ISurfaceImageSourceNativeWithD2D::BeginDraw method (windows.ui.xaml.media.dxinterop.h)
Initiates an update to the associated SurfaceImageSource or VirtualSurfaceImageSource.
Syntax
HRESULT BeginDraw(
[in] REFRECT updateRect,
[in] REFIID iid,
[out] void **updateObject,
[out] POINT *offset
);
Parameters
[in] updateRect
The region of the surface that will be drawn into.
[in] iid
IID used to lookup the object for drawing.
[out] updateObject
Receives a COM pointer to the drawing object. Based on iid, this may be either an IDXGISurface, when not using batched drawing, or a shared ID2D1DeviceContext, when using batched Direct2D drawing to improve performance when updating Direct2D content across multiple surfaces.
[out] offset
Receives the point (x,y) offset of the surface that will be drawn into.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8.1 [desktop apps | UWP apps] |
| Minimum supported server | Windows Server 2012 R2 [desktop apps | UWP apps] |
| Target Platform | Windows |
| Header | windows.ui.xaml.media.dxinterop.h |
| DLL | Windows.UI.Xaml.dll |