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tinyply.cpp
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tinyply.cpp
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// This software is in the public domain. Where that dedication is not
// recognized, you are granted a perpetual, irrevocable license to copy,
// distribute, and modify this file as you see fit.
// Authored in 2015 by Dimitri Diakopoulos (http://www.dimitridiakopoulos.com)
// https://github.com/ddiakopoulos/tinyply
#include "tinyply.h"
using namespace tinyply;
using namespace std;
//////////////////
// PLY Property //
//////////////////
PlyProperty::PlyProperty(std::istream & is) : isList(false)
{
parse_internal(is);
}
void PlyProperty::parse_internal(std::istream & is)
{
string type;
is >> type;
if (type == "list")
{
string countType;
is >> countType >> type;
listType = property_type_from_string(countType);
isList = true;
}
propertyType = property_type_from_string(type);
is >> name;
}
/////////////////
// PLY Element //
/////////////////
PlyElement::PlyElement(std::istream & is)
{
parse_internal(is);
}
void PlyElement::parse_internal(std::istream & is)
{
is >> name >> size;
}
//////////////
// PLY File //
//////////////
PlyFile::PlyFile(std::istream & is)
{
if (!parse_header(is))
{
throw std::runtime_error("file is not ply or encounted junk in header");
}
}
bool PlyFile::parse_header(std::istream & is)
{
std::string line;
bool gotMagic = false;
while (std::getline(is, line))
{
std::istringstream ls(line);
std::string token;
ls >> token;
if (token == "ply" || token == "PLY" || token == "")
{
gotMagic = true;
continue;
}
else if (token == "comment") read_header_text(line, ls, comments, 8);
else if (token == "format") read_header_format(ls);
else if (token == "element") read_header_element(ls);
else if (token == "property") read_header_property(ls);
else if (token == "obj_info") read_header_text(line, ls, objInfo, 9);
else if (token == "end_header") break;
else return false;
}
return true;
}
void PlyFile::read_header_text(std::string line, std::istream & is, std::vector<std::string>& place, int erase)
{
place.push_back((erase > 0) ? line.erase(0, erase) : line);
}
void PlyFile::read_header_format(std::istream & is)
{
std::string s;
(is >> s);
if (s == "binary_little_endian") isBinary = true;
else if (s == "binary_big_endian") isBinary = isBigEndian = true;
}
void PlyFile::read_header_element(std::istream & is)
{
get_elements().emplace_back(is);
}
void PlyFile::read_header_property(std::istream & is)
{
get_elements().back().properties.emplace_back(is);
}
size_t PlyFile::skip_property_binary(const PlyProperty & property, std::istream & is)
{
static std::vector<char> skip(PropertyTable[property.propertyType].stride);
if (property.isList)
{
size_t listSize = 0;
size_t dummyCount = 0;
read_property_binary(property.listType, &listSize, dummyCount, is);
for (size_t i = 0; i < listSize; ++i) is.read(skip.data(), PropertyTable[property.propertyType].stride);
return listSize;
}
else
{
is.read(skip.data(), PropertyTable[property.propertyType].stride);
return 0;
}
}
void PlyFile::skip_property_ascii(const PlyProperty & property, std::istream & is)
{
std::string skip;
if (property.isList)
{
int listSize;
is >> listSize;
for (int i = 0; i < listSize; ++i) is >> skip;
}
else is >> skip;
}
void PlyFile::read_property_binary(PlyProperty::Type t, void * dest, size_t & destOffset, std::istream & is)
{
static std::vector<char> src(PropertyTable[t].stride);
is.read(src.data(), PropertyTable[t].stride);
switch (t)
{
case PlyProperty::Type::INT8: ply_cast<int8_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::UINT8: ply_cast<uint8_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::INT16: ply_cast<int16_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::UINT16: ply_cast<uint16_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::INT32: ply_cast<int32_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::UINT32: ply_cast<uint32_t>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::FLOAT32: ply_cast_float<float>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::FLOAT64: ply_cast_double<double>(dest, src.data(), isBigEndian); break;
case PlyProperty::Type::INVALID: throw std::invalid_argument("invalid ply property");
}
destOffset += PropertyTable[t].stride;
}
void PlyFile::read_property_ascii(PlyProperty::Type t, void * dest, size_t & destOffset, std::istream & is)
{
switch (t)
{
case PlyProperty::Type::INT8: *((int8_t *)dest) = ply_read_ascii<int32_t>(is); break;
case PlyProperty::Type::UINT8: *((uint8_t *)dest) = ply_read_ascii<uint32_t>(is); break;
case PlyProperty::Type::INT16: ply_cast_ascii<int16_t>(dest, is); break;
case PlyProperty::Type::UINT16: ply_cast_ascii<uint16_t>(dest, is); break;
case PlyProperty::Type::INT32: ply_cast_ascii<int32_t>(dest, is); break;
case PlyProperty::Type::UINT32: ply_cast_ascii<uint32_t>(dest, is); break;
case PlyProperty::Type::FLOAT32: ply_cast_ascii<float>(dest, is); break;
case PlyProperty::Type::FLOAT64: ply_cast_ascii<double>(dest, is); break;
