src/px/ra_skel.c

/* Copyright (c) 1992 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  Skeletal 24-bit image conversion program.  Replace "skel"
 *  in this file with a more appropriate image type identifier.
 *
 *  The Makefile entry should look something like this:
 *      ra_skel:        ra_skel.o
 *              cc $(CFLAGS) -o ra_skel ra_skel.o -lrt -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 -lrt library.
 */

#include  <stdio.h>
#ifdef MSDOS
#include  <fcntl.h>
#endif
#include  "color.h"
#include  "resolu.h"

extern char  *malloc();

double  gamma = 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 */
                                gamma = 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, "can't open output \"%s\"\n",
                                progname, argv[i+1]);
                exit(1);
        }
#ifdef MSDOS
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
#endif
        setcolrgam(gamma);              /* set up gamma correction */
        if (reverse) {
                                        /* get their image resolution */
                read_skel_head(&xmax, &ymax);
                                        /* put our header */
                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--) {
                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((char *)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((char *)scanin);
}
Revision:	2.4
Committed:	Thu Dec 17 15:50:13 1992 UTC (31 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+2 -0 lines
Log Message:	fixed munged comment
#	User	Rev	Content
1	greg	2.3	/* Copyright (c) 1992 Regents of the University of California */
2
3	greg	2.1	#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7	greg	2.4	/*
8			* Skeletal 24-bit image conversion program. Replace "skel"
9	greg	2.1	* in this file with a more appropriate image type identifier.
10			*
11			* The Makefile entry should look something like this:
12			* ra_skel: ra_skel.o
13			* cc $(CFLAGS) -o ra_skel ra_skel.o -lrt -lm
14			* ra_skel.o: ../common/color.h ../common/resolu.h
15			*
16			* If you like to do things the hard way, you can link directly
17			* to the object files "color.o colrops.o resolu.o header.o" in
18			* the common subdirectory instead of using the -lrt library.
19			*/
20
21			#include <stdio.h>
22	greg	2.3	#ifdef MSDOS
23			#include <fcntl.h>
24			#endif
25	greg	2.1	#include "color.h"
26			#include "resolu.h"
27
28	greg	2.3	extern char *malloc();
29	greg	2.1
30			double gamma = 2.2; /* gamma correction */
31
32			int bradj = 0; /* brightness adjustment */
33
34			char *progname;
35
36			int xmax, ymax;
37
38
39			main(argc, argv)
40			int argc;
41			char *argv[];
42			{
43			int reverse = 0;
44			int i;
45
46			progname = argv[0];
47
48			for (i = 1; i < argc; i++)
49			if (argv[i][0] == '-')
50			switch (argv[i][1]) {
51			case 'g': /* gamma correction */
52			gamma = atof(argv[++i]);
53			break;
54			case 'e': /* exposure adjustment */
55			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
56			goto userr;
57			bradj = atoi(argv[++i]);
58			break;
59			case 'r': /* reverse conversion */
60			reverse = 1;
61			break;
62			default:
63			goto userr;
64			}
65			else
66			break;
67
68			if (i < argc-2)
69			goto userr;
70			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
71			fprintf(stderr, "%s: can't open input \"%s\"\n",
72			progname, argv[i]);
73			exit(1);
74			}
75			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
76			fprintf(stderr, "can't open output \"%s\"\n",
77			progname, argv[i+1]);
78			exit(1);
79			}
80	greg	2.3	#ifdef MSDOS
81			setmode(fileno(stdin), O_BINARY);
82			setmode(fileno(stdout), O_BINARY);
83			#endif
84	greg	2.1	setcolrgam(gamma); /* set up gamma correction */
85			if (reverse) {
86			/* get their image resolution */
87			read_skel_head(&xmax, &ymax);
88			/* put our header */
89			printargs(i, argv, stdout);
90			fputformat(COLRFMT, stdout);
91			putchar('\n');
92			fprtresolu(xmax, ymax, stdout);
93			/* convert file */
94			skel2ra();
95			} else {
96			/* get our header */
97			if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
98			fgetresolu(&xmax, &ymax, stdin) < 0)
99			quiterr("bad picture format");
100			/* write their header */
101			write_skel_head(xmax, ymax);
102			/* convert file */
103			ra2skel();
104			}
105			exit(0);
106			userr:
107			fprintf(stderr,
108			"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
109			progname);
110			exit(1);
111			}
112
113
114			quiterr(err) /* print message and exit */
115			char *err;
116			{
117			if (err != NULL) {
118			fprintf(stderr, "%s: %s\n", progname, err);
119			exit(1);
120			}
121			exit(0);
122			}
123
124
125			skel2ra() /* convert 24-bit scanlines to Radiance picture */
126			{
127			COLR *scanout;
128			register int x;
129			int y;
130			/* allocate scanline */
131			scanout = (COLR )malloc(xmaxsizeof(COLR));
132			if (scanout == NULL)
133			quiterr("out of memory in skel2ra");
134			/* convert image */
135			for (y = ymax-1; y >= 0; y--) {
136			scanout[x][RED] = getc(stdin);
137			scanout[x][GRN] = getc(stdin);
138			scanout[x][BLU] = getc(stdin);
139			if (feof(stdin) \|\| ferror(stdin))
140			quiterr("error reading skel image");
141			/* undo gamma */
142			gambs_colrs(scanout, xmax);
143			if (bradj) /* adjust exposure */
144			shiftcolrs(scanout, xmax, bradj);
145			if (fwritecolrs(scanout, xmax, stdout) < 0)
146			quiterr("error writing Radiance picture");
147			}
148			/* free scanline */
149			free((char *)scanout);
150			}
151
152
153			ra2skel() /* convert Radiance scanlines to 24-bit */
154			{
155			COLR *scanin;
156			register int x;
157			int y;
158			/* allocate scanline */
159			scanin = (COLR )malloc(xmaxsizeof(COLR));
160			if (scanin == NULL)
161			quiterr("out of memory in ra2skel");
162			/* convert image */
163			for (y = ymax-1; y >= 0; y--) {
164			if (freadcolrs(scanin, xmax, stdin) < 0)
165			quiterr("error reading Radiance picture");
166			if (bradj) /* adjust exposure */
167			shiftcolrs(scanin, xmax, bradj);
168			colrs_gambs(scanin, xmax); /* gamma correction */
169			for (x = 0; x < xmax; x++) {
170			putc(scanin[x][RED], stdout);
171			putc(scanin[x][GRN], stdout);
172			putc(scanin[x][BLU], stdout);
173			}
174			if (ferror(stdout))
175			quiterr("error writing skel file");
176			}
177			/* free scanline */
178			free((char *)scanin);
179			}