shadowsocks-windows/shadowsocks-csharp/3rd/zxing/qrcode/decoder/QRCodeDecoderMetaData.cs

/*
 * 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.
      }
   }
}