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 "DisplayList.h"
28
29#include "DisplayListItems.h"
30#include "Logging.h"
31#include <wtf/StdLibExtras.h>
32#include <wtf/text/TextStream.h>
33
34namespace WebCore {
35namespace DisplayList {
36
37#if !defined(NDEBUG) || !LOG_DISABLED
38WTF::CString DisplayList::description() const
39{
40 TextStream ts;
41 ts << this;
42 return ts.release().utf8();
43}
44
45void DisplayList::dump() const
46{
47 fprintf(stderr, "%s", description().data());
48}
49#endif
50
51void DisplayList::clear()
52{
53 m_list.clear();
54}
55
56void DisplayList::removeItemsFromIndex(size_t index)
57{
58 m_list.resize(index);
59}
60
61bool DisplayList::shouldDumpForFlags(AsTextFlags flags, const Item& item)
62{
63 switch (item.type()) {
64 case ItemType::SetState:
65 if (!(flags & AsTextFlag::IncludesPlatformOperations)) {
66 const auto& stateItem = downcast<SetState>(item);
67 // FIXME: for now, only drop the item if the only state-change flags are platform-specific.
68 if (stateItem.state().m_changeFlags == GraphicsContextState::ShouldSubpixelQuantizeFontsChange)
69 return false;
70
71 if (stateItem.state().m_changeFlags == GraphicsContextState::ShouldSubpixelQuantizeFontsChange)
72 return false;
73 }
74 break;
75#if USE(CG)
76 case ItemType::ApplyFillPattern:
77 case ItemType::ApplyStrokePattern:
78 if (!(flags & AsTextFlag::IncludesPlatformOperations))
79 return false;
80 break;
81#endif
82 default:
83 break;
84 }
85 return true;
86}
87
88String DisplayList::asText(AsTextFlags flags) const
89{
90 TextStream stream(TextStream::LineMode::MultipleLine, TextStream::Formatting::SVGStyleRect);
91 for (auto& item : m_list) {
92 if (!shouldDumpForFlags(flags, item))
93 continue;
94 stream << item;
95 }
96 return stream.release();
97}
98
99void DisplayList::dump(TextStream& ts) const
100{
101 TextStream::GroupScope group(ts);
102 ts << "display list";
103
104 size_t numItems = m_list.size();
105 for (size_t i = 0; i < numItems; ++i) {
106 TextStream::GroupScope scope(ts);
107 ts << i << " " << m_list[i].get();
108 }
109 ts.startGroup();
110 ts << "size in bytes: " << sizeInBytes();
111 ts.endGroup();
112}
113
114size_t DisplayList::sizeInBytes() const
115{
116 size_t result = 0;
117 for (auto& ref : m_list)
118 result += Item::sizeInBytes(ref);
119
120 return result;
121}
122
123} // namespace DisplayList
124
125TextStream& operator<<(TextStream& ts, const DisplayList::DisplayList& displayList)
126{
127 displayList.dump(ts);
128 return ts;
129}
130
131} // namespace WebCore
132