src/util/rmatrix.c

#ifndef lint
static const char RCSid[] = "$Id: rmatrix.c,v 2.19 2016/02/02 18:02:32 greg Exp $";
#endif
/*
 * General matrix operations.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "platform.h"
#include "resolu.h"
#include "paths.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>";
#if defined(_WIN32) || defined(_WIN64)
                _setmode(fileno(stdin), _O_BINARY);
#endif
        } else if (inspec[0] == '!') {
                if ((fp = popen(inspec+1, "r")) == NULL)
                        return(NULL);
#if defined(_WIN32) || defined(_WIN64)
                _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:
#if defined(_WIN32) || defined(_WIN64)
                _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:	2.20
Committed:	Sun Mar 6 01:13:18 2016 UTC (8 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.19:	+5 -4 lines
Log Message:	Prepare for SCons build on Win32 and Win64
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.20	static const char RCSid[] = "$Id: rmatrix.c,v 2.19 2016/02/02 18:02:32 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	schorsch	2.20	#include "platform.h"
13	greg	2.1	#include "resolu.h"
14	greg	2.19	#include "paths.h"
15	greg	2.1	#include "rmatrix.h"
16
17	greg	2.6	static char rmx_mismatch_warn[] = "WARNING: data type mismatch\n";
18	greg	2.1
19			/* Allocate a nr x nc matrix with n components */
20			RMATRIX *
21			rmx_alloc(int nr, int nc, int n)
22			{
23			RMATRIX *dnew;
24
25			if ((nr <= 0) \| (nc <= 0) \| (n <= 0))
26			return(NULL);
27			dnew = (RMATRIX *)malloc(sizeof(RMATRIX)-sizeof(dnew->mtx) +
28			sizeof(dnew->mtx[0])(nnr*nc));
29			if (dnew == NULL)
30			return(NULL);
31			dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
32	greg	2.6	dnew->dtype = DTdouble;
33	greg	2.5	dnew->info = NULL;
34	greg	2.1	return(dnew);
35			}
36
37	greg	2.6	/* Free a RMATRIX array */
38			void
39			rmx_free(RMATRIX *rm)
40			{
41			if (!rm) return;
42			if (rm->info)
43			free(rm->info);
44			free(rm);
45			}
46
47			/* Resolve data type based on two input types (returns 0 for mismatch) */
48			int
49			rmx_newtype(int dtyp1, int dtyp2)
50			{
51	greg	2.14	if ((dtyp1==DTxyze) \| (dtyp1==DTrgbe) \|
52			(dtyp2==DTxyze) \| (dtyp2==DTrgbe)
53			&& dtyp1 != dtyp2)
54	greg	2.6	return(0);
55			if (dtyp1 < dtyp2)
56			return(dtyp1);
57			return(dtyp2);
58			}
59
60	greg	2.5	/* Append header information associated with matrix data */
61			int
62			rmx_addinfo(RMATRIX rm, const char info)
63			{
64			if (!info \|\| !*info)
65			return(0);
66	greg	2.8	if (!rm->info) {
67	greg	2.5	rm->info = (char *)malloc(strlen(info)+1);
68	greg	2.8	if (rm->info) rm->info[0] = '\0';
69			} else
70	greg	2.5	rm->info = (char *)realloc(rm->info,
71			strlen(rm->info)+strlen(info)+1);
72			if (!rm->info)
73			return(0);
74			strcat(rm->info, info);
75			return(1);
76			}
77
78	greg	2.1	static int
79			get_dminfo(char s, void p)
80			{
81	greg	2.6	RMATRIX ip = (RMATRIX )p;
82	greg	2.5	char fmt[64];
83	greg	2.1	int i;
84
85	greg	2.6	if (headidval(fmt, s))
86			return(0);
