1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QTRIANGULATOR_P_H 41 #define QTRIANGULATOR_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtGui/private/qtguiglobal_p.h> 55 #include <QtCore/qvector.h> 56 #include <QtGui/private/qvectorpath_p.h> 57 58 QT_BEGIN_NAMESPACE 59 60 class QVertexIndexVector 61 { 62 public: 63 enum Type { 64 UnsignedInt, 65 UnsignedShort 66 }; 67 type()68 inline Type type() const { return t; } 69 setDataUint(const QVector<quint32> & data)70 inline void setDataUint(const QVector<quint32> &data) 71 { 72 t = UnsignedInt; 73 indices32 = data; 74 } 75 setDataUshort(const QVector<quint16> & data)76 inline void setDataUshort(const QVector<quint16> &data) 77 { 78 t = UnsignedShort; 79 indices16 = data; 80 } 81 data()82 inline const void* data() const 83 { 84 if (t == UnsignedInt) 85 return indices32.data(); 86 return indices16.data(); 87 } 88 size()89 inline int size() const 90 { 91 if (t == UnsignedInt) 92 return indices32.size(); 93 return indices16.size(); 94 } 95 96 private: 97 98 Type t; 99 QVector<quint32> indices32; 100 QVector<quint16> indices16; 101 }; 102 103 struct QTriangleSet 104 { 105 // The vertices of a triangle are given by: (x[i[n]], y[i[n]]), (x[j[n]], y[j[n]]), (x[k[n]], y[k[n]]), n = 0, 1, ... 106 QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...] 107 QVertexIndexVector indices; // [i[0], j[0], k[0], i[1], j[1], k[1], i[2], ...] 108 }; 109 110 struct QPolylineSet 111 { 112 QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...] 113 QVertexIndexVector indices; // End of polyline is marked with -1. 114 }; 115 116 // The vertex coordinates of the returned triangle set will be rounded to a grid with a mesh size 117 // of 1/32. The polygon is first transformed, then scaled by 32, the coordinates are rounded to 118 // integers, the polygon is triangulated, and then scaled back by 1/32. 119 // 'hint' should be a combination of QVectorPath::Hints. 120 // 'lod' is the level of detail. Default is 1. Curves are split into more lines when 'lod' is higher. 121 QTriangleSet Q_GUI_EXPORT qTriangulate(const qreal *polygon, int count, 122 uint hint = QVectorPath::PolygonHint | QVectorPath::OddEvenFill, 123 const QTransform &matrix = QTransform(), 124 bool allowUintIndices = true); 125 QTriangleSet Q_GUI_EXPORT qTriangulate(const QVectorPath &path, const QTransform &matrix = QTransform(), 126 qreal lod = 1, bool allowUintIndices = true); 127 QTriangleSet Q_GUI_EXPORT qTriangulate(const QPainterPath &path, const QTransform &matrix = QTransform(), 128 qreal lod = 1, bool allowUintIndices = true); 129 QPolylineSet qPolyline(const QVectorPath &path, const QTransform &matrix = QTransform(), 130 qreal lod = 1, bool allowUintIndices = true); 131 QPolylineSet Q_GUI_EXPORT qPolyline(const QPainterPath &path, const QTransform &matrix = QTransform(), 132 qreal lod = 1, bool allowUintIndices = true); 133 134 QT_END_NAMESPACE 135 136 #endif 137