src/util/rmtxop.c

#ifndef lint
static const char RCSid[] = "$Id: rmtxop.c,v 2.26 2023/12/01 02:05:00 greg Exp $";
#endif
/*
 * General component matrix operations.
 */

#include <errno.h>
#include "rtio.h"
#include "resolu.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) & (refm.dtype != DTspec)) {
                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];
        }
        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;
        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':
                        ++comp;
                        /* fall through */
                case 'G':
                        ++comp;
                        /* fall through */
                case 'R':
                        if (dt == DTxyze) {
                                for (i = 3; i--; )
                                        rop->preop.cmat[j*nc+i] = 1./WHTEFFICACY *
                                                        xyz2rgbmat[comp][i];
                        } else if (nc == 3)
                                rop->preop.cmat[j*nc+comp] = 1.;
                        else
                                rgbrow(rop, j, comp);
                        break;
                case 'Z':
                        ++comp;
                        /* fall through */
                case 'Y':
                        ++comp;
                        /* fall through */
                case 'X':
                        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*(dt != DTxyze); i--; )
                                rop->preop.cmat[j*nc+i] *= WHTEFFICACY;
                        break;
                case 'S':               /* scotopic (il)luminance */
                        sensrow(rop, j, scolor2scotopic);
                        for (i = nc; i--; )
                                rop->preop.cmat[j*nc+i] *= WHTSCOTOPIC;
                        break;
                case 'M':               /* melanopic (il)luminance */
                        sensrow(rop, j, scolor2melanopic);
                        for (i = nc; i--; )
                                rop->preop.cmat[j*nc+i] *= WHTMELANOPIC;
                        break;
                case 'A':               /* average component */
                        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 (!strcmp(rop->preop.csym, "XYZ")) {
                if (dt <= DTspec)
                        return(DTxyze);
        } else if (!strcmp(rop->preop.csym, "RGB")) {
                if (dt <= DTspec)
                        return(DTrgbe);
        }
        if ((nc > 3) & (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) {
                                fprintf(stderr, "%s: -s must have one or %d factors\n",
                                                rop->inspec, rop->mtx->ncomp);
                                goto failure;
                        } else {
                                for (j = rop->preop.clen/rop->preop.nsf; j--; )
                                        for (i = rop->preop.nsf; i--; )
                                                rop->preop.cmat[j*rop->preop.nsf+i] *=
                                                                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:	2.27
Committed:	Sat Dec 2 00:42:21 2023 UTC (23 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.26:	+89 -20 lines
Log Message:	feat(rmtxop): Added -c _file_ and -C options for specifying color spaces
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.27	static const char RCSid[] = "$Id: rmtxop.c,v 2.26 2023/12/01 02:05:00 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 "resolu.h"
