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Operator list

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This commit is contained in:
Jakub Melka
2019-02-10 18:32:15 +01:00
parent 9264ea70c1
commit b01a135dfd
4 changed files with 191 additions and 3 deletions
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61
PdfForQtLib/sources/pdfrenderer.cpp
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@ -21,6 +21,27 @@
namespace pdf
{
// Graphic state operators - mapping from PDF name to the enum, splitted into groups.
// Please see Table 4.1 in PDF Reference 1.7, chapter 4.1 - Graphic Objects.
//
// General graphic state: w, J, j, M, d, ri, i, gs
// Special graphic state: q, Q, cm
// Path construction: m, l, c, v, y, h, re
// Path painting: S, s, F, f, f*, B, B*, b, b*, n
// Clipping paths: W, W*
// Text object: BT, ET
// Text state: Tc, Tw, Tz, TL, Tf, Tr, Ts
// Text positioning: Td, TD, Tm, T*
// Text showing: Tj, TJ, ', "
// Type 3 font: d0, d1
// Color: CS, cs, SC, SCN, sc, scn, G, g, RG, rg, K, k
// Shading pattern: sh
// Inline images: BI, ID, EI
// XObject: Do
// Marked content: MP, DP, BMC, BDC, EMC
// Compatibility: BX, EX
PDFRenderer::PDFRenderer(const PDFDocument* document) :
m_document(document),
m_features(Antialasing | TextAntialiasing)
@ -94,7 +115,45 @@ QList<PDFRenderError> PDFPageContentProcessor::processContentStream(const PDFStr
{
QByteArray content = m_document->getDecodedStream(stream);
return QList<PDFRenderError>();
PDFLexicalAnalyzer parser(content.constBegin(), content.constEnd());
QList<PDFRenderError> errors;
while (!parser.isAtEnd())
{
try
{
PDFLexicalAnalyzer::Token token = parser.fetch();
switch (token.type)
{
case PDFLexicalAnalyzer::TokenType::Command:
{
// Process the command, then clear the operand stack
processCommand(token.data.toByteArray(), errors);
m_operands.clear();
break;
}
case PDFLexicalAnalyzer::TokenType::EndOfFile:
{
// Do nothing, just break, we are at the end
break;
}
default:
{
// Push the operand onto the operand stack
m_operands.push_back(std::move(token));
break;
}
}
}
catch (PDFParserException exception)
{
errors.append(PDFRenderError(RenderErrorType::Error, exception.getMessage()));
}
}
return errors;
}
PDFPageContentProcessor::PDFPageContentProcessorState::PDFPageContentProcessorState() :