1/*
2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2009 Torch Mobile, Inc.
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. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "CachedFont.h"
29
30#include "CachedFontClient.h"
31#include "CachedResourceClientWalker.h"
32#include "CachedResourceLoader.h"
33#include "FontCustomPlatformData.h"
34#include "FontDescription.h"
35#include "FontPlatformData.h"
36#include "SharedBuffer.h"
37#include "TextResourceDecoder.h"
38#include "TypedElementDescendantIterator.h"
39#include "WOFFFileFormat.h"
40#include <wtf/Vector.h>
41
42#if USE(DIRECT2D)
43#include <dwrite.h>
44#endif
45
46namespace WebCore {
47
48CachedFont::CachedFont(CachedResourceRequest&& request, const PAL::SessionID& sessionID, const CookieJar* cookieJar, Type type)
49 : CachedResource(WTFMove(request), type, sessionID, cookieJar)
50 , m_loadInitiated(false)
51 , m_hasCreatedFontDataWrappingResource(false)
52{
53}
54
55CachedFont::~CachedFont() = default;
56
57void CachedFont::load(CachedResourceLoader&)
58{
59 // Don't load the file yet. Wait for an access before triggering the load.
60 setLoading(true);
61}
62
63void CachedFont::didAddClient(CachedResourceClient& client)
64{
65 ASSERT(client.resourceClientType() == CachedFontClient::expectedType());
66 if (!isLoading())
67 static_cast<CachedFontClient&>(client).fontLoaded(*this);
68}
69
70void CachedFont::finishLoading(SharedBuffer* data)
71{
72 m_data = data;
73 setEncodedSize(m_data.get() ? m_data->size() : 0);
74 setLoading(false);
75 checkNotify();
76}
77
78void CachedFont::beginLoadIfNeeded(CachedResourceLoader& loader)
79{
80 if (!m_loadInitiated) {
81 m_loadInitiated = true;
82 CachedResource::load(loader);
83 }
84}
85
86bool CachedFont::ensureCustomFontData(const AtomicString&)
87{
88 return ensureCustomFontData(m_data.get());
89}
90
91String CachedFont::calculateItemInCollection() const
92{
93 auto& url = this->url();
94 if (!url.hasFragmentIdentifier())
95 return String();
96 return url.fragmentIdentifier();
97}
98
99bool CachedFont::ensureCustomFontData(SharedBuffer* data)
100{
101 if (!m_fontCustomPlatformData && !errorOccurred() && !isLoading() && data) {
102 bool wrapping;
103 m_fontCustomPlatformData = createCustomFontData(*data, calculateItemInCollection(), wrapping);
104 m_hasCreatedFontDataWrappingResource = m_fontCustomPlatformData && wrapping;
105 if (!m_fontCustomPlatformData)
106 setStatus(DecodeError);
107 }
108
109 return m_fontCustomPlatformData.get();
110}
111
112std::unique_ptr<FontCustomPlatformData> CachedFont::createCustomFontData(SharedBuffer& bytes, const String& itemInCollection, bool& wrapping)
113{
114 wrapping = true;
115
116#if !PLATFORM(COCOA)
117 if (isWOFF(bytes)) {
118 wrapping = false;
119 Vector<char> convertedFont;
120 if (!convertWOFFToSfnt(bytes, convertedFont))
121 return nullptr;
122
123 auto buffer = SharedBuffer::create(WTFMove(convertedFont));
124 return createFontCustomPlatformData(buffer, itemInCollection);
125 }
126#endif
127
128 return createFontCustomPlatformData(bytes, itemInCollection);
129}
130
131RefPtr<Font> CachedFont::createFont(const FontDescription& fontDescription, const AtomicString&, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
132{
133 return Font::create(platformDataFromCustomData(fontDescription, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities), Font::Origin::Remote);
134}
135
136FontPlatformData CachedFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
137{
138 ASSERT(m_fontCustomPlatformData);
139 return platformDataFromCustomData(*m_fontCustomPlatformData, fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
140}
141
142FontPlatformData CachedFont::platformDataFromCustomData(FontCustomPlatformData& fontCustomPlatformData, const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings, FontSelectionSpecifiedCapabilities fontFaceCapabilities)
143{
144 return fontCustomPlatformData.fontPlatformData(fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings, fontFaceCapabilities);
145}
146
147void CachedFont::allClientsRemoved()
148{
149 m_fontCustomPlatformData = nullptr;
150}
151
152void CachedFont::checkNotify()
153{
154 if (isLoading())
155 return;
156
157 CachedResourceClientWalker<CachedFontClient> walker(m_clients);
158 while (CachedFontClient* client = walker.next())
159 client->fontLoaded(*this);
160}
161
162bool CachedFont::mayTryReplaceEncodedData() const
163{
164 // If a FontCustomPlatformData has ever been constructed to wrap the internal resource buffer then it still might be in use somewhere.
165 // That platform font object might directly reference the encoded data buffer behind this CachedFont,
166 // so replacing it is unsafe.
167
168 return !m_hasCreatedFontDataWrappingResource;
169}
170
171}
172