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PointContext.hpp
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PointContext.hpp
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/******************************************************************************
* Copyright (c) 2014, Hobu Inc.
*
* 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. or Flaxen Geo Consulting 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.
****************************************************************************/
#pragma once
#include <map>
#include <memory>
#include <vector>
#include "pdal/Dimension.hpp"
#include "pdal/Metadata.hpp"
#include "pdal/RawPtBuf.hpp"
namespace pdal
{
class PointBuffer;
class PointContext;
namespace plang
{
class BufferedInvocation;
}
struct DimInfo
{
DimInfo() : m_detail(Dimension::COUNT), m_nextFree(Dimension::PROPRIETARY)
{}
std::vector<Dimension::Detail> m_detail;
Dimension::IdList m_used;
std::map<std::string, Dimension::Id::Enum> m_propIds;
int m_nextFree;
};
typedef std::shared_ptr<DimInfo> DimInfoPtr;
// This provides a context for processing a set of points and allows the library
// to be used to process multiple point sets simultaneously.
class PointContext
{
friend class PointBuffer;
friend class plang::BufferedInvocation;
private:
DimInfoPtr m_dims;
// Provides storage for the point data.
RawPtBufPtr m_ptBuf;
// Metadata storage;
MetadataPtr m_metadata;
public:
PointContext() : m_dims(new DimInfo()), m_ptBuf(new RawPtBuf()),
m_metadata(new Metadata)
{}
RawPtBuf *rawPtBuf() const
{ return m_ptBuf.get(); }
MetadataNode metadata()
{ return m_metadata->getNode(); }
SpatialReference spatialRef() const
{
MetadataNode m = m_metadata->m_private.findChild("spatialreference");
SpatialReference sref;
sref.setWKT(m.value());
return sref;
}
void setSpatialRef(const SpatialReference& sref)
{
MetadataNode mp = m_metadata->m_private;
mp.addOrUpdate("spatialreference", sref.getRawWKT());
}
void registerDims(std::vector<Dimension::Id::Enum> ids)
{
for (auto ii = ids.begin(); ii != ids.end(); ++ii)
registerDim(*ii);
}
void registerDims(Dimension::Id::Enum *id)
{
while (*id != Dimension::Id::Unknown)
registerDim(*id++);
}
void registerDim(Dimension::Id::Enum id)
{
registerDim(id, Dimension::defaultType(id));
}
// Register the dimension with the requested type if it hasn't already
// been registered with a "larger" type. If the type of the dimension
// is already larger, this does nothing.
void registerDim(Dimension::Id::Enum id, Dimension::Type::Enum type)
{
Dimension::Detail& dd = m_dims->m_detail[id];
if (dd.type() == Dimension::Type::None)
m_dims->m_used.push_back(id);
dd.m_type = resolveType(type, dd.m_type);
update();
}
// The type and size are REQUESTS, not absolutes. If someone else
// has already registered with the same name, you get the existing
// dimension size/type.
