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Name
ANDROID_framebuffer_target
Name Strings
EGL_ANDROID_framebuffer_target
Contributors
Jamie Gennis
Contact
Jamie Gennis, Google Inc. (jgennis 'at' google.com)
Status
Complete
Version
Version 1, September 20, 2012
Number
EGL Extension #47
Dependencies
Requires EGL 1.0
This extension is written against the wording of the EGL 1.4 Specification
Overview
Android supports a number of different ANativeWindow implementations that
can be used to create an EGLSurface. One implementation, which is used to
send the result of performing window composition to a display, may have
some device-specific restrictions. Because of this, some EGLConfigs may
be incompatible with these ANativeWindows. This extension introduces a
new boolean EGLConfig attribute that indicates whether the EGLConfig
supports rendering to an ANativeWindow for which the buffers are passed to
the HWComposer HAL as a framebuffer target layer.
New Types
None.
New Procedures and Functions
None.
New Tokens
Accepted by the <attribute> parameter of eglGetConfigAttrib and
the <attrib_list> parameter of eglChooseConfig:
EGL_FRAMEBUFFER_TARGET_ANDROID 0x3147
Changes to Chapter 3 of the EGL 1.4 Specification (EGL Functions and Errors)
Section 3.4, Configuration Management, add a row to Table 3.1.
Attribute Type Notes
------------------------------ ------- ---------------------------
EGL_FRAMEBUFFER_TARGET_ANDROID boolean whether use as a HWComposer
framebuffer target layer is
supported
Section 3.4, Configuration Management, add a row to Table 3.4.
Attribute Default Selection Sort Sort
Criteria Order Priority
------------------------------ ------------- --------- ----- --------
EGL_FRAMEBUFFER_TARGET_ANDROID EGL_DONT_CARE Exact None
Section 3.4, Configuration Management, add a paragraph at the end of the
subsection titled Other EGLConfig Attribute Descriptions.
EGL_FRAMEBUFFER_TARGET_ANDROID is a boolean indicating whether the
config may be used to create an EGLSurface from an ANativeWindow for
which the buffers are to be passed to HWComposer as a framebuffer
target layer.
Section 3.4.1, Querying Configurations, change the last paragraph as follow
EGLConfigs are not sorted with respect to the parameters
EGL_BIND_TO_TEXTURE_RGB, EGL_BIND_TO_TEXTURE_RGBA, EGL_CONFORMANT,
EGL_LEVEL, EGL_NATIVE_RENDERABLE, EGL_MAX_SWAP_INTERVAL,
EGL_MIN_SWAP_INTERVAL, EGL_RENDERABLE_TYPE, EGL_SURFACE_TYPE,
EGL_TRANSPARENT_TYPE, EGL_TRANSPARENT_RED_VALUE,
EGL_TRANSPARENT_GREEN_VALUE, EGL_TRANSPARENT_BLUE_VALUE, and
EGL_RECORDABLE_ANDROID.
Issues
Revision History
#1 (Jamie Gennis, September 20, 2012)
- Initial draft.
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