1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.16 2015/07/22 04:29:56 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* General matrix operations. |
6 |
*/ |
7 |
|
8 |
#include <stdio.h> |
9 |
#include <stdlib.h> |
10 |
#include <string.h> |
11 |
#include <fcntl.h> |
12 |
#include "resolu.h" |
13 |
#include "rtprocess.h" |
14 |
#include "rmatrix.h" |
15 |
|
16 |
static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n"; |
17 |
|
18 |
/* Allocate a nr x nc matrix with n components */ |
19 |
RMATRIX * |
20 |
rmx_alloc(int nr, int nc, int n) |
21 |
{ |
22 |
RMATRIX *dnew; |
23 |
|
24 |
if ((nr <= 0) | (nc <= 0) | (n <= 0)) |
25 |
return(NULL); |
26 |
dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) + |
27 |
sizeof(dnew->mtx[0])*(n*nr*nc)); |
28 |
if (dnew == NULL) |
29 |
return(NULL); |
30 |
dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n; |
31 |
dnew->dtype = DTdouble; |
32 |
dnew->info = NULL; |
33 |
return(dnew); |
34 |
} |
35 |
|
36 |
/* Free a RMATRIX array */ |
37 |
void |
38 |
rmx_free(RMATRIX *rm) |
39 |
{ |
40 |
if (!rm) return; |
41 |
if (rm->info) |
42 |
free(rm->info); |
43 |
free(rm); |
44 |
} |
45 |
|
46 |
/* Resolve data type based on two input types (returns 0 for mismatch) */ |
47 |
int |
48 |
rmx_newtype(int dtyp1, int dtyp2) |
49 |
{ |
50 |
if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) | |
51 |
(dtyp2==DTxyze) | (dtyp2==DTrgbe) |
52 |
&& dtyp1 != dtyp2) |
53 |
return(0); |
54 |
if (dtyp1 < dtyp2) |
55 |
return(dtyp1); |
56 |
return(dtyp2); |
57 |
} |
58 |
|
59 |
/* Append header information associated with matrix data */ |
60 |
int |
61 |
rmx_addinfo(RMATRIX *rm, const char *info) |
62 |
{ |
63 |
if (!info || !*info) |
64 |
return(0); |
65 |
if (!rm->info) { |
66 |
rm->info = (char *)malloc(strlen(info)+1); |
67 |
if (rm->info) rm->info[0] = '\0'; |
68 |
} else |
69 |
rm->info = (char *)realloc(rm->info, |
70 |
strlen(rm->info)+strlen(info)+1); |
71 |
if (!rm->info) |
72 |
return(0); |
73 |
strcat(rm->info, info); |
74 |
return(1); |
75 |
} |
76 |
|
77 |
static int |
78 |
get_dminfo(char *s, void *p) |
79 |
{ |
80 |
RMATRIX *ip = (RMATRIX *)p; |
81 |
char fmt[64]; |
82 |
int i; |
83 |
|
84 |
if (headidval(fmt, s)) |
85 |
return(0); |
86 |
if (!strncmp(s, "NCOMP=", 6)) { |
87 |
ip->ncomp = atoi(s+6); |
88 |
return(0); |
89 |
} |
90 |
if (!strncmp(s, "NROWS=", 6)) { |
91 |
ip->nrows = atoi(s+6); |
92 |
return(0); |
93 |
} |
94 |
if (!strncmp(s, "NCOLS=", 6)) { |
95 |
ip->ncols = atoi(s+6); |
96 |
return(0); |
97 |
} |
98 |
if (!formatval(fmt, s)) { |
99 |
rmx_addinfo(ip, s); |
100 |
return(0); |
101 |
} |
102 |
for (i = 1; i < DTend; i++) |
103 |
if (!strcmp(fmt, cm_fmt_id[i])) { |
104 |
ip->dtype = i; |
105 |
return(0); |
106 |
} |
107 |
return(-1); |
108 |
} |
109 |
|
110 |
static int |
111 |
rmx_load_ascii(RMATRIX *rm, FILE *fp) |
112 |
{ |
113 |
int i, j, k; |
114 |
|
115 |
for (i = 0; i < rm->nrows; i++) |
116 |
for (j = 0; j < rm->ncols; j++) |
117 |
for (k = 0; k < rm->ncomp; k++) |
118 |
if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
119 |
return(0); |
120 |
return(1); |
121 |
} |
122 |
|
123 |
static int |
124 |
rmx_load_float(RMATRIX *rm, FILE *fp) |
125 |
{ |
126 |
int i, j, k; |
127 |
float val[100]; |
128 |
|
129 |
if (rm->ncomp > 100) { |
130 |
fputs("Unsupported # components in rmx_load_float()\n", stderr); |
131 |
exit(1); |
132 |
} |
133 |
for (i = 0; i < rm->nrows; i++) |
134 |
for (j = 0; j < rm->ncols; j++) { |
135 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
136 |
return(0); |
137 |
for (k = rm->ncomp; k--; ) |
138 |
rmx_lval(rm,i,j,k) = val[k]; |
