Name

    EXT_texture_sRGB_R8

Name Strings

    GL_EXT_texture_sRGB_R8

Contributors

    Sam Holmes
    Maurice Ribble
    Daniel Koch
    Tobias Hector
    Jan-Harald Fredriksen

Contact

    Maurice Ribble (mribble 'at' qti.qualcomm.com)

Status

    Complete.

Version

    Last Modified Date: January 28, 2015
    Revision: #4.0

Number

    OpenGL ES Extension #221

Dependencies

    OpenGL ES 3.0 is required.

    This extension is written against the OpenGL ES 3.1 specification.

Overview

    This extension introduces SR8_EXT as an acceptable internal format.
    This allows efficient sRGB sampling for source images stored as a separate
    texture per channel.

New Procedures and Functions

    None

New Tokens

    Accepted by the <internalformat> parameters of TexImage2D, TexImage3D, 
    TexStorage2D and TexStorage3D:

        SR8_EXT    0x8FBD

Additions to Chapter 8 of the OpenGL ES 3.1 Specification (Textures and
Samplers)

    The following table entry is added to Table 8.2 (Valid combinations of
    format, type and sized internalformat):

        Format    Type             External Bytes per Pixel    Internal Format
        ------    ----             ------------------------    ---------------
        RED       UNSIGNED_BYTE    1                           SR8_EXT

    The following table entry is added to Table 8.13 (Correspondence of sized
    internal color formats to base internal formats):

        Sized Internal Format    Base Internal Format    R    G    B    A    S    CR    TF    Req. rend.    Req. tex.
        ---------------------    --------------------    -    -    -    -    -    --    --    ----------    ---------
        SR8_EXT                  RED                     8                              X                      X

    The following table entry is added to Table 8.24 (sRGB texture internal
    formats):

        Internal Format
        ---------------
        SR8_EXT


Errors

    None

New State

    None

Revision History

    #01    1/9/2015    Sam Holmes      Initial revision.
    #02    1/21/2015   Maurice Ribble  Cleanup minor issues
    #03    1/22/2015   Tobias Hector   Removed "GL_" prefix and somewhat confusing version language.
    #04    1/28/2015   Sam Holmes      Remove redundant specification of errors and clean up internal format name.