src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.43 2004/03/26 21:36:20 schorsch Exp $";
#endif
/*
 * Generate sections of a picture.
 */
 

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

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

#ifndef F_SETLKW

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

#else

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

extern char  *strerror();

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

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

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

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

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


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


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

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


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


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


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


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

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


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


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


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

#endif
Revision:	2.44
Committed:	Tue Jun 8 19:48:31 2004 UTC (19 years, 10 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R6
Changes since 2.43:	+2 -3 lines
Log Message:	Removed redundant #include's and fixed ordering on some headers
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.44	static const char RCSid[] = "$Id: rpiece.c,v 2.43 2004/03/26 21:36:20 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			#include <sys/wait.h>
13
14	greg	2.42	#include "platform.h"
15	greg	2.44	#include "standard.h"
16	schorsch	2.43	#include "color.h"
17			#include "view.h"
18			#include "rtprocess.h"
19	greg	2.16
20			#ifndef F_SETLKW
21
22	schorsch	2.43	int
23			main(
24			int argc,
25			char *argv[]
26			)
27	greg	2.16	{
28			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
29			exit(1);
30			}
31
32			#else
33
34	greg	2.12	#ifndef NFS
35			#define NFS 1
36			#endif
37	greg	2.9	/* set the following to 0 to forgo forking */
38			#ifndef MAXFORK
39	greg	2.12	#if NFS
40	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
41	greg	2.12	#else
42			#define MAXFORK 0
43	greg	2.9	#endif
44	greg	2.12	#endif
45	greg	2.18	/* protection from SYSV signals(!) */
46	greg	2.27	#if defined(sgi)
47	greg	2.18	#define guard_io() sighold(SIGALRM)
48			#define unguard() sigrelse(SIGALRM)
49			#endif
50			#ifndef guard_io
51	schorsch	2.43	#define guard_io()
52			#define unguard()
53	greg	2.18	#endif
54	gregl	2.34
55	greg	2.37	extern char *strerror();
56	gregl	2.34
57	greg	2.1	/* rpict command */
58	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
59			int rpargc = 3;
60	greg	2.1	FILE torp, fromrp;
61	greg	2.8	COLR *pbuf;
62	greg	2.1	/* our view parameters */
63			VIEW ourview = STDVIEW;
64	greg	2.4	double pixaspect = 1.0;
65	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
66	greg	2.1	/* output file */
67			char *outfile = NULL;
68			int outfd;
69			long scanorig;
70	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
71			int synclst = F_UNLCK; /* synchronization file lock status */
72	greg	2.9	int nforked = 0;
73	greg	2.1
74	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
75
76	greg	2.1	char *progname;
77			int verbose = 0;
78	greg	2.31	unsigned timelim = 0;
79	greg	2.25	int rvrlim = -1;
80	greg	2.1
81	greg	2.6	int gotalrm = 0;
82	schorsch	2.38	void onalrm(int i) { gotalrm++; }
83	greg	2.1
84	schorsch	2.43	static void dolock(int fd, int ltyp);
85			static void init(int ac, char **av);
86			static int nextpiece(int xp, int yp);
87			static int rvrpiece(int xp, int yp);
88			static int cleanup(int rstat);
89			static void rpiece(void);
90			static int putpiece(int xpos, int ypos);
91			static void filerr(char *t);
92	greg	2.6
93	schorsch	2.43
94			int
95			main(
96			int argc,
97			char *argv[]
98			)
99	greg	2.1	{
100			register int i, rval;
101
102			progname = argv[0];
103			for (i = 1; i < argc; i++) {
104	greg	2.22	/* expand arguments */
105	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
106			;
107			if (rval < 0) {
108			fprintf(stderr, "%s: cannot expand '%s'",
109			argv[0], argv[i]);
110			exit(1);
111			}
112	greg	2.1	if (argv[i][0] == '-')
113			switch (argv[i][1]) {
114			case 'v':
115			switch (argv[i][2]) {
116			case '\0': /* verbose option */
117			verbose = !verbose;
118			continue;
119			case 'f': /* view file */
120			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
121			fprintf(stderr,
122			"%s: not a view file\n", argv[i]);
123			exit(1);
