1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.9 2014/08/28 05:59:42 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 |
break; |
250 |
case DTfloat: |
251 |
if (!rmx_load_float(dnew, fp)) |
252 |
goto loaderr; |
253 |
dnew->dtype = DTfloat; |
254 |
break; |
255 |
case DTdouble: |
256 |
if (!rmx_load_double(dnew, fp)) |
257 |
goto loaderr; |
258 |
dnew->dtype = DTdouble; |
259 |
break; |
260 |
case DTrgbe: |
261 |
case DTxyze: |
262 |
if (!rmx_load_rgbe(dnew, fp)) |
263 |
goto loaderr; |
264 |
dnew->dtype = dinfo.dtype; |
265 |
break; |
266 |
default: |
267 |
goto loaderr; |
268 |
} |
269 |
if (fp != stdin) |
270 |
fclose(fp); |
271 |
return(dnew); |
272 |
loaderr: /* should report error? */ |
273 |
fclose(fp); |
274 |
rmx_free(dnew); |
275 |
return(NULL); |
276 |
} |
277 |
|
278 |
static int |
279 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
280 |
{ |
281 |
int i, j, k; |
282 |
#ifdef _WIN32 |
283 |
_setmode(fileno(fp), _O_TEXT); |
284 |
#endif |
285 |
for (i = 0; i < rm->nrows; i++) { |
286 |
for (j = 0; j < rm->ncols; j++) { |
287 |
for (k = 0; k < rm->ncomp; k++) |
288 |
fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
289 |
fputc('\t', fp); |
290 |
} |
291 |
fputc('\n', fp); |
292 |
} |
293 |
return(1); |
294 |
} |
295 |
|
296 |
static int |
297 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
298 |
{ |
299 |
int i, j, k; |
300 |
float val[100]; |
301 |
|
302 |
if (rm->ncomp > 100) { |
303 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
304 |
exit(1); |
305 |
} |
306 |
for (i = 0; i < rm->nrows; i++) |
307 |
for (j = 0; j < rm->ncols; j++) { |
308 |
for (k = rm->ncomp; k--; ) |
309 |
val[k] = (float)rmx_lval(rm,i,j,k); |
310 |
if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
311 |
return(0); |
312 |
} |
313 |
return(1); |
314 |
} |
315 |
|
316 |
static int |
317 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
318 |
{ |
319 |
int i, j, k; |
320 |
double val[100]; |
321 |
|
322 |
if (rm->ncomp > 100) { |
323 |
fputs("Unsupported # components in rmx_write_double()\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] = 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_rgbe(const RMATRIX *rm, FILE *fp) |
338 |
{ |
339 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
340 |
int i, j; |
341 |
|
342 |
if (scan == NULL) |
343 |
return(0); |
344 |
for (i = 0; i < rm->nrows; i++) { |
345 |
for (j = rm->ncols; j--; ) |
346 |
setcolor(scan[j], rmx_lval(rm,i,j,0), |
347 |
rmx_lval(rm,i,j,1), |
348 |
rmx_lval(rm,i,j,2) ); |
349 |
if (fwritescan(scan, rm->ncols, fp) < 0) { |
350 |
free(scan); |
351 |
return(0); |
352 |
} |
353 |
} |
354 |
free(scan); |
355 |
return(1); |
356 |
} |
357 |
|
358 |
/* Write matrix to file type indicated by dtype */ |
359 |
int |
360 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
361 |
{ |
362 |
RMATRIX *mydm = NULL; |
363 |
int ok = 1; |
364 |
|
365 |
if ((rm == NULL) | (fp == NULL)) |
366 |
return(0); |
367 |
/* complete header */ |
368 |
if (rm->info) |
369 |
fputs(rm->info, fp); |
370 |
if (dtype == DTfromHeader) |
371 |
dtype = rm->dtype; |
372 |
else if ((dtype == DTrgbe) & (rm->dtype == DTxyze)) |
373 |
dtype = DTxyze; |
374 |
else if ((dtype == DTxyze) & (rm->dtype == DTrgbe)) |
375 |
dtype = DTrgbe; |
376 |
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
377 |
fprintf(fp, "NROWS=%d\n", rm->nrows); |
378 |
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
379 |
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
380 |
} else if (rm->ncomp != 3) { /* wrong # components? */ |
381 |
