new file mode 100644
--- /dev/null
+++ b/pytouhou/ui/opengl/backend_glfw.pyx
@@ -0,0 +1,41 @@
+# -*- encoding: utf-8 -*-
+##
+## Copyright (C) 2016 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published
+## by the Free Software Foundation; version 3 only.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+from .backend cimport profile, major, minor, double_buffer, is_legacy
+
+cimport pytouhou.lib.glfw as glfw
+
+
+def create_glfw_window(title, width, height):
+    '''Create a window (using GLFW) and an OpenGL context.'''
+
+    glfw.init()
+
+    if profile == 'core':
+        glfw.window_hint(glfw.CLIENT_API, glfw.OPENGL_API)
+        glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
+    elif profile == 'es':
+        glfw.window_hint(glfw.CLIENT_API, glfw.OPENGL_ES_API)
+    glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, major)
+    glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, minor)
+    glfw.window_hint(glfw.ALPHA_BITS, 0)
+    glfw.window_hint(glfw.DEPTH_BITS, 24 if is_legacy else 0)
+    if double_buffer >= 0:
+        glfw.window_hint(glfw.DOUBLEBUFFER, double_buffer)
+
+    # Legacy contexts don’t support our required extensions for scaling.
+    if not is_legacy:
+        glfw.window_hint(glfw.RESIZABLE, True)
+
+    return glfw.Window(width, height, title)