1/*
2 * Copyright (C) 2017 Metrological Group B.V.
3 * Copyright (C) 2017 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following
13 * disclaimer in the documentation and/or other materials provided
14 * with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#pragma once
30
31#include "IntSize.h"
32#include <wtf/Condition.h>
33#include <wtf/Lock.h>
34#include <wtf/MallocPtr.h>
35#include <wtf/Ref.h>
36#include <wtf/ThreadSafeRefCounted.h>
37
38namespace Nicosia {
39
40class Buffer : public ThreadSafeRefCounted<Buffer> {
41public:
42 enum Flag {
43 NoFlags = 0,
44 SupportsAlpha = 1 << 0,
45 };
46 using Flags = unsigned;
47
48 WEBCORE_EXPORT static Ref<Buffer> create(const WebCore::IntSize&, Flags);
49 WEBCORE_EXPORT ~Buffer();
50
51 bool supportsAlpha() const { return m_flags & SupportsAlpha; }
52 const WebCore::IntSize& size() const { return m_size; }
53 int stride() const { return m_size.width() * 4; }
54 unsigned char* data() const { return m_data.get(); }
55
56 void beginPainting();
57 void completePainting();
58 void waitUntilPaintingComplete();
59
60private:
61 Buffer(const WebCore::IntSize&, Flags);
62
63 MallocPtr<unsigned char> m_data;
64 WebCore::IntSize m_size;
65 Flags m_flags;
66
67 enum class PaintingState {
68 InProgress,
69 Complete
70 };
71
72 struct {
73 Lock lock;
74 Condition condition;
75 PaintingState state { PaintingState::Complete };
76 } m_painting;
77};
78
79} // namespace Nicosia
80