image/DynamicImage.h

   1 /* -*- Mode: C++; tab-width: 2; 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 mozilla_image_DynamicImage_h
   7 #define mozilla_image_DynamicImage_h
   8
   9 #include "mozilla/MemoryReporting.h"
  10 #include "gfxDrawable.h"
  11 #include "Image.h"
  12
  13 namespace mozilla {
  14 namespace image {
  15
  16 /**
  17  * An Image that is dynamically created. The content of the image is provided by
  18  * a gfxDrawable. It's anticipated that most uses of DynamicImage will be
  19  * ephemeral.
  20  */
  21 class DynamicImage : public Image {
  22  public:
  23   NS_DECL_ISUPPORTS
  24   NS_DECL_IMGICONTAINER
  25
  26   explicit DynamicImage(gfxDrawable* aDrawable) : mDrawable(aDrawable) {
  27     MOZ_ASSERT(aDrawable, "Must have a gfxDrawable to wrap");
  28   }
  29
  30   // Inherited methods from Image.
  31   virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
  32   virtual size_t SizeOfSourceWithComputedFallback(
  33       SizeOfState& aState) const override;
  34   virtual void CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
  35                                      MallocSizeOf aMallocSizeOf) const override;
  36
  37   virtual void IncrementAnimationConsumers() override;
  38   virtual void DecrementAnimationConsumers() override;
  39 #ifdef DEBUG
  40   virtual uint32_t GetAnimationConsumers() override;
  41 #endif
  42
  43   virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
  44                                         nsIInputStream* aInStr,
  45                                         uint64_t aSourceOffset,
  46                                         uint32_t aCount) override;
  47   virtual nsresult OnImageDataComplete(nsIRequest* aRequest, nsresult aStatus,
  48                                        bool aLastPart) override;
  49
  50   virtual void OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey) override;
  51
  52   virtual void SetInnerWindowID(uint64_t aInnerWindowId) override;
  53   virtual uint64_t InnerWindowID() const override;
  54
  55   virtual bool HasError() override;
  56   virtual void SetHasError() override;
  57
  58   nsIURI* GetURI() const override;
  59
  60  private:
  61   virtual ~DynamicImage() {}
  62
  63   RefPtr<gfxDrawable> mDrawable;
  64 };
  65
  66 }  // namespace image
  67 }  // namespace mozilla
  68
  69 #endif  // mozilla_image_DynamicImage_h