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/* Copyright (c) 1992 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Generate sections of a picture. |
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*/ |
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|
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#include "standard.h" |
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#include <fcntl.h> |
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#include <signal.h> |
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#include "color.h" |
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#include "view.h" |
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#include "resolu.h" |
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|
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/* set the following to 0 to forgo forking */ |
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#ifndef MAXFORK |
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#define MAXFORK 3 /* allotment of duped processes */ |
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#endif |
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|
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/* rpict command */ |
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char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
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int rpargc = 9; |
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int rpd[3]; |
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FILE *torp, *fromrp; |
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COLR *pbuf; |
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/* our view parameters */ |
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VIEW ourview = STDVIEW; |
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double pixaspect = 1.0; |
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int hres = 512, vres = 512, hmult = 2, vmult = 2; |
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/* output file */ |
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char *outfile = NULL; |
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int outfd; |
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long scanorig; |
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int syncfd = -1; /* lock file descriptor */ |
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int nforked = 0; |
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|
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char *progname; |
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int verbose = 0; |
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|
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extern long lseek(), ftell(); |
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|
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int gotalrm = 0; |
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int onalrm() { gotalrm++; } |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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register int i, rval; |
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|
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progname = argv[0]; |
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for (i = 1; i < argc; i++) { |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'v': |
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switch (argv[i][2]) { |
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case '\0': /* verbose option */ |
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verbose = !verbose; |
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continue; |
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case 'f': /* view file */ |
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if (viewfile(argv[++i], &ourview, NULL) <= 0) { |
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fprintf(stderr, |
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"%s: not a view file\n", argv[i]); |
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exit(1); |
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} |
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continue; |
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default: /* view option? */ |
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rval = getviewopt(&ourview, argc-i, argv+i); |
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if (rval >= 0) { |
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i += rval; |
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continue; |
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} |
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break; |
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} |
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break; |
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case 'p': /* pixel aspect ratio? */ |
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if (argv[i][2] == 'a' && !argv[i][3]) |
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pixaspect = atof(argv[i+1]); |
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break; |
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case 'x': /* piece x resolution */ |
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if (!argv[i][2]) |
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hres = atoi(argv[i+1]); |
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break; |
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case 'y': /* piece y resolution */ |
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if (!argv[i][2]) |
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vres = atoi(argv[i+1]); |
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break; |
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case 'X': /* horizontal multiplier */ |
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if (argv[i][2]) |
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break; |
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hmult = atoi(argv[++i]); |
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continue; |
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case 'Y': /* vertical multiplier */ |
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if (argv[i][2]) |
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break; |
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vmult = atoi(argv[++i]); |
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continue; |
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case 'F': /* syncronization file */ |
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if (argv[i][2]) |
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break; |
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if ((syncfd = open(argv[++i], O_RDWR)) < 0) { |
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fprintf(stderr, "%s: cannot open\n", |
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argv[i]); |
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exit(1); |
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} |
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continue; |
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case 'o': /* output file */ |
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if (argv[i][2]) |
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break; |
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outfile = argv[++i]; |
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continue; |
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} |
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rpargv[rpargc++] = argv[i]; |
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} |
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rpargv[rpargc] = NULL; |
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if (outfile == NULL) { |
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fprintf(stderr, "%s: missing output file\n", argv[0]); |
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exit(1); |
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} |
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init(argc, argv); |
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rpiece(); |
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rval = cleanup(0); |
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exit(rval); |
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} |
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|
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|
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init(ac, av) /* set up output file and start rpict */ |
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int ac; |
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char **av; |
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{ |
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extern char VersionID[]; |
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char *err; |
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FILE *fp; |
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int hr, vr; |
