1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.10 2014/09/18 23:20:12 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 "rmatrix.h" |
14 |
|
15 |
static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n"; |
16 |
|
17 |
/* Allocate a nr x nc matrix with n components */ |
18 |
RMATRIX * |
19 |
rmx_alloc(int nr, int nc, int n) |
20 |
{ |
21 |
RMATRIX *dnew; |
22 |
|
23 |
if ((nr <= 0) | (nc <= 0) | (n <= 0)) |
24 |
return(NULL); |
25 |
dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) + |
26 |
sizeof(dnew->mtx[0])*(n*nr*nc)); |
27 |
if (dnew == NULL) |
28 |
return(NULL); |
29 |
dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n; |
30 |
dnew->dtype = DTdouble; |
31 |
dnew->info = NULL; |
32 |
return(dnew); |
33 |
} |
34 |
|
35 |
/* Free a RMATRIX array */ |
36 |
void |
37 |
rmx_free(RMATRIX *rm) |
38 |
{ |
39 |
if (!rm) return; |
40 |
if (rm->info) |
41 |
free(rm->info); |
42 |
free(rm); |
43 |
} |
44 |
|
45 |
/* Resolve data type based on two input types (returns 0 for mismatch) */ |
46 |
int |
47 |
rmx_newtype(int dtyp1, int dtyp2) |
48 |
{ |
49 |
if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) && dtyp1 != dtyp2) |
50 |
return(0); |
51 |
if (dtyp1 < dtyp2) |
52 |
return(dtyp1); |
53 |
return(dtyp2); |
54 |
} |
55 |
|
56 |
/* Append header information associated with matrix data */ |
57 |
int |
58 |
rmx_addinfo(RMATRIX *rm, const char *info) |
59 |
{ |
60 |
if (!info || !*info) |
61 |
return(0); |
62 |
if (!rm->info) { |
63 |
rm->info = (char *)malloc(strlen(info)+1); |
64 |
if (rm->info) rm->info[0] = '\0'; |
65 |
} else |
66 |
rm->info = (char *)realloc(rm->info, |
67 |
strlen(rm->info)+strlen(info)+1); |
68 |
if (!rm->info) |
69 |
return(0); |
70 |
strcat(rm->info, info); |
71 |
return(1); |
72 |
} |
73 |
|
74 |
static int |
75 |
get_dminfo(char *s, void *p) |
76 |
{ |
77 |
RMATRIX *ip = (RMATRIX *)p; |
78 |
char fmt[64]; |
79 |
int i; |
80 |
|
81 |
if (headidval(fmt, s)) |
82 |
return(0); |
83 |
if (!strncmp(s, "NCOMP=", 6)) { |
84 |
ip->ncomp = atoi(s+6); |
85 |
return(0); |
86 |
} |
87 |
if (!strncmp(s, "NROWS=", 6)) { |
88 |
ip->nrows = atoi(s+6); |
89 |
return(0); |
90 |
} |
91 |
if (!strncmp(s, "NCOLS=", 6)) { |
92 |
ip->ncols = atoi(s+6); |
93 |
return(0); |
94 |
} |
95 |
if (!formatval(fmt, s)) { |
96 |
rmx_addinfo(ip, s); |
97 |
return(0); |
98 |
} |
99 |
for (i = 1; i < DTend; i++) |
100 |
if (!strcmp(fmt, cm_fmt_id[i])) { |
101 |
ip->dtype = i; |
102 |
return(0); |
103 |
} |
104 |
return(-1); |
105 |
} |
106 |
|
107 |
static int |
108 |
rmx_load_ascii(RMATRIX *rm, FILE *fp) |
109 |
{ |
110 |
int i, j, k; |
111 |
#ifdef _WIN32 |
112 |
_setmode(fileno(fp), _O_TEXT); |
113 |
#endif |
114 |
for (i = 0; i < rm->nrows; i++) |
115 |
for (j = 0; j < rm->ncols; j++) |
116 |
for (k = 0; k < rm->ncomp; k++) |
117 |
if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
118 |
return(0); |
119 |
return(1); |
120 |
} |
121 |
|
122 |
static int |
123 |
rmx_load_float(RMATRIX *rm, FILE *fp) |
124 |
{ |
125 |
int i, j, k; |
126 |
float val[100]; |
127 |
|
128 |
if (rm->ncomp > 100) { |
129 |
fputs("Unsupported # components in rmx_load_float()\n", stderr); |
130 |
exit(1); |
131 |
} |
132 |
for (i = 0; i < rm->nrows; i++) |
133 |
for (j = 0; j < rm->ncols; j++) { |
134 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
135 |
return(0); |
136 |
for (k = rm->ncomp; k--; ) |
137 |
rmx_lval(rm,i,j,k) = val[k]; |
138 |
} |
139 |
