2 * Window painting functions
4 * Copyright 1993, 1994, 1995, 2001, 2004, 2005, 2008 Alexandre Julliard
5 * Copyright 1996, 1997, 1999 Alex Korobka
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
27 #define WIN32_NO_STATUS
28 #include "user_private.h"
31 #include "wine/server.h"
32 #include "wine/list.h"
33 #include "wine/debug.h"
35 WINE_DEFAULT_DEBUG_CHANNEL(win
);
40 struct list entry
; /* entry in global DCE list */
45 LONG count
; /* usage count; 0 or 1 for cache DCEs, always 1 for window DCEs,
46 always >= 1 for class DCEs */
49 static struct list dce_list
= LIST_INIT(dce_list
);
51 #define DCE_CACHE_SIZE 64
53 static BOOL CALLBACK
dc_hook( HDC hDC
, WORD code
, DWORD_PTR data
, LPARAM lParam
);
56 /***********************************************************************
59 static void dump_rdw_flags(UINT flags
)
62 if (flags
& RDW_INVALIDATE
) TRACE(" RDW_INVALIDATE");
63 if (flags
& RDW_INTERNALPAINT
) TRACE(" RDW_INTERNALPAINT");
64 if (flags
& RDW_ERASE
) TRACE(" RDW_ERASE");
65 if (flags
& RDW_VALIDATE
) TRACE(" RDW_VALIDATE");
66 if (flags
& RDW_NOINTERNALPAINT
) TRACE(" RDW_NOINTERNALPAINT");
67 if (flags
& RDW_NOERASE
) TRACE(" RDW_NOERASE");
68 if (flags
& RDW_NOCHILDREN
) TRACE(" RDW_NOCHILDREN");
69 if (flags
& RDW_ALLCHILDREN
) TRACE(" RDW_ALLCHILDREN");
70 if (flags
& RDW_UPDATENOW
) TRACE(" RDW_UPDATENOW");
71 if (flags
& RDW_ERASENOW
) TRACE(" RDW_ERASENOW");
72 if (flags
& RDW_FRAME
) TRACE(" RDW_FRAME");
73 if (flags
& RDW_NOFRAME
) TRACE(" RDW_NOFRAME");
80 RDW_NOINTERNALPAINT | \
89 if (flags
& ~RDW_FLAGS
) TRACE(" %04x", flags
& ~RDW_FLAGS
);
95 /***********************************************************************
96 * update_visible_region
98 * Set the visible region and X11 drawable for the DC associated to
101 static void update_visible_region( struct dce
*dce
)
103 struct window_surface
*surface
= NULL
;
107 DWORD flags
= dce
->flags
;
108 DWORD paint_flags
= 0;
110 RECT win_rect
, top_rect
;
113 /* don't clip siblings if using parent clip region */
114 if (flags
& DCX_PARENTCLIP
) flags
&= ~DCX_CLIPSIBLINGS
;
116 /* fetch the visible region from the server */
119 RGNDATA
*data
= HeapAlloc( GetProcessHeap(), 0, sizeof(*data
) + size
- 1 );
122 SERVER_START_REQ( get_visible_region
)
124 req
->window
= wine_server_user_handle( dce
->hwnd
);
126 wine_server_set_reply( req
, data
->Buffer
, size
);
127 if (!(status
= wine_server_call( req
)))
129 size_t reply_size
= wine_server_reply_size( reply
);
130 data
->rdh
.dwSize
= sizeof(data
->rdh
);
131 data
->rdh
.iType
= RDH_RECTANGLES
;
132 data
->rdh
.nCount
= reply_size
/ sizeof(RECT
);
133 data
->rdh
.nRgnSize
= reply_size
;
134 vis_rgn
= ExtCreateRegion( NULL
, data
->rdh
.dwSize
+ data
->rdh
.nRgnSize
, data
);
136 top_win
= wine_server_ptr_handle( reply
->top_win
);
137 win_rect
.left
= reply
->win_rect
.left
;
138 win_rect
.top
= reply
->win_rect
.top
;
139 win_rect
.right
= reply
->win_rect
.right
;
140 win_rect
.bottom
= reply
->win_rect
.bottom
;
141 top_rect
.left
= reply
->top_rect
.left
;
142 top_rect
.top
= reply
->top_rect
.top
;
143 top_rect
.right
= reply
->top_rect
.right
;
144 top_rect
.bottom
= reply
->top_rect
.bottom
;
145 paint_flags
= reply
->paint_flags
;
147 else size
= reply
->total_size
;
150 HeapFree( GetProcessHeap(), 0, data
);
151 } while (status
== STATUS_BUFFER_OVERFLOW
);
153 if (status
|| !vis_rgn
) return;
155 USER_Driver
->pGetDC( dce
->hdc
, dce
->hwnd
, top_win
, &win_rect
, &top_rect
, flags
);
157 if (dce
->clip_rgn
) CombineRgn( vis_rgn
, vis_rgn
, dce
->clip_rgn
,
158 (flags
& DCX_INTERSECTRGN
) ? RGN_AND
: RGN_DIFF
);
160 /* don't use a surface to paint the client area of OpenGL windows */
161 if (!(paint_flags
& SET_WINPOS_PIXEL_FORMAT
) || (flags
& DCX_WINDOW
))
163 win
= WIN_GetPtr( top_win
);
164 if (win
&& win
!= WND_DESKTOP
&& win
!= WND_OTHER_PROCESS
)
166 surface
= win
->surface
;
167 if (surface
) window_surface_add_ref( surface
);
168 WIN_ReleasePtr( win
);
172 if (!surface
) SetRectEmpty( &top_rect
);
173 __wine_set_visible_region( dce
->hdc
, vis_rgn
, &win_rect
, &top_rect
, surface
);
174 if (surface
) window_surface_release( surface
);
178 /***********************************************************************
181 static void release_dce( struct dce
*dce
)
183 if (!dce
->hwnd
) return; /* already released */
185 __wine_set_visible_region( dce
->hdc
, 0, &dummy_surface
.rect
, &dummy_surface
.rect
, &dummy_surface
);
186 USER_Driver
->pReleaseDC( dce
->hwnd
, dce
->hdc
);
188 if (dce
->clip_rgn
) DeleteObject( dce
->clip_rgn
);
191 dce
->flags
&= DCX_CACHE
;
195 /***********************************************************************
198 static void delete_clip_rgn( struct dce
*dce
)
200 if (!dce
->clip_rgn
) return; /* nothing to do */
202 dce
->flags
&= ~(DCX_EXCLUDERGN
| DCX_INTERSECTRGN
);
203 DeleteObject( dce
->clip_rgn
);
206 /* make it dirty so that the vis rgn gets recomputed next time */
207 SetHookFlags( dce
->hdc
, DCHF_INVALIDATEVISRGN
);
211 /***********************************************************************
214 * Allocate a new DCE.
