Class MvtDecoder

java.lang.Object

com.codename1.maps.vector.MvtDecoder

public final class MvtDecoder
extends Object

Decodes a Mapbox Vector Tile (MVT 2.1, application/x-protobuf) into the in-memory VectorTile model using the framework's protobuf reader (ProtoReader).

The geometry command stream is decoded per the MVT spec: integers are either (command | count << 3) headers or zig-zag delta-encoded parameters; MoveTo (1) starts a part, LineTo (2) extends it and ClosePath (7) ends a polygon ring. Coordinates are kept tile-local (0..extent); projection to the screen happens in TileRenderer.

Method Summary

Modifier and Type	Method	Description
static VectorTile	decode(byte[] data)	Decodes raw tile bytes into a VectorTile.

Methods inherited from class Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

decode

public static VectorTile decode(byte[] data)
                         throws IOException

Decodes raw tile bytes into a VectorTile. The input must already be decompressed (the tile sources gunzip transparently).

Throws:

IOException