зеркало из https://github.com/mozilla/spiderweb.git
102 строки
4.0 KiB
C++
102 строки
4.0 KiB
C++
/* -*- 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
|