1/*
2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
3 * Copyright (C) 2015 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#include "config.h"
28#include "BitmapTexturePool.h"
29
30#if USE(TEXTURE_MAPPER_GL)
31#include "BitmapTextureGL.h"
32#endif
33
34namespace WebCore {
35
36static const Seconds releaseUnusedSecondsTolerance { 3_s };
37static const Seconds releaseUnusedTexturesTimerInterval { 500_ms };
38
39#if USE(TEXTURE_MAPPER_GL)
40BitmapTexturePool::BitmapTexturePool(const TextureMapperContextAttributes& contextAttributes)
41 : m_contextAttributes(contextAttributes)
42 , m_releaseUnusedTexturesTimer(RunLoop::current(), this, &BitmapTexturePool::releaseUnusedTexturesTimerFired)
43{
44}
45#endif
46
47RefPtr<BitmapTexture> BitmapTexturePool::acquireTexture(const IntSize& size, const BitmapTexture::Flags flags)
48{
49 Entry* selectedEntry = std::find_if(m_textures.begin(), m_textures.end(),
50 [&size](Entry& entry) { return entry.m_texture->refCount() == 1 && entry.m_texture->size() == size; });
51
52 if (selectedEntry == m_textures.end()) {
53 m_textures.append(Entry(createTexture(flags)));
54 selectedEntry = &m_textures.last();
55 }
56
57 scheduleReleaseUnusedTextures();
58 selectedEntry->markIsInUse();
59 return selectedEntry->m_texture.copyRef();
60}
61
62void BitmapTexturePool::scheduleReleaseUnusedTextures()
63{
64 if (m_releaseUnusedTexturesTimer.isActive())
65 return;
66
67 m_releaseUnusedTexturesTimer.startOneShot(releaseUnusedTexturesTimerInterval);
68}
69
70void BitmapTexturePool::releaseUnusedTexturesTimerFired()
71{
72 if (m_textures.isEmpty())
73 return;
74
75 // Delete entries, which have been unused in releaseUnusedSecondsTolerance.
76 MonotonicTime minUsedTime = MonotonicTime::now() - releaseUnusedSecondsTolerance;
77
78 m_textures.removeAllMatching([&minUsedTime](const Entry& entry) {
79 return entry.canBeReleased(minUsedTime);
80 });
81
82 if (!m_textures.isEmpty())
83 scheduleReleaseUnusedTextures();
84}
85
86RefPtr<BitmapTexture> BitmapTexturePool::createTexture(const BitmapTexture::Flags flags)
87{
88#if USE(TEXTURE_MAPPER_GL)
89 return BitmapTextureGL::create(m_contextAttributes, flags);
90#else
91 UNUSED_PARAM(flags);
92 return nullptr;
93#endif
94}
95
96} // namespace WebCore
97