src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.52 2010/05/28 22:36:19 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
                                /* 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;
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[]
)
{
        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'\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 */
        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;
        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;
        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:	2.53
Committed:	Sat Jan 21 22:04:02 2012 UTC (12 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.52:	+20 -3 lines
Log Message:	Added warning about altered output resolution
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.53	static const char RCSid[] = "$Id: rpiece.c,v 2.52 2010/05/28 22:36:19 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	2.9	/* set the following to 0 to forgo forking */
41			#ifndef MAXFORK
42	greg	2.12	#if NFS
43	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
44	greg	2.12	#else
45			#define MAXFORK 0
46	greg	2.9	#endif
47	greg	2.12	#endif
48	greg	2.18	/* protection from SYSV signals(!) */
49	greg	2.27	#if defined(sgi)
50	greg	2.18	#define guard_io() sighold(SIGALRM)
51			#define unguard() sigrelse(SIGALRM)
52			#endif
53			#ifndef guard_io
54	schorsch	2.43	#define guard_io()
55			#define unguard()
56	greg	2.18	#endif
57	gregl	2.34
58	greg	2.37	extern char *strerror();
59	gregl	2.34
60	greg	2.1	/* rpict command */
61	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
62			int rpargc = 3;
63	greg	2.1	FILE torp, fromrp;
64	greg	2.8	COLR *pbuf;
65	greg	2.1	/* our view parameters */
66			VIEW ourview = STDVIEW;
67	greg	2.4	double pixaspect = 1.0;
68	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
69	greg	2.1	/* output file */
70			char *outfile = NULL;
71			int outfd;
72			long scanorig;
73	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
74			int synclst = F_UNLCK; /* synchronization file lock status */
75	greg	2.9	int nforked = 0;
76	greg	2.1
77	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
78
79	greg	2.1	char *progname;
80			int verbose = 0;
81	greg	2.53	int nowarn = 0;
82	greg	2.31	unsigned timelim = 0;
83	greg	2.25	int rvrlim = -1;
84	greg	2.1
85	greg	2.6	int gotalrm = 0;
86	schorsch	2.38	void onalrm(int i) { gotalrm++; }
87	greg	2.1
88	schorsch	2.43	static void dolock(int fd, int ltyp);
89			static void init(int ac, char **av);
90			static int nextpiece(int xp, int yp);
91			static int rvrpiece(int xp, int yp);
92			static int cleanup(int rstat);
93			static void rpiece(void);
94			static int putpiece(int xpos, int ypos);
95			static void filerr(char *t);
96	greg	2.6
97	schorsch	2.43
98			int
99			main(
100			int argc,
101			char *argv[]
102			)
103	greg	2.1	{
104			register int i, rval;
105
106			progname = argv[0];
107			for (i = 1; i < argc; i++) {
108	greg	2.22	/* expand arguments */
109	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
110			;
111			if (rval < 0) {
112	greg	2.50	fprintf(stderr, "%s: cannot expand '%s'\n",
113	greg	2.37	argv[0], argv[i]);
114			exit(1);
115			}
116	greg	2.1	if (argv[i][0] == '-')
117			switch (argv[i][1]) {
118	greg	2.53	case 'w':
119			if (!argv[i][2])
120			nowarn = !nowarn;
121			else if (argv[i][2] == '+')
122			nowarn = 0;
123			else if (argv[i][2] == '-')
124			nowarn = 1;
125			break;
126	greg	2.1	case 'v':
127			switch (argv[i][2]) {
128			case '\0': /* verbose option */
129			verbose = !verbose;
130			continue;
131			case 'f': /* view file */
132			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
133			fprintf(stderr,
134			"%s: not a view file\n", argv[i]);
135			exit(1);
136			}
137			continue;
138			default: /* view option? */
139			rval = getviewopt(&ourview, argc-i, argv+i);
140			if (rval >= 0) {
141			i += rval;
142			continue;
143			}
144			break;
145			}
146			break;
147			case 'p': /* pixel aspect ratio? */
148	greg	2.51	if (argv[i][2] == 'm') {
