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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 "gdcmImageReader.h"
#include "gdcmImageWriter.h"
#include "gdcmFilename.h"
#include "gdcmSystem.h"
#include "gdcmFileMetaInformation.h"
#include "gdcmTesting.h"
#include "gdcmByteSwap.h"
namespace gdcm
{
int TestImageWrite(const char *subdir, const char* filename)
{
ImageReader reader;
reader.SetFileName( filename );
if ( !reader.Read() )
{
const FileMetaInformation &header = reader.GetFile().GetHeader();
MediaStorage ms = header.GetMediaStorage();
bool isImage = MediaStorage::IsImage( ms );
bool pixeldata = reader.GetFile().GetDataSet().FindDataElement( Tag(0x7fe0,0x0010) );
if( isImage && pixeldata )
{
std::cerr << "Failed to read: " << filename << std::endl;
return 1;
}
else
{
// not an image give up...
std::cerr << "Problem with: " << filename << " but that's ok" << std::endl;
return 0;
}
}
// Create directory first:
std::string tmpdir = Testing::GetTempDirectory( subdir );
if( !System::FileIsDirectory( tmpdir.c_str() ) )
{
System::MakeDirectory( tmpdir.c_str() );
//return 1;
}
std::string outfilename = Testing::GetTempFilename( filename, subdir );
ImageWriter writer;
writer.SetFileName( outfilename.c_str() );
writer.SetFile( reader.GetFile() ); // important
writer.SetImage( reader.GetImage() );
if( !writer.Write() )
{
std::cerr << "Failed to write: " << outfilename << std::endl;
return 1;
}
std::cout << "success: " << outfilename << std::endl;
// Let's read that file back in !
ImageReader reader2;
reader2.SetFileName( outfilename.c_str() );
if ( reader2.Read() )
{
int res = 0;
const Image &img = reader2.GetImage();
//std::cerr << "Success to read image from file: " << filename << std::endl;
unsigned long len = img.GetBufferLength();
char* buffer = new char[len];
img.GetBuffer(buffer);
// On big Endian system we have byteswapped the buffer (duh!)
// Since the md5sum is byte based there is now way it would detect
// that the file is written in big endian word, so comparing against
// a md5sum computed on LittleEndian would fail. Thus we need to
// byteswap (again!) here:
#ifdef GDCM_WORDS_BIGENDIAN
if( img.GetPixelFormat().GetBitsAllocated() == 16 )
{
assert( !(len % 2) );
assert( img.GetPhotometricInterpretation() == PhotometricInterpretation::MONOCHROME1
|| img.GetPhotometricInterpretation() == PhotometricInterpretation::MONOCHROME2 );
ByteSwap<unsigned short>::SwapRangeFromSwapCodeIntoSystem(
(unsigned short*)buffer, SwapCode::LittleEndian, len/2);
}
#endif
// reuse the filename, since outfilename is simply the new representation of the old filename
const char *ref = Testing::GetMD5FromFile(filename);
char digest[33] = {};
Testing::ComputeMD5(buffer, len, digest);
if( !ref )
{
// new regression image needs a md5 sum
std::cout << "Missing md5 " << digest << " for: " << outfilename << std::endl;
//assert(0);
res = 1;
}
else if( strcmp(digest, ref) != 0 )
{
std::cerr << "Problem reading image from: " << outfilename << std::endl;
std::cerr << "Found " << digest << " instead of " << ref << std::endl;
res = 1;
#if 0
std::ofstream debug("/tmp/dump.gray", std::ios::binary);
debug.write(buffer, len);
debug.close();
//assert(0);
#endif
}
delete[] buffer;
return res;
}
#if 0
// Ok we have now two files let's compare their md5 sum:
char digest[33], outdigest[33];
System::ComputeFileMD5(filename, digest);
System::ComputeFileMD5(outfilename.c_str(), outdigest);
if( strcmp(digest, outdigest) )
{
// too bad the file is not identical, so let's be paranoid and
// try to reread-rewrite this just-writen file:
// TODO: Copy file System::CopyFile( );
if( TestImageWrite( outfilename.c_str() ) )
{
std::cerr << filename << " and "
<< outfilename << " are different\n";
return 1;
}
// In theory I need to compare the two documents to check they
// are identical... TODO
std::cerr << filename << " and "
<< outfilename << " should be compatible\n";
return 0;
}
else
{
std::cerr << filename << " and "
<< outfilename << " are identical\n";
return 0;
}
#endif
return 0;
}
}
int TestImageWriter(int argc, char *argv[])
{
if( argc == 2 )
{
const char *filename = argv[1];
return gdcm::TestImageWrite(argv[0],filename);
}
// else
gdcm::Trace::DebugOff();
gdcm::Trace::WarningOff();
int r = 0, i = 0;
const char *filename;
const char * const *filenames = gdcm::Testing::GetFileNames();
while( (filename = filenames[i]) )
{
r += gdcm::TestImageWrite(argv[0], filename );
++i;
}
return r;
}
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