src/px/pflip.c

#ifndef lint
static const char       RCSid[] = "$Id: pflip.c,v 2.11 2018/08/02 18:33:44 greg Exp $";
#endif
/*
 * flip picture file horizontally and/or vertically
 */

#include "rtio.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[MAXFMTLEN] = 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-2)
                goto userr;
        if (!fhoriz && !fvert)
                fprintf(stderr, "%s: warning - no operation\n", argv[0]);
        if (i >= argc || argv[i][0] == '-') {
                if (fvert)
                        goto userr;
                SET_FILE_BINARY(stdin);
                fin = stdin;
        } else if ((fin = fopen(argv[i], "r")) == NULL) {
                fprintf(stderr, "%s: cannot open\n", argv[i]);
                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);
userr:
        fprintf(stderr, "Usage: %s [-h][-v][-c] infile [outfile]\n",
                        progname);
        exit(1);
}


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:	2.12
Committed:	Fri Jul 19 17:37:56 2019 UTC (4 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R3, HEAD
Changes since 2.11:	+2 -5 lines
Log Message:	Moved declarations and definitions for header.c from resolu.h to rtio.h
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.12	static const char RCSid[] = "$Id: pflip.c,v 2.11 2018/08/02 18:33:44 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* flip picture file horizontally and/or vertically
6			*/
7
8	greg	2.12	#include "rtio.h"
9	schorsch	2.6	#include "platform.h"
10	greg	1.1	#include "color.h"
11	greg	1.5	#include "resolu.h"
12	greg	1.1
13	greg	1.5	int order; /* input orientation */
14			int xres, yres; /* resolution (scanlen, nscans) */
15
16	greg	1.1	long scanpos; / scanline positions */
17
18	greg	1.5	int fhoriz=0, fvert=0; /* flip flags */
19	greg	1.1
20	greg	1.5	int correctorder = 0; /* correcting orientation? */
21
22	greg	1.1	FILE fin; / input file */
23
24			char *progname;
25
26	greg	2.2
27	schorsch	2.8	static void memerr(void);
28			static void scanfile(void);
29			static void flip(void);
30
31
32			static int
33			neworder(void) /* figure out new order from old */
34	greg	1.5	{
35			register int no;
36
37			if (correctorder)
38			return(order); /* just leave it */
39			if ((no = order) & YMAJOR) {
40			if (fhoriz) no ^= XDECR;
41			if (fvert) no ^= YDECR;
42			} else {
43			if (fhoriz) no ^= YDECR;
44			if (fvert) no ^= XDECR;
45			}
46			return(no);
47			}
48
49	schorsch	2.8	int
50			main(
51			int argc,
52			char *argv[]
53			)
54	greg	1.1	{
55	greg	2.11	static char picfmt[MAXFMTLEN] = PICFMT;
56	greg	2.4	int i, rval;
57	schorsch	2.6	SET_DEFAULT_BINARY();
58			SET_FILE_BINARY(stdout);
59	greg	1.1	progname = argv[0];
60
61			for (i = 1; i < argc; i++)
62			if (!strcmp(argv[i], "-h"))
63			fhoriz++;
64			else if (!strcmp(argv[i], "-v"))
65			fvert++;
66	greg	1.5	else if (!strcmp(argv[i], "-c"))
67			correctorder++;
68	greg	1.1	else
69			break;
70	greg	2.10	if (i < argc-2)
71			goto userr;
72			if (!fhoriz && !fvert)
73			fprintf(stderr, "%s: warning - no operation\n", argv[0]);
74	greg	1.1	if (i >= argc \|\| argv[i][0] == '-') {
75	greg	2.10	if (fvert)
76			goto userr;
77			SET_FILE_BINARY(stdin);
78			fin = stdin;
79			} else if ((fin = fopen(argv[i], "r")) == NULL) {
80	greg	2.9	fprintf(stderr, "%s: cannot open\n", argv[i]);
81	greg	1.1	exit(1);
82			}
83			if (i < argc-1 && freopen(argv[i+1], "w", stdout) == NULL) {
84			fprintf(stderr, "%s: cannot open\n", argv[i+1]);
85			exit(1);
86			}
87			/* transfer header */
88	greg	2.4	if ((rval = checkheader(fin, picfmt, stdout)) < 0) {
89	greg	1.4	fprintf(stderr, "%s: input not a Radiance picture\n",
90			progname);
91			exit(1);
92			}
93	greg	2.4	if (rval)
94			fputformat(picfmt, stdout);
95	greg	1.1	/* add new header info. */
96	greg	1.2	printargs(i, argv, stdout);
97	greg	1.1	putchar('\n');
98			/* get picture size */
99	greg	1.5	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
100	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
101			exit(1);
102			}
103			/* write new picture size */
104	greg	1.5	fputresolu(neworder(), xres, yres, stdout);
105	greg	1.1	/* goto end if vertical flip */
106			if (fvert)
107			scanfile();
108			flip(); /* flip the image */
109			exit(0);
110	greg	2.10	userr:
111			fprintf(stderr, "Usage: %s [-h][-v][-c] infile [outfile]\n",
112			progname);
113			exit(1);
114	greg	1.1	}
115
116
117	schorsch	2.8	static void
118			memerr(void)
119	greg	1.1	{
120			fprintf(stderr, "%s: out of memory\n", progname);
121			exit(1);
122			}
123
124
125	schorsch	2.8	static void
126			scanfile(void) /* scan to the end of file */
127	greg	1.1	{
128			extern long ftell();
129			COLR *scanin;
130			int y;
131
132			if ((scanpos = (long )malloc(yressizeof(long))) == NULL)
133			memerr();
134			if ((scanin = (COLR )malloc(xressizeof(COLR))) == NULL)
135			memerr();
136	greg	2.3	for (y = yres-1; y > 0; y--) {
137	greg	1.1	scanpos[y] = ftell(fin);
138			if (freadcolrs(scanin, xres, fin) < 0) {
139			fprintf(stderr, "%s: read error\n", progname);
140			exit(1);
141			}
142			}
143	greg	2.3	scanpos[0] = ftell(fin);
144	greg	2.5	free((void *)scanin);
145	greg	1.1	}
146
147
148	schorsch	2.8	static void
149			flip(void) /* flip the picture */
150	greg	1.1	{
151			COLR scanin, scanout;
152			int y;
153			register int x;
154
155			if ((scanin = (COLR )malloc(xressizeof(COLR))) == NULL)
156			memerr();
157			if (fhoriz) {
158			if ((scanout = (COLR )malloc(xressizeof(COLR))) == NULL)
159			memerr();
160			} else
161			scanout = scanin;
162			for (y = yres-1; y >= 0; y--) {
163			if (fvert && fseek(fin, scanpos[yres-1-y], 0) == EOF) {
164			fprintf(stderr, "%s: seek error\n", progname);
165			exit(1);
166			}
167			if (freadcolrs(scanin, xres, fin) < 0) {
168			fprintf(stderr, "%s: read error\n", progname);
169			exit(1);
170			}
171			if (fhoriz)
172			for (x = 0; x < xres; x++)
173			copycolr(scanout[x], scanin[xres-1-x]);
174			if (fwritecolrs(scanout, xres, stdout) < 0) {
175			fprintf(stderr, "%s: write error\n", progname);
176			exit(1);
177			}
178			}
179	greg	2.5	free((void *)scanin);
180	greg	2.3	if (fhoriz)
181	greg	2.5	free((void *)scanout);
182	greg	1.1	}