IGroup.cpp
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//-*****************************************************************************
//
// Copyright (c) 2013,
// Sony Pictures Imageworks Inc. and
// Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
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#include "IGroup.h"
#include "IArchive.h"
#include "IStreams.h"
namespace Alembic {
namespace Ogawa {
namespace ALEMBIC_VERSION_NS {
class IGroup::PrivateData
{
public:
PrivateData(IStreamsPtr iStreams)
{
numChildren = 0;
pos = 0;
streams = iStreams;
}
~PrivateData() {}
IStreamsPtr streams;
std::vector<Alembic::Util::uint64_t> childVec;
Alembic::Util::uint64_t numChildren;
Alembic::Util::uint64_t pos;
};
IGroup::IGroup(IStreamsPtr iStreams,
Alembic::Util::uint64_t iPos,
bool iLight,
std::size_t iThreadIndex) :
mData(new IGroup::PrivateData(iStreams))
{
// all done, we have no children, or our streams aren't good
if (iPos == EMPTY_GROUP || !mData->streams || !mData->streams->isValid())
{
return;
}
mData->pos = iPos;
mData->streams->read(iThreadIndex, iPos, 8, &mData->numChildren);
// 0 should NOT have been written, this groups should have been the
// special EMPTY_GROUP instead
// read all our child indices, unless we are light and have more than 8
// children
if (!iLight || mData->numChildren < 9)
{
mData->childVec.resize(mData->numChildren);
mData->streams->read(iThreadIndex, iPos + 8, mData->numChildren * 8,
&(mData->childVec.front()));
}
}
IGroup::~IGroup()
{
}
IGroupPtr IGroup::getGroup(Alembic::Util::uint64_t iIndex, bool iLight,
std::size_t iThreadIndex)
{
IGroupPtr child;
if (isLight())
{
if (iIndex < mData->numChildren)
{
Alembic::Util::uint64_t childPos = 0;
mData->streams->read(iThreadIndex, mData->pos + 8 * iIndex + 8, 8,
&childPos);
// top bit should not be set for groups
if ((childPos & EMPTY_DATA) == 0)
{
child.reset(new IGroup(mData->streams, childPos, iLight,
iThreadIndex));
}
}
}
else if (isChildGroup(iIndex))
{
child.reset(new IGroup(mData->streams, mData->childVec[iIndex], iLight,
iThreadIndex));
}
return child;
}
IDataPtr IGroup::getData(Alembic::Util::uint64_t iIndex,
std::size_t iThreadIndex)
{
IDataPtr child;
if (isLight())
{
if (iIndex < mData->numChildren)
{
Alembic::Util::uint64_t childPos = 0;
mData->streams->read(iThreadIndex, mData->pos + 8 * iIndex + 8, 8,
&childPos);
// top bit should be set for data
if ((childPos & EMPTY_DATA) != 0)
{
child.reset(new IData(mData->streams, childPos, iThreadIndex));
}
}
}
else if (isChildData(iIndex))
{
child.reset(new IData(mData->streams, mData->childVec[iIndex],
iThreadIndex));
}
return child;
}
Alembic::Util::uint64_t IGroup::getNumChildren() const
{
return mData->numChildren;
}
bool IGroup::isChildGroup(Alembic::Util::uint64_t iIndex) const
{
return (iIndex < mData->childVec.size() &&
(mData->childVec[iIndex] & EMPTY_DATA) == 0);
}
bool IGroup::isChildData(Alembic::Util::uint64_t iIndex) const
{
return (iIndex < mData->childVec.size() &&
(mData->childVec[iIndex] & EMPTY_DATA) != 0);
}
bool IGroup::isEmptyChildGroup(Alembic::Util::uint64_t iIndex) const
{
return (iIndex < mData->childVec.size() &&
mData->childVec[iIndex] == EMPTY_GROUP);
}
bool IGroup::isEmptyChildData(Alembic::Util::uint64_t iIndex) const
{
return (iIndex < mData->childVec.size() &&
mData->childVec[iIndex] == EMPTY_DATA);
}
bool IGroup::isLight() const
{
return mData->numChildren != 0 && mData->childVec.empty();
}
} // End namespace ALEMBIC_VERSION_NS
} // End namespace Ogawa
} // End namespace Alembic
Alembic::Ogawa::ALEMBIC_VERSION_NS
Definition IArchive.cpp:40
Alembic::Ogawa
Definition OgawaFwd.h:78
Alembic
Definition OgawaFwd.h:77