qgslazdecoder.h

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/***************************************************************************
                         qgslazdecoder.h
                         --------------------
    begin                : March 2022
    copyright            : (C) 2022 by Belgacem Nedjima
    email                : belgacem dot nedjima at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSLAZDECODER_H
#define QGSLAZDECODER_H
 
 
#include <string>
 
#include "qgspointcloudattribute.h"
#include "qgspointcloudblock.h"
 
#include <QString>
 
#define SIP_NO_FILE

 
 
class QgsPointCloudExpression;
class QgsLazInfo;
class QgsRectangle;
 
template<typename T> bool lazStoreToStream_( char *s, size_t position, QgsPointCloudAttribute::DataType type, T value );
bool lazSerialize_( char *data, size_t outputPosition, QgsPointCloudAttribute::DataType outputType, const char *input, QgsPointCloudAttribute::DataType inputType, int inputSize, size_t inputPosition );
 
class QgsLazDecoder
{
  public:
    enum class LazAttribute
    {
      X,
      Y,
      Z,
      Classification,
      Intensity,
      ReturnNumber,
      NumberOfReturns,
      ScanDirectionFlag,
      EdgeOfFlightLine,
      ScanAngleRank,
      UserData,
      PointSourceId,
      GpsTime,
      Red,
      Green,
      Blue,
      ScannerChannel,
      Synthetic,
      KeyPoint,
      Withheld,
      Overlap,
      NIR,
      ExtraBytes,
      MissingOrUnknown
    };
 
    struct RequestedAttributeDetails
    {
        RequestedAttributeDetails( LazAttribute attribute, QgsPointCloudAttribute::DataType type, int size, int offset = -1 )
          : attribute( attribute )
          , type( type )
          , size( size )
          , offset( offset )
        {}
 
        LazAttribute attribute;
        QgsPointCloudAttribute::DataType type;
        int size;
        int offset; // Used in case the attribute is an extra byte attribute
    };
 
    static std::unique_ptr<QgsPointCloudBlock> decompressLaz(
      const QString &filename, const QgsPointCloudAttributeCollection &requestedAttributes, QgsPointCloudExpression &filterExpression, QgsRectangle &filterRect
    );
    static std::unique_ptr<QgsPointCloudBlock> decompressLaz(
      const QByteArray &data, const QgsPointCloudAttributeCollection &requestedAttributes, QgsPointCloudExpression &filterExpression, QgsRectangle &filterRect
    );
    static std::unique_ptr<QgsPointCloudBlock> decompressCopc(
      const QByteArray &data, QgsLazInfo &lazInfo, int32_t pointCount, const QgsPointCloudAttributeCollection &requestedAttributes, QgsPointCloudExpression &filterExpression, QgsRectangle &filterRect
    );
 
#if defined( _MSC_VER )

    static std::wstring toNativePath( const QString &filename );
#else
    static std::string toNativePath( const QString &filename );
#endif
};

#endif // QGSLAZDECODER_H