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Editor plugin: Content stream builder

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Jakub Melka
2024-05-19 20:13:57 +02:00
parent 21ff8d45fc
commit 17b275c8b1
5 changed files with 80 additions and 25 deletions
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53
Pdf4QtLibCore/sources/pdfpagecontenteditorprocessor.cpp
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@ -17,6 +17,8 @@
#include "pdfpagecontenteditorprocessor.h"
#include "pdfdocumentbuilder.h"
#include "pdfobject.h"
#include "pdfstreamfilters.h"
#include <QStringBuilder>
#include <QXmlStreamReader>
@ -968,7 +970,7 @@ void PDFPageContentEditorContentStreamBuilder::writeStateDifference(QTextStream&
QString blendModeName = PDFBlendModeInfo::getBlendModeName(m_currentState.getBlendMode());
stateDictionary.beginDictionaryItem("BM");
stateDictionary << WrapName(blendModeName);
stateDictionary << WrapName(blendModeName.toLatin1());
stateDictionary.endDictionaryItem();
}
@ -1016,7 +1018,7 @@ void PDFPageContentEditorContentStreamBuilder::writeStateDifference(QTextStream&
QByteArray currentKey = QString("s%1").arg(++i).toLatin1();
if (!m_graphicStateDictionary.hasKey(currentKey))
{
m_graphicStateDictionary.addEntry(currentKey, std::move(stateObject));
m_graphicStateDictionary.addEntry(PDFInplaceOrMemoryString(currentKey), std::move(stateObject));
key = currentKey;
break;
}
@ -1038,9 +1040,8 @@ void PDFPageContentEditorContentStreamBuilder::writeElement(const PDFEditedPageC
if (const PDFEditedPageContentElementImage* imageElement = element->asImage())
{
QImage image = imageElement->getImage();
PDFObject imageObject = imageElement->getImageObject();
writeImage(image);
writeImage(stream, image);
}
if (const PDFEditedPageContentElementPath* pathElement = element->asPath())
@ -1361,6 +1362,45 @@ void PDFPageContentEditorContentStreamBuilder::writeText(QTextStream& stream, co
stream << "ET Q" << Qt::endl;
}
void PDFPageContentEditorContentStreamBuilder::writeImage(QTextStream& stream, const QImage& image)
{
QByteArray key;
int i = 0;
while (true)
{
QByteArray currentKey = QString("Im%1").arg(++i).toLatin1();
if (!m_xobjectDictionary.hasKey(currentKey))
{
PDFArray array;
array.appendItem(PDFObject::createName("FlateDecode"));
QImage codedImage = image;
codedImage = codedImage.convertToFormat(QImage::Format_ARGB32);
QByteArray decodedStream(reinterpret_cast<const char*>(image.constBits()), image.sizeInBytes());
// Compress the content stream
QByteArray compressedData = PDFFlateDecodeFilter::compress(decodedStream);
PDFDictionary imageDictionary;
imageDictionary.setEntry(PDFInplaceOrMemoryString("Subtitle"), PDFObject::createName("Image"));
imageDictionary.setEntry(PDFInplaceOrMemoryString("Width"), PDFObject::createInteger(image.width()));
imageDictionary.setEntry(PDFInplaceOrMemoryString("Height"), PDFObject::createInteger(image.height()));
imageDictionary.setEntry(PDFInplaceOrMemoryString("ColorSpace"), PDFObject::createName("DeviceRGB"));
imageDictionary.setEntry(PDFInplaceOrMemoryString("BitsPerComponent"), PDFObject::createInteger(8));
imageDictionary.setEntry(PDFInplaceOrMemoryString("Length"), PDFObject::createInteger(compressedData.size()));
imageDictionary.setEntry(PDFInplaceOrMemoryString("Filter"), PDFObject::createArray(std::make_shared<PDFArray>(qMove(array))));
PDFObject imageObject = PDFObject::createStream(std::make_shared<PDFStream>(qMove(imageDictionary), qMove(compressedData)));
m_xobjectDictionary.addEntry(PDFInplaceOrMemoryString(currentKey), std::move(imageObject));
key = currentKey;
break;
}
}
stream << "/" << key << " Do" << Qt::endl;
}
QByteArray PDFPageContentEditorContentStreamBuilder::selectFont(const QByteArray& font)
{
m_textFont = nullptr;
@ -1404,12 +1444,15 @@ QByteArray PDFPageContentEditorContentStreamBuilder::selectFont(const QByteArray
}
m_textFont = PDFFont::createFont(fontObject, font, m_document);
return defaultFontKey;
}
return font;
}
void PDFPageContentEditorContentStreamBuilder::addError(const QString& error)
{
m_errors << error;
}
} // namespace pdf