1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.14 2015/05/04 23:27:04 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 |
#ifdef _WIN32 |
115 |
_setmode(fileno(fp), _O_TEXT); |
116 |
#endif |
117 |
for (i = 0; i < rm->nrows; i++) |
118 |
for (j = 0; j < rm->ncols; j++) |
119 |
for (k = 0; k < rm->ncomp; k++) |
120 |
if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
121 |
return(0); |
122 |
return(1); |
123 |
} |
124 |
|
125 |
static int |
126 |
rmx_load_float(RMATRIX *rm, FILE *fp) |
127 |
{ |
128 |
int i, j, k; |
129 |
float val[100]; |
130 |
|
131 |
if (rm->ncomp > 100) { |
132 |
fputs("Unsupported # components in rmx_load_float()\n", stderr); |
133 |
exit(1); |
134 |
} |
135 |
for (i = 0; i < rm->nrows; i++) |
136 |
for (j = 0; j < rm->ncols; j++) { |
137 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
138 |
return(0); |
139 |
for (k = rm->ncomp; k--; ) |
140 |
rmx_lval(rm,i,j,k) = val[k]; |
141 |
} |
142 |
return(1); |
143 |
} |
144 |
|
145 |
static int |
146 |
rmx_load_double(RMATRIX *rm, FILE *fp) |
147 |
{ |
148 |
int i, j, k; |
149 |
double val[100]; |
150 |
|
151 |
if (rm->ncomp > 100) { |
152 |
fputs("Unsupported # components in rmx_load_double()\n", stderr); |
153 |
exit(1); |
154 |
} |
155 |
for (i = 0; i < rm->nrows; i++) |
156 |
for (j = 0; j < rm->ncols; j++) { |
157 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
158 |
return(0); |
159 |
for (k = rm->ncomp; k--; ) |
160 |
rmx_lval(rm,i,j,k) = val[k]; |
161 |
} |
162 |
return(1); |
163 |
} |
164 |
|
165 |
static int |
166 |
rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
167 |
{ |
168 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
169 |
int i, j; |
170 |
|
171 |
if (scan == NULL) |
172 |
return(0); |
173 |
for (i = 0; i < rm->nrows; i++) { |
174 |
if (freadscan(scan, rm->ncols, fp) < 0) { |
175 |
free(scan); |
176 |
return(0); |
177 |
} |
178 |
for (j = rm->ncols; j--; ) { |
179 |
rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
180 |
rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
181 |
rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
182 |
} |
183 |
} |
184 |
free(scan); |
185 |
return(1); |
186 |
} |
187 |
|
188 |
/* Load matrix from supported file type */ |
189 |
RMATRIX * |
190 |
rmx_load(const char *inspec) |
191 |
{ |
192 |
FILE *fp = stdin; |
193 |
RMATRIX dinfo; |
194 |
RMATRIX *dnew; |
195 |
|
196 |
if (inspec == NULL) { /* reading from stdin? */ |
197 |
inspec = "<stdin>"; |
198 |
#ifdef _WIN32 |
199 |
_setmode(fileno(stdin), _O_BINARY); |
200 |
#endif |
201 |
} else if (inspec[0] == '!') { |
202 |
if ((fp = popen(inspec+1, "r")) == NULL) |
203 |
return(NULL); |
204 |
#ifdef _WIN32 |
205 |
_setmode(fileno(fp), _O_BINARY); |
206 |
#endif |
207 |
} else { |
208 |
const char *sp = inspec; /* check suffix */ |
209 |
while (*sp) |
210 |
++sp; |
211 |
while (sp > inspec && sp[-1] != '.') |
212 |
--sp; |
213 |
if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
214 |
CMATRIX *cm = cm_loadBTDF((char *)inspec); |
215 |
if (cm == NULL) |
216 |
return(NULL); |
217 |
dnew = rmx_from_cmatrix(cm); |
218 |
cm_free(cm); |
219 |
return(dnew); |
220 |
} |
221 |
/* else open it ourselves */ |
222 |
if ((fp = fopen(inspec, "rb")) == NULL) |
223 |
return(NULL); |
224 |
} |
225 |
#ifdef getc_unlocked |
226 |
flockfile(fp); |
227 |
#endif |
228 |
dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0; |
229 |
dinfo.dtype = DTascii; /* assumed w/o FORMAT */ |
230 |
dinfo.info = NULL; |
231 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
232 |
fclose(fp); |
233 |
return(NULL); |
234 |
} |
235 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
236 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
237 |
fclose(fp); |
238 |
return(NULL); |
239 |
} |
240 |
if (dinfo.ncomp <= 0) |
241 |
dinfo.ncomp = 3; |
