Graphical fixes

src/window/game_screen.rs

@@ -171,14 +171,24 @@ struct GameScreenCallback {
 impl egui_wgpu::CallbackTrait for GameScreenCallback {
     fn paint(
         &self,
-        _info: egui::PaintCallbackInfo,
+        info: egui::PaintCallbackInfo,
         render_pass: &mut wgpu::RenderPass<'static>,
         callback_resources: &egui_wgpu::CallbackResources,
     ) {
         let resources: &SharedGameScreenResources = callback_resources.get().unwrap();
-        // TODO: maintain aspect ratio
+        let viewport = info.viewport_in_pixels();
+        let left = viewport.left_px as f32;
+        let top = viewport.top_px as f32;
+        let width = viewport.width_px as f32;
+        let height = viewport.height_px as f32;
+        let aspect_ratio = 384.0 / 224.0;
+        let w = width.min(height * aspect_ratio);
+        let h = height.min(width / aspect_ratio);
+        let x = left + (width - w) / 2.0;
+        let y = top + (height - h) / 2.0;
         render_pass.set_pipeline(&resources.pipeline);
         render_pass.set_bind_group(0, &self.bind_group, &[]);
+        render_pass.set_viewport(x, y, w, h, 0.0, 1.0);
         render_pass.draw(0..6, 0..1);
     }
 }