IMVBitmapOverlay 

The IMVBitmapOverlay interface contains methods and properties to configure the MV Bitmap Overlay filter.

Methods:

Header file: IMVBitmapOverlay.h
Interface definition language file: IMVBitmapOverlay.idl
Typelib: MVBitmapOverlay
Interface ID: IID_IMVBitmapOverlay

Property IMVBitmapOverlay::AspectRatio

Declaration: Property Get/Put AspectRatio As Boolean

Aspect ratio.

C Prototype:

HRESULT put_AspectRatio(VARIANT_BOOL newVal);
HRESULT get_AspectRatio(VARIANT_BOOL *pVal);

Property IMVBitmapOverlay::BitmapPath

Declaration: Property Get/Put BitmapPath As String

Overlay bitmap path.

C Prototype:HRESULT put_BitmapPath(BSTR newVal);
HRESULT get_BitmapPath(BSTR *pVal);

Property IMVBitmapOverlay::Enabled

Declaration: Property Get/Put Enabled As Boolean

Enable bitmap overlay.

C Prototype:

HRESULT put_Enabled(VARIANT_BOOL newVal);
HRESULT get_Enabled(VARIANT_BOOL *pVal);

Property IMVBitmapOverlay::InputAlpha

Declaration: Property Get/Put InputAlpha As Long

Alpha value for video. Range from 0 (full overlay) to 255 (no overlay).

C Prototype:

HRESULT put_InputAlpha(LONG newVal);
HRESULT get_InputAlpha(LONG *pVal);

Property IMVBitmapOverlay::Mode

Declaration: Property Get/Put Mode As Long

Mode: alpha blending, transparency or both of them.

Mode	Value	Description
MV_GDI_OVERLAY_TRANSPARENT	0	The all pixel from the bitmap with TransparentColour property color are transparent. They shows the underlying video stream.
MV_GDI_OVERLAY_CONSTANTALPHA	1	The video stream and the overlay bitmap was added with an alpa value.
MV_GDI_OVERLAY_TRANSPARENT_AND_CONSTANTALPHA	2	Both overlay modes was applied to the video stream, first MV_GDI_OVERLAY_TRANSPARENT and then MV_GDI_OVERLAY_CONSTANTALPHA.
MV_GDI_OVERLAY_USE_ALPHA_CHANNEL	3	Use the alpha channel from the overlay image if available or use an alpha channel bitmap from the IMVBitmapOverlay2::AlphaBitmapPath property.

C Prototype:

HRESULT put_Mode(LONG newVal);
HRESULT get_Mode(LONG *pVal);

Property IMVBitmapOverlay::OriginalHeight

Declaration: Property Get OriginalHeight As Long

Overlay bitmap original height.

C Prototype:

HRESULT put_OriginalHeight(LONG newVal);
HRESULT get_OriginalHeight(LONG *pVal);

Property IMVBitmapOverlay::OriginalWidth

Declaration: Property Get OriginalWidth As Long

Overlay bitmap original width.

C Prototype:

HRESULT put_OriginalWidth(LONG newVal);
HRESULT get_OriginalWidth(LONG *pVal);

Property IMVBitmapOverlay::PositionMode

Declaration: Property Get/Put PositionMode As Long

Position mode, absolute or relative.

C Prototype:

HRESULT put_PositionMode(LONG newVal);
HRESULT get_PositionMode(LONG *pVal);

Property IMVBitmapOverlay::RelativePosition

Declaration: Property Get/Put RelativePosition As Long

Relative position.

C Prototype:

HRESULT put_RelativePosition(LONG newVal);
HRESULT get_RelativePosition(LONG *pVal);

Property IMVBitmapOverlay::ResizeEnabled

Declaration: Property Get/Put ResizeEnabled As Boolean

Enable resizing.

C Prototype:

HRESULT put_ResizeEnabled(VARIANT_BOOL newVal);
HRESULT get_ResizeEnabled(VARIANT_BOOL *pVal);

Property IMVBitmapOverlay::ResizeHeight

Declaration: Property Get/Put ResizeHeight As Long

Overlay bitmap resized height.

C Prototype:

HRESULT put_ResizeHeight(LONG newVal);
HRESULT get_ResizeHeight(LONG *pVal);

Property IMVBitmapOverlay::ResizeWidth

Declaration: Property Get/Put ResizeWidth As Long

Overlay bitmap resized width.

C Prototype:

HRESULT put_ResizeWidth(LONG newVal);
HRESULT get_ResizeWidth(LONG *pVal);

Property IMVBitmapOverlay::TransparentColour

Declaration: Property Get/Put TransparentColour As Long

Transparent colour.

C Prototype:

HRESULT put_TransparentColour(LONG newVal);
HRESULT get_TransparentColour(LONG *pVal);

Property IMVBitmapOverlay::XPosition

Declaration: Property Get/Put XPosition As Long

Horizontal position.

C Prototype:

HRESULT put_XPosition(LONG newVal);
HRESULT get_XPosition(LONG *pVal);

Property IMVBitmapOverlay::YPosition

Declaration: Property Get/Put YPosition As Long

Vertical position.

C Prototype:

HRESULT put_YPosition(LONG newVal);
HRESULT get_YPosition(LONG *pVal);