fix missed examples in WebGPU update (#8553)

# Objective

- I missed a few examples in #8336 
- fixes #8556 
- fixes #8620

## Solution

- Update them

crates/bevy_core_pipeline/src/taa/mod.rs

@@ -60,7 +60,6 @@ impl Plugin for TemporalAntiAliasPlugin {
         let Ok(render_app) = app.get_sub_app_mut(RenderApp) else { return };
 
         render_app
-            .init_resource::<TAAPipeline>()
             .init_resource::<SpecializedRenderPipelines<TAAPipeline>>()
             .add_systems(ExtractSchedule, extract_taa_settings)
             .add_systems(
@@ -84,6 +83,12 @@ impl Plugin for TemporalAntiAliasPlugin {
                 ],
             );
     }
+
+    fn finish(&self, app: &mut App) {
+        let Ok(render_app) = app.get_sub_app_mut(RenderApp) else { return };
+
+        render_app.init_resource::<TAAPipeline>();
+    }
 }
 
 /// Bundle to apply temporal anti-aliasing.

examples/2d/mesh2d_manual.rs

@@ -277,15 +277,21 @@ impl Plugin for ColoredMesh2dPlugin {
             Shader::from_wgsl(COLORED_MESH2D_SHADER),
         );
 
-        // Register our custom draw function and pipeline, and add our render systems
+        // Register our custom draw function, and add our render systems
         app.get_sub_app_mut(RenderApp)
             .unwrap()
             .add_render_command::<Transparent2d, DrawColoredMesh2d>()
-            .init_resource::<ColoredMesh2dPipeline>()
             .init_resource::<SpecializedRenderPipelines<ColoredMesh2dPipeline>>()
             .add_systems(ExtractSchedule, extract_colored_mesh2d)
             .add_systems(Render, queue_colored_mesh2d.in_set(RenderSet::Queue));
     }
+
+    fn finish(&self, app: &mut App) {
+        // Register our custom pipeline
+        app.get_sub_app_mut(RenderApp)
+            .unwrap()
+            .init_resource::<ColoredMesh2dPipeline>();
+    }
 }
 
 /// Extract the [`ColoredMesh2d`] marker component into the render app

examples/shader/post_processing.rs

@@ -70,8 +70,6 @@ impl Plugin for PostProcessPlugin {
         };
 
         render_app
-            // Initialize the pipeline
-            .init_resource::<PostProcessPipeline>()
             // Bevy's renderer uses a render graph which is a collection of nodes in a directed acyclic graph.
             // It currently runs on each view/camera and executes each node in the specified order.
             // It will make sure that any node that needs a dependency from another node
@@ -99,6 +97,17 @@ impl Plugin for PostProcessPlugin {
                 ],
             );
     }
+
+    fn finish(&self, app: &mut App) {
+        // We need to get the render app from the main app
+        let Ok(render_app) = app.get_sub_app_mut(RenderApp) else {
+            return;
+        };
+
+        render_app
+            // Initialize the pipeline
+            .init_resource::<PostProcessPipeline>();
+    }
 }
 
 /// The post process node used for the render graph

examples/shader/texture_binding_array.rs

@@ -9,30 +9,17 @@ use bevy::{
         render_resource::{AsBindGroupError, PreparedBindGroup, *},
         renderer::RenderDevice,
         texture::FallbackImage,
+        RenderApp,
     },
 };
-use std::num::NonZeroU32;
+use std::{num::NonZeroU32, process::exit};
 
 fn main() {
     let mut app = App::new();
     app.add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest()));
 
-    let render_device = app.world.resource::<RenderDevice>();
-
-    // check if the device support the required feature
-    if !render_device
-        .features()
-        .contains(WgpuFeatures::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING)
-    {
-        error!(
-            "Render device doesn't support feature \
-            SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING, \
-            which is required for texture binding arrays"
-        );
-        return;
-    }
-
-    app.add_plugin(MaterialPlugin::<BindlessMaterial>::default())
+    app.add_plugin(GpuFeatureSupportChecker)
+        .add_plugin(MaterialPlugin::<BindlessMaterial>::default())
         .add_systems(Startup, setup)
         .run();
 }
@@ -42,6 +29,34 @@ const TILE_ID: [usize; 16] = [
     19, 23, 4, 33, 12, 69, 30, 48, 10, 65, 40, 47, 57, 41, 44, 46,
 ];
 
+struct GpuFeatureSupportChecker;
+
+impl Plugin for GpuFeatureSupportChecker {
+    fn build(&self, _app: &mut App) {}
+
+    fn finish(&self, app: &mut App) {
+        let Ok(render_app) = app.get_sub_app_mut(RenderApp) else {
+            return
+        };
+
+        let render_device = render_app.world.resource::<RenderDevice>();
+
+        // Check if the device support the required feature. If not, exit the example.
+        // In a real application, you should setup a fallback for the missing feature
+        if !render_device
+            .features()
+            .contains(WgpuFeatures::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING)
+        {
+            error!(
+                "Render device doesn't support feature \
+SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING, \
+which is required for texture binding arrays"
+            );
+            exit(1);
+        }
+    }
+}
+
 fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,