src/util/rmtxop.c

#ifndef lint
static const char RCSid[] = "$Id: rmtxop.c,v 2.40 2025/04/04 22:47:56 greg Exp $";
#endif
/*
 * General component matrix operations.
 */

#include <errno.h>
#include "rtio.h"
#include "rmatrix.h"
#include "platform.h"

/* Preferred BSDF component:
        none, transmission, reflection front (normal side), reflection back */
typedef enum {RMPnone=-1, RMPtrans=0, RMPreflF, RMPreflB} RMPref;

/* Unary matrix operation(s) */
typedef struct {
        double          cmat[MAXCOMP*MAXCOMP];  /* component transformation */
        double          sca[MAXCOMP];           /* scalar coefficients */
        const char      *csym;                  /* symbolic coefs or file */
        short           clen;                   /* number of coefficients */
        short           nsf;                    /* number of scalars */
        short           transpose;              /* do transpose? */
} RUNARYOP;

/* Matrix input source and requested operation(s) */
typedef struct {
        const char      *inspec;                /* input specification */
        RMPref          rmp;                    /* matrix preference */
        RUNARYOP        preop;                  /* unary operation(s) */
        RMATRIX         *mtx;                   /* original matrix if loaded */
        int             binop;                  /* binary op with next (or 0) */
} ROPMAT;

int     verbose = 0;                    /* verbose reporting? */

/* Load matrix */
int
loadmatrix(ROPMAT *rop)
{
        if (rop->mtx)                   /* already loaded? */
                return(0);
                                        /* check for BSDF input */
        if ((rop->inspec[0] != '!') & (rop->rmp != RMPnone)) {
                const char      *sp = strrchr(rop->inspec, '.');
                if (sp > rop->inspec && !strcasecmp(sp+1, "XML")) {
                        CMATRIX *cm = rop->rmp==RMPtrans ? cm_loadBTDF(rop->inspec) :
                                        cm_loadBRDF(rop->inspec, rop->rmp==RMPreflB) ;
                        if (!cm)
                                return(-1);
                        rop->mtx = rmx_from_cmatrix(cm);
                        cm_free(cm);
                        rop->mtx->dtype = DTascii;
                        return(1);      /* loaded BSDF XML file */
                }
        }                               /* else load regular matrix */
        rop->mtx = rmx_load(rop->inspec);

        return(rop->mtx ? 1 : -1);
}

extern int      checksymbolic(ROPMAT *rop);

/* Check/set transform based on a reference input file */
int
checkreffile(ROPMAT *rop)
{
        static const char       *curRF = NULL;
        static RMATRIX          refm;
        const int               nc = rop->mtx->ncomp;
        int                     i;

        if (!curRF || strcmp(rop->preop.csym, curRF)) {
                FILE    *fp = fopen(rop->preop.csym, "rb");
                if (!rmx_load_header(&refm, fp)) {
                        fprintf(stderr, "%s: cannot read info header\n",
                                        rop->preop.csym);
                        curRF = NULL;
                        if (fp) fclose(fp);
                        return(-1);
                }
                fclose(fp);
                curRF = rop->preop.csym;
        }
        if (refm.ncomp == 3) {
                rop->preop.csym = (refm.dtype == DTxyze) ? "XYZ" : "RGB";
                return(checksymbolic(rop));
        }
        if (refm.ncomp == 2) {
                fprintf(stderr, "%s: cannot convert to 2 components\n",
                                curRF);
                return(-1);
        }
        if (refm.ncomp == 1) {
                rop->preop.csym = "Y";          /* XXX big assumption */
                return(checksymbolic(rop));
        }
        if (refm.ncomp == nc &&
                        !memcmp(refm.wlpart, rop->mtx->wlpart, sizeof(refm.wlpart)))
                return(0);                      /* nothing to do */

        if ((nc <= 3) | (nc > MAXCSAMP) | (refm.ncomp > MAXCSAMP)) {
                fprintf(stderr, "%s: cannot resample from %d to %d components\n",
                                curRF, nc, refm.ncomp);
                return(-1);
        }
        rop->preop.clen = refm.ncomp * nc;      /* compute spec to ref */

        for (i = 0; i < nc; i++) {
                SCOLOR  scstim, scresp;
                int     j;
                memset(scstim, 0, sizeof(COLORV)*nc);
                scstim[i] = 1.f;
                convertscolor(scresp, refm.ncomp, refm.wlpart[0], refm.wlpart[3],
                                scstim, nc, rop->mtx->wlpart[0], rop->mtx->wlpart[3]);
                for (j = refm.ncomp; j-- > 0; )
                        rop->preop.cmat[j*nc + i] = scresp[j];
        }
        memcpy(rop->mtx->wlpart, refm.wlpart, sizeof(rop->mtx->wlpart));
        return(0);
}

/* Compute conversion row from spectrum to one channel of RGB */
void
rgbrow(ROPMAT *rop, int r, int p)
{
        const int       nc = rop->mtx->ncomp;
        const float *   wlp = rop->mtx->wlpart;
        int             i;

        for (i = nc; i--; ) {
                int     nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
                int     nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
                COLOR   crgb;
                spec_rgb(crgb, nmStart, nmEnd);
                rop->preop.cmat[r*nc+i] = crgb[p];
        }
}

/* Compute conversion row from spectrum to one channel of XYZ */
void
xyzrow(ROPMAT *rop, int r, int p)
{
        const int       nc = rop->mtx->ncomp;
        const float *   wlp = rop->mtx->wlpart;
        int             i;

        for (i = nc; i--; ) {
                int     nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
                int     nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
                COLOR   cxyz;
                spec_cie(cxyz, nmStart, nmEnd);
                rop->preop.cmat[r*nc+i] = cxyz[p];
        }
}

/* Use the spectral sensitivity function to compute matrix coefficients */
void
sensrow(ROPMAT *rop, int r, double (*sf)(const SCOLOR sc, int ncs, const float wlpt[4]))
{
        const int       nc = rop->mtx->ncomp;
        int             i;

        for (i = nc; i--; ) {
                SCOLOR  sclr;
                memset(sclr, 0, sizeof(COLORV)*nc);
                sclr[i] = 1.f;
                rop->preop.cmat[r*nc+i] = (*sf)(sclr, nc, rop->mtx->wlpart);
        }
}