return(1); |
140 |
} |
141 |
|
142 |
static int |
143 |
rmx_load_double(RMATRIX *rm, FILE *fp) |
144 |
{ |
145 |
int i, j, k; |
146 |
double val[100]; |
147 |
|
148 |
if (rm->ncomp > 100) { |
149 |
fputs("Unsupported # components in rmx_load_double()\n", stderr); |
150 |
exit(1); |
151 |
} |
152 |
for (i = 0; i < rm->nrows; i++) |
153 |
for (j = 0; j < rm->ncols; j++) { |
154 |
if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
155 |
return(0); |
156 |
for (k = rm->ncomp; k--; ) |
157 |
rmx_lval(rm,i,j,k) = val[k]; |
158 |
} |
159 |
return(1); |
160 |
} |
161 |
|
162 |
static int |
163 |
rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
164 |
{ |
165 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
166 |
int i, j; |
167 |
|
168 |
if (scan == NULL) |
169 |
return(0); |
170 |
for (i = 0; i < rm->nrows; i++) { |
171 |
if (freadscan(scan, rm->ncols, fp) < 0) { |
172 |
free(scan); |
173 |
return(0); |
174 |
} |
175 |
for (j = rm->ncols; j--; ) { |
176 |
rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
177 |
rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
178 |
rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
179 |
} |
180 |
} |
181 |
free(scan); |
182 |
return(1); |
183 |
} |
184 |
|
185 |
/* Load matrix from supported file type */ |
186 |
RMATRIX * |
187 |
rmx_load(const char *fname) |
188 |
{ |
189 |
FILE *fp = stdin; |
190 |
RMATRIX dinfo; |
191 |
RMATRIX *dnew; |
192 |
|
193 |
if (fname == NULL) { /* reading from stdin? */ |
194 |
fname = "<stdin>"; |
195 |
#ifdef _WIN32 |
196 |
_setmode(fileno(stdin), _O_BINARY); |
197 |
#endif |
198 |
} else { |
199 |
const char *sp = fname; /* check suffix */ |
200 |
while (*sp) |
201 |
++sp; |
202 |
while (sp > fname && sp[-1] != '.') |
203 |
--sp; |
204 |
if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
205 |
CMATRIX *cm = cm_loadBTDF((char *)fname); |
206 |
if (cm == NULL) |
207 |
return(NULL); |
208 |
dnew = rmx_from_cmatrix(cm); |
209 |
cm_free(cm); |
210 |
return(dnew); |
211 |
} |
212 |
/* else open it ourselves */ |
213 |
if ((fp = fopen(fname, "rb")) == NULL) |
214 |
return(NULL); |
215 |
} |
216 |
#ifdef getc_unlocked |
217 |
flockfile(fp); |
218 |
#endif |
219 |
dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0; |
220 |
dinfo.dtype = DTascii; /* assumed w/o FORMAT */ |
221 |
dinfo.info = NULL; |
222 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
223 |
fclose(fp); |
224 |
return(NULL); |
225 |
} |
226 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
227 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
228 |
fclose(fp); |
229 |
return(NULL); |
230 |
} |
231 |
if (dinfo.ncomp <= 0) |
232 |
dinfo.ncomp = 3; |
233 |
else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
234 |
dinfo.ncomp != 3) { |
235 |
fclose(fp); |
236 |
return(NULL); |
237 |
} |
238 |
} |
239 |
dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
240 |
if (dnew == NULL) { |
241 |
fclose(fp); |
242 |
return(NULL); |
243 |
} |
244 |
dnew->info = dinfo.info; |
245 |
switch (dinfo.dtype) { |
246 |
case DTascii: |
247 |
if (!rmx_load_ascii(dnew, fp)) |
248 |
goto loaderr; |
249 |
dnew->dtype = DTascii; /* should leave double? */ |
250 |
break; |
251 |
case DTfloat: |
252 |
if (!rmx_load_float(dnew, fp)) |
253 |
goto loaderr; |
254 |
dnew->dtype = DTfloat; |
255 |
break; |
256 |
case DTdouble: |
257 |
if (!rmx_load_double(dnew, fp)) |
258 |
goto loaderr; |
259 |
dnew->dtype = DTdouble; |