11			#include "rmatrix.h"
12	greg	2.10	#include "platform.h"
13	greg	2.1
14	greg	2.22	#define MAXCOMP MAXCSAMP /* #components we support */
15	greg	2.1
16	greg	2.22	/* Unary matrix operation(s) */
17	greg	2.1	typedef struct {
18	greg	2.27	double cmat[MAXCOMPMAXCOMP]; / component transformation */
19	greg	2.1	double sca[MAXCOMP]; /* scalar coefficients */
20	greg	2.27	const char csym; / symbolic coefs or file */
21			short clen; /* number of coefficients */
22	greg	2.13	short nsf; /* number of scalars */
23	greg	2.27	short transpose; /* do transpose? */
24	greg	2.13	} RUNARYOP;
25
26	greg	2.22	/* Matrix input source and requested operation(s) */
27	greg	2.13	typedef struct {
28			const char inspec; / input specification */
29	greg	2.18	RMPref rmp; /* matrix preference */
30	greg	2.13	RUNARYOP preop; /* unary operation(s) */
31			RMATRIX mtx; / original matrix if loaded */
32			int binop; /* binary op with next (or 0) */
33			} ROPMAT;
34	greg	2.1
35			int verbose = 0; /* verbose reporting? */
36
37	greg	2.13	/* Load matrix */
38			static int
39			loadmatrix(ROPMAT *rop)
40	greg	2.1	{
41	greg	2.20	if (rop->mtx != NULL) /* already loaded? */
42	greg	2.13	return(0);
43
44	greg	2.18	rop->mtx = rmx_load(rop->inspec, rop->rmp);
45	greg	2.23
46			return(!rop->mtx ? -1 : 1);
47	greg	2.1	}
48
49	greg	2.27	static int checksymbolic(ROPMAT *rop);
50
51			/* Check/set transform based on a reference input file */
52			static int
53			checkreffile(ROPMAT *rop)
54			{
55			static const char *curRF = NULL;
56			static RMATRIX refm;
57			const int nc = rop->mtx->ncomp;
58			int i;
59
60			if (!curRF \|\| strcmp(rop->preop.csym, curRF)) {
61			FILE *fp = fopen(rop->preop.csym, "rb");
62			if (!rmx_load_header(&refm, fp)) {
63			fprintf(stderr, "%s: cannot read info header\n",
64			rop->preop.csym);
65			curRF = NULL;
66			if (fp) fclose(fp);
67			return(-1);
68			}
69			fclose(fp);
70			curRF = rop->preop.csym;
71			}
72			if ((refm.ncomp == 3) & (refm.dtype != DTspec)) {
73			rop->preop.csym = (refm.dtype == DTxyze) ? "XYZ" : "RGB";
74			return(checksymbolic(rop));
75			}
76			if (refm.ncomp == 2) {
77			fprintf(stderr, "%s: cannot convert to 2 components\n",
78			curRF);
79			return(-1);
80			}
81			if (refm.ncomp == 1) {
82			rop->preop.csym = "Y"; /* XXX big assumption */
83			return(checksymbolic(rop));
84			}
85			if (refm.ncomp == nc &&
86			!memcmp(refm.wlpart, rop->mtx->wlpart, sizeof(refm.wlpart)))
87			return(0); /* nothing to do */
88
89			if ((nc <= 3) \| (nc > MAXCSAMP) \| (refm.ncomp > MAXCSAMP)) {
90			fprintf(stderr, "%s: cannot resample from %d to %d components\n",
91			curRF, nc, refm.ncomp);
92			return(-1);
93			}
94			rop->preop.clen = refm.ncomp * nc; /* compute spec to ref */
95
96			for (i = 0; i < nc; i++) {
97			SCOLOR scstim, scresp;
98			int j;
99			memset(scstim, 0, sizeof(COLORV)*nc);
100			scstim[i] = 1.f;
101			convertscolor(scresp, refm.ncomp, refm.wlpart[0], refm.wlpart[3],
102			scstim, nc, rop->mtx->wlpart[0], rop->mtx->wlpart[3]);
103			for (j = refm.ncomp; j-- > 0; )
104			rop->preop.cmat[j*nc + i] = scresp[j];
105			}
106			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			int i, j;
165	greg	2.27	/* check suffix => reference file */
166			if (strchr(rop->preop.csym, '.') > rop->preop.csym)
167			return(checkreffile(rop));
168	greg	2.22
169			if (nc < 3) {
170			fprintf(stderr, "%s: -c '%s' requires at least 3 components\n",
171			rop->inspec, rop->preop.csym);
172			return(-1);
173			}
174			rop->preop.clen = strlen(rop->preop.csym) * nc;
