src/util/rpiece.c

#ifndef lint
static const char       RCSid[] = "$Id: rpiece.c,v 2.58 2020/02/28 05:18:49 greg Exp $";
#endif
/*
 * Generate sections of a picture.
 */
 

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

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

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

#ifndef F_SETLKW

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

#else

#ifndef NFS
#define  NFS                    1
#endif

#ifndef RHAS_FORK_EXEC
#undef MAXFORK
#define MAXFORK                 0
#endif
#ifndef MAXFORK
#if NFS
#define  MAXFORK                3       /* allotment of duped processes */
#else
#define  MAXFORK                0
#endif
#endif
                                        /* protection from SYSV signals(!) */
#if defined(sgi)
#define guard_io()      sighold(SIGALRM)
#define unguard()       sigrelse(SIGALRM)
#endif
#ifndef guard_io
#define guard_io()      
#define unguard()       
#endif

extern char  *strerror();

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

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

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

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

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


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


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

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


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


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


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


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

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


static void
rpiece(void)                    /* render picture piece by piece */
{
        char  *err;
        VIEW  pview;
        int  xorg, yorg;
                                        /* render each piece */
        while (nextpiece(&xorg, &yorg)) {
                pview = ourview;
                err = cropview(&pview, (double)xorg/hmult, (double)yorg/vmult,
                                        (xorg+1.)/hmult, (yorg+1.)/vmult);
                if (err != NULL) {
                        fprintf(stderr, "%s: %s\n", progname, err);
                        exit(cleanup(1));
                }
                fputs(VIEWSTR, torp);
                fprintview(&pview, torp);
                fputc('\n', torp);
                fflush(torp);                   /* assigns piece to rpict */
                putpiece(xorg, yorg);           /* place piece in output */
        }
}