242 |
else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
243 |
dinfo.ncomp != 3) { |
244 |
fclose(fp); |
245 |
return(NULL); |
246 |
} |
247 |
} |
248 |
dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
249 |
if (dnew == NULL) { |
250 |
fclose(fp); |
251 |
return(NULL); |
252 |
} |
253 |
dnew->info = dinfo.info; |
254 |
switch (dinfo.dtype) { |
255 |
case DTascii: |
256 |
if (!rmx_load_ascii(dnew, fp)) |
257 |
goto loaderr; |
258 |
dnew->dtype = DTascii; /* should leave double? */ |
259 |
break; |
260 |
case DTfloat: |
261 |
if (!rmx_load_float(dnew, fp)) |
262 |
goto loaderr; |
263 |
dnew->dtype = DTfloat; |
264 |
break; |
265 |
case DTdouble: |
266 |
if (!rmx_load_double(dnew, fp)) |
267 |
goto loaderr; |
268 |
dnew->dtype = DTdouble; |
269 |
break; |
270 |
case DTrgbe: |
271 |
case DTxyze: |
272 |
if (!rmx_load_rgbe(dnew, fp)) |
273 |
goto loaderr; |
274 |
dnew->dtype = dinfo.dtype; |
275 |
break; |
276 |
default: |
277 |
goto loaderr; |
278 |
} |
279 |
if (fp != stdin) { |
280 |
if (inspec[0] == '!') |
281 |
pclose(fp); |
282 |
else |
283 |
fclose(fp); |
284 |
} |
285 |
#ifdef getc_unlocked |
286 |
else |
287 |
funlockfile(fp); |
288 |
#endif |
289 |
return(dnew); |
290 |
loaderr: /* should report error? */ |
291 |
if (inspec[0] == '!') |
292 |
pclose(fp); |
293 |
else |
294 |
fclose(fp); |
295 |
rmx_free(dnew); |
296 |
return(NULL); |
297 |
} |
298 |
|
299 |
static int |
300 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
301 |
{ |
302 |
int i, j, k; |
303 |
#ifdef _WIN32 |
304 |
_setmode(fileno(fp), _O_TEXT); |
305 |
#endif |
306 |
for (i = 0; i < rm->nrows; i++) { |
307 |
for (j = 0; j < rm->ncols; j++) { |
308 |
for (k = 0; k < rm->ncomp; k++) |
309 |
fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
310 |
fputc('\t', fp); |
311 |
} |
312 |
fputc('\n', fp); |
313 |
} |
314 |
return(1); |
315 |
} |
316 |
|
317 |
static int |
318 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
319 |
{ |
320 |
int i, j, k; |
321 |
float val[100]; |
322 |
|
323 |
if (rm->ncomp > 100) { |
324 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
325 |
exit(1); |
326 |
} |
327 |
for (i = 0; i < rm->nrows; i++) |
328 |
for (j = 0; j < rm->ncols; j++) { |
329 |
for (k = rm->ncomp; k--; ) |
330 |
val[k] = (float)rmx_lval(rm,i,j,k); |
331 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
332 |
return(0); |
333 |
} |
334 |
return(1); |
335 |
} |
336 |
|
337 |
static int |
338 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
339 |
{ |
340 |
int i, j, k; |
341 |
double val[100]; |
342 |
|
343 |
if (rm->ncomp > 100) { |
344 |
fputs("Unsupported # components in rmx_write_double()\n", stderr); |
345 |
exit(1); |
346 |
} |
347 |
for (i = 0; i < rm->nrows; i++) |
348 |
for (j = 0; j < rm->ncols; j++) { |
349 |
for (k = rm->ncomp; k--; ) |
350 |
val[k] = rmx_lval(rm,i,j,k); |
351 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
352 |
return(0); |
353 |
} |
354 |
return(1); |
355 |
} |
356 |
|
357 |
static int |
358 |
rmx_write_rgbe(const RMATRIX *rm, FILE *fp) |
359 |
{ |
360 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
361 |
int i, j; |
362 |
|
363 |
if (scan == NULL) |
364 |
return(0); |
365 |
for (i = 0; i < rm->nrows; i++) { |
366 |
for (j = rm->ncols; j--; ) |
367 |
setcolor(scan[j], rmx_lval(rm,i,j,0), |
368 |
rmx_lval(rm,i,j,1), |
369 |
rmx_lval(rm,i,j,2) ); |
370 |
if (fwritescan(scan, rm->ncols, fp) < 0) { |
371 |
free(scan); |
372 |
return(0); |
373 |
} |
374 |
} |
375 |
free(scan); |
376 |
return(1); |
377 |
} |
378 |
|
379 |
/* Write matrix to file type indicated by dtype */ |
380 |
int |
381 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
382 |
{ |
383 |
RMATRIX *mydm = NULL; |
384 |
int ok = 1; |
385 |
|
386 |
if ((rm == NULL) | (fp == NULL)) |
387 |
return(0); |
388 |
