ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/src/util/rmatrix.c
Revision: 2.38
Committed: Tue Sep 10 17:22:55 2019 UTC (4 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.37: +2 -2 lines
Log Message:
Info clarification

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.38 static const char RCSid[] = "$Id: rmatrix.c,v 2.37 2019/09/04 00:03:05 greg Exp $";
3 greg 2.1 #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 greg 2.25 #include <errno.h>
13 greg 2.21 #include "rtio.h"
14 schorsch 2.20 #include "platform.h"
15 greg 2.1 #include "resolu.h"
16 greg 2.19 #include "paths.h"
17 greg 2.1 #include "rmatrix.h"
18    
19 greg 2.6 static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n";
20 greg 2.1
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 greg 2.33 if (!dnew)
32 greg 2.1 return(NULL);
33     dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
34 greg 2.6 dnew->dtype = DTdouble;
35 greg 2.36 dnew->swapin = 0;
36 greg 2.5 dnew->info = NULL;
37 greg 2.1 return(dnew);
38     }
39    
40 greg 2.6 /* 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 greg 2.14 if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) |
55     (dtyp2==DTxyze) | (dtyp2==DTrgbe)
56     && dtyp1 != dtyp2)
57 greg 2.6 return(0);
58     if (dtyp1 < dtyp2)
59     return(dtyp1);
60     return(dtyp2);
61     }
62    
63 greg 2.5 /* Append header information associated with matrix data */
64     int
65     rmx_addinfo(RMATRIX *rm, const char *info)
66     {
67 greg 2.33 if (!rm || !info || !*info)
68 greg 2.5 return(0);
69 greg 2.8 if (!rm->info) {
70 greg 2.5 rm->info = (char *)malloc(strlen(info)+1);
71 greg 2.8 if (rm->info) rm->info[0] = '\0';
72     } else
73 greg 2.5 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 greg 2.1 static int
82     get_dminfo(char *s, void *p)
83     {
84 greg 2.6 RMATRIX *ip = (RMATRIX *)p;
85 greg 2.29 char fmt[MAXFMTLEN];
86 greg 2.1 int i;
87    
88 greg 2.6 if (headidval(fmt, s))
89     return(0);
90 greg 2.1 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 greg 2.35 if ((i = isbigendian(s)) >= 0) {
103     ip->swapin = (nativebigendian() != i);
104     return(0);
105     }
106 greg 2.5 if (!formatval(fmt, s)) {
107 greg 2.6 rmx_addinfo(ip, s);
108 greg 2.1 return(0);
109 greg 2.5 }
110 greg 2.1 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 greg 2.17
123 greg 2.1 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 greg 2.21 if (getbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
144 greg 2.1 return(0);
145 greg 2.35 if (rm->swapin)
146     swap32((char *)val, rm->ncomp);
147 greg 2.1 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 greg 2.26 int i, j;
157 greg 2.1
158     for (i = 0; i < rm->nrows; i++)
159 greg 2.35 for (j = 0; j < rm->ncols; j++) {
160 greg 2.26 if (getbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp)
161 greg 2.1 return(0);
162 greg 2.35 if (rm->swapin)
163     swap64((char *)&rmx_lval(rm,i,j,0), rm->ncomp);
164     }
165 greg 2.1 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 greg 2.33 if (!scan)
175 greg 2.1 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 greg 2.13 rmx_load(const char *inspec)
194 greg 2.1 {
195     FILE *fp = stdin;
196 greg 2.6 RMATRIX dinfo;
197 greg 2.1 RMATRIX *dnew;
198    
199 greg 2.33 if (!inspec) { /* reading from stdin? */
200 greg 2.13 inspec = "<stdin>";
201 greg 2.22 SET_FILE_BINARY(stdin);
202 greg 2.13 } else if (inspec[0] == '!') {
203 greg 2.33 if (!(fp = popen(inspec+1, "r")))
204 greg 2.13 return(NULL);
205 greg 2.37 SET_FILE_BINARY(fp);
206 greg 2.1 } else {
207 greg 2.13 const char *sp = inspec; /* check suffix */
208 greg 2.1 while (*sp)
209     ++sp;
210 greg 2.13 while (sp > inspec && sp[-1] != '.')
