1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.25 2017/08/28 15:59:46 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 <errno.h> |
13 |
#include "rtio.h" |
14 |
#include "platform.h" |
15 |
#include "resolu.h" |
16 |
#include "paths.h" |
17 |
#include "rmatrix.h" |
18 |
|
19 |
static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n"; |
20 |
|
21 |
/* Allocate a nr x nc matrix with n components */ |
22 |
RMATRIX * |
23 |
rmx_alloc(int nr, int nc, int n) |
24 |
{ |
25 |
RMATRIX *dnew; |
26 |
|
27 |
if ((nr <= 0) | (nc <= 0) | (n <= 0)) |
28 |
return(NULL); |
29 |
dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) + |
30 |
sizeof(dnew->mtx[0])*(n*nr*nc)); |
31 |
if (dnew == NULL) |
32 |
return(NULL); |
33 |
dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n; |
34 |
dnew->dtype = DTdouble; |
35 |
dnew->info = NULL; |
36 |
return(dnew); |
37 |
} |
38 |
|
39 |
/* Free a RMATRIX array */ |
40 |
void |
41 |
rmx_free(RMATRIX *rm) |
42 |
{ |
43 |
if (!rm) return; |
44 |
if (rm->info) |
45 |
free(rm->info); |
46 |
free(rm); |
47 |
} |
48 |
|
49 |
/* Resolve data type based on two input types (returns 0 for mismatch) */ |
50 |
int |
51 |
rmx_newtype(int dtyp1, int dtyp2) |
52 |
{ |
53 |
if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) | |
54 |
(dtyp2==DTxyze) | (dtyp2==DTrgbe) |
55 |
&& dtyp1 != dtyp2) |
56 |
return(0); |
57 |
if (dtyp1 < dtyp2) |
58 |
return(dtyp1); |
59 |
return(dtyp2); |
60 |
} |
61 |
|
62 |
/* Append header information associated with matrix data */ |
63 |
int |
64 |
rmx_addinfo(RMATRIX *rm, const char *info) |
65 |
{ |
66 |
if (!info || !*info) |
67 |
return(0); |
68 |
if (!rm->info) { |
69 |
rm->info = (char *)malloc(strlen(info)+1); |
70 |
if (rm->info) rm->info[0] = '\0'; |
71 |
} else |
72 |
rm->info = (char *)realloc(rm->info, |
73 |
strlen(rm->info)+strlen(info)+1); |
74 |
if (!rm->info) |
75 |
return(0); |
76 |
strcat(rm->info, info); |
77 |
return(1); |
78 |
} |
79 |
|
80 |
static int |
81 |
get_dminfo(char *s, void *p) |
82 |
{ |
83 |
RMATRIX *ip = (RMATRIX *)p; |
84 |
char fmt[64]; |
85 |
int i; |
86 |
|
87 |
if (headidval(fmt, s)) |
88 |
return(0); |
89 |
if (!strncmp(s, "NCOMP=", 6)) { |
90 |
ip->ncomp = atoi(s+6); |
91 |
return(0); |
92 |
} |
93 |
if (!strncmp(s, "NROWS=", 6)) { |
94 |
ip->nrows = atoi(s+6); |
95 |
return(0); |
96 |
} |
97 |
if (!strncmp(s, "NCOLS=", 6)) { |
98 |
ip->ncols = atoi(s+6); |
99 |
return(0); |
100 |
} |
101 |
if (!formatval(fmt, s)) { |
102 |
rmx_addinfo(ip, s); |
103 |
return(0); |
104 |
} |
105 |
for (i = 1; i < DTend; i++) |
106 |
if (!strcmp(fmt, cm_fmt_id[i])) { |
107 |
ip->dtype = i; |
108 |
return(0); |
109 |
} |
110 |
return(-1); |
111 |
} |
112 |
|
113 |
static int |
114 |
rmx_load_ascii(RMATRIX *rm, FILE *fp) |
115 |
{ |
116 |
int i, j, k; |
117 |
|
118 |
for (i = 0; i < rm->nrows; i++) |
119 |
for (j = 0; j < rm->ncols; j++) |
120 |
for (k = 0; k < rm->ncomp; k++) |
121 |
if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
122 |
return(0); |
123 |
return(1); |
124 |
} |
125 |
|
126 |
static int |
127 |
