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painting.c
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painting.c
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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Win32k subsystem
* PURPOSE: Window painting function
* FILE: win32ss/user/ntuser/painting.c
* PROGRAMER: Filip Navara (xnavara@volny.cz)
*/
#include <win32k.h>
DBG_DEFAULT_CHANNEL(UserPainting);
BOOL UserExtTextOutW(HDC hdc, INT x, INT y, UINT flags, PRECTL lprc,
LPCWSTR lpString, UINT count);
/* PRIVATE FUNCTIONS **********************************************************/
/**
* @name IntIntersectWithParents
*
* Intersect window rectangle with all parent client rectangles.
*
* @param Child
* Pointer to child window to start intersecting from.
* @param WindowRect
* Pointer to rectangle that we want to intersect in screen
* coordinates on input and intersected rectangle on output (if TRUE
* is returned).
*
* @return
* If any parent is minimized or invisible or the resulting rectangle
* is empty then FALSE is returned. Otherwise TRUE is returned.
*/
BOOL FASTCALL
IntIntersectWithParents(PWND Child, RECTL *WindowRect)
{
PWND ParentWnd;
if (Child->ExStyle & WS_EX_REDIRECTED)
return TRUE;
ParentWnd = Child->spwndParent;
while (ParentWnd != NULL)
{
if (!(ParentWnd->style & WS_VISIBLE) ||
(ParentWnd->style & WS_MINIMIZE) ||
!RECTL_bIntersectRect(WindowRect, WindowRect, &ParentWnd->rcClient) )
{
return FALSE;
}
if (ParentWnd->ExStyle & WS_EX_REDIRECTED)
return TRUE;
ParentWnd = ParentWnd->spwndParent;
}
return TRUE;
}
BOOL FASTCALL
IntValidateParents(PWND Child, BOOL Recurse)
{
RECTL ParentRect, Rect;
BOOL Start, Ret = TRUE;
PWND ParentWnd = Child;
PREGION Rgn = NULL;
if (ParentWnd->style & WS_CHILD)
{
do
ParentWnd = ParentWnd->spwndParent;
while (ParentWnd->style & WS_CHILD);
}
// No pending nonclient paints.
if (!(ParentWnd->state & WNDS_SYNCPAINTPENDING)) Recurse = FALSE;
Start = TRUE;
ParentWnd = Child->spwndParent;
while (ParentWnd)
{
if (ParentWnd->style & WS_CLIPCHILDREN)
break;
if (ParentWnd->hrgnUpdate != 0)
{
if (Recurse)
{
Ret = FALSE;
break;
}
// Start with child clipping.
if (Start)
{
Start = FALSE;
Rect = Child->rcWindow;
if (!IntIntersectWithParents(Child, &Rect)) break;
Rgn = IntSysCreateRectpRgnIndirect(&Rect);
if (Child->hrgnClip)
{
PREGION RgnClip = REGION_LockRgn(Child->hrgnClip);
IntGdiCombineRgn(Rgn, Rgn, RgnClip, RGN_AND);
REGION_UnlockRgn(RgnClip);
}
}
ParentRect = ParentWnd->rcWindow;
if (!IntIntersectWithParents(ParentWnd, &ParentRect)) break;
IntInvalidateWindows( ParentWnd,
Rgn,
RDW_VALIDATE | RDW_NOCHILDREN | RDW_NOUPDATEDIRTY);
}
ParentWnd = ParentWnd->spwndParent;
}
if (Rgn) REGION_Delete(Rgn);
return Ret;
}
/*
Synchronize painting to the top-level windows of other threads.
*/
VOID FASTCALL
IntSendSyncPaint(PWND Wnd, ULONG Flags)
{
PTHREADINFO ptiCur, ptiWnd;
PUSER_SENT_MESSAGE Message;
PLIST_ENTRY Entry;
BOOL bSend = TRUE;
ptiWnd = Wnd->head.pti;
ptiCur = PsGetCurrentThreadWin32Thread();
/*
Not the current thread, Wnd is in send Nonclient paint also in send erase background and it is visiable.
*/
if ( Wnd->head.pti != ptiCur &&
Wnd->state & WNDS_SENDNCPAINT &&
Wnd->state & WNDS_SENDERASEBACKGROUND &&
Wnd->style & WS_VISIBLE)
{
// For testing, if you see this, break out the Champagne and have a party!
TRACE("SendSyncPaint Wnd in State!\n");
if (!IsListEmpty(&ptiWnd->SentMessagesListHead))
{
// Scan sent queue messages to see if we received sync paint messages.
Entry = ptiWnd->SentMessagesListHead.Flink;
Message = CONTAINING_RECORD(Entry, USER_SENT_MESSAGE, ListEntry);
do
{
ERR("LOOP it\n");
if (Message->Msg.message == WM_SYNCPAINT &&
Message->Msg.hwnd == UserHMGetHandle(Wnd))
{ // Already received so exit out.
ERR("SendSyncPaint Found one in the Sent Msg Queue!\n");
bSend = FALSE;
break;
}
Entry = Message->ListEntry.Flink;
Message = CONTAINING_RECORD(Entry, USER_SENT_MESSAGE, ListEntry);
}
while (Entry != &ptiWnd->SentMessagesListHead);
}
if (bSend)
{
TRACE("Sending WM_SYNCPAINT\n");
// This message has no parameters. But it does! Pass Flags along.
co_IntSendMessageNoWait(UserHMGetHandle(Wnd), WM_SYNCPAINT, Flags, 0);
Wnd->state |= WNDS_SYNCPAINTPENDING;
}
}
// Send to all the children if this is the desktop window.
if (UserIsDesktopWindow(Wnd))
{
if ( Flags & RDW_ALLCHILDREN ||
( !(Flags & RDW_NOCHILDREN) && Wnd->style & WS_CLIPCHILDREN))
{
PWND spwndChild = Wnd->spwndChild;
while(spwndChild)
{
if ( spwndChild->style & WS_CHILD &&
spwndChild->head.pti != ptiCur)
{
spwndChild = spwndChild->spwndNext;
continue;
}
IntSendSyncPaint( spwndChild, Flags );
spwndChild = spwndChild->spwndNext;
}
}
}
}
/*
* @name IntCalcWindowRgn
*
* Get a window or client region.
*/
HRGN FASTCALL
IntCalcWindowRgn(PWND Wnd, BOOL Client)
{
HRGN hRgnWindow;
if (Client)
{
hRgnWindow = NtGdiCreateRectRgn(
Wnd->rcClient.left,
Wnd->rcClient.top,
Wnd->rcClient.right,
Wnd->rcClient.bottom);
}
else
{
hRgnWindow = NtGdiCreateRectRgn(
Wnd->rcWindow.left,
Wnd->rcWindow.top,
Wnd->rcWindow.right,
Wnd->rcWindow.bottom);
}
if (Wnd->hrgnClip != NULL && !(Wnd->style & WS_MINIMIZE))
{
NtGdiOffsetRgn(hRgnWindow,
-Wnd->rcWindow.left,
-Wnd->rcWindow.top);
NtGdiCombineRgn(hRgnWindow, hRgnWindow, Wnd->hrgnClip, RGN_AND);
NtGdiOffsetRgn(hRgnWindow,
Wnd->rcWindow.left,
Wnd->rcWindow.top);
}
return hRgnWindow;
}
/*
* @name IntGetNCUpdateRgn
*
* Get non-client update region of a window and optionally validate it.
*
* @param Window
* Pointer to window to get the NC update region from.
* @param Validate
* Set to TRUE to force validating the NC update region.
*
* @return
* Handle to NC update region. The caller is responsible for deleting
* it.
*/
HRGN FASTCALL
IntGetNCUpdateRgn(PWND Window, BOOL Validate)
{
HRGN hRgnNonClient;
HRGN hRgnWindow;
UINT RgnType, NcType;
RECT update;
if (Window->hrgnUpdate != NULL &&
Window->hrgnUpdate != HRGN_WINDOW)
{
hRgnNonClient = IntCalcWindowRgn(Window, FALSE);
/*
* If region creation fails it's safe to fallback to whole
* window region.
