phaser/src/tilemaps/parsers/tiled/ParseTileLayers.js

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/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
var Base64Decode = require('./Base64Decode');
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var GetFastValue = require('../../../utils/object/GetFastValue');
var LayerData = require('../../mapdata/LayerData');
var ParseGID = require('./ParseGID');
var Tile = require('../../Tile');
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/**
* [description]
*
* @function Phaser.Tilemaps.Parsers.Tiled.ParseTileLayers
* @since 3.0.0
*
* @param {object} json - [description]
* @param {boolean} insertNull - [description]
*
* @return {array} [description]
*/
var ParseTileLayers = function (json, insertNull)
{
var tileLayers = [];
for (var i = 0; i < json.layers.length; i++)
{
if (json.layers[i].type !== 'tilelayer')
{
continue;
}
var curl = json.layers[i];
// Base64 decode data if necessary. NOTE: uncompressed base64 only.
if (curl.compression)
{
console.warn(
'TilemapParser.parseTiledJSON - Layer compression is unsupported, skipping layer \''
+ curl.name + '\''
);
continue;
}
else if (curl.encoding && curl.encoding === 'base64')
{
curl.data = Base64Decode(curl.data);
delete curl.encoding; // Allow the same map to be parsed multiple times
}
var layerData = new LayerData({
name: curl.name,
x: GetFastValue(curl, 'offsetx', 0) + curl.x,
y: GetFastValue(curl, 'offsety', 0) + curl.y,
width: curl.width,
height: curl.height,
tileWidth: json.tilewidth,
tileHeight: json.tileheight,
alpha: curl.opacity,
visible: curl.visible,
properties: GetFastValue(curl, 'properties', {})
});
var x = 0;
var row = [];
var output = [];
// Loop through the data field in the JSON.
// This is an array containing the tile indexes, one after the other. -1 = no tile,
// everything else = the tile index (starting at 1 for Tiled, 0 for CSV) If the map
// contains multiple tilesets then the indexes are relative to that which the set starts
// from. Need to set which tileset in the cache = which tileset in the JSON, if you do this
// manually it means you can use the same map data but a new tileset.
for (var t = 0, len = curl.data.length; t < len; t++)
{
var gidInfo = ParseGID(curl.data[t]);
// index, x, y, width, height
if (gidInfo.gid > 0)
{
var tile = new Tile(layerData, gidInfo.gid, x, output.length, json.tilewidth,
json.tileheight);
// Turning Tiled's FlippedHorizontal, FlippedVertical and FlippedAntiDiagonal
// propeties into flipX, flipY and rotation
tile.rotation = gidInfo.rotation;
tile.flipX = gidInfo.flipped;
row.push(tile);
}
else
{
var blankTile = insertNull
? null
: new Tile(layerData, -1, x, output.length, json.tilewidth, json.tileheight);
row.push(blankTile);
}
x++;
if (x === curl.width)
{
output.push(row);
x = 0;
row = [];
}
}
layerData.data = output;
tileLayers.push(layerData);
}
return tileLayers;
};
module.exports = ParseTileLayers;