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EXT_sRGB extension

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.

Note: 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

js

const ext = gl.getExtension("EXT_sRGB");

const 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
WebGL EXT_sRGB Extension Specification

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
EXT_sRGB 40 80 58
28–58Not supported on Windows.
 No 27 9 40 40 28 27 9 4.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/EXT_sRGB