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Windows Vista retains the Windows XP style scaling option which when enabled turns off DPI virtualization for all applications globally. DPI virtualization is a compatibility option as application developers are all expected to update their apps to support high DPI without relying on DPI virtualization.
Additionally, Windows 7 reads the monitor DPI from the EDID and automatically sets the DPI value to match the monitor's physical pixel density, unless the effective resolution is less than 1024 x 768. In Windows 8, only the DPI scaling percentage is shown in the DPI changing dialog and the display of the raw DPI value has been removed. [9]
The Compatibility tab in Windows Explorer includes new options to Disable desktop composition, Disable display scaling on high DPI settings, and Run this program as an administrator. There are new options to run programs in compatibility mode for either Windows XP (Service Pack 2) or Windows Server 2003 (Service Pack 1).
Pixel aspect ratio (PAR) The horizontal to vertical ratio of each pixel. Storage aspect ratio (SAR) The horizontal to vertical ratio of solely the number of pixels in each direction.
The outside of the square shown above is 200 pixels by 200 pixels. To determine a monitor's ppi, set the OS DPI scaling setting at 100% and the browser's zoom at 100%, then measure the width and height, in inches, of the square as displayed on a given monitor. Dividing 200 by the measured width or height gives the monitor's horizontal or ...
Note the DE-9 connector, cryptic mode switch, contrast and brightness controls at front, and the V-Size and V-Hold knobs at rear, which allow the control of the scaling and signal to CRT refresh rate synchronization respectively. Various computer display standards or display modes have been used in the history of the personal computer.
With Windows, applications built using Windows Presentation Foundation (which is native [citation needed] to Windows Vista, but can be downloaded for Windows XP and Server 2003) are vector-based and scale losslessly based on Windows DPI settings. However, even without this, it has always been possible to build applications to be DPI-aware. [1]
An image size can be changed in several ways. Consider resizing a 160x160 pixel photo to the following 40x40 pixel thumbnail and then scaling the thumbnail to a 160x160 pixel image. Also consider doubling the size of the following image containing text.