| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: dctimestep.c,v 2.54 2025/06/06 19:11:21 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Compute time-step result using Daylight Coefficient method. |
| 6 |
* |
| 7 |
* G. Ward |
| 8 |
*/ |
| 9 |
|
| 10 |
#include <ctype.h> |
| 11 |
#include "platform.h" |
| 12 |
#include "standard.h" |
| 13 |
#include "cmatrix.h" |
| 14 |
#include "platform.h" |
| 15 |
#include "resolu.h" |
| 16 |
|
| 17 |
/* Sum together a set of images and write result to fout */ |
| 18 |
static int |
| 19 |
sum_images(const char *fspec, const CMATRIX *cv, FILE *fout) |
| 20 |
{ |
| 21 |
static int runcnt = 0; |
| 22 |
int myDT = DTfromHeader; |
| 23 |
COLR *scanline = NULL; |
| 24 |
CMATRIX *pmat = NULL; |
| 25 |
int myXR=0, myYR=0; |
| 26 |
int i, y; |
| 27 |
|
| 28 |
if (cv->ncols != 1) |
| 29 |
error(INTERNAL, "expected vector in sum_images()"); |
| 30 |
for (i = cv->nrows; i-- > 0; ) { |
| 31 |
const int r = runcnt&1 ? i : cv->nrows-1 - i; |
| 32 |
const COLORV *scv = cv_lval(cv,r); |
| 33 |
int flat_file = 0; |
| 34 |
char fname[1024]; |
| 35 |
FILE *fp; |
| 36 |
long data_start; |
| 37 |
int dt, xr, yr; |
| 38 |
COLORV *psp; |
| 39 |
char *err; |
| 40 |
/* check for zero */ |
| 41 |
if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) && |
| 42 |
(myDT != DTfromHeader) | (i > 0)) |
| 43 |
continue; |
| 44 |
/* open next picture */ |
| 45 |
sprintf(fname, fspec, r); |
| 46 |
if ((fp = fopen(fname, "rb")) == NULL) { |
| 47 |
sprintf(errmsg, "cannot open picture '%s'", fname); |
| 48 |
error(SYSTEM, errmsg); |
| 49 |
} |
| 50 |
#ifdef getc_unlocked |
| 51 |
flockfile(fp); |
| 52 |
#endif |
| 53 |
dt = DTfromHeader; |
| 54 |
if ((err = cm_getheader(&dt, NULL, NULL, NULL, NULL, fp)) != NULL) |
| 55 |
error(USER, err); |
| 56 |
if ((dt != DTrgbe) & (dt != DTxyze) || |
| 57 |
!fscnresolu(&xr, &yr, fp)) { |
| 58 |
sprintf(errmsg, "file '%s' not a picture", fname); |
| 59 |
error(USER, errmsg); |
| 60 |
} |
| 61 |
if (myDT == DTfromHeader) { /* on first one */ |
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myDT = dt; |
| 63 |
myXR = xr; myYR = yr; |
| 64 |
scanline = (COLR *)malloc(sizeof(COLR)*myXR); |
| 65 |
if (scanline == NULL) |
| 66 |
error(SYSTEM, "out of memory in sum_images()"); |
| 67 |
pmat = cm_alloc(myYR, myXR); |
| 68 |
memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR); |
| 69 |
/* finish header */ |
| 70 |
fputformat(cm_fmt_id[myDT], fout); |
| 71 |
fputc('\n', fout); |
| 72 |
fflush(fout); |
| 73 |
} else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) { |
| 74 |
sprintf(errmsg, "picture '%s' format/size mismatch", |
| 75 |
fname); |
| 76 |
error(USER, errmsg); |
| 77 |
} |
| 78 |
/* flat file check */ |
| 79 |
if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) { |
| 80 |
flat_file = (ftell(fp) >= data_start + sizeof(COLR)*xr*yr); |
| 81 |
if (fseek(fp, data_start, SEEK_SET) < 0) { |
| 82 |
sprintf(errmsg, "cannot seek on picture '%s'", fname); |
| 83 |
error(SYSTEM, errmsg); |
| 84 |
} |
| 85 |
} |
| 86 |
psp = pmat->cmem; |
| 87 |
for (y = 0; y < yr; y++) { /* read it in */ |
| 88 |
COLOR col; |
| 89 |
int x; |
| 90 |
if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr : |
| 91 |
freadcolrs(scanline, xr, fp) < 0) { |
| 92 |
sprintf(errmsg, "error reading picture '%s'", |
| 93 |
