/// <summary>
/// Checks if the cursor has changed sice the last invokation and returns the serialized new cursor icon
/// </summary>
/// <returns>Serialized data bytes if icon has changed else null</returns>
public static IntPtr CheckCursorChanged()
{
USER32.CURSORINFO ci = new USER32.CURSORINFO();
ci.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(ci);
USER32.GetCursorInfo(out ci);
int val = ci.hCursor.ToInt32();
if (val != ScreenSnap._previousCursor)
{
ScreenSnap._previousCursor = val;
//return CaptureCursor();
return ci.hCursor;
}
return IntPtr.Zero;
}
/// <summary>
/// Draws cursor onto the bitmap
/// </summary>
/// <param name="bmp">Source bitmap</param>
/// <returns>Bitmap object</returns>
public static Bitmap PlaceCursor(Bitmap bmp)
{
Graphics g = Graphics.FromImage(bmp);
{
USER32.CURSORINFO ci = new USER32.CURSORINFO();
ci.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(ci);
USER32.GetCursorInfo(out ci);
USER32.ICONINFO icInfo;
if (ci.flags == USER32.CURSORINFOFlags.CURSOR_SHOWING && ci.hCursor.ToInt32() != 0)
{
IntPtr hicon = USER32.CopyIcon(ci.hCursor);
int x = System.Windows.Forms.Cursor.Position.X;
int y = System.Windows.Forms.Cursor.Position.Y;
if (USER32.GetIconInfo(hicon, out icInfo))
{
x = ci.ptScreenPos.X - ((int)icInfo.xHotspot);
y = ci.ptScreenPos.Y - ((int)icInfo.yHotspot);
}
try
{
//ic.ToBitmap();
//g.DrawImage(ic.ToBitmap(), System.Windows.Forms.Cursor.Position.X, System.Windows.Forms.Cursor.Position.Y);
g.DrawIcon(Icon.FromHandle(ci.hCursor), x, y);
USER32.DestroyIcon(hicon);
}
catch(Exception){}
}
return bmp;
}
}
static Icon CaptureCursor()
{
USER32.CURSORINFO cursorInfo = new USER32.CURSORINFO();
cursorInfo.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(cursorInfo);
if (!USER32.GetCursorInfo(out cursorInfo))
return null;
if (cursorInfo.flags != USER32.CURSORINFOFlags.CURSOR_SHOWING)
return null;
IntPtr hicon = USER32.CopyIcon(cursorInfo.hCursor);
if (hicon == IntPtr.Zero)
return null;
USER32.ICONINFO iconInfo;
if (!USER32.GetIconInfo(hicon, out iconInfo))
return null;
//x = cursorInfo.ptScreenPos.X - ((int)iconInfo.xHotspot);
//y = cursorInfo.ptScreenPos.Y - ((int)iconInfo.yHotspot);
using (Bitmap maskBitmap = Bitmap.FromHbitmap(iconInfo.hbmMask))
{
// Is this a monochrome cursor?
if (maskBitmap.Height == maskBitmap.Width * 2)
{
Bitmap resultBitmap = new Bitmap(maskBitmap.Width, maskBitmap.Width);
Graphics desktopGraphics = Graphics.FromHwnd(USER32.GetDesktopWindow());
IntPtr desktopHdc = desktopGraphics.GetHdc();
IntPtr maskHdc = GDI32.CreateCompatibleDC(desktopHdc);
IntPtr oldPtr = GDI32.SelectObject(maskHdc, maskBitmap.GetHbitmap());
using (Graphics resultGraphics = Graphics.FromImage(resultBitmap))
{
IntPtr resultHdc = resultGraphics.GetHdc();
// These two operation will result in a black cursor over a white background.
// Later in the code, a call to MakeTransparent() will get rid of the white background.
GDI32.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 32, TernaryRasterOperations.SRCCOPY);
GDI32.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 0, TernaryRasterOperations.SRCINVERT);
resultGraphics.ReleaseHdc(resultHdc);
}
IntPtr newPtr = GDI32.SelectObject(maskHdc, oldPtr);
USER32.DeleteObject(newPtr);
GDI32.DeleteDC(maskHdc);
desktopGraphics.ReleaseHdc(desktopHdc);
// Remove the white background from the BitBlt calls,
// resulting in a black cursor over a transparent background.
resultBitmap.MakeTransparent(Color.White);
return Icon.FromHandle(resultBitmap.GetHicon());
}
}
return Icon.FromHandle(hicon);
}