#include <KisGradientMapFilterNearestCachedGradient.h>

Public Member Functions
const quint8 *	cachedAt (qreal t) const
	gets the color data at position 0 <= t <= 1

	KisGradientMapFilterNearestCachedGradient (const KoAbstractGradientSP gradient, qint32 steps, const KoColorSpace *cs)

Private Attributes
const KoColor	m_black

QVector< KoColor >	m_colors

const qint32	m_max

Detailed Description

Definition at line 19 of file KisGradientMapFilterNearestCachedGradient.h.

Constructor & Destructor Documentation

◆ KisGradientMapFilterNearestCachedGradient()

KisGradientMapFilterNearestCachedGradient::KisGradientMapFilterNearestCachedGradient	(	const KoAbstractGradientSP	gradient,
		qint32	steps,
		const KoColorSpace *	cs )

Definition at line 17 of file KisGradientMapFilterNearestCachedGradient.cpp.

    : m_max(steps - 1)
    , m_black(KoColor(cs))
{
    if (dynamic_cast<KoStopGradient*>(gradient.data())) {
        KoStopGradient *stopGradient = static_cast<KoStopGradient*>(gradient.data());
        for (qint32 i = 0; i < steps; i++) {
            qreal t = static_cast<qreal>(i) / m_max;
            KoGradientStop leftStop, rightStop;
            if (!stopGradient->stopsAt(leftStop, rightStop, t)) {
                m_colors << m_black;
            } else {
                if (std::abs(t - leftStop.position) < std::abs(t - rightStop.position)) {
                    m_colors << leftStop.color.convertedTo(cs);
                } else {
                    m_colors << rightStop.color.convertedTo(cs);
                }
            }
        }
    } else if (dynamic_cast<KoSegmentGradient*>(gradient.data())) {
        KoSegmentGradient *segmentGradient = static_cast<KoSegmentGradient*>(gradient.data());
        for (qint32 i = 0; i < steps; i++) {
            qreal t = static_cast<qreal>(i) / m_max;
            KoGradientSegment *segment = segmentGradient->segmentAt(t);
            if (!segment) {
                m_colors << m_black;
            } else {
                if (std::abs(t - segment->startOffset()) < std::abs(t - segment->endOffset())) {
                    m_colors << segment->startColor().convertedTo(cs);
                } else {
                    m_colors << segment->endColor().convertedTo(cs);
                }
            }
        }
    }
 
}

References KoGradientStop::color, KoColor::convertedTo(), KoGradientSegment::endColor(), KoGradientSegment::endOffset(), m_black, m_colors, m_max, KoGradientStop::position, KoSegmentGradient::segmentAt(), KoGradientSegment::startColor(), KoGradientSegment::startOffset(), and KoStopGradient::stopsAt().

Member Function Documentation

◆ cachedAt()

const quint8 * KisGradientMapFilterNearestCachedGradient::cachedAt ( qreal t ) const

gets the color data at position 0 <= t <= 1

Definition at line 55 of file KisGradientMapFilterNearestCachedGradient.cpp.

{
    qint32 tInt = t * m_max + 0.5;
    if (m_colors.size() > tInt) {
        return m_colors[tInt].data();
    } else {
        return m_black.data();
    }
}