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DbReader.cpp
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DbReader.cpp
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/******************************************************************************
* Copyright (c) 2014, Hobu Inc., hobu@hobu.co
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include <pdal/DbReader.hpp>
namespace pdal
{
void DbReader::loadSchema(PointContextRef ctx,
const std::string& schemaString)
{
XMLSchema schema(schemaString);
loadSchema(ctx, schema);
}
void DbReader::loadSchema(PointContextRef ctx, const XMLSchema& schema)
{
m_dims = schema.xmlDims();
// Override XYZ to doubles and use those going forward
// we will apply any scaling set before handing it off
// to PDAL.
ctx.registerDim(Dimension::Id::X);
ctx.registerDim(Dimension::Id::Y);
ctx.registerDim(Dimension::Id::Z);
m_packedPointSize = 0;
for (auto di = m_dims.begin(); di != m_dims.end(); ++di)
{
di->m_dimType.m_id =
ctx.registerOrAssignDim(di->m_name, di->m_dimType.m_type);
m_packedPointSize += Dimension::size(di->m_dimType.m_type);
}
}
DimTypeList DbReader::dbDimTypes() const
{
DimTypeList dimTypes;
for (auto di = m_dims.begin(); di != m_dims.end(); ++di)
dimTypes.push_back(di->m_dimType);
return dimTypes;
}
void DbReader::writeField(PointBuffer& pb, const char *pos, const DimType& dim,
PointId idx)
{
using namespace Dimension;
if (dim.m_type == Type::Signed32 &&
(dim.m_id == Id::X || dim.m_id == Id::Y || dim.m_id == Id::Z))
{
int32_t i;
memcpy(&i, pos, sizeof(int32_t));
double d = (i * dim.m_xform.m_scale) + dim.m_xform.m_offset;
pb.setField(dim.m_id, idx, d);
}
else
pb.setField(dim.m_id, dim.m_type, idx, pos);
}
/// Write a point's packed data into a buffer.
/// \param[in] pb PointBuffer to write to.
/// \param[in] idx Index of point to write.
/// \param[in] buf Pointer to packed DB point data.
void DbReader::writePoint(PointBuffer& pb, PointId idx, const char *buf)
{
using namespace Dimension;
for (auto di = m_dims.begin(); di != m_dims.end(); ++di)
{
DimType dimType = di->m_dimType;
// If we read X, Y or Z as a signed 32, apply the transform and write
// the transformed value (double).
if (dimType.m_type == Type::Signed32 &&
(dimType.m_id == Id::X || dimType.m_id == Id::Y ||
dimType.m_id == Id::Z))
{
int32_t i;
memcpy(&i, buf, sizeof(int32_t));
double d = (i * dimType.m_xform.m_scale) + dimType.m_xform.m_offset;
pb.setField(dimType.m_id, idx, d);
}
else
pb.setField(dimType.m_id, dimType.m_type, idx, buf);
buf += Dimension::size(dimType.m_type);
}
}
} // namespace pdal