src/util/rmatrix.c

#ifndef lint
static const char RCSid[] = "$Id: rmatrix.c,v 2.45 2021/01/15 02:46:28 greg Exp $";
#endif
/*
 * General matrix operations.
 */

#include <stdlib.h>
#include <errno.h>
#include "rtio.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)
                return(NULL);
        dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
        dnew->dtype = DTdouble;
        dnew->swapin = 0;
        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 (!rm || !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[MAXFMTLEN];
        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 ((i = isbigendian(s)) >= 0) {
                ip->swapin = (nativebigendian() != i);
                return(0);
        }
        if (isexpos(s)) {
                double  d = exposval(s);
                scalecolor(ip->mtx, d);
                return(0);
        }
        if (iscolcor(s)) {
                COLOR   ctmp;
                colcorval(ctmp, s);
                multcolor(ip->mtx, ctmp);
                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 (getbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
                    return(0);
                if (rm->swapin)
                    swap32((char *)val, rm->ncomp);
                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;

        if ((char *)&rmx_lval(rm,1,0,0) - (char *)&rmx_lval(rm,0,0,0) !=
                                        sizeof(double)*rm->ncols*rm->ncomp) {
                fputs("Code error in rmx_load_double()\n", stderr);
                exit(1);
        }
        for (i = 0; i < rm->nrows; i++) {
                if (getbinary(&rmx_lval(rm,i,0,0), sizeof(double)*rm->ncomp,
                                        rm->ncols, fp) != rm->ncols)
                        return(0);
                if (rm->swapin)
                        swap64((char *)&rmx_lval(rm,i,0,0), rm->ncols*rm->ncomp);
        }
        return(1);
}

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

        if (!scan)
                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, RMPref rmp)
{
        FILE            *fp;
        RMATRIX         dinfo;
        RMATRIX         *dnew;

        if (!inspec || !*inspec)
                return(NULL);
        if (inspec == stdin_name) {             /* reading from stdin? */
                fp = stdin;
        } else if (inspec[0] == '!') {
                if (!(fp = popen(inspec+1, "r")))
                        return(NULL);
        } 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 = rmp==RMPtrans ? cm_loadBTDF(inspec) :
                                        cm_loadBRDF(inspec, rmp==RMPreflB) ;
                        if (!cm)
                                return(NULL);
                        dnew = rmx_from_cmatrix(cm);
                        cm_free(cm);
                        dnew->dtype = DTascii;
                        return(dnew);
                }
                                                /* else open it ourselves */
                if (!(fp = fopen(inspec, "r")))
                        return(NULL);
        }
        SET_FILE_BINARY(fp);
#ifdef getc_unlocked
        flockfile(fp);
#endif
        dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
        dinfo.dtype = DTascii;                  /* assumed w/o FORMAT */
        dinfo.swapin = 0;
        dinfo.info = NULL;
        dinfo.mtx[0] = dinfo.mtx[1] = dinfo.mtx[2] = 1.;
        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) {
                fclose(fp);
                return(NULL);
        }
        dnew->info = dinfo.info;
        switch (dinfo.dtype) {
        case DTascii:
                SET_FILE_TEXT(fp);
                if (!rmx_load_ascii(dnew, fp))
                        goto loaderr;
                dnew->dtype = DTascii;          /* should leave double? */
                break;
        case DTfloat:
                dnew->swapin = dinfo.swapin;
                if (!rmx_load_float(dnew, fp))
                        goto loaderr;
                dnew->dtype = DTfloat;
                break;
        case DTdouble:
                dnew->swapin = dinfo.swapin;
                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;      /* undo exposure? */
                if ((dinfo.mtx[0] != 1.) | (dinfo.mtx[1] != 1.) |
                                (dinfo.mtx[2] != 1.)) {
                        dinfo.mtx[0] = 1./dinfo.mtx[0];
                        dinfo.mtx[1] = 1./dinfo.mtx[1];
                        dinfo.mtx[2] = 1./dinfo.mtx[2];
                        rmx_scale(dnew, dinfo.mtx);
                }
                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)
{
        const char      *fmt = (rm->dtype == DTfloat) ? " %.7e" :
                        (rm->dtype == DTrgbe) | (rm->dtype == DTxyze) ? " %.3e" :
                                " %.15e" ;
        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, fmt, 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 (putbinary(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;

        for (i = 0; i < rm->nrows; i++)
            for (j = 0; j < rm->ncols; j++)
                if (putbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp)
                        return(0);
        return(1);
}

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

        if (!scan)
                return(0);
        for (i = 0; i < rm->nrows; i++) {
            for (j = rm->ncols; j--; )
                setcolr(scan[j],        rmx_lval(rm,i,j,0),
                                        rmx_lval(rm,i,j,1),
                                        rmx_lval(rm,i,j,2)      );
