ionSupported</a> returns <code>GL_TRUE</code>, otherwise it returns <code>GL_FALSE</code>.</p>
<h3><a class="anchor" id="context_glext_proc"></a>
Fetching function pointers</h3>
<p>Many extensions, though not all, require the use of new OpenGL functions. These functions often do not have entry points in the client API libraries of your operating system, making it necessary to fetch them at run time. You can retrieve pointers to these functions with <a class="el" href="group__context.html#ga35f1837e6f6667818