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+/* -*- 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_ImageWrapper_h
+#define mozilla_image_ImageWrapper_h
+
+#include "mozilla/MemoryReporting.h"
+#include "Image.h"
+
+namespace mozilla {
+namespace image {
+
+/**
+ * Abstract superclass for Images that wrap other Images.
+ */
+class ImageWrapper : public Image
+{
+public:
+ NS_DECL_ISUPPORTS
+ NS_DECL_IMGICONTAINER
+
+ // Inherited methods from Image.
+ virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
+
+ virtual size_t
+ SizeOfSourceWithComputedFallback(MallocSizeOf aMallocSizeOf) 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() 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;
+
+protected:
+ explicit ImageWrapper(Image* aInnerImage)
+ : mInnerImage(aInnerImage)
+ {
+ MOZ_ASSERT(aInnerImage, "Need an image to wrap");
+ }
+
+ virtual ~ImageWrapper() { }
+
+ /**
+ * Returns a weak reference to the inner image wrapped by this ImageWrapper.
+ */
+ Image* InnerImage() const { return mInnerImage.get(); }
+
+ void SetInnerImage(Image* aInnerImage)
+ {
+ MOZ_ASSERT(aInnerImage, "Need an image to wrap");
+ mInnerImage = aInnerImage;
+ }
+
+private:
+ RefPtr<Image> mInnerImage;
+};
+
+} // namespace image
+} // namespace mozilla
+
+#endif // mozilla_image_ImageWrapper_h