124			}
125			continue;
126			default: /* view option? */
127			rval = getviewopt(&ourview, argc-i, argv+i);
128			if (rval >= 0) {
129			i += rval;
130			continue;
131			}
132			break;
133			}
134			break;
135			case 'p': /* pixel aspect ratio? */
136	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
137			break;
138	gregl	2.35	pixaspect = atof(argv[++i]);
139	greg	2.23	continue;
140	greg	2.31	case 'T': /* time limit (hours) */
141			if (argv[i][2])
142			break;
143			timelim = atof(argv[++i])*3600. + .5;
144			break;
145	greg	2.23	case 'x': /* overall x resolution */
146			if (argv[i][2])
147			break;
148			hres = atoi(argv[++i]);
149			continue;
150			case 'y': /* overall y resolution */
151			if (argv[i][2])
152			break;
153			vres = atoi(argv[++i]);
154			continue;
155	greg	2.1	case 'X': /* horizontal multiplier */
156			if (argv[i][2])
157			break;
158			hmult = atoi(argv[++i]);
159			continue;
160			case 'Y': /* vertical multiplier */
161			if (argv[i][2])
162			break;
163			vmult = atoi(argv[++i]);
164			continue;
165	greg	2.25	case 'R': /* recover */
166			if (argv[i][2])
167			break;
168			rvrlim = 0;
169			/* fall through */
170	greg	2.5	case 'F': /* syncronization file */
171			if (argv[i][2])
172			break;
173	greg	2.28	if ((syncfp =
174			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
175	greg	2.5	fprintf(stderr, "%s: cannot open\n",
176			argv[i]);
177			exit(1);
178			}
179			continue;
180	greg	2.15	case 'z': /* z-file ist verbotten */
181			fprintf(stderr, "%s: -z option not allowed\n",
182			argv[0]);
183			exit(1);
184	greg	2.1	case 'o': /* output file */
185			if (argv[i][2])
186			break;
187			outfile = argv[++i];
188			continue;
189	greg	2.23	} else if (i >= argc-1)
190			break;
191	greg	2.1	rpargv[rpargc++] = argv[i];
192			}
193	greg	2.23	if (i >= argc) {
194			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
195			exit(1);
196			}
197	greg	2.1	if (outfile == NULL) {
198			fprintf(stderr, "%s: missing output file\n", argv[0]);
199			exit(1);
200			}
201			init(argc, argv);
202			rpiece();
203	greg	2.15	exit(cleanup(0));
204	greg	2.1	}
205
206
207	schorsch	2.43	static void
208			dolock( /* lock or unlock a file */
209			int fd,
210			int ltyp
211			)
212	greg	2.25	{
213			static struct flock fls; /* static so initialized to zeroes */
214
215			fls.l_type = ltyp;
216			if (fcntl(fd, F_SETLKW, &fls) < 0) {
217	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
218	greg	2.37	progname, strerror(errno));
219	greg	2.25	exit(1);
220			}
221			}
222
223
224	schorsch	2.43	static void
225			init( /* set up output file and start rpict */
226			int ac,
227			char **av
228			)
229	greg	2.1	{
230	greg	2.23	static char hrbuf[16], vrbuf[16];
231	greg	2.2	extern char VersionID[];
232	greg	2.1	char *err;
233			FILE *fp;
234			int hr, vr;
235	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
236	greg	2.1	/* set up view */
237			if ((err = setview(&ourview)) != NULL) {
238			fprintf(stderr, "%s: %s\n", progname, err);
239			exit(1);
240			}
241	greg	2.25	if (syncfp != NULL) {
242			sflock(F_RDLCK);
243			fscanf(syncfp, "%d %d", &hmult, &vmult);
244			sflock(F_UNLCK);
245	greg	2.5	}
246	greg	2.23	/* compute piece size */
247			hres /= hmult;
248			vres /= vmult;
249	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
250	greg	2.23	sprintf(hrbuf, "%d", hres);
251			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
252			sprintf(vrbuf, "%d", vres);
253			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
254			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
255			rpargv[rpargc++] = av[ac-1];
256			rpargv[rpargc] = NULL;
257	greg	2.1	/* open output file */
258			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
259	greg	2.25	dolock(outfd, F_WRLCK);
260	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
261			goto filerr;
262	greg	2.29	newheader("RADIANCE", fp); /* create header */
263			printargs(ac, av, fp);
264	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
265	greg	2.1	fputs(VIEWSTR, fp);
266			fprintview(&ourview, fp);
267			putc('\n', fp);
268			if (pixaspect < .99 \|\| pixaspect > 1.01)
269			fputaspect(pixaspect, fp);
270			fputformat(COLRFMT, fp);
271			putc('\n', fp);
272			fprtresolu(hreshmult, vresvmult, fp);
273			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
274	greg	2.25	dolock(outfd, F_RDLCK);
275	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
276			goto filerr;
277	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
278	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
279	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
280	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
281			progname, outfile);
282	greg	2.1	exit(1);
283			}
284			} else {
