View of /trunk/src/examples/eqPly/initData.cpp

/*
 * Copyright (c) 2006-2007, Stefan Eilemann <[email protected]> 
 * All rights reserved. 
 *
 * The init data manages static, per-instance application data. In this
 * example, it holds the model file name, and manages the instanciation of the
 * frame data. The instance data is constructed dynamically (due to the use of a
 * string) and cached for further use. The frame data is instanciated seperately
 * for each thread, so that multiple pipe threads on a node can render different
 * frames concurrently.
 */
#include "initData.h"
using namespace eqBase;
using namespace std;
namespace eqPly
{
InitData::InitData()
        : _filename( "rockerArm.ply" ),
          _instanceData( 0 )
{}
InitData::~InitData()
{
    setFrameDataID( EQ_ID_INVALID );
}
const void* InitData::getInstanceData( uint64_t* size )
{
    *size = sizeof( uint32_t ) + _filename.length() + 1;
    if( _instanceData )
        return _instanceData;
    _instanceData = new char[ *size ];
    reinterpret_cast< uint32_t* >( _instanceData )[0] =  _frameDataID;
    const char* string = _filename.c_str();
    memcpy( _instanceData + sizeof( uint32_t ), string, _filename.length()+1 );
    return _instanceData;
}
void InitData::applyInstanceData( const void* data, const uint64_t size )
{
    EQASSERT( size > sizeof( _frameDataID ));
    _frameDataID = reinterpret_cast< const uint32_t* >( data )[0];
    _filename    = static_cast<const char*>( data ) + sizeof( uint32_t );
    EQASSERT( _frameDataID != EQ_ID_INVALID );
    EQINFO << "New InitData instance" << endl;
}
void InitData::_clearInstanceData()
{
    delete [] _instanceData;
    _instanceData = 0;
}
}