LuminanceSource.h

00001 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
00002 #ifndef __LUMINANCESOURCE_H__
00003 #define __LUMINANCESOURCE_H__
00004 /*
00005  *  LuminanceSource.h
00006  *  zxing
00007  *
00008  *  Copyright 2010 ZXing authors All rights reserved.
00009  *
00010  * Licensed under the Apache License, Version 2.0 (the "License");
00011  * you may not use this file except in compliance with the License.
00012  * You may obtain a copy of the License at
00013  *
00014  *      http://www.apache.org/licenses/LICENSE-2.0
00015  *
00016  * Unless required by applicable law or agreed to in writing, software
00017  * distributed under the License is distributed on an "AS IS" BASIS,
00018  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00019  * See the License for the specific language governing permissions and
00020  * limitations under the License.
00021  */
00022 
00023 #include <zxing/common/Counted.h>
00024 #include <zxing/common/Array.h>
00025 #include <string.h>
00026 
00027 namespace zxing {
00028 
00029 class LuminanceSource : public Counted {
00030  private:
00031   const int width;
00032   const int height;
00033 
00034  public:
00035   LuminanceSource(int width, int height);
00036   virtual ~LuminanceSource();
00037 
00038   int getWidth() const { return width; }
00039   int getHeight() const { return height; }
00040 
00041   // Callers take ownership of the returned memory and must call delete [] on it themselves.
00042   virtual ArrayRef<char> getRow(int y, ArrayRef<char> row) const = 0;
00043   virtual ArrayRef<char> getMatrix() const = 0;
00044 
00045   virtual bool isCropSupported() const;
00046   virtual Ref<LuminanceSource> crop(int left, int top, int width, int height) const;
00047 
00048   virtual bool isRotateSupported() const;
00049 
00050   virtual Ref<LuminanceSource> invert() const;
00051   
00052   virtual Ref<LuminanceSource> rotateCounterClockwise() const;
00053 
00054   operator std::string () const;
00055 };
00056 
00057 }
00058 
00059 #endif /* LUMINANCESOURCE_H_ */