4 * Copyright 1993 Alexandre Julliard
5 * 1996,1997 Alex Korobka
8 * Note: Visible regions of CS_OWNDC/CS_CLASSDC window DCs
9 * have to be updated dynamically.
13 * DCX_DCEEMPTY - dce is uninitialized
14 * DCX_DCEBUSY - dce is in use
15 * DCX_DCEDIRTY - ReleaseDC() should wipe instead of caching
16 * DCX_KEEPCLIPRGN - ReleaseDC() should not delete the clipping region
17 * DCX_WINDOWPAINT - BeginPaint() is in effect
29 #include "sysmetrics.h"
32 #include "wine/winuser16.h"
34 DEFAULT_DEBUG_CHANNEL(dc
)
36 #define NB_DCE 5 /* Number of DCEs created at startup */
38 static DCE
*firstDCE
= 0;
39 static HDC defaultDCstate
= 0;
41 static void DCE_DeleteClipRgn( DCE
* );
42 static INT
DCE_ReleaseDC( DCE
* );
45 /***********************************************************************
48 static void DCE_DumpCache(void)
58 DUMP("\t[0x%08x] hWnd 0x%04x, dcx %08x, %s %s\n",
59 (unsigned)dce
, dce
->hwndCurrent
, (unsigned)dce
->DCXflags
,
60 (dce
->DCXflags
& DCX_CACHE
) ? "Cache" : "Owned",
61 (dce
->DCXflags
& DCX_DCEBUSY
) ? "InUse" : "" );
68 /***********************************************************************
73 DCE
*DCE_AllocDCE( HWND hWnd
, DCE_TYPE type
)
78 if (!(dce
= HeapAlloc( SystemHeap
, 0, sizeof(DCE
) ))) return NULL
;
79 if (!(dce
->hDC
= CreateDC16( "DISPLAY", NULL
, NULL
, NULL
)))
81 HeapFree( SystemHeap
, 0, dce
);
85 wnd
= WIN_FindWndPtr(hWnd
);
87 /* store DCE handle in DC hook data field */
89 SetDCHook( dce
->hDC
, (FARPROC16
)DCHook16
, (DWORD
)dce
);
91 dce
->hwndCurrent
= hWnd
;
96 if( type
!= DCE_CACHE_DC
) /* owned or class DC */
98 dce
->DCXflags
= DCX_DCEBUSY
;
101 if( wnd
->dwStyle
& WS_CLIPCHILDREN
) dce
->DCXflags
|= DCX_CLIPCHILDREN
;
102 if( wnd
->dwStyle
& WS_CLIPSIBLINGS
) dce
->DCXflags
|= DCX_CLIPSIBLINGS
;
104 SetHookFlags16(dce
->hDC
,DCHF_INVALIDATEVISRGN
);
106 else dce
->DCXflags
= DCX_CACHE
| DCX_DCEEMPTY
;
108 WIN_ReleaseWndPtr(wnd
);
114 /***********************************************************************
117 DCE
* DCE_FreeDCE( DCE
*dce
)
121 if (!dce
) return NULL
;
127 while (*ppDCE
&& (*ppDCE
!= dce
)) ppDCE
= &(*ppDCE
)->next
;
128 if (*ppDCE
== dce
) *ppDCE
= dce
->next
;
130 SetDCHook(dce
->hDC
, NULL
, 0L);
132 DeleteDC( dce
->hDC
);
133 if( dce
->hClipRgn
&& !(dce
->DCXflags
& DCX_KEEPCLIPRGN
) )
134 DeleteObject(dce
->hClipRgn
);
135 HeapFree( SystemHeap
, 0, dce
);
142 /***********************************************************************
145 * Remove owned DCE and reset unreleased cache DCEs.
