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This provides the framework to allow ISurfaceProvider objects to implement WebRenderImageProvider. It is straightforward for rasterized providers (DecodedSurfaceProvider, and SimpleSurfaceProvider). Later parts in this series will provide the necessary changes for blob recordings and for animatedi images. Differential Revision: https://phabricator.services.mozilla.com/D126597
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* An ISurfaceProvider implemented for single-frame decoded surfaces.
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*/
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#ifndef mozilla_image_DecodedSurfaceProvider_h
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#define mozilla_image_DecodedSurfaceProvider_h
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#include "IDecodingTask.h"
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#include "ISurfaceProvider.h"
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#include "SurfaceCache.h"
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namespace mozilla {
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namespace image {
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/**
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* An ISurfaceProvider that manages the decoding of a single-frame image and
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* stores the resulting surface.
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*/
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class DecodedSurfaceProvider final : public ISurfaceProvider,
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public IDecodingTask {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DecodedSurfaceProvider, override)
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DecodedSurfaceProvider(NotNull<RasterImage*> aImage,
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const SurfaceKey& aSurfaceKey,
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NotNull<Decoder*> aDecoder);
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//////////////////////////////////////////////////////////////////////////////
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// ISurfaceProvider implementation.
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//////////////////////////////////////////////////////////////////////////////
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public:
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bool IsFinished() const override;
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size_t LogicalSizeInBytes() const override;
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protected:
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DrawableFrameRef DrawableRef(size_t aFrame) override;
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bool IsLocked() const override { return bool(mLockRef); }
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void SetLocked(bool aLocked) override;
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//////////////////////////////////////////////////////////////////////////////
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// IDecodingTask implementation.
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//////////////////////////////////////////////////////////////////////////////
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public:
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void Run() override;
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bool ShouldPreferSyncRun() const override;
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// Full decodes are low priority compared to metadata decodes because they
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// don't block layout or page load.
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TaskPriority Priority() const override { return TaskPriority::eLow; }
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//////////////////////////////////////////////////////////////////////////////
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// WebRenderImageProvider implementation.
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//////////////////////////////////////////////////////////////////////////////
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public:
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nsresult UpdateKey(layers::RenderRootStateManager* aManager,
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wr::IpcResourceUpdateQueue& aResources,
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wr::ImageKey& aKey) override;
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private:
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virtual ~DecodedSurfaceProvider();
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void DropImageReference();
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void CheckForNewSurface();
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void FinishDecoding();
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/// The image associated with our decoder. Dropped after decoding.
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RefPtr<RasterImage> mImage;
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/// Mutex protecting access to mDecoder.
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Mutex mMutex;
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/// The decoder that will generate our surface. Dropped after decoding.
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RefPtr<Decoder> mDecoder;
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/// Our surface. Initially null until it's generated by the decoder.
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RefPtr<imgFrame> mSurface;
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/// A drawable reference to our service; used for locking.
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DrawableFrameRef mLockRef;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_DecodedSurfaceProvider_h
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