87	greg	2.1	if (!strncmp(s, "NCOMP=", 6)) {
88			ip->ncomp = atoi(s+6);
89			return(0);
90			}
91			if (!strncmp(s, "NROWS=", 6)) {
92			ip->nrows = atoi(s+6);
93			return(0);
94			}
95			if (!strncmp(s, "NCOLS=", 6)) {
96			ip->ncols = atoi(s+6);
97			return(0);
98			}
99	greg	2.5	if (!formatval(fmt, s)) {
100	greg	2.6	rmx_addinfo(ip, s);
101	greg	2.1	return(0);
102	greg	2.5	}
103	greg	2.1	for (i = 1; i < DTend; i++)
104			if (!strcmp(fmt, cm_fmt_id[i])) {
105			ip->dtype = i;
106			return(0);
107			}
108			return(-1);
109			}
110
111			static int
112			rmx_load_ascii(RMATRIX rm, FILE fp)
113			{
114			int i, j, k;
115	greg	2.17
116	greg	2.1	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	schorsch	2.20	#if defined(_WIN32) \|\| defined(_WIN64)
198	greg	2.7	_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	schorsch	2.20	#if defined(_WIN32) \|\| defined(_WIN64)
204	greg	2.13	_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	greg	2.18	dnew->dtype = DTascii;
219	greg	2.1	return(dnew);
220			}
221			/* else open it ourselves */
222	greg	2.13	if ((fp = fopen(inspec, "rb")) == NULL)
223	greg	2.1	return(NULL);
224			}
225			#ifdef getc_unlocked
226			flockfile(fp);
227			#endif
228			dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
229	greg	2.6	dinfo.dtype = DTascii; /* assumed w/o FORMAT */
230			dinfo.info = NULL;
231	greg	2.3	if (getheader(fp, get_dminfo, &dinfo) < 0) {
232	greg	2.1	fclose(fp);
233			return(NULL);
234			}
235	greg	2.4	if ((dinfo.nrows <= 0) \| (dinfo.ncols <= 0)) {
236	greg	2.1	if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
237			fclose(fp);
238			return(NULL);
239			}
240	greg	2.4	if (dinfo.ncomp <= 0)
241			dinfo.ncomp = 3;
242			else if ((dinfo.dtype == DTrgbe) \| (dinfo.dtype == DTxyze) &&
243			dinfo.ncomp != 3) {
244			fclose(fp);
245			return(NULL);
246			}
247	greg	2.1	}
248			dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
249			if (dnew == NULL) {
250			fclose(fp);
251			return(NULL);
252			}
253	greg	2.6	dnew->info = dinfo.info;
254	greg	2.1	switch (dinfo.dtype) {
255			case DTascii:
256	schorsch	2.20	#if defined(_WIN32) \|\| defined(_WIN64)
257	greg	2.17	_setmode(fileno(fp), _O_TEXT);
258			#endif
259	greg	2.1	if (!rmx_load_ascii(dnew, fp))
260			goto loaderr;
261	greg	2.11	dnew->dtype = DTascii; /* should leave double? */
262	greg	2.1	break;
263			case DTfloat:
264			if (!rmx_load_float(dnew, fp))
265			goto loaderr;
266	greg	2.6	dnew->dtype = DTfloat;
267	greg	2.1	break;
268			case DTdouble:
269			if (!rmx_load_double(dnew, fp))
270			goto loaderr;
271	greg	2.6	dnew->dtype = DTdouble;
272	greg	2.1	break;
273			case DTrgbe:
274			case DTxyze:
275			if (!rmx_load_rgbe(dnew, fp))
276			goto loaderr;
277	greg	2.6	dnew->dtype = dinfo.dtype;
278	greg	2.1	break;
279			default:
280			goto loaderr;
281			}
282	greg	2.13	if (fp != stdin) {
283			if (inspec[0] == '!')
284			pclose(fp);
285			else
286			fclose(fp);
287			}
288			#ifdef getc_unlocked
289			else
290			funlockfile(fp);
291			#endif
292	greg	2.1	return(dnew);
293			loaderr: /* should report error? */
294	greg	2.13	if (inspec[0] == '!')
