添加项目文件。

zxing.core/xx/pdf417/decoder/DetectionResultColumn.cs

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+/*
+ * 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.
+ */
+
+using System.Globalization;
+using System.Text;
+
+namespace ZXing.PDF417.Internal
+{
+   /// <summary>
+   /// Represents a Column in the Detection Result
+   /// </summary>
+   /// <author>Guenther Grau</author>
+   public class DetectionResultColumn
+   {
+      /// <summary>
+      /// The maximum distance to search in the codeword array in both the positive and negative directions
+      /// </summary>
+      private const int MAX_NEARBY_DISTANCE = 5;
+
+      /// <summary>
+      /// The Bounding Box around the column (in the BitMatrix)
+      /// </summary>
+      /// <value>The box.</value>
+      public BoundingBox Box { get; private set; }
+
+      /// <summary>
+      /// The Codewords the Box encodes for, offset by the Box minY.
+      /// Remember to Access this ONLY through GetCodeword(imageRow) if you're accessing it in that manner.
+      /// </summary>
+      /// <value>The codewords.</value>
+      public Codeword[] Codewords { get; set; }
+
+      // TODO convert this to a dictionary? Dictionary<imageRow, Codeword> ??
+
+      /// <summary>
+      /// Initializes a new instance of the <see cref="ZXing.PDF417.Internal.DetectionResultColumn"/> class.
+      /// </summary>
+      /// <param name="box">The Bounding Box around the column (in the BitMatrix)</param>
+      public DetectionResultColumn(BoundingBox box)
+      {
+         this.Box = BoundingBox.Create(box);
+         this.Codewords = new Codeword[Box.MaxY - Box.MinY + 1];
+      }
+
+      /// <summary>
+      /// Converts the Image's Row to the index in the Codewords array
+      /// </summary>
+      /// <returns>The Codeword Index.</returns>
+      /// <param name="imageRow">Image row.</param>
+      public int IndexForRow(int imageRow)
+      {
+         return imageRow - Box.MinY;
+      }
+
+      /// <summary>
+      /// Converts the Codeword array index into a Row in the Image (BitMatrix)
+      /// </summary>
+      /// <returns>The Image Row.</returns>
+      /// <param name="codewordIndex">Codeword index.</param>
+      public int RowForIndex(int codewordIndex)
+      {
+         return Box.MinY + codewordIndex;
+      }
+
+      /// <summary>
+      /// Gets the codeword for a given row
+      /// </summary>
+      /// <returns>The codeword.</returns>
+      /// <param name="imageRow">Image row.</param>
+      public Codeword getCodeword(int imageRow)
+      {
+         return Codewords[imageRowToCodewordIndex(imageRow)];
+      }
+
+      /// <summary>
+      /// Gets the codeword closest to the specified row in the image
+      /// </summary>
+      /// <param name="imageRow">Image row.</param>
+      public Codeword getCodewordNearby(int imageRow)
+      {
+         Codeword codeword = getCodeword(imageRow);
+         if (codeword != null)
+         {
+            return codeword;
+         }
+         for (int i = 1; i < MAX_NEARBY_DISTANCE; i++)
+         {
+            int nearImageRow = imageRowToCodewordIndex(imageRow) - i;
+            if (nearImageRow >= 0)
+            {
+               codeword = Codewords[nearImageRow];
+               if (codeword != null)
+               {
+                  return codeword;
+               }
+            }
+            nearImageRow = imageRowToCodewordIndex(imageRow) + i;
+            if (nearImageRow < Codewords.Length)
+            {
+               codeword = Codewords[nearImageRow];
+               if (codeword != null)
+               {
+                  return codeword;
+               }
+            }
+         }
+         return null;
+      }
+
+      internal int imageRowToCodewordIndex(int imageRow)
+      {
+         return imageRow - Box.MinY;
+      }
+
+      /// <summary>
+      /// Sets the codeword for an image row
+      /// </summary>
+      /// <param name="imageRow">Image row.</param>
+      /// <param name="codeword">Codeword.</param>
+      public void setCodeword(int imageRow, Codeword codeword)
+      {
+         Codewords[IndexForRow(imageRow)] = codeword;
+      }
+
+      /// <summary>
+      /// Returns a <see cref="System.String"/> that represents the current <see cref="ZXing.PDF417.Internal.DetectionResultColumn"/>.
+      /// </summary>
+      /// <returns>A <see cref="System.String"/> that represents the current <see cref="ZXing.PDF417.Internal.DetectionResultColumn"/>.</returns>
+      public override string ToString()
+      {
+         StringBuilder builder = new StringBuilder();
+         int row = 0;
+         foreach (var cw in Codewords)
+         {
+            if (cw == null)
+            {
+               builder.AppendFormat(CultureInfo.InvariantCulture, "{0,3}:    |   \n", row++);
+            }
+            else
+            {
+               builder.AppendFormat(CultureInfo.InvariantCulture, "{0,3}: {1,3}|{2,3}\n", row++, cw.RowNumber, cw.Value);
+            }
+         }
+         return builder.ToString();
+         // return "Valid Codewords: " + (from cw in Codewords where cw != null select cw).Count().ToString();
+      }
+   }
+}