| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.4 |
static const char RCSid[] = "$Id: rmatrix.c,v 2.3 2014/07/08 16:39:41 greg Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
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/* |
| 5 |
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* General matrix operations. |
| 6 |
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*/ |
| 7 |
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| 8 |
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#include <stdio.h> |
| 9 |
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#include <stdlib.h> |
| 10 |
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#include <string.h> |
| 11 |
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#include <fcntl.h> |
| 12 |
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#include "resolu.h" |
| 13 |
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#include "rmatrix.h" |
| 14 |
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| 15 |
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typedef struct { |
| 16 |
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int nrows, ncols, ncomp; |
| 17 |
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int dtype; |
| 18 |
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} DMINFO; |
| 19 |
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| 20 |
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/* Allocate a nr x nc matrix with n components */ |
| 21 |
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RMATRIX * |
| 22 |
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rmx_alloc(int nr, int nc, int n) |
| 23 |
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{ |
| 24 |
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RMATRIX *dnew; |
| 25 |
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| 26 |
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if ((nr <= 0) | (nc <= 0) | (n <= 0)) |
| 27 |
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return(NULL); |
| 28 |
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dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) + |
| 29 |
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sizeof(dnew->mtx[0])*(n*nr*nc)); |
| 30 |
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if (dnew == NULL) |
| 31 |
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return(NULL); |
| 32 |
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dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n; |
| 33 |
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return(dnew); |
| 34 |
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} |
| 35 |
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| 36 |
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static int |
| 37 |
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get_dminfo(char *s, void *p) |
| 38 |
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{ |
| 39 |
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DMINFO *ip = (DMINFO *)p; |
| 40 |
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char fmt[32]; |
| 41 |
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int i; |
| 42 |
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| 43 |
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if (!strncmp(s, "NCOMP=", 6)) { |
| 44 |
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ip->ncomp = atoi(s+6); |
| 45 |
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return(0); |
| 46 |
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} |
| 47 |
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if (!strncmp(s, "NROWS=", 6)) { |
| 48 |
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ip->nrows = atoi(s+6); |
| 49 |
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return(0); |
| 50 |
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} |
| 51 |
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if (!strncmp(s, "NCOLS=", 6)) { |
| 52 |
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ip->ncols = atoi(s+6); |
| 53 |
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return(0); |
| 54 |
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} |
| 55 |
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if (!formatval(fmt, s)) |
| 56 |
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return(0); |
| 57 |
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for (i = 1; i < DTend; i++) |
| 58 |
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if (!strcmp(fmt, cm_fmt_id[i])) { |
| 59 |
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ip->dtype = i; |
| 60 |
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return(0); |
| 61 |
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} |
| 62 |
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return(-1); |
| 63 |
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} |
| 64 |
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| 65 |
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static int |
| 66 |
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rmx_load_ascii(RMATRIX *rm, FILE *fp) |
| 67 |
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{ |
| 68 |
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int i, j, k; |
| 69 |
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#ifdef _WIN32 |
| 70 |
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_setmode(fileno(fp), _O_TEXT); |
| 71 |
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#endif |
| 72 |
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for (i = 0; i < rm->nrows; i++) |
| 73 |
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for (j = 0; j < rm->ncols; j++) |
| 74 |
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for (k = 0; k < rm->ncomp; k++) |
| 75 |
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if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1) |
| 76 |
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return(0); |
| 77 |
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return(1); |
| 78 |
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} |
| 79 |
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| 80 |
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static int |
| 81 |
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rmx_load_float(RMATRIX *rm, FILE *fp) |
| 82 |
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{ |
| 83 |
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int i, j, k; |
| 84 |
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float val[100]; |
| 85 |
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| 86 |
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if (rm->ncomp > 100) { |
| 87 |
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fputs("Unsupported # components in rmx_load_float()\n", stderr); |
| 88 |
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exit(1); |
| 89 |
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} |
| 90 |
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for (i = 0; i < rm->nrows; i++) |
| 91 |
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for (j = 0; j < rm->ncols; j++) { |
| 92 |
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if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
| 93 |
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return(0); |
| 94 |
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for (k = rm->ncomp; k--; ) |
| 95 |
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rmx_lval(rm,i,j,k) = val[k]; |
| 96 |
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} |
| 97 |
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return(1); |
| 98 |
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} |
| 99 |
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| 100 |
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static int |
| 101 |
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rmx_load_double(RMATRIX *rm, FILE *fp) |
| 102 |
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{ |
| 103 |
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int i, j, k; |
| 104 |
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double val[100]; |
| 105 |
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| 106 |
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if (rm->ncomp > 100) { |
| 107 |
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fputs("Unsupported # components in rmx_load_double()\n", stderr); |
| 108 |
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exit(1); |
| 109 |
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} |
| 110 |
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for (i = 0; i < rm->nrows; i++) |
| 111 |
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for (j = 0; j < rm->ncols; j++) { |
| 112 |
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if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
| 113 |
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return(0); |
| 114 |
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for (k = rm->ncomp; k--; ) |
| 115 |
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rmx_lval(rm,i,j,k) = val[k]; |
| 116 |
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} |
| 117 |
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return(1); |
| 118 |
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} |
| 119 |
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| 120 |
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static int |