            if (fwritecolrs(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 | !fp)
                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)
                        return(0);
                rm = mydm;
        }
        if ((dtype == DTfloat) | (dtype == DTdouble))
                fputendian(fp);                 /* important to record */
        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
        if (mydm)
                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)
                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)
                return(NULL);
        dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
        if (!dnew)
                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)
                return(0);
        if ((rm->nrows == 1) | (rm->ncols == 1)) {
                dnew = rmx_copy(rm);
                if (!dnew)
                        return(NULL);
                dnew->nrows = rm->ncols;
                dnew->ncols = rm->nrows;
                return(dnew);
        }
        dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
        if (!dnew)
                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 | !m2 || (m1->ncomp != m2->ncomp) | (m1->ncols != m2->nrows))
                return(NULL);
        mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
        if (!mres)
                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);
}

/* Element-wise multiplication (or division) of m2 into m1 */
int
rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide)
{
        int     zeroDivides = 0;
        int     i, j, k;

        if (!m1 | !m2 || (m1->ncols != m2->ncols) | (m1->nrows != m2->nrows))
                return(0);
        if ((m2->ncomp > 1) & (m2->ncomp != m1->ncomp))
                return(0);
        i = rmx_newtype(m1->dtype, m2->dtype);
        if (i)
                m1->dtype = i;
        else
                rmx_addinfo(m1, rmx_mismatch_warn);
        for (i = m1->nrows; i--; )
            for (j = m1->ncols; j--; )
                if (divide) {
                    double      d;
                    if (m2->ncomp == 1) {
                        d = rmx_lval(m2,i,j,0);
                        if (d == 0) {
                            ++zeroDivides;
                            for (k = m1->ncomp; k--; )
                                rmx_lval(m1,i,j,k) = 0;
                        } else {
                            d = 1./d;
                            for (k = m1->ncomp; k--; )
                                rmx_lval(m1,i,j,k) *= d;
                        }
                    } else
                        for (k = m1->ncomp; k--; ) {
                            d = rmx_lval(m2,i,j,k);
                            if (d == 0) {
                                ++zeroDivides;
                                rmx_lval(m1,i,j,k) = 0;
                            } else
                                rmx_lval(m1,i,j,k) /= d;
                        }
                } else {
                    if (m2->ncomp == 1) {
                        const double    d = rmx_lval(m2,i,j,0);
                        for (k = m1->ncomp; k--; )
                            rmx_lval(m1,i,j,k) *= d;
                    } else
                        for (k = m1->ncomp; k--; )
                            rmx_lval(m1,i,j,k) *= rmx_lval(m2,i,j,k);
                }
        if (zeroDivides) {
                rmx_addinfo(m1, "WARNING: zero divide(s) corrupted results\n");
                errno = ERANGE;
        }
        return(1);
}

/* 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 | !madd ||
                        (msum->nrows != madd->nrows) |
                        (msum->ncols != madd->ncols) |
                        (msum->ncomp != madd->ncomp))
                return(0);
        if (!sf) {
                mysf = (double *)malloc(sizeof(double)*msum->ncomp);
                if (!mysf)
                        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);
        if (mysf)
                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 | !sf)
                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];

        if (rm->info)
                rmx_addinfo(rm, "Applied scalar\n");
        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 | (n <= 0) | !cmat)
                return(NULL);
        dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
        if (!dnew)
                return(NULL);
        if (msrc->info) {
                char    buf[128];
                sprintf(buf, "Applied %dx%d component transform\n",
                                dnew->ncomp, msrc->ncomp);
                rmx_addinfo(dnew, msrc->info);
                rmx_addinfo(dnew, buf);
        }
        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)
                return(NULL);
        dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
        if (!dnew)
                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 || rm->ncomp != 3)
                return(NULL);
        cnew = cm_alloc(rm->nrows, rm->ncols);
        if (!cnew)
                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:	2.46
Committed:	Tue Jan 19 23:32:00 2021 UTC (3 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.45:	+11 -9 lines
Log Message:	feat: Added -rf and -rb options to rmtxop to load XML reflectance matrices
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.46	static const char RCSid[] = "$Id: rmatrix.c,v 2.45 2021/01/15 02:46:28 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* General matrix operations.
