зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
3.7 KiB
C++
99 строки
3.7 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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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_DECL_ISUPPORTS_INHERITED
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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_(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::Filter aFilter,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aFlags) 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::Filter aFilter,
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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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virtual ~ClippedImage();
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private:
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Pair<DrawResult, 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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bool ShouldClip();
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DrawResult 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::Filter aFilter,
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const Maybe<SVGImageContext>& aSVGContext,
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uint32_t aFlags);
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// If we are forced to draw a temporary surface, we cache it here.
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nsAutoPtr<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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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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