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#ifndef lint |
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static const char RCSid[] = "$Id: rhpict.c,v 3.23 2025/06/06 19:11:21 greg Exp $"; |
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#endif |
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/* |
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* Radiance holodeck picture generator |
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*/ |
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|
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#include <string.h> |
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#include "platform.h" |
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#include "rterror.h" |
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#include "rholo.h" |
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|
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char *hdkfile; /* holodeck file name */ |
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char gargc; /* global argc */ |
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char **gargv; /* global argv */ |
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|
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VIEW myview = STDVIEW; /* current output view */ |
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int xres = 512, yres = 512; /* max. horizontal and vertical resolution */ |
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char *outspec = NULL; /* output file specification */ |
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double randfrac = -1.; /* random resampling fraction */ |
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double pixaspect = 1.; /* pixel aspect ratio */ |
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int seqstart = 0; /* sequence start frame */ |
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double expval = 1.; /* exposure value */ |
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|
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COLOR *mypixel; /* pixels being rendered */ |
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float *myweight; /* weights (used to compute final pixels) */ |
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float *mydepth; /* depth values (visibility culling) */ |
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int hres, vres; /* current horizontal and vertical res. */ |
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|
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extern int nowarn; /* turn warnings off? */ |
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|
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static void dopicture(int fn); |
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static void render_frame(PACKHEAD *bl, int nb); |
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static void startpicture(int fn); |
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static int endpicture(void); |
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static void initialize(void); |
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/* from rhpict2.c */ |
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extern void pixFinish(double ransamp); |
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extern void pixBeam(BEAM *bp, HDBEAMI *hb); |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int i, rval; |
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|
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gargc = argc; gargv = argv; |
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fixargv0(argv[0]); /* get arguments */ |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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rval = getviewopt(&myview, argc-i, argv+i); |
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if (rval >= 0) { /* view option */ |
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i += rval; |
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continue; |
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} |
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switch (argv[i][1]) { |
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case 'w': /* turn off warnings */ |
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nowarn++; |
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break; |
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case 'p': /* pixel aspect/exposure */ |
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if (badarg(argc-i-1,argv+i+1,"f")) |
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goto userr; |
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if (argv[i][2] == 'a') |
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pixaspect = atof(argv[++i]); |
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else if (argv[i][2] == 'e') { |
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expval = atof(argv[++i]); |
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if ((argv[i][0] == '-') | (argv[i][0] == '+')) |
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expval = pow(2., expval); |
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} else |
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goto userr; |
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break; |
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case 'x': /* horizontal resolution */ |
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if (badarg(argc-i-1,argv+i+1,"i")) |
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goto userr; |
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xres = atoi(argv[++i]); |
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break; |
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case 'y': /* vertical resolution */ |
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if (badarg(argc-i-1,argv+i+1,"i")) |
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goto userr; |
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yres = atoi(argv[++i]); |
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break; |
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case 'o': /* output file specificaiton */ |
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if (badarg(argc-i-1,argv+i+1,"s")) |
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goto userr; |
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outspec = argv[++i]; |
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break; |
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case 'r': /* random sampling */ |
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if (badarg(argc-i-1,argv+i+1,"f")) |
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goto userr; |
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randfrac = atof(argv[++i]); |
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break; |
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case 's': /* smooth sampling */ |
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randfrac = -1.; |
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break; |
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case 'S': /* sequence start */ |
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if (badarg(argc-i-1,argv+i+1,"i")) |
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goto userr; |
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seqstart = atoi(argv[++i]); |
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break; |
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case 'v': /* view file */ |
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if (argv[i][2]!='f' || badarg(argc-i-1,argv+i+1,"s")) |
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goto userr; |
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rval = viewfile(argv[++i], &myview, NULL); |
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if (rval < 0) { |
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sprintf(errmsg, "cannot open view file \"%s\"", |
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argv[i]); |
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error(SYSTEM, errmsg); |
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} else if (rval == 0) { |
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sprintf(errmsg, "bad view file \"%s\"", |
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argv[i]); |
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error(USER, errmsg); |
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} |
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break; |
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default: |
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goto userr; |
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} |
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} |
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/* open holodeck file */ |
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if (i != argc-1) |
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goto userr; |
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hdkfile = argv[i]; |
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initialize(); |
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/* render picture(s) */ |
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if (seqstart <= 0) |
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dopicture(0); |
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else |
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while (nextview(&myview, stdin) != EOF) |
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dopicture(seqstart++); |
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quit(0); /* all done! */ |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-w][-r rf][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n", |
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progname); |
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quit(1); |
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return 1; /* pro forma return */ |
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} |
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|
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|
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static void |
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dopicture( /* render view from holodeck */ |
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int fn |
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) |
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{ |
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char *err; |
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int rval; |
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BEAMLIST blist; |
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|
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if ((err = setview(&myview)) != NULL) { |
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sprintf(errmsg, "%s -- skipping frame %d", err, fn); |
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error(WARNING, errmsg); |
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return; |
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} |
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startpicture(fn); /* open output picture */ |
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/* determine relevant beams */ |
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viewbeams(&myview, hres, vres, &blist); |
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/* render image */ |
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if (blist.nb > 0) { |
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render_frame(blist.bl, blist.nb); |
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free((void *)blist.bl); |
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} else { |
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sprintf(errmsg, "no section visible in frame %d", fn); |
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error(WARNING, errmsg); |
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} |
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rval = endpicture(); /* write pixel values */ |
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if (rval < 0) { |
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sprintf(errmsg, "error writing frame %d", fn); |
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error(SYSTEM, errmsg); |
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} |
