using System.Collections;

/*
 * Copyright 2009 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 com.google.zxing
{

	using BitArray = com.google.zxing.common.BitArray;
	using BitMatrix = com.google.zxing.common.BitMatrix;

	/// <summary>
	/// This class hierarchy provides a set of methods to convert luminance data to 1 bit data.
	/// It allows the algorithm to vary polymorphically, for example allowing a very expensive
	/// thresholding technique for servers and a fast one for mobile. It also permits the implementation
	/// to vary, e.g. a JNI version for Android and a Java fallback version for other platforms.
	/// 
	/// @author dswitkin@google.com (Daniel Switkin)
	/// </summary>
	public abstract class Binarizer
	{

	  private readonly LuminanceSource source;

	  protected internal Binarizer(LuminanceSource source)
	  {
		this.source = source;
	  }

	  public LuminanceSource LuminanceSource
	  {
		  get
		  {
			return source;
		  }
	  }

	  /// <summary>
	  /// Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
	  /// cached data. Callers should assume this method is expensive and call it as seldom as possible.
	  /// This method is intended for decoding 1D barcodes and may choose to apply sharpening.
	  /// For callers which only examine one row of pixels at a time, the same BitArray should be reused
	  /// and passed in with each call for performance. However it is legal to keep more than one row
	  /// at a time if needed.
	  /// </summary>
	  /// <param name="y"> The row to fetch, 0 <= y < bitmap height. </param>
	  /// <param name="row"> An optional preallocated array. If null or too small, it will be ignored.
	  ///            If used, the Binarizer will call BitArray.clear(). Always use the returned object. </param>
	  /// <returns> The array of bits for this row (true means black). </returns>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public abstract com.google.zxing.common.BitArray getBlackRow(int y, com.google.zxing.common.BitArray row) throws NotFoundException;
	  public abstract BitArray getBlackRow(int y, BitArray row);

	  /// <summary>
	  /// Converts a 2D array of luminance data to 1 bit data. As above, assume this method is expensive
	  /// and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
	  /// may not apply sharpening. Therefore, a row from this matrix may not be identical to one
	  /// fetched using getBlackRow(), so don't mix and match between them.
	  /// </summary>
	  /// <returns> The 2D array of bits for the image (true means black). </returns>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public abstract com.google.zxing.common.BitMatrix getBlackMatrix() throws NotFoundException;
	  public abstract BitMatrix BlackMatrix {get;}

	  /// <summary>
	  /// Creates a new object with the same type as this Binarizer implementation, but with pristine
	  /// state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache
	  /// of 1 bit data. See Effective Java for why we can't use Java's clone() method.
	  /// </summary>
	  /// <param name="source"> The LuminanceSource this Binarizer will operate on. </param>
	  /// <returns> A new concrete Binarizer implementation object. </returns>
	  public abstract Binarizer createBinarizer(LuminanceSource source);

	  public int Width
	  {
		  get
		  {
			return source.Width;
		  }
	  }

	  public int Height
	  {
		  get
		  {
			return source.Height;
		  }
	  }

	}

}