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63 lines
2.9 KiB
XML
63 lines
2.9 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="glIsProgram">
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<refmeta>
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<refentrytitle>glIsProgram</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glIsProgram</refname>
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<refpurpose>determine if a name corresponds to a program object</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>GLboolean <function>glIsProgram</function></funcdef>
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<paramdef>GLuint <parameter>program</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>program</parameter></term>
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<listitem>
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<para>Specifies a potential program object.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para><function>glIsProgram</function> returns
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<constant>GL_TRUE</constant> if <parameter>program</parameter>
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is the name of a program object previously created with
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<citerefentry><refentrytitle>glCreateProgram</refentrytitle></citerefentry>
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and not yet deleted with <citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>.
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If <parameter>program</parameter> is zero or a non-zero value that
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is not the name of a program object, or if an error occurs,
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<function>glIsProgram</function> returns <constant>GL_FALSE</constant>.</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>No error is generated if <parameter>program</parameter> is
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not a valid program object name.</para>
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<para>A program object marked for deletion with <citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>
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but still in use as part of current rendering state is still considered
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a program object and <function>glIsProgram</function> will return <constant>GL_TRUE</constant>.</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para><citerefentry><refentrytitle>glCreateProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glUseProgram</refentrytitle></citerefentry></para>
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</refsect1>
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<refsect1 id="copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 2003-2005 3Dlabs Inc. Ltd.
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This material may be distributed subject to the terms and conditions set forth in
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the Open Publication License, v 1.0, 8 June 1999.
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<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
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</para>
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</refsect1>
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</refentry>
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