qzxing/source/CameraImageWrapper.cpp

#include "CameraImageWrapper.h"
#include <QColor>
#include <QApplication>
#include <QDesktopWidget>

CameraImageWrapper::CameraImageWrapper() : LuminanceSource(0,0), isSmoothTransformationEnabled(false)
{
}

CameraImageWrapper::CameraImageWrapper(QImage& image) : LuminanceSource(image.width(), image.height()) , isSmoothTransformationEnabled(false)
{
    setImage(image);
}

CameraImageWrapper::CameraImageWrapper(CameraImageWrapper& otherInstance) : LuminanceSource(otherInstance.getWidth(), otherInstance.getHeight()) , isSmoothTransformationEnabled(false)
{
    image = otherInstance.getOriginalImage().copy();
}

CameraImageWrapper::~CameraImageWrapper()
{
}

int CameraImageWrapper::getWidth() const
{
    return image.width();
}

int CameraImageWrapper::getHeight() const
{
    return image.height();
}

unsigned char CameraImageWrapper::getPixel(int x, int y) const
{
    QRgb pixel = image.pixel(x,y);

    return qGray(pixel);//((qRed(pixel) + qGreen(pixel) + qBlue(pixel)) / 3);
}

unsigned char* CameraImageWrapper::copyMatrix() const
{
    unsigned char* newMatrix = (unsigned char*)malloc(image.width()*image.height()*sizeof(unsigned char));

    int cnt = 0;
    for(int i=0; i<image.width(); i++)
    {
        for(int j=0; j<image.height(); j++)
        {
            newMatrix[cnt++] = getPixel(i,j);
        }
    }

    return newMatrix;
}

bool CameraImageWrapper::setImage(QString fileName, int maxWidth, int maxHeight)
{
    bool isLoaded = image.load(fileName);

    if(!isLoaded)
        return false;

    scale(maxWidth, maxHeight);

    return true;
}

bool CameraImageWrapper::setImage(QImage newImage, int maxWidth, int maxHeight)
{
    if(newImage.isNull())
        return false;

    image = newImage.copy();

    scale(maxWidth, maxHeight);

    return true;
}

QImage CameraImageWrapper::grayScaleImage(QImage::Format f)
{
    QImage tmp(image.width(), image.height(), f);
    for(int i=0; i<image.width(); i++)
    {
        for(int j=0; j<image.height(); j++)
        {
            int pix = (int)getPixel(i,j);
            tmp.setPixel(i,j, qRgb(pix ,pix,pix));
        }
    }

    return tmp;
}

QImage CameraImageWrapper::getOriginalImage()
{
    return image;
}

ArrayRef<char> CameraImageWrapper::getRow(int y, ArrayRef<char> row) const
{
    int width = getWidth();

    if (row->size() != width)
        row.reset(ArrayRef<char>(width));

    for (int x = 0; x < width; x++)
        row[x] = getPixel(x,y);

    return row;
}

ArrayRef<char> CameraImageWrapper::getMatrix() const
{
    int width = getWidth();
    int height =  getHeight();
    char* matrix = new char[width*height];
    char* m = matrix;

    for(int y=0; y<height; y++)
    {
        ArrayRef<char> tmpRow;
        tmpRow = getRow(y, ArrayRef<char>(width));
#if __cplusplus > 199711L
        memcpy(m, tmpRow->values()..data(), width);
#else
		memcpy(m, &tmpRow->values()[0], width);
#endif
        m += width * sizeof(unsigned char);

        //delete tmpRow;
    }

    //pMatrix = matrix;
    return ArrayRef<char>(matrix, width*height);
}

void CameraImageWrapper::setSmoothTransformation(bool enable)
{
    isSmoothTransformationEnabled = enable;
}

void CameraImageWrapper::scale(int maxWidth, int maxHeight)
{
    if((maxWidth != 1 || maxHeight != 1) && (image.width() > maxWidth || image.height() > maxHeight))
        image = image.scaled(
                    maxWidth != -1 ? maxWidth : image.width(),
                    maxHeight != -1 ? maxHeight : image.height(),
                    Qt::KeepAspectRatio,
                    isSmoothTransformationEnabled ? Qt::SmoothTransformation : Qt::FastTransformation);
}