175			if (rop->preop.clen > MAXCOMP*MAXCOMP) {
176			fprintf(stderr, "%s: -c '%s' results in too many components\n",
177			rop->inspec, rop->preop.csym);
178			return(-1);
179			}
180			for (j = 0; rop->preop.csym[j]; j++) {
181			int comp = 0;
182			switch (rop->preop.csym[j]) {
183			case 'B':
184			++comp;
185			/* fall through */
186			case 'G':
187			++comp;
188			/* fall through */
189			case 'R':
190			if (dt == DTxyze) {
191			for (i = 3; i--; )
192			rop->preop.cmat[jnc+i] = 1./WHTEFFICACY
193			xyz2rgbmat[comp][i];
194			} else if (nc == 3)
195			rop->preop.cmat[j*nc+comp] = 1.;
196			else
197			rgbrow(rop, j, comp);
198			break;
199			case 'Z':
200			++comp;
201			/* fall through */
202			case 'Y':
203			++comp;
204			/* fall through */
205			case 'X':
206			if (dt == DTxyze) {
207			rop->preop.cmat[j*nc+comp] = 1.;
208			} else if (nc == 3) {
209			for (i = 3; i--; )
210			rop->preop.cmat[j*nc+i] =
211			rgb2xyzmat[comp][i];
212			} else if (comp == CIEY)
213			sensrow(rop, j, scolor2photopic);
214			else
215			xyzrow(rop, j, comp);
216
217			for (i = nc*(dt != DTxyze); i--; )
218			rop->preop.cmat[jnc+i] = WHTEFFICACY;
219			break;
220	greg	2.24	case 'S': /* scotopic (il)luminance */
221	greg	2.22	sensrow(rop, j, scolor2scotopic);
222			for (i = nc; i--; )
223			rop->preop.cmat[jnc+i] = WHTSCOTOPIC;
224			break;
225	greg	2.24	case 'M': /* melanopic (il)luminance */
226	greg	2.22	sensrow(rop, j, scolor2melanopic);
227			for (i = nc; i--; )
228			rop->preop.cmat[jnc+i] = WHTMELANOPIC;
229			break;
230	greg	2.24	case 'A': /* average component */
231			for (i = nc; i--; )
232	greg	2.25	rop->preop.cmat[j*nc+i] = 1./(double)nc;
233	greg	2.24	break;
234	greg	2.22	default:
235			fprintf(stderr, "%s: -c '%c' unsupported\n",
236			rop->inspec, rop->preop.csym[j]);
237			return(-1);
238			}
239			}
240			/* return recommended output type */
241			if (!strcmp(rop->preop.csym, "XYZ")) {
242			if (dt <= DTspec)
243			return(DTxyze);
244			} else if (!strcmp(rop->preop.csym, "RGB")) {
245			if (dt <= DTspec)
246			return(DTrgbe);
247			}
248			if ((nc > 3) & (dt <= DTspec))
249			return(DTfloat); /* probably not actual spectrum */
250			return(0);
251			}
252
253	greg	2.13	/* Get matrix and perform unary operations */
254	greg	2.1	static RMATRIX *
255	greg	2.13	loadop(ROPMAT *rop)
256	greg	2.1	{
257	greg	2.22	int outtype = 0;
258	greg	2.13	RMATRIX *mres;
259	greg	2.22	int i, j;
260	greg	2.1
261	greg	2.13	if (loadmatrix(rop) < 0) /* make sure we're loaded */
262	greg	2.1	return(NULL);
263	greg	2.13
264	greg	2.27	if (rop->preop.csym && /* symbolic transform? */
265	greg	2.22	(outtype = checksymbolic(rop)) < 0)
266			goto failure;
267			if (rop->preop.clen > 0) { /* apply component transform? */
268			if (rop->preop.clen % rop->mtx->ncomp) {
269			fprintf(stderr, "%s: -c must have N x %d coefficients\n",
270			rop->inspec, rop->mtx->ncomp);
271			goto failure;
272			}
273			if (rop->preop.nsf > 0) { /* scale transform, first */
274			if (rop->preop.nsf == 1) {
275			for (i = rop->preop.clen; i--; )
276			rop->preop.cmat[i] *= rop->preop.sca[0];
277			} else if (rop->preop.nsf != rop->mtx->ncomp) {
278			fprintf(stderr, "%s: -s must have one or %d factors\n",
279			rop->inspec, rop->mtx->ncomp);
280			goto failure;
281			} else {
282			for (j = rop->preop.clen/rop->preop.nsf; j--; )
283			for (i = rop->preop.nsf; i--; )
284			rop->preop.cmat[jrop->preop.nsf+i] =
285			rop->preop.sca[i];
286			}
287			}
288			mres = rmx_transform(rop->mtx, rop->preop.clen/rop->mtx->ncomp,
289			rop->preop.cmat);
290			if (mres == NULL) {
