/* * Copyright (C) 2006-2017 Apple Inc. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ #include "config.h" #include "JSCanvasRenderingContext2D.h" #include "JSNodeCustom.h" namespace WebCore { bool JSCanvasRenderingContext2DOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, JSC::SlotVisitor& visitor, const char** reason) { if (UNLIKELY(reason)) *reason = "Canvas is opaque root"; JSCanvasRenderingContext2D* jsCanvasRenderingContext = JSC::jsCast<JSCanvasRenderingContext2D*>(handle.slot()->asCell()); void* root = WebCore::root(jsCanvasRenderingContext->wrapped().canvas()); return visitor.containsOpaqueRoot(root); } void JSCanvasRenderingContext2D::visitAdditionalChildren(JSC::SlotVisitor& visitor) { visitor.addOpaqueRoot(root(wrapped().canvas())); } } // namespace WebCore