*/
if (hRgnNonClient == NULL)
{
return HRGN_WINDOW;
}
hRgnWindow = IntCalcWindowRgn(Window, TRUE);
if (hRgnWindow == NULL)
{
GreDeleteObject(hRgnNonClient);
return HRGN_WINDOW;
}
NcType = IntGdiGetRgnBox(hRgnNonClient, &update);
RgnType = NtGdiCombineRgn(hRgnNonClient, hRgnNonClient, hRgnWindow, RGN_DIFF);
if (RgnType == ERROR)
{
GreDeleteObject(hRgnWindow);
GreDeleteObject(hRgnNonClient);
return HRGN_WINDOW;
}
else if (RgnType == NULLREGION)
{
GreDeleteObject(hRgnWindow);
GreDeleteObject(hRgnNonClient);
Window->state &= ~WNDS_UPDATEDIRTY;
return NULL;
}
/*
* Remove the nonclient region from the standard update region if
* we were asked for it.
*/
if (Validate)
{
if (NtGdiCombineRgn(Window->hrgnUpdate, Window->hrgnUpdate, hRgnWindow, RGN_AND) == NULLREGION)
{
IntGdiSetRegionOwner(Window->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
GreDeleteObject(Window->hrgnUpdate);
Window->state &= ~WNDS_UPDATEDIRTY;
Window->hrgnUpdate = NULL;
if (!(Window->state & WNDS_INTERNALPAINT))
MsqDecPaintCountQueue(Window->head.pti);
}
}
/* check if update rgn contains complete nonclient area */
if (NcType == SIMPLEREGION)
{
RECT window;
IntGetWindowRect( Window, &window );
if (IntEqualRect( &window, &update ))
{
GreDeleteObject(hRgnNonClient);
hRgnNonClient = HRGN_WINDOW;
}
}
GreDeleteObject(hRgnWindow);
return hRgnNonClient;
}
else
{
return Window->hrgnUpdate;
}
}
VOID FASTCALL
IntSendNCPaint(PWND pWnd, HRGN hRgn)
{
pWnd->state &= ~WNDS_SENDNCPAINT;
if ( pWnd == GetW32ThreadInfo()->MessageQueue->spwndActive &&
!(pWnd->state & WNDS_ACTIVEFRAME))
{
pWnd->state |= WNDS_ACTIVEFRAME;
pWnd->state &= ~WNDS_NONCPAINT;
hRgn = HRGN_WINDOW;
}
if (pWnd->state2 & WNDS2_FORCEFULLNCPAINTCLIPRGN)
{
pWnd->state2 &= ~WNDS2_FORCEFULLNCPAINTCLIPRGN;
hRgn = HRGN_WINDOW;
}
if (hRgn) co_IntSendMessage(UserHMGetHandle(pWnd), WM_NCPAINT, (WPARAM)hRgn, 0);
}
VOID FASTCALL
IntSendChildNCPaint(PWND pWnd)
{
for (pWnd = pWnd->spwndChild; pWnd; pWnd = pWnd->spwndNext)
{
if ((pWnd->hrgnUpdate == NULL) && (pWnd->state & WNDS_SENDNCPAINT))
{
USER_REFERENCE_ENTRY Ref;
UserRefObjectCo(pWnd, &Ref);
IntSendNCPaint(pWnd, HRGN_WINDOW);
UserDerefObjectCo(pWnd);
}
}
}
/*
* IntPaintWindows
*
* Internal function used by IntRedrawWindow.
*/
VOID FASTCALL
co_IntPaintWindows(PWND Wnd, ULONG Flags, BOOL Recurse)
{
HDC hDC;
HWND hWnd = Wnd->head.h;
HRGN TempRegion = NULL;
Wnd->state &= ~WNDS_PAINTNOTPROCESSED;
if (Wnd->state & WNDS_SENDNCPAINT ||
Wnd->state & WNDS_SENDERASEBACKGROUND)
{
if (!(Wnd->style & WS_VISIBLE))
{
Wnd->state &= ~(WNDS_SENDNCPAINT|WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
return;
}
else
{
if (Wnd->hrgnUpdate == NULL)
{
Wnd->state &= ~(WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
}
if (Wnd->head.pti == PsGetCurrentThreadWin32Thread())
{
if (Wnd->state & WNDS_SENDNCPAINT)
{
TempRegion = IntGetNCUpdateRgn(Wnd, TRUE);
IntSendNCPaint(Wnd, TempRegion);
if (TempRegion > HRGN_WINDOW && GreIsHandleValid(TempRegion))
{
/* NOTE: The region can already be deleted! */
GreDeleteObject(TempRegion);
}
}
if (Wnd->state & WNDS_SENDERASEBACKGROUND)
{
PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
if (Wnd->hrgnUpdate)
{
hDC = UserGetDCEx( Wnd,
Wnd->hrgnUpdate,
DCX_CACHE|DCX_USESTYLE|DCX_INTERSECTRGN|DCX_KEEPCLIPRGN);
if (Wnd->head.pti->ppi != pti->ppi)
{
ERR("Sending DC to another Process!!!\n");
}
Wnd->state &= ~(WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
// Kill the loop, so Clear before we send.
