1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.35 2019/08/14 18:20:02 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) |
32 |
return(NULL); |
33 |
dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n; |
34 |
dnew->dtype = DTdouble; |
35 |
dnew->swapin = 0; |
36 |
dnew->info = NULL; |
37 |
return(dnew); |
38 |
} |
39 |
|
40 |
/* Free a RMATRIX array */ |
41 |
void |
42 |
rmx_free(RMATRIX *rm) |
43 |
{ |
44 |
if (!rm) return; |
45 |
if (rm->info) |
46 |
free(rm->info); |
47 |
free(rm); |
48 |
} |
49 |
|
50 |
/* Resolve data type based on two input types (returns 0 for mismatch) */ |
51 |
int |
52 |
rmx_newtype(int dtyp1, int dtyp2) |
53 |
{ |
54 |
if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) | |
55 |
(dtyp2==DTxyze) | (dtyp2==DTrgbe) |
56 |
&& dtyp1 != dtyp2) |
57 |
return(0); |
58 |
if (dtyp1 < dtyp2) |
59 |
return(dtyp1); |
60 |
return(dtyp2); |
61 |
} |
62 |
|
63 |
/* Append header information associated with matrix data */ |
64 |
int |
65 |
rmx_addinfo(RMATRIX *rm, const char *info) |
66 |
{ |
67 |
if (!rm || !info || !*info) |
68 |
return(0); |
69 |
if (!rm->info) { |
70 |
rm->info = (char *)malloc(strlen(info)+1); |
71 |
if (rm->info) rm->info[0] = '\0'; |
72 |
} else |
73 |
rm->info = (char *)realloc(rm->info, |
74 |
strlen(rm->info)+strlen(info)+1); |
75 |
if (!rm->info) |
76 |
return(0); |
77 |
strcat(rm->info, info); |
78 |
return(1); |
79 |
} |
80 |
|
81 |
static int |
82 |
get_dminfo(char *s, void *p) |
83 |
{ |
84 |
RMATRIX *ip = (RMATRIX *)p; |
85 |
char fmt[MAXFMTLEN]; |
86 |
int i; |
87 |
|
88 |
if (headidval(fmt, s)) |
89 |
return(0); |
90 |
if (!strncmp(s, "NCOMP=", 6)) { |
91 |
ip->ncomp = atoi(s+6); |
92 |
return(0); |
93 |
} |
94 |
if (!strncmp(s, "NROWS=", 6)) { |
95 |
ip->nrows = atoi(s+6); |
96 |
return(0); |
97 |
} |
98 |
if (!strncmp(s, "NCOLS=", 6)) { |
99 |
ip->ncols = atoi(s+6); |
100 |
return(0); |
101 |
} |
102 |
if ((i = isbigendian(s)) >= 0) { |
103 |
ip->swapin = (nativebigendian() != i); |
104 |
return(0); |
105 |
} |
106 |
if (!formatval(fmt, s)) { |
107 |
rmx_addinfo(ip, s); |
108 |
return(0); |
109 |
} |
110 |
for (i = 1; i < DTend; i++) |
111 |
if (!strcmp(fmt, cm_fmt_id[i])) { |
112 |
ip->dtype = i; |
113 |
return(0); |
114 |
} |
115 |
return(-1); |
116 |
} |
117 |
|
118 |
static int |
119 |
rmx_load_ascii(RMATRIX *rm, FILE *fp) |
120 |
{ |
121 |
int i, j, k; |
122 |
|
123 |
for (i = 0; i < rm->nrows; i++) |
124 |
for (j = 0; j < rm->ncols; j++) |
125 |
for (k = 0; k < rm->ncomp; k++) |
126 |
if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
127 |
return(0); |
128 |
return(1); |
129 |
} |
130 |
|
131 |
static int |
132 |
rmx_load_float(RMATRIX *rm, FILE *fp) |
133 |
{ |
134 |
int i, j, k; |
135 |
float val[100]; |
136 |
|
137 |
if (rm->ncomp > 100) { |
138 |
fputs("Unsupported # components in rmx_load_float()\n", stderr); |
139 |
exit(1); |
140 |
} |
141 |
for (i = 0; i < rm->nrows; i++) |
142 |
for (j = 0; j < rm->ncols; j++) { |
143 |
