src/px/ra_bmp.c

#ifndef lint
static const char RCSid[] = "$Id: ra_bmp.c,v 2.9 2004/09/23 18:00:54 greg Exp $";
#endif
/*
 *  program to convert between RADIANCE and Windows BMP file
 */

#include  <stdio.h>
#include  <math.h>
#include  <string.h>

#include  "platform.h"
#include  "color.h"
#include  "tonemap.h"
#include  "resolu.h"
#include  "bmpfile.h"

int             bradj = 0;              /* brightness adjustment */

double          gamcor = 2.2;           /* gamma correction value */

char            *progname;

static void quiterr(const char *err);
static void tmap2bmp(char *fnin, char *fnout, char *expec,
                                RGBPRIMP monpri, double gamval);
static void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri);
static void bmp2rad(BMPReader *brd, FILE *rfp, int inv);

static RGBPRIMP rgbinp = stdprims;      /* RGB input primitives */
static RGBPRIMS myinprims;              /* custom primitives holder */

static gethfunc headline;


int
main(int argc, char *argv[])
{
        char            *inpfile=NULL, *outfile=NULL;
        char            *expec = NULL;
        int             reverse = 0;
        RGBPRIMP        rgbp = stdprims;
        RGBPRIMS        myprims;
        RESOLU          rs;
        int             i;
        
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-' && argv[i][1])
                        switch (argv[i][1]) {
                        case 'b':
                                rgbp = NULL;
                                break;
                        case 'g':
                                gamcor = atof(argv[++i]);
                                break;
                        case 'e':
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        expec = argv[++i];
                                else
                                        bradj = atoi(argv[++i]);
                                break;
                        case 'p':
                                if (argc-i < 9)
                                        goto userr;
                                myprims[RED][CIEX] = atof(argv[++i]);
                                myprims[RED][CIEY] = atof(argv[++i]);
                                myprims[GRN][CIEX] = atof(argv[++i]);
                                myprims[GRN][CIEY] = atof(argv[++i]);
                                myprims[BLU][CIEX] = atof(argv[++i]);
                                myprims[BLU][CIEY] = atof(argv[++i]);
                                myprims[WHT][CIEX] = atof(argv[++i]);
                                myprims[WHT][CIEY] = atof(argv[++i]);
                                if (rgbp == stdprims)
                                        rgbp = myprims;
                                break;
                        case 'r':
                                reverse = !reverse;
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (i < argc-2)
                goto userr;

        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        SET_DEFAULT_BINARY();

        if (i <= argc-1 && strcmp(argv[i], "-"))
                inpfile = argv[i];

        if (i == argc-2 && strcmp(argv[i+1], "-"))
                outfile = argv[i+1];
                                        /* check for tone-mapping */
        if (expec != NULL) {
                if (reverse)
                        goto userr;
                tmap2bmp(inpfile, outfile, expec, rgbp, gamcor);
                return(0);
        }

        setcolrgam(gamcor);             /* set up conversion */

        if (reverse) {
                BMPReader       *rdr;
                                        /* open BMP file or stream */
                if (inpfile != NULL)
                        rdr = BMPopenInputFile(inpfile);
                else
                        rdr = BMPopenInputStream(stdin);
                        
