#!/bin/bash

VERBOSE=${VERBOSE:-0}

IN=in.png
OUT=out.png
OUT_BMP=out.bmp

error() {
    echo "$*" >&2
    exit 1
}

verbose() {
    if [ $VERBOSE != 0 ]; then
        "$@"
    fi
}

compare_images() {
    DIFF=$(compare -metric AE $1 $2 - 2>&1 > /dev/null || true)
    if [ "$DIFF" != "0" ]; then
        error "Images $1 and $2 are too different, diff $DIFF"
    fi
}

do_test() {
    echo "Running image $IMAGE with '$*'..."
    convert $IMAGE "$@" $IN
    wine imagetest.exe $IN $OUT_BMP $OUT
    verbose ls -lh $IN
    verbose identify $IN
    verbose identify $OUT_BMP
    compare_images $IN $OUT
    compare_images $IN $OUT_BMP
    rm -f $IN $OUT $OUT_BMP
}

do_test_all() {
    IMAGE="$1"
    do_test
    do_test -type Palette
    do_test -type Palette -colors 14
    do_test -type Palette -colors 3
    do_test -type TrueColor
    do_test -type Grayscale -depth 8
    do_test -type Grayscale -depth 2
    do_test -type Grayscale -depth 4
}

set -e
# test with small image
do_test_all rose:
# test with larger image
do_test_all logo:
rm -f $IN $OUT $OUT_BMP

verbose echo Finish