91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <o3tl/cow_wrapper.hxx>
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#include <basegfx/basegfxdllapi.h>
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namespace basegfx
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{
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class B2DRange;
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class B2DPolyPolygon;
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class B2DHomMatrix;
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}
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namespace basegfx::utils
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{
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class ImplB2DClipState;
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/** This class provides an optimized, symbolic clip state for graphical output
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Having a current 'clip' state is a common attribute of
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almost all graphic output APIs, most of which internally
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represent it via a list of rectangular bands. In contrast,
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this implementation purely uses symbolic clips, but in a
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quite efficient manner, deferring actual evaluation until
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a clip representation is requested, and using faster code
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paths for common special cases (like all-rectangle clips)
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*/
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class BASEGFX_DLLPUBLIC B2DClipState
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{
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public:
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typedef o3tl::cow_wrapper< ImplB2DClipState > ImplType;
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private:
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ImplType mpImpl;
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public:
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/// Init clip, in 'cleared' state - everything is visible
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B2DClipState();
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~B2DClipState();
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B2DClipState( const B2DClipState& );
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B2DClipState( B2DClipState&& );
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explicit B2DClipState( const B2DPolyPolygon& );
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B2DClipState& operator=( const B2DClipState& );
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B2DClipState& operator=( B2DClipState&& );
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/// Set clip to 'null' - nothing is visible
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void makeNull();
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/// returns true when clip is 'cleared' - everything is visible
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bool isCleared() const;
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bool operator==(const B2DClipState&) const;
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void unionRange(const B2DRange& );
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void unionPolyPolygon(const B2DPolyPolygon& );
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void intersectRange(const B2DRange& );
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void intersectPolyPolygon(const B2DPolyPolygon& );
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void subtractRange(const B2DRange& );
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void subtractPolyPolygon(const B2DPolyPolygon& );
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void xorRange(const B2DRange& );
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void xorPolyPolygon(const B2DPolyPolygon& );
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void transform(const B2DHomMatrix& );
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B2DPolyPolygon const & getClipPoly() const;
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};
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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