src/util/rmatrix.c

#ifndef lint
static const char RCSid[] = "$Id: rmatrix.c,v 2.16 2015/07/22 04:29:56 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);
                        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:	2.17
Committed:	Wed Jul 22 04:47:51 2015 UTC (8 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.16:	+12 -7 lines
Log Message:	Moved some file settings around to improve logic
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.17	static const char RCSid[] = "$Id: rmatrix.c,v 2.16 2015/07/22 04:29:56 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			return(dnew);
218			}
219			/* else open it ourselves */
220	greg	2.13	if ((fp = fopen(inspec, "rb")) == NULL)
221	greg	2.1	return(NULL);
222			}
223			#ifdef getc_unlocked
224			flockfile(fp);
225			#endif
226			dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
227	greg	2.6	dinfo.dtype = DTascii; /* assumed w/o FORMAT */
228			dinfo.info = NULL;
229	greg	2.3	if (getheader(fp, get_dminfo, &dinfo) < 0) {
230	greg	2.1	fclose(fp);
231			return(NULL);
232			}
233	greg	2.4	if ((dinfo.nrows <= 0) \| (dinfo.ncols <= 0)) {
234	greg	2.1	if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
235			fclose(fp);
236			return(NULL);
237			}
238	greg	2.4	if (dinfo.ncomp <= 0)
239			dinfo.ncomp = 3;
240			else if ((dinfo.dtype == DTrgbe) \| (dinfo.dtype == DTxyze) &&
241			dinfo.ncomp != 3) {
242			fclose(fp);
243			return(NULL);
244			}
245	greg	2.1	}
246			dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
247			if (dnew == NULL) {
248			fclose(fp);
249			return(NULL);
250			}
251	greg	2.6	dnew->info = dinfo.info;
252	greg	2.1	switch (dinfo.dtype) {
253			case DTascii:
254	greg	2.17	#ifdef _WIN32
255			_setmode(fileno(fp), _O_TEXT);
256			#endif
257	greg	2.1	if (!rmx_load_ascii(dnew, fp))
258			goto loaderr;
259	greg	2.11	dnew->dtype = DTascii; /* should leave double? */
260	greg	2.1	break;
261			case DTfloat:
262			if (!rmx_load_float(dnew, fp))
263			goto loaderr;
264	greg	2.6	dnew->dtype = DTfloat;
265	greg	2.1	break;
266			case DTdouble:
267			if (!rmx_load_double(dnew, fp))
268			goto loaderr;
269	greg	2.6	dnew->dtype = DTdouble;
270	greg	2.1	break;
271			case DTrgbe:
272			case DTxyze:
273			if (!rmx_load_rgbe(dnew, fp))
274			goto loaderr;
275	greg	2.6	dnew->dtype = dinfo.dtype;
276	greg	2.1	break;
277			default:
278			goto loaderr;
279			}
280	greg	2.13	if (fp != stdin) {
281			if (inspec[0] == '!')
282			pclose(fp);
283			else
284			fclose(fp);
285			}
286			#ifdef getc_unlocked
287			else
288			funlockfile(fp);
289			#endif
290	greg	2.1	return(dnew);
291			loaderr: /* should report error? */
292	greg	2.13	if (inspec[0] == '!')
