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Diffstat (limited to 'include/basegfx/range/b2drange.hxx')
| -rw-r--r-- | include/basegfx/range/b2drange.hxx | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/include/basegfx/range/b2drange.hxx b/include/basegfx/range/b2drange.hxx new file mode 100644 index 000000000..3fce8df1a --- /dev/null +++ b/include/basegfx/range/b2drange.hxx @@ -0,0 +1,175 @@ +/* -*- 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 . + */ + +#pragma once + +#include <ostream> +#include <vector> + +#include <basegfx/basegfxdllapi.h> +#include <basegfx/vector/b2dvector.hxx> +#include <basegfx/point/b2dpoint.hxx> +#include <basegfx/tuple/b2dtuple.hxx> +#include <basegfx/range/basicrange.hxx> +#include <basegfx/range/Range2D.hxx> + +namespace basegfx +{ + class B2IRange; + class B2DHomMatrix; + + /** A two-dimensional interval over doubles + + This is a set of real numbers, bounded by a lower and an upper + pair. All inbetween values are included in the set (see also + http://en.wikipedia.org/wiki/Interval_%28mathematics%29). + + The set is closed, i.e. the upper and the lower bound are + included (if you're used to the notation - we're talking about + [a,b] here, compared to half-open [a,b) or open intervals + (a,b)). + + That means, isInside(val) will return true also for values of + val=a or val=b. + + @see B1DRange + */ + class SAL_WARN_UNUSED B2DRange : public Range2D<double, DoubleTraits> + { + public: + B2DRange() + : Range2D() + {} + + /// Create degenerate interval consisting of a single point + explicit B2DRange(const Tuple2D<ValueType>& rTuple) + : Range2D(rTuple) + { + } + + /// Create proper interval between the two given points + B2DRange(const Tuple2D<ValueType>& rTuple1, + const Tuple2D<ValueType>& rTuple2) + : Range2D(rTuple1, rTuple2) + { + } + + B2DRange(ValueType x1, ValueType y1, ValueType x2, ValueType y2) + : Range2D(x1, y1, x2, y2) + {} + + BASEGFX_DLLPUBLIC explicit B2DRange(const B2IRange& rRange); + + /// get lower bound of the set. returns arbitrary values for empty sets. + B2DPoint getMinimum() const + { + return B2DPoint( + maRangeX.getMinimum(), + maRangeY.getMinimum() + ); + } + + /// get upper bound of the set. returns arbitrary values for empty sets. + B2DPoint getMaximum() const + { + return B2DPoint( + maRangeX.getMaximum(), + maRangeY.getMaximum() + ); + } + + /// return difference between upper and lower point. returns (0,0) for empty sets. + B2DVector getRange() const + { + return B2DVector( + maRangeX.getRange(), + maRangeY.getRange() + ); + } + + /// return center point of set. returns (0,0) for empty sets. + B2DPoint getCenter() const + { + return B2DPoint( + maRangeX.getCenter(), + maRangeY.getCenter() + ); + } + + /** Transform Range by given transformation matrix. */ + BASEGFX_DLLPUBLIC void transform(const B2DHomMatrix& rMatrix); + + /** Transform Range by given transformation matrix. + + This operation transforms the Range by transforming all four possible + extrema points (corners) of the given range and building a new one. + This means that the range will grow evtl. when a shear and/or rotation + is part of the transformation. + */ + BASEGFX_DLLPUBLIC B2DRange& operator*=( const ::basegfx::B2DHomMatrix& rMat ); + + /** Get a range filled with (0.0, 0.0, 1.0, 1.0) */ + static const B2DRange& getUnitB2DRange(); + }; + + /** Transform B2DRange by given transformation matrix (see operator*=()) + */ + B2DRange operator*( const B2DHomMatrix& rMat, const B2DRange& rB2DRange ); + + /** Round double to nearest integer for 2D range + + @return the nearest integer for this range + */ + BASEGFX_DLLPUBLIC B2IRange fround(const B2DRange& rRange); + + /** Compute the set difference of the two given ranges + + This method calculates the symmetric difference (aka XOR) + between the two given ranges, and returning the resulting + ranges. Thus, the result will contain all areas where one, but + not both ranges lie. + + @param o_rResult + Result vector. The up to four difference ranges are returned + within this vector + + @param rFirst + The first range + + @param rSecond + The second range + + @return the input vector + */ + BASEGFX_DLLPUBLIC std::vector<B2DRange>& computeSetDifference( + std::vector<B2DRange>& o_rResult, + const B2DRange& rFirst, + const B2DRange& rSecond); + + /** Write to char stream */ + template<typename charT, typename traits> + inline std::basic_ostream<charT, traits>& operator<<( + std::basic_ostream<charT, traits>& stream, const B2DRange& range) + { + return stream << range.getWidth() << "x" << range.getHeight() << "@" << range.getMinimum(); + } + +} // end of namespace basegfx + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |