private void UpdateLayeredWindow()
{
unsafe
{
var rect = new RECT();
User32.GetWindowRect(Handle, ref rect);
if (rect.Width == 0 || rect.Height == 0)
{
return;
}
var newLocation = new POINT(rect.left, rect.top);
var newSize = new SIZE(rect.Width, rect.Height);
var zeroPoint = new POINT(0, 0);
if (rect.Width == 0 || rect.Height == 0)
{
return;
}
var blend = new BLENDFUNCTION
{
BlendOp = AcSrcOver,
BlendFlags = 0,
SourceConstantAlpha = 255,
AlphaFormat = AcSrcAlpha
};
var ulwi = new UPDATELAYEREDWINDOWINFO
{
cbSize = Marshal.SizeOf(typeof(UPDATELAYEREDWINDOWINFO)),
hdcDst = _screenDC,
pptDst = &newLocation,
psize = &newSize,
hdcSrc = _memDC,
pptSrc = &zeroPoint,
//crKey = new COLORREF(0),
pblend = &blend,
dwFlags = BlendFlags.ULW_ALPHA,
prcDirty = null
};
User32.UpdateLayeredWindowIndirect(Handle, ref ulwi);
_lastUpdateHeight = rect.Height;
_lastUpdateWidth = rect.Width;
}
}
public static extern bool UpdateLayeredWindowIndirect(IntPtr hwnd, ref UPDATELAYEREDWINDOWINFO pULWInfo);
protected override void OnPaint(CefBrowser browser, CefPaintElementType type, CefRectangle[] dirtyRects, IntPtr buffer, int width, int height)
{
if (width <= 0 || height <= 0)
{
return;
}
var handle = _owner.HostWindowHandle;
CreateDeviceResource();
_renderTarget.BeginDraw();
if (type == CefPaintElementType.View)
{
var bmp = _renderTarget.CreateBitmap(new Vortice.Mathematics.Size(width, height), buffer, width * 4, new BitmapProperties(new PixelFormat(Vortice.DXGI.Format.B8G8R8A8_UNorm, AlphaMode.Premultiplied)));
if (!_isPopupShown)
{
_renderTarget.Clear(Color.Transparent);
}
_renderTarget.DrawBitmap(bmp);
bmp.Dispose();
}
else if (type == CefPaintElementType.Popup)
{
var bmp = _renderTarget.CreateBitmap(new Vortice.Mathematics.Size(width, height), buffer, width * 4, new BitmapProperties(new PixelFormat(Vortice.DXGI.Format.B8G8R8A8_UNorm, AlphaMode.Premultiplied)));
if (_cachedPopupImage != null)
{
_cachedPopupImage.Dispose();
_cachedPopupImage = null;
GC.Collect();
}
_cachedPopupImage = _renderTarget.CreateSharedBitmap(bmp, new BitmapProperties
{
PixelFormat = new PixelFormat(Vortice.DXGI.Format.B8G8R8A8_UNorm, AlphaMode.Premultiplied)
});
bmp.Dispose();
}
if (_cachedPopupImage != null && _isPopupShown && _popupRect.HasValue)
{
var scaleFactor = DpiHelper.GetScaleFactorForCurrentWindow(_owner.HostWindowHandle);
var x = _popupRect.Value.X * scaleFactor;
var y = _popupRect.Value.Y * scaleFactor;
var popupWidth = _popupRect.Value.Width * scaleFactor;
var popupHeight = _popupRect.Value.Height * scaleFactor;
var right = x + popupWidth;
var bottom = y + popupHeight;
_renderTarget.DrawBitmap(_cachedPopupImage, new Vortice.RawRectF(x, y, right, bottom), 1f, BitmapInterpolationMode.Linear, new Vortice.RawRectF(0, 0, popupWidth, popupHeight));
}
if (_renderTarget.EndDraw().Failure)
{
DiscardDeviceResources();
}
unsafe
{
var rect = new RECT();
User32.GetWindowRect(handle, ref rect);
var newLocation = new POINT(rect.left, rect.top);
var newSize = new SIZE(rect.Width, rect.Height);
var zeroPoint = new POINT(0, 0);
if (rect.Width == 0 || rect.Height == 0)
{
return;
}
var blend = new BLENDFUNCTION
{
BlendOp = AcSrcOver,
BlendFlags = 0,
SourceConstantAlpha = 255,
AlphaFormat = AcSrcAlpha
};
var ulwi = new UPDATELAYEREDWINDOWINFO
{
cbSize = Marshal.SizeOf(typeof(UPDATELAYEREDWINDOWINFO)),
hdcDst = _screenDC,
pptDst = &newLocation,
psize = &newSize,
hdcSrc = _memDC,
pptSrc = &zeroPoint,
//crKey = new COLORREF(0),
pblend = &blend,
dwFlags = BlendFlags.ULW_ALPHA,
prcDirty = null
};
User32.UpdateLayeredWindowIndirect(_owner.HostWindowHandle, ref ulwi);
}
GC.Collect();
}
public static extern bool UpdateLayeredWindowIndirect(IntPtr hwnd, ref UPDATELAYEREDWINDOWINFO pULWInfo);
public static extern BOOL UpdateLayeredWindowIndirect(HWND hwnd, UPDATELAYEREDWINDOWINFO pULWInfo);
internal static extern bool UpdateLayeredWindowIndirect(IntPtr hwnd, ref UPDATELAYEREDWINDOWINFO ulwi);