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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>
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