Rip out the qt version and intall the native XDG onejellyfish_9.99.2jellyfish/9.99.29.99.2

This has run-by-default enabled.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I99c85373965339a990476eec1772a27cfd360d6c

1 files changed, 747 insertions, 127 deletions

diff --git a/app/main.cpp b/app/main.cpp
index b68aeac..fe2fce2 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -1,83 +1,534 @@
 /*
- * Copyright (C) 2018 Konsulko Group
+ * Copyright © 2020 Collabora, Ltd.
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
-#include <QGuiApplication>
-#include <QApplication>
-#include <QtCore/QDebug>
-#include <QtCore/QCommandLineParser>
-#include <QtCore/QUrlQuery>
-#include <QtGui/QGuiApplication>
-#include <QtQml/QQmlApplicationEngine>
-#include <QtQml/QQmlContext>
-#include <QtQml/qqml.h>
-#include <QQuickWindow>
-#include <QtQuickControls2/QQuickStyle>
-#include <QtGui/QGuiApplication>
-#include <qpa/qplatformnativeinterface.h>
-#include <QTimer>
 
 #define GST_USE_UNSTABLE_API
-
-#include <QWidget>
+#define HAVE_MEMFD_CREATE
 
 #include <string>
 #include <iostream>
 #include <cstring>
+#include <cstdio>
+#include <cstdlib>
+
+#include <signal.h>
+#include <wayland-client.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <assert.h>
+
+#include "xdg-shell-client-protocol.h"
+#include "agl-shell-desktop-client-protocol.h"
+#include "zalloc.h"
 
 #include <gst/gst.h>
 
 #include <gst/video/videooverlay.h>
 #include <gst/wayland/wayland.h>
 
-#include "surface.hpp"
-
 #define WINDOW_WIDTH_SIZE	640
 #define WINDOW_HEIGHT_SIZE	720
 
 #define WINDOW_WIDTH_POS_X	640
 #define WINDOW_WIDTH_POS_Y	180
 
-struct cluster_window_data {
-	int x; int y;
-	int width; int height;
+
+// C++ requires a cast and we in wayland we do the cast implictly
+#define WL_ARRAY_FOR_EACH(pos, array, type) \
+	for (pos = (type)(array)->data; \
+	     (const char *) pos < ((const char *) (array)->data + (array)->size); \
+	     (pos)++)
+
+struct display {
+	struct wl_display *wl_display;
+	struct wl_registry *wl_registry;
+	struct wl_compositor *wl_compositor;
+	struct wl_output *wl_output;
+	struct wl_shm *shm;
+
+	struct {
+		int width;
+		int height;
+	} output_data;
+
+	struct xdg_wm_base *wm_base;
+	struct agl_shell_desktop *agl_shell_desktop;
+
+	int has_xrgb;
+};
+
+struct buffer {
+	struct wl_buffer *buffer;
+	void *shm_data;
+	int busy;
+};
+
+struct window {
+	struct display *display;
+
+	int x, y;
+	int width, height;
+
+	struct wl_surface *surface;
+
+	struct xdg_surface *xdg_surface;
+	struct xdg_toplevel *xdg_toplevel;
+	bool wait_for_configure;
+
+	int fullscreen, maximized;
+
+	struct buffer buffers[2];
+	struct wl_callback *callback;
 };
 
+
 struct cluster_receiver_data {
-	QWidget *widget;
-	QPlatformNativeInterface *native;
+	struct window *window;
 
