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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <fstream>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
int itkImageFileWriterUpdateLargestPossibleRegionTest(int argc, char* argv[])
{
if( argc < 3 )
{
std::cerr << "Usage: " << argv[0] << " input output" << std::endl;
return EXIT_FAILURE;
}
// We remove the output file
itksys::SystemTools::RemoveFile(argv[2]);
typedef unsigned char PixelType;
typedef itk::Image<PixelType,2> ImageType;
typedef itk::ImageFileReader<ImageType> ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
reader->Update();
typedef itk::ImageFileWriter< ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetInput(reader->GetOutput());
writer->SetFileName( argv[2] );
ImageType::RegionType region = reader->GetOutput()->GetLargestPossibleRegion();
ImageType::IndexType index = region.GetIndex();
ImageType::SizeType size = region.GetSize();
itk::ImageIORegion ioregion(2);
ioregion.SetIndex(0, index[0]);
ioregion.SetIndex(1, index[1]);
ioregion.SetSize(0, size[0]/2);
ioregion.SetSize(1, size[1]/2);
writer->SetIORegion(ioregion);
// using Update() should fail because the paste feature is not supported by the png writer
int status = 1;
try
{
writer->Update();
}
catch (itk::ExceptionObject &ex)
{
std::cout << "------------------ Caught expected exception!" << std::endl;
std::cout << ex;
status = 0;
}
if (status)
{
std::cout << "Failed to catch expected exception." << std::endl;
return EXIT_FAILURE;
}
// but it should succeed with UpdateLargestPossibleRegion() because the paste region
// is not used
try
{
writer->UpdateLargestPossibleRegion();
}
catch( itk::ExceptionObject & err )
{
std::cerr << "ExceptionObject caught !" << std::endl;
std::cerr << err << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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