src/util/dctimestep.c

#ifndef lint
static const char RCSid[] = "$Id: dctimestep.c,v 2.50 2025/03/01 04:50:13 greg Exp $";
#endif
/*
 * Compute time-step result using Daylight Coefficient method.
 *
 *      G. Ward
 */

#include <ctype.h>
#include "platform.h"
#include "standard.h"
#include "cmatrix.h"
#include "platform.h"
#include "resolu.h"

char    *progname;                      /* global argv[0] */

/* Sum together a set of images and write result to fout */
static int
sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
{
        int     myDT = DTfromHeader;
        COLR    *scanline = NULL;
        CMATRIX *pmat = NULL;
        int     myXR=0, myYR=0;
        int     i, y;

        if (cv->ncols != 1)
                error(INTERNAL, "expected vector in sum_images()");
        for (i = 0; i < cv->nrows; i++) {
                const COLORV    *scv = cv_lval(cv,i);
                int             flat_file = 0;
                char            fname[1024];
                FILE            *fp;
                long            data_start;
                int             dt, xr, yr;
                COLORV          *psp;
                char            *err;
                                                        /* check for zero */
                if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
                                (myDT != DTfromHeader) | (i < cv->nrows-1))
                        continue;
                                                        /* open next picture */
                sprintf(fname, fspec, i);
                if ((fp = fopen(fname, "rb")) == NULL) {
                        sprintf(errmsg, "cannot open picture '%s'", fname);
                        error(SYSTEM, errmsg);
                }
#ifdef getc_unlocked
                flockfile(fp);
#endif
                dt = DTfromHeader;
                if ((err = cm_getheader(&dt, NULL, NULL, NULL, NULL, fp)) != NULL)
                        error(USER, err);
                if ((dt != DTrgbe) & (dt != DTxyze) ||
                                !fscnresolu(&xr, &yr, fp)) {
                        sprintf(errmsg, "file '%s' not a picture", fname);
                        error(USER, errmsg);
                }
                if (myDT == DTfromHeader) {             /* on first one */
                        myDT = dt;
                        myXR = xr; myYR = yr;
                        scanline = (COLR *)malloc(sizeof(COLR)*myXR);
                        if (scanline == NULL)
                                error(SYSTEM, "out of memory in sum_images()");
                        pmat = cm_alloc(myYR, myXR);
                        memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
                                                        /* finish header */
                        fputformat(cm_fmt_id[myDT], fout);
                        fputc('\n', fout);
                        fflush(fout);
                } else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
                        sprintf(errmsg, "picture '%s' format/size mismatch",
                                        fname);
                        error(USER, errmsg);
                }
                                                        /* flat file check */
                if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
                        flat_file = (ftell(fp) >= data_start + sizeof(COLR)*xr*yr);
                        if (fseek(fp, data_start, SEEK_SET) < 0) {
                                sprintf(errmsg, "cannot seek on picture '%s'", fname);
                                error(SYSTEM, errmsg);
                        }
                }
                psp = pmat->cmem;
                for (y = 0; y < yr; y++) {              /* read it in */
                        COLOR   col;
                        int     x;
                        if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr :
                                        freadcolrs(scanline, xr, fp) < 0) {
                                sprintf(errmsg, "error reading picture '%s'",
                                                fname);
                                error(SYSTEM, errmsg);
                        }
                                                        /* sum in scanline */
                        for (x = 0; x < xr; x++, psp += 3) {
                                if (!scanline[x][EXP])
                                        continue;       /* skip zeroes */
                                colr_color(col, scanline[x]);
                                multcolor(col, scv);
                                addcolor(psp, col);
                        }
                }
                fclose(fp);                             /* done this picture */
        }
        free(scanline);
        i = cm_write(pmat, myDT, fout);                 /* write picture */
        cm_free(pmat);                                  /* free data */
        return(i);
}

/* adjust matrix dimensions according to user size(s) */
static int
alt_dim(CMATRIX *cm, int nr, int nc)
{
        if ((nr <= 0) & (nc <= 0))
                return(0);
        if ((nr == cm->nrows) & (nc == cm->ncols))
                return(0);
        if (nr > 0) {
                if (nc <= 0)
                        nc = cm->nrows*cm->ncols/nr;
                if (nr*nc != cm->nrows*cm->ncols) {
                        fprintf(stderr, "Bad dimensions: %dx%d != %dx%d\n",
                                        nr, nc, cm->nrows, cm->ncols);
                        return(-1);
                }
        } else /* nc > 0 */ {
                nr = cm->nrows*cm->ncols/nc;
                if (nc*nr != cm->nrows*cm->ncols) {
                        fprintf(stderr, "Bad dimensions: %d does not divide %dx%d evenly\n",
                                        nc, cm->nrows, cm->ncols);
                        return(-1);
                }
        }
        cm->nrows = nr;
        cm->ncols = nc;
        return(1);
}

/* check to see if a string contains a %d or %o specification */
static int
hasNumberFormat(const char *s)
{
        if (s == NULL)
                return(0);

        while (*s) {
                while (*s != '%')
                        if (!*s++)
