1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: dctimestep.c,v 2.26 2013/01/11 17:54:17 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 "paths.h" |
14 |
#include "color.h" |
15 |
#include "resolu.h" |
16 |
#include "bsdf.h" |
17 |
#include "bsdf_m.h" |
18 |
|
19 |
char *progname; /* global argv[0] */ |
20 |
|
21 |
/* Data types for file loading */ |
22 |
enum {DTfromHeader, DTascii, DTfloat, DTdouble, DTrgbe, DTxyze}; |
23 |
|
24 |
/* A color coefficient matrix -- vectors have ncols==1 */ |
25 |
typedef struct { |
26 |
int nrows, ncols; |
27 |
COLORV cmem[3]; /* extends struct */ |
28 |
} CMATRIX; |
29 |
|
30 |
#define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf") |
31 |
|
32 |
#define cm_lval(cm,r,c) ((cm)->cmem + 3*((r)*(cm)->ncols + (c))) |
33 |
|
34 |
#define cv_lval(cm,i) ((cm)->cmem + 3*(i)) |
35 |
|
36 |
/* Allocate a color coefficient matrix */ |
37 |
static CMATRIX * |
38 |
cm_alloc(int nrows, int ncols) |
39 |
{ |
40 |
CMATRIX *cm; |
41 |
|
42 |
if ((nrows <= 0) | (ncols <= 0)) |
43 |
error(USER, "attempt to create empty matrix"); |
44 |
cm = (CMATRIX *)malloc(sizeof(CMATRIX) + |
45 |
3*sizeof(COLORV)*(nrows*ncols - 1)); |
46 |
if (cm == NULL) |
47 |
error(SYSTEM, "out of memory in cm_alloc()"); |
48 |
cm->nrows = nrows; |
49 |
cm->ncols = ncols; |
50 |
return(cm); |
51 |
} |
52 |
|
53 |
#define cm_free(cm) free(cm) |
54 |
|
55 |
/* Resize color coefficient matrix */ |
56 |
static CMATRIX * |
57 |
cm_resize(CMATRIX *cm, int nrows) |
58 |
{ |
59 |
if (nrows == cm->nrows) |
60 |
return(cm); |
61 |
if (nrows <= 0) { |
62 |
cm_free(cm); |
63 |
return(NULL); |
64 |
} |
65 |
cm = (CMATRIX *)realloc(cm, sizeof(CMATRIX) + |
66 |
3*sizeof(COLORV)*(nrows*cm->ncols - 1)); |
67 |
if (cm == NULL) |
68 |
error(SYSTEM, "out of memory in cm_resize()"); |
69 |
cm->nrows = nrows; |
70 |
return(cm); |
71 |
} |
72 |
|
73 |
/* Load header to obtain data type */ |
74 |
static int |
75 |
getDT(char *s, void *p) |
76 |
{ |
77 |
char fmt[32]; |
78 |
|
79 |
if (formatval(fmt, s)) { |
80 |
if (!strcmp(fmt, "ascii")) |
81 |
*((int *)p) = DTascii; |
82 |
else if (!strcmp(fmt, "float")) |
83 |
*((int *)p) = DTfloat; |
84 |
else if (!strcmp(fmt, "double")) |
85 |
*((int *)p) = DTdouble; |
86 |
else if (!strcmp(fmt, COLRFMT)) |
87 |
*((int *)p) = DTrgbe; |
88 |
else if (!strcmp(fmt, CIEFMT)) |
89 |
*((int *)p) = DTxyze; |
90 |
} |
91 |
return(0); |
92 |
} |
93 |
|
94 |
static int |
95 |
getDTfromHeader(FILE *fp) |
96 |
{ |
97 |
int dt = DTfromHeader; |
98 |
|
99 |
if (getheader(fp, getDT, &dt) < 0) |
100 |
error(SYSTEM, "header read error"); |
101 |
if (dt == DTfromHeader) |
102 |
error(USER, "missing data format in header"); |
103 |
return(dt); |
104 |
} |
105 |
|
106 |
/* Allocate and load a matrix from the given file (or stdin if NULL) */ |
107 |
static CMATRIX * |
108 |
cm_load(const char *fname, int nrows, int ncols, int dtype) |
109 |
{ |
110 |
FILE *fp = stdin; |
111 |
CMATRIX *cm; |
112 |
|
113 |
