fenix
/
PDF4QT
mirror of https://github.com/JakubMelka/PDF4QT.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

JBIG2 - bugfixing

This commit is contained in:
Jakub Melka 2019-11-03 12:23:05 +01:00
parent b66ecd3b45
commit ab10a6923e
1 changed files with 20 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
PdfForQtLib/sources/pdfjbig2decoder.cpp
View File

@ -208,7 +208,7 @@ struct PDFJBIG2TextRegionDecodingParameters : public PDFJBIG2ArithmeticDecoderSt
PDFJBIG2BitOperation SBCOMBOP = PDFJBIG2BitOperation::Invalid;
bool TRANSPOSED = false;
uint8_t REFCORNER = 0;
uint8_t SBDSOFFSET = 0;
int32_t SBDSOFFSET = 0;
uint32_t SBW = 0;
uint32_t SBH = 0;
uint32_t SBNUMINSTANCES = 0;
@ -1344,22 +1344,22 @@ void PDFJBIG2Decoder::processSymbolDictionary(const PDFJBIG2SegmentHeader& heade
{
arithmeticDecoderStates.resetArithmeticStatesGeneric(parameters.SDTEMPLATE, nullptr);
}
}
if (parameters.SDREFAGG)
if (parameters.SDREFAGG)
{
if (parameters.isArithmeticCodingStateUsed)
{
if (parameters.isArithmeticCodingStateUsed)
if (references.symbolDictionaries.empty())
{
if (references.symbolDictionaries.empty())
{
throw PDFException(PDFTranslationContext::tr("JBIG2 trying to use aritmetic decoder context from previous symbol dictionary, but it doesn't exist."));
}
throw PDFException(PDFTranslationContext::tr("JBIG2 trying to use aritmetic decoder context from previous symbol dictionary, but it doesn't exist."));
}
arithmeticDecoderStates.resetArithmeticStatesGenericRefinement(parameters.SDRTEMPLATE, &references.symbolDictionaries.back()->getGenericRefinementState());
}
else
{
arithmeticDecoderStates.resetArithmeticStatesGenericRefinement(parameters.SDRTEMPLATE, nullptr);
}
arithmeticDecoderStates.resetArithmeticStatesGenericRefinement(parameters.SDRTEMPLATE, &references.symbolDictionaries.back()->getGenericRefinementState());
}
else
{
arithmeticDecoderStates.resetArithmeticStatesGenericRefinement(parameters.SDRTEMPLATE, nullptr);
}
}
@ -1487,10 +1487,13 @@ void PDFJBIG2Decoder::processSymbolDictionary(const PDFJBIG2SegmentHeader& heade
refinementParameters.GRREFERENCEY = RDYI;
refinementParameters.TPGRON = false;
refinementParameters.GRAT = parameters.SDRAT;
refinementParameters.decoder = &arithmeticDecoder;
refinementParameters.arithmeticDecoderState = &arithmeticDecoderStates.states[PDFJBIG2ArithmeticDecoderStates::Refinement];
parameters.SDNEWSYMS[NSYMSDECODED] = readRefinementBitmap(refinementParameters);
if (parameters.SDHUFF)
{
arithmeticDecoder.finalize();
m_reader.alignToBytes();
m_reader.seek(oldPosition + BMSIZE);
}
@ -1693,8 +1696,9 @@ void PDFJBIG2Decoder::processTextRegion(const PDFJBIG2SegmentHeader& header)
const uint8_t SBCOMBOOP_value = (flags >> 7) & 0x03;
const PDFJBIG2BitOperation SBCOMBOOP = getSBCOMBOOP(SBCOMBOOP_value);
const uint8_t SBDEFPIXEL = ((flags >> 9) & 0x01) ? 0xFF : 0x00;
const uint8_t SBDSOFFSET = (flags >> 10) & 0x1F;
const int32_t SBDSOFFSET = (flags >> 10) & 0x1F;
const uint8_t SBRTEMPLATE = (flags >> 15) & 0x01;
const int32_t SBDSOFFSET_SIGNED = (SBDSOFFSET & 0b10000) ? (SBDSOFFSET - 0b100000) : SBDSOFFSET;
// Decoding parameters
PDFJBIG2TextRegionDecodingParameters parameters;
@ -1704,7 +1708,7 @@ void PDFJBIG2Decoder::processTextRegion(const PDFJBIG2SegmentHeader& header)
parameters.SBCOMBOP = SBCOMBOOP;
parameters.TRANSPOSED = TRANSPOSED;
parameters.REFCORNER = REFCORNER;
parameters.SBDSOFFSET = SBDSOFFSET;
parameters.SBDSOFFSET = SBDSOFFSET_SIGNED;
parameters.SBW = regionSegmentInfo.width;
parameters.SBH = regionSegmentInfo.height;
parameters.SBRTEMPLATE = SBRTEMPLATE;
@ -2431,7 +2435,7 @@ PDFJBIG2Bitmap PDFJBIG2Decoder::readBitmap(PDFJBIG2BitmapDecodingParameters& par
{
for (unsigned int column = 0; column < data.getWidth(); ++column)
{
bitmap.setPixel(column, row, (reader.read()) ? 0xFF : 0x00);
bitmap.setPixel(column, row, (reader.read()) ? 0x00 : 0xFF);
}
reader.alignToBytes();
@ -2694,10 +2698,6 @@ PDFJBIG2Bitmap PDFJBIG2Decoder::readRefinementBitmap(PDFJBIG2BitmapRefinementDec
if (parameters.TPGRON)
{
LTP = LTP ^ decoder.readBit(LTPContext, parameters.arithmeticDecoderState);
if (LTP)
{
}
}
if (!LTP)