gecko-dev/dom/canvas/ImageData.h

68 строки
2.0 KiB
C++

/* -*- 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 "mozilla/Attributes.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/TypedArray.h"
#include <stdint.h>
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsImpl.h"
#include "js/RootingAPI.h"
namespace mozilla {
namespace dom {
class ImageData final : public nsISupports {
~ImageData() { DropData(); }
public:
ImageData(uint32_t aWidth, uint32_t aHeight, JSObject& aData)
: mWidth(aWidth), mHeight(aHeight), mData(&aData) {
HoldData();
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(ImageData)
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; }
bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
JS::MutableHandle<JSObject*> aReflector);
private:
void HoldData();
void DropData();
ImageData() = delete;
uint32_t mWidth, mHeight;
JS::Heap<JSObject*> mData;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_ImageData_h