blob: e5352f20b040fb4868a567db582768ff47732586 [file] [log] [blame]
#!/bin/bash -eu
# Copyright 2023 The Wuffs Authors.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.
# ----------------
# This script checks that Wuffs's JPEG decoder and djpeg (from libjpeg or
# libjpeg-turbo) produce the same output (using djpeg's default configuration,
# with no further command line arguments).
DJPEG_BINARY=${DJPEG_BINARY:-djpeg}
if [ ! -e wuffs-root-directory.txt ]; then
echo "$0 should be run from the Wuffs root directory."
exit 1
elif [ ! -e gen/bin/example-convert-to-nia ]; then
echo "Run \"./build-example.sh example/convert-to-nia\" first."
exit 1
elif [ ! -e gen/bin/example-crc32 ]; then
echo "Run \"./build-example.sh example/crc32\" first."
exit 1
elif [ -z $(which $DJPEG_BINARY) ]; then
echo "Could not find DJPEG_BINARY \"$DJPEG_BINARY\"."
exit 1
elif [[ ! $($DJPEG_BINARY -version 2>&1 >/dev/null) =~ ^libjpeg ]]; then
echo "Could not get libjpeg version from DJPEG_BINARY \"$DJPEG_BINARY\"."
exit 1
fi
djpeg_version=$($DJPEG_BINARY -version 2>&1 >/dev/null)
if [[ $djpeg_version =~ ^libjpeg.*version.2\.0 ||
$djpeg_version =~ ^libjpeg.*version.2\.1 ||
$djpeg_version =~ ^libjpeg.*version.3\.0\.0 ]]; then
# "Wuffs's std/jpeg matches djpeg" needs these libjpeg-turbo commits:
# - 6d91e950 Use 5x5 win & 9 AC coeffs when smoothing DC scans (in 2.1.0)
# - dbae5928 Fix interblock smoothing with narrow prog. JPEGs (in 3.0.1)
# - 9b704f96 Fix block smoothing w/vert.-subsampled prog. JPEGs (in 3.0.1)
# https://github.com/libjpeg-turbo/libjpeg-turbo/commit/6d91e950c871103a11bac2f10c63bf998796c719
# https://github.com/libjpeg-turbo/libjpeg-turbo/commit/dbae59281fdc6b3a6304a40134e8576d50d662c0
# https://github.com/libjpeg-turbo/libjpeg-turbo/commit/9b704f96b2dccc54363ad7a2fe8e378fc1a2893b
echo "\"$djpeg_version\" too old from DJPEG_BINARY \"$DJPEG_BINARY\"."
exit 1
fi
sources=$@
if [ $# -eq 0 ]; then
sources=test/data/*.jpeg
fi
# ----
result=0
handle() {
local want=$($DJPEG_BINARY $1 2>/dev/null | gen/bin/example-crc32)
if [ "$want" == "00000000" ]; then
return
fi
local have=$(gen/bin/example-convert-to-nia -output-netpbm <$1 2>/dev/null | gen/bin/example-crc32)
if [ "$want" == "$have" ]; then
echo "Match $1"
return
fi
# Image file format specifications cover how to correctly decode complete
# input but usually do not mandate exactly how to decode truncated input.
# Print "trunc" vs "other" to distinguish these cases.
local error=$(gen/bin/example-convert-to-nia -output-netpbm <$1 2>&1 >/dev/null)
if [[ $error =~ :\ truncated.input$ ]]; then
echo "Differ (trunc) $1"
else
echo "Differ (other) $1"
result=1
fi
}
# ----
for f in $sources; do
if [ -f $f ]; then
handle $f
elif [ -d $f ]; then
for g in `find $f -type f | LANG=C sort`; do
handle $g
done
else
echo "Could not open $f"
exit 1
fi
done
exit $result