src/util/rmtxop.c

#ifndef lint
static const char RCSid[] = "$Id: rmtxop.c,v 2.32 2023/12/19 16:09:20 greg Exp $";
#endif
/*
 * General component matrix operations.
 */

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

#define MAXCOMP         MAXCSAMP        /* #components we support */

/* 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 */
static int
loadmatrix(ROPMAT *rop)
{
        if (rop->mtx != NULL)           /* already loaded? */
                return(0);

        rop->mtx = rmx_load(rop->inspec, rop->rmp);

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

static int      checksymbolic(ROPMAT *rop);

/* Check/set transform based on a reference input file */
static 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 */
static 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 */
static 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 */
static void
sensrow(ROPMAT *rop, int r, double (*sf)(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 */
static 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 */
static 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? */
                mres = rmx_transpose(rop->mtx);
                if (mres == NULL) {
                        fputs(rop->inspec, stderr);
                        fputs(": transpose failed\n", stderr);
                        goto failure;
                }
                if (verbose) {
                        fputs(rop->inspec, stderr);
                        fputs(": transposed rows and columns\n", stderr);
                }
                rmx_free(rop->mtx);
                rop->mtx = mres;
        }
        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 */
static 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 */
static 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 */
static 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? */
static 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));
}

static 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);
}

static 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)     /* check data type */
                outfmt = mres->dtype;
        if (outfmt == DTrgbe) {
                if (mres->ncomp > 3)
                        outfmt = DTspec;
                else if (mres->dtype == DTxyze)
                        outfmt = DTxyze;
        }
        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:	2.33
Committed:	Thu May 16 18:59:19 2024 UTC (6 days, 8 hours ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.32:	+1 -2 lines
Log Message:	fix: Made use of resolu.h more consistent and reliable
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.33	static const char RCSid[] = "$Id: rmtxop.c,v 2.32 2023/12/19 16:09:20 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	2.22	#define MAXCOMP MAXCSAMP /* #components we support */
14	greg	2.1
15	greg	2.22	/* Unary matrix operation(s) */
16	greg	2.1	typedef struct {
17	greg	2.27	double cmat[MAXCOMPMAXCOMP]; / component transformation */
18	greg	2.1	double sca[MAXCOMP]; /* scalar coefficients */
19	greg	2.27	const char csym; / symbolic coefs or file */
20			short clen; /* number of coefficients */
21	greg	2.13	short nsf; /* number of scalars */
22	greg	2.27	short transpose; /* do transpose? */
23	greg	2.13	} RUNARYOP;
24
25	greg	2.22	/* Matrix input source and requested operation(s) */
26	greg	2.13	typedef struct {
27			const char inspec; / input specification */
28	greg	2.18	RMPref rmp; /* matrix preference */
29	greg	2.13	RUNARYOP preop; /* unary operation(s) */
30			RMATRIX mtx; / original matrix if loaded */
