Name

    ANGLE_platform_angle_opengl

Name Strings

    EGL_ANGLE_platform_angle_opengl

Contributors

    Shannon Woods, Google
    Geoff Lang, Google
    Courtney Goeltzenleuchter, Google

Contacts

    Geoff Lang, Google (geofflang 'at' chromium 'dot' org)

Status

    Draft

Version

    Version 4, 2018-05-17

Number

    EGL Extension XXX

Extension Type

    EGL client extension

Dependencies

    Requires ANGLE_platform_angle.

Overview

    This extension enables selection of OpenGL display types and,
    for OpenGL ES display types, allows the application to pass
    in a handle to the EGL library to use.

New Types

    None

New Procedures and Functions

    None

New Tokens

    Accepted as values for the EGL_PLATFORM_ANGLE_TYPE_ANGLE attribute:

        EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE               0x320D
        EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE             0x320E

    Accepted as an attribute name in the <attrib_list> argument of
    eglGetPlatformDisplayEXT:
        EGL_PLATFORM_ANGLE_EGL_HANDLE_ANGLE                0x3480

Additions to the EGL Specification

    None.

New Behavior

    To request a display that translates to OpenGL or OpenGL ES, the value of
    EGL_PLATFORM_ANGLE_TYPE_ANGLE should be:
      - EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE for an OpenGL display,
      - EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE for a native OpenGL ES display.

    To request a specific maximum context version to use for the underlying
    API, EGL_PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE and
    EGL_PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE can be used.

    To pass in a handle to the system EGL library, use the attribute
    EGL_PLATFORM_ANGLE_EGL_HANDLE_ANGLE. If EGL_PLATFORM_ANGLE_TYPE_ANGLE
    is not equal to EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE, an
    EGL_BAD_ATTRIBUTE is generated. If the handle provided with
    EGL_PLATFORM_ANGLE_EGL_HANDLE_ANGLE is not a valid EGL handle,
    behaviour is undefined.

Issues

    None

Revision History

    Version 1, 2014-06-05 (Geoff Lang)
      - Initial draft
    Version 2, 2014-10-27 (Geoff Lang)
      - Moved descriptions of platforms and major/minor versions from
        EGL_ANGLE_platform_angle spec to EGL_ANGLE_platform_angle_opengl.
    Version 3, 2014-11-26 (Geoff Lang)
      - Updated enum values.
    Version 4, 2018-05-17 (Courtney Goeltzenleuchter)
      - Add attribute for specifying underlying EGL library.