check if global object exists

README.md

@@ -1,6 +1,6 @@
 canvas-text-wrapper
 =================
-v0.6.6
+##v0.6.7
 
 
 ## Syntax

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "canvas-text-wrapper",
-  "version": "0.6.6",
+  "version": "0.6.7",
   "ignore": [
     "**/.*",
     "**/*.log",

canvas-text-wrapper.js

@@ -1,6 +1,6 @@
 /*! canvas-text-wrapper
  *  https://github.com/namniak/canvas-text-wrapper
- *  Version:  0.6.6
+ *  Version:  0.6.7
  *  MIT License (http://www.opensource.org/licenses/mit-license.html)
  */
 
@@ -37,7 +37,9 @@
     context.textBaseline = 'bottom';
 
     var scale = 1;
-    if (opts.renderHDPI && global.devicePixelRatio) {
+    var devicePixelRatio = (typeof global !== 'undefined') ? global.devicePixelRatio : root.devicePixelRatio;
+
+    if (opts.renderHDPI && devicePixelRatio > 1) {
       var tempCtx = {};
 
       // store context settings in a temp object before scaling otherwise they will be lost
@@ -47,7 +49,7 @@
 
       var canvasWidth = canvas.width;
       var canvasHeight = canvas.height;
-      scale = global.devicePixelRatio;
+      scale = devicePixelRatio;
 
       canvas.width = canvasWidth * scale;
       canvas.height = canvasHeight * scale;

package.json

@@ -1,7 +1,7 @@
 {
   "name": "canvas-text-wrapper",
   "description": "Split canvas text into lines on specified rule with optional alignment, padding, and more. Supports HDPI screens.",
-  "version": "0.6.6",
+  "version": "0.6.7",
   "license": "MIT",
   "main": "canvas-text-wrapper.min.js",
   "keywords": [
@@ -25,6 +25,7 @@
     "test": "beefy test/test.js --live --open"
   },
   "devDependencies": {
+    "grunt": "^0.4.5",
     "grunt-contrib-uglify": "^0.9.1",
     "uglify-save-license": "^0.4.1"
   }