211 greg 2.1 --sp;
212     if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */
213 greg 2.13 CMATRIX *cm = cm_loadBTDF((char *)inspec);
214 greg 2.33 if (!cm)
215 greg 2.1 return(NULL);
216     dnew = rmx_from_cmatrix(cm);
217     cm_free(cm);
218 greg 2.18 dnew->dtype = DTascii;
219 greg 2.1 return(dnew);
220     }
221     /* else open it ourselves */
222 greg 2.33 if (!(fp = fopen(inspec, "rb")))
223 greg 2.1 return(NULL);
224     }
225     #ifdef getc_unlocked
226     flockfile(fp);
227     #endif
228     dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
229 greg 2.6 dinfo.dtype = DTascii; /* assumed w/o FORMAT */
230 greg 2.35 dinfo.swapin = 0;
231 greg 2.6 dinfo.info = NULL;
232 greg 2.3 if (getheader(fp, get_dminfo, &dinfo) < 0) {
233 greg 2.1 fclose(fp);
234     return(NULL);
235     }
236 greg 2.4 if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) {
237 greg 2.1 if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
238     fclose(fp);
239     return(NULL);
240     }
241 greg 2.4 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 greg 2.1 }
249     dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
250 greg 2.33 if (!dnew) {
251 greg 2.1 fclose(fp);
252     return(NULL);
253     }
254 greg 2.6 dnew->info = dinfo.info;
255 greg 2.1 switch (dinfo.dtype) {
256     case DTascii:
257 greg 2.37 SET_FILE_TEXT(fp);
258 greg 2.1 if (!rmx_load_ascii(dnew, fp))
259     goto loaderr;
260 greg 2.11 dnew->dtype = DTascii; /* should leave double? */
261 greg 2.1 break;
262     case DTfloat:
263 greg 2.35 dnew->swapin = dinfo.swapin;
264 greg 2.1 if (!rmx_load_float(dnew, fp))
265     goto loaderr;
266 greg 2.6 dnew->dtype = DTfloat;
267 greg 2.1 break;
268     case DTdouble:
269 greg 2.35 dnew->swapin = dinfo.swapin;
270 greg 2.1 if (!rmx_load_double(dnew, fp))
271     goto loaderr;
272 greg 2.6 dnew->dtype = DTdouble;
273 greg 2.1 break;
274     case DTrgbe:
275     case DTxyze:
276     if (!rmx_load_rgbe(dnew, fp))
277     goto loaderr;
278 greg 2.6 dnew->dtype = dinfo.dtype;
279 greg 2.1 break;
280     default:
281     goto loaderr;
282     }
283 greg 2.13 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 greg 2.1 return(dnew);
294     loaderr: /* should report error? */
295 greg 2.13 if (inspec[0] == '!')
