Add ol.BrowserFeature.HAS_CANVAS

src/ol/browserfeature.exports

@@ -1,6 +1,7 @@
 @exportSymbol ol.BrowserFeature
 @exportProperty ol.BrowserFeature.DEVICE_PIXEL_RATIO
-@exportProperty ol.BrowserFeature.HAS_TOUCH
+@exportProperty ol.BrowserFeature.HAS_CANVAS
 @exportProperty ol.BrowserFeature.HAS_DEVICE_ORIENTATION
 @exportProperty ol.BrowserFeature.HAS_GEOLOCATION
+@exportProperty ol.BrowserFeature.HAS_TOUCH
 @exportProperty ol.BrowserFeature.HAS_WEBGL

src/ol/browserfeature.js

@@ -21,6 +21,30 @@ ol.ASSUME_TOUCH = false;
 ol.BrowserFeature.DEVICE_PIXEL_RATIO = goog.global.devicePixelRatio || 1;
 
 
+/**
+ * True if browser supports Canvas.
+ * @const
+ * @type {boolean}
+ * @todo stability experimental
+ */
+ol.BrowserFeature.HAS_CANVAS = (
+    /**
+     * @return {boolean} Canvas supported.
+     */
+    function() {
+      if (!('HTMLCanvasElement' in goog.global)) {
+        return false;
+      }
+      try {
+        var canvas = /** @type {HTMLCanvasElement} */
+            (goog.dom.createElement(goog.dom.TagName.CANVAS));
+        return !goog.isNull(canvas.getContext('2d'));
+      } catch (e) {
+        return false;
+      }
+    })();
+
+
 /**
  * Indicates if DeviceOrientation is supported in the user's browser.
  * @const

src/ol/canvas/canvas.js

@@ -1,27 +0,0 @@
-goog.provide('ol.canvas');
-
-goog.require('goog.dom');
-goog.require('goog.dom.TagName');
-
-
-/**
- * Is supported.
- * @const
- * @type {boolean}
- */
-ol.canvas.SUPPORTED = (
-    /**
-     * @return {boolean} Canvas supported.
-     */
-    function() {
-      if (!('HTMLCanvasElement' in goog.global)) {
-        return false;
-      }
-      try {
-        var canvas = /** @type {HTMLCanvasElement} */
-            (goog.dom.createElement(goog.dom.TagName.CANVAS));
-        return !goog.isNull(canvas.getContext('2d'));
-      } catch (e) {
-        return false;
-      }
-    })();

src/ol/renderer/canvas/canvasrenderer.js

@@ -1,6 +1,6 @@
 goog.provide('ol.renderer.canvas');
 
-goog.require('ol.canvas');
+goog.require('ol.BrowserFeature');
 
 
 /**
@@ -8,4 +8,4 @@ goog.require('ol.canvas');
  * @const
  * @type {boolean}
  */
-ol.renderer.canvas.SUPPORTED = ol.canvas.SUPPORTED;
+ol.renderer.canvas.SUPPORTED = ol.BrowserFeature.HAS_CANVAS;