src/px/protate.c

#ifndef lint
static const char       RCSid[] = "$Id: protate.c,v 2.8 2003/05/15 05:13:35 greg Exp $";
#endif
/*
 * prot.c - program to rotate picture file 90 degrees clockwise.
 *
 *      2/26/88
 */

#include "standard.h"

#include "color.h"

#include <time.h>

#include "resolu.h"

int     order;                          /* input scanline order */
int     xres, yres;                     /* input resolution */

int     correctorder = 0;               /* order correction? */
int     ccw = 0;                        /* rotate CCW? */

#ifdef SMLMEM
char    buf[1<<20];                     /* output buffer */
#else
char    buf[1<<22];                     /* output buffer */
#endif

int     nrows;                          /* number of rows output at once */

#define scanbar         ((COLR *)buf)

char    *progname;

short   ordertab[4][2] = {
        {0,XDECR}, {XDECR,XDECR|YDECR}, {XDECR|YDECR,YDECR}, {YDECR,0}
};

static int neworder(void);
static void rotatecw(FILE *fp);
static void rotateccw(FILE *fp);


static int
neworder(void)          /* return corrected order */
{
        register int    i;

        if (correctorder)
                return(order);
        for (i = 4; i--; )
                if ((order&~YMAJOR) == ordertab[i][ccw])
                        return(ordertab[i][1-ccw] | ((order&YMAJOR)^YMAJOR));
        fputs("Order botch!\n", stderr);
        exit(2);
}

int
main(
        int     argc,
        char    *argv[]
)
{
        static char     picfmt[LPICFMT+1] = PICFMT;
        int     rval;
        FILE    *fin;

        progname = argv[0];

        while (argc > 2 && argv[1][0] == '-') {
                switch (argv[1][1]) {
                case 'c':
                        correctorder = 1;
                        break;
                case 'r':
                        ccw = 1;
                        break;
                default:
                        goto userr;
                }
                argc--; argv++;
        }
        if (argc != 2 && argc != 3)
                goto userr;
        if ((fin = fopen(argv[1], "r")) == NULL) {
                fprintf(stderr, "%s: cannot open\n", argv[1]);
                exit(1);
        }
        if (argc == 3 && freopen(argv[2], "w", stdout) == NULL) {
                fprintf(stderr, "%s: cannot open\n", argv[2]);
                exit(1);
        }
                                        /* transfer header */
        if ((rval = checkheader(fin, picfmt, stdout)) < 0) {
                fprintf(stderr, "%s: not a Radiance picture\n", progname);
                exit(1);
        }
        if (rval)
                fputformat(picfmt, stdout);
                                        /* add new header info. */
        fputs(progname, stdout);
        if (ccw) fputs(" -r", stdout);
        if (correctorder) fputs(" -c", stdout);
        fputs("\n\n", stdout);
                                        /* 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(), yres, xres, stdout);
                                        /* compute buffer capacity */
        nrows = sizeof(buf)/sizeof(COLR)/yres;
        if (ccw)                        /* rotate the image */
                rotateccw(fin);
        else
                rotatecw(fin);
        exit(0);
userr:
        fprintf(stderr, "Usage: %s [-r][-c] infile [outfile]\n", progname);
        exit(1);
}


static void
rotatecw(                       /* rotate picture clockwise */
        FILE    *fp
)
{
        register COLR   *inln;
        register int    xoff, inx, iny;
        long    start, ftell();

        if ((inln = (COLR *)malloc(xres*sizeof(COLR))) == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                exit(1);
        }
        start = ftell(fp);
        for (xoff = 0; xoff < xres; xoff += nrows) {
                if (fseek(fp, start, 0) < 0) {
                        fprintf(stderr, "%s: seek error\n", progname);
                        exit(1);
                }
                for (iny = yres-1; iny >= 0; iny--) {
                        if (freadcolrs(inln, xres, fp) < 0) {
                                fprintf(stderr, "%s: read error\n", progname);
                                exit(1);
                        }
                        for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
                                copycolr(scanbar[inx*yres+iny],
                                                inln[xoff+inx]);
                }
                for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
                        if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
                                fprintf(stderr, "%s: write error\n", progname);
                                exit(1);
                        }
        }
        free((void *)inln);
}


