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Sweden-Number/windows/painting.c

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/*
* Window painting functions
*
* Copyright 1993, 1994, 1995 Alexandre Julliard
* 1999 Alex Korobka
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "wownt32.h"
#include "wine/unicode.h"
#include "wine/server.h"
#include "user.h"
#include "win.h"
#include "message.h"
#include "dce.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
WINE_DECLARE_DEBUG_CHANNEL(nonclient);
/* client rect in window coordinates */
#define GETCLIENTRECTW( wnd, r ) (r).left = (wnd)->rectClient.left - (wnd)->rectWindow.left; \
(r).top = (wnd)->rectClient.top - (wnd)->rectWindow.top; \
(r).right = (wnd)->rectClient.right - (wnd)->rectWindow.left; \
(r).bottom = (wnd)->rectClient.bottom - (wnd)->rectWindow.top
/* PAINT_RedrawWindow() control flags */
#define RDW_EX_DELAY_NCPAINT 0x0020
/* WIN_UpdateNCRgn() flags */
#define UNC_CHECK 0x0001
#define UNC_ENTIRE 0x0002
#define UNC_REGION 0x0004
#define UNC_UPDATE 0x0008
#define UNC_DELAY_NCPAINT 0x0010
#define UNC_IN_BEGINPAINT 0x0020
HPALETTE (WINAPI *pfnGDISelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = NULL;
UINT (WINAPI *pfnGDIRealizePalette)(HDC hdc) = NULL;
/***********************************************************************
* add_paint_count
*
* Add an increment (normally 1 or -1) to the current paint count of a window.
*/
static void add_paint_count( HWND hwnd, int incr )
{
SERVER_START_REQ( inc_window_paint_count )
{
req->handle = hwnd;
req->incr = incr;
wine_server_call( req );
}
SERVER_END_REQ;
}
/***********************************************************************
* crop_rgn
*
* hSrc: Region to crop.
* lpRect: Clipping rectangle.
*
* hDst: Region to hold the result (a new region is created if it's 0).
* Allowed to be the same region as hSrc in which case everything
* will be done in place, with no memory reallocations.
*
* Returns: hDst if success, 0 otherwise.
*/
static HRGN crop_rgn( HRGN hDst, HRGN hSrc, const RECT *rect )
{
HRGN h = CreateRectRgnIndirect( rect );
if (hDst == 0) hDst = h;
CombineRgn( hDst, hSrc, h, RGN_AND );
if (hDst != h) DeleteObject( h );
return hDst;
}
/***********************************************************************
* WIN_HaveToDelayNCPAINT
*
* Currently, in the Wine painting mechanism, the WM_NCPAINT message
* is generated as soon as a region intersecting the non-client area
* of a window is invalidated.
*
* This technique will work fine for all windows whose parents
* have the WS_CLIPCHILDREN style. When the parents have that style,
* they are not going to override the contents of their children.
* However, when the parent doesn't have that style, Windows relies
* on a "painter's algorithm" to display the contents of the windows.
* That is, windows are painted from back to front. This includes the
* non-client area.
*
* This method looks at the current state of a window to determine
* if the sending of the WM_NCPAINT message should be delayed until
* the BeginPaint call.
*
* PARAMS:
* wndPtr - A Locked window pointer to the window we're
* examining.
* uncFlags - This is the flag passed to the WIN_UpdateNCRgn
* function. This is a shortcut for the cases when
* we already know when to avoid scanning all the
* parents of a window. If you already know that this
* window's NCPAINT should be delayed, set the
* UNC_DELAY_NCPAINT flag for this parameter.
*
* This shortcut behavior is implemented in the
* RDW_Paint() method.
*
*/
static BOOL WIN_HaveToDelayNCPAINT( HWND hwnd, UINT uncFlags)
{
/*
* Test the shortcut first. (duh)
*/
if (uncFlags & UNC_DELAY_NCPAINT)
return TRUE;
/*
* The UNC_IN_BEGINPAINT flag is set in the BeginPaint
* method only. This is another shortcut to avoid going
* up the parent's chain of the window to finally
* figure-out that none of them has an invalid region.
*/
if (uncFlags & UNC_IN_BEGINPAINT)
return FALSE;
/*
* Scan all the parents of this window to find a window
* that doesn't have the WS_CLIPCHILDREN style and that
* has an invalid region.