/* complete header */ |
389 |
if (rm->info) |
390 |
fputs(rm->info, fp); |
391 |
if (dtype == DTfromHeader) |
392 |
dtype = rm->dtype; |
393 |
else if ((dtype == DTrgbe) & (rm->dtype == DTxyze)) |
394 |
dtype = DTxyze; |
395 |
else if ((dtype == DTxyze) & (rm->dtype == DTrgbe)) |
396 |
dtype = DTrgbe; |
397 |
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
398 |
fprintf(fp, "NROWS=%d\n", rm->nrows); |
399 |
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
400 |
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
401 |
} else if (rm->ncomp != 3) { /* wrong # components? */ |
402 |
double cmtx[3]; |
403 |
if (rm->ncomp != 1) /* only convert grayscale */ |
404 |
return(0); |
405 |
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
406 |
mydm = rmx_transform(rm, 3, cmtx); |
407 |
if (mydm == NULL) |
408 |
return(0); |
409 |
rm = mydm; |
410 |
} |
411 |
fputformat((char *)cm_fmt_id[dtype], fp); |
412 |
fputc('\n', fp); |
413 |
switch (dtype) { /* write data */ |
414 |
case DTascii: |
415 |
ok = rmx_write_ascii(rm, fp); |
416 |
break; |
417 |
case DTfloat: |
418 |
ok = rmx_write_float(rm, fp); |
419 |
break; |
420 |
case DTdouble: |
421 |
ok = rmx_write_double(rm, fp); |
422 |
break; |
423 |
case DTrgbe: |
424 |
case DTxyze: |
425 |
fprtresolu(rm->ncols, rm->nrows, fp); |
426 |
ok = rmx_write_rgbe(rm, fp); |
427 |
break; |
428 |
default: |
429 |
return(0); |
430 |
} |
431 |
ok &= (fflush(fp) == 0); |
432 |
rmx_free(mydm); |
433 |
return(ok); |
434 |
} |
435 |
|
436 |
/* Allocate and assign square identity matrix with n components */ |
437 |
RMATRIX * |
438 |
rmx_identity(const int dim, const int n) |
439 |
{ |
440 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
441 |
int i, k; |
442 |
|
443 |
if (rid == NULL) |
444 |
return(NULL); |
445 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim); |
446 |
for (i = dim; i--; ) |
447 |
for (k = n; k--; ) |
448 |
rmx_lval(rid,i,i,k) = 1; |
449 |
return(rid); |
450 |
} |
451 |
|
452 |
/* Duplicate the given matrix */ |
453 |
RMATRIX * |
454 |
rmx_copy(const RMATRIX *rm) |
455 |
{ |
456 |
RMATRIX *dnew; |
457 |
|
458 |
if (rm == NULL) |
459 |
return(NULL); |
460 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
461 |
if (dnew == NULL) |
462 |
return(NULL); |
463 |
rmx_addinfo(dnew, rm->info); |
464 |
dnew->dtype = rm->dtype; |
465 |
memcpy(dnew->mtx, rm->mtx, |
466 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
467 |
return(dnew); |
468 |
} |
469 |
|
470 |
/* Allocate and assign transposed matrix */ |
471 |
RMATRIX * |
472 |
rmx_transpose(const RMATRIX *rm) |
473 |
{ |
474 |
RMATRIX *dnew; |
475 |
int i, j, k; |
476 |
|
477 |
if (rm == NULL) |
478 |
return(0); |
479 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
480 |
if (dnew == NULL) |
481 |
return(NULL); |
482 |
if (rm->info) { |
483 |
rmx_addinfo(dnew, rm->info); |
484 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
485 |
} |
486 |
dnew->dtype = rm->dtype; |
487 |
for (i = dnew->nrows; i--; ) |
488 |
for (j = dnew->ncols; j--; ) |
489 |
for (k = dnew->ncomp; k--; ) |
490 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
491 |
return(dnew); |
492 |
} |
493 |
|
494 |
/* Multiply (concatenate) two matrices and allocate the result */ |
495 |
RMATRIX * |
496 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
497 |
{ |
498 |
RMATRIX *mres; |
499 |
int i, j, k, h; |
500 |
|
501 |
if ((m1 == NULL) | (m2 == NULL) || |
502 |
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
503 |
return(NULL); |
504 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
505 |
if (mres == NULL) |
506 |
return(NULL); |
507 |
i = rmx_newtype(m1->dtype, m2->dtype); |
508 |
if (i) |
509 |
mres->dtype = i; |
510 |
else |
511 |
rmx_addinfo(mres, rmx_mismatch_warn); |
512 |
for (i = mres->nrows; i--; ) |
513 |
for (j = mres->ncols; j--; ) |
