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+Name
+
+    EXT_device_query
+
+Name Strings
+
+    EGL_EXT_device_query
+
+Contributors
+
+    James Jones, NVIDIA  (jajones 'at' nvidia.com)
+    Jamie Madill, Google  (jmadill 'at' google.com)
+
+Contacts
+
+    Jamie Madill, Google  (jmadill 'at' google.com)
+
+Status
+
+    Complete.
+
+Version
+
+    Version 1 - Mar 25rd, 2015
+
+Number
+
+    EGL Extension #89
+
+Extension Type
+
+    EGL client extension
+
+Dependencies
+
+    Written against the wording of EGL 1.5.
+
+    Requires EGL 1.5 or an earlier verison of EGL with the
+    EGL_EXT_client_extensions extension.
+
+Overview
+
+    Increasingly, EGL and its client APIs are being used in place of
+    "native" rendering APIs to implement the basic graphics
+    functionality of native windowing systems.  This creates demand
+    for a method to access native GPU or device objects directly
+    rather than calling EGL or GL entry points.
+
+    This extension defines the method for an application to query
+    native device objects from an EGL Display.
+
+New Types
+
+    This is the type of a handle that represents an EGLDeviceEXT
+    object.
+
+        typedef void* EGLDeviceEXT;
+
+    If EGL 1.5 is not supported, the following type is added, as
+    defined in the EGL 1.5 specification:
+
+        typedef intptr_t EGLAttrib;
+
+New Functions
+
+    EGLBoolean eglQueryDeviceAttribEXT(EGLDeviceEXT device,
+                                       EGLint attribute,
+                                       EGLAttrib *value);
+
+    const char *eglQueryDeviceStringEXT(EGLDeviceEXT device,
+                                        EGLint name);
+
+    EGLBoolean eglQueryDisplayAttribEXT(EGLDisplay dpy,
+                                        EGLint attribute,
+                                        EGLAttrib *value);
+
+New Tokens
+
+    Functions with a return type of EGLDeviceEXT will return this
+    value on failure:
+
+        EGL_NO_DEVICE_EXT                      ((EGLDeviceEXT)0)
+
+    This error value will be generated by functions that take an
+    EGLDeviceEXT object as a parameter:
+
+        EGL_BAD_DEVICE_EXT                     0x322B
+
+    Accepted by the <attribute> parameter of
+    eglQueryDisplayAttribEXT:
+
+        EGL_DEVICE_EXT                         0x322C
+
+Add a new section "2.1.2 Devices" after "2.1.1 Scalar Types"
+
+    All EGL operations occur on an EGLDeviceEXT.  However, devices
+    themselves expose no functionality.  They are simple abstract
+    objects that exist only for the sake of enumeration and
+    defining a namespace.
+
+Modify the last sentence of section "2.1.3" Displays" to read:
+
+    Besides devices, objects are always specified by the combination
+    of an EGLDisplay parameter with a parameter representing the
+    handle of the object.
+
+Add a new extension type to the list in section "2.8 Extensions"
+
+    Device Extensions
+        A *device extension* adds functionality to an individual
+        EGLDeviceEXT.  Different instances of EGLDeviceEXT may support
+        different sets of device extensions
+
+Add a new error to section "3.1 Errors"
+
+    EGL_BAD_DEVICE_EXT
+        An EGLDeviceEXT argument does not refer to a valid
+        EGLDeviceEXT.  Any command taking an EGLDeviceEXT parameter
+        may generate this error.
+
+Add a section "3.2 Devices" after "3.1 Errors"
+
+    To query the properties of a device, use:
+
+        EGLBoolean eglQueryDeviceAttribEXT(EGLDeviceEXT device,
+                                           EGLint attribute,
+                                           EGLAttrib *value);
+
+    On success, EGL_TRUE is returned and the requested attribute value
+    is returned in <value>.  Currently there are no valid values of
+    <attribute> defined.
+
+    On failure, EGL_FALSE is returned.  An EGL_BAD_ATTRIBUTE error is
+    generated if <attribute> is not a valid attribute.  An
+    EGL_BAD_DEVICE_EXT error is generated if <device> is not a valid
+    EGLDeviceEXT.
+
+        const char *eglQueryDeviceStringEXT(EGLDeviceEXT device,
+                                            EGLint name);
+
+    returns a pointer to a static, zero-terminated string describing
+    some aspect of the specified EGLDeviceEXT.  <name> must be
+    EGL_EXTENSIONS.
+
+    The EGL_EXTENSIONS string describes which device extensions are
+    supported by <device>.  The string is of the same format specified
+    for display and client extension strings in section 3.4. Note that
+    device extensions are properties of the device, and are distinct
+    from other extension strings.
+
+    On failure, NULL is returned.  An EGL_BAD_DEVICE_EXT error is
+    generated if <device> is not a valid EGLDeviceEXT.  An
+    EGL_BAD_PARAMETER error is generated if <name> is not one of the
+    values described above.
+
+Add a section "3.4 Display Attributes" after "3.3 EGL Versioning"
+
+    To query attributes of an initialized display, use:
+
+        EGLBoolean eglQueryDisplayAttribEXT(EGLDisplay dpy,
+                                            EGLint name,
+                                            EGLAttrib *value);
+
+    On success, EGL_TRUE is returned.  If <name> is EGL_DEVICE_EXT,
+    the EGLDeviceEXT associated with <dpy> is returned in <value>.
+    All displays have an associated EGLDeviceEXT, regardless of how
+    they were created.  A successful query of EGL_DEVICE_EXT will
+    never return EGL_NO_DEVICE_EXT.
+
+    On failure, EGL_FALSE is returned.  An EGL_NOT_INITIALIZED error
+    is generated if EGL is not initialized for <dpy>.  An
+    EGL_BAD_ATTRIBUTE error is generated if <name> is not a valid
+    value.
+
+    Because the EGLDeviceEXT is a property of <dpy>, any use of an
+    associated EGLDeviceEXT after <dpy> has been terminated gives
+    undefined results. Querying an EGL_DEVICE_EXT from <dpy> after a
+    call to eglTerminate() (and subsequent re-initialization) may
+    return a different value.
+
+Issues
+
+    None.
+
+Revision History:
+
+    #1  (Mar 25rd, 2015) Jamie Madill
+        - Initial Draft based on EGL_EXT_device_base