1/*
2 * Copyright (C) 2017 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "GraphicsContext3DAttributes.h"
29#include <wtf/Function.h>
30#include <wtf/RefCounter.h>
31
32namespace WebCore {
33
34class WebGLStateTracker {
35 WTF_MAKE_FAST_ALLOCATED;
36public:
37 using StateChangeHandler = WTF::Function<void(bool isUsingWebGL)>;
38 WEBCORE_EXPORT explicit WebGLStateTracker(StateChangeHandler&&);
39
40 enum WebGLContextCounterType { };
41 using WebGLContextCounter = RefCounter<WebGLContextCounterType>;
42 using Token = WebGLContextCounter::Token;
43
44 Token token(GraphicsContext3DPowerPreference);
45
46private:
47 void updateWebGLState();
48
49 WebGLContextCounter m_webGLContextCounter;
50 StateChangeHandler m_stateChangeHandler;
51};
52
53} // namespace WebCore
54