MRIOFormatsRegistry.h

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#pragma once
#include "MRMeshFwd.h"
#ifndef MR_PARSING_FOR_PB11_BINDINGS
#include "MRExpected.h"
#include "MRIOFilters.h"
#include "MRMeshLoadSettings.h"
#include "MROnInit.h"
#include "MRPointsLoadSettings.h"
#include "MRSaveSettings.h"
#include "MRLoadedObjects.h"
 
#include <filesystem>
#include <map>
 
#define MR_FORMAT_REGISTRY_EXTERNAL_DECL( API_ATTR, ProcName )                                               \
API_ATTR ProcName MR_CONCAT( get, ProcName )( const IOFilter& filter );                                      \
API_ATTR ProcName MR_CONCAT( get, ProcName )( const std::string& extension );                                \
API_ATTR void MR_CONCAT( set, ProcName )( const IOFilter& filter, ProcName proc, int8_t priorityScore = 0 ); \
API_ATTR const IOFilters& getFilters();
 
#define MR_FORMAT_REGISTRY_DECL( ProcName ) MR_FORMAT_REGISTRY_EXTERNAL_DECL( MRMESH_API, ProcName )
 
#define MR_FORMAT_REGISTRY_IMPL( ProcName )                                                         \
ProcName MR_CONCAT( get, ProcName )( const IOFilter& filter )                                       \
{                                                                                                   \
    return FormatRegistry<ProcName>::getProcessor( filter );                                        \
}                                                                                                   \
ProcName MR_CONCAT( get, ProcName )( const std::string& extension )                                 \
{                                                                                                   \
    return FormatRegistry<ProcName>::getProcessor( extension );                                     \
}                                                                                                   \
void MR_CONCAT( set, ProcName )( const IOFilter& filter, ProcName processor, int8_t priorityScore ) \
{                                                                                                   \
    FormatRegistry<ProcName>::setProcessor( filter, processor, priorityScore );                     \
}                                                                                                   \
const IOFilters& getFilters()                                                                       \
{                                                                                                   \
    return FormatRegistry<ProcName>::getFilters();                                                  \
}
 
namespace MR
{
 
MRMESH_API extern const IOFilters AllFilter;
 
template <typename Processor>
class FormatRegistry
{
public:
    // get all registered filters
    static const IOFilters& getFilters()
    {
        return get_().filters_;
    }
 
    // get a registered loader for the filter
    static Processor getProcessor( const IOFilter& filter )
    {
        const auto& processors = get_().processors_;
        auto it = processors.find( filter );
        if ( it != processors.end() )
            return it->second;
        else
            return {};
    }
 
    // get a registered loader for the extension
    static Processor getProcessor( const std::string& extension )
    {
        const auto& processors = get_().processors_;
        // TODO: extension cache
        auto it = std::find_if( processors.begin(), processors.end(), [&extension] ( auto&& item )
        {
            const auto& [filter, _] = item;
            return filter.isSupportedExtension( extension );
        } );
        if ( it != processors.end() )
            return it->second;
        else
            return {};
    }
 
    // register or update a loader for the filter
    static void setProcessor( const IOFilter& filter, Processor processor, int8_t priorityScore = 0 )
    {
        auto& processors = get_().processors_;
        auto it = processors.find( filter );
        if ( it != processors.end() )
        {
            it->second = processor;
        }
        else
        {
            processors.emplace( filter, processor );
 
            auto& filters = get_().filterPriorityQueue_;
            filters.emplace( priorityScore, filter );
            get_().updateFilterList_();
        }
    }
 
private:
    FormatRegistry() = default;
    ~FormatRegistry() = default;
 
    static FormatRegistry<Processor>& get_()
    {
        static FormatRegistry<Processor> instance;
        return instance;
    }
 
    void updateFilterList_()
    {
        filters_.clear();
        filters_.reserve( filterPriorityQueue_.size() );
        for ( const auto& [_, filter] : filterPriorityQueue_ )
            filters_.emplace_back( filter );
    }
 
    std::map<IOFilter, Processor> processors_;
    std::multimap<int8_t, IOFilter> filterPriorityQueue_;
    std::vector<IOFilter> filters_;
};
 
namespace MeshLoad
{
 
 
using MeshFileLoader = Expected<MR::Mesh>( * )( const std::filesystem::path&, const MeshLoadSettings& );
using MeshStreamLoader = Expected<MR::Mesh>( * )( std::istream&, const MeshLoadSettings& );
 
struct MeshLoader
{
    MeshFileLoader fileLoad{ nullptr };
    MeshStreamLoader streamLoad{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( MeshLoader )
 
