Added jsdocs.

Author: photonstorm

src/display/canvas/CanvasInterpolation.js

@@ -1,7 +1,19 @@
+/**
+ * @module Phaser.Display.Canvas.CanvasInterpolation
+ * @since 3.0.0
+ */
 var CanvasInterpolation = {
 
-    //  Sets the CSS image-rendering property on the given canvas to be 'crisp' (aka 'optimize contrast' on webkit).
-    //  Note that if this doesn't given the desired result then see the setSmoothingEnabled.
+    /**
+     * Sets the CSS image-rendering property on the given canvas to be 'crisp' (aka 'optimize contrast' on webkit).
+     *
+     * @function setCrisp
+     * @since 3.0.0
+     * 
+     * @param {HTMLCanvasElement} canvas - The canvas object to have the style set on.
+     * 
+     * @return {HTMLCanvasElement} The canvas.
+     */
     setCrisp: function (canvas)
     {
         var types = [ 'optimizeSpeed', 'crisp-edges', '-moz-crisp-edges', '-webkit-optimize-contrast', 'optimize-contrast', 'pixelated' ];
@@ -16,8 +28,16 @@ var CanvasInterpolation = {
         return canvas;
     },
 
-    //  Sets the CSS image-rendering property on the given canvas to be 'bicubic' (aka 'auto').
-    //  Note that if this doesn't given the desired result then see the CanvasUtils.setSmoothingEnabled method.
+    /**
+     * Sets the CSS image-rendering property on the given canvas to be 'bicubic' (aka 'auto').
+     *
+     * @function setBicubic
+     * @since 3.0.0
+     * 
+     * @param {HTMLCanvasElement} canvas - The canvas object to have the style set on.
+     * 
+     * @return {HTMLCanvasElement} The canvas.
+     */
     setBicubic: function (canvas)
     {
         canvas.style['image-rendering'] = 'auto';

src/display/canvas/TouchAction.js

@@ -1,6 +1,14 @@
 /**
-* Sets the touch-action property on the canvas style. Can be used to disable default browser touch actions.
-*/
+ * Sets the touch-action property on the canvas style. Can be used to disable default browser touch actions.
+ *
+ * @function Phaser.Display.Canvas.TouchAction
+ * @since 3.0.0
+ *
+ * @param {HTMLCanvasElement} canvas - The canvas element to have the style applied to.
+ * @param {string} [value='none'] - The touch action value to set on the canvas. Set to `none` to disable touch actions.
+ *
+ * @return {HTMLCanvasElement} The canvas element.
+ */
 var TouchAction = function (canvas, value)
 {
     if (value === undefined) { value = 'none'; }

src/display/canvas/UserSelect.js

@@ -1,6 +1,14 @@
 /**
-* Sets the user-select property on the canvas style. Can be used to disable default browser selection actions.
-*/
+ * Sets the user-select property on the canvas style. Can be used to disable default browser selection actions.
+ *
+ * @function Phaser.Display.Canvas.UserSelect
+ * @since 3.0.0
+ *
+ * @param {HTMLCanvasElement} canvas - The canvas element to have the style applied to.
+ * @param {string} [value='none'] - The touch callout value to set on the canvas. Set to `none` to disable touch callouts.
+ *
+ * @return {HTMLCanvasElement} The canvas element.
+ */
 var UserSelect = function (canvas, value)
 {
     if (value === undefined) { value = 'none'; }