What is the use of win 10 dpi scaling?

Win 10 The latest DPI scaling mechanism: DPI virtualization Win 10 The latest DPI scaling mechanism has been adopted by Windows Vista/Win7/Win8/Win8.1. If the DPI scaling ratio does not exceed 125%, continue to use the traditional DPI scaling mechanism, and then start this new mode. It should be pointed out that the scaling ratio of 125% will not cause serious interface confusion in most cases, and the fonts will be clear after scaling. Specifically, DPI scaling will be disabled for programs that report support for DPI adaptation. For programs that are not reported to support DPI adaptation, the system will adopt the following mechanism: if the scaling ratio is an integer multiple of 100%, the system will scale multiple points from one point. When the scaling ratio is selected as 200%/300%/. . . In the original interface, 1 minute corresponds to 4 points /9 points in turn. . . . If the scaling ratio is not an integer multiple of 100%, the system will first submit the virtual resolution to the application, then the system will render the software interface to an off-screen state, and then enlarge it to the DPI level selected by the user. Take 1920* 1080 resolution and 150% scaling as an example. Firstly, the system submits the current resolution 1280x720 to the application, and after obtaining the interface of off-screen rendering, it uses the conventional image interpolation algorithm to enlarge it. It should be reminded that interpolation will inevitably lead to a series of problems such as fuzzy interface and uneven fonts. Advantages: Normal interface Disadvantages: Fuzzy interface Win 10 DPI scaling mechanism: Fully DPI virtualization Win 10 DPI scaling mechanism is almost the same as modern DPI scaling mechanism, the only difference is that all DPI levels (including 125%) adopt DPI virtualization mechanism to ensure normal interface. On the left is Win 10 DPI mechanism, and on the right is Win8. 1 DPI mechanism. Finally, the scaling mechanism of MAC DPI is briefly introduced. The retina screen adopts 200% DPI zoom level, and the implementation principle is the same as Windows. The only difference is that 100% DPI is used in the video image area when MAC OS X software displays video and images, so as to ensure the display quality of video and images. The above is about how to set the latest DPI scaling technology of Win 10. As long as Win 10 DPI zoom setting is correct, the computer screen will be much clearer.