147 void DCE_FreeWindowDCE( WND
* pWnd
)
156 if( pDCE
->hwndCurrent
== pWnd
->hwndSelf
)
158 if( pDCE
== pWnd
->dce
) /* owned DCE */
160 pDCE
= DCE_FreeDCE( pDCE
);
166 if(!(pDCE
->DCXflags
& DCX_CACHE
) ) /* class DCE */
168 if( pDCE
->DCXflags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
) )
169 DCE_DeleteClipRgn( pDCE
);
171 else if( pDCE
->DCXflags
& DCX_DCEBUSY
) /* shared cache DCE */
173 ERR(dc
,"[%04x] GetDC() without ReleaseDC()!\n",
175 DCE_ReleaseDC( pDCE
);
178 pDCE
->DCXflags
&= DCX_CACHE
;
179 pDCE
->DCXflags
|= DCX_DCEEMPTY
;
180 pDCE
->hwndCurrent
= 0;
190 /***********************************************************************
193 static void DCE_DeleteClipRgn( DCE
* dce
)
195 dce
->DCXflags
&= ~(DCX_EXCLUDERGN
| DCX_INTERSECTRGN
| DCX_WINDOWPAINT
);
197 if( dce
->DCXflags
& DCX_KEEPCLIPRGN
)
198 dce
->DCXflags
&= ~DCX_KEEPCLIPRGN
;
200 if( dce
->hClipRgn
> 1 )
201 DeleteObject( dce
->hClipRgn
);
205 TRACE(dc
,"\trestoring VisRgn\n");
207 RestoreVisRgn16(dce
->hDC
);
211 /***********************************************************************
214 static INT
DCE_ReleaseDC( DCE
* dce
)
216 if ((dce
->DCXflags
& (DCX_DCEEMPTY
| DCX_DCEBUSY
)) != DCX_DCEBUSY
) return 0;
218 /* restore previous visible region */
220 if ((dce
->DCXflags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
)) &&
221 (dce
->DCXflags
& (DCX_CACHE
| DCX_WINDOWPAINT
)) )
222 DCE_DeleteClipRgn( dce
);
224 if (dce
->DCXflags
& DCX_CACHE
)
226 SetDCState16( dce
->hDC
, defaultDCstate
);
227 dce
->DCXflags
&= ~DCX_DCEBUSY
;
228 if (dce
->DCXflags
& DCX_DCEDIRTY
)
230 /* don't keep around invalidated entries
231 * because SetDCState() disables hVisRgn updates
232 * by removing dirty bit. */
234 dce
->hwndCurrent
= 0;
235 dce
->DCXflags
&= DCX_CACHE
;
236 dce
->DCXflags
|= DCX_DCEEMPTY
;
243 /***********************************************************************
246 * It is called from SetWindowPos() - we have to mark as dirty all busy
247 * DCEs for windows that have pWnd->parent as an ansector and whose client
248 * rect intersects with specified update rectangle. In addition, pWnd->parent
249 * DCEs may need to be updated if DCX_CLIPCHILDREN flag is set.
251 BOOL
DCE_InvalidateDCE(WND
* pWnd
, const RECT
* pRectUpdate
)
253 WND
* wndScope
= WIN_LockWndPtr(pWnd
->parent
);
254 WND
*pDesktop
= WIN_GetDesktop();
261 TRACE(dc
,"scope hwnd = %04x, (%i,%i - %i,%i)\n",
262 wndScope
->hwndSelf
, pRectUpdate
->left
,pRectUpdate
->top
,
263 pRectUpdate
->right
,pRectUpdate
->bottom
);
267 /* walk all DCEs and fixup non-empty entries */
269 for (dce
= firstDCE
; (dce
); dce
= dce
->next
)
271 if( !(dce
->DCXflags
& DCX_DCEEMPTY
) )
273 WND
* wndCurrent
= WIN_FindWndPtr(dce
->hwndCurrent
);
278 INT xoffset
= 0, yoffset
= 0;
280 if( (wndCurrent
== wndScope
) && !(dce
->DCXflags
& DCX_CLIPCHILDREN
) )
282 /* child window positions don't bother us */
283 WIN_ReleaseWndPtr(wndCurrent
);
287 if( !Options
.desktopGeometry
&& wndCurrent
== pDesktop
)
289 /* don't bother with fake desktop */
290 WIN_ReleaseWndPtr(wndCurrent
);
294 /* check if DCE window is within the z-order scope */
296 for( wnd
= WIN_LockWndPtr(wndCurrent
); wnd
; WIN_UpdateWndPtr(&wnd
,wnd
->parent
))
298 if( wnd
== wndScope
)
302 wndRect
= wndCurrent
->rectWindow
;
304 OffsetRect( &wndRect
, xoffset
- wndCurrent
->rectClient
.left
,
305 yoffset
- wndCurrent
->rectClient
.top
);
307 if (pWnd
== wndCurrent
||
308 IntersectRect( &wndRect
, &wndRect
, pRectUpdate
))
310 if( !(dce
->DCXflags
& DCX_DCEBUSY
) )
312 /* Don't bother with visible regions of unused DCEs */
314 TRACE(dc
,"\tpurged %08x dce [%04x]\n",
315 (unsigned)dce
, wndCurrent
->hwndSelf
);
317 dce
->hwndCurrent
= 0;
318 dce
->DCXflags
&= DCX_CACHE
;
