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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 xml:base="" id="eglQueryAPI">
<refentryinfo>
<copyright>
<year>2003-2014</year>
<holder>The Khronos Group Inc.</holder>
</copyright>
</refentryinfo>
<refmeta>
<refentrytitle>eglQueryAPI</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>eglQueryAPI</refname>
<refpurpose>Query the current rendering API</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>EGLenum <function>eglQueryAPI</function></funcdef>
<void/>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="description"><title>Description</title>
<para>
<function>eglQueryAPI</function> returns the value of the
current rendering API for EGL in the thread it is called
from. The current rendering API is set by
<citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>,
and affects the behavior of other EGL commands.
</para>
<para>
The value returned will be one of the valid
<parameter>api</parameter> parameters to
<citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>, or
<constant>EGL_NONE</constant>.
</para>
</refsect1>
<refsect1 id="notes"><title>Notes</title>
<para>
<function>eglQueryAPI</function> is supported only if the
EGL version is 1.2 or greater.
</para>
<para>
The initial value of the current rendering API is
<constant>EGL_OPENGL_ES_API</constant> unless OpenGL ES is
not supported by an implementation, in which case the
initial value is <constant>EGL_NONE</constant> (however,
<constant>EGL_NONE</constant> is not a valid
<parameter>api</parameter> parameter to
<function>eglQueryAPI</function>).
</para>
<para>
The current rendering API can be changed by calling
<citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>.
</para>
</refsect1>
<refsect1 id="errors"><title>Errors</title>
<para>
None.
</para>
</refsect1>
<refsect1 id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglCreateContext</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglGetCurrentContext</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglGetCurrentDisplay</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglGetCurrentSurface</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglMakeCurrent</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglWaitClient</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglWaitNative</refentrytitle></citerefentry>
</para>
</refsect1>
<refsect3 id="Copyright"><title></title>
<!-- Content included from copyright.inc.xsl -->
<imageobject>
<imagedata fileref="KhronosLogo.jpg" format="jpg" />
</imageobject>
<para />
</refsect3>
</refentry>
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