if (!co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)hDC, 0))
{
Wnd->state |= (WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
}
UserReleaseDC(Wnd, hDC, FALSE);
}
}
}
}
}
/*
* Check that the window is still valid at this point
*/
if (!IntIsWindow(hWnd))
{
return;
}
/*
* Paint child windows.
*/
if (!(Flags & RDW_NOCHILDREN) &&
!(Wnd->style & WS_MINIMIZE) &&
( Flags & RDW_ALLCHILDREN ||
(Flags & RDW_CLIPCHILDREN && Wnd->style & WS_CLIPCHILDREN) ) )
{
HWND *List, *phWnd;
PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
if ((List = IntWinListChildren(Wnd)))
{
for (phWnd = List; *phWnd; ++phWnd)
{
if ((Wnd = UserGetWindowObject(*phWnd)) == NULL)
continue;
if (Wnd->head.pti != pti && Wnd->style & WS_CHILD)
continue;
if (Wnd->style & WS_VISIBLE)
{
USER_REFERENCE_ENTRY Ref;
UserRefObjectCo(Wnd, &Ref);
co_IntPaintWindows(Wnd, Flags, TRUE);
UserDerefObjectCo(Wnd);
}
}
ExFreePoolWithTag(List, USERTAG_WINDOWLIST);
}
}
}
/*
* IntUpdateWindows
*
* Internal function used by IntRedrawWindow, simplecall.
*/
VOID FASTCALL
co_IntUpdateWindows(PWND Wnd, ULONG Flags, BOOL Recurse)
{
HWND hWnd = Wnd->head.h;
if ( Wnd->hrgnUpdate != NULL || Wnd->state & WNDS_INTERNALPAINT )
{
if (Wnd->hrgnUpdate)
{
if (!IntValidateParents(Wnd, Recurse))
{
return;
}
}
if (Wnd->state & WNDS_INTERNALPAINT)
{
Wnd->state &= ~WNDS_INTERNALPAINT;
if (Wnd->hrgnUpdate == NULL)
MsqDecPaintCountQueue(Wnd->head.pti);
}
Wnd->state |= WNDS_PAINTNOTPROCESSED;
Wnd->state &= ~WNDS_UPDATEDIRTY;
Wnd->state2 |= WNDS2_WMPAINTSENT;
co_IntSendMessage(hWnd, WM_PAINT, 0, 0);
if (Wnd->state & WNDS_PAINTNOTPROCESSED)
{
USER_REFERENCE_ENTRY Ref;
UserRefObjectCo(Wnd, &Ref);
co_IntPaintWindows(Wnd, RDW_NOCHILDREN, FALSE);
UserDerefObjectCo(Wnd);
}
}
// Force flags as a toggle. Fixes msg:test_paint_messages:WmChildPaintNc.
Flags = (Flags & RDW_NOCHILDREN) ? RDW_NOCHILDREN : RDW_ALLCHILDREN; // All children is the default.
/*
* Update child windows.
*/
if (!(Flags & RDW_NOCHILDREN) &&
(Flags & RDW_ALLCHILDREN) &&
!UserIsDesktopWindow(Wnd))
{
PWND Child;
for (Child = Wnd->spwndChild; Child; Child = Child->spwndNext)
{
/* transparent window, check for non-transparent sibling to paint first, then skip it */
if ( Child->ExStyle & WS_EX_TRANSPARENT &&
( Child->hrgnUpdate != NULL || Child->state & WNDS_INTERNALPAINT ) )
{
PWND Next = Child->spwndNext;
while (Next)
{
if ( Next->hrgnUpdate != NULL || Next->state & WNDS_INTERNALPAINT ) break;
Next = Next->spwndNext;
}
if (Next) continue;
}
if (Child->style & WS_VISIBLE)
{
USER_REFERENCE_ENTRY Ref;
UserRefObjectCo(Child, &Ref);
co_IntUpdateWindows(Child, Flags, TRUE);
UserDerefObjectCo(Child);
}
}
}
}
VOID FASTCALL
UserUpdateWindows(PWND pWnd, ULONG Flags)
{
// If transparent and any sibling windows below needs to be painted, leave.