                                return(0);
                if (*++s == '%') {              /* ignore "%%" */
                        ++s;
                        continue;
                }
                while (isdigit(*s))             /* field length */
                        ++s;
                                                /* field we'll use? */
                if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
                                        (*s == 'x') | (*s == 'X'))
                        return(1);
        }
        return(0);                              /* didn't find one */
}

int
main(int argc, char *argv[])
{
        int             skyfmt = DTfromHeader;
        int             outfmt = DTascii;
        int             headout = 1;
        int             nsteps = 0;
        char            *ofspec = NULL;
        FILE            *ofp = stdout;
        int             xres=0, yres=0;
        CMATRIX         *cmtx;          /* component vector/matrix result */
        char            fnbuf[256];
        int             a, i;

        progname = argv[0];
                                        /* get options */
        for (a = 1; a < argc && argv[a][0] == '-'; a++)
                switch (argv[a][1]) {
                case 'n':
                        nsteps = atoi(argv[++a]);
                        if (nsteps < 0)
                                goto userr;
                        skyfmt = nsteps ? DTascii : DTfromHeader;
                        break;
                case 'h':
                        headout = !headout;
                        break;
                case 'i':
                        switch (argv[a][2]) {
                        case 'f':
                                skyfmt = DTfloat;
                                break;
                        case 'd':
                                skyfmt = DTdouble;
                                break;
                        case 'a':
                                skyfmt = DTascii;
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'o':
                        switch (argv[a][2]) {
                        case '\0':      /* output specification (not format) */
                                ofspec = argv[++a];
                                break;
                        case 'f':
                                outfmt = DTfloat;
                                break;
                        case 'd':
                                outfmt = DTdouble;
                                break;
                        case 'a':
                                outfmt = DTascii;
                                break;
                        case 'c':
                                outfmt = DTrgbe;
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'x':
                        xres = atoi(argv[++a]);
                        break;
                case 'y':
                        yres = atoi(argv[++a]);
                        break;
                default:
                        goto userr;
                }
        if ((argc-a < 1) | (argc-a > 4))
                goto userr;

        if (argc-a > 2) {                       /* VTDs expression */
                CMATRIX         *smtx, *Dmat, *Tmat, *imtx;
                const char      *ccp;
                                                /* get sky vector/matrix */
                smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
                nsteps = smtx->ncols;
                                                /* load BSDF */
                if (argv[a+1][0] != '!' &&
                                (ccp = strrchr(argv[a+1], '.')) != NULL &&
                                !strcasecmp(ccp+1, "XML"))
                        Tmat = cm_loadBTDF(argv[a+1]);
                else
                        Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
                                                /* load Daylight matrix */
                Dmat = cm_load(argv[a+2], Tmat->ncols,
                                        smtx->nrows, DTfromHeader);
                                                /* multiply vector through */
                imtx = cm_multiply(Dmat, smtx);
                cm_free(Dmat); cm_free(smtx);
                cmtx = cm_multiply(Tmat, imtx);
                cm_free(Tmat); 
                cm_free(imtx);
        } else {                                /* sky vector/matrix only */
                cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
                nsteps = cmtx->ncols;
        }
                                                /* prepare output stream */
        if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
                sprintf(fnbuf, ofspec, 1);
                ofspec = fnbuf;
        }
        if (ofspec != NULL && !hasNumberFormat(ofspec)) {
                if ((ofp = fopen(ofspec, "w")) == NULL) {
                        fprintf(stderr, "%s: cannot open '%s' for output\n",
                                        progname, ofspec);
                        return(1);
                }
                ofspec = NULL;                  /* only need to open once */
        }
        if (hasNumberFormat(argv[a])) {         /* generating image(s) */
                if (outfmt != DTrgbe) {
                        error(WARNING, "changing output type to -oc");
                        outfmt = DTrgbe;
                }
                if (ofspec == NULL) {
                        SET_FILE_BINARY(ofp);
                        newheader("RADIANCE", ofp);
                        printargs(argc, argv, ofp);
                        fputnow(ofp);
                }
                if (nsteps > 1)                 /* multiple output frames? */
                        for (i = 0; i < nsteps; i++) {
                                CMATRIX *cvec = cm_column(cmtx, i);
                                if (ofspec != NULL) {
                                        sprintf(fnbuf, ofspec, i);
                                        if ((ofp = fopen(fnbuf, "wb")) == NULL) {
                                                fprintf(stderr,
                                        "%s: cannot open '%s' for output\n",
