1/*
2 * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
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#include "config.h"
27#include "Tile.h"
28
29#if USE(COORDINATED_GRAPHICS)
30
31#include "SurfaceUpdateInfo.h"
32#include "TiledBackingStore.h"
33#include "TiledBackingStoreClient.h"
34
35namespace WebCore {
36
37static const uint32_t InvalidTileID = 0;
38
39Tile::Tile(TiledBackingStore& tiledBackingStore, const Coordinate& tileCoordinate)
40 : m_tiledBackingStore(tiledBackingStore)
41 , m_ID(InvalidTileID)
42 , m_coordinate(tileCoordinate)
43 , m_rect(tiledBackingStore.tileRectForCoordinate(tileCoordinate))
44 , m_dirtyRect(m_rect)
45{
46}
47
48Tile::~Tile()
49{
50 if (m_ID != InvalidTileID)
51 m_tiledBackingStore.client().removeTile(m_ID);
52}
53
54void Tile::ensureTileID()
55{
56 static uint32_t id = 1;
57 if (m_ID == InvalidTileID) {
58 m_ID = id++;
59 // We may get an invalid ID due to wrap-around on overflow.
60 if (m_ID == InvalidTileID)
61 m_ID = id++;
62 m_tiledBackingStore.client().createTile(m_ID, m_tiledBackingStore.contentsScale());
63 }
64}
65
66bool Tile::isDirty() const
67{
68 return !m_dirtyRect.isEmpty();
69}
70
71bool Tile::isReadyToPaint() const
72{
73 return m_ID != InvalidTileID;
74}
75
76void Tile::invalidate(const IntRect& dirtyRect)
77{
78 IntRect tileDirtyRect = intersection(dirtyRect, m_rect);
79 if (!tileDirtyRect.isEmpty())
80 m_dirtyRect.unite(tileDirtyRect);
81}
82
83void Tile::markClean()
84{
85 m_dirtyRect = { };
86}
87
88void Tile::resize(const IntSize& newSize)
89{
90 m_rect = IntRect(m_rect.location(), newSize);
91 m_dirtyRect = m_rect;
92}
93
94} // namespace WebCore
95
96#endif // USE(COORDINATED_GRAPHICS)
97