296     pclose(fp);
297     else
298     fclose(fp);
299 greg 2.1 rmx_free(dnew);
300     return(NULL);
301     }
302    
303     static int
304     rmx_write_ascii(const RMATRIX *rm, FILE *fp)
305     {
306 greg 2.30 const char *fmt = (rm->dtype == DTfloat) ? " %.7e" :
307     (rm->dtype == DTrgbe) | (rm->dtype == DTxyze) ? " %.3e" :
308     " %.15e" ;
309 greg 2.1 int i, j, k;
310 greg 2.17
311 greg 2.1 for (i = 0; i < rm->nrows; i++) {
312     for (j = 0; j < rm->ncols; j++) {
313     for (k = 0; k < rm->ncomp; k++)
314 greg 2.30 fprintf(fp, fmt, rmx_lval(rm,i,j,k));
315 greg 2.1 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 greg 2.21 if (putbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
337 greg 2.1 return(0);
338     }
339     return(1);
340     }
341    
342     static int
343     rmx_write_double(const RMATRIX *rm, FILE *fp)
344     {
345 greg 2.26 int i, j;
346 greg 2.1
347     for (i = 0; i < rm->nrows; i++)
348 greg 2.26 for (j = 0; j < rm->ncols; j++)
349     if (putbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp)
350 greg 2.1 return(0);
351     return(1);
352     }
353    
354     static int
355     rmx_write_rgbe(const RMATRIX *rm, FILE *fp)
356     {
357 greg 2.27 COLR *scan = (COLR *)malloc(sizeof(COLR)*rm->ncols);
358 greg 2.1 int i, j;
359    
360 greg 2.33 if (!scan)
361 greg 2.1 return(0);
362     for (i = 0; i < rm->nrows; i++) {
363     for (j = rm->ncols; j--; )
364 greg 2.27 setcolr(scan[j], rmx_lval(rm,i,j,0),
365 greg 2.1 rmx_lval(rm,i,j,1),
366     rmx_lval(rm,i,j,2) );
367 greg 2.27 if (fwritecolrs(scan, rm->ncols, fp) < 0) {
368 greg 2.1 free(scan);
369     return(0);
370     }
371     }
372     free(scan);
373     return(1);
374     }
375    
376 greg 2.6 /* Write matrix to file type indicated by dtype */
377 greg 2.10 int
378 greg 2.1 rmx_write(const RMATRIX *rm, int dtype, FILE *fp)
379     {
380     RMATRIX *mydm = NULL;
381     int ok = 1;
382    
383 greg 2.33 if (!rm | !fp)
384 greg 2.1 return(0);
385 greg 2.17 #ifdef getc_unlocked
386     flockfile(fp);
387     #endif
388 greg 2.1 /* complete header */
389 greg 2.5 if (rm->info)
390     fputs(rm->info, fp);
391 greg 2.6 if (dtype == DTfromHeader)
392     dtype = rm->dtype;
393     else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
394     dtype = DTxyze;
395 greg 2.9 else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
396 greg 2.6 dtype = DTrgbe;
397 greg 2.1 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 greg 2.33 if (!mydm)
408 greg 2.1 return(0);
409     rm = mydm;
410     }
411 greg 2.35 if ((dtype == DTfloat) | (dtype == DTdouble))
412     fputendian(fp); /* important to record */
413 greg 2.1 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 greg 2.17 #ifdef getc_unlocked
435     funlockfile(fp);
436     #endif
437 greg 2.33 if (mydm)
438     rmx_free(mydm);
439 greg 2.10 return(ok);
440 greg 2.1 }
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 greg 2.12 int i, k;
448 greg 2.1
449 greg 2.33 if (!rid)
450 greg 2.1 return(NULL);
451 greg 2.12 memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim);
452 greg 2.1 for (i = dim; i--; )
453 greg 2.12 for (k = n; k--; )
454     rmx_lval(rid,i,i,k) = 1;
455 greg 2.1 return(rid);
456     }
457    
458     /* Duplicate the given matrix */
459     RMATRIX *
460     rmx_copy(const RMATRIX *rm)
461     {
462     RMATRIX *dnew;
463    
464 greg 2.33 if (!rm)
465 greg 2.1 return(NULL);
466     dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
467 greg 2.33 if (!dnew)
468 greg 2.1 return(NULL);
469 greg 2.5 rmx_addinfo(dnew, rm->info);
470 greg 2.6 dnew->dtype = rm->dtype;
471 greg 2.1 memcpy(dnew->mtx, rm->mtx,
472     sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols);
473     return(dnew);
474     }
475    
476 greg 2.2 /* Allocate and assign transposed matrix */
477     RMATRIX *
478     rmx_transpose(const RMATRIX *rm)
479 greg 2.1 {
