1 /*
2 * Copyright (C) 2008 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 COMPUTER, 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 COMPUTER, 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 "CSSSegmentedFontFace.h"
28
29 #include "CSSFontFace.h"
30 #include "CSSFontSelector.h"
31 #include "FontDescription.h"
32 #include "SegmentedFontData.h"
33 #include "SimpleFontData.h"
34
35 namespace WebCore {
36
CSSSegmentedFontFace(CSSFontSelector * fontSelector)37 CSSSegmentedFontFace::CSSSegmentedFontFace(CSSFontSelector* fontSelector)
38 : m_fontSelector(fontSelector)
39 {
40 }
41
~CSSSegmentedFontFace()42 CSSSegmentedFontFace::~CSSSegmentedFontFace()
43 {
44 pruneTable();
45 unsigned size = m_fontFaces.size();
46 for (unsigned i = 0; i < size; i++)
47 m_fontFaces[i]->removedFromSegmentedFontFace(this);
48 }
49
pruneTable()50 void CSSSegmentedFontFace::pruneTable()
51 {
52 // Make sure the glyph page tree prunes out all uses of this custom font.
53 if (m_fontDataTable.isEmpty())
54 return;
55 HashMap<unsigned, SegmentedFontData*>::iterator end = m_fontDataTable.end();
56 for (HashMap<unsigned, SegmentedFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
57 GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
58 deleteAllValues(m_fontDataTable);
59 m_fontDataTable.clear();
60 }
61
isLoaded() const62 bool CSSSegmentedFontFace::isLoaded() const
63 {
64 unsigned size = m_fontFaces.size();
65 for (unsigned i = 0; i < size; i++) {
66 if (!m_fontFaces[i]->isLoaded())
67 return false;
68 }
69 return true;
70 }
71
isValid() const72 bool CSSSegmentedFontFace::isValid() const
73 {
74 unsigned size = m_fontFaces.size();
75 for (unsigned i = 0; i < size; i++) {
76 if (!m_fontFaces[i]->isValid())
77 return false;
78 }
79 return true;
80 }
81
fontLoaded(CSSFontFace *)82 void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
83 {
84 pruneTable();
85 }
86
appendFontFace(PassRefPtr<CSSFontFace> fontFace)87 void CSSSegmentedFontFace::appendFontFace(PassRefPtr<CSSFontFace> fontFace)
88 {
89 pruneTable();
90 fontFace->addedToSegmentedFontFace(this);
91 m_fontFaces.append(fontFace);
92 }
93
getFontData(const FontDescription & fontDescription)94 FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
95 {
96 if (!isValid())
97 return 0;
98
99 FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
100 unsigned hashKey = fontDescription.computedPixelSize() << FontTraitsMaskWidth | desiredTraitsMask;
101
102 SegmentedFontData* fontData = m_fontDataTable.get(hashKey);
103 if (fontData)
104 return fontData;
105
106 fontData = new SegmentedFontData();
107
108 unsigned size = m_fontFaces.size();
109 for (unsigned i = 0; i < size; i++) {
110 FontTraitsMask traitsMask = m_fontFaces[i]->traitsMask();
111 bool syntheticBold = !(traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask));
112 bool syntheticItalic = !(traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask);
113 if (const FontData* faceFontData = m_fontFaces[i]->getFontData(fontDescription, syntheticBold, syntheticItalic)) {
114 ASSERT(!faceFontData->isSegmented());
115 const Vector<CSSFontFace::UnicodeRange>& ranges = m_fontFaces[i]->ranges();
116 unsigned numRanges = ranges.size();
117 if (!numRanges)
118 fontData->appendRange(FontDataRange(0, 0x7FFFFFFF, static_cast<const SimpleFontData*>(faceFontData)));
119 else {
120 for (unsigned j = 0; j < numRanges; ++j)
121 fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), static_cast<const SimpleFontData*>(faceFontData)));
122 }
123 }
124 }
125 if (fontData->numRanges())
126 m_fontDataTable.set(hashKey, fontData);
127 else {
128 delete fontData;
129 fontData = 0;
130 }
131
132 return fontData;
133 }
134
135 }
136