extension.xml - mozsearch

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<?xml version="1.0" encoding="UTF-8"?>

<ratified href="EXT_frag_depth/">

  <name>EXT_frag_depth</name>

  <contact> <a href="https://www.khronos.org/webgl/public-mailing-list/">WebGL

  working group</a> (public_webgl 'at' khronos.org) </contact>

  <contributors>

    <contributor>Florian Boesch (pyalot 'at' gmail.com)</contributor>

    <contributor>Members of the WebGL working group</contributor>

  </contributors>

  <number>16</number>

  <depends>

    <api version="1.0"/>

    <core version="2.0">

      <glsl version="300 es"/>

    </core>

  </depends>

  <overview>

    <mirrors href="http://www.khronos.org/registry/gles/extensions/EXT/EXT_frag_depth.txt"

             name="EXT_frag_depth">

    </mirrors>

    <features>

      <feature>

            Adds the ability to set the depth value of a fragment from

            within the fragment shader with the built-in output variable gl_FragDepthEXT.

      </feature>

      <glsl extname="GL_EXT_frag_depth">

        <stage type="fragment"/>

        <output name="gl_FragDepthEXT" type="float" />

      </glsl>

    </features>

  </overview>

  <idl xml:space="preserve">

    [NoInterfaceObject]

    interface EXT_frag_depth {

};

  </idl>

  <samplecode xml:space="preserve">

    <pre>

    void main(){

        gl_FragColor = vec4(1.0, 0.0, 1.0, 1.0);

        gl_FragDepthEXT = 0.5;

    </pre>

  </samplecode>

  <history>

    <revision date="2012/11/22">

      <change>Initial revision.</change>

    </revision>

    <revision date="2012/12/17">

      <change>Moved to draft.</change>

    </revision>

    <revision date="2014/05/13">

      <change>Moved to community approved.</change>

    </revision>

    <revision date="2014/07/15">

      <change>Added NoInterfaceObject extended attribute.</change>

    </revision>

    <revision date="2015/05/29">

      <change>Ratified by Khronos Board of Promoters.</change>

    </revision>

  </history>

</ratified>