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#ifdef DEBUG |
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if (blist.nb > 0 & rval > 0) { |
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sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)", |
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rval, fn, 100.*rval/(hres*vres)); |
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error(WARNING, errmsg); |
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} |
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#endif |
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} |
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|
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|
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static void |
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render_frame( /* render frame from beam values */ |
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PACKHEAD *bl, |
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int nb |
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) |
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{ |
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HDBEAMI *bil; |
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int i; |
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|
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if (nb <= 0) return; |
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if ((bil = (HDBEAMI *)malloc(nb*sizeof(HDBEAMI))) == NULL) |
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error(SYSTEM, "out of memory in render_frame"); |
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for (i = nb; i--; ) { |
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bil[i].h = hdlist[bl[i].hd]; |
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bil[i].b = bl[i].bi; |
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} |
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hdloadbeams(bil, nb, pixBeam); |
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pixFinish(randfrac); |
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free((void *)bil); |
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} |
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|
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|
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static void |
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startpicture( /* initialize picture for rendering & output */ |
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int fn |
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) |
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{ |
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extern char VersionID[]; |
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double pa = pixaspect; |
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char fname[256]; |
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/* compute picture resolution */ |
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hres = xres; vres = yres; |
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normaspect(viewaspect(&myview), &pa, &hres, &vres); |
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/* prepare output */ |
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if (outspec != NULL) { |
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sprintf(fname, outspec, fn); |
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if (freopen(fname, "wb", stdout) == NULL) { |
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sprintf(errmsg, "cannot open output \"%s\"", fname); |
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error(SYSTEM, errmsg); |
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} |
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} |
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/* write header */ |
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newheader("RADIANCE", stdout); |
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printf("SOFTWARE= %s\n", VersionID); |
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printargs(gargc, gargv, stdout); |
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if (fn) |
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printf("FRAME=%d\n", fn); |
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fputs(VIEWSTR, stdout); |
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fprintview(&myview, stdout); |
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fputc('\n', stdout); |
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if ((pa < 0.99) | (pa > 1.01)) |
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fputaspect(pa, stdout); |
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if ((expval < 0.99) | (expval > 1.01)) |
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fputexpos(expval, stdout); |
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fputformat(COLRFMT, stdout); |
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fputc('\n', stdout); |
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/* write resolution (standard order) */ |
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fprtresolu(hres, vres, stdout); |
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/* prepare image buffers */ |
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memset((char *)mypixel, '\0', hres*vres*sizeof(COLOR)); |
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memset((char *)myweight, '\0', hres*vres*sizeof(float)); |
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memset((char *)mydepth, '\0', hres*vres*sizeof(float)); |
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} |
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|
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|
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static int |
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endpicture(void) /* finish and write out pixels */ |
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{ |
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int lastr = -1, nunrend = 0; |
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int32 lastp, lastrp; |
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int32 p; |
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double d; |
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/* compute final pixel values */ |
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for (p = hres*vres; p--; ) { |
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if (myweight[p] <= FTINY) { |
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if (lastr >= 0) { |
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if (p/hres == lastp/hres) |
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copycolor(mypixel[p], mypixel[lastp]); |
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else |
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copycolor(mypixel[p], mypixel[lastrp]); |
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} |
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nunrend++; |
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continue; |
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} |
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d = expval/myweight[p]; |
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scalecolor(mypixel[p], d); |
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if ((lastp=p)/hres != lastr) |
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lastr = (lastrp=p)/hres; |
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} |
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/* write each scanline */ |
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for (p = vres; p--; ) |
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if (fwritescan(mypixel+p*hres, hres, stdout) < 0) |
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return(-1); |
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if (fflush(stdout) == EOF) |
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return(-1); |
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return(nunrend); |
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} |
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|
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|
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static void |
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initialize(void) /* initialize holodeck and buffers */ |
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{ |
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int fd; |
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FILE *fp; |
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int n; |
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off_t nextloc; |
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/* open holodeck file */ |
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if ((fp = fopen(hdkfile, "rb")) == NULL) { |
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sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile); |
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error(SYSTEM, errmsg); |
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} |
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/* check header format */ |
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checkheader(fp, HOLOFMT, NULL); |
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/* check magic number */ |
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if (getw(fp) != HOLOMAGIC) { |
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sprintf(errmsg, "bad magic number in holodeck file \"%s\"", |
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hdkfile); |
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error(USER, errmsg); |
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} |
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nextloc = ftell(fp); /* get stdio position */ |
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fd = dup(fileno(fp)); /* dup file descriptor */ |
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fclose(fp); /* done with stdio */ |
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for (n = 0; nextloc > 0L; n++) { /* initialize each section */ |
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lseek(fd, nextloc, SEEK_SET); |
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read(fd, (char *)&nextloc, sizeof(nextloc)); |
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hdinit(fd, NULL); |
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} |
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/* allocate picture buffer */ |
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mypixel = (COLOR *)bmalloc(xres*yres*sizeof(COLOR)); |
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myweight = (float *)bmalloc(xres*yres*sizeof(float)); |
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mydepth = (float *)bmalloc(xres*yres*sizeof(float)); |
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if ((mypixel == NULL) | (myweight == NULL) | (mydepth == NULL)) |
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error(SYSTEM, "out of memory in initialize"); |
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} |
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|
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|
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void |
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eputs(const char *s) /* put error message to stderr */ |
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{ |
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static int midline = 0; |
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|
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if (!*s) |
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return; |
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if (!midline++) { /* prepend line with program name */ |
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fputs(progname, stderr); |
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fputs(": ", stderr); |
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} |
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fputs(s, stderr); |
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if (s[strlen(s)-1] == '\n') { |
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fflush(stderr); |
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midline = 0; |
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} |
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} |