285	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
286			progname, outfile);
287	greg	2.1	exit(1);
288			}
289			scanorig = ftell(fp); /* record position of first scanline */
290			if (fclose(fp) == -1) /* done with stream i/o */
291			goto filerr;
292	greg	2.25	dolock(outfd, F_UNLCK);
293	greg	2.1	/* start rpict process */
294	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
295	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
296	greg	2.1	exit(1);
297			}
298	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
299			(torp = fdopen(rpd.w, "w")) == NULL) {
300	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
301			progname, rpargv[0]);
302			exit(1);
303			}
304	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
305	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
306			exit(1);
307			}
308	greg	2.6	signal(SIGALRM, onalrm);
309	greg	2.31	if (timelim)
310			alarm(timelim);
311	greg	2.1	return;
312			filerr:
313	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
314	greg	2.1	exit(1);
315			}
316
317
318	schorsch	2.43	static int
319			nextpiece( /* get next piece assignment */
320			int *xp,
321			int *yp
322			)
323	greg	2.5	{
324	greg	2.6	if (gotalrm) /* someone wants us to quit */
325			return(0);
326	greg	2.25	if (syncfp != NULL) { /* use sync file */
327			/*
328			* So we don't necessarily have to lock and unlock the file
329			* multiple times (very slow), we establish an exclusive
330			* lock at the beginning on our synchronization file and
331			* maintain it in the subroutine rvrpiece().
332			*/
333			sflock(F_WRLCK);
334			fseek(syncfp, 0L, 0); /* read position */
335			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
336	greg	2.8	*xp = hmult-1;
337			*yp = vmult;
338			}
339	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
340			rvrlim = xpvmult + *yp;
341			if (rvrpiece(xp, yp)) { /* do stragglers first */
342			sflock(F_UNLCK);
343			return(1);
344			}
345	greg	2.8	if (--(yp) < 0) { / decrement position */
346	greg	2.5	*yp = vmult-1;
347	greg	2.25	if (--(xp) < 0) { / all done */
348			sflock(F_UNLCK);
349	greg	2.5	return(0);
350			}
351			}
352	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
353			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
354			fflush(syncfp);
355			sflock(F_UNLCK); /* release sync file */
356	greg	2.5	return(1);
357			}
358	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
359	greg	2.5	}
360
361
362	schorsch	2.43	static int
363			rvrpiece( /* check for recoverable pieces */
364			register int *xp,
365			register int *yp
366			)
367	greg	2.25	{
368			static char pdone = NULL; / which pieces are done */
369			static long readpos = -1; /* how far we've read */
370			register int i;
371			/*
372			* This routine is called by nextpiece() with an
373			* exclusive lock on syncfp and the file pointer at the
374			* appropriate position to read in the finished pieces.
375			*/
376			if (rvrlim < 0)
377			return(0); /* only check if asked */
378			if (pdone == NULL) /* first call */
379			pdone = calloc(hmult*vmult, sizeof(char));
380	greg	2.30	if (pdone == NULL) {
381			fprintf(stderr, "%s: out of memory\n", progname);
382			exit(1);
383			}
384	greg	2.25	if (readpos != -1) /* mark what's been done */
385			fseek(syncfp, readpos, 0);
386			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
387			pdone[xpvmult+*yp] = 1;
388			if (!feof(syncfp)) {
389			fprintf(stderr, "%s: format error in sync file\n", progname);
390			exit(1);
391			}
392			readpos = ftell(syncfp);
393			i = hmultvmult; / find an unaccounted for piece */
394			while (i-- > rvrlim)
395			if (!pdone[i]) {
396			*xp = i / vmult;
397			*yp = i % vmult;
398			pdone[i] = 1; /* consider it done */
399			return(1);
400			}
401			rvrlim = -1; /* nothing left to recover */
402			free(pdone);
403			pdone = NULL;
404			return(0);
405			}
406
407
408	schorsch	2.43	static int
409			cleanup( /* close rpict process and clean up */
410			int rstat
411			)
412	greg	2.1	{
413	greg	2.10	int status;
414	greg	2.1
415	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
416	greg	2.1	fclose(torp);
417			fclose(fromrp);
418	greg	2.10	while (wait(&status) != -1)
419	greg	2.9	if (rstat == 0)
420			rstat = status>>8 & 0xff;
421			return(rstat);
422	greg	2.1	}
423
424
425	schorsch	2.43	static void
426			rpiece(void) /* render picture piece by piece */
427	greg	2.1	{
428			VIEW pview;
429			int xorg, yorg;
430	greg	2.11	/* compute view parameters */
431	schorsch	2.40	pview = ourview;
432	greg	2.11	switch (ourview.type) {
433			case VT_PER:
434			pview.horiz = 2.180./PIatan(
435			tan(PI/180./2.*ourview.horiz)/hmult );
436			pview.vert = 2.180./PIatan(
437			tan(PI/180./2.*ourview.vert)/vmult );
438			break;
439			case VT_PAR:
440			case VT_ANG:
