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Name
EXT_texture_sRGB_R8
Name Strings
GL_EXT_texture_sRGB_R8
Contributors
Sam Holmes
Maurice Ribble
Daniel Koch
Tobias Hector
Jan-Harald Fredriksen
Sourav Parmar
Contact
Maurice Ribble (mribble 'at' qti.qualcomm.com)
Status
Complete.
Version
Last Modified Date: November 30, 2018
Revision: 5
Number
OpenGL ES Extension #221
OpenGL Extension #534
Dependencies
OpenGL ES 3.0 or OpenGL 1.2 is required.
This extension is written against the OpenGL ES 3.1 and
OpenGL 4.6 (Core Profile) specifications.
This extension interacts with ARB_texture_view.
This extension interacts with EXT_texture_view.
This extension interacts with OES_texture_view.
This extension interacts with ARB_direct_state_access.
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 TexImage3D, TexImage2D,
TexImage1D, TexStorage3D, TexStorage2D, TexStorage1D, TextureStorage3D,
TextureStorage2D, and TextureStorage1D:
SR8_EXT 0x8FBD
Additions to Chapter 8 of the OpenGL ES 3.1 Specification [GL 4.6 core
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 [8.12 in the GL 4.6 core
profile] (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 8.22 in the GL 4.6 core profile
(Compatible internal formats for TextureView):
Class Internal formats
--------------- ----------------
VIEW_CLASS_8_BITS SR8_EXT
The following table entry is added to Table 8.24 [8.24 in the GL 4.6 core
profile] (sRGB texture internal formats):
Internal Format
---------------
SR8_EXT
Dependencies on OpenGL
If OpenGL is not supported, ignore all references to 1D textures,
including TexImage1D, TexStorage1D, and TextureStorage1D.
Dependencies on OpenGL 4.5 and ARB_direct_state_access
If neither OpenGL 4.5 nor ARB_direct_state_access are supported,
ignore all references to TextureStorage3D, TextureStorage2D, and
TextureStorage1D.
Dependencies on ARB_texture_view
If ARB_texture_view is supported, add SR8_EXT to the Internal formats
column of the VIEW_CLASS_8_BITS row in Table 3.X.2.
Dependencies on EXT_texture_view
If EXT_texture_view is supported, add SR8_EXT to the Internal formats
column of the VIEW_CLASS_8_BITS row in Table 8.X.2.
Dependencies on OES_texture_view
If OES_texture_view is supported, add SR8_EXT to the Internal formats
column of the VIEW_CLASS_8_BITS row in Table 8.X.2.
Errors
None
New State
None
Revision History
Rev Date Author Description
---- ---------- -------------- ---------------------------------
1 1/9/2015 Sam Holmes Initial revision.
2 1/21/2015 Maurice Ribble Cleanup minor issues
3 1/22/2015 Tobias Hector Removed "GL_" prefix and somewhat confusing version language.
4 1/28/2015 Sam Holmes Remove redundant specification of errors and clean up internal format name.
5 11/30/2018 Sourav Parmar Add GL interactions and register for GL.