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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>glFlushMappedBufferRange - OpenGL 3.3 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="glFlushMappedBufferRange"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glFlushMappedBufferRange — indicate modifications to a range of a mapped buffer</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">glFlushMappedBufferRange</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLintptr  </td><td><var class="pdparam">offset</var>, </td></tr><tr><td> </td><td>GLsizeiptr  </td><td><var class="pdparam">length</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>
                    Specifies the target of the flush operation. <em class="parameter"><code>target</code></em> must be <code class="constant">GL_ARRAY_BUFFER</code>,
                    <code class="constant">GL_COPY_READ_BUFFER</code>, <code class="constant">GL_COPY_WRITE_BUFFER</code>, <code class="constant">GL_ELEMENT_ARRAY_BUFFER</code>,
                    <code class="constant">GL_PIXEL_PACK_BUFFER</code>, <code class="constant">GL_PIXEL_UNPACK_BUFFER</code>, <code class="constant">GL_TEXTURE_BUFFER</code>,
                    <code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER</code>, or <code class="constant">GL_UNIFORM_BUFFER</code>.
                </p></dd><dt><span class="term"><em class="parameter"><code>offset</code></em></span></dt><dd><p>
                    Specifies the start of the buffer subrange, in basic machine units.
                </p></dd><dt><span class="term"><em class="parameter"><code>length</code></em></span></dt><dd><p>
                    Specifies the length of the buffer subrange, in basic machine units.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glFlushMappedBufferRange</code> indicates that modifications have been made to a range of a mapped buffer.
            The buffer must previously have been mapped with the <code class="constant">GL_MAP_FLUSH_EXPLICIT_BIT</code> flag. <em class="parameter"><code>offset</code></em>
            and <em class="parameter"><code>length</code></em> indicate the modified subrange of the mapping, in basic units. The specified subrange to flush
            is relative to the start of the currently mapped range of the buffer. <code class="function">glFlushMappedBufferRange</code> may be called
            multiple times to indicate distinct subranges of the mapping which require flushing.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>offset</code></em> or <em class="parameter"><code>length</code></em>
            is negative, or if <em class="parameter"><code>offset</code></em> + <em class="parameter"><code>length</code></em> exceeds the size of the mapping.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if zero is bound to <em class="parameter"><code>target</code></em>.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if the buffer bound to <em class="parameter"><code>target</code></em> is not
            mapped, or is mapped without the <code class="constant">GL_MAP_FLUSH_EXPLICIT_BIT</code> flag.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="glMapBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glMapBufferRange</span></span></a>,
            <a href="glMapBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glMapBuffer</span></span></a>,
            <a href="glUnmapBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glUnmapBuffer</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>© 2010 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>