fname); |
| 94 |
error(SYSTEM, errmsg); |
| 95 |
} |
| 96 |
/* sum in scanline */ |
| 97 |
for (x = 0; x < xr; x++, psp += 3) { |
| 98 |
if (!scanline[x][EXP]) |
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continue; /* skip zeroes */ |
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colr_color(col, scanline[x]); |
| 101 |
multcolor(col, scv); |
| 102 |
addcolor(psp, col); |
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} |
| 104 |
} |
| 105 |
fclose(fp); /* done this picture */ |
| 106 |
} |
| 107 |
free(scanline); |
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i = cm_write(pmat, myDT, fout); /* write picture */ |
| 109 |
cm_free(pmat); /* free data */ |
| 110 |
++runcnt; /* for zig-zagging */ |
| 111 |
return(i); |
| 112 |
} |
| 113 |
|
| 114 |
/* adjust matrix dimensions according to user size(s) */ |
| 115 |
static int |
| 116 |
alt_dim(CMATRIX *cm, int nr, int nc) |
| 117 |
{ |
| 118 |
if ((nr <= 0) & (nc <= 0)) |
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return(0); |
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if ((nr == cm->nrows) & (nc == cm->ncols)) |
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return(0); |
| 122 |
if (nr > 0) { |
| 123 |
if (nc <= 0) |
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nc = cm->nrows*cm->ncols/nr; |
| 125 |
if (nr*nc != cm->nrows*cm->ncols) { |
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fprintf(stderr, "Bad dimensions: %dx%d != %dx%d\n", |
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nr, nc, cm->nrows, cm->ncols); |
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return(-1); |
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} |
| 130 |
} else /* nc > 0 */ { |
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nr = cm->nrows*cm->ncols/nc; |
| 132 |
if (nc*nr != cm->nrows*cm->ncols) { |
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fprintf(stderr, "Bad dimensions: %d does not divide %dx%d evenly\n", |
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nc, cm->nrows, cm->ncols); |
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return(-1); |
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} |
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} |
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cm->nrows = nr; |
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cm->ncols = nc; |
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return(1); |
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} |
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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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|
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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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|
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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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int xres=0, yres=0; |
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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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/* set global progname */ |
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fixargv0(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; |
| 218 |
