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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glFramebufferParameteri">
    <info>
        <copyright>
            <year>2012-2015</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glFramebufferParameteri</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glFramebufferParameteri</refname>
        <refpurpose>set a named parameter of a framebuffer</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glFramebufferParameteri</function></funcdef>
                <paramdef>GLenum <parameter>target</parameter></paramdef>
                <paramdef>GLenum <parameter>pname</parameter></paramdef>
                <paramdef>GLint <parameter>param</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>target</parameter></term>
            <listitem>
                <para>
                    The target of the operation, which must be <constant>GL_READ_FRAMEBUFFER</constant>,
                    <constant>GL_DRAW_FRAMEBUFFER</constant> or <constant>GL_FRAMEBUFFER</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>pname</parameter></term>
            <listitem>
                <para>
                    A token indicating the parameter to be modified.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>param</parameter></term>
            <listitem>
                <para>
                    The new value for the parameter named <parameter>pname</parameter>.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para>
            <function>glFramebufferParameteri</function> modifies the current value of the parameter
            named <parameter>pname</parameter> in the framebuffer bound to <parameter>target</parameter>.
            <parameter>target</parameter> must be <constant>GL_READ_FRAMEBFUFFER</constant>,
            <constant>GL_DRAW_FRAMEBUFFER</constant> or <constant>GL_FRAMEBUFFER</constant>. The
            token <constant>GL_FRAMEBUFFER</constant> is treated as <constant>GL_DRAW_FRAMEBUFFER</constant>.
            A non-default framebuffer must be bound to <parameter>target</parameter>.
        </para>
        <para>
            <parameter>pname</parameter> specifies the parameter to be modified. The following symbols
            are accepted in <parameter>pname</parameter>:
        </para>
        <variablelist>
            <varlistentry>
                <term><constant>GL_FRAMEBUFFER_DEFAULT_WIDTH</constant></term>
                <listitem>
                    <para>
                        <parameter>param</parameter> specifies the assumed with for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the width of those attachments is used, otherwise
                        the value of <constant>GL_FRAMEBUFFER_DEFAULT_WIDTH</constant> is used for the
                        framebuffer. <parameter>param</parameter> must be greater than or equal to zero and less than
                        or equal to the value of <constant>GL_MAX_FRAMEBUFFER_WIDTH</constant>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_FRAMEBUFFER_DEFAULT_HEIGHT</constant></term>
                <listitem>
                    <para>
                        <parameter>param</parameter> specifies the assumed height for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the height of those attachments is used, otherwise
                        the value of <constant>GL_FRAMEBUFFER_DEFAULT_HEIGHT</constant> is used for the
                        framebuffer. <parameter>param</parameter> must be greater than or equal to zero and less than
                        or equal to the value of <constant>GL_MAX_FRAMEBUFFER_HEIGHT</constant>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_FRAMEBUFFER_DEFAULT_SAMPLES</constant></term>
                <listitem>
                    <para>
                        <parameter>param</parameter> specifies the assumed number of samples in a framebuffer object with no attachments. If a
                        framebuffer has attachments then the sample count of those attachments is used, otherwise
                        the value of <constant>GL_FRAMEBUFFER_DEFAULT_SAMPLES</constant> is used for the
                        framebuffer. <parameter>param</parameter> must be greater than or equal to zero and less than
                        or equal to the value of <constant>GL_MAX_FRAMEBUFFER_SAMPLE</constant>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS</constant></term>
                <listitem>
                    <para>
                        <parameter>param</parameter> specifies whether the framebuffer should assume identical sample locations and
                        the same number of samples for all texels in the virtual image. If <parameter>param</parameter> is zero,
                        then the implementation may vary the position or the count of samples within the virtual image from
                        pixel to pixel, otherwise it will use the same sample position and count for all pixels in the virtual image.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_FRAMEBUFFER_DEFAULT_LAYERS</constant></term>
                <listitem>
                    <para>
                        <parameter>param</parameter> specifies the assumed number of layers for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the layer count of those attachments is used, otherwise
                        the value of <constant>GL_FRAMEBUFFER_DEFAULT_LAYERS</constant> is used for the
                        framebuffer. <parameter>param</parameter> must be greater than or equal to zero and less than
                        or equal to the value of <constant>GL_MAX_FRAMEBUFFER_LAYERS</constant>.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
    </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 accepted
            framebuffer targets.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>pname</parameter> is <constant>GL_FRAMEBUFFER_DEFAULT_WIDTH</constant>
            and <parameter>param</parameter> is less than zero or greater than the value of <constant>GL_MAX_FRAMEBUFFER_WIDTH</constant>.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>pname</parameter> is <constant>GL_FRAMEBUFFER_DEFAULT_HEIGHT</constant>
            and <parameter>param</parameter> is less than zero or greater than the value of <constant>GL_MAX_FRAMEBUFFER_HEIGHT</constant>.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>pname</parameter> is <constant>GL_FRAMEBUFFER_DEFAULT_SAMPLES</constant>
            and <parameter>param</parameter> is less than zero or greater than the value of <constant>GL_MAX_FRAMEBUFFER_SAMPLES</constant>.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>pname</parameter> is <constant>GL_FRAMEBUFFER_DEFAULT_LAYERS</constant> 
            and <parameter>param</parameter> is less than zero or greater than the value of <constant>GL_MAX_FRAMEBUFFER_LAYERS</constant>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if the default framebuffer is bound to <parameter>target</parameter>.
        </para>
    </refsect1>
    <refsect1 xml:id="associatedgets"><title>Associated Gets</title>
        <para>
            <citerefentry><refentrytitle>glGetFramebufferParameteriv</refentrytitle></citerefentry>.
        </para>
    </refsect1>
    <refsect1 xml:id="versions">
        <title>API Version Support</title>
        <informaltable>
            <tgroup cols="5" align="left">
                <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
                <tbody>
                    <row>
                        <entry><function>glFramebufferParameteri</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>glBindFramebuffer</refentrytitle></citerefentry>,
        </para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 2012-2015 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>
