public async Task Load(IFileSystem fileSystem, UPath filePath, LoadContext loadContext)
{
var fileStream = await fileSystem.OpenFileAsync(filePath);
// Decompress, if necessary
using var br = new BinaryReaderX(fileStream, true);
fileStream.Position = 9;
if (br.ReadString(4) == "nns_")
{
_wasCompressed = true;
fileStream.Position = 0;
var decompressedStream = new MemoryStream();
NintendoCompressor.Decompress(fileStream, decompressedStream);
fileStream.Close();
fileStream = decompressedStream;
}
fileStream.Position = 0;
Images = new List <IKanvasImage> {
new KanvasImage(EncodingDefinition, _img.Load(fileStream))
};
}
private IList <ChnkSection> ReadSections(BinaryReaderX br)
{
// Read raw chunks
var chunks = new List <ChnkSection>();
while (br.BaseStream.Position < br.BaseStream.Length)
{
chunks.Add(br.ReadType <ChnkSection>());
}
// Decompress chunk data
foreach (var chunk in chunks)
{
if (chunk.decompressedSize == 0)
{
continue;
}
var ms = new MemoryStream();
NintendoCompressor.Decompress(new MemoryStream(chunk.data), ms);
ms.Position = 0;
chunk.data = ms.ToArray();
}
return(chunks);
}
private Stream Decompress(Stream input)
{
using var br = new BinaryReaderX(input, true);
input.Position = 5;
var magic = br.ReadString(4);
if (magic != "F3XT")
{
_wasCompressed = false;
return(input);
}
_wasCompressed = true;
var ms = new MemoryStream();
input.Position = 0;
_compMethod = NintendoCompressor.PeekCompressionMethod(input);
NintendoCompressor.Decompress(input, ms);
ms.Position = 0;
return(ms);
}
private Stream Decompress(Stream input)
{
var output = new MemoryStream();
NintendoCompressor.Decompress(input, output);
output.Position = 0;
return(output);
}