295			pclose(fp);
296			else
297			fclose(fp);
298	greg	2.1	rmx_free(dnew);
299			return(NULL);
300			}
301
302			static int
303			rmx_write_ascii(const RMATRIX rm, FILE fp)
304			{
305			int i, j, k;
306	greg	2.17
307	greg	2.1	for (i = 0; i < rm->nrows; i++) {
308			for (j = 0; j < rm->ncols; j++) {
309			for (k = 0; k < rm->ncomp; k++)
310			fprintf(fp, " %.15e", rmx_lval(rm,i,j,k));
311			fputc('\t', fp);
312			}
313			fputc('\n', fp);
314			}
315			return(1);
316			}
317
318			static int
319			rmx_write_float(const RMATRIX rm, FILE fp)
320			{
321			int i, j, k;
322			float val[100];
323
324			if (rm->ncomp > 100) {
325			fputs("Unsupported # components in rmx_write_float()\n", stderr);
326			exit(1);
327			}
328			for (i = 0; i < rm->nrows; i++)
329			for (j = 0; j < rm->ncols; j++) {
330			for (k = rm->ncomp; k--; )
331			val[k] = (float)rmx_lval(rm,i,j,k);
332			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
333			return(0);
334			}
335			return(1);
336			}
337
338			static int
339			rmx_write_double(const RMATRIX rm, FILE fp)
340			{
341			int i, j, k;
342			double val[100];
343
344			if (rm->ncomp > 100) {
345			fputs("Unsupported # components in rmx_write_double()\n", stderr);
346			exit(1);
347			}
348			for (i = 0; i < rm->nrows; i++)
349			for (j = 0; j < rm->ncols; j++) {
350			for (k = rm->ncomp; k--; )
351			val[k] = rmx_lval(rm,i,j,k);
352			if (fwrite(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
353			return(0);
354			}
355			return(1);
356			}
357
358			static int
359			rmx_write_rgbe(const RMATRIX rm, FILE fp)
360			{
361			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
362			int i, j;
363
364			if (scan == NULL)
365			return(0);
366			for (i = 0; i < rm->nrows; i++) {
367			for (j = rm->ncols; j--; )
368			setcolor(scan[j], rmx_lval(rm,i,j,0),
369			rmx_lval(rm,i,j,1),
370			rmx_lval(rm,i,j,2) );
371			if (fwritescan(scan, rm->ncols, fp) < 0) {
372			free(scan);
373			return(0);
374			}
375			}
376			free(scan);
377			return(1);
378			}
379
380	greg	2.6	/* Write matrix to file type indicated by dtype */
381	greg	2.10	int
382	greg	2.1	rmx_write(const RMATRIX rm, int dtype, FILE fp)
383			{
384			RMATRIX *mydm = NULL;
385			int ok = 1;
386
387			if ((rm == NULL) \| (fp == NULL))
388			return(0);
389	greg	2.17	#ifdef getc_unlocked
390			flockfile(fp);
391			#endif
392	greg	2.1	/* complete header */
393	greg	2.5	if (rm->info)
394			fputs(rm->info, fp);
395	greg	2.6	if (dtype == DTfromHeader)
396			dtype = rm->dtype;
397			else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
398			dtype = DTxyze;
399	greg	2.9	else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
400	greg	2.6	dtype = DTrgbe;
401	greg	2.1	if ((dtype != DTrgbe) & (dtype != DTxyze)) {
402			fprintf(fp, "NROWS=%d\n", rm->nrows);
403			fprintf(fp, "NCOLS=%d\n", rm->ncols);
404			fprintf(fp, "NCOMP=%d\n", rm->ncomp);
405			} else if (rm->ncomp != 3) { /* wrong # components? */
406			double cmtx[3];
407			if (rm->ncomp != 1) /* only convert grayscale */
408			return(0);
409			cmtx[0] = cmtx[1] = cmtx[2] = 1;
410			mydm = rmx_transform(rm, 3, cmtx);
411			if (mydm == NULL)
412			return(0);
413			rm = mydm;
414			}
415			fputformat((char *)cm_fmt_id[dtype], fp);
416			fputc('\n', fp);