6			*/
7
8			#include <stdlib.h>
9	greg	2.25	#include <errno.h>
10	greg	2.21	#include "rtio.h"
11	schorsch	2.20	#include "platform.h"
12	greg	2.1	#include "resolu.h"
13	greg	2.19	#include "paths.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	greg	2.45	sizeof(dnew->mtx[0])nnr*nc);
28	greg	2.33	if (!dnew)
29	greg	2.1	return(NULL);
30			dnew->nrows = nr; dnew->ncols = nc; dnew->ncomp = n;
31	greg	2.6	dnew->dtype = DTdouble;
32	greg	2.36	dnew->swapin = 0;
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	greg	2.33	if (!rm \|\| !info \|\| !*info)
65	greg	2.5	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	2.29	char fmt[MAXFMTLEN];
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	2.35	if ((i = isbigendian(s)) >= 0) {
100			ip->swapin = (nativebigendian() != i);
101			return(0);
102			}
103	greg	2.40	if (isexpos(s)) {
104			double d = exposval(s);
105			scalecolor(ip->mtx, d);
106			return(0);
107			}
108			if (iscolcor(s)) {
109			COLOR ctmp;
110			colcorval(ctmp, s);
111			multcolor(ip->mtx, ctmp);
112			return(0);
113			}
114	greg	2.5	if (!formatval(fmt, s)) {
115	greg	2.6	rmx_addinfo(ip, s);
116	greg	2.1	return(0);
117	greg	2.5	}
118	greg	2.1	for (i = 1; i < DTend; i++)
119			if (!strcmp(fmt, cm_fmt_id[i])) {
120			ip->dtype = i;
121			return(0);
122			}
123			return(-1);
124			}
125
126			static int
127			rmx_load_ascii(RMATRIX rm, FILE fp)
128			{
129			int i, j, k;
130	greg	2.17
131	greg	2.1	for (i = 0; i < rm->nrows; i++)
132			for (j = 0; j < rm->ncols; j++)
133			for (k = 0; k < rm->ncomp; k++)
134			if (fscanf(fp, "%lf", &rmx_lval(rm,i,j,k)) != 1)
135			return(0);
136			return(1);
137			}
138
139			static int
140			rmx_load_float(RMATRIX rm, FILE fp)
141			{
142			int i, j, k;
143			float val[100];
144
145			if (rm->ncomp > 100) {
146			fputs("Unsupported # components in rmx_load_float()\n", stderr);
147			exit(1);
148			}
149			for (i = 0; i < rm->nrows; i++)
150			for (j = 0; j < rm->ncols; j++) {
151	greg	2.21	if (getbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
152	greg	2.1	return(0);
153	greg	2.35	if (rm->swapin)
154			swap32((char *)val, rm->ncomp);
155	greg	2.1	for (k = rm->ncomp; k--; )
156			rmx_lval(rm,i,j,k) = val[k];
157			}
158			return(1);
159			}
160
161			static int
162			rmx_load_double(RMATRIX rm, FILE fp)
163			{
164	greg	2.41	int i;
165	greg	2.1
166	greg	2.44	if ((char )&rmx_lval(rm,1,0,0) - (char )&rmx_lval(rm,0,0,0) !=
167	greg	2.43	sizeof(double)rm->ncolsrm->ncomp) {
168	greg	2.41	fputs("Code error in rmx_load_double()\n", stderr);
169			exit(1);
170			}
171			for (i = 0; i < rm->nrows; i++) {
172			if (getbinary(&rmx_lval(rm,i,0,0), sizeof(double)*rm->ncomp,
173			rm->ncols, fp) != rm->ncols)
174			return(0);
175	greg	2.35	if (rm->swapin)
176	greg	2.41	swap64((char )&rmx_lval(rm,i,0,0), rm->ncolsrm->ncomp);
177			}
178	greg	2.1	return(1);
179			}
180
181			static int
182			rmx_load_rgbe(RMATRIX rm, FILE fp)
183			{
184			COLOR scan = (COLOR )malloc(sizeof(COLOR)*rm->ncols);
185			int i, j;
186
187	greg	2.33	if (!scan)
188	greg	2.1	return(0);
189			for (i = 0; i < rm->nrows; i++) {
190			if (freadscan(scan, rm->ncols, fp) < 0) {
191			free(scan);
192			return(0);
193			}
194			for (j = rm->ncols; j--; ) {
195			rmx_lval(rm,i,j,0) = colval(scan[j],RED);
196			rmx_lval(rm,i,j,1) = colval(scan[j],GRN);
197			rmx_lval(rm,i,j,2) = colval(scan[j],BLU);
198			}
199			}
200			free(scan);
201			return(1);
202			}
203
204			/* Load matrix from supported file type */
205			RMATRIX *
206	greg	2.46	rmx_load(const char *inspec, RMPref rmp)
207	greg	2.1	{
208	greg	2.46	FILE *fp;
209	greg	2.6	RMATRIX dinfo;
210	greg	2.1	RMATRIX *dnew;
211
212	greg	2.46	if (!inspec \|\| !*inspec)
213			return(NULL);
214			if (inspec == stdin_name) { /* reading from stdin? */
215			fp = stdin;
216	greg	2.13	} else if (inspec[0] == '!') {
217	greg	2.33	if (!(fp = popen(inspec+1, "r")))
218	greg	2.13	return(NULL);
219	greg	2.1	} else {
220	greg	2.13	const char sp = inspec; / check suffix */
221	greg	2.1	while (*sp)
222			++sp;
223	greg	2.13	while (sp > inspec && sp[-1] != '.')
