src/px/ra_skel.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_skel.c,v 2.12 2003/06/05 19:29:34 schorsch Exp $";
#endif
/*
 *  Skeletal 24-bit image conversion program.  Replace "skel"
 *  in this file with a more appropriate image type identifier.
 *
 *  The Rmakefile entry should look something like this:
 *      ra_skel:        ra_skel.o
 *              cc $(CFLAGS) -o ra_skel ra_skel.o -lrtrad -lm
 *      ra_skel.o:      ../common/color.h ../common/resolu.h
 *
 *  If you like to do things the hard way, you can link directly
 *  to the object files "color.o colrops.o resolu.o header.o" in
 *  the common subdirectory instead of using the -lrtrad library.
 */

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

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

double  gamcor = 2.2;                   /* gamma correction */

int  bradj = 0;                         /* brightness adjustment */

char  *progname;

int  xmax, ymax;


main(argc, argv)
int  argc;
char  *argv[];
{
        int  reverse = 0;
        int  i;
        
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'g':               /* gamma correction */
                                gamcor = atof(argv[++i]);
                                break;
                        case 'e':               /* exposure adjustment */
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        case 'r':               /* reverse conversion */
                                reverse = 1;
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        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);
        }
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        setcolrgam(gamcor);             /* set up gamma correction */
        if (reverse) {
                                        /* get their image resolution */
                read_skel_head(&xmax, &ymax);
                                        /* put our header */
                newheader("RADIANCE", stdout);
                printargs(i, argv, stdout);
                fputformat(COLRFMT, stdout);
                putchar('\n');
                fprtresolu(xmax, ymax, stdout);
                                        /* convert file */
                skel2ra();
        } else {
                                        /* get our header */
                if (checkheader(stdin, COLRFMT, NULL) < 0 ||
                                fgetresolu(&xmax, &ymax, stdin) < 0)
                        quiterr("bad picture format");
                                        /* write their header */
                write_skel_head(xmax, ymax);
                                        /* convert file */
                ra2skel();
        }
        exit(0);
userr:
        fprintf(stderr,
                "Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
                        progname);
        exit(1);
}


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


skel2ra()               /* convert 24-bit scanlines to Radiance picture */
{
        COLR    *scanout;
        register int    x;
        int     y;
                                                /* allocate scanline */
        scanout = (COLR *)malloc(xmax*sizeof(COLR));
        if (scanout == NULL)
                quiterr("out of memory in skel2ra");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                for (x = 0; x < xmax; x++) {
                        scanout[x][RED] = getc(stdin);
                        scanout[x][GRN] = getc(stdin);
                        scanout[x][BLU] = getc(stdin);
                }
                if (feof(stdin) | ferror(stdin))
                        quiterr("error reading skel image");
                                                /* undo gamma */
                gambs_colrs(scanout, xmax);
                if (bradj)                      /* adjust exposure */
                        shiftcolrs(scanout, xmax, bradj);
                if (fwritecolrs(scanout, xmax, stdout) < 0)
                        quiterr("error writing Radiance picture");
        }
                                                /* free scanline */
        free((void *)scanout);
}


