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
56 HashMap<unsigned, SegmentedFontData*>::iterator end = m_fontDataTable.end();
57 for (HashMap<unsigned, SegmentedFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
58 m_fontSelector->retireCustomFont(it->second);
59
60 m_fontDataTable.clear();
61 }
62
isValid() const63 bool CSSSegmentedFontFace::isValid() const
64 {
65 // Valid if at least one font face is valid.
66 unsigned size = m_fontFaces.size();
67 for (unsigned i = 0; i < size; i++) {
68 if (m_fontFaces[i]->isValid())
69 return true;
70 }
71 return false;
72 }
73
fontLoaded(CSSFontFace *)74 void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
75 {
76 pruneTable();
77 }
78
appendFontFace(PassRefPtr<CSSFontFace> fontFace)79 void CSSSegmentedFontFace::appendFontFace(PassRefPtr<CSSFontFace> fontFace)
80 {
81 pruneTable();
82 fontFace->addedToSegmentedFontFace(this);
83 m_fontFaces.append(fontFace);
84 }
85
getFontData(const FontDescription & fontDescription)86 FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
87 {
88 if (!isValid())
89 return 0;
90
91 FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
92 unsigned hashKey = ((fontDescription.computedPixelSize() + 1) << (FontTraitsMaskWidth + 1)) | ((fontDescription.orientation() == Vertical ? 1 : 0) << FontTraitsMaskWidth) | desiredTraitsMask;
93
94 SegmentedFontData* fontData = m_fontDataTable.get(hashKey);
95 if (fontData)
96 return fontData;
97
98 fontData = new SegmentedFontData();
99
100 unsigned size = m_fontFaces.size();
101 for (unsigned i = 0; i < size; i++) {
102 if (!m_fontFaces[i]->isValid())
103 continue;
104 FontTraitsMask traitsMask = m_fontFaces[i]->traitsMask();
105 bool syntheticBold = !(traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask));
106 bool syntheticItalic = !(traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask);
107 if (const SimpleFontData* faceFontData = m_fontFaces[i]->getFontData(fontDescription, syntheticBold, syntheticItalic)) {
108 ASSERT(!faceFontData->isSegmented());
109 const Vector<CSSFontFace::UnicodeRange>& ranges = m_fontFaces[i]->ranges();
110 unsigned numRanges = ranges.size();
111 if (!numRanges)
112 fontData->appendRange(FontDataRange(0, 0x7FFFFFFF, faceFontData));
113 else {
114 for (unsigned j = 0; j < numRanges; ++j)
115 fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), faceFontData));
116 }
117 }
118 }
119 if (fontData->numRanges())
120 m_fontDataTable.set(hashKey, fontData);
121 else {
122 delete fontData;
123 fontData = 0;
124 }
125
126 return fontData;
127 }
128
129 }
130