During the extraction of images from a PDF file I have a problem extracting
FlateDecoded images. The following piece of code fails on the GetFilteredCopy
method.
PdfObject * imagePtr = m_pdfPagePtr->GetFromResources( PdfName(
"XObject" ), imageRef.GetName() );
PdfObject * imageFilterPtr = imagePtr->GetDictionary().GetKey(
PdfName::KeyFilter );
if ( imageFilterPtr && imageFilterPtr->IsName() &&
imageFilterPtr->GetName().GetName() == "FlateDecode" )
{
PdfMemStream *streamPtr = dynamic_cast<PdfMemStream *>(
(*imagePtr).GetStream() );
char fileName[ 30];
char filePath[256];
snprintf( fileName, 30, "image%04i_%04i",
m_pdfPagePtr->GetPageNumber(), ++m_imageCount );
snprintf( filePath, 256, "%s%s", outputDir.c_str(), fileName );
FILE * fileHandle = fopen( filePath, "wb" );
char * filePtr;
pdf_long bufferSize;
streamPtr->GetFilteredCopy( &filePtr, &bufferSize );
fwrite( filePtr, bufferSize, sizeof(char), fileHandle );
fclose( fileHandle );
}
The actual error is:
PoDoFo encounter an error. Error: 22 ePdfError_InvalidPredictor
Callstack:
#0 Error Source:
/home/jo/dvlp/dev/podofo-trunc/podofo/src/PdfFiltersPrivate.cpp:538
#1 Error Source:
/home/jo/dvlp/dev/podofo-trunc/podofo/src/PdfFiltersPrivate.cpp:145
The image is correctly displaying in a PDF reader.
Any idea what might be the cause?
- Jo
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