mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 05:50:10 +01:00
85 lines
3 KiB
Bash
85 lines
3 KiB
Bash
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#!/bin/bash
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# This script can be used to update the reference images using certain
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# test results as a baseline.
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#
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# Our test suite expects nearly pixel-perfection, but in some cases we
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# give the renderer some flexibility and so these cases will show up as
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# test failures. So, this script can be used to do a visual check and
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# if they "look" ok, to go ahead and update the reference image by
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# copying the test output.
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#
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# NOTE: When adding to this file, make sure to thoroughly document the
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# rationale when and why the existing reference images can be updated
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# from regular test output, such that people other than you can
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# intelligently keep the test reference images updated.
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if [ ! -d output ] || [ ! -d reference ]; then
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echo "This script must be run in cairo's test directory after the full testsuite has been run."
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exit
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fi
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PDIFF="./pdiff/perceptualdiff"
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# Returns 1 if images are different, 0 if they're essentially identical
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images_differ() {
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# Check if bytewise identical
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if cmp --silent "${1}" "${2}"; then
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# Images are identical
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return 0
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fi
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# Run perceptualdiff with minimum threshold
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pdiff_output=$($PDIFF "${1}" "${2}" -threshold 1)
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result=${pdiff_output%:*}
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notes=$(echo "${pdiff_output#*: }" | tail -n 1)
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if [ "$result" = "PASS" ] && [ "$notes" = "Images are binary identical" ]; then
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return 0
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fi
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return 1
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}
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# ----------------------------------------------------------------------
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# pixman-downscale images
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#
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# The *-95 tests check rendering at a difficult to downsize dimension.
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# The border pixels between different colored areas can be blurred in
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# different ways resulting in some color variation that is acceptable
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# but throws off the testsuite. So a visual check is sufficient to
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# verify the results aren't crazily off.
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# Use the ARGB32 format of the image file as the main reference
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for file in $(ls ./output/pixman-downscale-*-95.image.argb32.out.png); do
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dest=$(basename ${file/.image.argb32.out./.ref.})
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echo "$file -> ./reference/${dest}"
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cp $file ./reference/${dest}
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done
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echo
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# If the ARGB32 format of a given backend's file differs from the main reference,
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# then use it as the backend reference
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for file in $(ls ./output/pixman-downscale-*-95.*.argb32.out.png); do
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ref=$(basename ${file/-95.*.argb32.out.png/-95.ref.png})
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if ! images_differ "./reference/${ref}" "${file}"; then
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dest=$(basename ${file/.argb32.out.png/.ref.png})
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echo "${file} -> ./reference/${dest}"
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cp ${file} ./reference/${dest}
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fi
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done
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echo
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# If the RGB24 format differs from existing ref image, then use it as a ref.
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for file in $(ls ./output/pixman-downscale-*-95.*.rgb24.out.png); do
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ref=$(basename ${file/.rgb24.out.png/.ref.png})
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if [ ! -e "./reference/${ref}" ]; then
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ref=$(basename ${file/-95.*.rgb24.out.png/-95.ref.png})
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fi
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if ! images_differ "./reference/${ref}" "${file}"; then
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dest=$(basename ${file/.rgb24.out.png/.rgb24.ref.png})
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echo "${file} -> ./reference/${dest}"
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cp ${file} ./reference/${dest}
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fi
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done
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