                                                        progname, fnbuf);
                                                return(1);
                                        }
                                        newheader("RADIANCE", ofp);
                                        printargs(argc, argv, ofp);
                                        fputnow(ofp);
                                }
                                fprintf(ofp, "FRAME=%d\n", i);
                                if (!sum_images(argv[a], cvec, ofp))
                                        return(1);
                                if (ofspec != NULL) {
                                        if (fclose(ofp) == EOF) {
                                                fprintf(stderr,
                                                "%s: error writing to '%s'\n",
                                                        progname, fnbuf);
                                                return(1);
                                        }
                                        ofp = stdout;
                                }
                                cm_free(cvec);
                        }
                else if (!sum_images(argv[a], cmtx, ofp))
                        return(1);
        } else {                                /* generating vector/matrix */
                CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
                CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
                cm_free(Vmat);
                if (ofspec != NULL) {           /* multiple vector files? */
                        const char      *wtype = (outfmt==DTascii) ? "w" : "wb";
                        for (i = 0; i < nsteps; i++) {
                                CMATRIX *rvec = cm_column(rmtx, i);
                                if (alt_dim(rvec, yres, xres) < 0)
                                        return(1);
                                sprintf(fnbuf, ofspec, i);
                                if ((ofp = fopen(fnbuf, wtype)) == NULL) {
                                        fprintf(stderr,
                                        "%s: cannot open '%s' for output\n",
                                                        progname, fnbuf);
                                        return(1);
                                }
#ifdef getc_unlocked
                                flockfile(ofp);
#endif
                                if (headout) {  /* header output */
                                        newheader("RADIANCE", ofp);
                                        printargs(argc, argv, ofp);
                                        fputnow(ofp);
                                        fprintf(ofp, "FRAME=%d\n", i);
                                        if ((outfmt != DTrgbe) & (outfmt != DTxyze)) {
                                                fprintf(ofp, "NROWS=%d\n", rvec->nrows);
                                                fprintf(ofp, "NCOLS=%d\n", rvec->ncols);
                                                fputs("NCOMP=3\n", ofp);
                                        }
                                        if ((outfmt == DTfloat) | (outfmt == DTdouble))
                                                fputendian(ofp);
                                        fputformat(cm_fmt_id[outfmt], ofp);
                                        fputc('\n', ofp);
                                }
                                cm_write(rvec, outfmt, ofp);
                                if (fclose(ofp) == EOF) {
                                        fprintf(stderr,
                                                "%s: error writing to '%s'\n",
                                                        progname, fnbuf);
                                        return(1);
                                }
                                ofp = stdout;
                                cm_free(rvec);
                        }
                } else {
#ifdef getc_unlocked
                        flockfile(ofp);
#endif
                        if (outfmt != DTascii)
                                SET_FILE_BINARY(ofp);
                        if (alt_dim(rmtx, yres, xres) < 0)
                                return(1);
                        if (headout) {          /* header output */
                                newheader("RADIANCE", ofp);
                                printargs(argc, argv, ofp);
                                fputnow(ofp);
                                if ((outfmt != DTrgbe) & (outfmt != DTxyze)) {
                                        fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
                                        fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
                                        fputs("NCOMP=3\n", ofp);
                                }
                                if ((outfmt == DTfloat) | (outfmt == DTdouble))
                                        fputendian(ofp);
                                fputformat(cm_fmt_id[outfmt], ofp);
                                fputc('\n', ofp);
                        }
                        cm_write(rmtx, outfmt, ofp);
                }
                cm_free(rmtx);
        }
        if (fflush(ofp) == EOF) {               /* final clean-up */
                fprintf(stderr, "%s: write error on output\n", progname);
                return(1);
        }
        cm_free(cmtx);
        return(0);
userr:
        fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f|d|h}][-o{f|d|c}] DCspec [skyf]\n",
                                progname);
        fprintf(stderr, "   or: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f|d|h}][-o{f|d|c}] Vspec Tbsdf Dmat.dat [skyf]\n",
                                progname);
        return(1);
}
Revision:	2.51
Committed:	Wed Mar 5 02:54:58 2025 UTC (8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.50:	+2 -2 lines
Log Message:	perf(dctimestep,dcglare): Improved flat picture detection
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.51	static const char RCSid[] = "$Id: dctimestep.c,v 2.50 2025/03/01 04:50:13 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Compute time-step result using Daylight Coefficient method.
