643 lines
17 KiB
C
643 lines
17 KiB
C
/*
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* USER DCE functions
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*
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* Copyright 1993 Alexandre Julliard
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* 1996,1997 Alex Korobka
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*
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*
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* Note: Visible regions of CS_OWNDC/CS_CLASSDC window DCs
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* have to be updated dynamically.
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*
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* Internal DCX flags:
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*
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* DCX_DCEEMPTY - dce is uninitialized
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* DCX_DCEBUSY - dce is in use
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* DCX_DCEDIRTY - ReleaseDC() should wipe instead of caching
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* DCX_KEEPCLIPRGN - ReleaseDC() should not delete the clipping region
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* DCX_WINDOWPAINT - BeginPaint() is in effect
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*/
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#include <assert.h>
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#include "dce.h"
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#include "win.h"
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#include "gdi.h"
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#include "region.h"
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#include "user.h"
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#include "debugtools.h"
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#include "windef.h"
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#include "wingdi.h"
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#include "wine/winbase16.h"
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#include "wine/winuser16.h"
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DEFAULT_DEBUG_CHANNEL(dc);
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static DCE *firstDCE;
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static HDC defaultDCstate;
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static void DCE_DeleteClipRgn( DCE* );
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static INT DCE_ReleaseDC( DCE* );
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/***********************************************************************
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* DCE_DumpCache
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*/
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static void DCE_DumpCache(void)
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{
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DCE *dce;
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USER_Lock();
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dce = firstDCE;
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DPRINTF("DCE:\n");
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while( dce )
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{
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DPRINTF("\t[0x%08x] hWnd 0x%04x, dcx %08x, %s %s\n",
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(unsigned)dce, dce->hwndCurrent, (unsigned)dce->DCXflags,
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(dce->DCXflags & DCX_CACHE) ? "Cache" : "Owned",
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(dce->DCXflags & DCX_DCEBUSY) ? "InUse" : "" );
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dce = dce->next;
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}
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USER_Unlock();
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}
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/***********************************************************************
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* DCE_AllocDCE
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*
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* Allocate a new DCE.
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*/
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DCE *DCE_AllocDCE( HWND hWnd, DCE_TYPE type )
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{
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DCE * dce;
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if (!(dce = HeapAlloc( GetProcessHeap(), 0, sizeof(DCE) ))) return NULL;
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if (!(dce->hDC = CreateDCA( "DISPLAY", NULL, NULL, NULL )))
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{
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HeapFree( GetProcessHeap(), 0, dce );
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return 0;
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}
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if (!defaultDCstate) defaultDCstate = GetDCState16( dce->hDC );
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/* store DCE handle in DC hook data field */
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SetDCHook( dce->hDC, DCHook16, (DWORD)dce );
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dce->hwndCurrent = WIN_GetFullHandle( hWnd );
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dce->hClipRgn = 0;
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if( type != DCE_CACHE_DC ) /* owned or class DC */
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{
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dce->DCXflags = DCX_DCEBUSY;
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if( hWnd )
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{
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LONG style = GetWindowLongW( hWnd, GWL_STYLE );
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if (style & WS_CLIPCHILDREN) dce->DCXflags |= DCX_CLIPCHILDREN;
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if (style & WS_CLIPSIBLINGS) dce->DCXflags |= DCX_CLIPSIBLINGS;
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}
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SetHookFlags16(dce->hDC,DCHF_INVALIDATEVISRGN);
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}
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else dce->DCXflags = DCX_CACHE | DCX_DCEEMPTY;
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USER_Lock();
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dce->next = firstDCE;
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firstDCE = dce;
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USER_Unlock();
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return dce;
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}
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/***********************************************************************
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* DCE_FreeDCE
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*/
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DCE* DCE_FreeDCE( DCE *dce )
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{
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DCE **ppDCE, *ret;
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if (!dce) return NULL;
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USER_Lock();
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ppDCE = &firstDCE;
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while (*ppDCE && (*ppDCE != dce)) ppDCE = &(*ppDCE)->next;
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if (*ppDCE == dce) *ppDCE = dce->next;
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ret = *ppDCE;
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USER_Unlock();
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SetDCHook(dce->hDC, NULL, 0L);
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DeleteDC( dce->hDC );
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if( dce->hClipRgn && !(dce->DCXflags & DCX_KEEPCLIPRGN) )
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DeleteObject(dce->hClipRgn);
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HeapFree( GetProcessHeap(), 0, dce );
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return ret;
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}
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/***********************************************************************
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* DCE_FreeWindowDCE
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*
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* Remove owned DCE and reset unreleased cache DCEs.
