src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.42 2003/10/20 16:01:55 greg 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 "rtio.h"
#include "rtmisc.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:	2.43
Committed:	Fri Mar 26 21:36:20 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.42:	+68 -37 lines
Log Message:	Continued ANSIfication.
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.43	static const char RCSid[] = "$Id: rpiece.c,v 2.42 2003/10/20 16:01:55 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			#include <sys/wait.h>
13
14	greg	2.42	#include "platform.h"
15	schorsch	2.43	#include "rtio.h"
16			#include "rtmisc.h"
17			#include "color.h"
18			#include "view.h"
19			#include "rtprocess.h"
20	greg	2.16
21			#ifndef F_SETLKW
22
23	schorsch	2.43	int
24			main(
25			int argc,
26			char *argv[]
27			)
28	greg	2.16	{
29			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
30			exit(1);
31			}
32
33			#else
34
35	greg	2.12	#ifndef NFS
36			#define NFS 1
37			#endif
38	greg	2.9	/* set the following to 0 to forgo forking */
39			#ifndef MAXFORK
40	greg	2.12	#if NFS
41	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
42	greg	2.12	#else
43			#define MAXFORK 0
44	greg	2.9	#endif
45	greg	2.12	#endif
46	greg	2.18	/* protection from SYSV signals(!) */
47	greg	2.27	#if defined(sgi)
48	greg	2.18	#define guard_io() sighold(SIGALRM)
49			#define unguard() sigrelse(SIGALRM)
50			#endif
51			#ifndef guard_io
52	schorsch	2.43	#define guard_io()
53			#define unguard()
54	greg	2.18	#endif
55	gregl	2.34
56	greg	2.37	extern char *strerror();
57	gregl	2.34
58	greg	2.1	/* rpict command */
59	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
60			int rpargc = 3;
61	greg	2.1	FILE torp, fromrp;
62	greg	2.8	COLR *pbuf;
63	greg	2.1	/* our view parameters */
64			VIEW ourview = STDVIEW;
65	greg	2.4	double pixaspect = 1.0;
66	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
67	greg	2.1	/* output file */
68			char *outfile = NULL;
69			int outfd;
70			long scanorig;
71	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
72			int synclst = F_UNLCK; /* synchronization file lock status */
73	greg	2.9	int nforked = 0;
74	greg	2.1
75	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
76
77	greg	2.1	char *progname;
78			int verbose = 0;
79	greg	2.31	unsigned timelim = 0;
80	greg	2.25	int rvrlim = -1;
81	greg	2.1
82	greg	2.6	int gotalrm = 0;
83	schorsch	2.38	void onalrm(int i) { gotalrm++; }
84	greg	2.1
85	schorsch	2.43	static void dolock(int fd, int ltyp);
86			static void init(int ac, char **av);
87			static int nextpiece(int xp, int yp);
88			static int rvrpiece(int xp, int yp);
89			static int cleanup(int rstat);
90			static void rpiece(void);
91			static int putpiece(int xpos, int ypos);
92			static void filerr(char *t);
93	greg	2.6
94	schorsch	2.43
95			int
96			main(
97			int argc,
98			char *argv[]
99			)
100	greg	2.1	{
101			register int i, rval;
102
103			progname = argv[0];
104			for (i = 1; i < argc; i++) {
105	greg	2.22	/* expand arguments */
106	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
107			;
108			if (rval < 0) {
109			fprintf(stderr, "%s: cannot expand '%s'",
110			argv[0], argv[i]);
111			exit(1);
112			}
113	greg	2.1	if (argv[i][0] == '-')
114			switch (argv[i][1]) {
115			case 'v':
116			switch (argv[i][2]) {
117			case '\0': /* verbose option */
118			verbose = !verbose;
119			continue;
120			case 'f': /* view file */
121			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
122			fprintf(stderr,
123			"%s: not a view file\n", argv[i]);
124			exit(1);
125			}
126			continue;
127			default: /* view option? */
128			rval = getviewopt(&ourview, argc-i, argv+i);
129			if (rval >= 0) {
130			i += rval;
131			continue;
132			}
133			break;
134			}
135			break;
136			case 'p': /* pixel aspect ratio? */
137	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
138			break;
139	gregl	2.35	pixaspect = atof(argv[++i]);
140	greg	2.23	continue;
141	greg	2.31	case 'T': /* time limit (hours) */
142			if (argv[i][2])
143			break;
144			timelim = atof(argv[++i])*3600. + .5;
145			break;
146	greg	2.23	case 'x': /* overall x resolution */
147			if (argv[i][2])
148			break;
149			hres = atoi(argv[++i]);
150			continue;
151			case 'y': /* overall y resolution */
152			if (argv[i][2])
153			break;
154			vres = atoi(argv[++i]);
155			continue;
156	greg	2.1	case 'X': /* horizontal multiplier */
157			if (argv[i][2])
158			break;
159			hmult = atoi(argv[++i]);
160			continue;
161			case 'Y': /* vertical multiplier */
162			if (argv[i][2])
163			break;
164			vmult = atoi(argv[++i]);
165			continue;
166	greg	2.25	case 'R': /* recover */
167			if (argv[i][2])
168			break;
169			rvrlim = 0;
170			/* fall through */
171	greg	2.5	case 'F': /* syncronization file */
172			if (argv[i][2])
173			break;
174	greg	2.28	if ((syncfp =
175			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
