4 files changed, 43 insertions, 2 deletions
diff --git a/src/common.hpp b/src/common.hpp
index b88434e..7b784bf 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -10,6 +10,8 @@
 #include <SFML/Graphics.hpp>
 #include "math.hpp"
 
+#define count(A) (sizeof(A) / sizeof((A)[0]))
+
 extern bool debug_draw_cmodels;
 extern bool debug_draw_paths;
 extern bool debug_draw_tile_coords;
@@ -252,6 +254,9 @@ namespace interface {
 
 		std::list<log_entry_t> log;
 
+		double perf_hist[10] = {0};
+		size_t perf_hist_index = 0;
+
 	public:
 		state_t(sf::RenderWindow *window_, game::state_t *game);
 		void tick(double dt);
@@ -313,6 +318,10 @@ namespace render {
 	public:
 		double now, dt;
 
+		struct {
+			size_t sectors, tiles, entities;
+		} stats;
+
 		state_t(sf::RenderWindow *window_);
 		void begin_frame(double time_, double dt_);
 		void end_frame(void);
diff --git a/src/game/interface.cpp b/src/game/interface.cpp
index 2a52220..148f790 100644
--- a/src/game/interface.cpp
+++ b/src/game/interface.cpp
@@ -1,4 +1,5 @@
 #include "game.hpp"
+#include <iomanip>
 
 namespace interface {
 
@@ -141,6 +142,8 @@ void state_t::render_to(render::state_t *render)
 {
 	size_t w = window->getSize().x, h = window->getSize().y;
 	v2f_t x;
+	std::stringstream ss;
+	double fps;
 
 	if (select.selecting)
 		render->render_hlrect(select.rect, sf::Color(200, 100, 50));
@@ -160,6 +163,27 @@ void state_t::render_to(render::state_t *render)
 		render->render_text(x, em, entry.text, render::ALIGN_LEFT_TOP, sf::Color::White);
 		x[1] += em;
 	}
+
+	x = v2f_t(0.0f, h - em * 1.5);
+	ss << "S/T/E: ";
+	ss << render->stats.sectors << "/";
+	ss << render->stats.tiles << "/";
+	ss << render->stats.entities;
+	render->render_text(x, em, ss.str(), render::ALIGN_LEFT_TOP, sf::Color::White);
+
+	perf_hist_index = (perf_hist_index + 1) % count(perf_hist);
+	perf_hist[perf_hist_index] = 1.0 / render->dt;
+
+	fps = 0.0;
+	for (size_t i = 0; i < count(perf_hist); i++)
+		fps += perf_hist[i];
+	fps /= count(perf_hist);
+
+	x[1] -= em;
+	ss.str(std::string());
+	ss << std::fixed << std::setprecision(1);
+	ss << "FPS: " << fps;
+	render->render_text(x, em, ss.str(), render::ALIGN_LEFT_TOP, sf::Color::White);
 }
 
 } // namespace interface
diff --git a/src/render.cpp b/src/render.cpp
index 792d70d..f773f92 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -27,6 +27,10 @@ void state_t::begin_frame(double now_, double dt_)
 	now = now_;
 	dt = dt_;
 	window->clear();
+
+	stats.sectors = 0;
+	stats.tiles = 0;
+	stats.entities = 0;
 }
 
 void state_t::end_frame(void)
@@ -101,7 +105,11 @@ void state_t::render_sector(world::sector_t *sector)
 			text.setScale(0.005, 0.005);
 			window->draw(text);
 		}
+
+		stats.tiles++;
 	}
+
+	stats.sectors++;
 }
 
 void state_t::render(game::state_t *game)
@@ -141,6 +149,8 @@ void state_t::render(game::state_t *game)
 
 		if (debug_draw_cmodels)
 			drender_entity(ent);
+
+		stats.entities++;
 	}
 }
 
diff --git a/src/text.cpp b/src/text.cpp
index 898466f..0959277 100644
--- a/src/text.cpp
+++ b/src/text.cpp
@@ -8,8 +8,6 @@ static const char *human_names[] = {
 	"Kowalski", "Jackson", "Carter", "O'Neill", "Hammond", "Mitchell"
 };
 
-#define count(A) (sizeof(A) / sizeof((A)[0]))
-
 static std::string get_english(index_t index)
 {
 	switch (index) {