protected override void OnOpen(EndianBinaryReader reader)
{
/* Read header */
FileHeader = new TegraXTXFileHeader(reader);
/* Read blocks */
Blocks = new List <ITegraXTXBlock>();
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
long blockHeaderPosition = reader.BaseStream.Position;
TegraXTXBlockHeader blockHeader = new TegraXTXBlockHeader(reader);
reader.BaseStream.Seek((blockHeaderPosition + (long)blockHeader.DataOffset), SeekOrigin.Begin);
switch (blockHeader.BlockType)
{
case 0x02: Blocks.Add(new TegraXTXTextureInfo(blockHeader, reader)); break;
case 0x03: Blocks.Add(new TegraXTXTextureData(blockHeader, reader)); break;
}
reader.BaseStream.Seek((blockHeaderPosition + blockHeader.HeaderSize + (long)blockHeader.DataSize), SeekOrigin.Begin);
}
if (Blocks.Count(x => x is TegraXTXTextureInfo) != 1)
{
throw new Exception("Unexpected number of Tegra texture infos");
}
if (Blocks.Count(x => x is TegraXTXTextureData) != 1)
{
throw new Exception("Unexpected number of Tegra texture datas");
}
/* Read mipmaps */
var textureInfo = (Blocks.FirstOrDefault(x => x is TegraXTXTextureInfo) as TegraXTXTextureInfo);
var textureData = (Blocks.FirstOrDefault(x => x is TegraXTXTextureData) as TegraXTXTextureData);
if (!formatMap.ContainsKey(textureInfo.Format))
{
throw new Exception($"Unsupported Tegra pixel format {textureInfo.Format}");
}
mappingInfo = formatMap[textureInfo.Format];
using (EndianBinaryReader textureReader = new EndianBinaryReader(new MemoryStream(textureData.Data)))
{
mipmapData = new List <MipmapLevel>();
for (int i = 0; i < textureInfo.NumMipmaps; i++)
{
int mipWidth = (int)(textureInfo.Width >> i);
int mipHeight = (int)(textureInfo.Height >> i);
int mipDataSize = ((mappingInfo.Item2 * mipWidth) * mipHeight);
textureReader.BaseStream.Seek(textureInfo.MipmapOffsets[i], SeekOrigin.Begin);
byte[] mipPixelData = textureReader.ReadBytes(mipDataSize);
mipmapData.Add(new MipmapLevel(mipWidth, mipHeight, mipPixelData));
}
}
}
} // ???
public TegraXTXTextureInfo(TegraXTXBlockHeader header, EndianBinaryReader reader)
{
BlockHeader = header;
DataSize = reader.ReadUInt64();
Alignment = reader.ReadUInt32();
Width = reader.ReadUInt32();
Height = reader.ReadUInt32();
Depth = reader.ReadUInt32();
Target = reader.ReadUInt32();
Format = (TegraXTXPixelFormat)reader.ReadUInt32();
NumMipmaps = reader.ReadUInt32();
SliceSize = reader.ReadUInt32();
MipmapOffsets = new uint[17];
for (int i = 0; i < MipmapOffsets.Length; i++)
{
MipmapOffsets[i] = reader.ReadUInt32();
}
PackagedTextureLayout = reader.ReadUInt64();
Boolean = reader.ReadUInt32();
}
public TegraXTXTextureData(TegraXTXBlockHeader header, EndianBinaryReader reader)
{
BlockHeader = header;
Data = reader.ReadBytes((int)BlockHeader.DataSize);
}