176	greg	2.5	fprintf(stderr, "%s: cannot open\n",
177			argv[i]);
178			exit(1);
179			}
180			continue;
181	greg	2.15	case 'z': /* z-file ist verbotten */
182			fprintf(stderr, "%s: -z option not allowed\n",
183			argv[0]);
184			exit(1);
185	greg	2.1	case 'o': /* output file */
186			if (argv[i][2])
187			break;
188			outfile = argv[++i];
189			continue;
190	greg	2.23	} else if (i >= argc-1)
191			break;
192	greg	2.1	rpargv[rpargc++] = argv[i];
193			}
194	greg	2.23	if (i >= argc) {
195			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
196			exit(1);
197			}
198	greg	2.1	if (outfile == NULL) {
199			fprintf(stderr, "%s: missing output file\n", argv[0]);
200			exit(1);
201			}
202			init(argc, argv);
203			rpiece();
204	greg	2.15	exit(cleanup(0));
205	greg	2.1	}
206
207
208	schorsch	2.43	static void
209			dolock( /* lock or unlock a file */
210			int fd,
211			int ltyp
212			)
213	greg	2.25	{
214			static struct flock fls; /* static so initialized to zeroes */
215
216			fls.l_type = ltyp;
217			if (fcntl(fd, F_SETLKW, &fls) < 0) {
218	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
219	greg	2.37	progname, strerror(errno));
220	greg	2.25	exit(1);
221			}
222			}
223
224
225	schorsch	2.43	static void
226			init( /* set up output file and start rpict */
227			int ac,
228			char **av
229			)
230	greg	2.1	{
231	greg	2.23	static char hrbuf[16], vrbuf[16];
232	greg	2.2	extern char VersionID[];
233	greg	2.1	char *err;
234			FILE *fp;
235			int hr, vr;
236	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
237	greg	2.1	/* set up view */
238			if ((err = setview(&ourview)) != NULL) {
239			fprintf(stderr, "%s: %s\n", progname, err);
240			exit(1);
241			}
242	greg	2.25	if (syncfp != NULL) {
243			sflock(F_RDLCK);
244			fscanf(syncfp, "%d %d", &hmult, &vmult);
245			sflock(F_UNLCK);
246	greg	2.5	}
247	greg	2.23	/* compute piece size */
248			hres /= hmult;
249			vres /= vmult;
250	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
251	greg	2.23	sprintf(hrbuf, "%d", hres);
252			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
253			sprintf(vrbuf, "%d", vres);
254			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
255			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
256			rpargv[rpargc++] = av[ac-1];
257			rpargv[rpargc] = NULL;
258	greg	2.1	/* open output file */
259			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
260	greg	2.25	dolock(outfd, F_WRLCK);
261	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
262			goto filerr;
263	greg	2.29	newheader("RADIANCE", fp); /* create header */
264			printargs(ac, av, fp);
265	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
266	greg	2.1	fputs(VIEWSTR, fp);
267			fprintview(&ourview, fp);
268			putc('\n', fp);
269			if (pixaspect < .99 \|\| pixaspect > 1.01)
270			fputaspect(pixaspect, fp);
271			fputformat(COLRFMT, fp);
272			putc('\n', fp);
273			fprtresolu(hreshmult, vresvmult, fp);
274			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
275	greg	2.25	dolock(outfd, F_RDLCK);
276	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
277			goto filerr;
278	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
279	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
280	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
281	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
282			progname, outfile);
283	greg	2.1	exit(1);
284			}
285			} else {
286	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
287			progname, outfile);
288	greg	2.1	exit(1);
289			}
290			scanorig = ftell(fp); /* record position of first scanline */
291			if (fclose(fp) == -1) /* done with stream i/o */
292			goto filerr;
293	greg	2.25	dolock(outfd, F_UNLCK);
294	greg	2.1	/* start rpict process */
295	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
296	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
297	greg	2.1	exit(1);
298			}
299	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
300			(torp = fdopen(rpd.w, "w")) == NULL) {
301	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
302			progname, rpargv[0]);
303			exit(1);
304			}
305	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
306	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
307			exit(1);
308			}
309	greg	2.6	signal(SIGALRM, onalrm);
310	greg	2.31	if (timelim)
311			alarm(timelim);
312	greg	2.1	return;
313			filerr:
314	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
315	greg	2.1	exit(1);
316			}
317
318
319	schorsch	2.43	static int
320			nextpiece( /* get next piece assignment */
321			int *xp,
322			int *yp
323			)
324	greg	2.5	{
325	greg	2.6	if (gotalrm) /* someone wants us to quit */
326			return(0);
327	greg	2.25	if (syncfp != NULL) { /* use sync file */
328			/*
329			* So we don't necessarily have to lock and unlock the file
330			* multiple times (very slow), we establish an exclusive
331			* lock at the beginning on our synchronization file and
332			* maintain it in the subroutine rvrpiece().
