src/util/rmtxop.c

#ifndef lint
static const char RCSid[] = "$Id: rmtxop.c,v 2.22 2023/11/27 22:04:45 greg Exp $";
#endif
/*
 * General component matrix operations.
 */

#include <stdlib.h>
#include <errno.h>
#include <ctype.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          sca[MAXCOMP];           /* scalar coefficients */
        double          cmat[MAXCOMP*MAXCOMP];  /* component transformation */
        short           nsf;                    /* number of scalars */
        short           clen;                   /* number of coefficients */
        char            csym[11];               /* symbolic coefficients */
        char            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);
}

/* 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;
                scolorblack(sclr);
                sclr[i] = 1;
                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;

        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':
                        sensrow(rop, j, scolor2scotopic);
                        for (i = nc; i--; )
                                rop->preop.cmat[j*nc+i] *= WHTSCOTOPIC;
                        break;
                case 'M':
                        sensrow(rop, j, scolor2melanopic);
                        for (i = nc; i--; )
                                rop->preop.cmat[j*nc+i] *= WHTMELANOPIC;
                        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[0] &&               /* 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;
                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 *
grow_moparray(ROPMAT *mop, int n2alloc)
{
        int     nmats = 0;

        while (mop[nmats++].binop)
                ;
        mop = (ROPMAT *)realloc(mop, n2alloc*sizeof(ROPMAT));
        if (mop == NULL) {
                fputs("Out of memory in grow_moparray()\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;
        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 (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 && isupper(argv[i+1][0])) {
                                        strlcpy(mop[nmats].preop.csym,
                                                argv[++i],
                                                sizeof(mop[0].preop.csym));
                                        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[0] = '\0';
                                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 = grow_moparray(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;
        }
        if (outfmt != DTascii)          /* write result to stdout */
                SET_FILE_BINARY(stdout);
        newheader("RADIANCE", 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:	2.23
Committed:	Tue Nov 28 16:36:50 2023 UTC (4 months, 4 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.22:	+5 -13 lines
Log Message:	fix(rmtxop): Eliminated redundant error messages
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.23	static const char RCSid[] = "$Id: rmtxop.c,v 2.22 2023/11/27 22:04:45 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* General component matrix operations.
6			*/
7
8			#include <stdlib.h>
9	greg	2.11	#include <errno.h>
10	greg	2.22	#include <ctype.h>
11	greg	2.1	#include "rtio.h"
12			#include "resolu.h"
13			#include "rmatrix.h"
14	greg	2.10	#include "platform.h"
15	greg	2.1
16	greg	2.22	#define MAXCOMP MAXCSAMP /* #components we support */
17	greg	2.1
18	greg	2.22	/* Unary matrix operation(s) */
19	greg	2.1	typedef struct {
20			double sca[MAXCOMP]; /* scalar coefficients */
21			double cmat[MAXCOMPMAXCOMP]; / component transformation */
22	greg	2.13	short nsf; /* number of scalars */
23			short clen; /* number of coefficients */
24	greg	2.22	char csym[11]; /* symbolic coefficients */
25			char transpose; /* do transpose? */
26	greg	2.13	} RUNARYOP;
27