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


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

#endif
Revision:	2.59
Committed:	Wed Jan 12 21:07:39 2022 UTC (3 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.58:	+12 -48 lines
Log Message:	refactor: created cropview() function to manage view sections
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.59	static const char RCSid[] = "$Id: rpiece.c,v 2.58 2020/02/28 05:18:49 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Generate sections of a picture.
6			*/
7
8	schorsch	2.43
9			#include <stdio.h>
10			#include <signal.h>
11			#include <sys/types.h>
12	schorsch	2.49
13			#include "platform.h"
14	schorsch	2.45	#ifndef NON_POSIX /* XXX need abstraction for process management */
15			#include <sys/wait.h>
16			#endif
17	schorsch	2.43
18	greg	2.44	#include "standard.h"
19	schorsch	2.43	#include "color.h"
20			#include "view.h"
21			#include "rtprocess.h"
22	greg	2.16
23			#ifndef F_SETLKW
24
25	schorsch	2.43	int
26			main(
27			int argc,
28			char *argv[]
29			)
30	greg	2.16	{
31			fprintf(stderr, "%s: no NFS lock manager on this machine\n", argv[0]);
32			exit(1);
33			}
34
35			#else
36
37	greg	2.12	#ifndef NFS
38			#define NFS 1
39			#endif
40	greg	2.55
41			#ifndef RHAS_FORK_EXEC
42			#undef MAXFORK
43			#define MAXFORK 0
44			#endif
45	greg	2.9	#ifndef MAXFORK
46	greg	2.12	#if NFS
47	greg	2.10	#define MAXFORK 3 /* allotment of duped processes */
48	greg	2.12	#else
49			#define MAXFORK 0
50	greg	2.9	#endif
51	greg	2.12	#endif
52	greg	2.18	/* protection from SYSV signals(!) */
53	greg	2.27	#if defined(sgi)
54	greg	2.18	#define guard_io() sighold(SIGALRM)
55			#define unguard() sigrelse(SIGALRM)
56			#endif
57			#ifndef guard_io
58	schorsch	2.43	#define guard_io()
59			#define unguard()
60	greg	2.18	#endif
61	gregl	2.34
62	greg	2.37	extern char *strerror();
63	gregl	2.34
64	greg	2.1	/* rpict command */
65	greg	2.23	char *rpargv[128] = {"rpict", "-S", "1"};
66			int rpargc = 3;
67	greg	2.1	FILE torp, fromrp;
68	greg	2.8	COLR *pbuf;
69	greg	2.1	/* our view parameters */
70			VIEW ourview = STDVIEW;
71	greg	2.4	double pixaspect = 1.0;
72	greg	2.23	int hres = 1024, vres = 1024, hmult = 4, vmult = 4;
73	greg	2.1	/* output file */
74			char *outfile = NULL;
75			int outfd;
76			long scanorig;
77	greg	2.25	FILE syncfp = NULL; / synchronization file pointer */
78			int synclst = F_UNLCK; /* synchronization file lock status */
79	greg	2.9	int nforked = 0;
80	greg	2.1
81	greg	2.25	#define sflock(t) if ((t)!=synclst) dolock(fileno(syncfp),synclst=t)
82
83	greg	2.1	char *progname;
84			int verbose = 0;
85	greg	2.53	int nowarn = 0;
86	greg	2.31	unsigned timelim = 0;
87	greg	2.25	int rvrlim = -1;
88	greg	2.1
89	greg	2.6	int gotalrm = 0;
90	schorsch	2.38	void onalrm(int i) { gotalrm++; }
91	greg	2.1
92	schorsch	2.43	static void dolock(int fd, int ltyp);
93			static void init(int ac, char **av);
94			static int nextpiece(int xp, int yp);
95			static int rvrpiece(int xp, int yp);
96			static int cleanup(int rstat);
97			static void rpiece(void);
98			static int putpiece(int xpos, int ypos);
99			static void filerr(char *t);
100	greg	2.6
101	schorsch	2.43
102			int
103			main(
104			int argc,
105			char *argv[]
106			)
107	greg	2.1	{
108	greg	2.55	int i, rval;
109	greg	2.1
110			progname = argv[0];
111			for (i = 1; i < argc; i++) {
112	greg	2.22	/* expand arguments */
113	greg	2.37	while ((rval = expandarg(&argc, &argv, i)) > 0)
114			;
115			if (rval < 0) {
116	greg	2.50	fprintf(stderr, "%s: cannot expand '%s'\n",
117	greg	2.37	argv[0], argv[i]);
118			exit(1);
119			}
120	greg	2.1	if (argv[i][0] == '-')
121			switch (argv[i][1]) {
122	greg	2.53	case 'w':
123			if (!argv[i][2])
124			nowarn = !nowarn;
125			else if (argv[i][2] == '+')