319 dce
->DCXflags
|= DCX_DCEEMPTY
;
323 /* Set dirty bits in the hDC and DCE structs */
325 TRACE(dc
,"\tfixed up %08x dce [%04x]\n",
326 (unsigned)dce
, wndCurrent
->hwndSelf
);
328 dce
->DCXflags
|= DCX_DCEDIRTY
;
329 SetHookFlags16(dce
->hDC
, DCHF_INVALIDATEVISRGN
);
333 WIN_ReleaseWndPtr(wnd
);
336 xoffset
+= wnd
->rectClient
.left
;
337 yoffset
+= wnd
->rectClient
.top
;
340 WIN_ReleaseWndPtr(wndCurrent
);
343 WIN_ReleaseWndPtr(wndScope
);
345 WIN_ReleaseDesktop();
349 /***********************************************************************
357 for (i
= 0; i
< NB_DCE
; i
++)
359 if (!(dce
= DCE_AllocDCE( 0, DCE_CACHE_DC
))) return;
360 if (!defaultDCstate
) defaultDCstate
= GetDCState16( dce
->hDC
);
365 /***********************************************************************
368 * Calculate the visible rectangle of a window (i.e. the client or
369 * window area clipped by the client area of all ancestors) in the
370 * corresponding coordinates. Return FALSE if the visible region is empty.
372 static BOOL
DCE_GetVisRect( WND
*wndPtr
, BOOL clientArea
, RECT
*lprect
)
374 *lprect
= clientArea
? wndPtr
->rectClient
: wndPtr
->rectWindow
;
376 if (wndPtr
->dwStyle
& WS_VISIBLE
)
378 INT xoffset
= lprect
->left
;
379 INT yoffset
= lprect
->top
;
381 while( !(wndPtr
->flags
& WIN_NATIVE
) )
383 wndPtr
= WIN_LockWndPtr(wndPtr
->parent
);
385 if ( (wndPtr
->dwStyle
& (WS_ICONIC
| WS_VISIBLE
)) != WS_VISIBLE
)
387 WIN_ReleaseWndPtr(wndPtr
);
391 xoffset
+= wndPtr
->rectClient
.left
;
392 yoffset
+= wndPtr
->rectClient
.top
;
393 OffsetRect( lprect
, wndPtr
->rectClient
.left
,
394 wndPtr
->rectClient
.top
);
396 if( (wndPtr
->rectClient
.left
>= wndPtr
->rectClient
.right
) ||
397 (wndPtr
->rectClient
.top
>= wndPtr
->rectClient
.bottom
) ||
398 (lprect
->left
>= wndPtr
->rectClient
.right
) ||
399 (lprect
->right
<= wndPtr
->rectClient
.left
) ||
400 (lprect
->top
>= wndPtr
->rectClient
.bottom
) ||
401 (lprect
->bottom
<= wndPtr
->rectClient
.top
) )
403 WIN_ReleaseWndPtr(wndPtr
);
407 lprect
->left
= MAX( lprect
->left
, wndPtr
->rectClient
.left
);
408 lprect
->right
= MIN( lprect
->right
, wndPtr
->rectClient
.right
);
409 lprect
->top
= MAX( lprect
->top
, wndPtr
->rectClient
.top
);
410 lprect
->bottom
= MIN( lprect
->bottom
, wndPtr
->rectClient
.bottom
);
412 WIN_ReleaseWndPtr(wndPtr
);
414 OffsetRect( lprect
, -xoffset
, -yoffset
);
419 SetRectEmpty( lprect
);
424 /***********************************************************************
427 * Go through the linked list of windows from pWndStart to pWndEnd,
428 * adding to the clip region the intersection of the target rectangle
429 * with an offset window rectangle.
431 static BOOL
DCE_AddClipRects( WND
*pWndStart
, WND
*pWndEnd
,
432 HRGN hrgnClip
, LPRECT lpRect
, int x
, int y
)
436 if( pWndStart
->pDriver
->pIsSelfClipping( pWndStart
) )
437 return TRUE
; /* The driver itself will do the clipping */
439 for (WIN_LockWndPtr(pWndStart
); pWndStart
!= pWndEnd
; WIN_UpdateWndPtr(&pWndStart
,pWndStart
->next
))
441 if( !(pWndStart
->dwStyle
& WS_VISIBLE
) ) continue;
443 rect
.left
= pWndStart
->rectWindow
.left
+ x
;
444 rect
.top
= pWndStart
->rectWindow
.top
+ y
;
445 rect
.right
= pWndStart
->rectWindow
.right
+ x
;
446 rect
.bottom
= pWndStart
->rectWindow
.bottom
+ y
;
448 if( IntersectRect( &rect
, &rect
, lpRect
))
450 if(!REGION_UnionRectWithRgn( hrgnClip
, &rect
)) break;
453 WIN_ReleaseWndPtr(pWndStart
);
454 return (pWndStart
== pWndEnd
);
458 /***********************************************************************
461 * Return the visible region of a window, i.e. the client or window area
462 * clipped by the client area of all ancestors, and then optionally
463 * by siblings and children.