291			fprintf(stderr, "%s: matrix transform failed\n",
292			rop->inspec);
293	greg	2.13	goto failure;
294	greg	2.1	}
295	greg	2.22	if (verbose)
296			fprintf(stderr, "%s: applied %d x %d transform%s\n",
297			rop->inspec, mres->ncomp,
298			rop->mtx->ncomp,
299			rop->preop.nsf ? " (* scalar)" : "");
300	greg	2.26	rop->preop.nsf = 0; /* now folded in */
301	greg	2.22	if ((mres->ncomp > 3) & (mres->dtype <= DTspec))
302			outtype = DTfloat; /* probably not actual spectrum */
303			rmx_free(rop->mtx);
304			rop->mtx = mres;
305			}
306			if (rop->preop.nsf > 0) { /* apply scalar(s)? */
307	greg	2.13	if (rop->preop.nsf == 1) {
308			for (i = rop->mtx->ncomp; --i; )
309			rop->preop.sca[i] = rop->preop.sca[0];
310			} else if (rop->preop.nsf != rop->mtx->ncomp) {
311	greg	2.1	fprintf(stderr, "%s: -s must have one or %d factors\n",
312	greg	2.13	rop->inspec, rop->mtx->ncomp);
313			goto failure;
314	greg	2.1	}
315	greg	2.13	if (!rmx_scale(rop->mtx, rop->preop.sca)) {
316			fputs(rop->inspec, stderr);
317	greg	2.1	fputs(": scalar operation failed\n", stderr);
318	greg	2.13	goto failure;
319	greg	2.1	}
320			if (verbose) {
321	greg	2.13	fputs(rop->inspec, stderr);
322	greg	2.1	fputs(": applied scalar (", stderr);
323	greg	2.13	for (i = 0; i < rop->preop.nsf; i++)
324			fprintf(stderr, " %f", rop->preop.sca[i]);
325	greg	2.1	fputs(" )\n", stderr);
326			}
327			}
328	greg	2.22	if (rop->preop.transpose) { /* transpose matrix? */
329	greg	2.13	mres = rmx_transpose(rop->mtx);
330			if (mres == NULL) {
331			fputs(rop->inspec, stderr);
332	greg	2.12	fputs(": transpose failed\n", stderr);
333	greg	2.13	goto failure;
334	greg	2.12	}
335			if (verbose) {
336	greg	2.13	fputs(rop->inspec, stderr);
337	greg	2.12	fputs(": transposed rows and columns\n", stderr);
338			}
339	greg	2.13	rmx_free(rop->mtx);
340			rop->mtx = mres;
341			}
342			mres = rop->mtx;
343			rop->mtx = NULL;
344	greg	2.22	if (outtype)
345			mres->dtype = outtype;
346	greg	2.13	return(mres);
347			failure:
348			rmx_free(rop->mtx);
349			return(rop->mtx = NULL);
350			}
351
352			/* Execute binary operation, free matrix arguments and return new result */
353			static RMATRIX *
354			binaryop(const char inspec, RMATRIX mleft, int op, RMATRIX *mright)
355			{
356			RMATRIX *mres = NULL;
357			int i;
358
359			if ((mleft == NULL) \| (mright == NULL))
360			return(NULL);
361			switch (op) {
362			case '.': /* concatenate */
363	greg	2.16	if (mleft->ncomp != mright->ncomp) {
364			fputs(inspec, stderr);
365			fputs(": # components do not match\n", stderr);
366			} else if (mleft->ncols != mright->nrows) {
367			fputs(inspec, stderr);
368			fputs(": mismatched dimensions\n",
369			stderr);
370			} else
371			mres = rmx_multiply(mleft, mright);
372	greg	2.13	rmx_free(mleft);
373	greg	2.12	rmx_free(mright);
374	greg	2.1	if (mres == NULL) {
375	greg	2.13	fputs(inspec, stderr);
376	greg	2.16	fputs(": concatenation failed\n", stderr);
377	greg	2.1	return(NULL);
378			}
379			if (verbose) {
380	greg	2.13	fputs(inspec, stderr);
381	greg	2.1	fputs(": concatenated matrix\n", stderr);
382			}
383	greg	2.13	break;
384			case '+':
385			if (!rmx_sum(mleft, mright, NULL)) {
386			fputs(inspec, stderr);
387	greg	2.1	fputs(": matrix sum failed\n", stderr);
388	greg	2.13	rmx_free(mleft);
389	greg	2.1	rmx_free(mright);
390			return(NULL);
391			}
392			if (verbose) {
393	greg	2.13	fputs(inspec, stderr);
394	greg	2.1	fputs(": added in matrix\n", stderr);
395			}
396			rmx_free(mright);
397	greg	2.13	mres = mleft;
398			break;
399			case '*':
400			case '/': {
401			const char * tnam = (op == '/') ?
