diff options
Diffstat (limited to 'libtiff/mkspans.c')
-rw-r--r-- | libtiff/mkspans.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libtiff/mkspans.c b/libtiff/mkspans.c new file mode 100644 index 00000000..43e8f98f --- /dev/null +++ b/libtiff/mkspans.c @@ -0,0 +1,72 @@ +/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/mkspans.c,v 1.1 1999-07-27 21:50:27 mike Exp $ */ + +/* + * Copyright (c) 1991-1997 Sam Leffler + * Copyright (c) 1991-1997 Silicon Graphics, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that (i) the above copyright notices and this permission notice appear in + * all copies of the software and related documentation, and (ii) the names of + * Sam Leffler and Silicon Graphics may not be used in any advertising or + * publicity relating to the software without the specific, prior written + * permission of Sam Leffler and Silicon Graphics. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR + * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include "tiffcomp.h" + +/* + * Hack program to construct tables used to find + * runs of zeros and ones in Group 3 Fax encoding. + */ + +dumparray(name, runs) + char *name; + unsigned char runs[256]; +{ + register int i; + register char *sep; + printf("static u_char %s[256] = {\n", name); + sep = " "; + for (i = 0; i < 256; i++) { + printf("%s%d", sep, runs[i]); + if (((i + 1) % 16) == 0) { + printf(", /* 0x%02x - 0x%02x */\n", i-15, i); + sep = " "; + } else + sep = ", "; + } + printf("\n};\n"); +} + +main() +{ + unsigned char runs[2][256]; + + memset(runs[0], 0, 256*sizeof (char)); + memset(runs[1], 0, 256*sizeof (char)); + { register int run, runlen, i; + runlen = 1; + for (run = 0x80; run != 0xff; run = (run>>1)|0x80) { + for (i = run-1; i >= 0; i--) { + runs[1][run|i] = runlen; + runs[0][(~(run|i)) & 0xff] = runlen; + } + runlen++; + } + runs[1][0xff] = runs[0][0] = 8; + } + dumparray("bruns", runs[0]); + dumparray("wruns", runs[1]); +} |