465 HRGN
DCE_GetVisRgn( HWND hwnd
, WORD flags
, HWND hwndChild
, WORD cflags
)
469 WND
*wndPtr
= WIN_FindWndPtr( hwnd
);
470 WND
*childWnd
= WIN_FindWndPtr( hwndChild
);
472 /* Get visible rectangle and create a region with it. */
474 if (wndPtr
&& DCE_GetVisRect(wndPtr
, !(flags
& DCX_WINDOW
), &rect
))
476 if((hrgnVis
= CreateRectRgnIndirect( &rect
)))
478 HRGN hrgnClip
= CreateRectRgn( 0, 0, 0, 0 );
479 INT xoffset
, yoffset
;
483 /* Compute obscured region for the visible rectangle by
484 * clipping children, siblings, and ancestors. Note that
485 * DCE_GetVisRect() returns a rectangle either in client
486 * or in window coordinates (for DCX_WINDOW request). */
488 if( (flags
& DCX_CLIPCHILDREN
) && wndPtr
->child
)
490 if( flags
& DCX_WINDOW
)
492 /* adjust offsets since child window rectangles are
493 * in client coordinates */
495 xoffset
= wndPtr
->rectClient
.left
- wndPtr
->rectWindow
.left
;
496 yoffset
= wndPtr
->rectClient
.top
- wndPtr
->rectWindow
.top
;
499 xoffset
= yoffset
= 0;
501 DCE_AddClipRects( wndPtr
->child
, NULL
, hrgnClip
,
502 &rect
, xoffset
, yoffset
);
505 /* We may need to clip children of child window, if a window with PARENTDC
506 * class style and CLIPCHILDREN window style (like in Free Agent 16
507 * preference dialogs) gets here, we take the region for the parent window
508 * but apparently still need to clip the children of the child window... */
510 if( (cflags
& DCX_CLIPCHILDREN
) && childWnd
&& childWnd
->child
)
512 if( flags
& DCX_WINDOW
)
514 /* adjust offsets since child window rectangles are
515 * in client coordinates */
517 xoffset
= wndPtr
->rectClient
.left
- wndPtr
->rectWindow
.left
;
518 yoffset
= wndPtr
->rectClient
.top
- wndPtr
->rectWindow
.top
;
521 xoffset
= yoffset
= 0;
523 /* client coordinates of child window */
524 xoffset
+= childWnd
->rectClient
.left
;
525 yoffset
+= childWnd
->rectClient
.top
;
527 DCE_AddClipRects( childWnd
->child
, NULL
, hrgnClip
,
528 &rect
, xoffset
, yoffset
);
531 /* sibling window rectangles are in client
532 * coordinates of the parent window */
534 if (flags
& DCX_WINDOW
)
536 xoffset
= -wndPtr
->rectWindow
.left
;
537 yoffset
= -wndPtr
->rectWindow
.top
;
541 xoffset
= -wndPtr
->rectClient
.left
;
542 yoffset
= -wndPtr
->rectClient
.top
;
545 if (flags
& DCX_CLIPSIBLINGS
&& wndPtr
->parent
)
546 DCE_AddClipRects( wndPtr
->parent
->child
,
547 wndPtr
, hrgnClip
, &rect
, xoffset
, yoffset
);
549 /* Clip siblings of all ancestors that have the
550 * WS_CLIPSIBLINGS style
553 while (wndPtr
->dwStyle
& WS_CHILD
)
555 WIN_UpdateWndPtr(&wndPtr
,wndPtr
->parent
);
556 xoffset
-= wndPtr
->rectClient
.left
;
557 yoffset
-= wndPtr
->rectClient
.top
;
558 if(wndPtr
->dwStyle
& WS_CLIPSIBLINGS
&& wndPtr
->parent
)
560 DCE_AddClipRects( wndPtr
->parent
->child
, wndPtr
,
561 hrgnClip
, &rect
, xoffset
, yoffset
);
565 /* Now once we've got a jumbo clip region we have
566 * to substract it from the visible rectangle.
