livecodingspace-app/support/client/lib/vwf/model/cesium/Scene/NeverTileDiscardPolicy.js

/*global define*/
define([], function() {
    "use strict";

    /**
     * A {@link TileDiscardPolicy} specifying that tile images should never be discard.
     *
     * @alias NeverTileDiscardPolicy
     * @constructor
     *
     * @see DiscardMissingTileImagePolicy
     */
    var NeverTileDiscardPolicy = function(options) {
    };

    /**
     * Determines if the discard policy is ready to process images.
     * @returns True if the discard policy is ready to process images; otherwise, false.
     */
    NeverTileDiscardPolicy.prototype.isReady = function() {
        return true;
    };

    /**
     * Given a tile image, decide whether to discard that image.
     *
     * @param {Image|Promise} image An image, or a promise that will resolve to an image.
     * @returns A promise that will resolve to true if the tile should be discarded.
     */
    NeverTileDiscardPolicy.prototype.shouldDiscardImage = function(image) {
        return false;
    };

    return NeverTileDiscardPolicy;
});