if (getbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
144 |
return(0); |
145 |
if (rm->swapin) |
146 |
swap32((char *)val, rm->ncomp); |
147 |
for (k = rm->ncomp; k--; ) |
148 |
rmx_lval(rm,i,j,k) = val[k]; |
149 |
} |
150 |
return(1); |
151 |
} |
152 |
|
153 |
static int |
154 |
rmx_load_double(RMATRIX *rm, FILE *fp) |
155 |
{ |
156 |
int i, j; |
157 |
|
158 |
for (i = 0; i < rm->nrows; i++) |
159 |
for (j = 0; j < rm->ncols; j++) { |
160 |
if (getbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp) |
161 |
return(0); |
162 |
if (rm->swapin) |
163 |
swap64((char *)&rmx_lval(rm,i,j,0), rm->ncomp); |
164 |
} |
165 |
return(1); |
166 |
} |
167 |
|
168 |
static int |
169 |
rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
170 |
{ |
171 |
COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
172 |
int i, j; |
173 |
|
174 |
if (!scan) |
175 |
return(0); |
176 |
for (i = 0; i < rm->nrows; i++) { |
177 |
if (freadscan(scan, rm->ncols, fp) < 0) { |
178 |
free(scan); |
179 |
return(0); |
180 |
} |
181 |
for (j = rm->ncols; j--; ) { |
182 |
rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
183 |
rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
184 |
rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
185 |
} |
186 |
} |
187 |
free(scan); |
188 |
return(1); |
189 |
} |
190 |
|
191 |
/* Load matrix from supported file type */ |
192 |
RMATRIX * |
193 |
rmx_load(const char *inspec) |
194 |
{ |
195 |
FILE *fp = stdin; |
196 |
RMATRIX dinfo; |
197 |
RMATRIX *dnew; |
198 |
|
199 |
if (!inspec) { /* reading from stdin? */ |
200 |
inspec = "<stdin>"; |
201 |
SET_FILE_BINARY(stdin); |
202 |
} else if (inspec[0] == '!') { |
203 |
if (!(fp = popen(inspec+1, "r"))) |
204 |
return(NULL); |
205 |
SET_FILE_BINARY(stdin); |
206 |
} else { |
207 |
const char *sp = inspec; /* check suffix */ |
208 |
while (*sp) |
209 |
++sp; |
210 |
while (sp > inspec && sp[-1] != '.') |
211 |
--sp; |
212 |
if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
213 |
CMATRIX *cm = cm_loadBTDF((char *)inspec); |
214 |
if (!cm) |
215 |
return(NULL); |
216 |
dnew = rmx_from_cmatrix(cm); |
217 |
cm_free(cm); |
218 |
dnew->dtype = DTascii; |
219 |
return(dnew); |
220 |
} |
221 |
/* else open it ourselves */ |
222 |
if (!(fp = fopen(inspec, "rb"))) |
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.swapin = 0; |
231 |
dinfo.info = NULL; |
232 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
233 |
fclose(fp); |
234 |
return(NULL); |
235 |
} |
236 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
237 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
238 |
fclose(fp); |
239 |
return(NULL); |
240 |
} |
241 |
if (dinfo.ncomp <= 0) |
242 |
dinfo.ncomp = 3; |
243 |
else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
244 |
dinfo.ncomp != 3) { |
245 |
fclose(fp); |
246 |
return(NULL); |
247 |
} |
248 |
} |
249 |
dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
250 |
if (!dnew) { |
251 |
fclose(fp); |
252 |
return(NULL); |