 
#define MR_ADD_MESH_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::MeshLoad; setMeshLoader( filter, { static_cast<MeshFileLoader>( loader ), static_cast<MeshStreamLoader>( loader ) } ); };
 
#define MR_ADD_MESH_LOADER_WITH_PRIORITY( filter, loader, priority ) \
MR_ON_INIT { using namespace MR::MeshLoad; setMeshLoader( filter, { static_cast<MeshFileLoader>( loader ), static_cast<MeshStreamLoader>( loader ) }, priority ); };
 
 
} // namespace MeshLoad
 
namespace MeshSave
{
 
using MeshFileSaver = Expected<void>( * )( const Mesh&, const std::filesystem::path&, const SaveSettings& );
using MeshStreamSaver = Expected<void>( * )( const Mesh&, std::ostream&, const SaveSettings& );
 
struct MeshSaver
{
    MeshFileSaver fileSave{ nullptr };
    MeshStreamSaver streamSave{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( MeshSaver )
 
#define MR_ADD_MESH_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::MeshSave; setMeshSaver( filter, { static_cast<MeshFileSaver>( saver ), static_cast<MeshStreamSaver>( saver ) } ); };
 
#define MR_ADD_MESH_SAVER_WITH_PRIORITY( filter, saver, priority ) \
MR_ON_INIT { using namespace MR::MeshSave; setMeshSaver( filter, { static_cast<MeshFileSaver>( saver ), static_cast<MeshStreamSaver>( saver ) }, priority ); };
 
} // namespace MeshSave
 
namespace LinesLoad
{
 
using LinesFileLoader = Expected<Polyline3>( * )( const std::filesystem::path&, ProgressCallback );
using LinesStreamLoader = Expected<Polyline3>( * )( std::istream&, ProgressCallback );
 
struct LinesLoader
{
    LinesFileLoader fileLoad{ nullptr };
    LinesStreamLoader streamLoad{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( LinesLoader )
 
#define MR_ADD_LINES_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::LinesLoad; setLinesLoader( filter, { static_cast<LinesFileLoader>( loader ), static_cast<LinesStreamLoader>( loader ) } ); };
 
#define MR_ADD_LINES_LOADER_WITH_PRIORITY( filter, loader, priority ) \
MR_ON_INIT { using namespace MR::LinesLoad; setLinesLoader( filter, { static_cast<LinesFileLoader>( loader ), static_cast<LinesStreamLoader>( loader ) }, priority ); };
 
} // namespace LinesLoad
 
namespace LinesSave
{
 
using LinesFileSaver = Expected<void>( * )( const Polyline3&, const std::filesystem::path&, const SaveSettings& );
using LinesStreamSaver = Expected<void>( * )( const Polyline3&, std::ostream&, const SaveSettings& );
 
struct LinesSaver
{
    LinesFileSaver fileSave{ nullptr };
    LinesStreamSaver streamSave{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( LinesSaver )
 
#define MR_ADD_LINES_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::LinesSave; setLinesSaver( filter, { static_cast<LinesFileSaver>( saver ), static_cast<LinesStreamSaver>( saver ) } ); };
 
#define MR_ADD_LINES_SAVER_WITH_PRIORITY( filter, saver, priority ) \
MR_ON_INIT { using namespace MR::LinesSave; setLinesSaver( filter, { static_cast<LinesFileSaver>( saver ), static_cast<LinesStreamSaver>( saver ) }, priority ); };
 
} // namespace LinesSave
 
namespace PointsLoad
{
 
using PointsFileLoader = Expected<PointCloud>( * )( const std::filesystem::path&, const PointsLoadSettings& );
using PointsStreamLoader = Expected<PointCloud>( * )( std::istream&, const PointsLoadSettings& );
 
struct PointsLoader
{
    PointsFileLoader fileLoad{ nullptr };
    PointsStreamLoader streamLoad{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( PointsLoader )
 
#define MR_ADD_POINTS_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::PointsLoad; setPointsLoader( filter, { static_cast<PointsFileLoader>( loader ), static_cast<PointsStreamLoader>( loader ) } ); };
 
