Translations:HiDPI support/28/en

But the reality is that if you use raster graphics, it becomes pixelized, blurry, or aliased as it is displayed in non-native resolution. So developers now need to provide multiple versions of raster images, for each device pixel ratio. Usually, it's whole numbers: 1, 2, 3, 4. But it can also be fractional (125%, 150%, 175% = 1.25, 1.5, 1.75) meaning that there's still some scaling involved, but not as apparent.