28	greg	2.22	/* Matrix input source and requested operation(s) */
29	greg	2.13	typedef struct {
30			const char inspec; / input specification */
31	greg	2.18	RMPref rmp; /* matrix preference */
32	greg	2.13	RUNARYOP preop; /* unary operation(s) */
33			RMATRIX mtx; / original matrix if loaded */
34			int binop; /* binary op with next (or 0) */
35			} ROPMAT;
36	greg	2.1
37			int verbose = 0; /* verbose reporting? */
38
39	greg	2.13	/* Load matrix */
40			static int
41			loadmatrix(ROPMAT *rop)
42	greg	2.1	{
43	greg	2.20	if (rop->mtx != NULL) /* already loaded? */
44	greg	2.13	return(0);
45
46	greg	2.18	rop->mtx = rmx_load(rop->inspec, rop->rmp);
47	greg	2.23
48			return(!rop->mtx ? -1 : 1);
49	greg	2.1	}
50
51	greg	2.22	/* Compute conversion row from spectrum to one channel of RGB */
52			static void
53			rgbrow(ROPMAT *rop, int r, int p)
54			{
55			const int nc = rop->mtx->ncomp;
56			const float * wlp = rop->mtx->wlpart;
57			int i;
58
59			for (i = nc; i--; ) {
60			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
61			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
62			COLOR crgb;
63			spec_rgb(crgb, nmStart, nmEnd);
64			rop->preop.cmat[r*nc+i] = crgb[p];
65			}
66			}
67
68			/* Compute conversion row from spectrum to one channel of XYZ */
69			static void
70			xyzrow(ROPMAT *rop, int r, int p)
71			{
72			const int nc = rop->mtx->ncomp;
73			const float * wlp = rop->mtx->wlpart;
74			int i;
75
76			for (i = nc; i--; ) {
77			int nmEnd = wlp[0] + (wlp[3] - wlp[0])*i/nc;
78			int nmStart = wlp[0] + (wlp[3] - wlp[0])*(i+1)/nc;
79			COLOR cxyz;
80			spec_cie(cxyz, nmStart, nmEnd);
81			rop->preop.cmat[r*nc+i] = cxyz[p];
82			}
83			}
84
85			/* Use the spectral sensitivity function to compute matrix coefficients */
86			static void
87			sensrow(ROPMAT rop, int r, double (sf)(SCOLOR sc, int ncs, const float wlpt[4]))
88			{
89			const int nc = rop->mtx->ncomp;
90			int i;
91
92			for (i = nc; i--; ) {
93			SCOLOR sclr;
94			scolorblack(sclr);
95			sclr[i] = 1;
96			rop->preop.cmat[rnc+i] = (sf)(sclr, nc, rop->mtx->wlpart);
97			}
98			}
99
100			/* Check/set symbolic transform */
101			static int
102			checksymbolic(ROPMAT *rop)
103			{
104			const int nc = rop->mtx->ncomp;
105			const int dt = rop->mtx->dtype;
106			int i, j;
107
108			if (nc < 3) {
109			fprintf(stderr, "%s: -c '%s' requires at least 3 components\n",
110			rop->inspec, rop->preop.csym);
111			return(-1);
112			}
113			rop->preop.clen = strlen(rop->preop.csym) * nc;
114			if (rop->preop.clen > MAXCOMP*MAXCOMP) {
115			fprintf(stderr, "%s: -c '%s' results in too many components\n",
116			rop->inspec, rop->preop.csym);
117			return(-1);
118			}
119			for (j = 0; rop->preop.csym[j]; j++) {
120			int comp = 0;
121			switch (rop->preop.csym[j]) {
122			case 'B':
123			++comp;
124			/* fall through */
125			case 'G':
126			++comp;
127			/* fall through */
128			case 'R':
129			if (dt == DTxyze) {
130			for (i = 3; i--; )
131			rop->preop.cmat[jnc+i] = 1./WHTEFFICACY
132			xyz2rgbmat[comp][i];
133			} else if (nc == 3)
134			rop->preop.cmat[j*nc+comp] = 1.;
135			else
136			rgbrow(rop, j, comp);
137			break;
138			case 'Z':
139			++comp;
140			/* fall through */
141			case 'Y':
142			++comp;
143			/* fall through */
144			case 'X':
145			if (dt == DTxyze) {
146			rop->preop.cmat[j*nc+comp] = 1.;
147			} else if (nc == 3) {
148			for (i = 3; i--; )
149			rop->preop.cmat[j*nc+i] =
150			rgb2xyzmat[comp][i];
151			} else if (comp == CIEY)
152			sensrow(rop, j, scolor2photopic);
153			else
154			xyzrow(rop, j, comp);
155
156			for (i = nc*(dt != DTxyze); i--; )
157			rop->preop.cmat[jnc+i] = WHTEFFICACY;
158			break;
159			case 'S':
160			sensrow(rop, j, scolor2scotopic);
161			for (i = nc; i--; )
162			rop->preop.cmat[jnc+i] = WHTSCOTOPIC;
163			break;
164			case 'M':
165			sensrow(rop, j, scolor2melanopic);
166			for (i = nc; i--; )
