mirror of
https://github.com/JakubMelka/PDF4QT.git
synced 2025-06-05 21:59:17 +02:00
Refactoring of annotation drawing
This commit is contained in:
Jakub Melka
@ -1084,157 +1084,222 @@ void PDFAnnotationManager::drawPage(QPainter* painter,
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Q_ASSERT(m_cmsManager);
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Q_ASSERT(m_cmsManager);
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Q_ASSERT(m_optionalActivity);
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Q_ASSERT(m_optionalActivity);
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int fontCacheLock = 0;
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const PDFCMSPointer cms = m_cmsManager->getCurrentCMS();
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const PDFCMSPointer cms = m_cmsManager->getCurrentCMS();
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m_fontCache->setCacheShrinkEnabled(this, false);
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m_fontCache->setCacheShrinkEnabled(&fontCacheLock, false);
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const PageAnnotation* annotationDrawnByEditor = nullptr;
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for (const PageAnnotation& annotation : annotations.annotations)
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for (const PageAnnotation& annotation : annotations.annotations)
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{
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{
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try
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// If annotation draw is not enabled, then skip it
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if (!isAnnotationDrawEnabled(annotation))
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{
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{
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const PDFAnnotation::Flags annotationFlags = annotation.annotation->getEffectiveFlags();
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if (annotationFlags.testFlag(PDFAnnotation::Hidden) || // Annotation is completely hidden
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(m_target == Target::Print && !annotationFlags.testFlag(PDFAnnotation::Print)) || // Target is print and annotation is marked as not printed
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(m_target == Target::View && annotationFlags.testFlag(PDFAnnotation::NoView)) || // Target is view, and annotation is disabled for screen
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annotation.annotation->isReplyTo()) // Annotation is reply to another annotation, display just the first annotation
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{
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continue;
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}
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const PDFFormFieldWidgetEditor* editor = nullptr;
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const bool isWidget = annotation.annotation->getType() == AnnotationType::Widget;
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if (isWidget && m_formManager)
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{
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editor = m_formManager->getEditor(m_formManager->getFormFieldForWidget(annotation.annotation->getSelfReference()));
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}
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const bool isEditorDrawEnabled = editor && editor->isEditorDrawEnabled();
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PDFObject appearanceStreamObject = m_document->getObject(getAppearanceStream(annotation));
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if (!appearanceStreamObject.isStream() || isEditorDrawEnabled)
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{
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// Object is not valid appearance stream. We will try to draw default
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// annotation appearance, but we must consider also optional content.
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// We do not draw annotation, if it is not ignored and annotation
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// has reference to optional content.
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if (!m_features.testFlag(PDFRenderer::IgnoreOptionalContent) &&
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annotation.annotation->getOptionalContent().isValid())
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{
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continue;
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}
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QRectF annotationRectangle = annotation.annotation->getRectangle();
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{
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PDFPainterStateGuard guard(painter);
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painter->setRenderHint(QPainter::Antialiasing, true);
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painter->setWorldMatrix(pagePointToDevicePointMatrix, true);
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AnnotationDrawParameters parameters;
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parameters.painter = painter;
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parameters.annotation = annotation.annotation.data();
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parameters.formManager = m_formManager;
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parameters.key = std::make_pair(annotation.appearance, annotation.annotation->getAppearanceState());
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parameters.invertColors = m_features.testFlag(PDFRenderer::InvertColors);
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annotation.annotation->draw(parameters);
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if (parameters.boundingRectangle.isValid())
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{
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annotationRectangle = parameters.boundingRectangle;
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}
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}
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// Draw highlighting of fields, but only, if target is View,
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// we do not want to render form field highlight, when we are
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// printing to the printer.