/* Check/set symbolic transform */
int
checksymbolic(ROPMAT *rop)
{
        const int       nc = rop->mtx->ncomp;
        const int       dt = rop->mtx->dtype;
        double          cf = 1;
        int             i, j;
                                        /* check suffix => reference file */
        if (strchr(rop->preop.csym, '.') > rop->preop.csym)
                return(checkreffile(rop));

        if (nc < 3) {
                fprintf(stderr, "%s: -c '%s' requires at least 3 components\n",
                                rop->inspec, rop->preop.csym);
                return(-1);
        }
        rop->preop.clen = strlen(rop->preop.csym) * nc;
        if (rop->preop.clen > MAXCOMP*MAXCOMP) {
                fprintf(stderr, "%s: -c '%s' results in too many components\n",
                                rop->inspec, rop->preop.csym);
                return(-1);
        }
        for (j = 0; rop->preop.csym[j]; j++) {
                int     comp = 0;
                switch (rop->preop.csym[j]) {
                case 'B':
                case 'b':
                        ++comp;
                        /* fall through */
                case 'G':
                case 'g':
                        ++comp;
                        /* fall through */
                case 'R':
                case 'r':
                        if (rop->preop.csym[j] <= 'Z')
                                cf = 1./WHTEFFICACY;
                        if (dt == DTxyze) {
                                for (i = 3; i--; )
                                        rop->preop.cmat[j*nc+i] = cf*xyz2rgbmat[comp][i];
                        } else if (nc == 3)
                                rop->preop.cmat[j*nc+comp] = 1.;
                        else
                                rgbrow(rop, j, comp);
                        break;
                case 'Z':
                case 'z':
                        ++comp;
                        /* fall through */
                case 'Y':
                case 'y':
                        ++comp;
                        /* fall through */
                case 'X':
                case 'x':
                        if ((rop->preop.csym[j] <= 'Z') & (dt != DTxyze))
                                cf = WHTEFFICACY;
                        if (dt == DTxyze) {
                                rop->preop.cmat[j*nc+comp] = 1.;
                        } else if (nc == 3) {
                                for (i = 3; i--; )
                                        rop->preop.cmat[j*nc+i] =
                                                        rgb2xyzmat[comp][i];
                        } else if (comp == CIEY)
                                sensrow(rop, j, scolor2photopic);
                        else
                                xyzrow(rop, j, comp);

                        for (i = nc*(cf != 1); i--; )
                                rop->preop.cmat[j*nc+i] *= cf;
                        break;
                case 'S':               /* scotopic (il)luminance */
                        cf = WHTSCOTOPIC;
                        /* fall through */
                case 's':
                        sensrow(rop, j, scolor2scotopic);
                        for (i = nc*(cf != 1); i--; )
                                rop->preop.cmat[j*nc+i] *= cf;
                        break;
                case 'M':               /* melanopic (il)luminance */
                        cf = WHTMELANOPIC;
                        /* fall through */
                case 'm':
                        sensrow(rop, j, scolor2melanopic);
                        for (i = nc*(cf != 1); i--; )
                                rop->preop.cmat[j*nc+i] *= cf;
                        break;
                case 'A':               /* average component */
                case 'a':
                        for (i = nc; i--; )
                                rop->preop.cmat[j*nc+i] = 1./(double)nc;
                        break;
                default:
                        fprintf(stderr, "%s: -c '%c' unsupported\n",
                                rop->inspec, rop->preop.csym[j]);
                        return(-1);
                }
        }
                                        /* return recommended output type */
        if (!strcasecmp(rop->preop.csym, "XYZ")) {
                if (dt <= DTspec)
                        return(DTxyze);
        } else if (!strcasecmp(rop->preop.csym, "RGB")) {
                if (dt <= DTspec)
                        return(DTrgbe);
        } else if (dt == DTspec)
                return(DTfloat);        /* probably not actual spectrum */
        return(0);
}

/* Get matrix and perform unary operations */
RMATRIX *
loadop(ROPMAT *rop)
{
        int     outtype = 0;
        RMATRIX *mres;
        int     i, j;

        if (loadmatrix(rop) < 0)                /* make sure we're loaded */
                return(NULL);

        if (rop->preop.csym &&                  /* symbolic transform? */
                        (outtype = checksymbolic(rop)) < 0)
                goto failure;
        if (rop->preop.clen > 0) {              /* apply component transform? */
                if (rop->preop.clen % rop->mtx->ncomp) {
                        fprintf(stderr, "%s: -c must have N x %d coefficients\n",
                                        rop->inspec, rop->mtx->ncomp);
                        goto failure;
                }
                if (rop->preop.nsf > 0) {       /* scale transform, first */
                        if (rop->preop.nsf == 1) {
                                for (i = rop->preop.clen; i--; )
                                        rop->preop.cmat[i] *= rop->preop.sca[0];
                        } else if (rop->preop.nsf*rop->mtx->ncomp != rop->preop.clen) {
                                fprintf(stderr, "%s: -s must have one or %d factors\n",
                                                rop->inspec,
                                                rop->preop.clen/rop->mtx->ncomp);
                                goto failure;
                        } else {
                                for (i = rop->preop.nsf; i--; )
                                        for (j = rop->mtx->ncomp; j--; )
                                                rop->preop.cmat[i*rop->mtx->ncomp+j]
                                                                *= rop->preop.sca[i];
                        }
                }
                mres = rmx_transform(rop->mtx, rop->preop.clen/rop->mtx->ncomp,
                                        rop->preop.cmat);
                if (mres == NULL) {
                        fprintf(stderr, "%s: matrix transform failed\n",
                                                rop->inspec);
                        goto failure;
                }
                if (verbose)
                        fprintf(stderr, "%s: applied %d x %d transform%s\n",
                                        rop->inspec, mres->ncomp,
                                        rop->mtx->ncomp,
                                        rop->preop.nsf ? " (* scalar)" : "");
                rop->preop.nsf = 0;             /* now folded in */
                if ((mres->ncomp > 3) & (mres->dtype <= DTspec))
                        outtype = DTfloat;      /* probably not actual spectrum */
                rmx_free(rop->mtx);
                rop->mtx = mres;
        }
        if (rop->preop.nsf > 0) {               /* apply scalar(s)? */
                if (rop->preop.nsf == 1) {
                        for (i = rop->mtx->ncomp; --i; )
                                rop->preop.sca[i] = rop->preop.sca[0];
                } else if (rop->preop.nsf != rop->mtx->ncomp) {
                        fprintf(stderr, "%s: -s must have one or %d factors\n",
                                        rop->inspec, rop->mtx->ncomp);
                        goto failure;
                }
                if (!rmx_scale(rop->mtx, rop->preop.sca)) {
                        fputs(rop->inspec, stderr);
                        fputs(": scalar operation failed\n", stderr);
                        goto failure;
                }
                if (verbose) {
                        fputs(rop->inspec, stderr);
                        fputs(": applied scalar (", stderr);
                        for (i = 0; i < rop->preop.nsf; i++)
                                fprintf(stderr, " %f", rop->preop.sca[i]);
                        fputs(" )\n", stderr);
                }
        }
        if (rop->preop.transpose) {             /* transpose matrix? */
                if (!rmx_transpose(rop->mtx)) {
                        fputs(rop->inspec, stderr);
                        fputs(": transpose failed\n", stderr);
                        goto failure;
                }
                if (verbose) {
                        fputs(rop->inspec, stderr);
                        fputs(": transposed rows and columns\n", stderr);
                }
        }
        mres = rop->mtx;
        rop->mtx = NULL;
        if (outtype)
                mres->dtype = outtype;
        return(mres);
failure:
        rmx_free(rop->mtx);
        return(rop->mtx = NULL);
}