double cmtx[3]; |
382 |
if (rm->ncomp != 1) /* only convert grayscale */ |
383 |
return(0); |
384 |
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
385 |
mydm = rmx_transform(rm, 3, cmtx); |
386 |
if (mydm == NULL) |
387 |
return(0); |
388 |
rm = mydm; |
389 |
} |
390 |
fputformat((char *)cm_fmt_id[dtype], fp); |
391 |
fputc('\n', fp); |
392 |
switch (dtype) { /* write data */ |
393 |
case DTascii: |
394 |
ok = rmx_write_ascii(rm, fp); |
395 |
break; |
396 |
case DTfloat: |
397 |
ok = rmx_write_float(rm, fp); |
398 |
break; |
399 |
case DTdouble: |
400 |
ok = rmx_write_double(rm, fp); |
401 |
break; |
402 |
case DTrgbe: |
403 |
case DTxyze: |
404 |
fprtresolu(rm->ncols, rm->nrows, fp); |
405 |
ok = rmx_write_rgbe(rm, fp); |
406 |
break; |
407 |
default: |
408 |
return(0); |
409 |
} |
410 |
ok &= (fflush(fp) == 0); |
411 |
rmx_free(mydm); |
412 |
return(ok); |
413 |
} |
414 |
|
415 |
/* Allocate and assign square identity matrix with n components */ |
416 |
RMATRIX * |
417 |
rmx_identity(const int dim, const int n) |
418 |
{ |
419 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
420 |
int i; |
421 |
|
422 |
if (rid == NULL) |
423 |
return(NULL); |
424 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*dim*dim); |
425 |
for (i = dim; i--; ) |
426 |
rmx_lval(rid,i,i,0) = 1; |
427 |
for (i = n; --i; ) |
428 |
memcpy(rid->mtx+i*(dim*dim), rid->mtx, |
429 |
sizeof(rid->mtx[0])*dim*dim); |
430 |
return(rid); |
431 |
} |
432 |
|
433 |
/* Duplicate the given matrix */ |
434 |
RMATRIX * |
435 |
rmx_copy(const RMATRIX *rm) |
436 |
{ |
437 |
RMATRIX *dnew; |
438 |
|
439 |
if (rm == NULL) |
440 |
return(NULL); |
441 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
442 |
if (dnew == NULL) |
443 |
return(NULL); |
444 |
rmx_addinfo(dnew, rm->info); |
445 |
dnew->dtype = rm->dtype; |
446 |
memcpy(dnew->mtx, rm->mtx, |
447 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
448 |
return(dnew); |
449 |
} |
450 |
|
451 |
/* Allocate and assign transposed matrix */ |
452 |
RMATRIX * |
453 |
rmx_transpose(const RMATRIX *rm) |
454 |
{ |
455 |
RMATRIX *dnew; |
456 |
int i, j, k; |
457 |
|
458 |
if (rm == NULL) |
459 |
return(0); |
460 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
461 |
if (dnew == NULL) |
462 |
return(NULL); |
463 |
if (rm->info) { |
464 |
rmx_addinfo(dnew, rm->info); |
465 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
466 |
} |
467 |
dnew->dtype = rm->dtype; |
468 |
for (i = dnew->nrows; i--; ) |
469 |
for (j = dnew->ncols; j--; ) |
470 |
for (k = dnew->ncomp; k--; ) |
471 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
472 |
return(dnew); |
473 |
} |
474 |
|
475 |
/* Multiply (concatenate) two matrices and allocate the result */ |
476 |
RMATRIX * |
477 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
478 |
{ |
479 |
RMATRIX *mres; |
480 |
int i, j, k, h; |
481 |
|
482 |
if ((m1 == NULL) | (m2 == NULL) || |
483 |
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
484 |
return(NULL); |
485 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
486 |
if (mres == NULL) |
487 |
return(NULL); |
488 |
i = rmx_newtype(m1->dtype, m2->dtype); |
489 |
if (i) |
490 |
mres->dtype = i; |
491 |
else |
492 |
rmx_addinfo(mres, rmx_mismatch_warn); |
493 |
for (i = mres->nrows; i--; ) |
494 |
for (j = mres->ncols; j--; ) |
495 |
for (k = mres->ncomp; k--; ) { |
496 |
long double d = 0; |
497 |
for (h = m1->ncols; h--; ) |
498 |
d += (long double)rmx_lval(m1,i,h,k) * |
499 |
(long double)rmx_lval(m2,h,j,k); |
500 |
rmx_lval(mres,i,j,k) = (double)d; |
501 |