333			*/
334			sflock(F_WRLCK);
335			fseek(syncfp, 0L, 0); /* read position */
336			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
337	greg	2.8	*xp = hmult-1;
338			*yp = vmult;
339			}
340	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
341			rvrlim = xpvmult + *yp;
342			if (rvrpiece(xp, yp)) { /* do stragglers first */
343			sflock(F_UNLCK);
344			return(1);
345			}
346	greg	2.8	if (--(yp) < 0) { / decrement position */
347	greg	2.5	*yp = vmult-1;
348	greg	2.25	if (--(xp) < 0) { / all done */
349			sflock(F_UNLCK);
350	greg	2.5	return(0);
351			}
352			}
353	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
354			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
355			fflush(syncfp);
356			sflock(F_UNLCK); /* release sync file */
357	greg	2.5	return(1);
358			}
359	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
360	greg	2.5	}
361
362
363	schorsch	2.43	static int
364			rvrpiece( /* check for recoverable pieces */
365			register int *xp,
366			register int *yp
367			)
368	greg	2.25	{
369			static char pdone = NULL; / which pieces are done */
370			static long readpos = -1; /* how far we've read */
371			register int i;
372			/*
373			* This routine is called by nextpiece() with an
374			* exclusive lock on syncfp and the file pointer at the
375			* appropriate position to read in the finished pieces.
376			*/
377			if (rvrlim < 0)
378			return(0); /* only check if asked */
379			if (pdone == NULL) /* first call */
380			pdone = calloc(hmult*vmult, sizeof(char));
381	greg	2.30	if (pdone == NULL) {
382			fprintf(stderr, "%s: out of memory\n", progname);
383			exit(1);
384			}
385	greg	2.25	if (readpos != -1) /* mark what's been done */
386			fseek(syncfp, readpos, 0);
387			while (fscanf(syncfp, "%d %d", xp, yp) == 2)
388			pdone[xpvmult+*yp] = 1;
389			if (!feof(syncfp)) {
390			fprintf(stderr, "%s: format error in sync file\n", progname);
391			exit(1);
392			}
393			readpos = ftell(syncfp);
394			i = hmultvmult; / find an unaccounted for piece */
395			while (i-- > rvrlim)
396			if (!pdone[i]) {
397			*xp = i / vmult;
398			*yp = i % vmult;
399			pdone[i] = 1; /* consider it done */
400			return(1);
401			}
402			rvrlim = -1; /* nothing left to recover */
403			free(pdone);
404			pdone = NULL;
405			return(0);
406			}
407
408
409	schorsch	2.43	static int
410			cleanup( /* close rpict process and clean up */
411			int rstat
412			)
413	greg	2.1	{
414	greg	2.10	int status;
415	greg	2.1
416	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
417	greg	2.1	fclose(torp);
418			fclose(fromrp);
419	greg	2.10	while (wait(&status) != -1)
420	greg	2.9	if (rstat == 0)
421			rstat = status>>8 & 0xff;
422			return(rstat);
423	greg	2.1	}
424
425
426	schorsch	2.43	static void
427			rpiece(void) /* render picture piece by piece */
428	greg	2.1	{
429			VIEW pview;
430			int xorg, yorg;
431	greg	2.11	/* compute view parameters */
432	schorsch	2.40	pview = ourview;
433	greg	2.11	switch (ourview.type) {
434			case VT_PER:
435			pview.horiz = 2.180./PIatan(
436			tan(PI/180./2.*ourview.horiz)/hmult );
437			pview.vert = 2.180./PIatan(
438			tan(PI/180./2.*ourview.vert)/vmult );
439			break;
440			case VT_PAR:
441			case VT_ANG:
442			pview.horiz = ourview.horiz / hmult;
443			pview.vert = ourview.vert / vmult;
444			break;
445	greg	2.32	case VT_CYL:
446			pview.horiz = ourview.horiz / hmult;
447			pview.vert = 2.180./PIatan(
448			tan(PI/180./2.*ourview.vert)/vmult );
449			break;
450	greg	2.11	case VT_HEM:
451			pview.horiz = 2.180./PIasin(
452			sin(PI/180./2.*ourview.horiz)/hmult );
453			pview.vert = 2.180./PIasin(
454			sin(PI/180./2.*ourview.vert)/vmult );
455			break;
456			default:
457			fprintf(stderr, "%s: unknown view type '-vt%c'\n",
458			progname, ourview.type);
459			exit(cleanup(1));
460			}
461			/* render each piece */
462	greg	2.5	while (nextpiece(&xorg, &yorg)) {
463	gregl	2.33	pview.hoff = ourview.hoffhmult + xorg - 0.5(hmult-1);
464			pview.voff = ourview.voffvmult + yorg - 0.5(vmult-1);
