private void AutoCropImage()
{
Bitmap bmp = ImageHelpers.AutoCropImage((Bitmap)Form.Canvas);
if (bmp != null)
{
UpdateCanvas(bmp);
}
}
public Image CaptureWindowTransparent(IntPtr handle)
{
if (handle.ToInt32() > 0)
{
Rectangle rect = CaptureHelpers.GetWindowRectangle(handle);
if (CaptureShadow && !NativeMethods.IsZoomed(handle) && NativeMethods.IsDWMEnabled())
{
rect.Inflate(ShadowOffset, ShadowOffset);
Rectangle intersectBounds = Screen.AllScreens.Select(x => x.Bounds).Where(x => x.IntersectsWith(rect)).Combine();
rect.Intersect(intersectBounds);
}
Bitmap whiteBackground = null, blackBackground = null, whiteBackground2 = null;
CursorData cursorData = null;
bool isTransparent = false, isTaskbarHide = false;
try
{
if (AutoHideTaskbar)
{
isTaskbarHide = NativeMethods.SetTaskbarVisibilityIfIntersect(false, rect);
}
if (CaptureCursor)
{
try
{
cursorData = new CursorData();
}
catch (Exception e)
{
DebugHelper.WriteException(e, "Cursor capture failed.");
}
}
using (Form form = new Form())
{
form.BackColor = Color.White;
form.FormBorderStyle = FormBorderStyle.None;
form.ShowInTaskbar = false;
form.StartPosition = FormStartPosition.Manual;
form.Location = new Point(rect.X, rect.Y);
form.Size = new Size(rect.Width, rect.Height);
NativeMethods.ShowWindow(form.Handle, (int)WindowShowStyle.ShowNoActivate);
if (!NativeMethods.SetWindowPos(form.Handle, handle, 0, 0, 0, 0,
SetWindowPosFlags.SWP_NOMOVE | SetWindowPosFlags.SWP_NOSIZE | SetWindowPosFlags.SWP_NOACTIVATE))
{
form.Close();
DebugHelper.WriteLine("Transparent capture failed. Reason: SetWindowPos fail.");
return(CaptureWindow(handle));
}
Thread.Sleep(10);
Application.DoEvents();
whiteBackground = (Bitmap)CaptureRectangleNative(rect);
form.BackColor = Color.Black;
Application.DoEvents();
blackBackground = (Bitmap)CaptureRectangleNative(rect);
form.BackColor = Color.White;
Application.DoEvents();
whiteBackground2 = (Bitmap)CaptureRectangleNative(rect);
form.Close();
}
Bitmap transparentImage;
if (ImageHelpers.IsImagesEqual(whiteBackground, whiteBackground2))
{
transparentImage = CreateTransparentImage(whiteBackground, blackBackground);
isTransparent = true;
}
else
{
DebugHelper.WriteLine("Transparent capture failed. Reason: Images not equal.");
transparentImage = whiteBackground2;
}
if (cursorData != null)
{
cursorData.DrawCursor(transparentImage, rect.Location);
}
if (isTransparent)
{
transparentImage = ImageHelpers.AutoCropImage(transparentImage);
if (!CaptureShadow)
{
TrimShadow(transparentImage);
}
}
return(transparentImage);
}
finally
{
if (isTaskbarHide)
{
NativeMethods.SetTaskbarVisibility(true);
}
if (whiteBackground != null)
{
whiteBackground.Dispose();
}
if (blackBackground != null)
{
blackBackground.Dispose();
}
if (isTransparent && whiteBackground2 != null)
{
whiteBackground2.Dispose();
}
}
}
return(null);
}
public override Bitmap Apply(Bitmap bmp)
{
return(ImageHelpers.AutoCropImage(bmp, false, Sides));
}
public override Image Apply(Image img)
{
return(ImageHelpers.AutoCropImage((Bitmap)img, false, Sides));
}
