1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* Copyright 2009, The Android Open Source Project
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FontCache.h"
#include "Font.h"
#include "FontPlatformData.h"
#include "NotImplemented.h"
#include "SimpleFontData.h"
#include "SkPaint.h"
#include "SkTypeface.h"
#include "SkUtils.h"
namespace WebCore {
static const char* getFallbackFontName(const FontDescription& fontDescription)
{
switch (fontDescription.genericFamily()) {
case FontDescription::StandardFamily:
case FontDescription::SerifFamily:
return "serif";
case FontDescription::SansSerifFamily:
return "sans-serif";
case FontDescription::MonospaceFamily:
return "monospace";
case FontDescription::CursiveFamily:
return "cursive";
case FontDescription::FantasyFamily:
return "fantasy";
case FontDescription::NoFamily:
default:
return "";
}
}
static bool isFallbackFamily(String family)
{
return family.startsWith("-webkit-")
|| equalIgnoringCase(family, "serif")
|| equalIgnoringCase(family, "sans-serif")
|| equalIgnoringCase(family, "sans")
|| equalIgnoringCase(family, "monospace")
|| equalIgnoringCase(family, "times") // skia aliases for serif
|| equalIgnoringCase(family, "times new roman")
|| equalIgnoringCase(family, "palatino")
|| equalIgnoringCase(family, "georgia")
|| equalIgnoringCase(family, "baskerville")
|| equalIgnoringCase(family, "goudy")
|| equalIgnoringCase(family, "cursive")
|| equalIgnoringCase(family, "fantasy")
|| equalIgnoringCase(family, "ITC Stone Serif")
|| equalIgnoringCase(family, "arial") // skia aliases for sans-serif
|| equalIgnoringCase(family, "helvetica")
|| equalIgnoringCase(family, "tahoma")
|| equalIgnoringCase(family, "verdana")
|| equalIgnoringCase(family, "courier") // skia aliases for monospace
|| equalIgnoringCase(family, "courier new")
|| equalIgnoringCase(family, "monaco");
}
static char* AtomicStringToUTF8String(const AtomicString& utf16)
{
SkASSERT(sizeof(uint16_t) == sizeof(utf16.characters()[0]));
const uint16_t* uni = (uint16_t*)utf16.characters();
size_t bytes = SkUTF16_ToUTF8(uni, utf16.length(), 0);
char* utf8 = (char*)sk_malloc_throw(bytes + 1);
(void)SkUTF16_ToUTF8(uni, utf16.length(), utf8);
utf8[bytes] = 0;
return utf8;
}
void FontCache::platformInit()
{
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
// since all of our fonts logically map to the fallback, we can always claim
// that each font supports all characters.
return font.primaryFont();
}
SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
{
return 0;
}
SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& description)
{
static const AtomicString sansStr("sans-serif");
static const AtomicString serifStr("serif");
static const AtomicString monospaceStr("monospace");
FontPlatformData* fontPlatformData = 0;
switch (description.genericFamily()) {
case FontDescription::SerifFamily:
fontPlatformData = getCachedFontPlatformData(description, serifStr);
break;
case FontDescription::MonospaceFamily:
fontPlatformData = getCachedFontPlatformData(description, monospaceStr);
break;
case FontDescription::SansSerifFamily:
default:
fontPlatformData = getCachedFontPlatformData(description, sansStr);
break;
}
ASSERT(fontPlatformData);
return getCachedFontData(fontPlatformData);
}
FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
{
char* storage = 0;
const char* name = 0;
FontPlatformData* result = 0;
if (family.length()) {
storage = AtomicStringToUTF8String(family);
name = storage;
} else
name = getFallbackFontName(fontDescription);
int style = SkTypeface::kNormal;
if (fontDescription.weight() >= FontWeightBold)
style |= SkTypeface::kBold;
if (fontDescription.italic())
style |= SkTypeface::kItalic;
// CreateFromName always returns a typeface, falling back to a default font
// if the one requested is not found. Calling Equal() with a null pointer
// serves to compare the returned font against the default, with the caveat
// that the default is always of normal style. If we detect the default, we
// ignore it and allow WebCore to give us the next font on the CSS fallback
// list. The only exception is if the family name is a commonly used generic
// family, as when called by getSimilarFontPlatformData() and
// getLastResortFallbackFont(). In this case, the default font is an
// acceptable result.
SkTypeface* tf = SkTypeface::CreateFromName(name, SkTypeface::kNormal);
if (!SkTypeface::Equal(tf, 0) || isFallbackFamily(family.string())) {
// We had to use normal styling to see if this was a default font. If
// we need bold or italic, replace with the corrected typeface.
if (style != SkTypeface::kNormal) {
tf->unref();
tf = SkTypeface::CreateFromName(name, (SkTypeface::Style)style);
}
result = new FontPlatformData(tf, fontDescription.computedSize(),
(style & SkTypeface::kBold),
(style & SkTypeface::kItalic) && !tf->isItalic(),
fontDescription.orientation(),
fontDescription.textOrientation());
}
tf->unref();
sk_free(storage);
return result;
}
// new as of SVN change 36269, Sept 8, 2008
void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
{
// Don't understand this yet, but it seems safe to leave unimplemented
}
}
|
