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Sweden-Number/windows/dce.c

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/*
* USER DCE functions
*
* Copyright 1993 Alexandre Julliard
* 1996,1997 Alex Korobka
*
*
* Note: Visible regions of CS_OWNDC/CS_CLASSDC window DCs
* have to be updated dynamically.
*
* Internal DCX flags:
*
* DCX_DCEEMPTY - dce is uninitialized
* DCX_DCEBUSY - dce is in use
* DCX_DCEDIRTY - ReleaseDC() should wipe instead of caching
* DCX_KEEPCLIPRGN - ReleaseDC() should not delete the clipping region
* DCX_WINDOWPAINT - BeginPaint() is in effect
*/
#include <assert.h>
#include "desktop.h"
#include "options.h"
#include "dce.h"
#include "class.h"
#include "win.h"
#include "gdi.h"
#include "region.h"
#include "heap.h"
#include "local.h"
#include "debugtools.h"
#include "wine/winuser16.h"
DEFAULT_DEBUG_CHANNEL(dc)
#define NB_DCE 5 /* Number of DCEs created at startup */
static DCE *firstDCE = 0;
static HDC defaultDCstate = 0;
static void DCE_DeleteClipRgn( DCE* );
static INT DCE_ReleaseDC( DCE* );
/***********************************************************************
* DCE_DumpCache
*/
static void DCE_DumpCache(void)
{
DCE *dce;
WIN_LockWnds();
dce = firstDCE;
DPRINTF("DCE:\n");
while( dce )
{
DPRINTF("\t[0x%08x] hWnd 0x%04x, dcx %08x, %s %s\n",
(unsigned)dce, dce->hwndCurrent, (unsigned)dce->DCXflags,
(dce->DCXflags & DCX_CACHE) ? "Cache" : "Owned",
(dce->DCXflags & DCX_DCEBUSY) ? "InUse" : "" );
dce = dce->next;
}
WIN_UnlockWnds();
}
/***********************************************************************
* DCE_AllocDCE
*
* Allocate a new DCE.
*/
DCE *DCE_AllocDCE( HWND hWnd, DCE_TYPE type )
{
DCE * dce;
WND* wnd;
if (!(dce = HeapAlloc( SystemHeap, 0, sizeof(DCE) ))) return NULL;
if (!(dce->hDC = CreateDC16( "DISPLAY", NULL, NULL, NULL )))
{
HeapFree( SystemHeap, 0, dce );
return 0;
}
wnd = WIN_FindWndPtr(hWnd);
/* store DCE handle in DC hook data field */
SetDCHook( dce->hDC, (FARPROC16)DCHook16, (DWORD)dce );
dce->hwndCurrent = hWnd;
dce->hClipRgn = 0;
dce->next = firstDCE;
firstDCE = dce;
if( type != DCE_CACHE_DC ) /* owned or class DC */
{
dce->DCXflags = DCX_DCEBUSY;
if( hWnd )
{
if( wnd->dwStyle & WS_CLIPCHILDREN ) dce->DCXflags |= DCX_CLIPCHILDREN;
if( wnd->dwStyle & WS_CLIPSIBLINGS ) dce->DCXflags |= DCX_CLIPSIBLINGS;
}
SetHookFlags16(dce->hDC,DCHF_INVALIDATEVISRGN);
}
else dce->DCXflags = DCX_CACHE | DCX_DCEEMPTY;
WIN_ReleaseWndPtr(wnd);
return dce;
}
/***********************************************************************
* DCE_FreeDCE
*/
DCE* DCE_FreeDCE( DCE *dce )
{
DCE **ppDCE;
if (!dce) return NULL;
WIN_LockWnds();
ppDCE = &firstDCE;
while (*ppDCE && (*ppDCE != dce)) ppDCE = &(*ppDCE)->next;
if (*ppDCE == dce) *ppDCE = dce->next;
SetDCHook(dce->hDC, NULL, 0L);
DeleteDC( dce->hDC );
if( dce->hClipRgn && !(dce->DCXflags & DCX_KEEPCLIPRGN) )
DeleteObject(dce->hClipRgn);
HeapFree( SystemHeap, 0, dce );
WIN_UnlockWnds();
return *ppDCE;
}
/***********************************************************************
* DCE_FreeWindowDCE
*
* Remove owned DCE and reset unreleased cache DCEs.
