display: Limit the refresh rate of the UI/common dialog

Macdu · Nov 8, 2023 · ca39e6d · ca39e6d
1 parent e0d0196
commit ca39e6d
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/vita3k/display/src/display.cpp b/vita3k/display/src/display.cpp
@@ -50,7 +50,11 @@ static void vblank_sync_thread(EmuEnvState &emuenv) {
 
                 // in this case, even though no new game frames are being rendered, we still need to update the screen
                 if (emuenv.kernel.is_threads_paused() || (emuenv.common_dialog.status == SCE_COMMON_DIALOG_STATUS_RUNNING))
-                    emuenv.renderer->should_display = true;
+                    // only display the UI/common dialog at 30 fps
+                    // this is necessary so that the command buffer processing doesn't get starved
+                    // with vsync enabled and a screen with a refresh rate of 60Hz or less
+                    if (display.vblank_count % 2 == 0)
+                        emuenv.renderer->should_display = true;
             }
 
             // maybe we should also use a mutex for this part, but it shouldn't be an issue