a

src/drm.cpp

@@ -272,6 +272,7 @@ static void drm_unlock_fb_internal( struct drm_t *drm, struct fb *fb );
 
 std::atomic<uint64_t> g_nCompletedPageFlipCount = { 0u };
 
+extern void mangoapp_output_update( uint64_t vblanktime );
 static void page_flip_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, unsigned int crtc_id, void *data)
 {
 	uint64_t flipcount = (uint64_t)data;
@@ -333,6 +334,8 @@ static void page_flip_handler(int fd, unsigned int frame, unsigned int sec, unsi
 	g_DRM.fbids_queued.clear();
 
 	g_DRM.flip_lock.unlock();
+
+	mangoapp_output_update( vblanktime );
 }
 
 void flip_handler_thread_run(void)

src/mangoapp.cpp

@@ -52,3 +52,26 @@ void mangoapp_update( uint64_t visible_frametime, uint64_t app_frametime_ns, uin
     mangoapp_msg_v1.outputHeight = g_nOutputHeight;
     msgsnd(msgid, &mangoapp_msg_v1, sizeof(mangoapp_msg_v1) - sizeof(mangoapp_msg_v1.hdr.msg_type), IPC_NOWAIT);
 }
+
+extern uint64_t g_uCurrentBasePlaneCommitID;
+extern bool g_bCurrentBasePlaneIsFifo;
+void mangoapp_output_update( uint64_t vblanktime )
+{
+    if ( !g_bCurrentBasePlaneIsFifo )
+    {
+        return;
+    }
+
+	static uint64_t s_uLastBasePlaneCommitID = 0;
+	if ( s_uLastBasePlaneCommitID != g_uCurrentBasePlaneCommitID )
+	{
+		static uint64_t s_uLastBasePlaneUpdateVBlankTime = vblanktime;
+        uint64_t last_frametime = s_uLastBasePlaneUpdateVBlankTime;
+        uint64_t frametime = vblanktime - last_frametime;
+		s_uLastBasePlaneUpdateVBlankTime = vblanktime;
+		s_uLastBasePlaneCommitID = g_uCurrentBasePlaneCommitID;
+        if ( last_frametime > vblanktime )
+            return;
+		mangoapp_update( frametime, uint64_t(~0ull), uint64_t(~0ull) );
+	}
+}

src/rendervulkan.cpp

@@ -2581,6 +2581,7 @@ bool acquire_next_image( void )
 static std::atomic<uint64_t> g_currentPresentWaitId = {0u};
 static std::mutex present_wait_lock;
 
+extern void mangoapp_output_update( uint64_t vblanktime );
 static void present_wait_thread_func( void )
 {
 	uint64_t present_wait_id = 0;
@@ -2598,7 +2599,9 @@ static void present_wait_thread_func( void )
 			if (present_wait_id != 0)
 			{
 				g_device.vk.WaitForPresentKHR( g_device.device(), g_output.swapChain, present_wait_id, 1'000'000'000lu );
-				vblank_mark_possible_vblank( get_time_in_nanos() );
+				uint64_t vblanktime = get_time_in_nanos();
+				vblank_mark_possible_vblank( vblanktime );
+				mangoapp_output_update( vblanktime );
 			}
 		}
 	}

src/steamcompmgr.cpp

@@ -765,6 +765,7 @@ struct commit_t : public gamescope::IWaitable
 	bool done = false;
 	bool async = false;
 	bool fifo = false;
+	bool is_steam = false;
 	std::optional<wlserver_vk_swapchain_feedback> feedback = std::nullopt;
 
 	uint64_t win_seq = 0;
@@ -818,11 +819,16 @@ struct commit_t : public gamescope::IWaitable
 		}
 
 		if ( m_bMangoNudge )
-			mangoapp_update( frametime, uint64_t(~0ull), uint64_t(~0ull) );
+			mangoapp_update( IsPerfOverlayFIFO() ? uint64_t(~0ull) : frametime, frametime, uint64_t(~0ull) );
 
 		nudge_steamcompmgr();
 	}
 
+	bool IsPerfOverlayFIFO()
+	{
+		return fifo || is_steam;
+	}
+
 	void CloseFenceInternal()
 	{
 		if ( m_nCommitFence < 0 )
@@ -949,6 +955,9 @@ std::mutex g_SteamCompMgrXWaylandServerMutex;
 
 VBlankTimeInfo_t g_SteamCompMgrVBlankTime = {};
 
+uint64_t g_uCurrentBasePlaneCommitID = 0;
+bool g_bCurrentBasePlaneIsFifo = false;
+
 static int g_nSteamCompMgrTargetFPS = 0;
 static uint64_t g_uDynamicRefreshEqualityTime = 0;
 static int g_nDynamicRefreshRate[DRM_SCREEN_TYPE_COUNT] = { 0, 0 };
@@ -1429,6 +1438,7 @@ import_commit ( steamcompmgr_win_t *w, struct wlr_surface *surf, struct wlr_buff
 	commit->buf = buf;
 	commit->async = async;
 	commit->fifo = fifo;
+	commit->is_steam = window_is_steam( w );
 	commit->presentation_feedbacks = std::move(presentation_feedbacks);
 	if (swapchain_feedback)
 		commit->feedback = *swapchain_feedback;
@@ -2392,6 +2402,9 @@ paint_window(steamcompmgr_win_t *w, steamcompmgr_win_t *scaleW, struct FrameInfo
 		g_CachedPlanes[ HELD_COMMIT_BASE ] = basePlane;
 		if ( !(flags & PaintWindowFlag::FadeTarget) )
 			g_CachedPlanes[ HELD_COMMIT_FADE ] = basePlane;
+
+		g_uCurrentBasePlaneCommitID = lastCommit->commitID;
+		g_bCurrentBasePlaneIsFifo = lastCommit->IsPerfOverlayFIFO();
 	}
 }