1 /*
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 * Copyright (C) 2009 Maxime Simon <simon.maxime@gmail.com> All rights reserved.
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 * its contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "config.h"
31 #include "SimpleFontData.h"
32
33 #include "FloatRect.h"
34 #include "FontCache.h"
35 #include "FontDescription.h"
36 #include "NotImplemented.h"
37 #include "TextEncoding.h"
38 #include <wtf/text/CString.h>
39
40
41 namespace WebCore {
42
platformInit()43 void SimpleFontData::platformInit()
44 {
45 const BFont* font = m_platformData.font();
46 if (!font)
47 return;
48
49 font_height height;
50 font->GetHeight(&height);
51 m_fontMetrics.setAscent(height.ascent);
52 m_fontMetrics.setDescent(height.descent);
53 m_fontMetrics.setXHeight(height.ascent * 0.56f); // Hack taken from the win port.
54 m_fontMetrics.setLineGap(height.leading);
55 m_fontMetrics.setLineSpacing(lroundf(height.ascent) + lroundf(height.descent) + lroundf(height.leading));
56 }
57
platformCharWidthInit()58 void SimpleFontData::platformCharWidthInit()
59 {
60 m_avgCharWidth = 0.f;
61 m_maxCharWidth = 0.f;
62 initCharWidths();
63 }
64
platformDestroy()65 void SimpleFontData::platformDestroy()
66 {
67 }
68
scaledFontData(const FontDescription & fontDescription,float scaleFactor) const69 SimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const
70 {
71 FontDescription desc = FontDescription(fontDescription);
72 desc.setSpecifiedSize(scaleFactor * fontDescription.computedSize());
73 FontPlatformData fontPlatformData(desc, desc.family().family());
74 return new SimpleFontData(fontPlatformData, isCustomFont(), false);
75 }
76
smallCapsFontData(const FontDescription & fontDescription) const77 SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
78 {
79 if (!m_derivedFontData)
80 m_derivedFontData = DerivedFontData::create(isCustomFont());
81 if (!m_derivedFontData->smallCaps)
82 m_derivedFontData->smallCaps = scaledFontData(fontDescription, .7);
83
84 return m_derivedFontData->smallCaps.get();
85 }
86
emphasisMarkFontData(const FontDescription & fontDescription) const87 SimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const
88 {
89 if (!m_derivedFontData)
90 m_derivedFontData = DerivedFontData::create(isCustomFont());
91 if (!m_derivedFontData->emphasisMark)
92 m_derivedFontData->emphasisMark = scaledFontData(fontDescription, .5);
93
94 return m_derivedFontData->emphasisMark.get();
95 }
96
containsCharacters(const UChar * characters,int length) const97 bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
98 {
99 // FIXME: We will need to implement this to load non-ASCII encoding sites
100 return true;
101 }
102
determinePitch()103 void SimpleFontData::determinePitch()
104 {
105 m_treatAsFixedPitch = m_platformData.font() && m_platformData.font()->IsFixed();
106 }
107
platformMetricsForGlyph(Glyph glyph,GlyphMetricsMode) const108 GlyphMetrics SimpleFontData::platformMetricsForGlyph(Glyph glyph, GlyphMetricsMode) const
109 {
110 GlyphMetrics metrics;
111 if (!m_platformData.font())
112 return metrics;
113
114 CString encoded = UTF8Encoding().encode(static_cast<UChar*>(&glyph), 1,
115 URLEncodedEntitiesForUnencodables);
116 float escapements[1];
117 m_platformData.font()->GetEscapements(encoded.data(), 1, escapements);
118 metrics.horizontalAdvance = escapements[0] * m_platformData.font()->Size();
119 return metrics;
120 }
121
122 } // namespace WebCore
123
124