79 lines
2.4 KiB
C#
79 lines
2.4 KiB
C#
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namespace AntdWpf.Utils
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{
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using System.Windows;
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using System.Windows.Media;
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public static class DpiUtil
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{
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public static DpiScale GetDpi(Visual visual)
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{
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#if NET40 || NET45
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var source = PresentationSource.FromVisual(visual);
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if (source?.CompositionTarget == null)
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{
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return new DpiScale(1.0, 1.0);
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}
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var device = source.CompositionTarget.TransformToDevice;
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return new DpiScale(device.M11, device.M22);
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#else
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return VisualTreeHelper.GetDpi(visual);
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#endif
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}
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}
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#if NET40 || NET45
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/// <summary>Stores DPI information from which a <see cref="T:System.Windows.Media.Visual" /> or <see cref="T:System.Windows.UIElement" /> is rendered.</summary>
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public struct DpiScale
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{
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/// <summary>Gets the DPI scale on the X axis.</summary>
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/// <returns>The DPI scale for the X axis.</returns>
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public double DpiScaleX { get; private set; }
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/// <summary>Gets the DPI scale on the Yaxis.</summary>
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/// <returns>The DPI scale for the Y axis.</returns>
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public double DpiScaleY { get; private set; }
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/// <summary>Get or sets the PixelsPerDip at which the text should be rendered.</summary>
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/// <returns>The current <see cref="P:System.Windows.DpiScale.PixelsPerDip" /> value.</returns>
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public double PixelsPerDip
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{
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get
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{
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return DpiScaleY;
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}
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}
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/// <summary>Gets the DPI along X axis.</summary>
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/// <returns>The DPI along the X axis.</returns>
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public double PixelsPerInchX
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{
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get
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{
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return 96.0 * DpiScaleX;
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}
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}
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/// <summary>Gets the DPI along Y axis.</summary>
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/// <returns>The DPI along the Y axis.</returns>
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public double PixelsPerInchY
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{
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get
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{
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return 96.0 * DpiScaleY;
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}
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}
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/// <summary>Initializes a new instance of the <see cref="T:System.Windows.DpiScale" /> structure.</summary>
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/// <param name="dpiScaleX">The DPI scale on the X axis.</param>
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/// <param name="dpiScaleY">The DPI scale on the Y axis. </param>
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public DpiScale(double dpiScaleX, double dpiScaleY)
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{
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DpiScaleX = dpiScaleX;
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DpiScaleY = dpiScaleY;
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}
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}
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#endif
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}
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