 	GstElement *pipeline;
 	GstWaylandVideo *wl_video;
 	GstVideoOverlay *overlay;
+};
+
+static int running = 1;
+
+static void
+redraw(void *data, struct wl_callback *callback, uint32_t time);
+
+static void
+paint_pixels(void *image, int padding, int width, int height, uint32_t time)
+{
+	memset(image, 0x00, width * height * 4);
+}
+
+static void
+buffer_release(void *data, struct wl_buffer *buffer)
+{
+	struct buffer *mybuf = static_cast<struct buffer *>(data);
+	mybuf->busy = 0;
+}
+
+static const struct wl_buffer_listener buffer_listener = {
+	buffer_release
+};
+
+static int
+os_fd_set_cloexec(int fd)
+{
+	long flags;
+
+	if (fd == -1)
+		return -1;
+
+	flags = fcntl(fd, F_GETFD);
+	if (flags == -1)
+		return -1;
+
+	if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
+		return -1;
+
+	return 0;
+}
+
+static int
+set_cloexec_or_close(int fd)
+{
+	if (os_fd_set_cloexec(fd) != 0) {
+		close(fd);
+		return -1;
+	}
+	return fd;
+}
+
+static int
+create_tmpfile_cloexec(char *tmpname)
+{
+	int fd;
+
+#ifdef HAVE_MKOSTEMP
+	fd = mkostemp(tmpname, O_CLOEXEC);
+	if (fd >= 0)
+		unlink(tmpname);
+#else
+	fd = mkstemp(tmpname);
+	if (fd >= 0) {
+		fd = set_cloexec_or_close(fd);
+		unlink(tmpname);
+	}
+#endif
+
+	return fd;
+}
+
+/*
+ * Create a new, unique, anonymous file of the given size, and
+ * return the file descriptor for it. The file descriptor is set
+ * CLOEXEC. The file is immediately suitable for mmap()'ing
+ * the given size at offset zero.
+ *
+ * The file should not have a permanent backing store like a disk,
+ * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
+ *
+ * The file name is deleted from the file system.
+ *
+ * The file is suitable for buffer sharing between processes by
+ * transmitting the file descriptor over Unix sockets using the
+ * SCM_RIGHTS methods.
+ *
+ * If the C library implements posix_fallocate(), it is used to
+ * guarantee that disk space is available for the file at the
+ * given size. If disk space is insufficient, errno is set to ENOSPC.
+ * If posix_fallocate() is not supported, program may receive
+ * SIGBUS on accessing mmap()'ed file contents instead.
+ *
+ * If the C library implements memfd_create(), it is used to create the
+ * file purely in memory, without any backing file name on the file
+ * system, and then sealing off the possibility of shrinking it.  This
+ * can then be checked before accessing mmap()'ed file contents, to
+ * make sure SIGBUS can't happen.  It also avoids requiring
+ * XDG_RUNTIME_DIR.
+ */
+static int
+os_create_anonymous_file(off_t size)
+{
+	static const char weston_template[] = "/weston-shared-XXXXXX";
+	const char *path;
+	char *name;
+	int fd;
+	int ret;
+
+#ifdef HAVE_MEMFD_CREATE
+	fd = memfd_create("weston-shared", MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	if (fd >= 0) {
+		/* We can add this seal before calling posix_fallocate(), as
+		 * the file is currently zero-sized anyway.
+		 *
+		 * There is also no need to check for the return value, we
+		 * couldn't do anything with it anyway.
+		 */
+		fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK);
+	} else
+#endif
+	{
+		path = getenv("XDG_RUNTIME_DIR");
+		if (!path) {
+			errno = ENOENT;
+			return -1;
+		}
+
+		name = static_cast<char *>(malloc(strlen(path) + sizeof(weston_template)));
+		if (!name)
+			return -1;
+
+		strcpy(name, path);
+		strcat(name, weston_template);
+
+		fd = create_tmpfile_cloexec(name);
+
+		free(name);
+
+		if (fd < 0)
+			return -1;
+	}
+
+#ifdef HAVE_POSIX_FALLOCATE
+	do {
+		ret = posix_fallocate(fd, 0, size);
+	} while (ret == EINTR);
+	if (ret != 0) {
+		close(fd);
+		errno = ret;
+		return -1;
+	}
+#else
+	do {
+		ret = ftruncate(fd, size);
+	} while (ret < 0 && errno == EINTR);
+	if (ret < 0) {
+		close(fd);
+		return -1;
+	}
+#endif
+
+	return fd;
+}
+
+static int
+create_shm_buffer(struct display *display, struct buffer *buffer,
+		  int width, int height, uint32_t format)
+{
+	struct wl_shm_pool *pool;
+	int fd, size, stride;
+	void *data;
+
+	stride = width * 4;
+	size = stride * height;
+
+	fd = os_create_anonymous_file(size);
+	if (fd < 0) {
+		fprintf(stderr, "creating a buffer file for %d B failed: %s\n",
+				size, strerror(errno));
+		return -1;
+	}
+
+	data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (data == MAP_FAILED) {
+		fprintf(stderr, "mmap failed: %s\n", strerror(errno));
+		close(fd);
+		return -1;
+	}
+
+	pool = wl_shm_create_pool(display->shm, fd, size);
+	buffer->buffer = wl_shm_pool_create_buffer(pool, 0, width,
+						   height, stride, format);
+	wl_buffer_add_listener(buffer->buffer, &buffer_listener, buffer);
+	wl_shm_pool_destroy(pool);
+	close(fd);
+
+	buffer->shm_data = data;
+	return 0;
+}
+
+static struct buffer *
+get_next_buffer(struct window *window)
+{
+	struct buffer *buffer;
+	int ret = 0;
+
+	if (!window->buffers[0].busy)
+		buffer = &window->buffers[0];
+	else if (!window->buffers[1].busy)
+		buffer = &window->buffers[1];
+	else
+		return NULL;
+
+	if (!buffer->buffer) {
+		fprintf(stdout, "get_next_buffer() buffer is not set, setting with "
+				"width %d, height %d\n", window->width, window->height);
+		ret = create_shm_buffer(window->display, buffer, window->width,
+					window->height, WL_SHM_FORMAT_XRGB8888);
+
+		if (ret < 0)
+			return NULL;
+
+		/* paint the padding */
+		memset(buffer->shm_data, 0x00, window->width * window->height * 4);
+	}
+
+	return buffer;
+}
+
+
+static const struct wl_callback_listener frame_listener = {
+	redraw
+};
+
+static void
+redraw(void *data, struct wl_callback *callback, uint32_t time)
+{
+        struct window *window = static_cast<struct window *>(data);
+        struct buffer *buffer;
+
+        buffer = get_next_buffer(window);
+        if (!buffer) {
+                fprintf(stderr,
+                        !callback ? "Failed to create the first buffer.\n" :
+                        "Both buffers busy at redraw(). Server bug?\n");
+                abort();
+        }
+
+	// do the actual painting
+	paint_pixels(buffer->shm_data, 0x0, window->width, window->height, time);
+
+        wl_surface_attach(window->surface, buffer->buffer, 0, 0);
+        wl_surface_damage(window->surface, 0, 0, window->width, window->height);
+
+        if (callback)
+                wl_callback_destroy(callback);
+
+        window->callback = wl_surface_frame(window->surface);
+        wl_callback_add_listener(window->callback, &frame_listener, window);
+        wl_surface_commit(window->surface);
+
+        buffer->busy = 1;
+}
+
+static void
+shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
+{
+	struct display *d = static_cast<struct display *>(data);
+
+	if (format == WL_SHM_FORMAT_XRGB8888)
+		d->has_xrgb = true;
+}
+
+static const struct wl_shm_listener shm_listener = {
+	shm_format
+};
+
+static void
+xdg_wm_base_ping(void *data, struct xdg_wm_base *shell, uint32_t serial)
+{
+        xdg_wm_base_pong(shell, serial);
+}
+
+static const struct xdg_wm_base_listener xdg_wm_base_listener = {
+        xdg_wm_base_ping,
+};
+
+static void
+display_handle_geometry(void *data, struct wl_output *wl_output,
+			int x, int y, int physical_width, int physical_height,
+			int subpixel, const char *make, const char *model, int transform)
+{
+	(void) data;
+	(void) wl_output;
+	(void) x;
+	(void) y;
+	(void) physical_width;
+	(void) physical_height;
+	(void) subpixel;
+	(void) make;
+	(void) model;
+	(void) transform;
+}
+
+static void
+display_handle_mode(void *data, struct wl_output *wl_output, uint32_t flags,
+		    int width, int height, int refresh)
+{
+	struct display *d = static_cast<struct display *>(data);
+
+	if (wl_output == d->wl_output && (flags & WL_OUTPUT_MODE_CURRENT)) {
+		d->output_data.width = width;
+		d->output_data.height = height;
+
+		fprintf(stdout, "Found output with width %d and height %d\n",
+				d->output_data.width, d->output_data.height);
+	}
+}
 
