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<refentry id="glActiveShaderProgram">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>2010</year>
                <holder>Khronos Group</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glActiveShaderProgram</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glActiveShaderProgram</refname>
        <refpurpose>set the active program object for a program pipeline object</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glActiveShaderProgram</function></funcdef>
                <paramdef>GLuint <parameter>pipeline</parameter></paramdef>
                <paramdef>GLuint <parameter>program</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>pipeline</parameter></term>
            <listitem>
            <para>
                Specifies the program pipeline object to set the active program object for.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>program</parameter></term>
            <listitem>
            <para>
                Specifies the program object to set as the active program pipeline object <parameter>pipeline</parameter>.
            </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glActiveShaderProgram</function> sets the linked program named by <parameter>program</parameter>
            to be the active program for the program pipeline object <parameter>pipeline</parameter>. The active
            program in the active program pipeline object is the target of calls to <citerefentry><refentrytitle>glUniform</refentrytitle></citerefentry>
            when no program has been made current through a call to <citerefentry><refentrytitle>glUseProgram</refentrytitle></citerefentry>.
       </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>pipeline</parameter> is not
            a name previously returned from a call to <citerefentry><refentrytitle>glGenProgramPipelines</refentrytitle></citerefentry>
            or if such a name has been deleted by a call to
            <citerefentry><refentrytitle>glDeleteProgramPipelines</refentrytitle></citerefentry>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>program</parameter> refers
            to a program object that has not been successfully linked.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glGenProgramPipelines</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glDeleteProgramPipelines</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glIsProgramPipeline</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glUseProgram</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glUniform</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"></trademark> 2010 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
        </para>
    </refsect1>
</refentry>
