Update Sine Wave example

1 files changed, 42 insertions, 7 deletions

diff --git a/examples/sinewave.c b/examples/sinewave.c
index 6beed29..59d1161 100755
--- a/examples/sinewave.c
+++ b/examples/sinewave.c
@@ -25,21 +25,56 @@ gcc                                 \
 exit $? # */
 #endif
 
-#include "../reduced_system_layer.c"
+#include "../graphics.c"
+
+i64 time_0        = 0;
+i64 audio_samples = 0;
+
+f32 frames[AUDIO_SAMPLE_RATE * AUDIO_NUM_CHANNELS] = {0};
+
+b8 ui_button(f64 x, f64 y, f64 width, f64 height) {
+  b8 has_cursor = platform.cursor_x >= x && platform.cursor_x < x + width &&
+                  platform.cursor_y >= y && platform.cursor_y < y + height;
+
+  b8 is_pressed = has_cursor && platform.key_down[BUTTON_LEFT];
+
+  if (is_pressed)
+    fill_rectangle(OP_SET, 0xffffff, x, y, width, height);
+  else if (has_cursor)
+    fill_rectangle(OP_SET, 0xa0a000, x, y, width, height);
+  else
+    fill_rectangle(OP_SET, 0x808030, x, y, width, height);
+
+  return has_cursor && platform.key_pressed[BUTTON_LEFT];
+}
 
 void update_and_render_frame(void) {
-  //  Nothing
+  p_handle_events();
+
+  fill_rectangle(OP_SET, 0x202020, 0, 0, platform.frame_width, platform.frame_height);
+
+  if (ui_button(100, 100, 200, 200))
+    p_queue_sound(0, AUDIO_SAMPLE_RATE, frames);
+
+  i64 samples_elapsed = ((p_time() - time_0) * AUDIO_SAMPLE_RATE) / 1000 - audio_samples;
+  audio_samples      += samples_elapsed;
+
+  p_handle_audio(samples_elapsed);
+  p_render_frame();
+  p_sleep_for(0);
 }
 
 i32 main(i32 argc, c8 **argv) {
   (void) argc;
   (void) argv;
 
-  platform.graceful_exit = 1;
+  platform = (Platform) {
+    .title         = "Sine Wave",
+    .graceful_exit = 1,
+  };
 
   f64 frequency = 440. * 4;
 
-  f32 frames[AUDIO_SAMPLE_RATE * AUDIO_NUM_CHANNELS];
   for (i64 i = 0; i < AUDIO_SAMPLE_RATE; ++i) {
     f64 t = ((f64) i) / AUDIO_SAMPLE_RATE;
     f64 x = sin(t * frequency);
@@ -51,8 +86,8 @@ i32 main(i32 argc, c8 **argv) {
     frames[i * 2 + 1] = (f32) x * .5;
   }
 
-  p_queue_sound(0, AUDIO_SAMPLE_RATE, frames);
-  p_handle_audio(AUDIO_SAMPLE_RATE);
-  p_cleanup();
+  time_0 = p_time();
+
+  p_event_loop();
   return 0;
 }