src/util/rmatrix.c

#ifndef lint
static const char RCSid[] = "$Id: rmatrix.c,v 2.17 2015/07/22 04:47:51 greg Exp $";
#endif
/*
 * General matrix operations.
 */

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

        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);
                        dnew->dtype = DTascii;
                        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:
#ifdef _WIN32
                _setmode(fileno(fp), _O_TEXT);
#endif
                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;

        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);
#ifdef getc_unlocked
        flockfile(fp);
#endif
                                                /* 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);
#ifdef getc_unlocked
        funlockfile(fp);
#endif
        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 += rmx_lval(m1,i,h,k) * 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:	2.18
Committed:	Thu Aug 27 04:07:05 2015 UTC (8 years, 7 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R0
Changes since 2.17:	+2 -1 lines
Log Message:	Make sure result from loading XML file is ASCII
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.18	static const char RCSid[] = "$Id: rmatrix.c,v 2.17 2015/07/22 04:47:51 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	greg	2.15	#include "rtprocess.h"
14	greg	2.1	#include "rmatrix.h"
15
16	greg	2.6	static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n";
17	greg	2.1
18			/* Allocate a nr x nc matrix with n components */
19			RMATRIX *
20			rmx_alloc(int nr, int nc, int n)
21			{
22			RMATRIX *dnew;
23
24			if ((nr <= 0) \| (nc <= 0) \| (n <= 0))
25			return(NULL);
26			dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) +
27			sizeof(dnew->mtx[0])(nnr*nc));
28			if (dnew == NULL)
29			return(NULL);
30			dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
31	greg	2.6	dnew->dtype = DTdouble;
32	greg	2.5	dnew->info = NULL;
33	greg	2.1	return(dnew);
34			}
35
36	greg	2.6	/* Free a RMATRIX array */
37			void
38			rmx_free(RMATRIX *rm)
39			{
40			if (!rm) return;
41			if (rm->info)
42			free(rm->info);
43			free(rm);
44			}
45
46			/* Resolve data type based on two input types (returns 0 for mismatch) */
47			int
48			rmx_newtype(int dtyp1, int dtyp2)
49			{
50	greg	2.14	if ((dtyp1==DTxyze) \| (dtyp1==DTrgbe) \|
51			(dtyp2==DTxyze) \| (dtyp2==DTrgbe)
52			&& dtyp1 != dtyp2)
53	greg	2.6	return(0);
54			if (dtyp1 < dtyp2)
55			return(dtyp1);
56			return(dtyp2);
57			}
58
59	greg	2.5	/* Append header information associated with matrix data */
60			int
61			rmx_addinfo(RMATRIX rm, const char info)
62			{
63			if (!info \|\| !*info)
64			return(0);
65	greg	2.8	if (!rm->info) {
66	greg	2.5	rm->info = (char *)malloc(strlen(info)+1);
67	greg	2.8	if (rm->info) rm->info[0] = '\0';
68			} else
69	greg	2.5	rm->info = (char *)realloc(rm->info,
70			strlen(rm->info)+strlen(info)+1);
71			if (!rm->info)
72			return(0);
73			strcat(rm->info, info);
74			return(1);
75			}
76
77	greg	2.1	static int
78			get_dminfo(char s, void p)
79			{
80	greg	2.6	RMATRIX ip = (RMATRIX )p;
81	greg	2.5	char fmt[64];
82	greg	2.1	int i;
83