| 121 |
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rmx_load_rgbe(RMATRIX *rm, FILE *fp) |
| 122 |
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{ |
| 123 |
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COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
| 124 |
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int i, j; |
| 125 |
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| 126 |
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if (scan == NULL) |
| 127 |
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return(0); |
| 128 |
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for (i = 0; i < rm->nrows; i++) { |
| 129 |
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if (freadscan(scan, rm->ncols, fp) < 0) { |
| 130 |
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free(scan); |
| 131 |
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return(0); |
| 132 |
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} |
| 133 |
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for (j = rm->ncols; j--; ) { |
| 134 |
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rmx_lval(rm,i,j,0) = colval(scan[j],RED); |
| 135 |
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rmx_lval(rm,i,j,1) = colval(scan[j],GRN); |
| 136 |
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rmx_lval(rm,i,j,2) = colval(scan[j],BLU); |
| 137 |
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} |
| 138 |
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} |
| 139 |
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free(scan); |
| 140 |
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return(1); |
| 141 |
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} |
| 142 |
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| 143 |
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/* Load matrix from supported file type */ |
| 144 |
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RMATRIX * |
| 145 |
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rmx_load(const char *fname) |
| 146 |
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{ |
| 147 |
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FILE *fp = stdin; |
| 148 |
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DMINFO dinfo; |
| 149 |
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RMATRIX *dnew; |
| 150 |
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| 151 |
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if (fname == NULL) { /* reading from stdin? */ |
| 152 |
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fname = "<stdin>"; |
| 153 |
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} else { |
| 154 |
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const char *sp = fname; /* check suffix */ |
| 155 |
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while (*sp) |
| 156 |
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++sp; |
| 157 |
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while (sp > fname && sp[-1] != '.') |
| 158 |
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--sp; |
| 159 |
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if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */ |
| 160 |
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CMATRIX *cm = cm_loadBTDF((char *)fname); |
| 161 |
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if (cm == NULL) |
| 162 |
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return(NULL); |
| 163 |
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dnew = rmx_from_cmatrix(cm); |
| 164 |
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cm_free(cm); |
| 165 |
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return(dnew); |
| 166 |
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} |
| 167 |
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/* else open it ourselves */ |
| 168 |
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if ((fp = fopen(fname, "rb")) == NULL) |
| 169 |
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return(NULL); |
| 170 |
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} |
| 171 |
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#ifdef getc_unlocked |
| 172 |
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flockfile(fp); |
| 173 |
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#endif |
| 174 |
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dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0; |
| 175 |
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dinfo.dtype = DTascii; |
| 176 |
greg |
2.3 |
if (getheader(fp, get_dminfo, &dinfo) < 0) { |
| 177 |
greg |
2.1 |
fclose(fp); |
| 178 |
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return(NULL); |
