/*
 * Copyright 2013 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace ZXing.QrCode.Internal
{
    /// <summary>
    /// Meta-data container for QR Code decoding. Instances of this class may be used to convey information back to the
    /// decoding caller. Callers are expected to process this.
    /// </summary>
    public sealed class QRCodeDecoderMetaData
    {
        private readonly bool mirrored;

        /// <summary>
        /// Initializes a new instance of the <see cref="QRCodeDecoderMetaData"/> class.
        /// </summary>
        /// <param name="mirrored">if set to <c>true</c> [mirrored].</param>
        public QRCodeDecoderMetaData(bool mirrored)
        {
            this.mirrored = mirrored;
        }

        /// <summary>
        /// true if the QR Code was mirrored. 
        /// </summary>
        public bool IsMirrored
        {
            get { return mirrored; }
        }

        /// <summary>
        /// Apply the result points' order correction due to mirroring.
        /// </summary>
        /// <param name="points">Array of points to apply mirror correction to.</param>
        public void applyMirroredCorrection(ResultPoint[] points)
        {
            if (!mirrored || points == null || points.Length < 3)
            {
                return;
            }
            ResultPoint bottomLeft = points[0];
            points[0] = points[2];
            points[2] = bottomLeft;
            // No need to 'fix' top-left and alignment pattern.
        }
    }
}