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Document content flow basics

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This commit is contained in:
Jakub Melka
2020-10-17 16:56:39 +02:00
parent b0f8e1f1e3
commit 0ccdb1e46f
10 changed files with 664 additions and 290 deletions
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62
PdfForQtLib/sources/pdfpagecontentprocessor.cpp
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@ -244,11 +244,14 @@ PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page,
m_drawingUncoloredTilingPatternState(0),
m_patternBaseMatrix(pagePointToDevicePointMatrix),
m_pagePointToDevicePointMatrix(pagePointToDevicePointMatrix),
m_meshQualitySettings(meshQualitySettings)
m_meshQualitySettings(meshQualitySettings),
m_structuralParentKey(0)
{
Q_ASSERT(page);
Q_ASSERT(document);
m_structuralParentKey = page->getStructureParentKey();
PDFExecutionPolicy::startProcessingContentStream();
QPainterPath pageRectPath;
@ -338,6 +341,7 @@ QList<PDFRenderError> PDFPageContentProcessor::processContents()
}
}
finishMarkedContent();
return m_errorList;
}
@ -659,9 +663,11 @@ void PDFPageContentProcessor::processForm(const QMatrix& matrix,
const QRectF& boundingBox,
const PDFObject& resources,
const PDFObject& transparencyGroup,
const QByteArray& content)
const QByteArray& content,
PDFInteger formStructuralParent)
{
PDFPageContentProcessorStateGuard guard(this);
PDFTemporaryValueChange structuralParentChangeGuard(&m_structuralParentKey, formStructuralParent);
std::unique_ptr<PDFTransparencyGroupGuard> guard2;
if (transparencyGroup.isDictionary())
@ -1738,6 +1744,19 @@ void PDFPageContentProcessor::setRenderingIntentByName(QByteArray renderingInten
m_graphicState.setRenderingIntentName(renderingIntentName);
}
void PDFPageContentProcessor::finishMarkedContent()
{
if (!m_markedContentStack.empty())
{
m_errorList.append(PDFRenderError(RenderErrorType::Error, PDFTranslationContext::tr("Marked content is not well formed (not enough EMC operators).")));
}
while (!m_markedContentStack.empty())
{
operatorMarkedContentEnd();
}
}
void PDFPageContentProcessor::reportRenderErrorOnce(RenderErrorType type, QString message)
{
if (!m_onceReportedErrors.count(message))
@ -2936,7 +2955,10 @@ void PDFPageContentProcessor::operatorPaintXObject(PDFPageContentProcessor::PDFO
// Transparency group
PDFObject transparencyGroup = m_document->getObject(streamDictionary->get("Group"));
processForm(transformationMatrix, boundingBox, resources, transparencyGroup, content);
// Form structural parent key
const PDFInteger formStructuralParentKey = loader.readIntegerFromDictionary(streamDictionary, "StructParent", m_structuralParentKey);
processForm(transformationMatrix, boundingBox, resources, transparencyGroup, content, formStructuralParentKey);
}
else
{
@ -3075,32 +3097,34 @@ void PDFPageContentProcessor::drawText(const TextSequence& textSequence)
if (item.glyph)
{
const QPainterPath& glyphPath = *item.glyph;
QMatrix textRenderingMatrix = adjustMatrix * textMatrix;
QMatrix toDeviceSpaceTransform = textRenderingMatrix * m_graphicState.getCurrentTransformationMatrix();
if (!glyphPath.isEmpty())
{
QMatrix textRenderingMatrix = adjustMatrix * textMatrix;
QMatrix toDeviceSpaceTransform = textRenderingMatrix * m_graphicState.getCurrentTransformationMatrix();
QPainterPath transformedGlyph = textRenderingMatrix.map(glyphPath);
processPathPainting(transformedGlyph, stroke, fill, true, transformedGlyph.fillRule());
if (!item.character.isNull() && !item.character.isSpace())
{
// Output character
PDFTextCharacterInfo info;
info.character = item.character;
info.isVerticalWritingSystem = !isHorizontalWritingSystem;
info.advance = item.advance;
info.fontSize = fontSize;
info.outline = glyphPath;
info.matrix = toDeviceSpaceTransform;
performOutputCharacter(info);
}
if (clipped)
{
// Clipping is enabled, we must transform to the device coordinates
m_textClippingPath = m_textClippingPath.united(toDeviceSpaceTransform.map(glyphPath));
}
}
if (!item.character.isNull())
{
// Output character
PDFTextCharacterInfo info;
info.character = item.character;
info.isVerticalWritingSystem = !isHorizontalWritingSystem;
info.advance = item.advance;
info.fontSize = fontSize;
info.outline = glyphPath;
info.matrix = toDeviceSpaceTransform;
performOutputCharacter(info);
}
}
displacementX = advance.x();
@ -3170,7 +3194,7 @@ void PDFPageContentProcessor::drawText(const TextSequence& textSequence)
processContent(*item.characterContentStream);
if (!item.character.isNull() && !item.character.isSpace())
if (!item.character.isNull())
{
// Output character
PDFTextCharacterInfo info;