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"text/html; charset=UTF-8" /><title>glIsQuery
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glIsQuery"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glIsQuery — determine if a name corresponds to a query 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">GLboolean
<b class=
"fsfunc">glIsQuery
</b>(
</code></td><td>GLuint
</td><td><var class=
"pdparam">id
</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>id
</code></em></span></dt><dd><p>
4 Specifies a value that may be the name of a query object.
5 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
6 <code class=
"function">glIsQuery
</code> returns
<code class=
"constant">GL_TRUE
</code> if
<em class=
"parameter"><code>id
</code></em> is currently the name of a query object.
7 If
<em class=
"parameter"><code>id
</code></em> is zero, or is a non-zero value that is not currently the
8 name of a query object, or if an error occurs,
<code class=
"function">glIsQuery
</code> returns
<code class=
"constant">GL_FALSE
</code>.
10 A name returned by
<a class=
"citerefentry" href=
"glGenQueries.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGenQueries
</span></span></a>, but not yet associated with a query object
11 by calling
<a class=
"citerefentry" href=
"glBeginQuery.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBeginQuery
</span></span></a>, is not the name of a query object.
12 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
13 <code class=
"function">glIsQuery
</code> is available only if the GL version is
1.5 or greater.
14 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
15 <code class=
"constant">GL_INVALID_OPERATION
</code> is generated if
<code class=
"function">glIsQuery
</code> is executed
16 between the execution of
<a class=
"citerefentry" href=
"glBegin.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBegin
</span></span></a> and the corresponding
17 execution of
<a class=
"citerefentry" href=
"glEnd.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnd
</span></span></a>.
18 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
19 <a class=
"citerefentry" href=
"glBeginQuery.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBeginQuery
</span></span></a>,
20 <a class=
"citerefentry" href=
"glDeleteQueries.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDeleteQueries
</span></span></a>,
21 <a class=
"citerefentry" href=
"glEndQuery.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEndQuery
</span></span></a>,
22 <a class=
"citerefentry" href=
"glGenQueries.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGenQueries
</span></span></a>
23 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
24 Copyright
<span class=
"trademark"></span>©
2005 Addison-Wesley.
25 This material may be distributed subject to the terms and conditions set forth in
26 the Open Publication License, v
1.0,
8 June
1999.
27 <a class=
"ulink" href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
28 </p></div></div></body></html>