65 lines
2.6 KiB
C#
65 lines
2.6 KiB
C#
namespace Standard
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{
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Windows;
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using System.Windows.Media;
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internal static class DpiHelper
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{
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private static Matrix _transformToDevice;
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private static Matrix _transformToDip;
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[SuppressMessage("Microsoft.Performance", "CA1810:InitializeReferenceTypeStaticFieldsInline")]
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static DpiHelper()
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{
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using (Standard.SafeDC edc = Standard.SafeDC.GetDesktop())
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{
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int deviceCaps = Standard.NativeMethods.GetDeviceCaps(edc, Standard.DeviceCap.LOGPIXELSX);
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int num2 = Standard.NativeMethods.GetDeviceCaps(edc, Standard.DeviceCap.LOGPIXELSY);
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_transformToDip = Matrix.Identity;
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_transformToDip.Scale(96.0 / ((double) deviceCaps), 96.0 / ((double) num2));
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_transformToDevice = Matrix.Identity;
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_transformToDevice.Scale(((double) deviceCaps) / 96.0, ((double) num2) / 96.0);
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}
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}
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public static Point DevicePixelsToLogical(Point devicePoint)
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{
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return _transformToDip.Transform(devicePoint);
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}
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public static Rect DeviceRectToLogical(Rect deviceRectangle)
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{
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Point point = DevicePixelsToLogical(new Point(deviceRectangle.Left, deviceRectangle.Top));
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return new Rect(point, DevicePixelsToLogical(new Point(deviceRectangle.Right, deviceRectangle.Bottom)));
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}
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public static Size DeviceSizeToLogical(Size deviceSize)
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{
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Point point = DevicePixelsToLogical(new Point(deviceSize.Width, deviceSize.Height));
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return new Size(point.X, point.Y);
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}
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public static Point LogicalPixelsToDevice(Point logicalPoint)
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{
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return _transformToDevice.Transform(logicalPoint);
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}
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[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
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public static Rect LogicalRectToDevice(Rect logicalRectangle)
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{
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Point point = LogicalPixelsToDevice(new Point(logicalRectangle.Left, logicalRectangle.Top));
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return new Rect(point, LogicalPixelsToDevice(new Point(logicalRectangle.Right, logicalRectangle.Bottom)));
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}
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[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
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public static Size LogicalSizeToDevice(Size logicalSize)
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{
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Point point = LogicalPixelsToDevice(new Point(logicalSize.Width, logicalSize.Height));
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return new Size { Width = point.X, Height = point.Y };
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}
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}
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}
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