Rename #getImageElement to #getImage

This adds consistency between ol.Image and ol.ImageTile. Now both have
an exportable getImage method.

src/ol/image.js

@@ -66,8 +66,9 @@ goog.inherits(ol.Image, ol.ImageBase);
 /**
  * @param {Object=} opt_context Object.
  * @return {HTMLCanvasElement|Image|HTMLVideoElement} Image.
+ * @api
  */
-ol.Image.prototype.getImageElement = function(opt_context) {
+ol.Image.prototype.getImage = function(opt_context) {
   if (goog.isDef(opt_context)) {
     var image;
     var key = goog.getUid(opt_context);

src/ol/imagebase.js

@@ -95,7 +95,7 @@ ol.ImageBase.prototype.getExtent = function() {
  * @param {Object=} opt_context Object.
  * @return {HTMLCanvasElement|Image|HTMLVideoElement} Image.
  */
-ol.ImageBase.prototype.getImageElement = goog.abstractMethod;
+ol.ImageBase.prototype.getImage = goog.abstractMethod;
 
 
 /**

src/ol/imagecanvas.js

@@ -33,6 +33,6 @@ goog.inherits(ol.ImageCanvas, ol.ImageBase);
 /**
  * @inheritDoc
  */
-ol.ImageCanvas.prototype.getImageElement = function(opt_context) {
+ol.ImageCanvas.prototype.getImage = function(opt_context) {
   return this.canvas_;
 };

src/ol/renderer/canvas/canvasimagelayerrenderer.js

@@ -69,7 +69,7 @@ ol.renderer.canvas.ImageLayer.prototype.forEachFeatureAtPixel =
  */
 ol.renderer.canvas.ImageLayer.prototype.getImage = function() {
   return goog.isNull(this.image_) ?
-      null : this.image_.getImageElement();
+      null : this.image_.getImage();
 };
 
 

src/ol/renderer/dom/domimagelayerrenderer.js

@@ -129,7 +129,7 @@ ol.renderer.dom.ImageLayer.prototype.prepareFrame =
         (imageExtent[0] - viewCenter[0]) / imageResolution,
         (viewCenter[1] - imageExtent[3]) / imageResolution);
     if (image != this.image_) {
-      var imageElement = image.getImageElement(this);
+      var imageElement = image.getImage(this);
       // Bootstrap sets the style max-width: 100% for all images, which breaks
       // prevents the image from being displayed in FireFox.  Workaround by
       // overriding the max-width style.

src/ol/renderer/webgl/webglimagelayerrenderer.js

@@ -48,7 +48,7 @@ ol.renderer.webgl.ImageLayer.prototype.createTexture_ = function(image) {
   // http://www.khronos.org/webgl/wiki/WebGL_and_OpenGL_Differences#Non-Power_of_Two_Texture_Support
   // http://learningwebgl.com/blog/?p=2101
 
-  var imageElement = image.getImageElement();
+  var imageElement = image.getImage();
   var gl = this.getWebGLMapRenderer().getGL();
 
   var texture = gl.createTexture();