1/*
2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
3 * Copyright (C) 2014 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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24 * THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef BitmapTexturePool_h
28#define BitmapTexturePool_h
29
30#include "BitmapTexture.h"
31#include "TextureMapperContextAttributes.h"
32#include <wtf/RunLoop.h>
33
34namespace WebCore {
35
36class IntSize;
37
38class BitmapTexturePool {
39 WTF_MAKE_NONCOPYABLE(BitmapTexturePool);
40 WTF_MAKE_FAST_ALLOCATED;
41public:
42#if USE(TEXTURE_MAPPER_GL)
43 explicit BitmapTexturePool(const TextureMapperContextAttributes&);
44#endif
45
46 RefPtr<BitmapTexture> acquireTexture(const IntSize&, const BitmapTexture::Flags);
47
48private:
49 struct Entry {
50 explicit Entry(RefPtr<BitmapTexture>&& texture)
51 : m_texture(WTFMove(texture))
52 { }
53
54 void markIsInUse() { m_lastUsedTime = MonotonicTime::now(); }
55 bool canBeReleased (MonotonicTime minUsedTime) const { return m_lastUsedTime < minUsedTime && m_texture->refCount() == 1; }
56
57 RefPtr<BitmapTexture> m_texture;
58 MonotonicTime m_lastUsedTime;
59 };
60
61 void scheduleReleaseUnusedTextures();
62 void releaseUnusedTexturesTimerFired();
63 RefPtr<BitmapTexture> createTexture(const BitmapTexture::Flags);
64
65#if USE(TEXTURE_MAPPER_GL)
66 TextureMapperContextAttributes m_contextAttributes;
67#endif
68
69 Vector<Entry> m_textures;
70 RunLoop::Timer<BitmapTexturePool> m_releaseUnusedTexturesTimer;
71};
72
73} // namespace WebCore
74
75#endif // BitmapTexturePool_h
76