/* Execute binary operation, free matrix arguments and return new result */
RMATRIX *
binaryop(const char *inspec, RMATRIX *mleft, int op, RMATRIX *mright)
{
        RMATRIX *mres = NULL;
        int     i;

        if ((mleft == NULL) | (mright == NULL))
                return(NULL);
        switch (op) {
        case '.':                       /* concatenate */
                if (mleft->ncomp != mright->ncomp) {
                        fputs(inspec, stderr);
                        fputs(": # components do not match\n", stderr);
                } else if (mleft->ncols != mright->nrows) {
                        fputs(inspec, stderr);
                        fputs(": mismatched dimensions\n",
                                        stderr);
                } else
                        mres = rmx_multiply(mleft, mright);
                rmx_free(mleft);
                rmx_free(mright);
                if (mres == NULL) {
                        fputs(inspec, stderr);
                        fputs(": concatenation failed\n", stderr);
                        return(NULL);
                }
                if (verbose) {
                        fputs(inspec, stderr);
                        fputs(": concatenated matrix\n", stderr);
                }
                break;
        case '+':
                if (!rmx_sum(mleft, mright, NULL)) {
                        fputs(inspec, stderr);
                        fputs(": matrix sum failed\n", stderr);
                        rmx_free(mleft);
                        rmx_free(mright);
                        return(NULL);
                }
                if (verbose) {
                        fputs(inspec, stderr);
                        fputs(": added in matrix\n", stderr);
                }
                rmx_free(mright);
                mres = mleft;
                break;
        case '*':
        case '/': {
                const char *    tnam = (op == '/') ?
                                        "division" : "multiplication";
                errno = 0;
                if (!rmx_elemult(mleft, mright, (op == '/'))) {
                        fprintf(stderr, "%s: element-wise %s failed\n",
                                        inspec, tnam);
                        rmx_free(mleft);
                        rmx_free(mright);
                        return(NULL);
                }
                if (errno)
                        fprintf(stderr,
                                "%s: warning - error during element-wise %s\n",
                                        inspec, tnam);
                else if (verbose)
                        fprintf(stderr, "%s: element-wise %s\n", inspec, tnam);
                rmx_free(mright);
                mres = mleft;
                } break;
        default:
                fprintf(stderr, "%s: unknown operation '%c'\n", inspec, op);
                rmx_free(mleft);
                rmx_free(mright);
                return(NULL);
        }
        return(mres);
}

/* Perform matrix operations from left to right */
RMATRIX *
op_left2right(ROPMAT *mop)
{
        RMATRIX *mleft = loadop(mop);

        while (mop->binop) {
                if (mleft == NULL)
                        break;
                mleft = binaryop(mop[1].inspec,
                                mleft, mop->binop, loadop(mop+1));
                mop++;
        }
        return(mleft);
}

/* Perform matrix operations from right to left */
RMATRIX *
op_right2left(ROPMAT *mop)
{
        RMATRIX *mright;
        int     rpos = 0;
                                        /* find end of list */
        while (mop[rpos].binop)
                if (mop[rpos++].binop != '.') {
                        fputs(
                "Right-to-left evaluation only for matrix multiplication!\n",
                                        stderr);
                        return(NULL);
                }
        mright = loadop(mop+rpos);
        while (rpos-- > 0) {
                if (mright == NULL)
                        break;
                mright = binaryop(mop[rpos+1].inspec,
                                loadop(mop+rpos), mop[rpos].binop, mright);
        }
        return(mright);
}

#define t_nrows(mop)    ((mop)->preop.transpose ? (mop)->mtx->ncols \
                                                : (mop)->mtx->nrows)
#define t_ncols(mop)    ((mop)->preop.transpose ? (mop)->mtx->nrows \
                                                : (mop)->mtx->ncols)

/* Should we prefer concatenating from rightmost matrix towards left? */
int
prefer_right2left(ROPMAT *mop)
{
        int     mri = 0;

        while (mop[mri].binop)          /* find rightmost matrix */
                if (mop[mri++].binop != '.')
                        return(0);      /* pre-empt reversal for other ops */

        if (mri <= 1)
                return(0);              /* won't matter */

        if (loadmatrix(mop+mri) < 0)    /* load rightmost cat */
                return(1);              /* fail will bail in a moment */

        if (t_ncols(mop+mri) == 1)
                return(1);              /* definitely better R->L */

        if (t_ncols(mop+mri) >= t_nrows(mop+mri))
                return(0);              /* ...probably worse */

        if (loadmatrix(mop) < 0)        /* load leftmost */
                return(0);              /* fail will bail in a moment */

        return(t_ncols(mop+mri) < t_nrows(mop));
}

int
get_factors(double da[], int n, char *av[])
{
        int     ac;

        for (ac = 0; ac < n && isflt(av[ac]); ac++)
                da[ac] = atof(av[ac]);
        return(ac);
}

ROPMAT *
resize_moparr(ROPMAT *mop, int n2alloc)
{
        int     nmats = 0;
        int     i;

        while (mop[nmats++].binop)
                ;
        for (i = nmats; i >= n2alloc; i--)
                rmx_free(mop[i].mtx);
        mop = (ROPMAT *)realloc(mop, n2alloc*sizeof(ROPMAT));
        if (mop == NULL) {
                fputs("Out of memory in resize_moparr()\n", stderr);
                exit(1);
        }
        if (n2alloc > nmats)
                memset(mop+nmats, 0, (n2alloc-nmats)*sizeof(ROPMAT));
        return(mop);
}