126			nowarn = 0;
127			else if (argv[i][2] == '-')
128			nowarn = 1;
129			break;
130	greg	2.1	case 'v':
131			switch (argv[i][2]) {
132			case '\0': /* verbose option */
133			verbose = !verbose;
134			continue;
135			case 'f': /* view file */
136			if (viewfile(argv[++i], &ourview, NULL) <= 0) {
137			fprintf(stderr,
138			"%s: not a view file\n", argv[i]);
139			exit(1);
140			}
141			continue;
142			default: /* view option? */
143			rval = getviewopt(&ourview, argc-i, argv+i);
144			if (rval >= 0) {
145			i += rval;
146			continue;
147			}
148			break;
149			}
150			break;
151			case 'p': /* pixel aspect ratio? */
152	greg	2.51	if (argv[i][2] == 'm') {
153			fprintf(stderr, "%s: -pm unsupported\n",
154			argv[0]);
155			++i;
156			continue;
157			}
158	greg	2.23	if (argv[i][2] != 'a' \|\| argv[i][3])
159			break;
160	gregl	2.35	pixaspect = atof(argv[++i]);
161	greg	2.23	continue;
162	greg	2.31	case 'T': /* time limit (hours) */
163			if (argv[i][2])
164			break;
165			timelim = atof(argv[++i])*3600. + .5;
166	greg	2.51	continue;
167	greg	2.23	case 'x': /* overall x resolution */
168			if (argv[i][2])
169			break;
170			hres = atoi(argv[++i]);
171			continue;
172			case 'y': /* overall y resolution */
173			if (argv[i][2])
174			break;
175			vres = atoi(argv[++i]);
176			continue;
177	greg	2.1	case 'X': /* horizontal multiplier */
178			if (argv[i][2])
179			break;
180			hmult = atoi(argv[++i]);
181			continue;
182			case 'Y': /* vertical multiplier */
183			if (argv[i][2])
184			break;
185			vmult = atoi(argv[++i]);
186			continue;
187	greg	2.25	case 'R': /* recover */
188			if (argv[i][2])
189			break;
190			rvrlim = 0;
191			/* fall through */
192	greg	2.5	case 'F': /* syncronization file */
193			if (argv[i][2])
194			break;
195	greg	2.28	if ((syncfp =
196			fdopen(open(argv[++i],O_RDWR\|O_CREAT,0666),"r+")) == NULL) {
197	greg	2.5	fprintf(stderr, "%s: cannot open\n",
198			argv[i]);
199			exit(1);
200			}
201			continue;
202	greg	2.15	case 'z': /* z-file ist verbotten */
203			fprintf(stderr, "%s: -z option not allowed\n",
204			argv[0]);
205			exit(1);
206	greg	2.1	case 'o': /* output file */
207			if (argv[i][2])
208			break;
209			outfile = argv[++i];
210			continue;
211	greg	2.53	}
212			else if (i >= argc-1)
213			break;
214	greg	2.1	rpargv[rpargc++] = argv[i];
215			}
216	greg	2.23	if (i >= argc) {
217			fprintf(stderr, "%s: missing octree argument\n", argv[0]);
218			exit(1);
219			}
220	greg	2.1	if (outfile == NULL) {
221			fprintf(stderr, "%s: missing output file\n", argv[0]);
222			exit(1);
223			}
224			init(argc, argv);
225			rpiece();
226	greg	2.15	exit(cleanup(0));
227	greg	2.1	}
228
229
230	schorsch	2.43	static void
231			dolock( /* lock or unlock a file */
232			int fd,
233			int ltyp
234			)
235	greg	2.25	{
236			static struct flock fls; /* static so initialized to zeroes */
237
238			fls.l_type = ltyp;
239			if (fcntl(fd, F_SETLKW, &fls) < 0) {
240	greg	2.28	fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
241	greg	2.37	progname, strerror(errno));
242	greg	2.54	_exit(1);
243	greg	2.25	}
244			}
245
246
247	schorsch	2.43	static void
248			init( /* set up output file and start rpict */
249			int ac,
250			char **av
251			)
252	greg	2.1	{
253	greg	2.23	static char hrbuf[16], vrbuf[16];
254	greg	2.2	extern char VersionID[];
255	greg	2.1	char *err;
256			FILE *fp;
257			int hr, vr;
258	schorsch	2.39	SUBPROC rpd; /* since we don't close_process(), this can be local */
259	greg	2.1	/* set up view */
260			if ((err = setview(&ourview)) != NULL) {
261			fprintf(stderr, "%s: %s\n", progname, err);
262			exit(1);
263			}
264	greg	2.25	if (syncfp != NULL) {
265			sflock(F_RDLCK);
266			fscanf(syncfp, "%d %d", &hmult, &vmult);
267			sflock(F_UNLCK);
268	greg	2.5	}
269	greg	2.23	/* compute piece size */
