BREAKING(webgpu/unstable): Replace async .requestAdapterInfo() with sync .info (#24783)

Closes https://github.com/denoland/deno/issues/24779

Ref https://github.com/gpuweb/gpuweb/pull/4662

3 files changed, 12 insertions, 5 deletions

diff --git a/cli/tsc/dts/lib.deno_webgpu.d.ts b/cli/tsc/dts/lib.deno_webgpu.d.ts
index 12ef5e6c5..944af0e4c 100644
--- a/cli/tsc/dts/lib.deno_webgpu.d.ts
+++ b/cli/tsc/dts/lib.deno_webgpu.d.ts
@@ -123,10 +123,10 @@ declare type GPUPowerPreference = "low-power" | "high-performance";
 declare class GPUAdapter {
   readonly features: GPUSupportedFeatures;
   readonly limits: GPUSupportedLimits;
+  readonly info: GPUAdapterInfo;
   readonly isFallbackAdapter: boolean;
 
   requestDevice(descriptor?: GPUDeviceDescriptor): Promise<GPUDevice>;
-  requestAdapterInfo(): Promise<GPUAdapterInfo>;
 }
 
 /**
diff --git a/ext/webgpu/01_webgpu.js b/ext/webgpu/01_webgpu.js
index 15b82a8e3..2c30e47f0 100644
--- a/ext/webgpu/01_webgpu.js
+++ b/ext/webgpu/01_webgpu.js
@@ -423,6 +423,8 @@ class GPUAdapter {
   [_adapter];
   /** @type {bool} */
   [_invalid];
+  /** @type {GPUAdapterInfo | undefined} */
+  #adapterInfo;
 
   /** @returns {GPUSupportedFeatures} */
   get features() {
@@ -502,9 +504,9 @@ class GPUAdapter {
   }
 
   /**
-   * @returns {Promise<GPUAdapterInfo>}
+   * @returns {GPUAdapterInfo}
    */
-  requestAdapterInfo() {
+  get info() {
     webidl.assertBranded(this, GPUAdapterPrototype);
 
     if (this[_invalid]) {
@@ -513,6 +515,10 @@ class GPUAdapter {
       );
     }
 
+    if (this.#adapterInfo !== undefined) {
+      return this.#adapterInfo;
+    }
+
     const {
       vendor,
       architecture,
@@ -525,7 +531,8 @@ class GPUAdapter {
     adapterInfo[_architecture] = architecture;
     adapterInfo[_device] = device;
     adapterInfo[_description] = description;
-    return PromiseResolve(adapterInfo);
+    this.#adapterInfo = adapterInfo;
+    return adapterInfo;
   }
 
   [SymbolFor("Deno.privateCustomInspect")](inspect, inspectOptions) {
diff --git a/ext/webgpu/webgpu.idl b/ext/webgpu/webgpu.idl
index 07d9d60ec..d673ce77b 100644
--- a/ext/webgpu/webgpu.idl
+++ b/ext/webgpu/webgpu.idl
@@ -78,11 +78,11 @@ enum GPUPowerPreference {
 [Exposed=(Window, Worker), SecureContext]
 interface GPUAdapter {
     [SameObject] readonly attribute GPUSupportedFeatures features;
+    [SameObject] readonly attribute GPUAdapterInfo info;
     [SameObject] readonly attribute GPUSupportedLimits limits;
     readonly attribute boolean isFallbackAdapter;
 
     Promise<GPUDevice> requestDevice(optional GPUDeviceDescriptor descriptor = {});
-    Promise<GPUAdapterInfo> requestAdapterInfo();
 };
 
 dictionary GPUDeviceDescriptor