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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 <iostream>
#include <algorithm>
#include "itkPNGImageIO.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTestingMacros.h"
#define SPECIFIC_IMAGEIO_MODULE_TEST
namespace
{
int CompareExtensions(itk::ImageIOBase::ArrayOfExtensionsType& a1, itk::ImageIOBase::ArrayOfExtensionsType& a2)
{
std::sort( a1.begin(), a1.end() );
std::sort( a2.begin(), a2.end() );
if( a1 == a2 )
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
} // end anonymous namespace
int itkPNGImageIOTest2( int argc, char * argv[] )
{
// Test the reading of an image as grayscale image and writing of grayscale image
if( argc < 5 )
{
std::cerr << "Usage: " << argv[0]
<< " input"
<< " output"
<< " useCompression"
<< " compressionLevel"
<< " expandRGBPalette" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef unsigned char PixelType;
// We are converting read data into grayscale pixel image
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
// Read the input image
itk::PNGImageIO::Pointer io = itk::PNGImageIO::New();
EXERCISE_BASIC_OBJECT_METHODS( io, PNGImageIO, ImageIOBase );
// Exercise exception cases
size_t sizeOfActualIORegion = io->GetIORegion().GetNumberOfPixels() *
( io->GetComponentSize() * io->GetNumberOfComponents() );
char *loadBuffer = new char[sizeOfActualIORegion];
TRY_EXPECT_EXCEPTION( io->Read( loadBuffer ) );
bool useCompression = static_cast< bool >( argv[3] );
TEST_SET_GET_BOOLEAN( io, UseCompression, useCompression );
int compressionLevel = atoi( argv[4] );
io->SetCompressionLevel( compressionLevel );
TEST_SET_GET_VALUE( compressionLevel, io->GetCompressionLevel() );
bool expandRGBPalette = static_cast< bool >( atoi( argv[5] ) );
TEST_SET_GET_BOOLEAN( io, ExpandRGBPalette, expandRGBPalette );
if( io->CanReadFile( "" ) )
{
std::cerr << "Test failed!" << std::endl;
std::cout << "No filename specified." << std::endl;
std::cout << "CanReadFile: "
<< "Expected false but got true" << std::endl;
}
if( io->CanStreamRead() )
{
std::cout << "itk::PNGImageIO can stream read" << std::endl;
}
else
{
std::cout << "itk::PNGImageIO cannot stream read" << std::endl;
}
// Check supported file extensions
// Expecting ".png" and ".PNG"
itk::ImageIOBase::ArrayOfExtensionsType expectedExtensions;
expectedExtensions.push_back( ".png" );
expectedExtensions.push_back( ".PNG" );
// Read extensions
itk::ImageIOBase::ArrayOfExtensionsType readExtensions = io->GetSupportedReadExtensions();
if( CompareExtensions( readExtensions, expectedExtensions ) )
{
std::cout << "Test failed!" << std::endl;
std::cerr << "Unexpected list of supported read extension." << std::endl;
return EXIT_FAILURE;
}
// Write extensions
itk::ImageIOBase::ArrayOfExtensionsType writeExtensions = io->GetSupportedWriteExtensions();
if( CompareExtensions( writeExtensions, expectedExtensions) )
{
std::cout << "Test failed!" << std::endl;
std::cerr << "Unexpected list of supported write extension." << std::endl;
return EXIT_FAILURE;
}
if( !io->SupportsDimension( Dimension ) )
{
std::cerr << "Test failed!" << std::endl;
std::cerr << "itk::PNGImageIO does not support dimension: " << Dimension << std::endl;
return EXIT_FAILURE;
}
if( !io->CanReadFile( argv[1] ) )
{
std::cerr << "Test failed!" << std::endl;
std::cout << "itk::PNGImageIO cannot read file "
<< io->GetFileName() << std::endl;
return EXIT_FAILURE;
}
// Actually reading an RGBA image
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
reader->SetImageIO( io );
TRY_EXPECT_NO_EXCEPTION( reader->Update() );
if( io->GetExpandRGBPalette() )
{
std::cout << "If palette image, expanding to RGB. " << std::endl;
}
else
{
std::cout << "If palette image, trying to read as scalar. " << std::endl;
}
if( !io->GetExpandRGBPalette() && io->GetIsReadAsScalarPlusPalette() )
{
std::cout << "Image read as Scalar." << std::endl;
itk::PNGImageIO::PaletteType palette = io->GetColorPalette();
std::cout << "PaletteType: " << std::endl;
for( unsigned int i = 0; i < palette.size(); ++i )
{
std::cout << "[" << i << "]:" << palette[i] << std::endl;
}
}
else
{
std::cout << "Image read as grayscale." << std::endl;
}
// Exercise other methods
itk::ImageIOBase::SizeType pixelStride = io->GetPixelStride();
std::cout << "PixelStride: "
<< itk::NumericTraits< itk::ImageIOBase::SizeType >::PrintType( pixelStride )
<< std::endl;
ImageType::Pointer inputImage = reader->GetOutput();
// Write the grayscale output image
WriterType::Pointer writer = WriterType::New();
writer->SetInput( inputImage );
writer->SetImageIO( io );
writer->SetFileName( argv[2] );
TRY_EXPECT_NO_EXCEPTION( writer->Update() );
// Release memory
delete[] loadBuffer;
std::cout << "Test finished" << std::endl;
return EXIT_SUCCESS;
}
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