58 lines
1.1 KiB
Bash
58 lines
1.1 KiB
Bash
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#!/bin/sh
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#set -x
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. ./variables.sh
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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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#
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# use bc since bash does not support fp math
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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 "difference is $dif"
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exit 1
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fi
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}
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test_rotate() {
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im=$1
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inter=$2
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echo -n "testing $inter ... "
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# 90 degree clockwise rotate
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trn="0 1 1 0"
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vips affine $im $tmp/t1.v "$trn" --interpolate $inter
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vips affine $tmp/t1.v $tmp/t2.v "$trn" --interpolate $inter
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vips affine $tmp/t2.v $tmp/t1.v "$trn" --interpolate $inter
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vips affine $tmp/t1.v $tmp/t2.v "$trn" --interpolate $inter
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test_difference $im $tmp/t2.v 1
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echo "ok"
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}
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# vsqbs is non-interpolatory, don't test this way
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echo "testing with $(basename $image)"
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for i in nearest bicubic bilinear nohalo lbb; do
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test_rotate $image $i
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done
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