465	greg	2.1	fputs(VIEWSTR, torp);
466			fprintview(&pview, torp);
467			putc('\n', torp);
468	greg	2.11	fflush(torp); /* assigns piece to rpict */
469	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
470			}
471			}
472
473
474	schorsch	2.43	static int
475			putpiece( /* get next piece from rpict */
476			int xpos,
477			int ypos
478			)
479	greg	2.1	{
480	greg	2.7	struct flock fls;
481	greg	2.9	int pid, status;
482	greg	2.1	int hr, vr;
483	greg	2.8	register int y;
484			/* check bounds */
485	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
486	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
487			progname, xpos, ypos);
488	greg	2.10	exit(cleanup(1));
489	greg	2.5	}
490	greg	2.8	/* check header from rpict */
491	greg	2.18	guard_io();
492	greg	2.13	getheader(fromrp, NULL, NULL);
493	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
494	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
495			progname, rpargv[0]);
496	greg	2.10	exit(cleanup(1));
497	greg	2.1	}
498	greg	2.24	if (verbose) { /* notify caller */
499			printf("%d %d begun\n", xpos, ypos);
500			fflush(stdout);
501			}
502	greg	2.18	unguard();
503	greg	2.8	/* load new piece into buffer */
504	greg	2.18	for (y = 0; y < vr; y++) {
505			guard_io();
506	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
507	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
508			progname, rpargv[0]);
509	greg	2.10	exit(cleanup(1));
510	greg	2.1	}
511	greg	2.18	unguard();
512			}
513	greg	2.9	#if MAXFORK
514			/* fork so we don't slow rpict down */
515			if ((pid = fork()) > 0) {
516	greg	2.10	if (++nforked >= MAXFORK) {
517	greg	2.9	wait(&status); /* reap a child */
518			if (status)
519	greg	2.10	exit(cleanup(status>>8 & 0xff));
520	greg	2.9	nforked--;
521			}
522			return(pid);
523			}
524			#else
525			pid = -1; /* no forking */
526			#endif
527	greg	2.19	fls.l_start = scanorig +
528			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
529	greg	2.12	#if NFS
530	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
531	greg	2.8	/* lock file section so NFS doesn't mess up */
532			fls.l_whence = 0;
533			fls.l_type = F_WRLCK;
534	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
535			filerr("lock");
536	greg	2.12	#endif
537	greg	2.8	/* write new piece to file */
538	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
539	greg	2.26	filerr("seek");
540	greg	2.9	if (hmult == 1) {
541			if (writebuf(outfd, (char *)pbuf,
542			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
543	greg	2.26	filerr("write");
544	greg	2.9	} else
545			for (y = 0; y < vr; y++) {
546			if (writebuf(outfd, (char )(pbuf+yhr),
547			hrsizeof(COLR)) != hrsizeof(COLR))
548	greg	2.26	filerr("write");
549	greg	2.9	if (y < vr-1 && lseek(outfd,
550	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
551	greg	2.42	SEEK_CUR) < 0)
552	greg	2.26	filerr("seek");
553	greg	2.1	}
554	greg	2.25	#if NFS
555			fls.l_type = F_UNLCK; /* release lock */
556	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
557			filerr("lock");
558	greg	2.25	#endif
559	greg	2.32	if (verbose) { /* notify caller */
560			printf("%d %d done\n", xpos, ypos);
561			fflush(stdout);
562			}
563	greg	2.25	if (syncfp != NULL) { /* record what's been done */
564			sflock(F_WRLCK);
565			fseek(syncfp, 0L, 2); /* append index */
566			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
567			fflush(syncfp);
568			/*** Unlock not necessary, since
569			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
570	greg	2.20	}
571	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
572	greg	2.9	return(0);
573	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
574	greg	2.26	}
575
576
577	schorsch	2.43	static void
578			filerr( /* report file error and exit */
579			char *t
580			)
581	greg	2.26	{
582			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
583	greg	2.37	progname, t, outfile, strerror(errno));
584	greg	2.9	_exit(1);
585	greg	2.1	}
586	greg	2.16
587			#endif