6			*
7			* G. Ward
8			*/
9
10			#include <ctype.h>
11	schorsch	2.37	#include "platform.h"
12	greg	2.1	#include "standard.h"
13	greg	2.28	#include "cmatrix.h"
14	greg	2.1	#include "platform.h"
15			#include "resolu.h"
16
17			char progname; / global argv[0] */
18
19	greg	2.24	/* Sum together a set of images and write result to fout */
20	greg	2.1	static int
21	greg	2.13	sum_images(const char fspec, const CMATRIX cv, FILE *fout)
22	greg	2.1	{
23			int myDT = DTfromHeader;
24	greg	2.38	COLR *scanline = NULL;
25	greg	2.24	CMATRIX *pmat = NULL;
26			int myXR=0, myYR=0;
27	greg	2.1	int i, y;
28
29			if (cv->ncols != 1)
30	greg	2.35	error(INTERNAL, "expected vector in sum_images()");
31	greg	2.1	for (i = 0; i < cv->nrows; i++) {
32			const COLORV *scv = cv_lval(cv,i);
33	greg	2.39	int flat_file = 0;
34	greg	2.1	char fname[1024];
35			FILE *fp;
36	greg	2.39	long data_start;
37	greg	2.1	int dt, xr, yr;
38			COLORV *psp;
39	greg	2.31	char *err;
40	greg	2.14	/* check for zero */
41	greg	2.19	if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
42			(myDT != DTfromHeader) \| (i < cv->nrows-1))
43	greg	2.14	continue;
44	greg	2.1	/* open next picture */
45			sprintf(fname, fspec, i);
46	greg	2.31	if ((fp = fopen(fname, "rb")) == NULL) {
47	greg	2.1	sprintf(errmsg, "cannot open picture '%s'", fname);
48			error(SYSTEM, errmsg);
49			}
50	greg	2.50	#ifdef getc_unlocked
51			flockfile(fp);
52			#endif
53	greg	2.31	dt = DTfromHeader;
54	greg	2.45	if ((err = cm_getheader(&dt, NULL, NULL, NULL, NULL, fp)) != NULL)
55	greg	2.31	error(USER, err);
56	greg	2.1	if ((dt != DTrgbe) & (dt != DTxyze) \|\|
57			!fscnresolu(&xr, &yr, fp)) {
58			sprintf(errmsg, "file '%s' not a picture", fname);
59			error(USER, errmsg);
60			}
61			if (myDT == DTfromHeader) { /* on first one */
62			myDT = dt;
63			myXR = xr; myYR = yr;
64	greg	2.38	scanline = (COLR )malloc(sizeof(COLR)myXR);
65	greg	2.1	if (scanline == NULL)
66			error(SYSTEM, "out of memory in sum_images()");
67			pmat = cm_alloc(myYR, myXR);
68			memset(pmat->cmem, 0, sizeof(COLOR)myXRmyYR);
69	greg	2.2	/* finish header */
70	greg	2.46	fputformat(cm_fmt_id[myDT], fout);
71	greg	2.13	fputc('\n', fout);
72			fflush(fout);
73	greg	2.1	} else if ((dt != myDT) \| (xr != myXR) \| (yr != myYR)) {
74			sprintf(errmsg, "picture '%s' format/size mismatch",
75			fname);
76			error(USER, errmsg);
77			}
78	greg	2.39	/* flat file check */
79			if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
80	greg	2.51	flat_file = (ftell(fp) >= data_start + sizeof(COLR)xryr);
81	greg	2.39	if (fseek(fp, data_start, SEEK_SET) < 0) {
82			sprintf(errmsg, "cannot seek on picture '%s'", fname);
83			error(SYSTEM, errmsg);
84			}
85			}
86	greg	2.1	psp = pmat->cmem;
87			for (y = 0; y < yr; y++) { /* read it in */
88	greg	2.38	COLOR col;
89	greg	2.1	int x;
90	greg	2.39	if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr :
91			freadcolrs(scanline, xr, fp) < 0) {
92	greg	2.1	sprintf(errmsg, "error reading picture '%s'",
93			fname);
94			error(SYSTEM, errmsg);
95			}
96			/* sum in scanline */
97			for (x = 0; x < xr; x++, psp += 3) {
