Added getCompressedTextureName method

src/renderer/webgl/WebGLRenderer.js

@@ -1041,6 +1041,27 @@ var WebGLRenderer = new Class({
         };
     },
 
+    /**
+     * TODO
+     *
+     * @method Phaser.Renderer.WebGL.WebGLRenderer#getCompressedTextureName
+     * @since 3.60.0
+     *
+     * @param {string} baseFormat - The Base Format to check.
+     * @param {GLenum} [format] - An optional GLenum format to check within the base format.
+     *
+     * @return {string}
+     */
+    getCompressedTextureName: function (baseFormat, format)
+    {
+        var supportedFormats = this.compression[baseFormat.toUpperCase()];
+
+        if (format in supportedFormats)
+        {
+            return supportedFormats[format];
+        }
+    },
+
     /**
      * Checks if the given compressed texture format is supported, or not.
      *