417			switch (dtype) { /* write data */
418			case DTascii:
419			ok = rmx_write_ascii(rm, fp);
420			break;
421			case DTfloat:
422			ok = rmx_write_float(rm, fp);
423			break;
424			case DTdouble:
425			ok = rmx_write_double(rm, fp);
426			break;
427			case DTrgbe:
428			case DTxyze:
429			fprtresolu(rm->ncols, rm->nrows, fp);
430			ok = rmx_write_rgbe(rm, fp);
431			break;
432			default:
433			return(0);
434			}
435			ok &= (fflush(fp) == 0);
436	greg	2.17	#ifdef getc_unlocked
437			funlockfile(fp);
438			#endif
439	greg	2.1	rmx_free(mydm);
440	greg	2.10	return(ok);
441	greg	2.1	}
442
443			/* Allocate and assign square identity matrix with n components */
444			RMATRIX *
445			rmx_identity(const int dim, const int n)
446			{
447			RMATRIX *rid = rmx_alloc(dim, dim, n);
448	greg	2.12	int i, k;
449	greg	2.1
450			if (rid == NULL)
451			return(NULL);
452	greg	2.12	memset(rid->mtx, 0, sizeof(rid->mtx[0])ndim*dim);
453	greg	2.1	for (i = dim; i--; )
454	greg	2.12	for (k = n; k--; )
455			rmx_lval(rid,i,i,k) = 1;
456	greg	2.1	return(rid);
457			}
458
459			/* Duplicate the given matrix */
460			RMATRIX *
461			rmx_copy(const RMATRIX *rm)
462			{
463			RMATRIX *dnew;
464
465			if (rm == NULL)
466			return(NULL);
467			dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
468			if (dnew == NULL)
469			return(NULL);
470	greg	2.5	rmx_addinfo(dnew, rm->info);
471	greg	2.6	dnew->dtype = rm->dtype;
472	greg	2.1	memcpy(dnew->mtx, rm->mtx,
473			sizeof(rm->mtx[0])rm->ncomprm->nrows*rm->ncols);
474			return(dnew);
475			}
476
477	greg	2.2	/* Allocate and assign transposed matrix */
478			RMATRIX *
479			rmx_transpose(const RMATRIX *rm)
480	greg	2.1	{
481	greg	2.2	RMATRIX *dnew;
482	greg	2.1	int i, j, k;
483
484			if (rm == NULL)
485			return(0);
486	greg	2.2	dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
487			if (dnew == NULL)
488			return(NULL);
489	greg	2.5	if (rm->info) {
490			rmx_addinfo(dnew, rm->info);
491			rmx_addinfo(dnew, "Transposed rows and columns\n");
492			}
493	greg	2.6	dnew->dtype = rm->dtype;
494	greg	2.2	for (i = dnew->nrows; i--; )
495			for (j = dnew->ncols; j--; )
496			for (k = dnew->ncomp; k--; )
497			rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
498			return(dnew);
499	greg	2.1	}
500
501			/* Multiply (concatenate) two matrices and allocate the result */
502			RMATRIX *
503			rmx_multiply(const RMATRIX m1, const RMATRIX m2)
504			{
505			RMATRIX *mres;
506			int i, j, k, h;
507
508			if ((m1 == NULL) \| (m2 == NULL) \|\|
509			(m1->ncomp != m2->ncomp) \| (m1->ncols != m2->nrows))
510			return(NULL);
511			mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
512			if (mres == NULL)
513			return(NULL);
514	greg	2.6	i = rmx_newtype(m1->dtype, m2->dtype);
515			if (i)
516			mres->dtype = i;
517			else
518			rmx_addinfo(mres, rmx_mismatch_warn);
519	greg	2.1	for (i = mres->nrows; i--; )
520			for (j = mres->ncols; j--; )
521	greg	2.8	for (k = mres->ncomp; k--; ) {
522	greg	2.1	long double d = 0;
523	greg	2.8	for (h = m1->ncols; h--; )
524	greg	2.16	d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k);
525	greg	2.1	rmx_lval(mres,i,j,k) = (double)d;
526			}
527			return(mres);
528			}
529
530			/* Sum second matrix into first, applying scale factor beforehand */