| 179 |
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} |
| 180 |
greg |
2.4 |
if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) { |
| 181 |
greg |
2.1 |
if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) { |
| 182 |
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fclose(fp); |
| 183 |
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return(NULL); |
| 184 |
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} |
| 185 |
greg |
2.4 |
if (dinfo.ncomp <= 0) |
| 186 |
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dinfo.ncomp = 3; |
| 187 |
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else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) && |
| 188 |
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dinfo.ncomp != 3) { |
| 189 |
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fclose(fp); |
| 190 |
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return(NULL); |
| 191 |
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} |
| 192 |
greg |
2.1 |
} |
| 193 |
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dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp); |
| 194 |
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if (dnew == NULL) { |
| 195 |
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fclose(fp); |
| 196 |
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return(NULL); |
| 197 |
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} |
| 198 |
|
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switch (dinfo.dtype) { |
| 199 |
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case DTascii: |
| 200 |
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if (!rmx_load_ascii(dnew, fp)) |
| 201 |
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goto loaderr; |
| 202 |
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break; |
| 203 |
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case DTfloat: |
| 204 |
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if (!rmx_load_float(dnew, fp)) |
| 205 |
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goto loaderr; |
| 206 |
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break; |
| 207 |
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case DTdouble: |
| 208 |
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if (!rmx_load_double(dnew, fp)) |
| 209 |
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goto loaderr; |
| 210 |
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break; |
| 211 |
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case DTrgbe: |
| 212 |
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case DTxyze: |
| 213 |
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if (!rmx_load_rgbe(dnew, fp)) |
| 214 |
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goto loaderr; |
| 215 |
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break; |
| 216 |
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default: |
| 217 |
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goto loaderr; |
| 218 |
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} |
| 219 |
|
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if (fp != stdin) |
| 220 |
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fclose(fp); |
| 221 |
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return(dnew); |
| 222 |
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loaderr: /* should report error? */ |
| 223 |
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fclose(fp); |
| 224 |
|
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rmx_free(dnew); |
| 225 |
|
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return(NULL); |
| 226 |
|
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} |
| 227 |
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| 228 |
|
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static int |
| 229 |
|
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rmx_write_ascii(const RMATRIX *rm, FILE *fp) |
| 230 |
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{ |
| 231 |
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int i, j, k; |
| 232 |
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#ifdef _WIN32 |
| 233 |
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_setmode(fileno(fp), _O_TEXT); |
| 234 |
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#endif |
| 235 |
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for (i = 0; i < rm->nrows; i++) { |
| 236 |
|
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for (j = 0; j < rm->ncols; j++) { |
| 237 |
|
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for (k = 0; k < rm->ncomp; k++) |
| 238 |
|
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fprintf(fp, " %.15e", rmx_lval(rm,i,j,k)); |
