src/util/rmatrix.c

#ifndef lint
static const char RCSid[] = "$Id: rmatrix.c,v 2.13 2015/05/04 20:53:21 greg Exp $";
#endif
/*
 * General matrix operations.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "resolu.h"
#include "rmatrix.h"

static char     rmx_mismatch_warn[] = "WARNING: data type mismatch\n";

/* Allocate a nr x nc matrix with n components */
RMATRIX *
rmx_alloc(int nr, int nc, int n)
{
        RMATRIX *dnew;

        if ((nr <= 0) | (nc <= 0) | (n <= 0))
                return(NULL);
        dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) +
                                        sizeof(dnew->mtx[0])*(n*nr*nc));
        if (dnew == NULL)
                return(NULL);
        dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
        dnew->dtype = DTdouble;
        dnew->info = NULL;
        return(dnew);
}

/* Free a RMATRIX array */
void
rmx_free(RMATRIX *rm)
{
        if (!rm) return;
        if (rm->info)
                free(rm->info);
        free(rm);
}

/* Resolve data type based on two input types (returns 0 for mismatch) */
int
rmx_newtype(int dtyp1, int dtyp2)
{
        if ((dtyp1==DTxyze) | (dtyp1==DTrgbe) |
                        (dtyp2==DTxyze) | (dtyp2==DTrgbe)
                        && dtyp1 != dtyp2)
                return(0);
        if (dtyp1 < dtyp2)
                return(dtyp1);
        return(dtyp2);
}

/* Append header information associated with matrix data */
int
rmx_addinfo(RMATRIX *rm, const char *info)
{
        if (!info || !*info)
                return(0);
        if (!rm->info) {
                rm->info = (char *)malloc(strlen(info)+1);
                if (rm->info) rm->info[0] = '\0';
        } else
                rm->info = (char *)realloc(rm->info,
                                strlen(rm->info)+strlen(info)+1);
        if (!rm->info)
                return(0);
        strcat(rm->info, info);
        return(1);
}

static int
get_dminfo(char *s, void *p)
{
        RMATRIX *ip = (RMATRIX *)p;
        char    fmt[64];
        int     i;

        if (headidval(fmt, s))
                return(0);
        if (!strncmp(s, "NCOMP=", 6)) {
                ip->ncomp = atoi(s+6);
                return(0);
        }
        if (!strncmp(s, "NROWS=", 6)) {
                ip->nrows = atoi(s+6);
                return(0);
        }
        if (!strncmp(s, "NCOLS=", 6)) {
                ip->ncols = atoi(s+6);
                return(0);
        }
        if (!formatval(fmt, s)) {
                rmx_addinfo(ip, s);
                return(0);
        }
        for (i = 1; i < DTend; i++)
                if (!strcmp(fmt, cm_fmt_id[i])) {
                        ip->dtype = i;
                        return(0);
                }
        return(-1);
}

static int
rmx_load_ascii(RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
#ifdef _WIN32
        _setmode(fileno(fp), _O_TEXT);
#endif
        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++)
                for (k = 0; k < rm->ncomp; k++)
                    if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1)
                        return(0);
        return(1);
}

static int
rmx_load_float(RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
        float   val[100];

        if (rm->ncomp > 100) {
                fputs("Unsupported # components in rmx_load_float()\n", stderr);
                exit(1);
        }
        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++) {
                if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
                    return(0);
                for (k = rm->ncomp; k--; )
                     rmx_lval(rm,i,j,k) = val[k];
            }
        return(1);
}

static int
rmx_load_double(RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
        double  val[100];

        if (rm->ncomp > 100) {
                fputs("Unsupported # components in rmx_load_double()\n", stderr);
                exit(1);
        }
        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++) {
                if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
                    return(0);
                for (k = rm->ncomp; k--; )
                     rmx_lval(rm,i,j,k) = val[k];
            }
        return(1);
}

static int
rmx_load_rgbe(RMATRIX *rm, FILE *fp)
{
        COLOR   *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols);
        int     i, j;

        if (scan == NULL)
                return(0);
        for (i = 0; i < rm->nrows; i++) {
            if (freadscan(scan, rm->ncols, fp) < 0) {
                free(scan);
                return(0);
            }
            for (j = rm->ncols; j--; ) {
                rmx_lval(rm,i,j,0) = colval(scan[j],RED);
                rmx_lval(rm,i,j,1) = colval(scan[j],GRN);
                rmx_lval(rm,i,j,2) = colval(scan[j],BLU);
            }
        }
        free(scan);
        return(1);
}

