Implement HiDPI scaling

rust/crates/clean_flash_installer/src/main.rs

@@ -1,4 +1,4 @@
-#![windows_subsystem = "windows"]
+//#![windows_subsystem = "windows"]
 
 mod install_flags;
 mod install_form;
@@ -14,10 +14,16 @@ fn main() {
         clean_flash_common::update_checker::FLASH_VERSION
     );
 
+    // Query DPI before creating any window. The manifest already marks the process
+    // as per-monitor v2 DPI aware, so GetDpiForSystem returns the real hardware DPI.
+    let scale = clean_flash_ui::get_dpi_scale();
+    let phys_w = (WIDTH as f32 * scale).round() as usize;
+    let phys_h = (HEIGHT as f32 * scale).round() as usize;
+
     let mut window = Window::new(
         &title,
-        WIDTH,
-        HEIGHT,
+        phys_w,
+        phys_h,
         WindowOptions {
             resize: false,
             ..WindowOptions::default()
@@ -31,8 +37,9 @@ fn main() {
     // Cap at ~60 fps.
     window.set_target_fps(60);
 
-    let mut renderer = Renderer::new(WIDTH, HEIGHT);
-    let mut form = InstallForm::new();
+    // Renderer operates at physical resolution; the form layout is scaled accordingly.
+    let mut renderer = Renderer::new(phys_w, phys_h);
+    let mut form = InstallForm::new(scale);
 
     while window.is_open() && !window.is_key_down(Key::Escape) {
         let (mx, my) = window
@@ -43,7 +50,7 @@ fn main() {
         form.update_and_draw(&mut renderer, mx as i32, my as i32, mouse_down);
 
         window
-            .update_with_buffer(&renderer.buffer, WIDTH, HEIGHT)
+            .update_with_buffer(&renderer.buffer, phys_w, phys_h)
             .expect("Failed to update window buffer");
     }
 }