| 239 |
|
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fputc('\t', fp); |
| 240 |
|
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} |
| 241 |
|
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fputc('\n', fp); |
| 242 |
|
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} |
| 243 |
|
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return(1); |
| 244 |
|
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} |
| 245 |
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|
| 246 |
|
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static int |
| 247 |
|
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rmx_write_float(const RMATRIX *rm, FILE *fp) |
| 248 |
|
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{ |
| 249 |
|
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int i, j, k; |
| 250 |
|
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float val[100]; |
| 251 |
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| 252 |
|
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if (rm->ncomp > 100) { |
| 253 |
|
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fputs("Unsupported # components in rmx_write_float()\n", stderr); |
| 254 |
|
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exit(1); |
| 255 |
|
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} |
| 256 |
|
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for (i = 0; i < rm->nrows; i++) |
| 257 |
|
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for (j = 0; j < rm->ncols; j++) { |
| 258 |
|
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for (k = rm->ncomp; k--; ) |
| 259 |
|
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val[k] = (float)rmx_lval(rm,i,j,k); |
| 260 |
|
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if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
| 261 |
|
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return(0); |
| 262 |
|
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} |
| 263 |
|
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return(1); |
| 264 |
|
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} |
| 265 |
|
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|
| 266 |
|
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static int |
| 267 |
|
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rmx_write_double(const RMATRIX *rm, FILE *fp) |
| 268 |
|
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{ |
| 269 |
|
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int i, j, k; |
| 270 |
|
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double val[100]; |
| 271 |
|
|
|
| 272 |
|
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if (rm->ncomp > 100) { |
| 273 |
|
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fputs("Unsupported # components in rmx_write_double()\n", stderr); |
| 274 |
|
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exit(1); |
| 275 |
|
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} |
| 276 |
|
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for (i = 0; i < rm->nrows; i++) |
| 277 |
|
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for (j = 0; j < rm->ncols; j++) { |
| 278 |
|
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for (k = rm->ncomp; k--; ) |
| 279 |
|
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val[k] = rmx_lval(rm,i,j,k); |
| 280 |
|
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if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp) |
| 281 |
|
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return(0); |
| 282 |
|
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} |
| 283 |
|
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return(1); |
| 284 |
|
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} |
| 285 |
|
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|
| 286 |
|
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static int |
| 287 |
|
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rmx_write_rgbe(const RMATRIX *rm, FILE *fp) |
| 288 |
|
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{ |
| 289 |
|
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COLOR *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols); |
| 290 |
|
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int i, j; |
| 291 |
|
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|
| 292 |
|
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if (scan == NULL) |
| 293 |
|
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return(0); |
| 294 |
|
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for (i = 0; i < rm->nrows; i++) { |
| 295 |
|
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for (j = rm->ncols; j--; ) |
| 296 |
|