441			pview.horiz = ourview.horiz / hmult;
442			pview.vert = ourview.vert / vmult;
443			break;
444	greg	2.32	case VT_CYL:
445			pview.horiz = ourview.horiz / hmult;
446			pview.vert = 2.180./PIatan(
447			tan(PI/180./2.*ourview.vert)/vmult );
448			break;
449	greg	2.11	case VT_HEM:
450			pview.horiz = 2.180./PIasin(
451			sin(PI/180./2.*ourview.horiz)/hmult );
452			pview.vert = 2.180./PIasin(
453			sin(PI/180./2.*ourview.vert)/vmult );
454			break;
455			default:
456			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
457			progname, ourview.type);
458			exit(cleanup(1));
459			}
460			/* render each piece */
461	greg	2.5	while (nextpiece(&xorg, &yorg)) {
462	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
463			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
464	greg	2.1	fputs(VIEWSTR, torp);
465			fprintview(&pview, torp);
466			putc('\n', torp);
467	greg	2.11	fflush(torp); /* assigns piece to rpict */
468	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
469			}
470			}
471
472
473	schorsch	2.43	static int
474			putpiece( /* get next piece from rpict */
475			int xpos,
476			int ypos
477			)
478	greg	2.1	{
479	greg	2.7	struct flock fls;
480	greg	2.9	int pid, status;
481	greg	2.1	int hr, vr;
482	greg	2.8	register int y;
483			/* check bounds */
484	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
485	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
486			progname, xpos, ypos);
487	greg	2.10	exit(cleanup(1));
488	greg	2.5	}
489	greg	2.8	/* check header from rpict */
490	greg	2.18	guard_io();
491	greg	2.13	getheader(fromrp, NULL, NULL);
492	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
493	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
494			progname, rpargv[0]);
495	greg	2.10	exit(cleanup(1));
496	greg	2.1	}
497	greg	2.24	if (verbose) { /* notify caller */
498			printf("%d %d begun\n", xpos, ypos);
499			fflush(stdout);
500			}
501	greg	2.18	unguard();
502	greg	2.8	/* load new piece into buffer */
503	greg	2.18	for (y = 0; y < vr; y++) {
504			guard_io();
505	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
506	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
507			progname, rpargv[0]);
508	greg	2.10	exit(cleanup(1));
509	greg	2.1	}
510	greg	2.18	unguard();
511			}
512	greg	2.9	#if MAXFORK
513			/* fork so we don't slow rpict down */
514			if ((pid = fork()) > 0) {
515	greg	2.10	if (++nforked >= MAXFORK) {
516	greg	2.9	wait(&status); /* reap a child */
517			if (status)
518	greg	2.10	exit(cleanup(status>>8 & 0xff));
519	greg	2.9	nforked--;
520			}
521			return(pid);
522			}
523			#else
524			pid = -1; /* no forking */
525			#endif
526	greg	2.19	fls.l_start = scanorig +
527			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
528	greg	2.12	#if NFS
529	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
530	greg	2.8	/* lock file section so NFS doesn't mess up */
531			fls.l_whence = 0;
532			fls.l_type = F_WRLCK;
533	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
534			filerr("lock");
535	greg	2.12	#endif
536	greg	2.8	/* write new piece to file */
537	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
538	greg	2.26	filerr("seek");
539	greg	2.9	if (hmult == 1) {
540			if (writebuf(outfd, (char *)pbuf,
541			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
542	greg	2.26	filerr("write");
543	greg	2.9	} else
544			for (y = 0; y < vr; y++) {
545			if (writebuf(outfd, (char )(pbuf+yhr),
546			hrsizeof(COLR)) != hrsizeof(COLR))
547	greg	2.26	filerr("write");
548	greg	2.9	if (y < vr-1 && lseek(outfd,
549	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
550	greg	2.42	SEEK_CUR) < 0)
551	greg	2.26	filerr("seek");
552	greg	2.1	}
553	greg	2.25	#if NFS
554			fls.l_type = F_UNLCK; /* release lock */
555	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
556			filerr("lock");
557	greg	2.25	#endif
558	greg	2.32	if (verbose) { /* notify caller */
559			printf("%d %d done\n", xpos, ypos);
560			fflush(stdout);
561			}
562	greg	2.25	if (syncfp != NULL) { /* record what's been done */
563			sflock(F_WRLCK);
564			fseek(syncfp, 0L, 2); /* append index */
565			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
566			fflush(syncfp);
567			/*** Unlock not necessary, since
568			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
569	greg	2.20	}
570	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
571	greg	2.9	return(0);
572	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
573	greg	2.26	}
574
575
576	schorsch	2.43	static void
577			filerr( /* report file error and exit */
578			char *t
579			)
580	greg	2.26	{
581			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
582	greg	2.37	progname, t, outfile, strerror(errno));
583	greg	2.9	_exit(1);
584	greg	2.1	}
585	greg	2.16
586			#endif