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/************************************************************************
*
* Copyright (C) 2017-2024 IRCAD France
* Copyright (C) 2017-2020 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "io/vtk/bitmap_image_reader.hpp"
#include "io/vtk/helper/vtk_lambda_command.hpp"
#include "io/vtk/vtk.hpp"
#include <core/jobs/base.hpp>
#include <core/jobs/observer.hpp>
#include <boost/tokenizer.hpp>
#include <vtkGenericDataObjectReader.h>
#include <vtkImageData.h>
#include <vtkImageReader2.h>
#include <vtkImageReader2Collection.h>
#include <vtkImageReader2Factory.h>
#include <vtkSmartPointer.h>
namespace sight::io::vtk
{
//------------------------------------------------------------------------------
bitmap_image_reader::bitmap_image_reader() :
m_job(std::make_shared<core::jobs::observer>("Bitmap image reader"))
{
/* Initialize the available extensions */
std::vector<std::string> ext;
bitmap_image_reader::get_available_extensions(ext);
if(!ext.empty())
{
m_available_extensions = ext.at(0);
for(std::vector<std::string>::size_type i = 1 ; i < ext.size() ; i++)
{
m_available_extensions = m_available_extensions + " " + ext.at(i);
}
}
}
//------------------------------------------------------------------------------
bitmap_image_reader::~bitmap_image_reader()
= default;
//------------------------------------------------------------------------------
void bitmap_image_reader::read()
{
SIGHT_ASSERT("The current object has expired.", !m_object.expired());
SIGHT_ASSERT("Unable to lock object", m_object.lock());
data::image::sptr p_image = get_concrete_object();
// Use a vtkImageReader2Factory to automatically detect the type of the input file
// And select the right reader for the file
vtkSmartPointer<vtkImageReader2Factory> factory = vtkSmartPointer<vtkImageReader2Factory>::New();
vtkImageReader2* reader = factory->CreateImageReader2(this->get_file().string().c_str());
SIGHT_THROW_IF("BitmapImageReader cannot read Bitmap image file :" << this->get_file().string(), !reader);
reader->SetFileName(this->get_file().string().c_str());
using helper::vtk_lambda_command;
vtkSmartPointer<vtk_lambda_command> progress_callback;
progress_callback = vtkSmartPointer<vtk_lambda_command>::New();
progress_callback->set_callback(
[&](vtkObject* _caller, std::uint64_t, void*)
{
auto* filter = static_cast<vtkGenericDataObjectReader*>(_caller);
m_job->done_work(static_cast<uint64_t>(filter->GetProgress() * 100.0));
});
reader->AddObserver(vtkCommand::ProgressEvent, progress_callback);
m_job->add_simple_cancel_hook([&]{reader->AbortExecuteOn();});
reader->Update();
vtkSmartPointer<vtkImageData> img = reader->GetOutput();
reader->Delete();
m_job->finish();
SIGHT_THROW_IF("BitmapImageReader cannot read Bitmap image file :" << this->get_file().string(), !img);
try
{
io::vtk::from_vtk_image(img, p_image);
}
catch(std::exception& e)
{
SIGHT_THROW("BitmapImage to data::image failed " << e.what());
}
}
//------------------------------------------------------------------------------
std::string bitmap_image_reader::extension() const
{
return m_available_extensions;
}
//------------------------------------------------------------------------------
core::jobs::base::sptr bitmap_image_reader::get_job() const
{
return m_job;
}
//------------------------------------------------------------------------------
void bitmap_image_reader::get_available_extensions(std::vector<std::string>& _ext)
{
/* Get the collection of available bitmap image readers */
vtkSmartPointer<vtkImageReader2Collection> ir2c = vtkSmartPointer<vtkImageReader2Collection>::New();
vtkImageReader2Factory::GetRegisteredReaders(ir2c);
const boost::char_separator<char> sep(" ");
/* Iterate over the elements of the collection */
ir2c->InitTraversal();
for(int i = 0 ; i < ir2c->GetNumberOfItems() ; i++)
{
vtkImageReader2* ir2 = ir2c->GetNextItem();
/* Split the string returned by GetFileExtensions() (several extensions can be available for the same type) */
const std::string s = ir2->GetFileExtensions();
const boost::tokenizer<boost::char_separator<char> > tokens {s, sep};
for(const auto& token : tokens)
{
_ext.push_back(token);
}
}
}
//------------------------------------------------------------------------------
} // namespace sight::io::vtk
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