static void WriteStartByte(ByteRange byteRange)
{
string startByte = byteRange.ToString().PadRight(ByteTiles.HeaderByteRangeLength, ' ');
byte[] byteArray = Encoding.UTF8.GetBytes(startByte);
FileStream.Write(byteArray, 0, byteArray.Length);
}
public byte[] GetData(ByteRange byteRange)
{
byte[] byteArray = new byte[byteRange.Length];
using FileStream fileStream = new(InputFile, FileMode.Open, FileAccess.Read);
fileStream.Seek(byteRange.Position, SeekOrigin.Begin);
fileStream.Read(byteArray, 0, byteRange.Length);
return(byteArray);
}
public Header(string json)
{
var keyValuePairs = JsonSerializer.Deserialize <Dictionary <string, string> >(json);
Version = keyValuePairs["version"];
MetaData = new ByteRange(keyValuePairs["metadata"]);
TilesDictionary = new ByteRange(keyValuePairs["tiles_dictionary"]);
if (keyValuePairs.ContainsKey("grids_dictionary"))
{
GridsDictionary = new ByteRange(keyValuePairs["grids_dictionary"]);
}
if (keyValuePairs.ContainsKey("grid_data_dictionary"))
{
GridDataDictionary = new ByteRange(keyValuePairs["grid_data_dictionary"]);
}
}
/// <summary>
///
/// </summary>
/// <param name="input">.mbtiles file</param>
/// <param name="output">.bytetiles file</param>
/// <param name="decompress">GZip decompress (for .pfb content)</param>
public static void ParseMBTiles(string input, string output, bool decompress = false)
{
MBTilesReader mBTilesReader = new(input);
Position = 0;
OutputFile = output;
File.Delete(OutputFile);
byteRangeMetadata = new Header();
FileStream = new FileStream(OutputFile, FileMode.Append, FileAccess.Write);
WriteTableTiles(mBTilesReader, decompress);
WriteTableMetadata(mBTilesReader);
ByteRange byteRange = WriteByteRangeMetadata();
WriteStartByte(byteRange);
FileStream.Close();
}
static void WriteTableTiles(MBTilesReader mBTilesReader, bool decompress)
{
var tiles = mBTilesReader.GetTiles();
Position = 0;
int counter = 0;
string percentageDone = string.Empty;
Dictionary <string, string> dictionaryMap = new();
int total = tiles.Count;
object sync = new();
Parallel.ForEach(tiles,
tilesRow =>
{
byte[] bytes = tilesRow.Tile_data;
if (decompress)
{
bytes = Decompress(bytes);
}
lock (sync)
{
ByteRange byteRange = Write(bytes);
string tileKey = tilesRow.TileKey().ToString();
dictionaryMap.Add(tileKey, byteRange.ToString());
counter++;
double percentage = counter * 100 / total;
string percentageDoneAux = percentage.ToString("#.#");
if (!percentageDone.Equals(percentageDoneAux))
{
percentageDone = percentageDoneAux;
Console.WriteLine("Completed " + percentageDone + "%");
}
}
});
string dictionary = JsonSerializer.Serialize(dictionaryMap);
byteRangeMetadata.TilesDictionary = Write(dictionary);
}