This topic documents a feature of Visual Filters and Transitions, which is deprecated as of Windows Internet Explorer 9 and obsolete as of Internet Explorer 10.
Called by the base class to cause a transform to produce its output.
virtual HRESULT OnExecute( const GUID *pRequestID, const DXBNDS *pClipBnds, const DXVEC *pPlacement ) = 0;
- [in] Pointer to the ID passed into the IDXTransform::Execute method by the caller. This ID should be passed to the task manager if CDXBaseNTo1::OnExecute schedules any asynchronous work through the task manager. Otherwise, this parameter should be ignored.
- [in] Pointer to the portion of the transform output space that should be rendered. If NULL, the entire output space is rendered. If a transform can't produce the specified region of the result, the transform should mask off the DXTMF_BOUNDS_SUPPORTED flag from the m_dwMiscFlags data member in the Active Template Library (ATL) CComObjectRootEx::FinalConstruct constructor method. Image transforms must be able to render regions of their output.
- [in] Pointer to the position to place the result in the output coordinate space. If the transform does not support this capability, it should mask off the DXTMF_PLACEMENT_SUPPORTED flag from the m_dwMiscFlags data member in the FinalConstruct constructor method.
Returns S_OK or an implementation-dependent error code.
Typically, This function can be called for 2-D transforms if the m_ulMaxImageBands data member is set to zero in the FinalConstruct constructor method.