FloatImage.cpp

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// ****************************************************************************
// This file is part of the Integrating Vision Toolkit (IVT).
//
// The IVT is maintained by the Karlsruhe Institute of Technology (KIT)
// (www.kit.edu) in cooperation with the company Keyetech (www.keyetech.de).
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// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
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// THIS SOFTWARE IS PROVIDED BY THE KIT AND CONTRIBUTORS “AS IS” AND ANY
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// ****************************************************************************
// ****************************************************************************
// Filename:  FloatImage.cpp
// Author:    Jan Issac
// Date:      2011
// ****************************************************************************


// ****************************************************************************
// Includes
// ****************************************************************************

#include <new> // for explicitly using correct new/delete operators on VC DSPs

#include "FloatImage.h"
#include "ByteImage.h"
#include "Image/ImageProcessor.h"

#include "Helpers/helpers.h"

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>




// ****************************************************************************
// Defines
// ****************************************************************************

// ****************************************************************************
// Constructors / Destructor
// ****************************************************************************

CFloatImage::CFloatImage()
{
        width = 0;
        height = 0;
        bytesPerPixel = 0;
        pixels = 0;
        numberOfChannels = 1;
        m_bOwnMemory = false;
}

CFloatImage::CFloatImage(int nImageWidth, int nImageHeight, int nNumberOfChannels, bool bHeaderOnly)
{
    bytesPerPixel = nNumberOfChannels * sizeof(float);

        width = nImageWidth;
        height = nImageHeight;
        numberOfChannels = nNumberOfChannels;

        if (bHeaderOnly)
        {
                pixels = 0;
                m_bOwnMemory = false;
        }
        else
        {
                pixels = new float[width * height * numberOfChannels];
                m_bOwnMemory = true;
        }
}

CFloatImage::CFloatImage(const CFloatImage &image, bool bHeaderOnly)
{
        width = image.width;
        height = image.height;
        bytesPerPixel = image.bytesPerPixel;
        numberOfChannels = image.numberOfChannels;
        
        if (bHeaderOnly)
        {
                pixels = 0;
                m_bOwnMemory = false;
        }
        else
        {
            pixels = new float[width * height * numberOfChannels];
                m_bOwnMemory = true;
        }
}

CFloatImage::CFloatImage(const CFloatImage *pImage, bool bHeaderOnly)
{
        width = pImage->width;
        height = pImage->height;
        bytesPerPixel = pImage->bytesPerPixel;
        numberOfChannels = pImage->numberOfChannels;
        
        if (bHeaderOnly)
        {
                pixels = 0;
                m_bOwnMemory = false;
        }
        else
        {
            pixels = new float[width * height * numberOfChannels];
                m_bOwnMemory = true;
        }
}

CFloatImage::~CFloatImage()
{
    FreeMemory();
}


// ****************************************************************************
// Methods
// ****************************************************************************

void CFloatImage::FreeMemory()
{
        if (pixels)
        {
                if (m_bOwnMemory)
                delete [] pixels;

                pixels = 0;
                m_bOwnMemory = false;
        }
}

bool CFloatImage::IsCompatible(const CFloatImage *pImage) const
{
        return width == pImage->width && height == pImage->height && numberOfChannels == pImage->numberOfChannels;
}


bool CFloatImage::LoadFromFile(const char *pFileName)
{
    // first free memory, in any case
    FreeMemory();

    CByteImage im;
    if (im.LoadFromFile(pFileName))
    {
        switch(im.type)
        {
        case CByteImage::eGrayScale:
            numberOfChannels = 1;
            break;
        case CByteImage::eRGB24:
            numberOfChannels = 3;
            break;
        case CByteImage::eRGB24Split:
            printf("error: CByteImage::eRGB24Split to 3-Channel CFloatImage not supported.");
            return false;
        }

        width = im.width;
        height = im.height;
        pixels = new float[width * height * numberOfChannels];
        m_bOwnMemory = true;

        ImageProcessor::ConvertImage(&im, this);
        return true;
    }

        return false;
}


bool CFloatImage::SaveToFile(const char *pFileName) const
{
    CByteImage::ImageType imType;

    switch(numberOfChannels)
    {
    case 1:
        imType = CByteImage::eGrayScale;
        break;
    case 3:
        imType = CByteImage::eRGB24;
        break;
    }

    CByteImage im(width, height, imType);

    ImageProcessor::ConvertImage(this, &im);

    return im.SaveToFile(pFileName);
}