ole32: Obtain stream size regardless of current position.

Use STREAM_SEEK_END when attempting to determine the size of a stream that clipboard data has just been rendered into. This corrects an issue with Office 2016 where the current position of the stream is 0 while rendering a target of image/png. Signed-off-by: Micah N Gorrell <mgorrell@codeweavers.com> Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

ole32: Obtain stream size regardless of current position.
e08eb410 · Micah N Gorrell · Alexandre Julliard · 404cee2a · e08eb410
Commit e08eb410 authored Nov 07, 2019 by Micah N Gorrell Committed by Alexandre Julliard Nov 08, 2019
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clipboard.c dlls/ole32/clipboard.c +1 -1

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--- a/dlls/ole32/clipboard.c
+++ b/dlls/ole32/clipboard.c
@@ -788,7 +788,7 @@ static HRESULT get_data_from_stream(IDataObject *data, FORMATETC *fmt, HGLOBAL *
        if(FAILED(hr)) goto error;

        offs.QuadPart = 0;
-        IStream_Seek(med.u.pstm, offs, STREAM_SEEK_CUR, &pos);
+        IStream_Seek(med.u.pstm, offs, STREAM_SEEK_END, &pos);
        IStream_Seek(med.u.pstm, offs, STREAM_SEEK_SET, NULL);
        hr = IStream_CopyTo(med.u.pstm, stm, pos, NULL, NULL);
        ReleaseStgMedium(&med);