if (ncols <= 0) |
114 |
error(USER, "Non-positive number of columns"); |
115 |
if (fname == NULL) |
116 |
fname = "<stdin>"; |
117 |
else if ((fp = fopen(fname, "r")) == NULL) { |
118 |
sprintf(errmsg, "cannot open file '%s'", fname); |
119 |
error(SYSTEM, errmsg); |
120 |
} |
121 |
#ifdef getc_unlocked |
122 |
flockfile(fp); |
123 |
#endif |
124 |
if (dtype != DTascii) |
125 |
SET_FILE_BINARY(fp); /* doesn't really work */ |
126 |
if (dtype == DTfromHeader) |
127 |
dtype = getDTfromHeader(fp); |
128 |
switch (dtype) { |
129 |
case DTascii: |
130 |
case DTfloat: |
131 |
case DTdouble: |
132 |
break; |
133 |
default: |
134 |
error(USER, "unexpected data type in cm_load()"); |
135 |
} |
136 |
if (nrows <= 0) { /* don't know length? */ |
137 |
int guessrows = 147; /* usually big enough */ |
138 |
if ((dtype != DTascii) & (fp != stdin)) { |
139 |
long startpos = ftell(fp); |
140 |
if (fseek(fp, 0L, SEEK_END) == 0) { |
141 |
long endpos = ftell(fp); |
142 |
long elemsiz = 3*(dtype==DTfloat ? |
143 |
sizeof(float) : sizeof(double)); |
144 |
|
145 |
if ((endpos - startpos) % (ncols*elemsiz)) { |
146 |
sprintf(errmsg, |
147 |
"improper length for binary file '%s'", |
148 |
fname); |
149 |
error(USER, errmsg); |
150 |
} |
151 |
guessrows = (endpos - startpos)/(ncols*elemsiz); |
152 |
if (fseek(fp, startpos, SEEK_SET) < 0) { |
153 |
sprintf(errmsg, |
154 |
"fseek() error on file '%s'", |
155 |
fname); |
156 |
error(SYSTEM, errmsg); |
157 |
} |
158 |
nrows = guessrows; /* we're confident */ |
159 |
} |
160 |
} |
161 |
cm = cm_alloc(guessrows, ncols); |
162 |
} else |
163 |
cm = cm_alloc(nrows, ncols); |
164 |
if (cm == NULL) /* XXX never happens */ |
165 |
return(NULL); |
166 |
if (dtype == DTascii) { /* read text file */ |
167 |
int maxrow = (nrows > 0 ? nrows : 32000); |
168 |
int r, c; |
169 |
for (r = 0; r < maxrow; r++) { |
170 |
if (r >= cm->nrows) /* need more space? */ |
171 |
cm = cm_resize(cm, 2*cm->nrows); |
172 |
for (c = 0; c < ncols; c++) { |
173 |
COLORV *cv = cm_lval(cm,r,c); |
174 |
if (fscanf(fp, COLSPEC, cv, cv+1, cv+2) != 3) |
175 |
if ((nrows <= 0) & (r > 0) & !c) { |
176 |
cm = cm_resize(cm, maxrow=r); |
177 |
break; |
178 |
} else |
179 |
goto EOFerror; |
180 |
} |
181 |
} |
182 |
while ((c = getc(fp)) != EOF) |
183 |
if (!isspace(c)) { |
184 |
sprintf(errmsg, |
185 |
"unexpected data at end of ascii file %s", |
186 |
fname); |
187 |
error(WARNING, errmsg); |
188 |
break; |
189 |
} |
190 |
} else { /* read binary file */ |
191 |
if (sizeof(COLORV) == (dtype==DTfloat ? sizeof(float) : |
192 |
sizeof(double))) { |
193 |
int nread = 0; |
194 |
do { /* read all we can */ |
195 |
nread += fread(cm->cmem + 3*nread, |
196 |
3*sizeof(COLORV), |
197 |
cm->nrows*cm->ncols - nread, |
198 |
fp); |
199 |
if (nrows <= 0) { /* unknown length */ |
200 |
if (nread == cm->nrows*cm->ncols) |
201 |
/* need more space? */ |
202 |
cm = cm_resize(cm, 2*cm->nrows); |
203 |
else if (nread && !(nread % cm->ncols)) |
204 |
/* seem to be done */ |