216 static struct dce
*alloc_dce(void)
220 if (!(dce
= HeapAlloc( GetProcessHeap(), 0, sizeof(*dce
) ))) return NULL
;
221 if (!(dce
->hdc
= CreateDCW( L
"DISPLAY", NULL
, NULL
, NULL
)))
223 HeapFree( GetProcessHeap(), 0, dce
);
231 /* store DCE handle in DC hook data field */
232 SetDCHook( dce
->hdc
, dc_hook
, (DWORD_PTR
)dce
);
233 SetHookFlags( dce
->hdc
, DCHF_INVALIDATEVISRGN
);
238 /***********************************************************************
241 static struct dce
*get_window_dce( HWND hwnd
)
244 WND
*win
= WIN_GetPtr( hwnd
);
246 if (!win
|| win
== WND_OTHER_PROCESS
|| win
== WND_DESKTOP
) return NULL
;
249 if (!dce
&& (dce
= get_class_dce( win
->class )))
254 WIN_ReleasePtr( win
);
256 if (!dce
) /* try to allocate one */
258 struct dce
*dce_to_free
= NULL
;
259 LONG class_style
= GetClassLongW( hwnd
, GCL_STYLE
);
261 if (class_style
& CS_CLASSDC
)
263 if (!(dce
= alloc_dce())) return NULL
;
265 win
= WIN_GetPtr( hwnd
);
266 if (win
&& win
!= WND_OTHER_PROCESS
&& win
!= WND_DESKTOP
)
268 if (win
->dce
) /* another thread beat us to it */
273 else if ((win
->dce
= set_class_dce( win
->class, dce
)) != dce
)
282 list_add_tail( &dce_list
, &dce
->entry
);
284 WIN_ReleasePtr( win
);
286 else dce_to_free
= dce
;
288 else if (class_style
& CS_OWNDC
)
290 if (!(dce
= alloc_dce())) return NULL
;
292 win
= WIN_GetPtr( hwnd
);
293 if (win
&& win
!= WND_OTHER_PROCESS
&& win
!= WND_DESKTOP
)
295 if (win
->dwStyle
& WS_CLIPCHILDREN
) dce
->flags
|= DCX_CLIPCHILDREN
;
296 if (win
->dwStyle
& WS_CLIPSIBLINGS
) dce
->flags
|= DCX_CLIPSIBLINGS
;
297 if (win
->dce
) /* another thread beat us to it */
306 list_add_tail( &dce_list
, &dce
->entry
);
308 WIN_ReleasePtr( win
);
310 else dce_to_free
= dce
;
315 SetDCHook( dce_to_free
->hdc
, NULL
, 0 );
316 DeleteDC( dce_to_free
->hdc
);
317 HeapFree( GetProcessHeap(), 0, dce_to_free
);
318 if (dce_to_free
== dce
)
326 /***********************************************************************
329 * Free a class or window DCE.
331 void free_dce( struct dce
*dce
, HWND hwnd
)
333 struct dce
*dce_to_free
= NULL
;
342 list_remove( &dce
->entry
);
345 else if (dce
->hwnd
== hwnd
)
351 /* now check for cache DCEs */
355 LIST_FOR_EACH_ENTRY( dce
, &dce_list
, struct dce
, entry
)
357 if (dce
->hwnd
!= hwnd
) continue;
358 if (!(dce
->flags
& DCX_CACHE
)) break;
363 WARN( "GetDC() without ReleaseDC() for window %p\n", hwnd
);
365 SetHookFlags( dce
->hdc
, DCHF_DISABLEDC
);
374 SetDCHook( dce_to_free
->hdc
, NULL
, 0 );
375 DeleteDC( dce_to_free
->hdc
);
376 HeapFree( GetProcessHeap(), 0, dce_to_free
);
381 /***********************************************************************
384 * Mark the associated DC as dirty to force a refresh of the visible region
386 static void make_dc_dirty( struct dce
*dce
)
390 /* Don't bother with visible regions of unused DCEs */
391 TRACE("purged %p hwnd %p\n", dce
->hdc
, dce
->hwnd
);
396 /* Set dirty bits in the hDC and DCE structs */
397 TRACE("fixed up %p hwnd %p\n", dce
->hdc
, dce
->hwnd
);
398 SetHookFlags( dce
->hdc
, DCHF_INVALIDATEVISRGN
);
403 /***********************************************************************
406 * It is called from SetWindowPos() - we have to
407 * mark as dirty all busy DCEs for windows that have pWnd->parent as
408 * an ancestor and whose client rect intersects with specified update
409 * rectangle. In addition, pWnd->parent DCEs may need to be updated if
410 * DCX_CLIPCHILDREN flag is set.
412 void invalidate_dce( WND
*win
, const RECT
*extra_rect
)
414 DPI_AWARENESS_CONTEXT context
;
418 if (!win
->parent
) return;
420 context
= SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( win
->obj
.handle
));
422 GetWindowRect( win
->obj
.handle
, &window_rect
);
424 TRACE("%p parent %p %s (%s)\n",
425 win
->obj
.handle
, win
->parent
, wine_dbgstr_rect(&window_rect
), wine_dbgstr_rect(extra_rect
) );
427 /* walk all DCEs and fixup non-empty entries */
429 LIST_FOR_EACH_ENTRY( dce
, &dce_list
, struct dce
, entry
)
431 if (!dce
->hwnd
) continue;
433 TRACE( "%p: hwnd %p dcx %08x %s %s\n", dce
->hdc
, dce
->hwnd
, dce
->flags
,
434 (dce
->flags
& DCX_CACHE
) ? "Cache" : "Owned", dce
->count
? "InUse" : "" );
436 if ((dce
->hwnd
== win
->parent
) && !(dce
->flags
& DCX_CLIPCHILDREN
))
437 continue; /* child window positions don't bother us */
439 /* if DCE window is a child of hwnd, it has to be invalidated */
440 if (dce
->hwnd
== win
->obj
.handle
|| IsChild( win
->obj
.handle
, dce
->hwnd
))
442 make_dc_dirty( dce
);
446 /* otherwise check if the window rectangle intersects this DCE window */
447 if (win
->parent
== dce
->hwnd
|| IsChild( win
->parent
, dce
->hwnd
))
450 GetWindowRect( dce
->hwnd
, &dce_rect
);
451 if (IntersectRect( &tmp
, &dce_rect
, &window_rect
) ||
452 (extra_rect
&& IntersectRect( &tmp
, &dce_rect
, extra_rect
)))
453 make_dc_dirty( dce
);
456 SetThreadDpiAwarenessContext( context
);
459 /***********************************************************************
462 * Implementation of ReleaseDC.
464 static INT
release_dc( HWND hwnd
, HDC hdc
, BOOL end_paint
)
469 TRACE("%p %p\n", hwnd
, hdc
);
472 dce
= (struct dce
*)GetDCHook( hdc
, NULL
);
473 if (dce
&& dce
->count
&& dce
->hwnd
)
475 if (!(dce
->flags
& DCX_NORESETATTRS
)) SetHookFlags( dce
->hdc
, DCHF_RESETDC
);
476 if (end_paint
|| (dce
->flags
& DCX_CACHE
)) delete_clip_rgn( dce
);
477 if (dce
->flags
& DCX_CACHE
)
480 SetHookFlags( dce
->hdc
, DCHF_DISABLEDC
);
489 /***********************************************************************
492 * See "Undoc. Windows" for hints (DC, SetDCHook, SetHookFlags)..
494 static BOOL CALLBACK
dc_hook( HDC hDC
, WORD code
, DWORD_PTR data
, LPARAM lParam
)
497 struct dce
*dce
= (struct dce
*)data
;
499 TRACE("hDC = %p, %u\n", hDC
, code
);
501 if (!dce
) return FALSE
;
502 assert( dce
->hdc
== hDC
);
506 case DCHC_INVALIDVISRGN
:
507 /* GDI code calls this when it detects that the
508 * DC is dirty (usually after SetHookFlags()). This
509 * means that we have to recompute the visible region.
511 if (dce
->count
) update_visible_region( dce
);
512 else /* non-fatal but shouldn't happen */
513 WARN("DC is not in use!\n");
517 if (!(dce
->flags
& DCX_CACHE
))
519 WARN("Application trying to delete an owned DC %p\n", dce
->hdc
);
524 list_remove( &dce
->entry
);
525 if (dce
->clip_rgn
) DeleteObject( dce
->clip_rgn
);
526 HeapFree( GetProcessHeap(), 0, dce
);
535 /***********************************************************************
538 * Return update region (in screen coordinates) for a window.
540 static HRGN
get_update_region( HWND hwnd
, UINT
*flags
, HWND
*child
)
549 if (!(data
= HeapAlloc( GetProcessHeap(), 0, sizeof(*data
) + size
- 1 )))
551 SetLastError( ERROR_OUTOFMEMORY
);
555 SERVER_START_REQ( get_update_region
)
557 req
->window
= wine_server_user_handle( hwnd
);
558 req
->from_child
= wine_server_user_handle( child
? *child
: 0 );
560 wine_server_set_reply( req
, data
->Buffer
, size
);
561 if (!(status
= wine_server_call( req
)))
563 size_t reply_size
= wine_server_reply_size( reply
);
564 data
->rdh
.dwSize
= sizeof(data
->rdh
);
565 data
->rdh
.iType
= RDH_RECTANGLES
;
566 data
->rdh
.nCount
= reply_size
/ sizeof(RECT
);
567 data
->rdh
.nRgnSize
= reply_size
;
568 hrgn
= ExtCreateRegion( NULL
, data
->rdh
.dwSize
+ data
->rdh
.nRgnSize
, data
);
569 if (child
) *child
= wine_server_ptr_handle( reply
->child
);
570 *flags
= reply
->flags
;
572 else size
= reply
->total_size
;
575 HeapFree( GetProcessHeap(), 0, data
);
576 } while (status
== STATUS_BUFFER_OVERFLOW
);
578 if (status
) SetLastError( RtlNtStatusToDosError(status
) );
583 /***********************************************************************
586 * Get only the update flags, not the update region.
588 static BOOL
get_update_flags( HWND hwnd
, HWND
*child
, UINT
*flags
)
592 SERVER_START_REQ( get_update_region
)
594 req
->window
= wine_server_user_handle( hwnd
);
595 req
->from_child
= wine_server_user_handle( child
? *child
: 0 );
596 req
->flags
= *flags
| UPDATE_NOREGION
;
597 if ((ret
= !wine_server_call_err( req
)))
599 if (child
) *child
= wine_server_ptr_handle( reply
->child
);
600 *flags
= reply
->flags
;
608 /***********************************************************************
609 * redraw_window_rects
611 * Redraw part of a window.
613 static BOOL
redraw_window_rects( HWND hwnd
, UINT flags
, const RECT
*rects
, UINT count
)
617 if (!(flags
& (RDW_INVALIDATE
|RDW_VALIDATE
|RDW_INTERNALPAINT
|RDW_NOINTERNALPAINT
)))
618 return TRUE
; /* nothing to do */
620 SERVER_START_REQ( redraw_window
)
622 req
->window
= wine_server_user_handle( hwnd
);
624 wine_server_add_data( req
, rects
, count
* sizeof(RECT
) );
625 ret
= !wine_server_call_err( req
);
632 /***********************************************************************
635 * Send a WM_NCPAINT message if needed, and return the resulting update region (in screen coords).
636 * Helper for erase_now and BeginPaint.
638 static HRGN
send_ncpaint( HWND hwnd
, HWND
*child
, UINT
*flags
)
640 HRGN whole_rgn
= get_update_region( hwnd
, flags
, child
);
644 if (child
) hwnd
= *child
;
646 if (hwnd
== GetDesktopWindow()) return whole_rgn
;
650 DPI_AWARENESS_CONTEXT context
;
651 RECT client
, window
, update
;
654 context
= SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( hwnd
));
656 /* check if update rgn overlaps with nonclient area */
657 type
= GetRgnBox( whole_rgn
, &update
);
658 WIN_GetRectangles( hwnd
, COORDS_SCREEN
, &window
, &client
);
660 if ((*flags
& UPDATE_NONCLIENT
) ||
661 update
.left
< client
.left
|| update
.top
< client
.top
||
662 update
.right
> client
.right
|| update
.bottom
> client
.bottom
)
664 client_rgn
= CreateRectRgnIndirect( &client
);
665 CombineRgn( client_rgn
, client_rgn
, whole_rgn
, RGN_AND
);
667 /* check if update rgn contains complete nonclient area */
668 if (type
== SIMPLEREGION
&& EqualRect( &window
, &update
))
670 DeleteObject( whole_rgn
);
676 client_rgn
= whole_rgn
;
680 if (whole_rgn
) /* NOTE: WM_NCPAINT allows wParam to be 1 */
682 if (*flags
& UPDATE_NONCLIENT
)
684 /* Mark standard scroll bars as not painted before sending WM_NCPAINT */
685 style
= GetWindowLongW( hwnd
, GWL_STYLE
);
686 if (style
& WS_HSCROLL
)
687 SCROLL_SetStandardScrollPainted( hwnd
, SB_HORZ
, FALSE
);
688 if (style
& WS_VSCROLL
)
689 SCROLL_SetStandardScrollPainted( hwnd
, SB_VERT
, FALSE
);
691 SendMessageW( hwnd
, WM_NCPAINT
, (WPARAM
)whole_rgn
, 0 );
693 if (whole_rgn
> (HRGN
)1) DeleteObject( whole_rgn
);
695 SetThreadDpiAwarenessContext( context
);
701 /***********************************************************************
704 * Send a WM_ERASEBKGND message if needed, and optionally return the DC for painting.
705 * If a DC is requested, the region is selected into it. In all cases the region is deleted.
706 * Helper for erase_now and BeginPaint.
