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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:base="" xml:id="eglWaitGL">
<info>
<copyright>
<year>2003-2014</year>
<holder>The Khronos Group Inc.</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>eglWaitGL</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>eglWaitGL</refname>
<refpurpose>
Complete GL execution prior to subsequent native rendering
calls
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>EGLBoolean <function>eglWaitGL</function></funcdef>
<void/>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="description"><title>Description</title>
<para>
All OpenGL ES rendering calls for the currently bound OpenGL
ES context made prior to <function>eglWaitGL</function> are
guaranteed to be executed before native rendering calls made
after <function>eglWaitGL</function>. The same result can be
achieved using
<citerefentry><refentrytitle>glFinish</refentrytitle></citerefentry>.
</para>
<para>
<function>eglWaitGL</function> is ignored if there is no
current EGL rendering context for OpenGL ES.
</para>
</refsect1>
<refsect1 xml:id="notes"><title>Notes</title>
<para>
<function>eglWaitClient</function> is supported only if the
EGL version is 1.2 or greater.
</para>
<para>
<function>eglWaitClient</function> is a generalized version
of <function>eglWaitGL</function>, supporting multiple
client APIs. For backwards compatibility,
<function>eglWaitGL</function> continues to be supported and
is equivalent to the series of commands
</para>
<programlisting>
EGLenum api = <function>eglQueryAPI</function>();
<function>eglBindAPI</function>(<constant>EGL_OPENGL_ES_API</constant>);
<function>eglWaitClient</function>();
<function>eglBindAPI</function>(api);
</programlisting>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para>
<constant>EGL_FALSE</constant> is returned if
<function>eglWaitGL</function> fails,
<constant>EGL_TRUE</constant> otherwise.
</para>
<para>
<constant>EGL_BAD_CURRENT_SURFACE</constant> is generated if
the surface associated with the current context has a native
window or pixmap, and that window or pixmap is no longer
valid.
</para>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glFinish</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>eglWaitClient</refentrytitle></citerefentry>
<citerefentry><refentrytitle>eglWaitNative</refentrytitle></citerefentry>
</para>
</refsect1>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="copyright.xml"/>
</refentry>
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