src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.49 2008/04/24 10:28:25 schorsch 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;
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 'v':
                                switch (argv[i][2]) {
                                case '\0':      /* verbose option */
                                        verbose = !verbose;
                                        continue;
                                case 'f':       /* view file */
                                        if (viewfile(argv[++i], &ourview, NULL) <= 0) {
                                                fprintf(stderr,
                                        "%s: not a view file\n", argv[i]);
                                                exit(1);
                                        }
                                        continue;
                                default:        /* view option? */
                                        rval = getviewopt(&ourview, argc-i, argv+i);
                                        if (rval >= 0) {
                                                i += rval;
                                                continue;
                                        }
                                        break;
                                }
                                break;
                        case 'p':               /* pixel aspect ratio? */
                                if (argv[i][2] != 'a' || argv[i][3])
                                        break;
                                pixaspect = atof(argv[++i]);
                                continue;
                        case 'T':               /* time limit (hours) */
                                if (argv[i][2])
                                        break;
                                timelim = atof(argv[++i])*3600. + .5;
                                break;
                        case 'x':               /* overall x resolution */
                                if (argv[i][2])
                                        break;
                                hres = atoi(argv[++i]);
                                continue;
                        case 'y':               /* overall y resolution */
                                if (argv[i][2])
                                        break;
                                vres = atoi(argv[++i]);
                                continue;
                        case 'X':               /* horizontal multiplier */
                                if (argv[i][2])
                                        break;
                                hmult = atoi(argv[++i]);
                                continue;
                        case 'Y':               /* vertical multiplier */
                                if (argv[i][2])
                                        break;
                                vmult = atoi(argv[++i]);
                                continue;
                        case 'R':               /* recover */
                                if (argv[i][2])
                                        break;
                                rvrlim = 0;
                        /* fall through */
                        case 'F':               /* syncronization file */
                                if (argv[i][2])
                                        break;
                                if ((syncfp =
                fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
                                        fprintf(stderr, "%s: cannot open\n",
                                                        argv[i]);
                                        exit(1);
                                }
                                continue;
                        case 'z':               /* z-file ist verbotten */
                                fprintf(stderr, "%s: -z option not allowed\n",
                                                argv[0]);
                                exit(1);
                        case 'o':               /* output file */
                                if (argv[i][2])
                                        break;
                                outfile = argv[++i];
                                continue;
                        } else if (i >= argc-1)
                                break;
                rpargv[rpargc++] = argv[i];
        }
        if (i >= argc) {
                fprintf(stderr, "%s: missing octree argument\n", argv[0]);
                exit(1);
        }
        if (outfile == NULL) {
                fprintf(stderr, "%s: missing output file\n", argv[0]);
                exit(1);
        }
        init(argc, argv);
        rpiece();
        exit(cleanup(0));
}


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