/* Load matrix from supported file type */
RMATRIX *
rmx_load(const char *inspec)
{
        FILE            *fp = stdin;
        RMATRIX         dinfo;
        RMATRIX         *dnew;

        if (inspec == NULL) {                   /* reading from stdin? */
                inspec = "<stdin>";
#ifdef _WIN32
                _setmode(fileno(stdin), _O_BINARY);
#endif
        } else if (inspec[0] == '!') {
                if ((fp = popen(inspec+1, "r")) == NULL)
                        return(NULL);
#ifdef _WIN32
                _setmode(fileno(fp), _O_BINARY);
#endif
        } else {
                const char      *sp = inspec;   /* check suffix */
                while (*sp)
                        ++sp;
                while (sp > inspec && sp[-1] != '.')
                        --sp;
                if (!strcasecmp(sp, "XML")) {   /* assume it's a BSDF */
                        CMATRIX *cm = cm_loadBTDF((char *)inspec);
                        if (cm == NULL)
                                return(NULL);
                        dnew = rmx_from_cmatrix(cm);
                        cm_free(cm);
                        return(dnew);
                }
                                                /* else open it ourselves */
                if ((fp = fopen(inspec, "rb")) == NULL)
                        return(NULL);
        }
#ifdef getc_unlocked
        flockfile(fp);
#endif
        dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
        dinfo.dtype = DTascii;                  /* assumed w/o FORMAT */
        dinfo.info = NULL;
        if (getheader(fp, get_dminfo, &dinfo) < 0) {
                fclose(fp);
                return(NULL);
        }
        if ((dinfo.nrows <= 0) | (dinfo.ncols <= 0)) {
                if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
                        fclose(fp);
                        return(NULL);
                }
                if (dinfo.ncomp <= 0)
                        dinfo.ncomp = 3;
                else if ((dinfo.dtype == DTrgbe) | (dinfo.dtype == DTxyze) &&
                                dinfo.ncomp != 3) {
                        fclose(fp);
                        return(NULL);
                }
        }
        dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
        if (dnew == NULL) {
                fclose(fp);
                return(NULL);
        }
        dnew->info = dinfo.info;
        switch (dinfo.dtype) {
        case DTascii:
                if (!rmx_load_ascii(dnew, fp))
                        goto loaderr;
                dnew->dtype = DTascii;          /* should leave double? */
                break;
        case DTfloat:
                if (!rmx_load_float(dnew, fp))
                        goto loaderr;
                dnew->dtype = DTfloat;
                break;
        case DTdouble:
                if (!rmx_load_double(dnew, fp))
                        goto loaderr;
                dnew->dtype = DTdouble;
                break;
        case DTrgbe:
        case DTxyze:
                if (!rmx_load_rgbe(dnew, fp))
                        goto loaderr;
                dnew->dtype = dinfo.dtype;
                break;
        default:
                goto loaderr;
        }
        if (fp != stdin) {
                if (inspec[0] == '!')
                        pclose(fp);
                else
                        fclose(fp);
        }
#ifdef getc_unlocked
        else
                funlockfile(fp);
#endif
        return(dnew);
loaderr:                                        /* should report error? */
        if (inspec[0] == '!')
                pclose(fp);
        else
                fclose(fp);
        rmx_free(dnew);
        return(NULL);
}

static int
rmx_write_ascii(const RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
#ifdef _WIN32
        _setmode(fileno(fp), _O_TEXT);
#endif
        for (i = 0; i < rm->nrows; i++) {
            for (j = 0; j < rm->ncols; j++) {
                for (k = 0; k < rm->ncomp; k++)
                    fprintf(fp, " %.15e", rmx_lval(rm,i,j,k));
                fputc('\t', fp);
            }
            fputc('\n', fp);
        }
        return(1);
}

static int
rmx_write_float(const RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
        float   val[100];

        if (rm->ncomp > 100) {
                fputs("Unsupported # components in rmx_write_float()\n", stderr);
                exit(1);
        }
        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++) {
                for (k = rm->ncomp; k--; )
                    val[k] = (float)rmx_lval(rm,i,j,k);
                if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
                        return(0);
            }
        return(1);
}

static int
rmx_write_double(const RMATRIX *rm, FILE *fp)
{
        int     i, j, k;
        double  val[100];

        if (rm->ncomp > 100) {
                fputs("Unsupported # components in rmx_write_double()\n", stderr);
                exit(1);
        }
        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++) {
                for (k = rm->ncomp; k--; )
                    val[k] = rmx_lval(rm,i,j,k);
                if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
                        return(0);
            }
        return(1);
}

static int
rmx_write_rgbe(const RMATRIX *rm, FILE *fp)
{
        COLOR   *scan = (COLOR *)malloc(sizeof(COLOR)*rm->ncols);
        int     i, j;

        if (scan == NULL)
                return(0);
        for (i = 0; i < rm->nrows; i++) {
            for (j = rm->ncols; j--; )
                setcolor(scan[j],       rmx_lval(rm,i,j,0),
                                        rmx_lval(rm,i,j,1),
                                        rmx_lval(rm,i,j,2)      );
            if (fwritescan(scan, rm->ncols, fp) < 0) {
                free(scan);
                return(0);
            }
        }
        free(scan);
        return(1);
}

/* Write matrix to file type indicated by dtype */
int
rmx_write(const RMATRIX *rm, int dtype, FILE *fp)
{
        RMATRIX *mydm = NULL;
        int     ok = 1;

        if ((rm == NULL) | (fp == NULL))
                return(0);
                                                /* complete header */
        if (rm->info)
                fputs(rm->info, fp);
        if (dtype == DTfromHeader)
                dtype = rm->dtype;
        else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
                dtype = DTxyze;
        else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
                dtype = DTrgbe;
        if ((dtype != DTrgbe) & (dtype != DTxyze)) {
                fprintf(fp, "NROWS=%d\n", rm->nrows);
                fprintf(fp, "NCOLS=%d\n", rm->ncols);
                fprintf(fp, "NCOMP=%d\n", rm->ncomp);
        } else if (rm->ncomp != 3) {            /* wrong # components? */
                double  cmtx[3];
                if (rm->ncomp != 1)             /* only convert grayscale */
                        return(0);
                cmtx[0] = cmtx[1] = cmtx[2] = 1;
                mydm = rmx_transform(rm, 3, cmtx);
                if (mydm == NULL)
                        return(0);
                rm = mydm;
        }
        fputformat((char *)cm_fmt_id[dtype], fp);
        fputc('\n', fp);
        switch (dtype) {                        /* write data */
        case DTascii:
                ok = rmx_write_ascii(rm, fp);
                break;
        case DTfloat:
                ok = rmx_write_float(rm, fp);
                break;
        case DTdouble:
                ok = rmx_write_double(rm, fp);
                break;
        case DTrgbe:
        case DTxyze:
                fprtresolu(rm->ncols, rm->nrows, fp);
                ok = rmx_write_rgbe(rm, fp);
                break;
        default:
                return(0);
        }
        ok &= (fflush(fp) == 0);
        rmx_free(mydm);
        return(ok);
}

/* Allocate and assign square identity matrix with n components */
RMATRIX *
rmx_identity(const int dim, const int n)
{
        RMATRIX *rid = rmx_alloc(dim, dim, n);
        int     i, k;

        if (rid == NULL)
                return(NULL);
        memset(rid->mtx, 0, sizeof(rid->mtx[0])*n*dim*dim);
        for (i = dim; i--; )
            for (k = n; k--; )
                rmx_lval(rid,i,i,k) = 1;
        return(rid);
}

/* Duplicate the given matrix */
RMATRIX *
rmx_copy(const RMATRIX *rm)
{
        RMATRIX *dnew;

        if (rm == NULL)
                return(NULL);
        dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
        if (dnew == NULL)
                return(NULL);
        rmx_addinfo(dnew, rm->info);
        dnew->dtype = rm->dtype;
        memcpy(dnew->mtx, rm->mtx,
                sizeof(rm->mtx[0])*rm->ncomp*rm->nrows*rm->ncols);
        return(dnew);
}

/* Allocate and assign transposed matrix */
RMATRIX *
rmx_transpose(const RMATRIX *rm)
{
        RMATRIX *dnew;
        int     i, j, k;

        if (rm == NULL)
                return(0);
        dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
        if (dnew == NULL)
                return(NULL);
        if (rm->info) {
                rmx_addinfo(dnew, rm->info);
                rmx_addinfo(dnew, "Transposed rows and columns\n");
        }
        dnew->dtype = rm->dtype;
        for (i = dnew->nrows; i--; )
            for (j = dnew->ncols; j--; )
                for (k = dnew->ncomp; k--; )
                        rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
        return(dnew);
}

/* Multiply (concatenate) two matrices and allocate the result */
RMATRIX *
rmx_multiply(const RMATRIX *m1, const RMATRIX *m2)
{
        RMATRIX *mres;
        int     i, j, k, h;

        if ((m1 == NULL) | (m2 == NULL) ||
                        (m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows))
                return(NULL);
        mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
        if (mres == NULL)
                return(NULL);
        i = rmx_newtype(m1->dtype, m2->dtype);
        if (i)
                mres->dtype = i;
        else
                rmx_addinfo(mres, rmx_mismatch_warn);
        for (i = mres->nrows; i--; )
            for (j = mres->ncols; j--; )
                for (k = mres->ncomp; k--; ) {
                    long double d = 0;
                    for (h = m1->ncols; h--; )
                        d += (long double)rmx_lval(m1,i,h,k) *
                                (long double)rmx_lval(m2,h,j,k);
                    rmx_lval(mres,i,j,k) = (double)d;
                }
        return(mres);
}

/* Sum second matrix into first, applying scale factor beforehand */
int
rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[])
{
        double  *mysf = NULL;
        int     i, j, k;

        if ((msum == NULL) | (madd == NULL) ||
                        (msum->nrows != madd->nrows) |
                        (msum->ncols != madd->ncols) |
                        (msum->ncomp != madd->ncomp))
                return(0);
        if (sf == NULL) {
                mysf = (double *)malloc(sizeof(double)*msum->ncomp);
                if (mysf == NULL)
                        return(0);
                for (k = msum->ncomp; k--; )
                        mysf[k] = 1;
                sf = mysf;
        }
        i = rmx_newtype(msum->dtype, madd->dtype);
        if (i)
                msum->dtype = i;
        else
                rmx_addinfo(msum, rmx_mismatch_warn);
        for (i = msum->nrows; i--; )
            for (j = msum->ncols; j--; )
                for (k = msum->ncomp; k--; )
                     rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);

        free(mysf);
        return(1);
}

/* Scale the given matrix by the indicated scalar component vector */
int
rmx_scale(RMATRIX *rm, const double sf[])
{
        int     i, j, k;

        if ((rm == NULL) | (sf == NULL))
                return(0);
        for (i = rm->nrows; i--; )
            for (j = rm->ncols; j--; )
                for (k = rm->ncomp; k--; )
                    rmx_lval(rm,i,j,k) *= sf[k];

        return(1);
}

/* Allocate new matrix and apply component transformation */
RMATRIX *
rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
{
        int     i, j, ks, kd;
        RMATRIX *dnew;

        if ((msrc == NULL) | (n <= 0) | (cmat == NULL))
                return(NULL);
        dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
        if (dnew == NULL)
                return(NULL);
        dnew->dtype = msrc->dtype;
        for (i = dnew->nrows; i--; )
            for (j = dnew->ncols; j--; )
                for (kd = dnew->ncomp; kd--; ) {
                    double      d = 0;
                    for (ks = msrc->ncomp; ks--; )
                        d += cmat[kd*msrc->ncomp + ks] * rmx_lval(msrc,i,j,ks);
                    rmx_lval(dnew,i,j,kd) = d;
                }
        return(dnew);
}

/* Convert a color matrix to newly allocated RMATRIX buffer */
RMATRIX *
rmx_from_cmatrix(const CMATRIX *cm)
{
        int     i, j;
        RMATRIX *dnew;

        if (cm == NULL)
                return(NULL);
        dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
        if (dnew == NULL)
                return(NULL);
        dnew->dtype = DTfloat;
        for (i = dnew->nrows; i--; )
            for (j = dnew->ncols; j--; ) {
                const COLORV    *cv = cm_lval(cm,i,j);
                rmx_lval(dnew,i,j,0) = cv[0];
                rmx_lval(dnew,i,j,1) = cv[1];
                rmx_lval(dnew,i,j,2) = cv[2];
            }
        return(dnew);
}

/* Convert general matrix to newly allocated CMATRIX buffer */
CMATRIX *
cm_from_rmatrix(const RMATRIX *rm)
{
        int     i, j;
        CMATRIX *cnew;