708 static BOOL
send_erase( HWND hwnd
, UINT flags
, HRGN client_rgn
,
709 RECT
*clip_rect
, HDC
*hdc_ret
)
711 BOOL need_erase
= (flags
& UPDATE_DELAYED_ERASE
) != 0;
715 if (!clip_rect
) clip_rect
= &dummy
;
716 if (hdc_ret
|| (flags
& UPDATE_ERASE
))
718 UINT dcx_flags
= DCX_INTERSECTRGN
| DCX_USESTYLE
;
719 if (IsIconic(hwnd
)) dcx_flags
|= DCX_WINDOW
;
721 if ((hdc
= GetDCEx( hwnd
, client_rgn
, dcx_flags
)))
723 INT type
= GetClipBox( hdc
, clip_rect
);
725 if (flags
& UPDATE_ERASE
)
727 /* don't erase if the clip box is empty */
728 if (type
!= NULLREGION
)
729 need_erase
= !SendMessageW( hwnd
, WM_ERASEBKGND
, (WPARAM
)hdc
, 0 );
731 if (!hdc_ret
) release_dc( hwnd
, hdc
, TRUE
);
734 if (hdc_ret
) *hdc_ret
= hdc
;
736 if (!hdc
) DeleteObject( client_rgn
);
741 /***********************************************************************
744 * Implementation of RDW_ERASENOW behavior.
746 void erase_now( HWND hwnd
, UINT rdw_flags
)
750 BOOL need_erase
= FALSE
;
752 /* loop while we find a child to repaint */
755 UINT flags
= UPDATE_NONCLIENT
| UPDATE_ERASE
;
757 if (rdw_flags
& RDW_NOCHILDREN
) flags
|= UPDATE_NOCHILDREN
;
758 else if (rdw_flags
& RDW_ALLCHILDREN
) flags
|= UPDATE_ALLCHILDREN
;
759 if (need_erase
) flags
|= UPDATE_DELAYED_ERASE
;
761 if (!(hrgn
= send_ncpaint( hwnd
, &child
, &flags
))) break;
762 need_erase
= send_erase( child
, flags
, hrgn
, NULL
, NULL
);
764 if (!flags
) break; /* nothing more to do */
765 if ((rdw_flags
& RDW_NOCHILDREN
) && !need_erase
) break;
770 /***********************************************************************
771 * copy_bits_from_surface
773 * Copy bits from a window surface; helper for move_window_bits and move_window_bits_parent.
775 static void copy_bits_from_surface( HWND hwnd
, struct window_surface
*surface
,
776 const RECT
*dst
, const RECT
*src
)
778 char buffer
[FIELD_OFFSET( BITMAPINFO
, bmiColors
[256] )];
779 BITMAPINFO
*info
= (BITMAPINFO
*)buffer
;
781 UINT flags
= UPDATE_NOCHILDREN
| UPDATE_CLIPCHILDREN
;
782 HRGN rgn
= get_update_region( hwnd
, &flags
, NULL
);
783 HDC hdc
= GetDCEx( hwnd
, rgn
, DCX_CACHE
| DCX_WINDOW
| DCX_EXCLUDERGN
);
785 bits
= surface
->funcs
->get_info( surface
, info
);
786 surface
->funcs
->lock( surface
);
787 SetDIBitsToDevice( hdc
, dst
->left
, dst
->top
, dst
->right
- dst
->left
, dst
->bottom
- dst
->top
,
788 src
->left
- surface
->rect
.left
, surface
->rect
.bottom
- src
->bottom
,
789 0, surface
->rect
.bottom
- surface
->rect
.top
,
790 bits
, info
, DIB_RGB_COLORS
);
791 surface
->funcs
->unlock( surface
);
792 ReleaseDC( hwnd
, hdc
);
796 /***********************************************************************
799 * Move the window bits when a window is resized or its surface recreated.
801 void move_window_bits( HWND hwnd
, struct window_surface
*old_surface
,
802 struct window_surface
*new_surface
,
803 const RECT
*visible_rect
, const RECT
*old_visible_rect
,
804 const RECT
*window_rect
, const RECT
*valid_rects
)
806 RECT dst
= valid_rects
[0];
807 RECT src
= valid_rects
[1];
809 if (new_surface
!= old_surface
||
810 src
.left
- old_visible_rect
->left
!= dst
.left
- visible_rect
->left
||
811 src
.top
- old_visible_rect
->top
!= dst
.top
- visible_rect
->top
)
813 TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src
), wine_dbgstr_rect( &dst
));
814 OffsetRect( &src
, -old_visible_rect
->left
, -old_visible_rect
->top
);
815 OffsetRect( &dst
, -window_rect
->left
, -window_rect
->top
);
816 copy_bits_from_surface( hwnd
, old_surface
, &dst
, &src
);
821 /***********************************************************************
822 * move_window_bits_parent
824 * Move the window bits in the parent surface when a child is moved.
826 void move_window_bits_parent( HWND hwnd
, HWND parent
, const RECT
*window_rect
, const RECT
*valid_rects
)
828 struct window_surface
*surface
;
829 RECT dst
= valid_rects
[0];
830 RECT src
= valid_rects
[1];
833 if (src
.left
== dst
.left
&& src
.top
== dst
.top
) return;
835 if (!(win
= WIN_GetPtr( parent
))) return;
836 if (win
== WND_DESKTOP
|| win
== WND_OTHER_PROCESS
) return;
837 if (!(surface
= win
->surface
))
839 WIN_ReleasePtr( win
);
843 TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src
), wine_dbgstr_rect( &dst
));
844 MapWindowPoints( GetAncestor( hwnd
, GA_PARENT
), parent
, (POINT
*)&src
, 2 );
845 OffsetRect( &src
, win
->client_rect
.left
- win
->visible_rect
.left
,
846 win
->client_rect
.top
- win
->visible_rect
.top
);
847 OffsetRect( &dst
, -window_rect
->left
, -window_rect
->top
);
848 window_surface_add_ref( surface
);
849 WIN_ReleasePtr( win
);
851 copy_bits_from_surface( hwnd
, surface
, &dst
, &src
);
852 window_surface_release( surface
);
856 /***********************************************************************
859 * Implementation of RDW_UPDATENOW behavior.
861 static void update_now( HWND hwnd
, UINT rdw_flags
)
865 /* desktop window never gets WM_PAINT, only WM_ERASEBKGND */
866 if (hwnd
== GetDesktopWindow()) erase_now( hwnd
, rdw_flags
| RDW_NOCHILDREN
);
868 /* loop while we find a child to repaint */
871 UINT flags
= UPDATE_PAINT
| UPDATE_INTERNALPAINT
;
873 if (rdw_flags
& RDW_NOCHILDREN
) flags
|= UPDATE_NOCHILDREN
;
874 else if (rdw_flags
& RDW_ALLCHILDREN
) flags
|= UPDATE_ALLCHILDREN
;
876 if (!get_update_flags( hwnd
, &child
, &flags
)) break;
877 if (!flags
) break; /* nothing more to do */
879 SendMessageW( child
, WM_PAINT
, 0, 0 );
880 if (rdw_flags
& RDW_NOCHILDREN
) break;
885 /*************************************************************************
888 * Helper for ScrollWindowEx:
889 * If the return value is 0, no special caret handling is necessary.