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setcolor(scan[j], rmx_lval(rm,i,j,0), |
| 297 |
|
|
rmx_lval(rm,i,j,1), |
| 298 |
|
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rmx_lval(rm,i,j,2) ); |
| 299 |
|
|
if (fwritescan(scan, rm->ncols, fp) < 0) { |
| 300 |
|
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free(scan); |
| 301 |
|
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return(0); |
| 302 |
|
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} |
| 303 |
|
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} |
| 304 |
|
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free(scan); |
| 305 |
|
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return(1); |
| 306 |
|
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} |
| 307 |
|
|
|
| 308 |
|
|
/* Write matrix to file type indicated by dt */ |
| 309 |
|
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long |
| 310 |
|
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rmx_write(const RMATRIX *rm, int dtype, FILE *fp) |
| 311 |
|
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{ |
| 312 |
|
|
RMATRIX *mydm = NULL; |
| 313 |
|
|
int ok = 1; |
| 314 |
|
|
|
| 315 |
|
|
if ((rm == NULL) | (fp == NULL)) |
| 316 |
|
|
return(0); |
| 317 |
|
|
/* complete header */ |
| 318 |
|
|
if ((dtype != DTrgbe) & (dtype != DTxyze)) { |
| 319 |
|
|
fprintf(fp, "NROWS=%d\n", rm->nrows); |
| 320 |
|
|
fprintf(fp, "NCOLS=%d\n", rm->ncols); |
| 321 |
|
|
fprintf(fp, "NCOMP=%d\n", rm->ncomp); |
| 322 |
|
|
} else if (rm->ncomp != 3) { /* wrong # components? */ |
| 323 |
|
|
double cmtx[3]; |
| 324 |
|
|
if (rm->ncomp != 1) /* only convert grayscale */ |
| 325 |
|
|
return(0); |
| 326 |
|
|
cmtx[0] = cmtx[1] = cmtx[2] = 1; |
| 327 |
|
|
mydm = rmx_transform(rm, 3, cmtx); |
| 328 |
|
|
if (mydm == NULL) |
| 329 |
|
|
return(0); |
| 330 |
|
|
rm = mydm; |
| 331 |
|
|
} |
| 332 |
|
|
fputformat((char *)cm_fmt_id[dtype], fp); |
| 333 |
|
|
fputc('\n', fp); |
| 334 |
|
|
switch (dtype) { /* write data */ |
| 335 |
|
|
case DTascii: |
| 336 |
|
|
ok = rmx_write_ascii(rm, fp); |
| 337 |
|
|
break; |
| 338 |
|
|
case DTfloat: |
| 339 |
|
|
ok = rmx_write_float(rm, fp); |
| 340 |
|
|
break; |
| 341 |
|
|
case DTdouble: |
| 342 |
|
|
ok = rmx_write_double(rm, fp); |
| 343 |
|
|
break; |
| 344 |
|
|
case DTrgbe: |
| 345 |
|
|
case DTxyze: |
| 346 |
|
|
fprtresolu(rm->ncols, rm->nrows, fp); |
| 347 |
|
|
ok = rmx_write_rgbe(rm, fp); |
| 348 |
|
|
break; |
| 349 |
|
|
default: |
| 350 |
|
|
return(0); |
| 351 |
|
|
} |
| 352 |
|
|
ok &= (fflush(fp) == 0); |
| 353 |
|
|
rmx_free(mydm); |
| 354 |
|
|
return(ftell(fp) * ok); /* return # bytes written */ |
| 355 |
|
|
} |
| 356 |
|
|
|
| 357 |
|
|
/* Allocate and assign square identity matrix with n components */ |
| 358 |
|
|
RMATRIX * |
| 359 |
|
|
rmx_identity(const int dim, const int n) |
| 360 |
|
|
{ |
| 361 |
|
|
RMATRIX *rid = rmx_alloc(dim, dim, n); |
| 362 |
|
|
int i; |
| 363 |
|
|
|
| 364 |
|
|
if (rid == NULL) |
| 365 |
|
|
return(NULL); |
| 366 |
|
|
memset(rid->mtx, 0, sizeof(rid->mtx[0])*dim*dim); |
| 367 |
|
|
for (i = dim; i--; ) |
| 368 |
|
|
rmx_lval(rid,i,i,0) = 1; |
| 369 |
|
|
for (i = n; --i; ) |
| 370 |
|
|
memcpy(rid->mtx+i*(dim*dim), rid->mtx, |
| 371 |
|
|
sizeof(rid->mtx[0])*dim*dim); |
| 372 |
|
|
return(rid); |
| 373 |
|
|
} |
| 374 |
|
|
|
| 375 |
|
|
/* Duplicate the given matrix */ |
| 376 |
|
|
RMATRIX * |
| 377 |
|
|
rmx_copy(const RMATRIX *rm) |
| 378 |
|
|
{ |
| 379 |
|
|
RMATRIX *dnew; |
| 380 |
|
|
|
| 381 |
|
|
if (rm == NULL) |
| 382 |
|
|
return(NULL); |
| 383 |
|
|
dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp); |
| 384 |
|
|
if (dnew == NULL) |
| 385 |
|
|
return(NULL); |
| 386 |
|
|
memcpy(dnew->mtx, rm->mtx, |
| 387 |
|
|
sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols); |
| 388 |
|
|
return(dnew); |
| 389 |
|
|
} |
| 390 |
|
|
|
| 391 |
greg |
2.2 |
/* Allocate and assign transposed matrix */ |
| 392 |
|
|
RMATRIX * |
| 393 |
|
|
rmx_transpose(const RMATRIX *rm) |
| 394 |
greg |
2.1 |
{ |
| 395 |
greg |
2.2 |
RMATRIX *dnew; |
| 396 |
greg |
2.1 |
int i, j, k; |
| 397 |
|
|
|
| 398 |
|
|
if (rm == NULL) |
| 399 |
|
|
return(0); |
| 400 |
greg |
2.2 |
dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp); |
| 401 |
|
|
if (dnew == NULL) |
| 402 |
|
|
return(NULL); |
| 403 |
|
|
for (i = dnew->nrows; i--; ) |
| 404 |
|
|
for (j = dnew->ncols; j--; ) |
| 405 |
|
|
for (k = dnew->ncomp; k--; ) |
| 406 |
|
|
rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k); |
| 407 |
|
|
return(dnew); |
| 408 |
greg |
2.1 |
} |
| 409 |
|
|
|
| 410 |
|
|
/* Multiply (concatenate) two matrices and allocate the result */ |
| 411 |
|
|
RMATRIX * |
| 412 |
|
|
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2) |