-	bool widget_has_buffer_mapped;
-	struct cluster_window_data window_data;
+static void
+display_handle_scale(void *data, struct wl_output *wl_output, int scale)
+{
+	(void) data;
+	(void) wl_output;
+	(void) scale;
+}
+
+static void
+display_handle_done(void *data, struct wl_output *wl_output)
+{
+	(void) data;
+	(void) wl_output;
+}
+
+static const struct wl_output_listener output_listener = {
+	display_handle_geometry,
+	display_handle_mode,
+	display_handle_done,
+	display_handle_scale
+};
+
+static void
+application_id(void *data, struct agl_shell_desktop *agl_shell_desktop,
+		const char *app_id)
+{
+	(void) data;
+	(void) agl_shell_desktop;
+	(void) app_id;
+}
+
+static void
+application_id_state(void *data, struct agl_shell_desktop *agl_shell_desktop,
+		     const char *app_id, const char *app_data,
+		     uint32_t app_state, uint32_t app_role)
+{
+        (void) data;
+        (void) app_data;
+        (void) agl_shell_desktop;
+        (void) app_id;
+        (void) app_state;
+        (void) app_role;
+}
+
+static const struct agl_shell_desktop_listener agl_shell_desktop_listener = {
+        application_id,
+        application_id_state,
 };
 