/* Load one or more matrices and operate on them, sending results to stdout */
int
main(int argc, char *argv[])
{
        int             outfmt = DTfromHeader;
        const char      *defCsym = NULL;
        int             nall = 2;
        ROPMAT          *mop = (ROPMAT *)calloc(nall, sizeof(ROPMAT));
        int             nmats = 0;
        RMATRIX         *mres = NULL;
        int             stdin_used = 0;
        int             i;
                                        /* get options and arguments */
        for (i = 1; i < argc; i++) {
                if (argv[i][0] && !argv[i][1] &&
                                strchr(".+*/", argv[i][0]) != NULL) {
                        if (!nmats || mop[nmats-1].binop) {
                                fprintf(stderr,
                        "%s: missing matrix argument before '%c' operation\n",
                                                argv[0], argv[i][0]);
                                return(1);
                        }
                        mop[nmats-1].binop = argv[i][0];
                } else if (argv[i][0] != '-' || !argv[i][1]) {
                        if (argv[i][0] == '-') {
                                if (stdin_used++) {
                                        fprintf(stderr,
                        "%s: standard input used for more than one matrix\n",
                                                argv[0]);
                                        return(1);
                                }
                                mop[nmats].inspec = stdin_name;
                        } else
                                mop[nmats].inspec = argv[i];
                        if (!mop[nmats].preop.csym)
                                mop[nmats].preop.csym = defCsym;
                        if (nmats > 0 && !mop[nmats-1].binop)
                                mop[nmats-1].binop = '.';
                        nmats++;
                } else {
                        int     n = argc-1 - i;
                        switch (argv[i][1]) {   /* get option */
                        case 'v':
                                verbose++;
                                break;
                        case 'f':
                                switch (argv[i][2]) {
                                case 'd':
                                        outfmt = DTdouble;
                                        break;
                                case 'f':
                                        outfmt = DTfloat;
                                        break;
                                case 'a':
                                        outfmt = DTascii;
                                        break;
                                case 'c':
                                        outfmt = DTrgbe;
                                        break;
                                default:
                                        goto userr;
                                }
                                break;
                        case 't':
                                mop[nmats].preop.transpose = 1;
                                break;
                        case 's':
                                if (n > MAXCOMP) n = MAXCOMP;
                                i += mop[nmats].preop.nsf =
                                        get_factors(mop[nmats].preop.sca,
                                                        n, argv+i+1);
                                if (mop[nmats].preop.nsf <= 0) {
                                        fprintf(stderr, "%s: -s missing arguments\n",
                                                        argv[0]);
                                        goto userr;
                                }
                                break;
                        case 'C':
                                if (!n || isflt(argv[i+1]))
                                        goto userr;
                                defCsym = mop[nmats].preop.csym = argv[++i];
                                mop[nmats].preop.clen = 0;
                                break;
                        case 'c':
                                if (n && !isflt(argv[i+1])) {
                                        mop[nmats].preop.csym = argv[++i];
                                        mop[nmats].preop.clen = 0;
                                        break;
                                }
                                if (n > MAXCOMP*MAXCOMP) n = MAXCOMP*MAXCOMP;
                                i += mop[nmats].preop.clen =
                                        get_factors(mop[nmats].preop.cmat,
                                                        n, argv+i+1);
                                if (mop[nmats].preop.clen <= 0) {
                                        fprintf(stderr, "%s: -c missing arguments\n",
                                                        argv[0]);
                                        goto userr;
                                }
                                mop[nmats].preop.csym = NULL;
                                break;
                        case 'r':
                                if (argv[i][2] == 'f')
                                        mop[nmats].rmp = RMPreflF;
                                else if (argv[i][2] == 'b')
                                        mop[nmats].rmp = RMPreflB;
                                else
                                        goto userr;
                                break;
                        default:
                                fprintf(stderr, "%s: unknown operation '%s'\n",
                                                argv[0], argv[i]);
                                goto userr;
                        }
                }
                if (nmats >= nall)
                        mop = resize_moparr(mop, nall += 2);
        }
        if (mop[0].inspec == NULL)      /* nothing to do? */
                goto userr;
        if (mop[nmats-1].binop) {
                fprintf(stderr,
