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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=
"glGetBufferParameteriv"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glGetBufferParameteriv — return parameters of a buffer object
</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">glGetBufferParameteriv
</b>(
</code></td><td>GLenum
</td><td><var class=
"pdparam">target
</var>,
</td></tr><tr><td> </td><td>GLenum
</td><td><var class=
"pdparam">value
</var>,
</td></tr><tr><td> </td><td>GLint *
</td><td><var class=
"pdparam">data
</var><code>)
</code>;
</td></tr></table></div><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">void
<b class=
"fsfunc">glGetBufferParameteri64v
</b>(
</code></td><td>GLenum
</td><td><var class=
"pdparam">target
</var>,
</td></tr><tr><td> </td><td>GLenum
</td><td><var class=
"pdparam">value
</var>,
</td></tr><tr><td> </td><td>GLint64 *
</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>
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>value
</code></em></span></dt><dd><p>
21 Specifies the symbolic name of a buffer object parameter.
22 Accepted values are
<code class=
"constant">GL_BUFFER_ACCESS
</code>,
<code class=
"constant">GL_BUFFER_MAPPED
</code>,
23 <code class=
"constant">GL_BUFFER_SIZE
</code>, or
<code class=
"constant">GL_BUFFER_USAGE
</code>.
24 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>data
</code></em></span></dt><dd><p>
25 Returns the requested parameter.
26 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
27 <code class=
"function">glGetBufferParameteriv
</code> returns in
<em class=
"parameter"><code>data
</code></em> a selected parameter of the buffer object
28 specified by
<em class=
"parameter"><code>target
</code></em>.
30 <em class=
"parameter"><code>value
</code></em> names a specific buffer object parameter, as follows:
31 </p><div class=
"variablelist"><dl><dt><span class=
"term"><code class=
"constant">GL_BUFFER_ACCESS
</code></span></dt><dd><p>
32 <em class=
"parameter"><code>params
</code></em> returns the access policy set while mapping the buffer object.
33 The initial value is
<code class=
"constant">GL_READ_WRITE
</code>.
34 </p></dd><dt><span class=
"term"><code class=
"constant">GL_BUFFER_MAPPED
</code></span></dt><dd><p>
35 <em class=
"parameter"><code>params
</code></em> returns a flag indicating whether the buffer object is currently
36 mapped. The initial value is
<code class=
"constant">GL_FALSE
</code>.
37 </p></dd><dt><span class=
"term"><code class=
"constant">GL_BUFFER_SIZE
</code></span></dt><dd><p>
38 <em class=
"parameter"><code>params
</code></em> returns the size of the buffer object, measured in bytes.
39 The initial value is
0.
40 </p></dd><dt><span class=
"term"><code class=
"constant">GL_BUFFER_USAGE
</code></span></dt><dd><p>
41 <em class=
"parameter"><code>params
</code></em> returns the buffer object's usage pattern. The initial value is
42 <code class=
"constant">GL_STATIC_DRAW
</code>.
43 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
44 If an error is generated,
45 no change is made to the contents of
<em class=
"parameter"><code>data
</code></em>.
47 The
<code class=
"constant">GL_ATOMIC_COUNTER_BUFER
</code> target is available only if the GL version is
4.2 or greater.
49 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.
50 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
51 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>target
</code></em> or
<em class=
"parameter"><code>value
</code></em> is not an
54 <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>.
55 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
56 <a href=
"glBindBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBuffer
</span></span></a>,
57 <a href=
"glBufferData.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBufferData
</span></span></a>,
58 <a href=
"glMapBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMapBuffer
</span></span></a>,
59 <a href=
"glUnmapBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glUnmapBuffer
</span></span></a>
60 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
61 Copyright
<span class=
"trademark"></span>©
2005 Addison-Wesley.
62 This material may be distributed subject to the terms and conditions set forth in
63 the Open Publication License, v
1.0,
8 June
1999.
64 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
65 </p></div></div></body></html>