31			int binop; /* binary op with next (or 0) */
32			} ROPMAT;
33	greg	2.1
34			int verbose = 0; /* verbose reporting? */
35
36	greg	2.13	/* Load matrix */
37			static int
38			loadmatrix(ROPMAT *rop)
39	greg	2.1	{
40	greg	2.20	if (rop->mtx != NULL) /* already loaded? */
41	greg	2.13	return(0);
42
43	greg	2.18	rop->mtx = rmx_load(rop->inspec, rop->rmp);
44	greg	2.23
45			return(!rop->mtx ? -1 : 1);
46	greg	2.1	}
47
48	greg	2.27	static int checksymbolic(ROPMAT *rop);
49
50			/* Check/set transform based on a reference input file */
51			static int
52			checkreffile(ROPMAT *rop)
53			{
54			static const char *curRF = NULL;
55			static RMATRIX refm;
56			const int nc = rop->mtx->ncomp;
57			int i;
58
59			if (!curRF \|\| strcmp(rop->preop.csym, curRF)) {
60			FILE *fp = fopen(rop->preop.csym, "rb");
61			if (!rmx_load_header(&refm, fp)) {
62			fprintf(stderr, "%s: cannot read info header\n",
63			rop->preop.csym);
64			curRF = NULL;
65			if (fp) fclose(fp);
66			return(-1);
67			}
68			fclose(fp);
69			curRF = rop->preop.csym;
70			}
71	greg	2.30	if (refm.ncomp == 3) {
72	greg	2.27	rop->preop.csym = (refm.dtype == DTxyze) ? "XYZ" : "RGB";
73			return(checksymbolic(rop));
74			}
75			if (refm.ncomp == 2) {
76			fprintf(stderr, "%s: cannot convert to 2 components\n",
77			curRF);
78			return(-1);
79			}
80			if (refm.ncomp == 1) {
81			rop->preop.csym = "Y"; /* XXX big assumption */
82			return(checksymbolic(rop));
83			}
84			if (refm.ncomp == nc &&
85			!memcmp(refm.wlpart, rop->mtx->wlpart, sizeof(refm.wlpart)))
86			return(0); /* nothing to do */
87
88			if ((nc <= 3) \| (nc > MAXCSAMP) \| (refm.ncomp > MAXCSAMP)) {
89			fprintf(stderr, "%s: cannot resample from %d to %d components\n",
90			curRF, nc, refm.ncomp);
91			return(-1);
92			}
93			rop->preop.clen = refm.ncomp * nc; /* compute spec to ref */
94
95			for (i = 0; i < nc; i++) {
96			SCOLOR scstim, scresp;
97			int j;
98			memset(scstim, 0, sizeof(COLORV)*nc);
99			scstim[i] = 1.f;
100			convertscolor(scresp, refm.ncomp, refm.wlpart[0], refm.wlpart[3],
101			scstim, nc, rop->mtx->wlpart[0], rop->mtx->wlpart[3]);
102			for (j = refm.ncomp; j-- > 0; )
103			rop->preop.cmat[j*nc + i] = scresp[j];
104			}
105	greg	2.29	memcpy(rop->mtx->wlpart, refm.wlpart, sizeof(rop->mtx->wlpart));
106	greg	2.27	return(0);
107			}
108
109	greg	2.22	/* Compute conversion row from spectrum to one channel of RGB */
110			static void
111			rgbrow(ROPMAT *rop, int r, int p)
112			{
113			const int nc = rop->mtx->ncomp;
114			const float * wlp = rop->mtx->wlpart;
115			int i;
116
117			for (i = nc; i--; ) {
118			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
119			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
120			COLOR crgb;
121			spec_rgb(crgb, nmStart, nmEnd);
122			rop->preop.cmat[r*nc+i] = crgb[p];
123			}
124			}
125
126			/* Compute conversion row from spectrum to one channel of XYZ */
127			static void
128			xyzrow(ROPMAT *rop, int r, int p)
129			{
130			const int nc = rop->mtx->ncomp;
131			const float * wlp = rop->mtx->wlpart;
132			int i;
133
134			for (i = nc; i--; ) {
135			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
136			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
137			COLOR cxyz;
138			spec_cie(cxyz, nmStart, nmEnd);
139			rop->preop.cmat[r*nc+i] = cxyz[p];
140			}
141			}
142
143			/* Use the spectral sensitivity function to compute matrix coefficients */
144			static void
145			sensrow(ROPMAT rop, int r, double (sf)(SCOLOR sc, int ncs, const float wlpt[4]))
146			{
147			const int nc = rop->mtx->ncomp;
148			int i;
149
150			for (i = nc; i--; ) {
151			SCOLOR sclr;
