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Diffstat (limited to 'src/gui/opengl/qtriangulator_p.h')
-rw-r--r-- | src/gui/opengl/qtriangulator_p.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/gui/opengl/qtriangulator_p.h b/src/gui/opengl/qtriangulator_p.h new file mode 100644 index 0000000000..192bd9cb19 --- /dev/null +++ b/src/gui/opengl/qtriangulator_p.h @@ -0,0 +1,148 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QTRIANGULATOR_P_H +#define QTRIANGULATOR_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtCore/qvector.h> +#include <QtGui/private/qvectorpath_p.h> + +QT_BEGIN_NAMESPACE + +class Q_GUI_EXPORT QVertexIndexVector +{ +public: + enum Type { + UnsignedInt, + UnsignedShort + }; + + inline Type type() const { return t; } + + inline void setDataUint(const QVector<quint32> &data) + { + t = UnsignedInt; + indices32 = data; + } + + inline void setDataUshort(const QVector<quint16> &data) + { + t = UnsignedShort; + indices16 = data; + } + + inline const void* data() const + { + if (t == UnsignedInt) + return indices32.data(); + return indices16.data(); + } + + inline int size() const + { + if (t == UnsignedInt) + return indices32.size(); + return indices16.size(); + } + + inline QVertexIndexVector &operator = (const QVertexIndexVector &other) + { + if (t == UnsignedInt) + indices32 = other.indices32; + else + indices16 = other.indices16; + + return *this; + } + +private: + + Type t; + QVector<quint32> indices32; + QVector<quint16> indices16; +}; + +struct Q_GUI_EXPORT QTriangleSet +{ + inline QTriangleSet() { } + inline QTriangleSet(const QTriangleSet &other) : vertices(other.vertices), indices(other.indices) { } + QTriangleSet &operator = (const QTriangleSet &other) {vertices = other.vertices; indices = other.indices; return *this;} + + // 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, ... + QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...] + QVertexIndexVector indices; // [i[0], j[0], k[0], i[1], j[1], k[1], i[2], ...] +}; + +struct Q_GUI_EXPORT QPolylineSet +{ + inline QPolylineSet() { } + inline QPolylineSet(const QPolylineSet &other) : vertices(other.vertices), indices(other.indices) { } + QPolylineSet &operator = (const QPolylineSet &other) {vertices = other.vertices; indices = other.indices; return *this;} + + QVector<qreal> vertices; // [x[0], y[0], x[1], y[1], x[2], ...] + QVertexIndexVector indices; // End of polyline is marked with -1. +}; + +// The vertex coordinates of the returned triangle set will be rounded to a grid with a mesh size +// of 1/32. The polygon is first transformed, then scaled by 32, the coordinates are rounded to +// integers, the polygon is triangulated, and then scaled back by 1/32. +// 'hint' should be a combination of QVectorPath::Hints. +// 'lod' is the level of detail. Default is 1. Curves are split into more lines when 'lod' is higher. +QTriangleSet qTriangulate(const qreal *polygon, int count, uint hint = QVectorPath::PolygonHint | QVectorPath::OddEvenFill, const QTransform &matrix = QTransform()); +QTriangleSet qTriangulate(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1); +QTriangleSet Q_GUI_EXPORT qTriangulate(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1); +QPolylineSet qPolyline(const QVectorPath &path, const QTransform &matrix = QTransform(), qreal lod = 1); +QPolylineSet Q_GUI_EXPORT qPolyline(const QPainterPath &path, const QTransform &matrix = QTransform(), qreal lod = 1); + +QT_END_NAMESPACE + +#endif |