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620 lines
17 KiB
C
620 lines
17 KiB
C
/*
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* DC clipping functions
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*
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* Copyright 1993 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h>
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#include "windef.h"
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#include "wingdi.h"
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#include "wine/winuser16.h"
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#include "gdi.h"
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#include "region.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(clipping);
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/***********************************************************************
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* CLIPPING_UpdateGCRegion
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*
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* Update the GC clip region when the ClipRgn or VisRgn have changed.
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*/
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void CLIPPING_UpdateGCRegion( DC * dc )
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{
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if (!dc->hGCClipRgn) dc->hGCClipRgn = CreateRectRgn( 0, 0, 0, 0 );
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if (!dc->hVisRgn)
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{
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ERR("hVisRgn is zero. Please report this.\n" );
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exit(1);
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}
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if (dc->flags & DC_DIRTY) ERR( "DC is dirty. Please report this.\n" );
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if (!dc->hClipRgn)
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CombineRgn( dc->hGCClipRgn, dc->hVisRgn, 0, RGN_COPY );
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else
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CombineRgn(dc->hGCClipRgn, dc->hClipRgn, dc->hVisRgn, RGN_AND);
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if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc );
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}
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/***********************************************************************
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* SelectClipRgn (GDI.44)
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*/
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INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn )
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{
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return (INT16)SelectClipRgn( hdc, hrgn );
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}
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/***********************************************************************
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* SelectClipRgn (GDI32.@)
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*/
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INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
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{
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return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
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}
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/******************************************************************************
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* ExtSelectClipRgn [GDI.508]
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*/
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INT16 WINAPI ExtSelectClipRgn16( HDC16 hdc, HRGN16 hrgn, INT16 fnMode )
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{
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return (INT16) ExtSelectClipRgn((HDC) hdc, (HRGN) hrgn, fnMode);
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}
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/******************************************************************************
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* ExtSelectClipRgn [GDI32.@]
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*/
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INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
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{
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INT retval;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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TRACE("%04x %04x %d\n", hdc, hrgn, fnMode );
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if (!hrgn)
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{
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if (fnMode == RGN_COPY)
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{
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if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
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dc->hClipRgn = 0;
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retval = SIMPLEREGION; /* Clip region == whole DC */
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}
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else
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{
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FIXME("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
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GDI_ReleaseObj( hdc );
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return ERROR;
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}
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}
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else
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{
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if (!dc->hClipRgn)
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{
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RECT rect;
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GetRgnBox( dc->hVisRgn, &rect );
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dc->hClipRgn = CreateRectRgnIndirect( &rect );
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}
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OffsetRgn( dc->hClipRgn, -dc->DCOrgX, -dc->DCOrgY );
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if(fnMode == RGN_COPY)
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retval = CombineRgn( dc->hClipRgn, hrgn, 0, fnMode );
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else
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retval = CombineRgn( dc->hClipRgn, dc->hClipRgn, hrgn, fnMode);
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OffsetRgn( dc->hClipRgn, dc->DCOrgX, dc->DCOrgY );
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}
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CLIPPING_UpdateGCRegion( dc );
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GDI_ReleaseObj( hdc );
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return retval;
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}
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/***********************************************************************
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* SelectVisRgn (GDI.105)
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*/
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INT16 WINAPI SelectVisRgn16( HDC16 hdc, HRGN16 hrgn )
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{
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int retval;
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DC * dc;
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if (!hrgn) return ERROR;
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if (!(dc = DC_GetDCPtr( hdc ))) return ERROR;
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TRACE("%04x %04x\n", hdc, hrgn );
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dc->flags &= ~DC_DIRTY;
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retval = CombineRgn16( dc->hVisRgn, hrgn, 0, RGN_COPY );
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CLIPPING_UpdateGCRegion( dc );
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GDI_ReleaseObj( hdc );
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return retval;
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}
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/***********************************************************************
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* OffsetClipRgn (GDI.32)
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*/
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INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y )
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{
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return (INT16)OffsetClipRgn( hdc, x, y );
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}
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/***********************************************************************
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* OffsetClipRgn (GDI32.@)
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*/
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INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
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{
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INT ret = SIMPLEREGION;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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TRACE("%04x %d,%d\n", hdc, x, y );
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if(dc->funcs->pOffsetClipRgn)
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ret = dc->funcs->pOffsetClipRgn( dc, x, y );
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else if (dc->hClipRgn) {
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ret = OffsetRgn( dc->hClipRgn, XLSTODS(dc,x), YLSTODS(dc,y));
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CLIPPING_UpdateGCRegion( dc );
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* OffsetVisRgn (GDI.102)
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*/
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INT16 WINAPI OffsetVisRgn16( HDC16 hdc, INT16 x, INT16 y )
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{
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INT16 retval;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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TRACE("%04x %d,%d\n", hdc, x, y );
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retval = OffsetRgn( dc->hVisRgn, x, y );
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CLIPPING_UpdateGCRegion( dc );
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GDI_ReleaseObj( hdc );
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return retval;
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}
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/***********************************************************************
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* CLIPPING_IntersectClipRect
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*
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* Helper function for {Intersect,Exclude}ClipRect, can be called from
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* elsewhere (like ExtTextOut()) to skip redundant metafile update and
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* coordinate conversion.
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*/
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INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
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INT right, INT bottom, UINT flags )
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{
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HRGN newRgn;
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INT ret;
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left += dc->DCOrgX;
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right += dc->DCOrgX;
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top += dc->DCOrgY;
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bottom += dc->DCOrgY;
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if (!(newRgn = CreateRectRgn( left, top, right, bottom ))) return ERROR;
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if (!dc->hClipRgn)
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{
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if( flags & CLIP_INTERSECT )
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{
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dc->hClipRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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return SIMPLEREGION;
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}
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else if( flags & CLIP_EXCLUDE )
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{
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dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( dc->hClipRgn, dc->hVisRgn, 0, RGN_COPY );
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}
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else WARN("No hClipRgn and flags are %x\n",flags);
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}
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ret = CombineRgn( newRgn, dc->hClipRgn, newRgn,
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(flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND );
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if (ret != ERROR)
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{
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if (!(flags & CLIP_KEEPRGN)) DeleteObject( dc->hClipRgn );
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dc->hClipRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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}
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else DeleteObject( newRgn );
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return ret;
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}
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/***********************************************************************
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* ExcludeClipRect (GDI.21)
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*/
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INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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return (INT16)ExcludeClipRect( hdc, left, top, right, bottom );
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}
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/***********************************************************************
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* ExcludeClipRect (GDI32.@)
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*/
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INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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INT ret;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
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if(dc->funcs->pExcludeClipRect)
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ret = dc->funcs->pExcludeClipRect( dc, left, top, right, bottom );
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else {
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* IntersectClipRect (GDI.22)
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*/
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INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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return (INT16)IntersectClipRect( hdc, left, top, right, bottom );
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}
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/***********************************************************************
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* IntersectClipRect (GDI32.@)
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*/
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INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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INT ret;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
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if(dc->funcs->pIntersectClipRect)
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ret = dc->funcs->pIntersectClipRect( dc, left, top, right, bottom );
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else {
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* CLIPPING_IntersectVisRect
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*
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* Helper function for {Intersect,Exclude}VisRect, can be called from
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* elsewhere (like ExtTextOut()) to skip redundant metafile update and
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* coordinate conversion.
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*/
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INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
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INT right, INT bottom,
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BOOL exclude )
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{
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HRGN tempRgn, newRgn;
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INT ret;
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left += dc->DCOrgX;
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right += dc->DCOrgX;
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top += dc->DCOrgY;
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bottom += dc->DCOrgY;
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if (!(newRgn = CreateRectRgn( 0, 0, 0, 0 ))) return ERROR;
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if (!(tempRgn = CreateRectRgn( left, top, right, bottom )))
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{
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DeleteObject( newRgn );
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return ERROR;
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}
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ret = CombineRgn( newRgn, dc->hVisRgn, tempRgn,
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exclude ? RGN_DIFF : RGN_AND );
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DeleteObject( tempRgn );
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if (ret != ERROR)
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{
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RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC);
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if (newObj)
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{
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RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC);
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if (prevObj)
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{
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newObj->header.hNext = prevObj->header.hNext;
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GDI_ReleaseObj( dc->hVisRgn );
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}
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GDI_ReleaseObj( newRgn );
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}
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DeleteObject( dc->hVisRgn );
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dc->hVisRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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}
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else DeleteObject( newRgn );
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return ret;
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}
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/***********************************************************************
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* ExcludeVisRect (GDI.73)
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*/