98	greg	2.38	if (!scanline[x][EXP])
99			continue; /* skip zeroes */
100			colr_color(col, scanline[x]);
101			multcolor(col, scv);
102			addcolor(psp, col);
103	greg	2.1	}
104			}
105			fclose(fp); /* done this picture */
106			}
107			free(scanline);
108	greg	2.30	i = cm_write(pmat, myDT, fout); /* write picture */
109			cm_free(pmat); /* free data */
110			return(i);
111	greg	2.1	}
112
113	greg	2.49	/* adjust matrix dimensions according to user size(s) */
114			static int
115			alt_dim(CMATRIX *cm, int nr, int nc)
116			{
117			if ((nr <= 0) & (nc <= 0))
118			return(0);
119			if ((nr == cm->nrows) & (nc == cm->ncols))
120			return(0);
121			if (nr > 0) {
122			if (nc <= 0)
123			nc = cm->nrows*cm->ncols/nr;
124			if (nrnc != cm->nrowscm->ncols) {
125			fprintf(stderr, "Bad dimensions: %dx%d != %dx%d\n",
126			nr, nc, cm->nrows, cm->ncols);
127			return(-1);
128			}
129			} else /* nc > 0 */ {
130			nr = cm->nrows*cm->ncols/nc;
131			if (ncnr != cm->nrowscm->ncols) {
132			fprintf(stderr, "Bad dimensions: %d does not divide %dx%d evenly\n",
133			nc, cm->nrows, cm->ncols);
134			return(-1);
135			}
136			}
137			cm->nrows = nr;
138			cm->ncols = nc;
139			return(1);
140			}
141
142	greg	2.11	/* check to see if a string contains a %d or %o specification */
143			static int
144			hasNumberFormat(const char *s)
145	greg	2.1	{
146	greg	2.24	if (s == NULL)
147			return(0);
148
149	greg	2.18	while (*s) {
150			while (*s != '%')
151			if (!*s++)
152			return(0);
153			if (++s == '%') { / ignore "%%" */
154			++s;
155			continue;
156			}
157			while (isdigit(s)) / field length */
158			++s;
159			/* field we'll use? */
160			if ((s == 'd') \| (s == 'i') \| (*s == 'o') \|
161			(s == 'x') \| (s == 'X'))
162			return(1);
163			}
164			return(0); /* didn't find one */
165	greg	2.1	}
166
167			int
168			main(int argc, char *argv[])
169			{
170	greg	2.34	int skyfmt = DTfromHeader;
171	greg	2.30	int outfmt = DTascii;
172	greg	2.34	int headout = 1;
173			int nsteps = 0;
174	greg	2.24	char *ofspec = NULL;
175			FILE *ofp = stdout;
176	greg	2.47	int xres=0, yres=0;
177	greg	2.24	CMATRIX cmtx; / component vector/matrix result */
178			char fnbuf[256];
179			int a, i;
180	greg	2.1
181			progname = argv[0];
182	greg	2.24	/* get options */
183	greg	2.25	for (a = 1; a < argc && argv[a][0] == '-'; a++)
184			switch (argv[a][1]) {
185	greg	2.24	case 'n':
186			nsteps = atoi(argv[++a]);
187	greg	2.31	if (nsteps < 0)
188	greg	2.24	goto userr;
189	greg	2.34	skyfmt = nsteps ? DTascii : DTfromHeader;
190			break;
191			case 'h':
192			headout = !headout;
193	greg	2.24	break;
194	greg	2.25	case 'i':
195			switch (argv[a][2]) {
196			case 'f':
197			skyfmt = DTfloat;
198			break;
199			case 'd':
200			skyfmt = DTdouble;
201			break;
202			case 'a':
203			skyfmt = DTascii;
204			break;
205			default:
206			goto userr;
207			}
208			break;
209	greg	2.30	case 'o':
210			switch (argv[a][2]) {
211			case '\0': /* output specification (not format) */
212			ofspec = argv[++a];
213			break;
214			case 'f':
215			outfmt = DTfloat;
216			break;