205 |
cm = cm_resize(cm, nread/cm->ncols); |
206 |
else /* ended mid-row */ |
207 |
goto EOFerror; |
208 |
} else if (nread < cm->nrows*cm->ncols) |
209 |
goto EOFerror; |
210 |
} while (nread < cm->nrows*cm->ncols); |
211 |
|
212 |
} else if (dtype == DTdouble) { |
213 |
double dc[3]; /* load from double */ |
214 |
COLORV *cvp = cm->cmem; |
215 |
int n = nrows*ncols; |
216 |
|
217 |
if (n <= 0) |
218 |
goto not_handled; |
219 |
while (n--) { |
220 |
if (fread(dc, sizeof(double), 3, fp) != 3) |
221 |
goto EOFerror; |
222 |
copycolor(cvp, dc); |
223 |
cvp += 3; |
224 |
} |
225 |
} else /* dtype == DTfloat */ { |
226 |
float fc[3]; /* load from float */ |
227 |
COLORV *cvp = cm->cmem; |
228 |
int n = nrows*ncols; |
229 |
|
230 |
if (n <= 0) |
231 |
goto not_handled; |
232 |
while (n--) { |
233 |
if (fread(fc, sizeof(float), 3, fp) != 3) |
234 |
goto EOFerror; |
235 |
copycolor(cvp, fc); |
236 |
cvp += 3; |
237 |
} |
238 |
} |
239 |
if (fgetc(fp) != EOF) { |
240 |
sprintf(errmsg, |
241 |
"unexpected data at end of binary file %s", |
242 |
fname); |
243 |
error(WARNING, errmsg); |
244 |
} |
245 |
} |
246 |
if (fp != stdin) |
247 |
fclose(fp); |
248 |
#ifdef getc_unlocked |
249 |
else |
250 |
funlockfile(fp); |
251 |
#endif |
252 |
return(cm); |
253 |
EOFerror: |
254 |
sprintf(errmsg, "unexpected EOF reading %s", fname); |
255 |
error(USER, errmsg); |
256 |
not_handled: |
257 |
error(INTERNAL, "unhandled data size or length in cm_load()"); |
258 |
return(NULL); /* gratis return */ |
259 |
} |
260 |
|
261 |
/* Extract a column vector from a matrix */ |
262 |
static CMATRIX * |
263 |
cm_column(const CMATRIX *cm, int c) |
264 |
{ |
265 |
CMATRIX *cvr; |
266 |
int dr; |
267 |
|
268 |
if ((c < 0) | (c >= cm->ncols)) |
269 |
error(INTERNAL, "column requested outside matrix"); |
270 |
cvr = cm_alloc(cm->nrows, 1); |
271 |
if (cvr == NULL) |
272 |
return(NULL); |
273 |
for (dr = 0; dr < cm->nrows; dr++) { |
274 |
const COLORV *sp = cm_lval(cm,dr,c); |
275 |
COLORV *dp = cv_lval(cvr,dr); |
276 |
dp[0] = sp[0]; |
277 |
dp[1] = sp[1]; |
278 |
dp[2] = sp[2]; |
279 |
} |
280 |
return(cvr); |
281 |
} |
282 |
|
283 |
/* Scale a matrix by a single value */ |
284 |
static CMATRIX * |
285 |
cm_scale(const CMATRIX *cm1, const COLOR sca) |
286 |
{ |
287 |
CMATRIX *cmr; |
288 |
int dr, dc; |
289 |
|
290 |
cmr = cm_alloc(cm1->nrows, cm1->ncols); |
291 |
if (cmr == NULL) |
292 |
return(NULL); |
293 |
for (dr = 0; dr < cmr->nrows; dr++) |
294 |
for (dc = 0; dc < cmr->ncols; dc++) { |
295 |
const COLORV *sp = cm_lval(cm1,dr,dc); |
296 |
COLORV *dp = cm_lval(cmr,dr,dc); |
297 |
dp[0] = sp[0] * sca[0]; |
298 |
dp[1] = sp[1] * sca[1]; |
299 |
dp[2] = sp[2] * sca[2]; |
300 |
} |
301 |
return(cmr); |
302 |
} |
303 |
|
304 |
/* Multiply two matrices (or a matrix and a vector) and allocate the result */ |
305 |
static CMATRIX * |
306 |
cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2) |
307 |
{ |
308 |
char *rowcheck=NULL, *colcheck=NULL; |
