Understanding the iPhone 6 Plus Screen

As you probably know by now, the iPhone 6 Plus renders things differently than every other iOS device to date. To developers, the device exposes a screen rectangle of 414 × 736 points, which the system renders at 3× scale into a backing store of 1242 × 2208 “logical” pixels.1 Since the iPhone 6 Plus display has only 1080 × 1920 hardware pixels, the backing store image is then downsampled by approximately 13% to the native resolution in an additional step…

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