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From Wang Rui, "I'd like to submit my inbuilt schema data support of

Browse Source 
the OutputStream/InputStream implementations, which was just finished
last weekend with a few tests on Windows and Ubuntu. Hope it could
work and get more feedbacks soon.

I've added a new option "SchemaData" to the osg2 plugin. Developers
may test the new feature with the command line:

# osgconv cow.osg cow.osgb -O SchemaData

It will record all serializer properties used in the scene graph, at
the beginning of the generated file. And when osgviewer and user
applications is going to read the osgb file, the inbuilt data will be
automatically read and applied first, to keep backwards compatibility
partly. This will not affect osgb files generated with older versions.
"
This commit is contained in:
Robert Osfield
2010-05-12 20:02:31 +00:00
parent a04d83efa7
commit 42527fe859
5 changed files with 117 additions and 38 deletions
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104
src/osgDB/OutputStream.cpp
View File

@@ -22,7 +22,7 @@
using namespace osgDB;
OutputStream::OutputStream( const osgDB::Options* options )
: _writeImageHint(WRITE_USE_IMAGE_HINT)
: _writeImageHint(WRITE_USE_IMAGE_HINT), _useSchemaData(false)
{
if ( !options ) return;
_options = options;
@@ -36,6 +36,10 @@ OutputStream::OutputStream( const osgDB::Options* options )
{
// Omit this
}
else if ( option=="SchemaData" )
{
_useSchemaData = true;
}
else
{
StringList keyAndValues;
@@ -422,13 +426,32 @@ void OutputStream::writeObject( const osg::Object* obj )
const StringList& associates = wrapper->getAssociates();
for ( StringList::const_iterator itr=associates.begin(); itr!=associates.end(); ++itr )
{
ObjectWrapper* assocWrapper = Registry::instance()->getObjectWrapperManager()->findWrapper(*itr);
const std::string& assocName = *itr;
ObjectWrapper* assocWrapper = Registry::instance()->getObjectWrapperManager()->findWrapper(assocName);
if ( !assocWrapper )
{
osg::notify(osg::WARN) << "OutputStream::writeObject(): Unsupported associated class "
<< *itr << std::endl;
<< assocName << std::endl;
continue;
}
else if ( _useSchemaData )
{
if ( _inbuiltSchemaMap.find(assocName)==_inbuiltSchemaMap.end() )
{
StringList properties;
assocWrapper->writeSchema( properties );
if ( properties.size()>0 )
{
std::string propertiesString;
for ( StringList::iterator sitr=properties.begin(); sitr!=properties.end(); ++sitr )
{
propertiesString += *sitr;
propertiesString += ' ';
}
_inbuiltSchemaMap[assocName] = propertiesString;
}
}
}
_fields.push_back( assocWrapper->getName() );
assocWrapper->write( *this, *obj );
@@ -455,8 +478,16 @@ void OutputStream::start( OutputIterator* outIterator, OutputStream::WriteType t
{
*this << (unsigned int)type << (unsigned int)PLUGIN_VERSION;
if ( sizeof(osg::Matrix::value_type)==FLOAT_SIZE ) *this << (unsigned int)0;
else *this << (unsigned int)1; // Record matrix value type of current built OSG
bool useCompressSource = false;
unsigned int attributes = 0;
if ( sizeof(osg::Matrix::value_type)!=FLOAT_SIZE )
attributes |= 0x1; // Record matrix value type of current built OSG
if ( _useSchemaData )
{
attributes |= 0x2; // Record if we use inbuilt schema data or not
useCompressSource = true;
}
*this << attributes;
if ( !_compressorName.empty() )
{
@@ -465,16 +496,22 @@ void OutputStream::start( OutputIterator* outIterator, OutputStream::WriteType t
{
osg::notify(osg::WARN) << "OutputStream::start(): No such compressor "
<< _compressorName << std::endl;
_compressorName.clear();
}
else
{
*this << _compressorName;
_out->flush();
_out->setStream( &_compressSource );
return;
useCompressSource = true;
}
}
*this << std::string("0");
if ( !_compressorName.empty() ) *this << _compressorName;
else *this << std::string("0"); // No compressor
// Compressors and inbuilt schema use a new stream, which will be merged with the original one at the end.
if ( useCompressSource )
{
_out->flush();
_out->setStream( &_compressSource );
}
}
else
{
@@ -498,20 +535,51 @@ void OutputStream::start( OutputIterator* outIterator, OutputStream::WriteType t
void OutputStream::compress( std::ostream* ostream )
{
if ( _compressorName.empty() || !isBinary() ) return;
_fields.clear();
_fields.push_back( "Compression" );
if ( !isBinary() ) return;
BaseCompressor* compressor = Registry::instance()->getObjectWrapperManager()->findCompressor(_compressorName);
if ( !compressor || !ostream )
std::stringstream schemaSource;
if ( _useSchemaData )
{
_fields.push_back( "SchemaData" );
std::string schemaData;
for ( std::map<std::string, std::string>::iterator itr=_inbuiltSchemaMap.begin();
itr!=_inbuiltSchemaMap.end(); ++itr )
{
schemaData += itr->first + '=';
schemaData += itr->second;
schemaData += '\n';
}
int size = schemaData.size();
schemaSource.write( (char*)&size, INT_SIZE );
schemaSource.write( schemaData.c_str(), size );
_inbuiltSchemaMap.clear();
_fields.pop_back();
return;
}
if ( !compressor->compress(*ostream, _compressSource.str()) )
throwException( "OutputStream: Failed to compress stream." );
_fields.pop_back();
if ( !_compressorName.empty() )
{
_fields.push_back( "Compression" );
BaseCompressor* compressor = Registry::instance()->getObjectWrapperManager()->findCompressor(_compressorName);
if ( !compressor || !ostream )
{
_fields.pop_back();
return;
}
if ( !compressor->compress(*ostream, schemaSource.str() + _compressSource.str()) )
throwException( "OutputStream: Failed to compress stream." );
if ( getException() ) return;
_fields.pop_back();
}
else if ( _useSchemaData )
{
std::string str = schemaSource.str() + _compressSource.str();
ostream->write( str.c_str(), str.size() );
}
}
void OutputStream::writeSchema( std::ostream& fout )