| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: dctimestep.c,v 2.1 2009/06/17 20:41:47 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 "standard.h" |
| 12 |
#include "platform.h" |
| 13 |
#include "color.h" |
| 14 |
#include "resolu.h" |
| 15 |
#include "bsdf.h" |
| 16 |
|
| 17 |
char *progname; /* global argv[0] */ |
| 18 |
|
| 19 |
/* Data types for file loading */ |
| 20 |
enum {DTfromHeader, DTascii, DTfloat, DTdouble, DTrgbe, DTxyze}; |
| 21 |
|
| 22 |
/* A color coefficient matrix -- vectors have ncols==1 */ |
| 23 |
typedef struct { |
| 24 |
int nrows, ncols; |
| 25 |
COLORV cmem[3]; /* extends struct */ |
| 26 |
} CMATRIX; |
| 27 |
|
| 28 |
#define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf") |
| 29 |
|
| 30 |
#define cm_lval(cm,r,c) ((cm)->cmem + 3*((r)*(cm)->ncols + (c))) |
| 31 |
|
| 32 |
#define cv_lval(cm,i) ((cm)->cmem + 3*(i)) |
| 33 |
|
| 34 |
/* Allocate a color coefficient matrix */ |
| 35 |
static CMATRIX * |
| 36 |
cm_alloc(int nrows, int ncols) |
| 37 |
{ |
| 38 |
CMATRIX *cm; |
| 39 |
|
| 40 |
if ((nrows <= 0) | (ncols <= 0)) |
| 41 |
return(NULL); |
| 42 |
cm = (CMATRIX *)malloc(sizeof(CMATRIX) + |
| 43 |
3*sizeof(COLORV)*(nrows*ncols - 1)); |
| 44 |
if (cm == NULL) |
| 45 |
error(SYSTEM, "out of memory in cm_alloc()"); |
| 46 |
cm->nrows = nrows; |
| 47 |
cm->ncols = ncols; |
| 48 |
return(cm); |
| 49 |
} |
| 50 |
|
| 51 |
#define cm_free(cm) free(cm) |
| 52 |
|
| 53 |
/* Resize color coefficient matrix */ |
| 54 |
static CMATRIX * |
| 55 |
cm_resize(CMATRIX *cm, int nrows) |
| 56 |
{ |
| 57 |
if (nrows == cm->nrows) |
| 58 |
return(cm); |
| 59 |
if (nrows <= 0) { |
| 60 |
cm_free(cm); |
| 61 |
return(NULL); |
| 62 |
} |
| 63 |
cm = (CMATRIX *)realloc(cm, sizeof(CMATRIX) + |
| 64 |
3*sizeof(COLORV)*(nrows*cm->ncols - 1)); |
| 65 |
if (cm == NULL) |
| 66 |
error(SYSTEM, "out of memory in cm_resize()"); |
| 67 |
cm->nrows = nrows; |
| 68 |
return(cm); |
| 69 |
} |
| 70 |
|
| 71 |
/* Load header to obtain data type */ |
| 72 |
static int |
| 73 |
getDT(char *s, void *p) |
| 74 |
{ |
| 75 |
char fmt[32]; |
| 76 |
|
| 77 |
if (formatval(fmt, s)) { |
| 78 |
if (!strcmp(fmt, "ascii")) |
| 79 |
*((int *)p) = DTascii; |
| 80 |
else if (!strcmp(fmt, "float")) |
| 81 |
*((int *)p) = DTfloat; |
| 82 |
else if (!strcmp(fmt, "double")) |
| 83 |
*((int *)p) = DTdouble; |
| 84 |
else if (!strcmp(fmt, COLRFMT)) |
| 85 |
*((int *)p) = DTrgbe; |
| 86 |
else if (!strcmp(fmt, CIEFMT)) |
| 87 |
*((int *)p) = DTxyze; |
| 88 |
} |
| 89 |
return(0); |
| 90 |
} |
| 91 |
|
| 92 |
static int |
| 93 |
getDTfromHeader(FILE *fp) |
| 94 |
{ |
| 95 |
int dt = DTfromHeader; |
| 96 |
|
| 97 |
if (getheader(fp, getDT, &dt) < 0) |
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error(SYSTEM, "header read error"); |
| 99 |
if (dt == DTfromHeader) |
| 100 |
error(USER, "missing data format in header"); |
| 101 |
return(dt); |
| 102 |
} |
| 103 |
|
| 104 |
/* Allocate and load a matrix from the given file (or stdin if NULL) */ |
| 105 |
static CMATRIX * |
| 106 |
cm_load(const char *fname, int nrows, int ncols, int dtype) |
| 107 |
{ |
| 108 |
CMATRIX *cm; |
| 109 |
FILE *fp = stdin; |
| 110 |
|
| 111 |
if (fname == NULL) |
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fname = "<stdin>"; |
| 113 |
else if ((fp = fopen(fname, "r")) == NULL) { |
| 114 |
sprintf(errmsg, "cannot open file '%s'", fname); |
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error(SYSTEM, errmsg); |
| 116 |
} |
| 117 |
if (dtype != DTascii) |
| 118 |
SET_FILE_BINARY(fp); |
| 119 |
if (dtype == DTfromHeader) |
| 120 |
dtype = getDTfromHeader(fp); |
