tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Instance.h (2795B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef GPU_INSTANCE_H_
      7 #define GPU_INSTANCE_H_
      8 
      9 #include "ObjectModel.h"
     10 #include "mozilla/AlreadyAddRefed.h"
     11 #include "mozilla/RefPtr.h"
     12 #include "mozilla/dom/WebGPUBinding.h"
     13 #include "mozilla/layers/BuildConstants.h"
     14 #include "nsCOMPtr.h"
     15 
     16 namespace mozilla {
     17 class ErrorResult;
     18 namespace dom {
     19 class Promise;
     20 struct GPURequestAdapterOptions;
     21 }  // namespace dom
     22 
     23 namespace webgpu {
     24 class Adapter;
     25 class GPUAdapter;
     26 class Instance;
     27 class WebGPUChild;
     28 
     29 class WGSLLanguageFeatures final : public nsWrapperCache,
     30                                   public ChildOf<Instance> {
     31 public:
     32  GPU_DECL_CYCLE_COLLECTION(WGSLLanguageFeatures)
     33 
     34 public:
     35  explicit WGSLLanguageFeatures(Instance* const aParent) : ChildOf(aParent) {}
     36 
     37  void Add(const nsAString& feature, ErrorResult& aRv) {
     38    dom::WGSLLanguageFeatures_Binding::SetlikeHelpers::Add(this, feature, aRv);
     39  }
     40 
     41 protected:
     42  virtual ~WGSLLanguageFeatures() = default;
     43 
     44 public:
     45  JSObject* WrapObject(JSContext* aCx,
     46                       JS::Handle<JSObject*> aGivenProto) override {
     47    return dom::WGSLLanguageFeatures_Binding::Wrap(aCx, this, aGivenProto);
     48  }
     49 };
     50 
     51 class Instance final : public nsWrapperCache {
     52 public:
     53  GPU_DECL_CYCLE_COLLECTION(Instance)
     54  GPU_DECL_JS_WRAP(Instance)
     55 
     56  nsIGlobalObject* GetParentObject() const { return mOwner; }
     57 
     58  static bool PrefEnabled(JSContext* aCx, JSObject* aObj);
     59  static bool ExternalTexturePrefEnabled(JSContext* aCx, JSObject* aObj);
     60 
     61  static already_AddRefed<Instance> Create(nsIGlobalObject* aOwner);
     62 
     63  already_AddRefed<dom::Promise> RequestAdapter(
     64      const dom::GPURequestAdapterOptions& aOptions, ErrorResult& aRv);
     65 
     66  dom::GPUTextureFormat GetPreferredCanvasFormat() const {
     67    // Changing implementation in a way that increases fingerprinting surface?
     68    // Please create a bug in [Core::Privacy: Anti
     69    // Tracking](https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Privacy%3A%20Anti-Tracking)
     70    if (kIsAndroid) {
     71      return dom::GPUTextureFormat::Rgba8unorm;
     72    }
     73    return dom::GPUTextureFormat::Bgra8unorm;
     74  };
     75 
     76 private:
     77  explicit Instance(nsIGlobalObject* aOwner);
     78  virtual ~Instance() = default;
     79 
     80  nsCOMPtr<nsIGlobalObject> mOwner;
     81  RefPtr<WGSLLanguageFeatures> mWgslLanguageFeatures;
     82 
     83 public:
     84  already_AddRefed<WGSLLanguageFeatures> WgslLanguageFeatures() const {
     85    RefPtr<WGSLLanguageFeatures> features = mWgslLanguageFeatures;
     86    return features.forget();
     87  }
     88 };
     89 
     90 }  // namespace webgpu
     91 }  // namespace mozilla
     92 
     93 #endif  // GPU_INSTANCE_H_