KisFeatherSelectionFilter Class Reference

#include <kis_selection_filters.h>

Inheritance diagram for KisFeatherSelectionFilter:

Public Member Functions
QRect	changeRect (const QRect &rect, KisDefaultBoundsBaseSP defaultBounds) override
	KisFeatherSelectionFilter (qint32 radius)
KUndo2MagicString	name () override
void	process (KisPixelSelectionSP pixelSelection, const QRect &rect) override
Public Member Functions inherited from KisSelectionFilter
virtual	~KisSelectionFilter ()

Private Attributes
qint32	m_radius

Additional Inherited Members
Protected Member Functions inherited from KisSelectionFilter
void	computeBorder (qint32 *circ, qint32 xradius, qint32 yradius)
void	computeTransition (quint8 *transition, quint8 **buf, qint32 width)
void	rotatePointers (quint8 **p, quint32 n)

Detailed Description

Definition at line 77 of file kis_selection_filters.h.

Constructor & Destructor Documentation

KisFeatherSelectionFilter()

KisFeatherSelectionFilter::KisFeatherSelectionFilter

(

qint32

radius

)

Definition at line 492 of file kis_selection_filters.cpp.

    : m_radius(radius)
{
}

Member Function Documentation

changeRect()

QRect KisFeatherSelectionFilter::changeRect ( const QRect & rect, KisDefaultBoundsBaseSP defaultBounds )

overridevirtual

Reimplemented from KisSelectionFilter.

Definition at line 502 of file kis_selection_filters.cpp.

{
    Q_UNUSED(defaultBounds);
 
    return rect.adjusted(-m_radius, -m_radius,
                         m_radius, m_radius);
}

References m_radius.

name()

KUndo2MagicString KisFeatherSelectionFilter::name ( )

overridevirtual

Reimplemented from KisSelectionFilter.

Definition at line 497 of file kis_selection_filters.cpp.

{
    return kundo2_i18n("Feather Selection");
}

References kundo2_i18n().

process()

void KisFeatherSelectionFilter::process ( KisPixelSelectionSP pixelSelection, const QRect & rect )

overridevirtual

Implements KisSelectionFilter.

Definition at line 510 of file kis_selection_filters.cpp.

{
    // compute horizontal kernel
    const uint kernelSize = m_radius * 2 + 1;
    Eigen::Matrix<qreal, Eigen::Dynamic, Eigen::Dynamic> gaussianMatrix(1, kernelSize);
 
    const qreal multiplicand = 1.0 / (2.0 * M_PI * m_radius * m_radius);
    const qreal exponentMultiplicand = 1.0 / (2.0 * m_radius * m_radius);
 
    for (uint x = 0; x < kernelSize; x++) {
        uint xDistance = qAbs((int)m_radius - (int)x);
        gaussianMatrix(0, x) = multiplicand * exp( -(qreal)((xDistance * xDistance) + (m_radius * m_radius)) * exponentMultiplicand );
    }
 
    KisConvolutionKernelSP kernelHoriz = KisConvolutionKernel::fromMatrix(gaussianMatrix, 0, gaussianMatrix.sum());
    KisConvolutionKernelSP kernelVertical = KisConvolutionKernel::fromMatrix(gaussianMatrix.transpose(), 0, gaussianMatrix.sum());
 
    KisPaintDeviceSP interm = new KisPaintDevice(pixelSelection->colorSpace());
    interm->prepareClone(pixelSelection);
 
    KisConvolutionPainter horizPainter(interm);
    horizPainter.setChannelFlags(interm->colorSpace()->channelFlags(false, true));
    horizPainter.applyMatrix(kernelHoriz, pixelSelection, rect.topLeft(), rect.topLeft(), rect.size(), BORDER_REPEAT);
    horizPainter.end();
 
    KisConvolutionPainter verticalPainter(pixelSelection);
    verticalPainter.setChannelFlags(pixelSelection->colorSpace()->channelFlags(false, true));
    verticalPainter.applyMatrix(kernelVertical, interm, rect.topLeft(), rect.topLeft(), rect.size(), BORDER_REPEAT);
    verticalPainter.end();
}

References KisConvolutionPainter::applyMatrix(), BORDER_REPEAT, KoColorSpace::channelFlags(), KisPaintDevice::colorSpace(), KisPainter::end(), KisConvolutionKernel::fromMatrix(), M_PI, m_radius, KisPaintDevice::prepareClone(), and KisPainter::setChannelFlags().

Member Data Documentation

m_radius

qint32 KisFeatherSelectionFilter::m_radius

private

Definition at line 88 of file kis_selection_filters.h.

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The documentation for this class was generated from the following files:

• libs/image/kis_selection_filters.h
• libs/image/kis_selection_filters.cpp