rmx_load_float(RMATRIX *rm, FILE *fp) |
128 |
{ |
129 |
int i, j, k; |
130 |
float val[100]; |
131 |
|
132 |
if (rm->ncomp > 100) { |
133 |
fputs("Unsupported # components in rmx_load_float()\n", stderr); |
134 |
exit(1); |
135 |
} |
136 |
for (i = 0; i < rm->nrows; i++) |
137 |
for (j = 0; j < rm->ncols; j++) { |
138 |
if (getbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
139 |
return(0); |
140 |
for (k = rm->ncomp; k--; ) |
141 |
rmx_lval(rm,i,j,k) = val[k]; |
142 |
} |
143 |
return(1); |
144 |
} |
145 |
|
146 |
static int |
147 |
rmx_load_double(RMATRIX *rm, FILE *fp) |
148 |
{ |
149 |
int i, j; |
150 |
|
151 |
for (i = 0; i < rm->nrows; i++) |
152 |
for (j = 0; j < rm->ncols; j++) |
153 |
if (getbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp) |
154 |
return(0); |
155 |
return(1); |
156 |
} |
157 |
|
158 |
static int |
159 |
rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
160 |
{ |
161 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
162 |
int i, j; |
163 |
|
164 |
if (scan == NULL) |
165 |
return(0); |
166 |
for (i = 0; i < rm->nrows; i++) { |
167 |
if (freadscan(scan, rm->ncols, fp) < 0) { |
168 |
free(scan); |
169 |
return(0); |
170 |
} |
171 |
for (j = rm->ncols; j--; ) { |
172 |
rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
173 |
rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
174 |
rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
175 |
} |
176 |
} |
177 |
free(scan); |
178 |
return(1); |
179 |
} |
180 |
|
181 |
/* Load matrix from supported file type */ |
182 |
RMATRIX * |
183 |
rmx_load(const char *inspec) |
184 |
{ |
185 |
FILE *fp = stdin; |
186 |
RMATRIX dinfo; |
187 |
RMATRIX *dnew; |
188 |
|
189 |
if (inspec == NULL) { /* reading from stdin? */ |
190 |
inspec = "<stdin>"; |
191 |
SET_FILE_BINARY(stdin); |
192 |
} else if (inspec[0] == '!') { |
193 |
if ((fp = popen(inspec+1, "r")) == NULL) |
194 |
return(NULL); |
195 |
SET_FILE_BINARY(stdin); |
196 |
} else { |
197 |
const char *sp = inspec; /* check suffix */ |
198 |
while (*sp) |
199 |
++sp; |
200 |
while (sp > inspec && sp[-1] != '.') |
201 |
--sp; |
202 |
if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
203 |
CMATRIX *cm = cm_loadBTDF((char *)inspec); |
204 |
if (cm == NULL) |
205 |
return(NULL); |
206 |
dnew = rmx_from_cmatrix(cm); |
207 |
cm_free(cm); |
208 |
dnew->dtype = DTascii; |
209 |
return(dnew); |
210 |
} |
211 |
/* else open it ourselves */ |
212 |
if ((fp = fopen(inspec, "rb")) == NULL) |
213 |
return(NULL); |
214 |
} |
215 |
#ifdef getc_unlocked |
216 |
flockfile(fp); |
217 |
#endif |
218 |
dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0; |
219 |
dinfo.dtype = DTascii; /* assumed w/o FORMAT */ |
220 |
dinfo.info = NULL; |
221 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
222 |
fclose(fp); |
223 |
return(NULL); |
224 |
} |
225 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
226 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
227 |
fclose(fp); |
228 |
return(NULL); |
229 |
} |
230 |
if (dinfo.ncomp <= 0) |
231 |
dinfo.ncomp = 3; |
232 |
