///<summary>Decode, decompress, and reorder rows of global tile IDs</summary>
uint[] ParseGIDs(string encoding, string compression, string data, int width, GridLayout.CellLayout layout)
{
// Decoding
byte[] input;
switch (encoding)
{
case "base64": input = Convert.FromBase64String(data); break;
default: throw new NotImplementedException("Encoding: " + (encoding ?? "xml"));
}
// Decompression
byte[] output;
switch (compression)
{
case null: output = input; break;
case "gzip": output = CompressionHelper.DecompressGZip(input); break;
case "zlib": output = CompressionHelper.DecompressZlib(input); break;
default: throw new NotImplementedException("Compression: " + compression);
}
// Parse bytes as uint32 gids
var gids = new uint[output.Length / 4];
Buffer.BlockCopy(output, 0, gids, 0, output.Length);
if (layout == GridLayout.CellLayout.Rectangle)
{
return(ArrayHelper.Reverse(gids, stride: width));
}
else if (layout == GridLayout.CellLayout.Isometric)
{
return(ArrayHelper.Swizzle(gids, stride: width).Reverse().ToArray());
}
else
{
return(gids);
}
}