167			rop->preop.cmat[jnc+i] = WHTMELANOPIC;
168			break;
169			default:
170			fprintf(stderr, "%s: -c '%c' unsupported\n",
171			rop->inspec, rop->preop.csym[j]);
172			return(-1);
173			}
174			}
175			/* return recommended output type */
176			if (!strcmp(rop->preop.csym, "XYZ")) {
177			if (dt <= DTspec)
178			return(DTxyze);
179			} else if (!strcmp(rop->preop.csym, "RGB")) {
180			if (dt <= DTspec)
181			return(DTrgbe);
182			}
183			if ((nc > 3) & (dt <= DTspec))
184			return(DTfloat); /* probably not actual spectrum */
185			return(0);
186			}
187
188	greg	2.13	/* Get matrix and perform unary operations */
189	greg	2.1	static RMATRIX *
190	greg	2.13	loadop(ROPMAT *rop)
191	greg	2.1	{
192	greg	2.22	int outtype = 0;
193	greg	2.13	RMATRIX *mres;
194	greg	2.22	int i, j;
195	greg	2.1
196	greg	2.13	if (loadmatrix(rop) < 0) /* make sure we're loaded */
197	greg	2.1	return(NULL);
198	greg	2.13
199	greg	2.22	if (rop->preop.csym[0] && /* symbolic transform? */
200			(outtype = checksymbolic(rop)) < 0)
201			goto failure;
202			if (rop->preop.clen > 0) { /* apply component transform? */
203			if (rop->preop.clen % rop->mtx->ncomp) {
204			fprintf(stderr, "%s: -c must have N x %d coefficients\n",
205			rop->inspec, rop->mtx->ncomp);
206			goto failure;
207			}
208			if (rop->preop.nsf > 0) { /* scale transform, first */
209			if (rop->preop.nsf == 1) {
210			for (i = rop->preop.clen; i--; )
211			rop->preop.cmat[i] *= rop->preop.sca[0];
212			} else if (rop->preop.nsf != rop->mtx->ncomp) {
213			fprintf(stderr, "%s: -s must have one or %d factors\n",
214			rop->inspec, rop->mtx->ncomp);
215			goto failure;
216			} else {
217			for (j = rop->preop.clen/rop->preop.nsf; j--; )
218			for (i = rop->preop.nsf; i--; )
219			rop->preop.cmat[jrop->preop.nsf+i] =
220			rop->preop.sca[i];
221			}
222			}
223			mres = rmx_transform(rop->mtx, rop->preop.clen/rop->mtx->ncomp,
224			rop->preop.cmat);
225			if (mres == NULL) {
226			fprintf(stderr, "%s: matrix transform failed\n",
227			rop->inspec);
228	greg	2.13	goto failure;
229	greg	2.1	}
230	greg	2.22	if (verbose)
231			fprintf(stderr, "%s: applied %d x %d transform%s\n",
232			rop->inspec, mres->ncomp,
233			rop->mtx->ncomp,
234			rop->preop.nsf ? " (* scalar)" : "");
235			rop->preop.nsf = 0;
236			if ((mres->ncomp > 3) & (mres->dtype <= DTspec))
237			outtype = DTfloat; /* probably not actual spectrum */
238			rmx_free(rop->mtx);
239			rop->mtx = mres;
240			}
241			if (rop->preop.nsf > 0) { /* apply scalar(s)? */
242	greg	2.13	if (rop->preop.nsf == 1) {
243			for (i = rop->mtx->ncomp; --i; )
244			rop->preop.sca[i] = rop->preop.sca[0];
245			} else if (rop->preop.nsf != rop->mtx->ncomp) {
246	greg	2.1	fprintf(stderr, "%s: -s must have one or %d factors\n",
247	greg	2.13	rop->inspec, rop->mtx->ncomp);
248			goto failure;
249	greg	2.1	}
250	greg	2.13	if (!rmx_scale(rop->mtx, rop->preop.sca)) {
251			fputs(rop->inspec, stderr);
252	greg	2.1	fputs(": scalar operation failed\n", stderr);
253	greg	2.13	goto failure;
254	greg	2.1	}
255			if (verbose) {
256	greg	2.13	fputs(rop->inspec, stderr);
257	greg	2.1	fputs(": applied scalar (", stderr);
258	greg	2.13	for (i = 0; i < rop->preop.nsf; i++)
259			fprintf(stderr, " %f", rop->preop.sca[i]);
260	greg	2.1	fputs(" )\n", stderr);
261			}
262			}
263	greg	2.22	if (rop->preop.transpose) { /* transpose matrix? */
264	greg	2.13	mres = rmx_transpose(rop->mtx);
265			if (mres == NULL) {
266			fputs(rop->inspec, stderr);
267	greg	2.12	fputs(": transpose failed\n", stderr);
268	greg	2.13	goto failure;
269	greg	2.12	}
270			if (verbose) {
271	greg	2.13	fputs(rop->inspec, stderr);
272	greg	2.12	fputs(": transposed rows and columns\n", stderr);
273			}
274	greg	2.13	rmx_free(rop->mtx);
275			rop->mtx = mres;
276			}
277			mres = rop->mtx;
278			rop->mtx = NULL;
279	greg	2.22	if (outtype)
280			mres->dtype = outtype;
281	greg	2.13	return(mres);
282			failure:
