aistudio-wpf-diagram/zxing.core/xx/datamatrix/decoder/Version.cs

/*
 * 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.Datamatrix.Internal
{
   /// <summary>
   /// The Version object encapsulates attributes about a particular
   /// size Data Matrix Code.
   ///
   /// <author>bbrown@google.com (Brian Brown)</author>
   /// </summary>
   public sealed class Version
   {
      private static readonly Version[] VERSIONS = buildVersions();

      private readonly int versionNumber;
      private readonly int symbolSizeRows;
      private readonly int symbolSizeColumns;
      private readonly int dataRegionSizeRows;
      private readonly int dataRegionSizeColumns;
      private readonly ECBlocks ecBlocks;
      private readonly int totalCodewords;

      internal Version(int versionNumber,
                      int symbolSizeRows,
                      int symbolSizeColumns,
                      int dataRegionSizeRows,
                      int dataRegionSizeColumns,
                      ECBlocks ecBlocks)
      {
         this.versionNumber = versionNumber;
         this.symbolSizeRows = symbolSizeRows;
         this.symbolSizeColumns = symbolSizeColumns;
         this.dataRegionSizeRows = dataRegionSizeRows;
         this.dataRegionSizeColumns = dataRegionSizeColumns;
         this.ecBlocks = ecBlocks;

         // Calculate the total number of codewords
         int total = 0;
         int ecCodewords = ecBlocks.ECCodewords;
         ECB[] ecbArray = ecBlocks.ECBlocksValue;
         foreach (ECB ecBlock in ecbArray)
         {
            total += ecBlock.Count * (ecBlock.DataCodewords + ecCodewords);
         }
         this.totalCodewords = total;
      }

      public int getVersionNumber()
      {
         return versionNumber;
      }

      public int getSymbolSizeRows()
      {
         return symbolSizeRows;
      }

      public int getSymbolSizeColumns()
      {
         return symbolSizeColumns;
      }

      public int getDataRegionSizeRows()
      {
         return dataRegionSizeRows;
      }

      public int getDataRegionSizeColumns()
      {
         return dataRegionSizeColumns;
      }

      public int getTotalCodewords()
      {
         return totalCodewords;
      }

      internal ECBlocks getECBlocks()
      {
         return ecBlocks;
      }

      /// <summary>
      /// <p>Deduces version information from Data Matrix dimensions.</p>
      ///
      /// <param name="numRows">Number of rows in modules</param>
      /// <param name="numColumns">Number of columns in modules</param>
      /// <returns>Version for a Data Matrix Code of those dimensions</returns>
      /// <exception cref="FormatException">if dimensions do correspond to a valid Data Matrix size</exception>
      /// </summary>
      public static Version getVersionForDimensions(int numRows, int numColumns)
      {
         if ((numRows & 0x01) != 0 || (numColumns & 0x01) != 0)
         {
            return null;
         }

         foreach (var version in VERSIONS)
         {
            if (version.symbolSizeRows == numRows && version.symbolSizeColumns == numColumns)
            {
               return version;
            }
         }

         return null;
      }

      /// <summary>
      /// <p>Encapsulates a set of error-correction blocks in one symbol version. Most versions will
      /// use blocks of differing sizes within one version, so, this encapsulates the parameters for
      /// each set of blocks. It also holds the number of error-correction codewords per block since it
      /// will be the same across all blocks within one version.</p>
      /// </summary>
      internal sealed class ECBlocks
      {
         private readonly int ecCodewords;
         private readonly ECB[] _ecBlocksValue;

         internal ECBlocks(int ecCodewords, ECB ecBlocks)
         {
            this.ecCodewords = ecCodewords;
            this._ecBlocksValue = new ECB[] { ecBlocks };
         }

         internal ECBlocks(int ecCodewords, ECB ecBlocks1, ECB ecBlocks2)
         {
            this.ecCodewords = ecCodewords;
            this._ecBlocksValue = new ECB[] { ecBlocks1, ecBlocks2 };
         }

         internal int ECCodewords
         {
            get { return ecCodewords; }
         }

         internal ECB[] ECBlocksValue
         {
            get { return _ecBlocksValue; }
         }
      }