890 * Otherwise the return value is the handle of the window that owns the
891 * caret. Its caret needs to be hidden during the scroll operation and
892 * moved to new_caret_pos if move_caret is TRUE.
894 static HWND
fix_caret(HWND hWnd
, const RECT
*scroll_rect
, INT dx
, INT dy
,
895 UINT flags
, LPBOOL move_caret
, LPPOINT new_caret_pos
)
898 RECT rect
, mapped_rcCaret
;
900 info
.cbSize
= sizeof(info
);
901 if (!GetGUIThreadInfo( GetCurrentThreadId(), &info
)) return 0;
902 if (!info
.hwndCaret
) return 0;
904 mapped_rcCaret
= info
.rcCaret
;
905 if (info
.hwndCaret
== hWnd
)
907 /* The caret needs to be moved along with scrolling even if it's
908 * outside the visible area. Otherwise, when the caret is scrolled
909 * out from the view, the position won't get updated anymore and
910 * the caret will never scroll back again. */
912 new_caret_pos
->x
= info
.rcCaret
.left
+ dx
;
913 new_caret_pos
->y
= info
.rcCaret
.top
+ dy
;
918 if (!(flags
& SW_SCROLLCHILDREN
) || !IsChild(hWnd
, info
.hwndCaret
))
920 MapWindowPoints(info
.hwndCaret
, hWnd
, (LPPOINT
)&mapped_rcCaret
, 2);
923 /* If the caret is not in the src/dest rects, all is fine done. */
924 if (!IntersectRect(&rect
, scroll_rect
, &mapped_rcCaret
))
927 OffsetRect(&rect
, dx
, dy
);
928 if (!IntersectRect(&rect
, &rect
, &mapped_rcCaret
))
932 /* Indicate that the caret needs to be updated during the scrolling. */
933 return info
.hwndCaret
;
937 /***********************************************************************
938 * BeginPaint (USER32.@)
940 HDC WINAPI
BeginPaint( HWND hwnd
, PAINTSTRUCT
*lps
)
946 UINT flags
= UPDATE_NONCLIENT
| UPDATE_ERASE
| UPDATE_PAINT
| UPDATE_INTERNALPAINT
| UPDATE_NOCHILDREN
;
950 if (!(hrgn
= send_ncpaint( hwnd
, NULL
, &flags
))) return 0;
952 erase
= send_erase( hwnd
, flags
, hrgn
, &rect
, &hdc
);
954 TRACE("hdc = %p box = (%s), fErase = %d\n", hdc
, wine_dbgstr_rect(&rect
), erase
);
958 release_dc( hwnd
, hdc
, TRUE
);
968 /***********************************************************************
969 * EndPaint (USER32.@)
971 BOOL WINAPI
EndPaint( HWND hwnd
, const PAINTSTRUCT
*lps
)
974 flush_window_surfaces( FALSE
);
975 if (!lps
) return FALSE
;
976 release_dc( hwnd
, lps
->hdc
, TRUE
);
981 /***********************************************************************
984 HDC WINAPI
GetDCEx( HWND hwnd
, HRGN hrgnClip
, DWORD flags
)
986 const DWORD clip_flags
= DCX_PARENTCLIP
| DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
| DCX_WINDOW
;
987 const DWORD user_flags
= clip_flags
| DCX_NORESETATTRS
; /* flags that can be set by user */
989 BOOL bUpdateVisRgn
= TRUE
;
991 LONG window_style
= GetWindowLongW( hwnd
, GWL_STYLE
);
993 if (!hwnd
) hwnd
= GetDesktopWindow();
994 else hwnd
= WIN_GetFullHandle( hwnd
);
996 TRACE("hwnd %p, hrgnClip %p, flags %08x\n", hwnd
, hrgnClip
, flags
);
998 if (!IsWindow(hwnd
)) return 0;
1002 if (flags
& (DCX_WINDOW
| DCX_PARENTCLIP
)) flags
|= DCX_CACHE
;
1004 if (flags
& DCX_USESTYLE
)
1006 flags
&= ~(DCX_CLIPCHILDREN
| DCX_CLIPSIBLINGS
| DCX_PARENTCLIP
);
1008 if (window_style
& WS_CLIPSIBLINGS
) flags
|= DCX_CLIPSIBLINGS
;
1010 if (!(flags
& DCX_WINDOW
))
1012 if (GetClassLongW( hwnd
, GCL_STYLE
) & CS_PARENTDC
) flags
|= DCX_PARENTCLIP
;
1014 if (window_style
& WS_CLIPCHILDREN
&& !(window_style
& WS_MINIMIZE
))
1015 flags
|= DCX_CLIPCHILDREN
;
1019 if (flags
& DCX_WINDOW
) flags
&= ~DCX_CLIPCHILDREN
;
1021 parent
= GetAncestor( hwnd
, GA_PARENT
);
1022 if (!parent
|| (parent
== GetDesktopWindow()))
1023 flags
= (flags
& ~DCX_PARENTCLIP
) | DCX_CLIPSIBLINGS
;
1025 /* it seems parent clip is ignored when clipping siblings or children */
1026 if (flags
& (DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
)) flags
&= ~DCX_PARENTCLIP
;
1028 if( flags
& DCX_PARENTCLIP
)
1030 LONG parent_style
= GetWindowLongW( parent
, GWL_STYLE
);
1031 if( (window_style
& WS_VISIBLE
) && (parent_style
& WS_VISIBLE
) )
1033 flags
&= ~DCX_CLIPCHILDREN
;
1034 if (parent_style
& WS_CLIPSIBLINGS
) flags
|= DCX_CLIPSIBLINGS
;
1038 /* find a suitable DCE */
1040 if ((flags
& DCX_CACHE
) || !(dce
= get_window_dce( hwnd
)))
1042 struct dce
*dceEmpty
= NULL
, *dceUnused
= NULL
, *found
= NULL
;
1043 unsigned int count
= 0;
1045 /* Strategy: First, we attempt to find a non-empty but unused DCE with
1046 * compatible flags. Next, we look for an empty entry. If the cache is
1047 * full we have to purge one of the unused entries.
