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<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>glIsShader</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div class="refentry"><a id="glIsShader"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glIsShader — determine if a name corresponds to a shader object</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">GLboolean <strong class="fsfunc">glIsShader</strong>(</code></td><td>GLuint <var class="pdparam">shader</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>shader</code></em></span></dt><dd><p>Specifies a potential shader object.</p></dd></dl></div></div><div class="refsect1"><a id="description"></a><h2>Description</h2><p><code class="function">glIsShader</code> returns
	<code class="constant">GL_TRUE</code> if <em class="parameter"><code>shader</code></em> is
	the name of a shader object previously created with 
        <a class="citerefentry" href="glCreateShader.xml"><span class="citerefentry"><span class="refentrytitle">glCreateShader</span></span></a> 
        and not yet deleted with <a class="citerefentry" href="glDeleteShader.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteShader</span></span></a>. 
        If <em class="parameter"><code>shader</code></em> is
	zero or a non-zero value that is not the name of a shader
	object, or if an error occurs, <code class="function">glIsShader </code> returns
	<code class="constant">GL_FALSE</code>.</p></div><div class="refsect1"><a id="notes"></a><h2>Notes</h2><p>No error is generated if <em class="parameter"><code>shader</code></em> is
	not a valid shader object name.</p><p>A shader object marked for deletion with <a class="citerefentry" href="glDeleteShader.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteShader</span></span></a>
        but still attached to a program object is still considered 
        a shader object and <code class="function">glIsShader</code> will return <code class="constant">GL_TRUE</code>.</p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p><a class="citerefentry" href="glCreateShader.xml"><span class="citerefentry"><span class="refentrytitle">glCreateShader</span></span></a>,
	<a class="citerefentry" href="glDeleteShader.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteShader</span></span></a></p></div><div class="refsect1"><a id="copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 2003-2005 3Dlabs Inc. Ltd. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="ulink" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p></div></div></body></html>