260 |
break; |
261 |
case DTrgbe: |
262 |
case DTxyze: |
263 |
if (!rmx_load_rgbe(dnew, fp)) |
264 |
goto loaderr; |
265 |
dnew->dtype = dinfo.dtype; |
266 |
break; |
267 |
default: |
268 |
goto loaderr; |
269 |
} |
270 |
if (fp != stdin) |
271 |
fclose(fp); |
272 |
return(dnew); |
273 |
loaderr: /* should report error? */ |
274 |
fclose(fp); |
275 |
rmx_free(dnew); |
276 |
return(NULL); |
277 |
} |
278 |
|
279 |
static int |
280 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
281 |
{ |
282 |
int i, j, k; |
283 |
#ifdef _WIN32 |
284 |
_setmode(fileno(fp), _O_TEXT); |
285 |
#endif |
286 |
for (i = 0; i < rm->nrows; i++) { |
287 |
for (j = 0; j < rm->ncols; j++) { |
288 |
for (k = 0; k < rm->ncomp; k++) |
289 |
fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
290 |
fputc('\t', fp); |
291 |
} |
292 |
fputc('\n', fp); |
293 |
} |
294 |
return(1); |
295 |
} |
296 |
|
297 |
static int |
298 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
299 |
{ |
300 |
int i, j, k; |
301 |
float val[100]; |
302 |
|
303 |
if (rm->ncomp > 100) { |
304 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
305 |
exit(1); |
306 |
} |
307 |
for (i = 0; i < rm->nrows; i++) |
308 |
for (j = 0; j < rm->ncols; j++) { |
309 |
for (k = rm->ncomp; k--; ) |
310 |
val[k] = (float)rmx_lval(rm,i,j,k); |
311 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
312 |
return(0); |
313 |
} |
314 |
return(1); |
315 |
} |
316 |
|
317 |
static int |
318 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
319 |
{ |
320 |
int i, j, k; |
321 |
double val[100]; |
322 |
|
323 |
if (rm->ncomp > 100) { |
324 |
fputs("Unsupported # components in rmx_write_double()\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] = 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_rgbe(const RMATRIX *rm, FILE *fp) |
339 |
{ |
340 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
341 |
int i, j; |
342 |
|
343 |
if (scan == NULL) |
344 |
return(0); |
345 |
for (i = 0; i < rm->nrows; i++) { |
346 |
for (j = rm->ncols; j--; ) |
347 |
setcolor(scan[j], rmx_lval(rm,i,j,0), |
348 |
rmx_lval(rm,i,j,1), |
349 |
rmx_lval(rm,i,j,2) ); |
350 |
if (fwritescan(scan, rm->ncols, fp) < 0) { |
351 |
free(scan); |
352 |
return(0); |
353 |
} |
354 |
} |
355 |
free(scan); |
356 |
return(1); |
357 |
} |
358 |
|
359 |
/* Write matrix to file type indicated by dtype */ |
360 |
int |
361 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
362 |
{ |
363 |
RMATRIX *mydm = NULL; |
364 |
int ok = 1; |
365 |
|
366 |
if ((rm == NULL) | (fp == NULL)) |
367 |
return(0); |
368 |
/* complete header */ |
369 |
if (rm->info) |
370 |
fputs(rm->info, fp); |
371 |
if (dtype == DTfromHeader) |
372 |
dtype = rm->dtype; |
373 |
else if ((dtype == DTrgbe) & (rm->dtype == DTxyze)) |
374 |
dtype = DTxyze; |
375 |
else if ((dtype == DTxyze) & (rm->dtype == DTrgbe)) |
376 |
dtype = DTrgbe; |
377 |
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
378 |
fprintf(fp, "NROWS=%d\n", rm->nrows); |
379 |
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
380 |
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
381 |
} else if (rm->ncomp != 3) { /* wrong # components? */ |
382 |
double cmtx[3]; |
383 |
if (rm->ncomp != 1) /* only convert grayscale */ |
384 |
return(0); |
385 |
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
386 |
mydm = rmx_transform(rm, 3, cmtx); |
387 |
if (mydm == NULL) |
388 |
return(0); |
389 |
rm = mydm; |
