通过

BITMASKS

  • 项目
 
Microsoft DirectShow 9.0

BITMASKS

The BITMASKS macro retrieves the color masks from a VIDEOINFO structure.

Syntax

  BITMASKS(
  pbmi
  )

Parameters

pbmi

Pointer to a VIDEOINFO structure. 

Return Value

Returns a DWORD pointer value that is the address of the dwBitMasks member of the VIDEOINFO structure.

Remarks

This macro calculates the address as an offset from the start of the BITMAPINFOHEADER structure, using the value of bmiHeader.biSize. Make sure to initialize the VIDEOINFO structure before calling this macro.

Example Code

VIDEOINFO *pVi;
/* Initialize pVi (not shown). */
DWORD dwRed   = BITMASKS(pVi)[iRED], 
      dwGreen = BITMASKS(pVi)[iGREEN], 
      dwBlue  = BITMASKS(pVi)[iBLUE];

Requirements

**  Header:** Declared in Amvideo.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also