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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" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glIsProgram - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glIsProgram"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glIsProgram — Determines if a name corresponds to a program object</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><p><code class="funcdef">GLboolean <b class="fsfunc">glIsProgram</b>(</code>GLuint <var class="pdparam">program</var><code>)</code>;</p></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>program</code></em></span></dt><dd><p>Specifies a potential program object.</p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p><code class="function">glIsProgram</code> returns
    <code class="constant">GL_TRUE</code> if <em class="parameter"><code>program</code></em>
    is the name of a program object previously created with 
        <a href="glCreateProgram.xml"><span class="citerefentry"><span class="refentrytitle">glCreateProgram</span></span></a> 
        and not yet deleted with <a href="glDeleteProgram.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteProgram</span></span></a>.
    If <em class="parameter"><code>program</code></em> is zero or a non-zero value that
    is not the name of a program object, or if an error occurs, 
        <code class="function">glIsProgram</code> returns <code class="constant">GL_FALSE</code>.</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>No error is generated if <em class="parameter"><code>program</code></em> is
    not a valid program object name.</p><p>A program object marked for deletion with <a href="glDeleteProgram.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteProgram</span></span></a>
        but still in use as part of current rendering state is still considered 
        a program object and <code class="function">glIsProgram</code> will return <code class="constant">GL_TRUE</code>.</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p><a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a>
    with the argument <code class="constant">GL_CURRENT_PROGRAM</code></p><p><a href="glGetActiveAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glGetActiveAttrib</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the index of
    an active attribute variable</p><p><a href="glGetActiveUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetActiveUniform</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the index of
    an active uniform variable</p><p><a href="glGetAttachedShaders.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttachedShaders</span></span></a>
    with argument <em class="parameter"><code>program</code></em></p><p><a href="glGetAttribLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttribLocation</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the name of an
    attribute variable</p><p><a href="glGetProgram.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the parameter
    to be queried</p><p><a href="glGetProgramInfoLog.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramInfoLog</span></span></a>
    with argument <em class="parameter"><code>program</code></em></p><p><a href="glGetUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniform</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the location
    of a uniform variable</p><p><a href="glGetUniformLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniformLocation</span></span></a>
    with arguments <em class="parameter"><code>program</code></em> and the name of a
    uniform variable</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p><a href="glAttachShader.xml"><span class="citerefentry"><span class="refentrytitle">glAttachShader</span></span></a>,
    <a href="glBindAttribLocation.xml"><span class="citerefentry"><span class="refentrytitle">glBindAttribLocation</span></span></a>,
    <a href="glCreateProgram.xml"><span class="citerefentry"><span class="refentrytitle">glCreateProgram</span></span></a>,
    <a href="glDeleteProgram.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteProgram</span></span></a>,
    <a href="glDetachShader.xml"><span class="citerefentry"><span class="refentrytitle">glDetachShader</span></span></a>,
    <a href="glLinkProgram.xml"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>,
    <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>,
    <a href="glUseProgram.xml"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>,
    <a href="glValidateProgram.xml"><span class="citerefentry"><span class="refentrytitle">glValidateProgram</span></span></a></p></div><div class="refsect1" lang="en" xml:lang="en"><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 href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p></div></div></body></html>
