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Bugfixing for patterns

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This commit is contained in:
Jakub Melka
2019-09-13 16:28:20 +02:00
parent 6326eb35eb
commit 0d048fccbd
5 changed files with 186 additions and 66 deletions
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12
PdfForQtLib/sources/pdfcolorspaces.cpp
View File

@ -350,12 +350,11 @@ PDFColorSpacePointer PDFAbstractColorSpace::createColorSpaceImpl(const PDFDictio
{
stream = colorSpaceSettings.getStream();
}
}
if (name == COLOR_SPACE_NAME_PATTERN)
{
PDFPatternPtr pattern = PDFPattern::createPattern(colorSpaceDictionary, document, array->getItem(1));
return PDFColorSpacePointer(new PDFPatternColorSpace(qMove(pattern)));
}
return PDFColorSpacePointer(new PDFPatternColorSpace(std::make_shared<PDFInvalidPattern>()));
}
if (dictionary)
@ -414,6 +413,11 @@ PDFColorSpacePointer PDFAbstractColorSpace::createDeviceColorSpaceByNameImpl(con
throw PDFParserException(PDFTranslationContext::tr("Can't load color space, because color space structure is too complex."));
}
if (name == COLOR_SPACE_NAME_PATTERN)
{
return PDFColorSpacePointer(new PDFPatternColorSpace(std::make_shared<PDFInvalidPattern>()));
}
if (name == COLOR_SPACE_NAME_DEVICE_GRAY || name == COLOR_SPACE_NAME_ABBREVIATION_DEVICE_GRAY)
{
if (colorSpaceDictionary && colorSpaceDictionary->hasKey(COLOR_SPACE_NAME_DEFAULT_GRAY))
@ -985,7 +989,7 @@ const unsigned char* PDFImageData::getRow(unsigned int rowIndex) const
QColor PDFPatternColorSpace::getDefaultColor() const
{
throw PDFParserException(PDFTranslationContext::tr("Pattern doesn't have default color."));
return QColor(Qt::transparent);
}
QColor PDFPatternColorSpace::getColor(const PDFColor& color) const

