C++ (Cpp) Dimension::getByteOffset示例

示例#1

void IteratorBase::copyDatabaseData(PointBuffer& source,
                                    PointBuffer& destination,
                                    Dimension const& dest_dim,
                                    boost::uint32_t source_starting_position,
                                    boost::uint32_t destination_starting_position,
                                    boost::uint32_t howMany)
{

    boost::optional<Dimension const&> source_dim = source.getSchema().getDimensionOptional(dest_dim.getName());

    if (!source_dim)
    {
        return;
    }

    for (boost::uint32_t i = 0; i < howMany; ++i)
    {
        if (dest_dim.getInterpretation() == source_dim->getInterpretation() &&
                dest_dim.getByteSize() == source_dim->getByteSize() &&
                pdal::Utils::compare_distance(dest_dim.getNumericScale(), source_dim->getNumericScale()) &&
                pdal::Utils::compare_distance(dest_dim.getNumericOffset(), source_dim->getNumericOffset()) &&
                dest_dim.getEndianness() == source_dim->getEndianness()
           )
        {
            // FIXME: This test could produce false positives
            boost::uint8_t* source_position = source.getData(source_starting_position+i) + source_dim->getByteOffset();
            boost::uint8_t* destination_position = destination.getData(destination_starting_position + i) + dest_dim.getByteOffset();
            memcpy(destination_position, source_position, source_dim->getByteSize());
        }
        else
        {
            PointBuffer::scaleData(source,
                                   destination,
                                   *source_dim,
                                   dest_dim,
                                   source_starting_position + i,
                                   destination_starting_position + i);
        }
    }

}