/* -*- 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 #include #include #include #include namespace basegfx::utils { /** Create line start/end geometry element, mostly arrows and things like that. @param rCandidate The polygon which needs to get that line ends and needs to have two points at least. @param rArrow The line start/end geometry. It is assumed that the tip is pointing upwards. Result will be rotated and scaled to fit. @param bStart describes if creation is for start or end of candidate. @param fWidth defines the size of the element, it's describing the target width in X of the arrow. @param fDockingPosition needs to be in [0.0 ..1.0] range, where 0.0 means that the tip of the arrow will be aligned with the polygon start, 1.0 means the bottom. The default of 0.5 describes a centered arrow. @param pConsumedLength Using this parameter it is possible to get back how much from the candidate geometry is overlapped by the created element (consumed). @param fCandidateLength This should contain the length of rCandidate to allow work without again calculating the length (which may be expensive with beziers). If 0.0 is given, the length is calculated on demand. @param fShift When it is necessary to count with the thickness of the line, it makes sense to move the start position slightly - so define the shift. @return The Line start and end polygon, correctly rotated and scaled */ BASEGFX_DLLPUBLIC B2DPolyPolygon createAreaGeometryForLineStartEnd( const B2DPolygon& rCandidate, const B2DPolyPolygon& rArrow, bool bStart, double fWidth, double fCandidateLength, // 0.0 -> calculate self double fDockingPosition, // 0->top, 1->bottom double* pConsumedLength = nullptr, double fShift = 0.0); /** create filled polygon geometry for lines with a line width This method will create bezier based, fillable polygons which will resample the curve if it was extended for the given half line width. It will remove extrema positions from contained bezier segments and get as close as possible and defined by the given parameters to the ideal result. It will check edges for trivial bezier to avoid unnecessary bezier polygons. Care is taken to produce the in-between polygon points (the ones original on the source polygon) since it has showed that without those, the raster converters leave non-filled gaps. @param rCandidate The source polygon defining the hairline polygon path @param fHalfLineWidth The width of the line to one side @param eJoin The LineJoin if the edges meeting in a point do not have a C1 or C2 continuity @param eCap The kind of cap, which is added to the line. @param fMaxAllowedAngle Allows to hand over the maximum allowed angle between an edge and it's control vectors. The smaller, the more subdivisions will be needed to create the filled geometry. Allowed range is cropped to [M_PI_2 .. 0.01 * M_PI_2]. @param fMaxPartOfEdge Allows to influence from with relative length of a control vector compared to its edge a split is forced. The smaller, the more subdivisions will be needed to create the filled geometry. Allowed range is cropped to [1.0 .. 0.01] @param fMiterMinimumAngle The minimum wanted angle between two edges when edge rounding is using miter. When an edge is smaller than this (tighter) the usual fallback to bevel is used. Allowed range is cropped to [M_PI .. 0.01 * M_PI]. Commit 51b5b93092d6231615de470c62494c24e54828a1 needs revert, we need the triangulation for X11 fat line drawing @param pTriangles If given, the method will additionally add the created geometry as B2DTriangle's @return The tools::PolyPolygon containing the geometry of the extended line by it's line width. Contains bezier segments and edge roundings as needed and defined. */ BASEGFX_DLLPUBLIC B2DPolyPolygon createAreaGeometry( const B2DPolygon& rCandidate, double fHalfLineWidth, B2DLineJoin eJoin, css::drawing::LineCap eCap, double fMaxAllowedAngle = basegfx::deg2rad(12.5), double fMaxPartOfEdge = 0.4, double fMiterMinimumAngle = basegfx::deg2rad(15.0)); } // end of namespace basegfx::utils /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ stro/lhm/libreoffice-5-2+backports LibreOffice 核心代码仓库文档基金会
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