private async Task LoadChunk(FileStream saveFile, int x, int y, int seed)
{
byte[] row = await this.ReferenceTableLookup(saveFile, 0, x, y);
if (row == null)
{
this.chunks.Add(new Chunk(x, y).Generate(seed));
}
else
{
Chunk chunk = new Chunk(x, y);
byte[] buffer = new byte[4 * Chunk.size * Chunk.size];
await saveFile.ReadAsync(buffer, BitConverter.ToInt32(row, 0), buffer.Length);
for (int j = 0; j < Chunk.size; j++)
{
for (int k = 0; k < Chunk.size; k++)
{
chunk.SetTile(k, j, BitConverter.ToInt32(buffer, (j * Chunk.size + k) * 4));
}
}
this.chunks.Add(chunk);
}
}
private async Task UnloadChunk(FileStream saveFile, Chunk chunk)
{
byte[] buffer = new byte[Chunk.size * Chunk.size * 4];
byte[] row = await this.ReferenceTableLookup(saveFile, 0, chunk.X, chunk.Y);
for (int j = 0; j < Chunk.size; j++)
{
for (int k = 0; k < Chunk.size; k++)
{
BitConverter.GetBytes(chunk.GetTile(k, j)).CopyTo(buffer, (j * Chunk.size + k) * 4);
}
}
if (row == null)
{
byte[] temp = new byte[4];
int offset = 0;
do
{
await saveFile.ReadAsync(temp, offset, 1);
if (temp[0] == 255)
{
await saveFile.ReadAsync(temp, offset + 1 + 256 * 16, 4);
offset = BitConverter.ToInt32(temp, 0);
}
}
while (temp[0] == 255);
byte[] refRow = new byte[16];
BitConverter.GetBytes(chunk.X).CopyTo(refRow, 0);
BitConverter.GetBytes(chunk.Y).CopyTo(refRow, 4);
BitConverter.GetBytes(saveFile.Length).CopyTo(refRow, 8);
await saveFile.WriteAsync(buffer, (int)saveFile.Length, buffer.Length);
//TODO: Fix reference point
BitConverter.GetBytes(0).CopyTo(refRow, 12);
await saveFile.WriteAsync(refRow, offset + temp[0] * 16, 16);
}
else
{
await saveFile.WriteAsync(buffer, BitConverter.ToInt32(row, 0), buffer.Length);
}
saveFile.Close();
}