From 489c8c413ea93201d826fbd9000e30dd8a4c570d Mon Sep 17 00:00:00 2001
From: krzosa <krzosa.karol@gmail.com>
Date: Sat, 4 Jan 2025 11:24:01 +0100
Subject: [PATCH] w32 wait for events

---
 src/app/app_wasm.c  | 19 +++++--------------
 src/app/app_win32.c | 15 ++++++++++-----
 2 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/src/app/app_wasm.c b/src/app/app_wasm.c
index 2bdd40f..6bf21fb 100644
--- a/src/app/app_wasm.c
+++ b/src/app/app_wasm.c
@@ -4,7 +4,7 @@
 .sleeps properly when nothing is happening
 .replayable (that is you can serialize all the events, replay them back and get the same results)
 ..rendering and update decoupled
-..animations probably then should be in the rendering part
+..animations probably should be in the rendering part
 
 void app_update(app_event_t *events, i32 event_count) {
     update_result_t *state = NULL; // contains event
@@ -23,17 +23,6 @@ void app_update(app_event_t *events, i32 event_count) {
     }
 }
 
-while (true) {
-    app_event_t *events = NULL;
-    if (animating) {
-        events = poll_events(); // non-blocking
-    } else {
-        events = wait_for_events(); // blocking
-    }
-    app_update(events, event_count);
-
-    SwapBuffers(); // vsync block
-}
 
 */
 gb_wasm_export char wasm_temp_buff1[128] = {[127] = 0x13};
@@ -176,7 +165,7 @@ fn_wasm_export void wasm_key_up(char *key, b32 ctrl, b32 shift, b32 alt, b32 met
     }
 }
 
-fn_wasm_export void wasm_update(f64 time, f64 width, f64 height, f64 dpr) {
+fn_wasm_export b32 wasm_update(f64 time, f64 width, f64 height, f64 dpr) {
     wasm_time = time;
     wasm_delta_time = wasm_time - wasm_last_time;
 
@@ -199,11 +188,13 @@ fn_wasm_export void wasm_update(f64 time, f64 width, f64 height, f64 dpr) {
         ev->window_size = window_size;
     }
 
-    app_update(wasm_event_list);
+    b32 animating = app_update(wasm_event_list);
 
     ma_set0(tcx.temp);
     zero_struct(&wasm_event_list);
     wasm_last_time = wasm_time;
+
+    return animating;
 }
 
 fn_wasm_export void wasm_init(void) {
diff --git a/src/app/app_win32.c b/src/app/app_win32.c
index 5778442..43eb777 100644
--- a/src/app/app_win32.c
+++ b/src/app/app_win32.c
@@ -165,11 +165,17 @@ fn LRESULT CALLBACK w32_window_proc(HWND wnd, UINT msg, WPARAM wparam, LPARAM lp
     return 0;
 }
 
-app_event_list_t w32_get_events(ma_arena_t *arena) {
+app_event_list_t w32_get_events(ma_arena_t *arena, b32 wait) {
     w32_event_arena = arena;
-    memory_zero(&w32_event_list, sizeof(w32_event_list));
+    zero_struct(&w32_event_list);
 
     MSG msg;
+    if (wait) {
+        GetMessageW(&msg, NULL, 0, 0);
+        TranslateMessage(&msg);
+        DispatchMessageW(&msg);
+    }
+
     while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
         TranslateMessage(&msg);
         DispatchMessageW(&msg);
@@ -342,7 +348,7 @@ int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int n
     u64 missed_frames = 0;
     u64 frame = 0;
     for (;;) {
-        app_event_list_t event_list = w32_get_events(tcx.temp);
+        app_event_list_t event_list = w32_get_events(tcx.temp, false);
 
         for (app_event_t *ev = event_list.first; ev; ev = ev->next) {
             if (ev->kind == app_event_kind_key_down && ev->key == app_key_escape) {
@@ -363,11 +369,10 @@ int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int n
 
         // w32_present_canvas(&canvas);
 
+        ma_set0(tcx.temp);
         ///////////////////////////////
         // end of frame timings
 
-        ma_set0(tcx.temp);
-
         f64 time_update_partial = os_seconds_now() - time_frame_start;
         time_update = time_update_partial;
         if (time_update < time_delta) {