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ImageMask 1-bit images

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Jakub Melka
2019-06-15 17:40:22 +02:00
parent 630afbba61
commit 84f26180c5
6 changed files with 137 additions and 31 deletions
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48
PdfForQtLib/sources/pdfcolorspaces.cpp
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@@ -103,13 +103,20 @@ QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
throw PDFParserException(PDFTranslationContext::tr("Invalid colors for color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
}
const std::vector<PDFReal>& decode = imageData.getDecode();
if (!decode.empty() && decode.size() != componentCount * 2)
{
throw PDFParserException(PDFTranslationContext::tr("Invalid size of the decoded array. Expected %1, actual %2.").arg(componentCount * 2).arg(decode.size()));
}
QDataStream stream(const_cast<QByteArray*>(&imageData.getData()), QIODevice::ReadOnly);
PDFBitReader reader(&stream, imageData.getBitsPerComponent());
PDFColor color;
color.resize(componentCount);
const double coefficient = 1.0 / reader.max();
const double max = reader.max();
const double coefficient = 1.0 / max;
for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
{
reader.seek(i * imageData.getStride());
@@ -119,8 +126,17 @@ QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
{
for (unsigned int k = 0; k < componentCount; ++k)
{
PDFBitReader::Value value = reader.read();
color[k] = value * coefficient;
PDFReal value = reader.read();
// Interpolate value, if it is not empty
if (!decode.empty())
{
color[k] = interpolate(value, 0.0, max, decode[2 * k], decode[2 * k + 1]);
}
else
{
color[k] = value * coefficient;
}
}
QColor transformedColor = getColor(color);
@@ -147,19 +163,26 @@ QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
}
Q_ASSERT(componentCount > 0);
std::vector<PDFInteger> colorKeyMask = imageData.getColorKeyMask();
const std::vector<PDFInteger>& colorKeyMask = imageData.getColorKeyMask();
if (colorKeyMask.size() / 2 != componentCount)
{
throw PDFParserException(PDFTranslationContext::tr("Invalid number of color components in color key mask. Expected %1, provided %2.").arg(2 * componentCount).arg(colorKeyMask.size()));
}
const std::vector<PDFReal>& decode = imageData.getDecode();
if (!decode.empty() && decode.size() != componentCount * 2)
{
throw PDFParserException(PDFTranslationContext::tr("Invalid size of the decoded array. Expected %1, actual %2.").arg(componentCount * 2).arg(decode.size()));
}
QDataStream stream(const_cast<QByteArray*>(&imageData.getData()), QIODevice::ReadOnly);
PDFBitReader reader(&stream, imageData.getBitsPerComponent());
PDFColor color;
color.resize(componentCount);
const double coefficient = 1.0 / reader.max();
const double max = reader.max();
const double coefficient = 1.0 / max;
for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
{
reader.seek(i * imageData.getStride());
@@ -173,11 +196,20 @@ QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
for (unsigned int k = 0; k < componentCount; ++k)
{
PDFBitReader::Value value = reader.read();
color[k] = value * coefficient;
// Interpolate value, if it is not empty
if (!decode.empty())
{
color[k] = interpolate(value, 0.0, max, decode[2 * k], decode[2 * k + 1]);
}
else
{
color[k] = value * coefficient;
}
Q_ASSERT(2 * k + 1 < colorKeyMask.size());
if (static_cast<decltype(colorKeyMask)::value_type>(value) >= colorKeyMask[2 * k] &&
static_cast<decltype(colorKeyMask)::value_type>(value) <= colorKeyMask[2 * k + 1])
if (static_cast<std::decay<decltype(colorKeyMask)>::type::value_type>(value) >= colorKeyMask[2 * k] &&
static_cast<std::decay<decltype(colorKeyMask)>::type::value_type>(value) <= colorKeyMask[2 * k + 1])
{
++maskedColors;
}