149			fprintf(stderr, "%s: -pm unsupported\n",
150			argv[0]);
151			++i;
152			continue;
153			}
154	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
155			break;
156	gregl	2.35	pixaspect = atof(argv[++i]);
157	greg	2.23	continue;
158	greg	2.31	case 'T': /* time limit (hours) */
159			if (argv[i][2])
160			break;
161			timelim = atof(argv[++i])*3600. + .5;
162	greg	2.51	continue;
163	greg	2.23	case 'x': /* overall x resolution */
164			if (argv[i][2])
165			break;
166			hres = atoi(argv[++i]);
167			continue;
168			case 'y': /* overall y resolution */
169			if (argv[i][2])
170			break;
171			vres = atoi(argv[++i]);
172			continue;
173	greg	2.1	case 'X': /* horizontal multiplier */
174			if (argv[i][2])
175			break;
176			hmult = atoi(argv[++i]);
177			continue;
178			case 'Y': /* vertical multiplier */
179			if (argv[i][2])
180			break;
181			vmult = atoi(argv[++i]);
182			continue;
183	greg	2.25	case 'R': /* recover */
184			if (argv[i][2])
185			break;
186			rvrlim = 0;
187			/* fall through */
188	greg	2.5	case 'F': /* syncronization file */
189			if (argv[i][2])
190			break;
191	greg	2.28	if ((syncfp =
192			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
193	greg	2.5	fprintf(stderr, "%s: cannot open\n",
194			argv[i]);
195			exit(1);
196			}
197			continue;
198	greg	2.15	case 'z': /* z-file ist verbotten */
199			fprintf(stderr, "%s: -z option not allowed\n",
200			argv[0]);
201			exit(1);
202	greg	2.1	case 'o': /* output file */
203			if (argv[i][2])
204			break;
205			outfile = argv[++i];
206			continue;
207	greg	2.53	}
208			else if (i >= argc-1)
209			break;
210	greg	2.1	rpargv[rpargc++] = argv[i];
211			}
212	greg	2.23	if (i >= argc) {
213			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
214			exit(1);
215			}
216	greg	2.1	if (outfile == NULL) {
217			fprintf(stderr, "%s: missing output file\n", argv[0]);
218			exit(1);
219			}
220			init(argc, argv);
221			rpiece();
222	greg	2.15	exit(cleanup(0));
223	greg	2.1	}
224
225
226	schorsch	2.43	static void
227			dolock( /* lock or unlock a file */
228			int fd,
229			int ltyp
230			)
231	greg	2.25	{
232			static struct flock fls; /* static so initialized to zeroes */
233
234			fls.l_type = ltyp;
235			if (fcntl(fd, F_SETLKW, &fls) < 0) {
236	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
237	greg	2.37	progname, strerror(errno));
238	greg	2.25	exit(1);
239			}
240			}
241
242
243	schorsch	2.43	static void
244			init( /* set up output file and start rpict */
245			int ac,
246			char **av
247			)
248	greg	2.1	{
249	greg	2.23	static char hrbuf[16], vrbuf[16];
250	greg	2.2	extern char VersionID[];
251	greg	2.1	char *err;
252			FILE *fp;
253			int hr, vr;
254	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
255	greg	2.1	/* set up view */
256			if ((err = setview(&ourview)) != NULL) {
257			fprintf(stderr, "%s: %s\n", progname, err);
258			exit(1);
259			}
260	greg	2.25	if (syncfp != NULL) {
261			sflock(F_RDLCK);
262			fscanf(syncfp, "%d %d", &hmult, &vmult);
263			sflock(F_UNLCK);
264	greg	2.5	}
265	greg	2.23	/* compute piece size */
266	greg	2.53	hr = hres; vr = vres;
267			if (pixaspect > FTINY)
268			normaspect(viewaspect(&ourview), &pixaspect, &hr, &vr);
269	greg	2.23	hres /= hmult;
270			vres /= vmult;
271	greg	2.46	if (hres <= 0 \|\| vres <= 0) {
272	greg	2.47	fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
273	greg	2.46	exit(1);
274			}
275	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
276	greg	2.53	if (!nowarn && (hr != hreshmult) \| (vr != vresvmult))
277			fprintf(stderr,
278			"%s: warning - resolution changed from %dx%d to %dx%d\n",
279			progname, hr, vr, hreshmult, vresvmult);
280	greg	2.23	sprintf(hrbuf, "%d", hres);
281			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
282			sprintf(vrbuf, "%d", vres);
283			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
284			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
285			rpargv[rpargc++] = av[ac-1];
286			rpargv[rpargc] = NULL;
287	greg	2.1	/* open output file */