224	greg	2.1	--sp;
225			if (!strcasecmp(sp, "XML")) { /* assume it's a BSDF */
226	greg	2.46	CMATRIX *cm = rmp==RMPtrans ? cm_loadBTDF(inspec) :
227			cm_loadBRDF(inspec, rmp==RMPreflB) ;
228	greg	2.33	if (!cm)
229	greg	2.1	return(NULL);
230			dnew = rmx_from_cmatrix(cm);
231			cm_free(cm);
232	greg	2.18	dnew->dtype = DTascii;
233	greg	2.1	return(dnew);
234			}
235			/* else open it ourselves */
236	greg	2.46	if (!(fp = fopen(inspec, "r")))
237	greg	2.1	return(NULL);
238			}
239	greg	2.46	SET_FILE_BINARY(fp);
240	greg	2.1	#ifdef getc_unlocked
241			flockfile(fp);
242			#endif
243			dinfo.nrows = dinfo.ncols = dinfo.ncomp = 0;
244	greg	2.6	dinfo.dtype = DTascii; /* assumed w/o FORMAT */
245	greg	2.35	dinfo.swapin = 0;
246	greg	2.6	dinfo.info = NULL;
247	greg	2.40	dinfo.mtx[0] = dinfo.mtx[1] = dinfo.mtx[2] = 1.;
248	greg	2.3	if (getheader(fp, get_dminfo, &dinfo) < 0) {
249	greg	2.1	fclose(fp);
250			return(NULL);
251			}
252	greg	2.4	if ((dinfo.nrows <= 0) \| (dinfo.ncols <= 0)) {
253	greg	2.1	if (!fscnresolu(&dinfo.ncols, &dinfo.nrows, fp)) {
254			fclose(fp);
255			return(NULL);
256			}
257	greg	2.4	if (dinfo.ncomp <= 0)
258			dinfo.ncomp = 3;
259			else if ((dinfo.dtype == DTrgbe) \| (dinfo.dtype == DTxyze) &&
260			dinfo.ncomp != 3) {
261			fclose(fp);
262			return(NULL);
263			}
264	greg	2.1	}
265			dnew = rmx_alloc(dinfo.nrows, dinfo.ncols, dinfo.ncomp);
266	greg	2.33	if (!dnew) {
267	greg	2.1	fclose(fp);
268			return(NULL);
269			}
270	greg	2.6	dnew->info = dinfo.info;
271	greg	2.1	switch (dinfo.dtype) {
272			case DTascii:
273	greg	2.37	SET_FILE_TEXT(fp);
274	greg	2.1	if (!rmx_load_ascii(dnew, fp))
275			goto loaderr;
276	greg	2.11	dnew->dtype = DTascii; /* should leave double? */
277	greg	2.1	break;
278			case DTfloat:
279	greg	2.35	dnew->swapin = dinfo.swapin;
280	greg	2.1	if (!rmx_load_float(dnew, fp))
281			goto loaderr;
282	greg	2.6	dnew->dtype = DTfloat;
283	greg	2.1	break;
284			case DTdouble:
285	greg	2.35	dnew->swapin = dinfo.swapin;
286	greg	2.1	if (!rmx_load_double(dnew, fp))
287			goto loaderr;
288	greg	2.6	dnew->dtype = DTdouble;
289	greg	2.1	break;
290			case DTrgbe:
291			case DTxyze:
292			if (!rmx_load_rgbe(dnew, fp))
293			goto loaderr;
294	greg	2.40	dnew->dtype = dinfo.dtype; /* undo exposure? */
295			if ((dinfo.mtx[0] != 1.) \| (dinfo.mtx[1] != 1.) \|
296			(dinfo.mtx[2] != 1.)) {
297			dinfo.mtx[0] = 1./dinfo.mtx[0];
298			dinfo.mtx[1] = 1./dinfo.mtx[1];
299			dinfo.mtx[2] = 1./dinfo.mtx[2];
300			rmx_scale(dnew, dinfo.mtx);
301			}
302	greg	2.1	break;
303			default:
304			goto loaderr;
305			}
306	greg	2.13	if (fp != stdin) {
307			if (inspec[0] == '!')
