[Bug 33384] Basic WPF applications using .NET 3.5 WPF fails to handle images (windowscodecs {7543696a-bc8d-46b0-5f81-8d95728972be} = IMILBitmapSource unsupported)

http://bugs.winehq.org/show_bug.cgi?id=33384

--- Comment #7 from Anastasius Focht  2013-04-14 17:11:06 CDT ---
Hello Vincent,

the method signatures and order are exactly the same so I'm wondering why this
second interface exist (solely for performance reasons?).

The definition for Wine's "wincodec.idl" would be as follows (I replaced the
GUID and CopyPalette method name):

--- snip ---
[
    object,
    uuid(7543696a-bc8d-46b0-5f81-8d95728972be)
]
interface IMILBitmapSource : IUnknown
{
    HRESULT GetSize(
        [out] UINT *puiWidth,
        [out] UINT *puiHeight);

HRESULT GetPixelFormat(
        [out] WICPixelFormatGUID *pPixelFormat);

HRESULT GetResolution(
        [out] double *pDpiX,
        [out] double *pDpiY);

HRESULT GetPalette(
        [in] IWICPalette *pIPalette);

HRESULT CopyPixels(
        [in] const WICRect *prc,
        [in] UINT cbStride,
        [in] UINT cbBufferSize,
        [out, size_is(cbBufferSize)] BYTE *pbBuffer);
}
--- snip ---

So technically if the vtable layout and method signatures are exactly the same,
we could get away by just using our BitmapImpl?

Regards