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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glEnableVertexAttribArray">
  <info>
    <copyright>
      <year>2003-2005</year>

      <holder>3Dlabs Inc. Ltd.</holder>
    </copyright>

    <copyright>
      <year>2010-2014</year>

      <holder>Khronos Group</holder>
    </copyright>
  </info>

  <refmeta>
    <refentrytitle>glEnableVertexAttribArray</refentrytitle>

    <manvolnum>3G</manvolnum>
  </refmeta>

  <refnamediv>
    <refdescriptor>glEnableVertexAttribArray</refdescriptor>

    <refname>glEnableVertexAttribArray</refname>

    <refname>glDisableVertexAttribArray</refname>

    <refname>glEnableVertexArrayAttrib</refname>

    <refname>glDisableVertexArrayAttrib</refname>

    <refpurpose>Enable or disable a generic vertex attribute
    array</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <title>C Specification</title>

    <funcsynopsis>
      <funcprototype>
        <funcdef>void <function>glEnableVertexAttribArray</function></funcdef>

        <paramdef>GLuint <parameter>index</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>void <function>glDisableVertexAttribArray</function></funcdef>

        <paramdef>GLuint <parameter>index</parameter></paramdef>
      </funcprototype>

      <!-- DSA commands -->

      <funcprototype>
        <funcdef>void <function>glEnableVertexArrayAttrib</function></funcdef>

        <paramdef>GLuint <parameter>vaobj</parameter></paramdef>

        <paramdef>GLuint <parameter>index</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>void <function>glDisableVertexArrayAttrib</function></funcdef>

        <paramdef>GLuint <parameter>vaobj</parameter></paramdef>

        <paramdef>GLuint <parameter>index</parameter></paramdef>
      </funcprototype>
    </funcsynopsis>
  </refsynopsisdiv>

  <refsect1 xml:id="parameters">
    <title>Parameters</title>

    <variablelist>
      <varlistentry>
        <term><parameter>vaobj</parameter></term>

        <listitem>
          <para>Specifies the name of the vertex array object for
          <function>glDisableVertexArrayAttrib</function> and
          <function>glEnableVertexArrayAttrib</function> functions.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>index</parameter></term>

        <listitem>
          <para>Specifies the index of the generic vertex attribute to be
          enabled or disabled.</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1 xml:id="description">
    <title>Description</title>

    <para><function>glEnableVertexAttribArray</function> and
    <function>glEnableVertexArrayAttrib</function> enable the generic vertex
    attribute array specified by <parameter>index</parameter>.
    <function>glEnableVertexAttribArray</function> uses currently bound vertex
    array object for the operation, whereas
    <function>glEnableVertexArrayAttrib</function> updates state of the vertex
    array object with ID <parameter>vaobj</parameter>.</para>

    <para><function>glDisableVertexAttribArray</function> and
    <function>glDisableVertexArrayAttrib</function> disable the generic vertex
    attribute array specified by <parameter>index</parameter>.
    <function>glDisableVertexAttribArray</function> uses currently bound
    vertex array object for the operation, whereas
    <function>glDisableVertexArrayAttrib</function> updates state of the
    vertex array object with ID <parameter>vaobj</parameter>.</para>

    <para>
        By default, all client-side capabilities are disabled, including all
        generic vertex attribute arrays. If enabled, the values in the generic
        vertex attribute array will be accessed and used for rendering when calls
        are made to vertex array commands such as
        <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
        <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
        <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
        <citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>, or
        <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>.
    </para>
  </refsect1>

  <refsect1 xml:id="errors">
    <title>Errors</title>

    <para><constant>GL_INVALID_OPERATION</constant> is generated by
    <function>glEnableVertexAttribArray</function> and
    <function>glDisableVertexAttribArray</function> if no vertex array object
    is bound.</para>

    <para><constant>GL_INVALID_OPERATION</constant> is generated by
    <function>glEnableVertexArrayAttrib</function> and
    <function>glDisableVertexArrayAttrib</function> if
    <parameter>vaobj</parameter> is not the name of an existing vertex array
    object.</para>

    <para><constant>GL_INVALID_VALUE</constant> is generated if
    <parameter>index</parameter> is greater than or equal to
    <constant>GL_MAX_VERTEX_ATTRIBS</constant>.</para>
  </refsect1>

  <refsect1 xml:id="associatedgets">
    <title>Associated Gets</title>

    <para>
        <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument
        <constant>GL_MAX_VERTEX_ATTRIBS</constant>
    </para>

    <para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry> with arguments <parameter>index</parameter> and
        <constant>GL_VERTEX_ATTRIB_ARRAY_ENABLED</constant> <parameter/>
    </para>

    <para>
        <citerefentry><refentrytitle>glGetVertexAttribPointerv</refentrytitle></citerefentry> with arguments <parameter>index</parameter> and
        <constant>GL_VERTEX_ATTRIB_ARRAY_POINTER</constant>
    </para>
  </refsect1>
    <refsect1 xml:id="versions"><title>Version Support</title>
        <informaltable>
            <tgroup cols="13" align="left">
                <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
                <tbody>
                    <row>
                        <entry><function>glDisableVertexArrayAttrib</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='45']/*)"/>
                    </row>
                    <row>
                        <entry><function>glDisableVertexAttribArray</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='20']/*)"/>
                    </row>
                    <row>
                        <entry><function>glEnableVertexArrayAttrib</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='45']/*)"/>
                    </row>
                    <row>
                        <entry><function>glEnableVertexAttribArray</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='20']/*)"/>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
    <para>
    <citerefentry><refentrytitle>glBindAttribLocation</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glVertexAttrib</refentrytitle></citerefentry>,
    <citerefentry><refentrytitle>glVertexAttribPointer</refentrytitle></citerefentry>
    </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
            Copyright <trademark class="copyright"/> 2010-2014 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>
