core: indirect draw passes, device feature list, drop handles-specific bundle heuristics

Amp-Thread-ID: https://ampcode.com/threads/T-01a0b2dd-db32-712d-99ce-12ce4a86d979
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

core/renderer/wgpu.rs

@@ -8,9 +8,19 @@ pub struct Wgpu {
     pub width: u32,
     pub height: u32,
     pub timestamp_queries: bool,
+    /// Optional features the device was created with, in WebGPU spelling.
+    pub features: Vec<&'static str>,
     pub adapter: String,
 }
 
+const OPTIONAL_FEATURES: [(wgpu::Features, &str); 2] = [
+    (wgpu::Features::TIMESTAMP_QUERY, "timestamp-query"),
+    (
+        wgpu::Features::INDIRECT_FIRST_INSTANCE,
+        "indirect-first-instance",
+    ),
+];
+
 impl Wgpu {
     pub async fn new(canvas: web_sys::OffscreenCanvas) -> Result<Self, String> {
         let width = canvas.width();
@@ -33,7 +43,12 @@ impl Wgpu {
             })
             .await
             .map_err(|_| "WEBGPU_UNAVAILABLE")?;
-        let required_features = adapter.features() & wgpu::Features::TIMESTAMP_QUERY;
+        let required_features = OPTIONAL_FEATURES
+            .iter()
+            .fold(wgpu::Features::empty(), |features, (feature, _)| {
+                features | *feature
+            })
+            & adapter.features();
         let info = adapter.get_info();
         let adapter_name = if info.name.is_empty() {
             format!("{:?} · {:?}", info.device_type, info.backend)
@@ -65,6 +80,11 @@ impl Wgpu {
             width,
             height,
             timestamp_queries: required_features.contains(wgpu::Features::TIMESTAMP_QUERY),
+            features: OPTIONAL_FEATURES
+                .iter()
+                .filter(|(feature, _)| required_features.contains(*feature))
+                .map(|(_, name)| *name)
+                .collect(),
             adapter: adapter_name,
         })
     }