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/* 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 ImageBitmapRenderingContext_h
#define ImageBitmapRenderingContext_h
#include "nsICanvasRenderingContextInternal.h"
#include "nsWrapperCache.h"
namespace mozilla {
namespace gfx {
class DataSourceSurface;
class DrawTarget;
class SourceSurface;
}
namespace layers {
class Image;
class ImageContainer;
}
namespace dom {
/**
* The purpose of ImageBitmapRenderingContext is to provide a faster and efficient
* way to display ImageBitmap. Simply call TransferFromImageBitmap() then we'll transfer
* the surface of ImageBitmap to this context and then to use it to display.
*
* See more details in spec: https://wiki.whatwg.org/wiki/OffscreenCanvas
*/
class ImageBitmapRenderingContext final :
public nsICanvasRenderingContextInternal,
public nsWrapperCache
{
virtual ~ImageBitmapRenderingContext();
public:
ImageBitmapRenderingContext();
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
// nsISupports interface + CC
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(ImageBitmapRenderingContext)
void TransferImageBitmap(ImageBitmap& aImageBitmap);
void TransferFromImageBitmap(ImageBitmap& aImageBitmap);
// nsICanvasRenderingContextInternal
virtual int32_t GetWidth() const override;
virtual int32_t GetHeight() const override;
NS_IMETHOD SetDimensions(int32_t aWidth, int32_t aHeight) override;
NS_IMETHOD InitializeWithDrawTarget(nsIDocShell* aDocShell,
NotNull<gfx::DrawTarget*> aTarget) override;
virtual mozilla::UniquePtr<uint8_t[]> GetImageBuffer(int32_t* aFormat) override;
NS_IMETHOD GetInputStream(const char* aMimeType,
const char16_t* aEncoderOptions,
nsIInputStream** aStream) override;
virtual already_AddRefed<mozilla::gfx::SourceSurface>
GetSurfaceSnapshot(bool* aPremultAlpha = nullptr) override;
NS_IMETHOD SetIsOpaque(bool aIsOpaque) override;
virtual bool GetIsOpaque() override;
NS_IMETHOD Reset() override;
virtual already_AddRefed<Layer> GetCanvasLayer(nsDisplayListBuilder* aBuilder,
Layer* aOldLayer,
LayerManager* aManager,
bool aMirror = false) override;
virtual void MarkContextClean() override;
NS_IMETHOD Redraw(const gfxRect& aDirty) override;
NS_IMETHOD SetIsIPC(bool aIsIPC) override;
virtual void DidRefresh() override;
virtual void MarkContextCleanForFrameCapture() override;
virtual bool IsContextCleanForFrameCapture() override;
protected:
already_AddRefed<gfx::DataSourceSurface> MatchWithIntrinsicSize();
already_AddRefed<layers::Image> ClipToIntrinsicSize();
int32_t mWidth;
int32_t mHeight;
RefPtr<layers::Image> mImage;
};
}
}
#endif /* ImageBitmapRenderingContext_h */
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