/// <summary>
/// Gets the dpi of the monitor.
/// </summary>
/// <param name="pt">A point specifying the monitor that should be used.</param>
/// <param name="dpiType">A value of MonitorDpiType indicating the dpi type to be returned.</param>
/// <returns>The dpi of the monitor.</returns>
public static int GetMonitorDpiFromPoint(WinPoint pt, MonitorDpiType dpiType)
{
IntPtr hmonitor = MonitorFromPoint(pt, MonitorOptions.MONITOR_DEFUALTTONEAREST);
GetDpiForMonitor(hmonitor, dpiType, out int dpiX, out int dpiY);
return(dpiX);
}
/// <summary>
/// Maps a point in screen coordinates to coordinates relative to the active window.
/// </summary>
/// <param name="point">A point in screen coordinates.</param>
/// <returns>The given point in coordinates relative to the active window.</returns>
public static WinPoint ScreenPointToClient(WinPoint point)
{
IntPtr hWnd = GetForegroundWindow();
ScreenToClient(hWnd, ref point);
return(point);
}
/// <summary>
/// Returns the color of the pixel at the mouse's position.
/// </summary>
public static Color GetPixelColor(WinPoint point)
{
Bitmap bmp = new Bitmap(1, 1);
using (Graphics g = Graphics.FromImage(bmp))
{
try
{
g.CopyFromScreen(point.X, point.Y, 0, 0, new Size(1, 1));
}
catch { }
}
Color color = bmp.GetPixel(0, 0);
bmp.Dispose();
return(Color.FromArgb(color.R, color.G, color.B));
}
/// <summary>
/// Creates a PositionData instance from a given point.
/// </summary>
public PositionData(Point position)
{
WinPoint winPos = (WinPoint)position;
this.PhysicalPosition = position;
// Determine dpi information
this.Dpi = WinApi.GetMonitorDpiFromPoint(winPos, MonitorDpiType.EFFECTIVE_DPI);
this.DpiScaling = Math.Round(Dpi / (double)96, 2);
// Determine scaled position.
this.ScaledPosition = new Point((int)(position.X / DpiScaling),
(int)(position.Y / DpiScaling));
// Determine relative position.
this.RelativePosition = (Point)WinApi.ScreenPointToClient(winPos);
// Determine raw dpi.
this.RawDpi = WinApi.GetMonitorDpiFromPoint(winPos, MonitorDpiType.RAW_DPI);
this.DpiRawRatio = Math.Round(Dpi / (double)RawDpi, 2);
// Determine screen bounds
this.ScreenResolution = Screen.FromPoint(position).Bounds.Size;
// Determine color at mouse position.
this.PixelColor = GetPixelColor(winPos);
}
private static extern IntPtr MonitorFromPoint(WinPoint pt, MonitorOptions dwFlags);
private static extern bool ScreenToClient(IntPtr hWnd, ref WinPoint lpPoint);
