diff --git a/kmscube/cube-x11.cpp b/kmscube/cube-x11.cpp
--- /dev/null
+++ b/kmscube/cube-x11.cpp
@@ -0,0 +1,155 @@
+
+#include <kms++util/kms++util.h>
+
+#include "cube.h"
+#include "cube-egl.h"
+#include "cube-gles2.h"
+
+#include <X11/Xlib-xcb.h>
+#include <X11/Xlibint.h>
+
+using namespace std;
+
+static void main_loop(Display* dpy, xcb_connection_t *c, xcb_window_t window, uint32_t width, uint32_t height)
+{
+ EglState egl(dpy);
+ EglSurface surface(egl, (void*)(uintptr_t)window);
+ GlScene scene;
+
+ scene.set_viewport(width, height);
+
+ unsigned framenum = 0;
+
+ surface.make_current();
+ surface.swap_buffers();
+
+ bool need_exit = false;
+
+ xcb_generic_event_t *event;
+ while (true) {
+
+ while ((event = xcb_poll_for_event (c))) {
+ bool handled = false;
+ uint8_t response_type = event->response_type & ~0x80;
+
+ switch (response_type) {
+ case XCB_EXPOSE: {
+ handled = true;
+ break;
+ }
+ case XCB_KEY_PRESS: {
+ handled = true;
+
+ xcb_key_press_event_t *kp = (xcb_key_press_event_t *)event;
+ if (kp->detail == 24 || kp->detail == 9) {
+ printf("Exit due to keypress\n");
+ need_exit = true;
+ }
+
+ break;
+ }
+ }
+
+ if (!handled) {
+ // Check if a custom XEvent constructor was registered in xlib for this event type, and call it discarding the constructed XEvent if any.
+ // XESetWireToEvent might be used by libraries to intercept messages from the X server e.g. the OpenGL lib waiting for DRI2 events.
+
+ XLockDisplay(dpy);
+ Bool (*proc)(Display*, XEvent*, xEvent*) = XESetWireToEvent(dpy, response_type, NULL);
+ if (proc) {
+ XESetWireToEvent(dpy, response_type, proc);
+ XEvent dummy;
+ event->sequence = LastKnownRequestProcessed(dpy);
+ proc(dpy, &dummy, (xEvent*)event);
+ }
+ XUnlockDisplay(dpy);
+ }
+
+ free(event);
+ }
+
+ if (s_num_frames && framenum >= s_num_frames)
+ need_exit = true;
+
+ if (need_exit)
+ break;
+
+ // this should be in XCB_EXPOSE, but we don't get the event after swaps...
+ scene.draw(framenum++);
+ surface.swap_buffers();
+ }
+}
+
+void main_x11()
+{
+ Display* dpy = XOpenDisplay(NULL);
+ FAIL_IF(!dpy, "Failed to connect to the X server");
+
+ xcb_connection_t *c = XGetXCBConnection(dpy);
+
+ /* Acquire event queue ownership */
+ XSetEventQueueOwner(dpy, XCBOwnsEventQueue);
+
+ /* Get the first screen */
+ const xcb_setup_t *setup = xcb_get_setup (c);
+ xcb_screen_t *screen = xcb_setup_roots_iterator (setup).data;
+
+ /* Create the window */
+
+ uint32_t width;
+ uint32_t height;
+
+ if (s_fullscreen) {
+ width = screen->width_in_pixels;
+ height = screen->height_in_pixels;
+ } else {
+ width = 600;
+ height = 600;
+ }
+
+ const uint32_t xcb_window_attrib_mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
+ const uint32_t xcb_window_attrib_list[] = {
+ // OVERRIDE_REDIRECT
+ 0,
+ // EVENT_MASK
+ XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS,
+ };
+
+ xcb_window_t window = xcb_generate_id (c);
+ xcb_create_window (c, /* Connection */
+ XCB_COPY_FROM_PARENT, /* depth (same as root)*/
+ window, /* window Id */
+ screen->root, /* parent window */
+ 0, 0, /* x, y */
+ width, height, /* width, height */
+ 0, /* border_width */
+ XCB_WINDOW_CLASS_INPUT_OUTPUT, /* class */
+ screen->root_visual, /* visual */
+ xcb_window_attrib_mask,
+ xcb_window_attrib_list);
+
+ if (s_fullscreen)
+ {
+ const char *net_wm_state = "_NET_WM_STATE";
+ const char *net_wm_state_fullscreen = "_NET_WM_STATE_FULLSCREEN";
+
+ xcb_intern_atom_cookie_t cookie = xcb_intern_atom(c, 0, strlen(net_wm_state), net_wm_state);
+ xcb_intern_atom_reply_t* reply = xcb_intern_atom_reply(c, cookie, 0);
+
+ xcb_intern_atom_cookie_t cookie2 = xcb_intern_atom(c, 0, strlen(net_wm_state_fullscreen), net_wm_state_fullscreen);
+ xcb_intern_atom_reply_t* reply2 = xcb_intern_atom_reply(c, cookie2, 0);
+
+ xcb_change_property(c, XCB_PROP_MODE_REPLACE, window, reply->atom, XCB_ATOM_ATOM , 32, 1, (void*)&reply2->atom);
+ }
+
+ xcb_map_window (c, window);
+ xcb_flush (c);
+
+ main_loop(dpy, c, window, width, height);
+
+ xcb_flush(c);
+ xcb_unmap_window(c, window);
+ xcb_destroy_window(c, window);
+
+ XCloseDisplay(dpy);
+}