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Apply Alex patch to dc.c NtGdiExtGetObject.

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svn path=/trunk/; revision=26510
This commit is contained in:
James Tabor 2007-04-26 03:25:42 +00:00
parent 5610a60b73
commit cd5a11a313
1 changed files with 92 additions and 59 deletions
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151
reactos/subsystems/win32/win32k/objects/dc.c
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@ -1753,9 +1753,11 @@ NtGdiGetDeviceCaps(HDC hDC,
DC_GET_VAL( INT, NtGdiGetMapMode, w.MapMode )
DC_GET_VAL( INT, NtGdiGetPolyFillMode, w.polyFillMode )
INT FASTCALL
IntGdiGetObject(HANDLE Handle, INT cbCount, LPVOID lpBuffer)
INT
FASTCALL
IntGdiGetObject(IN HANDLE Handle,
IN INT cbCount,
IN LPVOID lpBuffer)
{
PVOID pGdiObject;
INT Result = 0;
@ -1808,71 +1810,102 @@ IntGdiGetObject(HANDLE Handle, INT cbCount, LPVOID lpBuffer)
return Result;
}
INT STDCALL
NtGdiExtGetObjectW(HANDLE hGdiObj, INT cbCount, LPVOID lpUnsafeBuf)
INT
NTAPI
NtGdiExtGetObjectW(IN HANDLE hGdiObj,
IN INT cbCount,
OUT LPVOID lpBuffer)
{
LPVOID lpSafeBuf;
NTSTATUS Status = STATUS_SUCCESS;
INT RetCount = 0;
/* From Wine: GetObject does not SetLastError() on a null object */
if (!hGdiObj)
{
return 0;
}
if (!lpUnsafeBuf)
{
return IntGdiGetObject(hGdiObj, 0, NULL);
}
if (!cbCount)
{
return 0;
}
RetCount = IntGdiGetObject(hGdiObj, cbCount, NULL);
if (!RetCount)
{
return 0;
}
if ((UINT)cbCount > RetCount)
{
cbCount = RetCount;
}
lpSafeBuf = ExAllocatePoolWithTag(PagedPool, RetCount, TAG_GDIOBJ);
if(!lpSafeBuf)
{
SetLastWin32Error(ERROR_NOT_ENOUGH_MEMORY);
return 0;
}
RetCount = IntGdiGetObject(hGdiObj, cbCount, lpSafeBuf);
if (RetCount)
{
_SEH_TRY
INT iRetCount = 0;
INT iObjectType;
INT cbRealCount = cbCount;
union
{
ProbeForWrite(lpUnsafeBuf, cbCount, 1);
RtlCopyMemory(lpUnsafeBuf, lpSafeBuf, cbCount);
}
_SEH_HANDLE
BITMAP bmpObject;
DIBSECTION disObject;
LOGPEN lgpObject;
LOGBRUSH lgbObject;
LOGFONTW lgfObject;
EXTLOGFONTW elgfObject;
} Object;
//
// Get the object type
//
iObjectType = GDIOBJ_GetObjectType(hGdiObj);
//
// Check if the given size is too large
//
if (cbCount > sizeof(Object))
{
Status = _SEH_GetExceptionCode();
//
// Normalize to the largest supported object size
//
DPRINT1("cbCount too big!\n");
cbCount = sizeof(Object);
}
_SEH_END;
}
ExFreePool(lpSafeBuf);
//
// Check if this is a brush
//
if (iObjectType == GDI_OBJECT_TYPE_BRUSH)
{
//
// Windows GDI Hack: Manually correct the size
//
cbCount = sizeof(LOGBRUSH);
}
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
return 0;
}
//
// Now do the actual call
//
iRetCount = IntGdiGetObject(hGdiObj, cbCount, lpBuffer ? &Object : NULL);
return RetCount;
//
// Check if this is a brush
//
if (iObjectType == GDI_OBJECT_TYPE_BRUSH)
{
//
// Fixup the size to account for our previous fixup
//
cbCount = min(cbCount, cbRealCount);
}
//
// Make sure we have a buffer and a return size
//
if ((iRetCount) && (lpBuffer))
{
//
// Enter SEH for buffer transfer
//
_SEH_TRY
{
//
// Probe the buffer and copy it
//
ProbeForWrite(lpBuffer, min(cbCount, cbRealCount), sizeof(WORD));
RtlCopyMemory(lpBuffer, &Object, min(cbCount, cbRealCount));
}
_SEH_HANDLE
{
//
// Clear the return value.
// Do *NOT* set last error here!
//
iRetCount = 0;
}
_SEH_END;
}
//
// Return the count
//
return iRetCount;
}
DC_GET_VAL( INT, NtGdiGetRelAbs, w.relAbsMode )
DC_GET_VAL( INT, NtGdiGetROP2, w.ROPmode )
DC_GET_VAL( INT, NtGdiGetStretchBltMode, w.stretchBltMode )