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 QtWidgets 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 QOPENGLWIDGET_H 41 #define QOPENGLWIDGET_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 45 #ifndef QT_NO_OPENGL 46 47 #include <QtWidgets/QWidget> 48 #include <QtGui/QSurfaceFormat> 49 #include <QtGui/qopengl.h> 50 51 QT_BEGIN_NAMESPACE 52 53 class QOpenGLWidgetPrivate; 54 55 class Q_WIDGETS_EXPORT QOpenGLWidget : public QWidget 56 { 57 Q_OBJECT 58 Q_DECLARE_PRIVATE(QOpenGLWidget) 59 60 public: 61 enum UpdateBehavior { 62 NoPartialUpdate, 63 PartialUpdate 64 }; 65 66 explicit QOpenGLWidget(QWidget* parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()); 67 ~QOpenGLWidget(); 68 69 void setUpdateBehavior(UpdateBehavior updateBehavior); 70 UpdateBehavior updateBehavior() const; 71 72 void setFormat(const QSurfaceFormat &format); 73 QSurfaceFormat format() const; 74 75 GLenum textureFormat() const; 76 void setTextureFormat(GLenum texFormat); 77 78 bool isValid() const; 79 80 void makeCurrent(); 81 void doneCurrent(); 82 83 QOpenGLContext *context() const; 84 GLuint defaultFramebufferObject() const; 85 86 QImage grabFramebuffer(); 87 88 Q_SIGNALS: 89 void aboutToCompose(); 90 void frameSwapped(); 91 void aboutToResize(); 92 void resized(); 93 94 protected: 95 virtual void initializeGL(); 96 virtual void resizeGL(int w, int h); 97 virtual void paintGL(); 98 99 void paintEvent(QPaintEvent *e) override; 100 void resizeEvent(QResizeEvent *e) override; 101 bool event(QEvent *e) override; 102 103 int metric(QPaintDevice::PaintDeviceMetric metric) const override; 104 QPaintDevice *redirected(QPoint *p) const override; 105 QPaintEngine *paintEngine() const override; 106 107 private: 108 Q_DISABLE_COPY(QOpenGLWidget) 109 }; 110 111 QT_END_NAMESPACE 112 113 #endif // QT_NO_OPENGL 114 115 #endif // QOPENGLWIDGET_H 116