                if (rdr == NULL) {
                        fprintf(stderr, "%s: cannot open or recognize BMP\n",
                                inpfile != NULL ? inpfile : "<stdin>");
                        exit(1);
                }
                                        /* open Radiance output */
                if (outfile != NULL && freopen(outfile, "w", stdout) == NULL) {
                        fprintf(stderr, "%s: cannot open for output\n",
                                        outfile);
                        exit(1);
                }
                                        /* put Radiance header */
                newheader("RADIANCE", stdout);
                printargs(i, argv, stdout);
                fputformat(COLRFMT, stdout);
                putchar('\n');
                rs.xr = rdr->hdr->width;
                rs.yr = rdr->hdr->height;
                rs.rt = YMAJOR;
                                        /* write scans downward if we can */
                if (rdr->hdr->yIsDown || inpfile != NULL)
                        rs.rt |= YDECR;
                fputsresolu(&rs, stdout);
                                        /* convert file */
                bmp2rad(rdr, stdout, !rdr->hdr->yIsDown && inpfile!=NULL);
                                        /* flush output */
                BMPcloseInput(rdr);
                if (fflush(stdout) < 0)
                        quiterr("error writing Radiance output");
        } else {
                BMPHeader       *hdr;
                BMPWriter       *wtr;
                                        /* open Radiance input */
                if (inpfile != NULL && freopen(inpfile, "r", stdin) == NULL) {
                        fprintf(stderr, "%s: cannot open input file\n",
                                        inpfile);
                        exit(1);
                }
                                        /* get header info. */
                if (getheader(stdin, headline, NULL) < 0 ||
                                !fgetsresolu(&rs, stdin))
                        quiterr("bad Radiance picture format");
                                        /* initialize BMP header */
                if (rgbp == NULL) {
                        hdr = BMPmappedHeader(scanlen(&rs),
                                                numscans(&rs), 0, 256);
                        /*
                        if (outfile != NULL)
                                hdr->compr = BI_RLE8;
                        */
                } else
                        hdr = BMPtruecolorHeader(scanlen(&rs),
                                                numscans(&rs), 0);
                if (hdr == NULL)
                        quiterr("cannot initialize BMP header");
                                        /* set up output direction */
                hdr->yIsDown = ((outfile == NULL) | (hdr->compr == BI_RLE8));
                                        /* open BMP output */
                if (outfile != NULL)
                        wtr = BMPopenOutputFile(outfile, hdr);
                else
                        wtr = BMPopenOutputStream(stdout, hdr);
                if (wtr == NULL)
                        quiterr("cannot allocate writer structure");
                                        /* convert file */
                rad2bmp(stdin, wtr, !hdr->yIsDown, rgbp);
                                        /* flush output */
                if (fflush((FILE *)wtr->c_data) < 0)
                        quiterr("error writing BMP output");
                BMPcloseOutput(wtr);
        }
        return(0);                      /* success */
userr:
        fprintf(stderr,
"Usage: %s [-b][-g gamma][-e spec][-p xr yr xg yg xb yb xw yw] [input|- [output]]\n",
                        progname);
        fprintf(stderr,
                "   or: %s -r [-g gamma][-e +/-stops] [input|- [output]]\n",
                        progname);
        return(1);
}

/* print message and exit */
static void
quiterr(const char *err)
{
        if (err != NULL) {
                fprintf(stderr, "%s: %s\n", progname, err);
                exit(1);
        }
        exit(0);
}

/* process header line (don't echo) */
static int
headline(char *s, void *p)
{
        char    fmt[32];

        if (formatval(fmt, s)) {        /* check if format string */
                if (!strcmp(fmt,COLRFMT))
                        return(0);
                if (!strcmp(fmt,CIEFMT)) {
                        rgbinp = TM_XYZPRIM;
                        return(0);
                }
                return(-1);
        }
        if (isprims(s)) {               /* get input primaries */
                primsval(myinprims, s);
                rgbinp = myinprims;
                return(0);
        }
                                        /* should I grok colcorr also? */
        return(0);
}


