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 examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
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** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50
51#ifndef GLWIDGET_H
52#define GLWIDGET_H
53
54#include <QOpenGLWidget>
55#include <QOpenGLFunctions>
56#include <QOpenGLBuffer>
57#include <QVector3D>
58#include <QMatrix4x4>
59#include <QElapsedTimer>
60#include <QVector>
61#include <QPushButton>
62
63class Bubble;
64class MainWindow;
65
66QT_FORWARD_DECLARE_CLASS(QOpenGLTexture)
67QT_FORWARD_DECLARE_CLASS(QOpenGLShader)
68QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram)
69
70class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
71{
72 Q_OBJECT
73public:
74 GLWidget(MainWindow *mw, bool button, const QColor &background);
75 ~GLWidget();
76
77public slots:
78 void setScaling(int scale);
79 void setLogo();
80 void setTexture();
81 void setShowBubbles(bool);
82 void setTransparent(bool transparent);
83
84private slots:
85 void handleButtonPress();
86
87protected:
88 void resizeGL(int w, int h) override;
89 void paintGL() override;
90 void initializeGL() override;
91
92private:
93 void paintTexturedCube();
94 void paintQtLogo();
95 void createGeometry();
96 void createBubbles(int number);
97 void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4);
98 void extrude(qreal x1, qreal y1, qreal x2, qreal y2);
99
100 MainWindow *m_mainWindow;
101 qreal m_fAngle = 0;
102 qreal m_fScale = 1;
103 bool m_showBubbles = true;
104 QVector<QVector3D> m_vertices;
105 QVector<QVector3D> m_normals;
106 bool = true;
107 QVector<Bubble *> m_bubbles;
108 int m_frames = 0;
109 QElapsedTimer m_time;
110 QOpenGLShader *m_vshader1 = nullptr;
111 QOpenGLShader *m_fshader1 = nullptr;
112 QOpenGLShader *m_vshader2 = nullptr;
113 QOpenGLShader *m_fshader2 = nullptr;
114 QOpenGLShaderProgram *m_program1 = nullptr;
115 QOpenGLShaderProgram *m_program2 = nullptr;
116 QOpenGLTexture *m_texture = nullptr;
117 QOpenGLBuffer m_vbo1;
118 QOpenGLBuffer m_vbo2;
119 int m_vertexAttr1 = 0;
120 int m_normalAttr1 = 0;
121 int m_matrixUniform1 = 0;
122 int m_vertexAttr2 = 0;
123 int m_normalAttr2 = 0;
124 int m_texCoordAttr2 = 0;
125 int m_matrixUniform2 = 0;
126 int m_textureUniform2 = 0;
127 bool m_transparent = false;
128 QPushButton *m_btn = nullptr;
129 bool m_hasButton;
130 QColor m_background;
131};
132
133#endif
134

source code of qtbase/examples/opengl/qopenglwidget/glwidget.h