src/px/ra_xyze.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_xyze.c,v 2.15 2024/10/01 20:04:44 greg Exp $";
#endif
/*
 *  Program to convert between RADIANCE RGBE and XYZE formats
 *  Added white-balance adjustment 10/01 (GW).
 */

#include  <math.h>
#include  "paths.h"
#include  "platform.h"
#include  "color.h"
#include  "resolu.h"
#include  "rtio.h"

enum {InpUNK, InpRGB, InpXYZ, InpSPEC}; /* input format */
int  infmt = InpUNK;
int  rgbout = 0;                        /* output should be RGBE? */
RGBPRIMS  inprims = STDPRIMS;           /* input primaries */
RGBPRIMS  outprims = STDPRIMS;          /* output primaries */
double  expcomp = 1.0;                  /* exposure compensation */
int  doflat = -1;                       /* produce flat file? */
double  origexp = -1.0;                 /* original exposure */

static gethfunc headline;
static void quiterr(char *err);
static void myreadscan(COLOR *scn, int len);
static void convert(void);


static int
headline(                               /* process header line */
        char    *s,
        void    *p
)
{
        char    fmt[MAXFMTLEN];

        if (formatval(fmt, s)) {        /* check if format string */
                if (!strcmp(fmt,COLRFMT))
                        infmt = InpRGB;
                else if (!strcmp(fmt,CIEFMT))
                        infmt = InpXYZ;
                else if (!strcmp(fmt,SPECFMT))
                        infmt = InpSPEC;
                else
                        infmt = InpUNK;
                return(0);              /* don't echo */
        }
        if (origexp > 0.0 && isexpos(s)) {
                origexp *= exposval(s);
                return(0);              /* don't echo */
        }
        if (isprims(s)) {               /* get input primaries */
                primsval(inprims, s);
                return(0);              /* don't echo */
        }
        if (iswlsplit(s)) {             /* get wavelength limits */
                wlsplitval(WLPART, s);
                return(0);              /* don't echo */
        }
        if (isncomp(s)) {               /* number of color samples */
                NCSAMP = ncompval(s);
                return(0);              /* don't echo */
        }
                                        /* should I grok colcorr also? */
        return(fputs(s, stdout));
}


int
main(int  argc, char  *argv[])
{
        int  i;

        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        fixargv0(argv[0]);

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'c':               /* rle-compressed output */
                                doflat = 0;
                                break;
                        case 'u':               /* flat output */
                                doflat = 1;
                                break;
                        case 'r':               /* RGBE output */
                                rgbout = 1;
                                break;
                        case 'p':               /* RGB primaries */
                                if (i+8 >= argc)
                                        goto userr;
                                outprims[RED][CIEX] = atof(argv[++i]);
                                outprims[RED][CIEY] = atof(argv[++i]);
                                outprims[GRN][CIEX] = atof(argv[++i]);
                                outprims[GRN][CIEY] = atof(argv[++i]);
                                outprims[BLU][CIEX] = atof(argv[++i]);
                                outprims[BLU][CIEY] = atof(argv[++i]);
                                outprims[WHT][CIEX] = atof(argv[++i]);
                                outprims[WHT][CIEY] = atof(argv[++i]);
                                break;
                        case 'o':               /* original exposure */
                                origexp = 1.0;
                                break;
                        case 'e':               /* exposure compensation */
                                expcomp = atof(argv[++i]);
                                if (argv[i][0] == '+' || argv[i][0] == '-')
                                        expcomp = pow(2., expcomp);
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (doflat < 0)
                doflat = !rgbout;
        if (i < argc-2)
                goto userr;
        if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                fprintf(stderr, "%s: can't open input \"%s\"\n",
                                progname, argv[i]);
                exit(1);
        }
        if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
                fprintf(stderr, "%s: can't open output \"%s\"\n",
                                progname, argv[i+1]);
                exit(1);
        }
        getheader(stdin, headline, NULL);
        if (infmt == InpUNK)
                quiterr("unrecognized/missing input file format");
        if (infmt == InpSPEC ? (NCSAMP <= 3) | (NCSAMP > MAXCSAMP) :
                        NCSAMP != 3)
                quiterr("bad number of color components");
        printargs(argc, argv, stdout);          /* add to header */
        convert();                              /* convert picture */
        exit(0);
userr:
        fprintf(stderr, "Usage: %s [-r][-o][-e exp][-c|-u]", progname);
        fprintf(stderr, "[-p rx ry gx gy bx by wx wy] [input [output]]\n");
        exit(1);
}


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


static void
myreadscan(COLOR *scn, int len)
{
        if (infmt == InpSPEC) {         /* read & convert to XYZ */
                static COLOR    *scomp = NULL;
                SCOLR           sclr;
                SCOLOR          scol;
                COLOR           xyz;
                int             n;
                if (scomp == NULL) {    /* initialize conversion */
                        scomp = (COLOR *)malloc(sizeof(COLOR)*NCSAMP);
                        if (scomp == NULL)
                                quiterr("out of memory in myreadscan");
                        for (n = NCSAMP; n--; )
                                spec_cie(scomp[n],
                                        WLPART[0] + (WLPART[3] - WLPART[0])*(n+1)/NCSAMP,
                                        WLPART[0] + (WLPART[3] - WLPART[0])*n/NCSAMP);
                }
                while (len-- > 0) {
                        if (getbinary(sclr, LSCOLR, 1, stdin) != 1)
                                goto readerr;
                        scolr_scolor(scol, sclr);
                        setcolor(*scn, 0, 0, 0);
                        for (n = NCSAMP; n--; ) {
                                copycolor(xyz, scomp[n]);
                                scalecolor(xyz, scol[n]);
                                addcolor(*scn, xyz);
                        }
                        scn++;
                }
                return;
        }                               /* else read as RGBE/XYZE */
        if (freadscan(scn, len, stdin) >= 0)
                return;
readerr:
        quiterr("error reading input picture");
}