        if (rm == NULL || rm->ncomp != 3)
                return(NULL);
        cnew = cm_alloc(rm->nrows, rm->ncols);
        if (cnew == NULL)
                return(NULL);
        for (i = cnew->nrows; i--; )
            for (j = cnew->ncols; j--; ) {
                COLORV  *cv = cm_lval(cnew,i,j);
                cv[0] = (COLORV)rmx_lval(rm,i,j,0);
                cv[1] = (COLORV)rmx_lval(rm,i,j,1);
                cv[2] = (COLORV)rmx_lval(rm,i,j,2);
            }
        return(cnew);
}
Revision:	2.14
Committed:	Mon May 4 23:27:04 2015 UTC (8 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.13:	+4 -2 lines
Log Message:	Minor type-checking fix
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.14	static const char RCSid[] = "$Id: rmatrix.c,v 2.13 2015/05/04 20:53:21 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			#include "resolu.h"
13			#include "rmatrix.h"
14
15	greg	2.6	static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n";
16	greg	2.1
17			/* Allocate a nr x nc matrix with n components */
18			RMATRIX *
19			rmx_alloc(int nr, int nc, int n)
20			{
21			RMATRIX *dnew;
22
23			if ((nr <= 0) \| (nc <= 0) \| (n <= 0))
24			return(NULL);
25			dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) +
26			sizeof(dnew->mtx[0])(nnr*nc));
27			if (dnew == NULL)
28			return(NULL);
29			dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
30	greg	2.6	dnew->dtype = DTdouble;
31	greg	2.5	dnew->info = NULL;
32	greg	2.1	return(dnew);
33			}
34
35	greg	2.6	/* Free a RMATRIX array */
36			void
37			rmx_free(RMATRIX *rm)
38			{
39			if (!rm) return;
40			if (rm->info)
41			free(rm->info);
42			free(rm);
43			}
44
45			/* Resolve data type based on two input types (returns 0 for mismatch) */
46			int
47			rmx_newtype(int dtyp1, int dtyp2)
48			{
49	greg	2.14	if ((dtyp1==DTxyze) \| (dtyp1==DTrgbe) \|
50			(dtyp2==DTxyze) \| (dtyp2==DTrgbe)
51			&& dtyp1 != dtyp2)
52	greg	2.6	return(0);
53			if (dtyp1 < dtyp2)
54			return(dtyp1);
55			return(dtyp2);
56			}
57
58	greg	2.5	/* Append header information associated with matrix data */
59			int
60			rmx_addinfo(RMATRIX rm, const char info)
61			{
62			if (!info \|\| !*info)
63			return(0);
64	greg	2.8	if (!rm->info) {
65	greg	2.5	rm->info = (char *)malloc(strlen(info)+1);
66	greg	2.8	if (rm->info) rm->info[0] = '\0';
67			} else
68	greg	2.5	rm->info = (char *)realloc(rm->info,
69			strlen(rm->info)+strlen(info)+1);
70			if (!rm->info)
71			return(0);
72			strcat(rm->info, info);
73			return(1);
74			}
75
76	greg	2.1	static int
77			get_dminfo(char s, void p)
78			{
79	greg	2.6	RMATRIX ip = (RMATRIX )p;
80	greg	2.5	char fmt[64];
81	greg	2.1	int i;
82
83	greg	2.6	if (headidval(fmt, s))
84			return(0);
85	greg	2.1	if (!strncmp(s, "NCOMP=", 6)) {
86			ip->ncomp = atoi(s+6);
87			return(0);
88			}
89			if (!strncmp(s, "NROWS=", 6)) {
90			ip->nrows = atoi(s+6);
91			return(0);
92			}
93			if (!strncmp(s, "NCOLS=", 6)) {
94			ip->ncols = atoi(s+6);
95			return(0);
96			}
97	greg	2.5	if (!formatval(fmt, s)) {
98	greg	2.6	rmx_addinfo(ip, s);
99	greg	2.1	return(0);
100	greg	2.5	}
101	greg	2.1	for (i = 1; i < DTend; i++)
102			if (!strcmp(fmt, cm_fmt_id[i])) {
103			ip->dtype = i;
104			return(0);
105			}
106			return(-1);
107			}
108
109			static int
110			rmx_load_ascii(RMATRIX rm, FILE fp)
111			{
112			int i, j, k;
113			#ifdef _WIN32
114			_setmode(fileno(fp), _O_TEXT);
115			#endif
116			for (i = 0; i < rm->nrows; i++)
117			for (j = 0; j < rm->ncols; j++)
118			for (k = 0; k < rm->ncomp; k++)
119			if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1)
120			return(0);
121			return(1);
122			}
123
124			static int
125			rmx_load_float(RMATRIX rm, FILE fp)
126			{
127			int i, j, k;
128			float val[100];
129
130			if (rm->ncomp > 100) {
131			fputs("Unsupported # components in rmx_load_float()\n", stderr);
132			exit(1);
133			}
134			for (i = 0; i < rm->nrows; i++)
135			for (j = 0; j < rm->ncols; j++) {
136			if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
137			return(0);
138			for (k = rm->ncomp; k--; )
139			rmx_lval(rm,i,j,k) = val[k];
140			}
141			return(1);
142			}
143
144			static int
145			rmx_load_double(RMATRIX rm, FILE fp)
146			{
147			int i, j, k;
148			double val[100];
149
150			if (rm->ncomp > 100) {
151			fputs("Unsupported # components in rmx_load_double()\n", stderr);
152			exit(1);
153			}
