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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.
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