270	greg	2.53	hr = hres; vr = vres;
271			if (pixaspect > FTINY)
272			normaspect(viewaspect(&ourview), &pixaspect, &hr, &vr);
273	greg	2.23	hres /= hmult;
274			vres /= vmult;
275	greg	2.46	if (hres <= 0 \|\| vres <= 0) {
276	greg	2.47	fprintf(stderr, "%s: illegal resolution/subdivision\n", progname);
277	greg	2.46	exit(1);
278			}
279	greg	2.1	normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres);
280	greg	2.53	if (!nowarn && (hr != hreshmult) \| (vr != vresvmult))
281			fprintf(stderr,
282	greg	2.57	"%s: warning - changed resolution from %dx%d to %dx%d\n",
283	greg	2.53	progname, hr, vr, hreshmult, vresvmult);
284	greg	2.23	sprintf(hrbuf, "%d", hres);
285			rpargv[rpargc++] = "-x"; rpargv[rpargc++] = hrbuf;
286			sprintf(vrbuf, "%d", vres);
287			rpargv[rpargc++] = "-y"; rpargv[rpargc++] = vrbuf;
288			rpargv[rpargc++] = "-pa"; rpargv[rpargc++] = "0";
289			rpargv[rpargc++] = av[ac-1];
290			rpargv[rpargc] = NULL;
291	greg	2.1	/* open output file */
292			if ((outfd = open(outfile, O_WRONLY\|O_CREAT\|O_EXCL, 0666)) >= 0) {
293	greg	2.25	dolock(outfd, F_WRLCK);
294	greg	2.1	if ((fp = fdopen(dup(outfd), "w")) == NULL)
295			goto filerr;
296	greg	2.29	newheader("RADIANCE", fp); /* create header */
297			printargs(ac, av, fp);
298	greg	2.2	fprintf(fp, "SOFTWARE= %s\n", VersionID);
299	greg	2.1	fputs(VIEWSTR, fp);
300			fprintview(&ourview, fp);
301	greg	2.59	fputc('\n', fp);
302	greg	2.52	fputnow(fp);
303	greg	2.1	if (pixaspect < .99 \|\| pixaspect > 1.01)
304			fputaspect(pixaspect, fp);
305			fputformat(COLRFMT, fp);
306	greg	2.59	fputc('\n', fp);
307	greg	2.1	fprtresolu(hreshmult, vresvmult, fp);
308			} else if ((outfd = open(outfile, O_RDWR)) >= 0) {
309	greg	2.25	dolock(outfd, F_RDLCK);
310	greg	2.1	if ((fp = fdopen(dup(outfd), "r+")) == NULL)
311			goto filerr;
312	greg	2.13	getheader(fp, NULL, NULL); /* skip header */
313	greg	2.15	if (!fscnresolu(&hr, &vr, fp) \|\| /* check resolution */
314	greg	2.1	hr != hreshmult \|\| vr != vresvmult) {
315	greg	2.8	fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n",
316			progname, outfile);
317	greg	2.1	exit(1);
318			}
319			} else {
320	greg	2.8	fprintf(stderr, "%s: cannot open file \"%s\"\n",
321			progname, outfile);
322	greg	2.1	exit(1);
323			}
324			scanorig = ftell(fp); /* record position of first scanline */
325			if (fclose(fp) == -1) /* done with stream i/o */
326			goto filerr;
327	greg	2.25	dolock(outfd, F_UNLCK);
328	greg	2.1	/* start rpict process */
329	greg	2.58	rpd = sp_inactive;
330	schorsch	2.39	if (open_process(&rpd, rpargv) <= 0) {
331	greg	2.3	fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]);
332	greg	2.1	exit(1);
333			}
334	schorsch	2.39	if ((fromrp = fdopen(rpd.r, "r")) == NULL \|\|
335			(torp = fdopen(rpd.w, "w")) == NULL) {
336	greg	2.1	fprintf(stderr, "%s: cannot open stream to %s\n",
337			progname, rpargv[0]);
338			exit(1);
339			}
340	greg	2.23	if ((pbuf = (COLR )bmalloc(hresvres*sizeof(COLR))) == NULL) {
341	greg	2.1	fprintf(stderr, "%s: out of memory\n", progname);
342			exit(1);
343			}
344	greg	2.6	signal(SIGALRM, onalrm);
345	greg	2.31	if (timelim)
346			alarm(timelim);
347	greg	2.1	return;
348			filerr:
349	greg	2.8	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
350	greg	2.1	exit(1);
351			}
352
353
354	schorsch	2.43	static int
355			nextpiece( /* get next piece assignment */
356			int *xp,
357			int *yp
358			)
359	greg	2.5	{
360	greg	2.6	if (gotalrm) /* someone wants us to quit */
361			return(0);
362	greg	2.25	if (syncfp != NULL) { /* use sync file */
363			/*
364			* So we don't necessarily have to lock and unlock the file
365			* multiple times (very slow), we establish an exclusive
366			* lock at the beginning on our synchronization file and
