void UWorldComposition::OnLevelPostLoad(ULevel* InLevel)
{
UPackage* LevelPackage = Cast<UPackage>(InLevel->GetOutermost());
if (LevelPackage && InLevel->OwningWorld)
{
FWorldTileInfo Info;
UWorld* World = InLevel->OwningWorld;
if (World->WorldComposition)
{
// Assign WorldLevelInfo previously loaded by world composition
FWorldCompositionTile* Tile = World->WorldComposition->FindTileByName(LevelPackage->GetFName());
if (Tile)
{
Info = Tile->Info;
}
}
else
{
#if WITH_EDITOR
// Preserve FWorldTileInfo in case sub-level was loaded in the editor outside of world composition
FString PackageFilename = FPackageName::LongPackageNameToFilename(LevelPackage->GetName(), FPackageName::GetMapPackageExtension());
FWorldTileInfo::Read(PackageFilename, Info);
#endif //WITH_EDITOR
}
const bool bIsDefault = (Info == FWorldTileInfo());
if (!bIsDefault)
{
LevelPackage->WorldTileInfo = new FWorldTileInfo(Info);
}
}
}
FWorldTileInfo UWorldComposition::GetTileInfo(const FName& InPackageName) const
{
FWorldCompositionTile* Tile = FindTileByName(InPackageName);
if (Tile)
{
return Tile->Info;
}
return FWorldTileInfo();
}
bool FWorldTileInfo::Read(const FString& InPackageFileName, FWorldTileInfo& OutInfo)
{
// Fill with default information
OutInfo = FWorldTileInfo();
// Create a file reader to load the file
TScopedPointer<FArchive> FileReader(IFileManager::Get().CreateFileReader(*InPackageFileName));
if (FileReader == NULL)
{
// Couldn't open the file
return false;
}
// Read package file summary from the file
FPackageFileSummary FileSummary;
(*FileReader) << FileSummary;
// Make sure this is indeed a package
if (FileSummary.Tag != PACKAGE_FILE_TAG)
{
// Unrecognized or malformed package file
return false;
}
// Does the package contains a level info?
if (FileSummary.WorldTileInfoDataOffset != 0)
{
if (!!(FileSummary.PackageFlags & PKG_StoreCompressed))
{
check(FileSummary.CompressedChunks.Num() > 0);
if (!FileReader->SetCompressionMap(&FileSummary.CompressedChunks, (ECompressionFlags)FileSummary.CompressionFlags))
{
FileReader = new FArchiveAsync(*InPackageFileName); // re-assign scope pointer
check(!FileReader->IsError());
verify(FileReader->SetCompressionMap(&FileSummary.CompressedChunks, (ECompressionFlags)FileSummary.CompressionFlags));
}
}
// Seek the the part of the file where the structure lives
FileReader->Seek(FileSummary.WorldTileInfoDataOffset);
//make sure the filereader gets the correct version number (it defaults to latest version)
FileReader->SetUE4Ver(FileSummary.GetFileVersionUE4());
FileReader->SetEngineVer(FileSummary.EngineVersion);
// Load the structure
*FileReader << OutInfo;
}
return true;
}