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<h1 class="title">glextensions.h Example File</h1>
<span class="subtitle">graphicsview/boxes/glextensions.h</span>
<!-- $$$graphicsview/boxes/glextensions.h-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#ifndef GLEXTENSIONS_H</span>
<span class="preprocessor">#define GLEXTENSIONS_H</span>
<span class="preprocessor">#include <QtOpenGL></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_OS_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
{
bool resolve(<span class="keyword">const</span> <span class="type">QGLContext</span> <span class="operator">*</span>context);
bool fboSupported();
bool 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">&</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>
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<!-- @@@graphicsview/boxes/glextensions.h -->
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