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#ifndef lint
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static const char RCSid[] = "$Id: dctimestep.c,v 2.36 2015/07/14 16:08:28 greg Exp $";
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#endif
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/*
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* Compute time-step result using Daylight Coefficient method.
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*
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* G. Ward
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*/
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#include <ctype.h>
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#include "platform.h"
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#include "standard.h"
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#include "cmatrix.h"
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#include "platform.h"
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#include "resolu.h"
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char *progname; /* global argv[0] */
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/* Sum together a set of images and write result to fout */
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static int
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sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
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{
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int myDT = DTfromHeader;
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COLOR *scanline = NULL;
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CMATRIX *pmat = NULL;
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int myXR=0, myYR=0;
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int i, y;
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if (cv->ncols != 1)
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error(INTERNAL, "expected vector in sum_images()");
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for (i = 0; i < cv->nrows; i++) {
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const COLORV *scv = cv_lval(cv,i);
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char fname[1024];
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FILE *fp;
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int dt, xr, yr;
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COLORV *psp;
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char *err;
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/* check for zero */
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if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
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(myDT != DTfromHeader) | (i < cv->nrows-1))
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continue;
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/* open next picture */
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sprintf(fname, fspec, i);
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if ((fp = fopen(fname, "rb")) == NULL) {
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sprintf(errmsg, "cannot open picture '%s'", fname);
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error(SYSTEM, errmsg);
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}
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dt = DTfromHeader;
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if ((err = cm_getheader(&dt, NULL, NULL, fp)) != NULL)
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error(USER, err);
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if ((dt != DTrgbe) & (dt != DTxyze) ||
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!fscnresolu(&xr, &yr, fp)) {
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sprintf(errmsg, "file '%s' not a picture", fname);
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error(USER, errmsg);
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}
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if (myDT == DTfromHeader) { /* on first one */
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myDT = dt;
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myXR = xr; myYR = yr;
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scanline = (COLOR *)malloc(sizeof(COLOR)*myXR);
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if (scanline == NULL)
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error(SYSTEM, "out of memory in sum_images()");
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pmat = cm_alloc(myYR, myXR);
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memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
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/* finish header */
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fputformat((char *)cm_fmt_id[myDT], fout);
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fputc('\n', fout);
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fflush(fout);
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} else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
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sprintf(errmsg, "picture '%s' format/size mismatch",
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fname);
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error(USER, errmsg);
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}
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psp = pmat->cmem;
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for (y = 0; y < yr; y++) { /* read it in */
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int x;
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if (freadscan(scanline, xr, fp) < 0) {
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sprintf(errmsg, "error reading picture '%s'",
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fname);
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error(SYSTEM, errmsg);
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}
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/* sum in scanline */
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for (x = 0; x < xr; x++, psp += 3) {
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multcolor(scanline[x], scv);
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addcolor(psp, scanline[x]);
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}
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}
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fclose(fp); /* done this picture */
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}
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free(scanline);
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i = cm_write(pmat, myDT, fout); /* write picture */
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cm_free(pmat); /* free data */
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return(i);
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}
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/* check to see if a string contains a %d or %o specification */
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static int
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hasNumberFormat(const char *s)
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{
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if (s == NULL)
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return(0);
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while (*s) {
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while (*s != '%')
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if (!*s++)
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return(0);
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if (*++s == '%') { /* ignore "%%" */
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++s;
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continue;
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}
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while (isdigit(*s)) /* field length */
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++s;
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/* field we'll use? */
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if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
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(*s == 'x') | (*s == 'X'))
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return(1);
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}
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return(0); /* didn't find one */
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}
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int
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main(int argc, char *argv[])
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{
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int skyfmt = DTfromHeader;
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int outfmt = DTascii;
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int headout = 1;
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int nsteps = 0;
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char *ofspec = NULL;
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FILE *ofp = stdout;
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CMATRIX *cmtx; /* component vector/matrix result */
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char fnbuf[256];
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int a, i;
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progname = argv[0];
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/* get options */
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for (a = 1; a < argc && argv[a][0] == '-'; a++)
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switch (argv[a][1]) {
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case 'n':
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nsteps = atoi(argv[++a]);
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if (nsteps < 0)
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goto userr;
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skyfmt = nsteps ? DTascii : DTfromHeader;
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break;
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case 'h':
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headout = !headout;
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break;
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case 'i':
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switch (argv[a][2]) {
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case 'f':
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skyfmt = DTfloat;
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break;
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case 'd':
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skyfmt = DTdouble;
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break;
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case 'a':
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skyfmt = DTascii;
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break;
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default:
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goto userr;
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}
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break;
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case 'o':
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switch (argv[a][2]) {
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case '\0': /* output specification (not format) */
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ofspec = argv[++a];
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break;
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case 'f':
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outfmt = DTfloat;
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break;
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case 'd':
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outfmt = DTdouble;
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break;
