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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glBindTexture">
    <info>
        <copyright>
            <year>1991-2006</year>
            <holder>Silicon Graphics, Inc.</holder>
        </copyright>
        <copyright>
            <year>2010-2014</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glBindTexture</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glBindTexture</refname>
        <refpurpose>bind a named texture to a texturing target</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glBindTexture</function></funcdef>
                <paramdef>GLenum <parameter>target</parameter></paramdef>
                <paramdef>GLuint <parameter>texture</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>target</parameter></term>
            <listitem>
                <para>
                    Specifies the target to which the texture is bound.
                    Must be either
                    <constant>GL_TEXTURE_2D</constant>,
                    <constant>GL_TEXTURE_3D</constant>,
                    <constant>GL_TEXTURE_2D_ARRAY</constant>, or
                    <constant>GL_TEXTURE_CUBE_MAP</constant>,
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>texture</parameter></term>
            <listitem>
                <para>
                    Specifies the name of a texture.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para>
            <function>glBindTexture</function> binds the texture object with name <parameter>texture</parameter> to the texture target specified
            by <parameter>target</parameter>. Calling <function>glBindTexture</function> with
            <parameter>target</parameter> set to
            <constant>GL_TEXTURE_2D</constant>, <constant>GL_TEXTURE_3D</constant>, <constant>GL_TEXTURE_2D_ARRAY</constant>, or
            <constant>GL_TEXTURE_CUBE_MAP</constant> and <parameter>texture</parameter> set to the name of the new texture binds the
            texture name to that target. When a texture is bound to a target, the previous binding for that target is automatically broken.
        </para>
        <para>
            Texture names are unsigned integers. The value zero is reserved to
            represent the default texture for each texture target.
            Texture names and the corresponding texture contents are local to
            the shared object space of the current GL rendering context;
            two rendering contexts share texture names only if they
            explicitly enable sharing between contexts through the appropriate GL windows interfaces functions.
        </para>
        <para>
            You must use <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry> to generate a set of new texture names.
        </para>
        <para>
            When a texture is first bound, it assumes the specified target:
            A texture first bound to <constant>GL_TEXTURE_2D</constant> becomes two-dimensional texture, a
            texture first bound to <constant>GL_TEXTURE_3D</constant> becomes three-dimensional texture, a
            texture first bound to <constant>GL_TEXTURE_2D_ARRAY</constant> becomes two-dimensional arary texture, and a
            texture first bound to <constant>GL_TEXTURE_CUBE_MAP</constant> becomes a cube-mapped texture.
            The state of a two-dimensional texture immediately after it is first bound is equivalent to the state of the
            default <constant>GL_TEXTURE_2D</constant> at GL initialization, and similarly for the other texture types.
        </para>
        <para>
            While a texture is bound, GL operations on the target to which it is
            bound affect the bound texture, and queries of the target to which it
            is bound return state from the bound texture.
            In effect, the texture targets become aliases for the textures currently
            bound to them, and the texture name zero refers to the default textures
            that were bound to them at initialization.
        </para>
        <para>
            A texture binding created with <function>glBindTexture</function> remains active until a different
            texture is bound to the same target, or until the bound texture is
            deleted with <citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>.
        </para>
        <para>
            Once created, a named texture may be re-bound to its same original target as often as needed.
            It is usually much faster to use <function>glBindTexture</function> to bind an existing named
            texture to one of the texture targets than it is to reload the texture image
            using <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry> or another similar function.
        </para>
        <para>
                        Texture binding is affected by the setting of the state <constant>GL_ACTIVE_TEXTURE</constant> (see
                        <citerefentry><refentrytitle>glActiveTexture</refentrytitle></citerefentry>).
                        A texture object may be bound to more than one texture unit simultaneously.
        </para>
    </refsect1>
    <refsect1 xml:id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> is not one of the allowable
            values.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>texture</parameter> was previously created with a target
            that doesn't match that of <parameter>target</parameter>.
        </para>
    </refsect1>
    <refsect1 xml:id="associatedgets"><title>Associated Gets</title>
        <para>
            <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_TEXTURE_BINDING_2D</constant>,
            <constant>GL_TEXTURE_BINDING_3D</constant>, <constant>GL_TEXTURE_BINDING_2D_ARRAY</constant>, or <constant>GL_TEXTURE_BINDING_CUBE_MAP</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>glBindTexture</entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='es20']/*)"/>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGetTexParameter</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glIsTexture</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 1991-2006 Silicon Graphics, Inc.
            Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
            This document is licensed under the SGI Free Software B License.
            For details, see
            <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</link>.
        </para>
    </refsect1>
</refentry>