84	greg	2.6	if (headidval(fmt, s))
85			return(0);
86	greg	2.1	if (!strncmp(s, "NCOMP=", 6)) {
87			ip->ncomp = atoi(s+6);
88			return(0);
89			}
90			if (!strncmp(s, "NROWS=", 6)) {
91			ip->nrows = atoi(s+6);
92			return(0);
93			}
94			if (!strncmp(s, "NCOLS=", 6)) {
95			ip->ncols = atoi(s+6);
96			return(0);
97			}
98	greg	2.5	if (!formatval(fmt, s)) {
99	greg	2.6	rmx_addinfo(ip, s);
100	greg	2.1	return(0);
101	greg	2.5	}
102	greg	2.1	for (i = 1; i < DTend; i++)
103			if (!strcmp(fmt, cm_fmt_id[i])) {
104			ip->dtype = i;
105			return(0);
106			}
107			return(-1);
108			}
109
110			static int
111			rmx_load_ascii(RMATRIX rm, FILE fp)
112			{
113			int i, j, k;
114	greg	2.17
115	greg	2.1	for (i = 0; i < rm->nrows; i++)
116			for (j = 0; j < rm->ncols; j++)
117			for (k = 0; k < rm->ncomp; k++)
118			if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1)
119			return(0);
120			return(1);
121			}
122
123			static int
124			rmx_load_float(RMATRIX rm, FILE fp)
125			{
126			int i, j, k;
127			float val[100];
128
129			if (rm->ncomp > 100) {
130			fputs("Unsupported # components in rmx_load_float()\n", stderr);
131			exit(1);
132			}
133			for (i = 0; i < rm->nrows; i++)
134			for (j = 0; j < rm->ncols; j++) {
135			if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
136			return(0);
137			for (k = rm->ncomp; k--; )
138			rmx_lval(rm,i,j,k) = val[k];
139			}
140			return(1);
141			}
142
143			static int
144			rmx_load_double(RMATRIX rm, FILE fp)
145			{
146			int i, j, k;
147			double val[100];
148
149			if (rm->ncomp > 100) {
150			fputs("Unsupported # components in rmx_load_double()\n", stderr);
151			exit(1);
152			}
153			for (i = 0; i < rm->nrows; i++)
154			for (j = 0; j < rm->ncols; j++) {
155			if (fread(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
156			return(0);
157			for (k = rm->ncomp; k--; )
158			rmx_lval(rm,i,j,k) = val[k];
159			}
160			return(1);
161			}
162
163			static int
164			rmx_load_rgbe(RMATRIX rm, FILE fp)
165			{
166			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
167			int i, j;
168
169			if (scan == NULL)
170			return(0);
171			for (i = 0; i < rm->nrows; i++) {
172			if (freadscan(scan, rm->ncols, fp) < 0) {
173			free(scan);
174			return(0);
175			}
176			for (j = rm->ncols; j--; ) {
177			rmx_lval(rm,i,j,0) = colval(scan[j],RED);
178			rmx_lval(rm,i,j,1) = colval(scan[j],GRN);
179			rmx_lval(rm,i,j,2) = colval(scan[j],BLU);
180			}
181			}
182			free(scan);
183			return(1);
184			}
185
186			/* Load matrix from supported file type */
187			RMATRIX *
188	greg	2.13	rmx_load(const char *inspec)
189	greg	2.1	{
190			FILE *fp = stdin;
191	greg	2.6	RMATRIX dinfo;
192	greg	2.1	RMATRIX *dnew;
193
194	greg	2.13	if (inspec == NULL) { /* reading from stdin? */
195			inspec = "<stdin>";
196	greg	2.7	#ifdef _WIN32
197			_setmode(fileno(stdin), _O_BINARY);
198			#endif
199	greg	2.13	} else if (inspec[0] == '!') {
200			if ((fp = popen(inspec+1, "r")) == NULL)
201			return(NULL);
202			#ifdef _WIN32
203			_setmode(fileno(fp), _O_BINARY);
204			#endif
205	greg	2.1	} else {
206	greg	2.13	const char sp = inspec; / check suffix */
207	greg	2.1	while (*sp)
208			++sp;
209	greg	2.13	while (sp > inspec && sp[-1] != '.')