*/
while ((hwnd = GetAncestor( hwnd, GA_PARENT )))
{
WND* parentWnd = WIN_FindWndPtr( hwnd );
if (parentWnd && !(parentWnd->dwStyle & WS_CLIPCHILDREN) && parentWnd->hrgnUpdate)
{
WIN_ReleaseWndPtr( parentWnd );
return TRUE;
}
WIN_ReleaseWndPtr( parentWnd );
}
return FALSE;
}
/***********************************************************************
* WIN_UpdateNCRgn
*
* Things to do:
* Send WM_NCPAINT if required (when nonclient is invalid or UNC_ENTIRE flag is set)
* Crop hrgnUpdate to a client rect, especially if it 1.
* If UNC_REGION is set return update region for the client rect.
*
* NOTE: UNC_REGION is mainly for the RDW_Paint() chunk that sends WM_ERASEBKGND message.
* The trick is that when the returned region handle may be different from hRgn.
* In this case the old hRgn must be considered gone. BUT, if the returned value
* is 1 then the hRgn is preserved and RDW_Paint() will have to get
* a DC without extra clipping region.
*/
static HRGN WIN_UpdateNCRgn(WND* wnd, HRGN hRgn, UINT uncFlags )
{
RECT r;
HRGN hClip = 0;
HRGN hrgnRet = 0;
TRACE_(nonclient)("hwnd %p [%p] hrgn %p, unc %04x, ncf %i\n",
wnd->hwndSelf, wnd->hrgnUpdate, hRgn, uncFlags, wnd->flags & WIN_NEEDS_NCPAINT);
/* desktop window doesn't have a nonclient area */
if(wnd->hwndSelf == GetDesktopWindow())
{
wnd->flags &= ~WIN_NEEDS_NCPAINT;
if( wnd->hrgnUpdate > (HRGN)1 )
{
if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
hrgnRet = hRgn;
}
else
{
hrgnRet = wnd->hrgnUpdate;
}
return hrgnRet;
}
if ((wnd->hwndSelf == GetForegroundWindow()) &&
!(wnd->flags & WIN_NCACTIVATED) )
{
wnd->flags |= WIN_NCACTIVATED;
uncFlags |= UNC_ENTIRE;
}
/*
* If the window's non-client area needs to be painted,
*/
if ( ( wnd->flags & WIN_NEEDS_NCPAINT ) &&
!WIN_HaveToDelayNCPAINT(wnd->hwndSelf, uncFlags) )
{
RECT r2, r3;
wnd->flags &= ~WIN_NEEDS_NCPAINT;
GETCLIENTRECTW( wnd, r );
TRACE_(nonclient)( "\tclient box (%ld,%ld-%ld,%ld), hrgnUpdate %p\n",
r.left, r.top, r.right, r.bottom, wnd->hrgnUpdate );
if( wnd->hrgnUpdate > (HRGN)1 )
{
/* Check if update rgn overlaps with nonclient area */
GetRgnBox( wnd->hrgnUpdate, &r2 );
UnionRect( &r3, &r2, &r );
if( r3.left != r.left || r3.top != r.top ||
r3.right != r.right || r3.bottom != r.bottom ) /* it does */
{
/* crop hrgnUpdate, save old one in hClip - the only
* case that places a valid region handle in hClip */
hClip = wnd->hrgnUpdate;
wnd->hrgnUpdate = crop_rgn( hRgn, hClip, &r );
if( uncFlags & UNC_REGION ) hrgnRet = hClip;
}
if( uncFlags & UNC_CHECK )
{
GetRgnBox( wnd->hrgnUpdate, &r3 );
if( IsRectEmpty( &r3 ) )
{
/* delete the update region since all invalid
* parts were in the nonclient area */
DeleteObject( wnd->hrgnUpdate );
wnd->hrgnUpdate = 0;
if(!(wnd->flags & WIN_INTERNAL_PAINT))
add_paint_count( wnd->hwndSelf, -1 );
wnd->flags &= ~WIN_NEEDS_ERASEBKGND;
}
}
if(!hClip && wnd->hrgnUpdate ) goto copyrgn;
}
else
if( wnd->hrgnUpdate == (HRGN)1 )/* entire window */
{
if( uncFlags & UNC_UPDATE ) wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
uncFlags |= UNC_ENTIRE;
}
}
else /* no WM_NCPAINT unless forced */
{
if( wnd->hrgnUpdate > (HRGN)1 )
{
copyrgn:
if( uncFlags & UNC_REGION )
{
if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
hrgnRet = hRgn;
}
}
else
