78 lines
3.6 KiB
XML
78 lines
3.6 KiB
XML
<?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="glIsQuery">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>2005</year>
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<holder>Sams Publishing</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>glIsQuery</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glIsQuery</refname>
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<refpurpose>determine if a name corresponds to a query 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>glIsQuery</function></funcdef>
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<paramdef>GLuint <parameter>id</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>id</parameter></term>
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<listitem>
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<para>
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Specifies a value that may be the name of a query object.
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</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>
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<function>glIsQuery</function> returns <constant>GL_TRUE</constant> if <parameter>id</parameter> is currently the name of a query object.
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If <parameter>id</parameter> is zero, or is a non-zero value that is not currently the
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name of a query object, or if an error occurs, <function>glIsQuery</function> returns <constant>GL_FALSE</constant>.
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</para>
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<para>
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A name returned by <citerefentry><refentrytitle>glGenQueries</refentrytitle></citerefentry>, but not yet associated with a query object
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by calling <citerefentry><refentrytitle>glBeginQuery</refentrytitle></citerefentry>, is not the name of a query object.
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</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>
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<function>glIsQuery</function> is available only if the GL version is 1.5 or greater.
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</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>
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<constant>GL_INVALID_OPERATION</constant> is generated if <function>glIsQuery</function> is executed
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between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the corresponding
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execution of <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glBeginQuery</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteQueries</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glEndQuery</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGenQueries</refentrytitle></citerefentry>
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</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> 2005 Addison-Wesley.
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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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