else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
233 |
dinfo.ncomp != 3) { |
234 |
fclose(fp); |
235 |
return(NULL); |
236 |
} |
237 |
} |
238 |
dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
239 |
if (dnew == NULL) { |
240 |
fclose(fp); |
241 |
return(NULL); |
242 |
} |
243 |
dnew->info = dinfo.info; |
244 |
switch (dinfo.dtype) { |
245 |
case DTascii: |
246 |
SET_FILE_TEXT(stdin); |
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 |
if (inspec[0] == '!') |
272 |
pclose(fp); |
273 |
else |
274 |
fclose(fp); |
275 |
} |
276 |
#ifdef getc_unlocked |
277 |
else |
278 |
funlockfile(fp); |
279 |
#endif |
280 |
return(dnew); |
281 |
loaderr: /* should report error? */ |
282 |
if (inspec[0] == '!') |
283 |
pclose(fp); |
284 |
else |
285 |
fclose(fp); |
286 |
rmx_free(dnew); |
287 |
return(NULL); |
288 |
} |
289 |
|
290 |
static int |
291 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
292 |
{ |
293 |
int i, j, k; |
294 |
|
295 |
for (i = 0; i < rm->nrows; i++) { |
296 |
for (j = 0; j < rm->ncols; j++) { |
297 |
for (k = 0; k < rm->ncomp; k++) |
298 |
fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
299 |
fputc('\t', fp); |
300 |
} |
301 |
fputc('\n', fp); |
302 |
} |
303 |
return(1); |
304 |
} |
305 |
|
306 |
static int |
307 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
308 |
{ |
309 |
int i, j, k; |
310 |
float val[100]; |
311 |
|
312 |
if (rm->ncomp > 100) { |
313 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
314 |
exit(1); |
315 |
} |
316 |
for (i = 0; i < rm->nrows; i++) |
317 |
for (j = 0; j < rm->ncols; j++) { |
318 |
for (k = rm->ncomp; k--; ) |
319 |
val[k] = (float)rmx_lval(rm,i,j,k); |
320 |
if (putbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
321 |
return(0); |
322 |
} |
323 |
return(1); |
324 |
} |
325 |
|
326 |
static int |
327 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
328 |
{ |
329 |
int i, j; |
330 |
|
331 |
for (i = 0; i < rm->nrows; i++) |
332 |
for (j = 0; j < rm->ncols; j++) |
333 |
if (putbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp) |
334 |
return(0); |
335 |
return(1); |
336 |
} |
337 |
|
338 |
static int |
339 |
rmx_write_rgbe(const RMATRIX *rm, FILE *fp) |
340 |
{ |
341 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
342 |
int i, j; |
343 |
|
344 |
if (scan == NULL) |
345 |
return(0); |
346 |
for (i = 0; i < rm->nrows; i++) { |
347 |
for (j = rm->ncols; j--; ) |
348 |
setcolor(scan[j], rmx_lval(rm,i,j,0), |
349 |
rmx_lval(rm,i,j,1), |
350 |
rmx_lval(rm,i,j,2) ); |
351 |
if (fwritescan(scan, rm->ncols, fp) < 0) { |
352 |
free(scan); |
353 |
return(0); |
354 |
} |
355 |
} |
356 |
free(scan); |
357 |
return(1); |
358 |
} |
359 |
|
360 |
/* Write matrix to file type indicated by dtype */ |
361 |
int |
362 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
363 |
{ |
364 |
RMATRIX *mydm = NULL; |
365 |
int ok = 1; |
366 |
|
367 |
if ((rm == NULL) | (fp == NULL)) |
368 |
return(0); |
369 |
#ifdef getc_unlocked |
370 |
flockfile(fp); |
371 |
#endif |
372 |
/* complete header */ |
373 |
if (rm->info) |
374 |
