feat: initial video wallpaper implementation

Plugins/ZShell/Internal/wallpapersurface.cpp

@@ -53,6 +53,11 @@ WallpaperSurface::WallpaperSurface(
 }
 
 WallpaperSurface::~WallpaperSurface() {
+	if (m_frameCallback) {
+		wl_callback_destroy(m_frameCallback);
+		m_frameCallback = nullptr;
+	}
+
 	if (m_eglSurface != EGL_NO_SURFACE)
 		eglDestroySurface(m_service->m_eglDisplay, m_eglSurface);
 
@@ -68,8 +73,45 @@ WallpaperSurface::~WallpaperSurface() {
 	if (m_surface) wl_surface_destroy(m_surface);
 }
 
-void WallpaperSurface::redraw() {
-	m_service->queue(this);
+void WallpaperSurface::markDirty() {
+	m_dirty.store(true, std::memory_order_relaxed);
+}
+
+bool WallpaperSurface::needsDraw() const {
+	return m_dirty.load(std::memory_order_relaxed);
+}
+
+bool WallpaperSurface::frameReady() const {
+	return m_frameReady.load(std::memory_order_relaxed);
+}
+
+void WallpaperSurface::requestFrame() {
+	if (!m_surface || m_frameCallback) return;
+
+	m_frameCallback = wl_surface_frame(m_surface);
+
+	static const struct wl_callback_listener listener = {
+		[](void* data, struct wl_callback*, uint32_t) {
+			static_cast<WallpaperSurface*>(data)->onFrameDone();
+		},
+	};
+
+	wl_callback_add_listener(m_frameCallback, &listener, this);
+}
+
+void WallpaperSurface::onFrameDone() {
+	if (m_frameCallback) {
+		wl_callback_destroy(m_frameCallback);
+		m_frameCallback = nullptr;
+	}
+
+	m_frameReady.store(true, std::memory_order_relaxed);
+	m_service->wake();
+}
+
+void WallpaperSurface::endDraw() {
+	m_dirty.store(false, std::memory_order_relaxed);
+	m_frameReady.store(false, std::memory_order_relaxed);
 }
 
 void WallpaperSurface::zwlr_layer_surface_v1_configure(
@@ -141,6 +183,7 @@ void WallpaperSurface::updateBuffer() {
 	if (QtWayland::wp_viewport::isInitialized())
 		set_destination(m_size.width(), m_size.height());
 
+	requestFrame();
 	m_service->queue(this);
 }