367			* maintain it in the subroutine rvrpiece().
368			*/
369			sflock(F_WRLCK);
370			fseek(syncfp, 0L, 0); /* read position */
371			if (fscanf(syncfp, "%d %d %d %d", xp, yp) < 2) {
372	greg	2.8	*xp = hmult-1;
373			*yp = vmult;
374			}
375	greg	2.25	if (rvrlim == 0) /* initialize recovery limit */
376			rvrlim = xpvmult + *yp;
377			if (rvrpiece(xp, yp)) { /* do stragglers first */
378			sflock(F_UNLCK);
379			return(1);
380			}
381	greg	2.8	if (--(yp) < 0) { / decrement position */
382	greg	2.5	*yp = vmult-1;
383	greg	2.25	if (--(xp) < 0) { / all done */
384			sflock(F_UNLCK);
385	greg	2.5	return(0);
386			}
387			}
388	greg	2.25	fseek(syncfp, 0L, 0); /* write new position */
389			fprintf(syncfp, "%4d %4d\n%4d %4d\n\n", hmult, vmult, xp, yp);
390			fflush(syncfp);
391			sflock(F_UNLCK); /* release sync file */
392	greg	2.5	return(1);
393			}
394	greg	2.26	return(scanf("%d %d", xp, yp) == 2); /* use stdin */
395	greg	2.5	}
396
397
398	schorsch	2.43	static int
399			rvrpiece( /* check for recoverable pieces */
400	greg	2.55	int *xp,
401			int *yp
402	schorsch	2.43	)
403	greg	2.25	{
404			static char pdone = NULL; / which pieces are done */
405			static long readpos = -1; /* how far we've read */
406	greg	2.56	int px, py, i;
407	greg	2.25	/*
408			* This routine is called by nextpiece() with an
409			* exclusive lock on syncfp and the file pointer at the
410			* appropriate position to read in the finished pieces.
411			*/
412			if (rvrlim < 0)
413			return(0); /* only check if asked */
414			if (pdone == NULL) /* first call */
415	greg	2.56	pdone = (char )calloc(hmultvmult, sizeof(char));
416	greg	2.30	if (pdone == NULL) {
417			fprintf(stderr, "%s: out of memory\n", progname);
418			exit(1);
419			}
420	greg	2.25	if (readpos != -1) /* mark what's been done */
421			fseek(syncfp, readpos, 0);
422	greg	2.56	while (fscanf(syncfp, "%d %d", &px, &py) == 2)
423			pdone[px*vmult+py] = 1;
424	greg	2.25	if (!feof(syncfp)) {
425			fprintf(stderr, "%s: format error in sync file\n", progname);
426			exit(1);
427			}
428			readpos = ftell(syncfp);
429			i = hmultvmult; / find an unaccounted for piece */
430			while (i-- > rvrlim)
431			if (!pdone[i]) {
432			*xp = i / vmult;
433			*yp = i % vmult;
434			pdone[i] = 1; /* consider it done */
435			return(1);
436			}
437			rvrlim = -1; /* nothing left to recover */
438			free(pdone);
439			pdone = NULL;
440			return(0);
441			}
442
443
444	schorsch	2.43	static int
445			cleanup( /* close rpict process and clean up */
446			int rstat
447			)
448	greg	2.1	{
449	greg	2.10	int status;
450	greg	2.1
451	greg	2.23	bfree((char )pbuf, hresvres*sizeof(COLR));
452	greg	2.1	fclose(torp);
453			fclose(fromrp);
454	greg	2.10	while (wait(&status) != -1)
455	greg	2.9	if (rstat == 0)
456			rstat = status>>8 & 0xff;
457			return(rstat);
458	greg	2.1	}
459
460
461	schorsch	2.43	static void
462			rpiece(void) /* render picture piece by piece */
463	greg	2.1	{
464	greg	2.59	char *err;
465	greg	2.1	VIEW pview;
466			int xorg, yorg;
467	greg	2.11	/* render each piece */
468	greg	2.5	while (nextpiece(&xorg, &yorg)) {
469	greg	2.59	pview = ourview;
470			err = cropview(&pview, (double)xorg/hmult, (double)yorg/vmult,
471			(xorg+1.)/hmult, (yorg+1.)/vmult);
472			if (err != NULL) {
473			fprintf(stderr, "%s: %s\n", progname, err);
474			exit(cleanup(1));
475			}
476	greg	2.1	fputs(VIEWSTR, torp);
477			fprintview(&pview, torp);
478	greg	2.59	fputc('\n', torp);
479	greg	2.11	fflush(torp); /* assigns piece to rpict */
480	greg	2.1	putpiece(xorg, yorg); /* place piece in output */
481			}
482			}
483
484
485	schorsch	2.43	static int
486			putpiece( /* get next piece from rpict */
487			int xpos,
488			int ypos
489			)
490	greg	2.1	{
491	greg	2.7	struct flock fls;
492	greg	2.9	int pid, status;
493	greg	2.1	int hr, vr;
