WebGL
Khronos
 

WebGL EXT_sRGB Extension Specification

Name

EXT_sRGB

Contact

WebGL working group (public_webgl 'at' khronos.org)

Contributors

Florian Boesch (pyalot 'at' gmail.com)

Members of the WebGL working group

Version

Last modified date: July 15, 2014
Revision: 4

Number

WebGL extension #17

Dependencies

Written against the WebGL API 1.0 specification.

Promoted to core and no longer available as an extension in WebGL API 2.0 specification.

The following behavioral changes apply in the core spec:

Overview

This extension exposes the EXT_sRGB functionality to WebGL.

There are no WebGL-specific behavioral changes.

Consult the above extension for documentation, issues and new functions and enumerants.

When this extension is enabled:

IDL

    [NoInterfaceObject]
    interface EXT_sRGB {
      const GLenum SRGB_EXT                                     = 0x8C40;
      const GLenum SRGB_ALPHA_EXT                               = 0x8C42;
      const GLenum SRGB8_ALPHA8_EXT                             = 0x8C43;
      const GLenum FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT    = 0x8210;
    };
  

New Tokens

texImage2D(GLenum format, GLenum internalformat)
Accepted by the format and internalformat parameters: SRGB_EXT and SRGB_ALPHA_EXT
texSubImage2D(GLenum format)
Accepted by the format parameter: SRGB_EXT and SRGB_ALPHA_EXT
renderbufferStorage(GLenum internalformat)
Accepted by the internalformat parameter: SRGB_ALPHA8_EXT
getFramebufferAttachmentParameter(GLenum pname)
Accepted by the pname parameter: FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT

Sample Code

        var ext = gl.getExtension('EXT_sRGB');
        var texture = gl.createTexture();
        gl.bindTexture(gl.TEXTURE_2D, texture);
        texImage2D(gl.TEXTURE_2D, 0, ext.SRGB_EXT, 256, 256, 0, ext.SRGB_EXT, gl.UNSIGNED_BYTE, data);
    

Revision History

Revision 1, 2012/12/16

Revision 2, 2013/01/26

Revision 3, 2014/05/13

Revision 4, 2014/07/15