-static struct wl_surface *
-getWlSurface(QPlatformNativeInterface *native, QWindow *window)
+static void
+registry_handle_global(void *data, struct wl_registry *registry, uint32_t id,
+		       const char *interface, uint32_t version)
 {
-	void *surf = native->nativeResourceForWindow("surface", window);
-	return static_cast<struct ::wl_surface *>(surf);
+	struct display *d = static_cast<struct display *>(data);
+
+	if (strcmp(interface, "wl_compositor") == 0) {
+		d->wl_compositor =
+			static_cast<struct wl_compositor *>(wl_registry_bind(registry, id,
+						    &wl_compositor_interface, 1));
+	} else if (strcmp(interface, "xdg_wm_base") == 0) {
+		d->wm_base = static_cast<struct xdg_wm_base *>(wl_registry_bind(registry,
+				id, &xdg_wm_base_interface, 1));
+		xdg_wm_base_add_listener(d->wm_base, &xdg_wm_base_listener, d);
+	} else if (strcmp(interface, "wl_shm") == 0) {
+		d->shm = static_cast<struct wl_shm *>(wl_registry_bind(registry,
+				id, &wl_shm_interface, 1));
+		wl_shm_add_listener(d->shm, &shm_listener, d);
+	} else if (strcmp(interface, "agl_shell_desktop") == 0) {
+		d->agl_shell_desktop = static_cast<struct agl_shell_desktop *>(wl_registry_bind(registry, id,
+						        &agl_shell_desktop_interface, 1));
+		/* as an example, show how to register for events from the compositor */
+		agl_shell_desktop_add_listener(d->agl_shell_desktop,
+					       &agl_shell_desktop_listener, d);
+	} else if (strcmp(interface, "wl_output") == 0) {
+		d->wl_output = static_cast<struct wl_output *>(wl_registry_bind(registry, id,
+					     &wl_output_interface, 1));
+		wl_output_add_listener(d->wl_output, &output_listener, d);
+	}
 }
 