288			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
289	greg	2.25	dolock(outfd, F_WRLCK);
290	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
291			goto filerr;
292	greg	2.29	newheader("RADIANCE", fp); /* create header */
293			printargs(ac, av, fp);
294	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
295	greg	2.1	fputs(VIEWSTR, fp);
296			fprintview(&ourview, fp);
297			putc('\n', fp);
298	greg	2.52	fputnow(fp);
299	greg	2.1	if (pixaspect < .99 \|\| pixaspect > 1.01)
300			fputaspect(pixaspect, fp);
301			fputformat(COLRFMT, fp);
302			putc('\n', fp);
303			fprtresolu(hreshmult, vresvmult, fp);
304			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
305	greg	2.25	dolock(outfd, F_RDLCK);
306	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
307			goto filerr;
308	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
309	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
310	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
311	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
312			progname, outfile);
313	greg	2.1	exit(1);
314			}
315			} else {
316	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
317			progname, outfile);
318	greg	2.1	exit(1);
319			}
320			scanorig = ftell(fp); /* record position of first scanline */
321			if (fclose(fp) == -1) /* done with stream i/o */
322			goto filerr;
323	greg	2.25	dolock(outfd, F_UNLCK);
324	greg	2.1	/* start rpict process */
325	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
326	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
327	greg	2.1	exit(1);
328			}
329	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
330			(torp = fdopen(rpd.w, "w")) == NULL) {
331	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
332			progname, rpargv[0]);
333			exit(1);
334			}
335	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
336	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
337			exit(1);
338			}
339	greg	2.6	signal(SIGALRM, onalrm);
340	greg	2.31	if (timelim)
341			alarm(timelim);
342	greg	2.1	return;
343			filerr:
344	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
345	greg	2.1	exit(1);
346			}
347
348
349	schorsch	2.43	static int
350			nextpiece( /* get next piece assignment */
351			int *xp,
352			int *yp
353			)
354	greg	2.5	{
355	greg	2.6	if (gotalrm) /* someone wants us to quit */
356			return(0);
357	greg	2.25	if (syncfp != NULL) { /* use sync file */
358			/*
359			* So we don't necessarily have to lock and unlock the file
360			* multiple times (very slow), we establish an exclusive
361			* lock at the beginning on our synchronization file and
362			* maintain it in the subroutine rvrpiece().
363			*/
364			sflock(F_WRLCK);
365			fseek(syncfp, 0L, 0); /* read position */
366			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
367	greg	2.8	*xp = hmult-1;
368			*yp = vmult;
369			}
370	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
371			rvrlim = xpvmult + *yp;
372			if (rvrpiece(xp, yp)) { /* do stragglers first */
373			sflock(F_UNLCK);
374			return(1);
375			}
376	greg	2.8	if (--(yp) < 0) { / decrement position */
377	greg	2.5	*yp = vmult-1;
378	greg	2.25	if (--(xp) < 0) { / all done */
379			sflock(F_UNLCK);
380	greg	2.5	return(0);
381			}
382			}
383	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
384			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
385			fflush(syncfp);
386			sflock(F_UNLCK); /* release sync file */
387	greg	2.5	return(1);
388			}
389	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
390	greg	2.5	}
391
392
393	schorsch	2.43	static int
394			rvrpiece( /* check for recoverable pieces */
395			register int *xp,
396			register int *yp
397			)
398	greg	2.25	{
399			static char pdone = NULL; / which pieces are done */
400			static long readpos = -1; /* how far we've read */
401			register int i;
402			/*
403			* This routine is called by nextpiece() with an
404			* exclusive lock on syncfp and the file pointer at the
405			* appropriate position to read in the finished pieces.
