image/DynamicImage.h
author Boris Zbarsky <bzbarsky@mit.edu>
Fri, 20 Apr 2018 00:49:30 -0400
changeset 414736 d03756b18579a4bd43e4123af683d1cbfe9660d7
parent 378975 83c49f7c9c9909302af341bd5b288dc2d9f3e4d7
child 421522 7597bbcc9d66111326aa69048ad5847bdc7497f2
permissions -rw-r--r--
Bug 1429903 part 3. Remove C++ uses of nsIDOMEventTarget. r=mccr8 MozReview-Commit-ID: 4NdssvnWn0H

/* -*- 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/. */

#ifndef mozilla_image_DynamicImage_h
#define mozilla_image_DynamicImage_h

#include "mozilla/MemoryReporting.h"
#include "gfxDrawable.h"
#include "Image.h"

namespace mozilla {
namespace image {

/**
 * An Image that is dynamically created. The content of the image is provided by
 * a gfxDrawable. It's anticipated that most uses of DynamicImage will be
 * ephemeral.
 */
class DynamicImage : public Image
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_IMGICONTAINER

  explicit DynamicImage(gfxDrawable* aDrawable)
    : mDrawable(aDrawable)
  {
    MOZ_ASSERT(aDrawable, "Must have a gfxDrawable to wrap");
  }

  // Inherited methods from Image.
  nsresult GetNativeSizes(nsTArray<gfx::IntSize>& aNativeSizes) const override;
  size_t GetNativeSizesLength() const override;
  virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
  virtual size_t SizeOfSourceWithComputedFallback(
                                 SizeOfState& aState) const override;
  virtual void CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
                                     MallocSizeOf aMallocSizeOf) const override;

  virtual void IncrementAnimationConsumers() override;
  virtual void DecrementAnimationConsumers() override;
#ifdef DEBUG
  virtual uint32_t GetAnimationConsumers() override;
#endif

  virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
                                        nsISupports* aContext,
                                        nsIInputStream* aInStr,
                                        uint64_t aSourceOffset,
                                        uint32_t aCount) override;
  virtual nsresult OnImageDataComplete(nsIRequest* aRequest,
                                       nsISupports* aContext,
                                       nsresult aStatus,
                                       bool aLastPart) override;

  virtual void OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey) override;

  virtual void SetInnerWindowID(uint64_t aInnerWindowId) override;
  virtual uint64_t InnerWindowID() const override;

  virtual bool HasError() override;
  virtual void SetHasError() override;

  virtual ImageURL* GetURI() override;

private:
  virtual ~DynamicImage() { }

  RefPtr<gfxDrawable> mDrawable;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_DynamicImage_h