public IList <ImageInfo> Load(Stream input)
{
using var br = new BinaryReaderX(_file = input, true);
// Read header
_header = br.ReadType <BchHeader>();
if (_header.dataSize == 0)
{
return(Array.Empty <ImageInfo>());
}
// Read PICA commands
_picaReaders = new List <PICACommandReader>();
var gpuStream = new SubStream(input, _header.gpuCommandsOffset, _header.gpuCommandsSize);
while (gpuStream.Position < gpuStream.Length)
{
_picaReaders.Add(new PICACommandReader(gpuStream));
}
// Add images
var result = new List <ImageInfo>();
foreach (var picaReader in _picaReaders)
{
var size = picaReader.getTexUnit0Size();
if (size.Width == 0 || size.Height == 0)
{
continue;
}
// Read main image
var format = (int)picaReader.getTexUnit0Format();
var bitDepth = BchSupport.GetEncodingDefinition().GetColorEncoding(format).BitDepth;
input.Position = _header.dataOffset + picaReader.getTexUnit0Address();
var dataLength = size.Width * size.Height * bitDepth / 8;
var imageData = br.ReadBytes(dataLength);
// Read mip maps
var mipCount = picaReader.getTexUnit0LoD();
var mipMaps = new byte[mipCount][];
for (var i = 1; i <= mipCount; i++)
{
mipMaps[i - 1] = br.ReadBytes((size.Width >> i) * (size.Height >> i) * bitDepth / 8);
}
result.Add(mipCount > 0
? new ImageInfo(imageData, mipMaps, format, size)
: new ImageInfo(imageData, format, size));
result[^ 1].RemapPixels.With(context => new CtrSwizzle(context));
public BchState()
{
_bch = new Bch();
EncodingDefinition = BchSupport.GetEncodingDefinition();
}