/* -*- 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/. */ #include "mozilla/dom/ImageData.h" #include "mozilla/CheckedInt.h" #include "mozilla/HoldDropJSObjects.h" #include "mozilla/dom/ImageDataBinding.h" #include "jsapi.h" namespace mozilla { namespace dom { NS_IMPL_CYCLE_COLLECTING_ADDREF(ImageData) NS_IMPL_CYCLE_COLLECTING_RELEASE(ImageData) NS_IMPL_CYCLE_COLLECTION_CLASS(ImageData) NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ImageData) NS_INTERFACE_MAP_ENTRY(nsISupports) NS_INTERFACE_MAP_END NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ImageData) NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData) NS_IMPL_CYCLE_COLLECTION_TRACE_END NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ImageData) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ImageData) tmp->DropData(); NS_IMPL_CYCLE_COLLECTION_UNLINK_END //static already_AddRefed<ImageData> ImageData::Constructor(const GlobalObject& aGlobal, const uint32_t aWidth, const uint32_t aHeight, ErrorResult& aRv) { if (aWidth == 0 || aHeight == 0) { aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); return nullptr; } CheckedInt<uint32_t> length = CheckedInt<uint32_t>(aWidth) * aHeight * 4; if (!length.isValid()) { aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); return nullptr; } js::AssertSameCompartment(aGlobal.Context(), aGlobal.Get()); JSObject* data = Uint8ClampedArray::Create(aGlobal.Context(), length.value()); if (!data) { aRv.Throw(NS_ERROR_OUT_OF_MEMORY); return nullptr; } RefPtr<ImageData> imageData = new ImageData(aWidth, aHeight, *data); return imageData.forget(); } //static already_AddRefed<ImageData> ImageData::Constructor(const GlobalObject& aGlobal, const Uint8ClampedArray& aData, const uint32_t aWidth, const Optional<uint32_t>& aHeight, ErrorResult& aRv) { aData.ComputeLengthAndData(); uint32_t length = aData.Length(); if (length == 0 || length % 4) { aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); return nullptr; } length /= 4; if (aWidth == 0) { aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); return nullptr; } uint32_t height = length / aWidth; if (length != aWidth * height || (aHeight.WasPassed() && aHeight.Value() != height)) { aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); return nullptr; } if (JS_GetTypedArraySharedness(aData.Obj())) { // Throw if the object is mapping shared memory (must opt in). aRv.ThrowTypeError<MSG_TYPEDARRAY_IS_SHARED>(NS_LITERAL_STRING("Argument of ImageData constructor")); return nullptr; } RefPtr<ImageData> imageData = new ImageData(aWidth, height, *aData.Obj()); return imageData.forget(); } void ImageData::HoldData() { mozilla::HoldJSObjects(this); } void ImageData::DropData() { if (mData) { mData = nullptr; mozilla::DropJSObjects(this); } } bool ImageData::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto, JS::MutableHandle<JSObject*> aReflector) { return ImageDataBinding::Wrap(aCx, this, aGivenProto, aReflector); } } // namespace dom } // namespace mozilla