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<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glClearBufferData - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glClearBufferData"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glClearBufferData — fill a buffer object's data store with a fixed value</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glClearBufferData</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">internalformat</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">format</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">type</var>, </td></tr><tr><td> </td><td>const void *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>target</code></em></span></dt><dd><p>
                    Specify the target of the operation. <em class="parameter"><code>target</code></em> must be
                    one of the global buffer binding targets.
                </p></dd><dt><span class="term"><em class="parameter"><code>internalformat</code></em></span></dt><dd><p>
                    The internal format with which the data will be stored in the buffer object.
                </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
                    The size, in basic machine units of the range of the data store to fill.
                </p></dd><dt><span class="term"><em class="parameter"><code>format</code></em></span></dt><dd><p>
                    The format of the data in memory addressed by <em class="parameter"><code>data</code></em>.
                </p></dd><dt><span class="term"><em class="parameter"><code>type</code></em></span></dt><dd><p>
                    The type of the data in memory addressed by <em class="parameter"><code>data</code></em>.
                </p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
                    The address of a memory location storing the data to be replicated into the
                    buffer's data store.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glClearBufferData</code> fills the entirety of a buffer object's
            data store with data from client memory. Data, initially supplied in a format
            specified by <em class="parameter"><code>format</code></em> in data type <em class="parameter"><code>type</code></em> is
            read from the memory address given by <em class="parameter"><code>data</code></em> and converted into
            the internal representation given by <em class="parameter"><code>internalforamt</code></em>.
            This converted data is then replicated throughout the buffer object's
            data store.
        </p><p>
            If <em class="parameter"><code>data</code></em> is NULL, then the buffer's data store
            is filled with zeros.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> not one of the generic buffer binding targets.
        </p><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if no buffer is bound to <em class="parameter"><code>target</code></em>.
        </p><p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>internalformat</code></em> is not a sized internal format.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if any part of the buffer's data store is
            mapped with <a href="glMapBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glMapBufferRange</span></span></a> or <a href="glMapBuffer..xml"><span class="citerefentry"><span class="refentrytitle">glMapBuffer.</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="glClearBufferSubData.xml"><span class="citerefentry"><span class="refentrytitle">glClearBufferSubData</span></span></a>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 2011-2012 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.
            <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p></div></div></body></html>
