LasIOFilter.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
// ##########################################################################
// #                                                                        #
// #                CloudViewer PLUGIN: LAS-IO Plugin                      #
// #                                                                        #
// #  This program is free software; you can redistribute it and/or modify  #
// #  it under the terms of the GNU General Public License as published by  #
// #  the Free Software Foundation; version 2 of the License.               #
// #                                                                        #
// #  This program 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 General Public License for more details.                          #
// #                                                                        #
// #                   COPYRIGHT: Thomas Montaigu                           #
// #                                                                        #
// ##########################################################################
 
#include "FileIOFilter.h"
#include "LasDetails.h"
#include "LasExtraScalarField.h"
#include "LasOpenDialog.h"
 
// System
#include <memory>
 
class LasIOFilter : public FileIOFilter
{
  public:
    LasIOFilter();
 
    // Inherited from FileIOFilter
    CC_FILE_ERROR loadFile(const QString& fileName, ccHObject& container, LoadParameters& parameters) override;
    bool          canSave(CV_CLASS_ENUM type, bool& multiple, bool& exclusive) const override;
    CC_FILE_ERROR saveToFile(ccHObject* entity, const QString& filename, const SaveParameters& parameters) override;
 
  private:
    struct FileInfo
    {
        LasDetails::LasVersion           version;
        std::vector<LasExtraScalarField> extraScalarFields;
 
        bool operator==(const FileInfo& other)
        {
            bool versionIsSame = version.minorVersion == other.version.minorVersion && version.pointFormat == other.version.pointFormat;
            if (!versionIsSame)
            {
                return false;
            }
 
            if (extraScalarFields.size() != other.extraScalarFields.size())
            {
                return false;
            }
 
            for (size_t i = 0; i < extraScalarFields.size(); ++i)
            {
                const auto& lhs = extraScalarFields[i];
                const auto& rhs = other.extraScalarFields[i];
 
                if (strncmp(lhs.name, rhs.name, LasExtraScalarField::MAX_NAME_SIZE) != 0
                    || lhs.type != rhs.type
                    || lhs.byteOffset != rhs.byteOffset
                    || lhs.numElements() != rhs.numElements()
                    || lhs.options != rhs.options)
                {
                    return false;
                }
            }
            return true;
        }
 
        bool operator!=(const FileInfo& other)
        {
            return !(*this == other);
        }
    };
 
    std::unique_ptr<FileInfo> m_infoOfLastOpened;
    LasOpenDialog             m_openDialog{};
};