image/src/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_IMAGELIB_DYNAMICIMAGE_H_
   7 #define MOZILLA_IMAGELIB_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 {
  23 public:
  24   NS_DECL_ISUPPORTS
  25   NS_DECL_IMGICONTAINER
  26
  27   explicit DynamicImage(gfxDrawable* aDrawable)
  28     : mDrawable(aDrawable)
  29   {
  30     MOZ_ASSERT(aDrawable, "Must have a gfxDrawable to wrap");
  31   }
  32
  33   // Inherited methods from Image.
  34   virtual nsresult Init(const char* aMimeType, uint32_t aFlags) override;
  35
  36   virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
  37   virtual size_t SizeOfSourceWithComputedFallback(
  38                                  MallocSizeOf aMallocSizeOf) const override;
  39   virtual size_t SizeOfDecoded(gfxMemoryLocation aLocation,
  40                                MallocSizeOf aMallocSizeOf) const override;
  41
  42   virtual void IncrementAnimationConsumers() override;
  43   virtual void DecrementAnimationConsumers() override;
  44 #ifdef DEBUG
  45   virtual uint32_t GetAnimationConsumers() override;
  46 #endif
  47
  48   virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
  49                                         nsISupports* aContext,
  50                                         nsIInputStream* aInStr,
  51                                         uint64_t aSourceOffset,
  52                                         uint32_t aCount) override;
  53   virtual nsresult OnImageDataComplete(nsIRequest* aRequest,
  54                                        nsISupports* aContext,
  55                                        nsresult aStatus,
  56                                        bool aLastPart) override;
  57
  58   virtual void OnSurfaceDiscarded() override;
  59
  60   virtual void SetInnerWindowID(uint64_t aInnerWindowId) override;
  61   virtual uint64_t InnerWindowID() const override;
  62
  63   virtual bool HasError() override;
  64   virtual void SetHasError() override;
  65
  66   virtual ImageURL* GetURI() override;
  67
  68 private:
  69   virtual ~DynamicImage() { }
  70
  71   nsRefPtr<gfxDrawable> mDrawable;
  72 };
  73
  74 } // namespace image
  75 } // namespace mozilla
  76
  77 #endif // MOZILLA_IMAGELIB_DYNAMICIMAGE_H_