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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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2
PdfForQtLib/sources/pdfcolorspaces.cpp
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@ -1088,7 +1088,7 @@ PDFColorSpacePointer PDFIndexedColorSpace::createIndexedColorSpace(const PDFDict
const int colorCount = maxValue - MIN_VALUE + 1; const int colorCount = maxValue - MIN_VALUE + 1;
const int componentCount = static_cast<int>(baseColorSpace->getColorComponentCount()); const int componentCount = static_cast<int>(baseColorSpace->getColorComponentCount());
const int byteCount = colorCount * componentCount; const int byteCount = colorCount * componentCount;
if (byteCount != colors.size()) if (byteCount > colors.size())
{ {
throw PDFException(PDFTranslationContext::tr("Invalid colors for indexed color space. Color space has %1 colors, %2 color components and must have %3 size. Provided size is %4.").arg(colorCount).arg(componentCount).arg(byteCount).arg(colors.size())); throw PDFException(PDFTranslationContext::tr("Invalid colors for indexed color space. Color space has %1 colors, %2 color components and must have %3 size. Provided size is %4.").arg(colorCount).arg(componentCount).arg(byteCount).arg(colors.size()));
} }

4
PdfForQtLib/sources/pdfcolorspaces.h
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@ -85,7 +85,6 @@ public:
{ {
None, None,
ColorKeyMasking, ///< Masking by color key ColorKeyMasking, ///< Masking by color key
Image, ///< Masking by image with alpha mask
ImageMask, ///< Masking by 1-bit image (see "ImageMask" entry in image's dictionary), current color from the graphic state is used to paint an image ImageMask, ///< Masking by 1-bit image (see "ImageMask" entry in image's dictionary), current color from the graphic state is used to paint an image
SoftMask, ///< Image is masked by soft mask SoftMask, ///< Image is masked by soft mask
}; };
@ -136,6 +135,9 @@ public:
const std::vector<PDFReal>& getDecode() const { return m_decode; } const std::vector<PDFReal>& getDecode() const { return m_decode; }
const std::vector<PDFReal>& getMatte() const { return m_matte; } const std::vector<PDFReal>& getMatte() const { return m_matte; }
void setMaskingType(MaskingType maskingType) { m_maskingType = maskingType; }
void setDecode(std::vector<PDFReal> decode) { m_decode = qMove(decode); }
/// Returns number of color channels /// Returns number of color channels
unsigned int getColorChannels() const { return m_components; } unsigned int getColorChannels() const { return m_components; }

26
PdfForQtLib/sources/pdfimage.cpp
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@ -125,10 +125,28 @@ PDFImage PDFImage::createImage(const PDFDocument* document,
} }
else if (object.isStream()) else if (object.isStream())
{ {
// TODO: Implement Mask Image PDFImage softMaskImage = createImage(document, object.getStream(), colorSpace, false, renderingIntent, errorReporter);
PDFImage maskImage = createImage(document, object.getStream(), colorSpace, false, renderingIntent, errorReporter);
maskingType = PDFImageData::MaskingType::Image; if (softMaskImage.m_imageData.getMaskingType() != PDFImageData::MaskingType::ImageMask ||
throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Mask image is not implemented.")); 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")) else if (dictionary->hasKey("SMask"))