154			for (i = 0; i < rm->nrows; i++)
155			for (j = 0; j < rm->ncols; j++) {
156			if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
157			return(0);
158			for (k = rm->ncomp; k--; )
159			rmx_lval(rm,i,j,k) = val[k];
160			}
161			return(1);
162			}
163
164			static int
165			rmx_load_rgbe(RMATRIX rm, FILE fp)
166			{
167			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
168			int i, j;
169
170			if (scan == NULL)
171			return(0);
172			for (i = 0; i < rm->nrows; i++) {
173			if (freadscan(scan, rm->ncols, fp) < 0) {
174			free(scan);
175			return(0);
176			}
177			for (j = rm->ncols; j--; ) {
178			rmx_lval(rm,i,j,0) = colval(scan[j],RED);
179			rmx_lval(rm,i,j,1) = colval(scan[j],GRN);
180			rmx_lval(rm,i,j,2) = colval(scan[j],BLU);
181			}
182			}
183			free(scan);
184			return(1);
185			}
186
187			/* Load matrix from supported file type */
188			RMATRIX *
189	greg	2.13	rmx_load(const char *inspec)
190	greg	2.1	{
191			FILE *fp = stdin;
192	greg	2.6	RMATRIX dinfo;
193	greg	2.1	RMATRIX *dnew;
194
195	greg	2.13	if (inspec == NULL) { /* reading from stdin? */
196			inspec = "<stdin>";
197	greg	2.7	#ifdef _WIN32
198			_setmode(fileno(stdin), _O_BINARY);
199			#endif
200	greg	2.13	} else if (inspec[0] == '!') {
201			if ((fp = popen(inspec+1, "r")) == NULL)
202			return(NULL);
203			#ifdef _WIN32
204			_setmode(fileno(fp), _O_BINARY);
205			#endif
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	2.1	if (cm == NULL)
215			return(NULL);
216			dnew = rmx_from_cmatrix(cm);
217			cm_free(cm);
218			return(dnew);
219			}
220			/* else open it ourselves */
221	greg	2.13	if ((fp = fopen(inspec, "rb")) == NULL)
222	greg	2.1	return(NULL);
223			}
224			#ifdef getc_unlocked
225			flockfile(fp);
226			#endif
227			dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
228	greg	2.6	dinfo.dtype = DTascii; /* assumed w/o FORMAT */
229			dinfo.info = NULL;
230	greg	2.3	if (getheader(fp, get_dminfo, &dinfo) < 0) {
231	greg	2.1	fclose(fp);
232			return(NULL);
233			}
234	greg	2.4	if ((dinfo.nrows <= 0) \| (dinfo.ncols <= 0)) {
235	greg	2.1	if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
236			fclose(fp);
237			return(NULL);
238			}
239	greg	2.4	if (dinfo.ncomp <= 0)
240			dinfo.ncomp = 3;
241			else if ((dinfo.dtype == DTrgbe) \| (dinfo.dtype == DTxyze) &&
242			dinfo.ncomp != 3) {
243			fclose(fp);
244			return(NULL);
245			}
246	greg	2.1	}
247			dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
248			if (dnew == NULL) {
249			fclose(fp);
250			return(NULL);
251			}
252	greg	2.6	dnew->info = dinfo.info;
253	greg	2.1	switch (dinfo.dtype) {
254			case DTascii:
255			if (!rmx_load_ascii(dnew, fp))
256			goto loaderr;
257	greg	2.11	dnew->dtype = DTascii; /* should leave double? */
258	greg	2.1	break;
259			case DTfloat:
260			if (!rmx_load_float(dnew, fp))
261			goto loaderr;
262	greg	2.6	dnew->dtype = DTfloat;
263	greg	2.1	break;
264			case DTdouble:
265			if (!rmx_load_double(dnew, fp))
266			goto loaderr;
267	greg	2.6	dnew->dtype = DTdouble;
268	greg	2.1	break;
269			case DTrgbe:
270			case DTxyze:
271			if (!rmx_load_rgbe(dnew, fp))
272			goto loaderr;
273	greg	2.6	dnew->dtype = dinfo.dtype;
274	greg	2.1	break;
275			default:
276			goto loaderr;
277			}
278	greg	2.13	if (fp != stdin) {
279			if (inspec[0] == '!')
280			pclose(fp);
281			else
282			fclose(fp);
283			}
284			#ifdef getc_unlocked
285			else
286			funlockfile(fp);
287			#endif
288	greg	2.1	return(dnew);
289			loaderr: /* should report error? */
290	greg	2.13	if (inspec[0] == '!')
291			pclose(fp);
292			else
293			fclose(fp);
294	greg	2.1	rmx_free(dnew);
295			return(NULL);
296			}
297
298			static int
299			rmx_write_ascii(const RMATRIX rm, FILE fp)
300			{
301			int i, j, k;
302			#ifdef _WIN32
303			_setmode(fileno(fp), _O_TEXT);
304			#endif
305			for (i = 0; i < rm->nrows; i++) {
306			for (j = 0; j < rm->ncols; j++) {
307			for (k = 0; k < rm->ncomp; k++)
308			fprintf(fp, " %.15e", rmx_lval(rm,i,j,k));
309			fputc('\t', fp);
310			}
311			fputc('\n', fp);
312			}
313			return(1);
314			}
315
316			static int
317			rmx_write_float(const RMATRIX rm, FILE fp)
318			{
319			int i, j, k;
320			float val[100];
321
322			if (rm->ncomp > 100) {
323			fputs("Unsupported # components in rmx_write_float()\n", stderr);
324			exit(1);
325			}
326			for (i = 0; i < rm->nrows; i++)
327			for (j = 0; j < rm->ncols; j++) {
328			for (k = rm->ncomp; k--; )
