public static Cursor CreateCursorFromBitmap(Bitmap bitmap, byte alphaLevel, Point hotSpot)
{
Bitmap cursorBitmap = null;
External.ICONINFO iconInfo = new External.ICONINFO();
Rectangle rectangle = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
try
{
// Here, the premultiplied alpha channel is specified
cursorBitmap = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format32bppPArgb);
// I'm assuming the source bitmap can be locked in a 24 bits per pixel format
BitmapData bitmapData = bitmap.LockBits(rectangle, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
BitmapData cursorBitmapData = cursorBitmap.LockBits(rectangle, ImageLockMode.WriteOnly, cursorBitmap.PixelFormat);
// Use either SafeCopy() or UnsafeCopy() to set the bitmap contents
SafeCopy(bitmapData, cursorBitmapData, alphaLevel);
//UnsafeCopy(bitmapData, cursorBitmapData, alphaLevel);
cursorBitmap.UnlockBits(cursorBitmapData);
bitmap.UnlockBits(bitmapData);
if (!External.GetIconInfo(bitmap.GetHicon(), out iconInfo))
{
throw new Exception("GetIconInfo() failed.");
}
iconInfo.xHotspot = hotSpot.X;
iconInfo.yHotspot = hotSpot.Y;
iconInfo.IsIcon = false;
//IntPtr cursorPtr = External.CreateIconIndirect(ref iconInfo);
SafeIconHandle cursorPtr = External.CreateIconIndirect1(ref iconInfo);
//if (cursorPtr == IntPtr.Zero)
// throw new Exception("CreateIconIndirect() failed.");
return(CursorInteropHelper.Create(cursorPtr));
//return (new Cursor(cursorPtr));
}
finally
{
if (cursorBitmap != null)
{
cursorBitmap.Dispose();
}
if (iconInfo.ColorBitmap != IntPtr.Zero)
{
External.DeleteObject(iconInfo.ColorBitmap);
}
if (iconInfo.MaskBitmap != IntPtr.Zero)
{
External.DeleteObject(iconInfo.MaskBitmap);
}
}
}
override protected bool ReleaseHandle()
{
return(External.DestroyIcon(handle));
}