Web/API/EXT sRGB

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.SRGB8_ALPHA8 and gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING.

Constants

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

ext.SRGB_EXT: Unsized sRGB format that leaves the precision up to the driver.
ext.SRGB_ALPHA_EXT: Unsized sRGB format with unsized alpha component.
ext.SRGB8_ALPHA8_EXT: Sized (8-bit) sRGB and alpha formats.
ext.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT: Returns the framebuffer color encoding (gl.LINEAR or ext.SRGB_EXT).

Examples

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, 512, 0, 
              ext.SRGB_EXT, gl.UNSIGNED_BYTE, image);

Specifications

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

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`EXT_sRGB`	Chrome Full support 40	Edge No support No	Firefox Full support 58 Full support 58 No support 28 — 58 Notes' Notes' Not supported on Windows.	IE No support No	Opera Full support 27	Safari Full support 7	WebView Android Full support 40	Chrome Android Full support 40	Firefox Android ?	Opera Android Full support 27	Safari iOS Full support 7	Samsung Internet Android Full support 4.0

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
See implementation notes.': See implementation notes.