/
TileDiscardPolicy.js
40 lines (36 loc) · 1.23 KB
/
TileDiscardPolicy.js
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/*global define*/
define([
'../Core/DeveloperError'
], function(
DeveloperError) {
"use strict";
/**
* A policy for discarding tile images according to some criteria. This type describes an
* interface and is not intended to be instantiated directly.
*
* @alias TileDiscardPolicy
* @constructor
*
* @see DiscardMissingTileImagePolicy
* @see NeverTileDiscardPolicy
*/
var TileDiscardPolicy = function(options) {
DeveloperError.throwInstantiationError();
};
/**
* Determines if the discard policy is ready to process images.
* @function
*
* @returns {Boolean} True if the discard policy is ready to process images; otherwise, false.
*/
TileDiscardPolicy.prototype.isReady = DeveloperError.throwInstantiationError;
/**
* Given a tile image, decide whether to discard that image.
* @function
*
* @param {Image|Promise} image An image, or a promise that will resolve to an image.
* @returns {Boolean} A promise that will resolve to true if the tile should be discarded.
*/
TileDiscardPolicy.prototype.shouldDiscardImage = DeveloperError.throwInstantiationError;
return TileDiscardPolicy;
});