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<refentry id="glProgramParameter">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>2010</year>
                <holder>Khronos Group</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glProgramParameter</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glProgramParameter</refname>
        <refpurpose>specify a parameter for a program object</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glProgramParameteri</function></funcdef>
                <paramdef>GLuint <parameter>program</parameter></paramdef>
                <paramdef>GLenum <parameter>pname</parameter></paramdef>
                <paramdef>GLint <parameter>value</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>program</parameter></term>
            <listitem>
            <para>
                Specifies the name of a program object whose parameter to modify.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>pname</parameter></term>
            <listitem>
            <para>
                Specifies the name of the parameter to modify.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>value</parameter></term>
            <listitem>
            <para>
                Specifies the new value of the parameter specified by <parameter>pname</parameter> for <parameter>program</parameter>.
            </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glProgramParameter</function> specifies a new value for the parameter nameed by
            <parameter>pname</parameter> for the program object <parameter>program</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant>,
            <parameter>value</parameter> should be <constant>GL_FALSE</constant> or <constant>GL_TRUE</constant>
            to indicate to the implementation the intention of the application to retrieve the program's
            binary representation with <citerefentry><refentrytitle>glGetProgramBinary</refentrytitle></citerefentry>.
            The implementation may use this information to store information that may be useful for a future
            query of the program's binary. It is recommended to set <constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant>
            for the program to <constant>GL_TRUE</constant> before calling
            <citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>, and
            using the program at run-time if the binary is to be retrieved later.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_PROGRAM_SEPARABLE</constant>, <parameter>value</parameter>
            must be <constant>GL_TRUE</constant> or <constant>GL_FALSE</constant> and indicates whether
            <parameter>program</parameter> can be bound to individual pipeline stages via
            <citerefentry><refentrytitle>glUseProgramStages</refentrytitle></citerefentry>. A program's
            <constant>GL_PROGRAM_SEPARABLE</constant> parameter must be set to <constant>GL_TRUE</constant>
            <emphasis>before</emphasis> <citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>
            is called in order for it to be usable with a program pipeline object. The initial state of
            <constant>GL_PROGRAM_SEPARABLE</constant> is <constant>GL_FALSE</constant>.
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>program</parameter> is not the
            name of an existing program object.
        </para>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>pname</parameter> is not one
            of the accepted values.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>value</parameter> is not a valid
            value for the parameter named by <parameter>pname</parameter>.
        </para>
    </refsect1>
    <refsect1 id="associatedgets"><title>Associated Gets</title>
        <para>
            <citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGetProgramBinary</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glProgramBinary</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>