/* convert Radiance picture to BMP */
static void
rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri)
{
        int     usexfm = 0;
        COLORMAT        xfm;
        COLR    *scanin;
        COLOR   cval;
        int     y, yend, ystp;
        int     x;
                                                /* allocate scanline */
        scanin = (COLR *)malloc(bwr->hdr->width*sizeof(COLR));
        if (scanin == NULL)
                quiterr("out of memory in rad2bmp");
                                                /* set up color conversion */
        usexfm = (monpri != NULL ? rgbinp != monpri :
                        rgbinp != TM_XYZPRIM && rgbinp != stdprims);
        if (usexfm) {
                double  expcomp = pow(2.0, (double)bradj);
                if (rgbinp == TM_XYZPRIM)
                        compxyz2rgbWBmat(xfm, monpri);
                else
                        comprgb2rgbWBmat(xfm, rgbinp, monpri);
                for (y = 0; y < 3; y++)
                        for (x = 0; x < 3; x++)
                                xfm[y][x] *= expcomp;
        }
                                                /* convert image */
        if (inv) {
                y = bwr->hdr->height - 1;
                ystp = -1; yend = -1;
        } else {
                y = 0;
                ystp = 1; yend = bwr->hdr->height;
        }
                                                /* convert each scanline */
        for ( ; y != yend; y += ystp) {
                if (freadcolrs(scanin, bwr->hdr->width, rfp) < 0)
                        quiterr("error reading Radiance picture");
                if (usexfm)
                        for (x = bwr->hdr->width; x--; ) {
                                colr_color(cval, scanin[x]);
                                colortrans(cval, xfm, cval);
                                setcolr(scanin[x], colval(cval,RED),
                                                colval(cval,GRN),
                                                colval(cval,BLU));
                        }
                else if (bradj)
                        shiftcolrs(scanin, bwr->hdr->width, bradj);
                if (monpri == NULL && rgbinp != TM_XYZPRIM)
                        for (x = bwr->hdr->width; x--; )
                                scanin[x][GRN] = normbright(scanin[x]);
                colrs_gambs(scanin, bwr->hdr->width);
                if (monpri == NULL)
                        for (x = bwr->hdr->width; x--; )
                                bwr->scanline[x] = scanin[x][GRN];
                else
                        for (x = bwr->hdr->width; x--; ) {
                                bwr->scanline[3*x] = scanin[x][BLU];
                                bwr->scanline[3*x+1] = scanin[x][GRN];
                                bwr->scanline[3*x+2] = scanin[x][RED];
                        }
                bwr->yscan = y;
                x = BMPwriteScanline(bwr);
                if (x != BIR_OK)
                        quiterr(BMPerrorMessage(x));
        }
                                                /* free scanline */
        free((void *)scanin);
}

/* convert BMP file to Radiance */
static void
bmp2rad(BMPReader *brd, FILE *rfp, int inv)
{
        COLR    *scanout;
        int     y, yend, ystp;
        int     x;
                                                /* allocate scanline */
        scanout = (COLR *)malloc(brd->hdr->width*sizeof(COLR));
        if (scanout == NULL)
                quiterr("out of memory in bmp2rad");
                                                /* convert image */
        if (inv) {
                y = brd->hdr->height - 1;
                ystp = -1; yend = -1;
        } else {
                y = 0;
                ystp = 1; yend = brd->hdr->height;
        }
                                                /* convert each scanline */
        for ( ; y != yend; y += ystp) {
                x = BMPseekScanline(y, brd);
                if (x != BIR_OK)
                        quiterr(BMPerrorMessage(x));
                for (x = brd->hdr->width; x--; ) {
                        RGBquad         rgbq = BMPdecodePixel(x, brd);
                        scanout[x][RED] = rgbq.r;
                        scanout[x][GRN] = rgbq.g;
                        scanout[x][BLU] = rgbq.b;
                }
                gambs_colrs(scanout, brd->hdr->width);
                if (bradj)
                        shiftcolrs(scanout, brd->hdr->width, bradj);
                if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0)
                        quiterr("error writing Radiance picture");
        }
                                                /* clean up */
        free((void *)scanout);
}