+static void
+registry_handle_global_remove(void *data, struct wl_registry *reg, uint32_t id)
+{
+	(void) data;
+	(void) reg;
+	(void) id;
+}
+
+static const struct wl_registry_listener registry_listener = {
+	registry_handle_global,
+	registry_handle_global_remove,
+};
+
 
 static void
 error_cb(GstBus *bus, GstMessage *msg, gpointer user_data)
 {
-	struct cluster_receiver_data *d = static_cast<struct cluster_receiver_data *>(user_data);
+	struct cluster_receiver_data *d =
+		static_cast<struct cluster_receiver_data *>(user_data);
 
 	gchar *debug = NULL;
 	GError *err = NULL;
@@ -98,31 +549,20 @@ error_cb(GstBus *bus, GstMessage *msg, gpointer user_data)
 static GstBusSyncReply
 bus_sync_handler(GstBus *bus, GstMessage *message, gpointer user_data)
 {
-	struct cluster_receiver_data *d = static_cast<struct cluster_receiver_data *>(user_data);
+	struct cluster_receiver_data *d =
+		static_cast<struct cluster_receiver_data *>(user_data);
 
 	if (gst_is_wayland_display_handle_need_context_message(message)) {
 		GstContext *context;
-		struct wl_display *display_handle;
-
-		display_handle =
-			static_cast<struct wl_display *>(
-				d->native->nativeResourceForIntegration("display")
-			);
+		struct wl_display *display_handle = d->window->display->wl_display;
 
 		context = gst_wayland_display_handle_context_new(display_handle);
-
 		d->wl_video = GST_WAYLAND_VIDEO(GST_MESSAGE_SRC(message));
 		gst_element_set_context(GST_ELEMENT(GST_MESSAGE_SRC(message)), context);
 
 		goto drop;
 	} else if (gst_is_video_overlay_prepare_window_handle_message(message)) {
-		struct wl_surface *window_handle;
-		QWindow *win = d->widget->windowHandle();
-
-		if (!d->widget_has_buffer_mapped) {
-			d->widget->setVisible(true);
-			d->widget_has_buffer_mapped = true;
-		}
+		struct wl_surface *window_handle = d->window->surface;
 
 		/* GST_MESSAGE_SRC(message) will be the overlay object that we
 		 * have to use. This may be waylandsink, but it may also be
@@ -131,16 +571,15 @@ bus_sync_handler(GstBus *bus, GstMessage *message, gpointer user_data)
 		 * window handle and render_rectangle after restarting playback
 		 * and the actual window size is lost */
 		d->overlay = GST_VIDEO_OVERLAY(GST_MESSAGE_SRC(message));
-		window_handle = getWlSurface(d->native, win);
 
 		g_print("setting window handle and size (%d x %d) w %d, h %d\n",
-				d->window_data.x, d->window_data.y,
-				d->window_data.width, d->window_data.height);
+				d->window->x, d->window->y,
+				d->window->width, d->window->height);
 
 		gst_video_overlay_set_window_handle(d->overlay, (guintptr) window_handle);
 		gst_video_overlay_set_render_rectangle(d->overlay,
-				d->window_data.x, d->window_data.y,
-				d->window_data.width, d->window_data.height);
+						       d->window->x, d->window->y,
+						       d->window->width, d->window->height);
 
 		goto drop;
 	}
@@ -152,40 +591,227 @@ drop:
 	return GST_BUS_DROP;
 }
 
-int main(int argc, char *argv[])
+static void
+handle_xdg_surface_configure(void *data, struct xdg_surface *surface, uint32_t serial)
 {
-	int port = 0;
-	std::string token;
-	std::string role = "receiver";
-	QString my_role = "receiver";
+	struct window *window = static_cast<struct window *>(data);
 
