/*
 * 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.
 */

namespace ZXing.PDF417.Internal
{
   /// <summary>
   /// Holds all of the information for a barcode in a format where it can be easily accessible
   ///
   /// <author>Jacob Haynes</author>
   /// </summary>
   internal sealed class BarcodeMatrix
   {
      private readonly BarcodeRow[] matrix;
      private int currentRow;
      private readonly int height;
      private readonly int width;

      /// <summary>
      /// <param name="height">the height of the matrix (Rows)</param>
      /// <param name="width">the width of the matrix (Cols)</param>
      /// </summary>
      internal BarcodeMatrix(int height, int width)
      {
         matrix = new BarcodeRow[height];
         //Initializes the array to the correct width
         for (int i = 0, matrixLength = matrix.Length; i < matrixLength; i++)
         {
            matrix[i] = new BarcodeRow((width + 4)*17 + 1);
         }
         this.width = width*17;
         this.height = height;
         this.currentRow = -1;
      }

      internal void set(int x, int y, sbyte value)
      {
         matrix[y][x] = value;
      }

      /*
      internal void setMatrix(int x, int y, bool black)
      {
         set(x, y, (sbyte) (black ? 1 : 0));
      }
      */

      internal void startRow()
      {
         ++currentRow;
      }

      internal BarcodeRow getCurrentRow()
      {
         return matrix[currentRow];
      }

      internal sbyte[][] getMatrix()
      {
         return getScaledMatrix(1, 1);
      }

      /*
      internal sbyte[][] getScaledMatrix(int Scale)
      {
         return getScaledMatrix(Scale, Scale);
      }
      */

      internal sbyte[][] getScaledMatrix(int xScale, int yScale)
      {
         sbyte[][] matrixOut = new sbyte[height*yScale][];
         for (int idx = 0; idx < height*yScale; idx++)
            matrixOut[idx] = new sbyte[width*xScale];
         int yMax = height*yScale;
         for (int ii = 0; ii < yMax; ii++)
         {
            matrixOut[yMax - ii - 1] = matrix[ii/yScale].getScaledRow(xScale);
         }
         return matrixOut;
      }
   }
}