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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case 'c': |
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outfmt = DTrgbe; |
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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 'x': |
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xres = atoi(argv[++a]); |
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break; |
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case 'y': |
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yres = atoi(argv[++a]); |
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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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|
| 243 |
if (argc-a > 2) { /* VTDs expression */ |
| 244 |
CMATRIX *smtx, *Dmat, *Tmat, *imtx; |
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const char *ccp; |
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/* get sky vector/matrix */ |
| 247 |
smtx = cm_load(argv[a+3], 0, nsteps, skyfmt); |
| 248 |
nsteps = smtx->ncols; |
| 249 |
/* load BSDF */ |
| 250 |
if (argv[a+1][0] != '!' && |
| 251 |
(ccp = strrchr(argv[a+1], '.')) > argv[a+1] && |
| 252 |
!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); |
| 256 |
/* load Daylight matrix */ |
| 257 |
Dmat = cm_load(argv[a+2], Tmat->ncols, |
| 258 |
smtx->nrows, DTfromHeader); |
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/* multiply vector through */ |
| 260 |
imtx = cm_multiply(Dmat, smtx); |
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cm_free(Dmat); cm_free(smtx); |
| 262 |
cmtx = cm_multiply(Tmat, imtx); |
| 263 |
cm_free(Tmat); |
| 264 |
cm_free(imtx); |
| 265 |
} else { /* sky vector/matrix only */ |
| 266 |
cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt); |
| 267 |
nsteps = cmtx->ncols; |
| 268 |
} |
| 269 |
/* prepare output stream */ |
| 270 |
if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) { |
| 271 |
sprintf(fnbuf, ofspec, 0); |
| 272 |
ofspec = fnbuf; |
| 273 |
} |
| 274 |
if (ofspec != NULL && !hasNumberFormat(ofspec)) { |
| 275 |
if ((ofp = fopen(ofspec, "w")) == NULL) { |
| 276 |
fprintf(stderr, "%s: cannot open '%s' for output\n", |
| 277 |
progname, ofspec); |
| 278 |
return(1); |
| 279 |
} |
| 280 |
ofspec = NULL; /* only need to open once */ |
| 281 |
} |
| 282 |
if (hasNumberFormat(argv[a])) { /* loading image vector(s) */ |
| 283 |
if (outfmt != DTrgbe) { |
| 284 |
error(WARNING, "changing output type to -oc"); |
| 285 |
outfmt = DTrgbe; |
| 286 |
} |
| 287 |
if (ofspec == NULL) { |
| 288 |
SET_FILE_BINARY(ofp); |
| 289 |
newheader("RADIANCE", ofp); |
| 290 |
printargs(argc, argv, ofp); |
| 291 |
fputnow(ofp); |
| 292 |
} |
| 293 |
if (nsteps > 1) /* multiple output frames? */ |
| 294 |
for (i = 0; i < nsteps; i++) { |
| 295 |
CMATRIX *cvec = cm_column(cmtx, i); |
| 296 |
if (ofspec != NULL) { |
| 297 |
sprintf(fnbuf, ofspec, i); |
| 298 |
if ((ofp = fopen(fnbuf, "wb")) == NULL) { |
| 299 |
fprintf(stderr, |
| 300 |
"%s: cannot open '%s' for output\n", |
| 301 |
progname, fnbuf); |
| 302 |
return(1); |
| 303 |
} |
| 304 |
newheader("RADIANCE", ofp); |
| 305 |
printargs(argc, argv, ofp); |
| 306 |
fputnow(ofp); |
| 307 |
} |
| 308 |
fprintf(ofp, "FRAME=%d\n", i); |
| 309 |
if (!sum_images(argv[a], cvec, ofp)) |
