The registry setting location for the ClearType level is an individual user setting that corresponds to a specific display device name: By setting the ClearType level somewhere between 0 and 100, you can create an intermediate level that is suitable to an individual's color sensitivity. However, a ClearType level of 0 renders text as gray scale. The default level is 100, which means ClearType uses the maximum capability of the color stripe elements of the display device. The ClearType level is an integer value that ranges from 0 to 100. For some individuals, the rendering of text that uses ClearType at its highest level does not produce the best reading experience. The ClearType level allows you to adjust the rendering of text based on the color sensitivity and perception of an individual.
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If the WPF ClearType registry settings are not set (which is the default state), the WPF application queries the Windows system parameters information for font smoothing settings.įor information on enumerating display device names, see the SystemParametersInfoWin32 function. These settings can also be created or modified by accessing the values directly by using the Windows Registry Editor.
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These settings can be accessed by an external configuration utility that knows how to reference the identified WPF ClearType registry settings. WPF specifies four registry settings for controlling ClearType features: Settingĭescribes the level of ClearType color clarity.ĭescribes the level of the pixel color component for a display device.ĭescribes the arrangement of pixels for a display device.ĭescribes the level of contrast for displayed text. In each of these cases, ClearType features need to be modified in order to provide the best reading experience for each individual. Some individuals can detect slight differences in color better than others. Text that is rendered with ClearType can also appear significantly different when viewed by individuals with varying levels of color sensitivity. For example, a small number of monitors implement the color stripe elements in blue, green, red order rather than the more common red, green, blue (RGB) order.
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Text that is rendered with ClearType can appear significantly different when viewed on various display devices. For more information on ClearType, see ClearType Overview. ClearType works by accessing the individual vertical color stripe elements in every pixel of an LCD screen.
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ClearType is a software technology developed by Microsoft that improves the readability of text on existing LCDs (Liquid Crystal Displays), such as laptop screens, Pocket PC screens and flat panel monitors. WPF applications that render text to a display device use ClearType features to provide an enhanced reading experience. This topic provides an overview of the Microsoft ClearType registry settings that are used by WPF applications.