531			int
532			rmx_sum(RMATRIX msum, const RMATRIX madd, const double sf[])
533			{
534			double *mysf = NULL;
535			int i, j, k;
536
537			if ((msum == NULL) \| (madd == NULL) \|\|
538			(msum->nrows != madd->nrows) \|
539			(msum->ncols != madd->ncols) \|
540			(msum->ncomp != madd->ncomp))
541			return(0);
542			if (sf == NULL) {
543			mysf = (double )malloc(sizeof(double)msum->ncomp);
544			if (mysf == NULL)
545			return(0);
546			for (k = msum->ncomp; k--; )
547			mysf[k] = 1;
548			sf = mysf;
549			}
550	greg	2.6	i = rmx_newtype(msum->dtype, madd->dtype);
551			if (i)
552			msum->dtype = i;
553			else
554			rmx_addinfo(msum, rmx_mismatch_warn);
555	greg	2.1	for (i = msum->nrows; i--; )
556			for (j = msum->ncols; j--; )
557			for (k = msum->ncomp; k--; )
558			rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);
559
560			free(mysf);
561			return(1);
562			}
563
564			/* Scale the given matrix by the indicated scalar component vector */
565			int
566			rmx_scale(RMATRIX *rm, const double sf[])
567			{
568			int i, j, k;
569
570			if ((rm == NULL) \| (sf == NULL))
571			return(0);
572			for (i = rm->nrows; i--; )
573			for (j = rm->ncols; j--; )
574			for (k = rm->ncomp; k--; )
575			rmx_lval(rm,i,j,k) *= sf[k];
576
577			return(1);
578			}
579
580			/* Allocate new matrix and apply component transformation */
581			RMATRIX *
582			rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
583			{
584			int i, j, ks, kd;
585			RMATRIX *dnew;
586
587			if ((msrc == NULL) \| (n <= 0) \| (cmat == NULL))
588			return(NULL);
589			dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
590			if (dnew == NULL)
591			return(NULL);
592	greg	2.6	dnew->dtype = msrc->dtype;
593	greg	2.1	for (i = dnew->nrows; i--; )
594			for (j = dnew->ncols; j--; )
595			for (kd = dnew->ncomp; kd--; ) {
596			double d = 0;
597			for (ks = msrc->ncomp; ks--; )
598			d += cmat[kdmsrc->ncomp + ks] rmx_lval(msrc,i,j,ks);
599			rmx_lval(dnew,i,j,kd) = d;
600			}
601			return(dnew);
602			}
603
604			/* Convert a color matrix to newly allocated RMATRIX buffer */
605			RMATRIX *
606			rmx_from_cmatrix(const CMATRIX *cm)
607			{
608			int i, j;
609			RMATRIX *dnew;
610
611			if (cm == NULL)
612			return(NULL);
613			dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
614			if (dnew == NULL)
615			return(NULL);
616	greg	2.6	dnew->dtype = DTfloat;
617	greg	2.1	for (i = dnew->nrows; i--; )
618			for (j = dnew->ncols; j--; ) {
619			const COLORV *cv = cm_lval(cm,i,j);
620			rmx_lval(dnew,i,j,0) = cv[0];
621			rmx_lval(dnew,i,j,1) = cv[1];
622			rmx_lval(dnew,i,j,2) = cv[2];
623			}
624			return(dnew);
625			}
626
627			/* Convert general matrix to newly allocated CMATRIX buffer */
628			CMATRIX *
629			cm_from_rmatrix(const RMATRIX *rm)
630			{
631			int i, j;
632			CMATRIX *cnew;
633
634			if (rm == NULL \|\| rm->ncomp != 3)
635			return(NULL);
636			cnew = cm_alloc(rm->nrows, rm->ncols);
637			if (cnew == NULL)
638			return(NULL);
639			for (i = cnew->nrows; i--; )
640			for (j = cnew->ncols; j--; ) {
641			COLORV *cv = cm_lval(cnew,i,j);
642			cv[0] = (COLORV)rmx_lval(rm,i,j,0);
643			cv[1] = (COLORV)rmx_lval(rm,i,j,1);
644			cv[2] = (COLORV)rmx_lval(rm,i,j,2);
645			}
646			return(cnew);
647			}