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[NtGDI] Support Clipboard Metafile

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Fuctions that help transfer meta file data from one process to the next.
See CORE-12143.
This commit is contained in:
jimtabor 2019-05-30 16:36:33 -05:00
parent e229b3eea7
commit 268b21c2f9
1 changed files with 165 additions and 45 deletions
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210
win32ss/gdi/ntgdi/metafile.c
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@ -2,7 +2,7 @@
* PROJECT: ReactOS Win32k Subsystem
* LICENSE: GPL - See COPYING in the top level directory
* FILE: win32ss/gdi/ntgdi/metafile.c
* PURPOSE: Metafile Implementation
* PURPOSE: Metafile Implementations, Metafile Clipboard Data Xfers
* PROGRAMMERS: ...
*/
@ -13,8 +13,172 @@
#define NDEBUG
#include <debug.h>
// Need to move this to NtGdiTyp.h
#define GDITAG_TYPE_EMF 'XEFM' // EnhMetaFile
#define GDITAG_TYPE_MFP '_PFM' // MetaFile Picture
// Internal Use
typedef struct _METATYPEOBJ
{
BASEOBJECT BaseObject;
DWORD iType;
DWORD mm;
DWORD xExt;
DWORD yExt;
ULONG cjData;
PBYTE pjData[4];
} METATYPEOBJ, *PMETATYPEOBJ;
//
// Plug Me in Somewhere? Clipboard cleanup?
//
VOID
FASTCALL
METATYPEOBJ__vCleanup(PVOID ObjectBody)
{
PMETATYPEOBJ pmto = (PMETATYPEOBJ)ObjectBody;
GDIOBJ_hInsertObject(&pmto->BaseObject, GDI_OBJ_HMGR_POWNED);
GDIOBJ_vDeleteObject(&pmto->BaseObject);
}
/* System Service Calls ******************************************************/
/*
* @implemented
*/
HDC
APIENTRY
NtGdiCreateMetafileDC(IN HDC hdc)
{
//if (hdc)
/* Call the internal function to create an alternative info DC */
return GreCreateCompatibleDC(hdc, TRUE);
// No HDC call NtUser.
//return UserGetDesktopDC(DCTYPE_INFO, TRUE, FALSE);
}
/*
* @implemented
*/
HANDLE
APIENTRY
NtGdiCreateServerMetaFile(
IN DWORD iType,
IN ULONG cjData,
IN PBYTE pjData,
IN DWORD mm,
IN DWORD xExt,
IN DWORD yExt
)
{
BOOL Pass = TRUE;
PMETATYPEOBJ pmto;
if ( ( iType == GDITAG_TYPE_EMF || iType == GDITAG_TYPE_MFP ) &&
cjData &&
pjData )
{
pmto = (PMETATYPEOBJ)GDIOBJ_AllocObjWithHandle(GDIObjType_META_TYPE, sizeof(METATYPEOBJ) + cjData);
if ( pmto )
{
pmto->iType = iType;
pmto->mm = mm;
pmto->xExt = xExt;
pmto->yExt = yExt;
pmto->cjData = cjData;
_SEH2_TRY
{
ProbeForRead( pjData, cjData, 1 );
RtlCopyMemory( pmto->pjData, pjData, cjData) ;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Pass = FALSE;
}
_SEH2_END;
if (Pass)
{
GDIOBJ_vSetObjectOwner(&pmto->BaseObject, GDI_OBJ_HMGR_PUBLIC);
GDIOBJ_vDereferenceObject ((POBJ)pmto);
return pmto->BaseObject.hHmgr;
}
else
{
GDIOBJ_vDeleteObject(&pmto->BaseObject);
}
}
}
return NULL;
}
/*
* @implemented
*/
ULONG
APIENTRY
NtGdiGetServerMetaFileBits(
IN HANDLE hmo,
IN ULONG cjData,
OUT OPTIONAL PBYTE pjData,
OUT PDWORD piType,
OUT PDWORD pmm,
OUT PDWORD pxExt,
OUT PDWORD pyExt
)
{
ULONG cjRet = 0;
PMETATYPEOBJ pmto;
pmto = (PMETATYPEOBJ) GDIOBJ_ShareLockObj ((HGDIOBJ) hmo, GDIObjType_META_TYPE);
if (!pmto)
return 0;
if ( pmto->iType == GDITAG_TYPE_EMF || pmto->iType == GDITAG_TYPE_MFP )
{
cjRet = pmto->cjData;
if ( cjData )
{
if (cjData == pmto->cjData)
{
_SEH2_TRY
{
ProbeForWrite( piType, sizeof(DWORD), 1);
*piType = pmto->iType;
ProbeForWrite( pmm, sizeof(DWORD), 1);
*pmm = pmto->mm;
ProbeForWrite( pxExt, sizeof(DWORD), 1);
*pxExt = pmto->xExt;
ProbeForWrite( pyExt, sizeof(DWORD), 1);
*pyExt = pmto->yExt;
ProbeForWrite( pjData, cjData, 1 );
RtlCopyMemory( pjData, pmto->pjData, cjData) ;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
cjRet = 0;
}
_SEH2_END;
}
else
{
cjRet = 0;
}
}
}
GDIOBJ_vDereferenceObject ((POBJ)pmto);
return cjRet;
}
/*
* @unimplemented
*/
@ -27,48 +191,4 @@ NtGdiConvertMetafileRect(IN HDC hDC,
return 0;
}
/*
* @implemented
*/
HDC
APIENTRY
NtGdiCreateMetafileDC(IN HDC hdc)
{
/* Call the internal function to create an alternative info DC */
return GreCreateCompatibleDC(hdc, TRUE);
}
/*
* @unimplemented
*/
HANDLE
APIENTRY
NtGdiCreateServerMetaFile(IN DWORD iType,
IN ULONG cjData,
IN PBYTE pjData,
IN DWORD mm,
IN DWORD xExt,
IN DWORD yExt)
{
UNIMPLEMENTED;
return NULL;
}
/*
* @unimplemented
*/
ULONG
APIENTRY
NtGdiGetServerMetaFileBits(IN HANDLE hmo,
IN ULONG cjData,
OUT OPTIONAL PBYTE pjData,
OUT PDWORD piType,
OUT PDWORD pmm,
OUT PDWORD pxExt,
OUT PDWORD pyExt)
{
UNIMPLEMENTED;
return 0;
}
/* EOF */