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/* set up view */ |
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if ((err = setview(&ourview)) != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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if (syncfd != -1) { |
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char buf[32]; |
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buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
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sscanf(buf, "%d %d", &hmult, &vmult); |
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} |
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normaspect(viewaspect(&ourview)*hmult/vmult, &pixaspect, &hres, &vres); |
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/* open output file */ |
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if ((outfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0666)) >= 0) { |
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if ((fp = fdopen(dup(outfd), "w")) == NULL) |
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goto filerr; |
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printargs(ac, av, fp); /* write header */ |
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fprintf(fp, "SOFTWARE= %s\n", VersionID); |
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fputs(VIEWSTR, fp); |
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fprintview(&ourview, fp); |
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putc('\n', fp); |
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if (pixaspect < .99 || pixaspect > 1.01) |
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fputaspect(pixaspect, fp); |
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fputformat(COLRFMT, fp); |
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putc('\n', fp); |
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fprtresolu(hres*hmult, vres*vmult, fp); |
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} else if ((outfd = open(outfile, O_RDWR)) >= 0) { |
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if ((fp = fdopen(dup(outfd), "r+")) == NULL) |
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goto filerr; |
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getheader(fp, NULL); /* skip header */ |
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if (fscnresolu(&hr, &vr, fp) < 0 || /* check resolution */ |
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hr != hres*hmult || vr != vres*vmult) { |
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fprintf(stderr, "%s: resolution mismatch on file \"%s\"\n", |
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progname, outfile); |
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exit(1); |
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} |
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} else { |
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fprintf(stderr, "%s: cannot open file \"%s\"\n", |
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progname, outfile); |
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exit(1); |
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} |
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scanorig = ftell(fp); /* record position of first scanline */ |
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if (fclose(fp) == -1) /* done with stream i/o */ |
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goto filerr; |
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sync(); /* flush NFS buffers */ |
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/* start rpict process */ |
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if (open_process(rpd, rpargv) <= 0) { |
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fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
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exit(1); |
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} |
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if ((fromrp = fdopen(rpd[0], "r")) == NULL || |
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(torp = fdopen(rpd[1], "w")) == NULL) { |
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fprintf(stderr, "%s: cannot open stream to %s\n", |
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progname, rpargv[0]); |
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exit(1); |
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} |
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if ((pbuf = (COLR *)malloc(hres*vres*sizeof(COLR))) == NULL) { |
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fprintf(stderr, "%s: out of memory\n", progname); |
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exit(1); |
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} |
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signal(SIGALRM, onalrm); |
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return; |
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filerr: |
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fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile); |
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exit(1); |
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} |
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|
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|
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int |
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nextpiece(xp, yp) /* get next piece assignment */ |
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int *xp, *yp; |
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{ |
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extern char *fgets(); |
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struct flock fls; |
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char buf[64]; |
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|
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if (gotalrm) /* someone wants us to quit */ |
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return(0); |
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if (syncfd != -1) { /* use sync file */ |
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fls.l_type = F_WRLCK; /* gain exclusive access */ |
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fls.l_whence = 0; |
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fls.l_start = 0L; |
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fls.l_len = 0L; |
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fcntl(syncfd, F_SETLKW, &fls); |
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lseek(syncfd, 0L, 0); |
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buf[read(syncfd, buf, sizeof(buf)-1)] = '\0'; |
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if (sscanf(buf, "%*d %*d %d %d", xp, yp) < 2) { |
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*xp = hmult-1; |
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*yp = vmult; |
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} |
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if (--(*yp) < 0) { /* decrement position */ |
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*yp = vmult-1; |
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if (--(*xp) < 0) { /* all done! */ |
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close(syncfd); |
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return(0); |
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} |
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} |
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sprintf(buf, "%d %d\n%d %d\n", hmult, vmult, *xp, *yp); |
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lseek(syncfd, 0L, 0); /* write new position */ |
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write(syncfd, buf, strlen(buf)); |
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fls.l_type = F_UNLCK; /* release sync file */ |
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fcntl(syncfd, F_SETLKW, &fls); |
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return(1); |
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} |
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if (fgets(buf, sizeof(buf), stdin) == NULL) /* use stdin */ |
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return(0); |
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if (sscanf(buf, "%d %d", xp, yp) == 2) |
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return(1); |
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fprintf(stderr, "%s: input format error\n", progname); |
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exit(cleanup(1)); |
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} |
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|
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|
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int |
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cleanup(rstat) /* close rpict process and clean up */ |
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int rstat; |