if( wnd->hrgnUpdate == (HRGN)1 && (uncFlags & UNC_UPDATE) )
{
GETCLIENTRECTW( wnd, r );
wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
}
}
if(!hClip && (uncFlags & UNC_ENTIRE) )
{
/* still don't do anything if there is no nonclient area */
hClip = (HRGN)(memcmp( &wnd->rectWindow, &wnd->rectClient, sizeof(RECT) ) != 0);
}
if( hClip ) /* NOTE: WM_NCPAINT allows wParam to be 1 */
{
if ( hClip == hrgnRet && hrgnRet > (HRGN)1 ) {
hClip = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( hClip, hrgnRet, 0, RGN_COPY );
}
SendMessageA( wnd->hwndSelf, WM_NCPAINT, (WPARAM)hClip, 0L );
if( (hClip > (HRGN)1) && (hClip != hRgn) && (hClip != hrgnRet) )
DeleteObject( hClip );
/*
* Since all Window locks are suspended while processing the WM_NCPAINT
* we want to make sure the window still exists before continuing.
*/
if (!IsWindow(wnd->hwndSelf))
{
DeleteObject(hrgnRet);
hrgnRet=0;
}
}
TRACE_(nonclient)("returning %p (hClip = %p, hrgnUpdate = %p)\n", hrgnRet, hClip, wnd->hrgnUpdate );
return hrgnRet;
}
/***********************************************************************
* RDW_ValidateParent [RDW_UpdateRgns() helper]
*
* Validate the portions of parents that are covered by a validated child
* wndPtr = child
*/
static void RDW_ValidateParent(WND *wndChild)
{
HWND parent;
HRGN hrg;
if (wndChild->hrgnUpdate == (HRGN)1 ) {
RECT r;
r.left = 0;
r.top = 0;
r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
hrg = CreateRectRgnIndirect( &r );
} else
hrg = wndChild->hrgnUpdate;
parent = GetAncestor( wndChild->hwndSelf, GA_PARENT );
while (parent && parent != GetDesktopWindow())
{
WND *wndParent = WIN_FindWndPtr( parent );
if (wndParent && !(wndParent->dwStyle & WS_CLIPCHILDREN))
{
if (wndParent->hrgnUpdate != 0)
{
POINT ptOffset;
RECT rect, rectParent;
if( wndParent->hrgnUpdate == (HRGN)1 )
{
RECT r;
r.left = 0;
r.top = 0;
r.right = wndParent->rectWindow.right - wndParent->rectWindow.left;
r.bottom = wndParent->rectWindow.bottom - wndParent->rectWindow.top;
wndParent->hrgnUpdate = CreateRectRgnIndirect( &r );
}
/* we must offset the child region by the offset of the child rect in the parent */
GetWindowRect(wndParent->hwndSelf, &rectParent);
GetWindowRect(wndChild->hwndSelf, &rect);
ptOffset.x = rect.left - rectParent.left;
ptOffset.y = rect.top - rectParent.top;
OffsetRgn( hrg, ptOffset.x, ptOffset.y );
if (CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF ) == NULLREGION)
{
/* the update region has become empty */
DeleteObject( wndParent->hrgnUpdate );
wndParent->hrgnUpdate = 0;
wndParent->flags &= ~WIN_NEEDS_ERASEBKGND;
if( !(wndParent->flags & WIN_INTERNAL_PAINT) )
add_paint_count( wndParent->hwndSelf, -1 );
}
OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
}
}
WIN_ReleaseWndPtr( wndParent );
parent = GetAncestor( parent, GA_PARENT );
}
if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
}
/***********************************************************************
* RDW_UpdateRgns [RedrawWindow() helper]
*
* Walks the window tree and adds/removes parts of the hRgn to/from update
* regions of windows that overlap it. Also, manages internal paint flags.
*
* NOTE: Walks the window tree so the caller must lock it.
* MUST preserve hRgn (can modify but then has to restore).