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case 'a':
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outfmt = DTascii;
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break;
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default:
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goto userr;
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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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if ((argc-a < 1) | (argc-a > 4))
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goto userr;
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if (argc-a > 2) { /* VTDs expression */
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CMATRIX *smtx, *Dmat, *Tmat, *imtx;
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const char *ccp;
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/* get sky vector/matrix */
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smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
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nsteps = smtx->ncols;
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/* load BSDF */
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if (argv[a+1][0] != '!' &&
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(ccp = strrchr(argv[a+1], '.')) != NULL &&
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!strcasecmp(ccp+1, "XML"))
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Tmat = cm_loadBTDF(argv[a+1]);
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else
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Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
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/* load Daylight matrix */
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Dmat = cm_load(argv[a+2], Tmat->ncols,
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smtx->nrows, DTfromHeader);
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/* multiply vector through */
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imtx = cm_multiply(Dmat, smtx);
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cm_free(Dmat); cm_free(smtx);
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cmtx = cm_multiply(Tmat, imtx);
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cm_free(Tmat);
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cm_free(imtx);
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} else { /* sky vector/matrix only */
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cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
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nsteps = cmtx->ncols;
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}
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/* prepare output stream */
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if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
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sprintf(fnbuf, ofspec, 1);
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ofspec = fnbuf;
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}
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if (ofspec != NULL && !hasNumberFormat(ofspec)) {
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if ((ofp = fopen(ofspec, "w")) == NULL) {
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fprintf(stderr, "%s: cannot open '%s' for output\n",
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progname, ofspec);
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return(1);
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}
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ofspec = NULL; /* only need to open once */
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}
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if (hasNumberFormat(argv[a])) { /* generating image(s) */
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if (ofspec == NULL) {
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SET_FILE_BINARY(ofp);
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newheader("RADIANCE", ofp);
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printargs(argc, argv, ofp);
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fputnow(ofp);
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}
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if (nsteps > 1) /* multiple output frames? */
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for (i = 0; i < nsteps; i++) {
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CMATRIX *cvec = cm_column(cmtx, i);
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if (ofspec != NULL) {
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sprintf(fnbuf, ofspec, i+1);
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if ((ofp = fopen(fnbuf, "wb")) == NULL) {
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fprintf(stderr,
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"%s: cannot open '%s' for output\n",
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progname, fnbuf);
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return(1);
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}
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newheader("RADIANCE", ofp);
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printargs(argc, argv, ofp);
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fputnow(ofp);
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}
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fprintf(ofp, "FRAME=%d\n", i+1);
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if (!sum_images(argv[a], cvec, ofp))
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return(1);
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if (ofspec != NULL) {
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if (fclose(ofp) == EOF) {
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fprintf(stderr,
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"%s: error writing to '%s'\n",
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progname, fnbuf);
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return(1);
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}
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ofp = stdout;
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}
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cm_free(cvec);
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}
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else if (!sum_images(argv[a], cmtx, ofp))
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return(1);
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} else { /* generating vector/matrix */
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CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
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CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
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cm_free(Vmat);
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if (ofspec != NULL) { /* multiple vector files? */
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const char *wtype = (outfmt==DTascii) ? "w" : "wb";
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for (i = 0; i < nsteps; i++) {
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CMATRIX *rvec = cm_column(rmtx, i);
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sprintf(fnbuf, ofspec, i+1);
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if ((ofp = fopen(fnbuf, wtype)) == NULL) {
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fprintf(stderr,
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"%s: cannot open '%s' for output\n",
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progname, fnbuf);
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return(1);
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}
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#ifdef getc_unlocked
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flockfile(ofp);
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#endif
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if (headout) { /* header output */
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newheader("RADIANCE", ofp);
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printargs(argc, argv, ofp);
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fputnow(ofp);
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fprintf(ofp, "FRAME=%d\n", i+1);
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fprintf(ofp, "NROWS=%d\n", rvec->nrows);
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fputs("NCOLS=1\nNCOMP=3\n", ofp);
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fputformat((char *)cm_fmt_id[outfmt], ofp);
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fputc('\n', ofp);
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}
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cm_write(rvec, outfmt, ofp);
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if (fclose(ofp) == EOF) {
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fprintf(stderr,
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"%s: error writing to '%s'\n",
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progname, fnbuf);
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return(1);
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}
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ofp = stdout;
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cm_free(rvec);
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}
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} else {
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#ifdef getc_unlocked
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flockfile(ofp);
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#endif
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if (outfmt != DTascii)
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SET_FILE_BINARY(ofp);
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if (headout) { /* header output */
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newheader("RADIANCE", ofp);
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printargs(argc, argv, ofp);
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fputnow(ofp);
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fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
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fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
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fputs("NCOMP=3\n", ofp);
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fputformat((char *)cm_fmt_id[outfmt], ofp);
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fputc('\n', ofp);
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}
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cm_write(rmtx, outfmt, ofp);
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}
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cm_free(rmtx);
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}
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if (fflush(ofp) == EOF) { /* final clean-up */
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fprintf(stderr, "%s: write error on output\n", progname);
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return(1);
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}
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cm_free(cmtx);
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return(0);
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userr:
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fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d}] DCspec [skyf]\n",
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progname);
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fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d}] Vspec Tbsdf Dmat.dat [skyf]\n",
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progname);
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return(1);
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}
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