309 |
CMATRIX *cmr; |
310 |
int dr, dc, i; |
311 |
|
312 |
if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows)) |
313 |
error(INTERNAL, "matrix dimension mismatch in cm_multiply()"); |
314 |
cmr = cm_alloc(cm1->nrows, cm2->ncols); |
315 |
if (cmr == NULL) |
316 |
return(NULL); |
317 |
/* optimization: check for zero rows & cols */ |
318 |
if (((cm1->nrows > 5) | (cm2->ncols > 5)) & (cm1->ncols > 5)) { |
319 |
static const COLOR czero; |
320 |
rowcheck = (char *)calloc(cmr->nrows, 1); |
321 |
for (dr = cm1->nrows*(rowcheck != NULL); dr--; ) |
322 |
for (dc = cm1->ncols; dc--; ) |
323 |
if (memcmp(cm_lval(cm1,dr,dc), czero, sizeof(COLOR))) { |
324 |
rowcheck[dr] = 1; |
325 |
break; |
326 |
} |
327 |
colcheck = (char *)calloc(cmr->ncols, 1); |
328 |
for (dc = cm2->ncols*(colcheck != NULL); dc--; ) |
329 |
for (dr = cm2->nrows; dr--; ) |
330 |
if (memcmp(cm_lval(cm2,dr,dc), czero, sizeof(COLOR))) { |
331 |
colcheck[dc] = 1; |
332 |
break; |
333 |
} |
334 |
} |
335 |
for (dr = 0; dr < cmr->nrows; dr++) |
336 |
for (dc = 0; dc < cmr->ncols; dc++) { |
337 |
COLORV *dp = cm_lval(cmr,dr,dc); |
338 |
dp[0] = dp[1] = dp[2] = 0; |
339 |
if (rowcheck != NULL && !rowcheck[dr]) |
340 |
continue; |
341 |
if (colcheck != NULL && !colcheck[dc]) |
342 |
continue; |
343 |
for (i = 0; i < cm1->ncols; i++) { |
344 |
const COLORV *cp1 = cm_lval(cm1,dr,i); |
345 |
const COLORV *cp2 = cm_lval(cm2,i,dc); |
346 |
dp[0] += cp1[0] * cp2[0]; |
347 |
dp[1] += cp1[1] * cp2[1]; |
348 |
dp[2] += cp1[2] * cp2[2]; |
349 |
} |
350 |
} |
351 |
if (rowcheck != NULL) free(rowcheck); |
352 |
if (colcheck != NULL) free(colcheck); |
353 |
return(cmr); |
354 |
} |
355 |
|
356 |
/* print out matrix as ASCII text -- no header */ |
357 |
static void |
358 |
cm_print(const CMATRIX *cm, FILE *fp) |
359 |
{ |
360 |
int r, c; |
361 |
const COLORV *mp = cm->cmem; |
362 |
|
363 |
for (r = 0; r < cm->nrows; r++) { |
364 |
for (c = 0; c < cm->ncols; c++, mp += 3) |
365 |
fprintf(fp, "\t%.6e %.6e %.6e", mp[0], mp[1], mp[2]); |
366 |
fputc('\n', fp); |
367 |
} |
368 |
} |
369 |
|
370 |
/* Convert a BSDF to our matrix representation */ |
371 |
static CMATRIX * |
372 |
cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf) |
373 |
{ |
374 |
CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc); |
375 |
int nbadohm = 0; |
376 |
int nneg = 0; |
377 |
int r, c; |
378 |
/* loop over incident angles */ |
379 |
for (c = 0; c < cm->ncols; c++) { |
380 |
const double dom = mBSDF_incohm(bsdf,c); |
381 |
/* projected solid angle */ |
382 |
nbadohm += (dom <= 0); |
383 |
|
384 |
for (r = 0; r < cm->nrows; r++) { |
385 |
float f = mBSDF_value(bsdf,c,r); |
386 |
COLORV *mp = cm_lval(cm,r,c); |
387 |
/* check BSDF value */ |
388 |
if ((f <= 0) | (dom <= 0)) { |
389 |
nneg += (f < -FTINY); |
390 |
f = .0f; |
391 |
} |
392 |
copycolor(mp, specCol); |
393 |
scalecolor(mp, f); |
394 |
addcolor(mp, bsdfLamb); |
395 |
scalecolor(mp, dom); |
396 |
} |
397 |
} |
398 |