ra2skel()               /* convert Radiance scanlines to 24-bit */
{
        COLR    *scanin;
        register int    x;
        int     y;
                                                /* allocate scanline */
        scanin = (COLR *)malloc(xmax*sizeof(COLR));
        if (scanin == NULL)
                quiterr("out of memory in ra2skel");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(scanin, xmax, stdin) < 0)
                        quiterr("error reading Radiance picture");
                if (bradj)                      /* adjust exposure */
                        shiftcolrs(scanin, xmax, bradj);
                colrs_gambs(scanin, xmax);      /* gamma correction */
                for (x = 0; x < xmax; x++) {
                        putc(scanin[x][RED], stdout);
                        putc(scanin[x][GRN], stdout);
                        putc(scanin[x][BLU], stdout);
                }
                if (ferror(stdout))
                        quiterr("error writing skel file");
        }
                                                /* free scanline */
        free((void *)scanin);
}
Revision:	2.13
Committed:	Fri Mar 10 19:40:13 2006 UTC (18 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad4R2, rad4R1, rad4R0, rad3R8, rad3R9, rad4R2P1, rad5R3, HEAD
Changes since 2.12:	+3 -3 lines
Log Message:	Renamed librt.a to librtrad.a to avoid conflict on Solaris.
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.13	static const char RCSid[] = "$Id: ra_skel.c,v 2.12 2003/06/05 19:29:34 schorsch Exp $";
3	greg	2.1	#endif
4	greg	2.4	/*
5			* Skeletal 24-bit image conversion program. Replace "skel"
6	greg	2.1	* in this file with a more appropriate image type identifier.
7			*
8	greg	2.10	* The Rmakefile entry should look something like this:
9	greg	2.1	* ra_skel: ra_skel.o
10	schorsch	2.13	* cc $(CFLAGS) -o ra_skel ra_skel.o -lrtrad -lm
11	greg	2.1	* ra_skel.o: ../common/color.h ../common/resolu.h
12			*
13			* If you like to do things the hard way, you can link directly
14			* to the object files "color.o colrops.o resolu.o header.o" in
15	schorsch	2.13	* the common subdirectory instead of using the -lrtrad library.
16	greg	2.1	*/
17
18			#include <stdio.h>
19	greg	2.5	#include <math.h>
20	greg	2.11	#include <time.h>
21	schorsch	2.12
22			#include "platform.h"
23	greg	2.1	#include "color.h"
24			#include "resolu.h"
25
26	greg	2.6	double gamcor = 2.2; /* gamma correction */
27	greg	2.1
28			int bradj = 0; /* brightness adjustment */
29
30			char *progname;
31
32			int xmax, ymax;
33
34
35			main(argc, argv)
36			int argc;
37			char *argv[];
38			{
39			int reverse = 0;
40			int i;
41
42			progname = argv[0];
43
44			for (i = 1; i < argc; i++)
45			if (argv[i][0] == '-')
46			switch (argv[i][1]) {
47			case 'g': /* gamma correction */
48	greg	2.6	gamcor = atof(argv[++i]);
49	greg	2.1	break;
50			case 'e': /* exposure adjustment */
51			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
52			goto userr;
53			bradj = atoi(argv[++i]);
54			break;
55			case 'r': /* reverse conversion */
56			reverse = 1;
57			break;
58			default:
59			goto userr;
60			}
61			else
62			break;
63
64			if (i < argc-2)
65			goto userr;
66			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
67			fprintf(stderr, "%s: can't open input \"%s\"\n",
68			progname, argv[i]);
69			exit(1);
70			}
71			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
72	greg	2.8	fprintf(stderr, "%s: can't open output \"%s\"\n",
73	greg	2.1	progname, argv[i+1]);
74			exit(1);
75			}
76	schorsch	2.12	SET_FILE_BINARY(stdin);
77			SET_FILE_BINARY(stdout);
78	greg	2.6	setcolrgam(gamcor); /* set up gamma correction */
79	greg	2.1	if (reverse) {
80			/* get their image resolution */
81			read_skel_head(&xmax, &ymax);
82			/* put our header */
83	greg	2.9	newheader("RADIANCE", stdout);
84	greg	2.1	printargs(i, argv, stdout);
85			fputformat(COLRFMT, stdout);
86			putchar('\n');
87			fprtresolu(xmax, ymax, stdout);
88			/* convert file */
89			skel2ra();
90			} else {
91			/* get our header */
92			if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
93			fgetresolu(&xmax, &ymax, stdin) < 0)
94			quiterr("bad picture format");
95			/* write their header */
96			write_skel_head(xmax, ymax);
97			/* convert file */
98			ra2skel();
99			}
100			exit(0);
101			userr:
102			fprintf(stderr,
103			"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
104			progname);
105			exit(1);
106			}
107
108
109			quiterr(err) /* print message and exit */
110			char *err;
111			{
112			if (err != NULL) {
113			fprintf(stderr, "%s: %s\n", progname, err);
114			exit(1);
115			}
116			exit(0);
117			}
118
119
120			skel2ra() /* convert 24-bit scanlines to Radiance picture */
121			{
122			COLR *scanout;
123			register int x;
124			int y;
125			/* allocate scanline */
126			scanout = (COLR )malloc(xmaxsizeof(COLR));
127			if (scanout == NULL)
128			quiterr("out of memory in skel2ra");
129			/* convert image */
130			for (y = ymax-1; y >= 0; y--) {
131	greg	2.7	for (x = 0; x < xmax; x++) {
132			scanout[x][RED] = getc(stdin);
133			scanout[x][GRN] = getc(stdin);
134			scanout[x][BLU] = getc(stdin);
135			}
136			if (feof(stdin) \| ferror(stdin))
137	greg	2.1	quiterr("error reading skel image");
138			/* undo gamma */
139			gambs_colrs(scanout, xmax);
140			if (bradj) /* adjust exposure */
141			shiftcolrs(scanout, xmax, bradj);
142			if (fwritecolrs(scanout, xmax, stdout) < 0)
143			quiterr("error writing Radiance picture");
144			}
145			/* free scanline */
146	greg	2.11	free((void *)scanout);
147	greg	2.1	}
148
149
150			ra2skel() /* convert Radiance scanlines to 24-bit */
151			{
152			COLR *scanin;
153			register int x;
154			int y;
155			/* allocate scanline */
156			scanin = (COLR )malloc(xmaxsizeof(COLR));
157			if (scanin == NULL)
158			quiterr("out of memory in ra2skel");
159			/* convert image */
160			for (y = ymax-1; y >= 0; y--) {
161			if (freadcolrs(scanin, xmax, stdin) < 0)
162			quiterr("error reading Radiance picture");
163			if (bradj) /* adjust exposure */
164			shiftcolrs(scanin, xmax, bradj);
165			colrs_gambs(scanin, xmax); /* gamma correction */
166			for (x = 0; x < xmax; x++) {
167			putc(scanin[x][RED], stdout);
168			putc(scanin[x][GRN], stdout);
169			putc(scanin[x][BLU], stdout);
170			}
171			if (ferror(stdout))
172			quiterr("error writing skel file");
173			}
174			/* free scanline */
175	greg	2.11	free((void *)scanin);
176	greg	2.1	}