/* Tone-map and convert Radiance picture */
static void
tmap2bmp(char *fnin, char *fnout, char *expec, RGBPRIMP monpri, double gamval)
{
        int             tmflags;
        BMPHeader       *hdr;
        BMPWriter       *wtr;
        FILE            *fp;
        int             xr, yr;
        BYTE            *pa;
        int             i;
                                        /* check tone-mapping spec */
        i = strlen(expec);
        if (i && !strncmp(expec, "auto", i))
                tmflags = TM_F_CAMERA;
        else if (i && !strncmp(expec, "human", i))
                tmflags = TM_F_HUMAN & ~TM_F_UNIMPL;
        else if (i && !strncmp(expec, "linear", i))
                tmflags = TM_F_LINEAR;
        else
                quiterr("illegal exposure specification (auto|human|linear)");
        if (monpri == NULL) {
                tmflags |= TM_F_BW;
                monpri = stdprims;
        }
                                        /* open Radiance input */
        if (fnin == NULL)
                fp = stdin;
        else if ((fp = fopen(fnin, "r")) == NULL) {
                fprintf(stderr, "%s: cannot open\n", fnin);
                exit(1);
        }
                                        /* tone-map picture */
        if (tmMapPicture(&pa, &xr, &yr, tmflags, monpri, gamval,
                        0., 0., fnin, fp) != TM_E_OK)
                exit(1);
                                        /* initialize BMP header */
        if (tmflags & TM_F_BW) {
                hdr = BMPmappedHeader(xr, yr, 0, 256);
                if (fnout != NULL)
                        hdr->compr = BI_RLE8;
        } else
                hdr = BMPtruecolorHeader(xr, yr, 0);
        if (hdr == NULL)
                quiterr("cannot initialize BMP header");
                                        /* open BMP output */
        if (fnout != NULL)
                wtr = BMPopenOutputFile(fnout, hdr);
        else
                wtr = BMPopenOutputStream(stdout, hdr);
        if (wtr == NULL)
                quiterr("cannot allocate writer structure");
                                        /* write to BMP file */
        while (wtr->yscan < yr) {
                BYTE    *scn = pa + xr*((tmflags & TM_F_BW) ? 1 : 3)*
                                                (yr-1 - wtr->yscan);
                if (tmflags & TM_F_BW)
                        memcpy((void *)wtr->scanline, (void *)scn, xr);
                else
                        for (i = xr; i--; ) {
                                wtr->scanline[3*i] = scn[3*i+BLU];
                                wtr->scanline[3*i+1] = scn[3*i+GRN];
                                wtr->scanline[3*i+2] = scn[3*i+RED];
                        }
                if ((i = BMPwriteScanline(wtr)) != BIR_OK)
                        quiterr(BMPerrorMessage(i));
        }
                                        /* flush output */
        if (fflush((FILE *)wtr->c_data) < 0)
                quiterr("error writing BMP output");
                                        /* clean up */
        if (fnin != NULL)
                fclose(fp);
        free((void *)pa);
        BMPcloseOutput(wtr);
}
Revision:	2.10