308			pclose(fp);
309			else
310			fclose(fp);
311			}
312			#ifdef getc_unlocked
313			else
314			funlockfile(fp);
315			#endif
316	greg	2.1	return(dnew);
317			loaderr: /* should report error? */
318	greg	2.13	if (inspec[0] == '!')
319			pclose(fp);
320			else
321			fclose(fp);
322	greg	2.1	rmx_free(dnew);
323			return(NULL);
324			}
325
326			static int
327			rmx_write_ascii(const RMATRIX rm, FILE fp)
328			{
329	greg	2.30	const char *fmt = (rm->dtype == DTfloat) ? " %.7e" :
330			(rm->dtype == DTrgbe) \| (rm->dtype == DTxyze) ? " %.3e" :
331			" %.15e" ;
332	greg	2.1	int i, j, k;
333	greg	2.17
334	greg	2.1	for (i = 0; i < rm->nrows; i++) {
335			for (j = 0; j < rm->ncols; j++) {
336			for (k = 0; k < rm->ncomp; k++)
337	greg	2.30	fprintf(fp, fmt, rmx_lval(rm,i,j,k));
338	greg	2.1	fputc('\t', fp);
339			}
340			fputc('\n', fp);
341			}
342			return(1);
343			}
344
345			static int
346			rmx_write_float(const RMATRIX rm, FILE fp)
347			{
348			int i, j, k;
349			float val[100];
350
351			if (rm->ncomp > 100) {
352			fputs("Unsupported # components in rmx_write_float()\n", stderr);
353			exit(1);
354			}
355			for (i = 0; i < rm->nrows; i++)
356			for (j = 0; j < rm->ncols; j++) {
357			for (k = rm->ncomp; k--; )
358			val[k] = (float)rmx_lval(rm,i,j,k);
359	greg	2.21	if (putbinary(val, sizeof(val[0]), rm->ncomp, fp) != rm->ncomp)
360	greg	2.1	return(0);
361			}
362			return(1);
363			}
364
365			static int
366			rmx_write_double(const RMATRIX rm, FILE fp)
367			{
368	greg	2.26	int i, j;
369	greg	2.1
370			for (i = 0; i < rm->nrows; i++)
371	greg	2.26	for (j = 0; j < rm->ncols; j++)
372			if (putbinary(&rmx_lval(rm,i,j,0), sizeof(double), rm->ncomp, fp) != rm->ncomp)
373	greg	2.1	return(0);
374			return(1);
375			}
376
377			static int
378			rmx_write_rgbe(const RMATRIX rm, FILE fp)
379			{
380	greg	2.27	COLR scan = (COLR )malloc(sizeof(COLR)*rm->ncols);
381	greg	2.1	int i, j;
382
383	greg	2.33	if (!scan)
384	greg	2.1	return(0);
385			for (i = 0; i < rm->nrows; i++) {
386			for (j = rm->ncols; j--; )
387	greg	2.27	setcolr(scan[j], rmx_lval(rm,i,j,0),
388	greg	2.1	rmx_lval(rm,i,j,1),
389			rmx_lval(rm,i,j,2) );
390	greg	2.27	if (fwritecolrs(scan, rm->ncols, fp) < 0) {
391	greg	2.1	free(scan);
392			return(0);
393			}
394			}
395			free(scan);
396			return(1);
397			}
398
399	greg	2.6	/* Write matrix to file type indicated by dtype */
400	greg	2.10	int
401	greg	2.1	rmx_write(const RMATRIX rm, int dtype, FILE fp)
402			{
403			RMATRIX *mydm = NULL;
404			int ok = 1;
405
406	greg	2.33	if (!rm \| !fp)
407	greg	2.1	return(0);
408	greg	2.17	#ifdef getc_unlocked
409			flockfile(fp);
410			#endif
411	greg	2.1	/* complete header */
412	greg	2.5	if (rm->info)
413			fputs(rm->info, fp);
414	greg	2.6	if (dtype == DTfromHeader)
415			dtype = rm->dtype;
416			else if ((dtype == DTrgbe) & (rm->dtype == DTxyze))
417			dtype = DTxyze;
418	greg	2.9	else if ((dtype == DTxyze) & (rm->dtype == DTrgbe))
419	greg	2.6	dtype = DTrgbe;
420	greg	2.1	if ((dtype != DTrgbe) & (dtype != DTxyze)) {
421			fprintf(fp, "NROWS=%d\n", rm->nrows);