329			val[k] = (float)rmx_lval(rm,i,j,k);
330			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
331			return(0);
332			}
333			return(1);
334			}
335
336			static int
337			rmx_write_double(const RMATRIX rm, FILE fp)
338			{
339			int i, j, k;
340			double val[100];
341
342			if (rm->ncomp > 100) {
343			fputs("Unsupported # components in rmx_write_double()\n", stderr);
344			exit(1);
345			}
346			for (i = 0; i < rm->nrows; i++)
347			for (j = 0; j < rm->ncols; j++) {
348			for (k = rm->ncomp; k--; )
349			val[k] = rmx_lval(rm,i,j,k);
350			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
351			return(0);
352			}
353			return(1);
354			}
355
356			static int
357			rmx_write_rgbe(const RMATRIX rm, FILE fp)
358			{
359			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
360			int i, j;
361
362			if (scan == NULL)
363			return(0);
364			for (i = 0; i < rm->nrows; i++) {
365			for (j = rm->ncols; j--; )
366			setcolor(scan[j], rmx_lval(rm,i,j,0),
367			rmx_lval(rm,i,j,1),
368			rmx_lval(rm,i,j,2) );
369			if (fwritescan(scan, rm->ncols, fp) < 0) {
370			free(scan);
371			return(0);
372			}
373			}
374			free(scan);
375			return(1);
376			}
377
378	greg	2.6	/* Write matrix to file type indicated by dtype */
379	greg	2.10	int
380	greg	2.1	rmx_write(const RMATRIX rm, int dtype, FILE fp)
381			{
382			RMATRIX *mydm = NULL;
383			int ok = 1;
384
385			if ((rm == NULL) \| (fp == NULL))
386			return(0);
387			/* complete header */
388	greg	2.5	if (rm->info)
389			fputs(rm->info, fp);
390	greg	2.6	if (dtype == DTfromHeader)
391			dtype = rm->dtype;
392			else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
393			dtype = DTxyze;
394	greg	2.9	else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
395	greg	2.6	dtype = DTrgbe;
396	greg	2.1	if ((dtype != DTrgbe) & (dtype != DTxyze)) {
397			fprintf(fp, "NROWS=%d\n", rm->nrows);
398			fprintf(fp, "NCOLS=%d\n", rm->ncols);
399			fprintf(fp, "NCOMP=%d\n", rm->ncomp);
400			} else if (rm->ncomp != 3) { /* wrong # components? */
401			double cmtx[3];
402			if (rm->ncomp != 1) /* only convert grayscale */
403			return(0);
404			cmtx[0] = cmtx[1] = cmtx[2] = 1;
405			mydm = rmx_transform(rm, 3, cmtx);
406			if (mydm == NULL)
407			return(0);
408			rm = mydm;
409			}
410			fputformat((char *)cm_fmt_id[dtype], fp);
411			fputc('\n', fp);
412			switch (dtype) { /* write data */
413			case DTascii:
414			ok = rmx_write_ascii(rm, fp);
415			break;
416			case DTfloat:
417			ok = rmx_write_float(rm, fp);
418			break;
419			case DTdouble:
420			ok = rmx_write_double(rm, fp);
421			break;
422			case DTrgbe:
423			case DTxyze:
424			fprtresolu(rm->ncols, rm->nrows, fp);
425			ok = rmx_write_rgbe(rm, fp);
426			break;
427			default:
428			return(0);
429			}
430			ok &= (fflush(fp) == 0);
431			rmx_free(mydm);
432	greg	2.10	return(ok);
433	greg	2.1	}
434
435			/* Allocate and assign square identity matrix with n components */
436			RMATRIX *
437			rmx_identity(const int dim, const int n)
438			{
439			RMATRIX *rid = rmx_alloc(dim, dim, n);
440	greg	2.12	int i, k;
441	greg	2.1
442			if (rid == NULL)
443			return(NULL);
444	greg	2.12	memset(rid->mtx, 0, sizeof(rid->mtx[0])ndim*dim);
445	greg	2.1	for (i = dim; i--; )
446	greg	2.12	for (k = n; k--; )
447			rmx_lval(rid,i,i,k) = 1;
448	greg	2.1	return(rid);
449			}
450
451			/* Duplicate the given matrix */
452			RMATRIX *
453			rmx_copy(const RMATRIX *rm)
454			{
455			RMATRIX *dnew;
456
457			if (rm == NULL)
458			return(NULL);
459			dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
460			if (dnew == NULL)
461			return(NULL);
462	greg	2.5	rmx_addinfo(dnew, rm->info);
463	greg	2.6	dnew->dtype = rm->dtype;
464	greg	2.1	memcpy(dnew->mtx, rm->mtx,
465			sizeof(rm->mtx[0])rm->ncomprm->nrows*rm->ncols);
466			return(dnew);
467			}
468
469	greg	2.2	/* Allocate and assign transposed matrix */
470			RMATRIX *
471			rmx_transpose(const RMATRIX *rm)
472	greg	2.1	{
473	greg	2.2	RMATRIX *dnew;
474	greg	2.1	int i, j, k;
475
476			if (rm == NULL)
477			return(0);
478	greg	2.2	dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
479			if (dnew == NULL)
480			return(NULL);
481	greg	2.5	if (rm->info) {
482			rmx_addinfo(dnew, rm->info);
483			rmx_addinfo(dnew, "Transposed rows and columns\n");
484			}
485	greg	2.6	dnew->dtype = rm->dtype;
486	greg	2.2	for (i = dnew->nrows; i--; )
487			for (j = dnew->ncols; j--; )
