src/util/dcglare.c

/*
 * Compute time-step glare using imageless DGP calculation method.
 *
 *      N. Jones
 */

/*
 * Copyright (c) 2017-2019 Nathaniel Jones
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <ctype.h>
#include "platform.h"
#include "standard.h"
#include "cmatrix.h"
#include "resolu.h"
#include "cmglare.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);
                }
                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);
}

/* 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;
        CMATRIX         *cmtx;          /* component vector/matrix result */
        char            fnbuf[256];
        int             a, i;
#ifdef DC_GLARE
        char    *direct_path = NULL;
        char    *schedule_path = NULL;
        int             *occupancy = NULL;
        int             start_hour = 0;
        int             end_hour = 24;
        double  dgp_limit = -1;
        double  dgp_threshold = 2000;
        char    *view_path = NULL;
        FILE    *fp;
        float   *dgp_values = NULL;
        FVECT   vdir, vup;
        FVECT   *views = NULL;
        int             viewfmt = DTascii;

        vdir[0] = vdir[1] = vdir[2] = vup[0] = vup[1] = 0;
        vup[2] = 1;

        clock_t timer = clock();
#endif /* DC_GLARE */

        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]) {
#ifndef DC_GLARE
                        case '\0':      /* output specification (not format) */
                                ofspec = argv[++a];
                                break;
#endif /* DC_GLARE */
                        case 'f':
                                outfmt = DTfloat;
                                break;
                        case 'd':
                                outfmt = DTdouble;
                                break;
                        case 'a':
                                outfmt = DTascii;
                                break;
                        default:
                                goto userr;
                        }
                        break;
#ifdef DC_GLARE
                case 's':
                        switch (argv[a][2]) {
                        case 'f':       /* occupancy schedule file */
                                schedule_path = argv[++a];
                                break;
                        case 's':       /* occupancy start hour */
                                start_hour = atoi(argv[++a]);
                                break;
                        case 'e':       /* occupancy end hour */
                                end_hour = atoi(argv[++a]);
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'l':       /* perceptible glare threshold */
                        dgp_limit = atof(argv[++a]);
                        break;
                case 'b':       /* luminance threshold */
                        dgp_threshold = atof(argv[++a]);
                        break;
                case 'v':
                        switch (argv[a][2]) {
                        case 'd':       /* forward */
                                //check(3, "fff");
                                vdir[0] = atof(argv[++a]);
                                vdir[1] = atof(argv[++a]);
                                vdir[2] = atof(argv[++a]);
                                if (normalize(vdir) == 0.0) goto userr;
                                break;
                        case 'u':       /* up */
                                //check(3, "fff");
                                vup[0] = atof(argv[++a]);
                                vup[1] = atof(argv[++a]);
                                vup[2] = atof(argv[++a]);
                                if (normalize(vup) == 0.0) goto userr;
                                break;
                        case 'f':       /* view directions file */
                                //check(2, "s");
                                view_path = argv[++a];
                                break;
                        case 'i':
                                switch (argv[a][3]) {
                                case 'f':
                                        viewfmt = DTfloat;
                                        break;
                                case 'd':
                                        viewfmt = DTdouble;
                                        break;
                                case 'a':
                                        viewfmt = DTascii;
                                        break;
                                default:
                                        goto userr;
                                }
                        default:
                                goto userr;
                        }
                        break;
#endif /* DC_GLARE */
                default:
                        goto userr;
                }
#ifdef DC_GLARE
        if ((argc-a < 2) | (argc-a > 5))
                goto userr;
        /* single bounce daylight coefficients file */
        direct_path = argv[a++];
#else
        if ((argc-a < 1) | (argc-a > 4))
                goto userr;
#endif /* DC_GLARE */

        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 */
                //TIMER(timer, "read args");
                cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
                nsteps = cmtx->ncols;
                //TIMER(timer, "load sky matrix");
        }
                                                /* 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 (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);
                //TIMER(timer, "load view matrix");
                CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
                //TIMER(timer, "multiply");
                cm_free(Vmat);
#ifdef DC_GLARE
                if (direct_path) { /* Do glare autonomy calculation */
                        /* Load occupancy schedule */
                        occupancy = (int*)malloc(nsteps * sizeof(int));
                        if (!occupancy) {
                                fprintf(stderr,