422			fprintf(fp, "NCOLS=%d\n", rm->ncols);
423			fprintf(fp, "NCOMP=%d\n", rm->ncomp);
424			} else if (rm->ncomp != 3) { /* wrong # components? */
425			double cmtx[3];
426			if (rm->ncomp != 1) /* only convert grayscale */
427			return(0);
428			cmtx[0] = cmtx[1] = cmtx[2] = 1;
429			mydm = rmx_transform(rm, 3, cmtx);
430	greg	2.33	if (!mydm)
431	greg	2.1	return(0);
432			rm = mydm;
433			}
434	greg	2.35	if ((dtype == DTfloat) \| (dtype == DTdouble))
435			fputendian(fp); /* important to record */
436	greg	2.1	fputformat((char *)cm_fmt_id[dtype], fp);
437			fputc('\n', fp);
438			switch (dtype) { /* write data */
439			case DTascii:
440			ok = rmx_write_ascii(rm, fp);
441			break;
442			case DTfloat:
443			ok = rmx_write_float(rm, fp);
444			break;
445			case DTdouble:
446			ok = rmx_write_double(rm, fp);
447			break;
448			case DTrgbe:
449			case DTxyze:
450			fprtresolu(rm->ncols, rm->nrows, fp);
451			ok = rmx_write_rgbe(rm, fp);
452			break;
453			default:
454			return(0);
455			}
456			ok &= (fflush(fp) == 0);
457	greg	2.17	#ifdef getc_unlocked
458			funlockfile(fp);
459			#endif
460	greg	2.33	if (mydm)
461			rmx_free(mydm);
462	greg	2.10	return(ok);
463	greg	2.1	}
464
465			/* Allocate and assign square identity matrix with n components */
466			RMATRIX *
467			rmx_identity(const int dim, const int n)
468			{
469			RMATRIX *rid = rmx_alloc(dim, dim, n);
470	greg	2.12	int i, k;
471	greg	2.1
472	greg	2.33	if (!rid)
473	greg	2.1	return(NULL);
474	greg	2.12	memset(rid->mtx, 0, sizeof(rid->mtx[0])ndim*dim);
475	greg	2.1	for (i = dim; i--; )
476	greg	2.12	for (k = n; k--; )
477			rmx_lval(rid,i,i,k) = 1;
478	greg	2.1	return(rid);
479			}
480
481			/* Duplicate the given matrix */
482			RMATRIX *
483			rmx_copy(const RMATRIX *rm)
484			{
485			RMATRIX *dnew;
486
487	greg	2.33	if (!rm)
488	greg	2.1	return(NULL);
489			dnew = rmx_alloc(rm->nrows, rm->ncols, rm->ncomp);
490	greg	2.33	if (!dnew)
491	greg	2.1	return(NULL);
492	greg	2.5	rmx_addinfo(dnew, rm->info);
493	greg	2.6	dnew->dtype = rm->dtype;
494	greg	2.1	memcpy(dnew->mtx, rm->mtx,
495			sizeof(rm->mtx[0])rm->ncomprm->nrows*rm->ncols);
496			return(dnew);
497			}
498
499	greg	2.2	/* Allocate and assign transposed matrix */
500			RMATRIX *
501			rmx_transpose(const RMATRIX *rm)
502	greg	2.1	{
503	greg	2.2	RMATRIX *dnew;
504	greg	2.1	int i, j, k;
505
506	greg	2.33	if (!rm)
507	greg	2.1	return(0);
508	greg	2.31	if ((rm->nrows == 1) \| (rm->ncols == 1)) {
509			dnew = rmx_copy(rm);
510	greg	2.33	if (!dnew)
511	greg	2.32	return(NULL);
512	greg	2.31	dnew->nrows = rm->ncols;
513			dnew->ncols = rm->nrows;
514			return(dnew);
515			}
516	greg	2.2	dnew = rmx_alloc(rm->ncols, rm->nrows, rm->ncomp);
517	greg	2.33	if (!dnew)
518	greg	2.2	return(NULL);
519	greg	2.5	if (rm->info) {
520			rmx_addinfo(dnew, rm->info);
521			rmx_addinfo(dnew, "Transposed rows and columns\n");
522			}
523	greg	2.6	dnew->dtype = rm->dtype;
524	greg	2.2	for (i = dnew->nrows; i--; )
525			for (j = dnew->ncols; j--; )
526			for (k = dnew->ncomp; k--; )
527			rmx_lval(dnew,i,j,k) = rmx_lval(rm,j,i,k);
