The EXT_sRGB extension is part of the WebGL API and adds sRGB support to textures and framebuffer objects.

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 constants in WebGL2 are: gl.SRGB, gl.SRGB8, gl.SRBG8_ALPHA8 and gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING.


This extension exposes the following constants, which can be used in the texImage2D(), texSubImage2D(), renderbufferStorage() and getFramebufferAttachmentParameter() methods.

Unsized sRGB format that leaves the precision up to the driver.
Unsized sRGB format with unsized alpha component.
Sized (8-bit) sRGB and alpha formats.
Returns the framebuffer color encoding (gl.LINEAR or ext.SRGB_EXT).


var ext = gl.getExtension('EXT_sRGB');
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.SRGB_EXT, 512, 521, 0, 
              ext.SRGB_EXT, gl.UNSIGNED_BYTE, image);  


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

Browser compatibility

FeatureChromeFirefoxEdgeInternet ExplorerOperaSafari
Basic Support?28.0(No)???
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support??(No)????

See also

Document Tags and Contributors

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