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PojavLauncherTeam
GitHub Repository: PojavLauncherTeam/angle
 Path: blob/main_old/extensions/EGL_ANGLE_device_eagl.txt
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Name

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    ANGLE_device_eagl

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Name Strings

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    EGL_ANGLE_device_eagl

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Contributors

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    Dean Jackson  (dino 'at' apple.com)

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    Ken Russell   (kbr 'at' google.com)

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Contact

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    Ken Russell   (kbr 'at' google.com)

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Status

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    Draft

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Version

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    Version 1, January 3, 2020

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Number

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    EGL Extension #XXX

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Extension Type

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    EGL device extension

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Dependencies

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    This extension is written against the language of EGL 1.5 as

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    modified by EGL_EXT_device_query.

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    EGL_EXT_device_query is required.

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Overview

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    ANGLE on iOS internally uses an OpenGL ES context allocated via EAGL.

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    This extension defines a mapping from an EGL device to the underlying

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    EAGLContext, after it's been queried from an EGL display.

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IP Status

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    No known claims.

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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 as a queried <attribute> in eglQueryDeviceAttribEXT:

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        EGL_EAGL_CONTEXT_ANGLE          0x348C

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Add a new section 2.1.3 (EAGL Devices) after 2.1.2 (Devices)

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    On iOS the underlying EAGLContext can be queried from the EGL device. The

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    intented purpose is to allow applications to create new EAGLContexts which

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    share resources with this one.

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Changes to section 3.2 (Devices)

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    Replace the paragraph immediately following the prototype for

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    eglQueryDeviceAttribEXT:

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    <attribute> must be EGL_EAGL_CONTEXT_ANGLE.  On success, EGL_TRUE is

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    returned, and a valid EAGLContext corresponding to the EGL device is

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    returned in <value>. This object is compatible with OpenGL ES and EAGL API

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    functions. If the EGL device is not currently associated with an

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    EAGLContext, EGL_BAD_ATTRIBUTE is returned, and <value> is left unchanged.

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Issues

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    None

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Revision History

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    Version 1, January 3, 2020 (Ken Russell)

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        - Initial Draft

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