/*************************************************************************
* method for retrieving the current bitmap of the global cursor
**************************************************************************/
public static cursorInTime CaptureCursor()
{
Bitmap bmp;
IntPtr hicon;
Win32Stuff.CURSORINFO ci = new Win32Stuff.CURSORINFO();
Win32Stuff.ICONINFO icInfo;
ci.cbSize = Marshal.SizeOf(ci);
try
{
if (Win32Stuff.GetCursorInfo(out ci))
{
if (ci.flags == Win32Stuff.CURSOR_SHOWING)
{
hicon = Win32Stuff.CopyIcon(ci.hCursor);
Win32Stuff.GetIconInfo(hicon, out icInfo);
while (icInfo.hbmMask == IntPtr.Zero)
{
Win32Stuff.GetIconInfo(hicon, out icInfo);
System.Diagnostics.Debug.Print("Retrying cursor capture.");
}
int x = ci.ptScreenPos.x - ((int)icInfo.xHotspot);
int y = ci.ptScreenPos.y - ((int)icInfo.yHotspot);
using (Bitmap maskBitmap = Bitmap.FromHbitmap(icInfo.hbmMask))
{
// Is this a monochrome cursor?
// This portion taken from http://stackoverflow.com/questions/918990/c-sharp-capturing-the-mouse-cursor-image
if (maskBitmap.Height == maskBitmap.Width * 2)
{
// Reverting to simple saving and no cleanup because of an object leak
Rectangle sourceRectangle = new Rectangle(0, 0, maskBitmap.Width, maskBitmap.Height / 2);
Bitmap secondBitmap = maskBitmap.Clone(sourceRectangle, PixelFormat.DontCare);
bmp = secondBitmap;
}
else
{
Icon ic = Icon.FromHandle(hicon);
bmp = ic.ToBitmap();
Win32Stuff.DestroyIcon(ic.Handle);
}
}
Win32Stuff.DeleteObject(hicon);
Win32Stuff.DeleteObject(icInfo.hbmColor);
Win32Stuff.DeleteObject(icInfo.hbmMask);
Win32Stuff.DeleteObject(ci.hCursor);
return new cursorInTime(x, y, bmp);
}
}
}
catch (ExternalException e)
{
System.Diagnostics.Debug.Print(e.ToString());
}
return null;
}
// Method for retrieving the current bitmap of the global cursor
public static cursorInTime CaptureCursor()
{
Bitmap bmp;
Win32Stuff.CURSORINFO ci = new Win32Stuff.CURSORINFO();
Win32Stuff.ICONINFO icInfo;
ci.cbSize = Marshal.SizeOf(ci);
try
{
if (Win32Stuff.GetCursorInfo(out ci))
{
if (ci.flags == Win32Stuff.CURSOR_SHOWING)
{
Win32Stuff.GetIconInfo(ci.hCursor, out icInfo);
// If fetch failed, something wrong with current cursor, give up
if (icInfo.hbmMask == IntPtr.Zero)
{
Win32Stuff.DeleteObject(icInfo.hbmColor);
Win32Stuff.DeleteObject(icInfo.hbmMask);
Win32Stuff.DeleteObject(ci.hCursor);
return(null);
}
int x = ci.ptScreenPos.x - ((int)icInfo.xHotspot);
int y = ci.ptScreenPos.y - ((int)icInfo.yHotspot);
using (Bitmap maskBitmap = Bitmap.FromHbitmap(icInfo.hbmMask))
{
// Is this a monochrome cursor?
if (maskBitmap.Height == maskBitmap.Width * 2)
{
bmp = maskBitmap.Clone(new Rectangle(0, 0, maskBitmap.Width, maskBitmap.Height / 2), PixelFormat.DontCare);
}
else
{
Icon ic = Icon.FromHandle(ci.hCursor);
bmp = ic.ToBitmap();
Win32Stuff.DestroyIcon(ic.Handle);
ic.Dispose();
}
maskBitmap.Dispose();
}
Win32Stuff.DeleteObject(icInfo.hbmColor);
Win32Stuff.DeleteObject(icInfo.hbmMask);
Win32Stuff.DestroyIcon(ci.hCursor);
return(new cursorInTime(x, y, bmp));
}
}
}
// GDI+ Had a bad day getting the cursor, API says ignore and try again
catch (ExternalException e)
{
System.Diagnostics.Debug.Print(e.ToString());
using (StreamWriter w = File.AppendText("Cursor-Bug-External-Exception-Log.txt"))
{
w.Write("\r\nLog Entry : ");
w.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(),
DateTime.Now.ToLongDateString());
w.WriteLine(" :");
w.WriteLine(" :{0}", e.ToString());
w.WriteLine("-------------------------------");
}
}
//Invalid cursor information! The cursor is likely blank.
catch (ArgumentException e)
{
System.Diagnostics.Debug.Print(e.ToString());
using (StreamWriter w = File.AppendText("Cursor-Bug-Argument-Exception-Log.txt"))
{
w.Write("\r\nLog Entry : ");
w.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(),
DateTime.Now.ToLongDateString());
w.WriteLine(" :");
w.WriteLine(" :{0}", e.ToString());
w.WriteLine("-------------------------------");
}
}
return(null);
}