402	greg	2.11	"division" : "multiplication";
403			errno = 0;
404	greg	2.13	if (!rmx_elemult(mleft, mright, (op == '/'))) {
405	greg	2.11	fprintf(stderr, "%s: element-wise %s failed\n",
406	greg	2.13	inspec, tnam);
407			rmx_free(mleft);
408	greg	2.11	rmx_free(mright);
409			return(NULL);
410			}
411			if (errno)
412			fprintf(stderr,
413			"%s: warning - error during element-wise %s\n",
414	greg	2.13	inspec, tnam);
415	greg	2.11	else if (verbose)
416	greg	2.13	fprintf(stderr, "%s: element-wise %s\n", inspec, tnam);
417	greg	2.11	rmx_free(mright);
418	greg	2.13	mres = mleft;
419			} break;
420			default:
421			fprintf(stderr, "%s: unknown operation '%c'\n", inspec, op);
422			rmx_free(mleft);
423	greg	2.1	rmx_free(mright);
424			return(NULL);
425			}
426	greg	2.13	return(mres);
427			}
428
429			/* Perform matrix operations from left to right */
430			static RMATRIX *
431			op_left2right(ROPMAT *mop)
432			{
433			RMATRIX *mleft = loadop(mop);
434
435			while (mop->binop) {
436			if (mleft == NULL)
437			break;
438			mleft = binaryop(mop[1].inspec,
439			mleft, mop->binop, loadop(mop+1));
440			mop++;
441			}
442	greg	2.1	return(mleft);
443			}
444
445	greg	2.13	/* Perform matrix operations from right to left */
446			static RMATRIX *
447			op_right2left(ROPMAT *mop)
448			{
449			RMATRIX *mright;
450			int rpos = 0;
451			/* find end of list */
452			while (mop[rpos].binop)
453	greg	2.14	if (mop[rpos++].binop != '.') {
454			fputs(
455			"Right-to-left evaluation only for matrix multiplication!\n",
456			stderr);
457			return(NULL);
458			}
459	greg	2.13	mright = loadop(mop+rpos);
460			while (rpos-- > 0) {
461			if (mright == NULL)
462			break;
463	greg	2.20	mright = binaryop(mop[rpos+1].inspec,
464	greg	2.13	loadop(mop+rpos), mop[rpos].binop, mright);
465			}
466			return(mright);
467			}
468
469			#define t_nrows(mop) ((mop)->preop.transpose ? (mop)->mtx->ncols \
470			: (mop)->mtx->nrows)
471			#define t_ncols(mop) ((mop)->preop.transpose ? (mop)->mtx->nrows \
472			: (mop)->mtx->ncols)
473
474			/* Should we prefer concatenating from rightmost matrix towards left? */
475			static int
476			prefer_right2left(ROPMAT *mop)
477			{
478			int mri = 0;
479
480			while (mop[mri].binop) /* find rightmost matrix */
481			if (mop[mri++].binop != '.')
482			return(0); /* pre-empt reversal for other ops */
483
484			if (mri <= 1)
485			return(0); /* won't matter */
486
487			if (loadmatrix(mop+mri) < 0) /* load rightmost cat */
488			return(1); /* fail will bail in a moment */
489
490			if (t_ncols(mop+mri) == 1)
491			return(1); /* definitely better R->L */
492
493			if (t_ncols(mop+mri) >= t_nrows(mop+mri))
494			return(0); /* ...probably worse */
495
496			if (loadmatrix(mop) < 0) /* load leftmost */
497			return(0); /* fail will bail in a moment */
498
499			return(t_ncols(mop+mri) < t_nrows(mop));
500			}
501
502	greg	2.1	static int
503			get_factors(double da[], int n, char *av[])
504			{
505			int ac;
506
507			for (ac = 0; ac < n && isflt(av[ac]); ac++)
508			da[ac] = atof(av[ac]);
509			return(ac);
510			}
511
512	greg	2.13	static ROPMAT *
513	greg	2.26	resize_moparr(ROPMAT *mop, int n2alloc)
514	greg	2.13	{
515			int nmats = 0;
516	greg	2.26	int i;
517	greg	2.13
518			while (mop[nmats++].binop)
519			;
520	greg	2.26	for (i = nmats; i > n2alloc; i--)
521			rmx_free(mop[i].mtx);
522	greg	2.13	mop = (ROPMAT )realloc(mop, n2allocsizeof(ROPMAT));
523			if (mop == NULL) {
524	greg	2.26	fputs("Out of memory in resize_moparr()\n", stderr);
525	greg	2.13	exit(1);
526			}
527			if (n2alloc > nmats)
528			memset(mop+nmats, 0, (n2alloc-nmats)*sizeof(ROPMAT));
529			return(mop);
530			}
531
532	greg	2.1	/* Load one or more matrices and operate on them, sending results to stdout */
533			int
534			main(int argc, char *argv[])
535			{
536	greg	2.27	int outfmt = DTfromHeader;
537			const char *defCsym = NULL;
538			int nall = 2;
539			ROPMAT mop = (ROPMAT )calloc(nall, sizeof(ROPMAT));
540			int nmats = 0;
541			RMATRIX *mres = NULL;
542			int stdin_used = 0;
543			int i;
544	greg	2.1	/* get options and arguments */
545	greg	2.13	for (i = 1; i < argc; i++) {
546	greg	2.11	if (argv[i][0] && !argv[i][1] &&
547	greg	2.13	strchr(".+*/", argv[i][0]) != NULL) {
548	greg	2.15	if (!nmats \|\| mop[nmats-1].binop) {
549	greg	2.14	fprintf(stderr,
550	greg	2.15	"%s: missing matrix argument before '%c' operation\n",
551	greg	2.14	argv[0], argv[i][0]);
552	greg	2.13	return(1);
553			}
554	greg	2.15	mop[nmats-1].binop = argv[i][0];
555	greg	2.1	} else if (argv[i][0] != '-' \|\| !argv[i][1]) {
556	greg	2.13	if (argv[i][0] == '-') {
557			if (stdin_used++) {
558			fprintf(stderr,
559			"%s: standard input used for more than one matrix\n",
560			argv[0]);
561			return(1);
562			}
563			mop[nmats].inspec = stdin_name;
564			} else
565			mop[nmats].inspec = argv[i];
566	greg	2.27	if (!mop[nmats].preop.csym)
567			mop[nmats].preop.csym = defCsym;
568	greg	2.13	if (nmats > 0 && !mop[nmats-1].binop)
569			mop[nmats-1].binop = '.';
570			nmats++;
571	greg	2.1	} else {
572			int n = argc-1 - i;
573			switch (argv[i][1]) { /* get option */
574			case 'v':
575	greg	2.14	verbose++;
576	greg	2.1	break;
577			case 'f':
578			switch (argv[i][2]) {
579			case 'd':
580			outfmt = DTdouble;
581			break;
582			case 'f':