| 121 |
switch (dtype) { |
| 122 |
case DTascii: |
| 123 |
case DTfloat: |
| 124 |
case DTdouble: |
| 125 |
break; |
| 126 |
default: |
| 127 |
error(USER, "unexpected data type in cm_load()"); |
| 128 |
} |
| 129 |
if (nrows <= 0) { /* don't know length? */ |
| 130 |
int guessrows = 147; /* usually big enough */ |
| 131 |
if ((dtype != DTascii) & (fp != stdin)) { |
| 132 |
long startpos = ftell(fp); |
| 133 |
if (fseek(fp, 0L, SEEK_END) == 0) { |
| 134 |
long endpos = ftell(fp); |
| 135 |
long elemsiz = 3*(dtype==DTfloat ? |
| 136 |
sizeof(float) : sizeof(double)); |
| 137 |
|
| 138 |
if ((endpos - startpos) % (ncols*elemsiz)) { |
| 139 |
sprintf(errmsg, |
| 140 |
"improper length for binary file '%s'", |
| 141 |
fname); |
| 142 |
error(USER, errmsg); |
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} |
| 144 |
guessrows = (endpos - startpos)/(ncols*elemsiz); |
| 145 |
if (fseek(fp, startpos, SEEK_SET) < 0) { |
| 146 |
sprintf(errmsg, |
| 147 |
"fseek() error on file '%s'", |
| 148 |
fname); |
| 149 |
error(SYSTEM, errmsg); |
| 150 |
} |
| 151 |
nrows = guessrows; /* we're confident */ |
| 152 |
} |
| 153 |
} |
| 154 |
cm = cm_alloc(guessrows, ncols); |
| 155 |
} else |
| 156 |
cm = cm_alloc(nrows, ncols); |
| 157 |
if (cm == NULL) |
| 158 |
return(NULL); |
| 159 |
if (dtype == DTascii) { /* read text file */ |
| 160 |
int maxrow = (nrows > 0 ? nrows : 32000); |
| 161 |
int r, c; |
| 162 |
for (r = 0; r < maxrow; r++) { |
| 163 |
if (r >= cm->nrows) /* need more space? */ |
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cm = cm_resize(cm, 2*cm->nrows); |
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for (c = 0; c < ncols; c++) { |
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COLORV *cv = cm_lval(cm,r,c); |
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if (fscanf(fp, COLSPEC, cv, cv+1, cv+2) != 3) |
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if ((nrows <= 0) & (r > 0) & (c == 0)) { |
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cm = cm_resize(cm, maxrow=r); |
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break; |
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} else |
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goto EOFerror; |
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} |
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} |
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while ((c = getc(fp)) != EOF) |
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if (!isspace(c)) { |
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sprintf(errmsg, |
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"unexpected data at end of ascii file %s", |
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fname); |
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error(WARNING, errmsg); |
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break; |
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} |
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} else { /* read binary file */ |
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if (sizeof(COLORV) == (dtype==DTfloat ? sizeof(float) : |
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sizeof(double))) { |
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int nread = 0; |
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do { /* read all we can */ |
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nread += fread(cm->cmem + 3*nread, |
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3*sizeof(COLORV), |
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cm->nrows*cm->ncols - nread, |
