display timing statistics

src/main.c3

@@ -5,6 +5,7 @@ import ugui;
 import rl;
 import std::time;
 import std::collections::ringbuffer;
+import std::core::string;
 
 def Times = ringbuffer::RingBuffer(<time::NanoDuration, 128>);
 
@@ -23,6 +24,26 @@ fn void Times.print_stats(&times)
 	io::printfn("min=%s, max=%s, avg=%s", min, max, avg);
 }
 
+struct TimeStats {
+	time::NanoDuration min, max, avg;
+}
+
+fn TimeStats Times.get_stats(&times)
+{
+	time::NanoDuration min, max, avg, x;
+	min = times.get(0);
+	for (usz i = 0; i < times.written; i++) {
+		x = times.get(i);
+		if (x < min) { min = x; }
+		if (x > max) { max = x; }
+		avg += x;
+	}
+	avg = (NanoDuration)((ulong)avg/128.0);
+
+	return TimeStats{.min = min, .max = max, .avg = avg};
+}
+
+
 const ZString FONT_FS = `
 #version 330
 
@@ -146,6 +167,23 @@ rl::Image font_atlas;
 		|};
 		ui.div_end()!!;
 
+		// Timings counter
+		TimeStats dts = draw_times.get_stats();
+		TimeStats uts = ui_times.get_stats();
+
+		ui.layout_set_floating()!!;
+		ui.div_begin("fps", ugui::Rect{0, ui.height-50, 200, 50})!!;
+		{|
+			ui.layout_set_row()!!;
+			ui.text_unbounded("ui avg", string::tformat("ui avg: %s", uts.avg))!!;
+
+			ui.layout_next_row()!!;
+			ui.text_unbounded("draw avg", string::tformat("draw avg: %s", dts.avg))!!;
+
+			//ui.force_update()!!;
+		|};
+		ui.div_end()!!;
+
 		ui.frame_end()!!;
 		/* End UI Handling */
 		ui_times.push(clock.mark());