                                        "%s: out of memory for schedule\n",
                                        progname);
                                return(1);
                        }
                        if (schedule_path) {
                                if ((fp = fopen(schedule_path, "r")) == NULL) {
                                        fprintf(stderr,
                                                "%s: cannot open input file \"%s\"\n",
                                                progname, schedule_path);
                                        return(1);
                                }
                                if (cm_load_schedule(nsteps, occupancy, fp) < 0) return(1);
                        }
                        else {
                                for (i = 0; i < nsteps; i++) {
                                        /* Assume hourly spacing */
                                        int hour = i % 24;
                                        occupancy[i] = ((hour >= start_hour) & (hour < end_hour));
                                }
                        }
                        //TIMER(timer, "load occupancy schedule");

                        /* Load view directions */
                        if (view_path == NULL) {
                                if (vdir[0] == 0.0f && vdir[1] == 0.0f && vdir[2] == 0.0f) {
                                        fprintf(stderr,
                                                "%s: missing view direction\n",
                                                progname);
                                        return(1);
                                }
                        }
                        else {
                                if ((fp = fopen(view_path, "r")) == NULL) {
                                        fprintf(stderr,
                                                "%s: cannot open input file \"%s\"\n",
                                                progname, view_path);
                                        return(1);
                                }
                                if (viewfmt != DTascii)
                                        SET_FILE_BINARY(fp);
                                views = cm_load_views(rmtx->nrows, viewfmt, fp);
                                if (!views) return(1);
                                //TIMER(timer, "load views");
                        }

                        /* Calculate glare values */
                        Vmat = cm_load(direct_path, 0, cmtx->nrows, DTfromHeader);
                        //TIMER(timer, "load direct matrix");
                        dgp_values = cm_glare(Vmat, rmtx, cmtx, occupancy, dgp_limit, dgp_threshold, views, vdir, vup);
                        //TIMER(timer, "calculate dgp");
                        free(views);
                        cm_free(Vmat);

                        /* Check successful calculation */
                        if (!dgp_values) return(1);
                }
#endif /* DC_GLARE */
                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);
                                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);
                                        fprintf(ofp, "NROWS=%d\n", rvec->nrows);
                                        fputs("NCOLS=1\nNCOMP=3\n", ofp);
                                        if ((outfmt == 'f') | (outfmt == 'd'))
                                                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 (headout) {          /* header output */
                                newheader("RADIANCE", ofp);
                                printargs(argc, argv, ofp);
                                fputnow(ofp);
                                fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
#ifdef DC_GLARE
                                fprintf(ofp, "NCOLS=%d\n", (!dgp_values || dgp_limit < 0) ? rmtx->ncols : 1);
                                fprintf(ofp, "NCOMP=%d\n", dgp_values ? 1 : 3);
#else
                                fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
                                fputs("NCOMP=3\n", ofp);
#endif /* DC_GLARE */
                                if ((outfmt == 'f') | (outfmt == 'd'))
                                        fputendian(ofp);
                                fputformat(cm_fmt_id[outfmt], ofp);
                                fputc('\n', ofp);
                        }
#ifdef DC_GLARE
                        if (dgp_values) { /* Write glare autonomy */
                                cm_write_glare(dgp_values, rmtx->nrows, dgp_limit < 0 ? rmtx->ncols : 1, outfmt, ofp);
                                free(dgp_values);
                                //TIMER(timer, "write");
                        } 
                        else
#endif /* DC_GLARE */
                        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:
#ifdef DC_GLARE
        fprintf(stderr, "Usage: %s [-n nsteps][-i{f|d|h}][-o{f|d}][-l limit][-b threshold][{-sf occupancy|-ss start -se end}]{-vf views [-vi{f|d}]|-vd x y z}[-vu x y z] DCdirect DCtotal [skyf]\n",
                progname);
        fprintf(stderr, "   or: %s [-n nsteps][-i{f|d|h}][-o{f|d}][-l limit][-b threshold][{-sf occupancy|-ss start -se end}]{-vf views [-vi{f|d}]|-vd x y z}[-vu x y z] DCdirect Vspec Tbsdf Dmat.dat [skyf]\n",
                progname);
#else
        fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d}] DCspec [skyf]\n",
                                progname);
        fprintf(stderr, "   or: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d}] Vspec Tbsdf Dmat.dat [skyf]\n",
                                progname);
#endif /* DC_GLARE */
        return(1);
}
Revision:	2.5
Committed:	Thu Mar 3 03:55:13 2022 UTC (3 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.4:	+3 -3 lines
Log Message:	feat: Added float and double alignment to i/o routines for future mmap() use
#	User	Rev	Content
1	greg	2.1	/*
2			* Compute time-step glare using imageless DGP calculation method.