139 |
} |
140 |
return(1); |
141 |
} |
142 |
|
143 |
static int |
144 |
rmx_load_double(RMATRIX *rm, FILE *fp) |
145 |
{ |
146 |
int i, j, k; |
147 |
double val[100]; |
148 |
|
149 |
if (rm->ncomp > 100) { |
150 |
fputs("Unsupported # components in rmx_load_double()\n", stderr); |
151 |
exit(1); |
152 |
} |
153 |
for (i = 0; i < rm->nrows; i++) |
154 |
for (j = 0; j < rm->ncols; j++) { |
155 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
156 |
return(0); |
157 |
for (k = rm->ncomp; k--; ) |
158 |
rmx_lval(rm,i,j,k) = val[k]; |
159 |
} |
160 |
return(1); |
161 |
} |
162 |
|
163 |
static int |
164 |
rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
165 |
{ |
166 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
167 |
int i, j; |
168 |
|
169 |
if (scan == NULL) |
170 |
return(0); |
171 |
for (i = 0; i < rm->nrows; i++) { |
172 |
if (freadscan(scan, rm->ncols, fp) < 0) { |
173 |
free(scan); |
174 |
return(0); |
175 |
} |
176 |
for (j = rm->ncols; j--; ) { |
177 |
rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
178 |
rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
179 |
rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
180 |
} |
181 |
} |
182 |
free(scan); |
183 |
return(1); |
184 |
} |
185 |
|
186 |
/* Load matrix from supported file type */ |
187 |
RMATRIX * |
188 |
rmx_load(const char *inspec) |
189 |
{ |
190 |
FILE *fp = stdin; |
191 |
RMATRIX dinfo; |
192 |
RMATRIX *dnew; |
193 |
|
194 |
if (inspec == NULL) { /* reading from stdin? */ |
195 |
inspec = "<stdin>"; |
196 |
#ifdef _WIN32 |
197 |
_setmode(fileno(stdin), _O_BINARY); |
198 |
#endif |
199 |
} else if (inspec[0] == '!') { |
200 |
if ((fp = popen(inspec+1, "r")) == NULL) |
201 |
return(NULL); |
202 |
#ifdef _WIN32 |
203 |
_setmode(fileno(fp), _O_BINARY); |
204 |
#endif |
205 |
} else { |
206 |
const char *sp = inspec; /* check suffix */ |
207 |
while (*sp) |
208 |
++sp; |
209 |
while (sp > inspec && sp[-1] != '.') |
210 |
--sp; |
211 |
if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
212 |
CMATRIX *cm = cm_loadBTDF((char *)inspec); |
213 |
if (cm == NULL) |
214 |
return(NULL); |
215 |
dnew = rmx_from_cmatrix(cm); |
216 |
cm_free(cm); |
217 |
return(dnew); |
218 |
} |
219 |
/* else open it ourselves */ |
220 |
if ((fp = fopen(inspec, "rb")) == NULL) |
221 |
return(NULL); |
222 |
} |
223 |
#ifdef getc_unlocked |
224 |
flockfile(fp); |
225 |
#endif |
226 |
dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0; |
227 |
dinfo.dtype = DTascii; /* assumed w/o FORMAT */ |
228 |
dinfo.info = NULL; |
229 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
230 |
fclose(fp); |
231 |
return(NULL); |
232 |
} |
233 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
234 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
235 |
fclose(fp); |
236 |
return(NULL); |
237 |
} |
238 |
if (dinfo.ncomp <= 0) |
239 |
dinfo.ncomp = 3; |
240 |
else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
241 |
dinfo.ncomp != 3) { |
242 |
fclose(fp); |
243 |
return(NULL); |
244 |
} |
245 |
} |
246 |
dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
247 |
if (dnew == NULL) { |
248 |
fclose(fp); |
249 |
return(NULL); |
250 |
} |
251 |
dnew->info = dinfo.info; |
252 |
switch (dinfo.dtype) { |
253 |
case DTascii: |
254 |
#ifdef _WIN32 |
255 |
_setmode(fileno(fp), _O_TEXT); |
256 |
#endif |
257 |
if (!rmx_load_ascii(dnew, fp)) |
258 |
goto loaderr; |
259 |
dnew->dtype = DTascii; /* should leave double? */ |
260 |
break; |
261 |
case DTfloat: |
262 |
if (!rmx_load_float(dnew, fp)) |
263 |
goto loaderr; |
264 |
dnew->dtype = DTfloat; |
265 |
break; |