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*/
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void DCE_FreeWindowDCE( HWND hwnd )
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{
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DCE *pDCE;
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WND *pWnd = WIN_GetPtr( hwnd );
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pDCE = firstDCE;
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while( pDCE )
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{
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if( pDCE->hwndCurrent == hwnd )
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{
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if( pDCE == pWnd->dce ) /* owned or Class DCE*/
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{
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if (pWnd->clsStyle & CS_OWNDC) /* owned DCE*/
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{
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pDCE = DCE_FreeDCE( pDCE );
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pWnd->dce = NULL;
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continue;
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}
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else if( pDCE->DCXflags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN) ) /* Class DCE*/
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{
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DCE_DeleteClipRgn( pDCE );
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pDCE->hwndCurrent = 0;
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}
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}
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else
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{
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if( pDCE->DCXflags & DCX_DCEBUSY ) /* shared cache DCE */
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{
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/* FIXME: AFAICS we are doing the right thing here so
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* this should be a WARN. But this is best left as an ERR
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* because the 'application error' is likely to come from
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* another part of Wine (i.e. it's our fault after all).
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* We should change this to WARN when Wine is more stable
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* (for 1.0?).
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*/
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ERR("[%08x] GetDC() without ReleaseDC()!\n",hwnd);
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DCE_ReleaseDC( pDCE );
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}
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pDCE->DCXflags &= DCX_CACHE;
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pDCE->DCXflags |= DCX_DCEEMPTY;
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pDCE->hwndCurrent = 0;
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}
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}
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pDCE = pDCE->next;
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}
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WIN_ReleasePtr( pWnd );
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}
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/***********************************************************************
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* DCE_DeleteClipRgn
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*/
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static void DCE_DeleteClipRgn( DCE* dce )
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{
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dce->DCXflags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN | DCX_WINDOWPAINT);
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if( dce->DCXflags & DCX_KEEPCLIPRGN )
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dce->DCXflags &= ~DCX_KEEPCLIPRGN;
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else
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if( dce->hClipRgn > 1 )
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DeleteObject( dce->hClipRgn );
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dce->hClipRgn = 0;
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/* make it dirty so that the vis rgn gets recomputed next time */
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dce->DCXflags |= DCX_DCEDIRTY;
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SetHookFlags16( dce->hDC, DCHF_INVALIDATEVISRGN );
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}
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/***********************************************************************
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* DCE_ReleaseDC
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*/
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static INT DCE_ReleaseDC( DCE* dce )
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{
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if ((dce->DCXflags & (DCX_DCEEMPTY | DCX_DCEBUSY)) != DCX_DCEBUSY) return 0;
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/* restore previous visible region */
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if ((dce->DCXflags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
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(dce->DCXflags & (DCX_CACHE | DCX_WINDOWPAINT)) )
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DCE_DeleteClipRgn( dce );
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if (dce->DCXflags & DCX_CACHE)
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{
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SetDCState16( dce->hDC, defaultDCstate );
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dce->DCXflags &= ~DCX_DCEBUSY;
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if (dce->DCXflags & DCX_DCEDIRTY)
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{
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/* don't keep around invalidated entries
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* because SetDCState() disables hVisRgn updates
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* by removing dirty bit. */
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dce->hwndCurrent = 0;
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dce->DCXflags &= DCX_CACHE;
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dce->DCXflags |= DCX_DCEEMPTY;
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}
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}
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return 1;
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}
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/***********************************************************************
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* DCE_InvalidateDCE
