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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glTexImage2DMultisample">
    <info>
        <copyright>
            <year>2010-2014</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glTexImage2DMultisample</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glTexImage2DMultisample</refname>
        <refpurpose>establish the data storage, format, dimensions, and number of samples of a multisample texture's image</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glTexImage2DMultisample</function></funcdef>
                <paramdef>GLenum <parameter>target</parameter></paramdef>
                <paramdef>GLsizei <parameter>samples</parameter></paramdef>
                <paramdef>GLenum <parameter>internalformat</parameter></paramdef>
                <paramdef>GLsizei <parameter>width</parameter></paramdef>
                <paramdef>GLsizei <parameter>height</parameter></paramdef>
                <paramdef>GLboolean <parameter>fixedsamplelocations</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>target</parameter></term>
            <listitem>
                <para>
                    Specifies the target of the operation. <parameter>target</parameter> must be <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> or <constant>GL_PROXY_TEXTURE_2D_MULTISAMPLE</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>samples</parameter></term>
            <listitem>
                <para>
                    The number of samples in the multisample texture's image.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>internalformat</parameter></term>
            <listitem>
                <para>
                    The internal format to be used to store the multisample texture's image. <parameter>internalformat</parameter> must specify a color-renderable, depth-renderable, or stencil-renderable format.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>width</parameter></term>
            <listitem>
                <para>
                    The width of the multisample texture's image, in texels.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>height</parameter></term>
            <listitem>
                <para>
                    The height of the multisample texture's image, in texels.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>fixedsamplelocations</parameter></term>
            <listitem>
                <para>
                    Specifies whether the image will use identical sample locations and the same number of samples for all texels in the image, and the sample locations will not
                    depend on the internal format or size of the image.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para>
            <function>glTexImage2DMultisample</function> establishes the data storage, format, dimensions and number of samples of a multisample texture's image.
        </para>
        <para>
            <parameter>target</parameter> must be
            <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> or
            <constant>GL_PROXY_TEXTURE_2D_MULTISAMPLE</constant>.
            <parameter>width</parameter> and <parameter>height</parameter>
            are the dimensions in texels of the texture, and must be in the
            range zero to the value of
            <constant>GL_MAX_TEXTURE_SIZE</constant> minus one.
            <parameter>samples</parameter> specifies the number of samples
            in the image and must be in the range zero to the value of
            <constant>GL_MAX_SAMPLES</constant> minus one.
        </para>
        <para>
            <parameter>internalformat</parameter> must be a color-renderable, depth-renderable, or stencil-renderable format.
        </para>
        <para>
            If <parameter>fixedsamplelocations</parameter> is <constant>GL_TRUE</constant>, the image will use identical sample locations and the same
            number of samples for all texels in the image, and the sample locations will not depend on the internal format or size of the image.
        </para>
        <para>
            When a multisample texture is accessed in a shader, the access takes one vector of integers describing which texel to fetch and an integer
            corresponding to the sample numbers describing which sample within the texel to fetch. No standard sampling instructions are allowed on the
            multisample texture targets.
        </para>
    </refsect1>
    <refsect1 xml:id="notes"><title>Notes</title>
        <para>
            <function>glTexImage2DMultisample</function> is available only if the GL version is 3.2 or greater.
        </para>
    </refsect1>
    <refsect1 xml:id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>internalformat</parameter> is a depth- or stencil-renderable format and <parameter>samples</parameter>
            is greater than the value of <constant>GL_MAX_DEPTH_TEXTURE_SAMPLES</constant>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>internalformat</parameter> is a color-renderable format and <parameter>samples</parameter> is
            greater than the value of <constant>GL_MAX_COLOR_TEXTURE_SAMPLES</constant>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>internalformat</parameter> is a signed or unsigned integer format and <parameter>samples</parameter>
            is greater than the value of <constant>GL_MAX_INTEGER_SAMPLES</constant>.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if either <parameter>width</parameter> or <parameter>height</parameter> negative or is greater than <constant>GL_MAX_TEXTURE_SIZE</constant>.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>samples</parameter> is zero.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>samples</parameter> is greater than the
            maximum number of samples supported for this <parameter>target</parameter> and <parameter>internalformat</parameter>.
        </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>glTexImage2DMultisample</function></entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='32']/*)"/>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexImage2DMultisample</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            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>