                        "%s: missing matrix argument after '%c' operation\n",
                                argv[0], mop[nmats-1].binop);
                return(1);
        }
                                        /* favor quicker concatenation */
        mop[nmats].mtx = prefer_right2left(mop) ? op_right2left(mop)
                                                : op_left2right(mop);
        if (mop[nmats].mtx == NULL)
                return(1);
                                        /* apply trailing unary operations */
        mop[nmats].inspec = "trailing_ops";
        mres = loadop(mop+nmats);
        if (mres == NULL)
                return(1);
        if ((outfmt == DTfromHeader) & (mres->dtype < DTspec))
                outfmt = mres->dtype;
        if (outfmt == DTrgbe) {         /* check data type */
                if (mres->ncomp > 3)
                        outfmt = DTspec;
                else if (mres->dtype == DTxyze)
                        outfmt = DTxyze;
        }
#if DTrmx_native==DTfloat
        if (outfmt == DTdouble)
                fprintf(stderr,
                        "%s: warning - writing float result as double\n",
                                argv[0]);
#endif
        newheader("RADIANCE", stdout);  /* write result to stdout */
        printargs(argc, argv, stdout);
        return(rmx_write(mres, outfmt, stdout) ? 0 : 1);
userr:
        fprintf(stderr,
        "Usage: %s [-v][-f{adfc}][-t][-s sf .. | -c ce ..][-rf|-rb] m1 [.+*/] .. > mres\n",
                        argv[0]);
        return(1);
}
Revision:	2.41
Committed:	Fri Apr 18 23:59:03 2025 UTC (13 days, 14 hours ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.40:	+22 -5 lines
Log Message:	refactor(rmtxop,rcomb,pvsum): Removed BSDF library dependency where unneeded
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.41	static const char RCSid[] = "$Id: rmtxop.c,v 2.40 2025/04/04 22:47:56 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* General component matrix operations.
6			*/
7
8	greg	2.11	#include <errno.h>
9	greg	2.1	#include "rtio.h"
10			#include "rmatrix.h"
11	greg	2.10	#include "platform.h"
12	greg	2.1
13	greg	2.41	/* Preferred BSDF component:
14			none, transmission, reflection front (normal side), reflection back */
15			typedef enum {RMPnone=-1, RMPtrans=0, RMPreflF, RMPreflB} RMPref;
16
17	greg	2.22	/* Unary matrix operation(s) */
18	greg	2.1	typedef struct {
19	greg	2.27	double cmat[MAXCOMPMAXCOMP]; / component transformation */
20	greg	2.1	double sca[MAXCOMP]; /* scalar coefficients */
21	greg	2.27	const char csym; / symbolic coefs or file */
22			short clen; /* number of coefficients */
23	greg	2.13	short nsf; /* number of scalars */
24	greg	2.27	short transpose; /* do transpose? */
25	greg	2.13	} RUNARYOP;
26
27	greg	2.22	/* Matrix input source and requested operation(s) */
28	greg	2.13	typedef struct {
29			const char inspec; / input specification */
30	greg	2.18	RMPref rmp; /* matrix preference */
31	greg	2.13	RUNARYOP preop; /* unary operation(s) */
32			RMATRIX mtx; / original matrix if loaded */
33			int binop; /* binary op with next (or 0) */
34			} ROPMAT;
35	greg	2.1
36			int verbose = 0; /* verbose reporting? */
37
38	greg	2.13	/* Load matrix */
39	greg	2.35	int
40	greg	2.13	loadmatrix(ROPMAT *rop)
41	greg	2.1	{
42	greg	2.41	if (rop->mtx) /* already loaded? */
43	greg	2.13	return(0);
44	greg	2.41	/* check for BSDF input */
45			if ((rop->inspec[0] != '!') & (rop->rmp != RMPnone)) {
46			const char *sp = strrchr(rop->inspec, '.');
47			if (sp > rop->inspec && !strcasecmp(sp+1, "XML")) {
48			CMATRIX *cm = rop->rmp==RMPtrans ? cm_loadBTDF(rop->inspec) :
49			cm_loadBRDF(rop->inspec, rop->rmp==RMPreflB) ;
50			if (!cm)
51			return(-1);
52			rop->mtx = rmx_from_cmatrix(cm);
53			cm_free(cm);
54			rop->mtx->dtype = DTascii;
55			return(1); /* loaded BSDF XML file */
56			}
57			} /* else load regular matrix */
58			rop->mtx = rmx_load(rop->inspec);
59	greg	2.13
60	greg	2.41	return(rop->mtx ? 1 : -1);
61	greg	2.1	}
62
63	greg	2.35	extern int checksymbolic(ROPMAT *rop);
64	greg	2.27
65			/* Check/set transform based on a reference input file */
66	greg	2.35	int
67	greg	2.27	checkreffile(ROPMAT *rop)
68			{
69			static const char *curRF = NULL;
70			static RMATRIX refm;
71			const int nc = rop->mtx->ncomp;
72			int i;
73
74			if (!curRF \|\| strcmp(rop->preop.csym, curRF)) {
75			FILE *fp = fopen(rop->preop.csym, "rb");
76			if (!rmx_load_header(&refm, fp)) {
77			fprintf(stderr, "%s: cannot read info header\n",
78			rop->preop.csym);
79			curRF = NULL;
80			if (fp) fclose(fp);
81			return(-1);
82			}
83			fclose(fp);
84			curRF = rop->preop.csym;
85			}
86	greg	2.30	if (refm.ncomp == 3) {
87	greg	2.27	rop->preop.csym = (refm.dtype == DTxyze) ? "XYZ" : "RGB";
88			return(checksymbolic(rop));
89			}
90			if (refm.ncomp == 2) {
91			fprintf(stderr, "%s: cannot convert to 2 components\n",
92			curRF);
93			return(-1);
94			}
95			if (refm.ncomp == 1) {
96			rop->preop.csym = "Y"; /* XXX big assumption */
97			return(checksymbolic(rop));
98			}
99			if (refm.ncomp == nc &&
100			!memcmp(refm.wlpart, rop->mtx->wlpart, sizeof(refm.wlpart)))
101			return(0); /* nothing to do */
102
103			if ((nc <= 3) \| (nc > MAXCSAMP) \| (refm.ncomp > MAXCSAMP)) {
104			fprintf(stderr, "%s: cannot resample from %d to %d components\n",
105			curRF, nc, refm.ncomp);
106			return(-1);
107			}
108			rop->preop.clen = refm.ncomp * nc; /* compute spec to ref */
109
110			for (i = 0; i < nc; i++) {
111			SCOLOR scstim, scresp;
112			int j;
113			memset(scstim, 0, sizeof(COLORV)*nc);
114			scstim[i] = 1.f;
115			convertscolor(scresp, refm.ncomp, refm.wlpart[0], refm.wlpart[3],
116			scstim, nc, rop->mtx->wlpart[0], rop->mtx->wlpart[3]);
117			for (j = refm.ncomp; j-- > 0; )
118			rop->preop.cmat[j*nc + i] = scresp[j];
119			}
120	greg	2.29	memcpy(rop->mtx->wlpart, refm.wlpart, sizeof(rop->mtx->wlpart));
121	greg	2.27	return(0);
122			}
123
124	greg	2.22	/* Compute conversion row from spectrum to one channel of RGB */
125	greg	2.35	void
126	greg	2.22	rgbrow(ROPMAT *rop, int r, int p)
127			{