116
PdfForQtLib/sources/pdfpagecontentprocessor.cpp
View File

@ -177,6 +177,7 @@ void PDFPageContentProcessor::initDictionaries(const PDFObject& resourcesObject)
m_extendedGraphicStateDictionary = getDictionary(PDF_RESOURCE_EXTGSTATE);
m_propertiesDictionary = getDictionary("Properties");
m_shadingDictionary = getDictionary("Shading");
m_patternDictionary = getDictionary("Pattern");
}
PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page,
@ -194,6 +195,7 @@ PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page,
m_extendedGraphicStateDictionary(nullptr),
m_propertiesDictionary(nullptr),
m_shadingDictionary(nullptr),
m_patternDictionary(nullptr),
m_textBeginEndState(0),
m_compatibilityBeginEndState(0),
m_patternBaseMatrix(pagePointToDevicePointMatrix),
@ -595,8 +597,19 @@ void PDFPageContentProcessor::processPathPainting(const QPainterPath& path, bool
const PDFPattern* pattern = getGraphicState()->getFillColorSpace()->getPattern();
if (pattern)
{
if (const PDFShadingPattern* shadingPatern = pattern->getShadingPattern())
switch (pattern->getType())
{
case PatternType::Tiling:
{
// TODO: Implement tiling pattern
throw PDFParserException(PDFTranslationContext::tr("Tiling pattern not implemented."));
break;
}
case PatternType::Shading:
{
const PDFShadingPattern* shadingPatern = pattern->getShadingPattern();
// We must create a mesh and then draw pattern
PDFMeshQualitySettings settings;
settings.deviceSpaceMeshingArea = getPageBoundingRectDeviceSpace();
@ -611,11 +624,20 @@ void PDFPageContentProcessor::processPathPainting(const QPainterPath& path, bool
mesh.setBoundingPath(boundingPath);
performMeshPainting(mesh);
break;
}
else
case PatternType::Invalid:
{
throw PDFParserException(PDFTranslationContext::tr("Invalid pattern."));
break;
}
default:
{
// TODO: Implement tiling pattern
Q_ASSERT(false);
break;
}
}
fill = false;
@ -627,8 +649,19 @@ void PDFPageContentProcessor::processPathPainting(const QPainterPath& path, bool
const PDFPattern* pattern = getGraphicState()->getStrokeColorSpace()->getPattern();
if (pattern)
{
if (const PDFShadingPattern* shadingPatern = pattern->getShadingPattern())
switch (pattern->getType())
{
case PatternType::Tiling:
{
// TODO: Implement tiling pattern
throw PDFParserException(PDFTranslationContext::tr("Tiling pattern not implemented."));
break;
}
case PatternType::Shading:
{
const PDFShadingPattern* shadingPatern = pattern->getShadingPattern();
// We must create a mesh and then draw pattern
PDFMeshQualitySettings settings;
settings.deviceSpaceMeshingArea = getPageBoundingRectDeviceSpace();
@ -657,11 +690,20 @@ void PDFPageContentProcessor::processPathPainting(const QPainterPath& path, bool
mesh.setBoundingPath(boundingPath);
performMeshPainting(mesh);
break;
}
else
case PatternType::Invalid:
{
throw PDFParserException(PDFTranslationContext::tr("Invalid pattern."));
break;
}
default:
{
// TODO: Implement tiling pattern
Q_ASSERT(false);
break;
}
}
stroke = false;
@ -1807,8 +1849,35 @@ void PDFPageContentProcessor::operatorColorSetStrokingColorN()
{
// In our implementation, operator 'SC' can also set color using all color spaces
// PDF reference 1.7 allows here Pattern, Separation, DeviceN and ICCBased color spaces here,
// but default operator can use them (with exception of Pattern color space).
// but default operator can use them (with exception of Pattern color space). For pattern color space,
// we treat this differently.
const PDFAbstractColorSpace* colorSpace = m_graphicState.getStrokeColorSpace();
if (colorSpace->getPattern())
{
if (m_operands.size() > 0)
{
// TODO: Implement tiling pattern colors
PDFOperandName name = readOperand<PDFOperandName>(m_operands.size() - 1);
if (m_patternDictionary && m_patternDictionary->hasKey(name.name))
{
// Create the pattern
PDFPatternPtr pattern = PDFPattern::createPattern(m_colorSpaceDictionary, m_document, m_patternDictionary->get(name.name));
m_graphicState.setStrokeColorSpace(QSharedPointer<PDFAbstractColorSpace>(new PDFPatternColorSpace(qMove(pattern))));
updateGraphicState();
return;
}
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid pattern for Pattern color space."));
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid pattern for Pattern color space."));
}
}
else
{
operatorColorSetStrokingColor();
}
}
void PDFPageContentProcessor::operatorColorSetFillingColor()
@ -1838,8 +1907,35 @@ void PDFPageContentProcessor::operatorColorSetFillingColorN()
{
// In our implementation, operator 'sc' can also set color using all color spaces
// PDF reference 1.7 allows here Pattern, Separation, DeviceN and ICCBased color spaces here,
// but default operator can use them (with exception of Pattern color space).
// but default operator can use them (with exception of Pattern color space). For pattern color space,
// we treat this differently.
const PDFAbstractColorSpace* colorSpace = m_graphicState.getFillColorSpace();
if (colorSpace->getPattern())
{
if (m_operands.size() > 0)
{
// TODO: Implement tiling pattern colors
PDFOperandName name = readOperand<PDFOperandName>(m_operands.size() - 1);
if (m_patternDictionary && m_patternDictionary->hasKey(name.name))
{
// Create the pattern
PDFPatternPtr pattern = PDFPattern::createPattern(m_colorSpaceDictionary, m_document, m_patternDictionary->get(name.name));
m_graphicState.setFillColorSpace(QSharedPointer<PDFAbstractColorSpace>(new PDFPatternColorSpace(qMove(pattern))));
updateGraphicState();
return;
}
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid pattern for Pattern color space."));
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid pattern for Pattern color space."));
}
}
else
{
operatorColorSetFillingColor();
}
}
void PDFPageContentProcessor::operatorColorSetDeviceGrayStroking(PDFReal gray)
@ -2864,7 +2960,8 @@ PDFPageContentProcessor::PDFPageContentProcessorStateGuard::PDFPageContentProces
m_xobjectDictionary(processor->m_xobjectDictionary),
m_extendedGraphicStateDictionary(processor->m_extendedGraphicStateDictionary),
m_propertiesDictionary(processor->m_propertiesDictionary),
m_shadingDictionary(processor->m_shadingDictionary)
m_shadingDictionary(processor->m_shadingDictionary),
m_patternDictionary(processor->m_patternDictionary)
{
m_processor->operatorSaveGraphicState();
}
@ -2878,6 +2975,7 @@ PDFPageContentProcessor::PDFPageContentProcessorStateGuard::~PDFPageContentProce
m_processor->m_extendedGraphicStateDictionary = m_extendedGraphicStateDictionary;
m_processor->m_propertiesDictionary = m_propertiesDictionary;
m_processor->m_shadingDictionary = m_shadingDictionary;
m_processor->m_patternDictionary = m_patternDictionary;
m_processor->operatorRestoreGraphicState();
}