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*
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* It is called from SetWindowPos() and EVENT_MapNotify - we have to
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* mark as dirty all busy DCEs for windows that have pWnd->parent as
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* an ancestor and whose client rect intersects with specified update
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* rectangle. In addition, pWnd->parent DCEs may need to be updated if
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* DCX_CLIPCHILDREN flag is set. */
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BOOL DCE_InvalidateDCE(HWND hwnd, const RECT* pRectUpdate)
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{
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HWND hwndScope = GetAncestor( hwnd, GA_PARENT );
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BOOL bRet = FALSE;
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if( hwndScope )
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{
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DCE *dce;
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TRACE("scope hwnd = %04x, (%i,%i - %i,%i)\n",
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hwndScope, pRectUpdate->left,pRectUpdate->top,
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pRectUpdate->right,pRectUpdate->bottom);
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if(TRACE_ON(dc))
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DCE_DumpCache();
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/* walk all DCEs and fixup non-empty entries */
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for (dce = firstDCE; (dce); dce = dce->next)
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{
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if (dce->DCXflags & DCX_DCEEMPTY) continue;
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if ((dce->hwndCurrent == hwndScope) && !(dce->DCXflags & DCX_CLIPCHILDREN))
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continue; /* child window positions don't bother us */
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/* check if DCE window is within the z-order scope */
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if (hwndScope == dce->hwndCurrent || IsChild( hwndScope, dce->hwndCurrent ))
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{
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if (hwnd != dce->hwndCurrent)
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{
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/* check if the window rectangle intersects this DCE window */
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RECT rect;
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GetWindowRect( dce->hwndCurrent, &rect );
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MapWindowPoints( 0, hwndScope, (POINT *)&rect, 2 );
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if (!IntersectRect( &rect, &rect, pRectUpdate )) continue;
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}
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if( !(dce->DCXflags & DCX_DCEBUSY) )
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{
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/* Don't bother with visible regions of unused DCEs */
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TRACE("\tpurged %p dce [%04x]\n", dce, dce->hwndCurrent);
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dce->hwndCurrent = 0;
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dce->DCXflags &= DCX_CACHE;
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dce->DCXflags |= DCX_DCEEMPTY;
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}
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else
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{
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/* Set dirty bits in the hDC and DCE structs */
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TRACE("\tfixed up %p dce [%04x]\n", dce, dce->hwndCurrent);
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dce->DCXflags |= DCX_DCEDIRTY;
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SetHookFlags16(dce->hDC, DCHF_INVALIDATEVISRGN);
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bRet = TRUE;
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}
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}
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} /* dce list */
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}
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return bRet;
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}
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/***********************************************************************
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* DCE_ExcludeRgn
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*
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* Translate given region from the wnd client to the DC coordinates
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* and add it to the clipping region.
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*/
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INT DCE_ExcludeRgn( HDC hDC, HWND hwnd, HRGN hRgn )
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{
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POINT pt = {0, 0};
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DCE *dce = firstDCE;
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while (dce && (dce->hDC != hDC)) dce = dce->next;
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if (!dce) return ERROR;
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MapWindowPoints( hwnd, dce->hwndCurrent, &pt, 1);
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if( dce->DCXflags & DCX_WINDOW )
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{
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WND *wnd = WIN_FindWndPtr(dce->hwndCurrent);
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pt.x += wnd->rectClient.left - wnd->rectWindow.left;
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pt.y += wnd->rectClient.top - wnd->rectWindow.top;
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WIN_ReleaseWndPtr(wnd);
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}
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OffsetRgn(hRgn, pt.x, pt.y);
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return ExtSelectClipRgn( hDC, hRgn, RGN_DIFF );
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}
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/***********************************************************************
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* GetDCEx (USER32.@)
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*
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* Unimplemented flags: DCX_LOCKWINDOWUPDATE
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*
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* FIXME: Full support for hrgnClip == 1 (alias for entire window).