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


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


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


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


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

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


static void
rpiece(void)                    /* render picture piece by piece */
{
        VIEW  pview;
        int  xorg, yorg;
                                        /* compute view parameters */
        pview = ourview;
        switch (ourview.type) {
        case VT_PER:
                pview.horiz = (2.*180./PI)*atan(
                                tan((PI/180./2.)*ourview.horiz)/hmult );
                pview.vert = (2.*180./PI)*atan(
                                tan((PI/180./2.)*ourview.vert)/vmult );
                break;
        case VT_PAR:
        case VT_ANG:
                pview.horiz = ourview.horiz / hmult;
                pview.vert = ourview.vert / vmult;
                break;
        case VT_CYL:
                pview.horiz = ourview.horiz / hmult;
                pview.vert = (2.*180./PI)*atan(
                                tan((PI/180./2.)*ourview.vert)/vmult );
                break;
        case VT_HEM:
                pview.horiz = (2.*180./PI)*asin(
                                sin((PI/180./2.)*ourview.horiz)/hmult );
                pview.vert = (2.*180./PI)*asin(
                                sin((PI/180./2.)*ourview.vert)/vmult );
                break;
        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:	2.50
Committed:	Sat Feb 7 05:40:47 2009 UTC (15 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R0
Changes since 2.49:	+2 -2 lines
Log Message:	Added missing newline to error statement
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.50	static const char RCSid[] = "$Id: rpiece.c,v 2.49 2008/04/24 10:28:25 schorsch 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	2.31	unsigned timelim = 0;
82	greg	2.25	int rvrlim = -1;
83	greg	2.1
84	greg	2.6	int gotalrm = 0;
85	schorsch	2.38	void onalrm(int i) { gotalrm++; }
86	greg	2.1
87	schorsch	2.43	static void dolock(int fd, int ltyp);
88			static void init(int ac, char **av);
89			static int nextpiece(int xp, int yp);
90			static int rvrpiece(int xp, int yp);
91			static int cleanup(int rstat);
92			static void rpiece(void);
93			static int putpiece(int xpos, int ypos);
94			static void filerr(char *t);
95	greg	2.6
96	schorsch	2.43
97			int
98			main(
99			int argc,
100			char *argv[]
101			)
102	greg	2.1	{
103			register int i, rval;
104
105			progname = argv[0];
106			for (i = 1; i < argc; i++) {
107	greg	2.22	/* expand arguments */
108	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
109			;
110			if (rval < 0) {
111	greg	2.50	fprintf(stderr, "%s: cannot expand '%s'\n",
112	greg	2.37	argv[0], argv[i]);
113			exit(1);
114			}
115	greg	2.1	if (argv[i][0] == '-')
116			switch (argv[i][1]) {
117			case 'v':
118			switch (argv[i][2]) {
119			case '\0': /* verbose option */
120			verbose = !verbose;
121			continue;
122			case 'f': /* view file */
123			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
124			fprintf(stderr,
125			"%s: not a view file\n", argv[i]);
126			exit(1);
127			}
128			continue;
129			default: /* view option? */
130			rval = getviewopt(&ourview, argc-i, argv+i);
131			if (rval >= 0) {
132			i += rval;
133			continue;
134			}
135			break;
136			}
137			break;
138			case 'p': /* pixel aspect ratio? */
139	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
140			break;
141	gregl	2.35	pixaspect = atof(argv[++i]);
142	greg	2.23	continue;
143	greg	2.31	case 'T': /* time limit (hours) */
144			if (argv[i][2])
145			break;
146			timelim = atof(argv[++i])*3600. + .5;
147			break;
148	greg	2.23	case 'x': /* overall x resolution */
149			if (argv[i][2])
150			break;
151			hres = atoi(argv[++i]);
152			continue;
153			case 'y': /* overall y resolution */
154			if (argv[i][2])
155			break;
156			vres = atoi(argv[++i]);
157			continue;
158	greg	2.1	case 'X': /* horizontal multiplier */
159			if (argv[i][2])
160			break;
161			hmult = atoi(argv[++i]);
162			continue;
163			case 'Y': /* vertical multiplier */
164			if (argv[i][2])
165			break;
166			vmult = atoi(argv[++i]);
167			continue;
168	greg	2.25	case 'R': /* recover */
169			if (argv[i][2])
170			break;
171			rvrlim = 0;
172			/* fall through */
173	greg	2.5	case 'F': /* syncronization file */
174			if (argv[i][2])
175			break;
176	greg	2.28	if ((syncfp =
177			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
178	greg	2.5	fprintf(stderr, "%s: cannot open\n",
179			argv[i]);
180			exit(1);
181			}
182			continue;
183	greg	2.15	case 'z': /* z-file ist verbotten */
184			fprintf(stderr, "%s: -z option not allowed\n",
185			argv[0]);
186			exit(1);
