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Better handling of images

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This commit is contained in:
Jakub Melka
2019-05-10 19:48:52 +02:00
parent 3358d49240
commit 4fa3c079f2
18 changed files with 331 additions and 29 deletions
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50
PdfForQtLib/sources/pdfcolorspaces.cpp
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@ -19,6 +19,7 @@
#include "pdfobject.h"
#include "pdfdocument.h"
#include "pdfexception.h"
#include "pdfutils.h"
namespace pdf
{
@ -637,6 +638,55 @@ size_t PDFIndexedColorSpace::getColorComponentCount() const
return 1;
}
QImage PDFIndexedColorSpace::getImage(const PDFImageData& imageData) const
{
if (imageData.isValid())
{
QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_RGB888);
image.fill(QColor(Qt::white));
unsigned int componentCount = imageData.getComponents();
QDataStream stream(imageData.getData(), QIODevice::ReadOnly);
PDFBitReader reader(stream, imageData.getBitsPerComponent());
/*
if (componentCount != getColorComponentCount())
{
throw PDFParserException(PDFTranslationContext::tr("Invalid colors for color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
}*/
PDFColor color;
color.resize(componentCount);
for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
{
reader.seek(i * imageData.getStride());
unsigned char* outputLine = image.scanLine(i);
for (unsigned int j = 0; j < imageData.getWidth(); ++j)
{
const unsigned char* currentData = rowData + (j * componentCount);
for (unsigned int k = 0; k < componentCount; ++k)
{
constexpr const double COEFFICIENT = 1.0 / 255.0;
color[k] = currentData[k] * COEFFICIENT;
}
QColor transformedColor = getColor(color);
QRgb rgb = transformedColor.rgb();
*outputLine++ = qRed(rgb);
*outputLine++ = qGreen(rgb);
*outputLine++ = qBlue(rgb);
}
}
return image;
}
return QImage();
}
PDFColorSpacePointer PDFIndexedColorSpace::createIndexedColorSpace(const PDFDictionary* colorSpaceDictionary,
const PDFDocument* document,
const PDFArray* array,