210	greg	2.1	--sp;
211			if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */
212	greg	2.13	CMATRIX cm = cm_loadBTDF((char )inspec);
213	greg	2.1	if (cm == NULL)
214			return(NULL);
215			dnew = rmx_from_cmatrix(cm);
216			cm_free(cm);
217	greg	2.18	dnew->dtype = DTascii;
218	greg	2.1	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	greg	2.17	#ifdef _WIN32
256			_setmode(fileno(fp), _O_TEXT);
257			#endif
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			if (!rmx_load_float(dnew, fp))
264			goto loaderr;
265	greg	2.6	dnew->dtype = DTfloat;
266	greg	2.1	break;
267			case DTdouble:
268			if (!rmx_load_double(dnew, fp))
269			goto loaderr;
270	greg	2.6	dnew->dtype = DTdouble;
271	greg	2.1	break;
272			case DTrgbe:
273			case DTxyze:
274			if (!rmx_load_rgbe(dnew, fp))
275			goto loaderr;
276	greg	2.6	dnew->dtype = dinfo.dtype;
277	greg	2.1	break;
278			default:
279			goto loaderr;
280			}
281	greg	2.13	if (fp != stdin) {
282			if (inspec[0] == '!')
283			pclose(fp);
284			else
285			fclose(fp);
286			}
287			#ifdef getc_unlocked
288			else
289			funlockfile(fp);
290			#endif
291	greg	2.1	return(dnew);
292			loaderr: /* should report error? */
293	greg	2.13	if (inspec[0] == '!')
294			pclose(fp);
295			else
296			fclose(fp);
297	greg	2.1	rmx_free(dnew);
298			return(NULL);
299			}
300
301			static int
302			rmx_write_ascii(const RMATRIX rm, FILE fp)
303			{
304			int i, j, k;
305	greg	2.17
306	greg	2.1	for (i = 0; i < rm->nrows; i++) {
307			for (j = 0; j < rm->ncols; j++) {
308			for (k = 0; k < rm->ncomp; k++)
309			fprintf(fp, " %.15e", rmx_lval(rm,i,j,k));
310			fputc('\t', fp);
311			}
312			fputc('\n', fp);
313			}
314			return(1);
315			}
316
317			static int
318			rmx_write_float(const RMATRIX rm, FILE fp)
319			{
320			int i, j, k;
321			float val[100];
322
323			if (rm->ncomp > 100) {
324			fputs("Unsupported # components in rmx_write_float()\n", stderr);
325			exit(1);
326			}
327			for (i = 0; i < rm->nrows; i++)
328			for (j = 0; j < rm->ncols; j++) {
329			for (k = rm->ncomp; k--; )
330			val[k] = (float)rmx_lval(rm,i,j,k);
331			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
332			return(0);
333			}
334			return(1);
335			}
336
337			static int
338			rmx_write_double(const RMATRIX rm, FILE fp)
339			{
340			int i, j, k;
341			double val[100];
342
343			if (rm->ncomp > 100) {
344			fputs("Unsupported # components in rmx_write_double()\n", stderr);
345			exit(1);
346			}
347			for (i = 0; i < rm->nrows; i++)
348			for (j = 0; j < rm->ncols; j++) {
349			for (k = rm->ncomp; k--; )
350			val[k] = rmx_lval(rm,i,j,k);
351			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
352			return(0);
353			}
354			return(1);
355			}
356
357			static int
358			rmx_write_rgbe(const RMATRIX rm, FILE fp)
359			{
360			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
361			int i, j;
362
363			if (scan == NULL)
364			return(0);
365			for (i = 0; i < rm->nrows; i++) {
366			for (j = rm->ncols; j--; )
367			setcolor(scan[j], rmx_lval(rm,i,j,0),
368			rmx_lval(rm,i,j,1),
369			rmx_lval(rm,i,j,2) );
370			if (fwritescan(scan, rm->ncols, fp) < 0) {
371			free(scan);
372			return(0);
373			}
374			}
375			free(scan);
376			return(1);
377			}
378
379	greg	2.6	/* Write matrix to file type indicated by dtype */
380	greg	2.10	int
381	greg	2.1	rmx_write(const RMATRIX rm, int dtype, FILE fp)
382			{
383			RMATRIX *mydm = NULL;
