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MFVideoAlphaBitmap
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MFVideoAlphaBitmap structure

Specifies a bitmap for the enhanced video renderer (EVR) to alpha-blend with the video.

Syntax


typedef struct MFVideoAlphaBitmap {
  BOOL                     GetBitmapFromDC;
  union {
    HDC               hdc;
    IDirect3DSurface9 *pDDs;
  } bitmap;
  MFVideoAlphaBitmapParams params;
} MFVideoAlphaBitmap;

Members

GetBitmapFromDC

If TRUE, the hdc member is used. Otherwise, the pDDs member is used.

bitmap

A union that contains the following members.

hdc

Handle to the device context (DC) of a GDI bitmap. If GetBitmapFromDC is FALSE, this member is ignored.

pDDs

Pointer to the IDirect3DSurface9 interface of a Direct3D surface that contains the bitmap. If GetBitmapFromDC is TRUE, this member is ignored.

params

MFVideoAlphaBitmapParams structure that specifies the parameters for the alpha-blending operation.

Remarks

To specify a GDI bitmap, create a device context and call SelectObject to select the bitmap into the DC. Then set the hdc member of the structure equal to the handle to the DC and set the GetBitmapFromDC member to TRUE.

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Evr9.h

See also

IMFVideoMixerBitmap::SetAlphaBitmap
Media Foundation Structures
Enhanced Video Renderer

 

 

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