| 310 |
return(1); |
| 311 |
if (ofspec != NULL) { |
| 312 |
if (fclose(ofp) == EOF) { |
| 313 |
fprintf(stderr, |
| 314 |
"%s: error writing to '%s'\n", |
| 315 |
progname, fnbuf); |
| 316 |
return(1); |
| 317 |
} |
| 318 |
ofp = stdout; |
| 319 |
} |
| 320 |
cm_free(cvec); |
| 321 |
} |
| 322 |
else if (!sum_images(argv[a], cmtx, ofp)) |
| 323 |
return(1); |
| 324 |
} else { /* loading view matrix */ |
| 325 |
CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader); |
| 326 |
CMATRIX *rmtx = cm_multiply(Vmat, cmtx); |
| 327 |
cm_free(Vmat); |
| 328 |
if (ofspec != NULL) { /* multiple vector files? */ |
| 329 |
const char *wtype = (outfmt==DTascii) ? "w" : "wb"; |
| 330 |
for (i = 0; i < nsteps; i++) { |
| 331 |
CMATRIX *rvec = cm_column(rmtx, i); |
| 332 |
if (alt_dim(rvec, yres, xres) < 0) |
| 333 |
return(1); |
| 334 |
sprintf(fnbuf, ofspec, i); |
| 335 |
if ((ofp = fopen(fnbuf, wtype)) == NULL) { |
| 336 |
fprintf(stderr, |
| 337 |
"%s: cannot open '%s' for output\n", |
| 338 |
progname, fnbuf); |
| 339 |
return(1); |
| 340 |
} |
| 341 |
#ifdef getc_unlocked |
| 342 |
flockfile(ofp); |
| 343 |
#endif |
| 344 |
if (headout) { /* header output */ |
| 345 |
newheader("RADIANCE", ofp); |
| 346 |
printargs(argc, argv, ofp); |
| 347 |
fputnow(ofp); |
| 348 |
fprintf(ofp, "FRAME=%d\n", i); |
| 349 |
if ((outfmt != DTrgbe) & (outfmt != DTxyze)) { |
| 350 |
fprintf(ofp, "NROWS=%d\n", rvec->nrows); |
| 351 |
fprintf(ofp, "NCOLS=%d\n", rvec->ncols); |
| 352 |
fputncomp(3, ofp); |
| 353 |
} |
| 354 |
if ((outfmt == DTfloat) | (outfmt == DTdouble)) |
| 355 |
fputendian(ofp); |
| 356 |
fputformat(cm_fmt_id[outfmt], ofp); |
| 357 |
fputc('\n', ofp); |
| 358 |
} |
| 359 |
cm_write(rvec, outfmt, ofp); |
| 360 |
if (fclose(ofp) == EOF) { |
| 361 |
fprintf(stderr, |
| 362 |
"%s: error writing to '%s'\n", |
| 363 |
progname, fnbuf); |
| 364 |
return(1); |
| 365 |
} |
| 366 |
ofp = stdout; |
| 367 |
cm_free(rvec); |
| 368 |
} |
| 369 |
} else { |
| 370 |
#ifdef getc_unlocked |
| 371 |
flockfile(ofp); |
| 372 |
#endif |
| 373 |
if (outfmt != DTascii) |
| 374 |
SET_FILE_BINARY(ofp); |
| 375 |
if (alt_dim(rmtx, yres, xres) < 0) |
| 376 |
return(1); |
| 377 |
if (headout) { /* header output */ |
| 378 |
newheader("RADIANCE", ofp); |
| 379 |
printargs(argc, argv, ofp); |
| 380 |
fputnow(ofp); |
| 381 |
if ((outfmt != DTrgbe) & (outfmt != DTxyze)) { |
| 382 |
fprintf(ofp, "NROWS=%d\n", rmtx->nrows); |
| 383 |
fprintf(ofp, "NCOLS=%d\n", rmtx->ncols); |
| 384 |
fputncomp(3, ofp); |
| 385 |
} |
| 386 |
if ((outfmt == DTfloat) | (outfmt == DTdouble)) |
| 387 |
fputendian(ofp); |
| 388 |
fputformat(cm_fmt_id[outfmt], ofp); |
| 389 |
fputc('\n', ofp); |
| 390 |
} |
| 391 |
cm_write(rmtx, outfmt, ofp); |
| 392 |
} |
| 393 |
cm_free(rmtx); |
| 394 |
} |
| 395 |
if (fflush(ofp) == EOF) { /* final clean-up */ |
| 396 |
fprintf(stderr, "%s: write error on output\n", progname); |
| 397 |
return(1); |
| 398 |
} |
| 399 |
cm_free(cmtx); |
| 400 |
return(0); |
| 401 |
userr: |
| 402 |
fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f|d|h}][-o{f|d|c}] DCspec [skyf]\n", |
| 403 |
progname); |
| 404 |
fprintf(stderr, " or: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f|d|h}][-o{f|d|c}] Vspec Tbsdf Dmat.dat [skyf]\n", |
| 405 |
progname); |
| 406 |
return(1); |
| 407 |
} |
