From 38533c81e7b7ebfc5f281c2523188aeaa38d09c3 Mon Sep 17 00:00:00 2001
From: Berke Güzel <wenekar1@gmail.com>
Date: Tue, 13 Oct 2026 15:41:39 +0300
Subject: Drop the app state struct from the hello example

hello only tracked a failure flag, so keep it as a file-scope static like
simple_window and leave yasl_app_desc.userdata unset.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 examples/hello.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

(limited to 'examples')

diff --git a/examples/hello.c b/examples/hello.c
index ded4235..1761e04 100644
--- a/examples/hello.c
+++ b/examples/hello.c
@@ -3,17 +3,16 @@
 
 #include <stdio.h>
 
-struct app {
-    bool failed;
-};
+static bool failed;
 
 static enum yasl_app_result init(void *ud, struct yasl_display *display)
 {
+    (void)ud;
     struct yasl_window_spec spec = {.title = "Hello YASL", .size = {640, 480}};
     struct yasl_surface *surface = yasl_surface_create_toplevel(display, &spec);
     if (!surface) {
         perror("yasl_surface_create_toplevel");
-        ((struct app *)ud)->failed = true;
+        failed = true;
         return YASL_APP_QUIT;
     }
     yasl_surface_request_frame(surface);
@@ -28,29 +27,27 @@ static enum yasl_app_result event(void *ud, const struct yasl_event *event)
 
 static void draw(void *ud, struct yasl_surface *surface, struct yasl_frame_context *frame)
 {
-    struct app *app = ud;
+    (void)ud;
     size_t count = (size_t)frame->size.x * frame->size.y;
     for (size_t i = 0; i < count; i++)
         frame->cpu.pixels[i] = 0xff306090; /* Opaque premultiplied ARGB. */
 
     if (!yasl_frame_present_cpu(frame, NULL, 0)) {
         fprintf(stderr, "Could not present the draw target\n");
-        app->failed = true;
+        failed = true;
     }
-    if (app->failed) yasl_surface_destroy(surface);
+    if (failed) yasl_surface_destroy(surface);
 }
 
 int main(void)
 {
-    struct app app = {0};
     struct yasl_app_desc desc = {
         .app_id = "org.example.hello",
-        .userdata = &app,
         .init = init,
         .event = event,
         .frame = draw,
     };
     int result = yasl_run(&desc);
     if (result) fprintf(stderr, "Could not run the application\n");
-    return result || app.failed ? 1 : 0;
+    return result || failed ? 1 : 0;
 }
-- 
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