src/px/pflip.c

#ifndef lint
static const char       RCSid[] = "$Id: pflip.c,v 2.7 2003/07/03 22:41:44 schorsch Exp $";
#endif
/*
 * flip picture file horizontally and/or vertically
 */

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

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

int     order;                          /* input orientation */
int     xres, yres;                     /* resolution (scanlen, nscans) */

long    *scanpos;                       /* scanline positions */

int     fhoriz=0, fvert=0;              /* flip flags */

int     correctorder = 0;               /* correcting orientation? */

FILE    *fin;                           /* input file */

char    *progname;


static void memerr(void);
static void scanfile(void);
static void flip(void);


static int
neworder(void)                  /* figure out new order from old */
{
        register int  no;

        if (correctorder)
                return(order);          /* just leave it */
        if ((no = order) & YMAJOR) {
                if (fhoriz) no ^= XDECR;
                if (fvert) no ^= YDECR;
        } else {
                if (fhoriz) no ^= YDECR;
                if (fvert) no ^= XDECR;
        }
        return(no);
}

int
main(
        int     argc,
        char    *argv[]
)
{
        static char     picfmt[LPICFMT+1] = PICFMT;
        int     i, rval;
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdout);
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (!strcmp(argv[i], "-h"))
                        fhoriz++;
                else if (!strcmp(argv[i], "-v"))
                        fvert++;
                else if (!strcmp(argv[i], "-c"))
                        correctorder++;
                else
                        break;
        if (i >= argc || argv[i][0] == '-') {
                fprintf(stderr, "Usage: %s [-h][-v][-c] infile [outfile]\n",
                                progname);
                exit(1);
        }
        if ((fin = fopen(argv[i], "r")) == NULL) {
                fprintf(stderr, "%s: cannot open\n", argv[1]);
                exit(1);
        }
        if (i < argc-1 && freopen(argv[i+1], "w", stdout) == NULL) {
                fprintf(stderr, "%s: cannot open\n", argv[i+1]);
                exit(1);
        }
                                        /* transfer header */
        if ((rval = checkheader(fin, picfmt, stdout)) < 0) {
                fprintf(stderr, "%s: input not a Radiance picture\n",
                                progname);
                exit(1);
        }
        if (rval)
                fputformat(picfmt, stdout);
                                        /* add new header info. */
        printargs(i, argv, stdout);
        putchar('\n');
                                        /* get picture size */
        if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
                fprintf(stderr, "%s: bad picture size\n", progname);
                exit(1);
        }
                                        /* write new picture size */
        fputresolu(neworder(), xres, yres, stdout);
                                        /* goto end if vertical flip */
        if (fvert)
                scanfile();
        flip();                         /* flip the image */
        exit(0);
}


static void
memerr(void)
{
        fprintf(stderr, "%s: out of memory\n", progname);
        exit(1);
}


static void
scanfile(void)                          /* scan to the end of file */
{
        extern long     ftell();
        COLR    *scanin;
        int     y;

        if ((scanpos = (long *)malloc(yres*sizeof(long))) == NULL)
                memerr();
        if ((scanin = (COLR *)malloc(xres*sizeof(COLR))) == NULL)
                memerr();
        for (y = yres-1; y > 0; y--) {
                scanpos[y] = ftell(fin);
                if (freadcolrs(scanin, xres, fin) < 0) {
                        fprintf(stderr, "%s: read error\n", progname);
                        exit(1);
                }
        }
        scanpos[0] = ftell(fin);
        free((void *)scanin);
}


static void
flip(void)                                      /* flip the picture */
{
        COLR    *scanin, *scanout;
        int     y;
        register int    x;