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fp); |
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if (nrows <= 0) { /* unknown length */ |
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if (nread == cm->nrows*cm->ncols) |
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/* need more space? */ |
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cm = cm_resize(cm, 2*cm->nrows); |
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else if (nread % cm->ncols == 0) |
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/* seem to be done */ |
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cm = cm_resize(cm, nread/cm->ncols); |
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else /* ended mid-row */ |
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goto EOFerror; |
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} else if (nread < cm->nrows*cm->ncols) |
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goto EOFerror; |
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} while (nread < cm->nrows*cm->ncols); |
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|
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} else if (dtype == DTdouble) { |
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double dc[3]; /* load from double */ |
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COLORV *cvp = cm->cmem; |
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int n = nrows*ncols; |
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|
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if (n <= 0) |
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goto not_handled; |
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while (n--) { |
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if (fread(dc, sizeof(double), 3, fp) != 3) |
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goto EOFerror; |
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copycolor(cvp, dc); |
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cvp += 3; |
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} |
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} else /* dtype == DTfloat */ { |
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float fc[3]; /* load from float */ |
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COLORV *cvp = cm->cmem; |
| 221 |
int n = nrows*ncols; |
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|
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if (n <= 0) |
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goto not_handled; |
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while (n--) { |
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if (fread(fc, sizeof(float), 3, fp) != 3) |
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goto EOFerror; |
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copycolor(cvp, fc); |
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cvp += 3; |
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} |
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} |
| 232 |
if (getc(fp) != EOF) { |
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sprintf(errmsg, |
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"unexpected data at end of binary file %s", |
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fname); |
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error(WARNING, errmsg); |
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} |
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} |
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if (fp != stdin) |
