ole32: Load cached data in the data cache into a STGMEDIUM type so it can be treated the same as set data.
This commit is contained in:
Rob Shearman
Alexandre Julliard
parent
4232d31c57
commit
25d7d95035
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@ -92,6 +92,9 @@ typedef struct DataCacheEntry
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/* format of this entry */
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FORMATETC fmtetc;
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/* cached data */
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STGMEDIUM stgmedium;
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/*
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* This storage pointer is set through a call to
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* IPersistStorage_Load. This is where the visual
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@ -139,7 +142,7 @@ struct DataCache
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struct list cache_list;
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/* last id assigned to an object */
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/* last id assigned to an entry */
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DWORD last_cache_id;
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};
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@ -197,6 +200,7 @@ static void DataCacheEntry_Destroy(DataCacheEntry *This)
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if (This->storage)
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IStorage_Release(This->storage);
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HeapFree(GetProcessHeap(), 0, This->fmtetc.ptd);
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ReleaseStgMedium(&This->stgmedium);
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HeapFree(GetProcessHeap(), 0, This);
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}
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@ -240,73 +244,23 @@ static DataCacheEntry *DataCache_GetEntryForFormatEtc(DataCache *This, const FOR
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static HRESULT DataCache_CreateEntry(DataCache *This, const FORMATETC *formatetc, DataCacheEntry **cache_entry)
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{
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*cache_entry = HeapAlloc(GetProcessHeap(), 0, sizeof(**cache_entry));
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if (!*cache_entry)
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return E_OUTOFMEMORY;
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(*cache_entry)->fmtetc = *formatetc;
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if (formatetc->ptd)
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{
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(*cache_entry)->fmtetc.ptd = HeapAlloc(GetProcessHeap(), 0, formatetc->ptd->tdSize);
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memcpy((*cache_entry)->fmtetc.ptd, formatetc->ptd, formatetc->ptd->tdSize);
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}
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(*cache_entry)->stgmedium.tymed = TYMED_NULL;
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(*cache_entry)->stgmedium.pUnkForRelease = NULL;
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(*cache_entry)->storage = NULL;
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(*cache_entry)->id = This->last_cache_id++;
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list_add_tail(&This->cache_list, &(*cache_entry)->entry);
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return S_OK;
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}
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/************************************************************************
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* DataCache_ReadPresentationData
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*
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* This method will read information for the requested presentation
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* into the given structure.
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*
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* Param:
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* this - Pointer to the DataCache object
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* cache_entry - The entry that we wish to draw.
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* header - The structure containing information about this
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* aspect of the object.
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*/
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static HRESULT DataCache_ReadPresentationData(
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DataCache* this,
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DataCacheEntry* cache_entry,
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PresentationDataHeader* header)
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{
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IStream* presStream = NULL;
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HRESULT hres;
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/*
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* Open the presentation stream.
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*/
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hres = DataCacheEntry_OpenPresStream(
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cache_entry,
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&presStream);
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if (FAILED(hres))
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return hres;
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/*
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* Read the header.
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*/
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hres = IStream_Read(
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presStream,
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header,
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sizeof(PresentationDataHeader),
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NULL);
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/*
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* Cleanup.
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*/
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IStream_Release(presStream);
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/*
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* We don't want to propagate any other error
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* code than a failure.
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*/
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if (hres!=S_OK)
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hres = E_FAIL;
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return hres;
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}
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/************************************************************************
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* DataCache_FireOnViewChange
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*
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@ -454,39 +408,37 @@ static HRESULT DataCacheEntry_OpenPresStream(
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}
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/************************************************************************
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* DataCache_ReadPresMetafile
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* DataCacheEntry_LoadData
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*
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* This method will read information for the requested presentation
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* into the given structure.
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*
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* Param:
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* this - Pointer to the DataCache object
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* cache_entry - The entry that we wish to draw.
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* This - The entry to load the data from.
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*
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* Returns:
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* This method returns a metafile handle if it is successful.
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* it will return 0 if not.
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*/
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static HMETAFILE DataCache_ReadPresMetafile(
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DataCache* this,
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DataCacheEntry *cache_entry)
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static HRESULT DataCacheEntry_LoadData(DataCacheEntry *This)
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{
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LARGE_INTEGER offset;
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IStream* presStream = NULL;
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HRESULT hres;
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void* metafileBits;
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STATSTG streamInfo;
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HMETAFILE newMetafile = 0;
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void* metafileBits;
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METAFILEPICT *mfpict;
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HGLOBAL hmfpict;
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PresentationDataHeader header;
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/*
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* Open the presentation stream.
