e128bab625
getTile and the tileUrlFunc are functions of the source, so they do need to be passed the tile grid. The tile source knows its tile grid, and can get the projection's tile grid if it doesn't have a tile grid.
118 lines
2.9 KiB
JavaScript
118 lines
2.9 KiB
JavaScript
goog.provide('ol.source.ImageTileSource');
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goog.provide('ol.source.ImageTileSourceOptions');
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goog.require('ol.Attribution');
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goog.require('ol.Extent');
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goog.require('ol.ImageTile');
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goog.require('ol.Projection');
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goog.require('ol.Tile');
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goog.require('ol.TileCache');
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goog.require('ol.TileCoord');
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goog.require('ol.TileState');
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goog.require('ol.TileUrlFunction');
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goog.require('ol.TileUrlFunctionType');
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goog.require('ol.source.TileSource');
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goog.require('ol.tilegrid.TileGrid');
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/**
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* @typedef {{attributions: (Array.<ol.Attribution>|undefined),
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* crossOrigin: (null|string|undefined),
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* extent: (ol.Extent|undefined),
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* opaque: (boolean|undefined),
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* projection: ol.ProjectionLike,
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* tileGrid: (ol.tilegrid.TileGrid|undefined),
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* tileUrlFunction: (ol.TileUrlFunctionType|undefined)}}
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*/
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ol.source.ImageTileSourceOptions;
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/**
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* @constructor
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* @extends {ol.source.TileSource}
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* @param {ol.source.ImageTileSourceOptions} options Options.
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*/
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ol.source.ImageTileSource = function(options) {
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goog.base(this, {
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attributions: options.attributions,
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extent: options.extent,
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opaque: options.opaque,
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projection: options.projection,
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tileGrid: options.tileGrid
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});
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/**
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* @protected
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* @type {ol.TileUrlFunctionType}
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*/
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this.tileUrlFunction = goog.isDef(options.tileUrlFunction) ?
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options.tileUrlFunction :
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ol.TileUrlFunction.nullTileUrlFunction;
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/**
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* @private
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* @type {?string}
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*/
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this.crossOrigin_ =
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goog.isDef(options.crossOrigin) ? options.crossOrigin : null;
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/**
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* @private
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* @type {ol.TileCache}
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*/
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this.tileCache_ = new ol.TileCache();
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};
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goog.inherits(ol.source.ImageTileSource, ol.source.TileSource);
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/**
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* @inheritDoc
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*/
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ol.source.ImageTileSource.prototype.canExpireCache = function() {
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return this.tileCache_.canExpireCache();
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};
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/**
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* @inheritDoc
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*/
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ol.source.ImageTileSource.prototype.expireCache = function(usedTiles) {
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this.tileCache_.expireCache(usedTiles);
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};
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/**
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* @inheritDoc
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*/
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ol.source.ImageTileSource.prototype.getTile = function(z, x, y, projection) {
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var tileCoordKey = ol.TileCoord.getKeyZXY(z, x, y);
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if (this.tileCache_.containsKey(tileCoordKey)) {
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return /** @type {!ol.Tile} */ (this.tileCache_.get(tileCoordKey));
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} else {
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goog.asserts.assert(projection);
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var tileCoord = new ol.TileCoord(z, x, y);
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var tileUrl = this.tileUrlFunction(tileCoord, projection);
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var tile = new ol.ImageTile(
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tileCoord,
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goog.isDef(tileUrl) ? ol.TileState.IDLE : ol.TileState.EMPTY,
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goog.isDef(tileUrl) ? tileUrl : '',
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this.crossOrigin_);
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this.tileCache_.set(tileCoordKey, tile);
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return tile;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.source.ImageTileSource.prototype.useTile = function(z, x, y) {
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var tileCoordKey = ol.TileCoord.getKeyZXY(z, x, y);
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if (this.tileCache_.containsKey(tileCoordKey)) {
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this.tileCache_.get(tileCoordKey);
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}
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};
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