image/DecodedSurfaceProvider.h
author L10n Bumper Bot <release+l10nbumper@mozilla.com>
Thu, 08 Nov 2018 04:00:19 -0800
changeset 501103 7bb875130d4e5c249d11c9c0cfab169071d63159
parent 355065 8f8d3c106410aed2252be6180c542aef3b8ad738
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
no bug - Bumping Firefox l10n changesets r=release a=l10n-bump DONTBUILD fy-NL -> 0bb7dbc40693 ga-IE -> f3908a1bdbe1 gd -> fb2f90fb6c55 gl -> d1f341097504 gn -> 1b34bd85e970 gu-IN -> b9e436701735 he -> 2089fb701e11 hi-IN -> e3c5a66c3a31 hr -> 70f7cc013b43 hsb -> 779bf1ff93be hu -> a7696eac59a0 hy-AM -> 39402ec448d5 ia -> a014929c8b9f id -> 64354ab44f7d is -> 58a1e1824c2b ja -> 992f87605e0b ja-JP-mac -> 7d0f88bb10a8 ka -> 178d06697a7e kab -> ab445bdeb0ab kk -> d651702a031d kn -> 02226c531652

/* -*- 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