253 |
} |
254 |
dnew->info = dinfo.info; |
255 |
switch (dinfo.dtype) { |
256 |
case DTascii: |
257 |
SET_FILE_TEXT(stdin); |
258 |
if (!rmx_load_ascii(dnew, fp)) |
259 |
goto loaderr; |
260 |
dnew->dtype = DTascii; /* should leave double? */ |
261 |
break; |
262 |
case DTfloat: |
263 |
dnew->swapin = dinfo.swapin; |
264 |
if (!rmx_load_float(dnew, fp)) |
265 |
goto loaderr; |
266 |
dnew->dtype = DTfloat; |
267 |
break; |
268 |
case DTdouble: |
269 |
dnew->swapin = dinfo.swapin; |
270 |
if (!rmx_load_double(dnew, fp)) |
271 |
goto loaderr; |
272 |
dnew->dtype = DTdouble; |
273 |
break; |
274 |
case DTrgbe: |
275 |
case DTxyze: |
276 |
if (!rmx_load_rgbe(dnew, fp)) |
277 |
goto loaderr; |
278 |
dnew->dtype = dinfo.dtype; |
279 |
break; |
280 |
default: |
281 |
goto loaderr; |
282 |
} |
283 |
if (fp != stdin) { |
284 |
if (inspec[0] == '!') |
285 |
pclose(fp); |
286 |
else |
287 |
fclose(fp); |
288 |
} |
289 |
#ifdef getc_unlocked |
290 |
else |
291 |
funlockfile(fp); |
292 |
#endif |
293 |
return(dnew); |
294 |
loaderr: /* should report error? */ |
295 |
if (inspec[0] == '!') |
296 |
pclose(fp); |
297 |
else |
298 |
fclose(fp); |
299 |
rmx_free(dnew); |
300 |
return(NULL); |
301 |
} |
302 |
|
303 |
static int |
304 |
rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
305 |
{ |
306 |
const char *fmt = (rm->dtype == DTfloat) ? " %.7e" : |
307 |
(rm->dtype == DTrgbe) | (rm->dtype == DTxyze) ? " %.3e" : |
308 |
" %.15e" ; |
309 |
int i, j, k; |
310 |
|
311 |
for (i = 0; i < rm->nrows; i++) { |
312 |
for (j = 0; j < rm->ncols; j++) { |
313 |
for (k = 0; k < rm->ncomp; k++) |
314 |
fprintf(fp, fmt, rmx_lval(rm,i,j,k)); |
315 |
fputc('\t', fp); |
316 |
} |
317 |
fputc('\n', fp); |
318 |
} |
319 |
return(1); |
320 |
} |
321 |
|
322 |
static int |
323 |
rmx_write_float(const RMATRIX *rm, FILE *fp) |
324 |
{ |
325 |
int i, j, k; |
326 |
float val[100]; |
327 |
|
328 |
if (rm->ncomp > 100) { |
329 |
fputs("Unsupported # components in rmx_write_float()\n", stderr); |
330 |
exit(1); |
331 |
} |
332 |
for (i = 0; i < rm->nrows; i++) |
333 |
for (j = 0; j < rm->ncols; j++) { |
334 |
for (k = rm->ncomp; k--; ) |
335 |
val[k] = (float)rmx_lval(rm,i,j,k); |
336 |
if (putbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
337 |
return(0); |
338 |
} |
339 |
return(1); |
340 |
} |
341 |
|
342 |
static int |
343 |
rmx_write_double(const RMATRIX *rm, FILE *fp) |
344 |
{ |
345 |
int i, j; |
346 |
|
347 |
for (i = 0; i < rm->nrows; i++) |
348 |
for (j = 0; j < rm->ncols; j++) |
349 |
if (putbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp) |
350 |
return(0); |
351 |
return(1); |
352 |
} |
353 |
|
354 |
static int |
355 |
rmx_write_rgbe(const RMATRIX *rm, FILE *fp) |
356 |
{ |
357 |
COLR *scan = (COLR *)malloc(sizeof(COLR)*rm->ncols); |
358 |
int i, j; |
359 |
|
360 |
if (!scan) |
361 |
return(0); |
362 |
for (i = 0; i < rm->nrows; i++) { |
363 |
for (j = rm->ncols; j--; ) |
364 |
setcolr(scan[j], rmx_lval(rm,i,j,0), |
365 |
