#! /bin/bash
# This script tests: pamditherbw
# Also requires: pamchannel pamtopnm

tmpdir=${tmpdir:-/tmp}
test_red=${tmpdir}/testimg.red

# Test 1.  Simple threshold
echo "Test: simple threshold"

pamchannel -infile=testimg.ppm -tupletype="GRAYSCALE" 0 | pamtopnm | \
  tee ${test_red} | \
  pamditherbw -threshold -val=0.5 | cksum


# Test 2. Hilbert
echo "Test: Hilbert"
pamditherbw -hilbert ${test_red} | cksum
pamditherbw -hilbert -clump=4   ${test_red} | cksum
pamditherbw -hilbert -clump=16  ${test_red} | cksum
pamditherbw -hilbert -clump=100 ${test_red} | cksum

# Test 3. Dither-8
echo "Test: Dither-8"
pamditherbw -dither8 ${test_red} | cksum

# Test 4. Cluster-3
echo "Test: Cluster-3"
pamditherbw -cluster4 ${test_red} | cksum

# Test 5. Cluster-4
echo "Test: Cluster-4"
pamditherbw -cluster4 ${test_red} | cksum

# Test 6. Cluster-8
echo "Test: Cluster-8"
pamditherbw -cluster8 ${test_red} | cksum


echo "Test: Invalid"

test_out=${tmpdir}/test_out

echo 1>&2
echo "Invalid command-line argument combinations." 1>&2
echo "Error messages should appear below the line." 1>&2
echo "-----------------------------------------------------------" 1>&2

pamditherbw -fs -atkinson       ${test_red} > ${test_out} || \
 echo -n "Expected failure 1"; test -s ${test_out}; echo " "$?
pamditherbw -floyd -atkinson    ${test_red} > ${test_out} || \
 echo -n "Expected failure 2"; test -s ${test_out}; echo " "$?
pamditherbw -dither8  -cluster3 ${test_red} > ${test_out} || \
 echo -n "Expected failure 3"; test -s ${test_out}; echo " "$?
pamditherbw -cluster3 -cluster4 ${test_red} > ${test_out} || \
 echo -n "Expected failure 4"; test -s ${test_out}; echo " "$?
pamditherbw -cluster3 -cluster8 ${test_red} > ${test_out} || \
 echo -n "Expected failure 5"; test -s ${test_out}; echo " "$?
pamditherbw -cluster4 -cluster8 ${test_red} > ${test_out} || \
 echo -n "Expected failure 6"; test -s ${test_out}; echo " "$?
pamditherbw -hilbert -threshold ${test_red} > ${test_out} || \
 echo -n "Expected failure 7"; test -s ${test_out}; echo " "$?
pamditherbw -clump=8            ${test_red} > ${test_out} || \
 echo -n "Expected failure 8"; test -s ${test_out}; echo " "$?
pamditherbw -fs -clump=8        ${test_red} > ${test_out} || \
 echo -n "Expected failure 9"; test -s ${test_out}; echo " "$?
pamditherbw -hilbert -clump=1   ${test_red} > ${test_out} || \
 echo -n "Expected failure 10"; test -s ${test_out}; echo " "$?
pamditherbw -th -value=-1       ${test_red} > ${test_out} || \
 echo -n "Expected failure 11"; test -s ${test_out}; echo " "$?
pamditherbw -th -value=1.1      ${test_red} > ${test_out} || \
 echo -n "Expected failure 12"; test -s ${test_out}; echo " "$?

rm ${test_red} ${test_out}