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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
.
Constants
ext.HALF_FLOAT_OES
- Half floating-point type (16-bit).
Extended methods
This extension extends WebGLRenderingContext.texImage2D()
and WebGLRenderingContext.texSubImage2D()
:
- The
type
parameter now acceptsext.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.
Examples
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);
Specifications
Specification | Status | Comment |
---|---|---|
OES_texture_half_float 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 | ? | ? | ? | ? | ? | ? |