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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 et tw=78: */
/* 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_dom_ImageData_h
#define mozilla_dom_ImageData_h
#include <cstdint>
#include <utility>
#include "js/RootingAPI.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/TypedArray.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupports.h"
#include "nsWrapperCache.h"
class JSObject;
class nsIGlobalObject;
struct JSContext;
struct JSStructuredCloneReader;
struct JSStructuredCloneWriter;
namespace mozilla {
class ErrorResult;
namespace dom {
class GlobalObject;
template <typename T>
class Optional;
// ImageData extends nsWrapperCache only to support nursery allocated wrapper.
class ImageData final : public nsISupports, public nsWrapperCache {
public:
ImageData(nsISupports* aOwner, uint32_t aWidth, uint32_t aHeight,
JS::Handle<JSObject*> aData)
: mOwner(aOwner), mWidth(aWidth), mHeight(aHeight), mData(aData) {
HoldData();
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(ImageData)
nsISupports* GetParentObject() const { return mOwner; }
static already_AddRefed<ImageData> Constructor(const GlobalObject& aGlobal,
const uint32_t aWidth,
const uint32_t aHeight,
ErrorResult& aRv);
static already_AddRefed<ImageData> Constructor(
const GlobalObject& aGlobal, const Uint8ClampedArray& aData,
const uint32_t aWidth, const Optional<uint32_t>& aHeight,
ErrorResult& aRv);
uint32_t Width() const { return mWidth; }
uint32_t Height() const { return mHeight; }
void GetData(JSContext* cx, JS::MutableHandle<JSObject*> aData) const {
aData.set(GetDataObject());
}
JSObject* GetDataObject() const { return mData; }
JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
//[Serializable] implementation
static already_AddRefed<ImageData> ReadStructuredClone(
JSContext* aCx, nsIGlobalObject* aGlobal,
JSStructuredCloneReader* aReader);
bool WriteStructuredClone(JSContext* aCx,
JSStructuredCloneWriter* aWriter) const;
private:
void HoldData();
void DropData();
ImageData() = delete;
~ImageData() { DropData(); }
nsCOMPtr<nsISupports> mOwner;
const uint32_t mWidth;
const uint32_t mHeight;
JS::Heap<JSObject*> mData;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_ImageData_h
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