if (pWnd->ExStyle & WS_EX_TRANSPARENT)
{
PWND Next = pWnd->spwndNext;
while(Next)
{
if ( Next->head.pti == pWnd->head.pti &&
( Next->hrgnUpdate != NULL || Next->state & WNDS_INTERNALPAINT) )
{
return;
}
Next = Next->spwndNext;
}
}
co_IntUpdateWindows(pWnd, Flags, FALSE);
}
VOID FASTCALL
UserSyncAndPaintWindows(PWND pWnd, ULONG Flags)
{
PWND Parent = pWnd;
// Find parent, if it needs to be painted, leave.
while(TRUE)
{
if ((Parent = Parent->spwndParent) == NULL) break;
if ( Parent->style & WS_CLIPCHILDREN ) break;
if ( Parent->hrgnUpdate != NULL || Parent->state & WNDS_INTERNALPAINT ) return;
}
IntSendSyncPaint(pWnd, Flags);
co_IntPaintWindows(pWnd, Flags, FALSE);
}
/*
* IntInvalidateWindows
*
* Internal function used by IntRedrawWindow, UserRedrawDesktop,
* co_WinPosSetWindowPos, co_UserRedrawWindow.
*/
VOID FASTCALL
IntInvalidateWindows(PWND Wnd, PREGION Rgn, ULONG Flags)
{
INT RgnType = NULLREGION;
BOOL HadPaintMessage;
TRACE("IntInvalidateWindows start Rgn %p\n",Rgn);
if ( Rgn > PRGN_WINDOW )
{
/*
* If the nonclient is not to be redrawn, clip the region to the client
* rect
*/
if ((Flags & RDW_INVALIDATE) != 0 && (Flags & RDW_FRAME) == 0)
{
PREGION RgnClient;
RgnClient = IntSysCreateRectpRgnIndirect(&Wnd->rcClient);
if (RgnClient)
{
RgnType = IntGdiCombineRgn(Rgn, Rgn, RgnClient, RGN_AND);
REGION_Delete(RgnClient);
}
}
/*
* Clip the given region with window rectangle (or region)
*/
if (!Wnd->hrgnClip || (Wnd->style & WS_MINIMIZE))
{
PREGION RgnWindow = IntSysCreateRectpRgnIndirect(&Wnd->rcWindow);
if (RgnWindow)
{
RgnType = IntGdiCombineRgn(Rgn, Rgn, RgnWindow, RGN_AND);
REGION_Delete(RgnWindow);
}
}
else
{
PREGION RgnClip = REGION_LockRgn(Wnd->hrgnClip);
if (RgnClip)
{
REGION_bOffsetRgn(Rgn,
-Wnd->rcWindow.left,
-Wnd->rcWindow.top);
RgnType = IntGdiCombineRgn(Rgn, Rgn, RgnClip, RGN_AND);
REGION_bOffsetRgn(Rgn,
Wnd->rcWindow.left,
Wnd->rcWindow.top);
REGION_UnlockRgn(RgnClip);
}
}
}
else
{
RgnType = NULLREGION;
}
/*
* Save current state of pending updates
*/
HadPaintMessage = IntIsWindowDirty(Wnd);
/*
* Update the region and flags
*/
// The following flags are used to invalidate the window.
