File indexing completed on 2024-12-22 04:09:07 

0001 /*
0002  *  SPDX-FileCopyrightText: Copyright (c) 2011 Dmitry Kazakov <dimula73@gmail.com>
0003  *
0004  *  SPDX-License-Identifier: GPL-2.0-or-later
0005  */
0006 
0007 #ifndef KOPOLYGONUTILS_H
0008 #define KOPOLYGONUTILS_H
0009 
0010 #include <QPolygon>
0011 
0012 /**
0013  * @brief The KoPolygonUtils class
0014  *
0015  * This class allows us to use the Polygon Concept from boost for QPolygons, which
0016  * has a very fast polygon offset algorithm, necessary for text-padding.
0017  *
0018  * For more info see:
0019  * https://www.boost.org/doc/libs/1_81_0/libs/polygon/doc/gtl_polygon_set_concept.htm
0020  */
0021 
0022 class KoPolygonUtils
0023 {
0024 public:
0025     /**
0026      * @brief offsetPolygon
0027      * This offsets a single polygon, using the winding/nonzero fill-rule to determine inside and outside.
0028      *
0029      * @param polygon
0030      * @param offset
0031      *  the offset.
0032      * @param rounded
0033      *  whether the edges are rounded.
0034      * @param circleSegments
0035      *  segments in a 360° circle.
0036      * @return the offset polygon.
0037      */
0038     static QPolygon offsetPolygon(const QPolygon &polygon, int offset, bool rounded = true, int circleSegments = 16);
0039 
0040     static QList<QPolygon> offsetPolygons (const QList<QPolygon> polygons, int offset, bool rounded = true, int circleSegments = 16);
0041 };
0042 
0043 #endif // KOPOLYGONUTILS_H