/* 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 "js/RootingAPI.h"
#include "mozilla/AlreadyAddRefed.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_FINAL
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