static void
convert(void)                           /* convert to XYZE or RGBE picture */
{
        int     order;
        int     xmax, ymax;
        COLORMAT        xfm;
        COLOR   *scanin;
        COLR    *scanout;
        double  exp2do = expcomp;
        double  exp2report = expcomp;
        int     y;
        int     x;
                                                /* recover original? */
        if (origexp > 0.0)
                exp2do /= origexp;
                                                /* compute transform */
        if (rgbout) {
                if (infmt == InpRGB) {          /* RGBE -> RGBE */
                        comprgb2rgbWBmat(xfm, inprims, outprims);
                } else {                        /* XYZE/Spectral -> RGBE */
                        compxyz2rgbWBmat(xfm, outprims);
                }
                if (infmt == InpXYZ) {
                        if (origexp > 0.0)
                                exp2do /= WHTEFFICACY;
                        else
                                exp2report *= WHTEFFICACY;
                }
        } else {
                if (infmt == InpRGB) {          /* RGBE -> XYZE */
                        comprgb2xyzWBmat(xfm, inprims);
                } else {                        /* XYZE/Spectral -> XYZE */
                        memset(xfm, 0, sizeof(xfm));
                        for (x = 3; x--; )
                                xfm[x][x] = 1.;
                }
                if (infmt != InpXYZ) {
                        if (origexp > 0)
                                exp2do *= WHTEFFICACY;
                        else
                                exp2report /= WHTEFFICACY;
                }
        }
        for (y = 0; y < 3; y++)
                for (x = 0; x < 3; x++)
                        xfm[y][x] *= exp2do;
                                                /* get input resolution */
        if ((order = fgetresolu(&xmax, &ymax, stdin)) < 0)
                quiterr("bad picture format");
                                                /* complete output header */
        if ((exp2report < 0.99) | (exp2report > 1.01))
                fputexpos(exp2report, stdout);
        if (rgbout) {
                fputprims(outprims, stdout);
                fputformat(COLRFMT, stdout);
        } else
                fputformat(CIEFMT, stdout);
        putc('\n', stdout);
        fputresolu(order, xmax, ymax, stdout);
                                                /* allocate scanline */
        scanin = (COLOR *)malloc(xmax*sizeof(COLOR));
        if (scanin == NULL)
                quiterr("out of memory in convert");
        scanout = doflat ? (COLR *)malloc(xmax*sizeof(COLR)) : (COLR *)NULL;
                                                /* convert image */
        for (y = 0; y < ymax; y++) {
                myreadscan(scanin, xmax);
                for (x = 0; x < xmax; x++) {
                        colortrans(scanin[x], xfm, scanin[x]);
                        if (rgbout)
                                clipgamut(scanin[x], bright(scanin[x]),
                                                CGAMUT_LOWER, cblack, cwhite);
                }
                if (scanout != NULL) {
                        for (x = 0; x < xmax; x++)
                                setcolr(scanout[x], colval(scanin[x],RED),
                                                colval(scanin[x],GRN),
                                                colval(scanin[x],BLU));
                        putbinary(scanout, sizeof(COLR), xmax, stdout);
                } else
                        fwritescan(scanin, xmax, stdout);
                if (ferror(stdout))
                        quiterr("error writing output picture");
        }
                                                /* free scanline */
        free(scanin);
        if (scanout != NULL)
                free(scanout);
}
Revision:	2.16
Committed:	Fri Jun 6 19:11:21 2025 UTC (5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.15:	+4 -4 lines
Log Message:	refactor: Making use of printargs() more consistent with fixargv0()
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.16	static const char RCSid[] = "$Id: ra_xyze.c,v 2.15 2024/10/01 20:04:44 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Program to convert between RADIANCE RGBE and XYZE formats
