2012-11-29 00:18:03 +00:00
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Name
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ANDROID_image_native_buffer
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Name Strings
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EGL_ANDROID_image_native_buffer
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Contributors
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2012-11-29 23:58:45 +00:00
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Mathias Agopian
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2012-11-29 00:18:03 +00:00
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Jamie Gennis
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Jesse Hall
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Contact
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Jesse Hall, Google Inc. (jessehall 'at' google.com)
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Status
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2012-11-29 23:58:45 +00:00
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Complete
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2012-11-29 00:18:03 +00:00
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Version
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Version 1, November 28, 2012
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Number
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2012-12-14 17:58:45 +00:00
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EGL Extension #49
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2012-11-29 00:18:03 +00:00
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Dependencies
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EGL 1.2 is required.
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EGL_KHR_image_base is required.
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This extension is written against the wording of the EGL 1.2
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Specification.
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Overview
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This extension enables using an Android window buffer (struct
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ANativeWindowBuffer) as an EGLImage source.
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New Types
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None.
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New Procedures and Functions
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None.
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New Tokens
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Accepted by the <target> parameter of eglCreateImageKHR:
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EGL_NATIVE_BUFFER_ANDROID 0x3140
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Changes to Chapter 3 of the EGL 1.2 Specification (EGL Functions and Errors)
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Add to section 2.5.1 "EGLImage Specification" (as defined by the
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EGL_KHR_image_base specification), in the description of
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eglCreateImageKHR:
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"Values accepted for <target> are listed in Table aaa, below.
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+----------------------------+-----------------------------------------+
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| <target> | Notes |
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+----------------------------+-----------------------------------------+
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| EGL_NATIVE_BUFFER_ANDROID | Used for ANativeWindowBuffer objects |
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+----------------------------+-----------------------------------------+
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Table aaa. Legal values for eglCreateImageKHR <target> parameter
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...
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If <target> is EGL_NATIVE_BUFFER_ANDROID, <dpy> must be a valid display,
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<ctx> must be EGL_NO_CONTEXT, <buffer> must be a pointer to a valid
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ANativeWindowBuffer object (cast into the type EGLClientBuffer), and
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attributes other than EGL_IMAGE_PRESERVED_KHR are ignored."
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Add to the list of error conditions for eglCreateImageKHR:
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"* If <target> is EGL_NATIVE_BUFFER_ANDROID and <buffer> is not a
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pointer to a valid ANativeWindowBuffer, the error EGL_BAD_PARAMETER
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is generated.
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* If <target> is EGL_NATIVE_BUFFER_ANDROID and <ctx> is not
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EGL_NO_CONTEXT, the error EGL_BAD_CONTEXT is generated.
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* If <target> is EGL_NATIVE_BUFFER_ANDROID and <buffer> was created
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with properties (format, usage, dimensions, etc.) not supported by
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the EGL implementation, the error EGL_BAD_PARAMETER is generated."
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Issues
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1. Should this extension define what combinations of ANativeWindowBuffer
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properties implementations are required to support?
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RESOLVED: No.
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The requirements have evolved over time and will continue to change with
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future Android releases. The minimum requirements for a given Android
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version should be documented by that version.
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Revision History
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#1 (Jesse Hall, November 28, 2012)
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- Initial draft.
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