| #!/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 |