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INT16 WINAPI ExcludeVisRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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INT16 ret;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
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ret = CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE );
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* IntersectVisRect (GDI.98)
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*/
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INT16 WINAPI IntersectVisRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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INT16 ret;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
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ret = CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE );
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* PtVisible (GDI.103)
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*/
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BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y )
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{
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return PtVisible( hdc, x, y );
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}
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/***********************************************************************
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* PtVisible (GDI32.@)
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*/
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BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
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{
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BOOL ret = FALSE;
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DC *dc = DC_GetDCUpdate( hdc );
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TRACE("%04x %d,%d\n", hdc, x, y );
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if (!dc) return FALSE;
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if (dc->hGCClipRgn)
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{
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ret = PtInRegion( dc->hGCClipRgn, XLPTODP(dc,x) + dc->DCOrgX,
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YLPTODP(dc,y) + dc->DCOrgY );
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* RectVisible (GDI.465)
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* RectVisibleOld (GDI.104)
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*/
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BOOL16 WINAPI RectVisible16( HDC16 hdc, const RECT16* rect16 )
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{
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RECT rect;
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CONV_RECT16TO32( rect16, &rect );
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return RectVisible( hdc, &rect );
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}
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/***********************************************************************
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* RectVisible (GDI32.@)
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*/
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BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
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{
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BOOL ret = FALSE;
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RECT tmpRect;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return FALSE;
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TRACE("%04x %d,%dx%d,%d\n",
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hdc, rect->left, rect->top, rect->right, rect->bottom );
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if (dc->hGCClipRgn)
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{
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/* copy rectangle to avoid overwriting by LPtoDP */
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tmpRect = *rect;
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LPtoDP( hdc, (LPPOINT)&tmpRect, 2 );
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tmpRect.left += dc->DCOrgX;
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tmpRect.right += dc->DCOrgX;
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tmpRect.top += dc->DCOrgY;
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tmpRect.bottom += dc->DCOrgY;
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ret = RectInRegion( dc->hGCClipRgn, &tmpRect );
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}
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* GetClipBox (GDI.77)
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*/
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INT16 WINAPI GetClipBox16( HDC16 hdc, LPRECT16 rect )
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{
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int ret;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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ret = GetRgnBox16( dc->hGCClipRgn, rect );
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rect->left -= dc->DCOrgX;
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rect->right -= dc->DCOrgX;
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rect->top -= dc->DCOrgY;
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rect->bottom -= dc->DCOrgY;
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DPtoLP16( hdc, (LPPOINT16)rect, 2 );
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TRACE("%d,%d-%d,%d\n", rect->left,rect->top,rect->right,rect->bottom );
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* GetClipBox (GDI32.@)
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*/
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INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
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{
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INT ret;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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ret = GetRgnBox( dc->hGCClipRgn, rect );
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rect->left -= dc->DCOrgX;
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rect->right -= dc->DCOrgX;
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rect->top -= dc->DCOrgY;
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rect->bottom -= dc->DCOrgY;
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DPtoLP( hdc, (LPPOINT)rect, 2 );
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* GetClipRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
|
|
{
|
|
INT ret = -1;
|
|
DC * dc;
|
|
if (hRgn && (dc = DC_GetDCPtr( hdc )))
|
|
{
|
|
if( dc->hClipRgn )
|
|
{
|
|
/* this assumes that dc->hClipRgn is in coordinates
|
|
relative to the device (not DC origin) */
|
|
|
|
if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR )
|
|
{
|
|
OffsetRgn( hRgn, -dc->DCOrgX, -dc->DCOrgY );
|
|
ret = 1;
|
|
}
|
|
}
|
|
else ret = 0;
|
|
GDI_ReleaseObj( hdc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SaveVisRgn (GDI.129)
|
|
*/
|
|
HRGN16 WINAPI SaveVisRgn16( HDC16 hdc )
|
|
{
|
|
HRGN copy;
|
|
RGNOBJ *obj, *copyObj;
|
|
DC *dc = DC_GetDCUpdate( hdc );
|
|
|
|
if (!dc) return 0;
|
|
TRACE("%04x\n", hdc );
|
|
|
|
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC )))
|
|
{
|
|
GDI_ReleaseObj( hdc );
|
|
return 0;
|
|
}
|
|
if (!(copy = CreateRectRgn( 0, 0, 0, 0 )))
|
|
{
|
|
GDI_ReleaseObj( dc->hVisRgn );
|
|
GDI_ReleaseObj( hdc );
|
|
return 0;
|
|
}
|
|
CombineRgn( copy, dc->hVisRgn, 0, RGN_COPY );
|
|
if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
|
|
{
|
|
DeleteObject( copy );
|
|
GDI_ReleaseObj( dc->hVisRgn );
|
|
GDI_ReleaseObj( hdc );
|
|
return 0;
|
|
}
|
|
copyObj->header.hNext = obj->header.hNext;
|
|
obj->header.hNext = copy;
|
|
GDI_ReleaseObj( copy );
|
|
GDI_ReleaseObj( dc->hVisRgn );
|
|
GDI_ReleaseObj( hdc );
|
|
return copy;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RestoreVisRgn (GDI.130)
|
|
*/
|
|
INT16 WINAPI RestoreVisRgn16( HDC16 hdc )
|
|
{
|
|
HRGN saved;
|
|
RGNOBJ *obj, *savedObj;
|
|
DC *dc = DC_GetDCPtr( hdc );
|
|
INT16 ret = ERROR;
|
|
|
|
if (!dc) return ERROR;
|
|
if (!dc->hVisRgn) goto done;
|
|
TRACE("%04x\n", hdc );
|
|
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC ))) goto done;
|
|
|
|
saved = obj->header.hNext;
|
|
GDI_ReleaseObj( dc->hVisRgn );
|
|
if (!saved || !(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC ))) goto done;
|
|
|
|
DeleteObject( dc->hVisRgn );
|
|
dc->hVisRgn = saved;
|
|
dc->flags &= ~DC_DIRTY;
|
|
CLIPPING_UpdateGCRegion( dc );
|
|
ret = savedObj->rgn->type; /* FIXME */
|
|
GDI_ReleaseObj( saved );
|
|
done:
|
|
GDI_ReleaseObj( hdc );
|
|
return ret;
|
|
}
|