Initial import

git-svn-id: http://moon:8086/svn/software/trunk/libsrc/libtiff_2007@1 b431acfa-c32f-4a4a-93f1-934dc6c82436
2014-07-19 07:44:42 +00:00
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+/* $Header: /home/cvsroot/libtiff/libtiff/mkspans.c,v 1.1.1.1 2000/06/24 19:10:16 tshead 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]);
+}