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*/
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hres = DataCacheEntry_OpenPresStream(
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cache_entry,
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This,
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&presStream);
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if (FAILED(hres))
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return (HMETAFILE)hres;
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return hres;
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/*
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* Get the size of the stream.
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@ -496,18 +448,24 @@ static HMETAFILE DataCache_ReadPresMetafile(
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STATFLAG_NONAME);
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/*
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* Skip the header
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* Read the header.
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*/
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offset.u.HighPart = 0;
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offset.u.LowPart = sizeof(PresentationDataHeader);
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hres = IStream_Seek(
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presStream,
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offset,
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STREAM_SEEK_SET,
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NULL);
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hres = IStream_Read(
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presStream,
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&header,
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sizeof(PresentationDataHeader),
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NULL);
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streamInfo.cbSize.u.LowPart -= offset.u.LowPart;
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streamInfo.cbSize.QuadPart -= sizeof(PresentationDataHeader);
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hmfpict = GlobalAlloc(GMEM_MOVEABLE, sizeof(METAFILEPICT));
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if (!hmfpict)
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{
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IStream_Release(presStream);
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return E_OUTOFMEMORY;
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}
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mfpict = GlobalLock(hmfpict);
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/*
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* Allocate a buffer for the metafile bits.
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@ -530,19 +488,31 @@ static HMETAFILE DataCache_ReadPresMetafile(
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*/
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if (SUCCEEDED(hres))
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{
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newMetafile = SetMetaFileBitsEx(streamInfo.cbSize.u.LowPart, metafileBits);
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/* FIXME: get this from the stream */
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mfpict->mm = MM_ANISOTROPIC;
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mfpict->xExt = header.dwObjectExtentX;
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mfpict->yExt = header.dwObjectExtentY;
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mfpict->hMF = SetMetaFileBitsEx(streamInfo.cbSize.u.LowPart, metafileBits);
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if (!mfpict->hMF)
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hres = E_FAIL;
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}
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GlobalUnlock(hmfpict);
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if (SUCCEEDED(hres))
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{
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This->stgmedium.tymed = TYMED_MFPICT;
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This->stgmedium.u.hMetaFilePict = hmfpict;
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}
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else
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GlobalFree(hmfpict);
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/*
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* Cleanup.
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*/
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HeapFree(GetProcessHeap(), 0, metafileBits);
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IStream_Release(presStream);
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if (newMetafile==0)
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hres = E_FAIL;
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return newMetafile;
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return hres;
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}
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/*********************************************************
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@ -1121,6 +1091,7 @@ static HRESULT WINAPI DataCache_Load(
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hr = DataCache_CreateEntry(This, &fmtetc, &cache_entry);
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if (SUCCEEDED(hr))
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{
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ReleaseStgMedium(&cache_entry->stgmedium);
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if (cache_entry->storage) IStorage_Release(cache_entry->storage);
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cache_entry->storage = pStg;
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IStorage_AddRef(pStg);
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@ -1296,8 +1267,6 @@ static HRESULT WINAPI DataCache_Draw(
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ULONG_PTR dwContinue)
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{
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DataCache *This = impl_from_IViewObject2(iface);
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PresentationDataHeader presData;
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HMETAFILE presMetafile = 0;
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HRESULT hres;
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DataCacheEntry *cache_entry;
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@ -1326,76 +1295,77 @@ static HRESULT WINAPI DataCache_Draw(
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(cache_entry->fmtetc.lindex != lindex))
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continue;
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/*
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* First, we need to retrieve the dimensions of the
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* image in the metafile.
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*/
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hres = DataCache_ReadPresentationData(This,
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cache_entry,
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&presData);
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if (FAILED(hres))
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return hres;
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/*
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* Then, we can extract the metafile itself from the cached
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* data.
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*
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* FIXME Unless it isn't a metafile. I think it could be any CF_XXX type,
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* particularly CF_DIB.
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*/
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presMetafile = DataCache_ReadPresMetafile(This,
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cache_entry);
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/*
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* If we have a metafile, just draw baby...
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* We have to be careful not to modify the state of the
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* DC.