if (nneg | nbadohm) { |
399 |
sprintf(errmsg, |
400 |
"BTDF has %d negatives and %d bad incoming solid angles", |
401 |
nneg, nbadohm); |
402 |
error(WARNING, errmsg); |
403 |
} |
404 |
return(cm); |
405 |
} |
406 |
|
407 |
/* Convert between input and output indices for reciprocity */ |
408 |
static int |
409 |
recip_out_from_in(const SDMat *bsdf, int in_recip) |
410 |
{ |
411 |
FVECT v; |
412 |
|
413 |
if (!mBSDF_incvec(v, bsdf, in_recip+.5)) |
414 |
return(in_recip); /* XXX should be error! */ |
415 |
v[2] = -v[2]; |
416 |
return(mBSDF_outndx(bsdf, v)); |
417 |
} |
418 |
|
419 |
/* Convert between output and input indices for reciprocity */ |
420 |
static int |
421 |
recip_in_from_out(const SDMat *bsdf, int out_recip) |
422 |
{ |
423 |
FVECT v; |
424 |
|
425 |
if (!mBSDF_outvec(v, bsdf, out_recip+.5)) |
426 |
return(out_recip); /* XXX should be error! */ |
427 |
v[2] = -v[2]; |
428 |
return(mBSDF_incndx(bsdf, v)); |
429 |
} |
430 |
|
431 |
/* Convert a BSDF to our matrix representation, applying reciprocity */ |
432 |
static CMATRIX * |
433 |
cm_bsdf_recip(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf) |
434 |
{ |
435 |
CMATRIX *cm = cm_alloc(bsdf->ninc, bsdf->nout); |
436 |
int nbadohm = 0; |
437 |
int nneg = 0; |
438 |
int r, c; |
439 |
/* loop over incident angles */ |
440 |
for (c = 0; c < cm->ncols; c++) { |
441 |
const int ro = recip_out_from_in(bsdf,c); |
442 |
const double dom = mBSDF_outohm(bsdf,ro); |
443 |
/* projected solid angle */ |
444 |
nbadohm += (dom <= 0); |
445 |
|
446 |
for (r = 0; r < cm->nrows; r++) { |
447 |
const int ri = recip_in_from_out(bsdf,r); |
448 |
float f = mBSDF_value(bsdf,ri,ro); |
449 |
COLORV *mp = cm_lval(cm,r,c); |
450 |
/* check BSDF value */ |
451 |
if ((f <= 0) | (dom <= 0)) { |
452 |
nneg += (f < -FTINY); |
453 |
f = .0f; |
454 |
} |
455 |
copycolor(mp, specCol); |
456 |
scalecolor(mp, f); |
457 |
addcolor(mp, bsdfLamb); |
458 |
scalecolor(mp, dom); |
459 |
} |
460 |
} |
461 |
if (nneg | nbadohm) { |
462 |
sprintf(errmsg, |
463 |
"BTDF has %d negatives and %d bad incoming solid angles", |
464 |
nneg, nbadohm); |
465 |
error(WARNING, errmsg); |
466 |
} |
467 |
return(cm); |
468 |
} |
469 |
|
470 |
/* Load and convert a matrix BSDF from the given XML file */ |
471 |
static CMATRIX * |
472 |
cm_loadBSDF(char *fname, COLOR cLamb) |
473 |
{ |
474 |
CMATRIX *Tmat; |
475 |
char *fpath; |
476 |
int recip; |
477 |
SDError ec; |
478 |
SDData myBSDF; |
479 |
SDSpectralDF *tdf; |
480 |
COLOR bsdfLamb, specCol; |
481 |
/* find path to BSDF file */ |
482 |
fpath = getpath(fname, getrlibpath(), R_OK); |
483 |
if (fpath == NULL) { |
484 |
sprintf(errmsg, "cannot find BSDF file '%s'", fname); |
485 |
error(USER, errmsg); |
486 |
} |
487 |
SDclearBSDF(&myBSDF, fname); /* load XML and check type */ |
488 |
ec = SDloadFile(&myBSDF, fpath); |
489 |
if (ec) |
490 |
error(USER, transSDError(ec)); |
491 |
ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb); |
492 |
recip = (myBSDF.tb == NULL); |
