public void Read(byte[] data)
{
if (data == null)
{
throw new Exception("Tile data cannot be null");
}
if (data.Length < 1)
{
throw new Exception("Tile data cannot be empty");
}
if (data[0] == 0x1f && data[1] == 0x8b)
{
return;
}
OnlineMapsPBFReader reader = new OnlineMapsPBFReader(data);
while (reader.NextByte())
{
if (reader.tag != (int)TileType.Layers)
{
reader.Skip();
continue;
}
string name = null;
byte[] layerMessage = reader.View();
OnlineMapsPBFReader layerView = new OnlineMapsPBFReader(layerMessage);
while (layerView.NextByte())
{
if (layerView.tag == (int)LayerType.Name)
{
name = layerView.GetString((ulong)layerView.Varint());
}
else
{
layerView.Skip();
}
}
layers.Add(name, layerMessage);
}
}
public static Feature GetFeature(Layer layer, int index)
{
byte[] data = layer.featuresData[index];
OnlineMapsPBFReader reader = new OnlineMapsPBFReader(data);
Feature feature = new Feature(layer);
while (reader.NextByte())
{
switch ((FeatureType)reader.tag)
{
case FeatureType.Id:
feature.id = (ulong)reader.Varint();
break;
case FeatureType.Tags:
List <int> tags = reader.GetPackedUnit32().Select(t => (int)t).ToList();
feature.tags = tags;
break;
case FeatureType.Type:
int geomType = (int)reader.Varint();
feature.geometryType = (GeomType)geomType;
break;
case FeatureType.Geometry:
feature.geometryCommands = reader.GetPackedUnit32();
break;
default:
reader.Skip();
break;
}
}
return(feature);
}
private static Layer GetLayer(byte[] data)
{
Layer layer = new Layer();
OnlineMapsPBFReader layerReader = new OnlineMapsPBFReader(data);
while (layerReader.NextByte())
{
switch ((LayerType)layerReader.tag)
{
case LayerType.Version:
layer.version = (ulong)layerReader.Varint();
break;
case LayerType.Name:
layer.name = layerReader.GetString((ulong)layerReader.Varint());
break;
case LayerType.Extent:
layer.extent = (ulong)layerReader.Varint();
break;
case LayerType.Keys:
byte[] keyBuffer = layerReader.View();
string key = Encoding.UTF8.GetString(keyBuffer, 0, keyBuffer.Length);
layer.keys.Add(key);
break;
case LayerType.Values:
byte[] valueBuffer = layerReader.View();
OnlineMapsPBFReader valReader = new OnlineMapsPBFReader(valueBuffer);
while (valReader.NextByte())
{
switch ((ValueType)valReader.tag)
{
case ValueType.String:
byte[] stringBuffer = valReader.View();
string value = Encoding.UTF8.GetString(stringBuffer, 0, stringBuffer.Length);
layer.values.Add(value);
break;
case ValueType.Float:
layer.values.Add(valReader.GetFloat());
break;
case ValueType.Double:
layer.values.Add(valReader.GetDouble());
break;
case ValueType.Int:
layer.values.Add(valReader.Varint());
break;
case ValueType.UInt:
case ValueType.SInt:
layer.values.Add(valReader.Varint());
break;
case ValueType.Bool:
layer.values.Add(valReader.Varint() == 1);
break;
}
}
break;
case LayerType.Features:
layer.featuresData.Add(layerReader.View());
break;
default:
layerReader.Skip();
break;
}
}
return(layer);
}
