BitmapGaussianSeparableBlurFilter.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#ifndef INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
#define INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
 
#include <vcl/BitmapFilter.hxx>
#include <vector>
 
class BitmapEx;
 
class BitmapGaussianSeparableBlurFilter final : public BitmapFilter
{
public:
    BitmapGaussianSeparableBlurFilter(double fRadius)
        : mfRadius(fRadius)
    {
    }
 
    virtual BitmapEx execute(BitmapEx const& rBitmapEx) const override;
 
private:
    double mfRadius;
 
    static bool convolutionPass(const Bitmap& rBitmap, Bitmap& aNewBitmap,
                                BitmapReadAccess const* pReadAcc, int aNumberOfContributions,
                                const double* pWeights, int const* pPixels, const int* pCount);
 
    static std::vector<double> makeBlurKernel(const double radius, int& rows);
    static void blurContributions(const int aSize, const int aNumberOfContributions,
                                  const std::vector<double>& rBlurVector,
                                  std::vector<double>& rWeights, std::vector<int>& rPixels,
                                  std::vector<int>& rCounts);
};
 
#endif
 
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