Avoid burning a huge amount of CPU in the menu when emulation is not running and vsync is disabled

--HG--
branch : nuklear_ui

1 files changed, 7 insertions, 0 deletions

diff --git a/nuklear_ui/blastem_nuklear.c b/nuklear_ui/blastem_nuklear.c
index bcff610..4785de6 100644
--- a/nuklear_ui/blastem_nuklear.c
+++ b/nuklear_ui/blastem_nuklear.c
@@ -206,8 +206,15 @@ void blastem_nuklear_render(void)
 
 void idle_loop(void)
 {
+	const uint32_t MIN_UI_DELAY = 15;
+	static uint32_t last;
 	while (current_view != view_play)
 	{
+		uint32_t current = render_elapsed_ms();
+		if ((current - last) < MIN_UI_DELAY) {
+			render_sleep_ms(MIN_UI_DELAY - (current - last) - 1);
+		}
+		last = current;
 		render_update_display();
 	}
 }