390 |
} |
391 |
fputformat((char *)cm_fmt_id[dtype], fp); |
392 |
fputc('\n', fp); |
393 |
switch (dtype) { /* write data */ |
394 |
case DTascii: |
395 |
ok = rmx_write_ascii(rm, fp); |
396 |
break; |
397 |
case DTfloat: |
398 |
ok = rmx_write_float(rm, fp); |
399 |
break; |
400 |
case DTdouble: |
401 |
ok = rmx_write_double(rm, fp); |
402 |
break; |
403 |
case DTrgbe: |
404 |
case DTxyze: |
405 |
fprtresolu(rm->ncols, rm->nrows, fp); |
406 |
ok = rmx_write_rgbe(rm, fp); |
407 |
break; |
408 |
default: |
409 |
return(0); |
410 |
} |
411 |
ok &= (fflush(fp) == 0); |
412 |
rmx_free(mydm); |
413 |
return(ok); |
414 |
} |
415 |
|
416 |
/* Allocate and assign square identity matrix with n components */ |
417 |
RMATRIX * |
418 |
rmx_identity(const int dim, const int n) |
419 |
{ |
420 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
421 |
int i; |
422 |
|
423 |
if (rid == NULL) |
424 |
return(NULL); |
425 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*dim*dim); |
426 |
for (i = dim; i--; ) |
427 |
rmx_lval(rid,i,i,0) = 1; |
428 |
for (i = n; --i; ) |
429 |
memcpy(rid->mtx+i*(dim*dim), rid->mtx, |
430 |
sizeof(rid->mtx[0])*dim*dim); |
431 |
return(rid); |
432 |
} |
433 |
|
434 |
/* Duplicate the given matrix */ |
435 |
RMATRIX * |
436 |
rmx_copy(const RMATRIX *rm) |
437 |
{ |
438 |
RMATRIX *dnew; |
439 |
|
440 |
if (rm == NULL) |
441 |
return(NULL); |
442 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
443 |
if (dnew == NULL) |
444 |
return(NULL); |
445 |
rmx_addinfo(dnew, rm->info); |
446 |
dnew->dtype = rm->dtype; |
447 |
memcpy(dnew->mtx, rm->mtx, |
448 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
449 |
return(dnew); |
450 |
} |
451 |
|
452 |
/* Allocate and assign transposed matrix */ |
453 |
RMATRIX * |
454 |
rmx_transpose(const RMATRIX *rm) |
455 |
{ |
456 |
RMATRIX *dnew; |
457 |
int i, j, k; |
458 |
|
459 |
if (rm == NULL) |
460 |
return(0); |
461 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
462 |
if (dnew == NULL) |
463 |
return(NULL); |
464 |
if (rm->info) { |
465 |
rmx_addinfo(dnew, rm->info); |
466 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
467 |
} |
468 |
dnew->dtype = rm->dtype; |
469 |
for (i = dnew->nrows; i--; ) |
470 |
for (j = dnew->ncols; j--; ) |
471 |
for (k = dnew->ncomp; k--; ) |
472 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
473 |
return(dnew); |
474 |
} |
475 |
|
476 |
/* Multiply (concatenate) two matrices and allocate the result */ |
477 |
RMATRIX * |
478 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
479 |
{ |
480 |
RMATRIX *mres; |
481 |
int i, j, k, h; |
482 |
|
483 |
if ((m1 == NULL) | (m2 == NULL) || |
484 |
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
485 |
return(NULL); |
486 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
487 |
if (mres == NULL) |
488 |
return(NULL); |
489 |
i = rmx_newtype(m1->dtype, m2->dtype); |
490 |
if (i) |
491 |
mres->dtype = i; |
492 |
else |
493 |
rmx_addinfo(mres, rmx_mismatch_warn); |
494 |
for (i = mres->nrows; i--; ) |
495 |
for (j = mres->ncols; j--; ) |
496 |
for (k = mres->ncomp; k--; ) { |
497 |
long double d = 0; |
498 |
for (h = m1->ncols; h--; ) |
499 |
d += (long double)rmx_lval(m1,i,h,k) * |
500 |
(long double)rmx_lval(m2,h,j,k); |
501 |
rmx_lval(mres,i,j,k) = (double)d; |
502 |
} |
503 |
return(mres); |
504 |
} |
505 |
|
506 |
/* Sum second matrix into first, applying scale factor beforehand */ |
507 |
