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Mask image

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This commit is contained in:
Jakub Melka
2019-10-19 11:08:37 +02:00
parent 14419980cc
commit ac644c16a4
3 changed files with 26 additions and 6 deletions
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26
PdfForQtLib/sources/pdfimage.cpp
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@ -125,10 +125,28 @@ PDFImage PDFImage::createImage(const PDFDocument* document,
}
else if (object.isStream())
{
// TODO: Implement Mask Image
PDFImage maskImage = createImage(document, object.getStream(), colorSpace, false, renderingIntent, errorReporter);
maskingType = PDFImageData::MaskingType::Image;
throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Mask image is not implemented."));
PDFImage softMaskImage = createImage(document, object.getStream(), colorSpace, false, renderingIntent, errorReporter);
if (softMaskImage.m_imageData.getMaskingType() != PDFImageData::MaskingType::ImageMask ||
softMaskImage.m_imageData.getColorChannels() != 1 ||
softMaskImage.m_imageData.getBitsPerComponent() != 1)
{
throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Invalid mask image."));
}
// We must alter decode, because it has opposite meaning (it is transparency)
std::vector<PDFReal> decode = softMaskImage.m_imageData.getDecode();
if (decode.size() < 2)
{
decode = { 0.0, 1.0};
}
std::swap(decode[0], decode[1]);
// Create soft mask from image
maskingType = PDFImageData::MaskingType::SoftMask;
image.m_softMask = qMove(softMaskImage.m_imageData);
image.m_softMask.setMaskingType(PDFImageData::MaskingType::None);
image.m_softMask.setDecode(qMove(decode));
}
}
else if (dictionary->hasKey("SMask"))