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.SRBG8_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, 521, 0, 
              ext.SRGB_EXT, gl.UNSIGNED_BYTE, image);  

Specifications

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

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari Servo
Basic Support??28.0????
Feature Android Chrome for Android Edge Mobile Firefox for Android IE Mobile Opera Mobile Safari Mobile
Basic Support???????

See also

Document Tags and Contributors

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