        if ((scanin = (COLR *)malloc(xres*sizeof(COLR))) == NULL)
                memerr();
        if (fhoriz) {
                if ((scanout = (COLR *)malloc(xres*sizeof(COLR))) == NULL)
                        memerr();
        } else
                scanout = scanin;
        for (y = yres-1; y >= 0; y--) {
                if (fvert && fseek(fin, scanpos[yres-1-y], 0) == EOF) {
                        fprintf(stderr, "%s: seek error\n", progname);
                        exit(1);
                }
                if (freadcolrs(scanin, xres, fin) < 0) {
                        fprintf(stderr, "%s: read error\n", progname);
                        exit(1);
                }
                if (fhoriz)
                        for (x = 0; x < xres; x++)
                                copycolr(scanout[x], scanin[xres-1-x]);
                if (fwritecolrs(scanout, xres, stdout) < 0) {
                        fprintf(stderr, "%s: write error\n", progname);
                        exit(1);
                }
        }
        free((void *)scanin);
        if (fhoriz)
                free((void *)scanout);
}
Revision:	2.8
Committed:	Sun Mar 28 20:33:14 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1, rad3R6, rad3R6P1
Changes since 2.7:	+19 -10 lines
Log Message:	Continued ANSIfication, and other fixes and clarifications.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.8	static const char RCSid[] = "$Id: pflip.c,v 2.7 2003/07/03 22:41:44 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* flip picture file horizontally and/or vertically
6			*/
7
8	greg	1.3	#include <stdio.h>
9	greg	2.5	#include <time.h>
10	schorsch	2.7	#include <string.h>
11	greg	2.5
12	schorsch	2.6	#include "platform.h"
13	greg	1.1	#include "color.h"
14	greg	1.5	#include "resolu.h"
15	greg	1.1
16	greg	1.5	int order; /* input orientation */
17			int xres, yres; /* resolution (scanlen, nscans) */
18
19	greg	1.1	long scanpos; / scanline positions */
20
21	greg	1.5	int fhoriz=0, fvert=0; /* flip flags */
22	greg	1.1
23	greg	1.5	int correctorder = 0; /* correcting orientation? */
24
25	greg	1.1	FILE fin; / input file */
26
27			char *progname;
28
29	greg	2.2
30	schorsch	2.8	static void memerr(void);
31			static void scanfile(void);
32			static void flip(void);
33
34
35			static int
36			neworder(void) /* figure out new order from old */
37	greg	1.5	{
38			register int no;
39
40			if (correctorder)
41			return(order); /* just leave it */
42			if ((no = order) & YMAJOR) {
43			if (fhoriz) no ^= XDECR;
44			if (fvert) no ^= YDECR;
45			} else {
46			if (fhoriz) no ^= YDECR;
47			if (fvert) no ^= XDECR;
48			}
49			return(no);
50			}
51
52	schorsch	2.8	int
53			main(
54			int argc,
55			char *argv[]
56			)
57	greg	1.1	{
58	greg	2.4	static char picfmt[LPICFMT+1] = PICFMT;
59			int i, rval;
60	schorsch	2.6	SET_DEFAULT_BINARY();
61			SET_FILE_BINARY(stdout);
62	greg	1.1	progname = argv[0];
63
64			for (i = 1; i < argc; i++)
65			if (!strcmp(argv[i], "-h"))
66			fhoriz++;
67			else if (!strcmp(argv[i], "-v"))
68			fvert++;
69	greg	1.5	else if (!strcmp(argv[i], "-c"))
70			correctorder++;
71	greg	1.1	else
72			break;
73			if (i >= argc \|\| argv[i][0] == '-') {
74	greg	1.5	fprintf(stderr, "Usage: %s [-h][-v][-c] infile [outfile]\n",
75	greg	1.1	progname);
76			exit(1);
77			}
78			if ((fin = fopen(argv[i], "r")) == NULL) {
79			fprintf(stderr, "%s: cannot open\n", argv[1]);
80			exit(1);
81			}
82			if (i < argc-1 && freopen(argv[i+1], "w", stdout) == NULL) {
83			fprintf(stderr, "%s: cannot open\n", argv[i+1]);
84			exit(1);
85			}
86			/* transfer header */
87	greg	2.4	if ((rval = checkheader(fin, picfmt, stdout)) < 0) {
88	greg	1.4	fprintf(stderr, "%s: input not a Radiance picture\n",
89			progname);
90			exit(1);
91			}
92	greg	2.4	if (rval)
93			fputformat(picfmt, stdout);
94	greg	1.1	/* add new header info. */
95	greg	1.2	printargs(i, argv, stdout);
96	greg	1.1	putchar('\n');
97			/* get picture size */
98	greg	1.5	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
99	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
100			exit(1);
101			}
102			/* write new picture size */
103	greg	1.5	fputresolu(neworder(), xres, yres, stdout);
104	greg	1.1	/* goto end if vertical flip */
105			if (fvert)
106			scanfile();
107			flip(); /* flip the image */
108			exit(0);
109			}
110
111
112	schorsch	2.8	static void
113			memerr(void)
114	greg	1.1	{
115			fprintf(stderr, "%s: out of memory\n", progname);
116			exit(1);
117			}
118
119
120	schorsch	2.8	static void
121			scanfile(void) /* scan to the end of file */
122	greg	1.1	{
123			extern long ftell();
124			COLR *scanin;
125			int y;
126
127			if ((scanpos = (long )malloc(yressizeof(long))) == NULL)
128			memerr();
129			if ((scanin = (COLR )malloc(xressizeof(COLR))) == NULL)
130			memerr();
131	greg	2.3	for (y = yres-1; y > 0; y--) {
132	greg	1.1	scanpos[y] = ftell(fin);
133			if (freadcolrs(scanin, xres, fin) < 0) {
134			fprintf(stderr, "%s: read error\n", progname);
135			exit(1);
136			}
137			}
138	greg	2.3	scanpos[0] = ftell(fin);
139	greg	2.5	free((void *)scanin);
140	greg	1.1	}
141
142
143	schorsch	2.8	static void
144			flip(void) /* flip the picture */
145	greg	1.1	{
146			COLR scanin, scanout;
147			int y;
148			register int x;
149
150			if ((scanin = (COLR )malloc(xressizeof(COLR))) == NULL)
151			memerr();
152			if (fhoriz) {
153			if ((scanout = (COLR )malloc(xressizeof(COLR))) == NULL)
154			memerr();
155			} else
156			scanout = scanin;
157			for (y = yres-1; y >= 0; y--) {
158			if (fvert && fseek(fin, scanpos[yres-1-y], 0) == EOF) {
159			fprintf(stderr, "%s: seek error\n", progname);
160			exit(1);
161			}
162			if (freadcolrs(scanin, xres, fin) < 0) {
163			fprintf(stderr, "%s: read error\n", progname);
164			exit(1);
165			}
166			if (fhoriz)
167			for (x = 0; x < xres; x++)
168			copycolr(scanout[x], scanin[xres-1-x]);
169			if (fwritecolrs(scanout, xres, stdout) < 0) {
170			fprintf(stderr, "%s: write error\n", progname);
171			exit(1);
172			}
173			}
174	greg	2.5	free((void *)scanin);
175	greg	2.3	if (fhoriz)
176	greg	2.5	free((void *)scanout);
177	greg	1.1	}