VMR9AlphaBitmap

The VMR9AlphaBitmap structure is used in the VMR-9's IVMRMixerBitmap9 methods when the application is providing a static alpha-blended bitmap to be displayed on the composited video frame.

Syntax

typedef struct VMR9AlphaBitmap{
  DWORD              dwFlags;
  HDC                hdc;
  IDirect3DSurface9* pDDS;
  RECT               rSrc;
  VMR9NormalizedRect rDest;
  FLOAT              fAlpha;
  COLORREF           clrSrcKey;
  DWORD              dwFilterMode;
};

Members

dwFlags

Bitwise combination of flags from the VMR9AlphaBitmapFlags enumeration type.

hdc

Specifies the handle to the device context for the bitmap. Specify NULL if the bitmap is located in a Direct3D surface.

pDDS

Direct3D surface to copy.

rSrc

Specifies the source rectangle in either the GDI device context or the DirectDraw surface.

rDest

Specifies the destination rectangle in composition space.

fAlpha

Specifies the alpha blending value; must be a value from 0.0 to 1.0 (inclusive).

clrSrcKey

Specifies the source color key.

dwFilterMode

Specifies flags from the VMRMixerPrefs enumeration, which control how the VMR mixes the image. The MixerPref_PointFiltering flag is particularly useful for images that contain text and do not need to be stretched prior to mixing.

See Also

• DirectShow Structures