494	greg	2.55	int y;
495	greg	2.8	/* check bounds */
496	schorsch	2.41	if ((xpos < 0) \| (ypos < 0) \| (xpos >= hmult) \| (ypos >= vmult)) {
497	greg	2.5	fprintf(stderr, "%s: requested piece (%d,%d) out of range\n",
498			progname, xpos, ypos);
499	greg	2.10	exit(cleanup(1));
500	greg	2.5	}
501	greg	2.8	/* check header from rpict */
502	greg	2.18	guard_io();
503	greg	2.13	getheader(fromrp, NULL, NULL);
504	schorsch	2.41	if (!fscnresolu(&hr, &vr, fromrp) \|\| (hr != hres) \| (vr != vres)) {
505	greg	2.3	fprintf(stderr, "%s: resolution mismatch from %s\n",
506			progname, rpargv[0]);
507	greg	2.10	exit(cleanup(1));
508	greg	2.1	}
509	greg	2.24	if (verbose) { /* notify caller */
510			printf("%d %d begun\n", xpos, ypos);
511			fflush(stdout);
512			}
513	greg	2.18	unguard();
514	greg	2.8	/* load new piece into buffer */
515	greg	2.18	for (y = 0; y < vr; y++) {
516			guard_io();
517	greg	2.8	if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) {
518	greg	2.3	fprintf(stderr, "%s: read error from %s\n",
519			progname, rpargv[0]);
520	greg	2.10	exit(cleanup(1));
521	greg	2.1	}
522	greg	2.18	unguard();
523			}
524	greg	2.9	#if MAXFORK
525			/* fork so we don't slow rpict down */
526			if ((pid = fork()) > 0) {
527	greg	2.10	if (++nforked >= MAXFORK) {
528	greg	2.9	wait(&status); /* reap a child */
529			if (status)
530	greg	2.10	exit(cleanup(status>>8 & 0xff));
531	greg	2.9	nforked--;
532			}
533			return(pid);
534			}
535			#else
536			pid = -1; /* no forking */
537			#endif
538	greg	2.19	fls.l_start = scanorig +
539			((long)(vmult-1-ypos)vreshmult+xpos)hressizeof(COLR);
540	greg	2.12	#if NFS
541	greg	2.19	fls.l_len = ((long)(vres-1)hmult+1)hres*sizeof(COLR);
542	greg	2.8	/* lock file section so NFS doesn't mess up */
543			fls.l_whence = 0;
544			fls.l_type = F_WRLCK;
545	greg	2.54	#if 0
546	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
547			filerr("lock");
548	greg	2.54	#else
549			dolock(outfd, F_WRLCK);
550			#endif
551	greg	2.12	#endif
552	greg	2.8	/* write new piece to file */
553	greg	2.42	if (lseek(outfd, (off_t)fls.l_start, SEEK_SET) < 0)
554	greg	2.26	filerr("seek");
555	greg	2.9	if (hmult == 1) {
556			if (writebuf(outfd, (char *)pbuf,
557			vrhrsizeof(COLR)) != vrhrsizeof(COLR))
558	greg	2.26	filerr("write");
559	greg	2.9	} else
560			for (y = 0; y < vr; y++) {
561			if (writebuf(outfd, (char )(pbuf+yhr),
562			hrsizeof(COLR)) != hrsizeof(COLR))
563	greg	2.26	filerr("write");
564	greg	2.9	if (y < vr-1 && lseek(outfd,
565	greg	2.37	(off_t)(hmult-1)hrsizeof(COLR),
566	greg	2.42	SEEK_CUR) < 0)
567	greg	2.26	filerr("seek");
568	greg	2.1	}
569	greg	2.25	#if NFS
570			fls.l_type = F_UNLCK; /* release lock */
571	greg	2.54	#if 0
572	greg	2.26	if (fcntl(outfd, F_SETLKW, &fls) < 0)
573			filerr("lock");
574	greg	2.54	#else
575			dolock(outfd, F_UNLCK);
576			#endif
577	greg	2.25	#endif
578	greg	2.32	if (verbose) { /* notify caller */
579			printf("%d %d done\n", xpos, ypos);
580			fflush(stdout);
581			}
582	greg	2.25	if (syncfp != NULL) { /* record what's been done */
583			sflock(F_WRLCK);
584			fseek(syncfp, 0L, 2); /* append index */
585			fprintf(syncfp, "%4d %4d\n", xpos, ypos);
586			fflush(syncfp);
587			/*** Unlock not necessary, since
588			sflock(F_UNLCK); _exit() or nextpiece() is next ***/
589	greg	2.20	}
590	greg	2.25	if (pid == -1) /* didn't fork or fork failed */
591	greg	2.9	return(0);
592	greg	2.25	_exit(0); /* else exit child process (releasing locks) */
593	greg	2.26	}
594
595
596	schorsch	2.43	static void
597			filerr( /* report file error and exit */
598			char *t
599			)
600	greg	2.26	{
601			fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
602	greg	2.37	progname, t, outfile, strerror(errno));
603	greg	2.9	_exit(1);
604	greg	2.1	}
605	greg	2.16
606			#endif