LutReader.hpp

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#ifndef _LUTENGINE_LUTREADER_HPP_
#define _LUTENGINE_LUTREADER_HPP_

#include <tuttle/plugin/memory/OfxAllocator.hpp>

#include <boost/filesystem/path.hpp>
#include <boost/spirit/include/classic.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/spirit/include/classic.hpp>
#include <boost/spirit/include/classic_assign_actor.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/function.hpp>

#include <vector>

namespace tuttle {

using namespace boost;
namespace fs = boost::filesystem;

class LutReader
{
public:
        typedef std::vector<double, tuttle::plugin::OfxAllocator<double> > VectorDouble;
protected:
        VectorDouble _data;
        VectorDouble _steps;
        bool _bReadOk;

public:
        LutReader() : _bReadOk( false ) {}
        virtual ~LutReader() {}

        /// Set 3DL filename
        bool read( const fs::path& filename );
        /// Is a file read success
        const bool           readOk() const { return _bReadOk; }
        VectorDouble& data()         { return _data; }
        VectorDouble& steps()        { return _steps; }
};

// 3DL File parser
struct gram_3dl : public boost::spirit::classic::grammar<gram_3dl>
{
        gram_3dl( LutReader& lutReader )
                : _lutReader( lutReader )
        {}

        template <typename ScannerT>
        struct definition
        {
                definition( const gram_3dl& self )
                {
                        using namespace boost::spirit::classic;
                        gram_3dl_spec     = *gram_comment >> gram_line_quantiz >> +( gram_comment | gram_rgb | space_p );
                        gram_rgb          = *blank_p >> *( uint_p[ push_back_a( self._lutReader.data() ) ] % *blank_p ) >> +space_p;
                        gram_line_quantiz = *blank_p >> *( uint_p[ push_back_a( self._lutReader.steps() ) ] % *blank_p ) >> +space_p;
                        gram_comment      = *blank_p >> ch_p( '#' ) >> *( anychar_p - '\n' ) >> +space_p;
                }

                boost::spirit::classic::rule<ScannerT> gram_test, gram_comment, gram_line_quantiz, gram_rgb, gram_3dl_spec;
                boost::spirit::classic::rule<ScannerT> const& start() const { return gram_3dl_spec; }
        };

        LutReader& _lutReader;
};

}

#endif