/usr/include/pdal/io/LasUtils.hpp is in libpdal-dev 1.4.0-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2015, Hobu Inc.
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* modification, are permitted provided that the following
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*
* * Redistributions of source code must retain the above copyright
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* * Redistributions in binary form must reproduce the above copyright
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* with the distribution.
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* 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
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#pragma once
#include <pdal/Dimension.hpp>
#include <pdal/DimType.hpp>
#include <string>
namespace pdal
{
enum class LasCompression
{
LasZip,
LazPerf,
None
};
inline std::istream& operator>>(std::istream& in, LasCompression& c)
{
std::string s;
in >> s;
s = Utils::toupper(s);
if (s == "LASZIP" || s == "TRUE")
c = LasCompression::LasZip;
else if (s == "LAZPERF")
c = LasCompression::LazPerf;
else
c = LasCompression::None;
return in;
}
inline std::ostream& operator<<(std::ostream& out, const LasCompression& c)
{
switch (c)
{
case LasCompression::LasZip:
out << "LasZip";
case LasCompression::LazPerf:
out << "LazPerf";
case LasCompression::None:
out << "None";
}
return out;
}
struct ExtraDim
{
ExtraDim(const std::string name, Dimension::Type type,
double scale = 1.0, double offset = 0.0) :
m_name(name), m_dimType(Dimension::Id::Unknown, type, scale, offset),
m_size(0)
{}
friend bool operator == (const ExtraDim& ed1, const ExtraDim& ed2);
std::string m_name;
DimType m_dimType;
size_t m_size; // Only set when type is None.
};
inline bool operator == (const ExtraDim& ed1, const ExtraDim& ed2)
{
// This is an incomplete comparison, but it should suffice since we
// only use it to compare an ExtraDim specified in an option with
// one created from a VLR entry.
return (ed1.m_name == ed2.m_name &&
ed1.m_dimType.m_type == ed2.m_dimType.m_type &&
ed1.m_size == ed2.m_size);
}
// This is the structure of each record in the extra bytes spec. Not used
// directly for storage, but here mostly for reference.
struct ExtraBytesSpec
{
char m_reserved[2];
uint8_t m_dataType;
uint8_t m_options;
char m_name[32];
char m_reserved2[4];
uint64_t m_noData[3]; // 24 = 3*8 bytes
double m_min[3]; // 24 = 3*8 bytes
double m_max[3]; // 24 = 3*8 bytes
double m_scale[3]; // 24 = 3*8 bytes
double m_offset[3]; // 24 = 3*8 bytes
char m_description[32];
};
class ExtraBytesIf
{
public:
ExtraBytesIf() : m_type(Dimension::Type::None), m_fieldCnt(0), m_size(0)
{
for (size_t i = 0; i < 3; ++i)
{
m_scale[i] = 1.0;
m_offset[i] = 0.0;
}
}
ExtraBytesIf(const std::string& name, Dimension::Type type,
const std::string& description) :
m_type(type), m_name(name), m_description(description), m_size(0)
{
for (size_t i = 0; i < 3; ++i)
{
// Setting the scale to 0 looks wrong, but it isn't. If the
// scale option flag isn't set, the scale is supposed to be 0.
// When we write the VLR, we always clear the scale flag.
m_scale[i] = 0.0;
m_offset[i] = 0.0;
}
m_fieldCnt = (m_type == Dimension::Type::None ? 0 : 1);
}
void appendTo(std::vector<uint8_t>& ebBytes);
void readFrom(const char *buf);
uint8_t lasType();
void setType(uint8_t lastype);
std::vector<ExtraDim> toExtraDims();
private:
Dimension::Type m_type;
unsigned m_fieldCnt; // Must be 0 - 3;
double m_scale[3];
double m_offset[3];
std::string m_name;
std::string m_description;
size_t m_size;
};
namespace LasUtils
{
std::vector<ExtraDim> parse(const StringList& dimString);
} // namespace LasUtils
} // namespace pdal
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