qt-everywhere-src-5.14.1/qtlottie/src/bodymovin/bmrepeatertransform.cpp

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#include "bmrepeatertransform_p.h"

QT_BEGIN_NAMESPACE

BMRepeaterTransform::BMRepeaterTransform(const BMRepeaterTransform &other)
    : BMBasicTransform(other)
{
    m_startOpacity = other.m_startOpacity;
    m_endOpacity = other.m_endOpacity;
    m_opacities = other.m_opacities;
}

BMRepeaterTransform::BMRepeaterTransform(const QJsonObject &definition, BMBase *parent)
{
    setParent(parent);
    construct(definition);
}

BMBase *BMRepeaterTransform::clone() const
{
    return new BMRepeaterTransform(*this);
}

void BMRepeaterTransform::construct(const QJsonObject &definition)
{
    qCDebug(lcLottieQtBodymovinParser) << "BMRepeaterTransform::construct():" << name();

    BMBasicTransform::construct(definition);
    if (m_hidden)
        return;

    QJsonObject startOpacity = definition.value(QLatin1String("so")).toObject();
    startOpacity = resolveExpression(startOpacity);
    m_startOpacity.construct(startOpacity);

    QJsonObject endOpacity = definition.value(QLatin1String("eo")).toObject();
    endOpacity = resolveExpression(endOpacity);
    m_endOpacity.construct(endOpacity);
}

void BMRepeaterTransform::updateProperties(int frame)
{
    BMBasicTransform::updateProperties(frame);

    m_startOpacity.update(frame);
    m_endOpacity.update(frame);

    m_opacities.clear();
    for (int i = 0; i < m_copies; i++) {
        qreal opacity = m_startOpacity.value() +
                (m_endOpacity.value() - m_startOpacity.value()) * i / m_copies;
        m_opacities.push_back(opacity);
    }
}

void BMRepeaterTransform::render(LottieRenderer &renderer) const
{
    renderer.render(*this);
}

void BMRepeaterTransform::setInstanceCount(int copies)
{
    m_copies = copies;
}

qreal BMRepeaterTransform::opacityAtInstance(int instance) const
{
    return m_opacities.at(instance) / 100.0;
}

qreal BMRepeaterTransform::startOpacity() const
{
    return m_startOpacity.value();
}

qreal BMRepeaterTransform::endOpacity() const
{
    return m_endOpacity.value();
}

QT_END_NAMESPACE