Try to create script to query the egl device enumerations

tests/egl_ext_enumerate.py

@@ -0,0 +1,27 @@
+from os_egl import egl_context
+from OpenGL import EGL
+from OpenGL.EGL.EXT import device_query, device_enumeration
+from OpenGL.GL import GLint
+
+def main():
+    with egl_context(output=None) as context:
+        display,context,surface = context
+        print("Vendor: %s"%(EGL.eglQueryString(display, EGL.EGL_VENDOR)))
+        print("Version: %s"%(EGL.eglQueryString(display, EGL.EGL_VERSION)))
+        print("Extensions: %s"%(EGL.eglQueryString(display, EGL.EGL_EXTENSIONS),))
+        print("Client Extensions: %s"%(EGL.eglQueryString(display, EGL.EGL_CLIENT_APIS),))
+        if device_enumeration.eglQueryDevicesEXT:
+            devices = (device_query.EGLDeviceEXT * 5)()
+            count = GLint()
+            device_enumeration.eglQueryDevicesEXT(
+                5,
+                devices,
+                count,
+            )
+            for device in devices[:int(count)]:
+                print(device)
+        else:
+            print('No device_query extension available')
+
+if __name__ == "__main__":
+    main()

tests/os_egl.py

@@ -85,18 +85,19 @@ def egl_context(
     if ctx == EGL_NO_CONTEXT:
         raise RuntimeError( 'Unable to create context' )
     eglMakeCurrent( display, surface, surface, ctx )
-    yield ctx,surface 
+    yield display,ctx,surface 
     content = glReadPixelsub(0,0, width, height, GL_RGB, outputType=None)
     if output:
         write_ppm(content, output)
     # eglSwapBuffers( display, surface )
 
 def main():
     with egl_context() as setup:
-        ctx,surface = setup
+        display,ctx,surface = setup
         glClearColor(1.0,1.0,1.0,1.0)
         glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
 
+
 if __name__ == '__main__':
     logging.basicConfig(level=logging.INFO)
     main()