2
PdfForQtLib/sources/pdfpagecontentprocessor.h
View File

@ -502,6 +502,7 @@ private:
const PDFDictionary* m_extendedGraphicStateDictionary;
const PDFDictionary* m_propertiesDictionary;
const PDFDictionary* m_shadingDictionary;
const PDFDictionary* m_patternDictionary;
};
/// Wrapper for PDF Name
@ -724,6 +725,7 @@ private:
const PDFDictionary* m_extendedGraphicStateDictionary;
const PDFDictionary* m_propertiesDictionary;
const PDFDictionary* m_shadingDictionary;
const PDFDictionary* m_patternDictionary;
// Default color spaces
PDFColorSpacePointer m_deviceGrayColorSpace;

23
PdfForQtLib/sources/pdfpattern.cpp
View File

@ -48,11 +48,6 @@ PDFPatternPtr PDFPattern::createPattern(const PDFDictionary* colorSpaceDictionar
const PDFDictionary* patternDictionary = dereferencedObject.getDictionary();
PDFDocumentDataLoaderDecorator loader(document);
if (loader.readNameFromDictionary(patternDictionary, "Type") != "Pattern")
{
throw PDFParserException(PDFTranslationContext::tr("Invalid pattern."));
}
const PatternType patternType = static_cast<PatternType>(loader.readIntegerFromDictionary(patternDictionary, "PatternType", static_cast<PDFInteger>(PatternType::Invalid)));
switch (patternType)
{
@ -89,16 +84,27 @@ PDFPatternPtr PDFPattern::createShadingPattern(const PDFDictionary* colorSpaceDi
bool ignoreBackgroundColor)
{
const PDFObject& dereferencedShadingObject = document->getObject(shadingObject);
if (!dereferencedShadingObject.isDictionary())
if (!dereferencedShadingObject.isDictionary() && !dereferencedShadingObject.isStream())
{
throw PDFParserException(PDFTranslationContext::tr("Invalid shading."));
}
PDFDocumentDataLoaderDecorator loader(document);
const PDFDictionary* shadingDictionary = dereferencedShadingObject.getDictionary();
const PDFDictionary* shadingDictionary = nullptr;
const PDFStream* stream = nullptr;
if (dereferencedShadingObject.isDictionary())
{
shadingDictionary = dereferencedShadingObject.getDictionary();
}
else if (dereferencedShadingObject.isStream())
{
stream = dereferencedShadingObject.getStream();
shadingDictionary = stream->getDictionary();
}
// Parse common data for all shadings
PDFColorSpacePointer colorSpace = PDFAbstractColorSpace::createColorSpace(colorSpaceDictionary, document, shadingDictionary->get("ColorSpace"));
PDFColorSpacePointer colorSpace = PDFAbstractColorSpace::createColorSpace(colorSpaceDictionary, document, document->getObject(shadingDictionary->get("ColorSpace")));
if (colorSpace->getPattern())
{
@ -1183,5 +1189,6 @@ PDFMesh PDFRadialShading::createMesh(const PDFMeshQualitySettings& settings) con
}
// TODO: Apply graphic state of the pattern
// TODO: Implement settings of meshing in the settings dialog
} // namespace pdf

9
PdfForQtLib/sources/pdfpattern.h
View File

@ -204,6 +204,15 @@ protected:
QMatrix m_matrix;
};
class PDFInvalidPattern : public PDFPattern
{
public:
explicit PDFInvalidPattern() = default;
virtual PatternType getType() const { return PatternType::Invalid; }
virtual const PDFShadingPattern* getShadingPattern() const { return nullptr; }
};
/// Shading pattern - smooth color distribution along the pattern's space
class PDFShadingPattern : public PDFPattern
{