Merge branch 'master' into multiples_viewports

crates/egui-wgpu/src/winit.rs

@@ -111,7 +111,7 @@ impl Painter {
     ) -> Self {
         let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
             backends: configuration.supported_backends,
-            dx12_shader_compiler: Default::default(),
+            ..Default::default()
         });
 
         Self {
@@ -566,6 +566,7 @@ impl Painter {
                 });
 
             let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+                label: Some("egui_render"),
                 color_attachments: &[Some(wgpu::RenderPassColorAttachment {
                     view,
                     resolve_target,
@@ -576,7 +577,7 @@ impl Painter {
                             b: clear_color[2] as f64,
                             a: clear_color[3] as f64,
                         }),
-                        store: true,
+                        store: wgpu::StoreOp::Store,
                     },
                 })],
                 depth_stencil_attachment: self.depth_texture_view.get(&viewport_id).map(|view| {
@@ -584,12 +585,15 @@ impl Painter {
                         view,
                         depth_ops: Some(wgpu::Operations {
                             load: wgpu::LoadOp::Clear(1.0),
-                            store: true,
+                            // It is very unlikely that the depth buffer is needed after egui finished rendering
+                            // so no need to store it. (this can improve performance on tiling GPUs like mobile chips or Apple Silicon)
+                            store: wgpu::StoreOp::Discard,
                         }),
                         stencil_ops: None,
                     }
                 }),
-                label: Some("egui_render"),
+                timestamp_writes: None,
+                occlusion_query_set: None,
             });
 
             renderer.render(&mut render_pass, clipped_primitives, &screen_descriptor);