128			const int nc = rop->mtx->ncomp;
129			const float * wlp = rop->mtx->wlpart;
130			int i;
131
132			for (i = nc; i--; ) {
133			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
134			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
135			COLOR crgb;
136			spec_rgb(crgb, nmStart, nmEnd);
137			rop->preop.cmat[r*nc+i] = crgb[p];
138			}
139			}
140
141			/* Compute conversion row from spectrum to one channel of XYZ */
142	greg	2.35	void
143	greg	2.22	xyzrow(ROPMAT *rop, int r, int p)
144			{
145			const int nc = rop->mtx->ncomp;
146			const float * wlp = rop->mtx->wlpart;
147			int i;
148
149			for (i = nc; i--; ) {
150			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
151			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
152			COLOR cxyz;
153			spec_cie(cxyz, nmStart, nmEnd);
154			rop->preop.cmat[r*nc+i] = cxyz[p];
155			}
156			}
157
158			/* Use the spectral sensitivity function to compute matrix coefficients */
159	greg	2.35	void
160	greg	2.34	sensrow(ROPMAT rop, int r, double (sf)(const SCOLOR sc, int ncs, const float wlpt[4]))
161	greg	2.22	{
162			const int nc = rop->mtx->ncomp;
163			int i;
164
165			for (i = nc; i--; ) {
166			SCOLOR sclr;
167	greg	2.27	memset(sclr, 0, sizeof(COLORV)*nc);
168	greg	2.24	sclr[i] = 1.f;
169	greg	2.22	rop->preop.cmat[rnc+i] = (sf)(sclr, nc, rop->mtx->wlpart);
170			}
171			}
172
173			/* Check/set symbolic transform */
174	greg	2.35	int
175	greg	2.22	checksymbolic(ROPMAT *rop)
176			{
177			const int nc = rop->mtx->ncomp;
178			const int dt = rop->mtx->dtype;
179	greg	2.31	double cf = 1;
180	greg	2.22	int i, j;
181	greg	2.27	/* check suffix => reference file */
182			if (strchr(rop->preop.csym, '.') > rop->preop.csym)
183			return(checkreffile(rop));
184	greg	2.22
185			if (nc < 3) {
186			fprintf(stderr, "%s: -c '%s' requires at least 3 components\n",
187			rop->inspec, rop->preop.csym);
188			return(-1);
189			}
190			rop->preop.clen = strlen(rop->preop.csym) * nc;
191			if (rop->preop.clen > MAXCOMP*MAXCOMP) {
192			fprintf(stderr, "%s: -c '%s' results in too many components\n",
193			rop->inspec, rop->preop.csym);
194			return(-1);
195			}
196			for (j = 0; rop->preop.csym[j]; j++) {
197			int comp = 0;
198			switch (rop->preop.csym[j]) {
199			case 'B':
200	greg	2.31	case 'b':
201	greg	2.22	++comp;
202			/* fall through */
203			case 'G':
204	greg	2.31	case 'g':
205	greg	2.22	++comp;
206			/* fall through */
207			case 'R':
208	greg	2.31	case 'r':
209			if (rop->preop.csym[j] <= 'Z')
210			cf = 1./WHTEFFICACY;
211	greg	2.22	if (dt == DTxyze) {
212			for (i = 3; i--; )
213	greg	2.31	rop->preop.cmat[jnc+i] = cfxyz2rgbmat[comp][i];
214	greg	2.22	} else if (nc == 3)
215			rop->preop.cmat[j*nc+comp] = 1.;
216			else
217			rgbrow(rop, j, comp);
218			break;
219			case 'Z':
220	greg	2.31	case 'z':
221	greg	2.22	++comp;
222			/* fall through */
223			case 'Y':
224	greg	2.31	case 'y':
225	greg	2.22	++comp;
226			/* fall through */
227			case 'X':
228	greg	2.31	case 'x':
229			if ((rop->preop.csym[j] <= 'Z') & (dt != DTxyze))
230			cf = WHTEFFICACY;
231	greg	2.22	if (dt == DTxyze) {
232			rop->preop.cmat[j*nc+comp] = 1.;
233			} else if (nc == 3) {
234			for (i = 3; i--; )
235			rop->preop.cmat[j*nc+i] =
236			rgb2xyzmat[comp][i];
237			} else if (comp == CIEY)
238			sensrow(rop, j, scolor2photopic);
239			else
240			xyzrow(rop, j, comp);
241
242	greg	2.31	for (i = nc*(cf != 1); i--; )
243			rop->preop.cmat[jnc+i] = cf;
244	greg	2.22	break;
245	greg	2.24	case 'S': /* scotopic (il)luminance */
246	greg	2.31	cf = WHTSCOTOPIC;
247			/* fall through */
248			case 's':
249	greg	2.22	sensrow(rop, j, scolor2scotopic);
250	greg	2.31	for (i = nc*(cf != 1); i--; )
251			rop->preop.cmat[jnc+i] = cf;
252	greg	2.22	break;
253	greg	2.24	case 'M': /* melanopic (il)luminance */
254	greg	2.31	cf = WHTMELANOPIC;
255			/* fall through */
256			case 'm':
257	greg	2.22	sensrow(rop, j, scolor2melanopic);
258	greg	2.31	for (i = nc*(cf != 1); i--; )
259			rop->preop.cmat[jnc+i] = cf;
260	greg	2.22	break;
261	greg	2.24	case 'A': /* average component */
262	greg	2.31	case 'a':
263	greg	2.24	for (i = nc; i--; )
264	greg	2.25	rop->preop.cmat[j*nc+i] = 1./(double)nc;
265	greg	2.24	break;
266	greg	2.22	default:
267			fprintf(stderr, "%s: -c '%c' unsupported\n",
268			rop->inspec, rop->preop.csym[j]);
269			return(-1);
270			}
271			}
272			/* return recommended output type */
273	greg	2.32	if (!strcasecmp(rop->preop.csym, "XYZ")) {
274	greg	2.22	if (dt <= DTspec)
275			return(DTxyze);
276	greg	2.32	} else if (!strcasecmp(rop->preop.csym, "RGB")) {
277	greg	2.22	if (dt <= DTspec)
278			return(DTrgbe);
279	greg	2.30	} else if (dt == DTspec)
280	greg	2.22	return(DTfloat); /* probably not actual spectrum */
281			return(0);
282			}
283
284	greg	2.13	/* Get matrix and perform unary operations */
285	greg	2.35	RMATRIX *
286	greg	2.13	loadop(ROPMAT *rop)
287	greg	2.1	{
288	greg	2.22	int outtype = 0;
289	greg	2.13	RMATRIX *mres;
290	greg	2.22	int i, j;
291	greg	2.1
292	greg	2.13	if (loadmatrix(rop) < 0) /* make sure we're loaded */
293	greg	2.1	return(NULL);
294	greg	2.13
295	greg	2.27	if (rop->preop.csym && /* symbolic transform? */
296	greg	2.22	(outtype = checksymbolic(rop)) < 0)
297			goto failure;
298			if (rop->preop.clen > 0) { /* apply component transform? */
299			if (rop->preop.clen % rop->mtx->ncomp) {
300			fprintf(stderr, "%s: -c must have N x %d coefficients\n",
301			rop->inspec, rop->mtx->ncomp);
302			goto failure;
303			}
304			if (rop->preop.nsf > 0) { /* scale transform, first */
305			if (rop->preop.nsf == 1) {
306			for (i = rop->preop.clen; i--; )
307			rop->preop.cmat[i] *= rop->preop.sca[0];
308	greg	2.28	} else if (rop->preop.nsf*rop->mtx->ncomp != rop->preop.clen) {
309	greg	2.22	fprintf(stderr, "%s: -s must have one or %d factors\n",
310	greg	2.28	rop->inspec,
311			rop->preop.clen/rop->mtx->ncomp);
312	greg	2.22	goto failure;
313			} else {
314	greg	2.28	for (i = rop->preop.nsf; i--; )
315			for (j = rop->mtx->ncomp; j--; )
316			rop->preop.cmat[i*rop->mtx->ncomp+j]
317			*= rop->preop.sca[i];
318	greg	2.22	}
319			}
