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/************************************************************************
*
* Copyright (C) 2023 IRCAD France
*
* 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 "reader.hpp"
#include "detail/reader_impl.hxx"
#include <algorithm>
#include <fstream>
// cspell:ignore nvjpeg nvjpeg2k nppi bitstream LRCP BGRI RGBI NOLINTNEXTLINE LIBJPEG OPENJPEG
namespace sight::io::bitmap
{
reader::reader() :
m_pimpl(std::make_unique<detail::reader_impl>(this))
{
}
// Defining the destructor here, allows us to use PImpl with a unique_ptr
reader::~reader() = default;
//------------------------------------------------------------------------------
std::string reader::extension() const
{
try
{
const auto& [backend, extensions] = detail::guess_backend_or_extension(
backend::any,
get_file().extension().string()
);
return extensions.front();
}
catch(...)
{
return extensions(backend::libtiff).front();
}
}
//------------------------------------------------------------------------------
void reader::read()
{
read(backend::any);
}
//------------------------------------------------------------------------------
void reader::read(backend _backend)
{
auto file = get_file();
if(file.has_parent_path() && !std::filesystem::exists(file.parent_path()))
{
std::filesystem::create_directories(file.parent_path());
}
// Compute the right backend to use
const auto& [backend_to_use, extensions_to_use] = detail::guess_backend_or_extension(_backend, extension());
// If there is an extension
if(file.has_extension())
{
// Check that the extension is valid
const auto& current_extension = file.extension().string();
SIGHT_THROW_IF(
"Unsupported image extension: '" << file.extension().string() << "'",
std::none_of(
extensions_to_use.cbegin(),
extensions_to_use.cend(),
[&](const auto& extension)
{
return current_extension.ends_with(extension);
})
);
}
// Open the input file
std::ifstream input;
input.open(file.string(), std::ios::in | std::ios::binary);
read(input, backend_to_use);
}
//------------------------------------------------------------------------------
void reader::read(std::istream& _istream, backend _backend)
{
m_pimpl->read(_istream, _backend);
}
} // namespace sight::io::bitmap
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