493 |
tdf = recip ? myBSDF.tf : myBSDF.tb; |
494 |
if (tdf == NULL) { /* no non-Lambertian transmission? */ |
495 |
if (cLamb != NULL) |
496 |
copycolor(cLamb, bsdfLamb); |
497 |
SDfreeBSDF(&myBSDF); |
498 |
return(NULL); |
499 |
} |
500 |
if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) { |
501 |
sprintf(errmsg, "unsupported BSDF '%s'", fpath); |
502 |
error(USER, errmsg); |
503 |
} |
504 |
/* convert BTDF to matrix */ |
505 |
ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol); |
506 |
Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist) |
507 |
: cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist); |
508 |
if (cLamb != NULL) /* Lambertian is included */ |
509 |
setcolor(cLamb, .0, .0, .0); |
510 |
/* free BSDF and return */ |
511 |
SDfreeBSDF(&myBSDF); |
512 |
return(Tmat); |
513 |
} |
514 |
|
515 |
/* Sum together a set of images and write result to fout */ |
516 |
static int |
517 |
sum_images(const char *fspec, const CMATRIX *cv, FILE *fout) |
518 |
{ |
519 |
int myDT = DTfromHeader; |
520 |
COLOR *scanline = NULL; |
521 |
CMATRIX *pmat = NULL; |
522 |
int myXR=0, myYR=0; |
523 |
int i, y; |
524 |
|
525 |
if (cv->ncols != 1) |
526 |
error(INTERNAL, "expected vector in sum_images()"); |
527 |
for (i = 0; i < cv->nrows; i++) { |
528 |
const COLORV *scv = cv_lval(cv,i); |
529 |
char fname[1024]; |
530 |
FILE *fp; |
531 |
int dt, xr, yr; |
532 |
COLORV *psp; |
533 |
/* check for zero */ |
534 |
if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) && |
535 |
(myDT != DTfromHeader) | (i < cv->nrows-1)) |
536 |
continue; |
537 |
/* open next picture */ |
538 |
sprintf(fname, fspec, i); |
539 |
if ((fp = fopen(fname, "r")) == NULL) { |
540 |
sprintf(errmsg, "cannot open picture '%s'", fname); |
541 |
error(SYSTEM, errmsg); |
542 |
} |
543 |
SET_FILE_BINARY(fp); |
544 |
dt = getDTfromHeader(fp); |
545 |
if ((dt != DTrgbe) & (dt != DTxyze) || |
546 |
!fscnresolu(&xr, &yr, fp)) { |
547 |
sprintf(errmsg, "file '%s' not a picture", fname); |
548 |
error(USER, errmsg); |
549 |
} |
550 |
if (myDT == DTfromHeader) { /* on first one */ |
551 |
myDT = dt; |
552 |
myXR = xr; myYR = yr; |
553 |
scanline = (COLOR *)malloc(sizeof(COLOR)*myXR); |
554 |
if (scanline == NULL) |
555 |
error(SYSTEM, "out of memory in sum_images()"); |
556 |
pmat = cm_alloc(myYR, myXR); |
557 |
memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR); |
558 |
/* finish header */ |
559 |
fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout); |
560 |
fputc('\n', fout); |
561 |
fprtresolu(myXR, myYR, fout); |
562 |
fflush(fout); |
563 |
} else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) { |
564 |
sprintf(errmsg, "picture '%s' format/size mismatch", |
565 |
fname); |
566 |
error(USER, errmsg); |
567 |
} |
568 |
psp = pmat->cmem; |
569 |
for (y = 0; y < yr; y++) { /* read it in */ |
570 |
int x; |
571 |
if (freadscan(scanline, xr, fp) < 0) { |
572 |
sprintf(errmsg, "error reading picture '%s'", |
573 |
