KoGradientSegment::CurvedInterpolationStrategy Class Reference

#include <KoSegmentGradient.h>

Inheritance diagram for KoGradientSegment::CurvedInterpolationStrategy:

Public Member Functions
int	type () const override
qreal	valueAt (qreal t, qreal middle) const override
Public Member Functions inherited from KoGradientSegment::InterpolationStrategy
	InterpolationStrategy ()
virtual	~InterpolationStrategy ()

Static Public Member Functions
static CurvedInterpolationStrategy *	instance ()

Private Member Functions
	CurvedInterpolationStrategy ()

Private Attributes
qreal	m_logHalf

Static Private Attributes
static CurvedInterpolationStrategy *	m_instance = 0

Detailed Description

Definition at line 212 of file KoSegmentGradient.h.

Constructor & Destructor Documentation

CurvedInterpolationStrategy()

KoGradientSegment::CurvedInterpolationStrategy::CurvedInterpolationStrategy ( )

private

Definition at line 777 of file KoSegmentGradient.cpp.

{
    m_logHalf = log(0.5);
}

Member Function Documentation

instance()

KoGradientSegment::CurvedInterpolationStrategy * KoGradientSegment::CurvedInterpolationStrategy::instance ( )

static

Definition at line 782 of file KoSegmentGradient.cpp.

{
    if (m_instance == 0) {
        m_instance = new CurvedInterpolationStrategy();
        Q_CHECK_PTR(m_instance);
    }
 
    return m_instance;
}

type()

int KoGradientSegment::CurvedInterpolationStrategy::type ( ) const

inlineoverridevirtual

Implements KoGradientSegment::InterpolationStrategy.

Definition at line 218 of file KoSegmentGradient.h.

                                  {
            return INTERP_CURVED;
        }

References INTERP_CURVED.

valueAt()

qreal KoGradientSegment::CurvedInterpolationStrategy::valueAt ( qreal t, qreal middle ) const

overridevirtual

Implements KoGradientSegment::InterpolationStrategy.

Definition at line 792 of file KoSegmentGradient.cpp.

{
    Q_ASSERT(t > -DBL_EPSILON && t < 1 + DBL_EPSILON);
    Q_ASSERT(middle > -DBL_EPSILON && middle < 1 + DBL_EPSILON);
 
    qreal value = 0;
 
    if (middle < DBL_EPSILON) {
        middle = DBL_EPSILON;
    }
 
    value = pow(t, m_logHalf / log(middle));
 
    return value;
}

References value().

Member Data Documentation

m_instance

KoGradientSegment::CurvedInterpolationStrategy * KoGradientSegment::CurvedInterpolationStrategy::m_instance = 0

staticprivate

Definition at line 224 of file KoSegmentGradient.h.

m_logHalf

qreal KoGradientSegment::CurvedInterpolationStrategy::m_logHalf

private

Definition at line 225 of file KoSegmentGradient.h.

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

• libs/pigment/resources/KoSegmentGradient.h
• libs/pigment/resources/KoSegmentGradient.cpp