1050 LIST_FOR_EACH_ENTRY( dce
, &dce_list
, struct dce
, entry
)
1052 if (!(dce
->flags
& DCX_CACHE
)) break;
1054 if (dce
->count
) continue;
1056 if (!dce
->hwnd
) dceEmpty
= dce
;
1057 else if ((dce
->hwnd
== hwnd
) && !((dce
->flags
^ flags
) & clip_flags
))
1059 TRACE( "found valid %p hwnd %p, flags %08x\n", dce
->hdc
, hwnd
, dce
->flags
);
1061 bUpdateVisRgn
= FALSE
;
1065 if (!found
) found
= dceEmpty
;
1066 if (!found
&& count
>= DCE_CACHE_SIZE
) found
= dceUnused
;
1072 SetHookFlags( dce
->hdc
, DCHF_ENABLEDC
);
1076 /* if there's no dce empty or unused, allocate a new one */
1079 if (!(dce
= alloc_dce())) return 0;
1080 dce
->flags
= DCX_CACHE
;
1082 list_add_head( &dce_list
, &dce
->entry
);
1088 flags
|= DCX_NORESETATTRS
;
1089 if (dce
->hwnd
!= hwnd
)
1091 /* we should free dce->clip_rgn here, but Windows apparently doesn't */
1092 dce
->flags
&= ~(DCX_EXCLUDERGN
| DCX_INTERSECTRGN
);
1095 else bUpdateVisRgn
= FALSE
; /* updated automatically, via DCHook() */
1098 if (flags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
))
1100 /* if the extra clip region has changed, get rid of the old one */
1101 if (dce
->clip_rgn
!= hrgnClip
|| ((flags
^ dce
->flags
) & (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
)))
1102 delete_clip_rgn( dce
);
1103 dce
->clip_rgn
= hrgnClip
;
1104 if (!dce
->clip_rgn
) dce
->clip_rgn
= CreateRectRgn( 0, 0, 0, 0 );
1105 dce
->flags
|= flags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
);
1106 bUpdateVisRgn
= TRUE
;
1109 if (GetWindowLongW( hwnd
, GWL_EXSTYLE
) & WS_EX_LAYOUTRTL
) SetLayout( dce
->hdc
, LAYOUT_RTL
);
1112 dce
->flags
= (dce
->flags
& ~user_flags
) | (flags
& user_flags
);
1114 /* cross-process invalidation is not supported yet, so always update the vis rgn */
1115 if (!WIN_IsCurrentProcess( hwnd
)) bUpdateVisRgn
= TRUE
;
1117 if (SetHookFlags( dce
->hdc
, DCHF_VALIDATEVISRGN
)) bUpdateVisRgn
= TRUE
; /* DC was dirty */
1119 if (bUpdateVisRgn
) update_visible_region( dce
);
1121 TRACE("(%p,%p,0x%x): returning %p%s\n", hwnd
, hrgnClip
, flags
, dce
->hdc
,
1122 bUpdateVisRgn
? " (updated)" : "");
1127 /***********************************************************************
1130 * Get a device context.
1133 * Success: Handle to the device context
1136 HDC WINAPI
GetDC( HWND hwnd
)
1138 if (!hwnd
) return GetDCEx( 0, 0, DCX_CACHE
| DCX_WINDOW
);
1139 return GetDCEx( hwnd
, 0, DCX_USESTYLE
);
1143 /***********************************************************************
1144 * GetWindowDC (USER32.@)
1146 HDC WINAPI
GetWindowDC( HWND hwnd
)
1148 return GetDCEx( hwnd
, 0, DCX_USESTYLE
| DCX_WINDOW
);
1152 /***********************************************************************
1153 * ReleaseDC (USER32.@)
1155 * Release a device context.
1158 * Success: Non-zero. Resources used by hdc are released.
1161 INT WINAPI
ReleaseDC( HWND hwnd
, HDC hdc
)
1163 return release_dc( hwnd
, hdc
, FALSE
);
1167 /**********************************************************************
1168 * WindowFromDC (USER32.@)
1170 HWND WINAPI
WindowFromDC( HDC hdc
)
1176 dce
= (struct dce
*)GetDCHook( hdc
, NULL
);
1177 if (dce
) hwnd
= dce
->hwnd
;
1183 /***********************************************************************
1184 * LockWindowUpdate (USER32.@)
1186 * Enables or disables painting in the chosen window.
1189 * hwnd [I] handle to a window.
1192 * If successful, returns nonzero value. Otherwise,
1196 * You can lock only one window at a time.
1198 BOOL WINAPI
LockWindowUpdate( HWND hwnd
)
1200 static HWND lockedWnd
;
1202 FIXME("(%p), partial stub!\n",hwnd
);
1209 /* Unlock lockedWnd */
1210 /* FIXME: Do something */
1214 /* Attempted to lock a second window */
1215 /* Return FALSE and do nothing */
1226 /***********************************************************************
1227 * RedrawWindow (USER32.@)
1229 BOOL WINAPI
RedrawWindow( HWND hwnd
, const RECT
*rect
, HRGN hrgn
, UINT flags
)
1231 static const RECT empty
;
1239 GetRgnBox( hrgn
, &r
);
1240 TRACE( "%p region %p box %s ", hwnd
, hrgn
, wine_dbgstr_rect(&r
) );
1243 TRACE( "%p rect %s ", hwnd
, wine_dbgstr_rect(rect
) );
1245 TRACE( "%p whole window ", hwnd
);
1247 dump_rdw_flags(flags
);
1250 /* process pending expose events before painting */
1251 if (flags
& RDW_UPDATENOW
) USER_Driver
->pMsgWaitForMultipleObjectsEx( 0, NULL
, 0, QS_PAINT
, 0 );
1255 if (IsRectEmpty( rect
)) rect
= &empty
;
1256 ret
= redraw_window_rects( hwnd
, flags
, rect
, 1 );
1260 ret
= redraw_window_rects( hwnd
, flags
, NULL
, 0 );
1262 else /* need to build a list of the region rectangles */
1267 if (!(size
= GetRegionData( hrgn
, 0, NULL
))) return FALSE
;
1268 if (!(data
= HeapAlloc( GetProcessHeap(), 0, size
))) return FALSE
;
1269 GetRegionData( hrgn
, size
, data
);
1270 if (!data
->rdh
.nCount
) /* empty region -> use a single all-zero rectangle */
1271 ret
= redraw_window_rects( hwnd
, flags
, &empty
, 1 );
1273 ret
= redraw_window_rects( hwnd
, flags
, (const RECT
*)data
->Buffer
, data
->rdh
.nCount
);
1274 HeapFree( GetProcessHeap(), 0, data
);
1277 if (!hwnd
) hwnd
= GetDesktopWindow();
1279 if (flags
& RDW_UPDATENOW
) update_now( hwnd
, flags
);
1280 else if (flags
& RDW_ERASENOW
) erase_now( hwnd
, flags
);
1286 /***********************************************************************
1287 * UpdateWindow (USER32.@)
1289 BOOL WINAPI
UpdateWindow( HWND hwnd
)
1293 SetLastError( ERROR_INVALID_WINDOW_HANDLE
);
1297 return RedrawWindow( hwnd
, NULL
, 0, RDW_UPDATENOW
| RDW_ALLCHILDREN
);
1301 /***********************************************************************
1302 * InvalidateRgn (USER32.@)
1304 BOOL WINAPI
InvalidateRgn( HWND hwnd
, HRGN hrgn
, BOOL erase
)
1308 SetLastError( ERROR_INVALID_WINDOW_HANDLE
);
1312 return RedrawWindow(hwnd
, NULL
, hrgn
, RDW_INVALIDATE
| (erase
? RDW_ERASE
: 0) );
1316 /***********************************************************************
1317 * InvalidateRect (USER32.@)
1319 * MSDN: if hwnd parameter is NULL, InvalidateRect invalidates and redraws
1320 * all windows and sends WM_ERASEBKGND and WM_NCPAINT.
