1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21#include "JSOffscreenCanvasRenderingContext2D.h"
22
23namespace WebCore {
24using namespace JSC;
25
26inline void* root(OffscreenCanvas* canvas)
27{
28 return canvas;
29}
30
31bool JSOffscreenCanvasRenderingContext2DOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor, const char** reason)
32{
33 if (UNLIKELY(reason))
34 *reason = "Canvas is opaque root";
35
36 JSOffscreenCanvasRenderingContext2D* jsOffscreenCanvasRenderingContext = jsCast<JSOffscreenCanvasRenderingContext2D*>(handle.slot()->asCell());
37 void* root = WebCore::root(&jsOffscreenCanvasRenderingContext->wrapped().canvas());
38 return visitor.containsOpaqueRoot(root);
39}
40
41void JSOffscreenCanvasRenderingContext2D::visitAdditionalChildren(SlotVisitor& visitor)
42{
43 visitor.addOpaqueRoot(root(&wrapped().canvas()));
44}
45
46} // namespace WebCore
47
48