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Enable devicePixelRatio for desktop browsers

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This commit is contained in:
Andrei Mihailov 2015-04-12 13:52:09 +02:00
parent 98e575aaf7
commit cf93f973ec
1 changed files with 2 additions and 7 deletions
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9
src/Canvas.js
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@ -2,12 +2,7 @@
// calculate pixel ratio
var canvas = Konva.Util.createCanvasElement(),
context = canvas.getContext('2d'),
// if using a mobile device, calculate the pixel ratio. Otherwise, just use
// 1. For desktop browsers, if the user has zoom enabled, it affects the pixel ratio
// and causes artifacts on the canvas. As of 02/26/2014, there doesn't seem to be a way
// to reliably calculate the browser zoom for modern browsers, which is why we just set
// the pixel ratio to 1 for desktops
_pixelRatio = Konva.UA.mobile ? (function() {
_pixelRatio = (function() {
var devicePixelRatio = window.devicePixelRatio || 1,
backingStoreRatio = context.webkitBackingStorePixelRatio
|| context.mozBackingStorePixelRatio
@ -16,7 +11,7 @@
|| context.backingStorePixelRatio
|| 1;
return devicePixelRatio / backingStoreRatio;
})() : 1;
})();
/**
* Canvas Renderer constructor