283			rmx_free(rop->mtx);
284			return(rop->mtx = NULL);
285			}
286
287			/* Execute binary operation, free matrix arguments and return new result */
288			static RMATRIX *
289			binaryop(const char inspec, RMATRIX mleft, int op, RMATRIX *mright)
290			{
291			RMATRIX *mres = NULL;
292			int i;
293
294			if ((mleft == NULL) \| (mright == NULL))
295			return(NULL);
296			switch (op) {
297			case '.': /* concatenate */
298	greg	2.16	if (mleft->ncomp != mright->ncomp) {
299			fputs(inspec, stderr);
300			fputs(": # components do not match\n", stderr);
301			} else if (mleft->ncols != mright->nrows) {
302			fputs(inspec, stderr);
303			fputs(": mismatched dimensions\n",
304			stderr);
305			} else
306			mres = rmx_multiply(mleft, mright);
307	greg	2.13	rmx_free(mleft);
308	greg	2.12	rmx_free(mright);
309	greg	2.1	if (mres == NULL) {
310	greg	2.13	fputs(inspec, stderr);
311	greg	2.16	fputs(": concatenation failed\n", stderr);
312	greg	2.1	return(NULL);
313			}
314			if (verbose) {
315	greg	2.13	fputs(inspec, stderr);
316	greg	2.1	fputs(": concatenated matrix\n", stderr);
317			}
318	greg	2.13	break;
319			case '+':
320			if (!rmx_sum(mleft, mright, NULL)) {
321			fputs(inspec, stderr);
322	greg	2.1	fputs(": matrix sum failed\n", stderr);
323	greg	2.13	rmx_free(mleft);
324	greg	2.1	rmx_free(mright);
325			return(NULL);
326			}
327			if (verbose) {
328	greg	2.13	fputs(inspec, stderr);
329	greg	2.1	fputs(": added in matrix\n", stderr);
330			}
331			rmx_free(mright);
332	greg	2.13	mres = mleft;
333			break;
334			case '*':
335			case '/': {
336			const char * tnam = (op == '/') ?
337	greg	2.11	"division" : "multiplication";
338			errno = 0;
339	greg	2.13	if (!rmx_elemult(mleft, mright, (op == '/'))) {
340	greg	2.11	fprintf(stderr, "%s: element-wise %s failed\n",
341	greg	2.13	inspec, tnam);
342			rmx_free(mleft);
343	greg	2.11	rmx_free(mright);
344			return(NULL);
345			}
346			if (errno)
347			fprintf(stderr,
348			"%s: warning - error during element-wise %s\n",
349	greg	2.13	inspec, tnam);
350	greg	2.11	else if (verbose)
351	greg	2.13	fprintf(stderr, "%s: element-wise %s\n", inspec, tnam);
352	greg	2.11	rmx_free(mright);
353	greg	2.13	mres = mleft;
354			} break;
355			default:
356			fprintf(stderr, "%s: unknown operation '%c'\n", inspec, op);
357			rmx_free(mleft);
358	greg	2.1	rmx_free(mright);
359			return(NULL);
360			}
361	greg	2.13	return(mres);
362			}
363
364			/* Perform matrix operations from left to right */
365			static RMATRIX *
366			op_left2right(ROPMAT *mop)
367			{
368			RMATRIX *mleft = loadop(mop);
369
370			while (mop->binop) {
371			if (mleft == NULL)
372			break;
373			mleft = binaryop(mop[1].inspec,
374			mleft, mop->binop, loadop(mop+1));
375			mop++;
376			}
377	greg	2.1	return(mleft);
378			}
379
380	greg	2.13	/* Perform matrix operations from right to left */
381			static RMATRIX *
382			op_right2left(ROPMAT *mop)
383			{
384			RMATRIX *mright;
385			int rpos = 0;
386			/* find end of list */
387			while (mop[rpos].binop)
388	greg	2.14	if (mop[rpos++].binop != '.') {
389			fputs(
390			"Right-to-left evaluation only for matrix multiplication!\n",
391			stderr);
392			return(NULL);
393			}
394	greg	2.13	mright = loadop(mop+rpos);
395			while (rpos-- > 0) {
396			if (mright == NULL)
397			break;
398	greg	2.20	mright = binaryop(mop[rpos+1].inspec,
399	greg	2.13	loadop(mop+rpos), mop[rpos].binop, mright);
400			}
401			return(mright);
402			}
403
404			#define t_nrows(mop) ((mop)->preop.transpose ? (mop)->mtx->ncols \
405			: (mop)->mtx->nrows)
406			#define t_ncols(mop) ((mop)->preop.transpose ? (mop)->mtx->nrows \
407			: (mop)->mtx->ncols)
408
409			/* Should we prefer concatenating from rightmost matrix towards left? */
410			static int
411			prefer_right2left(ROPMAT *mop)
412			{
413			int mri = 0;
414
415			while (mop[mri].binop) /* find rightmost matrix */
416			if (mop[mri++].binop != '.')
