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#ifndef lint |
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static const char RCSid[] = "$Id: protate.c,v 2.8 2003/05/15 05:13:35 greg Exp $"; |
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#endif |
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/* |
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* prot.c - program to rotate picture file 90 degrees clockwise. |
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* |
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* 2/26/88 |
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*/ |
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|
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#include "standard.h" |
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|
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#include "color.h" |
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|
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#include <time.h> |
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|
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#include "resolu.h" |
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|
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int order; /* input scanline order */ |
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int xres, yres; /* input resolution */ |
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|
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int correctorder = 0; /* order correction? */ |
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int ccw = 0; /* rotate CCW? */ |
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|
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#ifdef SMLMEM |
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char buf[1<<20]; /* output buffer */ |
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#else |
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char buf[1<<22]; /* output buffer */ |
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#endif |
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|
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int nrows; /* number of rows output at once */ |
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|
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#define scanbar ((COLR *)buf) |
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|
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char *progname; |
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|
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short ordertab[4][2] = { |
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{0,XDECR}, {XDECR,XDECR|YDECR}, {XDECR|YDECR,YDECR}, {YDECR,0} |
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}; |
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|
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static int neworder(void); |
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static void rotatecw(FILE *fp); |
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static void rotateccw(FILE *fp); |
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|
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|
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|
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static int |
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neworder(void) /* return corrected order */ |
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{ |
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register int i; |
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|
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if (correctorder) |
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return(order); |
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for (i = 4; i--; ) |
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if ((order&~YMAJOR) == ordertab[i][ccw]) |
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return(ordertab[i][1-ccw] | ((order&YMAJOR)^YMAJOR)); |
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fputs("Order botch!\n", stderr); |
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exit(2); |
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} |
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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static char picfmt[LPICFMT+1] = PICFMT; |
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int rval; |
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FILE *fin; |
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|
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progname = argv[0]; |
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|
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while (argc > 2 && argv[1][0] == '-') { |
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switch (argv[1][1]) { |
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case 'c': |
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correctorder = 1; |
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break; |
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case 'r': |
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ccw = 1; |
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break; |
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default: |
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goto userr; |
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} |
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argc--; argv++; |
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} |
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if (argc != 2 && argc != 3) |
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goto userr; |
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if ((fin = fopen(argv[1], "r")) == NULL) { |
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fprintf(stderr, "%s: cannot open\n", argv[1]); |
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exit(1); |
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} |
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if (argc == 3 && freopen(argv[2], "w", stdout) == NULL) { |
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fprintf(stderr, "%s: cannot open\n", argv[2]); |
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exit(1); |
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} |
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/* transfer header */ |
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if ((rval = checkheader(fin, picfmt, stdout)) < 0) { |
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fprintf(stderr, "%s: not a Radiance picture\n", progname); |
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exit(1); |
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} |
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if (rval) |
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fputformat(picfmt, stdout); |
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/* add new header info. */ |
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fputs(progname, stdout); |
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if (ccw) fputs(" -r", stdout); |
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if (correctorder) fputs(" -c", stdout); |
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fputs("\n\n", stdout); |
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/* get picture size */ |
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if ((order = fgetresolu(&xres, &yres, fin)) < 0) { |
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fprintf(stderr, "%s: bad picture size\n", progname); |
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exit(1); |
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} |
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/* write new picture size */ |
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fputresolu(neworder(), yres, xres, stdout); |
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/* compute buffer capacity */ |
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nrows = sizeof(buf)/sizeof(COLR)/yres; |
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if (ccw) /* rotate the image */ |
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rotateccw(fin); |
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else |
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rotatecw(fin); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-r][-c] infile [outfile]\n", progname); |
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exit(1); |
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} |
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|
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|
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static void |
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rotatecw( /* rotate picture clockwise */ |
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FILE *fp |
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) |
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{ |
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register COLR *inln; |
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register int xoff, inx, iny; |
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long start, ftell(); |
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|
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if ((inln = (COLR *)malloc(xres*sizeof(COLR))) == NULL) { |
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fprintf(stderr, "%s: out of memory\n", progname); |
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exit(1); |
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} |
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start = ftell(fp); |
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for (xoff = 0; xoff < xres; xoff += nrows) { |
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if (fseek(fp, start, 0) < 0) { |
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fprintf(stderr, "%s: seek error\n", progname); |
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exit(1); |
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} |
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for (iny = yres-1; iny >= 0; iny--) { |
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if (freadcolrs(inln, xres, fp) < 0) { |
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fprintf(stderr, "%s: read error\n", progname); |
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exit(1); |
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} |
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for (inx = 0; inx < nrows && xoff+inx < xres; inx++) |
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copycolr(scanbar[inx*yres+iny], |
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inln[xoff+inx]); |
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} |
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for (inx = 0; inx < nrows && xoff+inx < xres; inx++) |
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if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) { |
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fprintf(stderr, "%s: write error\n", progname); |
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exit(1); |
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} |
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} |
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free((void *)inln); |
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} |
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|
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|
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static void |
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rotateccw( /* rotate picture counter-clockwise */ |
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FILE *fp |
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) |
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{ |
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register COLR *inln; |
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register int xoff, inx, iny; |
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long start, ftell(); |
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|
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if ((inln = (COLR *)malloc(xres*sizeof(COLR))) == NULL) { |
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fprintf(stderr, "%s: out of memory\n", progname); |
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exit(1); |
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} |
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start = ftell(fp); |
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for (xoff = xres-1; xoff >= 0; xoff -= nrows) { |
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if (fseek(fp, start, 0) < 0) { |
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fprintf(stderr, "%s: seek error\n", progname); |
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exit(1); |
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} |
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for (iny = 0; iny < yres; iny++) { |
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if (freadcolrs(inln, xres, fp) < 0) { |
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fprintf(stderr, "%s: read error\n", progname); |
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exit(1); |
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} |
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for (inx = 0; inx < nrows && xoff-inx >= 0; inx++) |
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copycolr(scanbar[inx*yres+iny], |
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inln[xoff-inx]); |
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} |
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for (inx = 0; inx < nrows && xoff-inx >= 0; inx++) |
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if (fwritecolrs(scanbar+inx*yres, yres, stdout) < 0) { |
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fprintf(stderr, "%s: write error\n", progname); |
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exit(1); |
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} |
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} |
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free((void *)inln); |
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} |