266 |
case DTdouble: |
267 |
if (!rmx_load_double(dnew, fp)) |
268 |
goto loaderr; |
269 |
dnew->dtype = DTdouble; |
270 |
break; |
271 |
case DTrgbe: |
272 |
case DTxyze: |
273 |
if (!rmx_load_rgbe(dnew, fp)) |
274 |
goto loaderr; |
275 |
dnew->dtype = dinfo.dtype; |
276 |
break; |
277 |
default: |
278 |
goto loaderr; |
279 |
} |
280 |
if (fp != stdin) { |
281 |
if (inspec[0] == '!') |
282 |
pclose(fp); |
283 |
else |
284 |
fclose(fp); |
285 |
} |
286 |
#ifdef getc_unlocked |
287 |
else |
288 |
funlockfile(fp); |
289 |
#endif |
290 |
return(dnew); |
291 |
loaderr: /* should report error? */ |
292 |
if (inspec[0] == '!') |
293 |
pclose(fp); |
294 |
else |
295 |
fclose(fp); |
296 |
rmx_free(dnew); |
297 |
return(NULL); |
298 |
} |
299 |
|
300 |
static int |
301 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
302 |
{ |
303 |
int i, j, k; |
304 |
|
305 |
for (i = 0; i < rm->nrows; i++) { |
306 |
for (j = 0; j < rm->ncols; j++) { |
307 |
for (k = 0; k < rm->ncomp; k++) |
308 |
fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
309 |
fputc('\t', fp); |
310 |
} |
311 |
fputc('\n', fp); |
312 |
} |
313 |
return(1); |
314 |
} |
315 |
|
316 |
static int |
317 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
318 |
{ |
319 |
int i, j, k; |
320 |
float val[100]; |
321 |
|
322 |
if (rm->ncomp > 100) { |
323 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
324 |
exit(1); |
325 |
} |
326 |
for (i = 0; i < rm->nrows; i++) |
327 |
for (j = 0; j < rm->ncols; j++) { |
328 |
for (k = rm->ncomp; k--; ) |
329 |
val[k] = (float)rmx_lval(rm,i,j,k); |
330 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
331 |
return(0); |
332 |
} |
333 |
return(1); |
334 |
} |
335 |
|
336 |
static int |
337 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
338 |
{ |
339 |
int i, j, k; |
340 |
double val[100]; |
341 |
|
342 |
if (rm->ncomp > 100) { |
343 |
fputs("Unsupported # components in rmx_write_double()\n", stderr); |
344 |
exit(1); |
345 |
} |
346 |
for (i = 0; i < rm->nrows; i++) |
347 |
for (j = 0; j < rm->ncols; j++) { |
348 |
for (k = rm->ncomp; k--; ) |
349 |
val[k] = rmx_lval(rm,i,j,k); |
350 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
351 |
return(0); |
352 |
} |
353 |
return(1); |
354 |
} |
355 |
|
356 |
static int |
357 |
rmx_write_rgbe(const RMATRIX *rm, FILE *fp) |
358 |
{ |
359 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
360 |
int i, j; |
361 |
|
362 |
if (scan == NULL) |
363 |
return(0); |
364 |
for (i = 0; i < rm->nrows; i++) { |
365 |
for (j = rm->ncols; j--; ) |
366 |
setcolor(scan[j], rmx_lval(rm,i,j,0), |
367 |
rmx_lval(rm,i,j,1), |
368 |
rmx_lval(rm,i,j,2) ); |
369 |
if (fwritescan(scan, rm->ncols, fp) < 0) { |
370 |
free(scan); |
371 |
return(0); |
372 |
} |
373 |
} |
374 |
free(scan); |
375 |
return(1); |
376 |
} |
377 |
|
378 |
/* Write matrix to file type indicated by dtype */ |
379 |
int |
380 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
381 |
{ |
382 |
RMATRIX *mydm = NULL; |
383 |
int ok = 1; |
384 |
|
385 |
if ((rm == NULL) | (fp == NULL)) |
386 |
return(0); |
387 |
#ifdef getc_unlocked |
388 |
flockfile(fp); |
389 |
#endif |
390 |
/* complete header */ |
391 |
if (rm->info) |
392 |
fputs(rm->info, fp); |
393 |
if (dtype == DTfromHeader) |
394 |
dtype = rm->dtype; |
395 |
else if ((dtype == DTrgbe) & (rm->dtype == DTxyze)) |
396 |
dtype = DTxyze; |
397 |
else if ((dtype == DTxyze) & (rm->dtype == DTrgbe)) |
398 |
dtype = DTrgbe; |
399 |
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
400 |
fprintf(fp, "NROWS=%d\n", rm->nrows); |
401 |
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