417			return(0); /* pre-empt reversal for other ops */
418
419			if (mri <= 1)
420			return(0); /* won't matter */
421
422			if (loadmatrix(mop+mri) < 0) /* load rightmost cat */
423			return(1); /* fail will bail in a moment */
424
425			if (t_ncols(mop+mri) == 1)
426			return(1); /* definitely better R->L */
427
428			if (t_ncols(mop+mri) >= t_nrows(mop+mri))
429			return(0); /* ...probably worse */
430
431			if (loadmatrix(mop) < 0) /* load leftmost */
432			return(0); /* fail will bail in a moment */
433
434			return(t_ncols(mop+mri) < t_nrows(mop));
435			}
436
437	greg	2.1	static int
438			get_factors(double da[], int n, char *av[])
439			{
440			int ac;
441
442			for (ac = 0; ac < n && isflt(av[ac]); ac++)
443			da[ac] = atof(av[ac]);
444			return(ac);
445			}
446
447	greg	2.13	static ROPMAT *
448			grow_moparray(ROPMAT *mop, int n2alloc)
449			{
450			int nmats = 0;
451
452			while (mop[nmats++].binop)
453			;
454			mop = (ROPMAT )realloc(mop, n2allocsizeof(ROPMAT));
455			if (mop == NULL) {
456			fputs("Out of memory in grow_moparray()\n", stderr);
457			exit(1);
458			}
459			if (n2alloc > nmats)
460			memset(mop+nmats, 0, (n2alloc-nmats)*sizeof(ROPMAT));
461			return(mop);
462			}
463
464	greg	2.1	/* Load one or more matrices and operate on them, sending results to stdout */
465			int
466			main(int argc, char *argv[])
467			{
468	greg	2.7	int outfmt = DTfromHeader;
469	greg	2.13	int nall = 2;
470			ROPMAT mop = (ROPMAT )calloc(nall, sizeof(ROPMAT));
471			int nmats = 0;
472	greg	2.1	RMATRIX *mres = NULL;
473	greg	2.13	int stdin_used = 0;
474	greg	2.1	int i;
475			/* get options and arguments */
476	greg	2.13	for (i = 1; i < argc; i++) {
477	greg	2.11	if (argv[i][0] && !argv[i][1] &&
478	greg	2.13	strchr(".+*/", argv[i][0]) != NULL) {
479	greg	2.15	if (!nmats \|\| mop[nmats-1].binop) {
480	greg	2.14	fprintf(stderr,
481	greg	2.15	"%s: missing matrix argument before '%c' operation\n",
482	greg	2.14	argv[0], argv[i][0]);
483	greg	2.13	return(1);
484			}
485	greg	2.15	mop[nmats-1].binop = argv[i][0];
486	greg	2.1	} else if (argv[i][0] != '-' \|\| !argv[i][1]) {
487	greg	2.13	if (argv[i][0] == '-') {
488			if (stdin_used++) {
489			fprintf(stderr,
490			"%s: standard input used for more than one matrix\n",
491			argv[0]);
492			return(1);
493			}
494			mop[nmats].inspec = stdin_name;
495			} else
496			mop[nmats].inspec = argv[i];
497			if (nmats > 0 && !mop[nmats-1].binop)
498			mop[nmats-1].binop = '.';
499			nmats++;
500	greg	2.1	} else {
501			int n = argc-1 - i;
502			switch (argv[i][1]) { /* get option */
503			case 'v':
504	greg	2.14	verbose++;
505	greg	2.1	break;
506			case 'f':
507			switch (argv[i][2]) {
508			case 'd':
509			outfmt = DTdouble;
510			break;
511			case 'f':
512			outfmt = DTfloat;
513			break;
514			case 'a':
515			outfmt = DTascii;
