improve main game loop

1 files changed, 58 insertions, 50 deletions

diff --git a/dc/dc.c b/dc/dc.c
index 83cf1d9..0d69710 100644
--- a/dc/dc.c
+++ b/dc/dc.c
@@ -12,6 +12,59 @@
 
 #define TILE_SIZE 16
 
+struct ty_image img;
+
+void tick(void)
+{
+    double start = ty_get_time();
+
+    ty_draw_clear(TY_COLOR_BLACK);
+
+    for (int y = 0; y < SCREEN_HEIGHT; y += 16) {
+        for (int x = 0; x < SCREEN_WIDTH; x += 16) {
+            ty_draw_image(img, ty_vec2i(x, y));
+        }
+    }
+
+    ty_draw_rect(
+        (struct ty_recti){
+            SCREEN_WIDTH*0.5 + sin(ty_get_time() * 10) * 50 - 25,
+            SCREEN_HEIGHT*0.5-25,
+            50, 50,
+        },
+        TY_COLOR_RED
+    );
+
+    ty_draw_line(
+        ty_vec2i(0, 0),
+        ty_vec2i(100, 100),
+        ty_color(0xFF, 0xF0, 0x80)
+    );
+
+    ty_draw_line(
+        ty_vec2i(100, 0),
+        ty_vec2i(0, 100),
+        ty_color(0x80, 0xF0, 0xFF)
+    );
+
+    ty_draw_line(
+        ty_vec2i(150, 0),
+        ty_vec2i(150, 100),
+        ty_color(0x80, 0xF0, 0xFF)
+    );
+
+    ty_draw_line(
+        ty_vec2i(100, 50),
+        ty_vec2i(200, 50),
+        ty_color(0xFF, 0xF0, 0x80)
+    );
+
+    ty_draw_end();
+
+    double frame_time = ty_get_time() - start;
+    ty_log_debug("%g ms, %g FPS", frame_time * 1000, 1.0 / frame_time);
+}
+
 int main(void)
 {
     struct ty_hints hints = {
@@ -26,59 +79,14 @@ int main(void)
     void *data = qoi_read("test_img.qoi", &desc, 3);
     if (!data)
         ty_log_fatal(TY_ERR_IO, "failed to read image");
-    struct ty_image img = ty_create_image(desc.width, desc.height, data);
+    img = ty_create_image(desc.width, desc.height, data);
     free(data);
 
     while (ty_is_game_running()) {
-        clock_t start = clock();
-
-        ty_draw_clear(TY_COLOR_BLACK);
-
-        for (int y = 0; y < SCREEN_HEIGHT; y += 16) {
-            for (int x = 0; x < SCREEN_WIDTH; x += 16) {
-                ty_draw_image(img, ty_vec2i(x, y));
-            }
-        }
-
-        ty_draw_rect(
-            (struct ty_recti){
-                SCREEN_WIDTH*0.5 + sin(ty_get_time() * 10) * 50 - 25,
-                SCREEN_HEIGHT*0.5-25,
-                50, 50,
-            },
-            TY_COLOR_RED
-        );
-
-        ty_draw_line(
-            ty_vec2i(0, 0),
-            ty_vec2i(100, 100),
-            ty_color(0xFF, 0xF0, 0x80)
-        );
-
-        ty_draw_line(
-            ty_vec2i(100, 0),
-            ty_vec2i(0, 100),
-            ty_color(0x80, 0xF0, 0xFF)
-        );
-
-        ty_draw_line(
-            ty_vec2i(150, 0),
-            ty_vec2i(150, 100),
-            ty_color(0x80, 0xF0, 0xFF)
-        );
-
-        ty_draw_line(
-            ty_vec2i(100, 50),
-            ty_vec2i(200, 50),
-            ty_color(0xFF, 0xF0, 0x80)
-        );
-
-        ty_draw_end();
-        ty_tick();
-
-        ty_sleep(1000 / hints.ticrate);
-
-        ty_log_debug("%g ms", (float)(clock() - start) / CLOCKS_PER_SEC);
+        int ticks = ty_tick();
+        for (int i = 0; i < ticks; i++)
+            tick();
+        // ty_sleep(1000 / hints.ticrate);
     }
 
     ty_free_image(img);