293			pclose(fp);
294			else
295			fclose(fp);
296	greg	2.1	rmx_free(dnew);
297			return(NULL);
298			}
299
300			static int
301			rmx_write_ascii(const RMATRIX rm, FILE fp)
302			{
303			int i, j, k;
304	greg	2.17
305	greg	2.1	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	greg	2.17	#ifdef getc_unlocked
388			flockfile(fp);
389			#endif
390	greg	2.1	/* complete header */
391	greg	2.5	if (rm->info)
392			fputs(rm->info, fp);
393	greg	2.6	if (dtype == DTfromHeader)
394			dtype = rm->dtype;
395			else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
396			dtype = DTxyze;
397	greg	2.9	else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
398	greg	2.6	dtype = DTrgbe;
399	greg	2.1	if ((dtype != DTrgbe) & (dtype != DTxyze)) {
400			fprintf(fp, "NROWS=%d\n", rm->nrows);
401			fprintf(fp, "NCOLS=%d\n", rm->ncols);
402			fprintf(fp, "NCOMP=%d\n", rm->ncomp);
403			} else if (rm->ncomp != 3) { /* wrong # components? */
404			double cmtx[3];
405			if (rm->ncomp != 1) /* only convert grayscale */
406			return(0);
407			cmtx[0] = cmtx[1] = cmtx[2] = 1;
408			mydm = rmx_transform(rm, 3, cmtx);
409			if (mydm == NULL)
410			return(0);
411			rm = mydm;
412			}
413			fputformat((char *)cm_fmt_id[dtype], fp);
414			fputc('\n', fp);
415			switch (dtype) { /* write data */
416			case DTascii:
417			ok = rmx_write_ascii(rm, fp);
418			break;
419			case DTfloat:
420			ok = rmx_write_float(rm, fp);
421			break;
422			case DTdouble:
423			ok = rmx_write_double(rm, fp);
424			break;
425			case DTrgbe:
426			case DTxyze:
427			fprtresolu(rm->ncols, rm->nrows, fp);
428			ok = rmx_write_rgbe(rm, fp);
429			break;
430			default:
431			return(0);
432			}
433			ok &= (fflush(fp) == 0);
434	greg	2.17	#ifdef getc_unlocked
435			funlockfile(fp);
436			#endif
437	greg	2.1	rmx_free(mydm);
438	greg	2.10	return(ok);
439	greg	2.1	}
440
441			/* Allocate and assign square identity matrix with n components */
442			RMATRIX *
443			rmx_identity(const int dim, const int n)
444			{
445			RMATRIX *rid = rmx_alloc(dim, dim, n);
446	greg	2.12	int i, k;
447	greg	2.1
448			if (rid == NULL)
449			return(NULL);
450	greg	2.12	memset(rid->mtx, 0, sizeof(rid->mtx[0])ndim*dim);
451	greg	2.1	for (i = dim; i--; )
452	greg	2.12	for (k = n; k--; )
453			rmx_lval(rid,i,i,k) = 1;
454	greg	2.1	return(rid);
455			}
456
457			/* Duplicate the given matrix */
458			RMATRIX *
459			rmx_copy(const RMATRIX *rm)
460			{
461			RMATRIX *dnew;
462
463			if (rm == NULL)
464			return(NULL);
465			dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
466			if (dnew == NULL)
467			return(NULL);
468	greg	2.5	rmx_addinfo(dnew, rm->info);
469	greg	2.6	dnew->dtype = rm->dtype;
470	greg	2.1	memcpy(dnew->mtx, rm->mtx,
471			sizeof(rm->mtx[0])rm->ncomprm->nrows*rm->ncols);
472			return(dnew);
473			}
474
475	greg	2.2	/* Allocate and assign transposed matrix */
476			RMATRIX *
477			rmx_transpose(const RMATRIX *rm)
478	greg	2.1	{
479	greg	2.2	RMATRIX *dnew;
480	greg	2.1	int i, j, k;
481
482			if (rm == NULL)
483			return(0);
484	greg	2.2	dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
485			if (dnew == NULL)
486			return(NULL);
487	greg	2.5	if (rm->info) {
488			rmx_addinfo(dnew, rm->info);
489			rmx_addinfo(dnew, "Transposed rows and columns\n");
490			}
491	greg	2.6	dnew->dtype = rm->dtype;
492	greg	2.2	for (i = dnew->nrows; i--; )
493			for (j = dnew->ncols; j--; )
494			for (k = dnew->ncomp; k--; )
495			rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
496			return(dnew);
497	greg	2.1	}
498
499			/* Multiply (concatenate) two matrices and allocate the result */
500			RMATRIX *
501			rmx_multiply(const RMATRIX m1, const RMATRIX m2)
502			{
503			RMATRIX *mres;
504			int i, j, k, h;
505
506			if ((m1 == NULL) \| (m2 == NULL) \|\|
507			(m1->ncomp != m2->ncomp) \| (m1->ncols != m2->nrows))
508			return(NULL);
509			mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
