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In addition to the image container, the draw result can also be useful for callers to know whether or not the surface(s) in the container are fully decoded or not. This is used in subsequent parts to avoid flickering in some cases.
115 lines
4.7 KiB
C++
115 lines
4.7 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_ClippedImage_h
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#define mozilla_image_ClippedImage_h
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#include "ImageWrapper.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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namespace image {
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class ClippedImageCachedSurface;
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class DrawSingleTileCallback;
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/**
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* An Image wrapper that clips an image against a rectangle. Right now only
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* absolute coordinates in pixels are supported.
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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 ClippedImage : public ImageWrapper
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{
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typedef gfx::SourceSurface SourceSurface;
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public:
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NS_INLINE_DECL_REFCOUNTING_INHERITED(ClippedImage, ImageWrapper)
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NS_IMETHOD GetWidth(int32_t* aWidth) override;
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NS_IMETHOD GetHeight(int32_t* aHeight) override;
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NS_IMETHOD GetIntrinsicSize(nsSize* aSize) override;
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NS_IMETHOD GetIntrinsicRatio(nsSize* aRatio) 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_(bool)
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IsImageContainerAvailableAtSize(layers::LayerManager* aManager,
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const gfx::IntSize& aSize,
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uint32_t aFlags) override;
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NS_IMETHOD_(ImgDrawResult)
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GetImageContainerAtSize(layers::LayerManager* aManager,
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const gfx::IntSize& aSize,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aFlags,
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layers::ImageContainer** aOutContainer) override;
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NS_IMETHOD_(ImgDrawResult) 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,
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float aOpacity) override;
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NS_IMETHOD RequestDiscard() override;
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NS_IMETHOD_(Orientation) GetOrientation() override;
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NS_IMETHOD_(nsIntRect) GetImageSpaceInvalidationRect(const nsIntRect& aRect)
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override;
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nsIntSize OptimalImageSizeForDest(const gfxSize& aDest,
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uint32_t aWhichFrame,
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gfx::SamplingFilter aSamplingFilter,
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uint32_t aFlags) override;
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protected:
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ClippedImage(Image* aImage, nsIntRect aClip,
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const Maybe<nsSize>& aSVGViewportSize);
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virtual ~ClippedImage();
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private:
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Pair<ImgDrawResult, RefPtr<SourceSurface>>
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GetFrameInternal(const nsIntSize& aSize,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aWhichFrame,
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uint32_t aFlags,
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float aOpacity);
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bool ShouldClip();
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ImgDrawResult DrawSingleTile(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,
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float aOpacity);
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// If we are forced to draw a temporary surface, we cache it here.
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UniquePtr<ClippedImageCachedSurface> mCachedSurface;
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nsIntRect mClip; // The region to clip to.
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Maybe<bool> mShouldClip; // Memoized ShouldClip() if present.
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Maybe<nsIntSize> mSVGViewportSize; // If we're clipping a VectorImage, this
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// is the size of viewport of that image.
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friend class DrawSingleTileCallback;
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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_ClippedImage_h
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