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fclose(fp); |
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return(cm); |
| 242 |
EOFerror: |
| 243 |
sprintf(errmsg, "unexpected EOF reading %s", |
| 244 |
fname); |
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error(USER, errmsg); |
| 246 |
not_handled: |
| 247 |
error(INTERNAL, "unhandled data size or length in cm_load()"); |
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return(NULL); /* gratis return */ |
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} |
| 250 |
|
| 251 |
/* Multiply two matrices (or a matrix and a vector) and allocate the result*/ |
| 252 |
static CMATRIX * |
| 253 |
cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2) |
| 254 |
{ |
| 255 |
CMATRIX *cmr; |
| 256 |
int dr, dc, i; |
| 257 |
|
| 258 |
if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows)) |
| 259 |
error(INTERNAL, "matrix dimension mismatch in cm_multiply()"); |
| 260 |
cmr = cm_alloc(cm1->nrows, cm2->ncols); |
| 261 |
if (cmr == NULL) |
| 262 |
return(NULL); |
| 263 |
for (dr = 0; dr < cmr->nrows; dr++) |
| 264 |
for (dc = 0; dc < cmr->ncols; dc++) { |
| 265 |
COLORV *dp = cm_lval(cmr,dr,dc); |
| 266 |
dp[0] = dp[1] = dp[2] = 0; |
| 267 |
for (i = 0; i < cm1->ncols; i++) { |
| 268 |
const COLORV *cp1 = cm_lval(cm1,dr,i); |
| 269 |
const COLORV *cp2 = cm_lval(cm2,i,dc); |
| 270 |
dp[0] += cp1[0] * cp2[0]; |
| 271 |
dp[1] += cp1[1] * cp2[1]; |
| 272 |
dp[2] += cp1[2] * cp2[2]; |
| 273 |
} |
| 274 |
} |
| 275 |
return(cmr); |
| 276 |
} |
| 277 |
|
| 278 |
/* print out matrix as ASCII text -- no header */ |
| 279 |
static void |
| 280 |
cm_print(const CMATRIX *cm, FILE *fp) |
| 281 |
{ |
| 282 |
int r, c; |
| 283 |
const COLORV *mp = cm->cmem; |
| 284 |
|
| 285 |
for (r = 0; r < cm->nrows; r++) { |
| 286 |
for (c = 0; c < cm->ncols; c++, mp += 3) |
| 287 |
fprintf(fp, "\t%.6e %.6e %.6e", mp[0], mp[1], mp[2]); |
| 288 |
fputc('\n', fp); |
| 289 |
} |
| 290 |
} |
| 291 |
|
| 292 |
/* convert a BSDF to our matrix representation */ |
| 293 |
static CMATRIX * |
| 294 |
cm_bsdf(const struct BSDF_data *bsdf) |
| 295 |
{ |
| 296 |
CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc); |
| 297 |
COLORV *mp = cm->cmem; |
| 298 |
int r, c; |
| 299 |
|
| 300 |
for (r = 0; r < cm->nrows; r++) |
| 301 |
for (c = 0; c < cm->ncols; c++, mp += 3) |
| 302 |
mp[0] = mp[1] = mp[2] = BSDF_value(bsdf,c,r); |
| 303 |
return(cm); |
| 304 |
} |
| 305 |
|
| 306 |
/* Sum together a set of images and write result to stdout */ |
| 307 |
static int |
| 308 |
sum_images(const char *fspec, const CMATRIX *cv) |
| 309 |
{ |
| 310 |
int myDT = DTfromHeader; |
| 311 |
CMATRIX *pmat; |
| 312 |
COLOR *scanline; |
| 313 |
int myXR, myYR; |
| 314 |
int i, y; |
| 315 |
|
| 316 |
if (cv->ncols != 1) |
| 317 |
error(INTERNAL, "expected vector in sum_images()"); |
| 318 |
for (i = 0; i < cv->nrows; i++) { |
| 319 |
const COLORV *scv = cv_lval(cv,i); |
| 320 |
char fname[1024]; |
| 321 |
FILE *fp; |
| 322 |
int dt, xr, yr; |
| 323 |
COLORV *psp; |
| 324 |
/* open next picture */ |
| 325 |
sprintf(fname, fspec, i); |
| 326 |
if ((fp = fopen(fname, "r")) == NULL) { |
| 327 |
sprintf(errmsg, "cannot open picture '%s'", fname); |
| 328 |
error(SYSTEM, errmsg); |
| 329 |
} |
| 330 |
SET_FILE_BINARY(fp); |
| 331 |
dt = getDTfromHeader(fp); |
| 332 |
if ((dt != DTrgbe) & (dt != DTxyze) || |
| 333 |
!fscnresolu(&xr, &yr, fp)) { |
| 334 |
sprintf(errmsg, "file '%s' not a picture", fname); |
| 335 |
error(USER, errmsg); |
| 336 |
} |
| 337 |
if (myDT == DTfromHeader) { /* on first one */ |
