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Stroke adjustment/soft masks clarification

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This commit is contained in:
Jakub Melka 2020-08-09 14:08:31 +02:00
parent ccff2095e4
commit 8262654b0e
3 changed files with 63 additions and 11 deletions
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59
PdfForQtLib/sources/pdfpagecontentprocessor.cpp
View File

@ -1743,6 +1743,20 @@ void PDFPageContentProcessor::processApplyGraphicState(const PDFDictionary* grap
QByteArray blendModeName = loader.readNameFromDictionary(graphicStateDictionary, "BM");
QByteArray renderingIntentName = loader.readNameFromDictionary(graphicStateDictionary, "RI");
const bool alphaIsShape = loader.readBooleanFromDictionary(graphicStateDictionary, "AIS", m_graphicState.getAlphaIsShape());
const bool strokeAdjustment = loader.readBooleanFromDictionary(graphicStateDictionary, "SA", m_graphicState.getStrokeAdjustment());
const PDFDictionary* softMask = m_document->getDictionaryFromObject(graphicStateDictionary->get("SMask"));
// We will try to get blend mode name from the array (if BM is array). First supported blend mode should
// be used. In PDF 2.0, array is deprecated, so for backward compatibility, we extract first blend mode
// name from the array and try to use it.
if (blendModeName.isEmpty())
{
std::vector<QByteArray> blendModeNames = loader.readNameArrayFromDictionary(graphicStateDictionary, "BM");
if (!blendModeNames.empty())
{
blendModeName = qMove(blendModeNames.front());
}
}
if (!blendModeName.isEmpty())
{
@ -1781,6 +1795,8 @@ void PDFPageContentProcessor::processApplyGraphicState(const PDFDictionary* grap
m_graphicState.setAlphaFilling(fillingAlpha);
m_graphicState.setOverprintMode(overprintMode);
m_graphicState.setAlphaIsShape(alphaIsShape);
m_graphicState.setStrokeAdjustment(strokeAdjustment);
m_graphicState.setSoftMask(softMask);
updateGraphicState();
if (graphicStateDictionary->hasKey("Font"))
@ -1797,17 +1813,6 @@ void PDFPageContentProcessor::processApplyGraphicState(const PDFDictionary* grap
}
}
}
if (graphicStateDictionary->hasKey("SMask"))
{
const PDFObject& softMaskObject = m_document->getObject(graphicStateDictionary->get("SMask"));
bool isNone = (softMaskObject.isName() && softMaskObject.getString() == "None");
if (!isNone)
{
reportRenderErrorOnce(RenderErrorType::NotSupported, PDFTranslationContext::tr("Soft masks not supported."));
}
}
}
void PDFPageContentProcessor::operatorSetGraphicState(PDFOperandName dictionaryName)
@ -3201,6 +3206,8 @@ PDFPageContentProcessor::PDFPageContentProcessorState::PDFPageContentProcessorSt
m_renderingIntent(RenderingIntent::Perceptual),
m_overprintMode(),
m_alphaIsShape(false),
m_strokeAdjustment(false),
m_softMask(nullptr),
m_stateFlags(StateUnchanged)
{
m_fillColorSpace.reset(new PDFDeviceGrayColorSpace);
@ -3244,6 +3251,8 @@ PDFPageContentProcessor::PDFPageContentProcessorState& PDFPageContentProcessor::
setRenderingIntent(other.getRenderingIntent());
setOverprintMode(other.getOverprintMode());
setAlphaIsShape(other.getAlphaIsShape());
setStrokeAdjustment(other.getStrokeAdjustment());
setSoftMask(other.getSoftMask());
return *this;
}
@ -3468,6 +3477,34 @@ void PDFPageContentProcessor::PDFPageContentProcessorState::setAlphaIsShape(bool
}
}
bool PDFPageContentProcessor::PDFPageContentProcessorState::getStrokeAdjustment() const
{
return m_strokeAdjustment;
}
void PDFPageContentProcessor::PDFPageContentProcessorState::setStrokeAdjustment(bool strokeAdjustment)
{
if (m_strokeAdjustment != strokeAdjustment)
{
m_strokeAdjustment = strokeAdjustment;
m_stateFlags |= StateStrokeAdjustment;
}
}
const PDFDictionary* PDFPageContentProcessor::PDFPageContentProcessorState::getSoftMask() const
{
return m_softMask;
}
void PDFPageContentProcessor::PDFPageContentProcessorState::setSoftMask(const PDFDictionary* softMask)
{
if (m_softMask != softMask)
{
m_softMask = softMask;
m_stateFlags |= StateSoftMask;
}
}
void PDFPageContentProcessor::PDFPageContentProcessorState::setTextMatrix(const QMatrix& textMatrix)
{
if (m_textMatrix != textMatrix)

10
PdfForQtLib/sources/pdfpagecontentprocessor.h
View File

@ -306,6 +306,8 @@ protected:
StateRenderingIntent = 0x08000000,
StateOverprint = 0x10000000,
StateAlphaIsShape = 0x20000000,
StateStrokeAdjustment = 0x40000000,
StateSoftMask = 0x80000000,
StateAll = 0xFFFFFFFF
};
@ -410,6 +412,12 @@ protected:
bool getAlphaIsShape() const { return m_alphaIsShape; }
void setAlphaIsShape(bool alphaIsShape);
bool getStrokeAdjustment() const;
void setStrokeAdjustment(bool strokeAdjustment);
const PDFDictionary* getSoftMask() const;
void setSoftMask(const PDFDictionary* softMask);
private:
QMatrix m_currentTransformationMatrix;
PDFColorSpacePointer m_strokeColorSpace;
@ -441,6 +449,8 @@ protected:
RenderingIntent m_renderingIntent;
PDFOverprintMode m_overprintMode;
bool m_alphaIsShape;
bool m_strokeAdjustment;
const PDFDictionary* m_softMask;
StateFlags m_stateFlags;
};

5
PdfForQtLib/sources/pdfpainter.cpp
View File

@ -89,6 +89,11 @@ void PDFPainterBase::performUpdateGraphicsState(const PDFPageContentProcessorSta
}
}
if (flags.testFlag(PDFPageContentProcessorState::StateSoftMask) && state.getSoftMask())
{
reportRenderErrorOnce(RenderErrorType::NotSupported, PDFTranslationContext::tr("Soft masks not supported."));
}
BaseClass::performUpdateGraphicsState(state);
}