406			*/
407			if (rvrlim < 0)
408			return(0); /* only check if asked */
409			if (pdone == NULL) /* first call */
410			pdone = calloc(hmult*vmult, sizeof(char));
411	greg	2.30	if (pdone == NULL) {
412			fprintf(stderr, "%s: out of memory\n", progname);
413			exit(1);
414			}
415	greg	2.25	if (readpos != -1) /* mark what's been done */
416			fseek(syncfp, readpos, 0);
417			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
418			pdone[xpvmult+*yp] = 1;
419			if (!feof(syncfp)) {
420			fprintf(stderr, "%s: format error in sync file\n", progname);
421			exit(1);
422			}
423			readpos = ftell(syncfp);
424			i = hmultvmult; / find an unaccounted for piece */
425			while (i-- > rvrlim)
426			if (!pdone[i]) {
427			*xp = i / vmult;
428			*yp = i % vmult;
429			pdone[i] = 1; /* consider it done */
430			return(1);
431			}
432			rvrlim = -1; /* nothing left to recover */
433			free(pdone);
434			pdone = NULL;
435			return(0);
436			}
437
438
439	schorsch	2.43	static int
440			cleanup( /* close rpict process and clean up */
441			int rstat
442			)
443	greg	2.1	{
444	greg	2.10	int status;
445	greg	2.1
446	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
447	greg	2.1	fclose(torp);
448			fclose(fromrp);
449	greg	2.10	while (wait(&status) != -1)
450	greg	2.9	if (rstat == 0)
451			rstat = status>>8 & 0xff;
452			return(rstat);
453	greg	2.1	}
454
455
456	schorsch	2.43	static void
457			rpiece(void) /* render picture piece by piece */
458	greg	2.1	{
459			VIEW pview;
460			int xorg, yorg;
461	greg	2.11	/* compute view parameters */
462	schorsch	2.40	pview = ourview;
463	greg	2.11	switch (ourview.type) {
464			case VT_PER:
465	greg	2.48	pview.horiz = (2.180./PI)atan(
466			tan((PI/180./2.)*ourview.horiz)/hmult );
467			pview.vert = (2.180./PI)atan(
468			tan((PI/180./2.)*ourview.vert)/vmult );
469	greg	2.11	break;
470			case VT_PAR:
471			case VT_ANG:
472			pview.horiz = ourview.horiz / hmult;
473			pview.vert = ourview.vert / vmult;
474			break;
475	greg	2.32	case VT_CYL:
476			pview.horiz = ourview.horiz / hmult;
477	greg	2.48	pview.vert = (2.180./PI)atan(
478			tan((PI/180./2.)*ourview.vert)/vmult );
479	greg	2.32	break;
480	greg	2.11	case VT_HEM:
481	greg	2.48	pview.horiz = (2.180./PI)asin(
482			sin((PI/180./2.)*ourview.horiz)/hmult );
483			pview.vert = (2.180./PI)asin(
484			sin((PI/180./2.)*ourview.vert)/vmult );
485			break;
486			case VT_PLS:
487			pview.horiz = sin((PI/180./2.)*ourview.horiz) /
488			(1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
489			pview.horiz *= pview.horiz;
490			pview.horiz = (2.180./PI)acos((1. - pview.horiz) /
491			(1. + pview.horiz));
492			pview.vert = sin((PI/180./2.)*ourview.vert) /
493			(1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
494			pview.vert *= pview.vert;
495			pview.vert = (2.180./PI)acos((1. - pview.vert) /
496			(1. + pview.vert));
497	greg	2.11	break;
498			default:
499			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
500			progname, ourview.type);
501			exit(cleanup(1));
502			}
503			/* render each piece */
504	greg	2.5	while (nextpiece(&xorg, &yorg)) {
505	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
506			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
507	greg	2.1	fputs(VIEWSTR, torp);
508			fprintview(&pview, torp);
509			putc('\n', torp);
510	greg	2.11	fflush(torp); /* assigns piece to rpict */
511	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
512			}
513			}
514
515
516	schorsch	2.43	static int
517			putpiece( /* get next piece from rpict */
518			int xpos,
519			int ypos
520			)
521	greg	2.1	{