-	struct cluster_receiver_data receiver_data = {};
-	struct cluster_window_data window_data = {};
+	xdg_surface_ack_configure(surface, serial);
+
+	if (window->wait_for_configure) {
+		redraw(window, NULL, 0);
+		window->wait_for_configure = false;
+	}
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+	handle_xdg_surface_configure,
+};
+
+static void
+handle_xdg_toplevel_configure(void *data, struct xdg_toplevel *xdg_toplevel,
+			      int32_t width, int32_t height,
+			      struct wl_array *states)
+{
+	struct window *window = static_cast<struct window *>(data);
+	uint32_t *p;
+
+	window->fullscreen = 0;
+	window->maximized = 0;
+
+	// use our own macro as C++ can't typecast from (void *) directly
+	WL_ARRAY_FOR_EACH(p, states, uint32_t *) {
+		uint32_t state = *p; 
+		switch (state) {
+		case XDG_TOPLEVEL_STATE_FULLSCREEN:
+			window->fullscreen = 1;
+			break;
+		case XDG_TOPLEVEL_STATE_MAXIMIZED:
+			window->maximized = 1;
+			break;
+		}
+	}
+
+	fprintf(stdout, "Got handle_xdg_toplevel_configure() "
+			"width %d, height %d, full %d, max %d\n", width, height,
+			window->fullscreen, window->maximized);
+
+	if (width > 0 && height > 0) {
+		if (!window->fullscreen && !window->maximized) {
+			window->width = width;
+			window->height = height;
+		}
+		window->width = width;
+		window->height = height;
+	} else if (!window->fullscreen && !window->maximized) {
+		if (width == 0)
+			window->width = WINDOW_WIDTH_SIZE;
+		else
+			window->width = width;
+
+		if (height == 0)
+			window->height = WINDOW_HEIGHT_SIZE;
+		else
+			window->height = height;
+	}
+
+	fprintf(stdout, "settting  width %d, height %d\n",
+			window->width, window->height);
+}
+
+static void
+handle_xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
+{
+	running = 0;
+}
+
+static const struct xdg_toplevel_listener xdg_toplevel_listener = {
+	handle_xdg_toplevel_configure,
+	handle_xdg_toplevel_close,
+};
+
+static struct window *
+create_window(struct display *display, int width, int height, const char *app_id)
+{
+	struct window *window;
+
+	assert(display->wm_base != NULL);
+
+	window = static_cast<struct window *>(zalloc(sizeof(*window)));
+	if (!window)
+		return NULL;
 
-	window_data.x = 0;
-	window_data.y = 0;
+	window->callback = NULL;
+	window->display = display;
+	window->width = width;
+	window->height = height;
+	window->surface = wl_compositor_create_surface(display->wl_compositor);
 
-	window_data.width = WINDOW_WIDTH_SIZE;
-	window_data.height = WINDOW_HEIGHT_SIZE;
+	if (display->wm_base) {
+		window->xdg_surface =
+			xdg_wm_base_get_xdg_surface(display->wm_base, window->surface);
+		assert(window->xdg_surface);
 