if (Flags & (RDW_INVALIDATE|RDW_INTERNALPAINT|RDW_ERASE|RDW_FRAME))
{
if (Flags & RDW_INTERNALPAINT)
{
Wnd->state |= WNDS_INTERNALPAINT;
}
if (Flags & RDW_INVALIDATE )
{
PREGION RgnUpdate;
Wnd->state &= ~WNDS_NONCPAINT;
/* If not the same thread set it dirty. */
if (Wnd->head.pti != PsGetCurrentThreadWin32Thread())
{
Wnd->state |= WNDS_UPDATEDIRTY;
if (Wnd->state2 & WNDS2_WMPAINTSENT)
Wnd->state2 |= WNDS2_ENDPAINTINVALIDATE;
}
if (Flags & RDW_FRAME)
Wnd->state |= WNDS_SENDNCPAINT;
if (Flags & RDW_ERASE)
Wnd->state |= WNDS_SENDERASEBACKGROUND;
if (RgnType != NULLREGION && Rgn > PRGN_WINDOW)
{
if (Wnd->hrgnUpdate == NULL)
{
Wnd->hrgnUpdate = NtGdiCreateRectRgn(0, 0, 0, 0);
IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_PUBLIC);
}
if (Wnd->hrgnUpdate != HRGN_WINDOW)
{
RgnUpdate = REGION_LockRgn(Wnd->hrgnUpdate);
if (RgnUpdate)
{
RgnType = IntGdiCombineRgn(RgnUpdate, RgnUpdate, Rgn, RGN_OR);
REGION_UnlockRgn(RgnUpdate);
if (RgnType == NULLREGION)
{
IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
GreDeleteObject(Wnd->hrgnUpdate);
Wnd->hrgnUpdate = NULL;
}
}
}
}
Flags |= RDW_ERASE|RDW_FRAME; // For children.
}
if (!HadPaintMessage && IntIsWindowDirty(Wnd))
{
MsqIncPaintCountQueue(Wnd->head.pti);
}
} // The following flags are used to validate the window.
else if (Flags & (RDW_VALIDATE|RDW_NOINTERNALPAINT|RDW_NOERASE|RDW_NOFRAME))
{
if (Wnd->state & WNDS_UPDATEDIRTY && !(Flags & RDW_NOUPDATEDIRTY))
return;
if (Flags & RDW_NOINTERNALPAINT)
{
Wnd->state &= ~WNDS_INTERNALPAINT;
}
if (Flags & RDW_VALIDATE)
{
if (Flags & RDW_NOFRAME)
Wnd->state &= ~WNDS_SENDNCPAINT;
if (Flags & RDW_NOERASE)
Wnd->state &= ~(WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
if (Wnd->hrgnUpdate > HRGN_WINDOW && RgnType != NULLREGION && Rgn > PRGN_WINDOW)
{
PREGION RgnUpdate = REGION_LockRgn(Wnd->hrgnUpdate);
if (RgnUpdate)
{
RgnType = IntGdiCombineRgn(RgnUpdate, RgnUpdate, Rgn, RGN_DIFF);
REGION_UnlockRgn(RgnUpdate);
if (RgnType == NULLREGION)
{
IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
GreDeleteObject(Wnd->hrgnUpdate);
Wnd->hrgnUpdate = NULL;
}
}
}
// If update is null, do not erase.
if (Wnd->hrgnUpdate == NULL)
{
Wnd->state &= ~(WNDS_SENDERASEBACKGROUND|WNDS_ERASEBACKGROUND);
}
}
if (HadPaintMessage && !IntIsWindowDirty(Wnd))
{
MsqDecPaintCountQueue(Wnd->head.pti);
}
}
/*
* Process children if needed
*/
if (!(Flags & RDW_NOCHILDREN) &&
!(Wnd->style & WS_MINIMIZE) &&
((Flags & RDW_ALLCHILDREN) || !(Wnd->style & WS_CLIPCHILDREN)))
{
PWND Child;
for (Child = Wnd->spwndChild; Child; Child = Child->spwndNext)
{
if (Child->style & WS_VISIBLE)
{
/*
* Recursive call to update children hrgnUpdate
*/
PREGION RgnTemp = IntSysCreateRectpRgn(0, 0, 0, 0);
if (RgnTemp)
{
if (Rgn > PRGN_WINDOW) IntGdiCombineRgn(RgnTemp, Rgn, 0, RGN_COPY);
IntInvalidateWindows(Child, ((Rgn > PRGN_WINDOW)?RgnTemp:Rgn), Flags);
REGION_Delete(RgnTemp);
}
}
}
}
TRACE("IntInvalidateWindows exit\n");
}
/*
* IntIsWindowDrawable
*
* Remarks
* Window is drawable when it is visible and all parents are not
* minimized.
