void Restart(object sender, RoutedEventArgs e)
{
_bitmap.ImportAsFragment(_savedCopy, 0, 0);
image.Source = _bitmap.ToWriteableBitmap();
}
void Restart(object sender, RoutedEventArgs e)
{
_bitmap.ImportAsFragment(_savedCopy, 0, 0);
UpdateImageSource(false);
}
void Render(IntPtr hdc)
{
#region prepare device resources
var rt = _d2dContext;
if (rt == null)
{
CreateDeviceResources();
rt = _d2dContext;
}
#endregion
#region draw to the intermediate bitmap (of the original bitmap size)
if (_imBmp == null && _bitmap.HasImage)
{
var bmProps = new D2D.BitmapProperties1(
new D2D.PixelFormat(DXGI.Format.B8G8R8A8_UNorm, D2D.AlphaMode.Premultiplied),
(float)_bitmap.DpiX, (float)_bitmap.DpiY, D2D.BitmapOptions.Target);
_imBmp = D2D.Bitmap1.Create(rt, new Size2L(_bitmap.PixelWidth, _bitmap.PixelHeight), bmProps);
_needUpdateIM = true;
}
if (_needUpdateIM && _imBmp != null)
{
_needUpdateIM = false;
rt.SetTarget(_imBmp);
rt.BeginDraw();
rt.Clear(null);
var buffer = _bitmap.ToD2DBitmap1(rt, D2D.BitmapOptions.None);
if (!_applyEffect)
{
rt.DrawImage(buffer);
}
else
{
_warp.SetNormPositions(_warpEnd, _warpStart);
_warp.Effect.SetInput(0, buffer);
rt.DrawImage(_warp.Effect, Point2F.Empty);
//_blur.SetInputEffect(0, _warp.Effect);
//rt.DrawImage(_blur, Point2F.Empty);
}
buffer.Dispose();
if (!rt.EndDraw(true))
{
DiscardDeviceResources();
return;
}
rt.SetTarget(null);
if (_applyEffect)
{
_bitmap.ImportAsFragment(_imBmp, rt, new RectL(_bitmap.PixelWidth, _bitmap.PixelHeight), 0, 0);
_applyEffect = false;
}
}
#endregion
#region draw the result to the target bitmap (of the target control size)
if (_targetBmp == null)
{
var bmProps = new D2D.BitmapProperties1(
new D2D.PixelFormat(DXGI.Format.B8G8R8A8_UNorm, D2D.AlphaMode.Ignore),
_dpiX, _dpiY, D2D.BitmapOptions.Target | D2D.BitmapOptions.GdiCompatible);
_targetBmp = D2D.Bitmap1.Create(rt, new Size2L(Width, Height), bmProps);
}
rt.SetTarget(_targetBmp);
rt.BeginDraw();
rt.Clear(new ColorF(this.BackColor));
if (!_targetRect.IsEmpty)
{
if (_imBmp != null)
{
rt.DrawBitmap(_imBmp, _targetRect);
}
if (_drawLine)
{
var pt1 = new Point2F(_targetRect.Width * _warpStart.X + _targetRect.Left, _targetRect.Height * _warpStart.Y + _targetRect.Top);
var pt2 = new Point2F(_targetRect.Width * _warpEnd.X + _targetRect.Left, _targetRect.Height * _warpEnd.Y + _targetRect.Top);
rt.DrawLine(pt1, pt2, _lineBrush, _scaleFactor * 7, _lineStrokeStyle);
}
}
#endregion
#region BitBlt to GDI
var gi = rt.QueryGdiInterop();
var gidc = gi.GetDC(D2D.DeviceContextInitializeMode.Copy);
Win32.BitBlt(hdc, 0, 0, Width, Height, gidc, 0, 0, Win32.SRCCOPY);
gi.ReleaseDC(null);
gi.Dispose();
#endregion
#region EndDraw
if (!rt.EndDraw(true))
{
DiscardDeviceResources();
return;
}
rt.SetTarget(null);
#endregion
}