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1 /* | 1 /* |
2 * Copyright (C) 2009 Google Inc. All rights reserved. | 2 * Copyright (C) 2009 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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34 #include "RuntimeEnabledFeatures.h" | 34 #include "RuntimeEnabledFeatures.h" |
35 #include "platform/SharedBuffer.h" | 35 #include "platform/SharedBuffer.h" |
36 #include "opentype-sanitiser.h" | 36 #include "opentype-sanitiser.h" |
37 #include "ots-memory-stream.h" | 37 #include "ots-memory-stream.h" |
38 | 38 |
39 namespace WebCore { | 39 namespace WebCore { |
40 | 40 |
41 PassRefPtr<SharedBuffer> OpenTypeSanitizer::sanitize() | 41 PassRefPtr<SharedBuffer> OpenTypeSanitizer::sanitize() |
42 { | 42 { |
43 if (!m_buffer) | 43 if (!m_buffer) |
44 return 0; | 44 return nullptr; |
45 | 45 |
46 // This is the largest web font size which we'll try to transcode. | 46 // This is the largest web font size which we'll try to transcode. |
47 static const size_t maxWebFontSize = 30 * 1024 * 1024; // 30 MB | 47 static const size_t maxWebFontSize = 30 * 1024 * 1024; // 30 MB |
48 if (m_buffer->size() > maxWebFontSize) | 48 if (m_buffer->size() > maxWebFontSize) |
49 return 0; | 49 return nullptr; |
50 | 50 |
51 if (RuntimeEnabledFeatures::woff2Enabled()) | 51 if (RuntimeEnabledFeatures::woff2Enabled()) |
52 ots::EnableWOFF2(); | 52 ots::EnableWOFF2(); |
53 | 53 |
54 // A transcoded font is usually smaller than an original font. | 54 // A transcoded font is usually smaller than an original font. |
55 // However, it can be slightly bigger than the original one due to | 55 // However, it can be slightly bigger than the original one due to |
56 // name table replacement and/or padding for glyf table. | 56 // name table replacement and/or padding for glyf table. |
57 // | 57 // |
58 // With WOFF fonts, however, we'll be decompressing, so the result can be | 58 // With WOFF fonts, however, we'll be decompressing, so the result can be |
59 // much larger than the original. | 59 // much larger than the original. |
60 | 60 |
61 ots::ExpandingMemoryStream output(m_buffer->size(), maxWebFontSize); | 61 ots::ExpandingMemoryStream output(m_buffer->size(), maxWebFontSize); |
62 if (!ots::Process(&output, reinterpret_cast<const uint8_t*>(m_buffer->data()
), m_buffer->size())) | 62 if (!ots::Process(&output, reinterpret_cast<const uint8_t*>(m_buffer->data()
), m_buffer->size())) |
63 return 0; | 63 return nullptr; |
64 | 64 |
65 const size_t transcodeLen = output.Tell(); | 65 const size_t transcodeLen = output.Tell(); |
66 return SharedBuffer::create(static_cast<unsigned char*>(output.get()), trans
codeLen); | 66 return SharedBuffer::create(static_cast<unsigned char*>(output.get()), trans
codeLen); |
67 } | 67 } |
68 | 68 |
69 bool OpenTypeSanitizer::supportsFormat(const String& format) | 69 bool OpenTypeSanitizer::supportsFormat(const String& format) |
70 { | 70 { |
71 return equalIgnoringCase(format, "woff") | 71 return equalIgnoringCase(format, "woff") |
72 || (RuntimeEnabledFeatures::woff2Enabled() && equalIgnoringCase(format,
"woff2")); | 72 || (RuntimeEnabledFeatures::woff2Enabled() && equalIgnoringCase(format,
"woff2")); |
73 } | 73 } |
74 | 74 |
75 } // namespace WebCore | 75 } // namespace WebCore |
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