EXT_texture_format_BGRA8888
Name
EXT_texture_format_BGRA8888
Name Strings
GL_EXT_texture_format_BGRA8888
Notice
Copyright Imagination Technologies Limited, 2005.
Contact
Imagination Technologies
Status
Shipping
Version
1.3, 12 September 2016
Number
OpenGL ES Extension #51
Dependencies
The extension is written against the OpenGLES 1.0 Specification,
which in turn is based OpenGL 1.3. Thus this spec is effectively
written against OpenGL 1.3 but does not address sections explicitly
removed or reduced by OpenGL-ES 1.0.
This extension has interactions with the OpenGL ES 2.0 API.
Overview
This extension provides an additional format and type combination
for use when specifying texture data. The current allowed combinations
are:
Internal Format External Format Type Bytes per Pixel
--------------- --------------- ---- ---------------
RGBA RGBA UNSIGNED_BYTE 4
RGB RGB UNSIGNED_BYTE 3
RGBA RGBA UNSIGNED_SHORT_4_4_4_4 2
RGBA RGBA UNSIGNED_SHORT_5_5_5_1 2
RGB RGB UNSIGNED_SHORT_5_6_5 2
LUMINANCE_ALPHA LUMINANCE_ALPHA UNSIGNED_BYTE 2
LUMINANCE LUMINANCE UNSIGNED_BYTE 1
ALPHA ALPHA UNSIGNED_BYTE 1
This table is extended to include format BGRA_EXT and type UNSIGNED_BYTE:
Internal Format External Format Type Bytes per Pixel
--------------- --------------- ---- ---------------
BGRA_EXT BGRA_EXT UNSIGNED_BYTE 4
RGBA RGBA UNSIGNED_BYTE 4
RGB RGB UNSIGNED_BYTE 3
RGBA RGBA UNSIGNED_SHORT_4_4_4_4 2
RGBA RGBA UNSIGNED_SHORT_5_5_5_1 2
RGB RGB UNSIGNED_SHORT_5_6_5 2
LUMINANCE_ALPHA LUMINANCE_ALPHA UNSIGNED_BYTE 2
LUMINANCE LUMINANCE UNSIGNED_BYTE 1
ALPHA ALPHA UNSIGNED_BYTE 1
This format is renderable in versions of OpenGL ES from 2.0 onwards.
IP Status
Unknown
Issues
None.
New Procedures and Functions
None.
New Tokens
Accepted by the <format> and <internalformat> parameters of TexImage2D
and the <format> parameter of TexSubImage2D:
GL_BGRA_EXT 0x80E1
Additions to Chapter 2 of the OpenGL 1.3 Specification (OpenGL Operation)
None
Additions to Chapter 3 of the OpenGL 1.3 Specification (Rasterization)
None
Additions to Chapter 4 of the OpenGL 1.3 Specification (Per-Fragment Operations and the Frame Buffer)
None
Additions to Chapter 5 of the OpenGL 1.3 Specification (Special Functions)
None
Additions to Chapter 6 of the OpenGL 1.3 Specification (State and State Requests)
None
Additions to the GLX / WGL / AGL Specifications
None
GLX Protocol
None
Errors
None
New State
None
New Implementation Dependent State
None
Interactions with the OpenGL ES 2.0 specification
Add the following entry to Table 4.5: Renderbuffer image formats,
showing their renderable type (color-, depth-, or stencil-renderable)
and the number of bits each format contains for color (R, G, B, A),
depth (D), and stencil (S) components:
|-----------------|------------------|------|------|------|------|------|------|
| Sized | Renderable | R | G | B | A | D | S |
| Internal Format | Type | bits | bits | bits | bits | bits | bits |
|-----------------|------------------|------|------|------|------|------|------|
| GL_BGRA_EXT | color-renderable | 8 | 8 | 8 | 8 | | |
|-----------------|------------------|------|------|------|------|------|------|
Revision History
0.1, 26/04/2005 sks: Initial revision.
1.0, 08/05/2005 gdc: Final revision.
1.1, 19/03/2009 Jon Leech: add extension number and fix tabbing /
whitespace issues.
1.2, 26/10/2009 Benj Lipchak: add EXT suffix to BGRA token.
1.3, 12/09/2016 Tobias Hector: Added interaction with ES 2.0 (made it renderable).
Also made revision dates use the same (dd/mm/yyyy) format.