74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_FrozenImage_h
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#define mozilla_image_FrozenImage_h
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#include "ImageWrapper.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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namespace mozilla {
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namespace image {
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/**
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* An Image wrapper that disables animation, freezing the image at its first
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* frame. It does this using two strategies. If this is the only instance of the
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* image, animation will never start, because IncrementAnimationConsumers is
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* ignored. If there is another instance that is animated, that's still OK,
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* because any imgIContainer method that is affected by animation gets its
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* aWhichFrame argument set to FRAME_FIRST when it passes through FrozenImage.
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*
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* XXX(seth): There a known (performance, not correctness) issue with
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* GetImageContainer. See the comments for that method for more information.
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*/
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class FrozenImage : public ImageWrapper
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{
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typedef gfx::SourceSurface SourceSurface;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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virtual void IncrementAnimationConsumers() override;
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virtual void DecrementAnimationConsumers() override;
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NS_IMETHOD GetAnimated(bool* aAnimated) override;
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NS_IMETHOD_(already_AddRefed<SourceSurface>)
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GetFrame(uint32_t aWhichFrame, uint32_t aFlags) override;
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NS_IMETHOD_(already_AddRefed<SourceSurface>)
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GetFrameAtSize(const gfx::IntSize& aSize,
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uint32_t aWhichFrame,
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uint32_t aFlags) override;
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NS_IMETHOD_(bool) IsImageContainerAvailable(layers::LayerManager* aManager,
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uint32_t aFlags) override;
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NS_IMETHOD_(already_AddRefed<layers::ImageContainer>)
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GetImageContainer(layers::LayerManager* aManager,
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uint32_t aFlags) override;
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NS_IMETHOD_(DrawResult) Draw(gfxContext* aContext,
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const nsIntSize& aSize,
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const ImageRegion& aRegion,
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uint32_t aWhichFrame,
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gfx::SamplingFilter aSamplingFilter,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aFlags) override;
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NS_IMETHOD_(void) RequestRefresh(const TimeStamp& aTime) override;
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NS_IMETHOD GetAnimationMode(uint16_t* aAnimationMode) override;
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NS_IMETHOD SetAnimationMode(uint16_t aAnimationMode) override;
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NS_IMETHOD ResetAnimation() override;
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NS_IMETHOD_(float) GetFrameIndex(uint32_t aWhichFrame) override;
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protected:
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explicit FrozenImage(Image* aImage) : ImageWrapper(aImage) { }
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virtual ~FrozenImage() { }
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private:
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friend class ImageOps;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_FrozenImage_h
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