summaryrefslogtreecommitdiffstats
path: root/src/datavisualization/engine/q3dwindow.cpp
blob: 16202179747a34c0ff79cac622dcf986ed497bf8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/

#include "q3dwindow.h"
#include "q3dwindow_p.h"
#include "abstract3dcontroller_p.h"
#include <QGuiApplication>

#include <QOpenGLContext>
#include <QOpenGLPaintDevice>
#include <QPainter>

#include <QDebug>

QT_DATAVISUALIZATION_BEGIN_NAMESPACE

/*!
 * \class Q3DWindow
 * \inmodule QtDataVisualization
 * \brief The Q3DWindow class provides a window and render loop.
 * \since 1.0.0
 *
 * This class creates a QWindow and provides render loop for visualization types inheriting it.
 * \warning This class is not intended to be used directly by developers.
 *
 * \sa Q3DBars, Q3DScatter, Q3DSurface, {Qt Data Visualization C++ Classes}
 */

/*!
 * Constructs Q3DWindow with \a parent. It creates a QWindow and an OpenGL context. It also sets
 * surface format and initializes OpenGL functions for use.
 */
Q3DWindow::Q3DWindow(QWindow *parent)
    : QWindow(parent),
      d_ptr(new Q3DWindowPrivate(this))
{
    setSurfaceType(QWindow::OpenGLSurface);
    QSurfaceFormat surfaceFormat;
    surfaceFormat.setDepthBufferSize(16);
#if !defined(QT_OPENGL_ES_2)
    surfaceFormat.setSamples(8);
    surfaceFormat.setRenderableType(QSurfaceFormat::OpenGL);
#else
    surfaceFormat.setRenderableType(QSurfaceFormat::OpenGLES);
#endif
    surfaceFormat.setSwapBehavior(QSurfaceFormat::DoubleBuffer);
    setFormat(surfaceFormat);

    create();

    d_ptr->m_context->setFormat(requestedFormat());
    d_ptr->m_context->create();
    d_ptr->m_context->makeCurrent(this);

    qDebug() << "initializeOpenGLFunctions()";
    initializeOpenGLFunctions();

    const GLubyte *version = glGetString(GL_VERSION);
    qDebug() << "OpenGL version:" << (const char *)version;
    version = glGetString(GL_SHADING_LANGUAGE_VERSION);
    qDebug() << "GLSL version:" << (const char *)version;
#if !defined(QT_OPENGL_ES_2)
    // If we have real OpenGL, GLSL version must be 1.2 or over. Quit if not.
    QStringList splitversionstr = QString::fromLatin1((const char *)version).split(QChar::fromLatin1(' '));
    if (splitversionstr[0].toFloat() < 1.2)
        qFatal("GLSL version must be 1.20 or higher. Try installing latest display drivers.");
#endif
    renderLater();
}

/*!
 * Destroys Q3DWindow.
 */
Q3DWindow::~Q3DWindow()
{
}

/*!
 * \internal
 */
void Q3DWindow::setVisualController(Abstract3DController *controller)
{
    d_ptr->m_visualController = controller;
}

/*!
 * \internal
 */
void Q3DWindow::handleDevicePixelRatioChange()
{
    if (QWindow::devicePixelRatio() == d_ptr->m_devicePixelRatio || !d_ptr->m_visualController)
        return;

    // Device pixel ratio changed, resize accordingly and inform the scene
    d_ptr->m_devicePixelRatio = QWindow::devicePixelRatio();
    d_ptr->m_visualController->updateDevicePixelRatio(d_ptr->m_devicePixelRatio);

}

/*!
 * \internal
 */
void Q3DWindow::render()
{
    handleDevicePixelRatioChange();
    d_ptr->m_visualController->synchDataToRenderer();
    d_ptr->m_visualController->render();
}

/*!
 * \internal
 */
void Q3DWindow::renderLater()
{
    if (!d_ptr->m_updatePending) {
        d_ptr->m_updatePending = true;
        QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
    }
}

/*!
 * \internal
 */
bool Q3DWindow::event(QEvent *event)
{
    switch (event->type()) {
    case QEvent::UpdateRequest:
        renderNow();
        return true;
    default:
        return QWindow::event(event);
    }
}

/*!
 * \internal
 */
void Q3DWindow::exposeEvent(QExposeEvent *event)
{
    Q_UNUSED(event);

    if (isExposed())
        renderNow();
}

/*!
 * \internal
 */
void Q3DWindow::renderNow()
{
    if (!isExposed())
        return;

    d_ptr->m_updatePending = false;

    d_ptr->m_context->makeCurrent(this);

    render();

    d_ptr->m_context->swapBuffers(this);
}

Q3DWindowPrivate::Q3DWindowPrivate(Q3DWindow *q)
    : q_ptr(q),
      m_updatePending(false),
      m_context(new QOpenGLContext(q)),
      m_visualController(0),
      m_devicePixelRatio(1.f)
{
}

Q3DWindowPrivate::~Q3DWindowPrivate()
{
}

QT_DATAVISUALIZATION_END_NAMESPACE