516			break;
517			case 'c':
518			outfmt = DTrgbe;
519			break;
520			default:
521			goto userr;
522			}
523			break;
524			case 't':
525	greg	2.13	mop[nmats].preop.transpose = 1;
526	greg	2.1	break;
527			case 's':
528			if (n > MAXCOMP) n = MAXCOMP;
529	greg	2.13	i += mop[nmats].preop.nsf =
530			get_factors(mop[nmats].preop.sca,
531			n, argv+i+1);
532	greg	2.22	if (mop[nmats].preop.nsf <= 0) {
533			fprintf(stderr, "%s: -s missing arguments\n",
534			argv[0]);
535			goto userr;
536			}
537	greg	2.1	break;
538			case 'c':
539	greg	2.22	if (n && isupper(argv[i+1][0])) {
540			strlcpy(mop[nmats].preop.csym,
541			argv[++i],
542			sizeof(mop[0].preop.csym));
543			mop[nmats].preop.clen = 0;
544			break;
545			}
546	greg	2.1	if (n > MAXCOMPMAXCOMP) n = MAXCOMPMAXCOMP;
547	greg	2.13	i += mop[nmats].preop.clen =
548			get_factors(mop[nmats].preop.cmat,
549			n, argv+i+1);
550	greg	2.22	if (mop[nmats].preop.clen <= 0) {
551			fprintf(stderr, "%s: -c missing arguments\n",
552			argv[0]);
553			goto userr;
554			}
555			mop[nmats].preop.csym[0] = '\0';
556	greg	2.1	break;
557	greg	2.18	case 'r':
558			if (argv[i][2] == 'f')
559			mop[nmats].rmp = RMPreflF;
560			else if (argv[i][2] == 'b')
561			mop[nmats].rmp = RMPreflB;
562			else
563			goto userr;
564			break;
565	greg	2.1	default:
566			fprintf(stderr, "%s: unknown operation '%s'\n",
567			argv[0], argv[i]);
568			goto userr;
569			}
570			}
571	greg	2.14	if (nmats >= nall)
572			mop = grow_moparray(mop, nall += 2);
573	greg	2.13	}
574			if (mop[0].inspec == NULL) /* nothing to do? */
575	greg	2.1	goto userr;
576	greg	2.15	if (mop[nmats-1].binop) {
577			fprintf(stderr,
578			"%s: missing matrix argument after '%c' operation\n",
579			argv[0], mop[nmats-1].binop);
580			return(1);
581			}
582	greg	2.13	/* favor quicker concatenation */
583	greg	2.14	mop[nmats].mtx = prefer_right2left(mop) ? op_right2left(mop)
584			: op_left2right(mop);
585			if (mop[nmats].mtx == NULL)
586			return(1);
587			/* apply trailing unary operations */
588			mop[nmats].inspec = "trailing_ops";
589			mres = loadop(mop+nmats);
590			if (mres == NULL)
591	greg	2.13	return(1);
592	greg	2.22	if (outfmt == DTfromHeader) /* check data type */
593	greg	2.6	outfmt = mres->dtype;
594	greg	2.22	if (outfmt == DTrgbe) {
595			if (mres->ncomp > 3)
596			outfmt = DTspec;
597			else if (mres->dtype == DTxyze)
598			outfmt = DTxyze;
599			}
600			if (outfmt != DTascii) /* write result to stdout */
601	greg	2.10	SET_FILE_BINARY(stdout);
602	greg	2.1	newheader("RADIANCE", stdout);
603			printargs(argc, argv, stdout);
604	greg	2.23
605			return(rmx_write(mres, outfmt, stdout) ? 0 : 1);
606	greg	2.1	userr:
607			fprintf(stderr,
608	greg	2.19	"Usage: %s [-v][-f[adfc][-t][-s sf .. \| -c ce ..][-rf\|-rb] m1 [.+*/] .. > mres\n",
609	greg	2.1	argv[0]);
610			return(1);
611			}