CameraImageWrapper.h Example File

 /*
  * Copyright 2011 QZXing 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.
  */

 #ifndef CAMERAIMAGE_H
 #define CAMERAIMAGE_H

 #include <QImage>
 #include <QString>
 #include <zxing/zxing/common/GreyscaleLuminanceSource.h>

 using namespace zxing;

 class CameraImageWrapper : public LuminanceSource
 {
 public:
     CameraImageWrapper();
     CameraImageWrapper(const QImage& sourceImage);
     CameraImageWrapper(CameraImageWrapper& otherInstance);
     ~CameraImageWrapper();

     static CameraImageWrapper* Factory(const QImage& image, int maxWidth=-1, int maxHeight=-1, bool smoothTransformation=false);

     ArrayRef<ArrayRef<byte> > getOriginalImage();
     Ref<GreyscaleLuminanceSource> getDelegate() { return delegate; }

     ArrayRef<zxing::byte> getRow(int y, ArrayRef<zxing::byte> row) const;
     ArrayRef<zxing::byte> getMatrix() const;

     bool isCropSupported() const;
     Ref<LuminanceSource> crop(int left, int top, int width, int height) const;
     bool isRotateSupported() const;
     Ref<LuminanceSource> invert() const;
     Ref<LuminanceSource> rotateCounterClockwise() const;

     inline byte gray(unsigned int r, unsigned int g, unsigned int b);

 private:
     ArrayRef<zxing::byte> getRowP(int y, ArrayRef<zxing::byte> row) const;
     ArrayRef<zxing::byte> getMatrixP() const;
     void updateImageAsGrayscale(const QImage &origin);

     Ref<GreyscaleLuminanceSource> delegate;
     ArrayRef<ArrayRef<byte>> imageBytesPerRow;
     ArrayRef<byte> imageBytes;

     static const byte B_TO_GREYSCALE[256];
     static const byte G_TO_GREYSCALE[256];
     static const byte R_TO_GREYSCALE[256];
 };

 #endif //CAMERAIMAGE_H