152	greg	2.27	memset(sclr, 0, sizeof(COLORV)*nc);
153	greg	2.24	sclr[i] = 1.f;
154	greg	2.22	rop->preop.cmat[rnc+i] = (sf)(sclr, nc, rop->mtx->wlpart);
155			}
156			}
157
158			/* Check/set symbolic transform */
159			static int
160			checksymbolic(ROPMAT *rop)
161			{
162			const int nc = rop->mtx->ncomp;
163			const int dt = rop->mtx->dtype;
164	greg	2.31	double cf = 1;
165	greg	2.22	int i, j;
166	greg	2.27	/* check suffix => reference file */
167			if (strchr(rop->preop.csym, '.') > rop->preop.csym)
168			return(checkreffile(rop));
169	greg	2.22
170			if (nc < 3) {
171			fprintf(stderr, "%s: -c '%s' requires at least 3 components\n",
172			rop->inspec, rop->preop.csym);
173			return(-1);
174			}
175			rop->preop.clen = strlen(rop->preop.csym) * nc;
176			if (rop->preop.clen > MAXCOMP*MAXCOMP) {
177			fprintf(stderr, "%s: -c '%s' results in too many components\n",
178			rop->inspec, rop->preop.csym);
179			return(-1);
180			}
181			for (j = 0; rop->preop.csym[j]; j++) {
182			int comp = 0;
183			switch (rop->preop.csym[j]) {
184			case 'B':
185	greg	2.31	case 'b':
186	greg	2.22	++comp;
187			/* fall through */
188			case 'G':
189	greg	2.31	case 'g':
190	greg	2.22	++comp;
191			/* fall through */
192			case 'R':
193	greg	2.31	case 'r':
194			if (rop->preop.csym[j] <= 'Z')
195			cf = 1./WHTEFFICACY;
196	greg	2.22	if (dt == DTxyze) {
197			for (i = 3; i--; )
198	greg	2.31	rop->preop.cmat[jnc+i] = cfxyz2rgbmat[comp][i];
199	greg	2.22	} else if (nc == 3)
200			rop->preop.cmat[j*nc+comp] = 1.;
201			else
202			rgbrow(rop, j, comp);
203			break;
204			case 'Z':
205	greg	2.31	case 'z':
206	greg	2.22	++comp;
207			/* fall through */
208			case 'Y':
209	greg	2.31	case 'y':
210	greg	2.22	++comp;
211			/* fall through */
212			case 'X':
213	greg	2.31	case 'x':
214			if ((rop->preop.csym[j] <= 'Z') & (dt != DTxyze))
215			cf = WHTEFFICACY;
216	greg	2.22	if (dt == DTxyze) {
217			rop->preop.cmat[j*nc+comp] = 1.;
218			} else if (nc == 3) {
219			for (i = 3; i--; )
220			rop->preop.cmat[j*nc+i] =
221			rgb2xyzmat[comp][i];
222			} else if (comp == CIEY)
223			sensrow(rop, j, scolor2photopic);
224			else
225			xyzrow(rop, j, comp);
226
227	greg	2.31	for (i = nc*(cf != 1); i--; )
228			rop->preop.cmat[jnc+i] = cf;
229	greg	2.22	break;
230	greg	2.24	case 'S': /* scotopic (il)luminance */
231	greg	2.31	cf = WHTSCOTOPIC;
232			/* fall through */
233			case 's':
234	greg	2.22	sensrow(rop, j, scolor2scotopic);
235	greg	2.31	for (i = nc*(cf != 1); i--; )
236			rop->preop.cmat[jnc+i] = cf;
237	greg	2.22	break;
238	greg	2.24	case 'M': /* melanopic (il)luminance */
239	greg	2.31	cf = WHTMELANOPIC;
240			/* fall through */
241			case 'm':
242	greg	2.22	sensrow(rop, j, scolor2melanopic);
243	greg	2.31	for (i = nc*(cf != 1); i--; )
244			rop->preop.cmat[jnc+i] = cf;
245	greg	2.22	break;
246	greg	2.24	case 'A': /* average component */
247	greg	2.31	case 'a':
248	greg	2.24	for (i = nc; i--; )
249	greg	2.25	rop->preop.cmat[j*nc+i] = 1./(double)nc;
250	greg	2.24	break;
251	greg	2.22	default:
252			fprintf(stderr, "%s: -c '%c' unsupported\n",
253			rop->inspec, rop->preop.csym[j]);
254			return(-1);
255			}
256			}
257			/* return recommended output type */
258	greg	2.32	if (!strcasecmp(rop->preop.csym, "XYZ")) {
259	greg	2.22	if (dt <= DTspec)
260			return(DTxyze);
261	greg	2.32	} else if (!strcasecmp(rop->preop.csym, "RGB")) {
262	greg	2.22	if (dt <= DTspec)
263			return(DTrgbe);
264	greg	2.30	} else if (dt == DTspec)
265	greg	2.22	return(DTfloat); /* probably not actual spectrum */
266			return(0);
267			}
268
269	greg	2.13	/* Get matrix and perform unary operations */
270	greg	2.1	static RMATRIX *