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if (m_target == Target::View && !isEditorDrawEnabled)
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{
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PDFPainterStateGuard guard(painter);
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drawWidgetAnnotationHighlight(annotationRectangle, annotation.annotation.get(), painter, pagePointToDevicePointMatrix);
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}
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continue;
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}
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PDFDocumentDataLoaderDecorator loader(m_document);
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const PDFStream* formStream = appearanceStreamObject.getStream();
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const PDFDictionary* formDictionary = formStream->getDictionary();
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QRectF annotationRectangle = annotation.annotation->getRectangle();
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QRectF formBoundingBox = loader.readRectangle(formDictionary->get("BBox"), QRectF());
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QMatrix formMatrix = loader.readMatrixFromDictionary(formDictionary, "Matrix", QMatrix());
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QByteArray content = m_document->getDecodedStream(formStream);
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PDFObject resources = m_document->getObject(formDictionary->get("Resources"));
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PDFObject transparencyGroup = m_document->getObject(formDictionary->get("Group"));
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if (formBoundingBox.isEmpty() || annotationRectangle.isEmpty())
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{
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// Form bounding box is empty
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continue;
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}
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QMatrix userSpaceToDeviceSpace = prepareTransformations(pagePointToDevicePointMatrix, painter->device(), annotationFlags, page, annotationRectangle);
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if (annotationFlags.testFlag(PDFAnnotation::NoZoom))
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{
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features.setFlag(PDFRenderer::ClipToCropBox, false);
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}
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// Jakub Melka: perform algorithm 8.1, defined in PDF 1.7 reference,
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// chapter 8.4.4 Appearance streams.
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// Step 1) - calculate transformed appearance box
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QRectF transformedAppearanceBox = formMatrix.mapRect(formBoundingBox);
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// Step 2) - calculate matrix A, which maps from form space to annotation space
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// Matrix A transforms from transformed appearance box space to the
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// annotation rectangle.
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const PDFReal scaleX = annotationRectangle.width() / transformedAppearanceBox.width();
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const PDFReal scaleY = annotationRectangle.height() / transformedAppearanceBox.height();
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const PDFReal translateX = annotationRectangle.left() - transformedAppearanceBox.left() * scaleX;
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const PDFReal translateY = annotationRectangle.bottom() - transformedAppearanceBox.bottom() * scaleY;
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QMatrix A(scaleX, 0.0, 0.0, scaleY, translateX, translateY);
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// Step 3) - compute final matrix AA
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QMatrix AA = formMatrix * A;
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bool isContentVisible = false;
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// Draw annotation
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{
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PDFPainterStateGuard guard(painter);
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PDFPainter pdfPainter(painter, features, userSpaceToDeviceSpace, page, m_document, m_fontCache, cms.get(), m_optionalActivity, m_meshQualitySettings);
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pdfPainter.initializeProcessor();
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// Jakub Melka: we must check, that we do not display annotation disabled by optional content
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PDFObjectReference oc = annotation.annotation->getOptionalContent();
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isContentVisible = !oc.isValid() || !pdfPainter.isContentSuppressedByOC(oc);
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if (isContentVisible)
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{
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pdfPainter.processForm(AA, formBoundingBox, resources, transparencyGroup, content);
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}
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}
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// Draw highlighting of fields, but only, if target is View,
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// we do not want to render form field highlight, when we are
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// printing to the printer.
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if (isContentVisible && m_target == Target::View)
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{
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PDFPainterStateGuard guard(painter);
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painter->resetMatrix();
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drawWidgetAnnotationHighlight(annotationRectangle, annotation.annotation.get(), painter, userSpaceToDeviceSpace);
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}
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}
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catch (PDFException exception)
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{
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errors.push_back(PDFRenderError(RenderErrorType::Error, exception.getMessage()));
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continue;
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continue;
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}
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}
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catch (PDFRendererException exception)
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if (isAnnotationDrawnByEditor(annotation))
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{
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{
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errors.push_back(exception.getError());
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Q_ASSERT(!annotationDrawnByEditor);
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annotationDrawnByEditor = &annotation;
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continue;
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continue;
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}
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}
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drawAnnotation(annotation, pagePointToDevicePointMatrix, page, cms.data(), false, errors, painter);
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}
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}
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m_fontCache->setCacheShrinkEnabled(this, true);
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if (annotationDrawnByEditor)
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{
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drawAnnotation(*annotationDrawnByEditor, pagePointToDevicePointMatrix, page, cms.data(), true, errors, painter);
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}
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m_fontCache->setCacheShrinkEnabled(&fontCacheLock, true);
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}
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}
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void PDFAnnotationManager::drawAnnotation(const PageAnnotation& annotation,
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const QMatrix& pagePointToDevicePointMatrix,
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const PDFPage* page,
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const PDFCMS* cms,
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bool isEditorDrawEnabled,
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QList<PDFRenderError>& errors,
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QPainter* painter) const
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{
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try
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{
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PDFObject appearanceStreamObject = m_document->getObject(getAppearanceStream(annotation));
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if (!appearanceStreamObject.isStream() || isEditorDrawEnabled)
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{
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// Object is not valid appearance stream. We will try to draw default
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// annotation appearance, but we must consider also optional content.
