BitmapBasicMorphologyFilter.hxx

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#ifndef INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
#define INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
 
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/BitmapFilter.hxx>
 
enum class BasicMorphologyOp
{
    erode,
    dilate
};
 
/* Black is foreground, white is background */
class VCL_DLLPUBLIC BitmapBasicMorphologyFilter : public BitmapFilter
{
public:
    BitmapBasicMorphologyFilter(BasicMorphologyOp op, sal_Int32 nRadius);
    BitmapBasicMorphologyFilter(BasicMorphologyOp op, sal_Int32 nRadius, sal_uInt8 nValueOutside);
    virtual ~BitmapBasicMorphologyFilter();
 
    virtual BitmapEx execute(BitmapEx const& rBitmap) const override;
 
private:
    Bitmap filter(Bitmap const& rBitmap) const;
 
    BasicMorphologyOp m_eOp;
    sal_Int32 m_nRadius;
    sal_uInt8 m_nValueOutside = 0;
    bool m_bUseValueOutside = false;
};
 
class BitmapErodeFilter final : public BitmapBasicMorphologyFilter
{
public:
    BitmapErodeFilter(sal_Int32 nRadius)
        : BitmapBasicMorphologyFilter(BasicMorphologyOp::erode, nRadius)
    {
    }
    BitmapErodeFilter(sal_Int32 nRadius, sal_uInt8 nValueOutside)
        : BitmapBasicMorphologyFilter(BasicMorphologyOp::erode, nRadius, nValueOutside)
    {
    }
};
 
class BitmapDilateFilter final : public BitmapBasicMorphologyFilter
{
public:
    BitmapDilateFilter(sal_Int32 nRadius)
        : BitmapBasicMorphologyFilter(BasicMorphologyOp::dilate, nRadius)
    {
    }
    BitmapDilateFilter(sal_Int32 nRadius, sal_uInt8 nValueOutside)
        : BitmapBasicMorphologyFilter(BasicMorphologyOp::dilate, nRadius, nValueOutside)
    {
    }
};
 
#endif // INCLUDED_VCL_BITMAPBASICMORPHOLOGYFILTER_HXX
 
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