384			int ok = 1;
385
386			if ((rm == NULL) \| (fp == NULL))
387			return(0);
388	greg	2.17	#ifdef getc_unlocked
389			flockfile(fp);
390			#endif
391	greg	2.1	/* complete header */
392	greg	2.5	if (rm->info)
393			fputs(rm->info, fp);
394	greg	2.6	if (dtype == DTfromHeader)
395			dtype = rm->dtype;
396			else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
397			dtype = DTxyze;
398	greg	2.9	else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
399	greg	2.6	dtype = DTrgbe;
400	greg	2.1	if ((dtype != DTrgbe) & (dtype != DTxyze)) {
401			fprintf(fp, "NROWS=%d\n", rm->nrows);
402			fprintf(fp, "NCOLS=%d\n", rm->ncols);
403			fprintf(fp, "NCOMP=%d\n", rm->ncomp);
404			} else if (rm->ncomp != 3) { /* wrong # components? */
405			double cmtx[3];
406			if (rm->ncomp != 1) /* only convert grayscale */
407			return(0);
408			cmtx[0] = cmtx[1] = cmtx[2] = 1;
409			mydm = rmx_transform(rm, 3, cmtx);
410			if (mydm == NULL)
411			return(0);
412			rm = mydm;
413			}
414			fputformat((char *)cm_fmt_id[dtype], fp);
415			fputc('\n', fp);
416			switch (dtype) { /* write data */
417			case DTascii:
418			ok = rmx_write_ascii(rm, fp);
419			break;
420			case DTfloat:
421			ok = rmx_write_float(rm, fp);
422			break;
423			case DTdouble:
424			ok = rmx_write_double(rm, fp);
425			break;
426			case DTrgbe:
427			case DTxyze:
428			fprtresolu(rm->ncols, rm->nrows, fp);
429			ok = rmx_write_rgbe(rm, fp);
430			break;
431			default:
432			return(0);
433			}
434			ok &= (fflush(fp) == 0);
435	greg	2.17	#ifdef getc_unlocked
436			funlockfile(fp);
437			#endif
438	greg	2.1	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			if (rid == NULL)
450			return(NULL);
451	greg	2.12	memset(rid->mtx, 0, sizeof(rid->mtx[0])ndim*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			if (rm == NULL)
465			return(NULL);
466			dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
467			if (dnew == NULL)
468			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->ncomprm->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			if (rm == NULL)
484			return(0);
485	greg	2.2	dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
486			if (dnew == NULL)
487			return(NULL);
488	greg	2.5	if (rm->info) {
489			rmx_addinfo(dnew, rm->info);
490			rmx_addinfo(dnew, "Transposed rows and columns\n");
491			}
492	greg	2.6	dnew->dtype = rm->dtype;
493	greg	2.2	for (i = dnew->nrows; i--; )
494			for (j = dnew->ncols; j--; )
495			for (k = dnew->ncomp; k--; )
496			rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
497			return(dnew);
498	greg	2.1	}
499
500			/* Multiply (concatenate) two matrices and allocate the result */
501			RMATRIX *
502			rmx_multiply(const RMATRIX m1, const RMATRIX m2)
503			{
504			RMATRIX *mres;
505			int i, j, k, h;
506
507			if ((m1 == NULL) \| (m2 == NULL) \|\|
508			(m1->ncomp != m2->ncomp) \| (m1->ncols != m2->nrows))
509			return(NULL);
510			mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
511			if (mres == NULL)
512			return(NULL);
513	greg	2.6	i = rmx_newtype(m1->dtype, m2->dtype);
514			if (i)
515			mres->dtype = i;
516			else
517			rmx_addinfo(mres, rmx_mismatch_warn);
518	greg	2.1	for (i = mres->nrows; i--; )
519			for (j = mres->ncols; j--; )
520	greg	2.8	for (k = mres->ncomp; k--; ) {
521	greg	2.1	long double d = 0;
522	greg	2.8	for (h = m1->ncols; h--; )
523	greg	2.16	d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k);