-	receiver_data.window_data = window_data;
+		xdg_surface_add_listener(window->xdg_surface,
+					 &xdg_surface_listener, window);
+		window->xdg_toplevel = xdg_surface_get_toplevel(window->xdg_surface);
+		assert(window->xdg_toplevel);
+
+		xdg_toplevel_add_listener(window->xdg_toplevel,
+					  &xdg_toplevel_listener, window);
+
+		xdg_toplevel_set_app_id(window->xdg_toplevel, app_id);
+
+		wl_surface_commit(window->surface);
+		window->wait_for_configure = true;
+	}
+
+	return window;
+}
+
+
+static void
+destroy_window(struct window *window)
+{
+	if (window->callback)
+		wl_callback_destroy(window->callback);
+
+	if (window->xdg_toplevel)
+		xdg_toplevel_destroy(window->xdg_toplevel);
+
+	if (window->xdg_surface)
+		xdg_surface_destroy(window->xdg_surface);
+
+	wl_surface_destroy(window->surface);
+	free(window);
+}
+
+static void
+signal_int(int sig, siginfo_t *si, void *_unused)
+{
+	running = 0;
+}
+
+static struct display *
+create_display(int argc, char *argv[])
+{
+	struct display *display;
+
+	display = static_cast<struct display *>(zalloc(sizeof(*display)));
+	if (display == NULL) {
+		fprintf(stderr, "out of memory\n");
+		exit(1);
+	}
+	display->wl_display = wl_display_connect(NULL);
+	assert(display->wl_display);
+
+	display->has_xrgb = false;
+	display->wl_registry = wl_display_get_registry(display->wl_display);
+
+	wl_registry_add_listener(display->wl_registry, &registry_listener, display);
+	wl_display_roundtrip(display->wl_display);
+
+	if (display->shm == NULL) {
+		fprintf(stderr, "No wl_shm global\n");
+		return NULL;
+	}
+
+	if (display->agl_shell_desktop == NULL) {
+		fprintf(stderr, "No agl_shell extension present\n");
+		return NULL;
+	}
+
+	wl_display_roundtrip(display->wl_display);
+
+	if (!display->has_xrgb) {
+		fprintf(stderr, "WL_SHM_FORMAT_XRGB32 not available\n");
+		return NULL;
+	}
+
+	return display;
+}
+
+static void
+destroy_display(struct display *display)
+{
+	if (display->shm)
+		wl_shm_destroy(display->shm);
+
+	if (display->wm_base)
+		xdg_wm_base_destroy(display->wm_base);
+
+	if (display->agl_shell_desktop)
+		agl_shell_desktop_destroy(display->agl_shell_desktop);
+
+	if (display->wl_compositor)
+		wl_compositor_destroy(display->wl_compositor);
+
+	wl_registry_destroy(display->wl_registry);
+	wl_display_flush(display->wl_display);
+	wl_display_disconnect(display->wl_display);
+	free(display);
+}
+
+int main(int argc, char *argv[])
+{
+	int ret = 0;
+	struct sigaction sa;
+	struct cluster_receiver_data receiver_data = {};
+	struct display *display;
+	struct window *window;
+
+	std::string role = "receiver";
+
+	sa.sa_sigaction = signal_int;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = SA_RESETHAND | SA_SIGINFO;
+	sigaction(SIGINT, &sa, NULL);
 
 	int gargc = 2;
 	char **gargv = (char**) malloc(2 * sizeof(char*));
 	gargv[0] = strdup(argv[0]);
 	gargv[1] = strdup("--gst-debug-level=2");
 
-	try {
-		port = std::stol(argv[1]);
-		token = argv[2];
-	} catch (const std::invalid_argument& e) {
-		std::cerr << "Invalid argument" << std::endl;
-		exit(1);
-	} catch (const std::out_of_range& e) {
-		std::cerr << "Port out of range" << std::endl;
-		exit(1);
-	}
-
 	std::string pipeline_str = \
 		"rtpbin name=rtpbin udpsrc "
 		"caps=\"application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=JPEG,payload=26\" "
@@ -196,37 +822,37 @@ int main(int argc, char *argv[])
 
 	std::cout << "Using pipeline: " << pipeline_str << std::endl;
 
