This modifies jqPlot to support retina displays.

fixes matomo-org#4389
sabl0r · Dec 17, 2013 · 9c58e9d · 9c58e9d
1 parent 5d44202
commit 9c58e9d
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Showing 3 changed files with 21 additions and 3 deletions.
diff --git a/libs/jqplot/build_minified_script.sh b/libs/jqplot/build_minified_script.sh
@@ -21,6 +21,6 @@ cat plugins/jqplot.categoryAxisRenderer.js >> jqplot-custom.min.js-temp
 cat plugins/jqplot.canvasTextRenderer.js >> jqplot-custom.min.js-temp
 cat plugins/jqplot.canvasAxisTickRenderer.js >> jqplot-custom.min.js-temp
 
-java -jar ../../js/yuicompressor-2.4.2/build/yuicompressor-2.4.2.jar --type js --line-break 1000 jqplot-custom.min.js-temp > jqplot-custom.min.js 
+java -jar ../../js/yuicompressor-2.4.7/build/yuicompressor-2.4.7.jar --type js --line-break 1000 jqplot-custom.min.js-temp > jqplot-custom.min.js 
 
 rm ./jqplot-custom.min.js-temp
diff --git a/libs/jqplot/jqplot-custom.min.js b/libs/jqplot/jqplot-custom.min.js
diff --git a/libs/jqplot/jqplot.core.js b/libs/jqplot/jqplot.core.js
@@ -295,6 +295,24 @@
             if ($.jqplot.use_excanvas) {
                 return window.G_vmlCanvasManager.initElement(canvas);
             }
+            var cctx = canvas.getContext('2d');
+
+            var canvasBackingScale = 1;
+            if (window.devicePixelRatio > 1 && (cctx.webkitBackingStorePixelRatio === undefined || 
+                                                cctx.webkitBackingStorePixelRatio < 2)) {
+                canvasBackingScale = window.devicePixelRatio;
+            }
+            var oldWidth = canvas.width;
+            var oldHeight = canvas.height;
+
+            canvas.width = canvasBackingScale * canvas.width;
+            canvas.height = canvasBackingScale * canvas.height;
+            canvas.style.width = oldWidth + 'px';
+            canvas.style.height = oldHeight + 'px';
+            cctx.save();
+
+            cctx.scale(canvasBackingScale, canvasBackingScale);
+
             return canvas;
         };