528			return(dnew);
529	greg	2.1	}
530
531			/* Multiply (concatenate) two matrices and allocate the result */
532			RMATRIX *
533			rmx_multiply(const RMATRIX m1, const RMATRIX m2)
534			{
535			RMATRIX *mres;
536			int i, j, k, h;
537
538	greg	2.33	if (!m1 \| !m2 \|\| (m1->ncomp != m2->ncomp) \| (m1->ncols != m2->nrows))
539	greg	2.1	return(NULL);
540			mres = rmx_alloc(m1->nrows, m2->ncols, m1->ncomp);
541	greg	2.33	if (!mres)
542	greg	2.1	return(NULL);
543	greg	2.6	i = rmx_newtype(m1->dtype, m2->dtype);
544			if (i)
545			mres->dtype = i;
546			else
547			rmx_addinfo(mres, rmx_mismatch_warn);
548	greg	2.1	for (i = mres->nrows; i--; )
549			for (j = mres->ncols; j--; )
550	greg	2.8	for (k = mres->ncomp; k--; ) {
551	greg	2.1	long double d = 0;
552	greg	2.8	for (h = m1->ncols; h--; )
553	greg	2.24	d += rmx_lval(m1,i,h,k) * rmx_lval(m2,h,j,k);
554	greg	2.1	rmx_lval(mres,i,j,k) = (double)d;
555			}
556			return(mres);
557			}
558
559	greg	2.25	/* Element-wise multiplication (or division) of m2 into m1 */
560			int
561			rmx_elemult(RMATRIX m1, const RMATRIX m2, int divide)
562			{
563			int zeroDivides = 0;
564			int i, j, k;
565
566	greg	2.33	if (!m1 \| !m2 \|\| (m1->ncols != m2->ncols) \| (m1->nrows != m2->nrows))
567	greg	2.25	return(0);
568			if ((m2->ncomp > 1) & (m2->ncomp != m1->ncomp))
569			return(0);
570			i = rmx_newtype(m1->dtype, m2->dtype);
571			if (i)
572			m1->dtype = i;
573			else
574			rmx_addinfo(m1, rmx_mismatch_warn);
575			for (i = m1->nrows; i--; )
576			for (j = m1->ncols; j--; )
577			if (divide) {
578			double d;
579			if (m2->ncomp == 1) {
580			d = rmx_lval(m2,i,j,0);
581			if (d == 0) {
582			++zeroDivides;
583			for (k = m1->ncomp; k--; )
584			rmx_lval(m1,i,j,k) = 0;
585			} else {
586			d = 1./d;
587			for (k = m1->ncomp; k--; )
588			rmx_lval(m1,i,j,k) *= d;
589			}
590			} else
591			for (k = m1->ncomp; k--; ) {
592			d = rmx_lval(m2,i,j,k);
593			if (d == 0) {
594			++zeroDivides;
595			rmx_lval(m1,i,j,k) = 0;
596			} else
597			rmx_lval(m1,i,j,k) /= d;
598			}
599			} else {
600			if (m2->ncomp == 1) {
601			const double d = rmx_lval(m2,i,j,0);
602			for (k = m1->ncomp; k--; )
603			rmx_lval(m1,i,j,k) *= d;
604			} else
605			for (k = m1->ncomp; k--; )
606			rmx_lval(m1,i,j,k) *= rmx_lval(m2,i,j,k);
607			}
608			if (zeroDivides) {
609	greg	2.34	rmx_addinfo(m1, "WARNING: zero divide(s) corrupted results\n");
610	greg	2.25	errno = ERANGE;
611			}
612			return(1);
613			}
614
615	greg	2.1	/* Sum second matrix into first, applying scale factor beforehand */
616			int
617			rmx_sum(RMATRIX msum, const RMATRIX madd, const double sf[])
618			{
619			double *mysf = NULL;
620			int i, j, k;
621
622	greg	2.33	if (!msum \| !madd \|\|
623	greg	2.1	(msum->nrows != madd->nrows) \|
624			(msum->ncols != madd->ncols) \|
625			(msum->ncomp != madd->ncomp))
626			return(0);
627	greg	2.33	if (!sf) {
628	greg	2.1	mysf = (double )malloc(sizeof(double)msum->ncomp);
629	greg	2.33	if (!mysf)
630	greg	2.1	return(0);
631			for (k = msum->ncomp; k--; )
632			mysf[k] = 1;
633			sf = mysf;
634			}