3			*
4			* N. Jones
5			*/
6
7			/*
8			* Copyright (c) 2017-2019 Nathaniel Jones
9			*
10			* Permission is hereby granted, free of charge, to any person obtaining a copy
11			* of this software and associated documentation files (the "Software"), to deal
12			* in the Software without restriction, including without limitation the rights
13			* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14			* copies of the Software, and to permit persons to whom the Software is
15			* furnished to do so, subject to the following conditions:
16			*
17			* The above copyright notice and this permission notice shall be included in all
18			* copies or substantial portions of the Software.
19			*
20			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23			* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25			* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26			* SOFTWARE.
27			*/
28
29			#include <ctype.h>
30			#include "platform.h"
31			#include "standard.h"
32			#include "cmatrix.h"
33			#include "resolu.h"
34			#include "cmglare.h"
35
36			char progname; / global argv[0] */
37
38			/* Sum together a set of images and write result to fout */
39			static int
40			sum_images(const char fspec, const CMATRIX cv, FILE *fout)
41			{
42			int myDT = DTfromHeader;
43			COLR *scanline = NULL;
44			CMATRIX *pmat = NULL;
45			int myXR=0, myYR=0;
46			int i, y;
47
48			if (cv->ncols != 1)
49			error(INTERNAL, "expected vector in sum_images()");
50			for (i = 0; i < cv->nrows; i++) {
51			const COLORV *scv = cv_lval(cv,i);
52			int flat_file = 0;
53			char fname[1024];
54			FILE *fp;
55			long data_start;
56			int dt, xr, yr;
57			COLORV *psp;
58			char *err;
59			/* check for zero */
60			if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
61			(myDT != DTfromHeader) \| (i < cv->nrows-1))
62			continue;
63			/* open next picture */
64			sprintf(fname, fspec, i);
65			if ((fp = fopen(fname, "rb")) == NULL) {
66			sprintf(errmsg, "cannot open picture '%s'", fname);
67			error(SYSTEM, errmsg);
68			}
69			dt = DTfromHeader;
70	greg	2.3	if ((err = cm_getheader(&dt, NULL, NULL, NULL, NULL, fp)) != NULL)
71	greg	2.1	error(USER, err);
72			if ((dt != DTrgbe) & (dt != DTxyze) \|\|
73			!fscnresolu(&xr, &yr, fp)) {
74			sprintf(errmsg, "file '%s' not a picture", fname);
75			error(USER, errmsg);
76			}
77			if (myDT == DTfromHeader) { /* on first one */
78			myDT = dt;
79			myXR = xr; myYR = yr;
80			scanline = (COLR )malloc(sizeof(COLR)myXR);
81			if (scanline == NULL)
82			error(SYSTEM, "out of memory in sum_images()");
83			pmat = cm_alloc(myYR, myXR);
84			memset(pmat->cmem, 0, sizeof(COLOR)myXRmyYR);
85			/* finish header */
86	greg	2.5	fputformat(cm_fmt_id[myDT], fout);
87	greg	2.1	fputc('\n', fout);
88			fflush(fout);
89			} else if ((dt != myDT) \| (xr != myXR) \| (yr != myYR)) {
90			sprintf(errmsg, "picture '%s' format/size mismatch",
91			fname);
92			error(USER, errmsg);
93			}
94			/* flat file check */
95			if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
96			flat_file = (ftell(fp) == data_start + sizeof(COLR)xryr);
97			if (fseek(fp, data_start, SEEK_SET) < 0) {
98			sprintf(errmsg, "cannot seek on picture '%s'", fname);
