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1816828632
Adds formal specification for the unimplemented EGL_ANGLE_explicit_context extension. This extension will introduce alternate entry points that allow us to specify the context during the gl function call, so we can avoid looking it up in TLS. Bug: angleproject:1395 Change-Id: I6060c02b8edf586dc2443b563e2d292c00e4fbb7 Reviewed-on: https://chromium-review.googlesource.com/1033577 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>
87 lines
1.9 KiB
Plaintext
87 lines
1.9 KiB
Plaintext
Name
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ANGLE_explicit_context
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Name Strings
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EGL_ANGLE_explicit_context
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Contributors
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Brandon Jones, Intel
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Contacts
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Brandon Jones, Intel (brandon1.jones 'at' intel 'dot' com)
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Status
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Complete.
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Version
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Version 1, 2018-5-22
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Number
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EGL Extension XXX
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Extension Type
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EGL Client Extension
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Dependencies
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OpenGL ES 3.1 is required.
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EGL_KHR_get_all_proc_addresses is required.
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EGL_EXT_client_extensions is required.
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Overview
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This extension adds new OpenGL ES entry points that allow the user to pass the current EGL
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context as a function parameter. This allows users to skip lookup of the thread's current
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context upon entry.
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New Types
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None.
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New Procedures and Functions
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For every OpenGL ES entry point available through eglGetProcAddress, an additional entry point
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is made available. The entry points have the form of:
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<return value> gl<entry point name>ContextANGLE(GLeglContextANGLE context, <entry point parameters>)
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If a function already has an extension suffix, this form still applies.
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New Tokens
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None.
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Additions to the EGL Specification
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When using OpenGL ES as a client library, the ContextANGLE entry points allow the user to
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pass the current EGL context as a function parameter to provide better performance than
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looking up the current EGL context at every GL entry point.
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Calls made with an explicit context provide no additional validation for the passed context
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parameter.
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Calls made with an explicit context will generate errors under the same conditions as they
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would without an explicit context. Any instances of undefined behaviour without specifying
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an explicit context are still undefined when specifying an explicit context.
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When an EGL context that is not current is explicitly passed, the resulting behavior is
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undefined.
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Issues
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None.
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Revision History
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Version 1, 2018-5-22 (Brandon Jones)
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- Initial draft |