[12/18] windowscodecs: Do not assume that vtable is the first element of the object, avoid not necessary casts.

[Michael Stefaniuc]

Hello Dmitry,

On 07/24/2012 08:12 AM, Dmitry Timoshkov wrote:
> ---
>  dlls/windowscodecs/jpegformat.c | 23 +++++++++++++----------
>  1 file changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/dlls/windowscodecs/jpegformat.c b/dlls/windowscodecs/jpegformat.c
> index 53d7ec4..2c77d4f 100644
> --- a/dlls/windowscodecs/jpegformat.c
> +++ b/dlls/windowscodecs/jpegformat.c
> @@ -469,6 +470,8 @@ static const IWICBitmapDecoderVtbl JpegDecoder_Vtbl = {
>  static HRESULT WINAPI JpegDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
>      void **ppv)
>  {
> +    JpegDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
> +
>      TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
>  
>      if (!ppv) return E_INVALIDARG;
> @@ -477,7 +480,7 @@ static HRESULT WINAPI JpegDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *if
>          IsEqualIID(&IID_IWICBitmapSource, iid) ||
>          IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
>      {
> -        *ppv = iface;
> +        *ppv = &This->IWICBitmapFrameDecode_iface;
>      }
>      else
>      {
same here: not needed.

bye
	michael