488			for (k = dnew->ncomp; k--; )
489			rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
490			return(dnew);
491	greg	2.1	}
492
493			/* Multiply (concatenate) two matrices and allocate the result */
494			RMATRIX *
495			rmx_multiply(const RMATRIX m1, const RMATRIX m2)
496			{
497			RMATRIX *mres;
498			int i, j, k, h;
499
500			if ((m1 == NULL) \| (m2 == NULL) \|\|
501			(m1->ncomp != m2->ncomp) \| (m1->ncols != m2->nrows))
502			return(NULL);
503			mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
504			if (mres == NULL)
505			return(NULL);
506	greg	2.6	i = rmx_newtype(m1->dtype, m2->dtype);
507			if (i)
508			mres->dtype = i;
509			else
510			rmx_addinfo(mres, rmx_mismatch_warn);
511	greg	2.1	for (i = mres->nrows; i--; )
512			for (j = mres->ncols; j--; )
513	greg	2.8	for (k = mres->ncomp; k--; ) {
514	greg	2.1	long double d = 0;
515	greg	2.8	for (h = m1->ncols; h--; )
516	greg	2.1	d += (long double)rmx_lval(m1,i,h,k) *
517			(long double)rmx_lval(m2,h,j,k);
518			rmx_lval(mres,i,j,k) = (double)d;
519			}
520			return(mres);
521			}
522
523			/* Sum second matrix into first, applying scale factor beforehand */
524			int
525			rmx_sum(RMATRIX msum, const RMATRIX madd, const double sf[])
526			{
527			double *mysf = NULL;
528			int i, j, k;
529
530			if ((msum == NULL) \| (madd == NULL) \|\|
531			(msum->nrows != madd->nrows) \|
532			(msum->ncols != madd->ncols) \|
533			(msum->ncomp != madd->ncomp))
534			return(0);
535			if (sf == NULL) {
536			mysf = (double )malloc(sizeof(double)msum->ncomp);
537			if (mysf == NULL)
538			return(0);
539			for (k = msum->ncomp; k--; )
540			mysf[k] = 1;
541			sf = mysf;
542			}
543	greg	2.6	i = rmx_newtype(msum->dtype, madd->dtype);
544			if (i)
545			msum->dtype = i;
546			else
547			rmx_addinfo(msum, rmx_mismatch_warn);
548	greg	2.1	for (i = msum->nrows; i--; )
549			for (j = msum->ncols; j--; )
550			for (k = msum->ncomp; k--; )
551			rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);
552
553			free(mysf);
554			return(1);
555			}
556
557			/* Scale the given matrix by the indicated scalar component vector */
558			int
559			rmx_scale(RMATRIX *rm, const double sf[])
560			{
561			int i, j, k;
562
563			if ((rm == NULL) \| (sf == NULL))
564			return(0);
565			for (i = rm->nrows; i--; )
566			for (j = rm->ncols; j--; )
567			for (k = rm->ncomp; k--; )
568			rmx_lval(rm,i,j,k) *= sf[k];
569
570			return(1);
571			}
572
573			/* Allocate new matrix and apply component transformation */
574			RMATRIX *
575			rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
576			{
577			int i, j, ks, kd;
578			RMATRIX *dnew;
579
580			if ((msrc == NULL) \| (n <= 0) \| (cmat == NULL))
581			return(NULL);
582			dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
583			if (dnew == NULL)
584			return(NULL);
585	greg	2.6	dnew->dtype = msrc->dtype;
586	greg	2.1	for (i = dnew->nrows; i--; )
587			for (j = dnew->ncols; j--; )
588			for (kd = dnew->ncomp; kd--; ) {
589			double d = 0;
590			for (ks = msrc->ncomp; ks--; )
591			d += cmat[kdmsrc->ncomp + ks] rmx_lval(msrc,i,j,ks);
592			rmx_lval(dnew,i,j,kd) = d;
593			}
594			return(dnew);
595			}
596
597			/* Convert a color matrix to newly allocated RMATRIX buffer */
598			RMATRIX *
599			rmx_from_cmatrix(const CMATRIX *cm)
600			{
601			int i, j;
602			RMATRIX *dnew;
603
604			if (cm == NULL)
605			return(NULL);
606			dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
607			if (dnew == NULL)
608			return(NULL);
609	greg	2.6	dnew->dtype = DTfloat;
610	greg	2.1	for (i = dnew->nrows; i--; )
611			for (j = dnew->ncols; j--; ) {
612			const COLORV *cv = cm_lval(cm,i,j);
613			rmx_lval(dnew,i,j,0) = cv[0];
614			rmx_lval(dnew,i,j,1) = cv[1];
615			rmx_lval(dnew,i,j,2) = cv[2];
616			}
617			return(dnew);
618			}
619
620			/* Convert general matrix to newly allocated CMATRIX buffer */
621			CMATRIX *
622			cm_from_rmatrix(const RMATRIX *rm)
623			{
624			int i, j;
625			CMATRIX *cnew;
626
627			if (rm == NULL \|\| rm->ncomp != 3)
628			return(NULL);
629			cnew = cm_alloc(rm->nrows, rm->ncols);
630			if (cnew == NULL)
631			return(NULL);
632			for (i = cnew->nrows; i--; )
633			for (j = cnew->ncols; j--; ) {
634			COLORV *cv = cm_lval(cnew,i,j);
635			cv[0] = (COLORV)rmx_lval(rm,i,j,0);
636			cv[1] = (COLORV)rmx_lval(rm,i,j,1);
637			cv[2] = (COLORV)rmx_lval(rm,i,j,2);
638			}
639			return(cnew);
640			}