524	greg	2.1	rmx_lval(mres,i,j,k) = (double)d;
525			}
526			return(mres);
527			}
528
529			/* Sum second matrix into first, applying scale factor beforehand */
530			int
531			rmx_sum(RMATRIX msum, const RMATRIX madd, const double sf[])
532			{
533			double *mysf = NULL;
534			int i, j, k;
535
536			if ((msum == NULL) \| (madd == NULL) \|\|
537			(msum->nrows != madd->nrows) \|
538			(msum->ncols != madd->ncols) \|
539			(msum->ncomp != madd->ncomp))
540			return(0);
541			if (sf == NULL) {
542			mysf = (double )malloc(sizeof(double)msum->ncomp);
543			if (mysf == NULL)
544			return(0);
545			for (k = msum->ncomp; k--; )
546			mysf[k] = 1;
547			sf = mysf;
548			}
549	greg	2.6	i = rmx_newtype(msum->dtype, madd->dtype);
550			if (i)
551			msum->dtype = i;
552			else
553			rmx_addinfo(msum, rmx_mismatch_warn);
554	greg	2.1	for (i = msum->nrows; i--; )
555			for (j = msum->ncols; j--; )
556			for (k = msum->ncomp; k--; )
557			rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);
558
559			free(mysf);
560			return(1);
561			}
562
563			/* Scale the given matrix by the indicated scalar component vector */
564			int
565			rmx_scale(RMATRIX *rm, const double sf[])
566			{
567			int i, j, k;
568
569			if ((rm == NULL) \| (sf == NULL))
570			return(0);
571			for (i = rm->nrows; i--; )
572			for (j = rm->ncols; j--; )
573			for (k = rm->ncomp; k--; )
574			rmx_lval(rm,i,j,k) *= sf[k];
575
576			return(1);
577			}
578
579			/* Allocate new matrix and apply component transformation */
580			RMATRIX *
581			rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
582			{
583			int i, j, ks, kd;
584			RMATRIX *dnew;
585
586			if ((msrc == NULL) \| (n <= 0) \| (cmat == NULL))
587			return(NULL);
588			dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
589			if (dnew == NULL)
590			return(NULL);
591	greg	2.6	dnew->dtype = msrc->dtype;
592	greg	2.1	for (i = dnew->nrows; i--; )
593			for (j = dnew->ncols; j--; )
594			for (kd = dnew->ncomp; kd--; ) {
595			double d = 0;
596			for (ks = msrc->ncomp; ks--; )
597			d += cmat[kdmsrc->ncomp + ks] rmx_lval(msrc,i,j,ks);
598			rmx_lval(dnew,i,j,kd) = d;
599			}
600			return(dnew);
601			}
602
603			/* Convert a color matrix to newly allocated RMATRIX buffer */
604			RMATRIX *
605			rmx_from_cmatrix(const CMATRIX *cm)
606			{
607			int i, j;
608			RMATRIX *dnew;
609
610			if (cm == NULL)
611			return(NULL);
612			dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
613			if (dnew == NULL)
614			return(NULL);
615	greg	2.6	dnew->dtype = DTfloat;
616	greg	2.1	for (i = dnew->nrows; i--; )
617			for (j = dnew->ncols; j--; ) {
618			const COLORV *cv = cm_lval(cm,i,j);
619			rmx_lval(dnew,i,j,0) = cv[0];
620			rmx_lval(dnew,i,j,1) = cv[1];
621			rmx_lval(dnew,i,j,2) = cv[2];
622			}
623			return(dnew);
624			}
625
626			/* Convert general matrix to newly allocated CMATRIX buffer */
627			CMATRIX *
628			cm_from_rmatrix(const RMATRIX *rm)
629			{
630			int i, j;
631			CMATRIX *cnew;
632
633			if (rm == NULL \|\| rm->ncomp != 3)
634			return(NULL);
635			cnew = cm_alloc(rm->nrows, rm->ncols);
636			if (cnew == NULL)
637			return(NULL);
638			for (i = cnew->nrows; i--; )
639			for (j = cnew->ncols; j--; ) {
640			COLORV *cv = cm_lval(cnew,i,j);
641			cv[0] = (COLORV)rmx_lval(rm,i,j,0);
642			cv[1] = (COLORV)rmx_lval(rm,i,j,1);
643			cv[2] = (COLORV)rmx_lval(rm,i,j,2);
644			}
645			return(cnew);
646			}