The OES_texture_half_float extension is part of the WebGL API and adds texture formats with 16- (aka half float) and 32-bit floating-point components.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: This extension is only available to WebGL1 contexts. In WebGL2, the functionality of this extension is available on the WebGL2 context by default. The constant in WebGL2 is gl.HALF_FLOAT.


Half floating-point type (16-bit).

Extended methods

This extension extends WebGLRenderingContext.texImage2D() and WebGLRenderingContext.texSubImage2D():

  • The type parameter now accepts ext.HALF_FLOAT_OES.

Limitation: Linear filtering

Linear filtering on half floating-point textures is not allowed with this extension. If you set the magnification or minification filter in the WebGLRenderingContext.texParameter() method to one of gl.LINEAR, gl.LINEAR_MIPMAP_NEAREST, gl.NEAREST_MIPMAP_LINEAR, or gl.LINEAR_MIPMAP_LINEAR, and use half floating-point textures, the texture will be marked as incomplete.

To use linear filtering on half floating-point textures, enable the OES_texture_half_float_linear extension in addition to this extension.

Half floating-point color buffers

This extension implicitly enables the EXT_color_buffer_half_float extension, which allows rendering to 16-bit floating point formats.


var ext = gl.getExtension("OES_texture_half_float");

var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);

gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, ext.HALF_FLOAT_OES, image);  


Specification Status Comment
The definition of 'OES_texture_half_float' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 29.0 (29.0) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,