From 9619843cbed783774f9593e7ab6fc0b6efd4a420 Mon Sep 17 00:00:00 2001
From: Ulysse Cura <ulysse.cura@gmail.com>
Date: Tue, 4 Aug 2026 01:01:55 +0200
Subject: [PATCH] Changed time from ms to ns and showing fps to header bar when
 debug.

---
 src/display.c | 33 ++++++++++++++++++++++++++++++++-
 src/main.c    |  6 +++---
 2 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/src/display.c b/src/display.c
index d59f092..7de419d 100644
--- a/src/display.c
+++ b/src/display.c
@@ -3,6 +3,7 @@
 #include <SDL3/SDL.h>
 #include <stdlib.h>
 #include "asset_manager.h"
+#include "game.h"
 #include "errors.h"
 
 SDL_Window *window = NULL;
@@ -16,7 +17,7 @@ inline int display_init(void)
         return EXIT_FAILURE;
     }
 
-    if(!SDL_SetAppMetadata("2D_Engine", "1.0", "2D_Engine"))
+    if(!SDL_SetAppMetadata("2D_Engine", "1.0", "2D_Engine_SDL2_Core"))
     {
         error_printf("Failed to set app metadata : %s", SDL_GetError());
         return EXIT_FAILURE;
@@ -94,6 +95,36 @@ inline int display_clear(void)
 inline void display_update(void)
 {
     SDL_RenderPresent(renderer);
+
+#if DEBUG >= 1
+    float fps = 1000.0f / game.delta_time_ms;
+    static float max_fps_10s = 0.0f;
+    static float low_fps_10s = 10000000.0f;
+
+    if(fps > max_fps_10s) max_fps_10s = fps;
+    if(fps < low_fps_10s) low_fps_10s = fps;
+
+    static float fps_update_delta_time = 0.0f;
+    fps_update_delta_time += game.delta_time_ms;
+
+    if(fps_update_delta_time >= 100.0f)
+    {
+        fps_update_delta_time = 0.0f;
+        char title[100];
+        sprintf(title, "2D_Engine | cur: %.2ffps | max: %.2ffps | low: %.2ffps", fps, max_fps_10s, low_fps_10s);
+        SDL_SetWindowTitle(window, title);
+    }
+
+    static float fps_max_low_update_delta_time = 0.0f;
+    fps_max_low_update_delta_time += game.delta_time_ms;
+
+    if(fps_max_low_update_delta_time > 10000.0f)
+    {
+        fps_max_low_update_delta_time = 0.0f;
+        max_fps_10s = 0.0f;
+        low_fps_10s = 10000000.0f;
+    }
+#endif // DEBUG >= 1
 }
 
 int display_draw_texture(texture_t *texture, rect_t *src_rect, rect_t *dst_rect, bool flip)
diff --git a/src/main.c b/src/main.c
index 69e4c75..02d9a04 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,9 +7,9 @@ game_t game;
 
 static inline void update_time(void)
 {
-    static uint32_t last_clock_state = 0;
-    uint32_t start_clock = SDL_GetTicks();
-    game.delta_time_ms = (float)(start_clock - last_clock_state);
+    static uint64_t last_clock_state = 0;
+    uint64_t start_clock = SDL_GetTicksNS();
+    game.delta_time_ms = SDL_NS_TO_MS((float)(start_clock - last_clock_state));
     last_clock_state = start_clock;
 }