From 5d298ff3cc493021e9682ce8765ac4c99c9dcef2 Mon Sep 17 00:00:00 2001
From: Sneezry <lizhe@lizhe.org>
Date: Sat, 2 May 2015 02:47:36 +0800
Subject: [PATCH] scan qr code with devicePixelRatio for retina displays

---
 javascript/background.js | 7 -------
 javascript/content.js    | 4 ++++
 manifest.json            | 2 +-
 3 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/javascript/background.js b/javascript/background.js
index 4dae636..5a4d23c 100644
--- a/javascript/background.js
+++ b/javascript/background.js
@@ -20,13 +20,6 @@ function getQr(tab, left, top, width, height, windowWidth) {
         var qr = new Image();
         qr.src = dataUrl;
         qr.onload = function () {
-            if (windowWidth * 2 === qr.width) {
-                //Retina Display
-                left *= 2;
-                top *= 2;
-                width *= 2;
-                height *= 2;
-            }
             this.tab = tab;
             var captureCanvas = document.getElementById('__ga_captureCanvas__');
             if (!captureCanvas) {
diff --git a/javascript/content.js b/javascript/content.js
index 23a75bd..7407931 100644
--- a/javascript/content.js
+++ b/javascript/content.js
@@ -64,6 +64,10 @@ function grayLayoutUp(event) {
     var captureBoxTop = Math.min(this.captureBoxTop, e.clientY) + 1;
     var captureBoxWidth = Math.abs(this.captureBoxLeft - e.clientX) - 1;
     var captureBoxHeight = Math.abs(this.captureBoxTop - e.clientY) - 1;
+    captureBoxLeft *= window.devicePixelRatio;
+    captureBoxTop *= window.devicePixelRatio;
+    captureBoxWidth *= window.devicePixelRatio;
+    captureBoxHeight *= window.devicePixelRatio;
     setTimeout(function () {
         captureBox.style.display = 'none';
         grayLayout.style.display = 'none';
diff --git a/manifest.json b/manifest.json
index c1b6f6e..461ac67 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
     "manifest_version": 2,
     "name": "__MSG_extName__",
     "short_name": "__MSG_extShortName__",
-    "version": "4.13",
+    "version": "4.14",
     "default_locale": "en",
     "description": "__MSG_extDesc__",
     "icons": {