Mercurial > hg > ascension / changeset

--- a/src/ascension/context.h	Mon Jun 23 20:38:21 2025 +0200
+++ b/src/ascension/context.h	Mon Jun 23 21:07:31 2025 +0200
@@ -61,6 +61,8 @@
     AscFont active_font;
     unsigned char active_window;
     asc_col4i ink;
+    float frame_rate;
+    float frame_factor;
     uint64_t frame_nanos;
     uint64_t total_nanos;
 } AscContext;

--- a/src/context.c	Mon Jun 23 20:38:21 2025 +0200
+++ b/src/context.c	Mon Jun 23 21:07:31 2025 +0200
@@ -198,12 +198,22 @@
     }
 
     // compute frame time
+    // TODO: think about whether frame rate is actually a per-window thing
+    //       the answer is hopefully NO, because that would mean behaviors are also a per-window thing
     uint64_t frame_nanos, ns;
     do {
         ns = asc_nanos();
         frame_nanos = ns - asc_context.total_nanos;
     } while (frame_nanos == 0);
     asc_context.frame_nanos = frame_nanos;
+    unsigned long long fps_1k = asc_seconds(1000) / frame_nanos;
+    asc_context.frame_rate = (float)fps_1k / 1000.f;
+    if (asc_context.frame_rate < 5) {
+        // effectively stop the world when the frame rate drops too low
+        asc_context.frame_factor = 0;
+    } else {
+        asc_context.frame_factor = 1.f / asc_context.frame_rate;
+    }
     asc_context.total_nanos = ns;
 
     // sync the windows

--- a/test/snake/snake.c	Mon Jun 23 20:38:21 2025 +0200
+++ b/test/snake/snake.c	Mon Jun 23 21:07:31 2025 +0200
@@ -57,12 +57,10 @@
 
 static void update_fps_counter(AscBehavior *behavior) {
     AscSceneNode *node = behavior->node;
-    // update text
-    static uint64_t last_fps = 0;
-    uint64_t fps = asc_seconds(1) / asc_context.frame_nanos;
-    if (fps != last_fps) {
-        last_fps = fps;
-        asc_text_printf(node, "%"PRIu64" FPS", fps);
+    static float last_fps = 0.f;
+    if (fabsf(asc_context.frame_rate - last_fps) > 1) {
+        last_fps = asc_context.frame_rate;
+        asc_text_printf(node, "%.2f FPS", asc_context.frame_rate);
     }
 }