image/DecodedSurfaceProvider.h
author Doug Thayer <dothayer@mozilla.com>
Wed, 02 May 2018 18:20:25 -0700
changeset 427223 984133e9614baa845a6dca7fc2cc6ca50cbb1687
parent 311562 8f8d3c106410aed2252be6180c542aef3b8ad738
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1265824 - Pass the texture direct mapping info to all texture creating functions r=mattwoodrow The client side can't get the GL context in CompositorOGL. So, it can't know the texture direct mapping capability directly. This patch adds the texture direct mapping info in TextureFactoryIdentifier. Then, the client side could get the info form the TextureFactoryIdentifier. MozReview-Commit-ID: KEazDVg0p9Y

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * An ISurfaceProvider implemented for single-frame decoded surfaces.
 */

#ifndef mozilla_image_DecodedSurfaceProvider_h
#define mozilla_image_DecodedSurfaceProvider_h

#include "IDecodingTask.h"
#include "ISurfaceProvider.h"
#include "SurfaceCache.h"

namespace mozilla {
namespace image {

/**
 * An ISurfaceProvider that manages the decoding of a single-frame image and
 * stores the resulting surface.
 */
class DecodedSurfaceProvider final
  : public ISurfaceProvider
  , public IDecodingTask
{
public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DecodedSurfaceProvider, override)

  DecodedSurfaceProvider(NotNull<RasterImage*> aImage,
                         const SurfaceKey& aSurfaceKey,
                         NotNull<Decoder*> aDecoder);


  //////////////////////////////////////////////////////////////////////////////
  // ISurfaceProvider implementation.
  //////////////////////////////////////////////////////////////////////////////

public:
  bool IsFinished() const override;
  size_t LogicalSizeInBytes() const override;

protected:
  DrawableFrameRef DrawableRef(size_t aFrame) override;
  bool IsLocked() const override { return bool(mLockRef); }
  void SetLocked(bool aLocked) override;


  //////////////////////////////////////////////////////////////////////////////
  // IDecodingTask implementation.
  //////////////////////////////////////////////////////////////////////////////

public:
  void Run() override;
  bool ShouldPreferSyncRun() const override;

  // Full decodes are low priority compared to metadata decodes because they
  // don't block layout or page load.
  TaskPriority Priority() const override { return TaskPriority::eLow; }


private:
  virtual ~DecodedSurfaceProvider();

  void DropImageReference();
  void CheckForNewSurface();
  void FinishDecoding();

  /// The image associated with our decoder. Dropped after decoding.
  RefPtr<RasterImage> mImage;

  /// Mutex protecting access to mDecoder.
  Mutex mMutex;

  /// The decoder that will generate our surface. Dropped after decoding.
  RefPtr<Decoder> mDecoder;

  /// Our surface. Initially null until it's generated by the decoder.
  RefPtr<imgFrame> mSurface;

  /// A drawable reference to our service; used for locking.
  DrawableFrameRef mLockRef;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_DecodedSurfaceProvider_h