зеркало из https://github.com/mozilla/gecko-dev.git
103 строки
4.2 KiB
C++
103 строки
4.2 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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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, uint32_t aWhichFrame,
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uint32_t aFlags) override;
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NS_IMETHOD_(bool)
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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, 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)
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Draw(gfxContext* aContext, const nsIntSize& aSize, const ImageRegion& aRegion,
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uint32_t aWhichFrame, gfx::SamplingFilter aSamplingFilter,
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const Maybe<SVGImageContext>& aSVGContext, 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)
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GetImageSpaceInvalidationRect(const nsIntRect& aRect) override;
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nsIntSize OptimalImageSizeForDest(const gfxSize& aDest, 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>> GetFrameInternal(
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const nsIntSize& aSize, const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aWhichFrame, uint32_t aFlags, float aOpacity);
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bool ShouldClip();
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ImgDrawResult DrawSingleTile(gfxContext* aContext, const nsIntSize& aSize,
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const ImageRegion& aRegion, 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, 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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