1/****************************************************************************
2**
3** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sean Harmer <sean.harmer@kdab.com>
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtGui module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
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16**
17** GNU Lesser General Public License Usage
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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.
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25** GNU General Public License Usage
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27** General Public License version 2.0 or (at your option) the GNU General
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38****************************************************************************/
39
40#ifndef QOPENGLVERTEXARRAYOBJECT_P_H
41#define QOPENGLVERTEXARRAYOBJECT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of the Qt OpenGL classes. This header file may change from
49// version to version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/qglobal.h>
55
56#ifndef QT_NO_OPENGL
57
58#include <QtGui/qopengl.h>
59
60QT_BEGIN_NAMESPACE
61
62class QOpenGLVertexArrayObjectHelper;
63class QOpenGLContext;
64
65void Q_GUI_EXPORT qtInitializeVertexArrayObjectHelper(QOpenGLVertexArrayObjectHelper *helper, QOpenGLContext *context);
66
67class QOpenGLVertexArrayObjectHelper
68{
69 Q_DISABLE_COPY(QOpenGLVertexArrayObjectHelper)
70
71public:
72 explicit inline QOpenGLVertexArrayObjectHelper(QOpenGLContext *context)
73 : GenVertexArrays(nullptr)
74 , DeleteVertexArrays(nullptr)
75 , BindVertexArray(nullptr)
76 , IsVertexArray(nullptr)
77 {
78 qtInitializeVertexArrayObjectHelper(this, context);
79 }
80
81 inline bool isValid() const
82 {
83 return GenVertexArrays && DeleteVertexArrays && BindVertexArray && IsVertexArray;
84 }
85
86 inline void glGenVertexArrays(GLsizei n, GLuint *arrays) const
87 {
88 GenVertexArrays(n, arrays);
89 }
90
91 inline void glDeleteVertexArrays(GLsizei n, const GLuint *arrays) const
92 {
93 DeleteVertexArrays(n, arrays);
94 }
95
96 inline void glBindVertexArray(GLuint array) const
97 {
98 BindVertexArray(array);
99 }
100
101 inline GLboolean glIsVertexArray(GLuint array) const
102 {
103 return IsVertexArray(array);
104 }
105
106private:
107 friend void Q_GUI_EXPORT qtInitializeVertexArrayObjectHelper(QOpenGLVertexArrayObjectHelper *helper, QOpenGLContext *context);
108
109 // Function signatures are equivalent between desktop core, ARB, APPLE, ES 3 and ES 2 extensions
110 typedef void (QOPENGLF_APIENTRYP qt_GenVertexArrays_t)(GLsizei n, GLuint *arrays);
111 typedef void (QOPENGLF_APIENTRYP qt_DeleteVertexArrays_t)(GLsizei n, const GLuint *arrays);
112 typedef void (QOPENGLF_APIENTRYP qt_BindVertexArray_t)(GLuint array);
113 typedef GLboolean (QOPENGLF_APIENTRYP qt_IsVertexArray_t)(GLuint array);
114
115 qt_GenVertexArrays_t GenVertexArrays;
116 qt_DeleteVertexArrays_t DeleteVertexArrays;
117 qt_BindVertexArray_t BindVertexArray;
118 qt_IsVertexArray_t IsVertexArray;
119};
120
121QT_END_NAMESPACE
122
123#endif // QT_NO_OPENGL
124
125#endif // QOPENGLVERTEXARRAYOBJECT_P_H
126