SpwImpl.h

//-*****************************************************************************
//
// Copyright (c) 2009-2012,
//  Sony Pictures Imageworks, Inc. and
//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// 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 Sony Pictures Imageworks, nor
// Industrial Light & Magic nor the names of their contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission.
//
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//-*****************************************************************************
 
#ifndef Alembic_AbcCoreHDF5_SpwImpl_h
#define Alembic_AbcCoreHDF5_SpwImpl_h
 
#include <Alembic/AbcCoreHDF5/Foundation.h>
#include <Alembic/AbcCoreHDF5/SimplePwImpl.h>
 
namespace Alembic {
namespace AbcCoreHDF5 {
namespace ALEMBIC_VERSION_NS {
 
//-*****************************************************************************
// This type is a no-op.
// It is here to support the template interface which, in order to generalize
// across arrays & scalars, needs a "key" type to compare array samples with.
class ScalarSampleKey
{
public:
    ScalarSampleKey(){}
};
 
//-*****************************************************************************
// Scalar Property Writer. 
class SpwImpl
    : public SimplePwImpl<AbcA::ScalarPropertyWriter,
                          SpwImpl,
                          const void *,
                          ScalarSampleKey>
    , public Alembic::Util::enable_shared_from_this<SpwImpl>
{
protected:
    friend class CpwData;
 
    //-*************************************************************************
    SpwImpl( AbcA::CompoundPropertyWriterPtr iParent,
             hid_t iParentGroup,
             const std::string & iName,
             const AbcA::MetaData & iMetaData,
             const AbcA::DataType & iDataType,
             uint32_t iTimeSamplingIndex );
 
    AbcA::ScalarPropertyWriterPtr asScalarPtr();
 
public:
    virtual ~SpwImpl();
 
    //-*************************************************************************
    // No-op return of no-op class.
    static ScalarSampleKey computeSampleKey( const void *iSamp )
    {
        return ScalarSampleKey();
    }
 
    //-*************************************************************************
    bool sameAsPreviousSample( const void *iSamp,
                               const ScalarSampleKey &iKey ) const
    {
        // CJH: Could include tolerances here.
        return m_previousSample.equalWithRelAbsError( iSamp,
                                                      1.0e-9 );
    }
 
    //-*************************************************************************
    void copyPreviousSample( hid_t iGroup,
                             const std::string &iSampleName,
                             index_t iSampleIndex );
 
    //-*************************************************************************
    void writeSample( hid_t iGroup,
                      const std::string &iSampleName,
                      index_t iSampleIndex,
                      const void *iSamp,
                      const ScalarSampleKey &iKey );
 
protected:
    // Use the AbcCoreAbstract's magnificent "ScalarSample"
    // helper class to keep track of our storage.
    AbcA::ScalarSample m_previousSample;
};
 
} // End namespace ALEMBIC_VERSION_NS
 
using namespace ALEMBIC_VERSION_NS;
 
} // End namespace AbcCoreHDF5
} // End namespace Alembic
 
#endif