1<?xml version="1.0" encoding="UTF-8"?> 2<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" 3 "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> 4<refentry xml:base="" id="eglQueryAPI"> 5 <refentryinfo> 6 <copyright> 7 <year>2003-2014</year> 8 <holder>The Khronos Group Inc.</holder> 9 </copyright> 10 </refentryinfo> 11 <refmeta> 12 <refentrytitle>eglQueryAPI</refentrytitle> 13 <manvolnum>3G</manvolnum> 14 </refmeta> 15 <refnamediv> 16 <refname>eglQueryAPI</refname> 17 <refpurpose>Query the current rendering API</refpurpose> 18 </refnamediv> 19 <refsynopsisdiv><title>C Specification</title> 20 <funcsynopsis> 21 <funcprototype> 22 <funcdef>EGLenum <function>eglQueryAPI</function></funcdef> 23 <void/> 24 </funcprototype> 25 </funcsynopsis> 26 </refsynopsisdiv> 27 <refsect1 id="description"><title>Description</title> 28 <para> 29 <function>eglQueryAPI</function> returns the value of the 30 current rendering API for EGL in the thread it is called 31 from. The current rendering API is set by 32 <citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>, 33 and affects the behavior of other EGL commands. 34 </para> 35 <para> 36 The value returned will be one of the valid 37 <parameter>api</parameter> parameters to 38 <citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>, or 39 <constant>EGL_NONE</constant>. 40 </para> 41 </refsect1> 42 <refsect1 id="notes"><title>Notes</title> 43 <para> 44 <function>eglQueryAPI</function> is supported only if the 45 EGL version is 1.2 or greater. 46 </para> 47 <para> 48 The initial value of the current rendering API is 49 <constant>EGL_OPENGL_ES_API</constant> unless OpenGL ES is 50 not supported by an implementation, in which case the 51 initial value is <constant>EGL_NONE</constant> (however, 52 <constant>EGL_NONE</constant> is not a valid 53 <parameter>api</parameter> parameter to 54 <function>eglQueryAPI</function>). 55 </para> 56 <para> 57 The current rendering API can be changed by calling 58 <citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>. 59 </para> 60 </refsect1> 61 <refsect1 id="errors"><title>Errors</title> 62 <para> 63 None. 64 </para> 65 </refsect1> 66 <refsect1 id="seealso"><title>See Also</title> 67 <para> 68 <citerefentry><refentrytitle>eglBindAPI</refentrytitle></citerefentry>, 69 <citerefentry><refentrytitle>eglCreateContext</refentrytitle></citerefentry>, 70 <citerefentry><refentrytitle>eglGetCurrentContext</refentrytitle></citerefentry>, 71 <citerefentry><refentrytitle>eglGetCurrentDisplay</refentrytitle></citerefentry>, 72 <citerefentry><refentrytitle>eglGetCurrentSurface</refentrytitle></citerefentry>, 73 <citerefentry><refentrytitle>eglMakeCurrent</refentrytitle></citerefentry>, 74 <citerefentry><refentrytitle>eglWaitClient</refentrytitle></citerefentry>, 75 <citerefentry><refentrytitle>eglWaitNative</refentrytitle></citerefentry> 76 </para> 77 </refsect1> 78 <refsect3 id="Copyright"><title></title> 79 <!-- Content included from copyright.inc.xsl --> 80 <imageobject> 81 <imagedata fileref="KhronosLogo.jpg" format="jpg" /> 82 </imageobject> 83 <para /> 84 </refsect3> 85</refentry> 86
