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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glGetProgramPipeline">
    <info>
        <copyright>
            <year>2010-2013</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glGetProgramPipeline</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glGetProgramPipeline</refname>
        <refpurpose>retrieve properties of a program pipeline object</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glGetProgramPipelineiv</function></funcdef>
                <paramdef>GLuint <parameter>pipeline</parameter></paramdef>
                <paramdef>GLenum <parameter>pname</parameter></paramdef>
                <paramdef>GLint *<parameter>params</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>pipeline</parameter></term>
            <listitem>
            <para>
                Specifies the name of a program pipeline object whose parameter retrieve.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>pname</parameter></term>
            <listitem>
            <para>
                Specifies the name of the parameter to retrieve.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>params</parameter></term>
            <listitem>
            <para>
                Specifies the address of a variable into which will be written the value or values
                of <parameter>pname</parameter> for <parameter>pipeline</parameter>.
            </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para>
            <function>glGetProgramPipelineiv</function> retrieves the value of a property of the program
            pipeline object <parameter>pipeline</parameter>. <parameter>pname</parameter> specifies the
            name of the parameter whose value to retrieve. The value of the parameter is written to
            the variable whose address is given by <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_ACTIVE_PROGRAM</constant>, the name of the
            active program object of the program pipeline object is returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_VERTEX_SHADER</constant>, the name of the
            current program object for the vertex shader type of the program pipeline object is
            returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_TESS_CONTROL_SHADER</constant>, the name of the
            current program object for the tessellation control shader type of the program pipeline object is
            returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_TESS_EVALUATION_SHADER</constant>, the name of the
            current program object for the tessellation evaluation shader type of the program pipeline object is
            returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_GEOMETRY_SHADER</constant>, the name of the
            current program object for the geometry shader type of the program pipeline object is
            returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_FRAGMENT_SHADER</constant>, the name of the
            current program object for the fragment shader type of the program pipeline object is
            returned in <parameter>params</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_INFO_LOG_LENGTH</constant>, the length of the
            info log, including the null terminator, is returned in <parameter>params</parameter>. If there
            is no info log, zero is returned.
        </para>
    </refsect1>
    <refsect1 xml:id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>pipeline</parameter> is not zero or
            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_ENUM</constant> is generated if <parameter>pname</parameter> is not one
            of the accepted values.
        </para>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glGetProgramPipelines</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glBindProgramPipeline</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glDeleteProgramPipelines</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 2010-2013 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.
            <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
        </para>
    </refsect1>
</refentry>