187	greg	2.1	case 'o': /* output file */
188			if (argv[i][2])
189			break;
190			outfile = argv[++i];
191			continue;
192	greg	2.23	} else if (i >= argc-1)
193			break;
194	greg	2.1	rpargv[rpargc++] = argv[i];
195			}
196	greg	2.23	if (i >= argc) {
197			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
198			exit(1);
199			}
200	greg	2.1	if (outfile == NULL) {
201			fprintf(stderr, "%s: missing output file\n", argv[0]);
202			exit(1);
203			}
204			init(argc, argv);
205			rpiece();
206	greg	2.15	exit(cleanup(0));
207	greg	2.1	}
208
209
210	schorsch	2.43	static void
211			dolock( /* lock or unlock a file */
212			int fd,
213			int ltyp
214			)
215	greg	2.25	{
216			static struct flock fls; /* static so initialized to zeroes */
217
218			fls.l_type = ltyp;
219			if (fcntl(fd, F_SETLKW, &fls) < 0) {
220	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
221	greg	2.37	progname, strerror(errno));
222	greg	2.25	exit(1);
223			}
224			}
225
226
227	schorsch	2.43	static void
228			init( /* set up output file and start rpict */
229			int ac,
230			char **av
231			)
232	greg	2.1	{
233	greg	2.23	static char hrbuf[16], vrbuf[16];
234	greg	2.2	extern char VersionID[];
235	greg	2.1	char *err;
236			FILE *fp;
237			int hr, vr;
238	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
239	greg	2.1	/* set up view */
240			if ((err = setview(&ourview)) != NULL) {
241			fprintf(stderr, "%s: %s\n", progname, err);
242			exit(1);
243			}
244	greg	2.25	if (syncfp != NULL) {
245			sflock(F_RDLCK);
246			fscanf(syncfp, "%d %d", &hmult, &vmult);
247			sflock(F_UNLCK);
248	greg	2.5	}
249	greg	2.23	/* compute piece size */
250			hres /= hmult;
251			vres /= vmult;
252	greg	2.46	if (hres <= 0 \|\| vres <= 0) {
253	greg	2.47	fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
254	greg	2.46	exit(1);
255			}
256	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
257	greg	2.23	sprintf(hrbuf, "%d", hres);
258			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
259			sprintf(vrbuf, "%d", vres);
260			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
261			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
262			rpargv[rpargc++] = av[ac-1];
263			rpargv[rpargc] = NULL;
264	greg	2.1	/* open output file */
265			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
266	greg	2.25	dolock(outfd, F_WRLCK);
267	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
268			goto filerr;
269	greg	2.29	newheader("RADIANCE", fp); /* create header */
270			printargs(ac, av, fp);
271	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
272	greg	2.1	fputs(VIEWSTR, fp);
273			fprintview(&ourview, fp);
274			putc('\n', fp);
275			if (pixaspect < .99 \|\| pixaspect > 1.01)
276			fputaspect(pixaspect, fp);
277			fputformat(COLRFMT, fp);
278			putc('\n', fp);
279			fprtresolu(hreshmult, vresvmult, fp);
280			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
281	greg	2.25	dolock(outfd, F_RDLCK);
282	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
283			goto filerr;
284	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
285	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
286	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
287	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
288			progname, outfile);
289	greg	2.1	exit(1);
290			}
291			} else {
292	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
293			progname, outfile);
294	greg	2.1	exit(1);
295			}
296			scanorig = ftell(fp); /* record position of first scanline */
297			if (fclose(fp) == -1) /* done with stream i/o */
298			goto filerr;
299	greg	2.25	dolock(outfd, F_UNLCK);
300	greg	2.1	/* start rpict process */
301	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
302	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
303	greg	2.1	exit(1);
304			}
305	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
306			(torp = fdopen(rpd.w, "w")) == NULL) {
307	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
308			progname, rpargv[0]);
309			exit(1);
310			}
311	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
312	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
313			exit(1);
314			}
315	greg	2.6	signal(SIGALRM, onalrm);
316	greg	2.31	if (timelim)
317			alarm(timelim);
318	greg	2.1	return;
319			filerr:
320	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
321	greg	2.1	exit(1);
322			}
323
324
325	schorsch	2.43	static int
326			nextpiece( /* get next piece assignment */
327			int *xp,
328			int *yp
329			)
330	greg	2.5	{
331	greg	2.6	if (gotalrm) /* someone wants us to quit */
332			return(0);
333	greg	2.25	if (syncfp != NULL) { /* use sync file */
334			/*
335			* So we don't necessarily have to lock and unlock the file
336			* multiple times (very slow), we establish an exclusive
337			* lock at the beginning on our synchronization file and
338			* maintain it in the subroutine rvrpiece().