rmx_lval(rm,i,j,1), |
366 |
rmx_lval(rm,i,j,2) ); |
367 |
if (fwritecolrs(scan, rm->ncols, fp) < 0) { |
368 |
free(scan); |
369 |
return(0); |
370 |
} |
371 |
} |
372 |
free(scan); |
373 |
return(1); |
374 |
} |
375 |
|
376 |
/* Write matrix to file type indicated by dtype */ |
377 |
int |
378 |
rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
379 |
{ |
380 |
RMATRIX *mydm = NULL; |
381 |
int ok = 1; |
382 |
|
383 |
if (!rm | !fp) |
384 |
return(0); |
385 |
#ifdef getc_unlocked |
386 |
flockfile(fp); |
387 |
#endif |
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) |
408 |
return(0); |
409 |
rm = mydm; |
410 |
} |
411 |
if ((dtype == DTfloat) | (dtype == DTdouble)) |
412 |
fputendian(fp); /* important to record */ |
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 |
if (mydm) |
438 |
rmx_free(mydm); |
439 |
return(ok); |
440 |
} |
441 |
|
442 |
/* Allocate and assign square identity matrix with n components */ |
443 |
RMATRIX * |
444 |
rmx_identity(const int dim, const int n) |
445 |
{ |
446 |
RMATRIX *rid = rmx_alloc(dim, dim, n); |
447 |
int i, k; |
448 |
|
449 |
if (!rid) |
450 |
return(NULL); |
451 |
memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim); |
452 |
for (i = dim; i--; ) |
453 |
for (k = n; k--; ) |
454 |
rmx_lval(rid,i,i,k) = 1; |
455 |
return(rid); |
456 |
} |
457 |
|
458 |
/* Duplicate the given matrix */ |
459 |
RMATRIX * |
460 |
rmx_copy(const RMATRIX *rm) |
461 |
{ |
462 |
RMATRIX *dnew; |
463 |
|
464 |
if (!rm) |
465 |
return(NULL); |
466 |
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
467 |
if (!dnew) |
468 |
return(NULL); |
469 |
rmx_addinfo(dnew, rm->info); |
470 |
dnew->dtype = rm->dtype; |
471 |
memcpy(dnew->mtx, rm->mtx, |
472 |
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
473 |
return(dnew); |
474 |
} |
475 |
|
476 |
/* Allocate and assign transposed matrix */ |
477 |
RMATRIX * |
478 |
rmx_transpose(const RMATRIX *rm) |
479 |
{ |
480 |
RMATRIX *dnew; |
481 |
int i, j, k; |
482 |
|
483 |
if (!rm) |
484 |
return(0); |
485 |
if ((rm->nrows == 1) | (rm->ncols == 1)) { |
486 |
dnew = rmx_copy(rm); |
487 |
if (!dnew) |
488 |
return(NULL); |
489 |
dnew->nrows = rm->ncols; |
490 |
dnew->ncols = rm->nrows; |
491 |
return(dnew); |
492 |
} |
493 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
494 |
if (!dnew) |
495 |
return(NULL); |
496 |
if (rm->info) { |
497 |
rmx_addinfo(dnew, rm->info); |
498 |
rmx_addinfo(dnew, "Transposed rows and columns\n"); |
499 |
} |
500 |
dnew->dtype = rm->dtype; |
501 |
for (i = dnew->nrows; i--; ) |
502 |
for (j = dnew->ncols; j--; ) |
503 |
for (k = dnew->ncomp; k--; ) |
504 |
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
505 |
return(dnew); |
506 |
} |
507 |
|
508 |
/* Multiply (concatenate) two matrices and allocate the result */ |
509 |
RMATRIX * |
510 |
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
511 |
{ |
512 |
RMATRIX *mres; |
513 |
int i, j, k, h; |
514 |
|
515 |
if (!m1 | !m2 || (m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