271	greg	2.13	loadop(ROPMAT *rop)
272	greg	2.1	{
273	greg	2.22	int outtype = 0;
274	greg	2.13	RMATRIX *mres;
275	greg	2.22	int i, j;
276	greg	2.1
277	greg	2.13	if (loadmatrix(rop) < 0) /* make sure we're loaded */
278	greg	2.1	return(NULL);
279	greg	2.13
280	greg	2.27	if (rop->preop.csym && /* symbolic transform? */
281	greg	2.22	(outtype = checksymbolic(rop)) < 0)
282			goto failure;
283			if (rop->preop.clen > 0) { /* apply component transform? */
284			if (rop->preop.clen % rop->mtx->ncomp) {
285			fprintf(stderr, "%s: -c must have N x %d coefficients\n",
286			rop->inspec, rop->mtx->ncomp);
287			goto failure;
288			}
289			if (rop->preop.nsf > 0) { /* scale transform, first */
290			if (rop->preop.nsf == 1) {
291			for (i = rop->preop.clen; i--; )
292			rop->preop.cmat[i] *= rop->preop.sca[0];
293	greg	2.28	} else if (rop->preop.nsf*rop->mtx->ncomp != rop->preop.clen) {
294	greg	2.22	fprintf(stderr, "%s: -s must have one or %d factors\n",
295	greg	2.28	rop->inspec,
296			rop->preop.clen/rop->mtx->ncomp);
297	greg	2.22	goto failure;
298			} else {
299	greg	2.28	for (i = rop->preop.nsf; i--; )
300			for (j = rop->mtx->ncomp; j--; )
301			rop->preop.cmat[i*rop->mtx->ncomp+j]
302			*= rop->preop.sca[i];
303	greg	2.22	}
304			}
305			mres = rmx_transform(rop->mtx, rop->preop.clen/rop->mtx->ncomp,
306			rop->preop.cmat);
307			if (mres == NULL) {
308			fprintf(stderr, "%s: matrix transform failed\n",
309			rop->inspec);
310	greg	2.13	goto failure;
311	greg	2.1	}
312	greg	2.22	if (verbose)
313			fprintf(stderr, "%s: applied %d x %d transform%s\n",
314			rop->inspec, mres->ncomp,
315			rop->mtx->ncomp,
316			rop->preop.nsf ? " (* scalar)" : "");
317	greg	2.26	rop->preop.nsf = 0; /* now folded in */
318	greg	2.22	if ((mres->ncomp > 3) & (mres->dtype <= DTspec))
319			outtype = DTfloat; /* probably not actual spectrum */
320			rmx_free(rop->mtx);
321			rop->mtx = mres;
322			}
323			if (rop->preop.nsf > 0) { /* apply scalar(s)? */
324	greg	2.13	if (rop->preop.nsf == 1) {
325			for (i = rop->mtx->ncomp; --i; )
326			rop->preop.sca[i] = rop->preop.sca[0];
327			} else if (rop->preop.nsf != rop->mtx->ncomp) {
328	greg	2.1	fprintf(stderr, "%s: -s must have one or %d factors\n",
329	greg	2.13	rop->inspec, rop->mtx->ncomp);
330			goto failure;
331	greg	2.1	}
332	greg	2.13	if (!rmx_scale(rop->mtx, rop->preop.sca)) {
333			fputs(rop->inspec, stderr);
334	greg	2.1	fputs(": scalar operation failed\n", stderr);
335	greg	2.13	goto failure;
336	greg	2.1	}
337			if (verbose) {
338	greg	2.13	fputs(rop->inspec, stderr);
339	greg	2.1	fputs(": applied scalar (", stderr);
340	greg	2.13	for (i = 0; i < rop->preop.nsf; i++)
341			fprintf(stderr, " %f", rop->preop.sca[i]);
342	greg	2.1	fputs(" )\n", stderr);
343			}
344			}
345	greg	2.22	if (rop->preop.transpose) { /* transpose matrix? */
346	greg	2.13	mres = rmx_transpose(rop->mtx);
347			if (mres == NULL) {
348			fputs(rop->inspec, stderr);
349	greg	2.12	fputs(": transpose failed\n", stderr);
350	greg	2.13	goto failure;
351	greg	2.12	}
352			if (verbose) {
353	greg	2.13	fputs(rop->inspec, stderr);
354	greg	2.12	fputs(": transposed rows and columns\n", stderr);
355			}
356	greg	2.13	rmx_free(rop->mtx);
357			rop->mtx = mres;
358			}
359			mres = rop->mtx;
360			rop->mtx = NULL;
361	greg	2.22	if (outtype)
362			mres->dtype = outtype;
363	greg	2.13	return(mres);
364			failure:
365			rmx_free(rop->mtx);
366			return(rop->mtx = NULL);
367			}
368
369			/* Execute binary operation, free matrix arguments and return new result */
370			static RMATRIX *
371			binaryop(const char inspec, RMATRIX mleft, int op, RMATRIX *mright)
372			{
