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<h1 class="title">glextensions.h Example File</h1>
<span class="small-subtitle">demos/boxes/glextensions.h</span>
<!-- $$$demos/boxes/glextensions.h-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#ifndef GLEXTENSIONS_H</span>
<span class="preprocessor">#define GLEXTENSIONS_H</span>
<span class="preprocessor">#include &lt;QtOpenGL&gt;</span>
<span class="comment">/*
Functions resolved:
glGenFramebuffersEXT
glGenRenderbuffersEXT
glBindRenderbufferEXT
glRenderbufferStorageEXT
glDeleteFramebuffersEXT
glDeleteRenderbuffersEXT
glBindFramebufferEXT
glFramebufferTexture2DEXT
glFramebufferRenderbufferEXT
glCheckFramebufferStatusEXT
glActiveTexture
glTexImage3D
glGenBuffers
glBindBuffer
glBufferData
glDeleteBuffers
glMapBuffer
glUnmapBuffer
*/</span>
<span class="preprocessor">#ifndef Q_WS_MAC</span>
<span class="preprocessor"># ifndef APIENTRYP</span>
<span class="preprocessor"># ifdef APIENTRY</span>
<span class="preprocessor"># define APIENTRYP APIENTRY *</span>
<span class="preprocessor"># else</span>
<span class="preprocessor"># define APIENTRY</span>
<span class="preprocessor"># define APIENTRYP *</span>
<span class="preprocessor"># endif</span>
<span class="preprocessor"># endif</span>
<span class="preprocessor">#else</span>
<span class="preprocessor"># define APIENTRY</span>
<span class="preprocessor"># define APIENTRYP *</span>
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifndef GL_VERSION_1_2</span>
<span class="preprocessor">#define GL_TEXTURE_3D 0x806F</span>
<span class="preprocessor">#define GL_TEXTURE_WRAP_R 0x8072</span>
<span class="preprocessor">#define GL_CLAMP_TO_EDGE 0x812F</span>
<span class="preprocessor">#define GL_BGRA 0x80E1</span>
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifndef GL_VERSION_1_3</span>
<span class="preprocessor">#define GL_TEXTURE0 0x84C0</span>
<span class="preprocessor">#define GL_TEXTURE1 0x84C1</span>
<span class="preprocessor">#define GL_TEXTURE2 0x84C2</span>
<span class="preprocessor">#define GL_TEXTURE_CUBE_MAP 0x8513</span>
<span class="preprocessor">#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515</span>
<span class="comment">//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516</span>
<span class="comment">//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517</span>
<span class="comment">//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518</span>
<span class="comment">//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519</span>
<span class="comment">//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A</span>
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifndef GL_ARB_vertex_buffer_object</span>
<span class="keyword">typedef</span> ptrdiff_t GLsizeiptrARB;
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifndef GL_VERSION_1_5</span>
<span class="preprocessor">#define GL_ARRAY_BUFFER 0x8892</span>
<span class="preprocessor">#define GL_ELEMENT_ARRAY_BUFFER 0x8893</span>
<span class="preprocessor">#define GL_READ_WRITE 0x88BA</span>
<span class="preprocessor">#define GL_STATIC_DRAW 0x88E4</span>
<span class="preprocessor">#endif</span>
<span class="preprocessor">#ifndef GL_EXT_framebuffer_object</span>
<span class="preprocessor">#define GL_RENDERBUFFER_EXT 0x8D41</span>
<span class="preprocessor">#define GL_FRAMEBUFFER_EXT 0x8D40</span>
<span class="preprocessor">#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5</span>
<span class="preprocessor">#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0</span>
<span class="preprocessor">#define GL_DEPTH_ATTACHMENT_EXT 0x8D00</span>
<span class="preprocessor">#endif</span>
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glGenFramebuffersEXT) (GLsizei<span class="operator">,</span> GLuint <span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glGenRenderbuffersEXT) (GLsizei<span class="operator">,</span> GLuint <span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glBindRenderbufferEXT) (GLenum<span class="operator">,</span> GLuint);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glRenderbufferStorageEXT) (GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> GLsizei<span class="operator">,</span> GLsizei);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glDeleteFramebuffersEXT) (GLsizei<span class="operator">,</span> <span class="keyword">const</span> GLuint<span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glDeleteRenderbuffersEXT) (GLsizei<span class="operator">,</span> <span class="keyword">const</span> GLuint<span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glBindFramebufferEXT) (GLenum<span class="operator">,</span> GLuint);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glFramebufferTexture2DEXT) (GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> GLuint<span class="operator">,</span> GLint);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glFramebufferRenderbufferEXT) (GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> GLuint);