fputs(rm->info, fp); |
375 |
if (dtype == DTfromHeader) |
376 |
dtype = rm->dtype; |
377 |
else if ((dtype == DTrgbe) & (rm->dtype == DTxyze)) |
378 |
dtype = DTxyze; |
379 |
else if ((dtype == DTxyze) & (rm->dtype == DTrgbe)) |
380 |
dtype = DTrgbe; |
381 |
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
382 |
fprintf(fp, "NROWS=%d\n", rm->nrows); |
383 |
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
384 |
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
385 |
} else if (rm->ncomp != 3) { /* wrong # components? */ |
386 |
double cmtx[3]; |
387 |
if (rm->ncomp != 1) /* only convert grayscale */ |
388 |
return(0); |
389 |
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
390 |
mydm = rmx_transform(rm, 3, cmtx); |
391 |
if (mydm == NULL) |
392 |
return(0); |
393 |
rm = mydm; |
394 |
} |
395 |
fputformat((char *)cm_fmt_id[dtype], fp); |
396 |
fputc('\n', fp); |
397 |
switch (dtype) { /* write data */ |
398 |
case DTascii: |
399 |
ok = rmx_write_ascii(rm, fp); |
400 |
break; |
401 |
case DTfloat: |
402 |
ok = rmx_write_float(rm, fp); |
403 |
break; |
404 |
case DTdouble: |
405 |
ok = rmx_write_double(rm, fp); |
406 |
break; |
407 |
case DTrgbe: |
408 |
case DTxyze: |
409 |
fprtresolu(rm->ncols, rm->nrows, fp); |
410 |
ok = rmx_write_rgbe(rm, fp); |
411 |
break; |
412 |
default: |
413 |
return(0); |
414 |
} |
415 |
ok &= (fflush(fp) == 0); |
416 |
#ifdef getc_unlocked |
417 |
funlockfile(fp); |
418 |
#endif |
419 |
rmx_free(mydm); |
420 |
return(ok); |
421 |
} |
422 |
|
423 |
/* Allocate and assign square identity matrix with n components */ |
424 |
RMATRIX * |
425 |
rmx_identity(const int dim, const int n) |
426 |
{ |
427 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
428 |
int i, k; |
429 |
|
430 |
if (rid == NULL) |
431 |
return(NULL); |
432 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim); |
433 |
for (i = dim; i--; ) |
434 |
for (k = n; k--; ) |
435 |
rmx_lval(rid,i,i,k) = 1; |
436 |
return(rid); |
437 |
} |
438 |
|
439 |
/* Duplicate the given matrix */ |
440 |
RMATRIX * |
441 |
rmx_copy(const RMATRIX *rm) |
442 |
{ |
443 |
RMATRIX *dnew; |
444 |
|
445 |
if (rm == NULL) |
446 |
return(NULL); |
447 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
448 |
if (dnew == NULL) |
449 |
return(NULL); |
450 |
rmx_addinfo(dnew, rm->info); |
451 |
dnew->dtype = rm->dtype; |
452 |
memcpy(dnew->mtx, rm->mtx, |
453 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
454 |
return(dnew); |
455 |
} |
456 |
|
457 |
/* Allocate and assign transposed matrix */ |
458 |
RMATRIX * |
459 |
rmx_transpose(const RMATRIX *rm) |
460 |
{ |
461 |
RMATRIX *dnew; |
462 |
int i, j, k; |
463 |
|
464 |
if (rm == NULL) |
465 |
return(0); |
466 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
467 |
if (dnew == NULL) |
468 |
return(NULL); |
469 |
if (rm->info) { |
470 |
rmx_addinfo(dnew, rm->info); |
471 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
472 |
} |
473 |
dnew->dtype = rm->dtype; |
474 |
for (i = dnew->nrows; i--; ) |
475 |
for (j = dnew->ncols; j--; ) |
476 |
for (k = dnew->ncomp; k--; ) |