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*/
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if (presMetafile!=0)
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/* if the data hasn't been loaded yet, do it now */
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if ((cache_entry->stgmedium.tymed == TYMED_NULL) && cache_entry->storage)
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{
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INT prevMapMode = SetMapMode(hdcDraw, MM_ANISOTROPIC);
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SIZE oldWindowExt;
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SIZE oldViewportExt;
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POINT oldViewportOrg;
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SetWindowExtEx(hdcDraw,
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presData.dwObjectExtentX,
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presData.dwObjectExtentY,
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&oldWindowExt);
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SetViewportExtEx(hdcDraw,
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lprcBounds->right - lprcBounds->left,
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lprcBounds->bottom - lprcBounds->top,
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&oldViewportExt);
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SetViewportOrgEx(hdcDraw,
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lprcBounds->left,
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lprcBounds->top,
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&oldViewportOrg);
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PlayMetaFile(hdcDraw, presMetafile);
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SetWindowExtEx(hdcDraw,
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oldWindowExt.cx,
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oldWindowExt.cy,
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NULL);
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SetViewportExtEx(hdcDraw,
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oldViewportExt.cx,
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oldViewportExt.cy,
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NULL);
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SetViewportOrgEx(hdcDraw,
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oldViewportOrg.x,
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oldViewportOrg.y,
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NULL);
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SetMapMode(hdcDraw, prevMapMode);
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DeleteMetaFile(presMetafile);
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hres = DataCacheEntry_LoadData(cache_entry);
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if (FAILED(hres))
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continue;
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}
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/* no data */
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if (cache_entry->stgmedium.tymed == TYMED_NULL)
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continue;
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switch (cache_entry->fmtetc.cfFormat)
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{
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case CF_METAFILEPICT:
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{
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/*
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* We have to be careful not to modify the state of the
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* DC.
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*/
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INT prevMapMode;
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SIZE oldWindowExt;
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SIZE oldViewportExt;
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POINT oldViewportOrg;
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METAFILEPICT *mfpict;
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if ((cache_entry->stgmedium.tymed != TYMED_MFPICT) ||
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!((mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict))))
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continue;
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prevMapMode = SetMapMode(hdcDraw, mfpict->mm);
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SetWindowExtEx(hdcDraw,
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mfpict->xExt,
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mfpict->yExt,
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&oldWindowExt);
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SetViewportExtEx(hdcDraw,
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lprcBounds->right - lprcBounds->left,
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lprcBounds->bottom - lprcBounds->top,
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&oldViewportExt);
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SetViewportOrgEx(hdcDraw,
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lprcBounds->left,
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lprcBounds->top,
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&oldViewportOrg);
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PlayMetaFile(hdcDraw, mfpict->hMF);
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SetWindowExtEx(hdcDraw,
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oldWindowExt.cx,
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oldWindowExt.cy,
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NULL);
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SetViewportExtEx(hdcDraw,
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oldViewportExt.cx,
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oldViewportExt.cy,
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NULL);
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SetViewportOrgEx(hdcDraw,
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oldViewportOrg.x,
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oldViewportOrg.y,
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NULL);
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SetMapMode(hdcDraw, prevMapMode);
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GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
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return S_OK;
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}
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}
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return S_OK;
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}
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return OLE_E_BLANK;
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@ -1542,7 +1512,6 @@ static HRESULT WINAPI DataCache_GetExtent(
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LPSIZEL lpsizel)
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{
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DataCache *This = impl_from_IViewObject2(iface);
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PresentationDataHeader presData;
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HRESULT hres = E_FAIL;
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DataCacheEntry *cache_entry;
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@ -1581,20 +1550,36 @@ static HRESULT WINAPI DataCache_GetExtent(
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(cache_entry->fmtetc.lindex != lindex))
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continue;
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/*
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* Get the presentation information from the
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* cache.
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*/
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hres = DataCache_ReadPresentationData(This,
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cache_entry,
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&presData);
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if (SUCCEEDED(hres))
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/* if the data hasn't been loaded yet, do it now */
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if ((cache_entry->stgmedium.tymed == TYMED_NULL) && cache_entry->storage)
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{
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lpsizel->cx = presData.dwObjectExtentX;
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lpsizel->cy = presData.dwObjectExtentY;
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hres = DataCacheEntry_LoadData(cache_entry);
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if (FAILED(hres))
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continue;
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}
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return S_OK;
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/* no data */
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if (cache_entry->stgmedium.tymed == TYMED_NULL)
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continue;
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switch (cache_entry->fmtetc.cfFormat)
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{
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case CF_METAFILEPICT:
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{
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METAFILEPICT *mfpict;
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if ((cache_entry->stgmedium.tymed != TYMED_MFPICT) ||
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!((mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict))))
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continue;
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lpsizel->cx = mfpict->xExt;
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lpsizel->cy = mfpict->yExt;
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GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
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return S_OK;
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}
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}
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}
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