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| -rw-r--r-- | include/vcl/region.hxx | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/include/vcl/region.hxx b/include/vcl/region.hxx new file mode 100644 index 000000000..8d5004c18 --- /dev/null +++ b/include/vcl/region.hxx @@ -0,0 +1,167 @@ +/* -*- 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 INCLUDED_VCL_REGION_HXX +#define INCLUDED_VCL_REGION_HXX + +#include <tools/gen.hxx> +#include <tools/poly.hxx> +#include <vcl/dllapi.h> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <memory> +#include <optional> + +class RegionBand; + +namespace vcl { class Window; } +class OutputDevice; +class Bitmap; + +typedef std::vector< tools::Rectangle > RectangleVector; + +namespace vcl { + +class SAL_WARN_UNUSED VCL_DLLPUBLIC Region +{ +private: + friend class ::OutputDevice; + friend class ::vcl::Window; + friend class ::Bitmap; + + // possible contents + std::optional< basegfx::B2DPolyPolygon > + mpB2DPolyPolygon; + std::optional< tools::PolyPolygon > + mpPolyPolygon; + std::shared_ptr< RegionBand > + mpRegionBand; + + bool mbIsNull : 1; + + // helpers + SAL_DLLPRIVATE void ImplCreatePolyPolyRegion( const tools::PolyPolygon& rPolyPoly ); + SAL_DLLPRIVATE void ImplCreatePolyPolyRegion( const basegfx::B2DPolyPolygon& rPolyPoly ); + + SAL_DLLPRIVATE tools::PolyPolygon ImplCreatePolyPolygonFromRegionBand() const; + SAL_DLLPRIVATE basegfx::B2DPolyPolygon ImplCreateB2DPolyPolygonFromRegionBand() const; + +public: + + explicit Region(bool bIsNull = false); // default creates empty region, with true a null region is created + explicit Region(const tools::Rectangle& rRect); + explicit Region(const tools::Polygon& rPolygon); + explicit Region(const tools::PolyPolygon& rPolyPoly); + explicit Region(const basegfx::B2DPolyPolygon&); + Region(const vcl::Region& rRegion); + Region(vcl::Region&& rRegion) noexcept; + ~Region(); + + // direct access to contents + const std::optional<basegfx::B2DPolyPolygon>& getB2DPolyPolygon() const { return mpB2DPolyPolygon; } + const std::optional<tools::PolyPolygon>& getPolyPolygon() const { return mpPolyPolygon; } + const RegionBand* getRegionBand() const { return mpRegionBand.get(); } + + // access with converters, the asked data will be created from the most + // valuable data, buffered and returned + tools::PolyPolygon GetAsPolyPolygon() const; + basegfx::B2DPolyPolygon GetAsB2DPolyPolygon() const; + const RegionBand* GetAsRegionBand() const; + + // manipulators + void Move( tools::Long nHorzMove, tools::Long nVertMove ); + void Scale( double fScaleX, double fScaleY ); + void Union( const tools::Rectangle& rRegion ); + void Intersect( const tools::Rectangle& rRegion ); + void Exclude( const tools::Rectangle& rRegion ); + void XOr( const tools::Rectangle& rRegion ); + void Union( const vcl::Region& rRegion ); + void Intersect( const vcl::Region& rRegion ); + void Exclude( const vcl::Region& rRegion ); + bool XOr( const vcl::Region& rRegion ); + + bool IsEmpty() const; + bool IsNull() const { return mbIsNull;} + + void SetEmpty(); + void SetNull(); + + bool IsRectangle() const; + + tools::Rectangle GetBoundRect() const; + bool HasPolyPolygonOrB2DPolyPolygon() const { return (getB2DPolyPolygon() || getPolyPolygon()); } + void GetRegionRectangles(RectangleVector& rTarget) const; + + bool Contains( const Point& rPoint ) const; + bool Overlaps( const tools::Rectangle& rRect ) const; + + vcl::Region& operator=( const vcl::Region& rRegion ); + vcl::Region& operator=( vcl::Region&& rRegion ) noexcept; + vcl::Region& operator=( const tools::Rectangle& rRect ); + + bool operator==( const vcl::Region& rRegion ) const; + bool operator!=( const vcl::Region& rRegion ) const { return !(Region::operator==( rRegion )); } + + friend VCL_DLLPUBLIC SvStream& ReadRegion( SvStream& rIStm, vcl::Region& rRegion ); + friend VCL_DLLPUBLIC SvStream& WriteRegion( SvStream& rOStm, const vcl::Region& rRegion ); + + /* workaround: faster conversion for PolyPolygons + * if half of the Polygons contained in rPolyPoly are actually + * rectangles, then the returned vcl::Region will be constructed by + * XOr'ing the contained Polygons together; in the case of + * only Rectangles this can be up to eight times faster than + * Region( const tools::PolyPolygon& ). + * Caution: this is only useful if the vcl::Region is known to be + * changed to rectangles; e.g. if being set as clip region + */ + static vcl::Region GetRegionFromPolyPolygon( const tools::PolyPolygon& rPolyPoly ); +}; + +template< typename charT, typename traits > +inline std::basic_ostream<charT, traits> & operator <<( + std::basic_ostream<charT, traits> & stream, const Region& rRegion) +{ + if (rRegion.IsEmpty()) + return stream << "EMPTY"; + if (rRegion.getB2DPolyPolygon()) + return stream << "B2DPolyPolygon(" + << *rRegion.getB2DPolyPolygon() + << ")"; + if (rRegion.getPolyPolygon()) + return stream << "PolyPolygon(" + << *rRegion.getPolyPolygon() + << ")"; + if (rRegion.getRegionBand()) + { // inlined because RegionBand is private to vcl + stream << "RegionBand("; + RectangleVector rects; + rRegion.GetRegionRectangles(rects); + if (rects.empty()) + stream << "EMPTY"; + for (size_t i = 0; i < rects.size(); ++i) + stream << "[" << i << "] " << rects[i]; + stream << ")"; + } + return stream; +} + +} /* namespace vcl */ + +#endif // INCLUDED_VCL_REGION_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |