public ImageInfo Load(Stream input)
{
using var br = new BinaryReaderX(input);
// Read header
_header = br.ReadType <BtxHeader>();
// Read name
input.Position = _header.nameOffset;
var name = br.ReadCStringASCII();
// Read image data
var dataLength = _header.width * _header.height * BtxSupport.GetBitDepth(_header.format) / 8;
input.Position = _header.dataOffset;
var imgData = br.ReadBytes(dataLength);
// Read mip levels
IList <byte[]> mips = new List <byte[]>();
for (var i = 0; i < _header.mipLevels; i++)
{
dataLength = (_header.width << (i + 1)) * (_header.height << (i + 1)) * BtxSupport.GetBitDepth(_header.format) / 8;
mips.Add(br.ReadBytes(dataLength));
}
// Read palette data
var paletteLength = Math.Max(0, (int)input.Length - _header.paletteOffset);
input.Position = _header.paletteOffset;
var paletteData = br.ReadBytes(paletteLength);
// Create image info
var imageInfo = new ImageInfo(imgData, _header.format, new Size(_header.width, _header.height))
{
Name = name
};
if (paletteLength > 0)
{
imageInfo.PaletteData = paletteData;
imageInfo.PaletteFormat = 0;
}
if (_header.mipLevels > 0)
{
imageInfo.MipMapData = mips;
}
switch (_header.swizzleMode)
{
case 1:
imageInfo.RemapPixels.With(context => new VitaSwizzle(context));
break;
}
return(imageInfo);
}
public BtxState()
{
_btx = new BTX();
EncodingDefinition = BtxSupport.GetEncodingDefinition();
}