1322 BOOL WINAPI
InvalidateRect( HWND hwnd
, const RECT
*rect
, BOOL erase
)
1324 UINT flags
= RDW_INVALIDATE
| (erase
? RDW_ERASE
: 0);
1328 flags
= RDW_ALLCHILDREN
| RDW_INVALIDATE
| RDW_FRAME
| RDW_ERASE
| RDW_ERASENOW
;
1332 return RedrawWindow( hwnd
, rect
, 0, flags
);
1336 /***********************************************************************
1337 * ValidateRgn (USER32.@)
1339 BOOL WINAPI
ValidateRgn( HWND hwnd
, HRGN hrgn
)
1343 SetLastError( ERROR_INVALID_WINDOW_HANDLE
);
1347 return RedrawWindow( hwnd
, NULL
, hrgn
, RDW_VALIDATE
);
1351 /***********************************************************************
1352 * ValidateRect (USER32.@)
1354 * MSDN: if hwnd parameter is NULL, ValidateRect invalidates and redraws
1355 * all windows and sends WM_ERASEBKGND and WM_NCPAINT.
1357 BOOL WINAPI
ValidateRect( HWND hwnd
, const RECT
*rect
)
1359 UINT flags
= RDW_VALIDATE
;
1363 flags
= RDW_ALLCHILDREN
| RDW_INVALIDATE
| RDW_FRAME
| RDW_ERASE
| RDW_ERASENOW
;
1367 return RedrawWindow( hwnd
, rect
, 0, flags
);
1371 /***********************************************************************
1372 * GetUpdateRgn (USER32.@)
1374 INT WINAPI
GetUpdateRgn( HWND hwnd
, HRGN hrgn
, BOOL erase
)
1376 DPI_AWARENESS_CONTEXT context
;
1378 UINT flags
= UPDATE_NOCHILDREN
;
1381 context
= SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( hwnd
));
1383 if (erase
) flags
|= UPDATE_NONCLIENT
| UPDATE_ERASE
;
1385 if ((update_rgn
= send_ncpaint( hwnd
, NULL
, &flags
)))
1387 retval
= CombineRgn( hrgn
, update_rgn
, 0, RGN_COPY
);
1388 if (send_erase( hwnd
, flags
, update_rgn
, NULL
, NULL
))
1390 flags
= UPDATE_DELAYED_ERASE
;
1391 get_update_flags( hwnd
, NULL
, &flags
);
1393 /* map region to client coordinates */
1394 map_window_region( 0, hwnd
, hrgn
);
1396 SetThreadDpiAwarenessContext( context
);
1401 /***********************************************************************
1402 * GetUpdateRect (USER32.@)
1404 BOOL WINAPI
GetUpdateRect( HWND hwnd
, LPRECT rect
, BOOL erase
)
1406 DPI_AWARENESS_CONTEXT context
;
1407 UINT flags
= UPDATE_NOCHILDREN
;
1411 if (erase
) flags
|= UPDATE_NONCLIENT
| UPDATE_ERASE
;
1413 if (!(update_rgn
= send_ncpaint( hwnd
, NULL
, &flags
))) return FALSE
;
1417 if (GetRgnBox( update_rgn
, rect
) != NULLREGION
)
1419 HDC hdc
= GetDCEx( hwnd
, 0, DCX_USESTYLE
);
1420 DWORD layout
= SetLayout( hdc
, 0 ); /* MapWindowPoints mirrors already */
1421 context
= SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( hwnd
));
1422 MapWindowPoints( 0, hwnd
, (LPPOINT
)rect
, 2 );
1423 SetThreadDpiAwarenessContext( context
);
1424 *rect
= rect_win_to_thread_dpi( hwnd
, *rect
);
1425 DPtoLP( hdc
, (LPPOINT
)rect
, 2 );
1426 SetLayout( hdc
, layout
);
1427 ReleaseDC( hwnd
, hdc
);
1430 need_erase
= send_erase( hwnd
, flags
, update_rgn
, NULL
, NULL
);
1432 /* check if we still have an update region */
1433 flags
= UPDATE_PAINT
| UPDATE_NOCHILDREN
;
1434 if (need_erase
) flags
|= UPDATE_DELAYED_ERASE
;
1435 return (get_update_flags( hwnd
, NULL
, &flags
) && (flags
& UPDATE_PAINT
));
1439 /***********************************************************************
1440 * ExcludeUpdateRgn (USER32.@)
1442 INT WINAPI
ExcludeUpdateRgn( HDC hdc
, HWND hwnd
)
1444 HRGN update_rgn
= CreateRectRgn( 0, 0, 0, 0 );
1445 INT ret
= GetUpdateRgn( hwnd
, update_rgn
, FALSE
);
1449 DPI_AWARENESS_CONTEXT context
;
1452 context
= SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( hwnd
));
1453 GetDCOrgEx( hdc
, &pt
);
1454 MapWindowPoints( 0, hwnd
, &pt
, 1 );
1455 OffsetRgn( update_rgn
, -pt
.x
, -pt
.y
);
1456 ret
= ExtSelectClipRgn( hdc
, update_rgn
, RGN_DIFF
);
1457 SetThreadDpiAwarenessContext( context
);
1459 DeleteObject( update_rgn
);
1464 static INT
scroll_window( HWND hwnd
, INT dx
, INT dy
, const RECT
*rect
, const RECT
*clipRect
,
1465 HRGN hrgnUpdate
, LPRECT rcUpdate
, UINT flags
, BOOL is_ex
)
1467 INT retVal
= NULLREGION
;
1468 BOOL bOwnRgn
= TRUE
;
1469 BOOL bUpdate
= (rcUpdate
|| hrgnUpdate
|| flags
& (SW_INVALIDATE
| SW_ERASE
));
1472 HRGN hrgnWinupd
= 0;
1475 HWND hwndCaret
= NULL
;
1476 BOOL moveCaret
= FALSE
;
1479 TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n",
1480 hwnd
, dx
, dy
, hrgnUpdate
, rcUpdate
, wine_dbgstr_rect(rect
), flags
);
1481 TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect
));
1482 if( flags
& ~( SW_SCROLLCHILDREN
| SW_INVALIDATE
| SW_ERASE
))
1483 FIXME("some flags (%04x) are unhandled\n", flags
);
1485 rdw_flags
= (flags
& SW_ERASE
) && (flags
& SW_INVALIDATE
) ?
