src/opengl/gl2paintengineex/qtriangulator_p.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 06 Jul 2010 15:10:48 +0300
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QTRIANGULATOR_P_H
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#define QTRIANGULATOR_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  It exists purely as an
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// implementation detail.  This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <QtCore/qvector.h>
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#include <QtGui/private/qvectorpath_p.h>
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QT_BEGIN_NAMESPACE
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#define Q_TRIANGULATE_END_OF_POLYGON quint32(-1)
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struct QTriangleSet
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{
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    inline QTriangleSet() { }
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    inline QTriangleSet(const QTriangleSet &other) : vertices(other.vertices), indices(other.indices) { }
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    QTriangleSet &operator = (const QTriangleSet &other) {vertices = other.vertices; indices = other.indices; return *this;}
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    // 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, ...
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    QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...]
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    QVector<quint32> indices; // [i[0], j[0], k[0], i[1], j[1], k[1], i[2], ...]
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};
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struct QPolylineSet
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{
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    inline QPolylineSet() { }
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    inline QPolylineSet(const QPolylineSet &other) : vertices(other.vertices), indices(other.indices) { }
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    QPolylineSet &operator = (const QPolylineSet &other) {vertices = other.vertices; indices = other.indices; return *this;}
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    QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...]
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    QVector<quint32> indices;
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};
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// The vertex coordinates of the returned triangle set will be rounded to a grid with a mesh size
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// of 1/32. The polygon is first transformed, then scaled by 32, the coordinates are rounded to
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// integers, the polygon is triangulated, and then scaled back by 1/32.
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// 'hint' should be a combination of QVectorPath::Hints.
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// 'lod' is the level of detail. Default is 1. Curves are split into more lines when 'lod' is higher.
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QTriangleSet qTriangulate(const qreal *polygon, int count, uint hint = QVectorPath::PolygonHint | QVectorPath::OddEvenFill, const QTransform &matrix = QTransform());
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QTriangleSet qTriangulate(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
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QTriangleSet qTriangulate(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
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QPolylineSet qPolyline(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
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QPolylineSet qPolyline(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1);
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QT_END_NAMESPACE
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#endif