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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: rectcliptools.hxx,v $
* $Revision: 1.3 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _BGFX_TOOLS_CLIPSTATE_HXX
#define _BGFX_TOOLS_CLIPSTATE_HXX
#include <sal/types.h>
#include <o3tl/cow_wrapper.hxx>
//////////////////////////////////////////////////////////////////////////////
namespace basegfx
{
class B2DRange;
class B2DPolyRange;
class B2DPolygon;
class B2DPolyPolygon;
namespace tools
{
class ImplB2DClipState;
/** This class provides an optimized, symbolic clip state for graphical output
Having a current 'clip' state is a common attribute of
almost all graphic output APIs, most of which internally
represent it via a list of rectangular bands. In contrast,
this implementation purely uses symbolic clips, but in a
quite efficient manner, deferring actual evaluation until
a clip representation is requested, and using faster code
paths for common special cases (like all-rectangle clips)
*/
class B2DClipState
{
public:
typedef o3tl::cow_wrapper< ImplB2DClipState > ImplType;
private:
ImplType mpImpl;
public:
/// Init clip, in 'cleared' state - everything is visible
B2DClipState();
~B2DClipState();
B2DClipState( const B2DClipState& );
explicit B2DClipState( const B2DRange& );
explicit B2DClipState( const B2DPolygon& );
explicit B2DClipState( const B2DPolyPolygon& );
B2DClipState& operator=( const B2DClipState& );
/// unshare this poly-range with all internally shared instances
void makeUnique();
/// Set clip to 'null' - nothing is visible
void makeNull();
/// returns true when clip is 'null' - nothing is visible
bool isNull() const;
/// Set clip 'cleared' - everything is visible
void makeClear();
/// returns true when clip is 'cleared' - everything is visible
bool isCleared() const;
bool operator==(const B2DClipState&) const;
bool operator!=(const B2DClipState&) const;
void unionRange(const B2DRange& );
void unionPolygon(const B2DPolygon& );
void unionPolyPolygon(const B2DPolyPolygon& );
void unionClipState(const B2DClipState& );
void intersectRange(const B2DRange& );
void intersectPolygon(const B2DPolygon& );
void intersectPolyPolygon(const B2DPolyPolygon& );
void intersectClipState(const B2DClipState& );
void subtractRange(const B2DRange& );
void subtractPolygon(const B2DPolygon& );
void subtractPolyPolygon(const B2DPolyPolygon& );
void subtractClipState(const B2DClipState& );
void xorRange(const B2DRange& );
void xorPolygon(const B2DPolygon& );
void xorPolyPolygon(const B2DPolyPolygon& );
void xorClipState(const B2DClipState& );
B2DPolyPolygon getClipPoly() const;
};
}
}
#endif // _BGFX_TOOLS_CLIPSTATE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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