Base for tile layers, renderer-specific tile layer types

src/ol/layer/WebGLTile.js

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+/**
+ * @module ol/layer/WebGLTile
+ */
+import BaseTileLayer from './BaseTile.js';
+
+
+/**
+ * @typedef {import("./BaseTile.js").Options} Options
+ */
+
+
+/**
+ * @classdesc
+ * For layer sources that provide pre-rendered, tiled images in grids that are
+ * organized by zoom levels for specific resolutions.
+ * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
+ * property on the layer object; for example, setting `title: 'My Title'` in the
+ * options means that `title` is observable, and has get/set accessors.
+ *
+ * @api
+ */
+class WebGLTileLayer extends BaseTileLayer {
+
+  /**
+   * @param {Options=} opt_options Tile layer options.
+   */
+  constructor(opt_options) {
+    super(opt_options);
+  }
+
+  /**
+   * Create a renderer for this layer.
+   * @return {import("../renderer/Layer.js").default} A layer renderer.
+   * @protected
+   */
+  createRenderer() {
+    // TODO: rework WebGL renderers to share context
+    return null;
+  }
+
+}
+
+export default WebGLTileLayer;