Dimension::Id::Enum assignDim(const std::string& name,
Dimension::Type::Enum type)
{
Dimension::Id::Enum id;
auto di = m_dims->m_propIds.find(name);
if (di == m_dims->m_propIds.end())
{
id = (Dimension::Id::Enum)m_dims->m_nextFree++;
m_dims->m_propIds[name] = id;
m_dims->m_used.push_back(id);
}
else
id = di->second;
m_dims->m_detail[id].m_type =
resolveType(m_dims->m_detail[id].m_type, type);
update();
return id;
}
Dimension::Id::Enum registerOrAssignDim(const std::string name,
Dimension::Type::Enum type)
{
Dimension::Id::Enum id = Dimension::id(name);
if (id != Dimension::Id::Unknown)
{
registerDim(id, type);
return id;
}
return assignDim(name, type);
}
DimTypeList dimTypes() const
{
DimTypeList dimTypes;
const Dimension::IdList& ids = dims();
for (auto ii = ids.begin(); ii != ids.end(); ++ii)
dimTypes.push_back(DimType(*ii, dimType(*ii)));
return dimTypes;
}
DimType findDimType(const std::string& name) const
{
Dimension::Id::Enum id = findDim(name);
return DimType(id, dimType(id));
}
Dimension::Id::Enum findDim(const std::string& name) const
{
Dimension::Id::Enum id = Dimension::id(name);
if (dimType(id) != Dimension::Type::None)
return id;
return findProprietaryDim(name);
}
Dimension::Id::Enum findProprietaryDim(const std::string& name) const
{
auto di = m_dims->m_propIds.find(name);
return (di != m_dims->m_propIds.end() ? di->second :
Dimension::Id::Unknown);
}
std::string dimName(Dimension::Id::Enum id) const
{
std::string name = Dimension::name(id);
if (!name.empty())
return name;
for (auto pi = m_dims->m_propIds.begin();
pi != m_dims->m_propIds.end(); ++pi)
if (pi->second == id)
return pi->first;
return "";
}
// @return whether or not the PointContext contains a given id
bool hasDim(Dimension::Id::Enum id) const
{ return m_dims->m_detail[id].m_type != Dimension::Type::None; }
// @return reference to vector of currently used dimensions
const Dimension::IdList& dims() const
{ return m_dims->m_used; }
// @return the current type for a given id
Dimension::Type::Enum dimType(Dimension::Id::Enum id) const
{
return dimDetail(id)->type();
}
// @return the current size in bytes of the dimension
// with the given id.
size_t dimSize(Dimension::Id::Enum id) const
{ return dimDetail(id)->size(); }
size_t pointSize() const
{
size_t size(0);
for (const auto& d : m_dims->m_detail)
size += d.size();
return size;
}
private:
Dimension::Detail *dimDetail(Dimension::Id::Enum id) const
{ return &(m_dims->m_detail[(size_t)id]); }
void update()
{
auto sorter = [this](const Dimension::Id::Enum& d1,
const Dimension::Id::Enum& d2) -> bool
{
size_t s1 = m_dims->m_detail[d1].size();
size_t s2 = m_dims->m_detail[d2].size();
if (s1 > s2)
return true;
if (s1 < s2)
return false;
return d1 < d2;
};
Dimension::IdList& used = m_dims->m_used;
std::sort(used.begin(), used.end(), sorter);
int offset = 0;
for (auto ui = used.begin(); ui != used.end(); ++ui)
{
m_dims->m_detail[*ui].m_offset = offset;
offset += (int)m_dims->m_detail[*ui].size();
}
m_ptBuf->setPointSize((size_t)offset);
}
Dimension::Type::Enum resolveType(Dimension::Type::Enum t1,
Dimension::Type::Enum t2)
{
using namespace Dimension;
using namespace Dimension::BaseType;
if (t1 == Type::None && t2 != Type::None)
return t2;
if (t2 == Type::None && t1 != Type::None)
return t1;
if (t1 == t2)
return t1;
if (base(t1) == base(t2))
return std::max(t1, t2);
//Prefer floating to non-floating.
if (base(t1) == Floating && base(t2) != Floating)
return t1;
if (base(t2) == Floating && base(t1) != Floating)
return t2;
// Now we're left with cases of a signed/unsigned mix.
// If the unsigned type is smaller, take the signed type.
if (base(t1) == Unsigned && size(t1) < size(t2))
return t2;
if (base(t2) == Unsigned && size(t2) < size(t1))
return t1;
// Signed type is smaller or the the sizes are equal.
switch (std::max(size(t1), size(t2)))
{
case 1:
return Type::Signed16;
case 2:
return Type::Signed32;
case 4:
return Type::Signed64;
default:
return Type::Double;
}
}
};
// A point context is in some instances more easily understood as a reference.
typedef PointContext PointContextRef;
} //namespace