373			RMATRIX *mres = NULL;
374			int i;
375
376			if ((mleft == NULL) \| (mright == NULL))
377			return(NULL);
378			switch (op) {
379			case '.': /* concatenate */
380	greg	2.16	if (mleft->ncomp != mright->ncomp) {
381			fputs(inspec, stderr);
382			fputs(": # components do not match\n", stderr);
383			} else if (mleft->ncols != mright->nrows) {
384			fputs(inspec, stderr);
385			fputs(": mismatched dimensions\n",
386			stderr);
387			} else
388			mres = rmx_multiply(mleft, mright);
389	greg	2.13	rmx_free(mleft);
390	greg	2.12	rmx_free(mright);
391	greg	2.1	if (mres == NULL) {
392	greg	2.13	fputs(inspec, stderr);
393	greg	2.16	fputs(": concatenation failed\n", stderr);
394	greg	2.1	return(NULL);
395			}
396			if (verbose) {
397	greg	2.13	fputs(inspec, stderr);
398	greg	2.1	fputs(": concatenated matrix\n", stderr);
399			}
400	greg	2.13	break;
401			case '+':
402			if (!rmx_sum(mleft, mright, NULL)) {
403			fputs(inspec, stderr);
404	greg	2.1	fputs(": matrix sum failed\n", stderr);
405	greg	2.13	rmx_free(mleft);
406	greg	2.1	rmx_free(mright);
407			return(NULL);
408			}
409			if (verbose) {
410	greg	2.13	fputs(inspec, stderr);
411	greg	2.1	fputs(": added in matrix\n", stderr);
412			}
413			rmx_free(mright);
414	greg	2.13	mres = mleft;
415			break;
416			case '*':
417			case '/': {
418			const char * tnam = (op == '/') ?
419	greg	2.11	"division" : "multiplication";
420			errno = 0;
421	greg	2.13	if (!rmx_elemult(mleft, mright, (op == '/'))) {
422	greg	2.11	fprintf(stderr, "%s: element-wise %s failed\n",
423	greg	2.13	inspec, tnam);
424			rmx_free(mleft);
425	greg	2.11	rmx_free(mright);
426			return(NULL);
427			}
428			if (errno)
429			fprintf(stderr,
430			"%s: warning - error during element-wise %s\n",
431	greg	2.13	inspec, tnam);
432	greg	2.11	else if (verbose)
433	greg	2.13	fprintf(stderr, "%s: element-wise %s\n", inspec, tnam);
434	greg	2.11	rmx_free(mright);
435	greg	2.13	mres = mleft;
436			} break;
437			default:
438			fprintf(stderr, "%s: unknown operation '%c'\n", inspec, op);
439			rmx_free(mleft);
440	greg	2.1	rmx_free(mright);
441			return(NULL);
442			}
443	greg	2.13	return(mres);
444			}
445
446			/* Perform matrix operations from left to right */
447			static RMATRIX *
448			op_left2right(ROPMAT *mop)
449			{
450			RMATRIX *mleft = loadop(mop);
451
452			while (mop->binop) {
453			if (mleft == NULL)
454			break;
455			mleft = binaryop(mop[1].inspec,
456			mleft, mop->binop, loadop(mop+1));
457			mop++;
458			}
459	greg	2.1	return(mleft);
460			}
461
462	greg	2.13	/* Perform matrix operations from right to left */
463			static RMATRIX *
464			op_right2left(ROPMAT *mop)
465			{
466			RMATRIX *mright;
467			int rpos = 0;
468			/* find end of list */
469			while (mop[rpos].binop)
470	greg	2.14	if (mop[rpos++].binop != '.') {
471			fputs(
472			"Right-to-left evaluation only for matrix multiplication!\n",
473			stderr);
474			return(NULL);
475			}
476	greg	2.13	mright = loadop(mop+rpos);
477			while (rpos-- > 0) {
478			if (mright == NULL)
479			break;
480	greg	2.20	mright = binaryop(mop[rpos+1].inspec,
481	greg	2.13	loadop(mop+rpos), mop[rpos].binop, mright);
482			}
483			return(mright);
484			}
485
486			#define t_nrows(mop) ((mop)->preop.transpose ? (mop)->mtx->ncols \
487			: (mop)->mtx->nrows)
488			#define t_ncols(mop) ((mop)->preop.transpose ? (mop)->mtx->nrows \
489			: (mop)->mtx->ncols)
490
491			/* Should we prefer concatenating from rightmost matrix towards left? */
492			static int
493			prefer_right2left(ROPMAT *mop)
494			{
495			int mri = 0;
496
497			while (mop[mri].binop) /* find rightmost matrix */
498			if (mop[mri++].binop != '.')
