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 Qt Charts module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL$
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 General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 or (at your option) any later version
20** approved by the KDE Free Qt Foundation. The licenses are as published by
21** the Free Software Foundation and appearing in the file LICENSE.GPL3
22** included in the packaging of this file. Please review the following
23** information to ensure the GNU General Public License requirements will
24** be met: https://www.gnu.org/licenses/gpl-3.0.html.
25**
26** $QT_END_LICENSE$
27**
28****************************************************************************/
29
30// W A R N I N G
31// -------------
32//
33// This file is not part of the Qt Chart API. It exists purely as an
34// implementation detail. This header file may change from version to
35// version without notice, or even be removed.
36//
37// We mean it.
38
39#ifndef DECLARATIVEOPENGLRENDERNODE_P_H
40#define DECLARATIVEOPENGLRENDERNODE_P_H
41
42#include <private/declarativeabstractrendernode_p.h>
43
44#include <QtCharts/QChartGlobal>
45#include <private/glxyseriesdata_p.h>
46#include <QtQuick/QSGImageNode>
47#include <QtQuick/QQuickWindow>
48#include <QtGui/QOpenGLShaderProgram>
49#include <QtGui/QOpenGLVertexArrayObject>
50#include <QtGui/QOpenGLFunctions>
51#include <QtGui/QOpenGLFramebufferObject>
52#include <QtGui/QOpenGLBuffer>
53
54QT_CHARTS_BEGIN_NAMESPACE
55
56class DeclarativeOpenGLRenderNode : public QObject, public DeclarativeAbstractRenderNode, QOpenGLFunctions
57{
58 Q_OBJECT
59public:
60 DeclarativeOpenGLRenderNode(QQuickWindow *window);
61 ~DeclarativeOpenGLRenderNode();
62
63 void initGL();
64 QSize textureSize() const override { return m_textureSize; }
65 void setTextureSize(const QSize &size) override;
66
67 void setSeriesData(bool mapDirty, const GLXYDataMap &dataMap) override;
68 void setRect(const QRectF &rect) override;
69 void setAntialiasing(bool enable) override;
70 void addMouseEvents(const QVector<QMouseEvent *> &events) override;
71 void takeMouseEventResponses(QVector<MouseEventResponse> &responses) override;
72
73public Q_SLOTS:
74 void render();
75
76private:
77 void renderGL(bool selection);
78 void renderSelection();
79 void renderVisual();
80 void recreateFBO();
81 void cleanXYSeriesResources(const QXYSeries *series);
82 void handleMouseEvents();
83 const QXYSeries *findSeriesAtEvent(QMouseEvent *event);
84
85 QSGTexture *m_texture;
86 QSGImageNode *m_imageNode;
87 QQuickWindow *m_window;
88 QQuickWindow::CreateTextureOptions m_textureOptions;
89 QSize m_textureSize;
90 bool m_recreateFbo;
91 GLXYDataMap m_xyDataMap;
92 QOpenGLFramebufferObject *m_fbo;
93 QOpenGLFramebufferObject *m_resolvedFbo;
94 QOpenGLFramebufferObject *m_selectionFbo;
95 QOpenGLShaderProgram *m_program;
96 int m_shaderAttribLoc;
97 int m_colorUniformLoc;
98 int m_minUniformLoc;
99 int m_deltaUniformLoc;
100 int m_pointSizeUniformLoc;
101 int m_matrixUniformLoc;
102 QOpenGLVertexArrayObject m_vao;
103 QHash<const QAbstractSeries *, QOpenGLBuffer *> m_seriesBufferMap;
104 bool m_renderNeeded;
105 QRectF m_rect;
106 bool m_antialiasing;
107 QVector<QMouseEvent *> m_mouseEvents;
108 QVector<MouseEventResponse> m_mouseEventResponses;
109 bool m_selectionRenderNeeded;
110 QVector<const QXYSeries *> m_selectionVector;
111 QPoint m_mousePressPos;
112 bool m_mousePressed;
113 const QXYSeries *m_lastPressSeries;
114 const QXYSeries *m_lastHoverSeries;
115};
116
117QT_CHARTS_END_NAMESPACE
118
119#endif // DECLARATIVEOPENGLRENDERNODE_P_H
120

source code of qtcharts/src/chartsqml2/declarativeopenglrendernode_p.h