"""This checking script from https://github.com/mcfletch/pyopengl/issues/6"""

import OpenGL
import OpenGL.platform.egl

OpenGL.platform.PLATFORM = p = OpenGL.platform.egl.EGLPlatform()
from OpenGL import EGL
from OpenGL.EGL.VERSION import EGL_1_5
from OpenGL.EGL.EXT import platform_base
from OpenGL.EGL.MESA import platform_gbm
import ctypes, glob


def main():
    cards = sorted(glob.glob("/dev/dri/renderD*"))
    if not cards:
        print('SKIP')
        raise RuntimeError("Need a /dev/dri/renderD* device to do rendering")
    if len(cards) > 1:
        print("Note, using first card: %s" % (cards[0]))
    try:
        with open(cards[0], "w") as f:
            gbm = ctypes.CDLL("libgbm.so.1")  # On Ubuntu, package libgbm1
            dev = gbm.gbm_create_device(f.fileno())
            dpy = platform_base.eglGetPlatformDisplayEXT(
                platform_gbm.EGL_PLATFORM_GBM_MESA, ctypes.c_void_p(dev), ctypes.c_void_p(0)
            )
            print(dpy)
            if EGL_1_5.eglGetPlatformDisplay:
                dpy = EGL_1_5.eglGetPlatformDisplay(
                    platform_gbm.EGL_PLATFORM_GBM_MESA,
                    ctypes.c_void_p(dev),
                    ctypes.c_void_p(0),
                )
                print(dpy)
            else:
                print("No EGL_1_5 implementation")
    except PermissionError as error:
        print('SKIP')
        raise RuntimeError(str(error)) from error
    print('OK')


if __name__ == "__main__":
    main()