Created
May 8, 2013 12:29
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Optimize html5 canvas for retina display.
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| retinaCanvas = -> | |
| if window.devicePixelRatio > 1 | |
| canvas.width = W * window.devicePixelRatio | |
| canvas.height = H * window.devicePixelRatio | |
| ctx.scale(window.devicePixelRatio, window.devicePixelRatio) | |
| else | |
| canvas.width = W | |
| canvas.height = H |
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