src/px/protate.c

/* Copyright (c) 1991 Regents of the University of California */

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

/*
 * prot.c - program to rotate picture file 90 degrees clockwise.
 *
 *      2/26/88
 */

#include "standard.h"

#include "color.h"

#include "resolu.h"

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

int     correctorder = 0;               /* order correction? */

char    buf[1<<20];                     /* output buffer */

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

#define scanbar         ((COLR *)buf)

char    *progname;

#define neworder()      (correctorder ? order : \
                        (order^(order&YMAJOR?YDECR:XDECR)^YMAJOR))


main(argc, argv)
int     argc;
char    *argv[];
{
        FILE    *fin;

        progname = argv[0];

        if (argc > 2 && !strcmp(argv[1], "-c")) {
                correctorder++;
                argc--; argv++;
        }
        if (argc != 2 && argc != 3) {
                fprintf(stderr, "Usage: %s [-c] infile [outfile]\n", progname);
                exit(1);
        }
        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 (checkheader(fin, COLRFMT, stdout) < 0) {
                fprintf(stderr, "%s: not a Radiance picture\n", progname);
                exit(1);
        }
                                        /* add new header info. */
        printf("%s\n\n", progname);
                                        /* 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;
        rotate(fin);                    /* rotate the image */
        exit(0);
}


rotate(fp)                      /* rotate picture */
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++)
                                bcopy((char *)inln[xoff+inx],
                                                (char *)scanbar[inx*yres+iny],
                                                sizeof(COLR));
                }
                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((char *)inln);
}
Revision:	1.9
Committed:	Mon Nov 11 14:01:44 1991 UTC (32 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+18 -26 lines
Log Message:	Improved handling of scanline ordering
#	User	Rev	Content
1	greg	1.9	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6	greg	1.9
7	greg	1.1	/*
8			* prot.c - program to rotate picture file 90 degrees clockwise.
9			*
10			* 2/26/88
11			*/
12
13	greg	1.7	#include "standard.h"
14	greg	1.1
15			#include "color.h"
16
17	greg	1.9	#include "resolu.h"
18
19			int order; /* input scanline order */
20	greg	1.1	int xres, yres; /* input resolution */
21
22	greg	1.9	int correctorder = 0; /* order correction? */
23
24	greg	1.1	char buf[1<<20]; /* output buffer */
25
26			int nrows; /* number of rows output at once */
27
28			#define scanbar ((COLR *)buf)
29
30			char *progname;
31
32	greg	1.9	#define neworder() (correctorder ? order : \
33			(order^(order&YMAJOR?YDECR:XDECR)^YMAJOR))
34	greg	1.1
35	greg	1.8
36	greg	1.1	main(argc, argv)
37			int argc;
38			char *argv[];
39			{
40			FILE *fin;
41
42			progname = argv[0];
43
44	greg	1.9	if (argc > 2 && !strcmp(argv[1], "-c")) {
45			correctorder++;
46			argc--; argv++;
47			}
48	greg	1.1	if (argc != 2 && argc != 3) {
49	greg	1.9	fprintf(stderr, "Usage: %s [-c] infile [outfile]\n", progname);
50	greg	1.1	exit(1);
51			}
52			if ((fin = fopen(argv[1], "r")) == NULL) {
53			fprintf(stderr, "%s: cannot open\n", argv[1]);
54			exit(1);
55			}
56			if (argc == 3 && freopen(argv[2], "w", stdout) == NULL) {
57			fprintf(stderr, "%s: cannot open\n", argv[2]);
58			exit(1);
59			}
60	greg	1.6	/* transfer header */
61	greg	1.9	if (checkheader(fin, COLRFMT, stdout) < 0) {
62			fprintf(stderr, "%s: not a Radiance picture\n", progname);
63	greg	1.8	exit(1);
64			}
65	greg	1.1	/* add new header info. */
66			printf("%s\n\n", progname);
67			/* get picture size */
68	greg	1.9	if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
69	greg	1.1	fprintf(stderr, "%s: bad picture size\n", progname);
70			exit(1);
71			}
72			/* write new picture size */
73	greg	1.9	fputresolu(neworder(), yres, xres, stdout);
74	greg	1.1	/* compute buffer capacity */
75			nrows = sizeof(buf)/sizeof(COLR)/yres;
76			rotate(fin); /* rotate the image */
77			exit(0);
78			}
79
80
81			rotate(fp) /* rotate picture */
82			FILE *fp;
83			{
84	greg	1.5	register COLR *inln;
85	greg	1.1	register int xoff, inx, iny;
86			long start, ftell();
87
88	greg	1.5	if ((inln = (COLR )malloc(xressizeof(COLR))) == NULL) {
89	greg	1.1	fprintf(stderr, "%s: out of memory\n", progname);
90			exit(1);
91			}
92			start = ftell(fp);
93			for (xoff = 0; xoff < xres; xoff += nrows) {
94			if (fseek(fp, start, 0) < 0) {
95			fprintf(stderr, "%s: seek error\n", progname);
96			exit(1);
97			}
98			for (iny = yres-1; iny >= 0; iny--) {
99	greg	1.5	if (freadcolrs(inln, xres, fp) < 0) {
100	greg	1.1	fprintf(stderr, "%s: read error\n", progname);
101			exit(1);
102			}
103			for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
104	greg	1.5	bcopy((char *)inln[xoff+inx],
105	greg	1.3	(char )scanbar[inxyres+iny],
106	greg	1.1	sizeof(COLR));
107			}
108			for (inx = 0; inx < nrows && xoff+inx < xres; inx++)
109			if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) {
110			fprintf(stderr, "%s: write error\n", progname);
111			exit(1);
112			}
113			}
114	greg	1.5	free((char *)inln);
115	greg	1.1	}