int |
508 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
509 |
{ |
510 |
double *mysf = NULL; |
511 |
int i, j, k; |
512 |
|
513 |
if ((msum == NULL) | (madd == NULL) || |
514 |
(msum->nrows != madd->nrows) | |
515 |
(msum->ncols != madd->ncols) | |
516 |
(msum->ncomp != madd->ncomp)) |
517 |
return(0); |
518 |
if (sf == NULL) { |
519 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
520 |
if (mysf == NULL) |
521 |
return(0); |
522 |
for (k = msum->ncomp; k--; ) |
523 |
mysf[k] = 1; |
524 |
sf = mysf; |
525 |
} |
526 |
i = rmx_newtype(msum->dtype, madd->dtype); |
527 |
if (i) |
528 |
msum->dtype = i; |
529 |
else |
530 |
rmx_addinfo(msum, rmx_mismatch_warn); |
531 |
for (i = msum->nrows; i--; ) |
532 |
for (j = msum->ncols; j--; ) |
533 |
for (k = msum->ncomp; k--; ) |
534 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
535 |
|
536 |
free(mysf); |
537 |
return(1); |
538 |
} |
539 |
|
540 |
/* Scale the given matrix by the indicated scalar component vector */ |
541 |
int |
542 |
rmx_scale(RMATRIX *rm, const double sf[]) |
543 |
{ |
544 |
int i, j, k; |
545 |
|
546 |
if ((rm == NULL) | (sf == NULL)) |
547 |
return(0); |
548 |
for (i = rm->nrows; i--; ) |
549 |
for (j = rm->ncols; j--; ) |
550 |
for (k = rm->ncomp; k--; ) |
551 |
rmx_lval(rm,i,j,k) *= sf[k]; |
552 |
|
553 |
return(1); |
554 |
} |
555 |
|
556 |
/* Allocate new matrix and apply component transformation */ |
557 |
RMATRIX * |
558 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
559 |
{ |
560 |
int i, j, ks, kd; |
561 |
RMATRIX *dnew; |
562 |
|
563 |
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
564 |
return(NULL); |
565 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
566 |
if (dnew == NULL) |
567 |
return(NULL); |
568 |
dnew->dtype = msrc->dtype; |
569 |
for (i = dnew->nrows; i--; ) |
570 |
for (j = dnew->ncols; j--; ) |
571 |
for (kd = dnew->ncomp; kd--; ) { |
572 |
double d = 0; |
573 |
for (ks = msrc->ncomp; ks--; ) |
574 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
575 |
rmx_lval(dnew,i,j,kd) = d; |
576 |
} |
577 |
return(dnew); |
578 |
} |
579 |
|
580 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
581 |
RMATRIX * |
582 |
rmx_from_cmatrix(const CMATRIX *cm) |
583 |
{ |
584 |
int i, j; |
585 |
RMATRIX *dnew; |
586 |
|
587 |
if (cm == NULL) |
588 |
return(NULL); |
589 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
590 |
if (dnew == NULL) |
591 |
return(NULL); |
592 |
dnew->dtype = DTfloat; |
593 |
for (i = dnew->nrows; i--; ) |
594 |
for (j = dnew->ncols; j--; ) { |
595 |
const COLORV *cv = cm_lval(cm,i,j); |
596 |
rmx_lval(dnew,i,j,0) = cv[0]; |
597 |
rmx_lval(dnew,i,j,1) = cv[1]; |
598 |
rmx_lval(dnew,i,j,2) = cv[2]; |
599 |
} |
600 |
return(dnew); |
601 |
} |
602 |
|
603 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
604 |
CMATRIX * |
605 |
cm_from_rmatrix(const RMATRIX *rm) |
606 |
{ |
607 |
int i, j; |
608 |
CMATRIX *cnew; |
609 |
|
610 |
if (rm == NULL || rm->ncomp != 3) |
611 |
return(NULL); |
612 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
613 |
if (cnew == NULL) |
614 |
return(NULL); |
615 |
for (i = cnew->nrows; i--; ) |
616 |
for (j = cnew->ncols; j--; ) { |
617 |
COLORV *cv = cm_lval(cnew,i,j); |
618 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
619 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
620 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
621 |
} |
622 |
return(cnew); |
623 |
} |