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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"
#include <utility>
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_INLINE_DECL_REFCOUNTING_INHERITED(ClippedImage, ImageWrapper)
NS_IMETHOD GetWidth(int32_t* aWidth) override;
NS_IMETHOD GetHeight(int32_t* aHeight) override;
NS_IMETHOD GetIntrinsicSize(nsSize* aSize) override;
Maybe<AspectRatio> GetIntrinsicRatio() 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_(bool)
IsImageContainerAvailableAtSize(layers::LayerManager* aManager,
const gfx::IntSize& aSize,
uint32_t aFlags) override;
NS_IMETHOD_(ImgDrawResult)
GetImageContainerAtSize(layers::LayerManager* aManager,
const gfx::IntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags,
layers::ImageContainer** aOutContainer) override;
NS_IMETHOD_(ImgDrawResult)
Draw(gfxContext* aContext, const nsIntSize& aSize, const ImageRegion& aRegion,
uint32_t aWhichFrame, gfx::SamplingFilter aSamplingFilter,
const Maybe<SVGImageContext>& aSVGContext, uint32_t aFlags,
float aOpacity) 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:
std::pair<ImgDrawResult, RefPtr<SourceSurface>> GetFrameInternal(
const nsIntSize& aSize, const Maybe<SVGImageContext>& aSVGContext,
uint32_t aWhichFrame, uint32_t aFlags, float aOpacity);
bool ShouldClip();
ImgDrawResult DrawSingleTile(gfxContext* aContext, const nsIntSize& aSize,
const ImageRegion& aRegion, uint32_t aWhichFrame,
gfx::SamplingFilter aSamplingFilter,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags, float aOpacity);
// 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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