6	greg	2.6	* Added white-balance adjustment 10/01 (GW).
7	greg	2.1	*/
8
9			#include <math.h>
10	greg	2.16	#include "paths.h"
11	schorsch	2.7	#include "platform.h"
12	greg	2.1	#include "color.h"
13			#include "resolu.h"
14	greg	2.11	#include "rtio.h"
15	greg	2.1
16	greg	2.14	enum {InpUNK, InpRGB, InpXYZ, InpSPEC}; /* input format */
17			int infmt = InpUNK;
18	greg	2.1	int rgbout = 0; /* output should be RGBE? */
19			RGBPRIMS inprims = STDPRIMS; /* input primaries */
20			RGBPRIMS outprims = STDPRIMS; /* output primaries */
21			double expcomp = 1.0; /* exposure compensation */
22			int doflat = -1; /* produce flat file? */
23	greg	2.10	double origexp = -1.0; /* original exposure */
24	greg	2.1
25	schorsch	2.8	static gethfunc headline;
26	schorsch	2.9	static void quiterr(char *err);
27	greg	2.14	static void myreadscan(COLOR *scn, int len);
28	schorsch	2.9	static void convert(void);
29
30	greg	2.1
31	schorsch	2.8
32			static int
33			headline( /* process header line */
34			char *s,
35			void *p
36			)
37	greg	2.1	{
38	greg	2.12	char fmt[MAXFMTLEN];
39	greg	2.1
40			if (formatval(fmt, s)) { /* check if format string */
41			if (!strcmp(fmt,COLRFMT))
42	greg	2.14	infmt = InpRGB;
43	greg	2.1	else if (!strcmp(fmt,CIEFMT))
44	greg	2.14	infmt = InpXYZ;
45			else if (!strcmp(fmt,SPECFMT))
46			infmt = InpSPEC;
47	greg	2.1	else
48	greg	2.14	infmt = InpUNK;
49	gwlarson	2.5	return(0); /* don't echo */
50	greg	2.1	}
51	greg	2.10	if (origexp > 0.0 && isexpos(s)) {
52			origexp *= exposval(s);
53			return(0); /* don't echo */
54			}
55	greg	2.1	if (isprims(s)) { /* get input primaries */
56			primsval(inprims, s);
57	gwlarson	2.5	return(0); /* don't echo */
58	greg	2.1	}
59	greg	2.14	if (iswlsplit(s)) { /* get wavelength limits */
60			wlsplitval(WLPART, s);
61			return(0); /* don't echo */
62			}
63			if (isncomp(s)) { /* number of color samples */
64			NCSAMP = ncompval(s);
65			return(0); /* don't echo */
66			}
67	greg	2.1	/* should I grok colcorr also? */
68	gwlarson	2.5	return(fputs(s, stdout));
69	greg	2.1	}
70
71
72	schorsch	2.9	int
73			main(int argc, char *argv[])
74	greg	2.1	{
75			int i;
76	greg	2.16
77	schorsch	2.7	SET_DEFAULT_BINARY();
78			SET_FILE_BINARY(stdin);
79			SET_FILE_BINARY(stdout);
80	greg	2.16	fixargv0(argv[0]);
81	greg	2.1
82			for (i = 1; i < argc; i++)
83			if (argv[i][0] == '-')
84			switch (argv[i][1]) {
85			case 'c': /* rle-compressed output */
86			doflat = 0;
87			break;
88			case 'u': /* flat output */
89			doflat = 1;
90			break;
91			case 'r': /* RGBE output */
92			rgbout = 1;
93			break;
94			case 'p': /* RGB primaries */
95	greg	2.2	if (i+8 >= argc)
96	greg	2.1	goto userr;
97			outprims[RED][CIEX] = atof(argv[++i]);
98			outprims[RED][CIEY] = atof(argv[++i]);
99			outprims[GRN][CIEX] = atof(argv[++i]);
100			outprims[GRN][CIEY] = atof(argv[++i]);
101			outprims[BLU][CIEX] = atof(argv[++i]);
102			outprims[BLU][CIEY] = atof(argv[++i]);
103			outprims[WHT][CIEX] = atof(argv[++i]);
104			outprims[WHT][CIEY] = atof(argv[++i]);
105			break;
106	greg	2.10	case 'o': /* original exposure */
107			origexp = 1.0;
108			break;
109	greg	2.1	case 'e': /* exposure compensation */
110			expcomp = atof(argv[++i]);
111			if (argv[i][0] == '+' \|\| argv[i][0] == '-')
112			expcomp = pow(2., expcomp);
113			break;
114			default:
115			goto userr;
116			}
117			else
118			break;
119
120			if (doflat < 0)
121			doflat = !rgbout;
122			if (i < argc-2)
123			goto userr;
124			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
125			fprintf(stderr, "%s: can't open input \"%s\"\n",
126			progname, argv[i]);
127			exit(1);
128			}
129			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
130			fprintf(stderr, "%s: can't open output \"%s\"\n",
131			progname, argv[i+1]);
132			exit(1);
133			}
134			getheader(stdin, headline, NULL);
135	greg	2.14	if (infmt == InpUNK)
136			quiterr("unrecognized/missing input file format");
137	greg	2.15	if (infmt == InpSPEC ? (NCSAMP <= 3) \| (NCSAMP > MAXCSAMP) :
138			NCSAMP != 3)
139			quiterr("bad number of color components");
140	greg	2.1	printargs(argc, argv, stdout); /* add to header */
141			convert(); /* convert picture */
142			exit(0);
143			userr:
144	greg	2.10	fprintf(stderr, "Usage: %s [-r][-o][-e exp][-c\|-u]", progname);
145	greg	2.1	fprintf(stderr, "[-p rx ry gx gy bx by wx wy] [input [output]]\n");