583			outfmt = DTfloat;
584			break;
585			case 'a':
586			outfmt = DTascii;
587			break;
588			case 'c':
589			outfmt = DTrgbe;
590			break;
591			default:
592			goto userr;
593			}
594			break;
595			case 't':
596	greg	2.13	mop[nmats].preop.transpose = 1;
597	greg	2.1	break;
598			case 's':
599			if (n > MAXCOMP) n = MAXCOMP;
600	greg	2.13	i += mop[nmats].preop.nsf =
601			get_factors(mop[nmats].preop.sca,
602			n, argv+i+1);
603	greg	2.22	if (mop[nmats].preop.nsf <= 0) {
604			fprintf(stderr, "%s: -s missing arguments\n",
605			argv[0]);
606			goto userr;
607			}
608	greg	2.1	break;
609	greg	2.27	case 'C':
610			if (!n \|\| isflt(argv[i+1]))
611			goto userr;
612			defCsym = mop[nmats].preop.csym = argv[++i];
613			mop[nmats].preop.clen = 0;
614			break;
615	greg	2.1	case 'c':
616	greg	2.27	if (n && !isflt(argv[i+1])) {
617			mop[nmats].preop.csym = argv[++i];
618	greg	2.22	mop[nmats].preop.clen = 0;
619			break;
620			}
621	greg	2.1	if (n > MAXCOMPMAXCOMP) n = MAXCOMPMAXCOMP;
622	greg	2.13	i += mop[nmats].preop.clen =
623			get_factors(mop[nmats].preop.cmat,
624			n, argv+i+1);
625	greg	2.22	if (mop[nmats].preop.clen <= 0) {
626			fprintf(stderr, "%s: -c missing arguments\n",
627			argv[0]);
628			goto userr;
629			}
630	greg	2.27	mop[nmats].preop.csym = NULL;
631	greg	2.1	break;
632	greg	2.18	case 'r':
633			if (argv[i][2] == 'f')
634			mop[nmats].rmp = RMPreflF;
635			else if (argv[i][2] == 'b')
636			mop[nmats].rmp = RMPreflB;
637			else
638			goto userr;
639			break;
640	greg	2.1	default:
641			fprintf(stderr, "%s: unknown operation '%s'\n",
642			argv[0], argv[i]);
643			goto userr;
644			}
645			}
646	greg	2.14	if (nmats >= nall)
647	greg	2.26	mop = resize_moparr(mop, nall += 2);
648	greg	2.13	}
649			if (mop[0].inspec == NULL) /* nothing to do? */
650	greg	2.1	goto userr;
651	greg	2.15	if (mop[nmats-1].binop) {
652			fprintf(stderr,
653			"%s: missing matrix argument after '%c' operation\n",
654			argv[0], mop[nmats-1].binop);
655			return(1);
656			}
657	greg	2.13	/* favor quicker concatenation */
658	greg	2.14	mop[nmats].mtx = prefer_right2left(mop) ? op_right2left(mop)
659			: op_left2right(mop);
660			if (mop[nmats].mtx == NULL)
661			return(1);
662			/* apply trailing unary operations */
663			mop[nmats].inspec = "trailing_ops";
664			mres = loadop(mop+nmats);
665			if (mres == NULL)
666	greg	2.13	return(1);
667	greg	2.22	if (outfmt == DTfromHeader) /* check data type */
668	greg	2.6	outfmt = mres->dtype;
669	greg	2.22	if (outfmt == DTrgbe) {
670			if (mres->ncomp > 3)
671			outfmt = DTspec;
672			else if (mres->dtype == DTxyze)
673			outfmt = DTxyze;
674			}
675	greg	2.26	newheader("RADIANCE", stdout); /* write result to stdout */
676	greg	2.1	printargs(argc, argv, stdout);
677	greg	2.23	return(rmx_write(mres, outfmt, stdout) ? 0 : 1);
678	greg	2.1	userr:
679			fprintf(stderr,
680	greg	2.26	"Usage: %s [-v][-f{adfc}][-t][-s sf .. \| -c ce ..][-rf\|-rb] m1 [.+*/] .. > mres\n",
681	greg	2.1	argv[0]);
682			return(1);
683			}