static void
rotateccw(                      /* rotate picture counter-clockwise */
        FILE    *fp
)
{
        register COLR   *inln;
        register int    xoff, inx, iny;
        long    start, ftell();

        if ((inln = (COLR *)malloc(xres*sizeof(COLR))) == NULL) {
                fprintf(stderr, "%s: out of memory\n", progname);
                exit(1);
        }
        start = ftell(fp);
        for (xoff = xres-1; xoff >= 0; xoff -= nrows) {
                if (fseek(fp, start, 0) < 0) {
                        fprintf(stderr, "%s: seek error\n", progname);
                        exit(1);
                }
                for (iny = 0; iny < yres; iny++) {
                        if (freadcolrs(inln, xres, fp) < 0) {
                                fprintf(stderr, "%s: read error\n", progname);
                                exit(1);
                        }
                        for (inx = 0; inx < nrows && xoff-inx >= 0; inx++)
                                copycolr(scanbar[inx*yres+iny],
                                                inln[xoff-inx]);
                }
                for (inx = 0; inx < nrows && xoff-inx >= 0; inx++)
                        if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
                                fprintf(stderr, "%s: write error\n", progname);
                                exit(1);
                        }
        }
        free((void *)inln);
}
Revision:	2.9
Committed:	Sun Mar 28 20:33:14 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.8:	+21 -11 lines
Log Message:	Continued ANSIfication, and other fixes and clarifications.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.9	static const char RCSid[] = "$Id: protate.c,v 2.8 2003/05/15 05:13:35 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* prot.c - program to rotate picture file 90 degrees clockwise.
6			*
7			* 2/26/88
8			*/
9
10	greg	1.7	#include "standard.h"
11	greg	1.1
12			#include "color.h"
13
14	greg	2.7	#include <time.h>
15
16	greg	1.9	#include "resolu.h"
17
18			int order; /* input scanline order */
19	greg	1.1	int xres, yres; /* input resolution */
20
21	greg	1.9	int correctorder = 0; /* order correction? */
22	gwlarson	2.5	int ccw = 0; /* rotate CCW? */
23	greg	1.9
24	greg	2.8	#ifdef SMLMEM
25			char buf[1<<20]; /* output buffer */
26			#else
27	greg	2.2	char buf[1<<22]; /* output buffer */
28			#endif
29	greg	1.1
30			int nrows; /* number of rows output at once */
31
32			#define scanbar ((COLR *)buf)
33
34			char *progname;
35
36	gwlarson	2.5	short ordertab[4][2] = {
37			{0,XDECR}, {XDECR,XDECR\|YDECR}, {XDECR\|YDECR,YDECR}, {YDECR,0}
38			};
39	greg	1.1
40	schorsch	2.9	static int neworder(void);
41			static void rotatecw(FILE *fp);
42			static void rotateccw(FILE *fp);
43	greg	1.8
44	schorsch	2.9
45
46			static int
47			neworder(void) /* return corrected order */
48	gwlarson	2.5	{
49			register int i;
50
51			if (correctorder)
52			return(order);
53			for (i = 4; i--; )
54			if ((order&~YMAJOR) == ordertab[i][ccw])
55			return(ordertab[i][1-ccw] \| ((order&YMAJOR)^YMAJOR));
56			fputs("Order botch!\n", stderr);
57			exit(2);
58			}
59
60	schorsch	2.9	int
61			main(
62			int argc,
63			char *argv[]
64			)
65	greg	1.1	{
66	greg	2.4	static char picfmt[LPICFMT+1] = PICFMT;
67			int rval;
68	greg	1.1	FILE *fin;
69
70			progname = argv[0];
71
72	gwlarson	2.5	while (argc > 2 && argv[1][0] == '-') {
73			switch (argv[1][1]) {
74			case 'c':
75			correctorder = 1;
76			break;
77			case 'r':
78			ccw = 1;
79			break;
80			default:
81			goto userr;
82			}
83	greg	1.9	argc--; argv++;
84			}
85	gwlarson	2.5	if (argc != 2 && argc != 3)