499			return(0); /* pre-empt reversal for other ops */
500
501			if (mri <= 1)
502			return(0); /* won't matter */
503
504			if (loadmatrix(mop+mri) < 0) /* load rightmost cat */
505			return(1); /* fail will bail in a moment */
506
507			if (t_ncols(mop+mri) == 1)
508			return(1); /* definitely better R->L */
509
510			if (t_ncols(mop+mri) >= t_nrows(mop+mri))
511			return(0); /* ...probably worse */
512
513			if (loadmatrix(mop) < 0) /* load leftmost */
514			return(0); /* fail will bail in a moment */
515
516			return(t_ncols(mop+mri) < t_nrows(mop));
517			}
518
519	greg	2.1	static int
520			get_factors(double da[], int n, char *av[])
521			{
522			int ac;
523
524			for (ac = 0; ac < n && isflt(av[ac]); ac++)
525			da[ac] = atof(av[ac]);
526			return(ac);
527			}
528
529	greg	2.13	static ROPMAT *
530	greg	2.26	resize_moparr(ROPMAT *mop, int n2alloc)
531	greg	2.13	{
532			int nmats = 0;
533	greg	2.26	int i;
534	greg	2.13
535			while (mop[nmats++].binop)
536			;
537	greg	2.26	for (i = nmats; i > n2alloc; i--)
538			rmx_free(mop[i].mtx);
539	greg	2.13	mop = (ROPMAT )realloc(mop, n2allocsizeof(ROPMAT));
540			if (mop == NULL) {
541	greg	2.26	fputs("Out of memory in resize_moparr()\n", stderr);
542	greg	2.13	exit(1);
543			}
544			if (n2alloc > nmats)
545			memset(mop+nmats, 0, (n2alloc-nmats)*sizeof(ROPMAT));
546			return(mop);
547			}
548
549	greg	2.1	/* Load one or more matrices and operate on them, sending results to stdout */
550			int
551			main(int argc, char *argv[])
552			{
553	greg	2.27	int outfmt = DTfromHeader;
554			const char *defCsym = NULL;
555			int nall = 2;
556			ROPMAT mop = (ROPMAT )calloc(nall, sizeof(ROPMAT));
557			int nmats = 0;
558			RMATRIX *mres = NULL;
559			int stdin_used = 0;
560			int i;
561	greg	2.1	/* get options and arguments */
562	greg	2.13	for (i = 1; i < argc; i++) {
563	greg	2.11	if (argv[i][0] && !argv[i][1] &&
564	greg	2.13	strchr(".+*/", argv[i][0]) != NULL) {
565	greg	2.15	if (!nmats \|\| mop[nmats-1].binop) {
566	greg	2.14	fprintf(stderr,
567	greg	2.15	"%s: missing matrix argument before '%c' operation\n",
568	greg	2.14	argv[0], argv[i][0]);
569	greg	2.13	return(1);
570			}
571	greg	2.15	mop[nmats-1].binop = argv[i][0];
572	greg	2.1	} else if (argv[i][0] != '-' \|\| !argv[i][1]) {
573	greg	2.13	if (argv[i][0] == '-') {
574			if (stdin_used++) {
575			fprintf(stderr,
576			"%s: standard input used for more than one matrix\n",
577			argv[0]);
578			return(1);
579			}
580			mop[nmats].inspec = stdin_name;
581			} else
582			mop[nmats].inspec = argv[i];
583	greg	2.27	if (!mop[nmats].preop.csym)
584			mop[nmats].preop.csym = defCsym;
585	greg	2.13	if (nmats > 0 && !mop[nmats-1].binop)
586			mop[nmats-1].binop = '.';
587			nmats++;
588	greg	2.1	} else {
589			int n = argc-1 - i;
590			switch (argv[i][1]) { /* get option */
591			case 'v':
592	greg	2.14	verbose++;
593	greg	2.1	break;
594			case 'f':
595			switch (argv[i][2]) {
596			case 'd':
597			outfmt = DTdouble;
598			break;
599			case 'f':
