Re: [1/2] ole32: Accept TYMED_FILE as a possible source of CF_METAFILEPICT format.

[Huw Davies]

B1;2cOn Fri, Oct 23, 2015 at 06:32:17PM +0800, Dmitry Timoshkov wrote:
> diff --git a/dlls/ole32/datacache.c b/dlls/ole32/datacache.c
> index caabd10..3db0edf 100644
> --- a/dlls/ole32/datacache.c
> +++ b/dlls/ole32/datacache.c
> @@ -285,7 +285,7 @@ static DataCacheEntry *DataCache_GetEntryForFormatEtc(DataCache *This, const FOR
>  static HRESULT check_valid_clipformat_and_tymed(CLIPFORMAT cfFormat, DWORD tymed)
>  {
>      if (!cfFormat || !tymed ||
> -
>    (cfFormat == CF_METAFILEPICT && tymed == TYMED_MFPICT) ||
> -
>    (cfFormat == CF_METAFILEPICT && (tymed == TYMED_MFPICT || tymed == TYMED_FILE)) ||
>    (cfFormat == CF_BITMAP && tymed == TYMED_GDI) ||
>    (cfFormat == CF_DIB && tymed == TYMED_HGLOBAL) ||
>    (cfFormat == CF_ENHMETAFILE && tymed == TYMED_ENHMF))

This should be easy enough to test.  Create a stand-alone data cache
( using CreateDataCache() ), then call IOleCache_Cache with the
relevant fmtetc.

Huw.

[1/2] ole32: Accept TYMED_FILE as a possible source of CF_METAFILEPICT format.

[Dmitry Timoshkov]

Huw Davies  wrote:
> > diff --git a/dlls/ole32/datacache.c b/dlls/ole32/datacache.c
> > index caabd10..3db0edf 100644
> > --- a/dlls/ole32/datacache.c
> > +++ b/dlls/ole32/datacache.c
> > @@ -285,7 +285,7 @@ static DataCacheEntry *DataCache_GetEntryForFormatEtc(DataCache *This, const FOR
> >  static HRESULT check_valid_clipformat_and_tymed(CLIPFORMAT cfFormat, DWORD tymed)
> >  {
> >      if (!cfFormat || !tymed ||
> > -
> >    (cfFormat == CF_METAFILEPICT && tymed == TYMED_MFPICT) ||
> > -
> >    (cfFormat == CF_METAFILEPICT && (tymed == TYMED_MFPICT || tymed == TYMED_FILE)) ||
> >    (cfFormat == CF_BITMAP && tymed == TYMED_GDI) ||
> >    (cfFormat == CF_DIB && tymed == TYMED_HGLOBAL) ||
> >    (cfFormat == CF_ENHMETAFILE && tymed == TYMED_ENHMF))
>
> This should be easy enough to test.  Create a stand-alone data cache
> ( using CreateDataCache() ), then call IOleCache_Cache with the
> relevant fmtetc.

Ufortunately it's not that simple. IOleCache_Cache() refuses to accept
FORMATETC for CF_METAFILEPICT with medium set to TYMED_FILE, and both
IOleCache_SetData() and IOleObject_SetData() don't accept STGMEDIUM set
to TYMED_FILE either (with properly initialized lpszFileName pointing to
a valid metafile). I have no idea how an existing storage may have medium
set to TYMED_FILE, or how to set it for testing purposes besides manually
patching the storage, any ideas?

[1/2] ole32: Accept TYMED_FILE as a possible source of CF_METAFILEPICT format.

[Huw Davies]

On 30 Oct 2015, at 06:07, Dmitry Timoshkov wrote:
> Huw Davies  wrote:
> > This should be easy enough to test.  Create a stand-alone data cache
> > ( using CreateDataCache() ), then call IOleCache_Cache with the
> > relevant fmtetc.
>
> Ufortunately it's not that simple. IOleCache_Cache() refuses to accept
> FORMATETC for CF_METAFILEPICT with medium set to TYMED_FILE, and both
> IOleCache_SetData() and IOleObject_SetData() don't accept STGMEDIUM set
> to TYMED_FILE either (with properly initialized lpszFileName pointing to
> a valid metafile). I have no idea how an existing storage may have medium
> set to TYMED_FILE, or how to set it for testing purposes besides manually
> patching the storage, any ideas?

In that case you'll have to create the stream by hand and try to load it
(and also fix your patch so that IOleCache_* don't end up accepting 
TYMED_FILE).

Huw.