86			goto userr;
87	greg	1.1	if ((fin = fopen(argv[1], "r")) == NULL) {
88			fprintf(stderr, "%s: cannot open\n", argv[1]);
89			exit(1);
90			}
91			if (argc == 3 && freopen(argv[2], "w", stdout) == NULL) {
92			fprintf(stderr, "%s: cannot open\n", argv[2]);
93			exit(1);
94			}
95	greg	1.6	/* transfer header */
96	greg	2.4	if ((rval = checkheader(fin, picfmt, stdout)) < 0) {
97	greg	1.9	fprintf(stderr, "%s: not a Radiance picture\n", progname);
98	greg	1.8	exit(1);
99			}
100	greg	2.4	if (rval)
101			fputformat(picfmt, stdout);
102	greg	1.1	/* add new header info. */
103	gwlarson	2.5	fputs(progname, stdout);
104			if (ccw) fputs(" -r", stdout);
105			if (correctorder) fputs(" -c", stdout);
106			fputs("\n\n", stdout);
107	greg	1.1	/* get picture size */
108	greg	1.9	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
109	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
110			exit(1);
111			}
112			/* write new picture size */
113	greg	1.9	fputresolu(neworder(), yres, xres, stdout);
114	greg	1.1	/* compute buffer capacity */
115			nrows = sizeof(buf)/sizeof(COLR)/yres;
116	gwlarson	2.5	if (ccw) /* rotate the image */
117			rotateccw(fin);
118			else
119			rotatecw(fin);
120	greg	1.1	exit(0);
121	gwlarson	2.5	userr:
122			fprintf(stderr, "Usage: %s [-r][-c] infile [outfile]\n", progname);
123			exit(1);
124	greg	1.1	}
125
126
127	schorsch	2.9	static void
128			rotatecw( /* rotate picture clockwise */
129			FILE *fp
130			)
131	greg	1.1	{
132	greg	1.5	register COLR *inln;
133	greg	1.1	register int xoff, inx, iny;
134			long start, ftell();
135
136	greg	1.5	if ((inln = (COLR )malloc(xressizeof(COLR))) == NULL) {
137	greg	1.1	fprintf(stderr, "%s: out of memory\n", progname);
138			exit(1);
139			}
140			start = ftell(fp);
141			for (xoff = 0; xoff < xres; xoff += nrows) {
142			if (fseek(fp, start, 0) < 0) {
143			fprintf(stderr, "%s: seek error\n", progname);
144			exit(1);
145			}
146			for (iny = yres-1; iny >= 0; iny--) {
147	greg	1.5	if (freadcolrs(inln, xres, fp) < 0) {
148	greg	1.1	fprintf(stderr, "%s: read error\n", progname);
149			exit(1);
150			}
151			for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
152	gwlarson	2.6	copycolr(scanbar[inx*yres+iny],
153			inln[xoff+inx]);
154	greg	1.1	}
155			for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
156	gwlarson	2.5	if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
157			fprintf(stderr, "%s: write error\n", progname);
158			exit(1);
159			}
160			}
161	greg	2.7	free((void *)inln);
162	gwlarson	2.5	}
163
164
165	schorsch	2.9	static void
166			rotateccw( /* rotate picture counter-clockwise */
167			FILE *fp
168			)
169	gwlarson	2.5	{
170			register COLR *inln;
171			register int xoff, inx, iny;
172			long start, ftell();
173
174			if ((inln = (COLR )malloc(xressizeof(COLR))) == NULL) {
175			fprintf(stderr, "%s: out of memory\n", progname);
176			exit(1);
177			}
178			start = ftell(fp);
179			for (xoff = xres-1; xoff >= 0; xoff -= nrows) {
180			if (fseek(fp, start, 0) < 0) {
181			fprintf(stderr, "%s: seek error\n", progname);
182			exit(1);
183			}
184			for (iny = 0; iny < yres; iny++) {
185			if (freadcolrs(inln, xres, fp) < 0) {
186			fprintf(stderr, "%s: read error\n", progname);
187			exit(1);
188			}
189			for (inx = 0; inx < nrows && xoff-inx >= 0; inx++)
190	gwlarson	2.6	copycolr(scanbar[inx*yres+iny],
191			inln[xoff-inx]);
192	gwlarson	2.5	}
193			for (inx = 0; inx < nrows && xoff-inx >= 0; inx++)
194	greg	1.1	if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
195			fprintf(stderr, "%s: write error\n", progname);
196			exit(1);
197			}
198			}
199	greg	2.7	free((void *)inln);
200	greg	1.1	}