522	greg	2.7	struct flock fls;
523	greg	2.9	int pid, status;
524	greg	2.1	int hr, vr;
525	greg	2.8	register int y;
526			/* check bounds */
527	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
528	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
529			progname, xpos, ypos);
530	greg	2.10	exit(cleanup(1));
531	greg	2.5	}
532	greg	2.8	/* check header from rpict */
533	greg	2.18	guard_io();
534	greg	2.13	getheader(fromrp, NULL, NULL);
535	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
536	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
537			progname, rpargv[0]);
538	greg	2.10	exit(cleanup(1));
539	greg	2.1	}
540	greg	2.24	if (verbose) { /* notify caller */
541			printf("%d %d begun\n", xpos, ypos);
542			fflush(stdout);
543			}
544	greg	2.18	unguard();
545	greg	2.8	/* load new piece into buffer */
546	greg	2.18	for (y = 0; y < vr; y++) {
547			guard_io();
548	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
549	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
550			progname, rpargv[0]);
551	greg	2.10	exit(cleanup(1));
552	greg	2.1	}
553	greg	2.18	unguard();
554			}
555	greg	2.9	#if MAXFORK
556			/* fork so we don't slow rpict down */
557			if ((pid = fork()) > 0) {
558	greg	2.10	if (++nforked >= MAXFORK) {
559	greg	2.9	wait(&status); /* reap a child */
560			if (status)
561	greg	2.10	exit(cleanup(status>>8 & 0xff));
562	greg	2.9	nforked--;
563			}
564			return(pid);
565			}
566			#else
567			pid = -1; /* no forking */
568			#endif
569	greg	2.19	fls.l_start = scanorig +
570			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
571	greg	2.12	#if NFS
572	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
573	greg	2.8	/* lock file section so NFS doesn't mess up */
574			fls.l_whence = 0;
575			fls.l_type = F_WRLCK;
576	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
577			filerr("lock");
578	greg	2.12	#endif
579	greg	2.8	/* write new piece to file */
580	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
581	greg	2.26	filerr("seek");
582	greg	2.9	if (hmult == 1) {
583			if (writebuf(outfd, (char *)pbuf,
584			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
585	greg	2.26	filerr("write");
586	greg	2.9	} else
587			for (y = 0; y < vr; y++) {
588			if (writebuf(outfd, (char )(pbuf+yhr),
589			hrsizeof(COLR)) != hrsizeof(COLR))
590	greg	2.26	filerr("write");
591	greg	2.9	if (y < vr-1 && lseek(outfd,
592	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
593	greg	2.42	SEEK_CUR) < 0)
594	greg	2.26	filerr("seek");
595	greg	2.1	}
596	greg	2.25	#if NFS
597			fls.l_type = F_UNLCK; /* release lock */
598	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
599			filerr("lock");
600	greg	2.25	#endif
601	greg	2.32	if (verbose) { /* notify caller */
602			printf("%d %d done\n", xpos, ypos);
603			fflush(stdout);
604			}
605	greg	2.25	if (syncfp != NULL) { /* record what's been done */
606			sflock(F_WRLCK);
607			fseek(syncfp, 0L, 2); /* append index */
608			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
609			fflush(syncfp);
610			/*** Unlock not necessary, since
611			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
612	greg	2.20	}
613	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
614	greg	2.9	return(0);
615	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
616	greg	2.26	}
617
618
619	schorsch	2.43	static void
620			filerr( /* report file error and exit */
621			char *t
622			)
623	greg	2.26	{
624			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
625	greg	2.37	progname, t, outfile, strerror(errno));
626	greg	2.9	_exit(1);
627	greg	2.1	}
628	greg	2.16
629			#endif