[add] a resize call to the render api.

Author: vmarcella

crates/lambda-platform/src/gfx/assembler.rs

@@ -1,3 +1,5 @@
+//! Primitive assembly for the graphics pipeline.
+
 use gfx_hal::pso;
 
 /// PrimitiveAssemblerBuilder for preparing PrimitiveAssemblers to use in the

crates/lambda-platform/src/gfx/surface.rs

@@ -24,6 +24,7 @@ impl SurfaceBuilder {
     return Self { name: None };
   }
 
+  /// Set the name of the surface.
   pub fn with_name(mut self, name: &str) -> Self {
     self.name = Some(name.to_string());
     return self;
@@ -161,6 +162,7 @@ impl SwapchainBuilder {
     return Self { size: (480, 360) };
   }
 
+  /// Set the size of the swapchain for the surface image.
   pub fn with_size(mut self, width: u32, height: u32) -> Self {
     self.size = (width, height);
     return self;
@@ -298,20 +300,14 @@ pub mod internal {
     return surface.frame_buffer_attachment.clone();
   }
 
-  pub fn surface_for<RenderBackend: gfx_hal::Backend>(
-    surface: &mut super::Surface<RenderBackend>,
-  ) -> &mut RenderBackend::Surface {
-    return &mut surface.gfx_hal_surface;
-  }
-
   /// Borrow the surface and take the image. This internal function is used for
   /// rendering and composes surface_for + take image.
   pub fn borrow_surface_and_take_image<RenderBackend: gfx_hal::Backend>(
     surface: &mut super::Surface<RenderBackend>,
   ) -> (&mut RenderBackend::Surface, <RenderBackend::Surface as PresentationSurface<RenderBackend>>::SwapchainImage){
     return (
       &mut surface.gfx_hal_surface,
-      surface.image.take().expect(""),
+      surface.image.take().expect("Surface image is not present"),
     );
   }
 }

lambda/src/core/render/mod.rs

@@ -323,6 +323,15 @@ impl RenderContext {
       None => {}
     }
   }
+
+  pub fn resize(&mut self, width: u32, height: u32) {
+    let swapchain = SwapchainBuilder::new()
+      .with_size(width, height)
+      .build(&self.gpu, &self.surface);
+    Rc::get_mut(&mut self.surface)
+      .expect("Failed to acquire the surface to resize during")
+      .apply_swapchain(&self.gpu, swapchain, 1_000_000_000);
+  }
 }
 
 type PlatformRenderCommand = Command<internal::RenderBackend>;

lambda/src/runtimes/mod.rs

@@ -153,6 +153,11 @@ impl Runtime for GenericRuntime {
             });
           }
           WinitWindowEvent::Resized(dims) => {
+            active_render_api
+              .as_mut()
+              .unwrap()
+              .resize(dims.width, dims.height);
+
             publisher.publish_event(Events::Window {
               event: WindowEvent::Resize {
                 width: dims.width,
@@ -162,6 +167,11 @@ impl Runtime for GenericRuntime {
             })
           }
           WinitWindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
+            active_render_api
+              .as_mut()
+              .unwrap()
+              .resize(new_inner_size.width, new_inner_size.height);
+
             publisher.publish_event(Events::Window {
               event: WindowEvent::Resize {
                 width: new_inner_size.width,

tools/lambda_rs_demo/src/main.rs

@@ -41,6 +41,8 @@ pub struct DemoComponent {
   vertex_shader: Shader,
   render_pass: Option<Rc<RenderPass>>,
   render_pipeline: Option<Rc<RenderPipeline>>,
+  width: u32,
+  height: u32,
 }
 
 impl Component<Events> for DemoComponent {
@@ -61,6 +63,8 @@ impl Component<Events> for DemoComponent {
       Events::Window { event, issued_at } => match event {
         WindowEvent::Resize { width, height } => {
           println!("Window resized to {}x{}", width, height);
+          self.width = *width;
+          self.height = *height;
         }
         WindowEvent::Close => {
           println!("Window closed");
@@ -134,7 +138,8 @@ impl RenderableComponent<Events> for DemoComponent {
     _render_context: &mut lambda::core::render::RenderContext,
     _last_render: &std::time::Duration,
   ) -> Vec<RenderCommand> {
-    let viewport = viewport::ViewportBuilder::new().build(800, 600);
+    let viewport =
+      viewport::ViewportBuilder::new().build(self.width, self.height);
 
     // This array of commands will be executed in linear order
     return vec![
@@ -206,6 +211,8 @@ impl Default for DemoComponent {
       triangle_vertex: fs,
       render_pass: None,
       render_pipeline: None,
+      width: 800,
+      height: 600,
     };
   }
 }