add --scale option

uw8-window/src/gpu/mod.rs

@@ -41,7 +41,10 @@ impl Window {
         async fn create(window_config: WindowConfig) -> Result<Window> {
             let event_loop = EventLoop::new();
             let window = WindowBuilder::new()
-                .with_inner_size(PhysicalSize::new(640u32, 480))
+                .with_inner_size(PhysicalSize::new(
+                    (320. * window_config.scale).round() as u32,
+                    (240. * window_config.scale).round() as u32,
+                ))
                 .with_min_inner_size(PhysicalSize::new(320u32, 240))
                 .with_title("MicroW8")
                 .with_fullscreen(if window_config.fullscreen {
@@ -72,7 +75,13 @@ impl Window {
 
             let surface_config = wgpu::SurfaceConfiguration {
                 present_mode: wgpu::PresentMode::AutoNoVsync,
-                ..surface.get_default_config(&adapter, window.inner_size().width, window.inner_size().height).expect("Surface incompatible with adapter")
+                ..surface
+                    .get_default_config(
+                        &adapter,
+                        window.inner_size().width,
+                        window.inner_size().height,
+                    )
+                    .expect("Surface incompatible with adapter")
             };
 
             let filter: Box<dyn Filter> = create_filter(
@@ -354,7 +363,7 @@ impl PaletteScreenMode {
             format: wgpu::TextureFormat::R8Uint,
             usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
             label: None,
-            view_formats: &[]
+            view_formats: &[],
         });
 
         let palette_texture = device.create_texture(&wgpu::TextureDescriptor {
@@ -369,7 +378,7 @@ impl PaletteScreenMode {
             format: wgpu::TextureFormat::Rgba8UnormSrgb,
             usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
             label: None,
-            view_formats: &[]
+            view_formats: &[],
         });
 
         let screen_texture = device.create_texture(&wgpu::TextureDescriptor {
@@ -384,7 +393,7 @@ impl PaletteScreenMode {
             format: wgpu::TextureFormat::Rgba8UnormSrgb,
             usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::RENDER_ATTACHMENT,
             label: None,
-            view_formats: &[]
+            view_formats: &[],
         });
 
         let framebuffer_texture_view =

uw8-window/src/lib.rs

@@ -15,7 +15,7 @@ struct FpsCounter {
 }
 
 impl Window {
-    pub fn new(config: WindowConfig) -> Result<Window> {
+    pub fn new(mut config: WindowConfig) -> Result<Window> {
         let fps_counter = if config.fps_counter {
             Some(FpsCounter {
                 start: Instant::now(),
@@ -24,6 +24,7 @@ impl Window {
         } else {
             None
         };
+        config.scale = config.scale.max(1.).min(20.);
         if config.enable_gpu {
             match gpu::Window::new(config) {
                 Ok(window) => {
@@ -71,6 +72,7 @@ pub struct WindowConfig {
     filter: u32,
     fullscreen: bool,
     fps_counter: bool,
+    scale: f32,
 }
 
 impl Default for WindowConfig {
@@ -80,6 +82,7 @@ impl Default for WindowConfig {
             filter: 5,
             fullscreen: false,
             fps_counter: false,
+            scale: 2.,
         }
     }
 }
@@ -102,6 +105,10 @@ impl WindowConfig {
         }
         self.fullscreen = args.contains("--fullscreen");
         self.fps_counter = args.contains("--fps");
+        self.scale = args
+            .opt_value_from_str("--scale")
+            .unwrap()
+            .unwrap_or(self.scale);
     }
 }