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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
<refentry id="glFramebufferTexture">
<refentryinfo>
<copyright>
<year>2010-2013</year>
<holder>Khronos Group</holder>
</copyright>
</refentryinfo>
<refmeta>
<refentrytitle>glFramebufferTexture</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glFramebufferTexture</refname>
<refpurpose>attach a level of a texture object as a logical buffer to the currently bound framebuffer object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glFramebufferTexture</function></funcdef>
<paramdef>GLenum <parameter>target</parameter></paramdef>
<paramdef>GLenum <parameter>attachment</parameter></paramdef>
<paramdef>GLuint <parameter>texture</parameter></paramdef>
<paramdef>GLint <parameter>level</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glFramebufferTexture1D</function></funcdef>
<paramdef>GLenum <parameter>target</parameter></paramdef>
<paramdef>GLenum <parameter>attachment</parameter></paramdef>
<paramdef>GLenum <parameter>textarget</parameter></paramdef>
<paramdef>GLuint <parameter>texture</parameter></paramdef>
<paramdef>GLint <parameter>level</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glFramebufferTexture2D</function></funcdef>
<paramdef>GLenum <parameter>target</parameter></paramdef>
<paramdef>GLenum <parameter>attachment</parameter></paramdef>
<paramdef>GLenum <parameter>textarget</parameter></paramdef>
<paramdef>GLuint <parameter>texture</parameter></paramdef>
<paramdef>GLint <parameter>level</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glFramebufferTexture3D</function></funcdef>
<paramdef>GLenum <parameter>target</parameter></paramdef>
<paramdef>GLenum <parameter>attachment</parameter></paramdef>
<paramdef>GLenum <parameter>textarget</parameter></paramdef>
<paramdef>GLuint <parameter>texture</parameter></paramdef>
<paramdef>GLint <parameter>level</parameter></paramdef>
<paramdef>GLint <parameter>layer</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>target</parameter></term>
<listitem>
<para>
Specifies the framebuffer target. <parameter>target</parameter> must be <constant>GL_DRAW_FRAMEBUFFER</constant>,
<constant>GL_READ_FRAMEBUFFER</constant>, or <constant>GL_FRAMEBUFFER</constant>. <constant>GL_FRAMEBUFFER</constant>
is equivalent to <constant>GL_DRAW_FRAMEBUFFER</constant>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>attachment</parameter></term>
<listitem>
<para>
Specifies the attachment point of the framebuffer. <parameter>attachment</parameter> must be
<constant>GL_COLOR_ATTACHMENT</constant><emphasis>i</emphasis>, <constant>GL_DEPTH_ATTACHMENT</constant>,
<constant>GL_STENCIL_ATTACHMENT</constant> or <constant>GL_DEPTH_STENCIL_ATTACHMENT</constant>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>textarget</parameter></term>
<listitem>
<para>
For <function>glFramebufferTexture1D</function>, <function>glFramebufferTexture2D</function> and
<function>glFramebufferTexture3D</function>, specifies what type of texture is expected
in the <parameter>texture</parameter> parameter, or for cube map textures, which face is to be attached.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>texture</parameter></term>
<listitem>
<para>
Specifies the texture object to attach to the framebuffer attachment point named by <parameter>attachment</parameter>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>level</parameter></term>
<listitem>
<para>
Specifies the mipmap level of <parameter>texture</parameter> to attach.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="description"><title>Description</title>
<para>
<function>glFramebufferTexture</function>, <function>glFramebufferTexture1D</function>, <function>glFramebufferTexture2D</function>,
and <function>glFramebufferTexture</function> attach a selected mipmap level or image of a texture object as one of the
logical buffers of the framebuffer object currently bound to <parameter>target</parameter>. <parameter>target</parameter> must
be <constant>GL_DRAW_FRAMEBUFFER</constant>, <constant>GL_READ_FRAMEBUFFER</constant>, or <constant>GL_FRAMEBUFFER</constant>.
<constant>GL_FRAMEBUFFER</constant> is equivalent to <constant>GL_DRAW_FRAMEBUFFER</constant>.
</para>
<para>
<parameter>attachment</parameter> specifies the logical
attachment of the framebuffer and must be
<constant>GL_COLOR_ATTACHMENT</constant><emphasis>i</emphasis>,
<constant>GL_DEPTH_ATTACHMENT</constant>,
<constant>GL_STENCIL_ATTACHMENT</constant> or
<constant>GL_DEPTH_STENCIL_ATTACHMENT</constant>.
<emphasis>i</emphasis> in
<constant>GL_COLOR_ATTACHMENT</constant><emphasis>i</emphasis>
may range from zero to the value of
<constant>GL_MAX_COLOR_ATTACHMENTS</constant> minus one.