402 |
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
403 |
} else if (rm->ncomp != 3) { /* wrong # components? */ |
404 |
double cmtx[3]; |
405 |
if (rm->ncomp != 1) /* only convert grayscale */ |
406 |
return(0); |
407 |
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
408 |
mydm = rmx_transform(rm, 3, cmtx); |
409 |
if (mydm == NULL) |
410 |
return(0); |
411 |
rm = mydm; |
412 |
} |
413 |
fputformat((char *)cm_fmt_id[dtype], fp); |
414 |
fputc('\n', fp); |
415 |
switch (dtype) { /* write data */ |
416 |
case DTascii: |
417 |
ok = rmx_write_ascii(rm, fp); |
418 |
break; |
419 |
case DTfloat: |
420 |
ok = rmx_write_float(rm, fp); |
421 |
break; |
422 |
case DTdouble: |
423 |
ok = rmx_write_double(rm, fp); |
424 |
break; |
425 |
case DTrgbe: |
426 |
case DTxyze: |
427 |
fprtresolu(rm->ncols, rm->nrows, fp); |
428 |
ok = rmx_write_rgbe(rm, fp); |
429 |
break; |
430 |
default: |
431 |
return(0); |
432 |
} |
433 |
ok &= (fflush(fp) == 0); |
434 |
#ifdef getc_unlocked |
435 |
funlockfile(fp); |
436 |
#endif |
437 |
rmx_free(mydm); |
438 |
return(ok); |
439 |
} |
440 |
|
441 |
/* Allocate and assign square identity matrix with n components */ |
442 |
RMATRIX * |
443 |
rmx_identity(const int dim, const int n) |
444 |
{ |
445 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
446 |
int i, k; |
447 |
|
448 |
if (rid == NULL) |
449 |
return(NULL); |
450 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim); |
451 |
for (i = dim; i--; ) |
452 |
for (k = n; k--; ) |
453 |
rmx_lval(rid,i,i,k) = 1; |
454 |
return(rid); |
455 |
} |
456 |
|
457 |
/* Duplicate the given matrix */ |
458 |
RMATRIX * |
459 |
rmx_copy(const RMATRIX *rm) |
460 |
{ |
461 |
RMATRIX *dnew; |
462 |
|
463 |
if (rm == NULL) |
464 |
return(NULL); |
465 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
466 |
if (dnew == NULL) |
467 |
return(NULL); |
468 |
rmx_addinfo(dnew, rm->info); |
469 |
dnew->dtype = rm->dtype; |
470 |
memcpy(dnew->mtx, rm->mtx, |
471 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
472 |
return(dnew); |
473 |
} |
474 |
|
475 |
/* Allocate and assign transposed matrix */ |
476 |
RMATRIX * |
477 |
rmx_transpose(const RMATRIX *rm) |
478 |
{ |
479 |
RMATRIX *dnew; |
480 |
int i, j, k; |
481 |
|
482 |
if (rm == NULL) |
483 |
return(0); |
484 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
485 |
if (dnew == NULL) |
486 |
return(NULL); |
487 |
if (rm->info) { |
488 |
rmx_addinfo(dnew, rm->info); |
489 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
490 |
} |
491 |
dnew->dtype = rm->dtype; |
492 |
for (i = dnew->nrows; i--; ) |
493 |
for (j = dnew->ncols; j--; ) |
494 |
for (k = dnew->ncomp; k--; ) |
495 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
496 |
return(dnew); |
497 |
} |
498 |
|
499 |
/* Multiply (concatenate) two matrices and allocate the result */ |
500 |
RMATRIX * |
501 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
502 |
{ |
503 |
RMATRIX *mres; |
504 |
int i, j, k, h; |
505 |
|
506 |
if ((m1 == NULL) | (m2 == NULL) || |
507 |
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
508 |
return(NULL); |
509 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
510 |
if (mres == NULL) |
511 |
return(NULL); |
512 |
i = rmx_newtype(m1->dtype, m2->dtype); |
513 |
if (i) |
514 |
mres->dtype = i; |
515 |
else |
516 |
rmx_addinfo(mres, rmx_mismatch_warn); |
517 |
for (i = mres->nrows; i--; ) |
518 |
for (j = mres->ncols; j--; ) |
519 |
for (k = mres->ncomp; k--; ) { |
520 |
long double d = 0; |
521 |
for (h = m1->ncols; h--; ) |
522 |
d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k); |
