MFVideoAlphaBitmap structure (evr9.h)

[The component described on this page, Enhanced Video Renderer, is a legacy feature. It has been superseded by the Simple Video Renderer (SVR) exposed through the MediaPlayer and IMFMediaEngine components. To play video content you should send data into one of these components and allow them to instantiate the new video renderer. These components have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer or the lower level IMFMediaEngine APIs to play video media in Windows instead of the EVR, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

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.

pDDs

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

bitmap.hdc

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

bitmap.pDDS

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

See also

Enhanced Video Renderer

IMFVideoMixerBitmap::SetAlphaBitmap

Media Foundation Structures