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
|
/*
* Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "FontCustomPlatformData.h"
#include "Base64.h"
#include "CachedFont.h"
#include "FontPlatformData.h"
#include "SharedBuffer.h"
#include <wtf/RandomNumber.h>
namespace WebCore {
static CustomFontCache* g_customFontCache = 0;
bool renameFont(SharedBuffer* fontData, const String& fontName);
void setCustomFontCache(CustomFontCache* cache)
{
g_customFontCache = cache;
}
FontCustomPlatformData::~FontCustomPlatformData()
{
if (g_customFontCache && !m_name.isEmpty())
g_customFontCache->unregisterFont(m_name);
}
FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation, FontRenderingMode renderingMode)
{
FontDescription fontDesc;
fontDesc.setComputedSize(size);
fontDesc.setSpecifiedSize(size);
fontDesc.setItalic(italic);
fontDesc.setWeight(bold ? FontWeightBold : FontWeightNormal);
return FontPlatformData(fontDesc, m_name, false);
}
// Creates a unique and unpredictable font name, in order to avoid collisions and to
// not allow access from CSS.
static String createUniqueFontName()
{
Vector<char> fontUuid(sizeof(GUID));
unsigned int* ptr = reinterpret_cast<unsigned int*>(fontUuid.data());
for (int i = 0; i < sizeof(GUID) / sizeof(int) ; ++i)
*(ptr + i) = static_cast<unsigned int>(randomNumber() * (std::numeric_limits<unsigned>::max() + 1.0));
Vector<char> fontNameVector;
base64Encode(fontUuid, fontNameVector);
ASSERT(fontNameVector.size() < LF_FACESIZE);
String fontName(fontNameVector.data(), fontNameVector.size());
return fontName.replace('/', '_');
}
FontCustomPlatformData* createFontCustomPlatformData(const SharedBuffer* buffer)
{
if (g_customFontCache) {
String fontName = createUniqueFontName();
RefPtr<SharedBuffer> localBuffer = SharedBuffer::create(buffer->data(), buffer->size());
if (renameFont(localBuffer.get(), fontName) && g_customFontCache->registerFont(fontName, localBuffer.get()))
return new FontCustomPlatformData(fontName);
}
return 0;
}
bool FontCustomPlatformData::supportsFormat(const String& format)
{
return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype");
}
}
|
