New upstream version 5.3.1

1 files changed, 68 insertions, 0 deletions

diff --git a/test/compress-6level.sh.in b/test/compress-6level.sh.in
new file mode 100644
index 0000000..62bc38a
--- /dev/null
+++ b/test/compress-6level.sh.in
@@ -0,0 +1,68 @@
+#!@SHELL@
+
+# compression of 6-level inks (irrespective of bits per level)
+# 3-level, 5 pixels = 1024 combinations: 10 bits long
+# but since not all levels used: unique are 242, or 1 byte
+# 4-level, 4 pixels = 65536 combinations: 16 bits long
+# but since only 2 bits per pixel used there are 256 combinations, or 1 byte
+# 5-level, 3 pixels: 15 bits long
+# but since only 3 bits per pixel used there are 125 unique combinations, or 1 byte
+# 6-level, 3 pixels: 15 bits long
+# but since only 3 bits per pixel used there are 216 unique combinations, or 1 byte
+
+
+# m: max number of levels used
+m=6
+# z: max number allowed by bits
+z=16
+# a: iteration of array subscript
+a=1
+# n: iteration of valid combinations
+n=0
+# iteration of pixels
+#i=0
+j=0
+k=0
+l=0
+
+echo "static const unsigned char ninetoeight2[] ="
+echo "{"
+
+#for (( i=1; i<=$z; i++ ))
+#do
+    for (( j=1; j<=$z; j++ ))
+    do
+	for (( k=1; k<=$z; k++ ))
+	do
+	    for (( l=1; l<=$z; l++ ))
+	    do
+#		if test $i -gt $m -o $j -gt $m -o $k -gt $m -o $l -gt $m
+		if test $j -gt $m -o $k -gt $m -o $l -gt $m
+		then
+		    array[$a]=0
+		else
+		    array[$a]=$n
+		    n=$(( $n+1 ))
+		fi
+		# print line of output
+		remainder=$(( $a % 16 ))
+		a=$(( $a+1 ))
+		if test $remainder -eq 0
+		then
+		    printf "  "
+		    pstart=$(( 256*($j-1)+16*($k-1)+1 ))
+		    pfinal=$(( 256*($j-1)+16*$k ))
+		    #echo "array subscript: $a, pstart: $pstart, pfinal: $pfinal, iterators: $j $k $l"
+		    for (( p=$pstart; p<=$pfinal; p++ ))
+		    do
+			printf "%3d," ${array[$p]}
+		    done
+		    printf "\n"
+		fi
+	    done
+	done
+    done
+#done
+
+echo "};"
+echo "max number of valid combinations: $n"