Method ReadImage2DData

plugins/e57/libE57Format/src/ReaderImpl.cpp:556–615

Reads the image data block

   // Reads the image data block
   size_t ReaderImpl::ReadImage2DData( int64_t imageIndex, Image2DProjection imageProjection,
                                       Image2DType imageType, uint8_t *pBuffer, int64_t start,
                                       size_t count ) const
   {
      if ( ( imageIndex < 0 ) || ( imageIndex >= images2D_.childCount() ) )
      {
         return 0;
      }

      const StructureNode image( images2D_.get( imageIndex ) );

      switch ( imageProjection )
      {
         case ProjectionNone:
            return 0;

         case ProjectionVisual:
            if ( image.isDefined( "visualReferenceRepresentation" ) )
            {
               const StructureNode visualReferenceRepresentation(
                  image.get( "visualReferenceRepresentation" ) );

               return _readImage2DNode( visualReferenceRepresentation, imageType, pBuffer, start,
                                        count );
            }
            break;

         case ProjectionPinhole:
            if ( image.isDefined( "pinholeRepresentation" ) )
            {
               const StructureNode pinholeRepresentation( image.get( "pinholeRepresentation" ) );

               return _readImage2DNode( pinholeRepresentation, imageType, pBuffer, start, count );
            }
            break;

         case ProjectionSpherical:
            if ( image.isDefined( "sphericalRepresentation" ) )
            {
               const StructureNode sphericalRepresentation(
                  image.get( "sphericalRepresentation" ) );

               return _readImage2DNode( sphericalRepresentation, imageType, pBuffer, start, count );
            }
            break;

         case ProjectionCylindrical:
            if ( image.isDefined( "cylindricalRepresentation" ) )
            {
               const StructureNode cylindricalRepresentation(
                  image.get( "cylindricalRepresentation" ) );

               return _readImage2DNode( cylindricalRepresentation, imageType, pBuffer, start,
                                        count );
            }
            break;
      }