55 lines
1.2 KiB
Bash
55 lines
1.2 KiB
Bash
top_srcdir=@TOP_SRCDIR@
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PYTHON=@PYTHON@
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# we need a different tmp for each script since make can run tests in parallel
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tmp=$top_srcdir/test/tmp-$$
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test_images=$top_srcdir/test/test-suite/images
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image=$test_images/sample.jpg
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mkdir -p $tmp
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vips=$top_srcdir/tools/vips
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vipsthumbnail=$top_srcdir/tools/vipsthumbnail
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vipsheader=$top_srcdir/tools/vipsheader
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# we need bc to use '.' for a decimal separator
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export LC_NUMERIC=C
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# raspbian sets this too, annoyingly
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unset LC_ALL
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# test for file format supported
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test_supported() {
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format=$1
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if $vips $format > /dev/null 2>&1; then
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result=0
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else
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echo "support for $format not configured, skipping test"
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result=1
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fi
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return $result
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}
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# is a difference beyond a threshold? return 0 (meaning all ok) or 1 (meaning
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# error, or outside threshold)
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break_threshold() {
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diff=$1
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threshold=$2
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return $(echo "$diff <= $threshold" | bc -l)
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}
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# subtract, look for max difference less than a threshold
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test_difference() {
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before=$1
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after=$2
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threshold=$3
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$vips subtract $before $after $tmp/difference.v
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$vips abs $tmp/difference.v $tmp/abs.v
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dif=$($vips max $tmp/abs.v)
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if break_threshold $dif $threshold; then
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echo "save / load difference is $dif"
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exit 1
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fi
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}
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