<span class="keyword">typedef</span> GLenum (APIENTRY <span class="operator">*</span>_glCheckFramebufferStatusEXT) (GLenum);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glActiveTexture) (GLenum);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glTexImage3D) (GLenum<span class="operator">,</span> GLint<span class="operator">,</span> GLenum<span class="operator">,</span> GLsizei<span class="operator">,</span> GLsizei<span class="operator">,</span> GLsizei<span class="operator">,</span> GLint<span class="operator">,</span> GLenum<span class="operator">,</span> GLenum<span class="operator">,</span> <span class="keyword">const</span> GLvoid <span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glGenBuffers) (GLsizei<span class="operator">,</span> GLuint <span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glBindBuffer) (GLenum<span class="operator">,</span> GLuint);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glBufferData) (GLenum<span class="operator">,</span> GLsizeiptrARB<span class="operator">,</span> <span class="keyword">const</span> GLvoid <span class="operator">*</span><span class="operator">,</span> GLenum);
<span class="keyword">typedef</span> <span class="type">void</span> (APIENTRY <span class="operator">*</span>_glDeleteBuffers) (GLsizei<span class="operator">,</span> <span class="keyword">const</span> GLuint <span class="operator">*</span>);
<span class="keyword">typedef</span> <span class="type">void</span> <span class="operator">*</span>(APIENTRY <span class="operator">*</span>_glMapBuffer) (GLenum<span class="operator">,</span> GLenum);
<span class="keyword">typedef</span> GLboolean (APIENTRY <span class="operator">*</span>_glUnmapBuffer) (GLenum);
<span class="keyword">struct</span> GLExtensionFunctions
{
<span class="type">bool</span> resolve(<span class="keyword">const</span> <span class="type"><a href="qglcontext.html">QGLContext</a></span> <span class="operator">*</span>context);
<span class="type">bool</span> fboSupported();
<span class="type">bool</span> openGL15Supported(); <span class="comment">// the rest: multi-texture, 3D-texture, vertex buffer objects</span>
_glGenFramebuffersEXT GenFramebuffersEXT;
_glGenRenderbuffersEXT GenRenderbuffersEXT;
_glBindRenderbufferEXT BindRenderbufferEXT;
_glRenderbufferStorageEXT RenderbufferStorageEXT;
_glDeleteFramebuffersEXT DeleteFramebuffersEXT;
_glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;
_glBindFramebufferEXT BindFramebufferEXT;
_glFramebufferTexture2DEXT FramebufferTexture2DEXT;
_glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;
_glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;
_glActiveTexture ActiveTexture;
_glTexImage3D TexImage3D;
_glGenBuffers GenBuffers;
_glBindBuffer BindBuffer;
_glBufferData BufferData;
_glDeleteBuffers DeleteBuffers;
_glMapBuffer MapBuffer;
_glUnmapBuffer UnmapBuffer;
};
<span class="keyword">inline</span> GLExtensionFunctions <span class="operator">&amp;</span>getGLExtensionFunctions()
{
<span class="keyword">static</span> GLExtensionFunctions funcs;
<span class="keyword">return</span> funcs;
}
<span class="preprocessor">#define glGenFramebuffersEXT getGLExtensionFunctions().GenFramebuffersEXT</span>
<span class="preprocessor">#define glGenRenderbuffersEXT getGLExtensionFunctions().GenRenderbuffersEXT</span>
<span class="preprocessor">#define glBindRenderbufferEXT getGLExtensionFunctions().BindRenderbufferEXT</span>
<span class="preprocessor">#define glRenderbufferStorageEXT getGLExtensionFunctions().RenderbufferStorageEXT</span>
<span class="preprocessor">#define glDeleteFramebuffersEXT getGLExtensionFunctions().DeleteFramebuffersEXT</span>
<span class="preprocessor">#define glDeleteRenderbuffersEXT getGLExtensionFunctions().DeleteRenderbuffersEXT</span>
<span class="preprocessor">#define glBindFramebufferEXT getGLExtensionFunctions().BindFramebufferEXT</span>
<span class="preprocessor">#define glFramebufferTexture2DEXT getGLExtensionFunctions().FramebufferTexture2DEXT</span>
<span class="preprocessor">#define glFramebufferRenderbufferEXT getGLExtensionFunctions().FramebufferRenderbufferEXT</span>
<span class="preprocessor">#define glCheckFramebufferStatusEXT getGLExtensionFunctions().CheckFramebufferStatusEXT</span>
<span class="preprocessor">#define glActiveTexture getGLExtensionFunctions().ActiveTexture</span>
<span class="preprocessor">#define glTexImage3D getGLExtensionFunctions().TexImage3D</span>
<span class="preprocessor">#define glGenBuffers getGLExtensionFunctions().GenBuffers</span>
<span class="preprocessor">#define glBindBuffer getGLExtensionFunctions().BindBuffer</span>
<span class="preprocessor">#define glBufferData getGLExtensionFunctions().BufferData</span>
<span class="preprocessor">#define glDeleteBuffers getGLExtensionFunctions().DeleteBuffers</span>
<span class="preprocessor">#define glMapBuffer getGLExtensionFunctions().MapBuffer</span>
<span class="preprocessor">#define glUnmapBuffer getGLExtensionFunctions().UnmapBuffer</span>
<span class="preprocessor">#endif</span></pre>
</div>
<!-- @@@demos/boxes/glextensions.h -->
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