tor-browser

The Tor Browser
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CanvasContext.h (4406B)

      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_CanvasContext_H_
      7 #define GPU_CanvasContext_H_
      8 
      9 #include "ObjectModel.h"
     10 #include "mozilla/layers/LayersTypes.h"
     11 #include "mozilla/webgpu/WebGPUTypes.h"
     12 #include "mozilla/webrender/WebRenderAPI.h"
     13 #include "nsICanvasRenderingContextInternal.h"
     14 #include "nsWrapperCache.h"
     15 
     16 namespace mozilla {
     17 namespace dom {
     18 class OwningHTMLCanvasElementOrOffscreenCanvas;
     19 class Promise;
     20 struct GPUCanvasConfiguration;
     21 enum class GPUTextureFormat : uint8_t;
     22 }  // namespace dom
     23 namespace webgpu {
     24 class Adapter;
     25 class Texture;
     26 
     27 class CanvasContext final : public nsICanvasRenderingContextInternal,
     28                            public nsWrapperCache {
     29 private:
     30  virtual ~CanvasContext();
     31 
     32 public:
     33  // nsISupports interface + CC
     34  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
     35  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(CanvasContext)
     36 
     37  CanvasContext();
     38 
     39  JSObject* WrapObject(JSContext* aCx,
     40                       JS::Handle<JSObject*> aGivenProto) override;
     41 
     42 public:  // nsICanvasRenderingContextInternal
     43  int32_t GetWidth() override { return mCanvasSize.width; }
     44  int32_t GetHeight() override { return mCanvasSize.height; }
     45 
     46  NS_IMETHOD SetDimensions(int32_t aWidth, int32_t aHeight) override;
     47  NS_IMETHOD InitializeWithDrawTarget(
     48      nsIDocShell* aShell, NotNull<gfx::DrawTarget*> aTarget) override {
     49    return NS_OK;
     50  }
     51 
     52  bool UpdateWebRenderCanvasData(mozilla::nsDisplayListBuilder* aBuilder,
     53                                 WebRenderCanvasData* aCanvasData) override;
     54 
     55  bool InitializeCanvasRenderer(nsDisplayListBuilder* aBuilder,
     56                                layers::CanvasRenderer* aRenderer) override;
     57  mozilla::UniquePtr<uint8_t[]> GetImageBuffer(
     58      mozilla::CanvasUtils::ImageExtraction aExtractionBehavior,
     59      int32_t* out_format, gfx::IntSize* out_imageSize) override;
     60  NS_IMETHOD GetInputStream(
     61      const char* aMimeType, const nsAString& aEncoderOptions,
     62      mozilla::CanvasUtils::ImageExtraction aExtractionBehavior,
     63      const nsACString& aRandomizationKey, nsIInputStream** aStream) override;
     64  already_AddRefed<gfx::SourceSurface> GetSurfaceSnapshot(
     65      gfxAlphaType* aOutAlphaType) override;
     66 
     67  void SetOpaqueValueFromOpaqueAttr(bool aOpaqueAttrValue) override {}
     68  bool GetIsOpaque() override;
     69 
     70  void ResetBitmap() override { Unconfigure(); }
     71 
     72  void MarkContextClean() override {}
     73 
     74  NS_IMETHOD Redraw(const gfxRect& aDirty) override { return NS_OK; }
     75 
     76  void DidRefresh() override {}
     77 
     78  void MarkContextCleanForFrameCapture() override {}
     79  Watchable<FrameCaptureState>* GetFrameCaptureState() override {
     80    return nullptr;
     81  }
     82 
     83  Maybe<layers::SurfaceDescriptor> GetFrontBuffer(WebGLFramebufferJS*,
     84                                                  const bool) override;
     85 
     86  already_AddRefed<layers::FwdTransactionTracker> UseCompositableForwarder(
     87      layers::CompositableForwarder* aForwarder) override;
     88 
     89  bool IsOffscreenCanvas() { return !!mOffscreenCanvas; }
     90 
     91 public:
     92  void GetCanvas(dom::OwningHTMLCanvasElementOrOffscreenCanvas&) const;
     93 
     94  void Configure(const dom::GPUCanvasConfiguration& aConfig, ErrorResult& aRv);
     95  void Unconfigure();
     96 
     97  void GetConfiguration(dom::Nullable<dom::GPUCanvasConfiguration>& aRv);
     98  RefPtr<Texture> GetCurrentTexture(ErrorResult& aRv);
     99  void MaybeQueueSwapChainPresent();
    100  Maybe<layers::SurfaceDescriptor> SwapChainPresent();
    101  void ForceNewFrame();
    102  void InvalidateCanvasContent();
    103 
    104 private:
    105  gfx::IntSize mCanvasSize;
    106  std::unique_ptr<dom::GPUCanvasConfiguration> mConfiguration;
    107  bool mPendingSwapChainPresent = false;
    108  bool mWaitingCanvasRendererInitialized = false;
    109 
    110  RefPtr<WebGPUChild> mChild;
    111  RefPtr<Texture> mCurrentTexture;
    112  gfx::SurfaceFormat mGfxFormat = gfx::SurfaceFormat::R8G8B8A8;
    113 
    114  Maybe<layers::RemoteTextureId> mLastRemoteTextureId;
    115  Maybe<layers::RemoteTextureOwnerId> mRemoteTextureOwnerId;
    116  RefPtr<layers::FwdTransactionTracker> mFwdTransactionTracker;
    117  bool mUseSharedTextureInSwapChain = false;
    118  bool mNewTextureRequested = false;
    119 };
    120 
    121 typedef AutoTArray<WeakPtr<CanvasContext>, 1> CanvasContextArray;
    122 
    123 }  // namespace webgpu
    124 }  // namespace mozilla
    125 
    126 #endif  // GPU_CanvasContext_H_