goog.provide('ol.source.ImageStatic');
goog.require('goog.events');
goog.require('ol.Image');
goog.require('ol.extent');
goog.require('ol.proj');
goog.require('ol.source.Image');
/**
* @classdesc
* A layer source for displaying a single, static image.
*
* @constructor
* @extends {ol.source.Image}
* @param {olx.source.ImageStaticOptions} options Options.
* @api stable
*/
ol.source.ImageStatic = function(options) {
var attributions = goog.isDef(options.attributions) ?
options.attributions : null;
var imageExtent = options.imageExtent;
var resolution, resolutions;
if (goog.isDef(options.imageSize)) {
resolution = ol.extent.getHeight(imageExtent) / options.imageSize[1];
resolutions = [resolution];
}
var crossOrigin = goog.isDef(options.crossOrigin) ?
options.crossOrigin : null;
var imageLoadFunction = goog.isDef(options.imageLoadFunction) ?
options.imageLoadFunction : ol.source.Image.defaultImageLoadFunction;
goog.base(this, {
attributions: attributions,
logo: options.logo,
projection: ol.proj.get(options.projection),
resolutions: resolutions
});
/**
* @private
* @type {ol.Image}
*/
this.image_ = new ol.Image(imageExtent, resolution, 1, attributions,
options.url, crossOrigin, imageLoadFunction);
};
goog.inherits(ol.source.ImageStatic, ol.source.Image);
/**
* @inheritDoc
*/
ol.source.ImageStatic.prototype.getImage =
function(extent, resolution, pixelRatio, projection) {
if (ol.extent.intersects(extent, this.image_.getExtent())) {
return this.image_;
}
return null;
};