IWICBitmapCodecInfo::GetPixelFormats method (wincodec.h)

Retrieves the pixel formats the codec supports.

Syntax

HRESULT GetPixelFormats(
  [in]      UINT cFormats,
  [in, out] GUID *pguidPixelFormats,
  [out]     UINT *pcActual
);

Parameters

[in] cFormats

Type: UINT

The size of the pguidPixelFormats array. Use 0 on first call to determine the needed array size.

[in, out] pguidPixelFormats

Type: GUID*

Receives the supported pixel formats. Use NULL on first call to determine needed array size.

[out] pcActual

Type: UINT*

The array size needed to retrieve all supported pixel formats.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

The usage pattern for this method is a two call process. The first call retrieves the array size needed to retrieve all the supported pixel formats by calling it with cFormats set to 0 and pguidPixelFormats set to NULL. This call sets pcActual to the array size needed. Once the needed array size is determined, a second GetPixelFormats call with pguidPixelFormats set to an array of the appropriate size will retrieve the pixel formats.

Requirements