523 |
rmx_lval(mres,i,j,k) = (double)d; |
524 |
} |
525 |
return(mres); |
526 |
} |
527 |
|
528 |
/* Sum second matrix into first, applying scale factor beforehand */ |
529 |
int |
530 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
531 |
{ |
532 |
double *mysf = NULL; |
533 |
int i, j, k; |
534 |
|
535 |
if ((msum == NULL) | (madd == NULL) || |
536 |
(msum->nrows != madd->nrows) | |
537 |
(msum->ncols != madd->ncols) | |
538 |
(msum->ncomp != madd->ncomp)) |
539 |
return(0); |
540 |
if (sf == NULL) { |
541 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
542 |
if (mysf == NULL) |
543 |
return(0); |
544 |
for (k = msum->ncomp; k--; ) |
545 |
mysf[k] = 1; |
546 |
sf = mysf; |
547 |
} |
548 |
i = rmx_newtype(msum->dtype, madd->dtype); |
549 |
if (i) |
550 |
msum->dtype = i; |
551 |
else |
552 |
rmx_addinfo(msum, rmx_mismatch_warn); |
553 |
for (i = msum->nrows; i--; ) |
554 |
for (j = msum->ncols; j--; ) |
555 |
for (k = msum->ncomp; k--; ) |
556 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
557 |
|
558 |
free(mysf); |
559 |
return(1); |
560 |
} |
561 |
|
562 |
/* Scale the given matrix by the indicated scalar component vector */ |
563 |
int |
564 |
rmx_scale(RMATRIX *rm, const double sf[]) |
565 |
{ |
566 |
int i, j, k; |
567 |
|
568 |
if ((rm == NULL) | (sf == NULL)) |
569 |
return(0); |
570 |
for (i = rm->nrows; i--; ) |
571 |
for (j = rm->ncols; j--; ) |
572 |
for (k = rm->ncomp; k--; ) |
573 |
rmx_lval(rm,i,j,k) *= sf[k]; |
574 |
|
575 |
return(1); |
576 |
} |
577 |
|
578 |
/* Allocate new matrix and apply component transformation */ |
579 |
RMATRIX * |
580 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
581 |
{ |
582 |
int i, j, ks, kd; |
583 |
RMATRIX *dnew; |
584 |
|
585 |
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
586 |
return(NULL); |
587 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
588 |
if (dnew == NULL) |
589 |
return(NULL); |
590 |
dnew->dtype = msrc->dtype; |
591 |
for (i = dnew->nrows; i--; ) |
592 |
for (j = dnew->ncols; j--; ) |
593 |
for (kd = dnew->ncomp; kd--; ) { |
594 |
double d = 0; |
595 |
for (ks = msrc->ncomp; ks--; ) |
596 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
597 |
rmx_lval(dnew,i,j,kd) = d; |
598 |
} |
599 |
return(dnew); |
600 |
} |
601 |
|
602 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
603 |
RMATRIX * |
604 |
rmx_from_cmatrix(const CMATRIX *cm) |
605 |
{ |
606 |
int i, j; |
607 |
RMATRIX *dnew; |
608 |
|
609 |
if (cm == NULL) |
610 |
return(NULL); |
611 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
612 |
if (dnew == NULL) |
613 |
return(NULL); |
614 |
dnew->dtype = DTfloat; |
615 |
for (i = dnew->nrows; i--; ) |
616 |
for (j = dnew->ncols; j--; ) { |
617 |
const COLORV *cv = cm_lval(cm,i,j); |
618 |
rmx_lval(dnew,i,j,0) = cv[0]; |
619 |
rmx_lval(dnew,i,j,1) = cv[1]; |
620 |
rmx_lval(dnew,i,j,2) = cv[2]; |
621 |
} |
622 |
return(dnew); |
623 |
} |
624 |
|
625 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
626 |
CMATRIX * |
627 |
cm_from_rmatrix(const RMATRIX *rm) |
628 |
{ |
629 |
int i, j; |
630 |
CMATRIX *cnew; |
631 |
|
632 |
if (rm == NULL || rm->ncomp != 3) |
633 |
return(NULL); |
634 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
635 |
if (cnew == NULL) |
636 |
return(NULL); |
637 |
for (i = cnew->nrows; i--; ) |
638 |
for (j = cnew->ncols; j--; ) { |
639 |
COLORV *cv = cm_lval(cnew,i,j); |
640 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
641 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
642 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
643 |
} |
644 |
return(cnew); |
645 |
} |