public static void DecompressTexture(byte[] DecompressedBuffer, MemoryStream stream, StorageTypes type, int uncompressedSize, int compressedSize)
{
uint blockTag = stream.ReadUInt32();
if (blockTag != textureTag)
{
throw new Exception("Texture tag wrong");
}
uint blockSize = stream.ReadUInt32();
if (blockSize != maxBlockSize)
{
throw new Exception("Texture header broken");
}
uint compressedChunkSize = stream.ReadUInt32();
uint uncompressedChunkSize = stream.ReadUInt32();
if (uncompressedChunkSize != uncompressedSize)
{
throw new Exception("Texture header broken");
}
uint blocksCount = (uncompressedChunkSize + maxBlockSize - 1) / maxBlockSize;
if ((compressedChunkSize + SizeOfChunk + SizeOfChunkBlock * blocksCount) != compressedSize)
{
throw new Exception("Texture header broken");
}
var blocks = new List <ChunkBlock>();
for (uint b = 0; b < blocksCount; b++)
{
ChunkBlock block = new ChunkBlock
{
comprSize = stream.ReadUInt32(),
uncomprSize = stream.ReadUInt32()
};
blocks.Add(block);
}
for (int b = 0; b < blocks.Count; b++)
{
ChunkBlock block = blocks[b];
block.compressedBuffer = stream.ReadToBuffer(blocks[b].comprSize);
block.uncompressedBuffer = new byte[maxBlockSize * 2];
blocks[b] = block;
}
Parallel.For(0, blocks.Count, b =>
{
uint dstLen;
ChunkBlock block = blocks[b];
if (type == StorageTypes.extLZO || type == StorageTypes.pccLZO)
{
dstLen = LZO2.Decompress(block.compressedBuffer, block.comprSize, block.uncompressedBuffer);
}
else if (type == StorageTypes.extZlib || type == StorageTypes.pccZlib)
{
dstLen = Zlib.Decompress(block.compressedBuffer, block.comprSize, block.uncompressedBuffer);
}
else if (type == StorageTypes.extLZMA)
{
block.uncompressedBuffer = LZMA.Decompress(block.compressedBuffer, block.uncomprSize);
dstLen = (uint)block.uncompressedBuffer.Length;
}
else
{
throw new Exception("Compression type not expected!");
}
if (dstLen != block.uncomprSize)
{
throw new Exception("Decompressed data size not expected!");
}
});
int dstPos = 0;
for (int b = 0; b < blocks.Count; b++)
{
Buffer.BlockCopy(blocks[b].uncompressedBuffer, 0, DecompressedBuffer, dstPos, (int)blocks[b].uncomprSize);
dstPos += (int)blocks[b].uncomprSize;
}
}
