WebGL OES_texture_half_float Khronos Ratified Extension Specification

Name

OES_texture_half_float

WebGL working group (public_webgl 'at' khronos.org)

Members of the WebGL working group

Last modified date: May 15, 2013
Revision: 5

WebGL extension #2

Written against the WebGL API 1.0 specification.

This extension exposes the OES_texture_half_float functionality to WebGL.

The following WebGL-specific behavioral changes apply:

Consult the above extension for documentation, issues and new functions and enumerants.

When this extension is enabled:

The texImage2D and texSubImage2D entry points taking ArrayBufferView are extended to accept null with the pixel type HALF_FLOAT_OES.
The texImage2D and texSubImage2D entry points taking ImageData, HTMLImageElement, HTMLCanvasElement and HTMLVideoElement are extended to accept the pixel type HALF_FLOAT_OES.
Implementations supporting float rendering via this extension will implicitly enable the OES_color_buffer_half_float extension and follow its requirements. This ensures correct behavior when a texture with pixel type HALF_FLOAT_OES is attached to an FBO. Although this feature has historically been allowed, new implementations should not implicitly support float rendering and applications should be modified to explicitly enable OES_color_buffer_half_float.

interface OES_texture_half_float {
  const GLenum HALF_FLOAT_OES = 0x8D61;
};

Revision 1, 2010/11/29

Revision 2, 2011/09/12

Added similar text about texImage2D and texSubImage2D as in OES_texture_float spec.
Added optional ability to use a HALF_FLOAT_OES type texture as an FBO's color attachment.

Revision 3, 2012/01/03

Revision 4, 2012/12/04

Specify that implementations supporting HALF_FLOAT_OES color attachments implicitly enable EXT_color_buffer_half_float.

Revision 5, 2013/05/15