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<refentry id="glRenderbufferStorage">
    <refmeta>
	<refentrytitle>glRenderbufferStorage</refentrytitle>
	<manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
	<refname>glRenderbufferStorage</refname>
	<refpurpose>create and initialize a renderbuffer object's data store</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
	<funcsynopsis>
	    <funcprototype>
		<funcdef>void <function>glRenderbufferStorage</function></funcdef>
		<paramdef>GLenum <parameter>target</parameter></paramdef>
		<paramdef>GLenum <parameter>internalformat</parameter></paramdef>
		<paramdef>GLsizei <parameter>width</parameter></paramdef>
		<paramdef>GLsizei <parameter>height</parameter></paramdef>
	    </funcprototype>
	</funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
	<variablelist>
	    <varlistentry>
		<term><parameter>target</parameter></term>
		<listitem>
		    <para>Specifies the renderbuffer target.  The symbolic constant must be
		    <constant>GL_RENDERBUFFER</constant>.</para>
		</listitem>
	    </varlistentry>
	    <varlistentry>
		<term><parameter>internalformat</parameter></term>
		<listitem>
		    <para>Specifies the color-renderable, depth-renderable, or 
		    stencil-renderable format of the renderbuffer. Must be one of the
		    following symbolic constants: 
		    <constant>GL_RGBA4</constant>, 
		    <constant>GL_RGB565</constant>, 
		    <constant>GL_RGB5_A1</constant>, 
		    <constant>GL_DEPTH_COMPONENT16</constant>, or
		    <constant>GL_STENCIL_INDEX8</constant>.</para>
		</listitem>
	    </varlistentry>
	    <varlistentry>
		<term><parameter>width</parameter></term>
		<listitem>
		    <para>Specifies the width of the renderbuffer in pixels.</para>
		</listitem>
	    </varlistentry>
	    <varlistentry>
		<term><parameter>height</parameter></term>
		<listitem>
		    <para>Specifies the height of the renderbuffer in pixels.</para>
		</listitem>
	    </varlistentry>
	</variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
	<para><function>glRenderbufferStorage</function> establishes the data
	storage, format, and dimensions of a renderbuffer object's image. Any
	existing data store for the renderbuffer is deleted and the contents
	of the new data store are undefined.</para>

	<para>An implementation may vary its allocation of internal component
	resolution based on any <function>glRenderbufferStorage</function> parameter
	(except <parameter>target</parameter>), but the allocation and chosen
	internal format must not be a function of any other state and cannot be
	changed once they are established. The actual resolution in bits of each
	component of the allocated image can be queried with
	<citerefentry><refentrytitle>glGetRenderbufferParameteriv</refentrytitle></citerefentry>.</para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
	<para><constant>GL_INVALID_ENUM</constant> is generated if
	<parameter>target</parameter> is not <constant>GL_RENDERBUFFER</constant>.</para>

	<para><constant>GL_INVALID_ENUM</constant> is generated if
	<parameter>internalformat</parameter> is not an accepted format.</para>

	<para><constant>GL_INVALID_VALUE</constant> is generated if 
	<parameter>width</parameter> or <parameter>height</parameter> is less than zero
	or greater than <constant>GL_MAX_RENDERBUFFER_SIZE</constant>.</para>

	<para><constant>GL_OUT_OF_MEMORY</constant> is generated if the implementation is
	unable to create a data store with the requested 
	<parameter>width</parameter> and <parameter>height</parameter>.</para>

	<para><constant>GL_INVALID_OPERATION</constant> is generated if the reserved
	renderbuffer object name 0 is bound.</para>
    </refsect1>
    <refsect1 id="associatedgets"><title>Associated Gets</title>
	<para><citerefentry><refentrytitle>glGetRenderbufferParameteriv</refentrytitle></citerefentry></para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
	<para><citerefentry><refentrytitle>glBindRenderbuffer</refentrytitle></citerefentry>,
	<citerefentry><refentrytitle>glDeleteRenderbuffers</refentrytitle></citerefentry>,
	<citerefentry><refentrytitle>glFramebufferRenderbuffer</refentrytitle></citerefentry>,
	<citerefentry><refentrytitle>glGenRenderbuffers</refentrytitle></citerefentry>,
	<citerefentry><refentrytitle>glGetRenderbufferParameteriv</refentrytitle></citerefentry>,
	<citerefentry><refentrytitle>glIsRenderbuffer</refentrytitle></citerefentry></para>
    </refsect1>
    <refsect1 id="copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"></trademark> 2008 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>