} |
502 |
return(mres); |
503 |
} |
504 |
|
505 |
/* Sum second matrix into first, applying scale factor beforehand */ |
506 |
int |
507 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
508 |
{ |
509 |
double *mysf = NULL; |
510 |
int i, j, k; |
511 |
|
512 |
if ((msum == NULL) | (madd == NULL) || |
513 |
(msum->nrows != madd->nrows) | |
514 |
(msum->ncols != madd->ncols) | |
515 |
(msum->ncomp != madd->ncomp)) |
516 |
return(0); |
517 |
if (sf == NULL) { |
518 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
519 |
if (mysf == NULL) |
520 |
return(0); |
521 |
for (k = msum->ncomp; k--; ) |
522 |
mysf[k] = 1; |
523 |
sf = mysf; |
524 |
} |
525 |
i = rmx_newtype(msum->dtype, madd->dtype); |
526 |
if (i) |
527 |
msum->dtype = i; |
528 |
else |
529 |
rmx_addinfo(msum, rmx_mismatch_warn); |
530 |
for (i = msum->nrows; i--; ) |
531 |
for (j = msum->ncols; j--; ) |
532 |
for (k = msum->ncomp; k--; ) |
533 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
534 |
|
535 |
free(mysf); |
536 |
return(1); |
537 |
} |
538 |
|
539 |
/* Scale the given matrix by the indicated scalar component vector */ |
540 |
int |
541 |
rmx_scale(RMATRIX *rm, const double sf[]) |
542 |
{ |
543 |
int i, j, k; |
544 |
|
545 |
if ((rm == NULL) | (sf == NULL)) |
546 |
return(0); |
547 |
for (i = rm->nrows; i--; ) |
548 |
for (j = rm->ncols; j--; ) |
549 |
for (k = rm->ncomp; k--; ) |
550 |
rmx_lval(rm,i,j,k) *= sf[k]; |
551 |
|
552 |
return(1); |
553 |
} |
554 |
|
555 |
/* Allocate new matrix and apply component transformation */ |
556 |
RMATRIX * |
557 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
558 |
{ |
559 |
int i, j, ks, kd; |
560 |
RMATRIX *dnew; |
561 |
|
562 |
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
563 |
return(NULL); |
564 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
565 |
if (dnew == NULL) |
566 |
return(NULL); |
567 |
dnew->dtype = msrc->dtype; |
568 |
for (i = dnew->nrows; i--; ) |
569 |
for (j = dnew->ncols; j--; ) |
570 |
for (kd = dnew->ncomp; kd--; ) { |
571 |
double d = 0; |
572 |
for (ks = msrc->ncomp; ks--; ) |
573 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
574 |
rmx_lval(dnew,i,j,kd) = d; |
575 |
} |
576 |
return(dnew); |
577 |
} |
578 |
|
579 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
580 |
RMATRIX * |
581 |
rmx_from_cmatrix(const CMATRIX *cm) |
582 |
{ |
583 |
int i, j; |
584 |
RMATRIX *dnew; |
585 |
|
586 |
if (cm == NULL) |
587 |
return(NULL); |
588 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
589 |
if (dnew == NULL) |
590 |
return(NULL); |
591 |
dnew->dtype = DTfloat; |
592 |
for (i = dnew->nrows; i--; ) |
593 |
for (j = dnew->ncols; j--; ) { |
594 |
const COLORV *cv = cm_lval(cm,i,j); |
595 |
rmx_lval(dnew,i,j,0) = cv[0]; |
596 |
rmx_lval(dnew,i,j,1) = cv[1]; |
597 |
rmx_lval(dnew,i,j,2) = cv[2]; |
598 |
} |
599 |
return(dnew); |
600 |
} |
601 |
|
602 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
603 |
CMATRIX * |
604 |
cm_from_rmatrix(const RMATRIX *rm) |
605 |
{ |
606 |
int i, j; |
607 |
CMATRIX *cnew; |
608 |
|
609 |
if (rm == NULL || rm->ncomp != 3) |
610 |
return(NULL); |
611 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
612 |
if (cnew == NULL) |
613 |
return(NULL); |
614 |
for (i = cnew->nrows; i--; ) |
615 |
for (j = cnew->ncols; j--; ) { |
616 |
COLORV *cv = cm_lval(cnew,i,j); |
617 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
618 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
619 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
620 |
} |
621 |
return(cnew); |
622 |
} |