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{ |
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int status; |
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|
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free((char *)pbuf); |
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fclose(torp); |
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fclose(fromrp); |
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while (wait(&status) != -1) |
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if (rstat == 0) |
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rstat = status>>8 & 0xff; |
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return(rstat); |
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} |
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|
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|
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rpiece() /* render picture piece by piece */ |
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{ |
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VIEW pview; |
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int xorg, yorg; |
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|
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while (nextpiece(&xorg, &yorg)) { |
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copystruct(&pview, &ourview); /* compute view for piece */ |
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switch (ourview.type) { |
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case VT_PER: |
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pview.horiz = 2.*180./PI*atan( |
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tan(PI/180./2.*ourview.horiz)/hmult ); |
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pview.vert = 2.*180./PI*atan( |
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tan(PI/180./2.*ourview.vert)/vmult ); |
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break; |
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case VT_PAR: |
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case VT_ANG: |
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pview.horiz = ourview.horiz / hmult; |
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pview.vert = ourview.vert / vmult; |
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break; |
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case VT_HEM: |
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pview.horiz = 2.*180./PI*asin( |
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sin(PI/180./2.*ourview.horiz)/hmult ); |
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pview.vert = 2.*180./PI*asin( |
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sin(PI/180./2.*ourview.vert)/vmult ); |
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break; |
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default: |
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fprintf(stderr, "%s: unknown view type '-vt%c'\n", |
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progname, ourview.type); |
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exit(cleanup(1)); |
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} |
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pview.hoff += xorg - 0.5*(hmult-1); |
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pview.voff += yorg - 0.5*(vmult-1); |
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fputs(VIEWSTR, torp); |
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fprintview(&pview, torp); |
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putc('\n', torp); |
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fflush(torp); /* assign piece to rpict */ |
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putpiece(xorg, yorg); /* place piece in output */ |
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if (verbose) { /* notify caller */ |
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printf("%d %d done\n", xorg, yorg); |
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fflush(stdout); |
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} |
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} |
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} |
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|
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|
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int |
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putpiece(xpos, ypos) /* get next piece from rpict */ |
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int xpos, ypos; |
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{ |
| 316 |
struct flock fls; |
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int pid, status; |
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int hr, vr; |
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register int y; |
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/* check bounds */ |
| 321 |
if (xpos < 0 | ypos < 0 | xpos >= hmult | ypos >= vmult) { |
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fprintf(stderr, "%s: requested piece (%d,%d) out of range\n", |
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progname, xpos, ypos); |
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exit(cleanup(1)); |
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} |
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/* check header from rpict */ |
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getheader(fromrp, NULL); |
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if (fscnresolu(&hr, &vr, fromrp) < 0 || hr != hres || vr != vres) { |
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fprintf(stderr, "%s: resolution mismatch from %s\n", |
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progname, rpargv[0]); |
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exit(cleanup(1)); |
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} |
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/* load new piece into buffer */ |
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for (y = 0; y < vr; y++) |
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if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
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fprintf(stderr, "%s: read error from %s\n", |
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progname, rpargv[0]); |
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exit(cleanup(1)); |
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} |
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#if MAXFORK |
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/* fork so we don't slow rpict down */ |
| 342 |
if ((pid = fork()) > 0) { |
| 343 |
if (++nforked >= MAXFORK) { |
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wait(&status); /* reap a child */ |
| 345 |
if (status) |
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exit(cleanup(status>>8 & 0xff)); |
| 347 |
nforked--; |
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} |
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return(pid); |
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} |
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#else |
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pid = -1; /* no forking */ |
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#endif |
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/* lock file section so NFS doesn't mess up */ |
| 355 |
fls.l_whence = 0; |
| 356 |
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
| 357 |
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
| 358 |
fls.l_type = F_WRLCK; |
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fcntl(outfd, F_SETLKW, &fls); |
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/* write new piece to file */ |
| 361 |
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
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goto seekerr; |
| 363 |
if (hmult == 1) { |
| 364 |
if (writebuf(outfd, (char *)pbuf, |
| 365 |
vr*hr*sizeof(COLR)) != vr*hr*sizeof(COLR)) |
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goto writerr; |
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} else |
| 368 |
for (y = 0; y < vr; y++) { |
| 369 |
if (writebuf(outfd, (char *)(pbuf+y*hr), |
| 370 |
hr*sizeof(COLR)) != hr*sizeof(COLR)) |
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goto writerr; |
| 372 |
if (y < vr-1 && lseek(outfd, |
| 373 |
(long)(hmult-1)*hr*sizeof(COLR), |
| 374 |
1) == -1) |
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goto seekerr; |
| 376 |
} |
| 377 |
if (pid == -1) { /* fork failed */ |
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fls.l_type = F_UNLCK; /* release lock */ |
| 379 |
fcntl(outfd, F_SETLKW, &fls); |
| 380 |
return(0); |
| 381 |
} |
| 382 |
_exit(0); /* else exit child process (releasing lock) */ |
| 383 |
seekerr: |
| 384 |
fprintf(stderr, "%s: seek error on file \"%s\"\n", progname, outfile); |
| 385 |
_exit(1); |
| 386 |
writerr: |
| 387 |
fprintf(stderr, "%s: write error on file \"%s\"\n", progname, outfile); |
| 388 |
_exit(1); |
| 389 |
} |