635	greg	2.6	i = rmx_newtype(msum->dtype, madd->dtype);
636			if (i)
637			msum->dtype = i;
638			else
639			rmx_addinfo(msum, rmx_mismatch_warn);
640	greg	2.1	for (i = msum->nrows; i--; )
641			for (j = msum->ncols; j--; )
642			for (k = msum->ncomp; k--; )
643			rmx_lval(msum,i,j,k) += sf[k] * rmx_lval(madd,i,j,k);
644	greg	2.33	if (mysf)
645			free(mysf);
646	greg	2.1	return(1);
647			}
648
649			/* Scale the given matrix by the indicated scalar component vector */
650			int
651			rmx_scale(RMATRIX *rm, const double sf[])
652			{
653			int i, j, k;
654
655	greg	2.33	if (!rm \| !sf)
656	greg	2.1	return(0);
657			for (i = rm->nrows; i--; )
658			for (j = rm->ncols; j--; )
659			for (k = rm->ncomp; k--; )
660			rmx_lval(rm,i,j,k) *= sf[k];
661
662	greg	2.28	if (rm->info)
663			rmx_addinfo(rm, "Applied scalar\n");
664	greg	2.1	return(1);
665			}
666
667			/* Allocate new matrix and apply component transformation */
668			RMATRIX *
669			rmx_transform(const RMATRIX *msrc, int n, const double cmat[])
670			{
671			int i, j, ks, kd;
672			RMATRIX *dnew;
673
674	greg	2.33	if (!msrc \| (n <= 0) \| !cmat)
675	greg	2.1	return(NULL);
676			dnew = rmx_alloc(msrc->nrows, msrc->ncols, n);
677	greg	2.33	if (!dnew)
678	greg	2.1	return(NULL);
679	greg	2.28	if (msrc->info) {
680			char buf[128];
681	greg	2.38	sprintf(buf, "Applied %dx%d component transform\n",
682	greg	2.28	dnew->ncomp, msrc->ncomp);
683			rmx_addinfo(dnew, msrc->info);
684			rmx_addinfo(dnew, buf);
685			}
686	greg	2.6	dnew->dtype = msrc->dtype;
687	greg	2.1	for (i = dnew->nrows; i--; )
688			for (j = dnew->ncols; j--; )
689			for (kd = dnew->ncomp; kd--; ) {
690			double d = 0;
691			for (ks = msrc->ncomp; ks--; )
692			d += cmat[kdmsrc->ncomp + ks] rmx_lval(msrc,i,j,ks);
693			rmx_lval(dnew,i,j,kd) = d;
694			}
695			return(dnew);
696			}
697
698			/* Convert a color matrix to newly allocated RMATRIX buffer */
699			RMATRIX *
700			rmx_from_cmatrix(const CMATRIX *cm)
701			{
702			int i, j;
703			RMATRIX *dnew;
704
705	greg	2.33	if (!cm)
706	greg	2.1	return(NULL);
707			dnew = rmx_alloc(cm->nrows, cm->ncols, 3);
708	greg	2.33	if (!dnew)
709	greg	2.1	return(NULL);
710	greg	2.6	dnew->dtype = DTfloat;
711	greg	2.1	for (i = dnew->nrows; i--; )
712			for (j = dnew->ncols; j--; ) {
713			const COLORV *cv = cm_lval(cm,i,j);
714			rmx_lval(dnew,i,j,0) = cv[0];
715			rmx_lval(dnew,i,j,1) = cv[1];
716			rmx_lval(dnew,i,j,2) = cv[2];
717			}
718			return(dnew);
719			}
720
721			/* Convert general matrix to newly allocated CMATRIX buffer */
722			CMATRIX *
723			cm_from_rmatrix(const RMATRIX *rm)
724			{
725			int i, j;
726			CMATRIX *cnew;
727
728	greg	2.33	if (!rm \|\| rm->ncomp != 3)
729	greg	2.1	return(NULL);
730			cnew = cm_alloc(rm->nrows, rm->ncols);
731	greg	2.33	if (!cnew)
732	greg	2.1	return(NULL);
733			for (i = cnew->nrows; i--; )
734			for (j = cnew->ncols; j--; ) {
735			COLORV *cv = cm_lval(cnew,i,j);
736			cv[0] = (COLORV)rmx_lval(rm,i,j,0);
737			cv[1] = (COLORV)rmx_lval(rm,i,j,1);
738			cv[2] = (COLORV)rmx_lval(rm,i,j,2);
739			}
740			return(cnew);
741			}