The WEBGL_color_buffer_float extension is part of the WebGL API and adds the ability to render to 32-bit floating-point color buffers.

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

Availability: This extension is available to WebGL 1 contexts only. For WebGL 2, use the EXT_color_buffer_float extension.

The OES_texture_float extension implicitly enables this extension.


RGBA 32-bit floating-point color-renderable format.
ext.RGB32F_EXT ( )
RGB 32-bit floating-point color-renderable format.

Extended methods

This extension extends WebGLRenderingContext.renderbufferStorage():

  • The internalformat parameter now accepts ext.RGBA32F_EXT and ext.RGB32F_EXT ( ).


var ext = gl.getExtension('WEBGL_color_buffer_float');

gl.renderbufferStorage(gl.RENDERBUFFER, ext.RBGA32F_EXT, 256, 256);


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

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
WEBGL_color_buffer_floatChrome Full support YesEdge Full support 17Firefox Full support 30IE ? Opera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesFirefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
RGB32F_EXT constantChrome No support NoEdge No support NoFirefox Full support 30IE ? Opera No support NoSafari ? WebView Android No support NoChrome Android No support NoFirefox Android ? Opera Android No support NoSafari iOS ? Samsung Internet Android No support No


Full support
Full support
No support
No support
Compatibility unknown
Compatibility unknown

See also