sdk/docs/man/xhtml/eglQueryString.html

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    <title>eglQueryString</title>
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  <body>
    <div class="refentry">
      <a id="eglQueryString"></a>
      <div class="titlepage"></div>
      <div xmlns="" class="refnamediv">
        <h1>eglQueryString</h1>
        <p>
            return a string describing an <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">EGL</acronym> display connection
        </p>
      </div>
      <div class="refsynopsisdiv">
        <h2>C Specification</h2>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">char const * <strong class="fsfunc">eglQueryString</strong>(</code>
                <td>EGLDisplay  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">display</var>, </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>EGLint  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">name</var><code>)</code></td>
            </tr>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="parameters"></a>
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>display</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                        Specifies the EGL display connection.
                    </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>name</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                        Specifies a symbolic constant, one of
                        <code class="constant">EGL_CLIENT_APIS</code>,
                        <code class="constant">EGL_VENDOR</code>,
                        <code class="constant">EGL_VERSION</code>, or
                        <code class="constant">EGL_EXTENSIONS</code>.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
            <code class="function">eglQueryString</code> returns a pointer to a
            static string describing an EGL display connection.
            <em class="parameter"><code>name</code></em> can be one of the following:
        </p>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <code class="constant">EGL_CLIENT_APIS</code>
              </span>
            </dt>
            <dd>
              <p>
                    Returns a string describing which client rendering
                    APIs are supported. The string contains a
                    space-separate list of API names. The list must
                    include at least one of <code class="code">OpenGL</code>,
                    <code class="code">OpenGL_ES</code>, or <code class="code">OpenVG</code>.
                    These strings correspond respectively to values
                    <code class="constant">EGL_OPENGL_API</code>,
                    <code class="constant">EGL_OPENGL_ES_API</code>, and
                    <code class="constant">EGL_OPENVG_API</code> of the
                    <a class="citerefentry" href="eglBindAPI.html"><span class="citerefentry"><span class="refentrytitle">eglBindAPI</span></span></a>,
                    <em class="parameter"><code>api</code></em> argument.
                </p>
            </dd>
            <dt>
              <span class="term">
                <code class="constant">EGL_VENDOR</code>
              </span>
            </dt>
            <dd>
              <p>
                    Returns the company responsible for this EGL implementation. This
                    name does not change from release to release.
                </p>
            </dd>
            <dt>
              <span class="term">
                <code class="constant">EGL_VERSION</code>
              </span>
            </dt>
            <dd>
              <p>
                    Returns a version or release number.
                    The <code class="constant">EGL_VERSION</code> string is laid out as
                    follows:</p>
              <p>
                    <em class="replaceable"><code>major_version</code></em>.<em class="replaceable"><code>minor_version</code></em>
                    space
                    <em class="replaceable"><code>vendor_specific_info</code></em>
                </p>
            </dd>
            <dt>
              <span class="term">
                <code class="constant">EGL_EXTENSIONS</code>
              </span>
            </dt>
            <dd>
              <p>
                    Returns a space separated list of supported extensions to EGL.
                </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
            <code class="constant">EGL_CLIENT_APIS</code> is supported only if
            the EGL version is 1.2 or greater.
        </p>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
            <code class="constant">NULL</code> is returned on failure.
        </p>
        <p>
            <code class="constant">EGL_BAD_DISPLAY</code> is generated if
            <em class="parameter"><code>display</code></em> is not an EGL display connection.
        </p>
        <p>
            <code class="constant">EGL_NOT_INITIALIZED</code> is generated if
            <em class="parameter"><code>display</code></em> has not been initialized.
        </p>
        <p>
            <code class="constant">EGL_BAD_PARAMETER</code> is generated if
            <em class="parameter"><code>name</code></em> is not an accepted value.
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="eglBindAPI.html"><span class="citerefentry"><span class="refentrytitle">eglBindAPI</span></span></a>,
            <a class="citerefentry" href="eglGetDisplay.html"><span class="citerefentry"><span class="refentrytitle">eglGetDisplay</span></span></a>,
            <a class="citerefentry" href="eglInitialize.html"><span class="citerefentry"><span class="refentrytitle">eglInitialize</span></span></a>
        </p>
      </div>
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