Resize viewport framebuffer

editor/src/main.rs

@@ -113,7 +113,7 @@ impl Application {
 
                 {
                     puffin::profile_scope!("Main render");
-                    self.render_state.update_viewport(&mut self.viewport);
+                    self.render_state.update_viewport(&mut self.egui_rp, &mut self.viewport);
                     self.render_state.render();
                 }
 

editor/src/render.rs

@@ -226,9 +226,32 @@ impl RenderState {
         }
     }
 
-    pub fn update_viewport(&mut self, viewport: &mut ViewportWidget) {
+    pub fn update_viewport(
+        &mut self,
+        egui_rp: &mut egui_wgpu_backend::RenderPass,
+        widget: &mut ViewportWidget,
+    ) {
         let mut store = self.resources.get_mut::<ViewportStore>().unwrap();
-        store.viewport.camera = viewport.flycam.get_camera();
+        let mut viewport = &mut store.viewport;
+        viewport.camera = widget.flycam.get_camera();
+
+        if viewport.textures.width != widget.width || viewport.textures.height != widget.height {
+            viewport.textures = OffscreenTextures::new(
+                &viewport.device,
+                widget.width,
+                widget.height,
+                viewport.output_format,
+            );
+
+            egui_rp
+                .update_egui_texture_from_wgpu_texture(
+                    &viewport.device,
+                    &viewport.textures.output_view,
+                    wgpu::FilterMode::Nearest,
+                    viewport.egui_texture,
+                )
+                .unwrap();
+        }
     }
 
     pub fn render(&mut self) {

editor/src/ui.rs

@@ -130,6 +130,8 @@ impl UserInterface {
 pub struct ViewportWidget {
     pub texture: egui::TextureId,
     pub flycam: Flycam,
+    pub width: u32,
+    pub height: u32,
 }
 
 impl ViewportWidget {
@@ -137,6 +139,8 @@ impl ViewportWidget {
         Self {
             texture,
             flycam: Flycam::new(0.002, 10.0, 0.25),
+            width: 640,
+            height: 480,
         }
     }
 }
@@ -149,6 +153,9 @@ impl egui::Widget for &mut ViewportWidget {
         let sense = egui::Sense::click_and_drag();
         let response = ui.interact(rect, id, sense);
 
+        self.width = rect.width().round() as u32;
+        self.height = rect.height().round() as u32;
+
         use egui::{pos2, Color32, Mesh, Rect, Shape};
         let mut mesh = Mesh::with_texture(self.texture);
         let uv = Rect::from_min_max(pos2(0.0, 0.0), pos2(1.0, 1.0));
@@ -193,8 +200,7 @@ impl egui::Widget for &mut ViewportWidget {
             self.flycam.defocus();
         }
 
-        println!("{:#?}", self.flycam);
-
+        self.flycam.resize(self.width, self.height);
         self.flycam.update();
 
         response