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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_ClippedImage_h
#define mozilla_image_ClippedImage_h
#include "ImageWrapper.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
namespace mozilla {
namespace image {
class ClippedImageCachedSurface;
class DrawSingleTileCallback;
/**
* An Image wrapper that clips an image against a rectangle. Right now only
* absolute coordinates in pixels are supported.
*
* XXX(seth): There a known (performance, not correctness) issue with
* GetImageContainer. See the comments for that method for more information.
*/
class ClippedImage : public ImageWrapper
{
typedef gfx::SourceSurface SourceSurface;
public:
NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD GetWidth(int32_t* aWidth) override;
NS_IMETHOD GetHeight(int32_t* aHeight) override;
NS_IMETHOD GetIntrinsicSize(nsSize* aSize) override;
NS_IMETHOD GetIntrinsicRatio(nsSize* aRatio) override;
NS_IMETHOD_(already_AddRefed<SourceSurface>)
GetFrame(uint32_t aWhichFrame, uint32_t aFlags) override;
NS_IMETHOD_(already_AddRefed<SourceSurface>)
GetFrameAtSize(const gfx::IntSize& aSize,
uint32_t aWhichFrame,
uint32_t aFlags) override;
NS_IMETHOD_(bool) IsImageContainerAvailable(layers::LayerManager* aManager,
uint32_t aFlags) override;
NS_IMETHOD_(already_AddRefed<layers::ImageContainer>)
GetImageContainer(layers::LayerManager* aManager,
uint32_t aFlags) override;
NS_IMETHOD_(DrawResult) Draw(gfxContext* aContext,
const nsIntSize& aSize,
const ImageRegion& aRegion,
uint32_t aWhichFrame,
gfx::SamplingFilter aSamplingFilter,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags) override;
NS_IMETHOD RequestDiscard() override;
NS_IMETHOD_(Orientation) GetOrientation() override;
NS_IMETHOD_(nsIntRect) GetImageSpaceInvalidationRect(const nsIntRect& aRect)
override;
nsIntSize OptimalImageSizeForDest(const gfxSize& aDest,
uint32_t aWhichFrame,
gfx::SamplingFilter aSamplingFilter,
uint32_t aFlags) override;
protected:
ClippedImage(Image* aImage, nsIntRect aClip,
const Maybe<nsSize>& aSVGViewportSize);
virtual ~ClippedImage();
private:
Pair<DrawResult, RefPtr<SourceSurface>>
GetFrameInternal(const nsIntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aWhichFrame,
uint32_t aFlags);
bool ShouldClip();
DrawResult DrawSingleTile(gfxContext* aContext,
const nsIntSize& aSize,
const ImageRegion& aRegion,
uint32_t aWhichFrame,
gfx::SamplingFilter aSamplingFilter,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags);
// If we are forced to draw a temporary surface, we cache it here.
UniquePtr<ClippedImageCachedSurface> mCachedSurface;
nsIntRect mClip; // The region to clip to.
Maybe<bool> mShouldClip; // Memoized ShouldClip() if present.
Maybe<nsIntSize> mSVGViewportSize; // If we're clipping a VectorImage, this
// is the size of viewport of that image.
friend class DrawSingleTileCallback;
friend class ImageOps;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_ClippedImage_h
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