dot vs pixel

Question

Hello,

Windows 8.1 added APIs for DPI. But what're the differences between DPI and PPI?

In apps, the height and width are in pixels. How to make the apps look the same cross devices with different PPI and DPI?

 

Thanks.

Answer 1

See Guidelines for window sizes and scaling to screens and Quickstart: Designing apps for different window sizes

From a Xaml app's point of view you'll always work in device-independent-pixels (DIPs) and don't generally need to worry about PPI or DPI specifically. Design the app with logical layout and underlying runtime will magnify the app per the user's settings.

The minor exception is for bitmaps, where the app needs to provide separate versions for the various DPI levels.

--Rob

Answer 2

Thanks.