217			case 'd':
218			outfmt = DTdouble;
219			break;
220			case 'a':
221			outfmt = DTascii;
222			break;
223	greg	2.43	case 'c':
224			outfmt = DTrgbe;
225			break;
226	greg	2.30	default:
227			goto userr;
228			}
229			break;
230	greg	2.47	case 'x':
231			xres = atoi(argv[++a]);
232			break;
233			case 'y':
234			yres = atoi(argv[++a]);
235			break;
236	greg	2.24	default:
237			goto userr;
238			}
239			if ((argc-a < 1) \| (argc-a > 4))
240			goto userr;
241	greg	2.1
242	greg	2.24	if (argc-a > 2) { /* VTDs expression */
243	greg	2.36	CMATRIX smtx, Dmat, Tmat, imtx;
244			const char *ccp;
245	greg	2.24	/* get sky vector/matrix */
246	greg	2.25	smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
247	greg	2.35	nsteps = smtx->ncols;
248	greg	2.12	/* load BSDF */
249	greg	2.36	if (argv[a+1][0] != '!' &&
250			(ccp = strrchr(argv[a+1], '.')) != NULL &&
251			!strcasecmp(ccp+1, "XML"))
252			Tmat = cm_loadBTDF(argv[a+1]);
253			else
254			Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
255	greg	2.5	/* load Daylight matrix */
256	greg	2.36	Dmat = cm_load(argv[a+2], Tmat->ncols,
257	greg	2.24	smtx->nrows, DTfromHeader);
258	greg	2.1	/* multiply vector through */
259	greg	2.24	imtx = cm_multiply(Dmat, smtx);
260			cm_free(Dmat); cm_free(smtx);
261	greg	2.29	cmtx = cm_multiply(Tmat, imtx);
262			cm_free(Tmat);
263	greg	2.24	cm_free(imtx);
264			} else { /* sky vector/matrix only */
265	greg	2.25	cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
266	greg	2.35	nsteps = cmtx->ncols;
267	greg	2.24	}
268			/* prepare output stream */
269			if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
270			sprintf(fnbuf, ofspec, 1);
271			ofspec = fnbuf;
272			}
273			if (ofspec != NULL && !hasNumberFormat(ofspec)) {
274			if ((ofp = fopen(ofspec, "w")) == NULL) {
275			fprintf(stderr, "%s: cannot open '%s' for output\n",
276			progname, ofspec);
277			return(1);
278			}
279			ofspec = NULL; /* only need to open once */
280	greg	2.12	}
281	greg	2.24	if (hasNumberFormat(argv[a])) { /* generating image(s) */
282	greg	2.44	if (outfmt != DTrgbe) {
283			error(WARNING, "changing output type to -oc");
284			outfmt = DTrgbe;
285			}
286	greg	2.24	if (ofspec == NULL) {
287			SET_FILE_BINARY(ofp);
288			newheader("RADIANCE", ofp);
289			printargs(argc, argv, ofp);
290			fputnow(ofp);
291			}
292			if (nsteps > 1) /* multiple output frames? */
293			for (i = 0; i < nsteps; i++) {
294			CMATRIX *cvec = cm_column(cmtx, i);
295			if (ofspec != NULL) {
296	greg	2.40	sprintf(fnbuf, ofspec, i);
297	greg	2.24	if ((ofp = fopen(fnbuf, "wb")) == NULL) {
298			fprintf(stderr,
299			"%s: cannot open '%s' for output\n",
300			progname, fnbuf);
301			return(1);
302			}
303			newheader("RADIANCE", ofp);
304			printargs(argc, argv, ofp);
305			fputnow(ofp);
306			}
307	greg	2.40	fprintf(ofp, "FRAME=%d\n", i);
308	greg	2.24	if (!sum_images(argv[a], cvec, ofp))
309			return(1);
310			if (ofspec != NULL) {
311			if (fclose(ofp) == EOF) {
312			fprintf(stderr,
313			"%s: error writing to '%s'\n",
314			progname, fnbuf);
315			return(1);
316			}
