添加项目文件。

zxing.core/xx/qrcode/detector/FinderPattern.cs

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+/*
+* Copyright 2007 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.
+*/
+
+using System;
+
+namespace ZXing.QrCode.Internal
+{
+   /// <summary>
+   /// <p>Encapsulates a finder pattern, which are the three square patterns found in
+   /// the corners of QR Codes. It also encapsulates a count of similar finder patterns,
+   /// as a convenience to the finder's bookkeeping.</p>
+   /// </summary>
+   /// <author>Sean Owen</author>
+   public sealed class FinderPattern : ResultPoint
+   {
+      private readonly float estimatedModuleSize;
+      private int count;
+
+      internal FinderPattern(float posX, float posY, float estimatedModuleSize)
+         : this(posX, posY, estimatedModuleSize, 1)
+      {
+         this.estimatedModuleSize = estimatedModuleSize;
+         this.count = 1;
+      }
+
+      internal FinderPattern(float posX, float posY, float estimatedModuleSize, int count)
+         : base(posX, posY)
+      {
+         this.estimatedModuleSize = estimatedModuleSize;
+         this.count = count;
+      }
+
+      /// <summary>
+      /// Gets the size of the estimated module.
+      /// </summary>
+      /// <value>
+      /// The size of the estimated module.
+      /// </value>
+      public float EstimatedModuleSize
+      {
+         get
+         {
+            return estimatedModuleSize;
+         }
+      }
+
+      internal int Count
+      {
+         get
+         {
+            return count;
+         }
+      }
+
+      /*
+      internal void incrementCount()
+      {
+         this.count++;
+      }
+      */
+
+      /// <summary> <p>Determines if this finder pattern "about equals" a finder pattern at the stated
+      /// position and size -- meaning, it is at nearly the same center with nearly the same size.</p>
+      /// </summary>
+      internal bool aboutEquals(float moduleSize, float i, float j)
+      {
+         if (Math.Abs(i - Y) <= moduleSize && Math.Abs(j - X) <= moduleSize)
+         {
+            float moduleSizeDiff = Math.Abs(moduleSize - estimatedModuleSize);
+            return moduleSizeDiff <= 1.0f || moduleSizeDiff <= estimatedModuleSize;
+
+         }
+         return false;
+      }
+
+      /// <summary>
+      /// Combines this object's current estimate of a finder pattern position and module size
+      /// with a new estimate. It returns a new {@code FinderPattern} containing a weighted average
+      /// based on count.
+      /// </summary>
+      /// <param name="i">The i.</param>
+      /// <param name="j">The j.</param>
+      /// <param name="newModuleSize">New size of the module.</param>
+      /// <returns></returns>
+      internal FinderPattern combineEstimate(float i, float j, float newModuleSize)
+      {
+         int combinedCount = count + 1;
+         float combinedX = (count * X + j) / combinedCount;
+         float combinedY = (count * Y + i) / combinedCount;
+         float combinedModuleSize = (count * estimatedModuleSize + newModuleSize) / combinedCount;
+         return new FinderPattern(combinedX, combinedY, combinedModuleSize, combinedCount);
+      }
+   }
+}