514 |
for (k = mres->ncomp; k--; ) { |
515 |
long double d = 0; |
516 |
for (h = m1->ncols; h--; ) |
517 |
d += (long double)rmx_lval(m1,i,h,k) * |
518 |
(long double)rmx_lval(m2,h,j,k); |
519 |
rmx_lval(mres,i,j,k) = (double)d; |
520 |
} |
521 |
return(mres); |
522 |
} |
523 |
|
524 |
/* Sum second matrix into first, applying scale factor beforehand */ |
525 |
int |
526 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
527 |
{ |
528 |
double *mysf = NULL; |
529 |
int i, j, k; |
530 |
|
531 |
if ((msum == NULL) | (madd == NULL) || |
532 |
(msum->nrows != madd->nrows) | |
533 |
(msum->ncols != madd->ncols) | |
534 |
(msum->ncomp != madd->ncomp)) |
535 |
return(0); |
536 |
if (sf == NULL) { |
537 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
538 |
if (mysf == NULL) |
539 |
return(0); |
540 |
for (k = msum->ncomp; k--; ) |
541 |
mysf[k] = 1; |
542 |
sf = mysf; |
543 |
} |
544 |
i = rmx_newtype(msum->dtype, madd->dtype); |
545 |
if (i) |
546 |
msum->dtype = i; |
547 |
else |
548 |
rmx_addinfo(msum, rmx_mismatch_warn); |
549 |
for (i = msum->nrows; i--; ) |
550 |
for (j = msum->ncols; j--; ) |
551 |
for (k = msum->ncomp; k--; ) |
552 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
553 |
|
554 |
free(mysf); |
555 |
return(1); |
556 |
} |
557 |
|
558 |
/* Scale the given matrix by the indicated scalar component vector */ |
559 |
int |
560 |
rmx_scale(RMATRIX *rm, const double sf[]) |
561 |
{ |
562 |
int i, j, k; |
563 |
|
564 |
if ((rm == NULL) | (sf == NULL)) |
565 |
return(0); |
566 |
for (i = rm->nrows; i--; ) |
567 |
for (j = rm->ncols; j--; ) |
568 |
for (k = rm->ncomp; k--; ) |
569 |
rmx_lval(rm,i,j,k) *= sf[k]; |
570 |
|
571 |
return(1); |
572 |
} |
573 |
|
574 |
/* Allocate new matrix and apply component transformation */ |
575 |
RMATRIX * |
576 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
577 |
{ |
578 |
int i, j, ks, kd; |
579 |
RMATRIX *dnew; |
580 |
|
581 |
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
582 |
return(NULL); |
583 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
584 |
if (dnew == NULL) |
585 |
return(NULL); |
586 |
dnew->dtype = msrc->dtype; |
587 |
for (i = dnew->nrows; i--; ) |
588 |
for (j = dnew->ncols; j--; ) |
589 |
for (kd = dnew->ncomp; kd--; ) { |
590 |
double d = 0; |
591 |
for (ks = msrc->ncomp; ks--; ) |
592 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
593 |
rmx_lval(dnew,i,j,kd) = d; |
594 |
} |
595 |
return(dnew); |
596 |
} |
597 |
|
598 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
599 |
RMATRIX * |
600 |
rmx_from_cmatrix(const CMATRIX *cm) |
601 |
{ |
602 |
int i, j; |
603 |
RMATRIX *dnew; |
604 |
|
605 |
if (cm == NULL) |
606 |
return(NULL); |
607 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
608 |
if (dnew == NULL) |
609 |
return(NULL); |
610 |
dnew->dtype = DTfloat; |
611 |
for (i = dnew->nrows; i--; ) |
612 |
for (j = dnew->ncols; j--; ) { |
613 |
const COLORV *cv = cm_lval(cm,i,j); |
614 |
rmx_lval(dnew,i,j,0) = cv[0]; |
615 |
rmx_lval(dnew,i,j,1) = cv[1]; |
616 |
rmx_lval(dnew,i,j,2) = cv[2]; |
617 |
} |
618 |
return(dnew); |
619 |
} |
620 |
|
621 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
622 |
CMATRIX * |
623 |
cm_from_rmatrix(const RMATRIX *rm) |
624 |
{ |
625 |
int i, j; |
626 |
CMATRIX *cnew; |
627 |
|
628 |
if (rm == NULL || rm->ncomp != 3) |
629 |
return(NULL); |
630 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
631 |
if (cnew == NULL) |
632 |
return(NULL); |
633 |
for (i = cnew->nrows; i--; ) |
634 |
for (j = cnew->ncols; j--; ) { |
635 |
COLORV *cv = cm_lval(cnew,i,j); |
636 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
637 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
638 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
639 |
} |
640 |
return(cnew); |
641 |
} |