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

<ratified href="OES_texture_half_float/">

  <name>OES_texture_half_float</name>

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

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

  <contributors>

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

  </contributors>

  <number>2</number>

  <depends>

    <api version="1.0"/>

    <removed version="2.0" />

  </depends>

  <overview>

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

             name="OES_texture_half_float">

      <addendum>Optional support for <code>HALF_FLOAT</code> textures as FBO

      attachments.</addendum>

    </mirrors>

    <features>

      <feature> The <code>texImage2D</code> and <code>texSubImage2D</code>

      entry points taking <code>ArrayBufferView</code> are extended to accept

      <code>Uint16Array</code> with the pixel type <code>HALF_FLOAT_OES</code>.

      </feature>

      <feature> The <code>texImage2D</code> and <code>texSubImage2D</code>

      entry points taking <code>ImageData</code>,

      <code>HTMLImageElement</code>, <code>HTMLCanvasElement</code> and

      <code>HTMLVideoElement</code> are extended to accept the pixel type

      <code>HALF_FLOAT_OES</code>. </feature>

      <feature>Upon activation of this extension, implementations supporting

      <a href="../EXT_color_buffer_half_float/">EXT_color_buffer_half_float</a>

      shall implicitly enable it. This requirement maintains the historical

      behavior prior to the differentiation of float renderability from float

      textures, so as to not break existing content.</feature>

    </features>

  </overview>

  <idl xml:space="preserve">

[NoInterfaceObject]

interface OES_texture_half_float {

  const GLenum HALF_FLOAT_OES = 0x8D61;

};

</idl>

  <history>

    <revision date="2010/11/29">

      <change>Initial revision.</change>

    </revision>

    <revision date="2011/09/12">

      <change> Added similar text about <code>texImage2D</code> and

      <code>texSubImage2D</code> as in OES_texture_float spec. </change>

      <change> Added optional ability to use a HALF_FLOAT_OES type texture as

      an FBO's color attachment. </change>

    </revision>

    <revision date="2012/01/03">

      <change>Removed webgl module per changes to Web IDL spec.</change>

    </revision>

    <revision date="2012/12/04">

      <change>Specify that implementations supporting HALF_FLOAT_OES color

      attachments implicitly enable EXT_color_buffer_half_float.</change>

    </revision>

    <revision date="2013/05/15">

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

    </revision>

    <revision date="2014/02/12">

      <change>Allow texture uploads of half-floats via Uint16Arrays.</change>

    </revision>

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

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

    </revision>

    <revision date="2014/09/11">

      <change>Corrected link to EXT_color_buffer_half_float.</change>

    </revision>

    <revision date="2017/09/14">

      <change>Clarify behaviors regarding EXT_color_buffer_half_float.</change>

    </revision>

  </history>

</ratified>