*/
void DCE_FreeWindowDCE( WND* pWnd )
{
DCE *pDCE;
WIN_LockWnds();
pDCE = firstDCE;
while( pDCE )
{
if( pDCE->hwndCurrent == pWnd->hwndSelf )
{
if( pDCE == pWnd->dce ) /* owned DCE */
{
pDCE = DCE_FreeDCE( pDCE );
pWnd->dce = NULL;
continue;
}
else
{
if(!(pDCE->DCXflags & DCX_CACHE) ) /* class DCE */
{
if( pDCE->DCXflags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN) )
DCE_DeleteClipRgn( pDCE );
}
else if( pDCE->DCXflags & DCX_DCEBUSY ) /* shared cache DCE */
{
ERR("[%04x] GetDC() without ReleaseDC()!\n",
pWnd->hwndSelf);
DCE_ReleaseDC( pDCE );
}
pDCE->DCXflags &= DCX_CACHE;
pDCE->DCXflags |= DCX_DCEEMPTY;
pDCE->hwndCurrent = 0;
}
}
pDCE = pDCE->next;
}
WIN_UnlockWnds();
}
/***********************************************************************
* DCE_DeleteClipRgn
*/
static void DCE_DeleteClipRgn( DCE* dce )
{
dce->DCXflags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN | DCX_WINDOWPAINT);
if( dce->DCXflags & DCX_KEEPCLIPRGN )
dce->DCXflags &= ~DCX_KEEPCLIPRGN;
else
if( dce->hClipRgn > 1 )
DeleteObject( dce->hClipRgn );
dce->hClipRgn = 0;
TRACE("\trestoring VisRgn\n");
RestoreVisRgn16(dce->hDC);
}
/***********************************************************************
* DCE_ReleaseDC
*/
static INT DCE_ReleaseDC( DCE* dce )
{
if ((dce->DCXflags & (DCX_DCEEMPTY | DCX_DCEBUSY)) != DCX_DCEBUSY) return 0;
/* restore previous visible region */
if ((dce->DCXflags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
(dce->DCXflags & (DCX_CACHE | DCX_WINDOWPAINT)) )
DCE_DeleteClipRgn( dce );
if (dce->DCXflags & DCX_CACHE)
{
SetDCState16( dce->hDC, defaultDCstate );
dce->DCXflags &= ~DCX_DCEBUSY;
if (dce->DCXflags & DCX_DCEDIRTY)
{
/* don't keep around invalidated entries
* because SetDCState() disables hVisRgn updates
* by removing dirty bit. */
dce->hwndCurrent = 0;
dce->DCXflags &= DCX_CACHE;
dce->DCXflags |= DCX_DCEEMPTY;
}
}
return 1;
}
/***********************************************************************
* DCE_InvalidateDCE
*
* It is called from SetWindowPos() - we have to mark as dirty all busy
* DCEs for windows that have pWnd->parent as an ansector and whose client
* rect intersects with specified update rectangle. In addition, pWnd->parent
* DCEs may need to be updated if DCX_CLIPCHILDREN flag is set.
