src/px/ra_skel.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#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 -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>
#include  <math.h>
#ifdef MSDOS
#include  <fcntl.h>
#endif
#include  <time.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);
        }
#ifdef MSDOS
        setmode(fileno(stdin), O_BINARY);
        setmode(fileno(stdout), O_BINARY);
#endif
        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:	2.11
Committed:	Sat Feb 22 02:07:28 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 2.10:	+4 -8 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.11	static const char RCSid[] = "$Id$";
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			* cc $(CFLAGS) -o ra_skel ra_skel.o -lrt -lm
11			* 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			* the common subdirectory instead of using the -lrt library.
16			*/
17
18			#include <stdio.h>
19	greg	2.5	#include <math.h>
20	greg	2.3	#ifdef MSDOS
21			#include <fcntl.h>
22			#endif
23	greg	2.11	#include <time.h>
24	greg	2.1	#include "color.h"
25			#include "resolu.h"
26
27	greg	2.6	double gamcor = 2.2; /* gamma correction */
28	greg	2.1
29			int bradj = 0; /* brightness adjustment */
30
31			char *progname;
32
33			int xmax, ymax;
34
35
36			main(argc, argv)
37			int argc;
38			char *argv[];
39			{
40			int reverse = 0;
41			int i;
42
43			progname = argv[0];
44
45			for (i = 1; i < argc; i++)
46			if (argv[i][0] == '-')
47			switch (argv[i][1]) {
48			case 'g': /* gamma correction */
49	greg	2.6	gamcor = atof(argv[++i]);
50	greg	2.1	break;
51			case 'e': /* exposure adjustment */
52			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
53			goto userr;
54			bradj = atoi(argv[++i]);
55			break;
56			case 'r': /* reverse conversion */
57			reverse = 1;
58			break;
59			default:
60			goto userr;
61			}
62			else
63			break;
64
65			if (i < argc-2)
66			goto userr;
67			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
68			fprintf(stderr, "%s: can't open input \"%s\"\n",
69			progname, argv[i]);
70			exit(1);
71			}
72			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
73	greg	2.8	fprintf(stderr, "%s: can't open output \"%s\"\n",
74	greg	2.1	progname, argv[i+1]);
75			exit(1);
76			}
77	greg	2.3	#ifdef MSDOS
78			setmode(fileno(stdin), O_BINARY);
79			setmode(fileno(stdout), O_BINARY);
80			#endif
81	greg	2.6	setcolrgam(gamcor); /* set up gamma correction */
82	greg	2.1	if (reverse) {
83			/* get their image resolution */
84			read_skel_head(&xmax, &ymax);
85			/* put our header */
86	greg	2.9	newheader("RADIANCE", stdout);
87	greg	2.1	printargs(i, argv, stdout);
88			fputformat(COLRFMT, stdout);
89			putchar('\n');
90			fprtresolu(xmax, ymax, stdout);
91			/* convert file */
92			skel2ra();
93			} else {
94			/* get our header */
95			if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
96			fgetresolu(&xmax, &ymax, stdin) < 0)
97			quiterr("bad picture format");
98			/* write their header */
99			write_skel_head(xmax, ymax);
100			/* convert file */
101			ra2skel();
102			}
103			exit(0);
104			userr:
105			fprintf(stderr,
106			"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
107			progname);
108			exit(1);
109			}
110
111
112			quiterr(err) /* print message and exit */
113			char *err;
114			{
115			if (err != NULL) {
116			fprintf(stderr, "%s: %s\n", progname, err);
117			exit(1);
118			}
119			exit(0);
120			}
121
122
123			skel2ra() /* convert 24-bit scanlines to Radiance picture */
124			{
125			COLR *scanout;
126			register int x;
127			int y;
128			/* allocate scanline */
129			scanout = (COLR )malloc(xmaxsizeof(COLR));
130			if (scanout == NULL)
131			quiterr("out of memory in skel2ra");
132			/* convert image */
133			for (y = ymax-1; y >= 0; y--) {
134	greg	2.7	for (x = 0; x < xmax; x++) {
135			scanout[x][RED] = getc(stdin);
136			scanout[x][GRN] = getc(stdin);
137			scanout[x][BLU] = getc(stdin);
138			}
139			if (feof(stdin) \| ferror(stdin))
140	greg	2.1	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	greg	2.11	free((void *)scanout);
150	greg	2.1	}
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	greg	2.11	free((void *)scanin);
179	greg	2.1	}