1486 RDW_INVALIDATE
| RDW_ERASE
: RDW_INVALIDATE
;
1488 if (!WIN_IsWindowDrawable( hwnd
, TRUE
)) return ERROR
;
1489 hwnd
= WIN_GetFullHandle( hwnd
);
1491 GetClientRect(hwnd
, &rc
);
1493 if (clipRect
) IntersectRect(&cliprc
,&rc
,clipRect
);
1496 if (rect
) IntersectRect(&rc
, &rc
, rect
);
1498 if( hrgnUpdate
) bOwnRgn
= FALSE
;
1499 else if( bUpdate
) hrgnUpdate
= CreateRectRgn( 0, 0, 0, 0 );
1501 newCaretPos
.x
= newCaretPos
.y
= 0;
1503 if( !IsRectEmpty(&cliprc
) && (dx
|| dy
)) {
1505 DWORD style
= GetWindowLongW( hwnd
, GWL_STYLE
);
1507 hwndCaret
= fix_caret(hwnd
, &rc
, dx
, dy
, flags
, &moveCaret
, &newCaretPos
);
1509 HideCaret(hwndCaret
);
1511 if (is_ex
) dcxflags
|= DCX_CACHE
;
1512 if( style
& WS_CLIPSIBLINGS
) dcxflags
|= DCX_CLIPSIBLINGS
;
1513 if( GetClassLongW( hwnd
, GCL_STYLE
) & CS_PARENTDC
)
1514 dcxflags
|= DCX_PARENTCLIP
;
1515 if( !(flags
& SW_SCROLLCHILDREN
) && (style
& WS_CLIPCHILDREN
))
1516 dcxflags
|= DCX_CLIPCHILDREN
;
1517 hDC
= GetDCEx( hwnd
, 0, dcxflags
);
1520 NtUserScrollDC( hDC
, dx
, dy
, &rc
, &cliprc
, hrgnUpdate
, rcUpdate
);
1522 ReleaseDC( hwnd
, hDC
);
1525 RedrawWindow( hwnd
, NULL
, hrgnUpdate
, rdw_flags
);
1528 /* If the windows has an update region, this must be
1529 * scrolled as well. Keep a copy in hrgnWinupd
1530 * to be added to hrngUpdate at the end. */
1531 hrgnTemp
= CreateRectRgn( 0, 0, 0, 0 );
1532 retVal
= GetUpdateRgn( hwnd
, hrgnTemp
, FALSE
);
1533 if (retVal
!= NULLREGION
)
1535 HRGN hrgnClip
= CreateRectRgnIndirect(&cliprc
);
1537 hrgnWinupd
= CreateRectRgn( 0, 0, 0, 0);
1538 CombineRgn( hrgnWinupd
, hrgnTemp
, 0, RGN_COPY
);
1540 OffsetRgn( hrgnTemp
, dx
, dy
);
1541 CombineRgn( hrgnTemp
, hrgnTemp
, hrgnClip
, RGN_AND
);
1543 CombineRgn( hrgnWinupd
, hrgnWinupd
, hrgnTemp
, RGN_OR
);
1544 RedrawWindow( hwnd
, NULL
, hrgnTemp
, rdw_flags
);
1546 /* Catch the case where the scrolling amount exceeds the size of the
1547 * original window. This generated a second update area that is the
1548 * location where the original scrolled content would end up.
1549 * This second region is not returned by the ScrollDC and sets
1550 * ScrollWindowEx apart from just a ScrollDC.
1552 * This has been verified with testing on windows.
1554 if (abs(dx
) > abs(rc
.right
- rc
.left
) ||
1555 abs(dy
) > abs(rc
.bottom
- rc
.top
))
1557 SetRectRgn( hrgnTemp
, rc
.left
+ dx
, rc
.top
+ dy
, rc
.right
+dx
, rc
.bottom
+ dy
);
1558 CombineRgn( hrgnTemp
, hrgnTemp
, hrgnClip
, RGN_AND
);
1559 CombineRgn( hrgnUpdate
, hrgnUpdate
, hrgnTemp
, RGN_OR
);
1564 GetRgnBox( hrgnTemp
, &rcTemp
);
1565 UnionRect( rcUpdate
, rcUpdate
, &rcTemp
);
1569 CombineRgn( hrgnWinupd
, hrgnWinupd
, hrgnTemp
, RGN_OR
);
1571 DeleteObject( hrgnClip
);
1573 DeleteObject( hrgnTemp
);
1575 /* nothing was scrolled */
1577 SetRectRgn( hrgnUpdate
, 0, 0, 0, 0 );
1578 SetRectEmpty( rcUpdate
);
1581 if( flags
& SW_SCROLLCHILDREN
)
1583 HWND
*list
= WIN_ListChildren( hwnd
);
1588 for (i
= 0; list
[i
]; i
++)
1590 WIN_GetRectangles( list
[i
], COORDS_PARENT
, &r
, NULL
);
1591 if (!rect
|| IntersectRect(&dummy
, &r
, rect
))
1592 SetWindowPos( list
[i
], 0, r
.left
+ dx
, r
.top
+ dy
, 0, 0,
1593 SWP_NOZORDER
| SWP_NOSIZE
| SWP_NOACTIVATE
|
1594 SWP_NOREDRAW
| SWP_DEFERERASE
);
1596 HeapFree( GetProcessHeap(), 0, list
);
1600 if( flags
& (SW_INVALIDATE
| SW_ERASE
) )
1601 RedrawWindow( hwnd
, NULL
, hrgnUpdate
, rdw_flags
|
1602 ((flags
& SW_SCROLLCHILDREN
) ? RDW_ALLCHILDREN
: 0 ) );
1605 CombineRgn( hrgnUpdate
, hrgnUpdate
, hrgnWinupd
, RGN_OR
);
1606 DeleteObject( hrgnWinupd
);
1610 SetCaretPos( newCaretPos
.x
, newCaretPos
.y
);
1612 ShowCaret( hwndCaret
);
1614 if( bOwnRgn
&& hrgnUpdate
) DeleteObject( hrgnUpdate
);
1620 /*************************************************************************
1621 * ScrollWindowEx (USER32.@)
1623 * Note: contrary to what the doc says, pixels that are scrolled from the
1624 * outside of clipRect to the inside are NOT painted.
1627 INT WINAPI
ScrollWindowEx( HWND hwnd
, INT dx
, INT dy
,
1628 const RECT
*rect
, const RECT
*clipRect
,
1629 HRGN hrgnUpdate
, LPRECT rcUpdate
,
1632 return scroll_window( hwnd
, dx
, dy
, rect
, clipRect
, hrgnUpdate
, rcUpdate
, flags
, TRUE
);
1635 /*************************************************************************
1636 * ScrollWindow (USER32.@)
1639 BOOL WINAPI
ScrollWindow( HWND hwnd
, INT dx
, INT dy
,
1640 const RECT
*rect
, const RECT
*clipRect
)
1642 return scroll_window( hwnd
, dx
, dy
, rect
, clipRect
, 0, NULL
,
1643 SW_INVALIDATE
| SW_ERASE
| (rect
? 0 : SW_SCROLLCHILDREN
), FALSE
) != ERROR
;
1646 /************************************************************************
1647 * PrintWindow (USER32.@)
1650 BOOL WINAPI
PrintWindow(HWND hwnd
, HDC hdcBlt
, UINT nFlags
)
1652 UINT flags
= PRF_CHILDREN
| PRF_ERASEBKGND
| PRF_OWNED
| PRF_CLIENT
;
1653 if(!(nFlags
& PW_CLIENTONLY
))
1655 flags
|= PRF_NONCLIENT
;
1657 SendMessageW(hwnd
, WM_PRINT
, (WPARAM
)hdcBlt
, flags
);