KoGradientSegment::LinearInterpolationStrategy Class Reference

#include <KoSegmentGradient.h>

Inheritance diagram for KoGradientSegment::LinearInterpolationStrategy:

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 qreal	calcValueAt (qreal t, qreal middle)
static LinearInterpolationStrategy *	instance ()

Private Member Functions
	LinearInterpolationStrategy ()

Static Private Attributes
static LinearInterpolationStrategy *	m_instance = 0

Detailed Description

Definition at line 191 of file KoSegmentGradient.h.

Constructor & Destructor Documentation

LinearInterpolationStrategy()

KoGradientSegment::LinearInterpolationStrategy::LinearInterpolationStrategy ( )

inlineprivate

Definition at line 207 of file KoSegmentGradient.h.

{}

Member Function Documentation

calcValueAt()

qreal KoGradientSegment::LinearInterpolationStrategy::calcValueAt ( qreal t, qreal middle )

static

Definition at line 748 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 (t <= middle) {
        if (middle < DBL_EPSILON) {
            value = 0;
        } else {
            value = (t / middle) * 0.5;
        }
    } else {
        if (middle > 1 - DBL_EPSILON) {
            value = 1;
        } else {
            value = ((t - middle) / (1 - middle)) * 0.5 + 0.5;
        }
    }
 
    return value;
}

References value().

instance()

KoGradientSegment::LinearInterpolationStrategy * KoGradientSegment::LinearInterpolationStrategy::instance ( )

static

Definition at line 738 of file KoSegmentGradient.cpp.

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

type()

int KoGradientSegment::LinearInterpolationStrategy::type ( ) const

inlineoverridevirtual

Implements KoGradientSegment::InterpolationStrategy.

Definition at line 197 of file KoSegmentGradient.h.

                                  {
            return INTERP_LINEAR;
        }

References INTERP_LINEAR.

valueAt()

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

overridevirtual

Implements KoGradientSegment::InterpolationStrategy.

Definition at line 772 of file KoSegmentGradient.cpp.

{
    return calcValueAt(t, middle);
}

Member Data Documentation

m_instance

KoGradientSegment::LinearInterpolationStrategy * KoGradientSegment::LinearInterpolationStrategy::m_instance = 0

staticprivate

Definition at line 209 of file KoSegmentGradient.h.

---

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

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