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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
3 | <!-- saved from url=(0013)about:internet --> | |
4 | <?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>glQueryCounter - 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="glQueryCounter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glQueryCounter — record the GL time into a query object after all previous commands have reached the GL server but have not yet necessarily executed.</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">glQueryCounter</b>(</code></td><td>GLuint </td><td><var class="pdparam">id</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">target</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> | |
5 | Specify the name of a query object into which to record the GL time. | |
6 | </p></dd><dt><span class="term"><em class="parameter"><code>target</code></em></span></dt><dd><p> | |
7 | Specify the counter to query. <em class="parameter"><code>target</code></em> must be <code class="constant">GL_TIMESTAMP</code>. | |
8 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
9 | <code class="function">glQueryCounter</code> causes the GL to record the current time into the query object named <em class="parameter"><code>id</code></em>. | |
10 | <em class="parameter"><code>target</code></em> must be <code class="constant">GL_TIMESTAMP</code>. The time is recorded after all previous commands on the | |
11 | GL client and server state and the framebuffer have been fully realized. When the time is recorded, the query result for that object | |
12 | is marked available. <code class="function">glQueryCounter</code> timer queries can be used within a <a href="glBeginQuery.xml"><span class="citerefentry"><span class="refentrytitle">glBeginQuery</span></span></a> / | |
13 | <a href="glEndQuery.xml"><span class="citerefentry"><span class="refentrytitle">glEndQuery</span></span></a> block where the target is <code class="constant">GL_TIME_ELAPSED</code> and it does | |
14 | not affect the result of that query object. | |
15 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
16 | <code class="function">glQueryCounter</code> is available only if the GL version is 3.3 or higher. | |
17 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
18 | <code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>id</code></em> is the name | |
19 | of a query object that is already in use within a <a href="glBeginQuery.xml"><span class="citerefentry"><span class="refentrytitle">glBeginQuery</span></span></a> / | |
20 | <a href="glEndQuery.xml"><span class="citerefentry"><span class="refentrytitle">glEndQuery</span></span></a> block. | |
21 | </p><p> | |
22 | <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>id</code></em> is not the name of a query object returned | |
23 | from a previous call to <a href="glGenQueries.xml"><span class="citerefentry"><span class="refentrytitle">glGenQueries</span></span></a>. | |
24 | </p><p> | |
25 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not <code class="constant">GL_TIMESTAMP</code>. | |
26 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
27 | <a href="glGenQueries.xml"><span class="citerefentry"><span class="refentrytitle">glGenQueries</span></span></a>, | |
28 | <a href="glBeginQuery.xml"><span class="citerefentry"><span class="refentrytitle">glBeginQuery</span></span></a>, | |
29 | <a href="glEndQuery.xml"><span class="citerefentry"><span class="refentrytitle">glEndQuery</span></span></a>, | |
30 | <a href="glDeleteQueries.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteQueries</span></span></a>, | |
31 | <a href="glGetQueryObject.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryObject</span></span></a>, | |
32 | <a href="glGetQueryiv.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryiv</span></span></a>, | |
33 | <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> | |
34 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
35 | Copyright <span class="trademark"></span>© 2010 Khronos Group. | |
36 | This material may be distributed subject to the terms and conditions set forth in | |
37 | the Open Publication License, v 1.0, 8 June 1999. | |
38 | <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>. | |
39 | </p></div></div></body></html> |