569 CombineRgn( hrgnVis
, hrgnVis
, hrgnClip
, RGN_DIFF
);
570 DeleteObject( hrgnClip
);
574 DeleteObject( hrgnVis
);
580 hrgnVis
= CreateRectRgn(0, 0, 0, 0); /* empty */
581 WIN_ReleaseWndPtr(wndPtr
);
582 WIN_ReleaseWndPtr(childWnd
);
586 /***********************************************************************
589 * Change region from DC-origin relative coordinates to screen coords.
592 static void DCE_OffsetVisRgn( HDC hDC
, HRGN hVisRgn
)
595 if (!(dc
= (DC
*) GDI_GetObjPtr( hDC
, DC_MAGIC
))) return;
597 OffsetRgn( hVisRgn
, dc
->w
.DCOrgX
, dc
->w
.DCOrgY
);
599 GDI_HEAP_UNLOCK( hDC
);
602 /***********************************************************************
605 * Translate given region from the wnd client to the DC coordinates
606 * and add it to the clipping region.
608 INT16
DCE_ExcludeRgn( HDC hDC
, WND
* wnd
, HRGN hRgn
)
613 while (dce
&& (dce
->hDC
!= hDC
)) dce
= dce
->next
;
616 MapWindowPoints( wnd
->hwndSelf
, dce
->hwndCurrent
, &pt
, 1);
617 if( dce
->DCXflags
& DCX_WINDOW
)
619 wnd
= WIN_FindWndPtr(dce
->hwndCurrent
);
620 pt
.x
+= wnd
->rectClient
.left
- wnd
->rectWindow
.left
;
621 pt
.y
+= wnd
->rectClient
.top
- wnd
->rectWindow
.top
;
622 WIN_ReleaseWndPtr(wnd
);
626 OffsetRgn(hRgn
, pt
.x
, pt
.y
);
628 return ExtSelectClipRgn( hDC
, hRgn
, RGN_DIFF
);
632 /***********************************************************************
633 * GetDCEx16 (USER.359)
635 HDC16 WINAPI
GetDCEx16( HWND16 hwnd
, HRGN16 hrgnClip
, DWORD flags
)
637 return (HDC16
)GetDCEx( hwnd
, hrgnClip
, flags
);
641 /***********************************************************************
642 * GetDCEx32 (USER32.231)
644 * Unimplemented flags: DCX_LOCKWINDOWUPDATE
646 * FIXME: Full support for hrgnClip == 1 (alias for entire window).
648 HDC WINAPI
GetDCEx( HWND hwnd
, HRGN hrgnClip
, DWORD flags
)
650 HRGN hrgnVisible
= 0;
656 BOOL bUpdateVisRgn
= TRUE
;
657 BOOL bUpdateClipOrigin
= FALSE
;
659 TRACE(dc
,"hwnd %04x, hrgnClip %04x, flags %08x\n",
660 hwnd
, hrgnClip
, (unsigned)flags
);
662 if (!(wndPtr
= WIN_FindWndPtr( hwnd
))) return 0;
666 if (!(wndPtr
->class->style
& (CS_OWNDC
| CS_CLASSDC
))) flags
|= DCX_CACHE
;
668 if (flags
& DCX_USESTYLE
)
670 flags
&= ~( DCX_CLIPCHILDREN
| DCX_CLIPSIBLINGS
| DCX_PARENTCLIP
);
672 if( wndPtr
->dwStyle
& WS_CLIPSIBLINGS
)
673 flags
|= DCX_CLIPSIBLINGS
;
675 if ( !(flags
& DCX_WINDOW
) )
677 if (wndPtr
->class->style
& CS_PARENTDC
) flags
|= DCX_PARENTCLIP
;
679 if (wndPtr
->dwStyle
& WS_CLIPCHILDREN
&&
680 !(wndPtr
->dwStyle
& WS_MINIMIZE
) ) flags
|= DCX_CLIPCHILDREN
;
682 else flags
|= DCX_CACHE
;
685 if( flags
& DCX_NOCLIPCHILDREN
)
688 flags
&= ~(DCX_PARENTCLIP
| DCX_CLIPCHILDREN
);
691 if (flags
& DCX_WINDOW
)
692 flags
= (flags
& ~DCX_CLIPCHILDREN
) | DCX_CACHE
;
694 if (!(wndPtr
->dwStyle
& WS_CHILD
) || !wndPtr
->parent
)
695 flags
&= ~DCX_PARENTCLIP
;
696 else if( flags
& DCX_PARENTCLIP
)
699 if( !(flags
& (DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
)) )
700 if( (wndPtr
->dwStyle
& WS_VISIBLE
) && (wndPtr
->parent
->dwStyle
& WS_VISIBLE
) )
702 flags
&= ~DCX_CLIPCHILDREN
;
703 if( wndPtr
->parent
->dwStyle
& WS_CLIPSIBLINGS
)
704 flags
|= DCX_CLIPSIBLINGS
;
708 /* find a suitable DCE */
710 dcxFlags
= flags
& (DCX_PARENTCLIP
| DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
|
711 DCX_CACHE
| DCX_WINDOW
);
713 if (flags
& DCX_CACHE
)
718 dceEmpty
= dceUnused
= NULL
;
720 /* Strategy: First, we attempt to find a non-empty but unused DCE with
721 * compatible flags. Next, we look for an empty entry. If the cache is
722 * full we have to purge one of the unused entries.