*/
BOOL DCE_InvalidateDCE(WND* pWnd, const RECT* pRectUpdate)
{
WND* wndScope = WIN_LockWndPtr(pWnd->parent);
WND *pDesktop = WIN_GetDesktop();
BOOL bRet = FALSE;
if( wndScope )
{
DCE *dce;
TRACE("scope hwnd = %04x, (%i,%i - %i,%i)\n",
wndScope->hwndSelf, pRectUpdate->left,pRectUpdate->top,
pRectUpdate->right,pRectUpdate->bottom);
if(TRACE_ON(dc))
DCE_DumpCache();
/* walk all DCEs and fixup non-empty entries */
for (dce = firstDCE; (dce); dce = dce->next)
{
if( !(dce->DCXflags & DCX_DCEEMPTY) )
{
WND* wndCurrent = WIN_FindWndPtr(dce->hwndCurrent);
if( wndCurrent )
{
WND* wnd = NULL;
INT xoffset = 0, yoffset = 0;
if( (wndCurrent == wndScope) && !(dce->DCXflags & DCX_CLIPCHILDREN) )
{
/* child window positions don't bother us */
WIN_ReleaseWndPtr(wndCurrent);
continue;
}
if( !Options.desktopGeometry && wndCurrent == pDesktop )
{
/* don't bother with fake desktop */
WIN_ReleaseWndPtr(wndCurrent);
continue;
}
/* check if DCE window is within the z-order scope */
for( wnd = WIN_LockWndPtr(wndCurrent); wnd; WIN_UpdateWndPtr(&wnd,wnd->parent))
{
if( wnd == wndScope )
{
RECT wndRect;
wndRect = wndCurrent->rectWindow;
OffsetRect( &wndRect, xoffset - wndCurrent->rectClient.left,
yoffset - wndCurrent->rectClient.top);
if (pWnd == wndCurrent ||
IntersectRect( &wndRect, &wndRect, pRectUpdate ))
{
if( !(dce->DCXflags & DCX_DCEBUSY) )
{
/* Don't bother with visible regions of unused DCEs */
TRACE("\tpurged %08x dce [%04x]\n",
(unsigned)dce, wndCurrent->hwndSelf);
dce->hwndCurrent = 0;
dce->DCXflags &= DCX_CACHE;
dce->DCXflags |= DCX_DCEEMPTY;
}
else
{
/* Set dirty bits in the hDC and DCE structs */
TRACE("\tfixed up %08x dce [%04x]\n",
(unsigned)dce, wndCurrent->hwndSelf);
dce->DCXflags |= DCX_DCEDIRTY;
SetHookFlags16(dce->hDC, DCHF_INVALIDATEVISRGN);
bRet = TRUE;
}
}
WIN_ReleaseWndPtr(wnd);
break;
}
xoffset += wnd->rectClient.left;
yoffset += wnd->rectClient.top;
}
}
WIN_ReleaseWndPtr(wndCurrent);
}
} /* dce list */
WIN_ReleaseWndPtr(wndScope);
}
WIN_ReleaseDesktop();
return bRet;
}
/***********************************************************************
* DCE_Init
*/
void DCE_Init(void)
{
int i;
DCE * dce;
for (i = 0; i < NB_DCE; i++)
{
if (!(dce = DCE_AllocDCE( 0, DCE_CACHE_DC ))) return;
if (!defaultDCstate) defaultDCstate = GetDCState16( dce->hDC );
}
}
/***********************************************************************
* DCE_GetVisRect
*
* Calculate the visible rectangle of a window (i.e. the client or
* window area clipped by the client area of all ancestors) in the
* corresponding coordinates. Return FALSE if the visible region is empty.
*/
static BOOL DCE_GetVisRect( WND *wndPtr, BOOL clientArea, RECT *lprect )
{
*lprect = clientArea ? wndPtr->rectClient : wndPtr->rectWindow;
if (wndPtr->dwStyle & WS_VISIBLE)
{
INT xoffset = lprect->left;
INT yoffset = lprect->top;
while( !(wndPtr->flags & WIN_NATIVE) &&
( wndPtr = WIN_LockWndPtr(wndPtr->parent)) )
{
if ( (wndPtr->dwStyle & (WS_ICONIC | WS_VISIBLE)) != WS_VISIBLE )
{
WIN_ReleaseWndPtr(wndPtr);
goto fail;
}
xoffset += wndPtr->rectClient.left;
yoffset += wndPtr->rectClient.top;
OffsetRect( lprect, wndPtr->rectClient.left,
wndPtr->rectClient.top );
if( (wndPtr->rectClient.left >= wndPtr->rectClient.right) ||
(wndPtr->rectClient.top >= wndPtr->rectClient.bottom) ||
(lprect->left >= wndPtr->rectClient.right) ||
(lprect->right <= wndPtr->rectClient.left) ||
(lprect->top >= wndPtr->rectClient.bottom) ||
(lprect->bottom <= wndPtr->rectClient.top) )
{
WIN_ReleaseWndPtr(wndPtr);
goto fail;
}
lprect->left = MAX( lprect->left, wndPtr->rectClient.left );
lprect->right = MIN( lprect->right, wndPtr->rectClient.right );
lprect->top = MAX( lprect->top, wndPtr->rectClient.top );
lprect->bottom = MIN( lprect->bottom, wndPtr->rectClient.bottom );
WIN_ReleaseWndPtr(wndPtr);
}
OffsetRect( lprect, -xoffset, -yoffset );
return TRUE;
}
fail:
SetRectEmpty( lprect );
return FALSE;
}
/***********************************************************************
* DCE_AddClipRects
*
* Go through the linked list of windows from pWndStart to pWndEnd,
* adding to the clip region the intersection of the target rectangle
* with an offset window rectangle.
*/
static BOOL DCE_AddClipRects( WND *pWndStart, WND *pWndEnd,
HRGN hrgnClip, LPRECT lpRect, int x, int y )
{
RECT rect;
if( pWndStart->pDriver->pIsSelfClipping( pWndStart ) )
return TRUE; /* The driver itself will do the clipping */
for (WIN_LockWndPtr(pWndStart); pWndStart != pWndEnd; WIN_UpdateWndPtr(&pWndStart,pWndStart->next))
{
if( !(pWndStart->dwStyle & WS_VISIBLE) ) continue;
rect.left = pWndStart->rectWindow.left + x;
rect.top = pWndStart->rectWindow.top + y;
rect.right = pWndStart->rectWindow.right + x;
rect.bottom = pWndStart->rectWindow.bottom + y;
if( IntersectRect( &rect, &rect, lpRect ))
{
if(!REGION_UnionRectWithRgn( hrgnClip, &rect )) break;
}
}
WIN_ReleaseWndPtr(pWndStart);
return (pWndStart == pWndEnd);
}
/***********************************************************************
* DCE_GetVisRgn
*
* Return the visible region of a window, i.e. the client or window area
* clipped by the client area of all ancestors, and then optionally
* by siblings and children.
*/
HRGN DCE_GetVisRgn( HWND hwnd, WORD flags, HWND hwndChild, WORD cflags )
{
HRGN hrgnVis = 0;
RECT rect;
WND *wndPtr = WIN_FindWndPtr( hwnd );
WND *childWnd = WIN_FindWndPtr( hwndChild );
/* Get visible rectangle and create a region with it. */
if (wndPtr && DCE_GetVisRect(wndPtr, !(flags & DCX_WINDOW), &rect))
{
if((hrgnVis = CreateRectRgnIndirect( &rect )))
{
HRGN hrgnClip = CreateRectRgn( 0, 0, 0, 0 );
INT xoffset, yoffset;
if( hrgnClip )
{
/* Compute obscured region for the visible rectangle by
* clipping children, siblings, and ancestors. Note that
* DCE_GetVisRect() returns a rectangle either in client
* or in window coordinates (for DCX_WINDOW request). */
if( (flags & DCX_CLIPCHILDREN) && wndPtr->child )
{
if( flags & DCX_WINDOW )
{
/* adjust offsets since child window rectangles are
* in client coordinates */
xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
}
else
xoffset = yoffset = 0;
DCE_AddClipRects( wndPtr->child, NULL, hrgnClip,
&rect, xoffset, yoffset );
}
/* We may need to clip children of child window, if a window with PARENTDC
* class style and CLIPCHILDREN window style (like in Free Agent 16
* preference dialogs) gets here, we take the region for the parent window
* but apparently still need to clip the children of the child window... */
if( (cflags & DCX_CLIPCHILDREN) && childWnd && childWnd->child )
{
if( flags & DCX_WINDOW )
{
/* adjust offsets since child window rectangles are
* in client coordinates */
xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
}
else
xoffset = yoffset = 0;
/* client coordinates of child window */
xoffset += childWnd->rectClient.left;
yoffset += childWnd->rectClient.top;
DCE_AddClipRects( childWnd->child, NULL, hrgnClip,
&rect, xoffset, yoffset );
}
/* sibling window rectangles are in client
* coordinates of the parent window */
if (flags & DCX_WINDOW)
{
xoffset = -wndPtr->rectWindow.left;
yoffset = -wndPtr->rectWindow.top;
}
else
{
xoffset = -wndPtr->rectClient.left;
yoffset = -wndPtr->rectClient.top;
}
if (flags & DCX_CLIPSIBLINGS && wndPtr->parent )
DCE_AddClipRects( wndPtr->parent->child,
wndPtr, hrgnClip, &rect, xoffset, yoffset );
/* Clip siblings of all ancestors that have the
* WS_CLIPSIBLINGS style
*/
while (wndPtr->dwStyle & WS_CHILD)
{
WIN_UpdateWndPtr(&wndPtr,wndPtr->parent);
xoffset -= wndPtr->rectClient.left;
yoffset -= wndPtr->rectClient.top;
if(wndPtr->dwStyle & WS_CLIPSIBLINGS && wndPtr->parent)
{
DCE_AddClipRects( wndPtr->parent->child, wndPtr,
hrgnClip, &rect, xoffset, yoffset );
}
}
/* Now once we've got a jumbo clip region we have
* to substract it from the visible rectangle.
*/
CombineRgn( hrgnVis, hrgnVis, hrgnClip, RGN_DIFF );
DeleteObject( hrgnClip );
}
else
{
DeleteObject( hrgnVis );
hrgnVis = 0;
}
}
}
else
hrgnVis = CreateRectRgn(0, 0, 0, 0); /* empty */
WIN_ReleaseWndPtr(wndPtr);
WIN_ReleaseWndPtr(childWnd);
return hrgnVis;
}
/***********************************************************************
* DCE_OffsetVisRgn
*
* Change region from DC-origin relative coordinates to screen coords.
*/
static void DCE_OffsetVisRgn( HDC hDC, HRGN hVisRgn )
{
DC *dc;
if (!(dc = (DC *) GDI_GetObjPtr( hDC, DC_MAGIC ))) return;
OffsetRgn( hVisRgn, dc->w.DCOrgX, dc->w.DCOrgY );
GDI_HEAP_UNLOCK( hDC );
}
/***********************************************************************
* DCE_ExcludeRgn
*
* Translate given region from the wnd client to the DC coordinates
* and add it to the clipping region.
*/
INT16 DCE_ExcludeRgn( HDC hDC, WND* wnd, HRGN hRgn )
{
POINT pt = {0, 0};
DCE *dce = firstDCE;
while (dce && (dce->hDC != hDC)) dce = dce->next;
if( dce )
{
MapWindowPoints( wnd->hwndSelf, dce->hwndCurrent, &pt, 1);
if( dce->DCXflags & DCX_WINDOW )
{
wnd = WIN_FindWndPtr(dce->hwndCurrent);
pt.x += wnd->rectClient.left - wnd->rectWindow.left;
pt.y += wnd->rectClient.top - wnd->rectWindow.top;
WIN_ReleaseWndPtr(wnd);
}
}
else return ERROR;
OffsetRgn(hRgn, pt.x, pt.y);
return ExtSelectClipRgn( hDC, hRgn, RGN_DIFF );
}
/***********************************************************************
* GetDCEx16 (USER.359)
*/
HDC16 WINAPI GetDCEx16( HWND16 hwnd, HRGN16 hrgnClip, DWORD flags )
{
return (HDC16)GetDCEx( hwnd, hrgnClip, flags );
}
/***********************************************************************
* GetDCEx32 (USER32.231)
*
* Unimplemented flags: DCX_LOCKWINDOWUPDATE
*
* FIXME: Full support for hrgnClip == 1 (alias for entire window).
*/
HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags )
{
HRGN hrgnVisible = 0;
HDC hdc = 0;
DCE * dce;
DC * dc;
WND * wndPtr;
DWORD dcxFlags = 0;
BOOL bUpdateVisRgn = TRUE;
BOOL bUpdateClipOrigin = FALSE;
TRACE("hwnd %04x, hrgnClip %04x, flags %08x\n",
hwnd, hrgnClip, (unsigned)flags);
if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
/* fixup flags */
if (!(wndPtr->class->style & (CS_OWNDC | CS_CLASSDC))) flags |= DCX_CACHE;
if (flags & DCX_USESTYLE)
{
flags &= ~( DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
if( wndPtr->dwStyle & WS_CLIPSIBLINGS )
flags |= DCX_CLIPSIBLINGS;
if ( !(flags & DCX_WINDOW) )
{
if (wndPtr->class->style & CS_PARENTDC) flags |= DCX_PARENTCLIP;
if (wndPtr->dwStyle & WS_CLIPCHILDREN &&
!(wndPtr->dwStyle & WS_MINIMIZE) ) flags |= DCX_CLIPCHILDREN;
}
else flags |= DCX_CACHE;
}
if( flags & DCX_NOCLIPCHILDREN )
{
flags |= DCX_CACHE;
flags &= ~(DCX_PARENTCLIP | DCX_CLIPCHILDREN);
}
if (flags & DCX_WINDOW)
flags = (flags & ~DCX_CLIPCHILDREN) | DCX_CACHE;
if (!(wndPtr->dwStyle & WS_CHILD) || !wndPtr->parent )
flags &= ~DCX_PARENTCLIP;
else if( flags & DCX_PARENTCLIP )
{
flags |= DCX_CACHE;
if( !(flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) )
if( (wndPtr->dwStyle & WS_VISIBLE) && (wndPtr->parent->dwStyle & WS_VISIBLE) )
{
flags &= ~DCX_CLIPCHILDREN;
if( wndPtr->parent->dwStyle & WS_CLIPSIBLINGS )
flags |= DCX_CLIPSIBLINGS;
}
}
/* find a suitable DCE */
dcxFlags = flags & (DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
DCX_CACHE | DCX_WINDOW);
if (flags & DCX_CACHE)
{
DCE* dceEmpty;
DCE* dceUnused;
dceEmpty = dceUnused = NULL;
/* Strategy: First, we attempt to find a non-empty but unused DCE with
* compatible flags. Next, we look for an empty entry. If the cache is
* full we have to purge one of the unused entries.
*/
for (dce = firstDCE; (dce); dce = dce->next)
{
if ((dce->DCXflags & (DCX_CACHE | DCX_DCEBUSY)) == DCX_CACHE )
{
dceUnused = dce;
if (dce->DCXflags & DCX_DCEEMPTY)
dceEmpty = dce;
else
if ((dce->hwndCurrent == hwnd) &&
((dce->DCXflags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
DCX_CACHE | DCX_WINDOW | DCX_PARENTCLIP)) == dcxFlags))
{
TRACE("\tfound valid %08x dce [%04x], flags %08x\n",
(unsigned)dce, hwnd, (unsigned)dcxFlags );
bUpdateVisRgn = FALSE;
bUpdateClipOrigin = TRUE;
break;
}
}
}
if (!dce) dce = (dceEmpty) ? dceEmpty : dceUnused;
/* if there's no dce empty or unused, allocate a new one */
if (!dce)
{
dce = DCE_AllocDCE( 0, DCE_CACHE_DC );
}
}
else
{
dce = (wndPtr->class->style & CS_OWNDC) ? wndPtr->dce : wndPtr->class->dce;
if( dce->hwndCurrent == hwnd )
{
TRACE("\tskipping hVisRgn update\n");
bUpdateVisRgn = FALSE; /* updated automatically, via DCHook() */
/* Abey - 16Jul99. to take care of the nested GetDC. first one
with DCX_EXCLUDERGN or DCX_INTERSECTRGN flags and the next
one with or without these flags. */
if(dce->DCXflags & (DCX_EXCLUDERGN | DCX_INTERSECTRGN))
{
/* This is likely to be a nested BeginPaint().
or a BeginPaint() followed by a GetDC()*/
if( dce->hClipRgn != hrgnClip )
{
FIXME("new hrgnClip[%04x] smashes the previous[%04x]\n",
hrgnClip, dce->hClipRgn );
DCE_DeleteClipRgn( dce );
}
else
RestoreVisRgn16(dce->hDC);
}
}
}
if (!dce)
{
hdc = 0;
goto END;
}
dce->hwndCurrent = hwnd;
dce->hClipRgn = 0;
dce->DCXflags = dcxFlags | (flags & DCX_WINDOWPAINT) | DCX_DCEBUSY;
hdc = dce->hDC;
if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC )))
{
hdc = 0;
goto END;
}
bUpdateVisRgn = bUpdateVisRgn || (dc->w.flags & DC_DIRTY);
/* recompute visible region */
wndPtr->pDriver->pSetDrawable( wndPtr, dc, flags, bUpdateClipOrigin );
if( bUpdateVisRgn )
{
TRACE("updating visrgn for %08x dce, hwnd [%04x]\n", (unsigned)dce, hwnd);
if (flags & DCX_PARENTCLIP)
{
WND *parentPtr = WIN_LockWndPtr(wndPtr->parent);
if( wndPtr->dwStyle & WS_VISIBLE && !(parentPtr->dwStyle & WS_MINIMIZE) )
{
if( parentPtr->dwStyle & WS_CLIPSIBLINGS )
dcxFlags = DCX_CLIPSIBLINGS | (flags & ~(DCX_CLIPCHILDREN | DCX_WINDOW));
else
dcxFlags = flags & ~(DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_WINDOW);
hrgnVisible = DCE_GetVisRgn( parentPtr->hwndSelf, dcxFlags,
wndPtr->hwndSelf, flags );
if( flags & DCX_WINDOW )
OffsetRgn( hrgnVisible, -wndPtr->rectWindow.left,
-wndPtr->rectWindow.top );
else
OffsetRgn( hrgnVisible, -wndPtr->rectClient.left,
-wndPtr->rectClient.top );
DCE_OffsetVisRgn( hdc, hrgnVisible );
}
else
hrgnVisible = CreateRectRgn( 0, 0, 0, 0 );
WIN_ReleaseWndPtr(parentPtr);
}
else
if ((hwnd == GetDesktopWindow()) && !DESKTOP_IsSingleWindow())
hrgnVisible = CreateRectRgn( 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN) );
else
{
hrgnVisible = DCE_GetVisRgn( hwnd, flags, 0, 0 );