-	QApplication app(argc, argv);
-	QPlatformNativeInterface *native = qApp->platformNativeInterface();
-	receiver_data.native = native;
-
-	// mark the application id -> my_role
-	app.setDesktopFileName(my_role);
-
-	SurfaceHandler handler(port, token, role);
-
-	// we already have the app_id -> role this will set-up the x and y
-	// position and a bounding box that will be used to clip out the
-	// surface. Note, that in this example, the surface area is the same as
-	// the bounding box
-	handler.set_bounding_box(WINDOW_WIDTH_POS_X, WINDOW_WIDTH_POS_Y,
-				 0, 0, WINDOW_WIDTH_SIZE, WINDOW_HEIGHT_SIZE);
-
-	QWidget *widget = new QWidget;
-	widget->resize(WINDOW_WIDTH_SIZE,
-		       WINDOW_HEIGHT_SIZE);
-	widget->setVisible(false);
-	// this is necessary to trigger a buffer attach on the xdg surface;
-	// waylandsink will use that surface to create a sub-surface and will
-	// perform a commit on the parent one; without doing a show() here
-	// QtWayland will not attach the buffer to the surface, and the parent
-	// surface will not be 'committed'; most likely this require more
-	// fiddling as to keep the buffer attached but not displayed or use
-	// some kind of local alpha to display that cluster is showing
-	widget->show();
-
-	receiver_data.widget = widget;
-	receiver_data.widget_has_buffer_mapped = true;
+	display = create_display(argc, argv);
+	if (!display)
+		return -1;
+
+	// this will set-up the x and y position and a bounding box that will
+	// be used to clip out the surface. Note, that in this example, the
+	// surface area is the same as the bounding box.
+	agl_shell_desktop_set_app_property(display->agl_shell_desktop, role.c_str(),
+					   AGL_SHELL_DESKTOP_APP_ROLE_POPUP,
+					   WINDOW_WIDTH_POS_X, WINDOW_WIDTH_POS_Y,
+					   0, 0, WINDOW_WIDTH_SIZE, WINDOW_HEIGHT_SIZE,
+					   display->wl_output);
+
+	// we use the role to set a correspondence between the top level
+	// surface and our application, with the previous call letting the
+	// compositor know that we're one and the same
+	window = create_window(display, WINDOW_WIDTH_SIZE,
+			       WINDOW_HEIGHT_SIZE, role.c_str());
+
+	if (!window)
+		return -1;
+
+	window->display = display;
+	receiver_data.window = window;
+
+	/* Initialise damage to full surface, so the padding gets painted */
+	wl_surface_damage(window->surface, 0, 0,
+			  window->width, window->height);
+
+	if (!window->wait_for_configure)
+		redraw(window, NULL, 0);
 
 	GstElement *pipeline = gst_parse_launch(pipeline_str.c_str(), NULL);
 	if (!pipeline) {
@@ -242,21 +868,15 @@ int main(int argc, char *argv[])
 	gst_bus_set_sync_handler(bus, bus_sync_handler, &receiver_data, NULL);
 	gst_object_unref(bus);
 
-	// Start the pipeline, giving Qt the time to create everything; not
-	// waiting here will cause both Qt and Gstreamer to race, running as
-	// different threads. So this gives Qt sufficient time to create the
-	// Widget, the surface the buffer and attach it to the surface. The
-	// drawback is that it will displayed until the remote side start
-	// sending frames to decode.
-	std::cout << "wainting for Qt to be ready..." << std::endl;
-	QTimer::singleShot(500, [pipeline](){
-		gst_element_set_state(pipeline, GST_STATE_PLAYING);
-		std::cout << "gstreamer pipeline running" << std::endl;
-	});
+	gst_element_set_state(pipeline, GST_STATE_PLAYING);
+	std::cout << "gstreamer pipeline running" << std::endl;
 
 	// run the application
-	int ret = app.exec();
-	widget->hide();
+	while (running && ret != -1)
+		ret = wl_display_dispatch(display->wl_display);
+
+	destroy_window(window);
+	destroy_display(display);
 
 	gst_element_set_state(pipeline, GST_STATE_NULL);
 	gst_object_unref(pipeline);