fname); |
574 |
error(SYSTEM, errmsg); |
575 |
} |
576 |
/* sum in scanline */ |
577 |
for (x = 0; x < xr; x++, psp += 3) { |
578 |
multcolor(scanline[x], scv); |
579 |
addcolor(psp, scanline[x]); |
580 |
} |
581 |
} |
582 |
fclose(fp); /* done this picture */ |
583 |
} |
584 |
free(scanline); |
585 |
/* write scanlines */ |
586 |
for (y = 0; y < myYR; y++) |
587 |
if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0) |
588 |
return(0); |
589 |
cm_free(pmat); /* all done */ |
590 |
return(fflush(fout) == 0); |
591 |
} |
592 |
|
593 |
/* check to see if a string contains a %d or %o specification */ |
594 |
static int |
595 |
hasNumberFormat(const char *s) |
596 |
{ |
597 |
if (s == NULL) |
598 |
return(0); |
599 |
|
600 |
while (*s) { |
601 |
while (*s != '%') |
602 |
if (!*s++) |
603 |
return(0); |
604 |
if (*++s == '%') { /* ignore "%%" */ |
605 |
++s; |
606 |
continue; |
607 |
} |
608 |
while (isdigit(*s)) /* field length */ |
609 |
++s; |
610 |
/* field we'll use? */ |
611 |
if ((*s == 'd') | (*s == 'i') | (*s == 'o') | |
612 |
(*s == 'x') | (*s == 'X')) |
613 |
return(1); |
614 |
} |
615 |
return(0); /* didn't find one */ |
616 |
} |
617 |
|
618 |
int |
619 |
main(int argc, char *argv[]) |
620 |
{ |
621 |
int skyfmt = DTascii; |
622 |
int nsteps = 1; |
623 |
char *ofspec = NULL; |
624 |
FILE *ofp = stdout; |
625 |
CMATRIX *cmtx; /* component vector/matrix result */ |
626 |
char fnbuf[256]; |
627 |
int a, i; |
628 |
|
629 |
progname = argv[0]; |
630 |
/* get options */ |
631 |
for (a = 1; a < argc && argv[a][0] == '-'; a++) |
632 |
switch (argv[a][1]) { |
633 |
case 'n': |
634 |
nsteps = atoi(argv[++a]); |
635 |
if (nsteps <= 0) |
636 |
goto userr; |
637 |
break; |
638 |
case 'o': |
639 |
ofspec = argv[++a]; |
640 |
break; |
641 |
case 'i': |
642 |
switch (argv[a][2]) { |
643 |
case 'f': |
644 |
skyfmt = DTfloat; |
645 |
break; |
646 |
case 'd': |
647 |
skyfmt = DTdouble; |
648 |
break; |
649 |
case 'a': |
650 |
skyfmt = DTascii; |
651 |
break; |
652 |
default: |
653 |
goto userr; |
654 |
} |
655 |
break; |
656 |
default: |
657 |
goto userr; |
658 |
} |
659 |
if ((argc-a < 1) | (argc-a > 4)) |
660 |
goto userr; |
661 |
|
662 |
if (argc-a > 2) { /* VTDs expression */ |
663 |
CMATRIX *smtx, *Dmat, *Tmat, *imtx; |
664 |
COLOR tLamb; |
665 |
/* get sky vector/matrix */ |
666 |
smtx = cm_load(argv[a+3], 0, nsteps, skyfmt); |
667 |
/* load BSDF */ |
668 |
Tmat = cm_loadBSDF(argv[a+1], tLamb); |
669 |
/* load Daylight matrix */ |
670 |
Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols, |
671 |
smtx->nrows, DTfromHeader); |
672 |
/* multiply vector through */ |
673 |
imtx = cm_multiply(Dmat, smtx); |
674 |
cm_free(Dmat); cm_free(smtx); |
675 |
if (Tmat == NULL) { /* diffuse only */ |
676 |
cmtx = cm_scale(imtx, tLamb); |
677 |
} else { /* else apply BTDF matrix */ |
678 |
cmtx = cm_multiply(Tmat, imtx); |
679 |
cm_free(Tmat); |
680 |
} |
681 |
cm_free(imtx); |
682 |
} else { /* sky vector/matrix only */ |
683 |
cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt); |
684 |
} |
685 |
/* prepare output stream */ |
686 |
if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) { |
687 |
sprintf(fnbuf, ofspec, 1); |
688 |
ofspec = fnbuf; |
689 |
} |
690 |
if (ofspec != NULL && !hasNumberFormat(ofspec)) { |
691 |
if ((ofp = fopen(ofspec, "w")) == NULL) { |
692 |
fprintf(stderr, "%s: cannot open '%s' for output\n", |
693 |
progname, ofspec); |
694 |
return(1); |
695 |
} |
696 |
ofspec = NULL; /* only need to open once */ |
697 |
} |
698 |
if (hasNumberFormat(argv[a])) { /* generating image(s) */ |
699 |
if (ofspec == NULL) { |
700 |
SET_FILE_BINARY(ofp); |
701 |
newheader("RADIANCE", ofp); |
702 |
printargs(argc, argv, ofp); |
703 |
fputnow(ofp); |
704 |
} |
705 |
if (nsteps > 1) /* multiple output frames? */ |
706 |
for (i = 0; i < nsteps; i++) { |
707 |
CMATRIX *cvec = cm_column(cmtx, i); |
708 |
if (ofspec != NULL) { |
709 |
sprintf(fnbuf, ofspec, i+1); |
710 |
if ((ofp = fopen(fnbuf, "wb")) == NULL) { |
711 |
fprintf(stderr, |
712 |
"%s: cannot open '%s' for output\n", |
713 |
progname, fnbuf); |
714 |
return(1); |
715 |
} |
716 |
newheader("RADIANCE", ofp); |
717 |
printargs(argc, argv, ofp); |
718 |
fputnow(ofp); |
719 |
} |
720 |
fprintf(ofp, "FRAME=%d\n", i+1); |
721 |
if (!sum_images(argv[a], cvec, ofp)) |
722 |
return(1); |
723 |
if (ofspec != NULL) { |
724 |
if (fclose(ofp) == EOF) { |
725 |
fprintf(stderr, |
726 |
"%s: error writing to '%s'\n", |
727 |
progname, fnbuf); |
728 |
return(1); |
729 |
} |
730 |
ofp = stdout; |
731 |
} |
732 |
cm_free(cvec); |
733 |
} |
734 |
else if (!sum_images(argv[a], cmtx, ofp)) |
735 |
return(1); |
736 |
} else { /* generating vector/matrix */ |
737 |
CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader); |
738 |
CMATRIX *rmtx = cm_multiply(Vmat, cmtx); |
739 |
cm_free(Vmat); |
740 |
if (ofspec != NULL) /* multiple vector files? */ |
741 |
for (i = 0; i < nsteps; i++) { |
742 |
CMATRIX *rvec = cm_column(rmtx, i); |
743 |
sprintf(fnbuf, ofspec, i+1); |
744 |
if ((ofp = fopen(fnbuf, "w")) == NULL) { |
745 |
fprintf(stderr, |
746 |
"%s: cannot open '%s' for output\n", |
747 |
progname, fnbuf); |
748 |
return(1); |
749 |
} |
750 |
cm_print(rvec, ofp); |
751 |
if (fclose(ofp) == EOF) { |
752 |
fprintf(stderr, |
753 |
"%s: error writing to '%s'\n", |
754 |
progname, fnbuf); |
755 |
return(1); |
756 |
} |
757 |
ofp = stdout; |
758 |
cm_free(rvec); |
759 |
} |
760 |
else |
761 |
cm_print(rmtx, ofp); |
762 |
cm_free(rmtx); |
763 |
} |
764 |
if (fflush(ofp) == EOF) { /* final clean-up */ |
765 |
fprintf(stderr, "%s: write error on output\n", progname); |
766 |
return(1); |
767 |
} |
768 |
cm_free(cmtx); |
769 |
return(0); |
770 |
userr: |
771 |
fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d}] DCspec [skyf]\n", |
772 |
progname); |
773 |
fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d}] Vspec Tbsdf.xml Dmat.dat [skyf]\n", |
774 |
progname); |
775 |
return(1); |
776 |
} |