516 |
return(NULL); |
517 |
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
518 |
if (!mres) |
519 |
return(NULL); |
520 |
i = rmx_newtype(m1->dtype, m2->dtype); |
521 |
if (i) |
522 |
mres->dtype = i; |
523 |
else |
524 |
rmx_addinfo(mres, rmx_mismatch_warn); |
525 |
for (i = mres->nrows; i--; ) |
526 |
for (j = mres->ncols; j--; ) |
527 |
for (k = mres->ncomp; k--; ) { |
528 |
long double d = 0; |
529 |
for (h = m1->ncols; h--; ) |
530 |
d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k); |
531 |
rmx_lval(mres,i,j,k) = (double)d; |
532 |
} |
533 |
return(mres); |
534 |
} |
535 |
|
536 |
/* Element-wise multiplication (or division) of m2 into m1 */ |
537 |
int |
538 |
rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide) |
539 |
{ |
540 |
int zeroDivides = 0; |
541 |
int i, j, k; |
542 |
|
543 |
if (!m1 | !m2 || (m1->ncols != m2->ncols) | (m1->nrows != m2->nrows)) |
544 |
return(0); |
545 |
if ((m2->ncomp > 1) & (m2->ncomp != m1->ncomp)) |
546 |
return(0); |
547 |
i = rmx_newtype(m1->dtype, m2->dtype); |
548 |
if (i) |
549 |
m1->dtype = i; |
550 |
else |
551 |
rmx_addinfo(m1, rmx_mismatch_warn); |
552 |
for (i = m1->nrows; i--; ) |
553 |
for (j = m1->ncols; j--; ) |
554 |
if (divide) { |
555 |
double d; |
556 |
if (m2->ncomp == 1) { |
557 |
d = rmx_lval(m2,i,j,0); |
558 |
if (d == 0) { |
559 |
++zeroDivides; |
560 |
for (k = m1->ncomp; k--; ) |
561 |
rmx_lval(m1,i,j,k) = 0; |
562 |
} else { |
563 |
d = 1./d; |
564 |
for (k = m1->ncomp; k--; ) |
565 |
rmx_lval(m1,i,j,k) *= d; |
566 |
} |
567 |
} else |
568 |
for (k = m1->ncomp; k--; ) { |
569 |
d = rmx_lval(m2,i,j,k); |
570 |
if (d == 0) { |
571 |
++zeroDivides; |
572 |
rmx_lval(m1,i,j,k) = 0; |
573 |
} else |
574 |
rmx_lval(m1,i,j,k) /= d; |
575 |
} |
576 |
} else { |
577 |
if (m2->ncomp == 1) { |
578 |
const double d = rmx_lval(m2,i,j,0); |
579 |
for (k = m1->ncomp; k--; ) |
580 |
rmx_lval(m1,i,j,k) *= d; |
581 |
} else |
582 |
for (k = m1->ncomp; k--; ) |
583 |
rmx_lval(m1,i,j,k) *= rmx_lval(m2,i,j,k); |
584 |
} |
585 |
if (zeroDivides) { |
586 |
rmx_addinfo(m1, "WARNING: zero divide(s) corrupted results\n"); |
587 |
errno = ERANGE; |
588 |
} |
589 |
return(1); |
590 |
} |
591 |
|
592 |
/* Sum second matrix into first, applying scale factor beforehand */ |
593 |
int |
594 |
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
595 |
{ |
596 |
double *mysf = NULL; |
597 |
int i, j, k; |
598 |
|
599 |
if (!msum | !madd || |
600 |
(msum->nrows != madd->nrows) | |
601 |
(msum->ncols != madd->ncols) | |
602 |
(msum->ncomp != madd->ncomp)) |
603 |
return(0); |
604 |
if (!sf) { |
605 |
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
606 |
if (!mysf) |
607 |
return(0); |
608 |
for (k = msum->ncomp; k--; ) |
609 |
mysf[k] = 1; |
610 |
sf = mysf; |
611 |
} |
612 |
i = rmx_newtype(msum->dtype, madd->dtype); |
613 |
if (i) |
614 |
msum->dtype = i; |
615 |
else |
616 |
rmx_addinfo(msum, rmx_mismatch_warn); |
617 |