99			error(SYSTEM, errmsg);
100			}
101			}
102			psp = pmat->cmem;
103			for (y = 0; y < yr; y++) { /* read it in */
104			COLOR col;
105			int x;
106			if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr :
107			freadcolrs(scanline, xr, fp) < 0) {
108			sprintf(errmsg, "error reading picture '%s'",
109			fname);
110			error(SYSTEM, errmsg);
111			}
112			/* sum in scanline */
113			for (x = 0; x < xr; x++, psp += 3) {
114			if (!scanline[x][EXP])
115			continue; /* skip zeroes */
116			colr_color(col, scanline[x]);
117			multcolor(col, scv);
118			addcolor(psp, col);
119			}
120			}
121			fclose(fp); /* done this picture */
122			}
123			free(scanline);
124			i = cm_write(pmat, myDT, fout); /* write picture */
125			cm_free(pmat); /* free data */
126			return(i);
127			}
128
129			/* check to see if a string contains a %d or %o specification */
130			static int
131			hasNumberFormat(const char *s)
132			{
133			if (s == NULL)
134			return(0);
135
136			while (*s) {
137			while (*s != '%')
138			if (!*s++)
139			return(0);
140			if (++s == '%') { / ignore "%%" */
141			++s;
142			continue;
143			}
144			while (isdigit(s)) / field length */
145			++s;
146			/* field we'll use? */
147			if ((s == 'd') \| (s == 'i') \| (*s == 'o') \|
148			(s == 'x') \| (s == 'X'))
149			return(1);
150			}
151			return(0); /* didn't find one */
152			}
153
154			int
155			main(int argc, char *argv[])
156			{
157			int skyfmt = DTfromHeader;
158			int outfmt = DTascii;
159			int headout = 1;
160			int nsteps = 0;
161			char *ofspec = NULL;
162			FILE *ofp = stdout;
163			CMATRIX cmtx; / component vector/matrix result */
164			char fnbuf[256];
165			int a, i;
166			#ifdef DC_GLARE
167			char *direct_path = NULL;
168			char *schedule_path = NULL;
169			int *occupancy = NULL;
170			int start_hour = 0;
171			int end_hour = 24;
172			double dgp_limit = -1;
173			double dgp_threshold = 2000;
174			char *view_path = NULL;
175			FILE *fp;
176			float *dgp_values = NULL;
177			FVECT vdir, vup;
178			FVECT *views = NULL;
179			int viewfmt = DTascii;
180
181			vdir[0] = vdir[1] = vdir[2] = vup[0] = vup[1] = 0;
182			vup[2] = 1;
183
184			clock_t timer = clock();
185			#endif /* DC_GLARE */
186
187			progname = argv[0];
188			/* get options */
189			for (a = 1; a < argc && argv[a][0] == '-'; a++)
190			switch (argv[a][1]) {
191			case 'n':
192			nsteps = atoi(argv[++a]);
193			if (nsteps < 0)
194			goto userr;
195			skyfmt = nsteps ? DTascii : DTfromHeader;
196			break;
197			case 'h':
198			headout = !headout;
199			break;
200			case 'i':
201			switch (argv[a][2]) {
202			case 'f':
203			skyfmt = DTfloat;
204			break;
205			case 'd':
206			skyfmt = DTdouble;
207			break;
208			case 'a':
209			skyfmt = DTascii;
210			break;
211			default:
212			goto userr;
213			}
214			break;
215			case 'o':
216			switch (argv[a][2]) {
217			#ifndef DC_GLARE
218			case '\0': /* output specification (not format) */
219			ofspec = argv[++a];
220			break;
221			#endif /* DC_GLARE */
222			case 'f':
223			outfmt = DTfloat;
224			break;
225			case 'd':
226			outfmt = DTdouble;
227			break;
228			case 'a':
229			outfmt = DTascii;
230			break;
231			default:
232			goto userr;
233			}
234			break;