*/
static void RDW_UpdateRgns( WND* wndPtr, HRGN hRgn, UINT flags, BOOL firstRecursLevel )
{
/*
* Called only when one of the following is set:
* (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT)
*/
BOOL bHadOne = wndPtr->hrgnUpdate && hRgn;
BOOL bChildren = (!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) );
RECT r;
r.left = 0;
r.top = 0;
r.right = wndPtr->rectWindow.right - wndPtr->rectWindow.left;
r.bottom = wndPtr->rectWindow.bottom - wndPtr->rectWindow.top;
TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", wndPtr->hwndSelf, wndPtr->hrgnUpdate, hRgn, flags );
if( flags & RDW_INVALIDATE )
{
if( hRgn > (HRGN)1 )
{
switch ((UINT)wndPtr->hrgnUpdate)
{
default:
CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_OR );
/* fall through */
case 0:
wndPtr->hrgnUpdate = crop_rgn( wndPtr->hrgnUpdate,
wndPtr->hrgnUpdate ? wndPtr->hrgnUpdate : hRgn,
&r );
if( !bHadOne )
{
GetRgnBox( wndPtr->hrgnUpdate, &r );
if( IsRectEmpty( &r ) )
{
DeleteObject( wndPtr->hrgnUpdate );
wndPtr->hrgnUpdate = 0;
goto end;
}
}
break;
case 1: /* already an entire window */
break;
}
}
else if( hRgn == (HRGN)1 )
{
if( wndPtr->hrgnUpdate > (HRGN)1 )
DeleteObject( wndPtr->hrgnUpdate );
wndPtr->hrgnUpdate = (HRGN)1;
}
else
{
/* hRgn is zero */
if( wndPtr->hrgnUpdate > (HRGN)1)
{
GetRgnBox( wndPtr->hrgnUpdate, &r );
if( IsRectEmpty( &r ) )
{
DeleteObject( wndPtr->hrgnUpdate );
wndPtr->hrgnUpdate = 0;
goto end;
}
}
hRgn = wndPtr->hrgnUpdate; /* this is a trick that depends
* on code in RDW_Paint() */
}
if( !bHadOne && !(wndPtr->flags & WIN_INTERNAL_PAINT) )
add_paint_count( wndPtr->hwndSelf, 1 );
if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
flags |= RDW_FRAME;
}
else if( flags & RDW_VALIDATE )
{
if( wndPtr->hrgnUpdate )
{
if( hRgn > (HRGN)1 )
{
if( wndPtr->hrgnUpdate == (HRGN)1 )
wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r );
if( CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_DIFF )
== NULLREGION )
{
DeleteObject( wndPtr->hrgnUpdate );
wndPtr->hrgnUpdate = 0;
}
}
else /* validate everything */
{
if( wndPtr->hrgnUpdate > (HRGN)1 ) DeleteObject( wndPtr->hrgnUpdate );
wndPtr->hrgnUpdate = 0;
}
if( !wndPtr->hrgnUpdate )
{
wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
if( !(wndPtr->flags & WIN_INTERNAL_PAINT) )
add_paint_count( wndPtr->hwndSelf, -1 );
}
}
if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
}
if ((firstRecursLevel) && (wndPtr->hrgnUpdate != 0) && (flags & RDW_UPDATENOW))
RDW_ValidateParent(wndPtr); /* validate parent covered by region */
/* in/validate child windows that intersect with the region if it
* is a valid handle. */
if( flags & (RDW_INVALIDATE | RDW_VALIDATE) )
{
HWND *list;
if( hRgn > (HRGN)1 && bChildren && (list = WIN_ListChildren( wndPtr->hwndSelf )))
{
POINT ptTotal, prevOrigin = {0,0};
POINT ptClient;
INT i;
ptClient.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
ptClient.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
for(i = ptTotal.x = ptTotal.y = 0; list[i]; i++)
{
WND *wnd = WIN_FindWndPtr( list[i] );
if (!wnd) continue;
if( wnd->dwStyle & WS_VISIBLE )
{
POINT ptOffset;
r.left = wnd->rectWindow.left + ptClient.x;
r.right = wnd->rectWindow.right + ptClient.x;
r.top = wnd->rectWindow.top + ptClient.y;
r.bottom = wnd->rectWindow.bottom + ptClient.y;
ptOffset.x = r.left - prevOrigin.x;
ptOffset.y = r.top - prevOrigin.y;
OffsetRect( &r, -ptTotal.x, -ptTotal.y );
if( RectInRegion( hRgn, &r ) )
{
OffsetRgn( hRgn, -ptOffset.x, -ptOffset.y );
RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
prevOrigin.x = r.left + ptTotal.x;
prevOrigin.y = r.top + ptTotal.y;
ptTotal.x += ptOffset.x;
ptTotal.y += ptOffset.y;
}
}
WIN_ReleaseWndPtr( wnd );
}
HeapFree( GetProcessHeap(), 0, list );
OffsetRgn( hRgn, ptTotal.x, ptTotal.y );
bChildren = 0;
}
}
/* handle hRgn == 1 (alias for entire window) and/or internal paint recursion */
if( bChildren )
{
HWND *list;
if ((list = WIN_ListChildren( wndPtr->hwndSelf )))
{
INT i;
for (i = 0; list[i]; i++)
{
WND *wnd = WIN_FindWndPtr( list[i] );
if (!wnd) continue;
if( wnd->dwStyle & WS_VISIBLE )
RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
WIN_ReleaseWndPtr( wnd );
}
HeapFree( GetProcessHeap(), 0, list );
}
}
end:
/* Set/clear internal paint flag */
if (flags & RDW_INTERNALPAINT)
{
if ( !wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
add_paint_count( wndPtr->hwndSelf, 1 );
wndPtr->flags |= WIN_INTERNAL_PAINT;
}
else if (flags & RDW_NOINTERNALPAINT)
{
if ( !wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
add_paint_count( wndPtr->hwndSelf, -1 );
wndPtr->flags &= ~WIN_INTERNAL_PAINT;
}
}
/***********************************************************************
* RDW_Paint [RedrawWindow() helper]
*
* Walks the window tree and paints/erases windows that have
* nonzero update regions according to redraw flags. hrgn is a scratch
* region passed down during recursion. Must not be 1.
*
*/
static HRGN RDW_Paint( WND* wndPtr, HRGN hrgn, UINT flags, UINT ex )
{
/* NOTE: wndPtr is locked by caller.
*
* FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
* SendMessage() calls. This is a comment inside DefWindowProc() source
* from 16-bit SDK:
*
* This message avoids lots of inter-app message traffic
* by switching to the other task and continuing the
* recursion there.
*
* wParam = flags
* LOWORD(lParam) = hrgnClip
* HIWORD(lParam) = hwndSkip (not used; always NULL)
*
*/
HDC hDC;
HWND hWnd = wndPtr->hwndSelf;
BOOL bIcon = ((wndPtr->dwStyle & WS_MINIMIZE) && GetClassLongA(hWnd, GCL_HICON));
/* Erase/update the window itself ... */
TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", hWnd, wndPtr->hrgnUpdate, hrgn, flags );
/*
* Check if this window should delay it's processing of WM_NCPAINT.
* See WIN_HaveToDelayNCPAINT for a description of the mechanism
*/
if ((ex & RDW_EX_DELAY_NCPAINT) || WIN_HaveToDelayNCPAINT(wndPtr->hwndSelf, 0) )
ex |= RDW_EX_DELAY_NCPAINT;
if (flags & RDW_UPDATENOW)
{
if (wndPtr->hrgnUpdate) SendMessageW( hWnd, WM_PAINT, 0, 0 );
}
else if (flags & RDW_ERASENOW)
{
UINT dcx = DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN | DCX_WINDOWPAINT | DCX_CACHE;
HRGN hrgnRet;
hrgnRet = WIN_UpdateNCRgn(wndPtr,
hrgn,
UNC_REGION | UNC_CHECK |
((ex & RDW_EX_DELAY_NCPAINT) ? UNC_DELAY_NCPAINT : 0) );
if( hrgnRet )
{
if( hrgnRet > (HRGN)1 ) hrgn = hrgnRet; else hrgnRet = 0; /* entire client */
if( wndPtr->flags & WIN_NEEDS_ERASEBKGND )
{
if( bIcon ) dcx |= DCX_WINDOW;
else
if( hrgnRet )
OffsetRgn( hrgnRet, wndPtr->rectWindow.left - wndPtr->rectClient.left,
wndPtr->rectWindow.top - wndPtr->rectClient.top);
else
dcx &= ~DCX_INTERSECTRGN;
if (( hDC = GetDCEx( hWnd, hrgnRet, dcx )) )
{
if (SendMessageW( hWnd, WM_ERASEBKGND, (WPARAM)hDC, 0 ))
wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
ReleaseDC( hWnd, hDC );
}
}
}
}
if( !IsWindow(hWnd) ) return hrgn;
/* ... and its child windows */
if(!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) )
{
HWND *list, *phwnd;
if( (list = WIN_ListChildren( wndPtr->hwndSelf )) )
{
for (phwnd = list; *phwnd; phwnd++)
{
if (!(wndPtr = WIN_FindWndPtr( *phwnd ))) continue;
if ( (wndPtr->dwStyle & WS_VISIBLE) &&
(wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT)) )
hrgn = RDW_Paint( wndPtr, hrgn, flags, ex );
WIN_ReleaseWndPtr(wndPtr);
}
HeapFree( GetProcessHeap(), 0, list );
}
}
return hrgn;
}
/***********************************************************************
* dump_rdw_flags
*/
static void dump_rdw_flags(UINT flags)
{
TRACE("flags:");
if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE");
if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT");
if (flags & RDW_ERASE) TRACE(" RDW_ERASE");
if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE");
if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT");
if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE");
if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN");
if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN");
if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW");
if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW");
if (flags & RDW_FRAME) TRACE(" RDW_FRAME");
if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME");
#define RDW_FLAGS \
(RDW_INVALIDATE | \
RDW_INTERNALPAINT | \
RDW_ERASE | \
RDW_VALIDATE | \
RDW_NOINTERNALPAINT | \
RDW_NOERASE | \
RDW_NOCHILDREN | \
RDW_ALLCHILDREN | \
RDW_UPDATENOW | \
RDW_ERASENOW | \
RDW_FRAME | \
RDW_NOFRAME)
if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS);
TRACE("\n");
#undef RDW_FLAGS
}
/***********************************************************************
* RedrawWindow (USER32.@)
*/
BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rectUpdate,
HRGN hrgnUpdate, UINT flags )
{
HRGN hRgn = 0;
RECT r, r2;
POINT pt;
WND* wndPtr;
if (!hwnd) hwnd = GetDesktopWindow();
/* check if the window or its parents are visible/not minimized */
if (!WIN_IsWindowDrawable( hwnd, !(flags & RDW_FRAME) )) return TRUE;
/* process pending events and messages before painting */
if (flags & RDW_UPDATENOW)
MsgWaitForMultipleObjects( 0, NULL, FALSE, 0, QS_ALLINPUT );
if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
if (TRACE_ON(win))
{
if( hrgnUpdate )
{
GetRgnBox( hrgnUpdate, &r );
TRACE( "%p (%p) NULL %p box (%ld,%ld-%ld,%ld) flags=%04x\n",
hwnd, wndPtr->hrgnUpdate, hrgnUpdate, r.left, r.top, r.right, r.bottom, flags );
}
else
{
if( rectUpdate )
r = *rectUpdate;
else
SetRectEmpty( &r );
TRACE( "%p (%p) %s %ld,%ld-%ld,%ld %p flags=%04x\n",
hwnd, wndPtr->hrgnUpdate, rectUpdate ? "rect" : "NULL", r.left,
r.top, r.right, r.bottom, hrgnUpdate, flags );
}
dump_rdw_flags(flags);
}
/* prepare an update region in window coordinates */
if (((flags & (RDW_INVALIDATE|RDW_FRAME)) == (RDW_INVALIDATE|RDW_FRAME)) ||
((flags & (RDW_VALIDATE|RDW_NOFRAME)) == (RDW_VALIDATE|RDW_NOFRAME)))
r = wndPtr->rectWindow;
else
r = wndPtr->rectClient;
pt.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
pt.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
OffsetRect( &r, -wndPtr->rectClient.left, -wndPtr->rectClient.top );
if (flags & RDW_INVALIDATE) /* ------------------------- Invalidate */
{
/* If the window doesn't have hrgnUpdate we leave hRgn zero
* and put a new region straight into wndPtr->hrgnUpdate
* so that RDW_UpdateRgns() won't have to do any extra work.
