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DeviceN color space

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Jakub Melka
2019-09-01 14:42:32 +02:00
parent 31eae284c2
commit 3e345a768f
5 changed files with 260 additions and 23 deletions
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24
PdfForQtLib/sources/pdffunction.cpp
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@ -598,28 +598,12 @@ PDFFunction::FunctionResult PDFStitchingFunction::apply(const_iterator x_1,
// First search for partial function, which defines our range. Use algorithm
// similar to the std::lower_bound.
size_t count = m_partialFunctions.size();
size_t functionIndex = 0;
while (count > 0)
auto it = std::lower_bound(m_partialFunctions.cbegin(), m_partialFunctions.cend(), x, [](const auto& partialFunction, PDFReal value) { return partialFunction.bound1 < value; });
if (it == m_partialFunctions.cend())
{
const size_t step = count / 2;
const size_t current = functionIndex + step;
if (m_partialFunctions[current].bound1 < x)
{
functionIndex = current + 1;
count = count - functionIndex;
}
else
{
count = current;
}
--it;
}
if (functionIndex == m_partialFunctions.size())
{
--functionIndex;
}
const PartialFunction& function = m_partialFunctions[functionIndex];
const PartialFunction& function = *it;
// Encode the value into the input range of the function
const PDFReal xEncoded = interpolate(x, function.bound0, function.bound1, function.encode0, function.encode1);