339			*/
340			sflock(F_WRLCK);
341			fseek(syncfp, 0L, 0); /* read position */
342			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
343	greg	2.8	*xp = hmult-1;
344			*yp = vmult;
345			}
346	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
347			rvrlim = xpvmult + *yp;
348			if (rvrpiece(xp, yp)) { /* do stragglers first */
349			sflock(F_UNLCK);
350			return(1);
351			}
352	greg	2.8	if (--(yp) < 0) { / decrement position */
353	greg	2.5	*yp = vmult-1;
354	greg	2.25	if (--(xp) < 0) { / all done */
355			sflock(F_UNLCK);
356	greg	2.5	return(0);
357			}
358			}
359	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
360			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
361			fflush(syncfp);
362			sflock(F_UNLCK); /* release sync file */
363	greg	2.5	return(1);
364			}
365	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
366	greg	2.5	}
367
368
369	schorsch	2.43	static int
370			rvrpiece( /* check for recoverable pieces */
371			register int *xp,
372			register int *yp
373			)
374	greg	2.25	{
375			static char pdone = NULL; / which pieces are done */
376			static long readpos = -1; /* how far we've read */
377			register int i;
378			/*
379			* This routine is called by nextpiece() with an
380			* exclusive lock on syncfp and the file pointer at the
381			* appropriate position to read in the finished pieces.
382			*/
383			if (rvrlim < 0)
384			return(0); /* only check if asked */
385			if (pdone == NULL) /* first call */
386			pdone = calloc(hmult*vmult, sizeof(char));
387	greg	2.30	if (pdone == NULL) {
388			fprintf(stderr, "%s: out of memory\n", progname);
389			exit(1);
390			}
391	greg	2.25	if (readpos != -1) /* mark what's been done */
392			fseek(syncfp, readpos, 0);
393			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
394			pdone[xpvmult+*yp] = 1;
395			if (!feof(syncfp)) {
396			fprintf(stderr, "%s: format error in sync file\n", progname);
397			exit(1);
398			}
399			readpos = ftell(syncfp);
400			i = hmultvmult; / find an unaccounted for piece */
401			while (i-- > rvrlim)
402			if (!pdone[i]) {
403			*xp = i / vmult;
404			*yp = i % vmult;
405			pdone[i] = 1; /* consider it done */
406			return(1);
407			}
408			rvrlim = -1; /* nothing left to recover */
409			free(pdone);
410			pdone = NULL;
411			return(0);
412			}
413
414
415	schorsch	2.43	static int
416			cleanup( /* close rpict process and clean up */
417			int rstat
418			)
419	greg	2.1	{
420	greg	2.10	int status;
421	greg	2.1
422	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
423	greg	2.1	fclose(torp);
424			fclose(fromrp);
425	greg	2.10	while (wait(&status) != -1)
426	greg	2.9	if (rstat == 0)
427			rstat = status>>8 & 0xff;
428			return(rstat);
429	greg	2.1	}
430
431
432	schorsch	2.43	static void
433			rpiece(void) /* render picture piece by piece */
434	greg	2.1	{
435			VIEW pview;
436			int xorg, yorg;
437	greg	2.11	/* compute view parameters */
438	schorsch	2.40	pview = ourview;
439	greg	2.11	switch (ourview.type) {
440			case VT_PER:
441	greg	2.48	pview.horiz = (2.180./PI)atan(
442			tan((PI/180./2.)*ourview.horiz)/hmult );
443			pview.vert = (2.180./PI)atan(
444			tan((PI/180./2.)*ourview.vert)/vmult );
445	greg	2.11	break;
446			case VT_PAR:
447			case VT_ANG:
448			pview.horiz = ourview.horiz / hmult;
449			pview.vert = ourview.vert / vmult;
450			break;
451	greg	2.32	case VT_CYL:
452			pview.horiz = ourview.horiz / hmult;
453	greg	2.48	pview.vert = (2.180./PI)atan(
454			tan((PI/180./2.)*ourview.vert)/vmult );
455	greg	2.32	break;
456	greg	2.11	case VT_HEM:
457	greg	2.48	pview.horiz = (2.180./PI)asin(
458			sin((PI/180./2.)*ourview.horiz)/hmult );
459			pview.vert = (2.180./PI)asin(
460			sin((PI/180./2.)*ourview.vert)/vmult );
461			break;
462			case VT_PLS:
463			pview.horiz = sin((PI/180./2.)*ourview.horiz) /
464			(1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
465			pview.horiz *= pview.horiz;
466			pview.horiz = (2.180./PI)acos((1. - pview.horiz) /
467			(1. + pview.horiz));
468			pview.vert = sin((PI/180./2.)*ourview.vert) /
469			(1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
470			pview.vert *= pview.vert;
471			pview.vert = (2.180./PI)acos((1. - pview.vert) /
472			(1. + pview.vert));
473	greg	2.11	break;
474			default:
475			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
476			progname, ourview.type);
477			exit(cleanup(1));
478			}
479			/* render each piece */
480	greg	2.5	while (nextpiece(&xorg, &yorg)) {
481	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
482			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
483	greg	2.1	fputs(VIEWSTR, torp);
484			fprintview(&pview, torp);
485			putc('\n', torp);
486	greg	2.11	fflush(torp); /* assigns piece to rpict */
487	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
488			}
489			}
490
491
492	schorsch	2.43	static int
493			putpiece( /* get next piece from rpict */
494			int xpos,
495			int ypos
496			)
497	greg	2.1	{
498	greg	2.7	struct flock fls;
499	greg	2.9	int pid, status;
500	greg	2.1	int hr, vr;
501	greg	2.8	register int y;
502			/* check bounds */
503	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
504	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
505			progname, xpos, ypos);
506	greg	2.10	exit(cleanup(1));
507	greg	2.5	}
508	greg	2.8	/* check header from rpict */
509	greg	2.18	guard_io();
510	greg	2.13	getheader(fromrp, NULL, NULL);
511	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
512	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
513			progname, rpargv[0]);
514	greg	2.10	exit(cleanup(1));
515	greg	2.1	}
516	greg	2.24	if (verbose) { /* notify caller */
517			printf("%d %d begun\n", xpos, ypos);
518			fflush(stdout);
519			}
520	greg	2.18	unguard();
521	greg	2.8	/* load new piece into buffer */
522	greg	2.18	for (y = 0; y < vr; y++) {
523			guard_io();
524	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
525	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
526			progname, rpargv[0]);
527	greg	2.10	exit(cleanup(1));
528	greg	2.1	}
529	greg	2.18	unguard();
530			}
531	greg	2.9	#if MAXFORK
532			/* fork so we don't slow rpict down */
533			if ((pid = fork()) > 0) {
534	greg	2.10	if (++nforked >= MAXFORK) {
535	greg	2.9	wait(&status); /* reap a child */
536			if (status)
537	greg	2.10	exit(cleanup(status>>8 & 0xff));
538	greg	2.9	nforked--;
539			}
540			return(pid);
541			}
542			#else
543			pid = -1; /* no forking */
544			#endif
545	greg	2.19	fls.l_start = scanorig +
546			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
547	greg	2.12	#if NFS
548	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
549	greg	2.8	/* lock file section so NFS doesn't mess up */
550			fls.l_whence = 0;
551			fls.l_type = F_WRLCK;
552	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
553			filerr("lock");
554	greg	2.12	#endif
555	greg	2.8	/* write new piece to file */
556	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
557	greg	2.26	filerr("seek");
558	greg	2.9	if (hmult == 1) {
559			if (writebuf(outfd, (char *)pbuf,
560			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
561	greg	2.26	filerr("write");
562	greg	2.9	} else
563			for (y = 0; y < vr; y++) {
564			if (writebuf(outfd, (char )(pbuf+yhr),
565			hrsizeof(COLR)) != hrsizeof(COLR))
566	greg	2.26	filerr("write");
567	greg	2.9	if (y < vr-1 && lseek(outfd,
568	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
569	greg	2.42	SEEK_CUR) < 0)
570	greg	2.26	filerr("seek");
571	greg	2.1	}
572	greg	2.25	#if NFS
573			fls.l_type = F_UNLCK; /* release lock */
574	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
575			filerr("lock");
576	greg	2.25	#endif
577	greg	2.32	if (verbose) { /* notify caller */
578			printf("%d %d done\n", xpos, ypos);
579			fflush(stdout);
580			}
581	greg	2.25	if (syncfp != NULL) { /* record what's been done */
582			sflock(F_WRLCK);
583			fseek(syncfp, 0L, 2); /* append index */
584			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
585			fflush(syncfp);
586			/*** Unlock not necessary, since
587			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
588	greg	2.20	}
589	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
590	greg	2.9	return(0);
591	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
592	greg	2.26	}
593
594
595	schorsch	2.43	static void
596			filerr( /* report file error and exit */
597			char *t
598			)
599	greg	2.26	{
600			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
601	greg	2.37	progname, t, outfile, strerror(errno));
602	greg	2.9	_exit(1);
603	greg	2.1	}
604	greg	2.16
605			#endif