case PlyProperty::Type::INVALID: throw std::invalid_argument("invalid ply property");
}
destOffset += PropertyTable[t].stride;
}
void PlyFile::write_property_ascii(PlyProperty::Type t, std::ostream & os, uint8_t * src, size_t & srcOffset)
{
switch (t)
{
case PlyProperty::Type::INT8: os << static_cast<int32_t>(*reinterpret_cast<int8_t*>(src)); break;
case PlyProperty::Type::UINT8: os << static_cast<uint32_t>(*reinterpret_cast<uint8_t*>(src)); break;
case PlyProperty::Type::INT16: os << *reinterpret_cast<int16_t*>(src); break;
case PlyProperty::Type::UINT16: os << *reinterpret_cast<uint16_t*>(src); break;
case PlyProperty::Type::INT32: os << *reinterpret_cast<int32_t*>(src); break;
case PlyProperty::Type::UINT32: os << *reinterpret_cast<uint32_t*>(src); break;
case PlyProperty::Type::FLOAT32: os << *reinterpret_cast<float*>(src); break;
case PlyProperty::Type::FLOAT64: os << *reinterpret_cast<double*>(src); break;
case PlyProperty::Type::INVALID: throw std::invalid_argument("invalid ply property");
}
os << " ";
srcOffset += PropertyTable[t].stride;
}
void PlyFile::write_property_binary(PlyProperty::Type t, std::ostream & os, uint8_t * src, size_t & srcOffset)
{
os.write((char *)src, PropertyTable[t].stride);
srcOffset += PropertyTable[t].stride;
}
void PlyFile::read(std::istream & is)
{
read_internal(is);
}
void PlyFile::write(std::ostream & os, bool isBinary)
{
if (isBinary) write_binary_internal(os);
else write_ascii_internal(os);
}
void PlyFile::write_binary_internal(std::ostream & os)
{
isBinary = true;
write_header(os);
for (auto & e : elements)
{
for (size_t i = 0; i < e.size; ++i)
{
for (auto & p : e.properties)
{
auto & cursor = userDataTable[make_key(e.name, p.name)];
if (p.isList)
{
uint8_t listSize[4] = {0, 0, 0, 0};
memcpy(listSize, &p.listCount, sizeof(uint32_t));
size_t dummyCount = 0;
write_property_binary(p.listType, os, listSize, dummyCount);
for (int j = 0; j < p.listCount; ++j)
{
write_property_binary(p.propertyType, os, (cursor->data + cursor->offset), cursor->offset);
}
}
else
{
write_property_binary(p.propertyType, os, (cursor->data + cursor->offset), cursor->offset);
}
}
}
}
}
void PlyFile::write_ascii_internal(std::ostream & os)
{
write_header(os);
for (auto & e : elements)
{
for (size_t i = 0; i < e.size; ++i)
{
for (auto & p : e.properties)
{
auto & cursor = userDataTable[make_key(e.name, p.name)];
if (p.isList)
{
os << p.listCount << " ";
for (int j = 0; j < p.listCount; ++j)
{
write_property_ascii(p.propertyType, os, (cursor->data + cursor->offset), cursor->offset);
}
}
else
{
write_property_ascii(p.propertyType, os, (cursor->data + cursor->offset), cursor->offset);
}
}
os << std::endl;
}
}
}
void PlyFile::write_header(std::ostream & os)
{
const std::locale & fixLoc = std::locale("C");
os.imbue(fixLoc);
os << "ply" << std::endl;
if (isBinary)
os << ((isBigEndian) ? "format binary_big_endian 1.0" : "format binary_little_endian 1.0") << std::endl;
else
os << "format ascii 1.0" << std::endl;
for (const auto & comment : comments)
os << "comment " << comment << std::endl;
for (auto & e : elements)
{
os << "element " << e.name << " " << e.size << std::endl;
for (const auto & p : e.properties)
{
if (p.isList)
{
os << "property list " << PropertyTable[p.listType].str << " "
<< PropertyTable[p.propertyType].str << " " << p.name << std::endl;
}
else
{
os << "property " << PropertyTable[p.propertyType].str << " " << p.name << std::endl;
}
}
}
os << "end_header" << std::endl;
}
void PlyFile::read_internal(std::istream & is)
{
std::function<void(PlyProperty::Type t, void * dest, size_t & destOffset, std::istream & is)> read;
std::function<void(const PlyProperty & property, std::istream & is)> skip;
if (isBinary)
{
read = [&](PlyProperty::Type t, void * dest, size_t & destOffset, std::istream & is) { read_property_binary(t, dest, destOffset, is); };
skip = [&](const PlyProperty & property, std::istream & is) { skip_property_binary(property, is); };
}
else
{
read = [&](PlyProperty::Type t, void * dest, size_t & destOffset, std::istream & is) { read_property_ascii(t, dest, destOffset, is); };
skip = [&](const PlyProperty & property, std::istream & is) { skip_property_ascii(property, is); };
}
for (auto & element : get_elements())
{
if (std::find(requestedElements.begin(), requestedElements.end(), element.name) != requestedElements.end())
{
for (size_t count = 0; count < element.size; ++count)
{
for (auto & property : element.properties)
{
if (auto & cursor = userDataTable[make_key(element.name, property.name)])
{
if (property.isList)
{
size_t listSize = 0;
size_t dummyCount = 0;
read(property.listType, &listSize, dummyCount, is);
if (cursor->realloc == false)
{
cursor->realloc = true;
resize_vector(property.propertyType, cursor->vector, listSize * element.size, cursor->data);
}
for (size_t i = 0; i < listSize; ++i)
{
read(property.propertyType, (cursor->data + cursor->offset), cursor->offset, is);
}
}
else
{
read(property.propertyType, (cursor->data + cursor->offset), cursor->offset, is);
}
}
else
{
skip(property, is);
}
}
}
}
else continue;
}
}