IECore::ImagePrimitivePtr ToGLTextureConverter::imageFromCompoundData( IECore::CompoundData::ConstPtr data ) const
{
if ( ! data )
{
throw IECore::Exception( "No CompoundData supplied." );
}
IECore::Box2iDataPtr dataWindow = 0;
IECore::CompoundDataMap::const_iterator itData = data->readable().find( "dataWindow" );
if ( itData == data->readable().end() )
{
throw IECore::Exception( "Invalid CompoundData supplied. ImagePrimitive representations need a dataWindow (Box2i)." );
}
dataWindow = IECore::runTimeCast<IECore::Box2iData>( itData->second );
IECore::Box2iDataPtr screenWindow = 0;
itData = data->readable().find( "displayWindow" );
if ( itData == data->readable().end() )
{
throw IECore::Exception( "Invalid CompoundData supplied. ImagePrimitive representations need a screenWindow (Box2i)." );
}
screenWindow = IECore::runTimeCast<IECore::Box2iData>( itData->second );
IECore::CompoundDataPtr channels = 0;
itData = data->readable().find( "channels" );
if ( itData == data->readable().end() )
{
throw IECore::Exception( "Invalid CompoundData supplied. ImagePrimitive representations need a CompoundDataMap of channels." );
}
channels = IECore::runTimeCast<IECore::CompoundData>( itData->second );
if ( !dataWindow || !screenWindow || !channels )
{
throw IECore::Exception( "Invalid CompoundData representation supplied. Some data is of the wrong type" );
}
IECore::ImagePrimitivePtr newImage = new IECore::ImagePrimitive( dataWindow->readable(), screenWindow->readable() );
for (
IECore::CompoundDataMap::const_iterator itChannels = channels->readable().begin();
itChannels != channels->readable().end();
itChannels++
)
{
IECore::FloatVectorDataPtr channelData = IECore::runTimeCast<IECore::FloatVectorData>( itChannels->second );
if ( ! channelData )
{
throw IECore::Exception( "Invalid channel data found in ImagePrimitive representation, only 32bit float data is supported. Please check texture.");
}
newImage->variables.insert( IECore::PrimitiveVariableMap::value_type( itChannels->first, IECore::PrimitiveVariable( IECore::PrimitiveVariable::Vertex, channelData ) ) );
}
return newImage;
}