Attaching a level of a texture to
<constant>GL_DEPTH_STENCIL_ATTACHMENT</constant> is equivalent
to attaching that level to both the
<constant>GL_DEPTH_ATTACHMENT</constant>
<emphasis>and</emphasis> the
<constant>GL_STENCIL_ATTACHMENT</constant> attachment points
simultaneously.
</para>
<para>
<parameter>textarget</parameter> specifies what type of texture is named by <parameter>texture</parameter>, and for
cube map textures, specifies the face that is to be attached. If <parameter>texture</parameter> is not zero, it
must be the name of an existing texture with type <parameter>textarget</parameter>, unless it is a cube map
texture, in which case <parameter>textarget</parameter> must be <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_X</constant>
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_X</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Y</constant>,
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Z</constant>, or
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</constant>.
</para>
<para>
If <parameter>texture</parameter> is non-zero, the specified <parameter>level</parameter> of the texture object named
<parameter>texture</parameter> is attached to the framebfufer attachment point named by <parameter>attachment</parameter>.
For <function>glFramebufferTexture1D</function>, <function>glFramebufferTexture2D</function>, and
<function>glFramebufferTexture3D</function>, <parameter>texture</parameter> must be zero or the name of an existing
texture with a target of <parameter>textarget</parameter>, or <parameter>texture</parameter> must be the name
of an existing cube-map texture and <parameter>textarget</parameter> must be one of <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_X</constant>,
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Y</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Z</constant>,
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_X</constant>, <constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</constant>, or
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</constant>.
</para>
<para>
If <parameter>textarget</parameter> is <constant>GL_TEXTURE_RECTANGLE</constant>, <constant>GL_TEXTURE_2D_MULTISAMPLE</constant>,
or <constant>GL_TEXTURE_2D_MULTISAMPLE_ARRAY</constant>, then <parameter>level</parameter> must be zero. If <parameter>textarget</parameter>
is <constant>GL_TEXTURE_3D</constant>, then level must be greater than or equal to zero and less than or equal to log<subscript>2</subscript>
of the value of <constant>GL_MAX_3D_TEXTURE_SIZE</constant>. If <parameter>textarget</parameter> is one of <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_X</constant>,
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Y</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Z</constant>, <constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_X</constant>,
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</constant>, or <constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</constant>, then <parameter>level</parameter> must be greater
than or equal to zero and less than or equal to log<subscript>2</subscript> of the value of <constant>GL_MAX_CUBE_MAP_TEXTURE_SIZE</constant>. For all other
values of <parameter>textarget</parameter>, <parameter>level</parameter> must be greater than or equal to zero and no larger than log<subscript>2</subscript>
of the value of <constant>GL_MAX_TEXTURE_SIZE</constant>.
</para>
<para>
<parameter>layer</parameter> specifies the layer of a 2-dimensional image within a 3-dimensional texture.
</para>
<para>
For <function>glFramebufferTexture1D</function>, if <parameter>texture</parameter> is not zero, then <parameter>textarget</parameter> must
be <constant>GL_TEXTURE_1D</constant>. For <function>glFramebufferTexture2D</function>, if <parameter>texture</parameter> is not zero,
<parameter>textarget</parameter> must be one of <constant>GL_TEXTURE_2D</constant>, <constant>GL_TEXTURE_RECTANGLE</constant>,
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_X</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Y</constant>, <constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Z</constant>,
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_X</constant>, <constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</constant>, <constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</constant>, or
<constant>GL_TEXTURE_2D_MULTISAMPLE</constant>. For <function>glFramebufferTexture3D</function>, if <parameter>texture</parameter> is
not zero, then <parameter>textarget</parameter> must be <constant>GL_TEXTURE_3D</constant>.
</para>
</refsect1>
<refsect1 id="notes"><title>Notes</title>
<para>
<function>glFramebufferTexture</function> is available only if the GL version is 3.2 or greater.
</para>
</refsect1>
<refsect1 id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> is not one of the accepted tokens.
</para>
<para>
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>renderbuffertarget</parameter> is not <constant>GL_RENDERBUFFER</constant>.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if zero is bound to <parameter>target</parameter>.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if <parameter>textarget</parameter> and <parameter>texture</parameter>
are not compatible.
</para>
</refsect1>
<refsect1 id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glGenFramebuffers</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glBindFramebuffer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glGenRenderbuffers</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glFramebufferTexture</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glFramebufferTexture1D</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glFramebufferTexture2D</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glFramebufferTexture3D</refentrytitle></citerefentry>
</para>
</refsect1>
<refsect1 id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"></trademark> 2010-2013 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>
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