assimp-fez/code/FBXExportProperty.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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following disclaimer.

* Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/
#ifndef ASSIMP_BUILD_NO_EXPORT
#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER

#include "FBXExportProperty.h"

#include <assimp/StreamWriter.h> // StreamWriterLE
#include <assimp/Exceptional.h> // DeadlyExportError

#include <string>
#include <vector>
#include <sstream> // stringstream


// constructors for single element properties

FBX::Property::Property(bool v)
    : type('C'), data(1)
{
    data = {uint8_t(v)};
}

FBX::Property::Property(int16_t v) : type('Y'), data(2)
{
    uint8_t* d = data.data();
    (reinterpret_cast<int16_t*>(d))[0] = v;
}

FBX::Property::Property(int32_t v) : type('I'), data(4)
{
    uint8_t* d = data.data();
    (reinterpret_cast<int32_t*>(d))[0] = v;
}

FBX::Property::Property(float v) : type('F'), data(4)
{
    uint8_t* d = data.data();
    (reinterpret_cast<float*>(d))[0] = v;
}

FBX::Property::Property(double v) : type('D'), data(8)
{
    uint8_t* d = data.data();
    (reinterpret_cast<double*>(d))[0] = v;
}

FBX::Property::Property(int64_t v) : type('L'), data(8)
{
    uint8_t* d = data.data();
    (reinterpret_cast<int64_t*>(d))[0] = v;
}


// constructors for array-type properties

FBX::Property::Property(const char* c, bool raw)
    : Property(std::string(c), raw)
{}

// strings can either be saved as "raw" (R) data, or "string" (S) data
FBX::Property::Property(const std::string& s, bool raw)
    : type(raw ? 'R' : 'S'), data(s.size())
{
    for (size_t i = 0; i < s.size(); ++i) {
        data[i] = uint8_t(s[i]);
    }
}

FBX::Property::Property(const std::vector<uint8_t>& r)
    : type('R'), data(r)
{}

FBX::Property::Property(const std::vector<int32_t>& va)
    : type('i'), data(4*va.size())
{
    int32_t* d = reinterpret_cast<int32_t*>(data.data());
    for (size_t i = 0; i < va.size(); ++i) { d[i] = va[i]; }
}

FBX::Property::Property(const std::vector<double>& va)
    : type('d'), data(8*va.size())
{
    double* d = reinterpret_cast<double*>(data.data());
    for (size_t i = 0; i < va.size(); ++i) { d[i] = va[i]; }
}

FBX::Property::Property(const aiMatrix4x4& vm)
    : type('d'), data(8*16)
{
    double* d = reinterpret_cast<double*>(data.data());
    for (size_t c = 0; c < 4; ++c) {
        for (size_t r = 0; r < 4; ++r) {
            d[4*c+r] = vm[r][c];
        }
    }
}

// public member functions

size_t FBX::Property::size()
{
    switch (type) {
    case 'C': case 'Y': case 'I': case 'F': case 'D': case 'L':
        return data.size() + 1;
    case 'S': case 'R':
        return data.size() + 5;
    case 'i': case 'd':
        return data.size() + 13;
    default:
        throw DeadlyExportError("Requested size on property of unknown type");
    }
}

void FBX::Property::Dump(Assimp::StreamWriterLE &s)
{
    s.PutU1(type);
    uint8_t* d;
    size_t N;
    switch (type) {
    case 'C': s.PutU1(*(reinterpret_cast<uint8_t*>(data.data()))); return;
    case 'Y': s.PutI2(*(reinterpret_cast<int16_t*>(data.data()))); return;
    case 'I': s.PutI4(*(reinterpret_cast<int32_t*>(data.data()))); return;
    case 'F': s.PutF4(*(reinterpret_cast<float*>(data.data()))); return;
    case 'D': s.PutF8(*(reinterpret_cast<double*>(data.data()))); return;
    case 'L': s.PutI8(*(reinterpret_cast<int64_t*>(data.data()))); return;
    case 'S':
    case 'R':
        s.PutU4(data.size());
        for (size_t i = 0; i < data.size(); ++i) { s.PutU1(data[i]); }
        return;
    case 'i':
        N = data.size() / 4;
        s.PutU4(N); // number of elements
        s.PutU4(0); // no encoding (1 would be zip-compressed)
        // TODO: compress if large?
        s.PutU4(data.size()); // data size
        d = data.data();
        for (size_t i = 0; i < N; ++i) {
            s.PutI4((reinterpret_cast<int32_t*>(d))[i]);
        }
        return;
    case 'd':
        N = data.size() / 8;
        s.PutU4(N); // number of elements
        s.PutU4(0); // no encoding (1 would be zip-compressed)
        // TODO: compress if large?
        s.PutU4(data.size()); // data size
        d = data.data();
        for (size_t i = 0; i < N; ++i) {
            s.PutF8((reinterpret_cast<double*>(d))[i]);
        }
        return;
    default:
        std::stringstream err;
        err << "Tried to dump property with invalid type '";
        err << type << "'!";
        throw DeadlyExportError(err.str());
    }
}

#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
#endif // ASSIMP_BUILD_NO_EXPORT