320			mres = rmx_transform(rop->mtx, rop->preop.clen/rop->mtx->ncomp,
321			rop->preop.cmat);
322			if (mres == NULL) {
323			fprintf(stderr, "%s: matrix transform failed\n",
324			rop->inspec);
325	greg	2.13	goto failure;
326	greg	2.1	}
327	greg	2.22	if (verbose)
328			fprintf(stderr, "%s: applied %d x %d transform%s\n",
329			rop->inspec, mres->ncomp,
330			rop->mtx->ncomp,
331			rop->preop.nsf ? " (* scalar)" : "");
332	greg	2.26	rop->preop.nsf = 0; /* now folded in */
333	greg	2.22	if ((mres->ncomp > 3) & (mres->dtype <= DTspec))
334			outtype = DTfloat; /* probably not actual spectrum */
335			rmx_free(rop->mtx);
336			rop->mtx = mres;
337			}
338			if (rop->preop.nsf > 0) { /* apply scalar(s)? */
339	greg	2.13	if (rop->preop.nsf == 1) {
340			for (i = rop->mtx->ncomp; --i; )
341			rop->preop.sca[i] = rop->preop.sca[0];
342			} else if (rop->preop.nsf != rop->mtx->ncomp) {
343	greg	2.1	fprintf(stderr, "%s: -s must have one or %d factors\n",
344	greg	2.13	rop->inspec, rop->mtx->ncomp);
345			goto failure;
346	greg	2.1	}
347	greg	2.13	if (!rmx_scale(rop->mtx, rop->preop.sca)) {
348			fputs(rop->inspec, stderr);
349	greg	2.1	fputs(": scalar operation failed\n", stderr);
350	greg	2.13	goto failure;
351	greg	2.1	}
352			if (verbose) {
353	greg	2.13	fputs(rop->inspec, stderr);
354	greg	2.1	fputs(": applied scalar (", stderr);
355	greg	2.13	for (i = 0; i < rop->preop.nsf; i++)
356			fprintf(stderr, " %f", rop->preop.sca[i]);
357	greg	2.1	fputs(" )\n", stderr);
358			}
359			}
360	greg	2.22	if (rop->preop.transpose) { /* transpose matrix? */
361	greg	2.37	if (!rmx_transpose(rop->mtx)) {
362	greg	2.13	fputs(rop->inspec, stderr);
363	greg	2.12	fputs(": transpose failed\n", stderr);
364	greg	2.13	goto failure;
365	greg	2.12	}
366			if (verbose) {
367	greg	2.13	fputs(rop->inspec, stderr);
368	greg	2.12	fputs(": transposed rows and columns\n", stderr);
369			}
370	greg	2.13	}
371			mres = rop->mtx;
372			rop->mtx = NULL;
373	greg	2.22	if (outtype)
374			mres->dtype = outtype;
375	greg	2.13	return(mres);
376			failure:
377			rmx_free(rop->mtx);
378			return(rop->mtx = NULL);
379			}
380
381			/* Execute binary operation, free matrix arguments and return new result */
382	greg	2.35	RMATRIX *
383	greg	2.13	binaryop(const char inspec, RMATRIX mleft, int op, RMATRIX *mright)
384			{
385			RMATRIX *mres = NULL;
386			int i;
387
388			if ((mleft == NULL) \| (mright == NULL))
389			return(NULL);
390			switch (op) {
391			case '.': /* concatenate */
392	greg	2.16	if (mleft->ncomp != mright->ncomp) {
393			fputs(inspec, stderr);
394			fputs(": # components do not match\n", stderr);
395			} else if (mleft->ncols != mright->nrows) {
396			fputs(inspec, stderr);
397			fputs(": mismatched dimensions\n",
398			stderr);
399			} else
400			mres = rmx_multiply(mleft, mright);
401	greg	2.13	rmx_free(mleft);
402	greg	2.12	rmx_free(mright);
403	greg	2.1	if (mres == NULL) {
404	greg	2.13	fputs(inspec, stderr);
405	greg	2.16	fputs(": concatenation failed\n", stderr);
406	greg	2.1	return(NULL);
407			}
408			if (verbose) {
409	greg	2.13	fputs(inspec, stderr);
410	greg	2.1	fputs(": concatenated matrix\n", stderr);
411			}
412	greg	2.13	break;
413			case '+':
414			if (!rmx_sum(mleft, mright, NULL)) {
415			fputs(inspec, stderr);
416	greg	2.1	fputs(": matrix sum failed\n", stderr);
417	greg	2.13	rmx_free(mleft);
418	greg	2.1	rmx_free(mright);
419			return(NULL);
420			}
421			if (verbose) {
422	greg	2.13	fputs(inspec, stderr);
423	greg	2.1	fputs(": added in matrix\n", stderr);
424			}
425			rmx_free(mright);
426	greg	2.13	mres = mleft;
427			break;
428			case '*':
429			case '/': {
430			const char * tnam = (op == '/') ?
431	greg	2.11	"division" : "multiplication";
432			errno = 0;
433	greg	2.13	if (!rmx_elemult(mleft, mright, (op == '/'))) {
434	greg	2.11	fprintf(stderr, "%s: element-wise %s failed\n",
435	greg	2.13	inspec, tnam);
436			rmx_free(mleft);
437	greg	2.11	rmx_free(mright);
438			return(NULL);
439			}
440			if (errno)
441			fprintf(stderr,
442			"%s: warning - error during element-wise %s\n",
443	greg	2.13	inspec, tnam);
444	greg	2.11	else if (verbose)
445	greg	2.13	fprintf(stderr, "%s: element-wise %s\n", inspec, tnam);
446	greg	2.11	rmx_free(mright);
447	greg	2.13	mres = mleft;
448			} break;
449			default:
450			fprintf(stderr, "%s: unknown operation '%c'\n", inspec, op);
451			rmx_free(mleft);
452	greg	2.1	rmx_free(mright);
453			return(NULL);
454			}
455	greg	2.13	return(mres);
456			}
457
458			/* Perform matrix operations from left to right */
459	greg	2.35	RMATRIX *
460	greg	2.13	op_left2right(ROPMAT *mop)
461			{
462			RMATRIX *mleft = loadop(mop);
463
464			while (mop->binop) {
465			if (mleft == NULL)
466			break;
467			mleft = binaryop(mop[1].inspec,
468			mleft, mop->binop, loadop(mop+1));
469			mop++;
470			}
471	greg	2.1	return(mleft);
472			}
473
474	greg	2.13	/* Perform matrix operations from right to left */
475	greg	2.35	RMATRIX *
476	greg	2.13	op_right2left(ROPMAT *mop)
477			{
478			RMATRIX *mright;
479			int rpos = 0;
480			/* find end of list */
481			while (mop[rpos].binop)
482	greg	2.14	if (mop[rpos++].binop != '.') {
483			fputs(
484			"Right-to-left evaluation only for matrix multiplication!\n",
485			stderr);
486			return(NULL);
487			}
488	greg	2.13	mright = loadop(mop+rpos);
489			while (rpos-- > 0) {
490			if (mright == NULL)
491			break;
492	greg	2.20	mright = binaryop(mop[rpos+1].inspec,
493	greg	2.13	loadop(mop+rpos), mop[rpos].binop, mright);
494			}
495			return(mright);
496			}
497
498			#define t_nrows(mop) ((mop)->preop.transpose ? (mop)->mtx->ncols \
499			: (mop)->mtx->nrows)
500			#define t_ncols(mop) ((mop)->preop.transpose ? (mop)->mtx->nrows \
501			: (mop)->mtx->ncols)
502
503			/* Should we prefer concatenating from rightmost matrix towards left? */
504	greg	2.35	int
505	greg	2.13	prefer_right2left(ROPMAT *mop)
506			{
507			int mri = 0;
508
509			while (mop[mri].binop) /* find rightmost matrix */
510			if (mop[mri++].binop != '.')
511			return(0); /* pre-empt reversal for other ops */
512
513			if (mri <= 1)
514			return(0); /* won't matter */