for (i = msum->nrows; i--; ) |
618 |
for (j = msum->ncols; j--; ) |
619 |
for (k = msum->ncomp; k--; ) |
620 |
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
621 |
if (mysf) |
622 |
free(mysf); |
623 |
return(1); |
624 |
} |
625 |
|
626 |
/* Scale the given matrix by the indicated scalar component vector */ |
627 |
int |
628 |
rmx_scale(RMATRIX *rm, const double sf[]) |
629 |
{ |
630 |
int i, j, k; |
631 |
|
632 |
if (!rm | !sf) |
633 |
return(0); |
634 |
for (i = rm->nrows; i--; ) |
635 |
for (j = rm->ncols; j--; ) |
636 |
for (k = rm->ncomp; k--; ) |
637 |
rmx_lval(rm,i,j,k) *= sf[k]; |
638 |
|
639 |
if (rm->info) |
640 |
rmx_addinfo(rm, "Applied scalar\n"); |
641 |
return(1); |
642 |
} |
643 |
|
644 |
/* Allocate new matrix and apply component transformation */ |
645 |
RMATRIX * |
646 |
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
647 |
{ |
648 |
int i, j, ks, kd; |
649 |
RMATRIX *dnew; |
650 |
|
651 |
if (!msrc | (n <= 0) | !cmat) |
652 |
return(NULL); |
653 |
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
654 |
if (!dnew) |
655 |
return(NULL); |
656 |
if (msrc->info) { |
657 |
char buf[128]; |
658 |
sprintf(buf, "Applied %dx%d matrix transform\n", |
659 |
dnew->ncomp, msrc->ncomp); |
660 |
rmx_addinfo(dnew, msrc->info); |
661 |
rmx_addinfo(dnew, buf); |
662 |
} |
663 |
dnew->dtype = msrc->dtype; |
664 |
for (i = dnew->nrows; i--; ) |
665 |
for (j = dnew->ncols; j--; ) |
666 |
for (kd = dnew->ncomp; kd--; ) { |
667 |
double d = 0; |
668 |
for (ks = msrc->ncomp; ks--; ) |
669 |
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
670 |
rmx_lval(dnew,i,j,kd) = d; |
671 |
} |
672 |
return(dnew); |
673 |
} |
674 |
|
675 |
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
676 |
RMATRIX * |
677 |
rmx_from_cmatrix(const CMATRIX *cm) |
678 |
{ |
679 |
int i, j; |
680 |
RMATRIX *dnew; |
681 |
|
682 |
if (!cm) |
683 |
return(NULL); |
684 |
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
685 |
if (!dnew) |
686 |
return(NULL); |
687 |
dnew->dtype = DTfloat; |
688 |
for (i = dnew->nrows; i--; ) |
689 |
for (j = dnew->ncols; j--; ) { |
690 |
const COLORV *cv = cm_lval(cm,i,j); |
691 |
rmx_lval(dnew,i,j,0) = cv[0]; |
692 |
rmx_lval(dnew,i,j,1) = cv[1]; |
693 |
rmx_lval(dnew,i,j,2) = cv[2]; |
694 |
} |
695 |
return(dnew); |
696 |
} |
697 |
|
698 |
/* Convert general matrix to newly allocated CMATRIX buffer */ |
699 |
CMATRIX * |
700 |
cm_from_rmatrix(const RMATRIX *rm) |
701 |
{ |
702 |
int i, j; |
703 |
CMATRIX *cnew; |
704 |
|
705 |
if (!rm || rm->ncomp != 3) |
706 |
return(NULL); |
707 |
cnew = cm_alloc(rm->nrows, rm->ncols); |
708 |
if (!cnew) |
709 |
return(NULL); |
710 |
for (i = cnew->nrows; i--; ) |
711 |
for (j = cnew->ncols; j--; ) { |
712 |
COLORV *cv = cm_lval(cnew,i,j); |
713 |
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
714 |
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
715 |
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
716 |
} |
717 |
return(cnew); |
718 |
} |