136 lines
2.8 KiB
C++
136 lines
2.8 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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Simply3D.cpp
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Abstract:
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From Tomislav Markoc:
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MSPaint calls OleGetClipboard to get IDataObject interface and then
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calls IDataObject::GetData. This call gets marshaled to Simply 3D
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GetData.
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FORMATETC looks like:
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cfFormat=8(CF_DIB) or 2(CF_BITMAP)
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ptd=0
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dwAspect=1
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lindex= -1
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tymed=1(TYMED_HGLOBAL) or 16(TYMED_GDI)
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Simply 3D returns STGMEDIUM:
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tymed=0 //WRONG
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hBitmap=hGlobal=some handle !=0
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pUnkForRelease=0
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STGMEDIUM::tymed should be changed with something like this:
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if (STGMEDIUM::tymed==0 && STGMEDIUM::hBitmap &&
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(FORMATETC::tymed==TYMED_HGLOBAL || FORMATETC::tymed==TYMED_GDI))
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STGMEDIUM::tymed=FORMATETC::tymed;
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Notes:
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This is an app specific shim.
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History:
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02/22/2000 linstev Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(Simply3D)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(OleSetClipboard)
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APIHOOK_ENUM_ENTRY_COMSERVER(OLE32)
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APIHOOK_ENUM_END
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IMPLEMENT_COMSERVER_HOOK(OLE32)
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#define CLSID_DataObject IID_IDataObject
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typedef HRESULT (*_pfn_IDataObject_GetData)(PVOID pThis, FORMATETC *pFormatetc, STGMEDIUM *pmedium);
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typedef HRESULT (*_pfn_OleSetClipboard)(IDataObject * pDataObj);
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/*++
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Hook OleSetClipboard to hook the object.
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--*/
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HRESULT
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APIHOOK(OleSetClipboard)(
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IDataObject *pDataObj
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)
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{
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HRESULT hReturn = ORIGINAL_API(OleSetClipboard)(pDataObj);
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if (hReturn == NOERROR) {
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HookObject(
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NULL,
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IID_IDataObject,
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(PVOID *) &pDataObj,
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NULL,
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FALSE);
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}
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return hReturn;
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}
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/*++
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Hook GetData and correct the return values as
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--*/
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HRESULT
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COMHOOK(IDataObject, GetData)(
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PVOID pThis,
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FORMATETC *pFormatetc,
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STGMEDIUM *pmedium
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)
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{
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HRESULT hrReturn = E_FAIL;
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_pfn_IDataObject_GetData pfnOld =
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ORIGINAL_COM(IDataObject, GetData, pThis);
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if (pfnOld) {
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hrReturn = (*pfnOld)(pThis, pFormatetc, pmedium);
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if (!pmedium->tymed && pmedium->hBitmap &&
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((pFormatetc->tymed == TYMED_HGLOBAL) ||
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(pFormatetc->tymed == TYMED_GDI))) {
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LOGN( eDbgLevelError, "[IDataObject_GetData] fixing tymed parameter");
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pmedium->tymed = pFormatetc->tymed;
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}
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}
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return hrReturn;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY_COMSERVER(OLE32)
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APIHOOK_ENTRY(OLE32.DLL, OleSetClipboard)
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COMHOOK_ENTRY(DataObject, IDataObject, GetData, 3)
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HOOK_END
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IMPLEMENT_SHIM_END
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