upstream-man-pages/man4/xhtml/glIsTransformFeedback.xml

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   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>glIsTransformFeedback - 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="glIsTransformFeedback"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glIsTransformFeedback — determine if a name corresponds to a transform feedback object</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><p><code class="funcdef">GLboolean <b class="fsfunc">glIsTransformFeedback</b>(</code>GLuint <var class="pdparam">id</var><code>)</code>;</p></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                     Specifies a value that may be the name of a transform feedback object.
   6                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
   7             <code class="function">glIsTransformFeedback</code> returns <code class="constant">GL_TRUE</code> if <em class="parameter"><code>id</code></em> is currently the name of a transform feedback
   8             object. If <em class="parameter"><code>id</code></em> is zero, or if <code class="constant">id</code> is not the name of a transform feedback object, or if an error
   9             occurs, <code class="function">glIsTransformFeedback</code> returns <code class="constant">GL_FALSE</code>. If <em class="parameter"><code>id</code></em> is a name returned by
  10             <a href="glGenTransformFeedbacks.xml"><span class="citerefentry"><span class="refentrytitle">glGenTransformFeedbacks</span></span></a>, but that has not yet been bound through a call to
  11             <a href="glBindTransformFeedback.xml"><span class="citerefentry"><span class="refentrytitle">glBindTransformFeedback</span></span></a>, then the name is not a transform feedback object and <code class="function">glIsTransformFeedback</code>
  12             returns <code class="constant">GL_FALSE</code>.
  13         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  14             <a href="glGenTransformFeedbacks.xml"><span class="citerefentry"><span class="refentrytitle">glGenTransformFeedbacks</span></span></a>,
  15             <a href="glBindTransformFeedback.xml"><span class="citerefentry"><span class="refentrytitle">glBindTransformFeedback</span></span></a>,
  16             <a href="glDeleteTransformFeedbacks.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteTransformFeedbacks</span></span></a>
  17         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  18             Copyright <span class="trademark"></span>© 2010 Khronos Group.
  19             This material may be distributed subject to the terms and conditions set forth in
  20             the Open Publication License, v 1.0, 8 June 1999.
  21             <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
  22         </p></div></div></body></html>