添加项目文件。

zxing.core/xx/maxicode/MaxiCodeReader.cs

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+/*
+ * Copyright 2011 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.Collections.Generic;
+
+using ZXing.Common;
+using ZXing.Maxicode.Internal;
+
+namespace ZXing.Maxicode
+{
+   /// <summary>
+   /// This implementation can detect and decode a MaxiCode in an image.
+   /// </summary>
+   public sealed class MaxiCodeReader : Reader
+   {
+      private static readonly ResultPoint[] NO_POINTS = new ResultPoint[0];
+      private const int MATRIX_WIDTH = 30;
+      private const int MATRIX_HEIGHT = 33;
+
+      private readonly Decoder decoder = new Decoder();
+
+      /// <summary>
+      /// Locates and decodes a MaxiCode in an image.
+      ///
+      /// <returns>a String representing the content encoded by the MaxiCode</returns>
+      /// <exception cref="FormatException">if a MaxiCode cannot be decoded</exception>
+      /// </summary>
+      public Result decode(BinaryBitmap image)
+      {
+         return decode(image, null);
+      }
+
+      /// <summary>
+      /// Locates and decodes a MaxiCode within an image. This method also accepts
+      /// hints, each possibly associated to some data, which may help the implementation decode.
+      /// </summary>
+      /// <param name="image">image of barcode to decode</param>
+      /// <param name="hints">passed as a <see cref="IDictionary{TKey, TValue}"/> from <see cref="DecodeHintType"/>
+      /// to arbitrary data. The
+      /// meaning of the data depends upon the hint type. The implementation may or may not do
+      /// anything with these hints.</param>
+      /// <returns>
+      /// String which the barcode encodes
+      /// </returns>
+      public Result decode(BinaryBitmap image, IDictionary<DecodeHintType, object> hints)
+      {
+         DecoderResult decoderResult;
+         if (hints != null && hints.ContainsKey(DecodeHintType.PURE_BARCODE))
+         {
+            BitMatrix bits = extractPureBits(image.BlackMatrix);
+            if (bits == null)
+               return null;
+            decoderResult = decoder.decode(bits, hints);
+            if (decoderResult == null)
+               return null;
+         }
+         else
+         {
+            return null;
+         }
+
+         ResultPoint[] points = NO_POINTS;
+         Result result = new Result(decoderResult.Text, decoderResult.RawBytes, points, BarcodeFormat.MAXICODE);
+
+         var ecLevel = decoderResult.ECLevel;
+         if (ecLevel != null)
+         {
+            result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);
+         }
+         return result;
+      }
+
+      public void reset()
+      {
+         // do nothing
+      }
+
+      /// <summary>
+      /// This method detects a code in a "pure" image -- that is, pure monochrome image
+      /// which contains only an unrotated, unskewed, image of a code, with some white border
+      /// around it. This is a specialized method that works exceptionally fast in this special
+      /// case.
+      ///
+      /// <seealso cref="ZXing.Datamatrix.DataMatrixReader.extractPureBits(BitMatrix)" />
+      /// <seealso cref="ZXing.QrCode.QRCodeReader.extractPureBits(BitMatrix)" />
+      /// </summary>
+      private static BitMatrix extractPureBits(BitMatrix image)
+      {
+
+         int[] enclosingRectangle = image.getEnclosingRectangle();
+         if (enclosingRectangle == null)
+         {
+            return null;
+         }
+
+         int left = enclosingRectangle[0];
+         int top = enclosingRectangle[1];
+         int width = enclosingRectangle[2];
+         int height = enclosingRectangle[3];
+
+         // Now just read off the bits
+         BitMatrix bits = new BitMatrix(MATRIX_WIDTH, MATRIX_HEIGHT);
+         for (int y = 0; y < MATRIX_HEIGHT; y++)
+         {
+            int iy = top + (y * height + height / 2) / MATRIX_HEIGHT;
+            for (int x = 0; x < MATRIX_WIDTH; x++)
+            {
+               int ix = left + (x * width + width / 2 + (y & 0x01) * width / 2) / MATRIX_WIDTH;
+               if (image[ix, iy])
+               {
+                  bits[x, y] = true;
+               }
+            }
+         }
+         return bits;
+      }
+   }
+}