1/*
2 * Copyright (C) 2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSPaintRenderingContext2D.h"
28
29#if ENABLE(CSS_PAINTING_API)
30
31namespace WebCore {
32using namespace JSC;
33
34inline void* root(CustomPaintCanvas* canvas)
35{
36 return canvas;
37}
38
39bool JSPaintRenderingContext2DOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor, const char** reason)
40{
41 if (UNLIKELY(reason))
42 *reason = "Canvas is opaque root";
43
44 JSPaintRenderingContext2D* jsPaintRenderingContext = jsCast<JSPaintRenderingContext2D*>(handle.slot()->asCell());
45 void* root = WebCore::root(&jsPaintRenderingContext->wrapped().canvas());
46 return visitor.containsOpaqueRoot(root);
47}
48
49void JSPaintRenderingContext2D::visitAdditionalChildren(SlotVisitor& visitor)
50{
51 visitor.addOpaqueRoot(root(&wrapped().canvas()));
52}
53
54} // namespace WebCore
55#endif
56
57