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<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
<!-- Converted by db4-upgrade version 1.1 -->
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glIsProgram">
<info>
<copyright>
<year>2003-2005</year>
<holder>3Dlabs Inc. Ltd.</holder>
</copyright>
<copyright>
<year>2010-2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glIsProgram</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glIsProgram</refname>
<refpurpose>Determines if a name corresponds to a program object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>GLboolean <function>glIsProgram</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>program</parameter></term>
<listitem>
<para>Specifies a potential program object.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para><function>glIsProgram</function> returns
<constant>GL_TRUE</constant> if <parameter>program</parameter>
is the name of a program object previously created with
<citerefentry><refentrytitle>glCreateProgram</refentrytitle></citerefentry>
and not yet deleted with <citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>.
If <parameter>program</parameter> is zero or a non-zero value that
is not the name of a program object, or if an error occurs,
<function>glIsProgram</function> returns <constant>GL_FALSE</constant>.</para>
</refsect1>
<refsect1 xml:id="notes"><title>Notes</title>
<para>No error is generated if <parameter>program</parameter> is
not a valid program object name.</para>
<para>A program object marked for deletion with <citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>
but still in use as part of current rendering state is still considered
a program object and <function>glIsProgram</function> will return <constant>GL_TRUE</constant>.</para>
</refsect1>
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
<para><citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>
with the argument <constant>GL_CURRENT_PROGRAM</constant></para>
<para><citerefentry><refentrytitle>glGetActiveAttrib</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the index of
an active attribute variable</para>
<para><citerefentry><refentrytitle>glGetActiveUniform</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the index of
an active uniform variable</para>
<para><citerefentry><refentrytitle>glGetAttachedShaders</refentrytitle></citerefentry>
with argument <parameter>program</parameter></para>
<para><citerefentry><refentrytitle>glGetAttribLocation</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the name of an
attribute variable</para>
<para><citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the parameter
to be queried</para>
<para><citerefentry><refentrytitle>glGetProgramInfoLog</refentrytitle></citerefentry>
with argument <parameter>program</parameter></para>
<para><citerefentry><refentrytitle>glGetUniform</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the location
of a uniform variable</para>
<para><citerefentry><refentrytitle>glGetUniformLocation</refentrytitle></citerefentry>
with arguments <parameter>program</parameter> and the name of a
uniform variable</para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glIsProgram</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='20']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para><citerefentry><refentrytitle>glAttachShader</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glBindAttribLocation</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glCreateProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDetachShader</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glUniform</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glUseProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glValidateProgram</refentrytitle></citerefentry></para>
</refsect1>
<refsect1 xml:id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
Copyright <trademark class="copyright"/> 2010-2014 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.
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
</para>
</refsect1>
</refentry>
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