725 for (dce
= firstDCE
; (dce
); dce
= dce
->next
)
727 if ((dce
->DCXflags
& (DCX_CACHE
| DCX_DCEBUSY
)) == DCX_CACHE
)
731 if (dce
->DCXflags
& DCX_DCEEMPTY
)
734 if ((dce
->hwndCurrent
== hwnd
) &&
735 ((dce
->DCXflags
& (DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
|
736 DCX_CACHE
| DCX_WINDOW
| DCX_PARENTCLIP
)) == dcxFlags
))
738 TRACE(dc
,"\tfound valid %08x dce [%04x], flags %08x\n",
739 (unsigned)dce
, hwnd
, (unsigned)dcxFlags
);
740 bUpdateVisRgn
= FALSE
;
741 bUpdateClipOrigin
= TRUE
;
747 if (!dce
) dce
= (dceEmpty
) ? dceEmpty
: dceUnused
;
749 /* if there's no dce empty or unused, allocate a new one */
752 dce
= DCE_AllocDCE( 0, DCE_CACHE_DC
);
757 dce
= (wndPtr
->class->style
& CS_OWNDC
) ? wndPtr
->dce
: wndPtr
->class->dce
;
758 if( dce
->hwndCurrent
== hwnd
)
760 TRACE(dc
,"\tskipping hVisRgn update\n");
761 bUpdateVisRgn
= FALSE
; /* updated automatically, via DCHook() */
763 if( (dce
->DCXflags
& (DCX_EXCLUDERGN
| DCX_INTERSECTRGN
)) &&
764 (flags
& (DCX_EXCLUDERGN
| DCX_INTERSECTRGN
)) )
766 /* This is likely to be a nested BeginPaint(). */
768 if( dce
->hClipRgn
!= hrgnClip
)
770 FIXME(dc
,"new hrgnClip[%04x] smashes the previous[%04x]\n",
771 hrgnClip
, dce
->hClipRgn
);
772 DCE_DeleteClipRgn( dce
);
775 RestoreVisRgn16(dce
->hDC
);
785 dce
->hwndCurrent
= hwnd
;
787 dce
->DCXflags
= dcxFlags
| (flags
& DCX_WINDOWPAINT
) | DCX_DCEBUSY
;
790 if (!(dc
= (DC
*) GDI_GetObjPtr( hdc
, DC_MAGIC
)))
795 bUpdateVisRgn
= bUpdateVisRgn
|| (dc
->w
.flags
& DC_DIRTY
);
797 /* recompute visible region */
799 wndPtr
->pDriver
->pSetDrawable( wndPtr
, dc
, flags
, bUpdateClipOrigin
);
802 TRACE(dc
,"updating visrgn for %08x dce, hwnd [%04x]\n", (unsigned)dce
, hwnd
);
804 if (flags
& DCX_PARENTCLIP
)
806 WND
*parentPtr
= WIN_LockWndPtr(wndPtr
->parent
);
808 if( wndPtr
->dwStyle
& WS_VISIBLE
&& !(parentPtr
->dwStyle
& WS_MINIMIZE
) )
810 if( parentPtr
->dwStyle
& WS_CLIPSIBLINGS
)
811 dcxFlags
= DCX_CLIPSIBLINGS
| (flags
& ~(DCX_CLIPCHILDREN
| DCX_WINDOW
));
813 dcxFlags
= flags
& ~(DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
| DCX_WINDOW
);
815 hrgnVisible
= DCE_GetVisRgn( parentPtr
->hwndSelf
, dcxFlags
,
816 wndPtr
->hwndSelf
, flags
);
817 if( flags
& DCX_WINDOW
)
818 OffsetRgn( hrgnVisible
, -wndPtr
->rectWindow
.left
,
819 -wndPtr
->rectWindow
.top
);
821 OffsetRgn( hrgnVisible
, -wndPtr
->rectClient
.left
,
822 -wndPtr
->rectClient
.top
);
823 DCE_OffsetVisRgn( hdc
, hrgnVisible
);
826 hrgnVisible
= CreateRectRgn( 0, 0, 0, 0 );
827 WIN_ReleaseWndPtr(parentPtr
);
830 if ((hwnd
== GetDesktopWindow()) && !DESKTOP_IsSingleWindow())
831 hrgnVisible
= CreateRectRgn( 0, 0, SYSMETRICS_CXSCREEN
, SYSMETRICS_CYSCREEN
);
834 hrgnVisible
= DCE_GetVisRgn( hwnd
