src/px/ra_avs.c

/* Copyright (c) 1993 Regents of the University of California */

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

/*
 *  Convert Radiance file to/from AVS file.
 */

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

extern char  *malloc();

double  gamcor = 2.2;                   /* gamma correction */

int  bradj = 0;                         /* brightness adjustment */

char  *progname;

int  xmax, ymax;


main(argc, argv)
int  argc;
char  *argv[];
{
        extern long  getint();
        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 */
                xmax = getint(4, stdin);
                ymax = getint(4, stdin);
                if (feof(stdin))
                        quiterr("empty input file");
                                        /* put our header */
                printargs(i, argv, stdout);
                fputformat(COLRFMT, stdout);
                putchar('\n');
                fprtresolu(xmax, ymax, stdout);
                                        /* convert file */
                avs2ra();
        } else {
                                        /* get our header */
                if (checkheader(stdin, COLRFMT, NULL) < 0 ||
                                fgetresolu(&xmax, &ymax, stdin) < 0)
                        quiterr("bad picture format");
                                        /* write their header */
                putint((long)xmax, 4, stdout);
                putint((long)ymax, 4, stdout);
                                        /* convert file */
                ra2avs();
        }
        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);
}


avs2ra()                /* 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 avs2ra");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                for (x = 0; x < xmax; x++) {
                        (void)getc(stdin);                      /* toss alpha */
                        scanout[x][RED] = getc(stdin);
                        scanout[x][GRN] = getc(stdin);
                        scanout[x][BLU] = getc(stdin);
                }
                if (feof(stdin) | ferror(stdin))
                        quiterr("error reading AVS 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);
}


ra2avs()                /* 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 ra2avs");
                                                /* 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(0, stdout);                /* no alpha */
                        putc(scanin[x][RED], stdout);
                        putc(scanin[x][GRN], stdout);
                        putc(scanin[x][BLU], stdout);
                }
                if (ferror(stdout))
                        quiterr("error writing AVS file");
        }
                                                /* free scanline */
        free((char *)scanin);
}
Revision:	2.7
Committed:	Wed Dec 1 10:02:15 1993 UTC (30 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.6:	+2 -0 lines
Log Message:	fixed detection of empty AVS input file
#	User	Rev	Content
1	greg	2.1	/* Copyright (c) 1993 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Convert Radiance file to/from AVS file.
9			*/
10
11			#include <stdio.h>
12	greg	2.3	#include <math.h>
13	greg	2.1	#ifdef MSDOS
14			#include <fcntl.h>
15			#endif
16			#include "color.h"
17			#include "resolu.h"
18
19			extern char *malloc();
20
21	greg	2.4	double gamcor = 2.2; /* gamma correction */
22	greg	2.1
23			int bradj = 0; /* brightness adjustment */
24
25			char *progname;
26
27			int xmax, ymax;
28
29
30			main(argc, argv)
31			int argc;
32			char *argv[];
33			{
34	greg	2.2	extern long getint();
35	greg	2.1	int reverse = 0;
36			int i;
37
38			progname = argv[0];
39
40			for (i = 1; i < argc; i++)
41			if (argv[i][0] == '-')
42			switch (argv[i][1]) {
43			case 'g': /* gamma correction */
44	greg	2.4	gamcor = atof(argv[++i]);
45	greg	2.1	break;
46			case 'e': /* exposure adjustment */
47			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
48			goto userr;
49			bradj = atoi(argv[++i]);
50			break;
51			case 'r': /* reverse conversion */
52			reverse = 1;
53			break;
54			default:
55			goto userr;
56			}
57			else
58			break;
59
60			if (i < argc-2)
61			goto userr;
62			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
63			fprintf(stderr, "%s: can't open input \"%s\"\n",
64			progname, argv[i]);
65			exit(1);
66			}
67			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
68	greg	2.6	fprintf(stderr, "%s: can't open output \"%s\"\n",
69	greg	2.1	progname, argv[i+1]);
70			exit(1);
71			}
72			#ifdef MSDOS
73			setmode(fileno(stdin), O_BINARY);
74			setmode(fileno(stdout), O_BINARY);
75			#endif
76	greg	2.4	setcolrgam(gamcor); /* set up gamma correction */
77	greg	2.1	if (reverse) {
78			/* get their image resolution */
79	greg	2.2	xmax = getint(4, stdin);
80			ymax = getint(4, stdin);
81	greg	2.7	if (feof(stdin))
82			quiterr("empty input file");
83	greg	2.1	/* put our header */
84			printargs(i, argv, stdout);
85			fputformat(COLRFMT, stdout);
86			putchar('\n');
87			fprtresolu(xmax, ymax, stdout);
88			/* convert file */
89			avs2ra();
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	greg	2.2	putint((long)xmax, 4, stdout);
97			putint((long)ymax, 4, stdout);
98	greg	2.1	/* convert file */
99			ra2avs();
100			}
101			exit(0);
102			userr:
103			fprintf(stderr,
104			"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
105			progname);
106			exit(1);
107			}
108
109
110			quiterr(err) /* print message and exit */
111			char *err;
112			{
113			if (err != NULL) {
114			fprintf(stderr, "%s: %s\n", progname, err);
115			exit(1);
116			}
117			exit(0);
118			}
119
120
121			avs2ra() /* convert 24-bit scanlines to Radiance picture */
122			{
123			COLR *scanout;
124			register int x;
125			int y;
126			/* allocate scanline */
127			scanout = (COLR )malloc(xmaxsizeof(COLR));
128			if (scanout == NULL)
129			quiterr("out of memory in avs2ra");
130			/* convert image */
131			for (y = ymax-1; y >= 0; y--) {
132	greg	2.5	for (x = 0; x < xmax; x++) {
133			(void)getc(stdin); /* toss alpha */
134			scanout[x][RED] = getc(stdin);
135			scanout[x][GRN] = getc(stdin);
136			scanout[x][BLU] = getc(stdin);
137			}
138			if (feof(stdin) \| ferror(stdin))
139	greg	2.1	quiterr("error reading AVS image");
140			/* undo gamma */
141			gambs_colrs(scanout, xmax);
142			if (bradj) /* adjust exposure */
143			shiftcolrs(scanout, xmax, bradj);
144			if (fwritecolrs(scanout, xmax, stdout) < 0)
145			quiterr("error writing Radiance picture");
146			}
147			/* free scanline */
148			free((char *)scanout);
149			}
150
151
152			ra2avs() /* convert Radiance scanlines to 24-bit */
153			{
154			COLR *scanin;
155			register int x;
156			int y;
157			/* allocate scanline */
158			scanin = (COLR )malloc(xmaxsizeof(COLR));
159			if (scanin == NULL)
160			quiterr("out of memory in ra2avs");
161			/* convert image */
162			for (y = ymax-1; y >= 0; y--) {
163			if (freadcolrs(scanin, xmax, stdin) < 0)
164			quiterr("error reading Radiance picture");
165			if (bradj) /* adjust exposure */
166			shiftcolrs(scanin, xmax, bradj);
167			colrs_gambs(scanin, xmax); /* gamma correction */
168			for (x = 0; x < xmax; x++) {
169			putc(0, stdout); /* no alpha */
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 AVS file");
176			}
177			/* free scanline */
178			free((char *)scanin);
179			}