static IECore::ConstCompoundDataPtr metadataGetter( const std::string &key, size_t &cost )
{
cost = 1;
if( !key.size() )
{
return NULL;
}
const char *searchPath = getenv( "OSL_SHADER_PATHS" );
OSLQuery query;
if( !query.open( key, searchPath ? searchPath : "" ) )
{
throw Exception( query.error() );
}
CompoundDataPtr metadata = new CompoundData;
metadata->writable()["shader"] = convertMetadata( query.metadata() );
CompoundDataPtr parameterMetadata = new CompoundData;
metadata->writable()["parameter"] = parameterMetadata;
for( size_t i = 0; i < query.nparams(); ++i )
{
const OSLQuery::Parameter *parameter = query.getparam( i );
if( parameter->metadata.size() )
{
parameterMetadata->writable()[parameter->name] = convertMetadata( parameter->metadata );
}
}
return metadata;
}
void OSLShader::loadShader( const std::string &shaderName, bool keepExistingValues )
{
const char *searchPath = getenv( "OSL_SHADER_PATHS" );
OSLQuery query;
if( !query.open( shaderName, searchPath ? searchPath : "" ) )
{
throw Exception( query.error() );
}
loadShaderParameters( query, parametersPlug(), keepExistingValues );
if( query.shadertype() == "shader" )
{
CompoundPlug *existingOut = getChild<CompoundPlug>( "out" );
if( !existingOut || existingOut->typeId() != CompoundPlug::staticTypeId() )
{
CompoundPlugPtr outPlug = new CompoundPlug( "out", Plug::Out, Plug::Default | Plug::Dynamic );
setChild( "out", outPlug );
}
loadShaderParameters( query, getChild<CompoundPlug>( "out" ), keepExistingValues );
}
else
{
Plug *existingOut = getChild<Plug>( "out" );
if( !existingOut || existingOut->typeId() != Plug::staticTypeId() )
{
PlugPtr outPlug = new Plug( "out", Plug::Out, Plug::Default | Plug::Dynamic );
setChild( "out", outPlug );
}
}
namePlug()->setValue( shaderName );
typePlug()->setValue( "osl:" + query.shadertype() );
m_metadata = NULL;
}