DCE_OffsetVisRgn( hdc, hrgnVisible );
}
dc->w.flags &= ~DC_DIRTY;
dce->DCXflags &= ~DCX_DCEDIRTY;
SelectVisRgn16( hdc, hrgnVisible );
}
else
TRACE("no visrgn update %08x dce, hwnd [%04x]\n", (unsigned)dce, hwnd);
/* apply additional region operation (if any) */
if( flags & (DCX_EXCLUDERGN | DCX_INTERSECTRGN) )
{
if( !hrgnVisible ) hrgnVisible = CreateRectRgn( 0, 0, 0, 0 );
dce->DCXflags |= flags & (DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_EXCLUDERGN);
dce->hClipRgn = hrgnClip;
TRACE("\tsaved VisRgn, clipRgn = %04x\n", hrgnClip);
SaveVisRgn16( hdc );
CombineRgn( hrgnVisible, hrgnClip, 0, RGN_COPY );
DCE_OffsetVisRgn( hdc, hrgnVisible );
CombineRgn( hrgnVisible, InquireVisRgn16( hdc ), hrgnVisible,
(flags & DCX_INTERSECTRGN) ? RGN_AND : RGN_DIFF );
SelectVisRgn16( hdc, hrgnVisible );
}
if( hrgnVisible ) DeleteObject( hrgnVisible );
TRACE("(%04x,%04x,0x%lx): returning %04x\n",
hwnd, hrgnClip, flags, hdc);
END:
WIN_ReleaseWndPtr(wndPtr);
return hdc;
}
/***********************************************************************
* GetDC16 (USER.66)
*/
HDC16 WINAPI GetDC16( HWND16 hwnd )
{
return (HDC16)GetDC( hwnd );
}
/***********************************************************************
* GetDC32 (USER32.230)
* RETURNS
* :Handle to DC
* NULL: Failure
*/
HDC WINAPI GetDC(
HWND hwnd /* handle of window */
) {
if (!hwnd)
return GetDCEx( GetDesktopWindow(), 0, DCX_CACHE | DCX_WINDOW );
return GetDCEx( hwnd, 0, DCX_USESTYLE );
}
/***********************************************************************
* GetWindowDC16 (USER.67)
*/
HDC16 WINAPI GetWindowDC16( HWND16 hwnd )
{
if (!hwnd) hwnd = GetDesktopWindow16();
return GetDCEx16( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
}
/***********************************************************************
* GetWindowDC32 (USER32.304)
*/
HDC WINAPI GetWindowDC( HWND hwnd )
{
if (!hwnd) hwnd = GetDesktopWindow();
return GetDCEx( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
}
/***********************************************************************
* ReleaseDC16 (USER.68)
*/
INT16 WINAPI ReleaseDC16( HWND16 hwnd, HDC16 hdc )
{
return (INT16)ReleaseDC( hwnd, hdc );
}
/***********************************************************************
* ReleaseDC32 (USER32.440)
*
* RETURNS
* 1: Success
* 0: Failure
*/
INT WINAPI ReleaseDC(
HWND hwnd /* Handle of window - ignored */,
HDC hdc /* Handle of device context */
) {
DCE * dce;
INT nRet = 0;
WIN_LockWnds();
dce = firstDCE;
TRACE("%04x %04x\n", hwnd, hdc );
while (dce && (dce->hDC != hdc)) dce = dce->next;
if ( dce )
if ( dce->DCXflags & DCX_DCEBUSY )
nRet = DCE_ReleaseDC( dce );
WIN_UnlockWnds();
return nRet;
}
/***********************************************************************
* DCHook (USER.362)
*
* See "Undoc. Windows" for hints (DC, SetDCHook, SetHookFlags)..
