goog.provide('ol.ImageBase');
goog.provide('ol.ImageState');
goog.require('goog.asserts');
goog.require('goog.events.EventTarget');
goog.require('goog.events.EventType');
goog.require('ol.Attribution');
goog.require('ol.Extent');
/**
* @enum {number}
*/
ol.ImageState = {
IDLE: 0,
LOADING: 1,
LOADED: 2,
ERROR: 3
};
/**
* @constructor
* @extends {goog.events.EventTarget}
* @param {ol.Extent} extent Extent.
* @param {number|undefined} resolution Resolution.
* @param {number} pixelRatio Pixel ratio.
* @param {ol.ImageState} state State.
* @param {Array.<ol.Attribution>} attributions Attributions.
*/
ol.ImageBase = function(extent, resolution, pixelRatio, state, attributions) {
goog.base(this);
/**
* @private
* @type {Array.<ol.Attribution>}
*/
this.attributions_ = attributions;
/**
* @protected
* @type {ol.Extent}
*/
this.extent = extent;
/**
* @private
* @type {number}
*/
this.pixelRatio_ = pixelRatio;
/**
* @protected
* @type {number|undefined}
*/
this.resolution = resolution;
/**
* @protected
* @type {ol.ImageState}
*/
this.state = state;
};
goog.inherits(ol.ImageBase, goog.events.EventTarget);
/**
* @protected
*/
ol.ImageBase.prototype.changed = function() {
this.dispatchEvent(goog.events.EventType.CHANGE);
};
/**
* @return {Array.<ol.Attribution>} Attributions.
*/
ol.ImageBase.prototype.getAttributions = function() {
return this.attributions_;
};
/**
* @return {ol.Extent} Extent.
*/
ol.ImageBase.prototype.getExtent = function() {
return this.extent;
};
/**
* @param {Object=} opt_context Object.
* @return {HTMLCanvasElement|Image|HTMLVideoElement} Image.
*/
ol.ImageBase.prototype.getImage = goog.abstractMethod;
/**
* @return {number} PixelRatio.
*/
ol.ImageBase.prototype.getPixelRatio = function() {
return this.pixelRatio_;
};
/**
* @return {number} Resolution.
*/
ol.ImageBase.prototype.getResolution = function() {
goog.asserts.assert(goog.isDef(this.resolution), 'resolution not yet set');
return this.resolution;
};
/**
* @return {ol.ImageState} State.
*/
ol.ImageBase.prototype.getState = function() {
return this.state;
};
/**
* Load not yet loaded URI.
*/
ol.ImageBase.prototype.load = goog.abstractMethod;