Committed:	Mon Oct 4 17:44:22 2004 UTC (19 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9
Changes since 2.9:	+3 -1 lines
Log Message:	Altered ra_bmp so it doesn't reverse scanline order on grayscale output
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.10	static const char RCSid[] = "$Id: ra_bmp.c,v 2.9 2004/09/23 18:00:54 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* program to convert between RADIANCE and Windows BMP file
6			*/
7
8			#include <stdio.h>
9	greg	2.9	#include <math.h>
10	schorsch	2.3	#include <string.h>
11
12	greg	2.1	#include "platform.h"
13			#include "color.h"
14	greg	2.4	#include "tonemap.h"
15	greg	2.1	#include "resolu.h"
16			#include "bmpfile.h"
17
18	greg	2.9	int bradj = 0; /* brightness adjustment */
19	greg	2.1
20	greg	2.9	double gamcor = 2.2; /* gamma correction value */
21	greg	2.1
22	greg	2.9	char *progname;
23	greg	2.1
24	greg	2.4	static void quiterr(const char *err);
25			static void tmap2bmp(char fnin, char fnout, char *expec,
26			RGBPRIMP monpri, double gamval);
27	greg	2.9	static void rad2bmp(FILE rfp, BMPWriter bwr, int inv, RGBPRIMP monpri);
28	schorsch	2.3	static void bmp2rad(BMPReader brd, FILE rfp, int inv);
29	greg	2.1
30	greg	2.9	static RGBPRIMP rgbinp = stdprims; /* RGB input primitives */
31			static RGBPRIMS myinprims; /* custom primitives holder */
32
33			static gethfunc headline;
34
35	greg	2.1
36			int
37			main(int argc, char *argv[])
38			{
39	greg	2.4	char inpfile=NULL, outfile=NULL;
40			char *expec = NULL;
41			int reverse = 0;
42			RGBPRIMP rgbp = stdprims;
43			RGBPRIMS myprims;
44			RESOLU rs;
45			int i;
46	greg	2.1
47			progname = argv[0];
48
49			for (i = 1; i < argc; i++)
50	greg	2.6	if (argv[i][0] == '-' && argv[i][1])
51	greg	2.1	switch (argv[i][1]) {
52			case 'b':
53	greg	2.4	rgbp = NULL;
54	greg	2.1	break;
55			case 'g':
56			gamcor = atof(argv[++i]);
57			break;
58			case 'e':
59			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
60	greg	2.4	expec = argv[++i];
61			else
62			bradj = atoi(argv[++i]);
63			break;
64			case 'p':
65			if (argc-i < 9)
66	greg	2.1	goto userr;
67	greg	2.4	myprims[RED][CIEX] = atof(argv[++i]);
68			myprims[RED][CIEY] = atof(argv[++i]);
69			myprims[GRN][CIEX] = atof(argv[++i]);
70			myprims[GRN][CIEY] = atof(argv[++i]);
71			myprims[BLU][CIEX] = atof(argv[++i]);
72			myprims[BLU][CIEY] = atof(argv[++i]);
73			myprims[WHT][CIEX] = atof(argv[++i]);
74			myprims[WHT][CIEY] = atof(argv[++i]);
75			if (rgbp == stdprims)
76			rgbp = myprims;
77	greg	2.1	break;
78			case 'r':
79			reverse = !reverse;
80			break;
81			default:
82			goto userr;
83			}
84			else
85			break;
86
87			if (i < argc-2)
88			goto userr;
89
90			SET_FILE_BINARY(stdin);
91			SET_FILE_BINARY(stdout);
92			SET_DEFAULT_BINARY();
93
94			if (i <= argc-1 && strcmp(argv[i], "-"))
95			inpfile = argv[i];
96
97			if (i == argc-2 && strcmp(argv[i+1], "-"))
98			outfile = argv[i+1];
99	greg	2.4	/* check for tone-mapping */
100			if (expec != NULL) {
101			if (reverse)
102			goto userr;
103			tmap2bmp(inpfile, outfile, expec, rgbp, gamcor);
104			return(0);
105			}
106	greg	2.1
107			setcolrgam(gamcor); /* set up conversion */
108
109			if (reverse) {
110			BMPReader *rdr;