, flags
, 0, 0 );
835 DCE_OffsetVisRgn( hdc
, hrgnVisible
);
838 dc
->w
.flags
&= ~DC_DIRTY
;
839 dce
->DCXflags
&= ~DCX_DCEDIRTY
;
840 SelectVisRgn16( hdc
, hrgnVisible
);
843 TRACE(dc
,"no visrgn update %08x dce, hwnd [%04x]\n", (unsigned)dce
, hwnd
);
845 /* apply additional region operation (if any) */
847 if( flags
& (DCX_EXCLUDERGN
| DCX_INTERSECTRGN
) )
849 if( !hrgnVisible
) hrgnVisible
= CreateRectRgn( 0, 0, 0, 0 );
851 dce
->DCXflags
|= flags
& (DCX_KEEPCLIPRGN
| DCX_INTERSECTRGN
| DCX_EXCLUDERGN
);
852 dce
->hClipRgn
= hrgnClip
;
854 TRACE(dc
, "\tsaved VisRgn, clipRgn = %04x\n", hrgnClip
);
857 CombineRgn( hrgnVisible
, hrgnClip
, 0, RGN_COPY
);
858 DCE_OffsetVisRgn( hdc
, hrgnVisible
);
859 CombineRgn( hrgnVisible
, InquireVisRgn16( hdc
), hrgnVisible
,
860 (flags
& DCX_INTERSECTRGN
) ? RGN_AND
: RGN_DIFF
);
861 SelectVisRgn16( hdc
, hrgnVisible
);
864 if( hrgnVisible
) DeleteObject( hrgnVisible
);
866 TRACE(dc
, "(%04x,%04x,0x%lx): returning %04x\n",
867 hwnd
, hrgnClip
, flags
, hdc
);
869 WIN_ReleaseWndPtr(wndPtr
);
874 /***********************************************************************
877 HDC16 WINAPI
GetDC16( HWND16 hwnd
)
879 return (HDC16
)GetDC( hwnd
);
883 /***********************************************************************
884 * GetDC32 (USER32.230)
890 HWND hwnd
/* handle of window */
893 return GetDCEx( GetDesktopWindow(), 0, DCX_CACHE
| DCX_WINDOW
);
894 return GetDCEx( hwnd
, 0, DCX_USESTYLE
);
898 /***********************************************************************
899 * GetWindowDC16 (USER.67)
901 HDC16 WINAPI
GetWindowDC16( HWND16 hwnd
)
903 if (!hwnd
) hwnd
= GetDesktopWindow16();
904 return GetDCEx16( hwnd
, 0, DCX_USESTYLE
| DCX_WINDOW
);
908 /***********************************************************************
909 * GetWindowDC32 (USER32.304)
911 HDC WINAPI
GetWindowDC( HWND hwnd
)
913 if (!hwnd
) hwnd
= GetDesktopWindow();
914 return GetDCEx( hwnd
, 0, DCX_USESTYLE
| DCX_WINDOW
);
918 /***********************************************************************
919 * ReleaseDC16 (USER.68)
921 INT16 WINAPI
ReleaseDC16( HWND16 hwnd
, HDC16 hdc
)
923 return (INT16
)ReleaseDC( hwnd
, hdc
);
927 /***********************************************************************
928 * ReleaseDC32 (USER32.440)
934 INT WINAPI
ReleaseDC(
935 HWND hwnd
/* Handle of window - ignored */,
936 HDC hdc
/* Handle of device context */
944 TRACE(dc
, "%04x %04x\n", hwnd
, hdc
);
946 while (dce
&& (dce
->hDC
!= hdc
)) dce
= dce
->next
;
949 if ( dce
->DCXflags
& DCX_DCEBUSY
)
950 nRet
= DCE_ReleaseDC( dce
);
957 /***********************************************************************
960 * See "Undoc. Windows" for hints (DC, SetDCHook, SetHookFlags)..