480 greg 2.2 RMATRIX *dnew;
481 greg 2.1 int i, j, k;
482    
483 greg 2.33 if (!rm)
484 greg 2.1 return(0);
485 greg 2.31 if ((rm->nrows == 1) | (rm->ncols == 1)) {
486     dnew = rmx_copy(rm);
487 greg 2.33 if (!dnew)
488 greg 2.32 return(NULL);
489 greg 2.31 dnew->nrows = rm->ncols;
490     dnew->ncols = rm->nrows;
491     return(dnew);
492     }
493 greg 2.2 dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
494 greg 2.33 if (!dnew)
495 greg 2.2 return(NULL);
496 greg 2.5 if (rm->info) {
497     rmx_addinfo(dnew, rm->info);
498     rmx_addinfo(dnew, "Transposed rows and columns\n");
499     }
500 greg 2.6 dnew->dtype = rm->dtype;
501 greg 2.2 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 greg 2.1 }
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 greg 2.33 if (!m1 | !m2 || (m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows))
516 greg 2.1 return(NULL);
517     mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
518 greg 2.33 if (!mres)
519 greg 2.1 return(NULL);
520 greg 2.6 i = rmx_newtype(m1->dtype, m2->dtype);
521     if (i)
522     mres->dtype = i;
523     else
524     rmx_addinfo(mres, rmx_mismatch_warn);
525 greg 2.1 for (i = mres->nrows; i--; )
526     for (j = mres->ncols; j--; )
527 greg 2.8 for (k = mres->ncomp; k--; ) {
528 greg 2.1 long double d = 0;
529 greg 2.8 for (h = m1->ncols; h--; )
530 greg 2.24 d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k);
531 greg 2.1 rmx_lval(mres,i,j,k) = (double)d;
532     }
533     return(mres);
534     }
535    
536 greg 2.25 /* 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 greg 2.33 if (!m1 | !m2 || (m1->ncols != m2->ncols) | (m1->nrows != m2->nrows))
544 greg 2.25 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 greg 2.34 rmx_addinfo(m1, "WARNING: zero divide(s) corrupted results\n");
587 greg 2.25 errno = ERANGE;
588     }
589     return(1);
590     }
591    
592 greg 2.1 /* 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 greg 2.33 if (!msum | !madd ||
600 greg 2.1 (msum->nrows != madd->nrows) |
601     (msum->ncols != madd->ncols) |
602     (msum->ncomp != madd->ncomp))
603     return(0);
604 greg 2.33 if (!sf) {
605 greg 2.1 mysf = (double *)malloc(sizeof(double)*msum->ncomp);
606 greg 2.33 if (!mysf)
607 greg 2.1 return(0);
608     for (k = msum->ncomp; k--; )
609     mysf[k] = 1;
610     sf = mysf;
611     }
612 greg 2.6 i = rmx_newtype(msum->dtype, madd->dtype);
613     if (i)
614     msum->dtype = i;
615     else
616     rmx_addinfo(msum, rmx_mismatch_warn);
617 greg 2.1 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 greg 2.33 if (mysf)
622     free(mysf);
623 greg 2.1 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 greg 2.33 if (!rm | !sf)
633 greg 2.1 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 greg 2.28 if (rm->info)
640     rmx_addinfo(rm, "Applied scalar\n");
641 greg 2.1 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 greg 2.33 if (!msrc | (n <= 0) | !cmat)
652 greg 2.1 return(NULL);
653     dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
654 greg 2.33 if (!dnew)
655 greg 2.1 return(NULL);
656 greg 2.28 if (msrc->info) {
657     char buf[128];
658 greg 2.38 sprintf(buf, "Applied %dx%d component transform\n",
659 greg 2.28 dnew->ncomp, msrc->ncomp);
660     rmx_addinfo(dnew, msrc->info);
661     rmx_addinfo(dnew, buf);
662     }
663 greg 2.6 dnew->dtype = msrc->dtype;
664 greg 2.1 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 greg 2.33 if (!cm)
683 greg 2.1 return(NULL);
684     dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
685 greg 2.33 if (!dnew)
686 greg 2.1 return(NULL);
687 greg 2.6 dnew->dtype = DTfloat;
688 greg 2.1 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 greg 2.33 if (!rm || rm->ncomp != 3)
706 greg 2.1 return(NULL);
707     cnew = cm_alloc(rm->nrows, rm->ncols);
708 greg 2.33 if (!cnew)
709 greg 2.1 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     }