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// We do not draw annotation, if it is not ignored and annotation
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// has reference to optional content.
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drawAnnotationDirect(annotation, pagePointToDevicePointMatrix, page, cms, isEditorDrawEnabled, painter);
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}
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else
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{
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drawAnnotationUsingAppearanceStream(annotation, appearanceStreamObject, pagePointToDevicePointMatrix, page, cms, painter);
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}
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}
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catch (PDFException exception)
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{
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errors.push_back(PDFRenderError(RenderErrorType::Error, exception.getMessage()));
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}
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catch (PDFRendererException exception)
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{
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errors.push_back(exception.getError());
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}
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}
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bool PDFAnnotationManager::isAnnotationDrawEnabled(const PageAnnotation& annotation) const
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{
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const PDFAnnotation::Flags annotationFlags = annotation.annotation->getEffectiveFlags();
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return !(annotationFlags.testFlag(PDFAnnotation::Hidden) || // Annotation is completely hidden
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(m_target == Target::Print && !annotationFlags.testFlag(PDFAnnotation::Print)) || // Target is print and annotation is marked as not printed
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(m_target == Target::View && annotationFlags.testFlag(PDFAnnotation::NoView)) || // Target is view, and annotation is disabled for screen
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annotation.annotation->isReplyTo()); // Annotation is reply to another annotation, display just the first annotation
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}
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bool PDFAnnotationManager::isAnnotationDrawnByEditor(const PageAnnotation& annotation) const
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{
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if (!m_formManager)
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{
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return false;
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}
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const PDFFormFieldWidgetEditor* editor = nullptr;
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if (annotation.annotation->getType() == AnnotationType::Widget)
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{
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editor = m_formManager->getEditor(m_formManager->getFormFieldForWidget(annotation.annotation->getSelfReference()));
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return editor && editor->isEditorDrawEnabled();
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}
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return false;
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}
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void PDFAnnotationManager::drawAnnotationDirect(const PageAnnotation& annotation,
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const QMatrix& pagePointToDevicePointMatrix,
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const PDFPage* page,
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const PDFCMS* cms,
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bool isEditorDrawEnabled,
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QPainter* painter) const
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{
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if (!m_features.testFlag(PDFRenderer::IgnoreOptionalContent) &&
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annotation.annotation->getOptionalContent().isValid())
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{
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PDFPainter pdfPainter(painter, m_features, pagePointToDevicePointMatrix, page, m_document, m_fontCache, cms, m_optionalActivity, m_meshQualitySettings);
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if (pdfPainter.isContentSuppressedByOC(annotation.annotation->getOptionalContent()))
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{
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return;
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}
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}
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QRectF annotationRectangle = annotation.annotation->getRectangle();
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{
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PDFPainterStateGuard guard(painter);
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painter->setRenderHint(QPainter::Antialiasing, true);
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painter->setWorldMatrix(pagePointToDevicePointMatrix, true);
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AnnotationDrawParameters parameters;
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parameters.painter = painter;
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parameters.annotation = annotation.annotation.data();
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parameters.formManager = m_formManager;
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parameters.key = std::make_pair(annotation.appearance, annotation.annotation->getAppearanceState());
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parameters.invertColors = m_features.testFlag(PDFRenderer::InvertColors);
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annotation.annotation->draw(parameters);
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if (parameters.boundingRectangle.isValid())
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{
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annotationRectangle = parameters.boundingRectangle;
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}
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}
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// Draw highlighting of fields, but only, if target is View,
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// we do not want to render form field highlight, when we are
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// printing to the printer.
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if (m_target == Target::View && !isEditorDrawEnabled)
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{
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PDFPainterStateGuard guard(painter);
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drawWidgetAnnotationHighlight(annotationRectangle, annotation.annotation.get(), painter, pagePointToDevicePointMatrix);
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}
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}
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void PDFAnnotationManager::drawAnnotationUsingAppearanceStream(const PageAnnotation& annotation,
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const PDFObject& appearanceStreamObject,
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const QMatrix& pagePointToDevicePointMatrix,
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const PDFPage* page,
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const PDFCMS* cms,
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QPainter* painter) const
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{
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PDFDocumentDataLoaderDecorator loader(m_document);
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const PDFStream* formStream = appearanceStreamObject.getStream();
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const PDFDictionary* formDictionary = formStream->getDictionary();
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const PDFAnnotation::Flags annotationFlags = annotation.annotation->getEffectiveFlags();
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QRectF annotationRectangle = annotation.annotation->getRectangle();
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QRectF formBoundingBox = loader.readRectangle(formDictionary->get("BBox"), QRectF());
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QMatrix formMatrix = loader.readMatrixFromDictionary(formDictionary, "Matrix", QMatrix());
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QByteArray content = m_document->getDecodedStream(formStream);
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PDFObject resources = m_document->getObject(formDictionary->get("Resources"));
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PDFObject transparencyGroup = m_document->getObject(formDictionary->get("Group"));
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if (formBoundingBox.isEmpty() || annotationRectangle.isEmpty())
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{
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// Form bounding box is empty
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return;
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}
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QMatrix userSpaceToDeviceSpace = prepareTransformations(pagePointToDevicePointMatrix, painter->device(), annotationFlags, page, annotationRectangle);
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PDFRenderer::Features features = m_features;
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if (annotationFlags.testFlag(PDFAnnotation::NoZoom))
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{
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features.setFlag(PDFRenderer::ClipToCropBox, false);
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}
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// Jakub Melka: perform algorithm 8.1, defined in PDF 1.7 reference,
|
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|
// chapter 8.4.4 Appearance streams.
|
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|
|
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|
// Step 1) - calculate transformed appearance box
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|
QRectF transformedAppearanceBox = formMatrix.mapRect(formBoundingBox);
|
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// Step 2) - calculate matrix A, which maps from form space to annotation space
|
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|
// Matrix A transforms from transformed appearance box space to the
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// annotation rectangle.
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const PDFReal scaleX = annotationRectangle.width() / transformedAppearanceBox.width();
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const PDFReal scaleY = annotationRectangle.height() / transformedAppearanceBox.height();
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const PDFReal translateX = annotationRectangle.left() - transformedAppearanceBox.left() * scaleX;
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const PDFReal translateY = annotationRectangle.bottom() - transformedAppearanceBox.bottom() * scaleY;
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QMatrix A(scaleX, 0.0, 0.0, scaleY, translateX, translateY);
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// Step 3) - compute final matrix AA
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QMatrix AA = formMatrix * A;
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bool isContentVisible = false;
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// Draw annotation
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{
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PDFPainterStateGuard guard(painter);
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PDFPainter pdfPainter(painter, features, userSpaceToDeviceSpace, page, m_document, m_fontCache, cms, m_optionalActivity, m_meshQualitySettings);
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pdfPainter.initializeProcessor();
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// Jakub Melka: we must check, that we do not display annotation disabled by optional content
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PDFObjectReference oc = annotation.annotation->getOptionalContent();
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isContentVisible = !oc.isValid() || !pdfPainter.isContentSuppressedByOC(oc);
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if (isContentVisible)
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{
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pdfPainter.processForm(AA, formBoundingBox, resources, transparencyGroup, content);
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}
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}
|
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|
|
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|
// Draw highlighting of fields, but only, if target is View,
|
||||||
|
// we do not want to render form field highlight, when we are
|
||||||
|
// printing to the printer.