*/
BOOL FASTCALL
IntIsWindowDrawable(PWND Wnd)
{
PWND WndObject;
for (WndObject = Wnd; WndObject != NULL; WndObject = WndObject->spwndParent)
{
if ( WndObject->state2 & WNDS2_INDESTROY ||
WndObject->state & WNDS_DESTROYED ||
!WndObject ||
!(WndObject->style & WS_VISIBLE) ||
((WndObject->style & WS_MINIMIZE) && (WndObject != Wnd)))
{
return FALSE;
}
}
return TRUE;
}
/*
* IntRedrawWindow
*
* Internal version of NtUserRedrawWindow that takes WND as
* first parameter.
*/
BOOL FASTCALL
co_UserRedrawWindow(
PWND Window,
const RECTL* UpdateRect,
PREGION UpdateRgn,
ULONG Flags)
{
PREGION TmpRgn = NULL;
TRACE("co_UserRedrawWindow start Rgn %p\n",UpdateRgn);
/*
* Step 1.
* Validation of passed parameters.
*/
if (!IntIsWindowDrawable(Window))
{
return TRUE; // Just do nothing!!!
}
if (Window == NULL)
{
Window = UserGetDesktopWindow();
}
/*
* Step 2.
* Transform the parameters UpdateRgn and UpdateRect into
* a region hRgn specified in screen coordinates.
*/
if (Flags & (RDW_INVALIDATE | RDW_VALIDATE)) // Both are OKAY!
{
/* We can't hold lock on GDI objects while doing roundtrips to user mode,
* so use a copy instead */
if (UpdateRgn)
{
TmpRgn = IntSysCreateRectpRgn(0, 0, 0, 0);
if (UpdateRgn > PRGN_WINDOW)
{
IntGdiCombineRgn(TmpRgn, UpdateRgn, NULL, RGN_COPY);
}
if (Window != UserGetDesktopWindow())
{
REGION_bOffsetRgn(TmpRgn, Window->rcClient.left, Window->rcClient.top);
}
}
else
{
if (UpdateRect != NULL)
{
if (Window == UserGetDesktopWindow())
{
TmpRgn = IntSysCreateRectpRgnIndirect(UpdateRect);
}
else
{
TmpRgn = IntSysCreateRectpRgn(Window->rcClient.left + UpdateRect->left,
Window->rcClient.top + UpdateRect->top,
Window->rcClient.left + UpdateRect->right,
Window->rcClient.top + UpdateRect->bottom);
}
}
else
{
if ((Flags & (RDW_INVALIDATE | RDW_FRAME)) == (RDW_INVALIDATE | RDW_FRAME) ||
(Flags & (RDW_VALIDATE | RDW_NOFRAME)) == (RDW_VALIDATE | RDW_NOFRAME))
{
if (!RECTL_bIsEmptyRect(&Window->rcWindow))
TmpRgn = IntSysCreateRectpRgnIndirect(&Window->rcWindow);
}
else
{
if (!RECTL_bIsEmptyRect(&Window->rcClient))
TmpRgn = IntSysCreateRectpRgnIndirect(&Window->rcClient);
}
}
}
}
/* Fixes test RDW_INTERNALPAINT behavior */
if (TmpRgn == NULL)
{
TmpRgn = PRGN_WINDOW; // Need a region so the bits can be set!!!
}
/*
* Step 3.
* Adjust the window update region depending on hRgn and flags.
*/
if (Flags & (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT) &&
TmpRgn != NULL)
{
IntInvalidateWindows(Window, TmpRgn, Flags);
}
/*
* Step 4.
* Repaint and erase windows if needed.
*/
if (Flags & RDW_UPDATENOW)
{
UserUpdateWindows(Window, Flags);
}
else if (Flags & RDW_ERASENOW)
{
if ((Flags & (RDW_NOCHILDREN|RDW_ALLCHILDREN)) == 0)
Flags |= RDW_CLIPCHILDREN;
UserSyncAndPaintWindows(Window, Flags);
}
/*
* Step 5.
* Cleanup ;-)
*/
if (TmpRgn > PRGN_WINDOW)
{
REGION_Delete(TmpRgn);
}
TRACE("co_UserRedrawWindow exit\n");