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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
<refentry id="glProgramParameter">
<refentryinfo>
<copyright>
<year>2010-2013</year>
<holder>Khronos Group</holder>
</copyright>
</refentryinfo>
<refmeta>
<refentrytitle>glProgramParameter</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glProgramParameter</refname>
<refpurpose>specify a parameter for a program object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glProgramParameteri</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLenum <parameter>pname</parameter></paramdef>
<paramdef>GLint <parameter>value</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>program</parameter></term>
<listitem>
<para>
Specifies the name of a program object whose parameter to modify.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>pname</parameter></term>
<listitem>
<para>
Specifies the name of the parameter to modify.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
Specifies the new value of the parameter specified by <parameter>pname</parameter> for <parameter>program</parameter>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="description"><title>Description</title>
<para>
<function>glProgramParameter</function> specifies a new value for the parameter nameed by
<parameter>pname</parameter> for the program object <parameter>program</parameter>.
</para>
<para>
If <parameter>pname</parameter> is <constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant>,
<parameter>value</parameter> should be <constant>GL_FALSE</constant> or <constant>GL_TRUE</constant>
to indicate to the implementation the intention of the application to retrieve the program's
binary representation with <citerefentry><refentrytitle>glGetProgramBinary</refentrytitle></citerefentry>.
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 <constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant>
for the program to <constant>GL_TRUE</constant> before calling
<citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>, and
using the program at run-time if the binary is to be retrieved later.
</para>
<para>
If <parameter>pname</parameter> is <constant>GL_PROGRAM_SEPARABLE</constant>, <parameter>value</parameter>
must be <constant>GL_TRUE</constant> or <constant>GL_FALSE</constant> and indicates whether
<parameter>program</parameter> can be bound to individual pipeline stages via
<citerefentry><refentrytitle>glUseProgramStages</refentrytitle></citerefentry>. A program's
<constant>GL_PROGRAM_SEPARABLE</constant> parameter must be set to <constant>GL_TRUE</constant>
<emphasis>before</emphasis> <citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>
is called in order for it to be usable with a program pipeline object. The initial state of
<constant>GL_PROGRAM_SEPARABLE</constant> is <constant>GL_FALSE</constant>.
</para>
</refsect1>
<refsect1 id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if <parameter>program</parameter> is not the
name of an existing program object.
</para>
<para>
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>pname</parameter> is not one
of the accepted values.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>value</parameter> is not a valid
value for the parameter named by <parameter>pname</parameter>.
</para>
</refsect1>
<refsect1 id="associatedgets"><title>Associated Gets</title>
<para>
<citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>.
</para>
</refsect1>
<refsect1 id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glGetProgramBinary</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glProgramBinary</refentrytitle></citerefentry>
</para>
</refsect1>
<refsect1 id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"></trademark> 2010-2013 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.
<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
</para>
</refsect1>
</refentry>
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