Stop using Vulkan on Windows

src/app.rs

@@ -251,17 +251,23 @@ impl Viewport {
         });
         egui_extras::install_image_loaders(&ctx);
 
-        let mut painter = egui_wgpu::winit::Painter::new(
-            ctx.clone(),
-            egui_wgpu::WgpuConfiguration {
+        #[allow(unused_mut)]
+        let mut wgpu_config = egui_wgpu::WgpuConfiguration {
             present_mode: wgpu::PresentMode::AutoNoVsync,
             ..egui_wgpu::WgpuConfiguration::default()
-            },
-            1,
-            None,
-            false,
-            true,
-        );
+        };
+        #[cfg(windows)]
+        {
+            if let egui_wgpu::WgpuSetup::CreateNew {
+                supported_backends, ..
+            } = &mut wgpu_config.wgpu_setup
+            {
+                *supported_backends -= wgpu::Backends::VULKAN;
+            }
+        }
+
+        let mut painter =
+            egui_wgpu::winit::Painter::new(ctx.clone(), wgpu_config, 1, None, false, true);
 
         let mut info = ViewportInfo::default();
         let mut builder = app.initial_viewport();