void UnpackV2()
{
Format = PixelFormats.Bgra32;
int tile_count = m_input.ReadInt32();
var tiles = new List <Tile> (tile_count);
for (int i = 0; i < tile_count; ++i)
{
var tile = new Tile();
tile.X = m_input.ReadInt32();
tile.Y = m_input.ReadInt32();
tiles.Add(tile);
m_input.Seek(0x10, SeekOrigin.Current);
}
using (var input = new BinMemoryStream(LzDecompress(m_input, 2, 1)))
{
if (input.ReadInt32() != tile_count)
{
throw new InvalidFormatException();
}
int dst_stride = m_width * 4;
m_output = new byte[m_height * dst_stride];
for (int i = 0; i < tile_count; ++i)
{
tiles[i].Offset = input.ReadUInt32();
tiles[i].Length = input.ReadInt32();
}
var tile = tiles.First(t => t.Length != 0);
input.Position = tile.Offset;
int tile_type = input.ReadUInt16();
int count = input.ReadUInt16();
if (tile_type != 1)
{
throw new InvalidFormatException();
}
input.Seek(0x70, SeekOrigin.Current);
for (int i = 0; i < count; ++i)
{
int tile_x = input.ReadUInt16();
int tile_y = input.ReadUInt16();
input.ReadInt16();
int tile_width = input.ReadUInt16();
int tile_height = input.ReadUInt16();
input.Seek(0x52, SeekOrigin.Current);
tile_x += tile.X;
tile_y += tile.Y;
if (tile_x + tile_width > m_width || tile_y + tile_height > m_height)
{
throw new InvalidFormatException();
}
int dst = tile_y * dst_stride + tile_x * 4;
int tile_stride = tile_width * 4;
for (int row = 0; row < tile_height; ++row)
{
input.Read(m_output, dst, tile_stride);
dst += dst_stride;
}
}
}
}