111			/* open BMP file or stream */
112			if (inpfile != NULL)
113			rdr = BMPopenInputFile(inpfile);
114			else
115			rdr = BMPopenInputStream(stdin);
116
117			if (rdr == NULL) {
118			fprintf(stderr, "%s: cannot open or recognize BMP\n",
119			inpfile != NULL ? inpfile : "<stdin>");
120			exit(1);
121			}
122			/* open Radiance output */
123			if (outfile != NULL && freopen(outfile, "w", stdout) == NULL) {
124			fprintf(stderr, "%s: cannot open for output\n",
125			outfile);
126			exit(1);
127			}
128			/* put Radiance header */
129			newheader("RADIANCE", stdout);
130			printargs(i, argv, stdout);
131			fputformat(COLRFMT, stdout);
132			putchar('\n');
133			rs.xr = rdr->hdr->width;
134			rs.yr = rdr->hdr->height;
135			rs.rt = YMAJOR;
136	greg	2.2	/* write scans downward if we can */
137	greg	2.1	if (rdr->hdr->yIsDown \|\| inpfile != NULL)
138			rs.rt \|= YDECR;
139			fputsresolu(&rs, stdout);
140			/* convert file */
141			bmp2rad(rdr, stdout, !rdr->hdr->yIsDown && inpfile!=NULL);
142			/* flush output */
143	greg	2.2	BMPcloseInput(rdr);
144	greg	2.1	if (fflush(stdout) < 0)
145			quiterr("error writing Radiance output");
146			} else {
147			BMPHeader *hdr;
148			BMPWriter *wtr;
149			/* open Radiance input */
150			if (inpfile != NULL && freopen(inpfile, "r", stdin) == NULL) {
151			fprintf(stderr, "%s: cannot open input file\n",
152			inpfile);
153			exit(1);
154			}
155			/* get header info. */
156	greg	2.9	if (getheader(stdin, headline, NULL) < 0 \|\|
157	greg	2.1	!fgetsresolu(&rs, stdin))
158			quiterr("bad Radiance picture format");
159			/* initialize BMP header */
160	greg	2.4	if (rgbp == NULL) {
161			hdr = BMPmappedHeader(scanlen(&rs),
162			numscans(&rs), 0, 256);
163	greg	2.10	/*
164	greg	2.2	if (outfile != NULL)
165			hdr->compr = BI_RLE8;
166	greg	2.10	*/
167	greg	2.2	} else
168	greg	2.4	hdr = BMPtruecolorHeader(scanlen(&rs),
169			numscans(&rs), 0);
170	greg	2.1	if (hdr == NULL)
171			quiterr("cannot initialize BMP header");
172	greg	2.2	/* set up output direction */
173	greg	2.7	hdr->yIsDown = ((outfile == NULL) \| (hdr->compr == BI_RLE8));
174	greg	2.1	/* open BMP output */
175			if (outfile != NULL)
176			wtr = BMPopenOutputFile(outfile, hdr);
177			else
178			wtr = BMPopenOutputStream(stdout, hdr);
179	greg	2.2	if (wtr == NULL)
180			quiterr("cannot allocate writer structure");
181	greg	2.1	/* convert file */
182	greg	2.9	rad2bmp(stdin, wtr, !hdr->yIsDown, rgbp);
183	greg	2.1	/* flush output */
184			if (fflush((FILE *)wtr->c_data) < 0)
185			quiterr("error writing BMP output");
186	greg	2.2	BMPcloseOutput(wtr);
187	greg	2.1	}
188	greg	2.4	return(0); /* success */
189	greg	2.1	userr:
190			fprintf(stderr,
191	greg	2.4	"Usage: %s [-b][-g gamma][-e spec][-p xr yr xg yg xb yb xw yw] [input\|- [output]]\n",
192	greg	2.1	progname);
193	greg	2.4	fprintf(stderr,
194			" or: %s -r [-g gamma][-e +/-stops] [input\|- [output]]\n",
195			progname);
196			return(1);
197	greg	2.1	}
198
199			/* print message and exit */
200	schorsch	2.3	static void
201	greg	2.1	quiterr(const char *err)
202			{
203			if (err != NULL) {
204			fprintf(stderr, "%s: %s\n", progname, err);
205			exit(1);
206			}
207			exit(0);
208			}
209
