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 QtOpenGL module of the Qt Toolkit.
7**
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17** GNU Lesser General Public License Usage
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19** General Public License version 3 as published by the Free Software
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21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
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25** GNU General Public License Usage
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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 <QtOpenGL/qtopenglglobal.h>
55
56#include <QtGui/qopengl.h>
57
58QT_BEGIN_NAMESPACE
59
60class QOpenGLContext;
61
62class QOpenGLVertexArrayObjectHelper
63{
64 Q_DISABLE_COPY(QOpenGLVertexArrayObjectHelper)
65
66private:
67 explicit inline QOpenGLVertexArrayObjectHelper(QOpenGLContext *context)
68 : GenVertexArrays(nullptr)
69 , DeleteVertexArrays(nullptr)
70 , BindVertexArray(nullptr)
71 , IsVertexArray(nullptr)
72 {
73 initializeFromContext(context);
74 }
75
76 void Q_OPENGL_EXPORT initializeFromContext(QOpenGLContext *context);
77
78public:
79 static Q_OPENGL_EXPORT QOpenGLVertexArrayObjectHelper *vertexArrayObjectHelperForContext(QOpenGLContext *context);
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
106 // Function signatures are equivalent between desktop core, ARB, APPLE, ES 3 and ES 2 extensions
107 typedef void (QOPENGLF_APIENTRYP qt_GenVertexArrays_t)(GLsizei n, GLuint *arrays);
108 typedef void (QOPENGLF_APIENTRYP qt_DeleteVertexArrays_t)(GLsizei n, const GLuint *arrays);
109 typedef void (QOPENGLF_APIENTRYP qt_BindVertexArray_t)(GLuint array);
110 typedef GLboolean (QOPENGLF_APIENTRYP qt_IsVertexArray_t)(GLuint array);
111
112 qt_GenVertexArrays_t GenVertexArrays;
113 qt_DeleteVertexArrays_t DeleteVertexArrays;
114 qt_BindVertexArray_t BindVertexArray;
115 qt_IsVertexArray_t IsVertexArray;
116};
117
118QT_END_NAMESPACE
119
120#endif // QOPENGLVERTEXARRAYOBJECT_P_H
121