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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef _BGFX_TOOLS_CLIPSTATE_HXX
#define _BGFX_TOOLS_CLIPSTATE_HXX
#include <sal/types.h>
#include <o3tl/cow_wrapper.hxx>
#include <basegfx/basegfxdllapi.h>
//////////////////////////////////////////////////////////////////////////////
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 BASEGFX_DLLPUBLIC 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 B2DPolyPolygon& );
B2DClipState& operator=( const B2DClipState& );
/// Set clip to 'null' - nothing is visible
void makeNull();
/// 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 unionPolyPolygon(const B2DPolyPolygon& );
void intersectRange(const B2DRange& );
void intersectPolyPolygon(const B2DPolyPolygon& );
void subtractRange(const B2DRange& );
void subtractPolyPolygon(const B2DPolyPolygon& );
void xorRange(const B2DRange& );
void xorPolyPolygon(const B2DPolyPolygon& );
B2DPolyPolygon getClipPoly() const;
};
}
}
#endif // _BGFX_TOOLS_CLIPSTATE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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