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IntSetCursor() don't BSOD in low-resource conditions

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svn path=/trunk/; revision=12214
This commit is contained in:
Royce Mitchell III 2004-12-18 23:55:26 +00:00
parent 60f819d761
commit c39a4131db
1 changed files with 10 additions and 3 deletions
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13
reactos/subsys/win32k/ntuser/cursoricon.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: cursoricon.c,v 1.2 2004/12/12 17:56:52 weiden Exp $ */
/* $Id: cursoricon.c,v 1.3 2004/12/18 23:55:26 royce Exp $ */
#include <w32k.h>
PCURICON_OBJECT FASTCALL
@ -81,8 +81,10 @@ IntSetCursor(PWINSTATION_OBJECT WinStaObject, PCURICON_OBJECT NewCursor,
DC_UnlockDc(Screen);
BitmapObj = BITMAPOBJ_LockBitmap(dcbmp);
/* FIXME - BitmapObj can be NULL!!!!! */
if ( !BitmapObj )
return (HCURSOR)0;
SurfObj = &BitmapObj->SurfObj;
ASSERT(SurfObj);
}
if (!NewCursor && (CurInfo->CurrentCursorObject || ForceChange))
@ -164,7 +166,12 @@ IntSetCursor(PWINSTATION_OBJECT WinStaObject, PCURICON_OBJECT NewCursor,
MaskBmpObj->SurfObj.sizlBitmap, abs(MaskBmpObj->SurfObj.lDelta),
MaskBmpObj->SurfObj.iBitmapFormat, BMF_TOPDOWN,
NULL);
ASSERT(hMask);
if ( !hMask )
{
BITMAPOBJ_UnlockBitmap(NewCursor->IconInfo.hbmMask);
BITMAPOBJ_UnlockBitmap(dcbmp);
return (HCURSOR)0;
}
soMask = EngLockSurface((HSURF)hMask);
EngCopyBits(soMask, &MaskBmpObj->SurfObj, NULL, NULL,
&DestRect, &SourcePoint);