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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmPGXCodec.h"
#include "gdcmTransferSyntax.h"
#include "gdcmSystem.h"
#include "gdcmDataElement.h"
#include "gdcmSequenceOfFragments.h"
#include "gdcmSwapper.h"
#include "gdcmFilenameGenerator.h"
namespace gdcm
{
PGXCodec::PGXCodec()
= default;
PGXCodec::~PGXCodec()
= default;
bool PGXCodec::CanDecode(TransferSyntax const &) const
{
return false;
}
bool PGXCodec::CanCode(TransferSyntax const &) const
{
return false;
}
bool PGXCodec::Write(const char *filename, const DataElement &out) const
{
if( !filename ) return false;
//const PhotometricInterpretation &pi = this->GetPhotometricInterpretation();
std::vector<std::string> filenames;
const PixelFormat& pf = GetPixelFormat();
unsigned short nsamples = pf.GetSamplesPerPixel();
FilenameGenerator fg;
std::string base = filename;
std::string::size_type dot_pos = base.size() - 4;
std::string prefix = base.substr(0, dot_pos );
fg.SetPrefix( prefix.c_str() );
fg.SetPattern( "_%d.pgx" );
size_t zdim = Dimensions[2];
size_t num_images = zdim * nsamples;
fg.SetNumberOfFilenames(num_images);
if( !fg.Generate() ) return false;
const ByteValue *bv = out.GetByteValue();
if(!bv)
{
gdcmErrorMacro( "PGX Codec does not handle compress syntax."
"You need to decompress first." );
return false;
}
#if 1
gdcm::PhotometricInterpretation pi = this->GetPhotometricInterpretation();
if( pi != gdcm::PhotometricInterpretation::MONOCHROME2 ) {
gdcmErrorMacro( "Bogus PI" << pi );
return false;
}
#endif
const unsigned int *dims = this->GetDimensions();
uint8_t pixelSize = pf.GetPixelSize ();
size_t image_size = dims[0] * dims[1] * pixelSize;
const char *img_buffer = bv->GetPointer();
for( unsigned int i = 0; i < num_images; ++i, img_buffer += image_size )
{
const char *targetname = fg.GetFilename( i );
std::ofstream os( targetname, std::ios::binary );
os << "PG ML ";
os << (pf.GetPixelRepresentation() ? "-" : "+");
os << " ";
os << pf.GetBitsStored();
os << " ";
os << dims[0] << " " << dims[1] << "\n";
os.write( img_buffer, image_size );
os.close();
}
return true;
}
bool PGXCodec::Read(const char *filename, DataElement &out) const
{
(void)filename;
(void)out;
gdcmErrorMacro("TODO" );
return false;
}
bool PGXCodec::GetHeaderInfo(std::istream &is0, TransferSyntax &ts)
{
std::string str;
std::getline(is0, str);
{
std::istringstream is(str);
std::string str1, str2, sign;
int depth;
is >> str1;
if( str1 != "PG" ) {
gdcmErrorMacro("PGX Wrong header: " << str1 );
return false;
}
is >> str2;
if( str2 != "ML" ) {
gdcmErrorMacro("PGX Wrong header: " << str2 );
return false;
}
is >> sign;
if( sign != "+" && sign != "-" ) {
gdcmErrorMacro("PGX Wrong header: " << sign);
return false;
}
is >> depth;
if( depth <= 0 ) {
gdcmErrorMacro("PGX Wrong header: " << depth );
return false;
}
PhotometricInterpretation pi;
pi = PhotometricInterpretation::MONOCHROME2;
unsigned int dims[3] = {};
is >> dims[0]; is >> dims[1];
PixelFormat pf = GetPixelFormat();
unsigned int numbytes = ( depth + 7 ) / 8;
pf.SetBitsAllocated( numbytes * 8);
pf.SetBitsStored( depth );
if( sign[0] == '-' ) pf.SetPixelRepresentation(1);
ts = TransferSyntax::ExplicitVRLittleEndian;
SetPhotometricInterpretation( pi );
SetPixelFormat( pf );
SetDimensions( dims );
}
return true;
}
ImageCodec * PGXCodec::Clone() const
{
return nullptr;
}
} // end namespace gdcm
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