600			outfmt = DTfloat;
601			break;
602			case 'a':
603			outfmt = DTascii;
604			break;
605			case 'c':
606			outfmt = DTrgbe;
607			break;
608			default:
609			goto userr;
610			}
611			break;
612			case 't':
613	greg	2.13	mop[nmats].preop.transpose = 1;
614	greg	2.1	break;
615			case 's':
616			if (n > MAXCOMP) n = MAXCOMP;
617	greg	2.13	i += mop[nmats].preop.nsf =
618			get_factors(mop[nmats].preop.sca,
619			n, argv+i+1);
620	greg	2.22	if (mop[nmats].preop.nsf <= 0) {
621			fprintf(stderr, "%s: -s missing arguments\n",
622			argv[0]);
623			goto userr;
624			}
625	greg	2.1	break;
626	greg	2.27	case 'C':
627			if (!n \|\| isflt(argv[i+1]))
628			goto userr;
629			defCsym = mop[nmats].preop.csym = argv[++i];
630			mop[nmats].preop.clen = 0;
631			break;
632	greg	2.1	case 'c':
633	greg	2.27	if (n && !isflt(argv[i+1])) {
634			mop[nmats].preop.csym = argv[++i];
635	greg	2.22	mop[nmats].preop.clen = 0;
636			break;
637			}
638	greg	2.1	if (n > MAXCOMPMAXCOMP) n = MAXCOMPMAXCOMP;
639	greg	2.13	i += mop[nmats].preop.clen =
640			get_factors(mop[nmats].preop.cmat,
641			n, argv+i+1);
642	greg	2.22	if (mop[nmats].preop.clen <= 0) {
643			fprintf(stderr, "%s: -c missing arguments\n",
644			argv[0]);
645			goto userr;
646			}
647	greg	2.27	mop[nmats].preop.csym = NULL;
648	greg	2.1	break;
649	greg	2.18	case 'r':
650			if (argv[i][2] == 'f')
651			mop[nmats].rmp = RMPreflF;
652			else if (argv[i][2] == 'b')
653			mop[nmats].rmp = RMPreflB;
654			else
655			goto userr;
656			break;
657	greg	2.1	default:
658			fprintf(stderr, "%s: unknown operation '%s'\n",
659			argv[0], argv[i]);
660			goto userr;
661			}
662			}
663	greg	2.14	if (nmats >= nall)
664	greg	2.26	mop = resize_moparr(mop, nall += 2);
665	greg	2.13	}
666			if (mop[0].inspec == NULL) /* nothing to do? */
667	greg	2.1	goto userr;
668	greg	2.15	if (mop[nmats-1].binop) {
669			fprintf(stderr,
670			"%s: missing matrix argument after '%c' operation\n",
671			argv[0], mop[nmats-1].binop);
672			return(1);
673			}
674	greg	2.13	/* favor quicker concatenation */
675	greg	2.14	mop[nmats].mtx = prefer_right2left(mop) ? op_right2left(mop)
676			: op_left2right(mop);
677			if (mop[nmats].mtx == NULL)
678			return(1);
679			/* apply trailing unary operations */
680			mop[nmats].inspec = "trailing_ops";
681			mres = loadop(mop+nmats);
682			if (mres == NULL)
683	greg	2.13	return(1);
684	greg	2.22	if (outfmt == DTfromHeader) /* check data type */
685	greg	2.6	outfmt = mres->dtype;
686	greg	2.22	if (outfmt == DTrgbe) {
687			if (mres->ncomp > 3)
688			outfmt = DTspec;
689			else if (mres->dtype == DTxyze)
690			outfmt = DTxyze;
691			}
692	greg	2.26	newheader("RADIANCE", stdout); /* write result to stdout */
693	greg	2.1	printargs(argc, argv, stdout);
694	greg	2.23	return(rmx_write(mres, outfmt, stdout) ? 0 : 1);
695	greg	2.1	userr:
696			fprintf(stderr,
697	greg	2.26	"Usage: %s [-v][-f{adfc}][-t][-s sf .. \| -c ce ..][-rf\|-rb] m1 [.+*/] .. > mres\n",
698	greg	2.1	argv[0]);
699			return(1);
700			}