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Color spaces, beginning of painting

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Jakub Melka
2019-02-09 18:40:56 +01:00
parent 0a28869c94
commit 9264ea70c1
13 changed files with 703 additions and 2 deletions
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92
PdfForQtLib/sources/pdfdocument.cpp
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@ -19,6 +19,8 @@
#include "pdfdocument.h"
#include "pdfparser.h"
#include "pdfencoding.h"
#include "pdfstreamfilters.h"
#include "pdfconstants.h"
namespace pdf
{
@ -38,6 +40,96 @@ static constexpr const char* PDF_DOCUMENT_INFO_ENTRY_TRAPPED_TRUE = "True";
static constexpr const char* PDF_DOCUMENT_INFO_ENTRY_TRAPPED_FALSE = "False";
static constexpr const char* PDF_DOCUMENT_INFO_ENTRY_TRAPPED_UNKNOWN = "Unknown";
QByteArray PDFDocument::getDecodedStream(const PDFStream* stream) const
{
const PDFDictionary* dictionary = stream->getDictionary();
// Retrieve filters
PDFObject filters;
if (dictionary->hasKey(PDF_STREAM_DICT_FILTER))
{
filters = getObject(dictionary->get(PDF_STREAM_DICT_FILTER));
}
else if (dictionary->hasKey(PDF_STREAM_DICT_FILE_FILTER))
{
filters = getObject(dictionary->get(PDF_STREAM_DICT_FILE_FILTER));
}
// Retrieve filter parameters
PDFObject filterParameters;
if (dictionary->hasKey(PDF_STREAM_DICT_DECODE_PARMS))
{
filterParameters = getObject(dictionary->get(PDF_STREAM_DICT_DECODE_PARMS));
}
else if (dictionary->hasKey(PDF_STREAM_DICT_FDECODE_PARMS))
{
filterParameters = getObject(dictionary->get(PDF_STREAM_DICT_FDECODE_PARMS));
}
std::vector<const PDFStreamFilter*> filterObjects;
std::vector<PDFObject> filterParameterObjects;
if (filters.isName())
{
filterObjects.push_back(PDFStreamFilterStorage::getFilter(filters.getString()));
}
else if (filters.isArray())
{
const PDFArray* filterArray = filters.getArray();
const size_t filterCount = filterArray->getCount();
for (size_t i = 0; i < filterCount; ++i)
{
const PDFObject& object = getObject(filterArray->getItem(i));
if (object.isName())
{
filterObjects.push_back(PDFStreamFilterStorage::getFilter(object.getString()));
}
else
{
return QByteArray();
}
}
}
else if (!filters.isNull())
{
return QByteArray();
}
if (filterParameters.isArray())
{
const PDFArray* filterParameterArray = filterParameters.getArray();
const size_t filterParameterCount = filterParameterArray->getCount();
for (size_t i = 0; i < filterParameterCount; ++i)
{
const PDFObject& object = getObject(filterParameterArray->getItem(i));
filterParameterObjects.push_back(object);
}
}
else
{
filterParameterObjects.push_back(filterParameters);
}
filterParameterObjects.resize(filterObjects.size());
std::reverse(filterObjects.begin(), filterObjects.end());
std::reverse(filterParameterObjects.begin(), filterParameterObjects.end());
QByteArray result = *stream->getContent();
for (size_t i = 0, count = filterObjects.size(); i < count; ++i)
{
const PDFStreamFilter* streamFilter = filterObjects[i];
const PDFObject& streamFilterParameters = filterParameterObjects[i];
if (streamFilter)
{
result = streamFilter->apply(result, this, streamFilterParameters);
}
}
return result;
}
void PDFDocument::init()
{
initInfo();