515
516			if (loadmatrix(mop+mri) < 0) /* load rightmost cat */
517			return(1); /* fail will bail in a moment */
518
519			if (t_ncols(mop+mri) == 1)
520			return(1); /* definitely better R->L */
521
522			if (t_ncols(mop+mri) >= t_nrows(mop+mri))
523			return(0); /* ...probably worse */
524
525			if (loadmatrix(mop) < 0) /* load leftmost */
526			return(0); /* fail will bail in a moment */
527
528			return(t_ncols(mop+mri) < t_nrows(mop));
529			}
530
531	greg	2.35	int
532	greg	2.1	get_factors(double da[], int n, char *av[])
533			{
534			int ac;
535
536			for (ac = 0; ac < n && isflt(av[ac]); ac++)
537			da[ac] = atof(av[ac]);
538			return(ac);
539			}
540
541	greg	2.35	ROPMAT *
542	greg	2.26	resize_moparr(ROPMAT *mop, int n2alloc)
543	greg	2.13	{
544			int nmats = 0;
545	greg	2.26	int i;
546	greg	2.13
547			while (mop[nmats++].binop)
548			;
549	greg	2.35	for (i = nmats; i >= n2alloc; i--)
550	greg	2.26	rmx_free(mop[i].mtx);
551	greg	2.13	mop = (ROPMAT )realloc(mop, n2allocsizeof(ROPMAT));
552			if (mop == NULL) {
553	greg	2.26	fputs("Out of memory in resize_moparr()\n", stderr);
554	greg	2.13	exit(1);
555			}
556			if (n2alloc > nmats)
557			memset(mop+nmats, 0, (n2alloc-nmats)*sizeof(ROPMAT));
558			return(mop);
559			}
560
561	greg	2.1	/* Load one or more matrices and operate on them, sending results to stdout */
562			int
563			main(int argc, char *argv[])
564			{
565	greg	2.27	int outfmt = DTfromHeader;
566			const char *defCsym = NULL;
567			int nall = 2;
568			ROPMAT mop = (ROPMAT )calloc(nall, sizeof(ROPMAT));
569			int nmats = 0;
570			RMATRIX *mres = NULL;
571			int stdin_used = 0;
572			int i;
573	greg	2.1	/* get options and arguments */
574	greg	2.13	for (i = 1; i < argc; i++) {
575	greg	2.11	if (argv[i][0] && !argv[i][1] &&
576	greg	2.13	strchr(".+*/", argv[i][0]) != NULL) {
577	greg	2.15	if (!nmats \|\| mop[nmats-1].binop) {
578	greg	2.14	fprintf(stderr,
579	greg	2.15	"%s: missing matrix argument before '%c' operation\n",
580	greg	2.14	argv[0], argv[i][0]);
581	greg	2.13	return(1);
582			}
583	greg	2.15	mop[nmats-1].binop = argv[i][0];
584	greg	2.1	} else if (argv[i][0] != '-' \|\| !argv[i][1]) {
585	greg	2.13	if (argv[i][0] == '-') {
586			if (stdin_used++) {
587			fprintf(stderr,
588			"%s: standard input used for more than one matrix\n",
589			argv[0]);
590			return(1);
591			}
592			mop[nmats].inspec = stdin_name;
593			} else
594			mop[nmats].inspec = argv[i];
595	greg	2.27	if (!mop[nmats].preop.csym)
596			mop[nmats].preop.csym = defCsym;
597	greg	2.13	if (nmats > 0 && !mop[nmats-1].binop)
598			mop[nmats-1].binop = '.';
599			nmats++;
600	greg	2.1	} else {
601			int n = argc-1 - i;
602			switch (argv[i][1]) { /* get option */
603			case 'v':
604	greg	2.14	verbose++;
605	greg	2.1	break;
606			case 'f':
607			switch (argv[i][2]) {
608			case 'd':
609			outfmt = DTdouble;
610			break;
611			case 'f':
612			outfmt = DTfloat;
613			break;
614			case 'a':
615			outfmt = DTascii;
616			break;
617			case 'c':
618			outfmt = DTrgbe;
619			break;
620			default:
621			goto userr;
622			}
623			break;
624			case 't':
625	greg	2.13	mop[nmats].preop.transpose = 1;
626	greg	2.1	break;
627			case 's':
628			if (n > MAXCOMP) n = MAXCOMP;
629	greg	2.13	i += mop[nmats].preop.nsf =
630			get_factors(mop[nmats].preop.sca,
631			n, argv+i+1);
632	greg	2.22	if (mop[nmats].preop.nsf <= 0) {
633			fprintf(stderr, "%s: -s missing arguments\n",
634			argv[0]);
635			goto userr;
636			}
637	greg	2.1	break;
638	greg	2.27	case 'C':
639			if (!n \|\| isflt(argv[i+1]))
640			goto userr;
641			defCsym = mop[nmats].preop.csym = argv[++i];
642			mop[nmats].preop.clen = 0;
643			break;
644	greg	2.1	case 'c':
645	greg	2.27	if (n && !isflt(argv[i+1])) {
646			mop[nmats].preop.csym = argv[++i];
647	greg	2.22	mop[nmats].preop.clen = 0;
648			break;
649			}
650	greg	2.1	if (n > MAXCOMPMAXCOMP) n = MAXCOMPMAXCOMP;
651	greg	2.13	i += mop[nmats].preop.clen =
652			get_factors(mop[nmats].preop.cmat,
653			n, argv+i+1);
654	greg	2.22	if (mop[nmats].preop.clen <= 0) {
655			fprintf(stderr, "%s: -c missing arguments\n",
656			argv[0]);
657			goto userr;
658			}
659	greg	2.27	mop[nmats].preop.csym = NULL;
660	greg	2.1	break;
661	greg	2.18	case 'r':
662			if (argv[i][2] == 'f')
663			mop[nmats].rmp = RMPreflF;
664			else if (argv[i][2] == 'b')
665			mop[nmats].rmp = RMPreflB;
666			else
667			goto userr;
668			break;
669	greg	2.1	default:
670			fprintf(stderr, "%s: unknown operation '%s'\n",
671			argv[0], argv[i]);
672			goto userr;
673			}
674			}
675	greg	2.14	if (nmats >= nall)
676	greg	2.26	mop = resize_moparr(mop, nall += 2);
677	greg	2.13	}
678			if (mop[0].inspec == NULL) /* nothing to do? */
679	greg	2.1	goto userr;
680	greg	2.15	if (mop[nmats-1].binop) {
681			fprintf(stderr,
682			"%s: missing matrix argument after '%c' operation\n",
683			argv[0], mop[nmats-1].binop);
684			return(1);
685			}
686	greg	2.13	/* favor quicker concatenation */
687	greg	2.14	mop[nmats].mtx = prefer_right2left(mop) ? op_right2left(mop)
688			: op_left2right(mop);
689			if (mop[nmats].mtx == NULL)
690			return(1);
691			/* apply trailing unary operations */
692			mop[nmats].inspec = "trailing_ops";
693			mres = loadop(mop+nmats);
694			if (mres == NULL)
695	greg	2.13	return(1);
696	greg	2.40	if ((outfmt == DTfromHeader) & (mres->dtype < DTspec))
697	greg	2.6	outfmt = mres->dtype;
698	greg	2.40	if (outfmt == DTrgbe) { /* check data type */
699	greg	2.22	if (mres->ncomp > 3)
700			outfmt = DTspec;
701			else if (mres->dtype == DTxyze)
702			outfmt = DTxyze;
703			}
704	greg	2.39	#if DTrmx_native==DTfloat
705			if (outfmt == DTdouble)
706			fprintf(stderr,
707			"%s: warning - writing float result as double\n",
708			argv[0]);
709			#endif
710	greg	2.26	newheader("RADIANCE", stdout); /* write result to stdout */
711	greg	2.1	printargs(argc, argv, stdout);
712	greg	2.23	return(rmx_write(mres, outfmt, stdout) ? 0 : 1);
713	greg	2.1	userr:
714			fprintf(stderr,
715	greg	2.26	"Usage: %s [-v][-f{adfc}][-t][-s sf .. \| -c ce ..][-rf\|-rb] m1 [.+*/] .. > mres\n",
716	greg	2.1	argv[0]);
717			return(1);
718			}