Merge pull request #147 from emfcamp/feature/reduce-draw-overlead

Only draw the focused and always-on-top apps

modules/system/scheduler/__init__.py

@@ -213,7 +213,7 @@ async def _render_task(self):
 
             with PerfTimer("render"):
                 ctx = display.get_ctx()
-                for app in self.foreground_stack:
+                for app in self.foreground_stack[-1:] + self.on_top_stack:
                     with PerfTimer(f"rendering {app}"):
                         ctx.save()
                         try:
@@ -227,11 +227,6 @@ async def _render_task(self):
                                 )
                             )
                         ctx.restore()
-                for app in self.on_top_stack:
-                    with PerfTimer(f"rendering {app}"):
-                        ctx.save()
-                        app.draw(ctx)
-                        ctx.restore()
                 display.end_frame(ctx)
             await asyncio.sleep(0)