477 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
478 |
return(dnew); |
479 |
} |
480 |
|
481 |
/* Multiply (concatenate) two matrices and allocate the result */ |
482 |
RMATRIX * |
483 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
484 |
{ |
485 |
RMATRIX *mres; |
486 |
int i, j, k, h; |
487 |
|
488 |
if ((m1 == NULL) | (m2 == NULL) || |
489 |
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
490 |
return(NULL); |
491 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
492 |
if (mres == NULL) |
493 |
return(NULL); |
494 |
i = rmx_newtype(m1->dtype, m2->dtype); |
495 |
if (i) |
496 |
mres->dtype = i; |
497 |
else |
498 |
rmx_addinfo(mres, rmx_mismatch_warn); |
499 |
for (i = mres->nrows; i--; ) |
500 |
for (j = mres->ncols; j--; ) |
501 |
for (k = mres->ncomp; k--; ) { |
502 |
long double d = 0; |
503 |
for (h = m1->ncols; h--; ) |
504 |
d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k); |
505 |
rmx_lval(mres,i,j,k) = (double)d; |
506 |
} |
507 |
return(mres); |
508 |
} |
509 |
|
510 |
/* Element-wise multiplication (or division) of m2 into m1 */ |
511 |
int |
512 |
rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide) |
513 |
{ |
514 |
int zeroDivides = 0; |
515 |
int i, j, k; |
516 |
|
517 |
if ((m1 == NULL) | (m2 == NULL) || |
518 |
(m1->ncols != m2->ncols) | (m1->nrows != m2->nrows)) |
519 |
return(0); |
520 |
if ((m2->ncomp > 1) & (m2->ncomp != m1->ncomp)) |
521 |
return(0); |
522 |
i = rmx_newtype(m1->dtype, m2->dtype); |
523 |
if (i) |
524 |
m1->dtype = i; |
525 |
else |
526 |
rmx_addinfo(m1, rmx_mismatch_warn); |
527 |
for (i = m1->nrows; i--; ) |
528 |
for (j = m1->ncols; j--; ) |
529 |
if (divide) { |
530 |
double d; |
531 |
if (m2->ncomp == 1) { |
532 |
d = rmx_lval(m2,i,j,0); |
533 |
if (d == 0) { |
534 |
++zeroDivides; |
535 |
for (k = m1->ncomp; k--; ) |
536 |
rmx_lval(m1,i,j,k) = 0; |
537 |
} else { |
538 |
d = 1./d; |
539 |
for (k = m1->ncomp; k--; ) |
540 |
rmx_lval(m1,i,j,k) *= d; |
541 |
} |
542 |
} else |
543 |
for (k = m1->ncomp; k--; ) { |
544 |
d = rmx_lval(m2,i,j,k); |
545 |
if (d == 0) { |
546 |
++zeroDivides; |
547 |
rmx_lval(m1,i,j,k) = 0; |
548 |
} else |
549 |
rmx_lval(m1,i,j,k) /= d; |
550 |
} |
551 |
} else { |
552 |
if (m2->ncomp == 1) { |
553 |
const double d = rmx_lval(m2,i,j,0); |
554 |
for (k = m1->ncomp; k--; ) |
555 |
rmx_lval(m1,i,j,k) *= d; |
556 |
} else |
557 |
for (k = m1->ncomp; k--; ) |
558 |
rmx_lval(m1,i,j,k) *= rmx_lval(m2,i,j,k); |
559 |
} |
560 |
if (zeroDivides) { |
561 |
fputs("Divide by zero in rmx_elemult()\n", stderr); |
562 |
errno = ERANGE; |
563 |
} |
564 |
return(1); |
565 |
} |
566 |
|
567 |
/* Sum second matrix into first, applying scale factor beforehand */ |
568 |
int |
569 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
570 |
{ |
571 |
double *mysf = NULL; |
572 |
int i, j, k; |
573 |
|
574 |
if ((msum == NULL) | (madd == NULL) || |
575 |
(msum->nrows != madd->nrows) | |
576 |
(msum->ncols != madd->ncols) | |
577 |
(msum->ncomp != madd->ncomp)) |
578 |
return(0); |
579 |
if (sf == NULL) { |