*/
if( hrgnUpdate )
{
if( wndPtr->hrgnUpdate )
{
hRgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( hRgn, hrgnUpdate, 0, RGN_COPY );
OffsetRgn( hRgn, pt.x, pt.y );
}
else
{
wndPtr->hrgnUpdate = crop_rgn( 0, hrgnUpdate, &r );
OffsetRgn( wndPtr->hrgnUpdate, pt.x, pt.y );
}
}
else if( rectUpdate )
{
if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
OffsetRect( &r2, pt.x, pt.y );
if( wndPtr->hrgnUpdate == 0 )
wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
else
hRgn = CreateRectRgnIndirect( &r2 );
}
else /* entire window or client depending on RDW_FRAME */
{
if( flags & RDW_FRAME )
{
if (wndPtr->hrgnUpdate) hRgn = (HRGN)1;
else wndPtr->hrgnUpdate = (HRGN)1;
}
else
{
GETCLIENTRECTW( wndPtr, r2 );
if( wndPtr->hrgnUpdate == 0 )
wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
else
hRgn = CreateRectRgnIndirect( &r2 );
}
}
}
else if (flags & RDW_VALIDATE) /* ------------------------- Validate */
{
/* In this we cannot leave with zero hRgn */
if( hrgnUpdate )
{
hRgn = crop_rgn( hRgn, hrgnUpdate, &r );
OffsetRgn( hRgn, pt.x, pt.y );
GetRgnBox( hRgn, &r2 );
if( IsRectEmpty( &r2 ) ) goto END;
}
else if( rectUpdate )
{
if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
OffsetRect( &r2, pt.x, pt.y );
hRgn = CreateRectRgnIndirect( &r2 );
}
else /* entire window or client depending on RDW_NOFRAME */
{
if( flags & RDW_NOFRAME )
hRgn = (HRGN)1;
else
{
GETCLIENTRECTW( wndPtr, r2 );
hRgn = CreateRectRgnIndirect( &r2 );
}
}
}
/* At this point hRgn is either an update region in window coordinates or 1 or 0 */
RDW_UpdateRgns( wndPtr, hRgn, flags, TRUE );
/* Erase/update windows, from now on hRgn is a scratch region */
hRgn = RDW_Paint( wndPtr, (hRgn == (HRGN)1) ? 0 : hRgn, flags, 0 );
END:
if( hRgn > (HRGN)1 && (hRgn != hrgnUpdate) )
DeleteObject(hRgn );
WIN_ReleaseWndPtr(wndPtr);
return TRUE;
}
/***********************************************************************
* UpdateWindow (USER32.@)
*/
BOOL WINAPI UpdateWindow( HWND hwnd )
{
return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
}
/***********************************************************************
* InvalidateRgn (USER32.@)
*/
BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
}
/***********************************************************************
* InvalidateRect (USER32.@)
*/
BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
{
return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
}
/***********************************************************************
* ValidateRgn (USER32.@)
*/
BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
{
return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
}
/***********************************************************************
* ValidateRect (USER32.@)
*/
BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect )
{
return RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
}
/***********************************************************************
* SelectPalette (Not a Windows API)
*/
HPALETTE WINAPI SelectPalette( HDC hDC, HPALETTE hPal, BOOL bForceBackground )
{
WORD wBkgPalette = 1;
if (!bForceBackground && (hPal != GetStockObject(DEFAULT_PALETTE)))
{
HWND hwnd = WindowFromDC( hDC );
if (hwnd)
{
HWND hForeground = GetForegroundWindow();
/* set primary palette if it's related to current active */
if (hForeground == hwnd || IsChild(hForeground,hwnd)) wBkgPalette = 0;
}
}
return pfnGDISelectPalette( hDC, hPal, wBkgPalette);
}
/***********************************************************************
* UserRealizePalette (USER32.@)
*/
UINT WINAPI UserRealizePalette( HDC hDC )
{
UINT realized = pfnGDIRealizePalette( hDC );
/* do not send anything if no colors were changed */
if (realized && IsDCCurrentPalette16( HDC_16(hDC) ))
{
/* send palette change notification */
HWND hWnd = WindowFromDC( hDC );
if (hWnd) SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0,
SMTO_ABORTIFHUNG, 2000, NULL );
}
return realized;
}
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