IWICBitmapCodecInfo::GetFileExtensions method

Retrieves a comma delimited list of the file name extensions associated with the codec.

Syntax

HRESULT GetFileExtensions(
  [in]              UINT  cchFileExtensions,
  [in, out, unique] WCHAR *wzFileExtensions,
  [in, out, unique] UINT  *pcchActual
);

Parameters

cchFileExtensions [in]

Type: UINT

The size of the file name extension buffer. Use 0 on first call to determine needed buffer size.

wzFileExtensions [in, out]

Type: WCHAR*

Receives a comma delimited list of file name extensions associated with the codec. Use NULL on first call to determine needed buffer size.

pcchActual [in, out]

Type: UINT*

The actual buffer size needed to retrieve all file name extensions associated with the codec.

Return value

Type: HRESULT

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

Remarks

The default extension for an image encoder is the first item in the list of returned extensions.

The usage pattern for this method is a two call process. The first call retrieves the buffer size needed to retrieve the full color management version number by calling it with cchFileExtensions set to 0 and wzFileExtensions set to NULL. This call sets pcchActual to the buffer size needed. Once the needed buffer size is determined, a second GetFileExtensions call with cchFileExtensions set to the buffer size and wzFileExtensions set to a buffer of the appropriate size will retrieve the pixel formats.

Requirements