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
isValid() const62 bool CSSSegmentedFontFace::isValid() const
63 {
64 // Valid if at least one font face is valid.
65 unsigned size = m_fontFaces.size();
66 for (unsigned i = 0; i < size; i++) {
67 if (m_fontFaces[i]->isValid())
68 return true;
69 }
70 return false;
71 }
72
fontLoaded(CSSFontFace *)73 void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
74 {
75 pruneTable();
76 }
77
appendFontFace(PassRefPtr<CSSFontFace> fontFace)78 void CSSSegmentedFontFace::appendFontFace(PassRefPtr<CSSFontFace> fontFace)
79 {
80 pruneTable();
81 fontFace->addedToSegmentedFontFace(this);
82 m_fontFaces.append(fontFace);
83 }
84
getFontData(const FontDescription & fontDescription)85 FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
86 {
87 if (!isValid())
88 return 0;
89
90 FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
91 unsigned hashKey = ((fontDescription.computedPixelSize() + 1) << (FontTraitsMaskWidth + 1)) | ((fontDescription.orientation() == Vertical ? 1 : 0) << FontTraitsMaskWidth) | desiredTraitsMask;
92
93 SegmentedFontData* fontData = m_fontDataTable.get(hashKey);
94 if (fontData)
95 return fontData;
96
97 fontData = new SegmentedFontData();
98
99 unsigned size = m_fontFaces.size();
100 for (unsigned i = 0; i < size; i++) {
101 if (!m_fontFaces[i]->isValid())
102 continue;
103 FontTraitsMask traitsMask = m_fontFaces[i]->traitsMask();
104 bool syntheticBold = !(traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask));
105 bool syntheticItalic = !(traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask);
106 if (const SimpleFontData* faceFontData = m_fontFaces[i]->getFontData(fontDescription, syntheticBold, syntheticItalic)) {
107 ASSERT(!faceFontData->isSegmented());
108 const Vector<CSSFontFace::UnicodeRange>& ranges = m_fontFaces[i]->ranges();
109 unsigned numRanges = ranges.size();
110 if (!numRanges)
111 fontData->appendRange(FontDataRange(0, 0x7FFFFFFF, faceFontData));
112 else {
113 for (unsigned j = 0; j < numRanges; ++j)
114 fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), faceFontData));
115 }
116 }
117 }
118 if (fontData->numRanges())
119 m_fontDataTable.set(hashKey, fontData);
120 else {
121 delete fontData;
122 fontData = 0;
123 }
124
125 return fontData;
126 }
127
128 }
129