public void Save(Stream output, ImageInfo imageInfo)
{
using var ms = new MemoryStream();
using var bw = new BinaryWriterX(ms);
// Calculate offsets
var nodeOffset = _header.nodeOffset;
var dataOffset = nodeOffset + _nodeRegion.Length;
var postOffset = dataOffset + imageInfo.ImageData.Length;
// Write data regions
ms.Position = nodeOffset;
bw.Write(_nodeRegion);
ms.Position = dataOffset;
bw.Write(imageInfo.ImageData);
ms.Position = postOffset;
bw.Write(_postData);
// Update header
_header.nodeOffset = nodeOffset;
_header.dataOffset = dataOffset;
_header.dataSize = imageInfo.ImageData.Length;
_header.postOffset = postOffset;
_header.postSize = _postData.Length;
_header.format = imageInfo.ImageFormat;
_header.width = imageInfo.ImageSize.Width;
_header.height = imageInfo.ImageSize.Height;
// Write header
ms.Position = 0;
bw.WriteType(_header);
// Compress with ZLib
output = new IntiCreatesCipherStream(output, "obj90210");
using var outBw = new BinaryWriterX(output);
ms.Position = 0;
using var compStream = new MemoryStream();
Compressions.ZLib.Build().Compress(ms, compStream);
// Write compressed data
output.Position = 0;
outBw.Write((int)ms.Length);
compStream.Position = 0;
compStream.CopyTo(output);
}
public ImageInfo Load(Stream input, Platform platform)
{
input = new IntiCreatesCipherStream(input, "obj90210");
// Decompress ZLib data
var ms = new MemoryStream();
Compressions.ZLib.Build().Decompress(new SubStream(input, 4, input.Length - 4), ms);
using var br = new BinaryReaderX(ms);
// Read header
br.BaseStream.Position = 0;
_header = br.ReadType <OsbHeader>();
// Read node region
br.BaseStream.Position = _header.nodeOffset;
_nodeRegion = br.ReadBytes(_header.dataOffset - _header.nodeOffset);
// Read image data
br.BaseStream.Position = _header.dataOffset;
var imgData = br.ReadBytes(_header.dataSize);
// Read post data
br.BaseStream.Position = _header.postOffset;
_postData = br.ReadBytes(_header.postSize);
// Create image info
var imageInfo = new ImageInfo(imgData, _header.format, new Size(_header.width, _header.height));
if (platform == Platform.N3DS)
{
imageInfo.RemapPixels.With(context => new CtrSwizzle(context, CtrTransformation.YFlip));
}
return(imageInfo);
}
