def eglQueryDevicesEXT(max_devices=10): # pylint: disable=invalid-name
devices = (EGLDeviceEXT * max_devices)()
num_devices = EGL.EGLint()
success = _eglQueryDevicesEXT(max_devices, devices, num_devices)
if success == EGL.EGL_TRUE:
return [devices[i] for i in range(num_devices.value)]
else:
raise error.GLError(err=EGL.eglGetError(),
baseOperation=eglQueryDevicesEXT,
result=success)
def create_initialized_headless_egl_display():
"""Creates an initialized EGL display directly on a device."""
for device in egl_get_devices():
display = egl.eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, device,
None)
if display != egl.EGL_NO_DISPLAY and egl.eglGetError(
) == egl.EGL_SUCCESS:
# `eglInitialize` may or may not raise an exception on failure depending
# on how PyOpenGL is configured. We therefore catch a `GLError` and also
# manually check the output of `eglGetError()` here.
try:
initialized = egl.eglInitialize(display, None, None)
except error.GLError:
pass
else:
if initialized == egl.EGL_TRUE and egl.eglGetError(
) == egl.EGL_SUCCESS:
return display
return egl.EGL_NO_DISPLAY
