Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-02-24 17:34:57 +00:00
Code Issues Projects Releases Packages Wiki Activity

[WIN32K]

Browse source 
Make sure to respect GDI object lock order in (Nt)UserScrollDC

svn path=/trunk/; revision=65745
This commit is contained in:
Timo Kreuzer 2014-12-19 09:26:50 +00:00
parent b037edeae8
commit fc5dd61639
1 changed files with 22 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
reactos/win32ss/user/ntuser/painting.c
View file

@ -1490,6 +1490,7 @@ UserScrollDC(
INT dy,
const RECTL *prcScroll,
const RECTL *prcClip,
HRGN hrgnUpdate,
PREGION RgnUpdate,
RECTL *prcUpdate)
{
@ -1535,16 +1536,27 @@ UserScrollDC(
/* Calculate the region that was invalidated by moving or
could not be copied, because it was not visible */
if (RgnUpdate || prcUpdate)
if (RgnUpdate || hrgnUpdate || prcUpdate)
{
PREGION RgnOwn, RgnTmp;
pDC = DC_LockDc(hDC);
if (!pDC)
{
return FALSE;
return ERROR;
}
if (hrgnUpdate)
{
NT_ASSERT(RgnUpdate == NULL);
RgnUpdate = RGNOBJAPI_Lock(hrgnUpdate, NULL);
if (!RgnUpdate)
{
DC_UnlockDc(pDC);
return ERROR;
}
}
/* Begin with the shifted and then clipped scroll rect */
rcDst = rcScroll;
RECTL_vOffsetRect(&rcDst, dx, dy);
@ -1578,7 +1590,11 @@ UserScrollDC(
REGION_GetRgnBox(RgnOwn, prcUpdate);
}
if (!RgnUpdate)
if (hrgnUpdate)
{
RGNOBJAPI_Unlock(RgnUpdate);
}
else if (!RgnUpdate)
{
REGION_Delete(RgnOwn);
}
@ -1609,7 +1625,6 @@ NtUserScrollDC(
RECTL rcScroll, rcClip, rcUpdate;
NTSTATUS Status = STATUS_SUCCESS;
DWORD Result;
PREGION RgnUpdate = NULL;
TRACE("Enter NtUserScrollDC\n");
UserEnterExclusive();
@ -1642,19 +1657,13 @@ NtUserScrollDC(
RETURN(FALSE);
}
if (hrgnUpdate)
{
RgnUpdate = RGNOBJAPI_Lock(hrgnUpdate, NULL);
if (!RgnUpdate)
RETURN(FALSE);
}
Result = UserScrollDC( hDC,
dx,
dy,
prcUnsafeScroll? &rcScroll : 0,
prcUnsafeClip? &rcClip : 0,
RgnUpdate,
hrgnUpdate,
NULL,
prcUnsafeUpdate? &rcUpdate : NULL);
if(Result == ERROR)
{
@ -1684,8 +1693,6 @@ NtUserScrollDC(
RETURN(TRUE);
CLEANUP:
if (RgnUpdate)
RGNOBJAPI_Unlock(RgnUpdate);
TRACE("Leave NtUserScrollDC, ret=%lu\n",_ret_);
UserLeave();
END_CLEANUP;
@ -1824,6 +1831,7 @@ NtUserScrollWindowEx(
dy,
&rcScroll,
&rcClip,
NULL,
RgnUpdate,
prcUnsafeUpdate? &rcUpdate : NULL);