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Display of ink coverage

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Jakub Melka
2021-04-02 20:20:53 +02:00
parent 63376400da
commit 4921b61cf9
6 changed files with 141 additions and 0 deletions
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39
Pdf4QtLib/sources/pdfutils.cpp
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@ -518,4 +518,43 @@ QString PDFSysUtils::getUserName()
return userName;
}
PDFColorScale::PDFColorScale(PDFReal min, PDFReal max) :
m_min(min),
m_max(max)
{
m_colorScales = {
Qt::blue,
Qt::cyan,
Qt::green,
Qt::yellow,
Qt::red
};
}
QColor PDFColorScale::map(PDFReal value) const
{
PDFReal correctedValue = qBound(m_min, value, m_max);
PDFReal intervalValue = interpolate(correctedValue, m_min, m_max, 0.0, PDFReal(m_colorScales.size() - 1));
PDFReal indexValue = qFloor(intervalValue);
int index = indexValue;
PDFReal fractionValue = intervalValue - index;
if (index == int(m_colorScales.size()) - 1)
{
--index;
fractionValue = 1.0;
}
Q_ASSERT(index + 1 < m_colorScales.size());
const QColor& leftValue = m_colorScales[index];
const QColor& rightValue = m_colorScales[index + 1];
qreal r = (1.0 - fractionValue) * leftValue.redF() + fractionValue * rightValue.redF();
qreal g = (1.0 - fractionValue) * leftValue.greenF() + fractionValue * rightValue.greenF();
qreal b = (1.0 - fractionValue) * leftValue.blueF() + fractionValue * rightValue.blueF();
return QColor::fromRgbF(r, g, b);
}
} // namespace pdf