} // namespace PointsLoad
 
namespace PointsSave
{
 
using PointsFileSaver = Expected<void>( * )( const PointCloud&, const std::filesystem::path&, const SaveSettings& );
using PointsStreamSaver = Expected<void>( * )( const PointCloud&, std::ostream&, const SaveSettings& );
 
struct PointsSaver
{
    PointsFileSaver fileSave{ nullptr };
    PointsStreamSaver streamSave{ nullptr };
};
 
MR_FORMAT_REGISTRY_DECL( PointsSaver )
 
#define MR_ADD_POINTS_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::PointsSave; setPointsSaver( filter, { static_cast<PointsFileSaver>( saver ), static_cast<PointsStreamSaver>( saver ) } ); };
 
} // namespace PointsSave
 
namespace ImageLoad
{
 
using ImageLoader = Expected<Image>( * )( const std::filesystem::path& );
 
MR_FORMAT_REGISTRY_DECL( ImageLoader )
 
#define MR_ADD_IMAGE_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::ImageLoad; setImageLoader( filter, loader ); };
 
#define MR_ADD_IMAGE_LOADER_WITH_PRIORITY( filter, loader, priority ) \
MR_ON_INIT { using namespace MR::ImageLoad; setImageLoader( filter, loader, priority ); };
 
} // namespace ImageLoad
 
namespace ImageSave
{
 
using ImageSaver = Expected<void>( * )( const Image&, const std::filesystem::path& );
 
MR_FORMAT_REGISTRY_DECL( ImageSaver )
 
#define MR_ADD_IMAGE_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::ImageSave; setImageSaver( filter, saver ); };
 
#define MR_ADD_IMAGE_SAVER_WITH_PRIORITY( filter, saver, priority ) \
MR_ON_INIT { using namespace MR::ImageSave; setImageSaver( filter, saver, priority ); };
 
} // namespace ImageSave
 
namespace ObjectLoad
{
 
using ObjectLoader = Expected<LoadedObjects>( * )( const std::filesystem::path&, const ProgressCallback& );
 
MR_FORMAT_REGISTRY_DECL( ObjectLoader )
 
#define MR_ADD_OBJECT_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::ObjectLoad; setObjectLoader( filter, loader ); };
 
} // namespace ObjectLoad
 
namespace ObjectSave
{
 
using ObjectSaver = Expected<void>( * )( const Object&, const std::filesystem::path&, const ProgressCallback& );
 
MR_FORMAT_REGISTRY_DECL( ObjectSaver )
 
#define MR_ADD_OBJECT_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::ObjectSave; setObjectSaver( filter, saver ); };
 
} // namespace ObjectSave
 
namespace AsyncObjectLoad
{
 
using PostLoadCallback = std::function<void ( Expected<LoadedObjects> )>;
using ObjectLoader = void( * )( const std::filesystem::path&, PostLoadCallback, const ProgressCallback& );
 
MR_FORMAT_REGISTRY_DECL( ObjectLoader )
 
} // namespace AsyncObjectLoad
 
namespace SceneLoad
{
 
using SceneLoader = Expected<LoadedObject>( * )( const std::filesystem::path&, const ProgressCallback& );
 
MR_FORMAT_REGISTRY_DECL( SceneLoader )
 
#define MR_ADD_SCENE_LOADER( filter, loader ) \
MR_ON_INIT { using namespace MR::SceneLoad; setSceneLoader( filter, loader ); };
 
#define MR_ADD_SCENE_LOADER_WITH_PRIORITY( filter, loader, priority ) \
MR_ON_INIT { using namespace MR::SceneLoad; setSceneLoader( filter, loader, priority ); };
 
} // namespace SceneLoad
 
namespace SceneSave
{
 
using SceneSaver = Expected<void>( * )( const Object&, const std::filesystem::path&, ProgressCallback );
 
MR_FORMAT_REGISTRY_DECL( SceneSaver )
 
#define MR_ADD_SCENE_SAVER( filter, saver ) \
MR_ON_INIT { using namespace MR::SceneSave; setSceneSaver( filter, saver ); };
 
#define MR_ADD_SCENE_SAVER_WITH_PRIORITY( filter, saver, priority ) \
MR_ON_INIT { using namespace MR::SceneSave; setSceneSaver( filter, saver, priority ); };
 
} // namespace SceneSave
 
} // namespace MR
#endif