-
Notifications
You must be signed in to change notification settings - Fork 2.2k
/
tile.js
206 lines (173 loc) · 6.68 KB
/
tile.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
'use strict';
var util = require('../util/util');
var Bucket = require('../data/bucket');
var FeatureIndex = require('../data/feature_index');
var vt = require('vector-tile');
var Protobuf = require('pbf');
var GeoJSONFeature = require('../util/vectortile_to_geojson');
var featureFilter = require('feature-filter');
var CollisionTile = require('../symbol/collision_tile');
var CollisionBoxArray = require('../symbol/collision_box');
var SymbolInstancesArray = require('../symbol/symbol_instances');
var SymbolQuadsArray = require('../symbol/symbol_quads');
module.exports = Tile;
/**
* A tile object is the combination of a Coordinate, which defines
* its place, as well as a unique ID and data tracking for its content
*
* @param {Coordinate} coord
* @param {number} size
* @private
*/
function Tile(coord, size, sourceMaxZoom) {
this.coord = coord;
this.uid = util.uniqueId();
this.uses = 0;
this.tileSize = size;
this.sourceMaxZoom = sourceMaxZoom;
this.buckets = {};
// `this.state` must be one of
//
// - `loading`: Tile data is in the process of loading.
// - `loaded`: Tile data has been loaded. Tile can be rendered.
// - `reloading`: Tile data has been loaded and is being updated. Tile can be rendered.
// - `unloaded`: Tile data has been deleted.
// - `errored`: Tile data was not loaded because of an error.
this.state = 'loading';
}
Tile.prototype = {
/**
* Given a data object with a 'buffers' property, load it into
* this tile's elementGroups and buffers properties and set loaded
* to true. If the data is null, like in the case of an empty
* GeoJSON tile, no-op but still set loaded to true.
* @param {Object} data
* @returns {undefined}
* @private
*/
loadVectorData: function(data, painter) {
if (this.hasData()) {
this.unloadVectorData(painter);
}
this.state = 'loaded';
// empty GeoJSON tile
if (!data) return;
// If we are redoing placement for the same tile, we will not recieve
// a new "rawTileData" object. If we are loading a new tile, we will
// recieve a new "rawTileData" object.
if (data.rawTileData) {
this.rawTileData = data.rawTileData;
}
this.collisionBoxArray = new CollisionBoxArray(data.collisionBoxArray);
this.collisionTile = new CollisionTile(data.collisionTile, this.collisionBoxArray);
this.symbolInstancesArray = new SymbolInstancesArray(data.symbolInstancesArray);
this.symbolQuadsArray = new SymbolQuadsArray(data.symbolQuadsArray);
this.featureIndex = new FeatureIndex(data.featureIndex, this.rawTileData, this.collisionTile);
this.buckets = unserializeBuckets(data.buckets, painter.style);
},
/**
* Replace this tile's symbol buckets with fresh data.
* @param {Object} data
* @param {Style} style
* @returns {undefined}
* @private
*/
reloadSymbolData: function(data, style) {
if (this.state === 'unloaded') return;
this.collisionTile = new CollisionTile(data.collisionTile, this.collisionBoxArray);
this.featureIndex.setCollisionTile(this.collisionTile);
for (var id in this.buckets) {
var bucket = this.buckets[id];
if (bucket.type === 'symbol') {
bucket.destroy();
delete this.buckets[id];
}
}
// Add new symbol buckets
util.extend(this.buckets, unserializeBuckets(data.buckets, style));
},
/**
* Release any data or WebGL resources referenced by this tile.
* @returns {undefined}
* @private
*/
unloadVectorData: function() {
for (var id in this.buckets) {
this.buckets[id].destroy();
}
this.collisionBoxArray = null;
this.symbolQuadsArray = null;
this.symbolInstancesArray = null;
this.collisionTile = null;
this.featureIndex = null;
this.buckets = null;
this.state = 'unloaded';
},
redoPlacement: function(source) {
if (this.state !== 'loaded' || this.state === 'reloading') {
this.redoWhenDone = true;
return;
}
this.state = 'reloading';
source.dispatcher.send('redo placement', {
uid: this.uid,
source: source.id,
angle: source.map.transform.angle,
pitch: source.map.transform.pitch,
showCollisionBoxes: source.map.showCollisionBoxes
}, done.bind(this), this.workerID);
function done(_, data) {
this.reloadSymbolData(data, source.map.style);
source.fire('data', {tile: this, dataType: 'tile'});
// HACK this is nescessary to fix https://github.com/mapbox/mapbox-gl-js/issues/2986
if (source.map) source.map.painter.tileExtentVAO.vao = null;
this.state = 'loaded';
if (this.redoWhenDone) {
this.redoPlacement(source);
this.redoWhenDone = false;
}
}
},
getBucket: function(layer) {
return this.buckets && this.buckets[layer.ref || layer.id];
},
querySourceFeatures: function(result, params) {
if (!this.rawTileData) return;
if (!this.vtLayers) {
this.vtLayers = new vt.VectorTile(new Protobuf(this.rawTileData)).layers;
}
var layer = this.vtLayers._geojsonTileLayer || this.vtLayers[params.sourceLayer];
if (!layer) return;
var filter = featureFilter(params.filter);
var coord = { z: this.coord.z, x: this.coord.x, y: this.coord.y };
for (var i = 0; i < layer.length; i++) {
var feature = layer.feature(i);
if (filter(feature)) {
var geojsonFeature = new GeoJSONFeature(feature, this.coord.z, this.coord.x, this.coord.y);
geojsonFeature.tile = coord;
result.push(geojsonFeature);
}
}
},
hasData: function() {
return this.state === 'loaded' || this.state === 'reloading';
}
};
function unserializeBuckets(input, style) {
// Guard against the case where the map's style has been set to null while
// this bucket has been parsing.
if (!style) return;
var output = {};
for (var i = 0; i < input.length; i++) {
var layer = style.getLayer(input[i].layerId);
if (!layer) continue;
var bucket = Bucket.create(util.extend({
layer: layer,
childLayers: input[i].childLayerIds
.map(style.getLayer.bind(style))
.filter(function(layer) { return layer; })
}, input[i]));
output[bucket.id] = bucket;
}
return output;
}