510			if (mres == NULL)
511			return(NULL);
512	greg	2.6	i = rmx_newtype(m1->dtype, m2->dtype);
513			if (i)
514			mres->dtype = i;
515			else
516			rmx_addinfo(mres, rmx_mismatch_warn);
517	greg	2.1	for (i = mres->nrows; i--; )
518			for (j = mres->ncols; j--; )
519	greg	2.8	for (k = mres->ncomp; k--; ) {
520	greg	2.1	long double d = 0;
521	greg	2.8	for (h = m1->ncols; h--; )
522	greg	2.16	d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k);
523	greg	2.1	rmx_lval(mres,i,j,k) = (double)d;
524			}
525			return(mres);
526			}
527
528			/* Sum second matrix into first, applying scale factor beforehand */
529			int
530			rmx_sum(RMATRIX msum, const RMATRIX madd, const double sf[])
531			{
532			double *mysf = NULL;
533			int i, j, k;
534
535			if ((msum == NULL) \| (madd == NULL) \|\|
536			(msum->nrows != madd->nrows) \|
537			(msum->ncols != madd->ncols) \|
538			(msum->ncomp != madd->ncomp))
539			return(0);
540			if (sf == NULL) {
541			mysf = (double )malloc(sizeof(double)msum->ncomp);
542			if (mysf == NULL)
543			return(0);
544			for (k = msum->ncomp; k--; )
545			mysf[k] = 1;
546			sf = mysf;
547			}
548	greg	2.6	i = rmx_newtype(msum->dtype, madd->dtype);
549			if (i)
550			msum->dtype = i;
551			else
552			rmx_addinfo(msum, rmx_mismatch_warn);
553	greg	2.1	for (i = msum->nrows; i--; )
554			for (j = msum->ncols; j--; )
555			for (k = msum->ncomp; k--; )
556			rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);
557
558			free(mysf);
559			return(1);
560			}
561
562			/* Scale the given matrix by the indicated scalar component vector */
563			int
564			rmx_scale(RMATRIX *rm, const double sf[])
565			{
566			int i, j, k;
567
568			if ((rm == NULL) \| (sf == NULL))
569			return(0);
570			for (i = rm->nrows; i--; )
571			for (j = rm->ncols; j--; )
572			for (k = rm->ncomp; k--; )
573			rmx_lval(rm,i,j,k) *= sf[k];
574
575			return(1);
576			}
577
578			/* Allocate new matrix and apply component transformation */
579			RMATRIX *
580			rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
581			{
582			int i, j, ks, kd;
583			RMATRIX *dnew;
584
585			if ((msrc == NULL) \| (n <= 0) \| (cmat == NULL))
586			return(NULL);
587			dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
588			if (dnew == NULL)
589			return(NULL);
590	greg	2.6	dnew->dtype = msrc->dtype;
591	greg	2.1	for (i = dnew->nrows; i--; )
592			for (j = dnew->ncols; j--; )
593			for (kd = dnew->ncomp; kd--; ) {
594			double d = 0;
595			for (ks = msrc->ncomp; ks--; )
596			d += cmat[kdmsrc->ncomp + ks] rmx_lval(msrc,i,j,ks);
597			rmx_lval(dnew,i,j,kd) = d;
598			}
599			return(dnew);
600			}
601
602			/* Convert a color matrix to newly allocated RMATRIX buffer */
603			RMATRIX *
604			rmx_from_cmatrix(const CMATRIX *cm)
605			{
606			int i, j;
607			RMATRIX *dnew;
608
609			if (cm == NULL)
610			return(NULL);
611			dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
612			if (dnew == NULL)
613			return(NULL);
614	greg	2.6	dnew->dtype = DTfloat;
615	greg	2.1	for (i = dnew->nrows; i--; )
616			for (j = dnew->ncols; j--; ) {
617			const COLORV *cv = cm_lval(cm,i,j);
618			rmx_lval(dnew,i,j,0) = cv[0];
619			rmx_lval(dnew,i,j,1) = cv[1];
620			rmx_lval(dnew,i,j,2) = cv[2];
621			}
622			return(dnew);
623			}
624
625			/* Convert general matrix to newly allocated CMATRIX buffer */
626			CMATRIX *
627			cm_from_rmatrix(const RMATRIX *rm)
628			{
629			int i, j;
630			CMATRIX *cnew;
631
632			if (rm == NULL \|\| rm->ncomp != 3)
633			return(NULL);
634			cnew = cm_alloc(rm->nrows, rm->ncols);
635			if (cnew == NULL)
636			return(NULL);
637			for (i = cnew->nrows; i--; )
638			for (j = cnew->ncols; j--; ) {
639			COLORV *cv = cm_lval(cnew,i,j);
640			cv[0] = (COLORV)rmx_lval(rm,i,j,0);
641			cv[1] = (COLORV)rmx_lval(rm,i,j,1);
642			cv[2] = (COLORV)rmx_lval(rm,i,j,2);
643			}
644			return(cnew);
645			}