| 338 |
myDT = dt; |
| 339 |
myXR = xr; myYR = yr; |
| 340 |
scanline = (COLOR *)malloc(sizeof(COLOR)*myXR); |
| 341 |
if (scanline == NULL) |
| 342 |
error(SYSTEM, "out of memory in sum_images()"); |
| 343 |
pmat = cm_alloc(myYR, myXR); |
| 344 |
memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR); |
| 345 |
/* finish header */ |
| 346 |
fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, stdout); |
| 347 |
fputc('\n', stdout); |
| 348 |
fprtresolu(myXR, myYR, stdout); |
| 349 |
fflush(stdout); |
| 350 |
} else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) { |
| 351 |
sprintf(errmsg, "picture '%s' format/size mismatch", |
| 352 |
fname); |
| 353 |
error(USER, errmsg); |
| 354 |
} |
| 355 |
psp = pmat->cmem; |
| 356 |
for (y = 0; y < yr; y++) { /* read it in */ |
| 357 |
int x; |
| 358 |
if (freadscan(scanline, xr, fp) < 0) { |
| 359 |
sprintf(errmsg, "error reading picture '%s'", |
| 360 |
fname); |
| 361 |
error(SYSTEM, errmsg); |
| 362 |
} |
| 363 |
/* sum in scanline */ |
| 364 |
for (x = 0; x < xr; x++, psp += 3) { |
| 365 |
multcolor(scanline[x], scv); |
| 366 |
addcolor(psp, scanline[x]); |
| 367 |
} |
| 368 |
} |
| 369 |
fclose(fp); /* done this picture */ |
| 370 |
} |
| 371 |
free(scanline); |
| 372 |
/* write scanlines */ |
| 373 |
for (y = 0; y < myYR; y++) |
| 374 |
if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, stdout) < 0) |
| 375 |
return(0); |
| 376 |
cm_free(pmat); /* all done */ |
| 377 |
return(fflush(stdout) == 0); |
| 378 |
} |
| 379 |
|
| 380 |
/* check to see if a string contains a %d specification */ |
| 381 |
int |
| 382 |
hasDecimalSpec(const char *s) |
| 383 |
{ |
| 384 |
while (*s && *s != '%') |
| 385 |
s++; |
| 386 |
if (!*s) |
| 387 |
return(0); |
| 388 |
do |
| 389 |
++s; |
| 390 |
while (isdigit(*s)); |
| 391 |
|
| 392 |
return(*s == 'd'); |
| 393 |
} |
| 394 |
|
| 395 |
int |
| 396 |
main(int argc, char *argv[]) |
| 397 |
{ |
| 398 |
CMATRIX *tvec, *Dmat, *Tmat, *ivec, *cvec; |
| 399 |
struct BSDF_data *btdf; |
| 400 |
|
| 401 |
progname = argv[0]; |
| 402 |
|
| 403 |
if ((argc < 4) | (argc > 5)) { |
| 404 |
fprintf(stderr, "Usage: %s Vspec Tbsdf.xml Dmat.dat [tregvec]\n", |
| 405 |
progname); |
| 406 |
return(1); |
| 407 |
} |
| 408 |
tvec = cm_load(argv[4], 0, 1, DTascii); /* argv[4]==NULL iff argc==4 */ |
| 409 |
Dmat = cm_load(argv[3], 0, tvec->nrows, DTfromHeader); |
| 410 |
btdf = load_BSDF(argv[2]); |
| 411 |
if (btdf == NULL) |
| 412 |
return(1); |
| 413 |
if (btdf->ninc != Dmat->nrows) { |
| 414 |
sprintf(errmsg, "Incoming BTDF dir (%d) mismatch to D (%d)", |
| 415 |
btdf->ninc, Dmat->nrows); |
| 416 |
error(USER, errmsg); |
| 417 |
} |
| 418 |
/* multiply vector through */ |
| 419 |
ivec = cm_multiply(Dmat, tvec); |
| 420 |
cm_free(Dmat); cm_free(tvec); |
| 421 |
Tmat = cm_bsdf(btdf); /* convert BTDF to matrix */ |
| 422 |
free_BSDF(btdf); |
| 423 |
cvec = cm_multiply(Tmat, ivec); /* cvec = component vector */ |
| 424 |
cm_free(Tmat); cm_free(ivec); |
| 425 |
if (hasDecimalSpec(argv[1])) { /* generating image */ |
| 426 |
SET_FILE_BINARY(stdout); |
| 427 |
newheader("RADIANCE", stdout); |
| 428 |
printargs(argc, argv, stdout); |
| 429 |
fputnow(stdout); |
| 430 |
if (!sum_images(argv[1], cvec)) |
| 431 |
return(1); |
| 432 |
} else { /* generating vector */ |
| 433 |
CMATRIX *Vmat = cm_load(argv[1], 0, cvec->nrows, DTfromHeader); |
| 434 |
CMATRIX *rvec = cm_multiply(Vmat, cvec); |
| 435 |
cm_free(Vmat); |
| 436 |
cm_print(rvec, stdout); |
| 437 |
cm_free(rvec); |
| 438 |
} |
| 439 |
cm_free(cvec); /* final clean-up */ |
| 440 |
return(0); |
| 441 |
} |