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*/
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HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags )
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{
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HDC hdc = 0;
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DCE * dce;
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WND * wndPtr;
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DWORD dcxFlags = 0;
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BOOL bUpdateVisRgn = TRUE;
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BOOL bUpdateClipOrigin = FALSE;
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HWND parent, full;
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TRACE("hwnd %04x, hrgnClip %04x, flags %08x\n",
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hwnd, hrgnClip, (unsigned)flags);
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if (!hwnd) hwnd = GetDesktopWindow();
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if (!(full = WIN_IsCurrentProcess( hwnd )))
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{
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FIXME( "not supported yet on other process window %x\n", hwnd );
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return 0;
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}
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hwnd = full;
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if (!(wndPtr = WIN_GetPtr( hwnd ))) return 0;
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/* fixup flags */
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if (flags & (DCX_WINDOW | DCX_PARENTCLIP)) flags |= DCX_CACHE;
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if (flags & DCX_USESTYLE)
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{
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flags &= ~( DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
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if( wndPtr->dwStyle & WS_CLIPSIBLINGS )
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flags |= DCX_CLIPSIBLINGS;
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if ( !(flags & DCX_WINDOW) )
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{
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if (wndPtr->clsStyle & CS_PARENTDC) flags |= DCX_PARENTCLIP;
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if (wndPtr->dwStyle & WS_CLIPCHILDREN &&
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!(wndPtr->dwStyle & WS_MINIMIZE) ) flags |= DCX_CLIPCHILDREN;
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if (!wndPtr->dce) flags |= DCX_CACHE;
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}
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}
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if (flags & DCX_WINDOW) flags &= ~DCX_CLIPCHILDREN;
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parent = GetAncestor( hwnd, GA_PARENT );
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if (!parent || (parent == GetDesktopWindow()))
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flags = (flags & ~DCX_PARENTCLIP) | DCX_CLIPSIBLINGS;
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/* it seems parent clip is ignored when clipping siblings or children */
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if (flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) flags &= ~DCX_PARENTCLIP;
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if( flags & DCX_PARENTCLIP )
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{
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LONG parent_style = GetWindowLongW( parent, GWL_STYLE );
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if( (wndPtr->dwStyle & WS_VISIBLE) && (parent_style & WS_VISIBLE) )
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{
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flags &= ~DCX_CLIPCHILDREN;
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if (parent_style & WS_CLIPSIBLINGS) flags |= DCX_CLIPSIBLINGS;
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}
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}
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/* find a suitable DCE */
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dcxFlags = flags & (DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
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DCX_CACHE | DCX_WINDOW);
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if (flags & DCX_CACHE)
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{
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DCE* dceEmpty;
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DCE* dceUnused;
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dceEmpty = dceUnused = NULL;
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/* Strategy: First, we attempt to find a non-empty but unused DCE with
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* compatible flags. Next, we look for an empty entry. If the cache is
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* full we have to purge one of the unused entries.
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*/
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for (dce = firstDCE; (dce); dce = dce->next)
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{
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if ((dce->DCXflags & (DCX_CACHE | DCX_DCEBUSY)) == DCX_CACHE )
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{
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dceUnused = dce;
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if (dce->DCXflags & DCX_DCEEMPTY)
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dceEmpty = dce;
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else
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if ((dce->hwndCurrent == hwnd) &&
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((dce->DCXflags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
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DCX_CACHE | DCX_WINDOW | DCX_PARENTCLIP)) == dcxFlags))
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{
