113 lines
3.6 KiB
C#
113 lines
3.6 KiB
C#
#if NETFRAMEWORK || WINDOWS
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using System;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace DH.RBAC.Utility.Other
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{
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public class ScreenUtils
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{
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#region Dll引用
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[DllImport("User32.dll", EntryPoint = "GetDC")]
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private extern static IntPtr GetDC(IntPtr hWnd);
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[DllImport("User32.dll", EntryPoint = "ReleaseDC")]
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private extern static int ReleaseDC(IntPtr hWnd, IntPtr hDC);
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[DllImport("gdi32.dll")]
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public static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
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[DllImport("User32.dll")]
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public static extern int GetSystemMetrics(int hWnd);
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[DllImport("User32.dll")]
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private static extern IntPtr MonitorFromPoint([In] System.Drawing.Point pt, [In] uint dwFlags);
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[DllImport("Shcore.dll")]
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private static extern IntPtr GetDpiForMonitor([In] IntPtr hmonitor, [In] DpiType dpiType, [Out] out uint dpiX, [Out] out uint dpiY);
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#endregion
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const int DESKTOPVERTRES = 117;
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const int DESKTOPHORZRES = 118;
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const int SM_CXSCREEN = 0;
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const int SM_CYSCREEN = 1;
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/// <summary>
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/// 获取DPI缩放比例
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/// </summary>
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/// <param name="dpiscalex"></param>
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/// <param name="dpiscaley"></param>
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public static void GetDPIScale(ref float dpiscalex, ref float dpiscaley)
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{
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int x = GetSystemMetrics(SM_CXSCREEN);
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int y = GetSystemMetrics(SM_CYSCREEN);
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IntPtr hdc = GetDC(IntPtr.Zero);
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int w = GetDeviceCaps(hdc, DESKTOPHORZRES);
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int h = GetDeviceCaps(hdc, DESKTOPVERTRES);
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ReleaseDC(IntPtr.Zero, hdc);
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dpiscalex = (float)w / x;
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dpiscaley = (float)h / y;
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}
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/// <summary>
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/// 获取分辨率
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/// </summary>
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/// <param name="width">宽</param>
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/// <param name="height">高</param>
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private static void GetResolving(ref int width, ref int height)
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{
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IntPtr hdc = GetDC(IntPtr.Zero);
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width = GetDeviceCaps(hdc, DESKTOPHORZRES);
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height = GetDeviceCaps(hdc, DESKTOPVERTRES);
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ReleaseDC(IntPtr.Zero, hdc);
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}
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public static int ScreenCount
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{
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get
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{
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return Screen.AllScreens.Length;
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}
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}
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public static ScreenSize GetScreenSize(int index)
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{
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if (index > (ScreenCount - 1))
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throw new Exception("索引异常");
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Screen screen = Screen.AllScreens[index];
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uint width = 0;
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uint height = 0;
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GetDpi(screen, DpiType.Effective, out width, out height);
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double scale = width / 96.0;
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return new ScreenSize { Left = (int)(screen.Bounds.X / scale), Top = screen.Bounds.Y, Width = (int)(screen.Bounds.Width / scale), Height = (int)(screen.Bounds.Height / scale), Scale = scale };
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}
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public static void GetDpi(Screen screen, DpiType dpiType, out uint dpiX, out uint dpiY)
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{
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var pnt = new System.Drawing.Point(screen.Bounds.Left + 800, screen.Bounds.Top + 600);
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var mon = MonitorFromPoint(pnt, 2);
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GetDpiForMonitor(mon, dpiType, out dpiX, out dpiY);
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}
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}
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public enum DpiType
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{
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Effective = 0,
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Angular = 1,
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Raw = 2,
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}
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public class ScreenSize
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{
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public int Left { get; set; }
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public int Top { get; set; }
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public int Width { get; set; }
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public int Height { get; set; }
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public double Scale { get; set; }
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}
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}
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#endif |