235			#ifdef DC_GLARE
236			case 's':
237			switch (argv[a][2]) {
238			case 'f': /* occupancy schedule file */
239			schedule_path = argv[++a];
240			break;
241			case 's': /* occupancy start hour */
242			start_hour = atoi(argv[++a]);
243			break;
244			case 'e': /* occupancy end hour */
245			end_hour = atoi(argv[++a]);
246			break;
247			default:
248			goto userr;
249			}
250			break;
251			case 'l': /* perceptible glare threshold */
252			dgp_limit = atof(argv[++a]);
253			break;
254			case 'b': /* luminance threshold */
255			dgp_threshold = atof(argv[++a]);
256			break;
257			case 'v':
258			switch (argv[a][2]) {
259			case 'd': /* forward */
260			//check(3, "fff");
261			vdir[0] = atof(argv[++a]);
262			vdir[1] = atof(argv[++a]);
263			vdir[2] = atof(argv[++a]);
264			if (normalize(vdir) == 0.0) goto userr;
265			break;
266			case 'u': /* up */
267			//check(3, "fff");
268			vup[0] = atof(argv[++a]);
269			vup[1] = atof(argv[++a]);
270			vup[2] = atof(argv[++a]);
271			if (normalize(vup) == 0.0) goto userr;
272			break;
273			case 'f': /* view directions file */
274			//check(2, "s");
275			view_path = argv[++a];
276			break;
277			case 'i':
278			switch (argv[a][3]) {
279			case 'f':
280			viewfmt = DTfloat;
281			break;
282			case 'd':
283			viewfmt = DTdouble;
284			break;
285			case 'a':
286			viewfmt = DTascii;
287			break;
288			default:
289			goto userr;
290			}
291			default:
292			goto userr;
293			}
294			break;
295			#endif /* DC_GLARE */
296			default:
297			goto userr;
298			}
299			#ifdef DC_GLARE
300			if ((argc-a < 2) \| (argc-a > 5))
301			goto userr;
302			/* single bounce daylight coefficients file */
303	greg	2.4	direct_path = argv[a++];
304	greg	2.1	#else
305			if ((argc-a < 1) \| (argc-a > 4))
306			goto userr;
307			#endif /* DC_GLARE */
308
309			if (argc-a > 2) { /* VTDs expression */
310			CMATRIX smtx, Dmat, Tmat, imtx;
311			const char *ccp;
312			/* get sky vector/matrix */
313			smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
314			nsteps = smtx->ncols;
315			/* load BSDF */
316			if (argv[a+1][0] != '!' &&
317			(ccp = strrchr(argv[a+1], '.')) != NULL &&
318			!strcasecmp(ccp+1, "XML"))
319			Tmat = cm_loadBTDF(argv[a+1]);
320			else
321			Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
322			/* load Daylight matrix */
323			Dmat = cm_load(argv[a+2], Tmat->ncols,
324			smtx->nrows, DTfromHeader);
325			/* multiply vector through */
326			imtx = cm_multiply(Dmat, smtx);
327			cm_free(Dmat); cm_free(smtx);
328			cmtx = cm_multiply(Tmat, imtx);
329			cm_free(Tmat);
330			cm_free(imtx);
331			} else { /* sky vector/matrix only */
332			//TIMER(timer, "read args");
333			cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
334			nsteps = cmtx->ncols;
335			//TIMER(timer, "load sky matrix");
336			}
337			/* prepare output stream */
338			if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
339			sprintf(fnbuf, ofspec, 1);
340			ofspec = fnbuf;
341			}
342			if (ofspec != NULL && !hasNumberFormat(ofspec)) {
343			if ((ofp = fopen(ofspec, "w")) == NULL) {
344			fprintf(stderr, "%s: cannot open '%s' for output\n",
345			progname, ofspec);
346			return(1);
347			}
348			ofspec = NULL; /* only need to open once */
