KisRandomSubAccessor Class Reference

#include <kis_random_sub_accessor.h>

Inheritance diagram for KisRandomSubAccessor:

Public Member Functions
	KisRandomSubAccessor (KisPaintDeviceSP device)
void	moveTo (const QPointF &p)
void	moveTo (qreal x, qreal y)
void	sampledOldRawData (quint8 *dst)
void	sampledRawData (quint8 *dst)
	~KisRandomSubAccessor ()
Public Member Functions inherited from KisShared
bool	deref ()
bool	ref ()
int	refCount ()
QAtomicInt *	sharedWeakReference ()

Private Attributes
QPointF	m_currentPoint
KisPaintDeviceSP	m_device
KisRandomConstAccessorSP	m_randomAccessor

Additional Inherited Members
Protected Member Functions inherited from KisShared
	KisShared ()
	~KisShared ()

Detailed Description

Gives a random access to the sampled subpixels of an image. Use the moveTo function to select the pixel. And then rawData to access the value of a pixel.

Definition at line 23 of file kis_random_sub_accessor.h.

Constructor & Destructor Documentation

KisRandomSubAccessor()

KisRandomSubAccessor::KisRandomSubAccessor

(

KisPaintDeviceSP

device

)

Definition at line 18 of file kis_random_sub_accessor.cpp.

        : m_device(device)
        , m_currentPoint(0, 0)
        , m_randomAccessor(device->createRandomConstAccessorNG())
{
}

~KisRandomSubAccessor()

KisRandomSubAccessor::~KisRandomSubAccessor

(

)

Definition at line 26 of file kis_random_sub_accessor.cpp.

{
}

Member Function Documentation

moveTo() [1/2]

void KisRandomSubAccessor::moveTo ( const QPointF & p )

inline

Definition at line 41 of file kis_random_sub_accessor.h.

                                         {
        m_currentPoint = p;
    }

References p.

moveTo() [2/2]

void KisRandomSubAccessor::moveTo ( qreal x, qreal y )

inline

Definition at line 38 of file kis_random_sub_accessor.h.

                                         {
        m_currentPoint.setX(x); m_currentPoint.setY(y);
    }

sampledOldRawData()

void KisRandomSubAccessor::sampledOldRawData

(

quint8 *

dst

)

Copy the sampled old value to destination

Definition at line 31 of file kis_random_sub_accessor.cpp.

{
    const quint8* pixels[4];
    qint16 weights[4];
    int x = qFloor(m_currentPoint.x());
    int y = qFloor(m_currentPoint.y());
 
    double hsub = m_currentPoint.x() - x;
    if (hsub < 0.0) {
        hsub = 1.0 + hsub;
    }
    double vsub = m_currentPoint.y() - y;
    if (vsub < 0.0) {
        vsub = 1.0 + vsub;
    }
    
    int sumOfWeights = 0;
 
    weights[0] = qRound((1.0 - hsub) * (1.0 - vsub) * 255);
    sumOfWeights += weights[0];
    m_randomAccessor->moveTo(x, y);
    pixels[0] = m_randomAccessor->oldRawData();
    weights[1] = qRound((1.0 - vsub) * hsub * 255);
    sumOfWeights += weights[1];
    m_randomAccessor->moveTo(x + 1, y);
    pixels[1] = m_randomAccessor->oldRawData();
    weights[2] = qRound(vsub * (1.0 - hsub) * 255);
    sumOfWeights += weights[2];
    m_randomAccessor->moveTo(x, y + 1);
    pixels[2] = m_randomAccessor->oldRawData();
    weights[3] = qRound(hsub * vsub * 255);
    sumOfWeights += weights[3];
    m_randomAccessor->moveTo(x + 1, y + 1);
    pixels[3] = m_randomAccessor->oldRawData();
 
    m_device->colorSpace()->mixColorsOp()->mixColors(pixels, weights, 4, dst, sumOfWeights);
}

References KisPaintDevice::colorSpace(), m_currentPoint, m_device, m_randomAccessor, KoMixColorsOp::mixColors(), KoColorSpace::mixColorsOp, KisRandomConstAccessorNG::moveTo(), and KisBaseConstAccessor::oldRawData().

sampledRawData()

void KisRandomSubAccessor::sampledRawData

(

quint8 *

dst

)

Copy the sampled value to destination

Definition at line 70 of file kis_random_sub_accessor.cpp.

{
    const quint8* pixels[4];
    qint16 weights[4];
    int x = qFloor(m_currentPoint.x());
    int y = qFloor(m_currentPoint.y());
 
    double hsub = m_currentPoint.x() - x;
    if (hsub < 0.0) {
        hsub = 1.0 + hsub;
    }
    double vsub = m_currentPoint.y() - y;
    if (vsub < 0.0) {
        vsub = 1.0 + vsub;
    }
    
    int sumOfWeights = 0;
 
    weights[0] = qRound((1.0 - hsub) * (1.0 - vsub) * 255);
    sumOfWeights += weights[0];
    m_randomAccessor->moveTo(x, y);
    pixels[0] = m_randomAccessor->rawDataConst();
    weights[1] = qRound((1.0 - vsub) * hsub * 255);
    sumOfWeights += weights[1];
    m_randomAccessor->moveTo(x + 1, y);
    pixels[1] = m_randomAccessor->rawDataConst();
    weights[2] = qRound(vsub * (1.0 - hsub) * 255);
    sumOfWeights += weights[2];
    m_randomAccessor->moveTo(x, y + 1);
    pixels[2] = m_randomAccessor->rawDataConst();
    weights[3] = qRound(hsub * vsub * 255);
    sumOfWeights += weights[3];
    m_randomAccessor->moveTo(x + 1, y + 1);
    pixels[3] = m_randomAccessor->rawDataConst();
    m_device->colorSpace()->mixColorsOp()->mixColors(pixels, weights, 4, dst, sumOfWeights);
}

References KisPaintDevice::colorSpace(), m_currentPoint, m_device, m_randomAccessor, KoMixColorsOp::mixColors(), KoColorSpace::mixColorsOp, KisRandomConstAccessorNG::moveTo(), and KisBaseConstAccessor::rawDataConst().

Member Data Documentation

m_currentPoint

QPointF KisRandomSubAccessor::m_currentPoint

private

Definition at line 47 of file kis_random_sub_accessor.h.

m_device

KisPaintDeviceSP KisRandomSubAccessor::m_device

private

Definition at line 46 of file kis_random_sub_accessor.h.

m_randomAccessor

KisRandomConstAccessorSP KisRandomSubAccessor::m_randomAccessor

private

Definition at line 48 of file kis_random_sub_accessor.h.

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

• libs/image/kis_random_sub_accessor.h
• libs/image/kis_random_sub_accessor.cpp