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Diffstat (limited to 'basegfx/inc/basegfx/tools/b2dclipstate.hxx')
-rw-r--r-- | basegfx/inc/basegfx/tools/b2dclipstate.hxx | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/tools/b2dclipstate.hxx b/basegfx/inc/basegfx/tools/b2dclipstate.hxx new file mode 100644 index 000000000000..a835eec82cbd --- /dev/null +++ b/basegfx/inc/basegfx/tools/b2dclipstate.hxx @@ -0,0 +1,119 @@ +/* -*- 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 + * + * 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: */ |