y < vr; y++) {
596			if (writebuf(outfd, (char )(pbuf+yhr),
597			hrsizeof(COLR)) != hrsizeof(COLR))
598	greg	2.26	filerr("write");
599	greg	2.9	if (y < vr-1 && lseek(outfd,
600	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
601	greg	2.42	SEEK_CUR) < 0)
602	greg	2.26	filerr("seek");
603	greg	2.1	}
604	greg	2.25	#if NFS
605			fls.l_type = F_UNLCK; /* release lock */
606	greg	2.54	#if 0
607	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
608			filerr("lock");
609	greg	2.54	#else
610			dolock(outfd, F_UNLCK);
611			#endif
612	greg	2.25	#endif
613	greg	2.32	if (verbose) { /* notify caller */
614			printf("%d %d done\n", xpos, ypos);
615			fflush(stdout);
616			}
617	greg	2.25	if (syncfp != NULL) { /* record what's been done */
618			sflock(F_WRLCK);
619			fseek(syncfp, 0L, 2); /* append index */
620			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
621			fflush(syncfp);
622			/*** Unlock not necessary, since
623			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
624	greg	2.20	}
625	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
626	greg	2.9	return(0);
627	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
628	greg	2.26	}
629
630
631	schorsch	2.43	static void
632			filerr( /* report file error and exit */
633			char *t
634			)
635	greg	2.26	{
636			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
637	greg	2.37	progname, t, outfile, strerror(errno));
638	greg	2.9	_exit(1);
639	greg	2.1	}
640	greg	2.16
641			#endif