/// <summary>
/// Read the Texture MCNK from the texture ADT.
/// </summary>
public static void ReadTexMCNK(BinaryReader reader, uint mcnkSize, ADTModel model)
{
var startPosition = reader.BaseStream.Position;
var texMcnk = new TexMCNKChunk();
while (reader.BaseStream.Position < startPosition + mcnkSize)
{
var chunkId = (Chunks)reader.ReadUInt32();
var chunkSize = reader.ReadUInt32();
switch (chunkId)
{
case Chunks.MCLY: // Texture Layers.
ReadMCLY(reader, chunkSize, texMcnk);
break;
case Chunks.MCAL: // Alpha Layers.
ReadMCAL(reader, texMcnk, model.WdtFileDataId, chunkSize);
break;
default:
reader.Skip(chunkSize);
break;
}
}
model.TexMCNKs.Add(texMcnk);
}
/// <summary>
/// Read texture data from MCLY.
/// </summary>
public static void ReadMCLY(BinaryReader reader, uint chunkSize, TexMCNKChunk chunk)
{
var layerCount = chunkSize / 16;
chunk.LayerCount = layerCount;
chunk.TextureIds = new uint[layerCount];
chunk.LayerOffsetInMCAL = new uint[layerCount];
chunk.AlphaMapCompressed = new bool[layerCount];
for (var i = 0; i < layerCount; ++i)
{
chunk.TextureIds[i] = reader.ReadUInt32();
var bitArray = new byte[4];
reader.Read(bitArray, 0, 4);
var flags = new BitArray(bitArray);
chunk.AlphaMapCompressed[i] = flags[9];
chunk.LayerOffsetInMCAL[i] = reader.ReadUInt32();
var effectId = reader.ReadUInt32();
}
}
/// <summary>
/// Read Alpha Layers from MCAL.
/// </summary>
public static void ReadMCAL(BinaryReader reader, TexMCNKChunk chunk, uint wdtFileDataId, uint chunkSize)
{
var mphd = WDTData.MPHDs[wdtFileDataId];
var mcal = new MCAL[chunk.LayerCount];
mcal[0] = new MCAL
{
Layer = new byte[64 * 64]
};
Parallel.For(0, 64 * 64, i => { mcal[0].Layer[i] = 255; });
var readOffset = 0;
for (var i = 1; i < chunk.LayerCount; ++i)
{
if (chunk.LayerOffsetInMCAL[i] != readOffset)
{
Debug.LogError("Mismatch: layer boefre required more/less bytes than expected");
}
if (chunk.AlphaMapCompressed[i])
{
mcal[i] = new MCAL
{
Layer = new byte[64 * 64]
};
var inOffset = 0;
var outOffset = 0;
while (outOffset < 4096)
{
var info = reader.ReadByte(); ++inOffset;
var mode = (uint)(info & 0x80) >> 7;
var count = (uint)(info & 0x7F);
if (mode != 0)
{
var val = reader.ReadByte(); ++inOffset;
while (count-- > 0 && outOffset < 4096)
{
mcal[i].Layer[outOffset] = val;
++outOffset;
}
}
else
{
while (count-- > 0 && outOffset < 4096)
{
var val = reader.ReadByte(); ++inOffset;
mcal[i].Layer[outOffset] = val;
++outOffset;
}
}
}
readOffset += inOffset;
if (outOffset != 4096)
{
Debug.LogError($"OutOffset is not 4096! {outOffset}");
}
}
else if (mphd.Flags.HasFlag(MPHDFlags.AdtHasBigAlpha) || mphd.Flags.HasFlag(MPHDFlags.AdtHasHeightTexturing))
{
mcal[i] = new MCAL
{
Layer = reader.ReadBytes(4096)
};
readOffset += 4096;
}
else
{
mcal[i] = new MCAL
{
Layer = new byte[64 * 64]
};
var mcalData = reader.ReadBytes(2048);
readOffset += 2048;
for (var j = 0; j < 2048; ++j)
{
mcal[i].Layer[2 * j + 0] = (byte)(((mcalData[j] & 0x0F) >> 0) * 17);
mcal[i].Layer[2 * j + 1] = (byte)(((mcalData[j] & 0xF0) >> 4) * 17);
}
}
}
if (readOffset != chunkSize)
{
throw new Exception($"ReadOffset is not 4096! {readOffset}");
}
chunk.AlphaLayers = mcal;
}