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#! /bin/sh
# 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"
. ${srcdir}/test-invalid.inc
invCmd "pamditherbw -fs -atkinson ${test_red}"
invCmd "pamditherbw -floyd -atkinson ${test_red}"
invCmd "pamditherbw -dither8 -cluster3 ${test_red}"
invCmd "pamditherbw -cluster3 -cluster4 ${test_red}"
invCmd "pamditherbw -cluster3 -cluster8 ${test_red}"
invCmd "pamditherbw -cluster4 -cluster8 ${test_red}"
invCmd "pamditherbw -hilbert -threshold ${test_red}"
invCmd "pamditherbw -clump=8 ${test_red}"
invCmd "pamditherbw -fs -clump=8 ${test_red}"
invCmd "pamditherbw -hilbert -clump=1 ${test_red}"
invCmd "pamditherbw -th -value=-1 ${test_red}"
invCmd "pamditherbw -th -value=1.1 ${test_red}"
rm ${test_red}
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