1 files changed, 153 insertions, 0 deletions
diff --git a/kmscube/cube-x11.cpp b/kmscube/cube-x11.cpp
new file mode 100644
index 0000000..eb57616
--- /dev/null
+++ b/kmscube/cube-x11.cpp
@@ -0,0 +1,153 @@
+
+#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, reinterpret_cast<void*>(static_cast<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);
+}