146			exit(1);
147			}
148
149
150	schorsch	2.9	static void
151			quiterr( /* print message and exit */
152			char *err
153			)
154	greg	2.1	{
155			if (err != NULL) {
156			fprintf(stderr, "%s: %s\n", progname, err);
157			exit(1);
158			}
159			exit(0);
160			}
161
162
163	schorsch	2.9	static void
164	greg	2.14	myreadscan(COLOR *scn, int len)
165			{
166			if (infmt == InpSPEC) { /* read & convert to XYZ */
167	greg	2.15	static COLOR *scomp = NULL;
168			SCOLR sclr;
169			SCOLOR scol;
170			COLOR xyz;
171			int n;
172			if (scomp == NULL) { /* initialize conversion */
173			scomp = (COLOR )malloc(sizeof(COLOR)NCSAMP);
174			if (scomp == NULL)
175			quiterr("out of memory in myreadscan");
176			for (n = NCSAMP; n--; )
177			spec_cie(scomp[n],
178			WLPART[0] + (WLPART[3] - WLPART[0])*(n+1)/NCSAMP,
179			WLPART[0] + (WLPART[3] - WLPART[0])*n/NCSAMP);
180			}
181	greg	2.14	while (len-- > 0) {
182			if (getbinary(sclr, LSCOLR, 1, stdin) != 1)
183			goto readerr;
184			scolr_scolor(scol, sclr);
185	greg	2.15	setcolor(*scn, 0, 0, 0);
186			for (n = NCSAMP; n--; ) {
187			copycolor(xyz, scomp[n]);
188			scalecolor(xyz, scol[n]);
189			addcolor(*scn, xyz);
190			}
191			scn++;
192	greg	2.14	}
193			return;
194			} /* else read as RGBE/XYZE */
195			if (freadscan(scn, len, stdin) >= 0)
196			return;
197			readerr:
198			quiterr("error reading input picture");
199			}
200
201
202			static void
203	schorsch	2.9	convert(void) /* convert to XYZE or RGBE picture */
204	greg	2.1	{
205			int order;
206			int xmax, ymax;
207			COLORMAT xfm;
208	greg	2.14	COLOR *scanin;
209			COLR *scanout;
210	greg	2.10	double exp2do = expcomp;
211			double exp2report = expcomp;
212	greg	2.1	int y;
213	greg	2.14	int x;
214	greg	2.10	/* recover original? */
215			if (origexp > 0.0)
216			exp2do /= origexp;
217	greg	2.1	/* compute transform */
218			if (rgbout) {
219	greg	2.14	if (infmt == InpRGB) { /* RGBE -> RGBE */
220	greg	2.6	comprgb2rgbWBmat(xfm, inprims, outprims);
221	greg	2.14	} else { /* XYZE/Spectral -> RGBE */
222	greg	2.6	compxyz2rgbWBmat(xfm, outprims);
223	greg	2.14	}
224			if (infmt == InpXYZ) {
225	greg	2.10	if (origexp > 0.0)
226			exp2do /= WHTEFFICACY;
227			else
228			exp2report *= WHTEFFICACY;
229	greg	2.1	}
230			} else {
231	greg	2.14	if (infmt == InpRGB) { /* RGBE -> XYZE */
232	greg	2.6	comprgb2xyzWBmat(xfm, inprims);
233	greg	2.14	} else { /* XYZE/Spectral -> XYZE */
234			memset(xfm, 0, sizeof(xfm));
235			for (x = 3; x--; )
236			xfm[x][x] = 1.;
237			}
238			if (infmt != InpXYZ) {
239			if (origexp > 0)
240	greg	2.10	exp2do *= WHTEFFICACY;
241			else
242			exp2report /= WHTEFFICACY;
243	greg	2.1	}
244			}
245	gregl	2.4	for (y = 0; y < 3; y++)
246			for (x = 0; x < 3; x++)
247	greg	2.10	xfm[y][x] *= exp2do;
248	greg	2.1	/* get input resolution */
249			if ((order = fgetresolu(&xmax, &ymax, stdin)) < 0)
250			quiterr("bad picture format");
251			/* complete output header */
252	greg	2.10	if ((exp2report < 0.99) \| (exp2report > 1.01))
253			fputexpos(exp2report, stdout);
254	greg	2.1	if (rgbout) {
255			fputprims(outprims, stdout);
256			fputformat(COLRFMT, stdout);
257			} else
258			fputformat(CIEFMT, stdout);
259			putc('\n', stdout);
260			fputresolu(order, xmax, ymax, stdout);
261			/* allocate scanline */
262			scanin = (COLOR )malloc(xmaxsizeof(COLOR));
263			if (scanin == NULL)
264			quiterr("out of memory in convert");
265	greg	2.14	scanout = doflat ? (COLR )malloc(xmaxsizeof(COLR)) : (COLR *)NULL;
266	greg	2.1	/* convert image */
267			for (y = 0; y < ymax; y++) {
268	greg	2.14	myreadscan(scanin, xmax);
269	greg	2.3	for (x = 0; x < xmax; x++) {
270	greg	2.1	colortrans(scanin[x], xfm, scanin[x]);
271	greg	2.3	if (rgbout)
272			clipgamut(scanin[x], bright(scanin[x]),
273			CGAMUT_LOWER, cblack, cwhite);
274			}
275	greg	2.1	if (scanout != NULL) {
276			for (x = 0; x < xmax; x++)
277			setcolr(scanout[x], colval(scanin[x],RED),
278			colval(scanin[x],GRN),
279			colval(scanin[x],BLU));
280	greg	2.14	putbinary(scanout, sizeof(COLR), xmax, stdout);
281	greg	2.1	} else
282			fwritescan(scanin, xmax, stdout);
283			if (ferror(stdout))
284			quiterr("error writing output picture");
285			}
286			/* free scanline */
287	greg	2.14	free(scanin);
288	greg	2.1	if (scanout != NULL)
289	greg	2.14	free(scanout);
290	greg	2.1	}