EXT_device_query_name

EGL_EXT_device_query_name

Kyle Brenneman,  NVIDIA  (kbrenneman 'at' nvidia.com)
Daniel Kartch, NVIDIA (dkartch 'at' nvidia.com)

Kyle Brenneman,  NVIDIA  (kbrenneman 'at' nvidia.com)

Complete

Version 1 - June 12, 2020

EGL Extension #140

EGL device extension

Written based on the wording of the EGL 1.5 specification.

EGL_EXT_device_query is required.

The EGL_EXT_device_enumeration and EGL_EXT_device_query extensions
provide a list of devices and a list of extensions, but lacks a way
to find a name for a device that an application can present to a
user.

This extension adds two new strings that an application can query to
find human-readable names.

None

None

Accepted by the <name> parameter of eglQueryDeviceStringEXT:

    EGL_RENDERER_EXT                0x335F

eglQueryDeviceStringEXT accepts two new attributes.

EGL_VENDOR and EGL_RENDERER_EXT return a human-readable name for the
vendor and device, respectively.

The format of the EGL_VENDOR and EGL_RENDERER strings is
implementation-dependent.

The EGL_VENDOR string for an EGLDeviceEXT is not required to match
the EGL_VENDOR string for an EGLDisplay or the GL_VENDOR string for
a context. Similarly, the EGL_RENDERER string is not required to
match the GL_RENDERER string for a context.

1.  Do we need a device query, instead of just creating an
    EGLDisplay and calling eglQueryString?

    RESOLVED: Yes, a device-level query is useful, because some
    devices might not be usable with EGL_EXT_platform_device. This
    is especially true on systems where different devices are
    handled by different drivers.

2.  If an application creates an EGLDisplay from an EGLDevice,
    are the EGL_VENDOR strings required to match?

    RESOLVED: No. Some implementations might not load a driver until
    eglInitialize, and so might have a different or more specific
    EGL_VENDOR string associated with an EGLDisplay than with an
    EGLDeviceEXT. In addition, an implementation might select a
    driver to use based on other parameters in
    eglGetPlatformDisplay.

#1 (June 12, 2020) Kyle Brenneman

    - Initial draft