317			ofp = stdout;
318			}
319			cm_free(cvec);
320			}
321			else if (!sum_images(argv[a], cmtx, ofp))
322	greg	2.1	return(1);
323	greg	2.24	} else { /* generating vector/matrix */
324			CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
325			CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
326	greg	2.1	cm_free(Vmat);
327	greg	2.30	if (ofspec != NULL) { /* multiple vector files? */
328			const char *wtype = (outfmt==DTascii) ? "w" : "wb";
329	greg	2.24	for (i = 0; i < nsteps; i++) {
330			CMATRIX *rvec = cm_column(rmtx, i);
331	greg	2.49	if (alt_dim(rvec, yres, xres) < 0)
332			return(1);
333	greg	2.40	sprintf(fnbuf, ofspec, i);
334	greg	2.30	if ((ofp = fopen(fnbuf, wtype)) == NULL) {
335	greg	2.24	fprintf(stderr,
336			"%s: cannot open '%s' for output\n",
337			progname, fnbuf);
338			return(1);
339			}
340	greg	2.31	#ifdef getc_unlocked
341			flockfile(ofp);
342			#endif
343	greg	2.34	if (headout) { /* header output */
344			newheader("RADIANCE", ofp);
345			printargs(argc, argv, ofp);
346			fputnow(ofp);
347	greg	2.40	fprintf(ofp, "FRAME=%d\n", i);
348	greg	2.47	if ((outfmt != DTrgbe) & (outfmt != DTxyze)) {
349			fprintf(ofp, "NROWS=%d\n", rvec->nrows);
350			fprintf(ofp, "NCOLS=%d\n", rvec->ncols);
351			fputs("NCOMP=3\n", ofp);
352			}
353			if ((outfmt == DTfloat) \| (outfmt == DTdouble))
354	greg	2.42	fputendian(ofp);
355	greg	2.46	fputformat(cm_fmt_id[outfmt], ofp);
356	greg	2.34	fputc('\n', ofp);
357			}
358	greg	2.30	cm_write(rvec, outfmt, ofp);
359	greg	2.24	if (fclose(ofp) == EOF) {
360			fprintf(stderr,
361			"%s: error writing to '%s'\n",
362			progname, fnbuf);
363			return(1);
364			}
365			ofp = stdout;
366			cm_free(rvec);
367			}
368	greg	2.30	} else {
369	greg	2.31	#ifdef getc_unlocked
370			flockfile(ofp);
371			#endif
372	greg	2.30	if (outfmt != DTascii)
373			SET_FILE_BINARY(ofp);
374	greg	2.49	if (alt_dim(rmtx, yres, xres) < 0)
375			return(1);
376	greg	2.34	if (headout) { /* header output */
377	greg	2.30	newheader("RADIANCE", ofp);
378			printargs(argc, argv, ofp);
379			fputnow(ofp);
380	greg	2.47	if ((outfmt != DTrgbe) & (outfmt != DTxyze)) {
381			fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
382			fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
383			fputs("NCOMP=3\n", ofp);
384			}
385			if ((outfmt == DTfloat) \| (outfmt == DTdouble))
386	greg	2.42	fputendian(ofp);
387	greg	2.46	fputformat(cm_fmt_id[outfmt], ofp);
388	greg	2.30	fputc('\n', ofp);
389			}
390			cm_write(rmtx, outfmt, ofp);
391			}
392	greg	2.24	cm_free(rmtx);
393			}
394			if (fflush(ofp) == EOF) { /* final clean-up */
395			fprintf(stderr, "%s: write error on output\n", progname);
396			return(1);
397	greg	2.1	}
398	greg	2.24	cm_free(cmtx);
399	greg	2.1	return(0);
400	greg	2.24	userr:
401	greg	2.48	fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f\|d\|h}][-o{f\|d\|c}] DCspec [skyf]\n",
402	greg	2.24	progname);
403	greg	2.48	fprintf(stderr, " or: %s [-n nsteps][-o ospec][-x xr][-y yr][-i{f\|d\|h}][-o{f\|d\|c}] Vspec Tbsdf Dmat.dat [skyf]\n",
404	greg	2.24	progname);
405			return(1);
406	greg	2.1	}