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TRACE("\tfound valid %08x dce [%04x], flags %08x\n",
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(unsigned)dce, hwnd, (unsigned)dcxFlags );
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bUpdateVisRgn = FALSE;
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bUpdateClipOrigin = TRUE;
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break;
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}
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}
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}
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if (!dce) dce = (dceEmpty) ? dceEmpty : dceUnused;
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/* if there's no dce empty or unused, allocate a new one */
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if (!dce)
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{
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dce = DCE_AllocDCE( 0, DCE_CACHE_DC );
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}
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}
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else
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{
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dce = wndPtr->dce;
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if (dce && dce->hwndCurrent == hwnd)
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{
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TRACE("\tskipping hVisRgn update\n");
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bUpdateVisRgn = FALSE; /* updated automatically, via DCHook() */
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}
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}
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if (!dce)
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{
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hdc = 0;
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goto END;
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}
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if (!(flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN))) hrgnClip = 0;
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if (((flags ^ dce->DCXflags) & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
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(dce->hClipRgn != hrgnClip))
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{
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/* if the extra clip region has changed, get rid of the old one */
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DCE_DeleteClipRgn( dce );
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}
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dce->hwndCurrent = hwnd;
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dce->hClipRgn = hrgnClip;
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dce->DCXflags = flags & (DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
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DCX_CACHE | DCX_WINDOW | DCX_WINDOWPAINT |
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DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_EXCLUDERGN);
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dce->DCXflags |= DCX_DCEBUSY;
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dce->DCXflags &= ~DCX_DCEDIRTY;
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hdc = dce->hDC;
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if (bUpdateVisRgn) SetHookFlags16( hdc, DCHF_INVALIDATEVISRGN ); /* force update */
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if (!USER_Driver.pGetDC( hwnd, hdc, hrgnClip, flags )) hdc = 0;
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TRACE("(%04x,%04x,0x%lx): returning %04x\n", hwnd, hrgnClip, flags, hdc);
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END:
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WIN_ReleasePtr(wndPtr);
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|
return hdc;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetDC (USER32.@)
|
|
* RETURNS
|
|
* :Handle to DC
|
|
* NULL: Failure
|
|
*/
|
|
HDC WINAPI GetDC(
|
|
HWND hwnd /* [in] handle of window */
|
|
) {
|
|
if (!hwnd)
|
|
return GetDCEx( 0, 0, DCX_CACHE | DCX_WINDOW );
|
|
return GetDCEx( hwnd, 0, DCX_USESTYLE );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetWindowDC (USER32.@)
|
|
*/
|
|
HDC WINAPI GetWindowDC( HWND hwnd )
|
|
{
|
|
return GetDCEx( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* ReleaseDC (USER32.@)
|
|
*
|
|
* RETURNS
|
|
* 1: Success
|
|
* 0: Failure
|
|
*/
|
|
INT WINAPI ReleaseDC(
|
|
HWND hwnd /* [in] Handle of window - ignored */,
|
|
HDC hdc /* [in] Handle of device context */
|
|
) {
|
|
DCE * dce;
|
|
INT nRet = 0;
|
|
|
|
USER_Lock();
|
|
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 );
|
|
|
|
USER_Unlock();
|
|
|
|
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;
|
|
DCE *dce = (DCE *)data;
|
|
|
|
TRACE("hDC = %04x, %i\n", hDC, code);
|
|
|
|
if (!dce) return 0;
|
|
assert(dce->hDC == hDC);
|
|
|
|
/* Grab the windows lock before doing anything else */
|
|
USER_Lock();
|
|
|
|
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 )
|
|
{
|
|
/* Dirty bit has been cleared by caller, set it again so that
|
|
* pGetDC recomputes the visible region. */
|
|
SetHookFlags16( dce->hDC, DCHF_INVALIDATEVISRGN );
|
|
USER_Driver.pGetDC( dce->hwndCurrent, dce->hDC, dce->hClipRgn, dce->DCXflags );
|
|
}
|
|
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;
|
|
}
|
|
else DCE_FreeDCE( dce );
|
|
break;
|
|
|
|
default:
|
|
FIXME("unknown code\n");
|
|
}
|
|
|
|
USER_Unlock(); /* Release the wnd lock */
|
|
return retv;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* WindowFromDC (USER32.@)
|
|
*/
|
|
HWND WINAPI WindowFromDC( HDC hDC )
|
|
{
|
|
DCE *dce;
|
|
HWND hwnd;
|
|
|
|
USER_Lock();
|
|
dce = firstDCE;
|
|
|
|
while (dce && (dce->hDC != hDC)) dce = dce->next;
|
|
|
|
hwnd = dce ? dce->hwndCurrent : 0;
|
|
USER_Unlock();
|
|
|
|
return hwnd;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LockWindowUpdate (USER32.@)
|
|
*/
|
|
BOOL WINAPI LockWindowUpdate( HWND hwnd )
|
|
{
|
|
FIXME("(%x), stub!\n",hwnd);
|
|
return TRUE;
|
|
}
|