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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=
"glGetBufferPointerv"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glGetBufferPointerv — return the pointer to a mapped buffer object's data store
</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">glGetBufferPointerv
</b>(
</code></td><td>GLenum
</td><td><var class=
"pdparam">target
</var>,
</td></tr><tr><td> </td><td>GLenum
</td><td><var class=
"pdparam">pname
</var>,
</td></tr><tr><td> </td><td>GLvoid **
</td><td><var class=
"pdparam">params
</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>
5 Specifies the target buffer object.
6 The symbolic constant must be
7 <code class=
"constant">GL_ARRAY_BUFFER
</code>,
8 <code class=
"constant">GL_ATOMIC_COUNTER_BUFFER
</code>,
9 <code class=
"constant">GL_COPY_READ_BUFFER
</code>,
10 <code class=
"constant">GL_COPY_WRITE_BUFFER
</code>,
11 <code class=
"constant">GL_DRAW_INDIRECT_BUFFER
</code>,
12 <code class=
"constant">GL_DISPATCH_INDIRECT_BUFFER
</code>,
13 <code class=
"constant">GL_ELEMENT_ARRAY_BUFFER
</code>,
14 <code class=
"constant">GL_PIXEL_PACK_BUFFER
</code>,
15 <code class=
"constant">GL_PIXEL_UNPACK_BUFFER
</code>,
16 <code class=
"constant">GL_SHADER_STORAGE_BUFFER
</code>,
17 <code class=
"constant">GL_TEXTURE_BUFFER
</code>,
18 <code class=
"constant">GL_TRANSFORM_FEEDBACK_BUFFER
</code>, or
19 <code class=
"constant">GL_UNIFORM_BUFFER
</code>.
20 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>pname
</code></em></span></dt><dd><p>
21 Specifies the pointer to be returned. The symbolic constant must be
<code class=
"constant">GL_BUFFER_MAP_POINTER
</code>.
22 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>params
</code></em></span></dt><dd><p>
23 Returns the pointer value specified by
<em class=
"parameter"><code>pname
</code></em>.
24 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
25 <code class=
"function">glGetBufferPointerv
</code> returns pointer information.
<em class=
"parameter"><code>pname
</code></em> is a symbolic constant
26 indicating the pointer to be returned, which must be
<code class=
"constant">GL_BUFFER_MAP_POINTER
</code>, the pointer
27 to which the buffer object's data store is mapped. If the data store is not currently mapped,
<code class=
"constant">NULL
</code> is returned.
28 <em class=
"parameter"><code>params
</code></em> is a pointer to a location in which to place the returned pointer value.
29 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
30 If an error is generated,
31 no change is made to the contents of
<em class=
"parameter"><code>params
</code></em>.
33 The initial value for the pointer is
<code class=
"constant">NULL
</code>.
35 The
<code class=
"constant">GL_ATOMIC_COUNTER_BUFER
</code> target is available only if the GL version is
4.2 or greater.
37 The
<code class=
"constant">GL_DISPATCH_INDIRECT_BUFFER
</code> and
<code class=
"constant">GL_SHADER_STORAGE_BUFFER
</code> targets are available only if the GL version is
4.3 or greater.
38 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
39 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>target
</code></em> or
<em class=
"parameter"><code>pname
</code></em> is not an
42 <code class=
"constant">GL_INVALID_OPERATION
</code> is generated if the reserved buffer object name
0 is bound to
<em class=
"parameter"><code>target
</code></em>.
43 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
44 <a href=
"glBindBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBuffer
</span></span></a>,
45 <a href=
"glMapBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMapBuffer
</span></span></a>
46 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
47 Copyright
<span class=
"trademark"></span>©
2005 Addison-Wesley.
48 This material may be distributed subject to the terms and conditions set forth in
49 the Open Publication License, v
1.0,
8 June
1999.
50 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
51 </p></div></div></body></html>