*/
BOOL16 WINAPI DCHook16( HDC16 hDC, WORD code, DWORD data, LPARAM lParam )
{
BOOL retv = TRUE;
HRGN hVisRgn;
DCE *dce = (DCE *)data;
DC *dc;
WND *wndPtr;
TRACE("hDC = %04x, %i\n", hDC, code);
if (!dce) return 0;
assert(dce->hDC == hDC);
/* Grab the windows lock before doing anything else */
WIN_LockWnds();
switch( code )
{
case DCHC_INVALIDVISRGN:
/* GDI code calls this when it detects that the
* DC is dirty (usually after SetHookFlags()). This
* means that we have to recompute the visible region.
*/
if( dce->DCXflags & DCX_DCEBUSY )
{
/* Update stale DC in DCX */
wndPtr = WIN_FindWndPtr( dce->hwndCurrent);
dc = (DC *) GDI_GetObjPtr( dce->hDC, DC_MAGIC);
if( dc && wndPtr)
wndPtr->pDriver->pSetDrawable( wndPtr, dc,dce->DCXflags,TRUE);
SetHookFlags16(hDC, DCHF_VALIDATEVISRGN);
hVisRgn = DCE_GetVisRgn(dce->hwndCurrent, dce->DCXflags, 0, 0);
TRACE("\tapplying saved clipRgn\n");
/* clip this region with saved clipping region */
if ( (dce->DCXflags & DCX_INTERSECTRGN && dce->hClipRgn != 1) ||
( dce->DCXflags & DCX_EXCLUDERGN && dce->hClipRgn) )
{
if( (!dce->hClipRgn && dce->DCXflags & DCX_INTERSECTRGN) ||
(dce->hClipRgn == 1 && dce->DCXflags & DCX_EXCLUDERGN) )
SetRectRgn(hVisRgn,0,0,0,0);
else
CombineRgn(hVisRgn, hVisRgn, dce->hClipRgn,
(dce->DCXflags & DCX_EXCLUDERGN)? RGN_DIFF:RGN_AND);
}
dce->DCXflags &= ~DCX_DCEDIRTY;
DCE_OffsetVisRgn( hDC, hVisRgn );
SelectVisRgn16(hDC, hVisRgn);
DeleteObject( hVisRgn );
WIN_ReleaseWndPtr( wndPtr ); /* Release WIN_FindWndPtr lock */
}
else /* non-fatal but shouldn't happen */
WARN("DC is not in use!\n");
break;
case DCHC_DELETEDC:
/*
* Windows will not let you delete a DC that is busy
* (between GetDC and ReleaseDC)
*/
if ( dce->DCXflags & DCX_DCEBUSY )
{
WARN("Application trying to delete a busy DC\n");
retv = FALSE;
}
break;
default:
FIXME("unknown code\n");
}
WIN_UnlockWnds(); /* Release the wnd lock */
return retv;
}
/**********************************************************************
* WindowFromDC16 (USER.117)
*/
HWND16 WINAPI WindowFromDC16( HDC16 hDC )
{
return (HWND16)WindowFromDC( hDC );
}
/**********************************************************************
* WindowFromDC32 (USER32.581)
*/
HWND WINAPI WindowFromDC( HDC hDC )
{
DCE *dce;
HWND hwnd;
WIN_LockWnds();
dce = firstDCE;
while (dce && (dce->hDC != hDC)) dce = dce->next;
hwnd = dce ? dce->hwndCurrent : 0;
WIN_UnlockWnds();
return hwnd;
}
/***********************************************************************
* LockWindowUpdate16 (USER.294)
*/
BOOL16 WINAPI LockWindowUpdate16( HWND16 hwnd )
{
return LockWindowUpdate( hwnd );
}
/***********************************************************************
* LockWindowUpdate32 (USER32.378)
*/
BOOL WINAPI LockWindowUpdate( HWND hwnd )
{
/* FIXME? DCX_LOCKWINDOWUPDATE is unimplemented */
return TRUE;
}
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