210	greg	2.9	/* process header line (don't echo) */
211			static int
212			headline(char s, void p)
213			{
214			char fmt[32];
215
216			if (formatval(fmt, s)) { /* check if format string */
217			if (!strcmp(fmt,COLRFMT))
218			return(0);
219			if (!strcmp(fmt,CIEFMT)) {
220			rgbinp = TM_XYZPRIM;
221			return(0);
222			}
223			return(-1);
224			}
225			if (isprims(s)) { /* get input primaries */
226			primsval(myinprims, s);
227			rgbinp = myinprims;
228			return(0);
229			}
230			/* should I grok colcorr also? */
231			return(0);
232			}
233
234
235	greg	2.1	/* convert Radiance picture to BMP */
236	schorsch	2.3	static void
237	greg	2.9	rad2bmp(FILE rfp, BMPWriter bwr, int inv, RGBPRIMP monpri)
238	greg	2.1	{
239	greg	2.9	int usexfm = 0;
240			COLORMAT xfm;
241	greg	2.1	COLR *scanin;
242	greg	2.9	COLOR cval;
243	greg	2.1	int y, yend, ystp;
244			int x;
245			/* allocate scanline */
246			scanin = (COLR )malloc(bwr->hdr->widthsizeof(COLR));
247			if (scanin == NULL)
248			quiterr("out of memory in rad2bmp");
249	greg	2.9	/* set up color conversion */
250			usexfm = (monpri != NULL ? rgbinp != monpri :
251			rgbinp != TM_XYZPRIM && rgbinp != stdprims);
252			if (usexfm) {
253			double expcomp = pow(2.0, (double)bradj);
254			if (rgbinp == TM_XYZPRIM)
255			compxyz2rgbWBmat(xfm, monpri);
256			else
257			comprgb2rgbWBmat(xfm, rgbinp, monpri);
258			for (y = 0; y < 3; y++)
259			for (x = 0; x < 3; x++)
260			xfm[y][x] *= expcomp;
261			}
262	greg	2.1	/* convert image */
263			if (inv) {
264			y = bwr->hdr->height - 1;
265			ystp = -1; yend = -1;
266			} else {
267			y = 0;
268			ystp = 1; yend = bwr->hdr->height;
269			}
270			/* convert each scanline */
271			for ( ; y != yend; y += ystp) {
272			if (freadcolrs(scanin, bwr->hdr->width, rfp) < 0)
273			quiterr("error reading Radiance picture");
274	greg	2.9	if (usexfm)
275			for (x = bwr->hdr->width; x--; ) {
276			colr_color(cval, scanin[x]);
277			colortrans(cval, xfm, cval);
278			setcolr(scanin[x], colval(cval,RED),
279			colval(cval,GRN),
280			colval(cval,BLU));
281			}
282			else if (bradj)
283	greg	2.1	shiftcolrs(scanin, bwr->hdr->width, bradj);
284	greg	2.9	if (monpri == NULL && rgbinp != TM_XYZPRIM)
285			for (x = bwr->hdr->width; x--; )
286			scanin[x][GRN] = normbright(scanin[x]);
287	greg	2.1	colrs_gambs(scanin, bwr->hdr->width);
288	greg	2.9	if (monpri == NULL)
289	greg	2.1	for (x = bwr->hdr->width; x--; )
290			bwr->scanline[x] = scanin[x][GRN];
291			else
292			for (x = bwr->hdr->width; x--; ) {
293			bwr->scanline[3*x] = scanin[x][BLU];
294			bwr->scanline[3*x+1] = scanin[x][GRN];
295			bwr->scanline[3*x+2] = scanin[x][RED];
296			}
297			bwr->yscan = y;
298			x = BMPwriteScanline(bwr);
299			if (x != BIR_OK)
300			quiterr(BMPerrorMessage(x));
301			}
302			/* free scanline */
303			free((void *)scanin);
304			}
305
306			/* convert BMP file to Radiance */
307	schorsch	2.3	static void
308	greg	2.1	bmp2rad(BMPReader brd, FILE rfp, int inv)
309			{
310			COLR *scanout;
311			int y, yend, ystp;
312			int x;
313			/* allocate scanline */
314			scanout = (COLR )malloc(brd->hdr->widthsizeof(COLR));
315			if (scanout == NULL)
316			quiterr("out of memory in bmp2rad");
317			/* convert image */
