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Image processing for transparency renderer

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This commit is contained in:
Jakub Melka
2021-02-21 16:42:24 +01:00
parent 114dfcb895
commit d632595710
6 changed files with 610 additions and 17 deletions
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40
Pdf4QtLib/sources/pdfpagecontentprocessor.cpp
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@ -365,6 +365,12 @@ void PDFPageContentProcessor::performClipping(const QPainterPath& path, Qt::Fill
Q_UNUSED(fillRule);
}
bool PDFPageContentProcessor::performOriginalImagePainting(const PDFImage& image)
{
Q_UNUSED(image);
return false;
}
void PDFPageContentProcessor::performImagePainting(const QImage& image)
{
Q_UNUSED(image);
@ -2911,24 +2917,28 @@ void PDFPageContentProcessor::paintXObjectImage(const PDFStream* stream)
}
PDFImage pdfImage = PDFImage::createImage(m_document, stream, qMove(colorSpace), false, m_graphicState.getRenderingIntent(), this);
QImage image = pdfImage.getImage(m_CMS, this);
if (image.format() == QImage::Format_Alpha8)
if (!performOriginalImagePainting(pdfImage))
{
QSize size = image.size();
QImage unmaskedImage(size, QImage::Format_ARGB32_Premultiplied);
unmaskedImage.fill(m_graphicState.getFillColor());
unmaskedImage.setAlphaChannel(image);
image = qMove(unmaskedImage);
}
QImage image = pdfImage.getImage(m_CMS, this);
if (!image.isNull())
{
performImagePainting(image);
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Can't decode the image."));
if (image.format() == QImage::Format_Alpha8)
{
QSize size = image.size();
QImage unmaskedImage(size, QImage::Format_ARGB32_Premultiplied);
unmaskedImage.fill(m_graphicState.getFillColor());
unmaskedImage.setAlphaChannel(image);
image = qMove(unmaskedImage);
}
if (!image.isNull())
{
performImagePainting(image);
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Can't decode the image."));
}
}
}