962 BOOL16 WINAPI
DCHook16( HDC16 hDC
, WORD code
, DWORD data
, LPARAM lParam
)
966 DCE
*dce
= (DCE
*)data
;
970 TRACE(dc
,"hDC = %04x, %i\n", hDC
, code
);
973 assert(dce
->hDC
== hDC
);
975 /* Grab the windows lock before doing anything else */
980 case DCHC_INVALIDVISRGN
:
982 /* GDI code calls this when it detects that the
983 * DC is dirty (usually after SetHookFlags()). This
984 * means that we have to recompute the visible region.
987 if( dce
->DCXflags
& DCX_DCEBUSY
)
990 /* Update stale DC in DCX */
991 wndPtr
= WIN_FindWndPtr( dce
->hwndCurrent
);
992 dc
= (DC
*) GDI_GetObjPtr( dce
->hDC
, DC_MAGIC
);
994 wndPtr
->pDriver
->pSetDrawable( wndPtr
, dc
,dce
->DCXflags
,TRUE
);
996 SetHookFlags16(hDC
, DCHF_VALIDATEVISRGN
);
997 hVisRgn
= DCE_GetVisRgn(dce
->hwndCurrent
, dce
->DCXflags
, 0, 0);
999 TRACE(dc
,"\tapplying saved clipRgn\n");
1001 /* clip this region with saved clipping region */
1003 if ( (dce
->DCXflags
& DCX_INTERSECTRGN
&& dce
->hClipRgn
!= 1) ||
1004 ( dce
->DCXflags
& DCX_EXCLUDERGN
&& dce
->hClipRgn
) )
1007 if( (!dce
->hClipRgn
&& dce
->DCXflags
& DCX_INTERSECTRGN
) ||
1008 (dce
->hClipRgn
== 1 && dce
->DCXflags
& DCX_EXCLUDERGN
) )
1009 SetRectRgn(hVisRgn
,0,0,0,0);
1011 CombineRgn(hVisRgn
, hVisRgn
, dce
->hClipRgn
,
1012 (dce
->DCXflags
& DCX_EXCLUDERGN
)? RGN_DIFF
:RGN_AND
);
1014 dce
->DCXflags
&= ~DCX_DCEDIRTY
;
1015 DCE_OffsetVisRgn( hDC
, hVisRgn
);
1016 SelectVisRgn16(hDC
, hVisRgn
);
1017 DeleteObject( hVisRgn
);
1018 WIN_ReleaseWndPtr( wndPtr
); /* Release WIN_FindWndPtr lock */
1020 else /* non-fatal but shouldn't happen */
1021 WARN(dc
, "DC is not in use!\n");
1026 * Windows will not let you delete a DC that is busy
1027 * (between GetDC and ReleaseDC)
1030 if ( dce
->DCXflags
& DCX_DCEBUSY
)
1032 WARN(dc
, "Application trying to delete a busy DC\n");
1038 FIXME(dc
,"unknown code\n");
1041 WIN_UnlockWnds(); /* Release the wnd lock */
1046 /**********************************************************************
1047 * WindowFromDC16 (USER.117)
1049 HWND16 WINAPI
WindowFromDC16( HDC16 hDC
)
1051 return (HWND16
)WindowFromDC( hDC
);
1055 /**********************************************************************
1056 * WindowFromDC32 (USER32.581)
1058 HWND WINAPI
WindowFromDC( HDC hDC
)
1066 while (dce
&& (dce
->hDC
!= hDC
)) dce
= dce
->next
;
1068 hwnd
= dce
? dce
->hwndCurrent
: 0;
1075 /***********************************************************************
1076 * LockWindowUpdate16 (USER.294)
1078 BOOL16 WINAPI
LockWindowUpdate16( HWND16 hwnd
)
1080 return LockWindowUpdate( hwnd
);
1084 /***********************************************************************
1085 * LockWindowUpdate32 (USER32.378)
1087 BOOL WINAPI
LockWindowUpdate( HWND hwnd
)
1089 /* FIXME? DCX_LOCKWINDOWUPDATE is unimplemented */