/// <summary>
/// Gets the position and Bitmap of the system cursor.
/// </summary>
/// <param name="point"><code>ref</code> parameter, only to return a second value.</param>
/// <returns>The current Icon of the cursor</returns>
public static Bitmap CaptureImageCursor(ref Point point)
{
var cursorInfo = new Native.CURSORINFO();
cursorInfo.cbSize = Marshal.SizeOf(cursorInfo);
if (!Native.GetCursorInfo(out cursorInfo))
return null;
if (cursorInfo.flags != Native.CURSOR_SHOWING)
return null;
IntPtr hicon = Native.CopyIcon(cursorInfo.hCursor);
if (hicon == IntPtr.Zero)
return null;
Native.ICONINFO iconInfo;
if (!Native.GetIconInfo(hicon, out iconInfo))
return null;
point.X = cursorInfo.ptScreenPos.x - ((int)iconInfo.xHotspot);
point.Y = cursorInfo.ptScreenPos.y - ((int)iconInfo.yHotspot);
using (Bitmap maskBitmap = Image.FromHbitmap(iconInfo.hbmMask))
{
//Is this a monochrome cursor?
if (maskBitmap.Height == maskBitmap.Width * 2)
{
var resultBitmap = new Bitmap(maskBitmap.Width, maskBitmap.Width);
Graphics desktopGraphics = Graphics.FromHwnd(Native.GetDesktopWindow());
IntPtr desktopHdc = desktopGraphics.GetHdc();
IntPtr maskHdc = Native.CreateCompatibleDC(desktopHdc);
IntPtr oldPtr = Native.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.
Native.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 32, CopyPixelOperation.SourceCopy);
Native.BitBlt(resultHdc, 0, 0, 32, 32, maskHdc, 0, 0, CopyPixelOperation.SourceInvert);
resultGraphics.ReleaseHdc(resultHdc);
}
IntPtr newPtr = Native.SelectObject(maskHdc, oldPtr);
Native.DeleteObject(newPtr);
Native.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 resultBitmap;
}
}
Icon icon = Icon.FromHandle(hicon);
return icon.ToBitmap();
}
/// <summary>
/// Gets the position and Bitmap of the system cursor.
/// </summary>
/// <param name="point"><code>ref</code> parameter, only to return a second value.</param>
/// <returns>The current Icon of the cursor</returns>
public static Bitmap CaptureImageCursor(ref Point point)
{
var cursorInfo = new Native.CURSORINFO();
cursorInfo.cbSize = Marshal.SizeOf(cursorInfo);
if (!Native.GetCursorInfo(out cursorInfo))
return null;
if (cursorInfo.flags != Native.CURSOR_SHOWING)
return null;
IntPtr hicon = Native.CopyIcon(cursorInfo.hCursor);
if (hicon == IntPtr.Zero)
return null;
Native.ICONINFO iconInfo;
if (!Native.GetIconInfo(hicon, out iconInfo))
return null;
point.X = cursorInfo.ptScreenPos.x - ((int)iconInfo.xHotspot);
point.Y = cursorInfo.ptScreenPos.y - ((int)iconInfo.yHotspot);
try
{
using (Bitmap maskBitmap = Image.FromHbitmap(iconInfo.hbmMask))
{
//Is this a monochrome cursor?
//if (maskBitmap.Height == maskBitmap.Width * 2)
if (maskBitmap.Height == maskBitmap.Width * 2 && iconInfo.hbmColor == IntPtr.Zero)
{
var resultBitmap = new Bitmap(maskBitmap.Width, maskBitmap.Width);
using (Graphics desktopGraphics = Graphics.FromHwnd(Native.GetDesktopWindow()))
{
IntPtr desktopHdc = desktopGraphics.GetHdc();
IntPtr maskHdc = Native.CreateCompatibleDC(desktopHdc);
IntPtr oldPtr = Native.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.
// They take two pieces from a single image and merge into one.
//Bottom part
Native.BitBlt(resultHdc, 0, 0, resultBitmap.Width, resultBitmap.Height, maskHdc, 0, resultBitmap.Height, CopyPixelOperation.SourceCopy); //SourceCopy
//Top part.
Native.BitBlt(resultHdc, 0, 0, resultBitmap.Width, resultBitmap.Height, maskHdc, 0, 0, CopyPixelOperation.PatInvert); //SourceInvert
//BUG: It still don't take into account the background color (from the desktop) with the I-bean cursor, the one that inverts its color.
resultGraphics.ReleaseHdc(resultHdc);
}
IntPtr newPtr = Native.SelectObject(maskHdc, oldPtr);
Native.DeleteObject(newPtr);
Native.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 resultBitmap;
}
}
}
catch (Exception ex)
{
LogWriter.Log(ex, "Impossible to get the icon.");
}
Icon icon = Icon.FromHandle(hicon);
return icon.ToBitmap();
}
