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<refentry id="glGetProgramBinary">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>2010</year>
                <holder>Khronos Group</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glGetProgramBinary</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glGetProgramBinary</refname>
        <refpurpose>return a binary representation of a program object's compiled and linked executable source</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glGetProgramBinary</function></funcdef>
                <paramdef>GLuint <parameter>program</parameter></paramdef>
                <paramdef>GLsizei <parameter>bufsize</parameter></paramdef>
                <paramdef>GLsizei *<parameter>length</parameter></paramdef>
                <paramdef>GLenum *<parameter>binaryFormat</parameter></paramdef>
                <paramdef>void *<parameter>binary</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 binary representation to retrieve.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>bufSize</parameter></term>
            <listitem>
            <para>
                Specifies the size of the buffer whose address is given by <parameter>binary</parameter>.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>length</parameter></term>
            <listitem>
            <para>
                Specifies the address of a variable to receive the number of bytes written into <parameter>binary</parameter>.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>binaryFormat</parameter></term>
            <listitem>
            <para>
                Specifies the address of a variable to receive a token indicating the format of the binary data returned by the GL.
            </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>binary</parameter></term>
            <listitem>
            <para>
                Specifies the address an array into which the GL will return <parameter>program</parameter>'s binary representation.
            </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glGetProgramBinary</function> returns a binary representation of the compiled
            and linked executable for <parameter>program</parameter> into the array of bytes whose
            address is specified in <parameter>binary</parameter>. The maximum number of bytes that
            may be written into <parameter>binary</parameter> is specified by <parameter>bufSize</parameter>.
            If the program binary is greater in size than <parameter>bufSize</parameter> bytes,
            then an error is generated, otherwise the actual number of bytes written into <parameter>binary</parameter>
            is returned in the variable whose address is given by <parameter>length</parameter>. If
            <parameter>length</parameter> is <constant>NULL</constant>, then no length is returned.
        </para>
        <para>
            The format of the program binary written into <parameter>binary</parameter> is returned in
            the variable whose address is given by <parameter>binaryFormat</parameter>, and may be implementation dependent. The binary produced
            by the GL may subsequently be returned to the GL by calling <citerefentry><refentrytitle>glProgramBinary</refentrytitle></citerefentry>,
            with <parameter>binaryFormat</parameter> and <parameter>length</parameter> set to the values
            returned by <function>glGetProgramBinary</function>, and passing the returned binary data
            in the <parameter>binary</parameter> parameter.
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>bufSize</parameter> is less than
            the size of <constant>GL_PROGRAM_BINARY_LENGTH</constant> for <parameter>program</parameter>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <constant>GL_LINK_STATUS</constant> for the
            program object is false.
        </para>
    </refsect1>
    <refsect1 id="associatedgets"><title>Associated Gets</title>
        <para>
            <citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry> with argument <constant>GL_PROGRAM_BINARY_LENGTH</constant>
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glGetProgram</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>