580 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
581 |
if (mysf == NULL) |
582 |
return(0); |
583 |
for (k = msum->ncomp; k--; ) |
584 |
mysf[k] = 1; |
585 |
sf = mysf; |
586 |
} |
587 |
i = rmx_newtype(msum->dtype, madd->dtype); |
588 |
if (i) |
589 |
msum->dtype = i; |
590 |
else |
591 |
rmx_addinfo(msum, rmx_mismatch_warn); |
592 |
for (i = msum->nrows; i--; ) |
593 |
for (j = msum->ncols; j--; ) |
594 |
for (k = msum->ncomp; k--; ) |
595 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
596 |
|
597 |
free(mysf); |
598 |
return(1); |
599 |
} |
600 |
|
601 |
/* Scale the given matrix by the indicated scalar component vector */ |
602 |
int |
603 |
rmx_scale(RMATRIX *rm, const double sf[]) |
604 |
{ |
605 |
int i, j, k; |
606 |
|
607 |
if ((rm == NULL) | (sf == NULL)) |
608 |
return(0); |
609 |
for (i = rm->nrows; i--; ) |
610 |
for (j = rm->ncols; j--; ) |
611 |
for (k = rm->ncomp; k--; ) |
612 |
rmx_lval(rm,i,j,k) *= sf[k]; |
613 |
|
614 |
return(1); |
615 |
} |
616 |
|
617 |
/* Allocate new matrix and apply component transformation */ |
618 |
RMATRIX * |
619 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
620 |
{ |
621 |
int i, j, ks, kd; |
622 |
RMATRIX *dnew; |
623 |
|
624 |
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
625 |
return(NULL); |
626 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
627 |
if (dnew == NULL) |
628 |
return(NULL); |
629 |
dnew->dtype = msrc->dtype; |
630 |
for (i = dnew->nrows; i--; ) |
631 |
for (j = dnew->ncols; j--; ) |
632 |
for (kd = dnew->ncomp; kd--; ) { |
633 |
double d = 0; |
634 |
for (ks = msrc->ncomp; ks--; ) |
635 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
636 |
rmx_lval(dnew,i,j,kd) = d; |
637 |
} |
638 |
return(dnew); |
639 |
} |
640 |
|
641 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
642 |
RMATRIX * |
643 |
rmx_from_cmatrix(const CMATRIX *cm) |
644 |
{ |
645 |
int i, j; |
646 |
RMATRIX *dnew; |
647 |
|
648 |
if (cm == NULL) |
649 |
return(NULL); |
650 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
651 |
if (dnew == NULL) |
652 |
return(NULL); |
653 |
dnew->dtype = DTfloat; |
654 |
for (i = dnew->nrows; i--; ) |
655 |
for (j = dnew->ncols; j--; ) { |
656 |
const COLORV *cv = cm_lval(cm,i,j); |
657 |
rmx_lval(dnew,i,j,0) = cv[0]; |
658 |
rmx_lval(dnew,i,j,1) = cv[1]; |
659 |
rmx_lval(dnew,i,j,2) = cv[2]; |
660 |
} |
661 |
return(dnew); |
662 |
} |
663 |
|
664 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
665 |
CMATRIX * |
666 |
cm_from_rmatrix(const RMATRIX *rm) |
667 |
{ |
668 |
int i, j; |
669 |
CMATRIX *cnew; |
670 |
|
671 |
if (rm == NULL || rm->ncomp != 3) |
672 |
return(NULL); |
673 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
674 |
if (cnew == NULL) |
675 |
return(NULL); |
676 |
for (i = cnew->nrows; i--; ) |
677 |
for (j = cnew->ncols; j--; ) { |
678 |
COLORV *cv = cm_lval(cnew,i,j); |
679 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
680 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
681 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
682 |
} |
683 |
return(cnew); |
684 |
} |