      /// <summary>
      /// <p>Encapsualtes the parameters for one error-correction block in one symbol version.
      /// This includes the number of data codewords, and the number of times a block with these
      /// parameters is used consecutively in the Data Matrix code version's format.</p>
      /// </summary>
      internal sealed class ECB
      {
         private readonly int count;
         private readonly int dataCodewords;

         internal ECB(int count, int dataCodewords)
         {
            this.count = count;
            this.dataCodewords = dataCodewords;
         }

         internal int Count
         {
            get { return count; }
         }

         internal int DataCodewords
         {
            get { return dataCodewords; }
         }
      }

      override public String ToString()
      {
         return versionNumber.ToString();
      }

      /// <summary>
      /// See ISO 16022:2006 5.5.1 Table 7
      /// </summary>
      private static Version[] buildVersions()
      {
         return new Version[]
                   {
                      new Version(1, 10, 10, 8, 8,
                                  new ECBlocks(5, new ECB(1, 3))),
                      new Version(2, 12, 12, 10, 10,
                                  new ECBlocks(7, new ECB(1, 5))),
                      new Version(3, 14, 14, 12, 12,
                                  new ECBlocks(10, new ECB(1, 8))),
                      new Version(4, 16, 16, 14, 14,
                                  new ECBlocks(12, new ECB(1, 12))),
                      new Version(5, 18, 18, 16, 16,
                                  new ECBlocks(14, new ECB(1, 18))),
                      new Version(6, 20, 20, 18, 18,
                                  new ECBlocks(18, new ECB(1, 22))),
                      new Version(7, 22, 22, 20, 20,
                                  new ECBlocks(20, new ECB(1, 30))),
                      new Version(8, 24, 24, 22, 22,
                                  new ECBlocks(24, new ECB(1, 36))),
                      new Version(9, 26, 26, 24, 24,
                                  new ECBlocks(28, new ECB(1, 44))),
                      new Version(10, 32, 32, 14, 14,
                                  new ECBlocks(36, new ECB(1, 62))),
                      new Version(11, 36, 36, 16, 16,
                                  new ECBlocks(42, new ECB(1, 86))),
                      new Version(12, 40, 40, 18, 18,
                                  new ECBlocks(48, new ECB(1, 114))),
                      new Version(13, 44, 44, 20, 20,
                                  new ECBlocks(56, new ECB(1, 144))),
                      new Version(14, 48, 48, 22, 22,
                                  new ECBlocks(68, new ECB(1, 174))),
                      new Version(15, 52, 52, 24, 24,
                                  new ECBlocks(42, new ECB(2, 102))),
                      new Version(16, 64, 64, 14, 14,
                                  new ECBlocks(56, new ECB(2, 140))),
                      new Version(17, 72, 72, 16, 16,
                                  new ECBlocks(36, new ECB(4, 92))),
                      new Version(18, 80, 80, 18, 18,
                                  new ECBlocks(48, new ECB(4, 114))),
                      new Version(19, 88, 88, 20, 20,
                                  new ECBlocks(56, new ECB(4, 144))),
                      new Version(20, 96, 96, 22, 22,
                                  new ECBlocks(68, new ECB(4, 174))),
                      new Version(21, 104, 104, 24, 24,
                                  new ECBlocks(56, new ECB(6, 136))),
                      new Version(22, 120, 120, 18, 18,
                                  new ECBlocks(68, new ECB(6, 175))),
                      new Version(23, 132, 132, 20, 20,
                                  new ECBlocks(62, new ECB(8, 163))),
                      new Version(24, 144, 144, 22, 22,
                                  new ECBlocks(62, new ECB(8, 156), new ECB(2, 155))),
                      new Version(25, 8, 18, 6, 16,
                                  new ECBlocks(7, new ECB(1, 5))),
                      new Version(26, 8, 32, 6, 14,
                                  new ECBlocks(11, new ECB(1, 10))),
                      new Version(27, 12, 26, 10, 24,
                                  new ECBlocks(14, new ECB(1, 16))),
                      new Version(28, 12, 36, 10, 16,
                                  new ECBlocks(18, new ECB(1, 22))),
                      new Version(29, 16, 36, 14, 16,
                                  new ECBlocks(24, new ECB(1, 32))),
                      new Version(30, 16, 48, 14, 22,
                                  new ECBlocks(28, new ECB(1, 49)))
                   };
      }
   }
}