483 lines
13 KiB
C
483 lines
13 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 "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)
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dc->funcs->pSetDeviceClipping( dc->physDev, dc->hGCClipRgn );
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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 [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 (dc->funcs->pExtSelectClipRgn)
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{
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retval = dc->funcs->pExtSelectClipRgn( dc->physDev, hrgn, fnMode );
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GDI_ReleaseObj( hdc );
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return retval;
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}
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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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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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}
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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 (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->physDev, 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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* 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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HRGN newRgn;
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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->physDev, left, top, right, bottom );
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else
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{
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RECT rect;
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rect.left = left;
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rect.top = top;
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rect.right = right;
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rect.bottom = bottom;
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LPtoDP( hdc, (POINT*)&rect, 2 );
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if (!(newRgn = CreateRectRgn( rect.left, rect.top, rect.right, rect.bottom ))) ret = ERROR;
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else
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{
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if (!dc->hClipRgn)
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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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ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_DIFF );
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DeleteObject( newRgn );
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}
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if (ret != ERROR) 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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* IntersectClipRect (GDI32.@)
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*/
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INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top, 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 %d,%d - %d,%d\n", hdc, left, top, right, bottom );
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if(dc->funcs->pIntersectClipRect)
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ret = dc->funcs->pIntersectClipRect( dc->physDev, left, top, right, bottom );
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else
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{
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RECT rect;
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rect.left = left;
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rect.top = top;
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rect.right = right;
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rect.bottom = bottom;
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LPtoDP( hdc, (POINT*)&rect, 2 );
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if (!dc->hClipRgn)
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{
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dc->hClipRgn = CreateRectRgn( rect.left, rect.top, rect.right, rect.bottom );
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ret = SIMPLEREGION;
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}
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else
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{
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HRGN newRgn;
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if (!(newRgn = CreateRectRgn( rect.left, rect.top, rect.right, rect.bottom))) ret = ERROR;
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else
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{
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ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_AND );
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DeleteObject( newRgn );
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}
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}
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if (ret != ERROR) 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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* 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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HRGN tempRgn;
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INT16 ret;
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RECT rect;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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rect.left = left;
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rect.top = top;
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rect.right = right;
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rect.bottom = bottom;
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LPtoDP( hdc, (POINT*)&rect, 2 );
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TRACE("%04x %d,%d - %d,%d\n", hdc, rect.left, rect.top, rect.right, rect.bottom );
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if (!(tempRgn = CreateRectRgn( rect.left, rect.top, rect.right, rect.bottom ))) ret = ERROR;
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else
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{
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ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_DIFF );
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DeleteObject( tempRgn );
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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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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HRGN tempRgn;
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INT16 ret;
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RECT rect;
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DC * dc = DC_GetDCUpdate( hdc );
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if (!dc) return ERROR;
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rect.left = left;
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rect.top = top;
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rect.right = right;
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rect.bottom = bottom;
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LPtoDP( hdc, (POINT*)&rect, 2 );
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TRACE("%04x %d,%d - %d,%d\n", hdc, rect.left, rect.top, rect.right, rect.bottom );
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if (!(tempRgn = CreateRectRgn( rect.left, rect.top, rect.right, rect.bottom ))) ret = ERROR;
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else
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{
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ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_AND );
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DeleteObject( tempRgn );
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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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 (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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POINT pt;
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pt.x = x;
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pt.y = y;
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LPtoDP( hdc, &pt, 1 );
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ret = PtInRegion( dc->hGCClipRgn, pt.x, pt.y );
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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 (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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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 (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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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.@)
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*/
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INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
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{
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INT ret = -1;
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DC * dc;
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if (hRgn && (dc = DC_GetDCPtr( hdc )))
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{
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if( dc->hClipRgn )
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{
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if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR ) ret = 1;
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}
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else ret = 0;
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GDI_ReleaseObj( hdc );
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}
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return ret;
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}
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/***********************************************************************
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* SaveVisRgn (GDI.129)
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*/
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HRGN16 WINAPI SaveVisRgn16( HDC16 hdc )
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{
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HRGN copy;
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GDIOBJHDR *obj, *copyObj;
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DC *dc = DC_GetDCUpdate( hdc );
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if (!dc) return 0;
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TRACE("%04x\n", hdc );
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if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC )))
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{
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GDI_ReleaseObj( hdc );
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return 0;
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}
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if (!(copy = CreateRectRgn( 0, 0, 0, 0 )))
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{
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GDI_ReleaseObj( dc->hVisRgn );
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GDI_ReleaseObj( hdc );
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return 0;
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}
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CombineRgn( copy, dc->hVisRgn, 0, RGN_COPY );
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if (!(copyObj = GDI_GetObjPtr( copy, REGION_MAGIC )))
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{
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DeleteObject( copy );
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GDI_ReleaseObj( dc->hVisRgn );
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GDI_ReleaseObj( hdc );
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return 0;
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}
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copyObj->hNext = obj->hNext;
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obj->hNext = copy;
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GDI_ReleaseObj( copy );
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GDI_ReleaseObj( dc->hVisRgn );
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GDI_ReleaseObj( hdc );
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return copy;
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}
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/***********************************************************************
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* RestoreVisRgn (GDI.130)
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*/
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INT16 WINAPI RestoreVisRgn16( HDC16 hdc )
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{
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HRGN saved;
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GDIOBJHDR *obj, *savedObj;
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DC *dc = DC_GetDCPtr( hdc );
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INT16 ret = ERROR;
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if (!dc) return ERROR;
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TRACE("%04x\n", hdc );
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if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC ))) goto done;
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saved = obj->hNext;
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if ((savedObj = GDI_GetObjPtr( saved, REGION_MAGIC )))
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{
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ret = CombineRgn( dc->hVisRgn, saved, 0, RGN_COPY );
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obj->hNext = savedObj->hNext;
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GDI_ReleaseObj( saved );
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DeleteObject( saved );
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dc->flags &= ~DC_DIRTY;
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CLIPPING_UpdateGCRegion( dc );
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}
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GDI_ReleaseObj( dc->hVisRgn );
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done:
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GDI_ReleaseObj( hdc );
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return ret;
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}
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