318			if (inv) {
319			y = brd->hdr->height - 1;
320			ystp = -1; yend = -1;
321			} else {
322			y = 0;
323			ystp = 1; yend = brd->hdr->height;
324			}
325			/* convert each scanline */
326			for ( ; y != yend; y += ystp) {
327			x = BMPseekScanline(y, brd);
328			if (x != BIR_OK)
329			quiterr(BMPerrorMessage(x));
330			for (x = brd->hdr->width; x--; ) {
331			RGBquad rgbq = BMPdecodePixel(x, brd);
332			scanout[x][RED] = rgbq.r;
333			scanout[x][GRN] = rgbq.g;
334			scanout[x][BLU] = rgbq.b;
335			}
336			gambs_colrs(scanout, brd->hdr->width);
337			if (bradj)
338			shiftcolrs(scanout, brd->hdr->width, bradj);
339			if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0)
340			quiterr("error writing Radiance picture");
341			}
342			/* clean up */
343			free((void *)scanout);
344			}
345	greg	2.4
346			/* Tone-map and convert Radiance picture */
347			static void
348			tmap2bmp(char fnin, char fnout, char *expec, RGBPRIMP monpri, double gamval)
349			{
350			int tmflags;
351			BMPHeader *hdr;
352			BMPWriter *wtr;
353			FILE *fp;
354			int xr, yr;
355			BYTE *pa;
356			int i;
357			/* check tone-mapping spec */
358			i = strlen(expec);
359			if (i && !strncmp(expec, "auto", i))
360			tmflags = TM_F_CAMERA;
361			else if (i && !strncmp(expec, "human", i))
362			tmflags = TM_F_HUMAN & ~TM_F_UNIMPL;
363			else if (i && !strncmp(expec, "linear", i))
364			tmflags = TM_F_LINEAR;
365			else
366			quiterr("illegal exposure specification (auto\|human\|linear)");
367			if (monpri == NULL) {
368			tmflags \|= TM_F_BW;
369			monpri = stdprims;
370			}
371			/* open Radiance input */
372			if (fnin == NULL)
373			fp = stdin;
374			else if ((fp = fopen(fnin, "r")) == NULL) {
375			fprintf(stderr, "%s: cannot open\n", fnin);
376			exit(1);
377			}
378			/* tone-map picture */
379			if (tmMapPicture(&pa, &xr, &yr, tmflags, monpri, gamval,
380			0., 0., fnin, fp) != TM_E_OK)
381			exit(1);
382			/* initialize BMP header */
383			if (tmflags & TM_F_BW) {
384			hdr = BMPmappedHeader(xr, yr, 0, 256);
385	greg	2.5	if (fnout != NULL)
386			hdr->compr = BI_RLE8;
387	greg	2.4	} else
388			hdr = BMPtruecolorHeader(xr, yr, 0);
389			if (hdr == NULL)
390			quiterr("cannot initialize BMP header");
391			/* open BMP output */
392			if (fnout != NULL)
393			wtr = BMPopenOutputFile(fnout, hdr);
394			else
395			wtr = BMPopenOutputStream(stdout, hdr);
396			if (wtr == NULL)
397			quiterr("cannot allocate writer structure");
398			/* write to BMP file */
399			while (wtr->yscan < yr) {
400			BYTE scn = pa + xr((tmflags & TM_F_BW) ? 1 : 3)*
401	greg	2.7	(yr-1 - wtr->yscan);
402	greg	2.4	if (tmflags & TM_F_BW)
403			memcpy((void )wtr->scanline, (void )scn, xr);
404			else
405			for (i = xr; i--; ) {
406			wtr->scanline[3i] = scn[3i+BLU];
407			wtr->scanline[3i+1] = scn[3i+GRN];
408			wtr->scanline[3i+2] = scn[3i+RED];
409			}
410			if ((i = BMPwriteScanline(wtr)) != BIR_OK)
411			quiterr(BMPerrorMessage(i));
412			}
413			/* flush output */
414			if (fflush((FILE *)wtr->c_data) < 0)
415			quiterr("error writing BMP output");
416			/* clean up */
417	greg	2.8	if (fnin != NULL)
418			fclose(fp);
419	greg	2.4	free((void *)pa);
420			BMPcloseOutput(wtr);
421			}