| 413 |
|
|
{ |
| 414 |
|
|
RMATRIX *mres; |
| 415 |
|
|
int i, j, k, h; |
| 416 |
|
|
|
| 417 |
|
|
if ((m1 == NULL) | (m2 == NULL) || |
| 418 |
|
|
(m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows)) |
| 419 |
|
|
return(NULL); |
| 420 |
|
|
mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp); |
| 421 |
|
|
if (mres == NULL) |
| 422 |
|
|
return(NULL); |
| 423 |
|
|
for (i = mres->nrows; i--; ) |
| 424 |
|
|
for (j = mres->ncols; j--; ) |
| 425 |
|
|
for (h = m1->ncols; h--; ) { |
| 426 |
|
|
long double d = 0; |
| 427 |
|
|
for (k = mres->ncomp; k--; ) |
| 428 |
|
|
d += (long double)rmx_lval(m1,i,h,k) * |
| 429 |
|
|
(long double)rmx_lval(m2,h,j,k); |
| 430 |
|
|
rmx_lval(mres,i,j,k) = (double)d; |
| 431 |
|
|
} |
| 432 |
|
|
return(mres); |
| 433 |
|
|
} |
| 434 |
|
|
|
| 435 |
|
|
/* Sum second matrix into first, applying scale factor beforehand */ |
| 436 |
|
|
int |
| 437 |
|
|
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]) |
| 438 |
|
|
{ |
| 439 |
|
|
double *mysf = NULL; |
| 440 |
|
|
int i, j, k; |
| 441 |
|
|
|
| 442 |
|
|
if ((msum == NULL) | (madd == NULL) || |
| 443 |
|
|
(msum->nrows != madd->nrows) | |
| 444 |
|
|
(msum->ncols != madd->ncols) | |
| 445 |
|
|
(msum->ncomp != madd->ncomp)) |
| 446 |
|
|
return(0); |
| 447 |
|
|
if (sf == NULL) { |
| 448 |
|
|
mysf = (double *)malloc(sizeof(double)*msum->ncomp); |
| 449 |
|
|
if (mysf == NULL) |
| 450 |
|
|
return(0); |
| 451 |
|
|
for (k = msum->ncomp; k--; ) |
| 452 |
|
|
mysf[k] = 1; |
| 453 |
|
|
sf = mysf; |
| 454 |
|
|
} |
| 455 |
|
|
for (i = msum->nrows; i--; ) |
| 456 |
|
|
for (j = msum->ncols; j--; ) |
| 457 |
|
|
for (k = msum->ncomp; k--; ) |
| 458 |
|
|
rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k); |
| 459 |
|
|
|
| 460 |
|
|
free(mysf); |
| 461 |
|
|
return(1); |
| 462 |
|
|
} |
| 463 |
|
|
|
| 464 |
|
|
/* Scale the given matrix by the indicated scalar component vector */ |
| 465 |
|
|
int |
| 466 |
|
|
rmx_scale(RMATRIX *rm, const double sf[]) |
| 467 |
|
|
{ |
| 468 |
|
|
int i, j, k; |
| 469 |
|
|
|
| 470 |
|
|
if ((rm == NULL) | (sf == NULL)) |
| 471 |
|
|
return(0); |
| 472 |
|
|
for (i = rm->nrows; i--; ) |
| 473 |
|
|
for (j = rm->ncols; j--; ) |
| 474 |
|
|
for (k = rm->ncomp; k--; ) |
| 475 |
|
|
rmx_lval(rm,i,j,k) *= sf[k]; |
| 476 |
|
|
|
| 477 |
|
|
return(1); |
| 478 |
|
|
} |
| 479 |
|
|
|
| 480 |
|
|
/* Allocate new matrix and apply component transformation */ |
| 481 |
|
|
RMATRIX * |
| 482 |
|
|
rmx_transform(const RMATRIX *msrc, int n, const double cmat[]) |
| 483 |
|
|
{ |
| 484 |
|
|
int i, j, ks, kd; |
| 485 |
|
|
RMATRIX *dnew; |
| 486 |
|
|
|
| 487 |
|
|
if ((msrc == NULL) | (n <= 0) | (cmat == NULL)) |
| 488 |
|
|
return(NULL); |
| 489 |
|
|
dnew = rmx_alloc(msrc->nrows, msrc->ncols, n); |
| 490 |
|
|
if (dnew == NULL) |
| 491 |
|
|
return(NULL); |
| 492 |
|
|
for (i = dnew->nrows; i--; ) |
| 493 |
|
|
for (j = dnew->ncols; j--; ) |
| 494 |
|
|
for (kd = dnew->ncomp; kd--; ) { |
| 495 |
|
|
double d = 0; |
| 496 |
|
|
for (ks = msrc->ncomp; ks--; ) |
| 497 |
|
|
d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks); |
| 498 |
|
|
rmx_lval(dnew,i,j,kd) = d; |
| 499 |
|
|
} |
| 500 |
|
|
return(dnew); |
| 501 |
|
|
} |
| 502 |
|
|
|
| 503 |
|
|
/* Convert a color matrix to newly allocated RMATRIX buffer */ |
| 504 |
|
|
RMATRIX * |
| 505 |
|
|
rmx_from_cmatrix(const CMATRIX *cm) |
| 506 |
|
|
{ |
| 507 |
|
|
int i, j; |
| 508 |
|
|
RMATRIX *dnew; |
| 509 |
|
|
|
| 510 |
|
|
if (cm == NULL) |
| 511 |
|
|
return(NULL); |
| 512 |
|
|
dnew = rmx_alloc(cm->nrows, cm->ncols, 3); |
| 513 |
|
|
if (dnew == NULL) |
| 514 |
|
|
return(NULL); |
| 515 |
|
|
for (i = dnew->nrows; i--; ) |
| 516 |
|
|
for (j = dnew->ncols; j--; ) { |
| 517 |
|
|
const COLORV *cv = cm_lval(cm,i,j); |
| 518 |
|
|
rmx_lval(dnew,i,j,0) = cv[0]; |
| 519 |
|
|
rmx_lval(dnew,i,j,1) = cv[1]; |
| 520 |
|
|
rmx_lval(dnew,i,j,2) = cv[2]; |
| 521 |
|
|
} |
| 522 |
|
|
return(dnew); |
| 523 |
|
|
} |
| 524 |
|
|
|
| 525 |
|
|
/* Convert general matrix to newly allocated CMATRIX buffer */ |
| 526 |
|
|
CMATRIX * |
| 527 |
|
|
cm_from_rmatrix(const RMATRIX *rm) |
| 528 |
|
|
{ |
| 529 |
|
|
int i, j; |
| 530 |
|
|
CMATRIX *cnew; |
| 531 |
|
|
|
| 532 |
|
|
if (rm == NULL || rm->ncomp != 3) |
| 533 |
|
|
return(NULL); |
| 534 |
|
|
cnew = cm_alloc(rm->nrows, rm->ncols); |
| 535 |
|
|
if (cnew == NULL) |
| 536 |
|
|
return(NULL); |
| 537 |
|
|
for (i = cnew->nrows; i--; ) |
| 538 |
|
|
for (j = cnew->ncols; j--; ) { |
| 539 |
|
|
COLORV *cv = cm_lval(cnew,i,j); |
| 540 |
|
|
cv[0] = (COLORV)rmx_lval(rm,i,j,0); |
| 541 |
|
|
cv[1] = (COLORV)rmx_lval(rm,i,j,1); |
| 542 |
|
|
cv[2] = (COLORV)rmx_lval(rm,i,j,2); |
| 543 |
|
|
} |
| 544 |
|
|
return(cnew); |
| 545 |
|
|
} |