349			}
350			if (hasNumberFormat(argv[a])) { /* generating image(s) */
351			if (ofspec == NULL) {
352			SET_FILE_BINARY(ofp);
353			newheader("RADIANCE", ofp);
354			printargs(argc, argv, ofp);
355			fputnow(ofp);
356			}
357			if (nsteps > 1) /* multiple output frames? */
358			for (i = 0; i < nsteps; i++) {
359			CMATRIX *cvec = cm_column(cmtx, i);
360			if (ofspec != NULL) {
361			sprintf(fnbuf, ofspec, i);
362			if ((ofp = fopen(fnbuf, "wb")) == NULL) {
363			fprintf(stderr,
364			"%s: cannot open '%s' for output\n",
365			progname, fnbuf);
366			return(1);
367			}
368			newheader("RADIANCE", ofp);
369			printargs(argc, argv, ofp);
370			fputnow(ofp);
371			}
372			fprintf(ofp, "FRAME=%d\n", i);
373			if (!sum_images(argv[a], cvec, ofp))
374			return(1);
375			if (ofspec != NULL) {
376			if (fclose(ofp) == EOF) {
377			fprintf(stderr,
378			"%s: error writing to '%s'\n",
379			progname, fnbuf);
380			return(1);
381			}
382			ofp = stdout;
383			}
384			cm_free(cvec);
385			}
386			else if (!sum_images(argv[a], cmtx, ofp))
387			return(1);
388			} else { /* generating vector/matrix */
389			CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
390			//TIMER(timer, "load view matrix");
391			CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
392			//TIMER(timer, "multiply");
393			cm_free(Vmat);
394			#ifdef DC_GLARE
395			if (direct_path) { /* Do glare autonomy calculation */
396			/* Load occupancy schedule */
397			occupancy = (int)malloc(nsteps sizeof(int));
398			if (!occupancy) {
399			fprintf(stderr,
400			"%s: out of memory for schedule\n",
401			progname);
402			return(1);
403			}
404			if (schedule_path) {
405			if ((fp = fopen(schedule_path, "r")) == NULL) {
406			fprintf(stderr,
407			"%s: cannot open input file \"%s\"\n",
408			progname, schedule_path);
409			return(1);
410			}
411			if (cm_load_schedule(nsteps, occupancy, fp) < 0) return(1);
412			}
413			else {
414			for (i = 0; i < nsteps; i++) {
415			/* Assume hourly spacing */
416			int hour = i % 24;
417			occupancy[i] = ((hour >= start_hour) & (hour < end_hour));
418			}
419			}
420			//TIMER(timer, "load occupancy schedule");
421
422			/* Load view directions */
423			if (view_path == NULL) {
424			if (vdir[0] == 0.0f && vdir[1] == 0.0f && vdir[2] == 0.0f) {
425			fprintf(stderr,
426			"%s: missing view direction\n",
427			progname);
428			return(1);
429			}
430			}
431			else {
432			if ((fp = fopen(view_path, "r")) == NULL) {
433			fprintf(stderr,
434			"%s: cannot open input file \"%s\"\n",
435			progname, view_path);
436			return(1);
437			}
438			if (viewfmt != DTascii)
439			SET_FILE_BINARY(fp);
440			views = cm_load_views(rmtx->nrows, viewfmt, fp);
441			if (!views) return(1);
442			//TIMER(timer, "load views");
443			}
444
445			/* Calculate glare values */
446			Vmat = cm_load(direct_path, 0, cmtx->nrows, DTfromHeader);
447			//TIMER(timer, "load direct matrix");
448			dgp_values = cm_glare(Vmat, rmtx, cmtx, occupancy, dgp_limit, dgp_threshold, views, vdir, vup);
449			//TIMER(timer, "calculate dgp");
450			free(views);
451			cm_free(Vmat);
452
453			/* Check successful calculation */
454			if (!dgp_values) return(1);
455			}
