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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glDispatchCompute">
    <info>
        <copyright>
            <year>2012-2014</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glDispatchCompute</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glDispatchCompute</refname>
        <refpurpose>launch one or more compute work groups</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glDispatchCompute</function></funcdef>
                <paramdef>GLuint <parameter>num_groups_x</parameter></paramdef>
                <paramdef>GLuint <parameter>num_groups_y</parameter></paramdef>
                <paramdef>GLuint <parameter>num_groups_z</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>num_groups_x</parameter></term>
            <listitem>
                <para>
                    The number of work groups to be launched in the X dimension.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>num_groups_y</parameter></term>
            <listitem>
                <para>
                    The number of work groups to be launched in the Y dimension.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>num_groups_z</parameter></term>
            <listitem>
                <para>
                    The number of work groups to be launched in the Z dimension.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para>
            <function>glDispatchCompute</function> launches one or more compute
            work groups. Each work group is processed by the active program object for the compute
            shader stage. While the individual shader invocations within a work group are
            executed as a unit, work groups are executed completely independently and in
            unspecified order. <parameter>num_groups_x</parameter>, <parameter>num_groups_y</parameter>
            and <parameter>num_groups_z</parameter> specify the number of local
            work groups that will be dispatched in the X, Y and Z dimensions, respectively.
        </para>
    </refsect1>
    <refsect1 xml:id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if there is no active program
            for the compute shader stage.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if any of <parameter>num_groups_x</parameter>,
            <parameter>num_groups_y</parameter>, or <parameter>num_groups_z</parameter> is greater than or
            equal to the maximum work-group count for the corresponding dimension.
        </para>
    </refsect1>
    <refsect1 xml:id="associatedgets"><title>Associated Gets</title>
        <para>
            <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MAX_COMPUTE_WORK_GROUP_COUNT</constant>
        </para>
    </refsect1>
    <refsect1 xml:id="versions">
        <title>API Version Support</title>
        <informaltable>
            <tgroup cols="4" align="left">
                <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
                <tbody>
                    <row>
                        <entry><function>glDispatchCompute</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='es31']/*)"/>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glDispatchComputeIndirect</refentrytitle></citerefentry>.
        </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 2012-2014 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>
