1/*
2 * Copyright (C) 2016 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "DisplayListReplayer.h"
28
29#include "DisplayListItems.h"
30#include "GraphicsContext.h"
31#include "Logging.h"
32#include <wtf/text/TextStream.h>
33
34namespace WebCore {
35namespace DisplayList {
36
37Replayer::Replayer(GraphicsContext& context, const DisplayList& displayList)
38 : m_displayList(displayList)
39 , m_context(context)
40{
41}
42
43Replayer::~Replayer() = default;
44
45std::unique_ptr<DisplayList> Replayer::replay(const FloatRect& initialClip, bool trackReplayList)
46{
47 LOG_WITH_STREAM(DisplayLists, stream << "\nReplaying with clip " << initialClip);
48 UNUSED_PARAM(initialClip);
49
50 std::unique_ptr<DisplayList> replayList;
51 if (UNLIKELY(trackReplayList))
52 replayList = std::make_unique<DisplayList>();
53
54 size_t numItems = m_displayList.itemCount();
55 for (size_t i = 0; i < numItems; ++i) {
56 auto& item = m_displayList.list()[i].get();
57
58 if (!initialClip.isZero() && is<DrawingItem>(item)) {
59 const DrawingItem& drawingItem = downcast<DrawingItem>(item);
60 if (drawingItem.extentKnown() && !drawingItem.extent().intersects(initialClip)) {
61 LOG_WITH_STREAM(DisplayLists, stream << "skipping " << i << " " << item);
62 continue;
63 }
64 }
65
66 LOG_WITH_STREAM(DisplayLists, stream << "applying " << i << " " << item);
67 item.apply(m_context);
68
69 if (UNLIKELY(trackReplayList))
70 replayList->appendItem(const_cast<Item&>(item));
71 }
72
73 return replayList;
74}
75
76} // namespace DisplayList
77} // namespace WebCore
78