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<?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>glProgramParameter - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div class="refentry"><a id="glProgramParameter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glProgramParameter — specify a parameter for a program object</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">glProgramParameteri</strong>(</code></td><td>GLuint <var class="pdparam">program</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">value</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>program</code></em></span></dt><dd><p>
Specifies the name of a program object whose parameter to modify.
</p></dd><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>
Specifies the name of the parameter to modify.
</p></dd><dt><span class="term"><em class="parameter"><code>value</code></em></span></dt><dd><p>
Specifies the new value of the parameter specified by <em class="parameter"><code>pname</code></em> for <em class="parameter"><code>program</code></em>.
</p></dd></dl></div></div><div class="refsect1"><a id="description"></a><h2>Description</h2><p>
<code class="function">glProgramParameter</code> specifies a new value for the parameter nameed by
<em class="parameter"><code>pname</code></em> for the program object <em class="parameter"><code>program</code></em>.
</p><p>
If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_PROGRAM_BINARY_RETRIEVABLE_HINT</code>,
<em class="parameter"><code>value</code></em> should be <code class="constant">GL_FALSE</code> or <code class="constant">GL_TRUE</code>
to indicate to the implementation the intention of the application to retrieve the program's
binary representation with <a class="citerefentry" href="glGetProgramBinary.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramBinary</span></span></a>.
The implementation may use this information to store information that may be useful for a future
query of the program's binary. It is recommended to set <code class="constant">GL_PROGRAM_BINARY_RETRIEVABLE_HINT</code>
for the program to <code class="constant">GL_TRUE</code> before calling
<a class="citerefentry" href="glLinkProgram.xml"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>, and
using the program at run-time if the binary is to be retrieved later.
</p><p>
If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_PROGRAM_SEPARABLE</code>, <em class="parameter"><code>value</code></em>
must be <code class="constant">GL_TRUE</code> or <code class="constant">GL_FALSE</code> and indicates whether
<em class="parameter"><code>program</code></em> can be bound to individual pipeline stages via
<a class="citerefentry" href="glUseProgramStages.xml"><span class="citerefentry"><span class="refentrytitle">glUseProgramStages</span></span></a>. A program's
<code class="constant">GL_PROGRAM_SEPARABLE</code> parameter must be set to <code class="constant">GL_TRUE</code>
<span class="emphasis"><em>before</em></span> <a class="citerefentry" href="glLinkProgram.xml"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>
is called in order for it to be usable with a program pipeline object. The initial state of
<code class="constant">GL_PROGRAM_SEPARABLE</code> is <code class="constant">GL_FALSE</code>.
</p></div><div class="refsect1"><a id="errors"></a><h2>Errors</h2><p>
<code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>program</code></em> is not the
name of an existing program object.
</p><p>
<code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>pname</code></em> is not one
of the accepted values.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>value</code></em> is not a valid
value for the parameter named by <em class="parameter"><code>pname</code></em>.
</p></div><div class="refsect1"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
<a class="citerefentry" href="glGetProgram.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>.
</p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
<a class="citerefentry" href="glGetProgram.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>,
<a class="citerefentry" href="glGetProgramBinary.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramBinary</span></span></a>,
<a class="citerefentry" href="glProgramBinary.xml"><span class="citerefentry"><span class="refentrytitle">glProgramBinary</span></span></a>
</p></div><div class="refsect1"><a id="Copyright"></a><h2>Copyright</h2><p>
Copyright <span class="trademark"></span>© 2010 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
<a class="ulink" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
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