|
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|
if (isContentVisible && m_target == Target::View)
|
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|
{
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PDFPainterStateGuard guard(painter);
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painter->resetMatrix();
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drawWidgetAnnotationHighlight(annotationRectangle, annotation.annotation.get(), painter, userSpaceToDeviceSpace);
|
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}
|
}
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}
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}
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|
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|||||||
@ -1400,6 +1400,59 @@ protected:
|
|||||||
QPainter* painter,
|
QPainter* painter,
|
||||||
QMatrix userSpaceToDeviceSpace) const;
|
QMatrix userSpaceToDeviceSpace) const;
|
||||||
|
|
||||||
|
/// Returns true, if given annotation should be drawn
|
||||||
|
/// \param annotation Annotation
|
||||||
|
bool isAnnotationDrawEnabled(const PageAnnotation& annotation) const;
|
||||||
|
|
||||||
|
/// Returns true, if annotation is drawn by editor (from form widget)
|
||||||
|
/// \param annotation Annotation
|
||||||
|
bool isAnnotationDrawnByEditor(const PageAnnotation& annotation) const;
|
||||||
|
|
||||||
|
/// Draws annotation
|
||||||
|
/// \param pageAnnotation Page annotation
|
||||||
|
/// \param pagePointToDevicePointMatrix Page point to device point matrix
|
||||||
|
/// \param page Page
|
||||||
|
/// \param cms Color management system
|
||||||
|
/// \param isEditorDrawEnabled Is editor draw enabled?
|
||||||
|
/// \param errors Errors list (where draw errors are stored)
|
||||||
|
/// \param painter Painter
|
||||||
|
void drawAnnotation(const PageAnnotation& annotation,
|
||||||
|
const QMatrix& pagePointToDevicePointMatrix,
|
||||||
|
const PDFPage* page,
|
||||||
|
const PDFCMS* cms,
|
||||||
|
bool isEditorDrawEnabled,
|
||||||
|
QList<PDFRenderError>& errors,
|
||||||
|
QPainter* painter) const;
|
||||||
|
|
||||||
|
/// Draws annotation by direct drawing, not using annotation's
|
||||||
|
/// appearance stream.
|
||||||
|
/// \param pageAnnotation Page annotation
|
||||||
|
/// \param pagePointToDevicePointMatrix Page point to device point matrix
|
||||||
|
/// \param page Page
|
||||||
|
/// \param cms Color management system
|
||||||
|
/// \param isEditorDrawEnabled Is annotation drawn by form widget editor?
|
||||||
|
/// \param painter Painter
|
||||||
|
void drawAnnotationDirect(const PageAnnotation& annotation,
|
||||||
|
const QMatrix& pagePointToDevicePointMatrix,
|
||||||
|
const PDFPage* page,
|
||||||
|
const PDFCMS* cms,
|
||||||
|
bool isEditorDrawEnabled,
|
||||||
|
QPainter* painter) const;
|
||||||
|
|
||||||
|
/// Draws annotation using annotation's appearance stream.
|
||||||
|
/// \param pageAnnotation Page annotation
|
||||||
|
/// \param appearanceStreamObject Object with appearance stream
|
||||||
|
/// \param pagePointToDevicePointMatrix Page point to device point matrix
|
||||||
|
/// \param page Page
|
||||||
|
/// \param cms Color management system
|
||||||
|
/// \param painter Painter
|
||||||
|
void drawAnnotationUsingAppearanceStream(const PageAnnotation& annotation,
|
||||||
|
const PDFObject& appearanceStreamObject,
|
||||||
|
const QMatrix& pagePointToDevicePointMatrix,
|
||||||
|
const PDFPage* page,
|
||||||
|
const PDFCMS* cms,
|
||||||
|
QPainter* painter) const;
|
||||||
|
|
||||||
const PDFDocument* m_document;
|
const PDFDocument* m_document;
|
||||||
|
|
||||||
PDFFontCache* m_fontCache;
|
PDFFontCache* m_fontCache;
|
||||||
|
|||||||
Reference in New Issue
Block a user