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Tiling patterns (first part)

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Jakub Melka
2019-09-25 19:17:52 +02:00
parent d87995f8b8
commit 40f3f9f9b4
4 changed files with 195 additions and 13 deletions
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57
PdfForQtLib/sources/pdfpattern.cpp
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@ -46,11 +46,22 @@ ShadingType PDFAxialShading::getShadingType() const
PDFPatternPtr PDFPattern::createPattern(const PDFDictionary* colorSpaceDictionary, const PDFDocument* document, const PDFObject& object)
{
const PDFObject& dereferencedObject = document->getObject(object);
const PDFDictionary* patternDictionary = nullptr;
QByteArray streamData;
if (dereferencedObject.isDictionary())
{
PDFPatternPtr result;
patternDictionary = dereferencedObject.getDictionary();
}
else if (dereferencedObject.isStream())
{
const PDFStream* stream = dereferencedObject.getStream();
patternDictionary = stream->getDictionary();
streamData = document->getDecodedStream(stream);
}
const PDFDictionary* patternDictionary = dereferencedObject.getDictionary();
if (patternDictionary)
{
PDFDocumentDataLoaderDecorator loader(document);
const PatternType patternType = static_cast<PatternType>(loader.readIntegerFromDictionary(patternDictionary, "PatternType", static_cast<PDFInteger>(PatternType::Invalid)));
@ -58,9 +69,43 @@ PDFPatternPtr PDFPattern::createPattern(const PDFDictionary* colorSpaceDictionar
{
case PatternType::Tiling:
{
// TODO: Implement tiling pattern
throw PDFParserException(PDFTranslationContext::tr("Tiling pattern not implemented."));
break;
const PDFTilingPattern::PaintType paintType = static_cast<PDFTilingPattern::PaintType>(loader.readIntegerFromDictionary(patternDictionary, "PaintType", static_cast<PDFInteger>(PDFTilingPattern::PaintType::Invalid)));
const PDFTilingPattern::TilingType tilingType = static_cast<PDFTilingPattern::TilingType>(loader.readIntegerFromDictionary(patternDictionary, "TilingType", static_cast<PDFInteger>(PDFTilingPattern::TilingType::Invalid)));
const QRectF boundingBox = loader.readRectangle(patternDictionary->get("BBox"), QRectF());
const PDFReal xStep = loader.readNumberFromDictionary(patternDictionary, "XStep", 0.0);
const PDFReal yStep = loader.readNumberFromDictionary(patternDictionary, "YStep", 0.0);
PDFObject resources = document->getObject(patternDictionary->get("Resources"));
QMatrix matrix = loader.readMatrixFromDictionary(patternDictionary, "Matrix", QMatrix());
// Verify the data
if (paintType != PDFTilingPattern::PaintType::Colored && paintType != PDFTilingPattern::PaintType::Uncolored)
{
throw PDFParserException(PDFTranslationContext::tr("Invalid tiling pattern - wrong paint type %1.").arg(static_cast<PDFInteger>(paintType)));
}
if (tilingType != PDFTilingPattern::TilingType::ConstantSpacing && tilingType != PDFTilingPattern::TilingType::NoDistortion && tilingType != PDFTilingPattern::TilingType::ConstantSpacingAndFasterTiling)
{
throw PDFParserException(PDFTranslationContext::tr("Invalid tiling pattern - wrong tiling type %1.").arg(static_cast<PDFInteger>(tilingType)));
}
if (!boundingBox.isValid())
{
throw PDFParserException(PDFTranslationContext::tr("Invalid tiling pattern - bounding box is invalid.").arg(static_cast<PDFInteger>(paintType)));
}
if (isZero(xStep) || isZero(yStep))
{
throw PDFParserException(PDFTranslationContext::tr("Invalid tiling pattern - steps are invalid.").arg(static_cast<PDFInteger>(paintType)));
}
PDFTilingPattern* pattern = new PDFTilingPattern();
pattern->m_boundingBox = boundingBox;
pattern->m_matrix = matrix;
pattern->m_paintType = paintType;
pattern->m_tilingType = tilingType;
pattern->m_xStep = xStep;
pattern->m_yStep = yStep;
pattern->m_resources = resources;
pattern->m_content = qMove(streamData);
return PDFPatternPtr(pattern);
}
case PatternType::Shading:
@ -74,7 +119,7 @@ PDFPatternPtr PDFPattern::createPattern(const PDFDictionary* colorSpaceDictionar
throw PDFParserException(PDFTranslationContext::tr("Invalid pattern."));
}
return result;
return PDFPatternPtr();
}
throw PDFParserException(PDFTranslationContext::tr("Invalid pattern."));