456			#endif /* DC_GLARE */
457			if (ofspec != NULL) { /* multiple vector files? */
458			const char *wtype = (outfmt==DTascii) ? "w" : "wb";
459			for (i = 0; i < nsteps; i++) {
460			CMATRIX *rvec = cm_column(rmtx, i);
461			sprintf(fnbuf, ofspec, i);
462			if ((ofp = fopen(fnbuf, wtype)) == NULL) {
463			fprintf(stderr,
464			"%s: cannot open '%s' for output\n",
465			progname, fnbuf);
466			return(1);
467			}
468			#ifdef getc_unlocked
469			flockfile(ofp);
470			#endif
471			if (headout) { /* header output */
472			newheader("RADIANCE", ofp);
473			printargs(argc, argv, ofp);
474			fputnow(ofp);
475			fprintf(ofp, "FRAME=%d\n", i);
476			fprintf(ofp, "NROWS=%d\n", rvec->nrows);
477			fputs("NCOLS=1\nNCOMP=3\n", ofp);
478			if ((outfmt == 'f') \| (outfmt == 'd'))
479			fputendian(ofp);
480	greg	2.5	fputformat(cm_fmt_id[outfmt], ofp);
481	greg	2.1	fputc('\n', ofp);
482			}
483			cm_write(rvec, outfmt, ofp);
484			if (fclose(ofp) == EOF) {
485			fprintf(stderr,
486			"%s: error writing to '%s'\n",
487			progname, fnbuf);
488			return(1);
489			}
490			ofp = stdout;
491			cm_free(rvec);
492			}
493			} else {
494			#ifdef getc_unlocked
495			flockfile(ofp);
496			#endif
497			if (outfmt != DTascii)
498			SET_FILE_BINARY(ofp);
499			if (headout) { /* header output */
500			newheader("RADIANCE", ofp);
501			printargs(argc, argv, ofp);
502			fputnow(ofp);
503			fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
504			#ifdef DC_GLARE
505			fprintf(ofp, "NCOLS=%d\n", (!dgp_values \|\| dgp_limit < 0) ? rmtx->ncols : 1);
506			fprintf(ofp, "NCOMP=%d\n", dgp_values ? 1 : 3);
507			#else
508			fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
509			fputs("NCOMP=3\n", ofp);
510			#endif /* DC_GLARE */
511			if ((outfmt == 'f') \| (outfmt == 'd'))
512			fputendian(ofp);
513	greg	2.5	fputformat(cm_fmt_id[outfmt], ofp);
514	greg	2.1	fputc('\n', ofp);
515			}
516			#ifdef DC_GLARE
517			if (dgp_values) { /* Write glare autonomy */
518			cm_write_glare(dgp_values, rmtx->nrows, dgp_limit < 0 ? rmtx->ncols : 1, outfmt, ofp);
519			free(dgp_values);
520			//TIMER(timer, "write");
521			}
522			else
523			#endif /* DC_GLARE */
524			cm_write(rmtx, outfmt, ofp);
525			}
526			cm_free(rmtx);
527			}
528			if (fflush(ofp) == EOF) { /* final clean-up */
529			fprintf(stderr, "%s: write error on output\n", progname);
530			return(1);
531			}
532			cm_free(cmtx);
533			return(0);
534			userr:
535			#ifdef DC_GLARE
536			fprintf(stderr, "Usage: %s [-n nsteps][-i{f\|d\|h}][-o{f\|d}][-l limit][-b threshold][{-sf occupancy\|-ss start -se end}]{-vf views [-vi{f\|d}]\|-vd x y z}[-vu x y z] DCdirect DCtotal [skyf]\n",
537			progname);
538			fprintf(stderr, " or: %s [-n nsteps][-i{f\|d\|h}][-o{f\|d}][-l limit][-b threshold][{-sf occupancy\|-ss start -se end}]{-vf views [-vi{f\|d}]\|-vd x y z}[-vu x y z] DCdirect Vspec Tbsdf Dmat.dat [skyf]\n",
539			progname);
540			#else
541			fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f\|d\|h}][-o{f\|d}] DCspec [skyf]\n",
542			progname);
543			fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f\|d\|h}][-o{f\|d}] Vspec Tbsdf Dmat.dat [skyf]\n",
544			progname);
545			#endif /* DC_GLARE */
546			return(1);
547			}